* [PATCH v8 01/14] iommu/rockchip: Prohibit unbind and remove
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 03/14] iommu/rockchip: Request irqs in rk_iommu_probe() Jeffy Chen
` (8 subsequent siblings)
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
Removal of IOMMUs cannot be done reliably.
This is similar to exynos iommu driver.
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Acked-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8:
Rebase on newest for-next.
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4:
Rewrite commit message.
Changes in v3:
Also remove remove() and module_exit() as Tomasz suggested.
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 21 +--------------------
1 file changed, 1 insertion(+), 20 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 6a3719e118da..e7fb824d123e 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1197,18 +1197,6 @@ static int rk_iommu_probe(struct platform_device *pdev)
return err;
}
-static int rk_iommu_remove(struct platform_device *pdev)
-{
- struct rk_iommu *iommu = platform_get_drvdata(pdev);
-
- if (iommu) {
- iommu_device_sysfs_remove(&iommu->iommu);
- iommu_device_unregister(&iommu->iommu);
- }
-
- return 0;
-}
-
static void rk_iommu_shutdown(struct platform_device *pdev)
{
struct rk_iommu *iommu = platform_get_drvdata(pdev);
@@ -1234,11 +1222,11 @@ MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids);
static struct platform_driver rk_iommu_driver = {
.probe = rk_iommu_probe,
- .remove = rk_iommu_remove,
.shutdown = rk_iommu_shutdown,
.driver = {
.name = "rk_iommu",
.of_match_table = rk_iommu_dt_ids,
+ .suppress_bind_attrs = true,
},
};
@@ -1266,14 +1254,7 @@ static int __init rk_iommu_init(void)
platform_driver_unregister(&rk_iommu_domain_driver);
return ret;
}
-static void __exit rk_iommu_exit(void)
-{
- platform_driver_unregister(&rk_iommu_driver);
- platform_driver_unregister(&rk_iommu_domain_driver);
-}
-
subsys_initcall(rk_iommu_init);
-module_exit(rk_iommu_exit);
MODULE_DESCRIPTION("IOMMU API for Rockchip");
MODULE_AUTHOR("Simon Xue <xxm-TNX95d0MmH7DzftRWevZcw@public.gmane.org> and Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>");
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 03/14] iommu/rockchip: Request irqs in rk_iommu_probe()
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2018-03-23 7:38 ` [PATCH v8 01/14] iommu/rockchip: Prohibit unbind and remove Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 05/14] iommu/rockchip: Use iopoll helpers to wait for hardware Jeffy Chen
` (7 subsequent siblings)
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
Move request_irq to the end of rk_iommu_probe().
Suggested-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Acked-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
Loop platform_get_irq() as Robin suggested.
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 38 +++++++++-----------------------------
1 file changed, 9 insertions(+), 29 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 73117dbe839e..ec3ff936aa60 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -90,8 +90,6 @@ struct rk_iommu {
struct device *dev;
void __iomem **bases;
int num_mmu;
- int *irq;
- int num_irq;
bool reset_disabled;
struct iommu_device iommu;
struct list_head node; /* entry in rk_iommu_domain.iommus */
@@ -830,13 +828,6 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
iommu->domain = domain;
- for (i = 0; i < iommu->num_irq; i++) {
- ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq,
- IRQF_SHARED, dev_name(dev), iommu);
- if (ret)
- return ret;
- }
-
for (i = 0; i < iommu->num_mmu; i++) {
rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
rk_domain->dt_dma);
@@ -885,9 +876,6 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
}
rk_iommu_disable_stall(iommu);
- for (i = 0; i < iommu->num_irq; i++)
- devm_free_irq(iommu->dev, iommu->irq[i], iommu);
-
iommu->domain = NULL;
