* Re: [REGRESSION] rseq: refactoring in v6.19 broke everyone on arm64 and tcmalloc everywhere
From: Peter Zijlstra @ 2026-04-28 8:13 UTC (permalink / raw)
To: Thomas Gleixner
Cc: Mathias Stearn, Dmitry Vyukov, Jinjie Ruan, linux-man,
Mark Rutland, Mathieu Desnoyers, Catalin Marinas, Will Deacon,
Boqun Feng, Paul E. McKenney, Chris Kennelly, regressions,
linux-kernel, linux-arm-kernel, Ingo Molnar, Blake Oler,
Florian Weimer, Rich Felker, Matthew Wilcox, Greg Kroah-Hartman,
Linus Torvalds
In-Reply-To: <20260428073938.GH3126523@noisy.programming.kicks-ass.net>
On Tue, Apr 28, 2026 at 09:39:38AM +0200, Peter Zijlstra wrote:
> > + return IS_ALIGNED((unsigned long)rseq, rseq_alloc_align()) &&
> > + rseq_len >= offsetof(struct rseq, end);
> > +}
>
> Given we really only differentiate between ORIG_RSEQ_SIZE (32) and
> sizeof(struct rseq), perhaps we should also add something like:
>
> if (rseq_len != sizeof(struct rseq))
> return false;
>
Wakeup juice, I need more wakeup juice :-) Its there, except written
weirdly with that offsetof thing.
^ permalink raw reply
* Re: [PATCH] gpio: ixp4xx: switch to dynamic GPIO base
From: Bartosz Golaszewski @ 2026-04-28 8:14 UTC (permalink / raw)
To: Linus Walleij, Imre Kaloz, Bartosz Golaszewski, linux-arm-kernel,
linux-gpio, linux-kernel, Mohamed Ayman
Cc: Bartosz Golaszewski
In-Reply-To: <20260427214311.331996-1-mohamedaymanworkspace@gmail.com>
On Tue, 28 Apr 2026 00:43:10 +0300, Mohamed Ayman wrote:
> Most IXP4xx platforms are Device Tree-based, and GPIO consumers
> use phandle-based descriptors rather than legacy integer GPIO numbers.
>
> Audit of the IXP4xx platform shows:
> - No gpio_request(), gpio_get_value(), or gpio_set_value() users
> in arch/arm/mach-ixp4xx/
> - No platform data using fixed GPIO numbers
>
> [...]
Applied, thanks!
[1/1] gpio: ixp4xx: switch to dynamic GPIO base
https://git.kernel.org/brgl/c/1005d6e0257a5623ef79bfbd8f588b498c1cab0d
Best regards,
--
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
^ permalink raw reply
* Re: [REGRESSION] rseq: refactoring in v6.19 broke everyone on arm64 and tcmalloc everywhere
From: Thomas Gleixner @ 2026-04-28 8:18 UTC (permalink / raw)
To: Dmitry Vyukov
Cc: Peter Zijlstra, Mathias Stearn, Jinjie Ruan, linux-man,
Mark Rutland, Mathieu Desnoyers, Catalin Marinas, Will Deacon,
Boqun Feng, Paul E. McKenney, Chris Kennelly, regressions,
linux-kernel, linux-arm-kernel, Ingo Molnar, Blake Oler,
Florian Weimer, Rich Felker, Matthew Wilcox, Greg Kroah-Hartman,
Linus Torvalds
In-Reply-To: <878qa7zexc.ffs@tglx>
On Tue, Apr 28 2026 at 10:07, Thomas Gleixner wrote:
>> Not sure if that's it, or there is something else.
>
> Can you try the updated version below?
Is there a pre-compiled version of those tcmalloc tests somewhere?
I tried to build it from source, but I really have better things to do
than wasting my time on debugging this bazel nonsense.
Thanks,
tglx
^ permalink raw reply
* [PATCH 2/2] pinctrl: meson: support amlogic A9 SoC
From: Xianwei Zhao via B4 Relay @ 2026-04-28 8:22 UTC (permalink / raw)
To: Linus Walleij, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Martin Blumenstingl
Cc: linux-amlogic, linux-gpio, devicetree, linux-kernel,
linux-arm-kernel, Xianwei Zhao
In-Reply-To: <20260428-a9-pinctrl-v1-0-cd611bb5f52d@amlogic.com>
From: Xianwei Zhao <xianwei.zhao@amlogic.com>
In Amlogic A9 SoC, subordinate bank reuse other master bank is
not from bit0, and subordinate bank reuse multi master banks.
This submission implements this situation.
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
drivers/pinctrl/meson/pinctrl-amlogic-a4.c | 61 +++++++++++++++++++++++++++---
1 file changed, 56 insertions(+), 5 deletions(-)
diff --git a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
index e2293a872dcb..256d9787f004 100644
--- a/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
+++ b/drivers/pinctrl/meson/pinctrl-amlogic-a4.c
@@ -55,14 +55,18 @@ struct aml_pio_control {
* partial bank(subordinate) pins mux config use other bank(main) mux registgers
* m_bank_id: the main bank which pin_id from 0, but register bit not from bit 0
* m_bit_offs: bit offset the main bank mux register
+ * s_bit_offs: start bit that subordinate bank use mux register
* sid: start pin_id of subordinate bank
* eid: end pin_id of subordinate bank
+ * next: subordinate bank reused multiple other bank groups.
*/
struct multi_mux {
unsigned int m_bank_id;
unsigned int m_bit_offs;
+ unsigned int s_bit_offs;
unsigned int sid;
unsigned int eid;
+ const struct multi_mux *next;
};
struct aml_pctl_data {
@@ -124,12 +128,51 @@ static const char *aml_bank_name[31] = {
"GPIOCC", "TEST_N", "ANALOG"
};
+static const struct multi_mux multi_mux_a9[] = {
+ {
+ .m_bank_id = AMLOGIC_GPIO_C,
+ .m_bit_offs = 4,
+ .s_bit_offs = 0,
+ .sid = (AMLOGIC_GPIO_D << 8) + 16,
+ .eid = (AMLOGIC_GPIO_D << 8) + 16,
+ .next = &multi_mux_a9[1],
+ }, {
+ .m_bank_id = AMLOGIC_GPIO_AO,
+ .m_bit_offs = 0,
+ .s_bit_offs = 52,
+ .sid = (AMLOGIC_GPIO_D << 8) + 17,
+ .eid = (AMLOGIC_GPIO_D << 8) + 17,
+ .next = NULL,
+ }, {
+ .m_bank_id = AMLOGIC_GPIO_A,
+ .m_bit_offs = 0,
+ .s_bit_offs = 80,
+ .sid = (AMLOGIC_GPIO_Y << 8) + 8,
+ .eid = (AMLOGIC_GPIO_Y << 8) + 9,
+ .next = NULL,
+ }, {
+ .m_bank_id = AMLOGIC_GPIO_CC,
+ .m_bit_offs = 24,
+ .s_bit_offs = 0,
+ .sid = (AMLOGIC_GPIO_X << 8) + 16,
+ .eid = (AMLOGIC_GPIO_X << 8) + 17,
+ .next = NULL,
+ },
+};
+
+static const struct aml_pctl_data a9_priv_data = {
+ .number = ARRAY_SIZE(multi_mux_a9),
+ .p_mux = multi_mux_a9,
+};
+
static const struct multi_mux multi_mux_s7[] = {
{
.m_bank_id = AMLOGIC_GPIO_CC,
.m_bit_offs = 24,
+ .s_bit_offs = 0,
.sid = (AMLOGIC_GPIO_X << 8) + 16,
.eid = (AMLOGIC_GPIO_X << 8) + 19,
+ .next = NULL,
},
};
@@ -142,13 +185,17 @@ static const struct multi_mux multi_mux_s6[] = {
{
.m_bank_id = AMLOGIC_GPIO_CC,
.m_bit_offs = 24,
+ .s_bit_offs = 0,
.sid = (AMLOGIC_GPIO_X << 8) + 16,
.eid = (AMLOGIC_GPIO_X << 8) + 19,
+ .next = NULL,
}, {
.m_bank_id = AMLOGIC_GPIO_F,
.m_bit_offs = 4,
+ .s_bit_offs = 0,
.sid = (AMLOGIC_GPIO_D << 8) + 6,
.eid = (AMLOGIC_GPIO_D << 8) + 6,
+ .next = NULL,
},
};
@@ -177,31 +224,34 @@ static int aml_pctl_set_function(struct aml_pinctrl *info,
struct aml_gpio_bank *bank = gpio_chip_to_bank(range->gc);
unsigned int shift;
int reg;
- int i;
+ int i, loop_count;
unsigned int offset = bank->mux_bit_offs;
const struct multi_mux *p_mux;
/* peculiar mux reg set */
- if (bank->p_mux) {
- p_mux = bank->p_mux;
+ loop_count = 10;
+ p_mux = bank->p_mux;
+ while (p_mux && loop_count) {
if (pin_id >= p_mux->sid && pin_id <= p_mux->eid) {
bank = NULL;
for (i = 0; i < info->nbanks; i++) {
if (info->banks[i].bank_id == p_mux->m_bank_id) {
bank = &info->banks[i];
- break;
+ break;
}
}
if (!bank || !bank->reg_mux)
return -EINVAL;
- shift = (pin_id - p_mux->sid) << 2;
+ shift = ((pin_id - p_mux->sid) << 2) + p_mux->s_bit_offs;
reg = (shift / 32) * 4;
offset = shift % 32;
return regmap_update_bits(bank->reg_mux, reg,
0xf << offset, (func & 0xf) << offset);
}
+ p_mux = p_mux->next;
+ loop_count--;
}
/* normal mux reg set */
@@ -1159,6 +1209,7 @@ static int aml_pctl_probe(struct platform_device *pdev)
static const struct of_device_id aml_pctl_of_match[] = {
{ .compatible = "amlogic,pinctrl-a4", },
+ { .compatible = "amlogic,pinctrl-a9", .data = &a9_priv_data, },
{ .compatible = "amlogic,pinctrl-s7", .data = &s7_priv_data, },
{ .compatible = "amlogic,pinctrl-s6", .data = &s6_priv_data, },
{ /* sentinel */ }
--
2.52.0
^ permalink raw reply related
* [PATCH 1/2] dt-bindings: pinctl: amlogic,pinctrl-a4: Add compatible string for A9
From: Xianwei Zhao via B4 Relay @ 2026-04-28 8:22 UTC (permalink / raw)
To: Linus Walleij, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Martin Blumenstingl
Cc: linux-amlogic, linux-gpio, devicetree, linux-kernel,
linux-arm-kernel, Xianwei Zhao
In-Reply-To: <20260428-a9-pinctrl-v1-0-cd611bb5f52d@amlogic.com>
From: Xianwei Zhao <xianwei.zhao@amlogic.com>
Update dt-binding document for pinctrl of Amlogic A9.
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml | 1 +
1 file changed, 1 insertion(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml
index 6ba66c2033b4..b69db1b95345 100644
--- a/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/amlogic,pinctrl-a4.yaml
@@ -17,6 +17,7 @@ properties:
oneOf:
- enum:
- amlogic,pinctrl-a4
+ - amlogic,pinctrl-a9
- amlogic,pinctrl-s6
- amlogic,pinctrl-s7
- items:
--
2.52.0
^ permalink raw reply related
* [PATCH 0/2] pinctrl: add support amlogic a9
From: Xianwei Zhao via B4 Relay @ 2026-04-28 8:22 UTC (permalink / raw)
To: Linus Walleij, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Neil Armstrong, Kevin Hilman, Jerome Brunet, Martin Blumenstingl
Cc: linux-amlogic, linux-gpio, devicetree, linux-kernel,
linux-arm-kernel, Xianwei Zhao
Add pinctrl bindings and driver about for amlogic a9.
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
---
Xianwei Zhao (2):
dt-bindings: pinctl: amlogic,pinctrl-a4: Add compatible string for A9
pinctrl: meson: support amlogic A9 SoC
.../bindings/pinctrl/amlogic,pinctrl-a4.yaml | 1 +
drivers/pinctrl/meson/pinctrl-amlogic-a4.c | 61 ++++++++++++++++++++--
2 files changed, 57 insertions(+), 5 deletions(-)
---
base-commit: bd7fd288490c64835a74c05e631c102ce056d5e1
change-id: 20260129-a9-pinctrl-a9511aa224bf
Best regards,
--
Xianwei Zhao <xianwei.zhao@amlogic.com>
^ permalink raw reply
* Re: [PATCH 2/2] ASoC: dt-bindings: drop redundant wakeup-source definitions
From: Krzysztof Kozlowski @ 2026-04-28 8:33 UTC (permalink / raw)
To: Bui Duc Phuc
Cc: Lee Jones, Mark Brown, Liam Girdwood, Rob Herring,
Krzysztof Kozlowski, Conor Dooley, Heiko Stuebner, Joseph Chen,
Chris Zhong, Zhang Qing, David Rau, Animesh Agarwal, devicetree,
linux-sound, linux-rockchip, linux-arm-kernel, linux-kernel
In-Reply-To: <CAABR9nGH4yZcgyzm=wNYVHB2vLhojZJSHKOC6dSeQPm0rbh4KQ@mail.gmail.com>
On 27/04/2026 01:40, Bui Duc Phuc wrote:
> Hi,
>
>>> The 'wakeup-source' property already has its type defined in the core
>
>
>> TYPES. It is plural.
>
>
> Thank you for pointing that out. That was a mistake in my wording.
> Regarding the two data types, I’m already aware of this and have
> discussed it in a previous patch.
>
> https://lore.kernel.org/all/CAABR9nH3hr+Y5ksD0cn3Gd9XUvmb07X7zJw0b4k_yVbnAuz9=w@mail.gmail.com/
>
>>> - wakeup-source:
>
>>> - type: boolean
>
>>> - description:
>
>>> - Flag to indicate this device can wake system (suspend/resume).
>
>>> + wakeup-source: true
>
>>
>
>> That's wrong. Commit msg is making here false statements that it is
>
>> redundant. I checked (and you should too!) and driver does clearly
>
>> device_property_read_bool() thus the property CANNOT be the second type.
>
> I think Device Tree bindings should describe the hardware capability.
Yes. And the ABI. You cannot have ABI which has an incompatible
implementation. IOW, when implementation contradicts the ABI, something
is wrong.
The question of course if read_bool() is here incompatible. From the
actual code point of view, it is compatible, but how it is documented
and how it is intended to use: it is not compatible.
Also if future schema-kernel-ABI checker gets implemented, the tool
might report here a mistake for that reason. read_bool() means property
is bool.
> If the hardware supports wakeup functionality,
> referencing the core schema is sufficient. Hardware description should
> not be constrained by the current driver implementation
> ( e.g. the use of device_property_read_bool() ).
> Bindings should remain stable and generic, while drivers can evolve over time.
So you claim that bindings can define property as integer, but drivers
can evolve and for example read it as string?
>
> Re-defining the type locally duplicates the core definition. If the
> core schema evolves,
There is no re-definition here. This is choice of subset of types.
> this approach would require touching many bindings instead of updating
> one central place.
>
> This follows the recent cleanups suggested by Rob
>
> https://lore.kernel.org/all/177628888260.592110.11727813820499601669.robh@kernel.org/
> https://lore.kernel.org/all/177679687272.1458365.1328485324673928433.robh@kernel.org/
Where is Rob's suggestion to do such cleanups for EXISTING code? I only
see that new code should come like that.
Anyway, your commit msg is for me incorrect because it misses all this
points I made. Whether the schema code is correct, I'll defer to Rob,
although I still claim the same I claimed before at v2 or v3 of your
previous work - this should have defined type.
Best regards,
Krzysztof
^ permalink raw reply
* Re: [REGRESSION] rseq: refactoring in v6.19 broke everyone on arm64 and tcmalloc everywhere
From: Thomas Gleixner @ 2026-04-28 8:36 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Mathias Stearn, Dmitry Vyukov, Jinjie Ruan, linux-man,
Mark Rutland, Mathieu Desnoyers, Catalin Marinas, Will Deacon,
Boqun Feng, Paul E. McKenney, Chris Kennelly, regressions,
linux-kernel, linux-arm-kernel, Ingo Molnar, Blake Oler,
Florian Weimer, Rich Felker, Matthew Wilcox, Greg Kroah-Hartman,
Linus Torvalds
In-Reply-To: <20260428080359.GI3126523@noisy.programming.kicks-ass.net>
On Tue, Apr 28 2026 at 10:03, Peter Zijlstra wrote:
> On Mon, Apr 27, 2026 at 12:04:48AM +0200, Thomas Gleixner wrote:
>> + * - 5
>> + - Time slice extensions
>> + - Not supported
>> + - Supported
>
> I'm sure its cute when rendered, but when read as text this is nigh on
> unreadable.
I tried the other table variants. They are even worse :)
^ permalink raw reply
* [PATCH net] net: airoha: Move entries to queue head in case of DMA mapping failure in airoha_dev_xmit()
From: Lorenzo Bianconi @ 2026-04-28 8:44 UTC (permalink / raw)
To: Andrew Lunn, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Jacob Keller
Cc: Simon Horman, linux-arm-kernel, linux-mediatek, netdev,
Lorenzo Bianconi
In order to respect the original descriptor order and avoid any
potential IOMMU fault or memory corruption, move pending queue entries
to the head of hw queue tx_list if the DMA mapping of current inflight
packet fails in airoha_dev_xmit routine.
Fixes: 3f47e67dff1f7 ("net: airoha: Add the capability to consume out-of-order DMA tx descriptors")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
drivers/net/ethernet/airoha/airoha_eth.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 5effb4a4ae84..82018a085e46 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -2123,14 +2123,14 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb,
return NETDEV_TX_OK;
error_unmap:
- while (!list_empty(&tx_list)) {
+ list_for_each_entry(e, &tx_list, list) {
e = list_first_entry(&tx_list, struct airoha_queue_entry,
list);
dma_unmap_single(dev->dev.parent, e->dma_addr, e->dma_len,
DMA_TO_DEVICE);
e->dma_addr = 0;
- list_move_tail(&e->list, &q->tx_list);
}
+ list_splice(&tx_list, &q->tx_list);
spin_unlock_bh(&q->lock);
error:
---
base-commit: 3bc179bc7146c26c9dff75d2943d10528274e301
change-id: 20260428-airoha-xmit-unmap-error-path-8125594efb23
Best regards,
--
Lorenzo Bianconi <lorenzo@kernel.org>
^ permalink raw reply related
* Re: [PATCH v2 3/3] ASoC: fsl: imx-rpmsg: Switch to core ignore-suspend-widgets support
From: Mark Brown @ 2026-04-28 8:48 UTC (permalink / raw)
To: Chancel Liu
Cc: lgirdwood, perex, tiwai, shengjiu.wang, Xiubo.Lee, festevam,
nicoleotsuka, Frank.Li, s.hauer, kernel, shumingf, rander.wang,
pierre-louis.bossart, linux-sound, linux-kernel, linuxppc-dev,
imx, linux-arm-kernel
In-Reply-To: <20260415081942.4183108-4-chancel.liu@nxp.com>
[-- Attachment #1: Type: text/plain, Size: 596 bytes --]
On Wed, Apr 15, 2026 at 05:19:42PM +0900, Chancel Liu wrote:
> @@ -274,6 +257,15 @@ static int imx_rpmsg_probe(struct platform_device *pdev)
> }
> }
>
> + if (data->lpa && of_property_present(np, "ignore-suspend-widgets")) {
> + ret = snd_soc_of_parse_ignore_suspend_widgets(&data->card,
> + "ignore-suspend-widgets");
> + if (ret) {
> + dev_err(&pdev->dev, "failed to parse ignore-suspend-widgets: %d\n", ret);
> + return ret;
> + }
> + }
> +
The other error handling paths here have a goto fail to do cleanup of
the of_node in the platform device.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
^ permalink raw reply
* [PATCH v4] arm: multi_v7_defconfig: Enable BRIDGE and DP83848_PHY for TI AM57xx, AM437x and AM335x
From: Parvathi Pudi @ 2026-04-28 8:47 UTC (permalink / raw)
To: nm, vigneshr, linux, ardb, ebiggers, krzysztof.kozlowski, khilman,
arnd, geert+renesas, parvathi, tiwai, kory.maincent, andreas,
dmitry.baryshkov, prabhakar.mahadev-lad.rj, twoerner
Cc: linux-arm-kernel, linux-kernel, pratheesh, j-rameshbabu, praneeth,
srk, rogerq, danishanwar, m-malladi, krishna, mohan, pmohan,
basharath
This patch enables BRIDGE and DP83848_PHY as kernel modules for AM57xx,
AM437x and AM335x SoCs. BRIDGE is to support STP/RSTP Switch mode using
PRU-ICSS which got recently merged and DP83848 PHY driver to support
TI TLK10X PHY.
Signed-off-by: Parvathi Pudi <parvathi@couthit.com>
---
Changes from v3 to v4:
*) No changes were made, only the version was updated.
*) Rebased the series on latest linux-next.
Changes from v2 to v3 :
*) No changes were made, only the version was updated.
*) Rebased the series on latest linux-next.
Changes from v1 to v2 :
*) Addressed Krzysztof's comments on this patch.
*) Rebased the series on latest linux-next.
arch/arm/configs/multi_v7_defconfig | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index bcc9aabc1202..13362286b111 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -149,6 +149,7 @@ CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_MIP6=m
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_MULTIPLE_TABLES=y
+CONFIG_BRIDGE=m
CONFIG_NET_DSA=m
CONFIG_QRTR=m
CONFIG_QRTR_SMD=m
@@ -288,6 +289,7 @@ CONFIG_ICPLUS_PHY=y
CONFIG_MARVELL_PHY=y
CONFIG_AT803X_PHY=y
CONFIG_ROCKCHIP_PHY=y
+CONFIG_DP83848_PHY=m
CONFIG_DP83867_PHY=y
CONFIG_CAN_AT91=m
CONFIG_CAN_FLEXCAN=m
--
2.43.0
^ permalink raw reply related
* Re: [REGRESSION] rseq: refactoring in v6.19 broke everyone on arm64 and tcmalloc everywhere
From: Thomas Gleixner @ 2026-04-28 8:51 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Mathias Stearn, Dmitry Vyukov, Jinjie Ruan, linux-man,
Mark Rutland, Mathieu Desnoyers, Catalin Marinas, Will Deacon,
Boqun Feng, Paul E. McKenney, Chris Kennelly, regressions,
linux-kernel, linux-arm-kernel, Ingo Molnar, Blake Oler,
Florian Weimer, Rich Felker, Matthew Wilcox, Greg Kroah-Hartman,
Linus Torvalds
In-Reply-To: <20260428073938.GH3126523@noisy.programming.kicks-ass.net>
On Tue, Apr 28 2026 at 09:39, Peter Zijlstra wrote:
> On Mon, Apr 27, 2026 at 12:04:48AM +0200, Thomas Gleixner wrote:
>> static inline void rseq_signal_deliver(struct ksignal *ksig, struct pt_regs *regs)
>> {
>> - if (IS_ENABLED(CONFIG_GENERIC_IRQ_ENTRY)) {
>> + if (IS_ENABLED(CONFIG_GENERIC_IRQ_ENTRY) && rseq_optimized(current)) {
>
> rseq_optimized() already implies GENERIC_IRQ_ENTRY
Indeed.
>> + u8 optimized;
>> union {
>> u16 error;
>> struct {
>
> I know you like the 'optimized' name, it is faster etc. However, the
> description there suggests: has_rseq_v2 not be a bad name.
>
> And while I write this, I figured we could have the value of has_rseq be
> 2, rather than 1, but this might end up generating worse code, dunno,
> haven't tried yet.
Tried that early on and it was worse, but back the approach has changed
since then and I just validated that it's actually fine to do so. Fixed.
Thanks,
tglx
^ permalink raw reply
* [PATCH v6 01/19] dmaengine: ti: k3-udma: Fix sporadic crash on AM62x
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
From: Vignesh Raghavendra <vigneshr@ti.com>
ring_init_data is declared on stack and thus can contain garbage which
can lead to k3_ringacc_dmarings use junk address for ringrt base leading
to below crash during ring pop
[ 1.998239] cadence-qspi fc40000.spi: couldn't determine phase-detect-selector
[ 2.532106] Unable to handle kernel paging request at virtual address ffff800081a84b98
[ 2.540051] Mem abort info:
[...]
[ 2.629987] Workqueue: events_unbound deferred_probe_work_func
[ 2.635832] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 2.642787] pc : k3_ringacc_ring_pop+0x48/0x94
[ 2.647234] lr : udma_pop_from_ring+0x7c/0xb4
[...]
[ 2.726250] Call trace:
[ 2.728691] k3_ringacc_ring_pop+0x48/0x94
[ 2.732786] udma_ring_irq_handler+0x34/0x218
[ 2.737141] __handle_irq_event_percpu+0x60/0x14c
[ 2.741846] handle_irq_event+0x4c/0xa8
Fix this by explicitly initializing the variable to 0.
Reported-by: Rishikesh Donadkar <r-donadkar@ti.com>
Reported-by: Kendall Willis <k-willis@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index c964ebfcf3b68..3e9792136906a 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -5484,7 +5484,7 @@ static int udma_probe(struct platform_device *pdev)
if (ud->match_data->type == DMA_TYPE_UDMA) {
ud->ringacc = of_k3_ringacc_get_by_phandle(dev->of_node, "ti,ringacc");
} else {
- struct k3_ringacc_init_data ring_init_data;
+ struct k3_ringacc_init_data ring_init_data = { 0 };
ring_init_data.tisci = ud->tisci_rm.tisci;
ring_init_data.tisci_dev_id = ud->tisci_rm.tisci_dev_id;
--
2.53.0
^ permalink raw reply related
* [PATCH v6 02/19] dmaengine: ti: k3-udma: move macros to header file
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Move macros defined in k3-udma.c to k3-udma.h for better separation and
reuse.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma.c | 62 ---------------------------------------
drivers/dma/ti/k3-udma.h | 63 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 63 insertions(+), 62 deletions(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 3e9792136906a..e4ba5ce28c214 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -39,21 +39,6 @@ struct udma_static_tr {
u16 bstcnt; /* RPSTR1 */
};
-#define K3_UDMA_MAX_RFLOWS 1024
-#define K3_UDMA_DEFAULT_RING_SIZE 16
-
-/* How SRC/DST tag should be updated by UDMA in the descriptor's Word 3 */
-#define UDMA_RFLOW_SRCTAG_NONE 0
-#define UDMA_RFLOW_SRCTAG_CFG_TAG 1
-#define UDMA_RFLOW_SRCTAG_FLOW_ID 2
-#define UDMA_RFLOW_SRCTAG_SRC_TAG 4
-
-#define UDMA_RFLOW_DSTTAG_NONE 0
-#define UDMA_RFLOW_DSTTAG_CFG_TAG 1
-#define UDMA_RFLOW_DSTTAG_FLOW_ID 2
-#define UDMA_RFLOW_DSTTAG_DST_TAG_LO 4
-#define UDMA_RFLOW_DSTTAG_DST_TAG_HI 5
-
struct udma_chan;
enum k3_dma_type {
@@ -118,15 +103,6 @@ struct udma_oes_offsets {
u32 pktdma_rchan_flow;
};
-#define UDMA_FLAG_PDMA_ACC32 BIT(0)
-#define UDMA_FLAG_PDMA_BURST BIT(1)
-#define UDMA_FLAG_TDTYPE BIT(2)
-#define UDMA_FLAG_BURST_SIZE BIT(3)
-#define UDMA_FLAGS_J7_CLASS (UDMA_FLAG_PDMA_ACC32 | \
- UDMA_FLAG_PDMA_BURST | \
- UDMA_FLAG_TDTYPE | \
- UDMA_FLAG_BURST_SIZE)
-
struct udma_match_data {
enum k3_dma_type type;
u32 psil_base;
@@ -1837,38 +1813,6 @@ static int udma_alloc_rx_resources(struct udma_chan *uc)
return ret;
}
-#define TISCI_BCDMA_BCHAN_VALID_PARAMS ( \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_EXTENDED_CH_TYPE_VALID)
-
-#define TISCI_BCDMA_TCHAN_VALID_PARAMS ( \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID)
-
-#define TISCI_BCDMA_RCHAN_VALID_PARAMS ( \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID)
-
-#define TISCI_UDMA_TCHAN_VALID_PARAMS ( \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_EINFO_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_PSWORDS_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_ATYPE_VALID)
-
-#define TISCI_UDMA_RCHAN_VALID_PARAMS ( \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_SHORT_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_LONG_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_START_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_CNT_VALID | \
- TI_SCI_MSG_VALUE_RM_UDMAP_CH_ATYPE_VALID)
-
static int udma_tisci_m2m_channel_config(struct udma_chan *uc)
{
struct udma_dev *ud = uc->ud;
@@ -5398,12 +5342,6 @@ static enum dmaengine_alignment udma_get_copy_align(struct udma_dev *ud)
}
}
-#define TI_UDMAC_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
- BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
- BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
- BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
- BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
-
static int udma_probe(struct platform_device *pdev)
{
struct device_node *navss_node = pdev->dev.parent->of_node;
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 9062a237cd167..750720cd06911 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -97,6 +97,69 @@
/* Address Space Select */
#define K3_ADDRESS_ASEL_SHIFT 48
+#define K3_UDMA_MAX_RFLOWS 1024
+#define K3_UDMA_DEFAULT_RING_SIZE 16
+
+/* How SRC/DST tag should be updated by UDMA in the descriptor's Word 3 */
+#define UDMA_RFLOW_SRCTAG_NONE 0
+#define UDMA_RFLOW_SRCTAG_CFG_TAG 1
+#define UDMA_RFLOW_SRCTAG_FLOW_ID 2
+#define UDMA_RFLOW_SRCTAG_SRC_TAG 4
+
+#define UDMA_RFLOW_DSTTAG_NONE 0
+#define UDMA_RFLOW_DSTTAG_CFG_TAG 1
+#define UDMA_RFLOW_DSTTAG_FLOW_ID 2
+#define UDMA_RFLOW_DSTTAG_DST_TAG_LO 4
+#define UDMA_RFLOW_DSTTAG_DST_TAG_HI 5
+
+#define UDMA_FLAG_PDMA_ACC32 BIT(0)
+#define UDMA_FLAG_PDMA_BURST BIT(1)
+#define UDMA_FLAG_TDTYPE BIT(2)
+#define UDMA_FLAG_BURST_SIZE BIT(3)
+#define UDMA_FLAGS_J7_CLASS (UDMA_FLAG_PDMA_ACC32 | \
+ UDMA_FLAG_PDMA_BURST | \
+ UDMA_FLAG_TDTYPE | \
+ UDMA_FLAG_BURST_SIZE)
+
+#define TI_UDMAC_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
+
+/* TI_SCI Params */
+#define TISCI_BCDMA_BCHAN_VALID_PARAMS ( \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_EXTENDED_CH_TYPE_VALID)
+
+#define TISCI_BCDMA_TCHAN_VALID_PARAMS ( \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID)
+
+#define TISCI_BCDMA_RCHAN_VALID_PARAMS ( \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID)
+
+#define TISCI_UDMA_TCHAN_VALID_PARAMS ( \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_EINFO_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_FILT_PSWORDS_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_TX_SUPR_TDPKT_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_ATYPE_VALID)
+
+#define TISCI_UDMA_RCHAN_VALID_PARAMS ( \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_PAUSE_ON_ERR_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_FETCH_SIZE_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CQ_QNUM_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_CHAN_TYPE_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_SHORT_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_IGNORE_LONG_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_START_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_RX_FLOWID_CNT_VALID | \
+ TI_SCI_MSG_VALUE_RM_UDMAP_CH_ATYPE_VALID)
+
struct udma_dev;
struct udma_tchan;
struct udma_rchan;
--
2.53.0
^ permalink raw reply related
* [PATCH v6 00/19] dmaengine: ti: Add support for BCDMA v2 and PKTDMA v2
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
This series adds support for the BCDMA_V2 and PKTDMA_V2 which is
introduced in AM62L.
The key differences between the existing DMA and DMA V2 are:
- Absence of TISCI: Instead of configuring via TISCI calls, direct
register writes are required.
- Autopair: There is no longer a need for PSIL pair and instead AUTOPAIR
bit needs to set in the RT_CTL register.
- Static channel mapping: Each channel is mapped to a single peripheral.
- Direct IRQs: There is no INT-A and interrupt lines from DMA are
directly connected to GIC.
- Remote side configuration handled by DMA. So no need to write to PEER
registers to START / STOP / PAUSE / TEARDOWN.
- Unified Channel Space: Tx and Rx channels share a single register
space. Each channel index is specifically fixed in hardware as either
Tx or Rx in an interleaved manner.
Full tree with device tree patches can be reviewed at:
https://github.com/sskartheekadivi/linux/tree/dma-upstream
Changes from v5 to v6:
- Switch from interrupt-map to interrupts and interrupt-names in the
dt-bindings.
- Reverse the if DMA version checks to check for v1 and else v2.
- Add new patch [01/19] before refactoring to fix sporadic crash
observed on AM62x.
link to v5:
https://lore.kernel.org/all/20260218095243.2832115-1-s-adivi@ti.com/
Changes from v4 to v5:
- Introduce a new version variable in udma_match_data to differentiate
between K3 UDMA V1 and K3 UDMA V2. This simplifies the approach for
adding any future possible variants avoiding complex if conditions.
- Fix both K3 BCDMA V2 and PKTDMA V2 dt bindings as per the comments
from previous versions.
- Fix minor nitpicks like following the reverse christmas tree order for
variable declarations.
- Remove the patch [v4 19/19] that switches to synchronous descriptor
freeing. With this patch, dma_free_coherent gets called in irq
context and hence a WARN().
link to v4:
https://lore.kernel.org/all/20260130110159.359501-1-s-adivi@ti.com/
Changes from v3 to v4:
- Rename the dt-binding files to add "ti," prefix.
- Update cell description in dt-bindings and add client examples.
- Update k3_ring_intr_regs reg names
- Rename soc specific data to bcdma_v2_data and pktdma_v2_data to
bcdma_v2_am62l_data and pktdma_v2_am62l_data.
- Add a new patch [18/19] to fix a null pointer dereference issue when
trying to reserve a channel id that is out of bounds in
udma_reserve_##res macro. Also fix logging issues in this macro.
- Add a new patch [19/19] to switch to synchronous descriptor freeing to
avoid running out of memory during stress tests.
- Fix checkpatch warnings.
link to v3:
https://lore.kernel.org/linux-arm-kernel/20250623053716.1493974-1-s-adivi@ti.com
Changes from v2 to v3:
- Fix checkpatch errors & spellings.
link to v2:
https://lore.kernel.org/linux-arm-kernel/20250612071521.3116831-1-s-adivi@ti.com
Changes from v1 to v2:
- Split refactoring of k3-udma driver into multiple commits
- Fix bcdma v2 and pktdma v2 dt-binding examples
- Fix compatibles in k3-udma-v2.c
- move udma_is_desc_really_done to k3-udma-common.c as the difference
between k3-udma and k3-udma-v2 implementation is minor.
- remove udma_ prefix to function pointers in udma_dev
- reorder the commits to first refactor the existing code completely and
then introduce k3-udma-v2 related commits.
- remove redundant includes in k3-udma-common.c
- remove ti_sci_ dependency for k3_ringacc in Kconfig
- refactor setup_resources functions to remove ti_sci_ code from common
logic.
link to v1:
https://lore.kernel.org/linux-arm-kernel/20250428072032.946008-1-s-adivi@ti.com
Sai Sree Kartheek Adivi (18):
dmaengine: ti: k3-udma: move macros to header file
dmaengine: ti: k3-udma: move structs and enums to header file
dmaengine: ti: k3-udma: move static inline helper functions to header
file
dmaengine: ti: k3-udma: move descriptor management to k3-udma-common.c
dmaengine: ti: k3-udma: move ring management functions to
k3-udma-common.c
dmaengine: ti: k3-udma: Add variant-specific function pointers to
udma_dev
dmaengine: ti: k3-udma: move udma utility functions to
k3-udma-common.c
dmaengine: ti: k3-udma: move resource management functions to
k3-udma-common.c
dmaengine: ti: k3-udma: refactor resource setup functions
dmaengine: ti: k3-udma: move inclusion of k3-udma-private.c to
k3-udma-common.c
drivers: soc: ti: k3-ringacc: handle absence of tisci
dt-bindings: dma: ti: Add K3 BCDMA V2
dt-bindings: dma: ti: Add K3 PKTDMA V2
dmaengine: ti: k3-psil-am62l: Add AM62Lx PSIL and PDMA data
dmaengine: ti: k3-udma-v2: New driver for K3 BCDMA_V2
dmaengine: ti: k3-udma-v2: Add support for PKTDMA V2
dmaengine: ti: k3-udma-v2: Update glue layer to support PKTDMA V2
dmaengine: ti: k3-udma: Validate resource ID and fix logging in
reservation
Vignesh Raghavendra (1):
dmaengine: ti: k3-udma: Fix sporadic crash on AM62x
.../bindings/dma/ti/ti,am62l-dmss-bcdma.yaml | 121 +
.../bindings/dma/ti/ti,am62l-dmss-pktdma.yaml | 101 +
drivers/dma/ti/Kconfig | 21 +-
drivers/dma/ti/Makefile | 5 +-
drivers/dma/ti/k3-psil-am62l.c | 132 +
drivers/dma/ti/k3-psil-priv.h | 1 +
drivers/dma/ti/k3-psil.c | 1 +
drivers/dma/ti/k3-udma-common.c | 2610 ++++++++++++++
drivers/dma/ti/k3-udma-glue.c | 91 +-
drivers/dma/ti/k3-udma-private.c | 37 +-
drivers/dma/ti/k3-udma-v2.c | 1467 ++++++++
drivers/dma/ti/k3-udma.c | 3104 +----------------
drivers/dma/ti/k3-udma.h | 590 ++++
drivers/soc/ti/k3-ringacc.c | 188 +-
include/linux/soc/ti/k3-ringacc.h | 20 +
15 files changed, 5449 insertions(+), 3040 deletions(-)
create mode 100644 Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml
create mode 100644 Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-pktdma.yaml
create mode 100644 drivers/dma/ti/k3-psil-am62l.c
create mode 100644 drivers/dma/ti/k3-udma-common.c
create mode 100644 drivers/dma/ti/k3-udma-v2.c
--
2.53.0
^ permalink raw reply
* [PATCH v6 05/19] dmaengine: ti: k3-udma: move descriptor management to k3-udma-common.c
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Refactor the K3 UDMA driver by moving all DMA descriptor handling
functions from k3-udma.c to a new common library, k3-udma-common.c.
This prepares the driver for supporting new K3 UDMA v2 variant
(used in AM62L) that can reuse the same descriptor handling logic.
To ensure this common code works correctly across all build
configurations (built-in vs modules), introduce a hidden Kconfig symbol:
CONFIG_TI_K3_UDMA_COMMON.
No functional changes intended.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/Kconfig | 5 +
drivers/dma/ti/Makefile | 1 +
drivers/dma/ti/k3-udma-common.c | 1243 +++++++++++++++++++++++++++++++
drivers/dma/ti/k3-udma.c | 1218 ------------------------------
drivers/dma/ti/k3-udma.h | 54 ++
5 files changed, 1303 insertions(+), 1218 deletions(-)
create mode 100644 drivers/dma/ti/k3-udma-common.c
diff --git a/drivers/dma/ti/Kconfig b/drivers/dma/ti/Kconfig
index cbc30ab627832..712e456015459 100644
--- a/drivers/dma/ti/Kconfig
+++ b/drivers/dma/ti/Kconfig
@@ -42,12 +42,17 @@ config TI_K3_UDMA
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
select SOC_TI
+ select TI_K3_UDMA_COMMON
select TI_K3_RINGACC
select TI_K3_PSIL
help
Enable support for the TI UDMA (Unified DMA) controller. This
DMA engine is used in AM65x and j721e.
+config TI_K3_UDMA_COMMON
+ tristate
+ default n
+
config TI_K3_UDMA_GLUE_LAYER
tristate "Texas Instruments UDMA Glue layer for non DMAengine users"
depends on ARCH_K3 || COMPILE_TEST
diff --git a/drivers/dma/ti/Makefile b/drivers/dma/ti/Makefile
index d376c117cecf6..3b91c02e55eaf 100644
--- a/drivers/dma/ti/Makefile
+++ b/drivers/dma/ti/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_TI_CPPI41) += cppi41.o
obj-$(CONFIG_TI_EDMA) += edma.o
obj-$(CONFIG_DMA_OMAP) += omap-dma.o
obj-$(CONFIG_TI_K3_UDMA) += k3-udma.o
+obj-$(CONFIG_TI_K3_UDMA_COMMON) += k3-udma-common.o
obj-$(CONFIG_TI_K3_UDMA_GLUE_LAYER) += k3-udma-glue.o
k3-psil-lib-objs := k3-psil.o \
k3-psil-am654.o \
diff --git a/drivers/dma/ti/k3-udma-common.c b/drivers/dma/ti/k3-udma-common.c
new file mode 100644
index 0000000000000..9cb35759c70bb
--- /dev/null
+++ b/drivers/dma/ti/k3-udma-common.c
@@ -0,0 +1,1243 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/platform_device.h>
+#include <linux/soc/ti/k3-ringacc.h>
+
+#include "k3-udma.h"
+
+struct dma_descriptor_metadata_ops metadata_ops = {
+ .attach = udma_attach_metadata,
+ .get_ptr = udma_get_metadata_ptr,
+ .set_len = udma_set_metadata_len,
+};
+
+struct udma_desc *udma_udma_desc_from_paddr(struct udma_chan *uc,
+ dma_addr_t paddr)
+{
+ struct udma_desc *d = uc->terminated_desc;
+
+ if (d) {
+ dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d,
+ d->desc_idx);
+
+ if (desc_paddr != paddr)
+ d = NULL;
+ }
+
+ if (!d) {
+ d = uc->desc;
+ if (d) {
+ dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d,
+ d->desc_idx);
+
+ if (desc_paddr != paddr)
+ d = NULL;
+ }
+ }
+
+ return d;
+}
+EXPORT_SYMBOL_GPL(udma_udma_desc_from_paddr);
+
+void udma_free_hwdesc(struct udma_chan *uc, struct udma_desc *d)
+{
+ if (uc->use_dma_pool) {
+ int i;
+
+ for (i = 0; i < d->hwdesc_count; i++) {
+ if (!d->hwdesc[i].cppi5_desc_vaddr)
+ continue;
+
+ dma_pool_free(uc->hdesc_pool,
+ d->hwdesc[i].cppi5_desc_vaddr,
+ d->hwdesc[i].cppi5_desc_paddr);
+
+ d->hwdesc[i].cppi5_desc_vaddr = NULL;
+ }
+ } else if (d->hwdesc[0].cppi5_desc_vaddr) {
+ dma_free_coherent(uc->dma_dev, d->hwdesc[0].cppi5_desc_size,
+ d->hwdesc[0].cppi5_desc_vaddr,
+ d->hwdesc[0].cppi5_desc_paddr);
+
+ d->hwdesc[0].cppi5_desc_vaddr = NULL;
+ }
+}
+
+void udma_purge_desc_work(struct work_struct *work)
+{
+ struct udma_dev *ud = container_of(work, typeof(*ud), purge_work);
+ struct virt_dma_desc *vd, *_vd;
+ unsigned long flags;
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&ud->lock, flags);
+ list_splice_tail_init(&ud->desc_to_purge, &head);
+ spin_unlock_irqrestore(&ud->lock, flags);
+
+ list_for_each_entry_safe(vd, _vd, &head, node) {
+ struct udma_chan *uc = to_udma_chan(vd->tx.chan);
+ struct udma_desc *d = to_udma_desc(&vd->tx);
+
+ udma_free_hwdesc(uc, d);
+ list_del(&vd->node);
+ kfree(d);
+ }
+
+ /* If more to purge, schedule the work again */
+ if (!list_empty(&ud->desc_to_purge))
+ schedule_work(&ud->purge_work);
+}
+EXPORT_SYMBOL_GPL(udma_purge_desc_work);
+
+void udma_desc_free(struct virt_dma_desc *vd)
+{
+ struct udma_dev *ud = to_udma_dev(vd->tx.chan->device);
+ struct udma_chan *uc = to_udma_chan(vd->tx.chan);
+ struct udma_desc *d = to_udma_desc(&vd->tx);
+ unsigned long flags;
+
+ if (uc->terminated_desc == d)
+ uc->terminated_desc = NULL;
+
+ if (uc->use_dma_pool) {
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return;
+ }
+
+ spin_lock_irqsave(&ud->lock, flags);
+ list_add_tail(&vd->node, &ud->desc_to_purge);
+ spin_unlock_irqrestore(&ud->lock, flags);
+
+ schedule_work(&ud->purge_work);
+}
+EXPORT_SYMBOL_GPL(udma_desc_free);
+
+bool udma_desc_is_rx_flush(struct udma_chan *uc, dma_addr_t addr)
+{
+ if (uc->config.dir != DMA_DEV_TO_MEM)
+ return false;
+
+ if (addr == udma_get_rx_flush_hwdesc_paddr(uc))
+ return true;
+
+ return false;
+}
+EXPORT_SYMBOL_GPL(udma_desc_is_rx_flush);
+
+bool udma_is_desc_really_done(struct udma_chan *uc, struct udma_desc *d)
+{
+ u32 peer_bcnt, bcnt;
+
+ /*
+ * Only TX towards PDMA is affected.
+ * If DMA_PREP_INTERRUPT is not set by consumer then skip the transfer
+ * completion calculation, consumer must ensure that there is no stale
+ * data in DMA fabric in this case.
+ */
+ if (uc->config.ep_type == PSIL_EP_NATIVE ||
+ uc->config.dir != DMA_MEM_TO_DEV || !(uc->config.tx_flags & DMA_PREP_INTERRUPT))
+ return true;
+
+ peer_bcnt = udma_tchanrt_read(uc, UDMA_CHAN_RT_PEER_BCNT_REG);
+ bcnt = udma_tchanrt_read(uc, UDMA_CHAN_RT_BCNT_REG);
+
+ /* Transfer is incomplete, store current residue and time stamp */
+ if (peer_bcnt < bcnt) {
+ uc->tx_drain.residue = bcnt - peer_bcnt;
+ uc->tx_drain.tstamp = ktime_get();
+ return false;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(udma_is_desc_really_done);
+
+struct udma_desc *udma_alloc_tr_desc(struct udma_chan *uc,
+ size_t tr_size, int tr_count,
+ enum dma_transfer_direction dir)
+{
+ struct udma_hwdesc *hwdesc;
+ struct cppi5_desc_hdr_t *tr_desc;
+ struct udma_desc *d;
+ u32 reload_count = 0;
+ u32 ring_id;
+
+ switch (tr_size) {
+ case 16:
+ case 32:
+ case 64:
+ case 128:
+ break;
+ default:
+ dev_err(uc->ud->dev, "Unsupported TR size of %zu\n", tr_size);
+ return NULL;
+ }
+
+ /* We have only one descriptor containing multiple TRs */
+ d = kzalloc(sizeof(*d) + sizeof(d->hwdesc[0]), GFP_NOWAIT);
+ if (!d)
+ return NULL;
+
+ d->sglen = tr_count;
+
+ d->hwdesc_count = 1;
+ hwdesc = &d->hwdesc[0];
+
+ /* Allocate memory for DMA ring descriptor */
+ if (uc->use_dma_pool) {
+ hwdesc->cppi5_desc_size = uc->config.hdesc_size;
+ hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
+ GFP_NOWAIT,
+ &hwdesc->cppi5_desc_paddr);
+ } else {
+ hwdesc->cppi5_desc_size = cppi5_trdesc_calc_size(tr_size,
+ tr_count);
+ hwdesc->cppi5_desc_size = ALIGN(hwdesc->cppi5_desc_size,
+ uc->ud->desc_align);
+ hwdesc->cppi5_desc_vaddr = dma_alloc_coherent(uc->ud->dev,
+ hwdesc->cppi5_desc_size,
+ &hwdesc->cppi5_desc_paddr,
+ GFP_NOWAIT);
+ }
+
+ if (!hwdesc->cppi5_desc_vaddr) {
+ kfree(d);
+ return NULL;
+ }
+
+ /* Start of the TR req records */
+ hwdesc->tr_req_base = hwdesc->cppi5_desc_vaddr + tr_size;
+ /* Start address of the TR response array */
+ hwdesc->tr_resp_base = hwdesc->tr_req_base + tr_size * tr_count;
+
+ tr_desc = hwdesc->cppi5_desc_vaddr;
+
+ if (uc->cyclic)
+ reload_count = CPPI5_INFO0_TRDESC_RLDCNT_INFINITE;
+
+ if (dir == DMA_DEV_TO_MEM)
+ ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
+ else
+ ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
+
+ cppi5_trdesc_init(tr_desc, tr_count, tr_size, 0, reload_count);
+ cppi5_desc_set_pktids(tr_desc, uc->id,
+ CPPI5_INFO1_DESC_FLOWID_DEFAULT);
+ cppi5_desc_set_retpolicy(tr_desc, 0, ring_id);
+
+ return d;
+}
+
+/**
+ * udma_get_tr_counters - calculate TR counters for a given length
+ * @len: Length of the transfer
+ * @align_to: Preferred alignment
+ * @tr0_cnt0: First TR icnt0
+ * @tr0_cnt1: First TR icnt1
+ * @tr1_cnt0: Second (if used) TR icnt0
+ *
+ * For len < SZ_64K only one TR is enough, tr1_cnt0 is not updated
+ * For len >= SZ_64K two TRs are used in a simple way:
+ * First TR: SZ_64K-alignment blocks (tr0_cnt0, tr0_cnt1)
+ * Second TR: the remaining length (tr1_cnt0)
+ *
+ * Returns the number of TRs the length needs (1 or 2)
+ * -EINVAL if the length can not be supported
+ */
+int udma_get_tr_counters(size_t len, unsigned long align_to,
+ u16 *tr0_cnt0, u16 *tr0_cnt1, u16 *tr1_cnt0)
+{
+ if (len < SZ_64K) {
+ *tr0_cnt0 = len;
+ *tr0_cnt1 = 1;
+
+ return 1;
+ }
+
+ if (align_to > 3)
+ align_to = 3;
+
+realign:
+ *tr0_cnt0 = SZ_64K - BIT(align_to);
+ if (len / *tr0_cnt0 >= SZ_64K) {
+ if (align_to) {
+ align_to--;
+ goto realign;
+ }
+ return -EINVAL;
+ }
+
+ *tr0_cnt1 = len / *tr0_cnt0;
+ *tr1_cnt0 = len % *tr0_cnt0;
+
+ return 2;
+}
+
+struct udma_desc *
+udma_prep_slave_sg_tr(struct udma_chan *uc, struct scatterlist *sgl,
+ unsigned int sglen, enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context)
+{
+ struct scatterlist *sgent;
+ struct udma_desc *d;
+ struct cppi5_tr_type1_t *tr_req = NULL;
+ u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
+ unsigned int i;
+ size_t tr_size;
+ int num_tr = 0;
+ int tr_idx = 0;
+ u64 asel;
+
+ /* estimate the number of TRs we will need */
+ for_each_sg(sgl, sgent, sglen, i) {
+ if (sg_dma_len(sgent) < SZ_64K)
+ num_tr++;
+ else
+ num_tr += 2;
+ }
+
+ /* Now allocate and setup the descriptor. */
+ tr_size = sizeof(struct cppi5_tr_type1_t);
+ d = udma_alloc_tr_desc(uc, tr_size, num_tr, dir);
+ if (!d)
+ return NULL;
+
+ d->sglen = sglen;
+
+ if (uc->ud->match_data->type == DMA_TYPE_UDMA)
+ asel = 0;
+ else
+ asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
+
+ tr_req = d->hwdesc[0].tr_req_base;
+ for_each_sg(sgl, sgent, sglen, i) {
+ dma_addr_t sg_addr = sg_dma_address(sgent);
+
+ num_tr = udma_get_tr_counters(sg_dma_len(sgent), __ffs(sg_addr),
+ &tr0_cnt0, &tr0_cnt1, &tr1_cnt0);
+ if (num_tr < 0) {
+ dev_err(uc->ud->dev, "size %u is not supported\n",
+ sg_dma_len(sgent));
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1, false,
+ false, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags, CPPI5_TR_CSF_SUPR_EVT);
+
+ sg_addr |= asel;
+ tr_req[tr_idx].addr = sg_addr;
+ tr_req[tr_idx].icnt0 = tr0_cnt0;
+ tr_req[tr_idx].icnt1 = tr0_cnt1;
+ tr_req[tr_idx].dim1 = tr0_cnt0;
+ tr_idx++;
+
+ if (num_tr == 2) {
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1,
+ false, false,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags,
+ CPPI5_TR_CSF_SUPR_EVT);
+
+ tr_req[tr_idx].addr = sg_addr + tr0_cnt1 * tr0_cnt0;
+ tr_req[tr_idx].icnt0 = tr1_cnt0;
+ tr_req[tr_idx].icnt1 = 1;
+ tr_req[tr_idx].dim1 = tr1_cnt0;
+ tr_idx++;
+ }
+
+ d->residue += sg_dma_len(sgent);
+ }
+
+ cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags,
+ CPPI5_TR_CSF_SUPR_EVT | CPPI5_TR_CSF_EOP);
+
+ return d;
+}
+
+struct udma_desc *
+udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl,
+ unsigned int sglen,
+ enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context)
+{
+ struct scatterlist *sgent;
+ struct cppi5_tr_type15_t *tr_req = NULL;
+ enum dma_slave_buswidth dev_width;
+ u32 csf = CPPI5_TR_CSF_SUPR_EVT;
+ u16 tr_cnt0, tr_cnt1;
+ dma_addr_t dev_addr;
+ struct udma_desc *d;
+ unsigned int i;
+ size_t tr_size, sg_len;
+ int num_tr = 0;
+ int tr_idx = 0;
+ u32 burst, trigger_size, port_window;
+ u64 asel;
+
+ if (dir == DMA_DEV_TO_MEM) {
+ dev_addr = uc->cfg.src_addr;
+ dev_width = uc->cfg.src_addr_width;
+ burst = uc->cfg.src_maxburst;
+ port_window = uc->cfg.src_port_window_size;
+ } else if (dir == DMA_MEM_TO_DEV) {
+ dev_addr = uc->cfg.dst_addr;
+ dev_width = uc->cfg.dst_addr_width;
+ burst = uc->cfg.dst_maxburst;
+ port_window = uc->cfg.dst_port_window_size;
+ } else {
+ dev_err(uc->ud->dev, "%s: bad direction?\n", __func__);
+ return NULL;
+ }
+
+ if (!burst)
+ burst = 1;
+
+ if (port_window) {
+ if (port_window != burst) {
+ dev_err(uc->ud->dev,
+ "The burst must be equal to port_window\n");
+ return NULL;
+ }
+
+ tr_cnt0 = dev_width * port_window;
+ tr_cnt1 = 1;
+ } else {
+ tr_cnt0 = dev_width;
+ tr_cnt1 = burst;
+ }
+ trigger_size = tr_cnt0 * tr_cnt1;
+
+ /* estimate the number of TRs we will need */
+ for_each_sg(sgl, sgent, sglen, i) {
+ sg_len = sg_dma_len(sgent);
+
+ if (sg_len % trigger_size) {
+ dev_err(uc->ud->dev,
+ "Not aligned SG entry (%zu for %u)\n", sg_len,
+ trigger_size);
+ return NULL;
+ }
+
+ if (sg_len / trigger_size < SZ_64K)
+ num_tr++;
+ else
+ num_tr += 2;
+ }
+
+ /* Now allocate and setup the descriptor. */
+ tr_size = sizeof(struct cppi5_tr_type15_t);
+ d = udma_alloc_tr_desc(uc, tr_size, num_tr, dir);
+ if (!d)
+ return NULL;
+
+ d->sglen = sglen;
+
+ if (uc->ud->match_data->type == DMA_TYPE_UDMA) {
+ asel = 0;
+ csf |= CPPI5_TR_CSF_EOL_ICNT0;
+ } else {
+ asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
+ dev_addr |= asel;
+ }
+
+ tr_req = d->hwdesc[0].tr_req_base;
+ for_each_sg(sgl, sgent, sglen, i) {
+ u16 tr0_cnt2, tr0_cnt3, tr1_cnt2;
+ dma_addr_t sg_addr = sg_dma_address(sgent);
+
+ sg_len = sg_dma_len(sgent);
+ num_tr = udma_get_tr_counters(sg_len / trigger_size, 0,
+ &tr0_cnt2, &tr0_cnt3, &tr1_cnt2);
+ if (num_tr < 0) {
+ dev_err(uc->ud->dev, "size %zu is not supported\n",
+ sg_len);
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15, false,
+ true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf);
+ cppi5_tr_set_trigger(&tr_req[tr_idx].flags,
+ uc->config.tr_trigger_type,
+ CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC, 0, 0);
+
+ sg_addr |= asel;
+ if (dir == DMA_DEV_TO_MEM) {
+ tr_req[tr_idx].addr = dev_addr;
+ tr_req[tr_idx].icnt0 = tr_cnt0;
+ tr_req[tr_idx].icnt1 = tr_cnt1;
+ tr_req[tr_idx].icnt2 = tr0_cnt2;
+ tr_req[tr_idx].icnt3 = tr0_cnt3;
+ tr_req[tr_idx].dim1 = (-1) * tr_cnt0;
+
+ tr_req[tr_idx].daddr = sg_addr;
+ tr_req[tr_idx].dicnt0 = tr_cnt0;
+ tr_req[tr_idx].dicnt1 = tr_cnt1;
+ tr_req[tr_idx].dicnt2 = tr0_cnt2;
+ tr_req[tr_idx].dicnt3 = tr0_cnt3;
+ tr_req[tr_idx].ddim1 = tr_cnt0;
+ tr_req[tr_idx].ddim2 = trigger_size;
+ tr_req[tr_idx].ddim3 = trigger_size * tr0_cnt2;
+ } else {
+ tr_req[tr_idx].addr = sg_addr;
+ tr_req[tr_idx].icnt0 = tr_cnt0;
+ tr_req[tr_idx].icnt1 = tr_cnt1;
+ tr_req[tr_idx].icnt2 = tr0_cnt2;
+ tr_req[tr_idx].icnt3 = tr0_cnt3;
+ tr_req[tr_idx].dim1 = tr_cnt0;
+ tr_req[tr_idx].dim2 = trigger_size;
+ tr_req[tr_idx].dim3 = trigger_size * tr0_cnt2;
+
+ tr_req[tr_idx].daddr = dev_addr;
+ tr_req[tr_idx].dicnt0 = tr_cnt0;
+ tr_req[tr_idx].dicnt1 = tr_cnt1;
+ tr_req[tr_idx].dicnt2 = tr0_cnt2;
+ tr_req[tr_idx].dicnt3 = tr0_cnt3;
+ tr_req[tr_idx].ddim1 = (-1) * tr_cnt0;
+ }
+
+ tr_idx++;
+
+ if (num_tr == 2) {
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15,
+ false, true,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf);
+ cppi5_tr_set_trigger(&tr_req[tr_idx].flags,
+ uc->config.tr_trigger_type,
+ CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC,
+ 0, 0);
+
+ sg_addr += trigger_size * tr0_cnt2 * tr0_cnt3;
+ if (dir == DMA_DEV_TO_MEM) {
+ tr_req[tr_idx].addr = dev_addr;
+ tr_req[tr_idx].icnt0 = tr_cnt0;
+ tr_req[tr_idx].icnt1 = tr_cnt1;
+ tr_req[tr_idx].icnt2 = tr1_cnt2;
+ tr_req[tr_idx].icnt3 = 1;
+ tr_req[tr_idx].dim1 = (-1) * tr_cnt0;
+
+ tr_req[tr_idx].daddr = sg_addr;
+ tr_req[tr_idx].dicnt0 = tr_cnt0;
+ tr_req[tr_idx].dicnt1 = tr_cnt1;
+ tr_req[tr_idx].dicnt2 = tr1_cnt2;
+ tr_req[tr_idx].dicnt3 = 1;
+ tr_req[tr_idx].ddim1 = tr_cnt0;
+ tr_req[tr_idx].ddim2 = trigger_size;
+ } else {
+ tr_req[tr_idx].addr = sg_addr;
+ tr_req[tr_idx].icnt0 = tr_cnt0;
+ tr_req[tr_idx].icnt1 = tr_cnt1;
+ tr_req[tr_idx].icnt2 = tr1_cnt2;
+ tr_req[tr_idx].icnt3 = 1;
+ tr_req[tr_idx].dim1 = tr_cnt0;
+ tr_req[tr_idx].dim2 = trigger_size;
+
+ tr_req[tr_idx].daddr = dev_addr;
+ tr_req[tr_idx].dicnt0 = tr_cnt0;
+ tr_req[tr_idx].dicnt1 = tr_cnt1;
+ tr_req[tr_idx].dicnt2 = tr1_cnt2;
+ tr_req[tr_idx].dicnt3 = 1;
+ tr_req[tr_idx].ddim1 = (-1) * tr_cnt0;
+ }
+ tr_idx++;
+ }
+
+ d->residue += sg_len;
+ }
+
+ cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags, csf | CPPI5_TR_CSF_EOP);
+
+ return d;
+}
+
+int udma_configure_statictr(struct udma_chan *uc, struct udma_desc *d,
+ enum dma_slave_buswidth dev_width,
+ u16 elcnt)
+{
+ if (uc->config.ep_type != PSIL_EP_PDMA_XY)
+ return 0;
+
+ /* Bus width translates to the element size (ES) */
+ switch (dev_width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ d->static_tr.elsize = 0;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ d->static_tr.elsize = 1;
+ break;
+ case DMA_SLAVE_BUSWIDTH_3_BYTES:
+ d->static_tr.elsize = 2;
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ d->static_tr.elsize = 3;
+ break;
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ d->static_tr.elsize = 4;
+ break;
+ default: /* not reached */
+ return -EINVAL;
+ }
+
+ d->static_tr.elcnt = elcnt;
+
+ if (uc->config.pkt_mode || !uc->cyclic) {
+ /*
+ * PDMA must close the packet when the channel is in packet mode.