dev_dbg(dev, "Detached from iommu domain\n");
@@ -1138,7 +1126,7 @@ static int rk_iommu_probe(struct platform_device *pdev)
struct rk_iommu *iommu;
struct resource *res;
int num_res = pdev->num_resources;
- int err, i;
+ int err, i, irq;
iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
if (!iommu)
@@ -1165,23 +1153,15 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (iommu->num_mmu == 0)
return PTR_ERR(iommu->bases[0]);
- iommu->num_irq = platform_irq_count(pdev);
- if (iommu->num_irq < 0)
- return iommu->num_irq;
- if (iommu->num_irq == 0)
- return -ENXIO;
+ i = 0;
+ while ((irq = platform_get_irq(pdev, i++)) != -ENXIO) {
+ if (irq < 0)
+ return irq;
- iommu->irq = devm_kcalloc(dev, iommu->num_irq, sizeof(*iommu->irq),
- GFP_KERNEL);
- if (!iommu->irq)
- return -ENOMEM;
-
- for (i = 0; i < iommu->num_irq; i++) {
- iommu->irq[i] = platform_get_irq(pdev, i);
- if (iommu->irq[i] < 0) {
- dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq[i]);
- return -ENXIO;
- }
+ err = devm_request_irq(iommu->dev, irq, rk_iommu_irq,
+ IRQF_SHARED, dev_name(dev), iommu);
+ if (err)
+ return err;
}
iommu->reset_disabled = device_property_read_bool(dev,
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 05/14] iommu/rockchip: Use iopoll helpers to wait for hardware
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2018-03-23 7:38 ` [PATCH v8 01/14] iommu/rockchip: Prohibit unbind and remove Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 03/14] iommu/rockchip: Request irqs in rk_iommu_probe() Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 06/14] iommu/rockchip: Fix TLB flush of secondary IOMMUs Jeffy Chen
` (6 subsequent siblings)
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
From: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
This patch converts the rockchip-iommu driver to use the in-kernel
iopoll helpers to wait for certain status bits to change in registers
instead of an open-coded custom macro.
Signed-off-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5:
Use RK_MMU_POLL_PERIOD_US instead of 100.
Changes in v4: None
Changes in v3: None
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 75 ++++++++++++++++++++++--------------------
1 file changed, 39 insertions(+), 36 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 5cbd5ceeb039..7130d92ff79c 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -13,7 +13,7 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
-#include <linux/jiffies.h>
+#include <linux/iopoll.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
@@ -36,7 +36,10 @@
#define RK_MMU_AUTO_GATING 0x24
#define DTE_ADDR_DUMMY 0xCAFEBABE
-#define FORCE_RESET_TIMEOUT 100 /* ms */
+
+#define RK_MMU_POLL_PERIOD_US 100
+#define RK_MMU_FORCE_RESET_TIMEOUT_US 100000
+#define RK_MMU_POLL_TIMEOUT_US 1000
/* RK_MMU_STATUS fields */
#define RK_MMU_STATUS_PAGING_ENABLED BIT(0)
@@ -73,8 +76,6 @@
*/
#define RK_IOMMU_PGSIZE_BITMAP 0x007ff000
-#define IOMMU_REG_POLL_COUNT_FAST 1000
-
struct rk_iommu_domain {
struct list_head iommus;
struct platform_device *pdev;
@@ -109,27 +110,6 @@ static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom)
return container_of(dom, struct rk_iommu_domain, domain);
}
-/**
- * Inspired by _wait_for in intel_drv.h
- * This is NOT safe for use in interrupt context.
- *
- * Note that it's important that we check the condition again after having
- * timed out, since the timeout could be due to preemption or similar and
- * we've never had a chance to check the condition before the timeout.
- */
-#define rk_wait_for(COND, MS) ({ \
- unsigned long timeout__ = jiffies + msecs_to_jiffies(MS) + 1; \
- int ret__ = 0; \
- while (!(COND)) { \
- if (time_after(jiffies, timeout__)) { \
- ret__ = (COND) ? 0 : -ETIMEDOUT; \
- break; \
- } \
- usleep_range(50, 100); \
- } \
- ret__; \
-})
-
/*
* The Rockchip rk3288 iommu uses a 2-level page table.
* The first level is the "Directory Table" (DT).