+ * For TR mode when the channel is not cyclic we also need PDMA
+ * to close the packet otherwise the transfer will stall because
+ * PDMA holds on the data it has received from the peripheral.
+ */
+ unsigned int div = dev_width * elcnt;
+
+ if (uc->cyclic)
+ d->static_tr.bstcnt = d->residue / d->sglen / div;
+ else
+ d->static_tr.bstcnt = d->residue / div;
+ } else if (uc->ud->match_data->type == DMA_TYPE_BCDMA &&
+ uc->config.dir == DMA_DEV_TO_MEM &&
+ uc->cyclic) {
+ /*
+ * For cyclic mode with BCDMA we have to set EOP in each TR to
+ * prevent short packet errors seen on channel teardown. So the
+ * PDMA must close the packet after every TR transfer by setting
+ * burst count equal to the number of bytes transferred.
+ */
+ struct cppi5_tr_type1_t *tr_req = d->hwdesc[0].tr_req_base;
+
+ d->static_tr.bstcnt =
+ (tr_req->icnt0 * tr_req->icnt1) / dev_width;
+ } else {
+ d->static_tr.bstcnt = 0;
+ }
+
+ if (uc->config.dir == DMA_DEV_TO_MEM &&
+ d->static_tr.bstcnt > uc->ud->match_data->statictr_z_mask)
+ return -EINVAL;
+
+ return 0;
+}
+
+struct udma_desc *
+udma_prep_slave_sg_pkt(struct udma_chan *uc, struct scatterlist *sgl,
+ unsigned int sglen, enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context)
+{
+ struct scatterlist *sgent;
+ struct cppi5_host_desc_t *h_desc = NULL;
+ struct udma_desc *d;
+ u32 ring_id;
+ unsigned int i;
+ u64 asel;
+
+ d = kzalloc(struct_size(d, hwdesc, sglen), GFP_NOWAIT);
+ if (!d)
+ return NULL;
+
+ d->sglen = sglen;
+ d->hwdesc_count = sglen;
+
+ if (dir == DMA_DEV_TO_MEM)
+ ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
+ else
+ ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
+
+ if (uc->ud->match_data->type == DMA_TYPE_UDMA)
+ asel = 0;
+ else
+ asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
+
+ for_each_sg(sgl, sgent, sglen, i) {
+ struct udma_hwdesc *hwdesc = &d->hwdesc[i];
+ dma_addr_t sg_addr = sg_dma_address(sgent);
+ struct cppi5_host_desc_t *desc;
+ size_t sg_len = sg_dma_len(sgent);
+
+ hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
+ GFP_NOWAIT,
+ &hwdesc->cppi5_desc_paddr);
+ if (!hwdesc->cppi5_desc_vaddr) {
+ dev_err(uc->ud->dev,
+ "descriptor%d allocation failed\n", i);
+
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ d->residue += sg_len;
+ hwdesc->cppi5_desc_size = uc->config.hdesc_size;
+ desc = hwdesc->cppi5_desc_vaddr;
+
+ if (i == 0) {
+ cppi5_hdesc_init(desc, 0, 0);
+ /* Flow and Packed ID */
+ cppi5_desc_set_pktids(&desc->hdr, uc->id,
+ CPPI5_INFO1_DESC_FLOWID_DEFAULT);
+ cppi5_desc_set_retpolicy(&desc->hdr, 0, ring_id);
+ } else {
+ cppi5_hdesc_reset_hbdesc(desc);
+ cppi5_desc_set_retpolicy(&desc->hdr, 0, 0xffff);
+ }
+
+ /* attach the sg buffer to the descriptor */
+ sg_addr |= asel;
+ cppi5_hdesc_attach_buf(desc, sg_addr, sg_len, sg_addr, sg_len);
+
+ /* Attach link as host buffer descriptor */
+ if (h_desc)
+ cppi5_hdesc_link_hbdesc(h_desc,
+ hwdesc->cppi5_desc_paddr | asel);
+
+ if (uc->ud->match_data->type == DMA_TYPE_PKTDMA ||
+ dir == DMA_MEM_TO_DEV)
+ h_desc = desc;
+ }
+
+ if (d->residue >= SZ_4M) {
+ dev_err(uc->ud->dev,
+ "%s: Transfer size %u is over the supported 4M range\n",
+ __func__, d->residue);
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ h_desc = d->hwdesc[0].cppi5_desc_vaddr;
+ cppi5_hdesc_set_pktlen(h_desc, d->residue);
+
+ return d;
+}
+
+int udma_attach_metadata(struct dma_async_tx_descriptor *desc,
+ void *data, size_t len)
+{
+ struct udma_desc *d = to_udma_desc(desc);
+ struct udma_chan *uc = to_udma_chan(desc->chan);
+ struct cppi5_host_desc_t *h_desc;
+ u32 psd_size = len;
+ u32 flags = 0;
+
+ if (!uc->config.pkt_mode || !uc->config.metadata_size)
+ return -EOPNOTSUPP;
+
+ if (!data || len > uc->config.metadata_size)
+ return -EINVAL;
+
+ if (uc->config.needs_epib && len < CPPI5_INFO0_HDESC_EPIB_SIZE)
+ return -EINVAL;
+
+ h_desc = d->hwdesc[0].cppi5_desc_vaddr;
+ if (d->dir == DMA_MEM_TO_DEV)
+ memcpy(h_desc->epib, data, len);
+
+ if (uc->config.needs_epib)
+ psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE;
+
+ d->metadata = data;
+ d->metadata_size = len;
+ if (uc->config.needs_epib)
+ flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT;
+
+ cppi5_hdesc_update_flags(h_desc, flags);
+ cppi5_hdesc_update_psdata_size(h_desc, psd_size);
+
+ return 0;
+}
+
+void *udma_get_metadata_ptr(struct dma_async_tx_descriptor *desc,
+ size_t *payload_len, size_t *max_len)
+{
+ struct udma_desc *d = to_udma_desc(desc);
+ struct udma_chan *uc = to_udma_chan(desc->chan);
+ struct cppi5_host_desc_t *h_desc;
+
+ if (!uc->config.pkt_mode || !uc->config.metadata_size)
+ return ERR_PTR(-EOPNOTSUPP);
+
+ h_desc = d->hwdesc[0].cppi5_desc_vaddr;
+
+ *max_len = uc->config.metadata_size;
+
+ *payload_len = cppi5_hdesc_epib_present(&h_desc->hdr) ?
+ CPPI5_INFO0_HDESC_EPIB_SIZE : 0;
+ *payload_len += cppi5_hdesc_get_psdata_size(h_desc);
+
+ return h_desc->epib;
+}
+
+int udma_set_metadata_len(struct dma_async_tx_descriptor *desc,
+ size_t payload_len)
+{
+ struct udma_desc *d = to_udma_desc(desc);
+ struct udma_chan *uc = to_udma_chan(desc->chan);
+ struct cppi5_host_desc_t *h_desc;
+ u32 psd_size = payload_len;
+ u32 flags = 0;
+
+ if (!uc->config.pkt_mode || !uc->config.metadata_size)
+ return -EOPNOTSUPP;
+
+ if (payload_len > uc->config.metadata_size)
+ return -EINVAL;
+
+ if (uc->config.needs_epib && payload_len < CPPI5_INFO0_HDESC_EPIB_SIZE)
+ return -EINVAL;
+
+ h_desc = d->hwdesc[0].cppi5_desc_vaddr;
+
+ if (uc->config.needs_epib) {
+ psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE;
+ flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT;
+ }
+
+ cppi5_hdesc_update_flags(h_desc, flags);
+ cppi5_hdesc_update_psdata_size(h_desc, psd_size);
+
+ return 0;
+}
+
+struct dma_async_tx_descriptor *
+udma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
+ unsigned int sglen, enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context)
+{
+ struct udma_chan *uc = to_udma_chan(chan);
+ enum dma_slave_buswidth dev_width;
+ struct udma_desc *d;
+ u32 burst;
+
+ if (dir != uc->config.dir &&
+ (uc->config.dir == DMA_MEM_TO_MEM && !uc->config.tr_trigger_type)) {
+ dev_err(chan->device->dev,
+ "%s: chan%d is for %s, not supporting %s\n",
+ __func__, uc->id,
+ dmaengine_get_direction_text(uc->config.dir),
+ dmaengine_get_direction_text(dir));
+ return NULL;
+ }
+
+ if (dir == DMA_DEV_TO_MEM) {
+ dev_width = uc->cfg.src_addr_width;
+ burst = uc->cfg.src_maxburst;
+ } else if (dir == DMA_MEM_TO_DEV) {
+ dev_width = uc->cfg.dst_addr_width;
+ burst = uc->cfg.dst_maxburst;
+ } else {
+ dev_err(chan->device->dev, "%s: bad direction?\n", __func__);
+ return NULL;
+ }
+
+ if (!burst)
+ burst = 1;
+
+ uc->config.tx_flags = tx_flags;
+
+ if (uc->config.pkt_mode)
+ d = udma_prep_slave_sg_pkt(uc, sgl, sglen, dir, tx_flags,
+ context);
+ else if (is_slave_direction(uc->config.dir))
+ d = udma_prep_slave_sg_tr(uc, sgl, sglen, dir, tx_flags,
+ context);
+ else
+ d = udma_prep_slave_sg_triggered_tr(uc, sgl, sglen, dir,
+ tx_flags, context);
+
+ if (!d)
+ return NULL;
+
+ d->dir = dir;
+ d->desc_idx = 0;
+ d->tr_idx = 0;
+
+ /* static TR for remote PDMA */
+ if (udma_configure_statictr(uc, d, dev_width, burst)) {
+ dev_err(uc->ud->dev,
+ "%s: StaticTR Z is limited to maximum %u (%u)\n",
+ __func__, uc->ud->match_data->statictr_z_mask,
+ d->static_tr.bstcnt);
+
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ if (uc->config.metadata_size)
+ d->vd.tx.metadata_ops = &metadata_ops;
+
+ return vchan_tx_prep(&uc->vc, &d->vd, tx_flags);
+}
+EXPORT_SYMBOL_GPL(udma_prep_slave_sg);
+
+struct udma_desc *
+udma_prep_dma_cyclic_tr(struct udma_chan *uc, dma_addr_t buf_addr,
+ size_t buf_len, size_t period_len,
+ enum dma_transfer_direction dir, unsigned long flags)
+{
+ struct udma_desc *d;
+ size_t tr_size, period_addr;
+ struct cppi5_tr_type1_t *tr_req;
+ unsigned int periods = buf_len / period_len;
+ u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
+ unsigned int i;
+ int num_tr;
+ u32 period_csf = 0;
+
+ num_tr = udma_get_tr_counters(period_len, __ffs(buf_addr), &tr0_cnt0,
+ &tr0_cnt1, &tr1_cnt0);
+ if (num_tr < 0) {
+ dev_err(uc->ud->dev, "size %zu is not supported\n",
+ period_len);
+ return NULL;
+ }
+
+ /* Now allocate and setup the descriptor. */
+ tr_size = sizeof(struct cppi5_tr_type1_t);
+ d = udma_alloc_tr_desc(uc, tr_size, periods * num_tr, dir);
+ if (!d)
+ return NULL;
+
+ tr_req = d->hwdesc[0].tr_req_base;
+ if (uc->ud->match_data->type == DMA_TYPE_UDMA)
+ period_addr = buf_addr;
+ else
+ period_addr = buf_addr |
+ ((u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT);
+
+ /*
+ * For BCDMA <-> PDMA transfers, the EOP flag needs to be set on the
+ * last TR of a descriptor, to mark the packet as complete.
+ * This is required for getting the teardown completion message in case
+ * of TX, and to avoid short-packet error in case of RX.
+ *
+ * As we are in cyclic mode, we do not know which period might be the
+ * last one, so set the flag for each period.
+ */
+ if (uc->config.ep_type == PSIL_EP_PDMA_XY &&
+ uc->ud->match_data->type == DMA_TYPE_BCDMA) {
+ period_csf = CPPI5_TR_CSF_EOP;
+ }
+
+ for (i = 0; i < periods; i++) {
+ int tr_idx = i * num_tr;
+
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1, false,
+ false, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+
+ tr_req[tr_idx].addr = period_addr;
+ tr_req[tr_idx].icnt0 = tr0_cnt0;
+ tr_req[tr_idx].icnt1 = tr0_cnt1;
+ tr_req[tr_idx].dim1 = tr0_cnt0;
+
+ if (num_tr == 2) {
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags,
+ CPPI5_TR_CSF_SUPR_EVT);
+ tr_idx++;
+
+ cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1,
+ false, false,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+
+ tr_req[tr_idx].addr = period_addr + tr0_cnt1 * tr0_cnt0;
+ tr_req[tr_idx].icnt0 = tr1_cnt0;
+ tr_req[tr_idx].icnt1 = 1;
+ tr_req[tr_idx].dim1 = tr1_cnt0;
+ }
+
+ if (!(flags & DMA_PREP_INTERRUPT))
+ period_csf |= CPPI5_TR_CSF_SUPR_EVT;
+
+ if (period_csf)
+ cppi5_tr_csf_set(&tr_req[tr_idx].flags, period_csf);
+
+ period_addr += period_len;
+ }
+
+ return d;
+}
+
+struct udma_desc *
+udma_prep_dma_cyclic_pkt(struct udma_chan *uc, dma_addr_t buf_addr,
+ size_t buf_len, size_t period_len,
+ enum dma_transfer_direction dir, unsigned long flags)
+{
+ struct udma_desc *d;
+ u32 ring_id;
+ int i;
+ int periods = buf_len / period_len;
+
+ if (periods > (K3_UDMA_DEFAULT_RING_SIZE - 1))
+ return NULL;
+
+ if (period_len >= SZ_4M)
+ return NULL;
+
+ d = kzalloc(struct_size(d, hwdesc, periods), GFP_NOWAIT);
+ if (!d)
+ return NULL;
+
+ d->hwdesc_count = periods;
+
+ /* TODO: re-check this... */
+ if (dir == DMA_DEV_TO_MEM)
+ ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
+ else
+ ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
+
+ if (uc->ud->match_data->type != DMA_TYPE_UDMA)
+ buf_addr |= (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
+
+ for (i = 0; i < periods; i++) {
+ struct udma_hwdesc *hwdesc = &d->hwdesc[i];
+ dma_addr_t period_addr = buf_addr + (period_len * i);
+ struct cppi5_host_desc_t *h_desc;
+
+ hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
+ GFP_NOWAIT,
+ &hwdesc->cppi5_desc_paddr);
+ if (!hwdesc->cppi5_desc_vaddr) {
+ dev_err(uc->ud->dev,
+ "descriptor%d allocation failed\n", i);
+
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ hwdesc->cppi5_desc_size = uc->config.hdesc_size;
+ h_desc = hwdesc->cppi5_desc_vaddr;
+
+ cppi5_hdesc_init(h_desc, 0, 0);
+ cppi5_hdesc_set_pktlen(h_desc, period_len);
+
+ /* Flow and Packed ID */
+ cppi5_desc_set_pktids(&h_desc->hdr, uc->id,
+ CPPI5_INFO1_DESC_FLOWID_DEFAULT);
+ cppi5_desc_set_retpolicy(&h_desc->hdr, 0, ring_id);
+
+ /* attach each period to a new descriptor */
+ cppi5_hdesc_attach_buf(h_desc,
+ period_addr, period_len,
+ period_addr, period_len);
+ }
+
+ return d;
+}
+
+struct dma_async_tx_descriptor *
+udma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
+ size_t period_len, enum dma_transfer_direction dir,
+ unsigned long flags)
+{
+ struct udma_chan *uc = to_udma_chan(chan);
+ enum dma_slave_buswidth dev_width;
+ struct udma_desc *d;
+ u32 burst;
+
+ if (dir != uc->config.dir) {
+ dev_err(chan->device->dev,
+ "%s: chan%d is for %s, not supporting %s\n",
+ __func__, uc->id,
+ dmaengine_get_direction_text(uc->config.dir),
+ dmaengine_get_direction_text(dir));
+ return NULL;
+ }
+
+ uc->cyclic = true;
+
+ if (dir == DMA_DEV_TO_MEM) {
+ dev_width = uc->cfg.src_addr_width;
+ burst = uc->cfg.src_maxburst;
+ } else if (dir == DMA_MEM_TO_DEV) {
+ dev_width = uc->cfg.dst_addr_width;
+ burst = uc->cfg.dst_maxburst;
+ } else {
+ dev_err(uc->ud->dev, "%s: bad direction?\n", __func__);
+ return NULL;
+ }
+
+ if (!burst)
+ burst = 1;
+
+ if (uc->config.pkt_mode)
+ d = udma_prep_dma_cyclic_pkt(uc, buf_addr, buf_len, period_len,
+ dir, flags);
+ else
+ d = udma_prep_dma_cyclic_tr(uc, buf_addr, buf_len, period_len,
+ dir, flags);
+
+ if (!d)
+ return NULL;
+
+ d->sglen = buf_len / period_len;
+
+ d->dir = dir;
+ d->residue = buf_len;
+
+ /* static TR for remote PDMA */
+ if (udma_configure_statictr(uc, d, dev_width, burst)) {
+ dev_err(uc->ud->dev,
+ "%s: StaticTR Z is limited to maximum %u (%u)\n",
+ __func__, uc->ud->match_data->statictr_z_mask,
+ d->static_tr.bstcnt);
+
+ udma_free_hwdesc(uc, d);
+ kfree(d);
+ return NULL;
+ }
+
+ if (uc->config.metadata_size)
+ d->vd.tx.metadata_ops = &metadata_ops;
+
+ return vchan_tx_prep(&uc->vc, &d->vd, flags);
+}
+EXPORT_SYMBOL_GPL(udma_prep_dma_cyclic);
+
+struct dma_async_tx_descriptor *
+udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
+ size_t len, unsigned long tx_flags)
+{
+ struct udma_chan *uc = to_udma_chan(chan);
+ struct udma_desc *d;
+ struct cppi5_tr_type15_t *tr_req;
+ int num_tr;
+ size_t tr_size = sizeof(struct cppi5_tr_type15_t);
+ u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
+ u32 csf = CPPI5_TR_CSF_SUPR_EVT;
+
+ if (uc->config.dir != DMA_MEM_TO_MEM) {
+ dev_err(chan->device->dev,
+ "%s: chan%d is for %s, not supporting %s\n",
+ __func__, uc->id,
+ dmaengine_get_direction_text(uc->config.dir),
+ dmaengine_get_direction_text(DMA_MEM_TO_MEM));
+ return NULL;
+ }
+
+ num_tr = udma_get_tr_counters(len, __ffs(src | dest), &tr0_cnt0,
+ &tr0_cnt1, &tr1_cnt0);
+ if (num_tr < 0) {
+ dev_err(uc->ud->dev, "size %zu is not supported\n",
+ len);
+ return NULL;
+ }
+
+ d = udma_alloc_tr_desc(uc, tr_size, num_tr, DMA_MEM_TO_MEM);
+ if (!d)
+ return NULL;
+
+ d->dir = DMA_MEM_TO_MEM;
+ d->desc_idx = 0;
+ d->tr_idx = 0;
+ d->residue = len;
+
+ if (uc->ud->match_data->type != DMA_TYPE_UDMA) {
+ src |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT;
+ dest |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT;
+ } else {
+ csf |= CPPI5_TR_CSF_EOL_ICNT0;
+ }
+
+ tr_req = d->hwdesc[0].tr_req_base;
+
+ cppi5_tr_init(&tr_req[0].flags, CPPI5_TR_TYPE15, false, true,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[0].flags, csf);
+
+ tr_req[0].addr = src;
+ tr_req[0].icnt0 = tr0_cnt0;
+ tr_req[0].icnt1 = tr0_cnt1;
+ tr_req[0].icnt2 = 1;
+ tr_req[0].icnt3 = 1;
+ tr_req[0].dim1 = tr0_cnt0;
+
+ tr_req[0].daddr = dest;
+ tr_req[0].dicnt0 = tr0_cnt0;
+ tr_req[0].dicnt1 = tr0_cnt1;
+ tr_req[0].dicnt2 = 1;
+ tr_req[0].dicnt3 = 1;
+ tr_req[0].ddim1 = tr0_cnt0;
+
+ if (num_tr == 2) {
+ cppi5_tr_init(&tr_req[1].flags, CPPI5_TR_TYPE15, false, true,
+ CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+ cppi5_tr_csf_set(&tr_req[1].flags, csf);
+
+ tr_req[1].addr = src + tr0_cnt1 * tr0_cnt0;
+ tr_req[1].icnt0 = tr1_cnt0;
+ tr_req[1].icnt1 = 1;
+ tr_req[1].icnt2 = 1;
+ tr_req[1].icnt3 = 1;
+
+ tr_req[1].daddr = dest + tr0_cnt1 * tr0_cnt0;
+ tr_req[1].dicnt0 = tr1_cnt0;
+ tr_req[1].dicnt1 = 1;
+ tr_req[1].dicnt2 = 1;
+ tr_req[1].dicnt3 = 1;
+ }
+
+ cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, csf | CPPI5_TR_CSF_EOP);
+
+ if (uc->config.metadata_size)
+ d->vd.tx.metadata_ops = &metadata_ops;
+
+ return vchan_tx_prep(&uc->vc, &d->vd, tx_flags);
+}
+EXPORT_SYMBOL_GPL(udma_prep_dma_memcpy);
+
+void udma_desc_pre_callback(struct virt_dma_chan *vc,
+ struct virt_dma_desc *vd,
+ struct dmaengine_result *result)
+{
+ struct udma_chan *uc = to_udma_chan(&vc->chan);
+ struct udma_desc *d;
+ u8 status;
+
+ if (!vd)
+ return;
+
+ d = to_udma_desc(&vd->tx);
+
+ if (d->metadata_size)
+ udma_fetch_epib(uc, d);
+
+ if (result) {
+ void *desc_vaddr = udma_curr_cppi5_desc_vaddr(d, d->desc_idx);
+
+ if (cppi5_desc_get_type(desc_vaddr) ==
+ CPPI5_INFO0_DESC_TYPE_VAL_HOST) {
+ /* Provide residue information for the client */
+ result->residue = d->residue -
+ cppi5_hdesc_get_pktlen(desc_vaddr);
+ if (result->residue)
+ result->result = DMA_TRANS_ABORTED;
+ else
+ result->result = DMA_TRANS_NOERROR;
+ } else {
+ result->residue = 0;
+ /* Propagate TR Response errors to the client */
+ status = d->hwdesc[0].tr_resp_base->status;
+ if (status)
+ result->result = DMA_TRANS_ABORTED;
+ else
+ result->result = DMA_TRANS_NOERROR;
+ }
+ }
+}
+EXPORT_SYMBOL_GPL(udma_desc_pre_callback);
+
+MODULE_DESCRIPTION("Texas Instruments K3 UDMA Common Library");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 98e4ffc5efca9..96df0893fa095 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -131,105 +131,6 @@ static void udma_dump_chan_stdata(struct udma_chan *uc)
}
}
-static struct udma_desc *udma_udma_desc_from_paddr(struct udma_chan *uc,
- dma_addr_t paddr)
-{
- struct udma_desc *d = uc->terminated_desc;
-
- if (d) {
- dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d,
- d->desc_idx);
-
- if (desc_paddr != paddr)
- d = NULL;
- }
-
- if (!d) {
- d = uc->desc;
- if (d) {
- dma_addr_t desc_paddr = udma_curr_cppi5_desc_paddr(d,
- d->desc_idx);
-
- if (desc_paddr != paddr)
- d = NULL;
- }
- }
-
- return d;
-}
-
-static void udma_free_hwdesc(struct udma_chan *uc, struct udma_desc *d)
-{
- if (uc->use_dma_pool) {
- int i;
-
- for (i = 0; i < d->hwdesc_count; i++) {
- if (!d->hwdesc[i].cppi5_desc_vaddr)
- continue;
-
- dma_pool_free(uc->hdesc_pool,
- d->hwdesc[i].cppi5_desc_vaddr,
- d->hwdesc[i].cppi5_desc_paddr);
-
- d->hwdesc[i].cppi5_desc_vaddr = NULL;
- }
- } else if (d->hwdesc[0].cppi5_desc_vaddr) {
- dma_free_coherent(uc->dma_dev, d->hwdesc[0].cppi5_desc_size,
- d->hwdesc[0].cppi5_desc_vaddr,
- d->hwdesc[0].cppi5_desc_paddr);
-
- d->hwdesc[0].cppi5_desc_vaddr = NULL;
- }
-}
-
-static void udma_purge_desc_work(struct work_struct *work)
-{
- struct udma_dev *ud = container_of(work, typeof(*ud), purge_work);
- struct virt_dma_desc *vd, *_vd;
- unsigned long flags;
- LIST_HEAD(head);
-
- spin_lock_irqsave(&ud->lock, flags);
- list_splice_tail_init(&ud->desc_to_purge, &head);
- spin_unlock_irqrestore(&ud->lock, flags);
-
- list_for_each_entry_safe(vd, _vd, &head, node) {
- struct udma_chan *uc = to_udma_chan(vd->tx.chan);
- struct udma_desc *d = to_udma_desc(&vd->tx);
-
- udma_free_hwdesc(uc, d);
- list_del(&vd->node);
- kfree(d);
- }
-
- /* If more to purge, schedule the work again */
- if (!list_empty(&ud->desc_to_purge))
- schedule_work(&ud->purge_work);
-}
-
-static void udma_desc_free(struct virt_dma_desc *vd)
-{
- struct udma_dev *ud = to_udma_dev(vd->tx.chan->device);
- struct udma_chan *uc = to_udma_chan(vd->tx.chan);
- struct udma_desc *d = to_udma_desc(&vd->tx);
- unsigned long flags;
-
- if (uc->terminated_desc == d)
- uc->terminated_desc = NULL;
-
- if (uc->use_dma_pool) {
- udma_free_hwdesc(uc, d);
- kfree(d);
- return;
- }
-
- spin_lock_irqsave(&ud->lock, flags);
- list_add_tail(&vd->node, &ud->desc_to_purge);
- spin_unlock_irqrestore(&ud->lock, flags);
-
- schedule_work(&ud->purge_work);
-}
-
static bool udma_is_chan_running(struct udma_chan *uc)
{
u32 trt_ctl = 0;
@@ -303,17 +204,6 @@ static int udma_push_to_ring(struct udma_chan *uc, int idx)
return k3_ringacc_ring_push(ring, &paddr);
}
-static bool udma_desc_is_rx_flush(struct udma_chan *uc, dma_addr_t addr)
-{
- if (uc->config.dir != DMA_DEV_TO_MEM)
- return false;
-
- if (addr == udma_get_rx_flush_hwdesc_paddr(uc))
- return true;
-
- return false;
-}
-
static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
{
struct k3_ring *ring = NULL;
@@ -674,33 +564,6 @@ static void udma_cyclic_packet_elapsed(struct udma_chan *uc)
d->desc_idx = (d->desc_idx + 1) % d->sglen;
}
-static bool udma_is_desc_really_done(struct udma_chan *uc, struct udma_desc *d)
-{
- u32 peer_bcnt, bcnt;
-
- /*
- * Only TX towards PDMA is affected.
- * If DMA_PREP_INTERRUPT is not set by consumer then skip the transfer
- * completion calculation, consumer must ensure that there is no stale
- * data in DMA fabric in this case.
- */
- if (uc->config.ep_type == PSIL_EP_NATIVE ||
- uc->config.dir != DMA_MEM_TO_DEV || !(uc->config.tx_flags & DMA_PREP_INTERRUPT))
- return true;
-
- peer_bcnt = udma_tchanrt_read(uc, UDMA_CHAN_RT_PEER_BCNT_REG);
- bcnt = udma_tchanrt_read(uc, UDMA_CHAN_RT_BCNT_REG);
-
- /* Transfer is incomplete, store current residue and time stamp */
- if (peer_bcnt < bcnt) {
- uc->tx_drain.residue = bcnt - peer_bcnt;
- uc->tx_drain.tstamp = ktime_get();
- return false;
- }
-
- return true;
-}
-
static void udma_check_tx_completion(struct work_struct *work)
{
struct udma_chan *uc = container_of(work, typeof(*uc),
@@ -2344,1047 +2207,6 @@ static int udma_slave_config(struct dma_chan *chan,
return 0;
}
-static struct udma_desc *udma_alloc_tr_desc(struct udma_chan *uc,
- size_t tr_size, int tr_count,
- enum dma_transfer_direction dir)
-{
- struct udma_hwdesc *hwdesc;
- struct cppi5_desc_hdr_t *tr_desc;
- struct udma_desc *d;
- u32 reload_count = 0;
- u32 ring_id;
-
- switch (tr_size) {
- case 16:
- case 32:
- case 64:
- case 128:
- break;
- default:
- dev_err(uc->ud->dev, "Unsupported TR size of %zu\n", tr_size);
- return NULL;
- }
-
- /* We have only one descriptor containing multiple TRs */
- d = kzalloc(sizeof(*d) + sizeof(d->hwdesc[0]), GFP_NOWAIT);
- if (!d)
- return NULL;
-
- d->sglen = tr_count;
-
- d->hwdesc_count = 1;
- hwdesc = &d->hwdesc[0];
-
- /* Allocate memory for DMA ring descriptor */
- if (uc->use_dma_pool) {
- hwdesc->cppi5_desc_size = uc->config.hdesc_size;
- hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
- GFP_NOWAIT,
- &hwdesc->cppi5_desc_paddr);
- } else {
- hwdesc->cppi5_desc_size = cppi5_trdesc_calc_size(tr_size,
- tr_count);
- hwdesc->cppi5_desc_size = ALIGN(hwdesc->cppi5_desc_size,
- uc->ud->desc_align);
- hwdesc->cppi5_desc_vaddr = dma_alloc_coherent(uc->ud->dev,
- hwdesc->cppi5_desc_size,
- &hwdesc->cppi5_desc_paddr,
- GFP_NOWAIT);
- }
-
- if (!hwdesc->cppi5_desc_vaddr) {
- kfree(d);
- return NULL;
- }
-
- /* Start of the TR req records */
- hwdesc->tr_req_base = hwdesc->cppi5_desc_vaddr + tr_size;
- /* Start address of the TR response array */
- hwdesc->tr_resp_base = hwdesc->tr_req_base + tr_size * tr_count;
-
- tr_desc = hwdesc->cppi5_desc_vaddr;
-
- if (uc->cyclic)
- reload_count = CPPI5_INFO0_TRDESC_RLDCNT_INFINITE;
-
- if (dir == DMA_DEV_TO_MEM)
- ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
- else
- ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
-
- cppi5_trdesc_init(tr_desc, tr_count, tr_size, 0, reload_count);
- cppi5_desc_set_pktids(tr_desc, uc->id,
- CPPI5_INFO1_DESC_FLOWID_DEFAULT);
- cppi5_desc_set_retpolicy(tr_desc, 0, ring_id);
-
- return d;
-}
-
-/**
- * udma_get_tr_counters - calculate TR counters for a given length
- * @len: Length of the trasnfer
- * @align_to: Preferred alignment
- * @tr0_cnt0: First TR icnt0
- * @tr0_cnt1: First TR icnt1
- * @tr1_cnt0: Second (if used) TR icnt0
- *
- * For len < SZ_64K only one TR is enough, tr1_cnt0 is not updated
- * For len >= SZ_64K two TRs are used in a simple way:
- * First TR: SZ_64K-alignment blocks (tr0_cnt0, tr0_cnt1)
- * Second TR: the remaining length (tr1_cnt0)
- *
- * Returns the number of TRs the length needs (1 or 2)
- * -EINVAL if the length can not be supported
- */
-static int udma_get_tr_counters(size_t len, unsigned long align_to,
- u16 *tr0_cnt0, u16 *tr0_cnt1, u16 *tr1_cnt0)
-{
- if (len < SZ_64K) {
- *tr0_cnt0 = len;
- *tr0_cnt1 = 1;
-
- return 1;
- }
-
- if (align_to > 3)
- align_to = 3;
-
-realign:
- *tr0_cnt0 = SZ_64K - BIT(align_to);
- if (len / *tr0_cnt0 >= SZ_64K) {
- if (align_to) {
- align_to--;
- goto realign;
- }
- return -EINVAL;
- }
-
- *tr0_cnt1 = len / *tr0_cnt0;
- *tr1_cnt0 = len % *tr0_cnt0;
-
- return 2;
-}
-
-static struct udma_desc *
-udma_prep_slave_sg_tr(struct udma_chan *uc, struct scatterlist *sgl,
- unsigned int sglen, enum dma_transfer_direction dir,
- unsigned long tx_flags, void *context)
-{
- struct scatterlist *sgent;
- struct udma_desc *d;
- struct cppi5_tr_type1_t *tr_req = NULL;
- u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
- unsigned int i;
- size_t tr_size;
- int num_tr = 0;
- int tr_idx = 0;
- u64 asel;
-
- /* estimate the number of TRs we will need */
- for_each_sg(sgl, sgent, sglen, i) {
- if (sg_dma_len(sgent) < SZ_64K)
- num_tr++;
- else
- num_tr += 2;
- }
-
- /* Now allocate and setup the descriptor. */
- tr_size = sizeof(struct cppi5_tr_type1_t);
- d = udma_alloc_tr_desc(uc, tr_size, num_tr, dir);
- if (!d)
- return NULL;
-
- d->sglen = sglen;
-
- if (uc->ud->match_data->type == DMA_TYPE_UDMA)
- asel = 0;
- else
- asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
-
- tr_req = d->hwdesc[0].tr_req_base;
- for_each_sg(sgl, sgent, sglen, i) {
- dma_addr_t sg_addr = sg_dma_address(sgent);
-
- num_tr = udma_get_tr_counters(sg_dma_len(sgent), __ffs(sg_addr),
- &tr0_cnt0, &tr0_cnt1, &tr1_cnt0);
- if (num_tr < 0) {
- dev_err(uc->ud->dev, "size %u is not supported\n",
- sg_dma_len(sgent));
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1, false,
- false, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[tr_idx].flags, CPPI5_TR_CSF_SUPR_EVT);
-
- sg_addr |= asel;
- tr_req[tr_idx].addr = sg_addr;
- tr_req[tr_idx].icnt0 = tr0_cnt0;
- tr_req[tr_idx].icnt1 = tr0_cnt1;
- tr_req[tr_idx].dim1 = tr0_cnt0;
- tr_idx++;
-
- if (num_tr == 2) {
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1,
- false, false,
- CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[tr_idx].flags,
- CPPI5_TR_CSF_SUPR_EVT);
-
- tr_req[tr_idx].addr = sg_addr + tr0_cnt1 * tr0_cnt0;
- tr_req[tr_idx].icnt0 = tr1_cnt0;
- tr_req[tr_idx].icnt1 = 1;
- tr_req[tr_idx].dim1 = tr1_cnt0;
- tr_idx++;
- }
-
- d->residue += sg_dma_len(sgent);
- }
-
- cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags,
- CPPI5_TR_CSF_SUPR_EVT | CPPI5_TR_CSF_EOP);
-
- return d;
-}
-
-static struct udma_desc *
-udma_prep_slave_sg_triggered_tr(struct udma_chan *uc, struct scatterlist *sgl,
- unsigned int sglen,
- enum dma_transfer_direction dir,
- unsigned long tx_flags, void *context)
-{
- struct scatterlist *sgent;
- struct cppi5_tr_type15_t *tr_req = NULL;
- enum dma_slave_buswidth dev_width;
- u32 csf = CPPI5_TR_CSF_SUPR_EVT;
- u16 tr_cnt0, tr_cnt1;
- dma_addr_t dev_addr;
- struct udma_desc *d;
- unsigned int i;
- size_t tr_size, sg_len;
- int num_tr = 0;
- int tr_idx = 0;
- u32 burst, trigger_size, port_window;
- u64 asel;
-
- if (dir == DMA_DEV_TO_MEM) {
- dev_addr = uc->cfg.src_addr;
- dev_width = uc->cfg.src_addr_width;
- burst = uc->cfg.src_maxburst;
- port_window = uc->cfg.src_port_window_size;
- } else if (dir == DMA_MEM_TO_DEV) {
- dev_addr = uc->cfg.dst_addr;
- dev_width = uc->cfg.dst_addr_width;
- burst = uc->cfg.dst_maxburst;
- port_window = uc->cfg.dst_port_window_size;
- } else {
- dev_err(uc->ud->dev, "%s: bad direction?\n", __func__);
- return NULL;
- }
-
- if (!burst)
- burst = 1;
-
- if (port_window) {
- if (port_window != burst) {
- dev_err(uc->ud->dev,
- "The burst must be equal to port_window\n");
- return NULL;
- }
-
- tr_cnt0 = dev_width * port_window;
- tr_cnt1 = 1;
- } else {
- tr_cnt0 = dev_width;
- tr_cnt1 = burst;
- }
- trigger_size = tr_cnt0 * tr_cnt1;
-
- /* estimate the number of TRs we will need */
- for_each_sg(sgl, sgent, sglen, i) {
- sg_len = sg_dma_len(sgent);
-
- if (sg_len % trigger_size) {
- dev_err(uc->ud->dev,
- "Not aligned SG entry (%zu for %u)\n", sg_len,
- trigger_size);
- return NULL;
- }
-
- if (sg_len / trigger_size < SZ_64K)
- num_tr++;
- else
- num_tr += 2;
- }
-
- /* Now allocate and setup the descriptor. */
- tr_size = sizeof(struct cppi5_tr_type15_t);
- d = udma_alloc_tr_desc(uc, tr_size, num_tr, dir);
- if (!d)
- return NULL;
-
- d->sglen = sglen;
-
- if (uc->ud->match_data->type == DMA_TYPE_UDMA) {
- asel = 0;
- csf |= CPPI5_TR_CSF_EOL_ICNT0;
- } else {
- asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
- dev_addr |= asel;
- }
-
- tr_req = d->hwdesc[0].tr_req_base;
- for_each_sg(sgl, sgent, sglen, i) {
- u16 tr0_cnt2, tr0_cnt3, tr1_cnt2;
- dma_addr_t sg_addr = sg_dma_address(sgent);
-
- sg_len = sg_dma_len(sgent);
- num_tr = udma_get_tr_counters(sg_len / trigger_size, 0,
- &tr0_cnt2, &tr0_cnt3, &tr1_cnt2);
- if (num_tr < 0) {
- dev_err(uc->ud->dev, "size %zu is not supported\n",
- sg_len);
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15, false,
- true, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf);
- cppi5_tr_set_trigger(&tr_req[tr_idx].flags,
- uc->config.tr_trigger_type,
- CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC, 0, 0);
-
- sg_addr |= asel;
- if (dir == DMA_DEV_TO_MEM) {
- tr_req[tr_idx].addr = dev_addr;
- tr_req[tr_idx].icnt0 = tr_cnt0;
- tr_req[tr_idx].icnt1 = tr_cnt1;
- tr_req[tr_idx].icnt2 = tr0_cnt2;
- tr_req[tr_idx].icnt3 = tr0_cnt3;
- tr_req[tr_idx].dim1 = (-1) * tr_cnt0;
-
- tr_req[tr_idx].daddr = sg_addr;
- tr_req[tr_idx].dicnt0 = tr_cnt0;
- tr_req[tr_idx].dicnt1 = tr_cnt1;
- tr_req[tr_idx].dicnt2 = tr0_cnt2;
- tr_req[tr_idx].dicnt3 = tr0_cnt3;
- tr_req[tr_idx].ddim1 = tr_cnt0;
- tr_req[tr_idx].ddim2 = trigger_size;
- tr_req[tr_idx].ddim3 = trigger_size * tr0_cnt2;
- } else {
- tr_req[tr_idx].addr = sg_addr;
- tr_req[tr_idx].icnt0 = tr_cnt0;
- tr_req[tr_idx].icnt1 = tr_cnt1;
- tr_req[tr_idx].icnt2 = tr0_cnt2;
- tr_req[tr_idx].icnt3 = tr0_cnt3;
- tr_req[tr_idx].dim1 = tr_cnt0;
- tr_req[tr_idx].dim2 = trigger_size;
- tr_req[tr_idx].dim3 = trigger_size * tr0_cnt2;
-
- tr_req[tr_idx].daddr = dev_addr;
- tr_req[tr_idx].dicnt0 = tr_cnt0;
- tr_req[tr_idx].dicnt1 = tr_cnt1;
- tr_req[tr_idx].dicnt2 = tr0_cnt2;
- tr_req[tr_idx].dicnt3 = tr0_cnt3;
- tr_req[tr_idx].ddim1 = (-1) * tr_cnt0;
- }
-
- tr_idx++;
-
- if (num_tr == 2) {
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE15,
- false, true,
- CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[tr_idx].flags, csf);
- cppi5_tr_set_trigger(&tr_req[tr_idx].flags,
- uc->config.tr_trigger_type,
- CPPI5_TR_TRIGGER_TYPE_ICNT2_DEC,
- 0, 0);
-
- sg_addr += trigger_size * tr0_cnt2 * tr0_cnt3;
- if (dir == DMA_DEV_TO_MEM) {
- tr_req[tr_idx].addr = dev_addr;
- tr_req[tr_idx].icnt0 = tr_cnt0;
- tr_req[tr_idx].icnt1 = tr_cnt1;
- tr_req[tr_idx].icnt2 = tr1_cnt2;
- tr_req[tr_idx].icnt3 = 1;
- tr_req[tr_idx].dim1 = (-1) * tr_cnt0;
-
- tr_req[tr_idx].daddr = sg_addr;
- tr_req[tr_idx].dicnt0 = tr_cnt0;
- tr_req[tr_idx].dicnt1 = tr_cnt1;
- tr_req[tr_idx].dicnt2 = tr1_cnt2;
- tr_req[tr_idx].dicnt3 = 1;
- tr_req[tr_idx].ddim1 = tr_cnt0;
- tr_req[tr_idx].ddim2 = trigger_size;
- } else {
- tr_req[tr_idx].addr = sg_addr;
- tr_req[tr_idx].icnt0 = tr_cnt0;
- tr_req[tr_idx].icnt1 = tr_cnt1;
- tr_req[tr_idx].icnt2 = tr1_cnt2;
- tr_req[tr_idx].icnt3 = 1;
- tr_req[tr_idx].dim1 = tr_cnt0;
- tr_req[tr_idx].dim2 = trigger_size;
-
- tr_req[tr_idx].daddr = dev_addr;
- tr_req[tr_idx].dicnt0 = tr_cnt0;
- tr_req[tr_idx].dicnt1 = tr_cnt1;
- tr_req[tr_idx].dicnt2 = tr1_cnt2;
- tr_req[tr_idx].dicnt3 = 1;
- tr_req[tr_idx].ddim1 = (-1) * tr_cnt0;
- }
- tr_idx++;
- }
-
- d->residue += sg_len;
- }
-
- cppi5_tr_csf_set(&tr_req[tr_idx - 1].flags, csf | CPPI5_TR_CSF_EOP);
-
- return d;
-}
-
-static int udma_configure_statictr(struct udma_chan *uc, struct udma_desc *d,
- enum dma_slave_buswidth dev_width,
- u16 elcnt)
-{
- if (uc->config.ep_type != PSIL_EP_PDMA_XY)
- return 0;
-
- /* Bus width translates to the element size (ES) */
- switch (dev_width) {
- case DMA_SLAVE_BUSWIDTH_1_BYTE:
- d->static_tr.elsize = 0;
- break;
- case DMA_SLAVE_BUSWIDTH_2_BYTES:
- d->static_tr.elsize = 1;
- break;
- case DMA_SLAVE_BUSWIDTH_3_BYTES:
- d->static_tr.elsize = 2;
- break;
- case DMA_SLAVE_BUSWIDTH_4_BYTES:
- d->static_tr.elsize = 3;
- break;
- case DMA_SLAVE_BUSWIDTH_8_BYTES:
- d->static_tr.elsize = 4;
- break;
- default: /* not reached */
- return -EINVAL;
- }
-
- d->static_tr.elcnt = elcnt;
-
- if (uc->config.pkt_mode || !uc->cyclic) {
- /*
- * PDMA must close the packet when the channel is in packet mode.
- * For TR mode when the channel is not cyclic we also need PDMA
- * to close the packet otherwise the transfer will stall because
- * PDMA holds on the data it has received from the peripheral.
- */
- unsigned int div = dev_width * elcnt;
-
- if (uc->cyclic)
- d->static_tr.bstcnt = d->residue / d->sglen / div;
- else
- d->static_tr.bstcnt = d->residue / div;
- } else if (uc->ud->match_data->type == DMA_TYPE_BCDMA &&
- uc->config.dir == DMA_DEV_TO_MEM &&
- uc->cyclic) {
- /*
- * For cyclic mode with BCDMA we have to set EOP in each TR to
- * prevent short packet errors seen on channel teardown. So the
- * PDMA must close the packet after every TR transfer by setting
- * burst count equal to the number of bytes transferred.
- */
- struct cppi5_tr_type1_t *tr_req = d->hwdesc[0].tr_req_base;
-
- d->static_tr.bstcnt =
- (tr_req->icnt0 * tr_req->icnt1) / dev_width;
- } else {
- d->static_tr.bstcnt = 0;
- }
-
- if (uc->config.dir == DMA_DEV_TO_MEM &&
- d->static_tr.bstcnt > uc->ud->match_data->statictr_z_mask)
- return -EINVAL;
-
- return 0;
-}
-
-static struct udma_desc *
-udma_prep_slave_sg_pkt(struct udma_chan *uc, struct scatterlist *sgl,
- unsigned int sglen, enum dma_transfer_direction dir,
- unsigned long tx_flags, void *context)
-{
- struct scatterlist *sgent;
- struct cppi5_host_desc_t *h_desc = NULL;
- struct udma_desc *d;
- u32 ring_id;
- unsigned int i;
- u64 asel;
-
- d = kzalloc_flex(*d, hwdesc, sglen, GFP_NOWAIT);
- if (!d)
- return NULL;
-
- d->sglen = sglen;
- d->hwdesc_count = sglen;
-
- if (dir == DMA_DEV_TO_MEM)
- ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
- else
- ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
-
- if (uc->ud->match_data->type == DMA_TYPE_UDMA)
- asel = 0;
- else
- asel = (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
-
- for_each_sg(sgl, sgent, sglen, i) {
- struct udma_hwdesc *hwdesc = &d->hwdesc[i];
- dma_addr_t sg_addr = sg_dma_address(sgent);
- struct cppi5_host_desc_t *desc;
- size_t sg_len = sg_dma_len(sgent);
-
- hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
- GFP_NOWAIT,
- &hwdesc->cppi5_desc_paddr);
- if (!hwdesc->cppi5_desc_vaddr) {
- dev_err(uc->ud->dev,
- "descriptor%d allocation failed\n", i);
-
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- d->residue += sg_len;
- hwdesc->cppi5_desc_size = uc->config.hdesc_size;
- desc = hwdesc->cppi5_desc_vaddr;
-
- if (i == 0) {
- cppi5_hdesc_init(desc, 0, 0);
- /* Flow and Packed ID */
- cppi5_desc_set_pktids(&desc->hdr, uc->id,
- CPPI5_INFO1_DESC_FLOWID_DEFAULT);
- cppi5_desc_set_retpolicy(&desc->hdr, 0, ring_id);
- } else {
- cppi5_hdesc_reset_hbdesc(desc);
- cppi5_desc_set_retpolicy(&desc->hdr, 0, 0xffff);
- }
-
- /* attach the sg buffer to the descriptor */
- sg_addr |= asel;
- cppi5_hdesc_attach_buf(desc, sg_addr, sg_len, sg_addr, sg_len);
-
- /* Attach link as host buffer descriptor */
- if (h_desc)
- cppi5_hdesc_link_hbdesc(h_desc,
- hwdesc->cppi5_desc_paddr | asel);
-
- if (uc->ud->match_data->type == DMA_TYPE_PKTDMA ||
- dir == DMA_MEM_TO_DEV)
- h_desc = desc;
- }
-
- if (d->residue >= SZ_4M) {
- dev_err(uc->ud->dev,
- "%s: Transfer size %u is over the supported 4M range\n",
- __func__, d->residue);
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- h_desc = d->hwdesc[0].cppi5_desc_vaddr;
- cppi5_hdesc_set_pktlen(h_desc, d->residue);
-
- return d;
-}
-
-static int udma_attach_metadata(struct dma_async_tx_descriptor *desc,
- void *data, size_t len)
-{
- struct udma_desc *d = to_udma_desc(desc);
- struct udma_chan *uc = to_udma_chan(desc->chan);
- struct cppi5_host_desc_t *h_desc;
- u32 psd_size = len;
- u32 flags = 0;
-
- if (!uc->config.pkt_mode || !uc->config.metadata_size)
- return -ENOTSUPP;
-
- if (!data || len > uc->config.metadata_size)
- return -EINVAL;
-
- if (uc->config.needs_epib && len < CPPI5_INFO0_HDESC_EPIB_SIZE)
- return -EINVAL;
-
- h_desc = d->hwdesc[0].cppi5_desc_vaddr;
- if (d->dir == DMA_MEM_TO_DEV)
- memcpy(h_desc->epib, data, len);
-
- if (uc->config.needs_epib)
- psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE;
-
- d->metadata = data;
- d->metadata_size = len;
- if (uc->config.needs_epib)
- flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT;
-
- cppi5_hdesc_update_flags(h_desc, flags);
- cppi5_hdesc_update_psdata_size(h_desc, psd_size);
-
- return 0;
-}
-
-static void *udma_get_metadata_ptr(struct dma_async_tx_descriptor *desc,
- size_t *payload_len, size_t *max_len)
-{
- struct udma_desc *d = to_udma_desc(desc);
- struct udma_chan *uc = to_udma_chan(desc->chan);
- struct cppi5_host_desc_t *h_desc;
-
- if (!uc->config.pkt_mode || !uc->config.metadata_size)
- return ERR_PTR(-ENOTSUPP);
-
- h_desc = d->hwdesc[0].cppi5_desc_vaddr;
-
- *max_len = uc->config.metadata_size;
-
- *payload_len = cppi5_hdesc_epib_present(&h_desc->hdr) ?
- CPPI5_INFO0_HDESC_EPIB_SIZE : 0;
- *payload_len += cppi5_hdesc_get_psdata_size(h_desc);
-
- return h_desc->epib;
-}
-
-static int udma_set_metadata_len(struct dma_async_tx_descriptor *desc,
- size_t payload_len)
-{
- struct udma_desc *d = to_udma_desc(desc);
- struct udma_chan *uc = to_udma_chan(desc->chan);
- struct cppi5_host_desc_t *h_desc;
- u32 psd_size = payload_len;
- u32 flags = 0;
-
- if (!uc->config.pkt_mode || !uc->config.metadata_size)
- return -ENOTSUPP;
-
- if (payload_len > uc->config.metadata_size)
- return -EINVAL;
-
- if (uc->config.needs_epib && payload_len < CPPI5_INFO0_HDESC_EPIB_SIZE)
- return -EINVAL;
-
- h_desc = d->hwdesc[0].cppi5_desc_vaddr;
-
- if (uc->config.needs_epib) {
- psd_size -= CPPI5_INFO0_HDESC_EPIB_SIZE;
- flags |= CPPI5_INFO0_HDESC_EPIB_PRESENT;
- }
-
- cppi5_hdesc_update_flags(h_desc, flags);
- cppi5_hdesc_update_psdata_size(h_desc, psd_size);
-
- return 0;
-}
-
-static struct dma_descriptor_metadata_ops metadata_ops = {
- .attach = udma_attach_metadata,
- .get_ptr = udma_get_metadata_ptr,
- .set_len = udma_set_metadata_len,
-};
-
-static struct dma_async_tx_descriptor *
-udma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
- unsigned int sglen, enum dma_transfer_direction dir,
- unsigned long tx_flags, void *context)
-{
- struct udma_chan *uc = to_udma_chan(chan);
- enum dma_slave_buswidth dev_width;
- struct udma_desc *d;
- u32 burst;
-
- if (dir != uc->config.dir &&
- (uc->config.dir == DMA_MEM_TO_MEM && !uc->config.tr_trigger_type)) {
- dev_err(chan->device->dev,
- "%s: chan%d is for %s, not supporting %s\n",
- __func__, uc->id,
- dmaengine_get_direction_text(uc->config.dir),
- dmaengine_get_direction_text(dir));
- return NULL;
- }
-
- if (dir == DMA_DEV_TO_MEM) {
- dev_width = uc->cfg.src_addr_width;
- burst = uc->cfg.src_maxburst;
- } else if (dir == DMA_MEM_TO_DEV) {
- dev_width = uc->cfg.dst_addr_width;
- burst = uc->cfg.dst_maxburst;
- } else {
- dev_err(chan->device->dev, "%s: bad direction?\n", __func__);
- return NULL;
- }
-
- if (!burst)
- burst = 1;
-
- uc->config.tx_flags = tx_flags;
-
- if (uc->config.pkt_mode)
- d = udma_prep_slave_sg_pkt(uc, sgl, sglen, dir, tx_flags,
- context);
- else if (is_slave_direction(uc->config.dir))
- d = udma_prep_slave_sg_tr(uc, sgl, sglen, dir, tx_flags,
- context);
- else
- d = udma_prep_slave_sg_triggered_tr(uc, sgl, sglen, dir,
- tx_flags, context);
-
- if (!d)
- return NULL;
-
- d->dir = dir;
- d->desc_idx = 0;
- d->tr_idx = 0;
-
- /* static TR for remote PDMA */
- if (udma_configure_statictr(uc, d, dev_width, burst)) {
- dev_err(uc->ud->dev,
- "%s: StaticTR Z is limited to maximum %u (%u)\n",
- __func__, uc->ud->match_data->statictr_z_mask,
- d->static_tr.bstcnt);
-
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- if (uc->config.metadata_size)
- d->vd.tx.metadata_ops = &metadata_ops;
-
- return vchan_tx_prep(&uc->vc, &d->vd, tx_flags);
-}
-
-static struct udma_desc *
-udma_prep_dma_cyclic_tr(struct udma_chan *uc, dma_addr_t buf_addr,
- size_t buf_len, size_t period_len,
- enum dma_transfer_direction dir, unsigned long flags)
-{
- struct udma_desc *d;
- size_t tr_size, period_addr;
- struct cppi5_tr_type1_t *tr_req;
- unsigned int periods = buf_len / period_len;
- u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
- unsigned int i;
- int num_tr;
- u32 period_csf = 0;
-
- num_tr = udma_get_tr_counters(period_len, __ffs(buf_addr), &tr0_cnt0,
- &tr0_cnt1, &tr1_cnt0);
- if (num_tr < 0) {
- dev_err(uc->ud->dev, "size %zu is not supported\n",
- period_len);
- return NULL;
- }
-
- /* Now allocate and setup the descriptor. */
- tr_size = sizeof(struct cppi5_tr_type1_t);
- d = udma_alloc_tr_desc(uc, tr_size, periods * num_tr, dir);
- if (!d)
- return NULL;
-
- tr_req = d->hwdesc[0].tr_req_base;
- if (uc->ud->match_data->type == DMA_TYPE_UDMA)
- period_addr = buf_addr;
- else
- period_addr = buf_addr |
- ((u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT);
-
- /*
- * For BCDMA <-> PDMA transfers, the EOP flag needs to be set on the
- * last TR of a descriptor, to mark the packet as complete.
- * This is required for getting the teardown completion message in case
- * of TX, and to avoid short-packet error in case of RX.
- *
- * As we are in cyclic mode, we do not know which period might be the
- * last one, so set the flag for each period.