@@ -333,9 +313,21 @@ static bool rk_iommu_is_paging_enabled(struct rk_iommu *iommu)
return enable;
}
+static bool rk_iommu_is_reset_done(struct rk_iommu *iommu)
+{
+ bool done = true;
+ int i;
+
+ for (i = 0; i < iommu->num_mmu; i++)
+ done &= rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR) == 0;
+
+ return done;
+}
+
static int rk_iommu_enable_stall(struct rk_iommu *iommu)
{
int ret, i;
+ bool val;
if (rk_iommu_is_stall_active(iommu))
return 0;
@@ -346,7 +338,9 @@ static int rk_iommu_enable_stall(struct rk_iommu *iommu)
rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_STALL);
- ret = rk_wait_for(rk_iommu_is_stall_active(iommu), 1);
+ ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,
+ val, RK_MMU_POLL_PERIOD_US,
+ RK_MMU_POLL_TIMEOUT_US);
if (ret)
for (i = 0; i < iommu->num_mmu; i++)
dev_err(iommu->dev, "Enable stall request timed out, status: %#08x\n",
@@ -358,13 +352,16 @@ static int rk_iommu_enable_stall(struct rk_iommu *iommu)
static int rk_iommu_disable_stall(struct rk_iommu *iommu)
{
int ret, i;
+ bool val;
if (!rk_iommu_is_stall_active(iommu))
return 0;
rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_STALL);
- ret = rk_wait_for(!rk_iommu_is_stall_active(iommu), 1);
+ ret = readx_poll_timeout(rk_iommu_is_stall_active, iommu, val,
+ !val, RK_MMU_POLL_PERIOD_US,
+ RK_MMU_POLL_TIMEOUT_US);
if (ret)
for (i = 0; i < iommu->num_mmu; i++)
dev_err(iommu->dev, "Disable stall request timed out, status: %#08x\n",
@@ -376,13 +373,16 @@ static int rk_iommu_disable_stall(struct rk_iommu *iommu)
static int rk_iommu_enable_paging(struct rk_iommu *iommu)
{
int ret, i;
+ bool val;
if (rk_iommu_is_paging_enabled(iommu))
return 0;
rk_iommu_command(iommu, RK_MMU_CMD_ENABLE_PAGING);
- ret = rk_wait_for(rk_iommu_is_paging_enabled(iommu), 1);
+ ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val,
+ val, RK_MMU_POLL_PERIOD_US,
+ RK_MMU_POLL_TIMEOUT_US);
if (ret)
for (i = 0; i < iommu->num_mmu; i++)
dev_err(iommu->dev, "Enable paging request timed out, status: %#08x\n",
@@ -394,13 +394,16 @@ static int rk_iommu_enable_paging(struct rk_iommu *iommu)
static int rk_iommu_disable_paging(struct rk_iommu *iommu)
{
int ret, i;
+ bool val;
if (!rk_iommu_is_paging_enabled(iommu))
return 0;
rk_iommu_command(iommu, RK_MMU_CMD_DISABLE_PAGING);
- ret = rk_wait_for(!rk_iommu_is_paging_enabled(iommu), 1);
+ ret = readx_poll_timeout(rk_iommu_is_paging_enabled, iommu, val,
+ !val, RK_MMU_POLL_PERIOD_US,
+ RK_MMU_POLL_TIMEOUT_US);
if (ret)
for (i = 0; i < iommu->num_mmu; i++)
dev_err(iommu->dev, "Disable paging request timed out, status: %#08x\n",
@@ -413,6 +416,7 @@ static int rk_iommu_force_reset(struct rk_iommu *iommu)
{
int ret, i;
u32 dte_addr;
+ bool val;
if (iommu->reset_disabled)
return 0;
@@ -433,13 +437,12 @@ static int rk_iommu_force_reset(struct rk_iommu *iommu)
rk_iommu_command(iommu, RK_MMU_CMD_FORCE_RESET);
- for (i = 0; i < iommu->num_mmu; i++) {
- ret = rk_wait_for(rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR) == 0x00000000,
- FORCE_RESET_TIMEOUT);
- if (ret) {
- dev_err(iommu->dev, "FORCE_RESET command timed out\n");
- return ret;
- }
+ ret = readx_poll_timeout(rk_iommu_is_reset_done, iommu, val,
+ val, RK_MMU_FORCE_RESET_TIMEOUT_US,
+ RK_MMU_POLL_TIMEOUT_US);
+ if (ret) {
+ dev_err(iommu->dev, "FORCE_RESET command timed out\n");
+ return ret;
}
return 0;
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 06/14] iommu/rockchip: Fix TLB flush of secondary IOMMUs
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (2 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 05/14] iommu/rockchip: Use iopoll helpers to wait for hardware Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 09/14] dt-bindings: iommu/rockchip: Add clock property Jeffy Chen
` (5 subsequent siblings)
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
From: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Due to the bug in current code, only first IOMMU has the TLB lines
flushed in rk_iommu_zap_lines. This patch fixes the inner loop to
execute for all IOMMUs and properly flush the TLB.