- */
- if (uc->config.ep_type == PSIL_EP_PDMA_XY &&
- uc->ud->match_data->type == DMA_TYPE_BCDMA) {
- period_csf = CPPI5_TR_CSF_EOP;
- }
-
- for (i = 0; i < periods; i++) {
- int tr_idx = i * num_tr;
-
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1, false,
- false, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
-
- tr_req[tr_idx].addr = period_addr;
- tr_req[tr_idx].icnt0 = tr0_cnt0;
- tr_req[tr_idx].icnt1 = tr0_cnt1;
- tr_req[tr_idx].dim1 = tr0_cnt0;
-
- if (num_tr == 2) {
- cppi5_tr_csf_set(&tr_req[tr_idx].flags,
- CPPI5_TR_CSF_SUPR_EVT);
- tr_idx++;
-
- cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1,
- false, false,
- CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
-
- tr_req[tr_idx].addr = period_addr + tr0_cnt1 * tr0_cnt0;
- tr_req[tr_idx].icnt0 = tr1_cnt0;
- tr_req[tr_idx].icnt1 = 1;
- tr_req[tr_idx].dim1 = tr1_cnt0;
- }
-
- if (!(flags & DMA_PREP_INTERRUPT))
- period_csf |= CPPI5_TR_CSF_SUPR_EVT;
-
- if (period_csf)
- cppi5_tr_csf_set(&tr_req[tr_idx].flags, period_csf);
-
- period_addr += period_len;
- }
-
- return d;
-}
-
-static struct udma_desc *
-udma_prep_dma_cyclic_pkt(struct udma_chan *uc, dma_addr_t buf_addr,
- size_t buf_len, size_t period_len,
- enum dma_transfer_direction dir, unsigned long flags)
-{
- struct udma_desc *d;
- u32 ring_id;
- int i;
- int periods = buf_len / period_len;
-
- if (periods > (K3_UDMA_DEFAULT_RING_SIZE - 1))
- return NULL;
-
- if (period_len >= SZ_4M)
- return NULL;
-
- d = kzalloc_flex(*d, hwdesc, periods, GFP_NOWAIT);
- if (!d)
- return NULL;
-
- d->hwdesc_count = periods;
-
- /* TODO: re-check this... */
- if (dir == DMA_DEV_TO_MEM)
- ring_id = k3_ringacc_get_ring_id(uc->rflow->r_ring);
- else
- ring_id = k3_ringacc_get_ring_id(uc->tchan->tc_ring);
-
- if (uc->ud->match_data->type != DMA_TYPE_UDMA)
- buf_addr |= (u64)uc->config.asel << K3_ADDRESS_ASEL_SHIFT;
-
- for (i = 0; i < periods; i++) {
- struct udma_hwdesc *hwdesc = &d->hwdesc[i];
- dma_addr_t period_addr = buf_addr + (period_len * i);
- struct cppi5_host_desc_t *h_desc;
-
- hwdesc->cppi5_desc_vaddr = dma_pool_zalloc(uc->hdesc_pool,
- GFP_NOWAIT,
- &hwdesc->cppi5_desc_paddr);
- if (!hwdesc->cppi5_desc_vaddr) {
- dev_err(uc->ud->dev,
- "descriptor%d allocation failed\n", i);
-
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- hwdesc->cppi5_desc_size = uc->config.hdesc_size;
- h_desc = hwdesc->cppi5_desc_vaddr;
-
- cppi5_hdesc_init(h_desc, 0, 0);
- cppi5_hdesc_set_pktlen(h_desc, period_len);
-
- /* Flow and Packed ID */
- cppi5_desc_set_pktids(&h_desc->hdr, uc->id,
- CPPI5_INFO1_DESC_FLOWID_DEFAULT);
- cppi5_desc_set_retpolicy(&h_desc->hdr, 0, ring_id);
-
- /* attach each period to a new descriptor */
- cppi5_hdesc_attach_buf(h_desc,
- period_addr, period_len,
- period_addr, period_len);
- }
-
- return d;
-}
-
-static struct dma_async_tx_descriptor *
-udma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len,
- size_t period_len, enum dma_transfer_direction dir,
- unsigned long flags)
-{
- struct udma_chan *uc = to_udma_chan(chan);
- enum dma_slave_buswidth dev_width;
- struct udma_desc *d;
- u32 burst;
-
- if (dir != uc->config.dir) {
- dev_err(chan->device->dev,
- "%s: chan%d is for %s, not supporting %s\n",
- __func__, uc->id,
- dmaengine_get_direction_text(uc->config.dir),
- dmaengine_get_direction_text(dir));
- return NULL;
- }
-
- uc->cyclic = true;
-
- if (dir == DMA_DEV_TO_MEM) {
- dev_width = uc->cfg.src_addr_width;
- burst = uc->cfg.src_maxburst;
- } else if (dir == DMA_MEM_TO_DEV) {
- dev_width = uc->cfg.dst_addr_width;
- burst = uc->cfg.dst_maxburst;
- } else {
- dev_err(uc->ud->dev, "%s: bad direction?\n", __func__);
- return NULL;
- }
-
- if (!burst)
- burst = 1;
-
- if (uc->config.pkt_mode)
- d = udma_prep_dma_cyclic_pkt(uc, buf_addr, buf_len, period_len,
- dir, flags);
- else
- d = udma_prep_dma_cyclic_tr(uc, buf_addr, buf_len, period_len,
- dir, flags);
-
- if (!d)
- return NULL;
-
- d->sglen = buf_len / period_len;
-
- d->dir = dir;
- d->residue = buf_len;
-
- /* static TR for remote PDMA */
- if (udma_configure_statictr(uc, d, dev_width, burst)) {
- dev_err(uc->ud->dev,
- "%s: StaticTR Z is limited to maximum %u (%u)\n",
- __func__, uc->ud->match_data->statictr_z_mask,
- d->static_tr.bstcnt);
-
- udma_free_hwdesc(uc, d);
- kfree(d);
- return NULL;
- }
-
- if (uc->config.metadata_size)
- d->vd.tx.metadata_ops = &metadata_ops;
-
- return vchan_tx_prep(&uc->vc, &d->vd, flags);
-}
-
-static struct dma_async_tx_descriptor *
-udma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
- size_t len, unsigned long tx_flags)
-{
- struct udma_chan *uc = to_udma_chan(chan);
- struct udma_desc *d;
- struct cppi5_tr_type15_t *tr_req;
- int num_tr;
- size_t tr_size = sizeof(struct cppi5_tr_type15_t);
- u16 tr0_cnt0, tr0_cnt1, tr1_cnt0;
- u32 csf = CPPI5_TR_CSF_SUPR_EVT;
-
- if (uc->config.dir != DMA_MEM_TO_MEM) {
- dev_err(chan->device->dev,
- "%s: chan%d is for %s, not supporting %s\n",
- __func__, uc->id,
- dmaengine_get_direction_text(uc->config.dir),
- dmaengine_get_direction_text(DMA_MEM_TO_MEM));
- return NULL;
- }
-
- num_tr = udma_get_tr_counters(len, __ffs(src | dest), &tr0_cnt0,
- &tr0_cnt1, &tr1_cnt0);
- if (num_tr < 0) {
- dev_err(uc->ud->dev, "size %zu is not supported\n",
- len);
- return NULL;
- }
-
- d = udma_alloc_tr_desc(uc, tr_size, num_tr, DMA_MEM_TO_MEM);
- if (!d)
- return NULL;
-
- d->dir = DMA_MEM_TO_MEM;
- d->desc_idx = 0;
- d->tr_idx = 0;
- d->residue = len;
-
- if (uc->ud->match_data->type != DMA_TYPE_UDMA) {
- src |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT;
- dest |= (u64)uc->ud->asel << K3_ADDRESS_ASEL_SHIFT;
- } else {
- csf |= CPPI5_TR_CSF_EOL_ICNT0;
- }
-
- tr_req = d->hwdesc[0].tr_req_base;
-
- cppi5_tr_init(&tr_req[0].flags, CPPI5_TR_TYPE15, false, true,
- CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[0].flags, csf);
-
- tr_req[0].addr = src;
- tr_req[0].icnt0 = tr0_cnt0;
- tr_req[0].icnt1 = tr0_cnt1;
- tr_req[0].icnt2 = 1;
- tr_req[0].icnt3 = 1;
- tr_req[0].dim1 = tr0_cnt0;
-
- tr_req[0].daddr = dest;
- tr_req[0].dicnt0 = tr0_cnt0;
- tr_req[0].dicnt1 = tr0_cnt1;
- tr_req[0].dicnt2 = 1;
- tr_req[0].dicnt3 = 1;
- tr_req[0].ddim1 = tr0_cnt0;
-
- if (num_tr == 2) {
- cppi5_tr_init(&tr_req[1].flags, CPPI5_TR_TYPE15, false, true,
- CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
- cppi5_tr_csf_set(&tr_req[1].flags, csf);
-
- tr_req[1].addr = src + tr0_cnt1 * tr0_cnt0;
- tr_req[1].icnt0 = tr1_cnt0;
- tr_req[1].icnt1 = 1;
- tr_req[1].icnt2 = 1;
- tr_req[1].icnt3 = 1;
-
- tr_req[1].daddr = dest + tr0_cnt1 * tr0_cnt0;
- tr_req[1].dicnt0 = tr1_cnt0;
- tr_req[1].dicnt1 = 1;
- tr_req[1].dicnt2 = 1;
- tr_req[1].dicnt3 = 1;
- }
-
- cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, csf | CPPI5_TR_CSF_EOP);
-
- if (uc->config.metadata_size)
- d->vd.tx.metadata_ops = &metadata_ops;
-
- return vchan_tx_prep(&uc->vc, &d->vd, tx_flags);
-}
-
static void udma_issue_pending(struct dma_chan *chan)
{
struct udma_chan *uc = to_udma_chan(chan);
@@ -3587,46 +2409,6 @@ static void udma_synchronize(struct dma_chan *chan)
udma_reset_rings(uc);
}
-static void udma_desc_pre_callback(struct virt_dma_chan *vc,
- struct virt_dma_desc *vd,
- struct dmaengine_result *result)
-{
- struct udma_chan *uc = to_udma_chan(&vc->chan);
- struct udma_desc *d;
- u8 status;
-
- if (!vd)
- return;
-
- d = to_udma_desc(&vd->tx);
-
- if (d->metadata_size)
- udma_fetch_epib(uc, d);
-
- if (result) {
- void *desc_vaddr = udma_curr_cppi5_desc_vaddr(d, d->desc_idx);
-
- if (cppi5_desc_get_type(desc_vaddr) ==
- CPPI5_INFO0_DESC_TYPE_VAL_HOST) {
- /* Provide residue information for the client */
- result->residue = d->residue -
- cppi5_hdesc_get_pktlen(desc_vaddr);
- if (result->residue)
- result->result = DMA_TRANS_ABORTED;
- else
- result->result = DMA_TRANS_NOERROR;
- } else {
- result->residue = 0;
- /* Propagate TR Response errors to the client */
- status = d->hwdesc[0].tr_resp_base->status;
- if (status)
- result->result = DMA_TRANS_ABORTED;
- else
- result->result = DMA_TRANS_NOERROR;
- }
- }
-}
-
/*
* This tasklet handles the completion of a DMA descriptor by
* calling its callback and freeing it.
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 3a786b3eddc67..7c807bd9e178b 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -556,6 +556,60 @@ static inline void udma_fetch_epib(struct udma_chan *uc, struct udma_desc *d)
memcpy(d->metadata, h_desc->epib, d->metadata_size);
}
+/* Common functions */
+struct udma_desc *udma_udma_desc_from_paddr(struct udma_chan *uc,
+ dma_addr_t paddr);
+void udma_free_hwdesc(struct udma_chan *uc, struct udma_desc *d);
+void udma_purge_desc_work(struct work_struct *work);
+void udma_desc_free(struct virt_dma_desc *vd);
+bool udma_desc_is_rx_flush(struct udma_chan *uc, dma_addr_t addr);
+bool udma_is_desc_really_done(struct udma_chan *uc, struct udma_desc *d);
+struct udma_desc *udma_alloc_tr_desc(struct udma_chan *uc,
+ size_t tr_size, int tr_count,
+ enum dma_transfer_direction dir);
+int udma_get_tr_counters(size_t len, unsigned long align_to,
+ u16 *tr0_cnt0, u16 *tr0_cnt1, u16 *tr1_cnt0);
+struct udma_desc *udma_prep_slave_sg_tr(struct udma_chan *uc,
+ struct scatterlist *sgl, unsigned int sglen,
+ enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context);
+struct udma_desc *udma_prep_slave_sg_triggered_tr(struct udma_chan *uc,
+ struct scatterlist *sgl, unsigned int sglen,
+ enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context);
+int udma_configure_statictr(struct udma_chan *uc, struct udma_desc *d,
+ enum dma_slave_buswidth dev_width, u16 elcnt);
+struct udma_desc *udma_prep_slave_sg_pkt(struct udma_chan *uc,
+ struct scatterlist *sgl, unsigned int sglen,
+ enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context);
+int udma_attach_metadata(struct dma_async_tx_descriptor *desc,
+ void *data, size_t len);
+void *udma_get_metadata_ptr(struct dma_async_tx_descriptor *desc,
+ size_t *payload_len, size_t *max_len);
+int udma_set_metadata_len(struct dma_async_tx_descriptor *desc,
+ size_t payload_len);
+struct dma_async_tx_descriptor *udma_prep_slave_sg(struct dma_chan *chan,
+ struct scatterlist *sgl, unsigned int sglen,
+ enum dma_transfer_direction dir,
+ unsigned long tx_flags, void *context);
+struct udma_desc *udma_prep_dma_cyclic_tr(struct udma_chan *uc,
+ dma_addr_t buf_addr, size_t buf_len, size_t period_len,
+ enum dma_transfer_direction dir, unsigned long flags);
+struct udma_desc *udma_prep_dma_cyclic_pkt(struct udma_chan *uc,
+ dma_addr_t buf_addr, size_t buf_len, size_t period_len,
+ enum dma_transfer_direction dir, unsigned long flags);
+struct dma_async_tx_descriptor *udma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr,
+ size_t buf_len, size_t period_len,
+ enum dma_transfer_direction dir,
+ unsigned long flags);
+struct dma_async_tx_descriptor *udma_prep_dma_memcpy(struct dma_chan *chan,
+ dma_addr_t dest, dma_addr_t src,
+ size_t len, unsigned long tx_flags);
+void udma_desc_pre_callback(struct virt_dma_chan *vc,
+ struct virt_dma_desc *vd,
+ struct dmaengine_result *result);
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 03/19] dmaengine: ti: k3-udma: move structs and enums to header file
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Move struct and enum definitions in k3-udma.c to k3-udma.h header file
for better separation and reuse.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma.c | 259 +-------------------------------------
drivers/dma/ti/k3-udma.h | 261 +++++++++++++++++++++++++++++++++++++++
2 files changed, 262 insertions(+), 258 deletions(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index e4ba5ce28c214..3bbad4456dd9d 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -24,8 +24,8 @@
#include <linux/workqueue.h>
#include <linux/completion.h>
#include <linux/soc/ti/k3-ringacc.h>
-#include <linux/soc/ti/ti_sci_protocol.h>
#include <linux/soc/ti/ti_sci_inta_msi.h>
+#include <linux/soc/ti/ti_sci_protocol.h>
#include <linux/dma/k3-event-router.h>
#include <linux/dma/ti-cppi5.h>
@@ -33,28 +33,6 @@
#include "k3-udma.h"
#include "k3-psil-priv.h"
-struct udma_static_tr {
- u8 elsize; /* RPSTR0 */
- u16 elcnt; /* RPSTR0 */
- u16 bstcnt; /* RPSTR1 */
-};
-
-struct udma_chan;
-
-enum k3_dma_type {
- DMA_TYPE_UDMA = 0,
- DMA_TYPE_BCDMA,
- DMA_TYPE_PKTDMA,
-};
-
-enum udma_mmr {
- MMR_GCFG = 0,
- MMR_BCHANRT,
- MMR_RCHANRT,
- MMR_TCHANRT,
- MMR_LAST,
-};
-
static const char * const mmr_names[] = {
[MMR_GCFG] = "gcfg",
[MMR_BCHANRT] = "bchanrt",
@@ -62,234 +40,6 @@ static const char * const mmr_names[] = {
[MMR_TCHANRT] = "tchanrt",
};
-struct udma_tchan {
- void __iomem *reg_rt;
-
- int id;
- struct k3_ring *t_ring; /* Transmit ring */
- struct k3_ring *tc_ring; /* Transmit Completion ring */
- int tflow_id; /* applicable only for PKTDMA */
-
-};
-
-#define udma_bchan udma_tchan
-
-struct udma_rflow {
- int id;
- struct k3_ring *fd_ring; /* Free Descriptor ring */
- struct k3_ring *r_ring; /* Receive ring */
-};
-
-struct udma_rchan {
- void __iomem *reg_rt;
-
- int id;
-};
-
-struct udma_oes_offsets {
- /* K3 UDMA Output Event Offset */
- u32 udma_rchan;
-
- /* BCDMA Output Event Offsets */
- u32 bcdma_bchan_data;
- u32 bcdma_bchan_ring;
- u32 bcdma_tchan_data;
- u32 bcdma_tchan_ring;
- u32 bcdma_rchan_data;
- u32 bcdma_rchan_ring;
-
- /* PKTDMA Output Event Offsets */
- u32 pktdma_tchan_flow;
- u32 pktdma_rchan_flow;
-};
-
-struct udma_match_data {
- enum k3_dma_type type;
- u32 psil_base;
- bool enable_memcpy_support;
- u32 flags;
- u32 statictr_z_mask;
- u8 burst_size[3];
- struct udma_soc_data *soc_data;
-};
-
-struct udma_soc_data {
- struct udma_oes_offsets oes;
- u32 bcdma_trigger_event_offset;
-};
-
-struct udma_hwdesc {
- size_t cppi5_desc_size;
- void *cppi5_desc_vaddr;
- dma_addr_t cppi5_desc_paddr;
-
- /* TR descriptor internal pointers */
- void *tr_req_base;
- struct cppi5_tr_resp_t *tr_resp_base;
-};
-
-struct udma_rx_flush {
- struct udma_hwdesc hwdescs[2];
-
- size_t buffer_size;
- void *buffer_vaddr;
- dma_addr_t buffer_paddr;
-};
-
-struct udma_tpl {
- u8 levels;
- u32 start_idx[3];
-};
-
-struct udma_dev {
- struct dma_device ddev;
- struct device *dev;
- void __iomem *mmrs[MMR_LAST];
- const struct udma_match_data *match_data;
- const struct udma_soc_data *soc_data;
-
- struct udma_tpl bchan_tpl;
- struct udma_tpl tchan_tpl;
- struct udma_tpl rchan_tpl;
-
- size_t desc_align; /* alignment to use for descriptors */
-
- struct udma_tisci_rm tisci_rm;
-
- struct k3_ringacc *ringacc;
-
- struct work_struct purge_work;
- struct list_head desc_to_purge;
- spinlock_t lock;
-
- struct udma_rx_flush rx_flush;
-
- int bchan_cnt;
- int tchan_cnt;
- int echan_cnt;
- int rchan_cnt;
- int rflow_cnt;
- int tflow_cnt;
- unsigned long *bchan_map;
- unsigned long *tchan_map;
- unsigned long *rchan_map;
- unsigned long *rflow_gp_map;
- unsigned long *rflow_gp_map_allocated;
- unsigned long *rflow_in_use;
- unsigned long *tflow_map;
-
- struct udma_bchan *bchans;
- struct udma_tchan *tchans;
- struct udma_rchan *rchans;
- struct udma_rflow *rflows;
-
- struct udma_chan *channels;
- u32 psil_base;
- u32 atype;
- u32 asel;
-};
-
-struct udma_desc {
- struct virt_dma_desc vd;
-
- bool terminated;
-
- enum dma_transfer_direction dir;
-
- struct udma_static_tr static_tr;
- u32 residue;
-
- unsigned int sglen;
- unsigned int desc_idx; /* Only used for cyclic in packet mode */
- unsigned int tr_idx;
-
- u32 metadata_size;
- void *metadata; /* pointer to provided metadata buffer (EPIP, PSdata) */
-
- unsigned int hwdesc_count;
- struct udma_hwdesc hwdesc[];
-};
-
-enum udma_chan_state {
- UDMA_CHAN_IS_IDLE = 0, /* not active, no teardown is in progress */
- UDMA_CHAN_IS_ACTIVE, /* Normal operation */
- UDMA_CHAN_IS_TERMINATING, /* channel is being terminated */
-};
-
-struct udma_tx_drain {
- struct delayed_work work;
- ktime_t tstamp;
- u32 residue;
-};
-
-struct udma_chan_config {
- bool pkt_mode; /* TR or packet */
- bool needs_epib; /* EPIB is needed for the communication or not */
- u32 psd_size; /* size of Protocol Specific Data */
- u32 metadata_size; /* (needs_epib ? 16:0) + psd_size */
- u32 hdesc_size; /* Size of a packet descriptor in packet mode */
- bool notdpkt; /* Suppress sending TDC packet */
- int remote_thread_id;
- u32 atype;
- u32 asel;
- u32 src_thread;
- u32 dst_thread;
- enum psil_endpoint_type ep_type;
- bool enable_acc32;
- bool enable_burst;
- enum udma_tp_level channel_tpl; /* Channel Throughput Level */
-
- u32 tr_trigger_type;
- unsigned long tx_flags;
-
- /* PKDMA mapped channel */
- int mapped_channel_id;
- /* PKTDMA default tflow or rflow for mapped channel */
- int default_flow_id;
-
- enum dma_transfer_direction dir;
-};
-
-struct udma_chan {
- struct virt_dma_chan vc;
- struct dma_slave_config cfg;
- struct udma_dev *ud;
- struct device *dma_dev;
- struct udma_desc *desc;
- struct udma_desc *terminated_desc;
- struct udma_static_tr static_tr;
- char *name;
-
- struct udma_bchan *bchan;
- struct udma_tchan *tchan;
- struct udma_rchan *rchan;
- struct udma_rflow *rflow;
-
- bool psil_paired;
-
- int irq_num_ring;
- int irq_num_udma;
-
- bool cyclic;
- bool paused;
-
- enum udma_chan_state state;
- struct completion teardown_completed;
-
- struct udma_tx_drain tx_drain;
-
- /* Channel configuration parameters */
- struct udma_chan_config config;
- /* Channel configuration parameters (backup) */
- struct udma_chan_config backup_config;
-
- /* dmapool for packet mode descriptors */
- bool use_dma_pool;
- struct dma_pool *hdesc_pool;
-
- u32 id;
-};
-
static inline struct udma_dev *to_udma_dev(struct dma_device *d)
{
return container_of(d, struct udma_dev, ddev);
@@ -4073,13 +3823,6 @@ static struct platform_driver udma_driver;
static struct platform_driver bcdma_driver;
static struct platform_driver pktdma_driver;
-struct udma_filter_param {
- int remote_thread_id;
- u32 atype;
- u32 asel;
- u32 tr_trigger_type;
-};
-
static bool udma_dma_filter_fn(struct dma_chan *chan, void *param)
{
struct udma_chan_config *ucc;
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 750720cd06911..37aa9ba5b4d18 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -6,7 +6,12 @@
#ifndef K3_UDMA_H_
#define K3_UDMA_H_
+#include <linux/dmaengine.h>
#include <linux/soc/ti/ti_sci_protocol.h>
+#include <linux/dma/ti-cppi5.h>
+
+#include "../virt-dma.h"
+#include "k3-psil-priv.h"
/* Global registers */
#define UDMA_REV_REG 0x0
@@ -164,6 +169,7 @@ struct udma_dev;
struct udma_tchan;
struct udma_rchan;
struct udma_rflow;
+struct udma_chan;
enum udma_rm_range {
RM_RANGE_BCHAN = 0,
@@ -186,6 +192,261 @@ struct udma_tisci_rm {
struct ti_sci_resource *rm_ranges[RM_RANGE_LAST];
};
+struct udma_static_tr {
+ u8 elsize; /* RPSTR0 */
+ u16 elcnt; /* RPSTR0 */
+ u16 bstcnt; /* RPSTR1 */
+};
+
+enum k3_dma_type {
+ DMA_TYPE_UDMA = 0,
+ DMA_TYPE_BCDMA,
+ DMA_TYPE_PKTDMA,
+};
+
+enum udma_mmr {
+ MMR_GCFG = 0,
+ MMR_BCHANRT,
+ MMR_RCHANRT,
+ MMR_TCHANRT,
+ MMR_LAST,
+};
+
+struct udma_filter_param {
+ int remote_thread_id;
+ u32 atype;
+ u32 asel;
+ u32 tr_trigger_type;
+};
+
+struct udma_tchan {
+ void __iomem *reg_rt;
+
+ int id;
+ struct k3_ring *t_ring; /* Transmit ring */
+ struct k3_ring *tc_ring; /* Transmit Completion ring */
+ int tflow_id; /* applicable only for PKTDMA */
+
+};
+
+#define udma_bchan udma_tchan
+
+struct udma_rflow {
+ int id;
+ struct k3_ring *fd_ring; /* Free Descriptor ring */
+ struct k3_ring *r_ring; /* Receive ring */
+};
+
+struct udma_rchan {
+ void __iomem *reg_rt;
+
+ int id;
+};
+
+struct udma_oes_offsets {
+ /* K3 UDMA Output Event Offset */
+ u32 udma_rchan;
+
+ /* BCDMA Output Event Offsets */
+ u32 bcdma_bchan_data;
+ u32 bcdma_bchan_ring;
+ u32 bcdma_tchan_data;
+ u32 bcdma_tchan_ring;
+ u32 bcdma_rchan_data;
+ u32 bcdma_rchan_ring;
+
+ /* PKTDMA Output Event Offsets */
+ u32 pktdma_tchan_flow;
+ u32 pktdma_rchan_flow;
+};
+
+struct udma_match_data {
+ enum k3_dma_type type;
+ u32 psil_base;
+ bool enable_memcpy_support;
+ u32 flags;
+ u32 statictr_z_mask;
+ u8 burst_size[3];
+ struct udma_soc_data *soc_data;
+};
+
+struct udma_soc_data {
+ struct udma_oes_offsets oes;
+ u32 bcdma_trigger_event_offset;
+};
+
+struct udma_hwdesc {
+ size_t cppi5_desc_size;
+ void *cppi5_desc_vaddr;
+ dma_addr_t cppi5_desc_paddr;
+
+ /* TR descriptor internal pointers */
+ void *tr_req_base;
+ struct cppi5_tr_resp_t *tr_resp_base;
+};
+
+struct udma_rx_flush {
+ struct udma_hwdesc hwdescs[2];
+
+ size_t buffer_size;
+ void *buffer_vaddr;
+ dma_addr_t buffer_paddr;
+};
+
+struct udma_tpl {
+ u8 levels;
+ u32 start_idx[3];
+};
+
+struct udma_dev {
+ struct dma_device ddev;
+ struct device *dev;
+ void __iomem *mmrs[MMR_LAST];
+ const struct udma_match_data *match_data;
+ const struct udma_soc_data *soc_data;
+
+ struct udma_tpl bchan_tpl;
+ struct udma_tpl tchan_tpl;
+ struct udma_tpl rchan_tpl;
+
+ size_t desc_align; /* alignment to use for descriptors */
+
+ struct udma_tisci_rm tisci_rm;
+
+ struct k3_ringacc *ringacc;
+
+ struct work_struct purge_work;
+ struct list_head desc_to_purge;
+ spinlock_t lock;
+
+ struct udma_rx_flush rx_flush;
+
+ int bchan_cnt;
+ int tchan_cnt;
+ int echan_cnt;
+ int rchan_cnt;
+ int rflow_cnt;
+ int tflow_cnt;
+ unsigned long *bchan_map;
+ unsigned long *tchan_map;
+ unsigned long *rchan_map;
+ unsigned long *rflow_gp_map;
+ unsigned long *rflow_gp_map_allocated;
+ unsigned long *rflow_in_use;
+ unsigned long *tflow_map;
+
+ struct udma_bchan *bchans;
+ struct udma_tchan *tchans;
+ struct udma_rchan *rchans;
+ struct udma_rflow *rflows;
+
+ struct udma_chan *channels;
+ u32 psil_base;
+ u32 atype;
+ u32 asel;
+};
+
+struct udma_desc {
+ struct virt_dma_desc vd;
+
+ bool terminated;
+
+ enum dma_transfer_direction dir;
+
+ struct udma_static_tr static_tr;
+ u32 residue;
+
+ unsigned int sglen;
+ unsigned int desc_idx; /* Only used for cyclic in packet mode */
+ unsigned int tr_idx;
+
+ u32 metadata_size;
+ void *metadata; /* pointer to provided metadata buffer (EPIP, PSdata) */
+
+ unsigned int hwdesc_count;
+ struct udma_hwdesc hwdesc[];
+};
+
+enum udma_chan_state {
+ UDMA_CHAN_IS_IDLE = 0, /* not active, no teardown is in progress */
+ UDMA_CHAN_IS_ACTIVE, /* Normal operation */
+ UDMA_CHAN_IS_TERMINATING, /* channel is being terminated */
+};
+
+struct udma_tx_drain {
+ struct delayed_work work;
+ ktime_t tstamp;
+ u32 residue;
+};
+
+struct udma_chan_config {
+ bool pkt_mode; /* TR or packet */
+ bool needs_epib; /* EPIB is needed for the communication or not */
+ u32 psd_size; /* size of Protocol Specific Data */
+ u32 metadata_size; /* (needs_epib ? 16:0) + psd_size */
+ u32 hdesc_size; /* Size of a packet descriptor in packet mode */
+ bool notdpkt; /* Suppress sending TDC packet */
+ int remote_thread_id;
+ u32 atype;
+ u32 asel;
+ u32 src_thread;
+ u32 dst_thread;
+ enum psil_endpoint_type ep_type;
+ bool enable_acc32;
+ bool enable_burst;
+ enum udma_tp_level channel_tpl; /* Channel Throughput Level */
+
+ u32 tr_trigger_type;
+ unsigned long tx_flags;
+
+ /* PKDMA mapped channel */
+ int mapped_channel_id;
+ /* PKTDMA default tflow or rflow for mapped channel */
+ int default_flow_id;
+
+ enum dma_transfer_direction dir;
+};
+
+struct udma_chan {
+ struct virt_dma_chan vc;
+ struct dma_slave_config cfg;
+ struct udma_dev *ud;
+ struct device *dma_dev;
+ struct udma_desc *desc;
+ struct udma_desc *terminated_desc;
+ struct udma_static_tr static_tr;
+ char *name;
+
+ struct udma_bchan *bchan;
+ struct udma_tchan *tchan;
+ struct udma_rchan *rchan;
+ struct udma_rflow *rflow;
+
+ bool psil_paired;
+
+ int irq_num_ring;
+ int irq_num_udma;
+
+ bool cyclic;
+ bool paused;
+
+ enum udma_chan_state state;
+ struct completion teardown_completed;
+
+ struct udma_tx_drain tx_drain;
+
+ /* Channel configuration parameters */
+ struct udma_chan_config config;
+ /* Channel configuration parameters (backup) */
+ struct udma_chan_config backup_config;
+
+ /* dmapool for packet mode descriptors */
+ bool use_dma_pool;
+ struct dma_pool *hdesc_pool;
+
+ u32 id;
+};
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 09/19] dmaengine: ti: k3-udma: move resource management functions to k3-udma-common.c
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Move functions responsible for allocation and release of udma
resources such as channels, rings and flows from k3-udma.c
to the common k3-udma-common.c file.
The implementation of these functions is largely shared between K3 UDMA
and K3 UDMA v2. This refactor improves code reuse and maintainability
across multiple variants.
No functional changes intended.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma-common.c | 442 ++++++++++++++++++++++++++++++++
drivers/dma/ti/k3-udma.c | 423 ------------------------------
drivers/dma/ti/k3-udma.h | 21 ++
3 files changed, 463 insertions(+), 423 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-common.c b/drivers/dma/ti/k3-udma-common.c
index 472eedc4663a9..882d27b3c9ee5 100644
--- a/drivers/dma/ti/k3-udma-common.c
+++ b/drivers/dma/ti/k3-udma-common.c
@@ -1891,5 +1891,447 @@ enum dmaengine_alignment udma_get_copy_align(struct udma_dev *ud)
}
EXPORT_SYMBOL_GPL(udma_get_copy_align);
+/**
+ * __udma_alloc_gp_rflow_range - alloc range of GP RX flows
+ * @ud: UDMA device
+ * @from: Start the search from this flow id number
+ * @cnt: Number of consecutive flow ids to allocate
+ *
+ * Allocate range of RX flow ids for future use, those flows can be requested
+ * only using explicit flow id number. if @from is set to -1 it will try to find
+ * first free range. if @from is positive value it will force allocation only
+ * of the specified range of flows.
+ *
+ * Returns -ENOMEM if can't find free range.
+ * -EEXIST if requested range is busy.
+ * -EINVAL if wrong input values passed.
+ * Returns flow id on success.
+ */
+int __udma_alloc_gp_rflow_range(struct udma_dev *ud, int from, int cnt)
+{
+ int start, tmp_from;
+ DECLARE_BITMAP(tmp, K3_UDMA_MAX_RFLOWS);
+
+ tmp_from = from;
+ if (tmp_from < 0)
+ tmp_from = ud->rchan_cnt;
+ /* default flows can't be allocated and accessible only by id */
+ if (tmp_from < ud->rchan_cnt)
+ return -EINVAL;
+
+ if (tmp_from + cnt > ud->rflow_cnt)
+ return -EINVAL;
+
+ bitmap_or(tmp, ud->rflow_gp_map, ud->rflow_gp_map_allocated,
+ ud->rflow_cnt);
+
+ start = bitmap_find_next_zero_area(tmp,
+ ud->rflow_cnt,
+ tmp_from, cnt, 0);
+ if (start >= ud->rflow_cnt)
+ return -ENOMEM;
+
+ if (from >= 0 && start != from)
+ return -EEXIST;
+
+ bitmap_set(ud->rflow_gp_map_allocated, start, cnt);
+ return start;
+}
+EXPORT_SYMBOL_GPL(__udma_alloc_gp_rflow_range);
+
+int __udma_free_gp_rflow_range(struct udma_dev *ud, int from, int cnt)
+{
+ if (from < ud->rchan_cnt)
+ return -EINVAL;
+ if (from + cnt > ud->rflow_cnt)
+ return -EINVAL;
+
+ bitmap_clear(ud->rflow_gp_map_allocated, from, cnt);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__udma_free_gp_rflow_range);
+
+struct udma_rflow *__udma_get_rflow(struct udma_dev *ud, int id)
+{
+ /*
+ * Attempt to request rflow by ID can be made for any rflow
+ * if not in use with assumption that caller knows what's doing.