Signed-off-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 7130d92ff79c..c3df53e480ea 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -274,19 +274,21 @@ static void rk_iommu_base_command(void __iomem *base, u32 command)
{
writel(command, base + RK_MMU_COMMAND);
}
-static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova,
+static void rk_iommu_zap_lines(struct rk_iommu *iommu, dma_addr_t iova_start,
size_t size)
{
int i;
-
- dma_addr_t iova_end = iova + size;
+ dma_addr_t iova_end = iova_start + size;
/*
* TODO(djkurtz): Figure out when it is more efficient to shootdown the
* entire iotlb rather than iterate over individual iovas.
*/
- for (i = 0; i < iommu->num_mmu; i++)
- for (; iova < iova_end; iova += SPAGE_SIZE)
+ for (i = 0; i < iommu->num_mmu; i++) {
+ dma_addr_t iova;
+
+ for (iova = iova_start; iova < iova_end; iova += SPAGE_SIZE)
rk_iommu_write(iommu->bases[i], RK_MMU_ZAP_ONE_LINE, iova);
+ }
}
static bool rk_iommu_is_stall_active(struct rk_iommu *iommu)
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 09/14] dt-bindings: iommu/rockchip: Add clock property
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (3 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 06/14] iommu/rockchip: Fix TLB flush of secondary IOMMUs Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
[not found] ` <20180323073814.5802-10-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2018-03-23 7:38 ` [PATCH v8 10/14] iommu/rockchip: Use IOMMU device for dma mapping operations Jeffy Chen
` (4 subsequent siblings)
9 siblings, 1 reply; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Mark Rutland, devicetree-u79uwXL29TY76Z2rM5mHXA, Jeffy Chen,
jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA, Rob Herring,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
Add clock property, since we are going to control clocks in rockchip
iommu driver.
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
Documentation/devicetree/bindings/iommu/rockchip,iommu.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
index 2098f7732264..6ecefea1c6f9 100644
--- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
+++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
@@ -14,6 +14,11 @@ Required properties:
"single-master" device, and needs no additional information
to associate with its master device. See:
Documentation/devicetree/bindings/iommu/iommu.txt
+- clocks : A list of clocks required for the IOMMU to be accessible by
+ the host CPU.
+- clock-names : Should contain the following:
+ "iface" - Main peripheral bus clock (PCLK/HCL) (required)
+ "aclk" - AXI bus clock (required)
Optional properties:
- rockchip,disable-mmu-reset : Don't use the mmu reset operation.
@@ -27,5 +32,7 @@ Example:
reg = <0xff940300 0x100>;
interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "vopl_mmu";
+ clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
+ clock-names = "aclk", "iface";
#iommu-cells = <0>;
};
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 10/14] iommu/rockchip: Use IOMMU device for dma mapping operations
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (4 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 09/14] dt-bindings: iommu/rockchip: Add clock property Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 11/14] iommu/rockchip: Use OF_IOMMU to attach devices automatically Jeffy Chen
` (3 subsequent siblings)
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
Use the first registered IOMMU device for dma mapping operations, and
drop the domain platform device.
This is similar to exynos iommu driver.