+ * TI-SCI FW will perform additional permission check ant way, it's
+ * safe
+ */
+
+ if (id < 0 || id >= ud->rflow_cnt)
+ return ERR_PTR(-ENOENT);
+
+ if (test_bit(id, ud->rflow_in_use))
+ return ERR_PTR(-ENOENT);
+
+ if (ud->rflow_gp_map) {
+ /* GP rflow has to be allocated first */
+ if (!test_bit(id, ud->rflow_gp_map) &&
+ !test_bit(id, ud->rflow_gp_map_allocated))
+ return ERR_PTR(-EINVAL);
+ }
+
+ dev_dbg(ud->dev, "get rflow%d\n", id);
+ set_bit(id, ud->rflow_in_use);
+ return &ud->rflows[id];
+}
+EXPORT_SYMBOL_GPL(__udma_get_rflow);
+
+void __udma_put_rflow(struct udma_dev *ud, struct udma_rflow *rflow)
+{
+ if (!test_bit(rflow->id, ud->rflow_in_use)) {
+ dev_err(ud->dev, "attempt to put unused rflow%d\n", rflow->id);
+ return;
+ }
+
+ dev_dbg(ud->dev, "put rflow%d\n", rflow->id);
+ clear_bit(rflow->id, ud->rflow_in_use);
+}
+EXPORT_SYMBOL_GPL(__udma_put_rflow);
+
+#define UDMA_RESERVE_RESOURCE(res) \
+struct udma_##res *__udma_reserve_##res(struct udma_dev *ud, \
+ enum udma_tp_level tpl, \
+ int id) \
+{ \
+ if (id >= 0) { \
+ if (test_bit(id, ud->res##_map)) { \
+ dev_err(ud->dev, "res##%d is in use\n", id); \
+ return ERR_PTR(-ENOENT); \
+ } \
+ } else { \
+ int start; \
+ \
+ if (tpl >= ud->res##_tpl.levels) \
+ tpl = ud->res##_tpl.levels - 1; \
+ \
+ start = ud->res##_tpl.start_idx[tpl]; \
+ \
+ id = find_next_zero_bit(ud->res##_map, ud->res##_cnt, \
+ start); \
+ if (id == ud->res##_cnt) { \
+ return ERR_PTR(-ENOENT); \
+ } \
+ } \
+ \
+ set_bit(id, ud->res##_map); \
+ return &ud->res##s[id]; \
+}
+
+UDMA_RESERVE_RESOURCE(bchan);
+EXPORT_SYMBOL_GPL(__udma_reserve_bchan);
+UDMA_RESERVE_RESOURCE(tchan);
+EXPORT_SYMBOL_GPL(__udma_reserve_tchan);
+UDMA_RESERVE_RESOURCE(rchan);
+EXPORT_SYMBOL_GPL(__udma_reserve_rchan);
+
+int udma_get_tchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int ret;
+
+ if (uc->tchan) {
+ dev_dbg(ud->dev, "chan%d: already have tchan%d allocated\n",
+ uc->id, uc->tchan->id);
+ return 0;
+ }
+
+ /*
+ * mapped_channel_id is -1 for UDMA, BCDMA and PKTDMA unmapped channels.
+ * For PKTDMA mapped channels it is configured to a channel which must
+ * be used to service the peripheral.
+ */
+ uc->tchan = __udma_reserve_tchan(ud, uc->config.channel_tpl,
+ uc->config.mapped_channel_id);
+ if (IS_ERR(uc->tchan)) {
+ ret = PTR_ERR(uc->tchan);
+ uc->tchan = NULL;
+ return ret;
+ }
+
+ if (ud->tflow_cnt) {
+ int tflow_id;
+
+ /* Only PKTDMA have support for tx flows */
+ if (uc->config.default_flow_id >= 0)
+ tflow_id = uc->config.default_flow_id;
+ else
+ tflow_id = uc->tchan->id;
+
+ if (test_bit(tflow_id, ud->tflow_map)) {
+ dev_err(ud->dev, "tflow%d is in use\n", tflow_id);
+ clear_bit(uc->tchan->id, ud->tchan_map);
+ uc->tchan = NULL;
+ return -ENOENT;
+ }
+
+ uc->tchan->tflow_id = tflow_id;
+ set_bit(tflow_id, ud->tflow_map);
+ } else {
+ uc->tchan->tflow_id = -1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udma_get_tchan);
+
+int udma_get_rchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int ret;
+
+ if (uc->rchan) {
+ dev_dbg(ud->dev, "chan%d: already have rchan%d allocated\n",
+ uc->id, uc->rchan->id);
+ return 0;
+ }
+
+ /*
+ * mapped_channel_id is -1 for UDMA, BCDMA and PKTDMA unmapped channels.
+ * For PKTDMA mapped channels it is configured to a channel which must
+ * be used to service the peripheral.
+ */
+ uc->rchan = __udma_reserve_rchan(ud, uc->config.channel_tpl,
+ uc->config.mapped_channel_id);
+ if (IS_ERR(uc->rchan)) {
+ ret = PTR_ERR(uc->rchan);
+ uc->rchan = NULL;
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udma_get_rchan);
+
+int udma_get_chan_pair(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+ int chan_id, end;
+
+ if ((uc->tchan && uc->rchan) && uc->tchan->id == uc->rchan->id) {
+ dev_info(ud->dev, "chan%d: already have %d pair allocated\n",
+ uc->id, uc->tchan->id);
+ return 0;
+ }
+
+ if (uc->tchan) {
+ dev_err(ud->dev, "chan%d: already have tchan%d allocated\n",
+ uc->id, uc->tchan->id);
+ return -EBUSY;
+ } else if (uc->rchan) {
+ dev_err(ud->dev, "chan%d: already have rchan%d allocated\n",
+ uc->id, uc->rchan->id);
+ return -EBUSY;
+ }
+
+ /* Can be optimized, but let's have it like this for now */
+ end = min(ud->tchan_cnt, ud->rchan_cnt);
+ /*
+ * Try to use the highest TPL channel pair for MEM_TO_MEM channels
+ * Note: in UDMAP the channel TPL is symmetric between tchan and rchan
+ */
+ chan_id = ud->tchan_tpl.start_idx[ud->tchan_tpl.levels - 1];
+ for (; chan_id < end; chan_id++) {
+ if (!test_bit(chan_id, ud->tchan_map) &&
+ !test_bit(chan_id, ud->rchan_map))
+ break;
+ }
+
+ if (chan_id == end)
+ return -ENOENT;
+
+ set_bit(chan_id, ud->tchan_map);
+ set_bit(chan_id, ud->rchan_map);
+ uc->tchan = &ud->tchans[chan_id];
+ uc->rchan = &ud->rchans[chan_id];
+
+ /* UDMA does not use tx flows */
+ uc->tchan->tflow_id = -1;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udma_get_chan_pair);
+
+int udma_get_rflow(struct udma_chan *uc, int flow_id)
+{
+ struct udma_dev *ud = uc->ud;
+ int ret;
+
+ if (!uc->rchan) {
+ dev_err(ud->dev, "chan%d: does not have rchan??\n", uc->id);
+ return -EINVAL;
+ }
+
+ if (uc->rflow) {
+ dev_dbg(ud->dev, "chan%d: already have rflow%d allocated\n",
+ uc->id, uc->rflow->id);
+ return 0;
+ }
+
+ uc->rflow = __udma_get_rflow(ud, flow_id);
+ if (IS_ERR(uc->rflow)) {
+ ret = PTR_ERR(uc->rflow);
+ uc->rflow = NULL;
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udma_get_rflow);
+
+void udma_put_rchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rchan) {
+ dev_dbg(ud->dev, "chan%d: put rchan%d\n", uc->id,
+ uc->rchan->id);
+ clear_bit(uc->rchan->id, ud->rchan_map);
+ uc->rchan = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(udma_put_rchan);
+
+void udma_put_tchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->tchan) {
+ dev_dbg(ud->dev, "chan%d: put tchan%d\n", uc->id,
+ uc->tchan->id);
+ clear_bit(uc->tchan->id, ud->tchan_map);
+
+ if (uc->tchan->tflow_id >= 0)
+ clear_bit(uc->tchan->tflow_id, ud->tflow_map);
+
+ uc->tchan = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(udma_put_tchan);
+
+void udma_put_rflow(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->rflow) {
+ dev_dbg(ud->dev, "chan%d: put rflow%d\n", uc->id,
+ uc->rflow->id);
+ __udma_put_rflow(ud, uc->rflow);
+ uc->rflow = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(udma_put_rflow);
+
+void udma_free_tx_resources(struct udma_chan *uc)
+{
+ if (!uc->tchan)
+ return;
+
+ k3_ringacc_ring_free(uc->tchan->t_ring);
+ k3_ringacc_ring_free(uc->tchan->tc_ring);
+ uc->tchan->t_ring = NULL;
+ uc->tchan->tc_ring = NULL;
+
+ udma_put_tchan(uc);
+}
+EXPORT_SYMBOL_GPL(udma_free_tx_resources);
+
+void udma_free_rx_resources(struct udma_chan *uc)
+{
+ if (!uc->rchan)
+ return;
+
+ if (uc->rflow) {
+ struct udma_rflow *rflow = uc->rflow;
+
+ k3_ringacc_ring_free(rflow->fd_ring);
+ k3_ringacc_ring_free(rflow->r_ring);
+ rflow->fd_ring = NULL;
+ rflow->r_ring = NULL;
+
+ udma_put_rflow(uc);
+ }
+
+ udma_put_rchan(uc);
+}
+EXPORT_SYMBOL_GPL(udma_free_rx_resources);
+
+void udma_free_chan_resources(struct dma_chan *chan)
+{
+ struct udma_chan *uc = to_udma_chan(chan);
+ struct udma_dev *ud = to_udma_dev(chan->device);
+
+ udma_terminate_all(chan);
+ if (uc->terminated_desc) {
+ ud->reset_chan(uc, false);
+ udma_reset_rings(uc);
+ }
+
+ cancel_delayed_work_sync(&uc->tx_drain.work);
+
+ if (uc->irq_num_ring > 0) {
+ free_irq(uc->irq_num_ring, uc);
+
+ uc->irq_num_ring = 0;
+ }
+ if (uc->irq_num_udma > 0) {
+ free_irq(uc->irq_num_udma, uc);
+
+ uc->irq_num_udma = 0;
+ }
+
+ /* Release PSI-L pairing */
+ if (uc->psil_paired && ud->psil_unpair) {
+ ud->psil_unpair(ud, uc->config.src_thread,
+ uc->config.dst_thread);
+ uc->psil_paired = false;
+ }
+
+ vchan_free_chan_resources(&uc->vc);
+ tasklet_kill(&uc->vc.task);
+
+ bcdma_free_bchan_resources(uc);
+ udma_free_tx_resources(uc);
+ udma_free_rx_resources(uc);
+ udma_reset_uchan(uc);
+
+ if (uc->use_dma_pool) {
+ dma_pool_destroy(uc->hdesc_pool);
+ uc->use_dma_pool = false;
+ }
+}
+EXPORT_SYMBOL_GPL(udma_free_chan_resources);
+
+void bcdma_put_bchan(struct udma_chan *uc)
+{
+ struct udma_dev *ud = uc->ud;
+
+ if (uc->bchan) {
+ dev_dbg(ud->dev, "chan%d: put bchan%d\n", uc->id,
+ uc->bchan->id);
+ clear_bit(uc->bchan->id, ud->bchan_map);
+ uc->bchan = NULL;
+ uc->tchan = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(bcdma_put_bchan);
+
+void bcdma_free_bchan_resources(struct udma_chan *uc)
+{
+ if (!uc->bchan)
+ return;
+
+ k3_ringacc_ring_free(uc->bchan->tc_ring);
+ k3_ringacc_ring_free(uc->bchan->t_ring);
+ uc->bchan->tc_ring = NULL;
+ uc->bchan->t_ring = NULL;
+ k3_configure_chan_coherency(&uc->vc.chan, 0);
+
+ bcdma_put_bchan(uc);
+}
+EXPORT_SYMBOL_GPL(bcdma_free_bchan_resources);
+
MODULE_DESCRIPTION("Texas Instruments K3 UDMA Common Library");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 89c887bc86a34..753acf1e13fa2 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -423,135 +423,6 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data)
return IRQ_HANDLED;
}
-/**
- * __udma_alloc_gp_rflow_range - alloc range of GP RX flows
- * @ud: UDMA device
- * @from: Start the search from this flow id number
- * @cnt: Number of consecutive flow ids to allocate
- *
- * Allocate range of RX flow ids for future use, those flows can be requested
- * only using explicit flow id number. if @from is set to -1 it will try to find
- * first free range. if @from is positive value it will force allocation only
- * of the specified range of flows.
- *
- * Returns -ENOMEM if can't find free range.
- * -EEXIST if requested range is busy.
- * -EINVAL if wrong input values passed.
- * Returns flow id on success.
- */
-static int __udma_alloc_gp_rflow_range(struct udma_dev *ud, int from, int cnt)
-{
- int start, tmp_from;
- DECLARE_BITMAP(tmp, K3_UDMA_MAX_RFLOWS);
-
- tmp_from = from;
- if (tmp_from < 0)
- tmp_from = ud->rchan_cnt;
- /* default flows can't be allocated and accessible only by id */
- if (tmp_from < ud->rchan_cnt)
- return -EINVAL;
-
- if (tmp_from + cnt > ud->rflow_cnt)
- return -EINVAL;
-
- bitmap_or(tmp, ud->rflow_gp_map, ud->rflow_gp_map_allocated,
- ud->rflow_cnt);
-
- start = bitmap_find_next_zero_area(tmp,
- ud->rflow_cnt,
- tmp_from, cnt, 0);
- if (start >= ud->rflow_cnt)
- return -ENOMEM;
-
- if (from >= 0 && start != from)
- return -EEXIST;
-
- bitmap_set(ud->rflow_gp_map_allocated, start, cnt);
- return start;
-}
-
-static int __udma_free_gp_rflow_range(struct udma_dev *ud, int from, int cnt)
-{
- if (from < ud->rchan_cnt)
- return -EINVAL;
- if (from + cnt > ud->rflow_cnt)
- return -EINVAL;
-
- bitmap_clear(ud->rflow_gp_map_allocated, from, cnt);
- return 0;
-}
-
-static struct udma_rflow *__udma_get_rflow(struct udma_dev *ud, int id)
-{
- /*
- * Attempt to request rflow by ID can be made for any rflow
- * if not in use with assumption that caller knows what's doing.
- * TI-SCI FW will perform additional permission check ant way, it's
- * safe
- */
-
- if (id < 0 || id >= ud->rflow_cnt)
- return ERR_PTR(-ENOENT);
-
- if (test_bit(id, ud->rflow_in_use))
- return ERR_PTR(-ENOENT);
-
- if (ud->rflow_gp_map) {
- /* GP rflow has to be allocated first */
- if (!test_bit(id, ud->rflow_gp_map) &&
- !test_bit(id, ud->rflow_gp_map_allocated))
- return ERR_PTR(-EINVAL);
- }
-
- dev_dbg(ud->dev, "get rflow%d\n", id);
- set_bit(id, ud->rflow_in_use);
- return &ud->rflows[id];
-}
-
-static void __udma_put_rflow(struct udma_dev *ud, struct udma_rflow *rflow)
-{
- if (!test_bit(rflow->id, ud->rflow_in_use)) {
- dev_err(ud->dev, "attempt to put unused rflow%d\n", rflow->id);
- return;
- }
-
- dev_dbg(ud->dev, "put rflow%d\n", rflow->id);
- clear_bit(rflow->id, ud->rflow_in_use);
-}
-
-#define UDMA_RESERVE_RESOURCE(res) \
-static struct udma_##res *__udma_reserve_##res(struct udma_dev *ud, \
- enum udma_tp_level tpl, \
- int id) \
-{ \
- if (id >= 0) { \
- if (test_bit(id, ud->res##_map)) { \
- dev_err(ud->dev, "res##%d is in use\n", id); \
- return ERR_PTR(-ENOENT); \
- } \
- } else { \
- int start; \
- \
- if (tpl >= ud->res##_tpl.levels) \
- tpl = ud->res##_tpl.levels - 1; \
- \
- start = ud->res##_tpl.start_idx[tpl]; \
- \
- id = find_next_zero_bit(ud->res##_map, ud->res##_cnt, \
- start); \
- if (id == ud->res##_cnt) { \
- return ERR_PTR(-ENOENT); \
- } \
- } \
- \
- set_bit(id, ud->res##_map); \
- return &ud->res##s[id]; \
-}
-
-UDMA_RESERVE_RESOURCE(bchan);
-UDMA_RESERVE_RESOURCE(tchan);
-UDMA_RESERVE_RESOURCE(rchan);
-
static int bcdma_get_bchan(struct udma_chan *uc)
{
struct udma_dev *ud = uc->ud;
@@ -585,223 +456,6 @@ static int bcdma_get_bchan(struct udma_chan *uc)
return 0;
}
-static int udma_get_tchan(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
- int ret;
-
- if (uc->tchan) {
- dev_dbg(ud->dev, "chan%d: already have tchan%d allocated\n",
- uc->id, uc->tchan->id);
- return 0;
- }
-
- /*
- * mapped_channel_id is -1 for UDMA, BCDMA and PKTDMA unmapped channels.
- * For PKTDMA mapped channels it is configured to a channel which must
- * be used to service the peripheral.
- */
- uc->tchan = __udma_reserve_tchan(ud, uc->config.channel_tpl,
- uc->config.mapped_channel_id);
- if (IS_ERR(uc->tchan)) {
- ret = PTR_ERR(uc->tchan);
- uc->tchan = NULL;
- return ret;
- }
-
- if (ud->tflow_cnt) {
- int tflow_id;
-
- /* Only PKTDMA have support for tx flows */
- if (uc->config.default_flow_id >= 0)
- tflow_id = uc->config.default_flow_id;
- else
- tflow_id = uc->tchan->id;
-
- if (test_bit(tflow_id, ud->tflow_map)) {
- dev_err(ud->dev, "tflow%d is in use\n", tflow_id);
- clear_bit(uc->tchan->id, ud->tchan_map);
- uc->tchan = NULL;
- return -ENOENT;
- }
-
- uc->tchan->tflow_id = tflow_id;
- set_bit(tflow_id, ud->tflow_map);
- } else {
- uc->tchan->tflow_id = -1;
- }
-
- return 0;
-}
-
-static int udma_get_rchan(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
- int ret;
-
- if (uc->rchan) {
- dev_dbg(ud->dev, "chan%d: already have rchan%d allocated\n",
- uc->id, uc->rchan->id);
- return 0;
- }
-
- /*
- * mapped_channel_id is -1 for UDMA, BCDMA and PKTDMA unmapped channels.
- * For PKTDMA mapped channels it is configured to a channel which must
- * be used to service the peripheral.
- */
- uc->rchan = __udma_reserve_rchan(ud, uc->config.channel_tpl,
- uc->config.mapped_channel_id);
- if (IS_ERR(uc->rchan)) {
- ret = PTR_ERR(uc->rchan);
- uc->rchan = NULL;
- return ret;
- }
-
- return 0;
-}
-
-static int udma_get_chan_pair(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
- int chan_id, end;
-
- if ((uc->tchan && uc->rchan) && uc->tchan->id == uc->rchan->id) {
- dev_info(ud->dev, "chan%d: already have %d pair allocated\n",
- uc->id, uc->tchan->id);
- return 0;
- }
-
- if (uc->tchan) {
- dev_err(ud->dev, "chan%d: already have tchan%d allocated\n",
- uc->id, uc->tchan->id);
- return -EBUSY;
- } else if (uc->rchan) {
- dev_err(ud->dev, "chan%d: already have rchan%d allocated\n",
- uc->id, uc->rchan->id);
- return -EBUSY;
- }
-
- /* Can be optimized, but let's have it like this for now */
- end = min(ud->tchan_cnt, ud->rchan_cnt);
- /*
- * Try to use the highest TPL channel pair for MEM_TO_MEM channels
- * Note: in UDMAP the channel TPL is symmetric between tchan and rchan
- */
- chan_id = ud->tchan_tpl.start_idx[ud->tchan_tpl.levels - 1];
- for (; chan_id < end; chan_id++) {
- if (!test_bit(chan_id, ud->tchan_map) &&
- !test_bit(chan_id, ud->rchan_map))
- break;
- }
-
- if (chan_id == end)
- return -ENOENT;
-
- set_bit(chan_id, ud->tchan_map);
- set_bit(chan_id, ud->rchan_map);
- uc->tchan = &ud->tchans[chan_id];
- uc->rchan = &ud->rchans[chan_id];
-
- /* UDMA does not use tx flows */
- uc->tchan->tflow_id = -1;
-
- return 0;
-}
-
-static int udma_get_rflow(struct udma_chan *uc, int flow_id)
-{
- struct udma_dev *ud = uc->ud;
- int ret;
-
- if (!uc->rchan) {
- dev_err(ud->dev, "chan%d: does not have rchan??\n", uc->id);
- return -EINVAL;
- }
-
- if (uc->rflow) {
- dev_dbg(ud->dev, "chan%d: already have rflow%d allocated\n",
- uc->id, uc->rflow->id);
- return 0;
- }
-
- uc->rflow = __udma_get_rflow(ud, flow_id);
- if (IS_ERR(uc->rflow)) {
- ret = PTR_ERR(uc->rflow);
- uc->rflow = NULL;
- return ret;
- }
-
- return 0;
-}
-
-static void bcdma_put_bchan(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
-
- if (uc->bchan) {
- dev_dbg(ud->dev, "chan%d: put bchan%d\n", uc->id,
- uc->bchan->id);
- clear_bit(uc->bchan->id, ud->bchan_map);
- uc->bchan = NULL;
- uc->tchan = NULL;
- }
-}
-
-static void udma_put_rchan(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
-
- if (uc->rchan) {
- dev_dbg(ud->dev, "chan%d: put rchan%d\n", uc->id,
- uc->rchan->id);
- clear_bit(uc->rchan->id, ud->rchan_map);
- uc->rchan = NULL;
- }
-}
-
-static void udma_put_tchan(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
-
- if (uc->tchan) {
- dev_dbg(ud->dev, "chan%d: put tchan%d\n", uc->id,
- uc->tchan->id);
- clear_bit(uc->tchan->id, ud->tchan_map);
-
- if (uc->tchan->tflow_id >= 0)
- clear_bit(uc->tchan->tflow_id, ud->tflow_map);
-
- uc->tchan = NULL;
- }
-}
-
-static void udma_put_rflow(struct udma_chan *uc)
-{
- struct udma_dev *ud = uc->ud;
-
- if (uc->rflow) {
- dev_dbg(ud->dev, "chan%d: put rflow%d\n", uc->id,
- uc->rflow->id);
- __udma_put_rflow(ud, uc->rflow);
- uc->rflow = NULL;
- }
-}
-
-static void bcdma_free_bchan_resources(struct udma_chan *uc)
-{
- if (!uc->bchan)
- return;
-
- k3_ringacc_ring_free(uc->bchan->tc_ring);
- k3_ringacc_ring_free(uc->bchan->t_ring);
- uc->bchan->tc_ring = NULL;
- uc->bchan->t_ring = NULL;
- k3_configure_chan_coherency(&uc->vc.chan, 0);
-
- bcdma_put_bchan(uc);
-}
-
static int bcdma_alloc_bchan_resources(struct udma_chan *uc)
{
struct k3_ring_cfg ring_cfg;
@@ -847,19 +501,6 @@ static int bcdma_alloc_bchan_resources(struct udma_chan *uc)
return ret;
}
-static void udma_free_tx_resources(struct udma_chan *uc)
-{
- if (!uc->tchan)
- return;
-
- k3_ringacc_ring_free(uc->tchan->t_ring);
- k3_ringacc_ring_free(uc->tchan->tc_ring);
- uc->tchan->t_ring = NULL;
- uc->tchan->tc_ring = NULL;
-
- udma_put_tchan(uc);
-}
-
static int udma_alloc_tx_resources(struct udma_chan *uc)
{
struct k3_ring_cfg ring_cfg;
@@ -917,25 +558,6 @@ static int udma_alloc_tx_resources(struct udma_chan *uc)
return ret;
}
-static void udma_free_rx_resources(struct udma_chan *uc)
-{
- if (!uc->rchan)
- return;
-
- if (uc->rflow) {
- struct udma_rflow *rflow = uc->rflow;
-
- k3_ringacc_ring_free(rflow->fd_ring);
- k3_ringacc_ring_free(rflow->r_ring);
- rflow->fd_ring = NULL;
- rflow->r_ring = NULL;
-
- udma_put_rflow(uc);
- }
-
- udma_put_rchan(uc);
-}
-
static int udma_alloc_rx_resources(struct udma_chan *uc)
{
struct udma_dev *ud = uc->ud;
@@ -2024,51 +1646,6 @@ static int udma_resume(struct dma_chan *chan)
return 0;
}
-static void udma_free_chan_resources(struct dma_chan *chan)
-{
- struct udma_chan *uc = to_udma_chan(chan);
- struct udma_dev *ud = to_udma_dev(chan->device);
-
- udma_terminate_all(chan);
- if (uc->terminated_desc) {
- ud->reset_chan(uc, false);
- udma_reset_rings(uc);
- }
-
- cancel_delayed_work_sync(&uc->tx_drain.work);
-
- if (uc->irq_num_ring > 0) {
- free_irq(uc->irq_num_ring, uc);
-
- uc->irq_num_ring = 0;
- }
- if (uc->irq_num_udma > 0) {
- free_irq(uc->irq_num_udma, uc);
-
- uc->irq_num_udma = 0;
- }
-
- /* Release PSI-L pairing */
- if (uc->psil_paired) {
- navss_psil_unpair(ud, uc->config.src_thread,
- uc->config.dst_thread);
- uc->psil_paired = false;
- }
-
- vchan_free_chan_resources(&uc->vc);
- tasklet_kill(&uc->vc.task);
-
- bcdma_free_bchan_resources(uc);
- udma_free_tx_resources(uc);
- udma_free_rx_resources(uc);
- udma_reset_uchan(uc);
-
- if (uc->use_dma_pool) {
- dma_pool_destroy(uc->hdesc_pool);
- uc->use_dma_pool = false;
- }
-}
-
static struct platform_driver udma_driver;
static struct platform_driver bcdma_driver;
static struct platform_driver pktdma_driver;
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 797e8b0c5b85e..e4b512d9ffb2e 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -654,6 +654,27 @@ void udma_dbg_summary_show(struct seq_file *s,
struct dma_device *dma_dev);
#endif /* CONFIG_DEBUG_FS */
+int __udma_alloc_gp_rflow_range(struct udma_dev *ud, int from, int cnt);
+int __udma_free_gp_rflow_range(struct udma_dev *ud, int from, int cnt);
+struct udma_rflow *__udma_get_rflow(struct udma_dev *ud, int id);
+void __udma_put_rflow(struct udma_dev *ud, struct udma_rflow *rflow);
+int udma_get_tchan(struct udma_chan *uc);
+int udma_get_rchan(struct udma_chan *uc);
+int udma_get_chan_pair(struct udma_chan *uc);
+int udma_get_rflow(struct udma_chan *uc, int flow_id);
+void udma_put_rchan(struct udma_chan *uc);
+void udma_put_tchan(struct udma_chan *uc);
+void udma_put_rflow(struct udma_chan *uc);
+void udma_free_tx_resources(struct udma_chan *uc);
+void udma_free_rx_resources(struct udma_chan *uc);
+void udma_free_chan_resources(struct dma_chan *chan);
+void bcdma_put_bchan(struct udma_chan *uc);
+void bcdma_free_bchan_resources(struct udma_chan *uc);
+
+struct udma_bchan *__udma_reserve_bchan(struct udma_dev *ud, enum udma_tp_level tpl, int id);
+struct udma_tchan *__udma_reserve_tchan(struct udma_dev *ud, enum udma_tp_level tpl, int id);
+struct udma_rchan *__udma_reserve_rchan(struct udma_dev *ud, enum udma_tp_level tpl, int id);
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 04/19] dmaengine: ti: k3-udma: move static inline helper functions to header file
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Move static inline helper functions in k3-udma.c to k3-udma.h header
file for better separation and reuse.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma.c | 108 --------------------------------------
drivers/dma/ti/k3-udma.h | 109 +++++++++++++++++++++++++++++++++++++++
2 files changed, 109 insertions(+), 108 deletions(-)
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 3bbad4456dd9d..98e4ffc5efca9 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -40,91 +40,6 @@ static const char * const mmr_names[] = {
[MMR_TCHANRT] = "tchanrt",
};
-static inline struct udma_dev *to_udma_dev(struct dma_device *d)
-{
- return container_of(d, struct udma_dev, ddev);
-}
-
-static inline struct udma_chan *to_udma_chan(struct dma_chan *c)
-{
- return container_of(c, struct udma_chan, vc.chan);
-}
-
-static inline struct udma_desc *to_udma_desc(struct dma_async_tx_descriptor *t)
-{
- return container_of(t, struct udma_desc, vd.tx);
-}
-
-/* Generic register access functions */
-static inline u32 udma_read(void __iomem *base, int reg)
-{
- return readl(base + reg);
-}
-
-static inline void udma_write(void __iomem *base, int reg, u32 val)
-{
- writel(val, base + reg);
-}
-
-static inline void udma_update_bits(void __iomem *base, int reg,
- u32 mask, u32 val)
-{
- u32 tmp, orig;
-
- orig = readl(base + reg);
- tmp = orig & ~mask;
- tmp |= (val & mask);
-
- if (tmp != orig)
- writel(tmp, base + reg);
-}
-
-/* TCHANRT */
-static inline u32 udma_tchanrt_read(struct udma_chan *uc, int reg)
-{
- if (!uc->tchan)
- return 0;
- return udma_read(uc->tchan->reg_rt, reg);
-}
-
-static inline void udma_tchanrt_write(struct udma_chan *uc, int reg, u32 val)
-{
- if (!uc->tchan)
- return;
- udma_write(uc->tchan->reg_rt, reg, val);
-}
-
-static inline void udma_tchanrt_update_bits(struct udma_chan *uc, int reg,
- u32 mask, u32 val)
-{
- if (!uc->tchan)
- return;
- udma_update_bits(uc->tchan->reg_rt, reg, mask, val);
-}
-
-/* RCHANRT */
-static inline u32 udma_rchanrt_read(struct udma_chan *uc, int reg)
-{
- if (!uc->rchan)
- return 0;
- return udma_read(uc->rchan->reg_rt, reg);
-}
-
-static inline void udma_rchanrt_write(struct udma_chan *uc, int reg, u32 val)
-{
- if (!uc->rchan)
- return;
- udma_write(uc->rchan->reg_rt, reg, val);
-}
-
-static inline void udma_rchanrt_update_bits(struct udma_chan *uc, int reg,
- u32 mask, u32 val)
-{
- if (!uc->rchan)
- return;
- udma_update_bits(uc->rchan->reg_rt, reg, mask, val);
-}
-
static int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
{
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
@@ -216,17 +131,6 @@ static void udma_dump_chan_stdata(struct udma_chan *uc)
}
}
-static inline dma_addr_t udma_curr_cppi5_desc_paddr(struct udma_desc *d,
- int idx)
-{
- return d->hwdesc[idx].cppi5_desc_paddr;
-}
-
-static inline void *udma_curr_cppi5_desc_vaddr(struct udma_desc *d, int idx)
-{
- return d->hwdesc[idx].cppi5_desc_vaddr;
-}
-
static struct udma_desc *udma_udma_desc_from_paddr(struct udma_chan *uc,
dma_addr_t paddr)
{
@@ -369,11 +273,6 @@ static bool udma_is_chan_paused(struct udma_chan *uc)
return false;
}
-static inline dma_addr_t udma_get_rx_flush_hwdesc_paddr(struct udma_chan *uc)
-{
- return uc->ud->rx_flush.hwdescs[uc->config.pkt_mode].cppi5_desc_paddr;
-}
-
static int udma_push_to_ring(struct udma_chan *uc, int idx)
{
struct udma_desc *d = uc->desc;
@@ -775,13 +674,6 @@ static void udma_cyclic_packet_elapsed(struct udma_chan *uc)
d->desc_idx = (d->desc_idx + 1) % d->sglen;
}
-static inline void udma_fetch_epib(struct udma_chan *uc, struct udma_desc *d)
-{
- struct cppi5_host_desc_t *h_desc = d->hwdesc[0].cppi5_desc_vaddr;
-
- memcpy(d->metadata, h_desc->epib, d->metadata_size);
-}
-
static bool udma_is_desc_really_done(struct udma_chan *uc, struct udma_desc *d)
{
u32 peer_bcnt, bcnt;
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 37aa9ba5b4d18..3a786b3eddc67 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -447,6 +447,115 @@ struct udma_chan {
u32 id;
};
+/* K3 UDMA helper functions */
+static inline struct udma_dev *to_udma_dev(struct dma_device *d)
+{
+ return container_of(d, struct udma_dev, ddev);
+}
+
+static inline struct udma_chan *to_udma_chan(struct dma_chan *c)
+{
+ return container_of(c, struct udma_chan, vc.chan);
+}
+
+static inline struct udma_desc *to_udma_desc(struct dma_async_tx_descriptor *t)
+{
+ return container_of(t, struct udma_desc, vd.tx);
+}
+
+/* Generic register access functions */
+static inline u32 udma_read(void __iomem *base, int reg)
+{
+ return readl(base + reg);
+}
+
+static inline void udma_write(void __iomem *base, int reg, u32 val)
+{
+ writel(val, base + reg);
+}
+
+static inline void udma_update_bits(void __iomem *base, int reg,
+ u32 mask, u32 val)
+{
+ u32 tmp, orig;
+
+ orig = readl(base + reg);
+ tmp = orig & ~mask;
+ tmp |= (val & mask);
+
+ if (tmp != orig)
+ writel(tmp, base + reg);
+}
+
+/* TCHANRT */
+static inline u32 udma_tchanrt_read(struct udma_chan *uc, int reg)
+{
+ if (!uc->tchan)
+ return 0;
+ return udma_read(uc->tchan->reg_rt, reg);
+}
+
+static inline void udma_tchanrt_write(struct udma_chan *uc, int reg, u32 val)
+{
+ if (!uc->tchan)
+ return;
+ udma_write(uc->tchan->reg_rt, reg, val);
+}
+
+static inline void udma_tchanrt_update_bits(struct udma_chan *uc, int reg,
+ u32 mask, u32 val)
+{
+ if (!uc->tchan)
+ return;
+ udma_update_bits(uc->tchan->reg_rt, reg, mask, val);
+}
+
+/* RCHANRT */
+static inline u32 udma_rchanrt_read(struct udma_chan *uc, int reg)
+{
+ if (!uc->rchan)
+ return 0;
+ return udma_read(uc->rchan->reg_rt, reg);
+}
+
+static inline void udma_rchanrt_write(struct udma_chan *uc, int reg, u32 val)
+{
+ if (!uc->rchan)
+ return;
+ udma_write(uc->rchan->reg_rt, reg, val);
+}
+
+static inline void udma_rchanrt_update_bits(struct udma_chan *uc, int reg,
+ u32 mask, u32 val)
+{
+ if (!uc->rchan)
+ return;
+ udma_update_bits(uc->rchan->reg_rt, reg, mask, val);
+}
+
+static inline dma_addr_t udma_curr_cppi5_desc_paddr(struct udma_desc *d,
+ int idx)
+{
+ return d->hwdesc[idx].cppi5_desc_paddr;
+}
+
+static inline void *udma_curr_cppi5_desc_vaddr(struct udma_desc *d, int idx)
+{
+ return d->hwdesc[idx].cppi5_desc_vaddr;
+}
+
+static inline dma_addr_t udma_get_rx_flush_hwdesc_paddr(struct udma_chan *uc)
+{
+ return uc->ud->rx_flush.hwdescs[uc->config.pkt_mode].cppi5_desc_paddr;
+}
+
+static inline void udma_fetch_epib(struct udma_chan *uc, struct udma_desc *d)
+{
+ struct cppi5_host_desc_t *h_desc = d->hwdesc[0].cppi5_desc_vaddr;
+
+ memcpy(d->metadata, h_desc->epib, d->metadata_size);
+}
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 11/19] dmaengine: ti: k3-udma: move inclusion of k3-udma-private.c to k3-udma-common.c
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Relocate the #include directive for k3-udma-private.c to
k3-udma-common.c so that the code can be shared between other UDMA
variants (like k3-udma-v2). This change improves modularity and prepares
for variant-specific implementations.