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 85 ++++++++++++------------------------------
1 file changed, 24 insertions(+), 61 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 50ab9fd4eeb0..7970d21b9858 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -79,7 +79,6 @@
struct rk_iommu_domain {
struct list_head iommus;
- struct platform_device *pdev;
u32 *dt; /* page directory table */
dma_addr_t dt_dma;
spinlock_t iommus_lock; /* lock for iommus list */
@@ -105,12 +104,14 @@ struct rk_iommu {
struct iommu_domain *domain; /* domain to which iommu is attached */
};
+static struct device *dma_dev;
+
static inline void rk_table_flush(struct rk_iommu_domain *dom, dma_addr_t dma,
unsigned int count)
{
size_t size = count * sizeof(u32); /* count of u32 entry */
- dma_sync_single_for_device(&dom->pdev->dev, dma, size, DMA_TO_DEVICE);
+ dma_sync_single_for_device(dma_dev, dma, size, DMA_TO_DEVICE);
}
static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom)
@@ -625,7 +626,6 @@ static void rk_iommu_zap_iova_first_last(struct rk_iommu_domain *rk_domain,
static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
dma_addr_t iova)
{
- struct device *dev = &rk_domain->pdev->dev;
u32 *page_table, *dte_addr;
u32 dte_index, dte;
phys_addr_t pt_phys;
@@ -643,9 +643,9 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
if (!page_table)
return ERR_PTR(-ENOMEM);
- pt_dma = dma_map_single(dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
- if (dma_mapping_error(dev, pt_dma)) {
- dev_err(dev, "DMA mapping error while allocating page table\n");
+ pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
+ if (dma_mapping_error(dma_dev, pt_dma)) {
+ dev_err(dma_dev, "DMA mapping error while allocating page table\n");
free_page((unsigned long)page_table);
return ERR_PTR(-ENOMEM);
}
@@ -911,29 +911,20 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
{
struct rk_iommu_domain *rk_domain;
- struct platform_device *pdev;
- struct device *iommu_dev;
if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA)
return NULL;
- /* Register a pdev per domain, so DMA API can base on this *dev
- * even some virtual master doesn't have an iommu slave
- */
- pdev = platform_device_register_simple("rk_iommu_domain",
- PLATFORM_DEVID_AUTO, NULL, 0);
- if (IS_ERR(pdev))
+ if (!dma_dev)
return NULL;
- rk_domain = devm_kzalloc(&pdev->dev, sizeof(*rk_domain), GFP_KERNEL);
+ rk_domain = devm_kzalloc(dma_dev, sizeof(*rk_domain), GFP_KERNEL);
if (!rk_domain)
- goto err_unreg_pdev;
-
- rk_domain->pdev = pdev;
+ return NULL;
if (type == IOMMU_DOMAIN_DMA &&
iommu_get_dma_cookie(&rk_domain->domain))
- goto err_unreg_pdev;
+ return NULL;
/*
* rk32xx iommus use a 2 level pagetable.
@@ -944,11 +935,10 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
if (!rk_domain->dt)
goto err_put_cookie;
- iommu_dev = &pdev->dev;
- rk_domain->dt_dma = dma_map_single(iommu_dev, rk_domain->dt,
+ rk_domain->dt_dma = dma_map_single(dma_dev, rk_domain->dt,
SPAGE_SIZE, DMA_TO_DEVICE);
- if (dma_mapping_error(iommu_dev, rk_domain->dt_dma)) {
- dev_err(iommu_dev, "DMA map error for DT\n");
+ if (dma_mapping_error(dma_dev, rk_domain->dt_dma)) {
+ dev_err(dma_dev, "DMA map error for DT\n");
goto err_free_dt;
}
@@ -969,8 +959,6 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
err_put_cookie:
if (type == IOMMU_DOMAIN_DMA)
iommu_put_dma_cookie(&rk_domain->domain);
-err_unreg_pdev:
- platform_device_unregister(pdev);
return NULL;
}
@@ -987,20 +975,18 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
if (rk_dte_is_pt_valid(dte)) {
phys_addr_t pt_phys = rk_dte_pt_address(dte);
u32 *page_table = phys_to_virt(pt_phys);
- dma_unmap_single(&rk_domain->pdev->dev, pt_phys,
+ dma_unmap_single(dma_dev, pt_phys,
SPAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)page_table);
}
}
- dma_unmap_single(&rk_domain->pdev->dev, rk_domain->dt_dma,
+ dma_unmap_single(dma_dev, rk_domain->dt_dma,
SPAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)rk_domain->dt);
if (domain->type == IOMMU_DOMAIN_DMA)
iommu_put_dma_cookie(&rk_domain->domain);
-
- platform_device_unregister(rk_domain->pdev);
}
static bool rk_iommu_is_dev_iommu_master(struct device *dev)
@@ -1123,30 +1109,6 @@ static const struct iommu_ops rk_iommu_ops = {
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
};
-static int rk_iommu_domain_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
-
- dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms), GFP_KERNEL);
- if (!dev->dma_parms)
- return -ENOMEM;
-
- /* Set dma_ops for dev, otherwise it would be dummy_dma_ops */
- arch_setup_dma_ops(dev, 0, DMA_BIT_MASK(32), NULL, false);
-
- dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
- dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32));
-
- return 0;
-}
-
-static struct platform_driver rk_iommu_domain_driver = {
- .probe = rk_iommu_domain_probe,
- .driver = {
- .name = "rk_iommu_domain",
- },
-};
-
static int rk_iommu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1220,6 +1182,14 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (err)
goto err_remove_sysfs;
+ /*
+ * Use the first registered IOMMU device for domain to use with DMA
+ * API, since a domain might not physically correspond to a single
+ * IOMMU device..