No functional changes intended.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma-common.c | 3 +++
drivers/dma/ti/k3-udma.c | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-common.c b/drivers/dma/ti/k3-udma-common.c
index b419b23c401a1..0ffc6becc402e 100644
--- a/drivers/dma/ti/k3-udma-common.c
+++ b/drivers/dma/ti/k3-udma-common.c
@@ -2539,3 +2539,6 @@ EXPORT_SYMBOL_GPL(setup_resources);
MODULE_DESCRIPTION("Texas Instruments K3 UDMA Common Library");
MODULE_LICENSE("GPL v2");
+
+/* Private interfaces to UDMA */
+#include "k3-udma-private.c"
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index d9d6cbda46b2c..58cbb399bc3b2 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -2857,5 +2857,3 @@ module_platform_driver(udma_driver);
MODULE_DESCRIPTION("Texas Instruments UDMA support");
MODULE_LICENSE("GPL v2");
-/* Private interfaces to UDMA */
-#include "k3-udma-private.c"
--
2.53.0
^ permalink raw reply related
* [PATCH v6 06/19] dmaengine: ti: k3-udma: move ring management functions to k3-udma-common.c
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Relocate the ring management functions such as push, pop, and reset
from k3-udma.c to k3-udma-common.c file. These operations are
common across multiple K3 UDMA variants and will be reused by
future implementations like K3 UDMA v2.
No functional changes intended.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma-common.c | 103 ++++++++++++++++++++++++++++++++
drivers/dma/ti/k3-udma.c | 100 -------------------------------
drivers/dma/ti/k3-udma.h | 4 ++
3 files changed, 107 insertions(+), 100 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-common.c b/drivers/dma/ti/k3-udma-common.c
index 9cb35759c70bb..4dcf986f84d87 100644
--- a/drivers/dma/ti/k3-udma-common.c
+++ b/drivers/dma/ti/k3-udma-common.c
@@ -1239,5 +1239,108 @@ void udma_desc_pre_callback(struct virt_dma_chan *vc,
}
EXPORT_SYMBOL_GPL(udma_desc_pre_callback);
+int udma_push_to_ring(struct udma_chan *uc, int idx)
+{
+ struct udma_desc *d = uc->desc;
+ struct k3_ring *ring = NULL;
+ dma_addr_t paddr;
+
+ switch (uc->config.dir) {
+ case DMA_DEV_TO_MEM:
+ ring = uc->rflow->fd_ring;
+ break;
+ case DMA_MEM_TO_DEV:
+ case DMA_MEM_TO_MEM:
+ ring = uc->tchan->t_ring;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* RX flush packet: idx == -1 is only passed in case of DEV_TO_MEM */
+ if (idx == -1) {
+ paddr = udma_get_rx_flush_hwdesc_paddr(uc);
+ } else {
+ paddr = udma_curr_cppi5_desc_paddr(d, idx);
+
+ wmb(); /* Ensure that writes are not moved over this point */
+ }
+
+ return k3_ringacc_ring_push(ring, &paddr);
+}
+EXPORT_SYMBOL_GPL(udma_push_to_ring);
+
+int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
+{
+ struct k3_ring *ring = NULL;
+ int ret;
+
+ switch (uc->config.dir) {
+ case DMA_DEV_TO_MEM:
+ ring = uc->rflow->r_ring;
+ break;
+ case DMA_MEM_TO_DEV:
+ case DMA_MEM_TO_MEM:
+ ring = uc->tchan->tc_ring;
+ break;
+ default:
+ return -ENOENT;
+ }
+
+ ret = k3_ringacc_ring_pop(ring, addr);
+ if (ret)
+ return ret;
+
+ rmb(); /* Ensure that reads are not moved before this point */
+
+ /* Teardown completion */
+ if (cppi5_desc_is_tdcm(*addr))
+ return 0;
+
+ /* Check for flush descriptor */
+ if (udma_desc_is_rx_flush(uc, *addr))
+ return -ENOENT;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(udma_pop_from_ring);
+
+void udma_reset_rings(struct udma_chan *uc)
+{
+ struct k3_ring *ring1 = NULL;
+ struct k3_ring *ring2 = NULL;
+
+ switch (uc->config.dir) {
+ case DMA_DEV_TO_MEM:
+ if (uc->rchan) {
+ ring1 = uc->rflow->fd_ring;
+ ring2 = uc->rflow->r_ring;
+ }
+ break;
+ case DMA_MEM_TO_DEV:
+ case DMA_MEM_TO_MEM:
+ if (uc->tchan) {
+ ring1 = uc->tchan->t_ring;
+ ring2 = uc->tchan->tc_ring;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (ring1)
+ k3_ringacc_ring_reset_dma(ring1,
+ k3_ringacc_ring_get_occ(ring1));
+ if (ring2)
+ k3_ringacc_ring_reset(ring2);
+
+ /* make sure we are not leaking memory by stalled descriptor */
+ if (uc->terminated_desc) {
+ udma_desc_free(&uc->terminated_desc->vd);
+ uc->terminated_desc = NULL;
+ }
+}
+EXPORT_SYMBOL_GPL(udma_reset_rings);
+
MODULE_DESCRIPTION("Texas Instruments K3 UDMA Common Library");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 96df0893fa095..5c84741881cae 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -174,106 +174,6 @@ static bool udma_is_chan_paused(struct udma_chan *uc)
return false;
}
-static int udma_push_to_ring(struct udma_chan *uc, int idx)
-{
- struct udma_desc *d = uc->desc;
- struct k3_ring *ring = NULL;
- dma_addr_t paddr;
-
- switch (uc->config.dir) {
- case DMA_DEV_TO_MEM:
- ring = uc->rflow->fd_ring;
- break;
- case DMA_MEM_TO_DEV:
- case DMA_MEM_TO_MEM:
- ring = uc->tchan->t_ring;
- break;
- default:
- return -EINVAL;
- }
-
- /* RX flush packet: idx == -1 is only passed in case of DEV_TO_MEM */
- if (idx == -1) {
- paddr = udma_get_rx_flush_hwdesc_paddr(uc);
- } else {
- paddr = udma_curr_cppi5_desc_paddr(d, idx);
-
- wmb(); /* Ensure that writes are not moved over this point */
- }
-
- return k3_ringacc_ring_push(ring, &paddr);
-}
-
-static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
-{
- struct k3_ring *ring = NULL;
- int ret;
-
- switch (uc->config.dir) {
- case DMA_DEV_TO_MEM:
- ring = uc->rflow->r_ring;
- break;
- case DMA_MEM_TO_DEV:
- case DMA_MEM_TO_MEM:
- ring = uc->tchan->tc_ring;
- break;
- default:
- return -ENOENT;
- }
-
- ret = k3_ringacc_ring_pop(ring, addr);
- if (ret)
- return ret;
-
- rmb(); /* Ensure that reads are not moved before this point */
-
- /* Teardown completion */
- if (cppi5_desc_is_tdcm(*addr))
- return 0;
-
- /* Check for flush descriptor */
- if (udma_desc_is_rx_flush(uc, *addr))
- return -ENOENT;
-
- return 0;
-}
-
-static void udma_reset_rings(struct udma_chan *uc)
-{
- struct k3_ring *ring1 = NULL;
- struct k3_ring *ring2 = NULL;
-
- switch (uc->config.dir) {
- case DMA_DEV_TO_MEM:
- if (uc->rchan) {
- ring1 = uc->rflow->fd_ring;
- ring2 = uc->rflow->r_ring;
- }
- break;
- case DMA_MEM_TO_DEV:
- case DMA_MEM_TO_MEM:
- if (uc->tchan) {
- ring1 = uc->tchan->t_ring;
- ring2 = uc->tchan->tc_ring;
- }
- break;
- default:
- break;
- }
-
- if (ring1)
- k3_ringacc_ring_reset_dma(ring1,
- k3_ringacc_ring_get_occ(ring1));
- if (ring2)
- k3_ringacc_ring_reset(ring2);
-
- /* make sure we are not leaking memory by stalled descriptor */
- if (uc->terminated_desc) {
- udma_desc_free(&uc->terminated_desc->vd);
- uc->terminated_desc = NULL;
- }
-}
-
static void udma_decrement_byte_counters(struct udma_chan *uc, u32 val)
{
if (uc->desc->dir == DMA_DEV_TO_MEM) {
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 7c807bd9e178b..4c6e5b946d5cf 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -610,6 +610,10 @@ void udma_desc_pre_callback(struct virt_dma_chan *vc,
struct virt_dma_desc *vd,
struct dmaengine_result *result);
+int udma_push_to_ring(struct udma_chan *uc, int idx);
+int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr);
+void udma_reset_rings(struct udma_chan *uc);
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 13/19] dt-bindings: dma: ti: Add K3 BCDMA V2
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
New binding document for
Texas Instruments K3 Block Copy DMA (BCDMA) V2.
BCDMA V2 is introduced as part of AM62L.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
.../bindings/dma/ti/ti,am62l-dmss-bcdma.yaml | 121 ++++++++++++++++++
1 file changed, 121 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml
diff --git a/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml
new file mode 100644
index 0000000000000..28dcfce5633ce
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/ti/ti,am62l-dmss-bcdma.yaml
@@ -0,0 +1,121 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2024-25 Texas Instruments Incorporated
+# Author: Sai Sree Kartheek Adivi <s-adivi@ti.com>
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/ti/ti,am62l-dmss-bcdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 DMSS BCDMA V2
+
+maintainers:
+ - Sai Sree Kartheek Adivi <s-adivi@ti.com>
+
+description:
+ The BCDMA V2 is intended to perform similar functions as the TR
+ mode channels of K3 UDMA-P.
+ BCDMA V2 includes block copy channels and Split channels.
+
+ Block copy channels mainly used for memory to memory transfers, but with
+ optional triggers a block copy channel can service peripherals by accessing
+ directly to memory mapped registers or area.
+
+ Split channels can be used to service PSI-L based peripherals.
+ The peripherals can be PSI-L native or legacy, non PSI-L native peripherals
+ with PDMAs. PDMA is tasked to act as a bridge between the PSI-L fabric and the
+ legacy peripheral.
+
+allOf:
+ - $ref: /schemas/dma/dma-controller.yaml#
+
+properties:
+ compatible:
+ const: ti,am62l-dmss-bcdma
+
+ reg:
+ items:
+ - description: BCDMA Control & Status Registers region
+ - description: Block Copy Channel Realtime Registers region
+ - description: Channel Realtime Registers region
+ - description: Ring Realtime Registers region
+
+ reg-names:
+ items:
+ - const: gcfg
+ - const: bchanrt
+ - const: chanrt
+ - const: ringrt
+
+ "#address-cells":
+ const: 0
+
+ "#dma-cells":
+ const: 4
+ description: |
+ cell 1: Trigger type for the channel
+ 0 - disable / no trigger
+ 1 - internal channel event
+ 2 - external signal
+ 3 - timer manager event
+
+ cell 2: parameter for the trigger:
+ if cell 1 is 0 (disable / no trigger):
+ Unused, ignored
+ if cell 1 is 1 (internal channel event):
+ channel number whose TR event should trigger the current channel.
+ if cell 1 is 2 or 3 (external signal or timer manager event):
+ index of global interfaces that come into the DMA.
+
+ Please refer to the device documentation for global interface indexes.
+
+ cell 3: Channel number for the peripheral
+
+ Please refer to the device documentation for the channel map.
+
+ cell 4: ASEL value for the channel
+
+ interrupts:
+ minItems: 1
+ maxItems: 144
+ description:
+ Interrupts for DMA channels.
+
+ interrupt-names:
+ minItems: 1
+ maxItems: 144
+ items:
+ pattern: "^chan[0-9]+$"
+ description:
+ The name of the interrupt corresponding to the DMA channel.
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - "#address-cells"
+ - "#dma-cells"
+ - interrupts
+ - interrupt-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ dma-controller@485c4000 {
+ compatible = "ti,am62l-dmss-bcdma";
+ reg = <0x485c4000 0x4000>,
+ <0x48880000 0x10000>,
+ <0x48800000 0x80000>,
+ <0x47000000 0x200000>;
+ reg-names = "gcfg", "bchanrt", "chanrt", "ringrt";
+
+ #address-cells = <0>;
+ #dma-cells = <4>;
+
+ interrupts = <GIC_SPI 385 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 386 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "chan49", "chan50";
+ };
--
2.53.0
^ permalink raw reply related
* [PATCH v6 12/19] drivers: soc: ti: k3-ringacc: handle absence of tisci
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Handle absence of tisci with direct register writes. This will support
platforms that do not have tisci firmware like AM62L.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/soc/ti/k3-ringacc.c | 188 ++++++++++++++++++++++++++----
include/linux/soc/ti/k3-ringacc.h | 17 +++
2 files changed, 181 insertions(+), 24 deletions(-)
diff --git a/drivers/soc/ti/k3-ringacc.c b/drivers/soc/ti/k3-ringacc.c
index 7602b8a909b05..fd7c960a3fa2a 100644
--- a/drivers/soc/ti/k3-ringacc.c
+++ b/drivers/soc/ti/k3-ringacc.c
@@ -45,6 +45,53 @@ struct k3_ring_rt_regs {
u32 hwindx;
};
+#define K3_RINGACC_RT_CFG_REGS_OFS 0x40
+#define K3_DMARING_CFG_ADDR_HI_MASK GENMASK(3, 0)
+#define K3_DMARING_CFG_ASEL_SHIFT 16
+#define K3_DMARING_CFG_SIZE_MASK GENMASK(15, 0)
+
+/**
+ * struct k3_ring_cfg_regs - The RA Configuration Registers region
+ *
+ * @ba_lo: Ring Base Address Low Register
+ * @ba_hi: Ring Base Address High Register
+ * @size: Ring Size Register
+ */
+struct k3_ring_cfg_regs {
+ u32 ba_lo;
+ u32 ba_hi;
+ u32 size;
+};
+
+#define K3_RINGACC_RT_INT_REGS_OFS 0x140
+#define K3_RINGACC_RT_INT_ENABLE_SET_COMPLETE BIT(0)
+#define K3_RINGACC_RT_INT_ENABLE_SET_TR BIT(2)
+
+/**
+ * struct k3_ring_intr_regs {
+ *
+ * @enable_set: Ring Interrupt Enable Register
+ * @resv_1: Reserved
+ * @clr: Ring Interrupt Clear Register
+ * @resv_2: Reserved
+ * @status_set: Ring Interrupt Status Set Register
+ * @resv_3: Reserved
+ * @status: Ring Interrupt Status Register
+ * @resv_4: Reserved
+ * @status_masked: Ring Interrupt Status Masked Register
+ */
+struct k3_ring_intr_regs {
+ u32 enable_set;
+ u32 resv_1;
+ u32 clr;
+ u32 resv_2;
+ u32 status_set;
+ u32 resv_3;
+ u32 status;
+ u32 resv_4;
+ u32 status_masked;
+};
+
#define K3_RINGACC_RT_REGS_STEP 0x1000
#define K3_DMARING_RT_REGS_STEP 0x2000
#define K3_DMARING_RT_REGS_REVERSE_OFS 0x1000
@@ -138,6 +185,8 @@ struct k3_ring_state {
* struct k3_ring - RA Ring descriptor
*
* @rt: Ring control/status registers
+ * @cfg: Ring config registers
+ * @intr: Ring interrupt registers
* @fifos: Ring queues registers
* @proxy: Ring Proxy Datapath registers
* @ring_mem_dma: Ring buffer dma address
@@ -157,6 +206,8 @@ struct k3_ring_state {
*/
struct k3_ring {
struct k3_ring_rt_regs __iomem *rt;
+ struct k3_ring_cfg_regs __iomem *cfg;
+ struct k3_ring_intr_regs __iomem *intr;
struct k3_ring_fifo_regs __iomem *fifos;
struct k3_ringacc_proxy_target_regs __iomem *proxy;
dma_addr_t ring_mem_dma;
@@ -466,15 +517,31 @@ static void k3_ringacc_ring_reset_sci(struct k3_ring *ring)
struct k3_ringacc *ringacc = ring->parent;
int ret;
- ring_cfg.nav_id = ringacc->tisci_dev_id;
- ring_cfg.index = ring->ring_id;
- ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_COUNT_VALID;
- ring_cfg.count = ring->size;
+ if (!ringacc->tisci) {
+ u32 reg;
- ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
- if (ret)
- dev_err(ringacc->dev, "TISCI reset ring fail (%d) ring_idx %d\n",
- ret, ring->ring_id);
+ if (!ring->cfg)
+ return;
+
+ reg = readl(&ring->cfg->size);
+ reg &= ~K3_DMARING_CFG_SIZE_MASK;
+ writel(reg, &ring->cfg->size);
+
+ /* Ensure the register clear operation completes before writing new value */
+ wmb();
+ reg |= ring->size;
+ writel(reg, &ring->cfg->size);
+ } else {
+ ring_cfg.nav_id = ringacc->tisci_dev_id;
+ ring_cfg.index = ring->ring_id;
+ ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_COUNT_VALID;
+ ring_cfg.count = ring->size;
+
+ ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
+ if (ret)
+ dev_err(ringacc->dev, "TISCI reset ring fail (%d) ring_idx %d\n",
+ ret, ring->ring_id);
+ }
}
void k3_ringacc_ring_reset(struct k3_ring *ring)
@@ -500,10 +567,25 @@ static void k3_ringacc_ring_reconfig_qmode_sci(struct k3_ring *ring,
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_RING_MODE_VALID;
ring_cfg.mode = mode;
- ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
- if (ret)
- dev_err(ringacc->dev, "TISCI reconf qmode fail (%d) ring_idx %d\n",
- ret, ring->ring_id);
+ if (!ringacc->tisci) {
+ u32 reg;
+
+ writel(ring_cfg.addr_lo, &ring->cfg->ba_lo);
+ writel((ring_cfg.addr_hi & K3_DMARING_CFG_ADDR_HI_MASK) +
+ (ring_cfg.asel << K3_DMARING_CFG_ASEL_SHIFT),
+ &ring->cfg->ba_hi);
+
+ reg = readl(&ring->cfg->size);
+ reg &= ~K3_DMARING_CFG_SIZE_MASK;
+ reg |= ring_cfg.count & K3_DMARING_CFG_SIZE_MASK;
+
+ writel(reg, &ring->cfg->size);
+ } else {
+ ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
+ if (ret)
+ dev_err(ringacc->dev, "TISCI reconf qmode fail (%d) ring_idx %d\n",
+ ret, ring->ring_id);
+ }
}
void k3_ringacc_ring_reset_dma(struct k3_ring *ring, u32 occ)
@@ -575,10 +657,25 @@ static void k3_ringacc_ring_free_sci(struct k3_ring *ring)
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
- ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
- if (ret)
- dev_err(ringacc->dev, "TISCI ring free fail (%d) ring_idx %d\n",
- ret, ring->ring_id);
+ if (!ringacc->tisci) {
+ u32 reg;
+
+ writel(ring_cfg.addr_lo, &ring->cfg->ba_lo);
+ writel((ring_cfg.addr_hi & K3_DMARING_CFG_ADDR_HI_MASK) +
+ (ring_cfg.asel << K3_DMARING_CFG_ASEL_SHIFT),
+ &ring->cfg->ba_hi);
+
+ reg = readl(&ring->cfg->size);
+ reg &= ~K3_DMARING_CFG_SIZE_MASK;
+ reg |= ring_cfg.count & K3_DMARING_CFG_SIZE_MASK;
+
+ writel(reg, &ring->cfg->size);
+ } else {
+ ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
+ if (ret)
+ dev_err(ringacc->dev, "TISCI ring free fail (%d) ring_idx %d\n",
+ ret, ring->ring_id);
+ }
}
int k3_ringacc_ring_free(struct k3_ring *ring)
@@ -669,15 +766,30 @@ int k3_ringacc_get_ring_irq_num(struct k3_ring *ring)
}
EXPORT_SYMBOL_GPL(k3_ringacc_get_ring_irq_num);
+u32 k3_ringacc_ring_get_irq_status(struct k3_ring *ring)
+{
+ struct k3_ringacc *ringacc = ring->parent;
+ struct k3_ring *ring2 = &ringacc->rings[ring->ring_id];
+
+ return readl(&ring2->intr->status);
+}
+EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_irq_status);
+
+void k3_ringacc_ring_clear_irq(struct k3_ring *ring)
+{
+ struct k3_ringacc *ringacc = ring->parent;
+ struct k3_ring *ring2 = &ringacc->rings[ring->ring_id];
+
+ writel(0xFF, &ring2->intr->status);
+}
+EXPORT_SYMBOL_GPL(k3_ringacc_ring_clear_irq);
+
static int k3_ringacc_ring_cfg_sci(struct k3_ring *ring)
{
struct ti_sci_msg_rm_ring_cfg ring_cfg = { 0 };
struct k3_ringacc *ringacc = ring->parent;
int ret;
- if (!ringacc->tisci)
- return -EINVAL;
-
ring_cfg.nav_id = ringacc->tisci_dev_id;
ring_cfg.index = ring->ring_id;
ring_cfg.valid_params = TI_SCI_MSG_VALUE_RM_ALL_NO_ORDER;
@@ -688,6 +800,24 @@ static int k3_ringacc_ring_cfg_sci(struct k3_ring *ring)
ring_cfg.size = ring->elm_size;
ring_cfg.asel = ring->asel;
+ if (!ringacc->tisci) {
+ u32 reg;
+
+ writel(ring_cfg.addr_lo, &ring->cfg->ba_lo);
+ writel((ring_cfg.addr_hi & K3_DMARING_CFG_ADDR_HI_MASK) +
+ (ring_cfg.asel << K3_DMARING_CFG_ASEL_SHIFT),
+ &ring->cfg->ba_hi);
+
+ reg = readl(&ring->cfg->size);
+ reg &= ~K3_DMARING_CFG_SIZE_MASK;
+ reg |= ring_cfg.count & K3_DMARING_CFG_SIZE_MASK;
+
+ writel(reg, &ring->cfg->size);
+ writel(K3_RINGACC_RT_INT_ENABLE_SET_COMPLETE | K3_RINGACC_RT_INT_ENABLE_SET_TR,
+ &ring->intr->enable_set);
+ return 0;
+ }
+
ret = ringacc->tisci_ring_ops->set_cfg(ringacc->tisci, &ring_cfg);
if (ret)
dev_err(ringacc->dev, "TISCI config ring fail (%d) ring_idx %d\n",
@@ -1346,8 +1476,11 @@ static int k3_ringacc_probe_dt(struct k3_ringacc *ringacc)
return PTR_ERR(ringacc->rm_gp_range);
}
- return ti_sci_inta_msi_domain_alloc_irqs(ringacc->dev,
- ringacc->rm_gp_range);
+ if (IS_ENABLED(CONFIG_TI_K3_UDMA))
+ return ti_sci_inta_msi_domain_alloc_irqs(ringacc->dev,
+ ringacc->rm_gp_range);
+ else
+ return 0;
}
static const struct k3_ringacc_soc_data k3_ringacc_soc_data_sr1 = {
@@ -1480,9 +1613,12 @@ struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
mutex_init(&ringacc->req_lock);
- base_rt = devm_platform_ioremap_resource_byname(pdev, "ringrt");
- if (IS_ERR(base_rt))
- return ERR_CAST(base_rt);
+ base_rt = data->base_rt;
+ if (!base_rt) {
+ base_rt = devm_platform_ioremap_resource_byname(pdev, "ringrt");
+ if (IS_ERR(base_rt))
+ return ERR_CAST(base_rt);
+ }
ringacc->rings = devm_kzalloc(dev,
sizeof(*ringacc->rings) *
@@ -1498,6 +1634,10 @@ struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
struct k3_ring *ring = &ringacc->rings[i];
ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i;
+ ring->cfg = base_rt + K3_RINGACC_RT_CFG_REGS_OFS +
+ K3_DMARING_RT_REGS_STEP * i;
+ ring->intr = base_rt + K3_RINGACC_RT_INT_REGS_OFS +
+ K3_DMARING_RT_REGS_STEP * i;
ring->parent = ringacc;
ring->ring_id = i;
ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
diff --git a/include/linux/soc/ti/k3-ringacc.h b/include/linux/soc/ti/k3-ringacc.h
index 39b022b925986..9f2d141c988bd 100644
--- a/include/linux/soc/ti/k3-ringacc.h
+++ b/include/linux/soc/ti/k3-ringacc.h
@@ -158,6 +158,22 @@ u32 k3_ringacc_get_ring_id(struct k3_ring *ring);
*/
int k3_ringacc_get_ring_irq_num(struct k3_ring *ring);
+/**
+ * k3_ringacc_ring_get_irq_status - Get the irq status for the ring
+ * @ring: pointer on ring
+ *
+ * Returns the interrupt status
+ */
+u32 k3_ringacc_ring_get_irq_status(struct k3_ring *ring);
+
+/**
+ * k3_ringacc_ring_clear_irq - Clear all interrupts
+ * @ring: pointer on ring
+ *
+ * Clears all the interrupts on the ring
+ */
+void k3_ringacc_ring_clear_irq(struct k3_ring *ring);
+
/**
* k3_ringacc_ring_cfg - ring configure
* @ring: pointer on ring
@@ -262,6 +278,7 @@ struct k3_ringacc_init_data {
const struct ti_sci_handle *tisci;
u32 tisci_dev_id;
u32 num_rings;
+ void __iomem *base_rt;
};
struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 07/19] dmaengine: ti: k3-udma: Add variant-specific function pointers to udma_dev
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
Introduce function pointers in the udma_dev structure to allow
variant-specific implementations for certain operations.