+ */
+ if (!dma_dev)
+ dma_dev = &pdev->dev;
+
return 0;
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);
@@ -1276,14 +1246,7 @@ static int __init rk_iommu_init(void)
if (ret)
return ret;
- ret = platform_driver_register(&rk_iommu_domain_driver);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&rk_iommu_driver);
- if (ret)
- platform_driver_unregister(&rk_iommu_domain_driver);
- return ret;
+ return platform_driver_register(&rk_iommu_driver);
}
subsys_initcall(rk_iommu_init);
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 11/14] iommu/rockchip: Use OF_IOMMU to attach devices automatically
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (5 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 10/14] iommu/rockchip: Use IOMMU device for dma mapping operations Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
[not found] ` <20180323073814.5802-12-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
2018-03-23 7:38 ` [PATCH v8 12/14] iommu/rockchip: Fix error handling in init Jeffy Chen
` (2 subsequent siblings)
9 siblings, 1 reply; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
Converts the rockchip-iommu driver to use the OF_IOMMU infrastructure,
which allows attaching master devices to their IOMMUs automatically
according to DT properties.
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
Add struct rk_iommudata.
Squash iommu/rockchip: Use iommu_group_get_for_dev() for add_device
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 135 ++++++++++++-----------------------------
1 file changed, 40 insertions(+), 95 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 7970d21b9858..bd8580b897e9 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -19,6 +19,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_iommu.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -104,6 +105,10 @@ struct rk_iommu {
struct iommu_domain *domain; /* domain to which iommu is attached */
};
+struct rk_iommudata {
+ struct rk_iommu *iommu;
+};
+
static struct device *dma_dev;
static inline void rk_table_flush(struct rk_iommu_domain *dom, dma_addr_t dma,
@@ -807,18 +812,9 @@ static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova,
static struct rk_iommu *rk_iommu_from_dev(struct device *dev)
{
- struct iommu_group *group;
- struct device *iommu_dev;
- struct rk_iommu *rk_iommu;
+ struct rk_iommudata *data = dev->archdata.iommu;
- group = iommu_group_get(dev);
- if (!group)
- return NULL;
- iommu_dev = iommu_group_get_iommudata(group);
- rk_iommu = dev_get_drvdata(iommu_dev);
- iommu_group_put(group);
-
- return rk_iommu;
+ return data ? data->iommu : NULL;
}
static int rk_iommu_attach_device(struct iommu_domain *domain,
@@ -989,110 +985,53 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
iommu_put_dma_cookie(&rk_domain->domain);
}
-static bool rk_iommu_is_dev_iommu_master(struct device *dev)
-{
- struct device_node *np = dev->of_node;
- int ret;
-
- /*
- * An iommu master has an iommus property containing a list of phandles
- * to iommu nodes, each with an #iommu-cells property with value 0.
- */
- ret = of_count_phandle_with_args(np, "iommus", "#iommu-cells");
- return (ret > 0);
-}
-
-static int rk_iommu_group_set_iommudata(struct iommu_group *group,
- struct device *dev)
+static int rk_iommu_add_device(struct device *dev)
{
- struct device_node *np = dev->of_node;
- struct platform_device *pd;
- int ret;
- struct of_phandle_args args;
+ struct iommu_group *group;
+ struct rk_iommu *iommu;
- /*
- * An iommu master has an iommus property containing a list of phandles
- * to iommu nodes, each with an #iommu-cells property with value 0.