This prepares the driver for supporting multiple K3 UDMA variants,
such as UDMA v2, with minimal code duplication.
No functional changes intended in this commit.
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma-private.c | 10 +++++--
drivers/dma/ti/k3-udma.c | 46 +++++++++++++++++++-------------
drivers/dma/ti/k3-udma.h | 12 +++++++++
3 files changed, 47 insertions(+), 21 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-private.c b/drivers/dma/ti/k3-udma-private.c
index 624360423ef17..44c097fff5ee6 100644
--- a/drivers/dma/ti/k3-udma-private.c
+++ b/drivers/dma/ti/k3-udma-private.c
@@ -8,13 +8,19 @@
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
{
- return navss_psil_pair(ud, src_thread, dst_thread);
+ if (ud->psil_pair)
+ return ud->psil_pair(ud, src_thread, dst_thread);
+
+ return 0;
}
EXPORT_SYMBOL(xudma_navss_psil_pair);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
{
- return navss_psil_unpair(ud, src_thread, dst_thread);
+ if (ud->psil_unpair)
+ return ud->psil_unpair(ud, src_thread, dst_thread);
+
+ return 0;
}
EXPORT_SYMBOL(xudma_navss_psil_unpair);
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 5c84741881cae..21b1e3908399d 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -40,7 +40,7 @@ static const char * const mmr_names[] = {
[MMR_TCHANRT] = "tchanrt",
};
-static int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
+int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
{
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
@@ -50,8 +50,8 @@ static int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread)
src_thread, dst_thread);
}
-static int navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
- u32 dst_thread)
+int navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
+ u32 dst_thread)
{
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
@@ -329,7 +329,7 @@ static int udma_start(struct udma_chan *uc)
}
/* Make sure that we clear the teardown bit, if it is set */
- udma_reset_chan(uc, false);
+ uc->ud->reset_chan(uc, false);
/* Push descriptors before we start the channel */
udma_start_desc(uc);
@@ -521,8 +521,8 @@ static void udma_check_tx_completion(struct work_struct *work)
if (uc->desc) {
struct udma_desc *d = uc->desc;
- udma_decrement_byte_counters(uc, d->residue);
- udma_start(uc);
+ uc->ud->decrement_byte_counters(uc, d->residue);
+ uc->ud->start(uc);
vchan_cookie_complete(&d->vd);
break;
}
@@ -554,7 +554,7 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data)
}
if (!uc->desc)
- udma_start(uc);
+ uc->ud->start(uc);
goto out;
}
@@ -576,8 +576,8 @@ static irqreturn_t udma_ring_irq_handler(int irq, void *data)
vchan_cyclic_callback(&d->vd);
} else {
if (udma_is_desc_really_done(uc, d)) {
- udma_decrement_byte_counters(uc, d->residue);
- udma_start(uc);
+ uc->ud->decrement_byte_counters(uc, d->residue);
+ uc->ud->start(uc);
vchan_cookie_complete(&d->vd);
} else {
schedule_delayed_work(&uc->tx_drain.work,
@@ -612,8 +612,8 @@ static irqreturn_t udma_udma_irq_handler(int irq, void *data)
vchan_cyclic_callback(&d->vd);
} else {
/* TODO: figure out the real amount of data */
- udma_decrement_byte_counters(uc, d->residue);
- udma_start(uc);
+ uc->ud->decrement_byte_counters(uc, d->residue);
+ uc->ud->start(uc);
vchan_cookie_complete(&d->vd);
}
}
@@ -1654,7 +1654,7 @@ static int udma_alloc_chan_resources(struct dma_chan *chan)
if (udma_is_chan_running(uc)) {
dev_warn(ud->dev, "chan%d: is running!\n", uc->id);
- udma_reset_chan(uc, false);
+ ud->reset_chan(uc, false);
if (udma_is_chan_running(uc)) {
dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
ret = -EBUSY;
@@ -1821,7 +1821,7 @@ static int bcdma_alloc_chan_resources(struct dma_chan *chan)
if (udma_is_chan_running(uc)) {
dev_warn(ud->dev, "chan%d: is running!\n", uc->id);
- udma_reset_chan(uc, false);
+ ud->reset_chan(uc, false);
if (udma_is_chan_running(uc)) {
dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
ret = -EBUSY;
@@ -2014,7 +2014,7 @@ static int pktdma_alloc_chan_resources(struct dma_chan *chan)
if (udma_is_chan_running(uc)) {
dev_warn(ud->dev, "chan%d: is running!\n", uc->id);
- udma_reset_chan(uc, false);
+ ud->reset_chan(uc, false);
if (udma_is_chan_running(uc)) {
dev_err(ud->dev, "chan%d: won't stop!\n", uc->id);
ret = -EBUSY;
@@ -2123,7 +2123,7 @@ static void udma_issue_pending(struct dma_chan *chan)
*/
if (!(uc->state == UDMA_CHAN_IS_TERMINATING &&
udma_is_chan_running(uc)))
- udma_start(uc);
+ uc->ud->start(uc);
}
spin_unlock_irqrestore(&uc->vc.lock, flags);
@@ -2265,7 +2265,7 @@ static int udma_terminate_all(struct dma_chan *chan)
spin_lock_irqsave(&uc->vc.lock, flags);
if (udma_is_chan_running(uc))
- udma_stop(uc);
+ uc->ud->stop(uc);
if (uc->desc) {
uc->terminated_desc = uc->desc;
@@ -2297,11 +2297,11 @@ static void udma_synchronize(struct dma_chan *chan)
dev_warn(uc->ud->dev, "chan%d teardown timeout!\n",
uc->id);
udma_dump_chan_stdata(uc);
- udma_reset_chan(uc, true);
+ uc->ud->reset_chan(uc, true);
}
}
- udma_reset_chan(uc, false);
+ uc->ud->reset_chan(uc, false);
if (udma_is_chan_running(uc))
dev_warn(uc->ud->dev, "chan%d refused to stop!\n", uc->id);
@@ -2355,7 +2355,7 @@ static void udma_free_chan_resources(struct dma_chan *chan)
udma_terminate_all(chan);
if (uc->terminated_desc) {
- udma_reset_chan(uc, false);
+ ud->reset_chan(uc, false);
udma_reset_rings(uc);
}
@@ -3694,6 +3694,14 @@ static int udma_probe(struct platform_device *pdev)
ud->soc_data = soc->data;
}
+ // Setup function pointers
+ ud->start = udma_start;
+ ud->stop = udma_stop;
+ ud->reset_chan = udma_reset_chan;
+ ud->decrement_byte_counters = udma_decrement_byte_counters;
+ ud->psil_pair = navss_psil_pair;
+ ud->psil_unpair = navss_psil_unpair;
+
ret = udma_get_mmrs(pdev, ud);
if (ret)
return ret;
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index 4c6e5b946d5cf..2f5fbea446fed 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -344,6 +344,15 @@ struct udma_dev {
u32 psil_base;
u32 atype;
u32 asel;
+
+ int (*start)(struct udma_chan *uc);
+ int (*stop)(struct udma_chan *uc);
+ int (*reset_chan)(struct udma_chan *uc, bool hard);
+ void (*decrement_byte_counters)(struct udma_chan *uc, u32 val);
+ int (*psil_pair)(struct udma_dev *ud, u32 src_thread,
+ u32 dst_thread);
+ int (*psil_unpair)(struct udma_dev *ud, u32 src_thread,
+ u32 dst_thread);
};
struct udma_desc {
@@ -614,6 +623,9 @@ int udma_push_to_ring(struct udma_chan *uc, int idx);
int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr);
void udma_reset_rings(struct udma_chan *uc);
+int navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
+int navss_psil_unpair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
^ permalink raw reply related
* [PATCH v6 10/19] dmaengine: ti: k3-udma: refactor resource setup functions
From: Sai Sree Kartheek Adivi @ 2026-04-28 8:51 UTC (permalink / raw)
To: peter.ujfalusi, vkoul, robh, krzk+dt, conor+dt, nm, ssantosh,
dmaengine, devicetree, linux-kernel, linux-arm-kernel, vigneshr,
Frank.li, s-adivi
Cc: r-sharma3, gehariprasath
In-Reply-To: <20260428085202.1724548-1-s-adivi@ti.com>
The implementation of setup_resources, bcdma_setup_resources and
pktdma_setup_resources is largely shared between all K3 UDMA variants
with the only major difference being SCI resources setup. So,
- Move the functions to k3-udma-common.c.
- Split SCI resource setup for bcdma and pktdma into separate functions
in variant specific driver (k3-udma.c).
- Add function pointers for setup_sci_resources in udma_dev and call
them as part of the actual resource setup implementations in
k3-udma-common.c to retain the existing functionality.
- Also since setup_resources call udma_setup_resources which is not
required for all K3 UDMA variants, Add a function pointer in udma_dev
and use that to call udma_setup_resources.
This refactor improves code reuse and maintainability across multiple
variants.
No functional changes intended.
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@ti.com>
---
drivers/dma/ti/k3-udma-common.c | 204 ++++++++++++++++++++++++++++++++
drivers/dma/ti/k3-udma.c | 182 +---------------------------
drivers/dma/ti/k3-udma.h | 8 ++
3 files changed, 218 insertions(+), 176 deletions(-)
diff --git a/drivers/dma/ti/k3-udma-common.c b/drivers/dma/ti/k3-udma-common.c
index 882d27b3c9ee5..b419b23c401a1 100644
--- a/drivers/dma/ti/k3-udma-common.c
+++ b/drivers/dma/ti/k3-udma-common.c
@@ -8,7 +8,9 @@
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/soc/ti/ti_sci_inta_msi.h>
#include <linux/soc/ti/k3-ringacc.h>
#include "k3-udma.h"
@@ -2333,5 +2335,207 @@ void bcdma_free_bchan_resources(struct udma_chan *uc)
}
EXPORT_SYMBOL_GPL(bcdma_free_bchan_resources);
+int bcdma_setup_resources(struct udma_dev *ud)
+{
+ int ret;
+ struct device *dev = ud->dev;
+ u32 cap;
+
+ /* Set up the throughput level start indexes */
+ cap = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
+ if (BCDMA_CAP3_UBCHAN_CNT(cap)) {
+ ud->bchan_tpl.levels = 3;
+ ud->bchan_tpl.start_idx[1] = BCDMA_CAP3_UBCHAN_CNT(cap);
+ ud->bchan_tpl.start_idx[0] = BCDMA_CAP3_HBCHAN_CNT(cap);
+ } else if (BCDMA_CAP3_HBCHAN_CNT(cap)) {
+ ud->bchan_tpl.levels = 2;
+ ud->bchan_tpl.start_idx[0] = BCDMA_CAP3_HBCHAN_CNT(cap);
+ } else {
+ ud->bchan_tpl.levels = 1;
+ }
+
+ cap = udma_read(ud->mmrs[MMR_GCFG], 0x30);
+ if (BCDMA_CAP4_URCHAN_CNT(cap)) {
+ ud->rchan_tpl.levels = 3;
+ ud->rchan_tpl.start_idx[1] = BCDMA_CAP4_URCHAN_CNT(cap);
+ ud->rchan_tpl.start_idx[0] = BCDMA_CAP4_HRCHAN_CNT(cap);
+ } else if (BCDMA_CAP4_HRCHAN_CNT(cap)) {
+ ud->rchan_tpl.levels = 2;
+ ud->rchan_tpl.start_idx[0] = BCDMA_CAP4_HRCHAN_CNT(cap);
+ } else {
+ ud->rchan_tpl.levels = 1;
+ }
+
+ if (BCDMA_CAP4_UTCHAN_CNT(cap)) {
+ ud->tchan_tpl.levels = 3;
+ ud->tchan_tpl.start_idx[1] = BCDMA_CAP4_UTCHAN_CNT(cap);
+ ud->tchan_tpl.start_idx[0] = BCDMA_CAP4_HTCHAN_CNT(cap);
+ } else if (BCDMA_CAP4_HTCHAN_CNT(cap)) {
+ ud->tchan_tpl.levels = 2;
+ ud->tchan_tpl.start_idx[0] = BCDMA_CAP4_HTCHAN_CNT(cap);
+ } else {
+ ud->tchan_tpl.levels = 1;
+ }
+
+ ud->bchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->bchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->bchans = devm_kcalloc(dev, ud->bchan_cnt, sizeof(*ud->bchans),
+ GFP_KERNEL);
+ ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->tchans = devm_kcalloc(dev, ud->tchan_cnt, sizeof(*ud->tchans),
+ GFP_KERNEL);
+ ud->rchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->rchans = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rchans),
+ GFP_KERNEL);
+ /* BCDMA do not really have flows, but the driver expect it */
+ ud->rflow_in_use = devm_kcalloc(dev, BITS_TO_LONGS(ud->rchan_cnt),
+ sizeof(unsigned long),
+ GFP_KERNEL);
+ ud->rflows = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rflows),
+ GFP_KERNEL);
+
+ if (!ud->bchan_map || !ud->tchan_map || !ud->rchan_map ||
+ !ud->rflow_in_use || !ud->bchans || !ud->tchans || !ud->rchans ||
+ !ud->rflows)
+ return -ENOMEM;
+
+ if (ud->bcdma_setup_sci_resources) {
+ ret = ud->bcdma_setup_sci_resources(ud);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int pktdma_setup_resources(struct udma_dev *ud)
+{
+ int ret;
+ struct device *dev = ud->dev;
+ u32 cap3;
+
+ /* Set up the throughput level start indexes */
+ cap3 = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
+ if (UDMA_CAP3_UCHAN_CNT(cap3)) {
+ ud->tchan_tpl.levels = 3;
+ ud->tchan_tpl.start_idx[1] = UDMA_CAP3_UCHAN_CNT(cap3);
+ ud->tchan_tpl.start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);
+ } else if (UDMA_CAP3_HCHAN_CNT(cap3)) {
+ ud->tchan_tpl.levels = 2;
+ ud->tchan_tpl.start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);
+ } else {
+ ud->tchan_tpl.levels = 1;
+ }
+
+ ud->rchan_tpl.levels = ud->tchan_tpl.levels;
+ ud->rchan_tpl.start_idx[0] = ud->tchan_tpl.start_idx[0];
+ ud->rchan_tpl.start_idx[1] = ud->tchan_tpl.start_idx[1];
+
+ ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->tchans = devm_kcalloc(dev, ud->tchan_cnt, sizeof(*ud->tchans),
+ GFP_KERNEL);
+ ud->rchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rchan_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+ ud->rchans = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rchans),
+ GFP_KERNEL);
+ ud->rflow_in_use = devm_kcalloc(dev, BITS_TO_LONGS(ud->rflow_cnt),
+ sizeof(unsigned long),
+ GFP_KERNEL);
+ ud->rflows = devm_kcalloc(dev, ud->rflow_cnt, sizeof(*ud->rflows),
+ GFP_KERNEL);
+ ud->tflow_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tflow_cnt),
+ sizeof(unsigned long), GFP_KERNEL);
+
+ if (!ud->tchan_map || !ud->rchan_map || !ud->tflow_map || !ud->tchans ||
+ !ud->rchans || !ud->rflows || !ud->rflow_in_use)
+ return -ENOMEM;
+
+ if (ud->pktdma_setup_sci_resources) {
+ ret = ud->pktdma_setup_sci_resources(ud);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+int setup_resources(struct udma_dev *ud)
+{
+ struct device *dev = ud->dev;
+ int ch_count, ret;
+
+ switch (ud->match_data->type) {
+ case DMA_TYPE_UDMA:
+ ret = ud->udma_setup_resources(ud);
+ break;
+ case DMA_TYPE_BCDMA:
+ ret = bcdma_setup_resources(ud);
+ break;
+ case DMA_TYPE_PKTDMA:
+ ret = pktdma_setup_resources(ud);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ ch_count = ud->bchan_cnt + ud->tchan_cnt + ud->rchan_cnt;
+ if (ud->bchan_cnt)
+ ch_count -= bitmap_weight(ud->bchan_map, ud->bchan_cnt);
+ ch_count -= bitmap_weight(ud->tchan_map, ud->tchan_cnt);
+ ch_count -= bitmap_weight(ud->rchan_map, ud->rchan_cnt);
+ if (!ch_count)
+ return -ENODEV;
+
+ ud->channels = devm_kcalloc(dev, ch_count, sizeof(*ud->channels),
+ GFP_KERNEL);
+ if (!ud->channels)
+ return -ENOMEM;
+
+ switch (ud->match_data->type) {
+ case DMA_TYPE_UDMA:
+ dev_info(dev,
+ "Channels: %d (tchan: %u, rchan: %u, gp-rflow: %u)\n",
+ ch_count,
+ ud->tchan_cnt - bitmap_weight(ud->tchan_map,
+ ud->tchan_cnt),
+ ud->rchan_cnt - bitmap_weight(ud->rchan_map,
+ ud->rchan_cnt),
+ ud->rflow_cnt - bitmap_weight(ud->rflow_gp_map,
+ ud->rflow_cnt));
+ break;
+ case DMA_TYPE_BCDMA:
+ dev_info(dev,
+ "Channels: %d (bchan: %u, tchan: %u, rchan: %u)\n",
+ ch_count,
+ ud->bchan_cnt - bitmap_weight(ud->bchan_map,
+ ud->bchan_cnt),
+ ud->tchan_cnt - bitmap_weight(ud->tchan_map,
+ ud->tchan_cnt),
+ ud->rchan_cnt - bitmap_weight(ud->rchan_map,
+ ud->rchan_cnt));
+ break;
+ case DMA_TYPE_PKTDMA:
+ dev_info(dev,
+ "Channels: %d (tchan: %u, rchan: %u)\n",
+ ch_count,
+ ud->tchan_cnt - bitmap_weight(ud->tchan_map,
+ ud->tchan_cnt),
+ ud->rchan_cnt - bitmap_weight(ud->rchan_map,
+ ud->rchan_cnt));
+ break;
+ default:
+ break;
+ }
+
+ return ch_count;
+}
+EXPORT_SYMBOL_GPL(setup_resources);
+
MODULE_DESCRIPTION("Texas Instruments K3 UDMA Common Library");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 753acf1e13fa2..d9d6cbda46b2c 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -2083,7 +2083,7 @@ static const char * const range_names[] = {
[RM_RANGE_TFLOW] = "ti,sci-rm-range-tflow",
};
-static int udma_setup_resources(struct udma_dev *ud)
+int udma_setup_resources(struct udma_dev *ud)
{
int ret, i, j;
struct device *dev = ud->dev;
@@ -2245,74 +2245,13 @@ static int udma_setup_resources(struct udma_dev *ud)
return 0;
}
-static int bcdma_setup_resources(struct udma_dev *ud)
+static int bcdma_setup_sci_resources(struct udma_dev *ud)
{
int ret, i, j;
struct device *dev = ud->dev;
struct ti_sci_resource *rm_res, irq_res;
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
const struct udma_oes_offsets *oes = &ud->soc_data->oes;
- u32 cap;
-
- /* Set up the throughput level start indexes */
- cap = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
- if (BCDMA_CAP3_UBCHAN_CNT(cap)) {
- ud->bchan_tpl.levels = 3;
- ud->bchan_tpl.start_idx[1] = BCDMA_CAP3_UBCHAN_CNT(cap);
- ud->bchan_tpl.start_idx[0] = BCDMA_CAP3_HBCHAN_CNT(cap);
- } else if (BCDMA_CAP3_HBCHAN_CNT(cap)) {
- ud->bchan_tpl.levels = 2;
- ud->bchan_tpl.start_idx[0] = BCDMA_CAP3_HBCHAN_CNT(cap);
- } else {
- ud->bchan_tpl.levels = 1;
- }
-
- cap = udma_read(ud->mmrs[MMR_GCFG], 0x30);
- if (BCDMA_CAP4_URCHAN_CNT(cap)) {
- ud->rchan_tpl.levels = 3;
- ud->rchan_tpl.start_idx[1] = BCDMA_CAP4_URCHAN_CNT(cap);
- ud->rchan_tpl.start_idx[0] = BCDMA_CAP4_HRCHAN_CNT(cap);
- } else if (BCDMA_CAP4_HRCHAN_CNT(cap)) {
- ud->rchan_tpl.levels = 2;
- ud->rchan_tpl.start_idx[0] = BCDMA_CAP4_HRCHAN_CNT(cap);
- } else {
- ud->rchan_tpl.levels = 1;
- }
-
- if (BCDMA_CAP4_UTCHAN_CNT(cap)) {
- ud->tchan_tpl.levels = 3;
- ud->tchan_tpl.start_idx[1] = BCDMA_CAP4_UTCHAN_CNT(cap);
- ud->tchan_tpl.start_idx[0] = BCDMA_CAP4_HTCHAN_CNT(cap);
- } else if (BCDMA_CAP4_HTCHAN_CNT(cap)) {
- ud->tchan_tpl.levels = 2;
- ud->tchan_tpl.start_idx[0] = BCDMA_CAP4_HTCHAN_CNT(cap);
- } else {
- ud->tchan_tpl.levels = 1;
- }
-
- ud->bchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->bchan_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->bchans = devm_kcalloc(dev, ud->bchan_cnt, sizeof(*ud->bchans),
- GFP_KERNEL);
- ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->tchans = devm_kcalloc(dev, ud->tchan_cnt, sizeof(*ud->tchans),
- GFP_KERNEL);
- ud->rchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rchan_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->rchans = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rchans),
- GFP_KERNEL);
- /* BCDMA do not really have flows, but the driver expect it */
- ud->rflow_in_use = devm_kcalloc(dev, BITS_TO_LONGS(ud->rchan_cnt),
- sizeof(unsigned long),
- GFP_KERNEL);
- ud->rflows = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rflows),
- GFP_KERNEL);
-
- if (!ud->bchan_map || !ud->tchan_map || !ud->rchan_map ||
- !ud->rflow_in_use || !ud->bchans || !ud->tchans || !ud->rchans ||
- !ud->rflows)
- return -ENOMEM;
/* Get resource ranges from tisci */
for (i = 0; i < RM_RANGE_LAST; i++) {
@@ -2476,51 +2415,13 @@ static int bcdma_setup_resources(struct udma_dev *ud)
return 0;
}
-static int pktdma_setup_resources(struct udma_dev *ud)
+static int pktdma_setup_sci_resources(struct udma_dev *ud)
{
int ret, i, j;
struct device *dev = ud->dev;
struct ti_sci_resource *rm_res, irq_res;
struct udma_tisci_rm *tisci_rm = &ud->tisci_rm;
const struct udma_oes_offsets *oes = &ud->soc_data->oes;
- u32 cap3;
-
- /* Set up the throughput level start indexes */
- cap3 = udma_read(ud->mmrs[MMR_GCFG], 0x2c);
- if (UDMA_CAP3_UCHAN_CNT(cap3)) {
- ud->tchan_tpl.levels = 3;
- ud->tchan_tpl.start_idx[1] = UDMA_CAP3_UCHAN_CNT(cap3);
- ud->tchan_tpl.start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);
- } else if (UDMA_CAP3_HCHAN_CNT(cap3)) {
- ud->tchan_tpl.levels = 2;
- ud->tchan_tpl.start_idx[0] = UDMA_CAP3_HCHAN_CNT(cap3);
- } else {
- ud->tchan_tpl.levels = 1;
- }
-
- ud->rchan_tpl.levels = ud->tchan_tpl.levels;
- ud->rchan_tpl.start_idx[0] = ud->tchan_tpl.start_idx[0];
- ud->rchan_tpl.start_idx[1] = ud->tchan_tpl.start_idx[1];
-
- ud->tchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tchan_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->tchans = devm_kcalloc(dev, ud->tchan_cnt, sizeof(*ud->tchans),
- GFP_KERNEL);
- ud->rchan_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->rchan_cnt),
- sizeof(unsigned long), GFP_KERNEL);
- ud->rchans = devm_kcalloc(dev, ud->rchan_cnt, sizeof(*ud->rchans),
- GFP_KERNEL);
- ud->rflow_in_use = devm_kcalloc(dev, BITS_TO_LONGS(ud->rflow_cnt),
- sizeof(unsigned long),
- GFP_KERNEL);
- ud->rflows = devm_kcalloc(dev, ud->rflow_cnt, sizeof(*ud->rflows),
- GFP_KERNEL);
- ud->tflow_map = devm_kmalloc_array(dev, BITS_TO_LONGS(ud->tflow_cnt),
- sizeof(unsigned long), GFP_KERNEL);
-
- if (!ud->tchan_map || !ud->rchan_map || !ud->tflow_map || !ud->tchans ||
- !ud->rchans || !ud->rflows || !ud->rflow_in_use)
- return -ENOMEM;
/* Get resource ranges from tisci */
for (i = 0; i < RM_RANGE_LAST; i++) {
@@ -2631,80 +2532,6 @@ static int pktdma_setup_resources(struct udma_dev *ud)
return 0;
}
-static int setup_resources(struct udma_dev *ud)
-{
- struct device *dev = ud->dev;
- int ch_count, ret;
-
- switch (ud->match_data->type) {
- case DMA_TYPE_UDMA:
- ret = udma_setup_resources(ud);
- break;
- case DMA_TYPE_BCDMA:
- ret = bcdma_setup_resources(ud);
- break;
- case DMA_TYPE_PKTDMA:
- ret = pktdma_setup_resources(ud);
- break;
- default:
- return -EINVAL;
- }
-
- if (ret)
- return ret;
-
- ch_count = ud->bchan_cnt + ud->tchan_cnt + ud->rchan_cnt;
- if (ud->bchan_cnt)
- ch_count -= bitmap_weight(ud->bchan_map, ud->bchan_cnt);
- ch_count -= bitmap_weight(ud->tchan_map, ud->tchan_cnt);
- ch_count -= bitmap_weight(ud->rchan_map, ud->rchan_cnt);
- if (!ch_count)
- return -ENODEV;
-
- ud->channels = devm_kcalloc(dev, ch_count, sizeof(*ud->channels),
- GFP_KERNEL);
- if (!ud->channels)
- return -ENOMEM;
-
- switch (ud->match_data->type) {
- case DMA_TYPE_UDMA:
- dev_info(dev,
- "Channels: %d (tchan: %u, rchan: %u, gp-rflow: %u)\n",
- ch_count,
- ud->tchan_cnt - bitmap_weight(ud->tchan_map,
- ud->tchan_cnt),
- ud->rchan_cnt - bitmap_weight(ud->rchan_map,
- ud->rchan_cnt),
- ud->rflow_cnt - bitmap_weight(ud->rflow_gp_map,
- ud->rflow_cnt));
- break;
- case DMA_TYPE_BCDMA:
- dev_info(dev,
- "Channels: %d (bchan: %u, tchan: %u, rchan: %u)\n",
- ch_count,
- ud->bchan_cnt - bitmap_weight(ud->bchan_map,
- ud->bchan_cnt),
- ud->tchan_cnt - bitmap_weight(ud->tchan_map,
- ud->tchan_cnt),
- ud->rchan_cnt - bitmap_weight(ud->rchan_map,
- ud->rchan_cnt));
- break;
- case DMA_TYPE_PKTDMA:
- dev_info(dev,
- "Channels: %d (tchan: %u, rchan: %u)\n",
- ch_count,
- ud->tchan_cnt - bitmap_weight(ud->tchan_map,
- ud->tchan_cnt),
- ud->rchan_cnt - bitmap_weight(ud->rchan_map,
- ud->rchan_cnt));
- break;
- default:
- break;
- }
-
- return ch_count;
-}
-
static int udma_probe(struct platform_device *pdev)
{
struct device_node *navss_node = pdev->dev.parent->of_node;
@@ -2747,6 +2574,9 @@ static int udma_probe(struct platform_device *pdev)
ud->decrement_byte_counters = udma_decrement_byte_counters;
ud->psil_pair = navss_psil_pair;
ud->psil_unpair = navss_psil_unpair;
+ ud->udma_setup_resources = udma_setup_resources;
+ ud->bcdma_setup_sci_resources = bcdma_setup_sci_resources;
+ ud->pktdma_setup_sci_resources = pktdma_setup_sci_resources;
ret = udma_get_mmrs(pdev, ud);
if (ret)
diff --git a/drivers/dma/ti/k3-udma.h b/drivers/dma/ti/k3-udma.h
index e4b512d9ffb2e..6a95eb1ece064 100644
--- a/drivers/dma/ti/k3-udma.h
+++ b/drivers/dma/ti/k3-udma.h
@@ -353,6 +353,9 @@ struct udma_dev {
u32 dst_thread);
int (*psil_unpair)(struct udma_dev *ud, u32 src_thread,
u32 dst_thread);
+ int (*udma_setup_resources)(struct udma_dev *ud);
+ int (*bcdma_setup_sci_resources)(struct udma_dev *ud);
+ int (*pktdma_setup_sci_resources)(struct udma_dev *ud);
};
struct udma_desc {
@@ -675,6 +678,11 @@ struct udma_bchan *__udma_reserve_bchan(struct udma_dev *ud, enum udma_tp_level
struct udma_tchan *__udma_reserve_tchan(struct udma_dev *ud, enum udma_tp_level tpl, int id);
struct udma_rchan *__udma_reserve_rchan(struct udma_dev *ud, enum udma_tp_level tpl, int id);
+int udma_setup_resources(struct udma_dev *ud);
+int bcdma_setup_resources(struct udma_dev *ud);
+int pktdma_setup_resources(struct udma_dev *ud);
+int setup_resources(struct udma_dev *ud);
+
/* Direct access to UDMA low lever resources for the glue layer */
int xudma_navss_psil_pair(struct udma_dev *ud, u32 src_thread, u32 dst_thread);
int xudma_navss_psil_unpair(struct udma_dev *ud, u32 src_thread,
--
2.53.0
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