- */
- ret = of_parse_phandle_with_args(np, "iommus", "#iommu-cells", 0,
- &args);
- if (ret) {
- dev_err(dev, "of_parse_phandle_with_args(%pOF) => %d\n",
- np, ret);
- return ret;
- }
- if (args.args_count != 0) {
- dev_err(dev, "incorrect number of iommu params found for %pOF (found %d, expected 0)\n",
- args.np, args.args_count);
- return -EINVAL;
- }
+ iommu = rk_iommu_from_dev(dev);
+ if (!iommu)
+ return -ENODEV;
- pd = of_find_device_by_node(args.np);
- of_node_put(args.np);
- if (!pd) {
- dev_err(dev, "iommu %pOF not found\n", args.np);
- return -EPROBE_DEFER;
- }
+ group = iommu_group_get_for_dev(dev);
+ if (IS_ERR(group))
+ return PTR_ERR(group);
+ iommu_group_put(group);
- /* TODO(djkurtz): handle multiple slave iommus for a single master */
- iommu_group_set_iommudata(group, &pd->dev, NULL);
+ iommu_device_link(&iommu->iommu, dev);
return 0;
}
-static int rk_iommu_add_device(struct device *dev)
+static void rk_iommu_remove_device(struct device *dev)
{
- struct iommu_group *group;
struct rk_iommu *iommu;
- int ret;
-
- if (!rk_iommu_is_dev_iommu_master(dev))
- return -ENODEV;
-
- group = iommu_group_get(dev);
- if (!group) {
- group = iommu_group_alloc();
- if (IS_ERR(group)) {
- dev_err(dev, "Failed to allocate IOMMU group\n");
- return PTR_ERR(group);
- }
- }
-
- ret = iommu_group_add_device(group, dev);
- if (ret)
- goto err_put_group;
-
- ret = rk_iommu_group_set_iommudata(group, dev);
- if (ret)
- goto err_remove_device;
iommu = rk_iommu_from_dev(dev);
- if (iommu)
- iommu_device_link(&iommu->iommu, dev);
- iommu_group_put(group);
-
- return 0;
-
-err_remove_device:
+ iommu_device_unlink(&iommu->iommu, dev);
iommu_group_remove_device(dev);
-err_put_group:
- iommu_group_put(group);
- return ret;
}
-static void rk_iommu_remove_device(struct device *dev)
+static int rk_iommu_of_xlate(struct device *dev,
+ struct of_phandle_args *args)
{
- struct rk_iommu *iommu;
+ struct platform_device *iommu_dev;
+ struct rk_iommudata *data;
- if (!rk_iommu_is_dev_iommu_master(dev))
- return;
+ data = devm_kzalloc(dma_dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- iommu = rk_iommu_from_dev(dev);
- if (iommu)
- iommu_device_unlink(&iommu->iommu, dev);
+ iommu_dev = of_find_device_by_node(args->np);
- iommu_group_remove_device(dev);
+ data->iommu = platform_get_drvdata(iommu_dev);
+ dev->archdata.iommu = data;
+
+ of_dev_put(iommu_dev);
+
+ return 0;
}
static const struct iommu_ops rk_iommu_ops = {
@@ -1106,7 +1045,9 @@ static const struct iommu_ops rk_iommu_ops = {
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,
+ .device_group = generic_device_group,
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
+ .of_xlate = rk_iommu_of_xlate,
};
static int rk_iommu_probe(struct platform_device *pdev)
@@ -1178,6 +1119,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
goto err_unprepare_clocks;
iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
+ iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
+
err = iommu_device_register(&iommu->iommu);
if (err)
goto err_remove_sysfs;
@@ -1250,6 +1193,8 @@ static int __init rk_iommu_init(void)
}
subsys_initcall(rk_iommu_init);
+IOMMU_OF_DECLARE(rk_iommu_of, "rockchip,iommu");
+
MODULE_DESCRIPTION("IOMMU API for Rockchip");
MODULE_AUTHOR("Simon Xue <xxm-TNX95d0MmH7DzftRWevZcw@public.gmane.org> and Daniel Kurtz <djkurtz-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>");
MODULE_ALIAS("platform:rockchip-iommu");
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 12/14] iommu/rockchip: Fix error handling in init
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (6 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 11/14] iommu/rockchip: Use OF_IOMMU to attach devices automatically Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-23 7:38 ` [PATCH v8 14/14] iommu/rockchip: Support sharing IOMMU between masters Jeffy Chen
2018-03-29 10:24 ` [PATCH v8 00/14] iommu/rockchip: Use OF_IOMMU Joerg Roedel
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
It's hard to undo bus_set_iommu() in the error path, so move it to the
end of rk_iommu_probe().
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2:
Move bus_set_iommu() to rk_iommu_probe().
drivers/iommu/rockchip-iommu.c | 15 ++-------------
1 file changed, 2 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index bd8580b897e9..0ce5e8a0658c 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -1133,6 +1133,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (!dma_dev)
dma_dev = &pdev->dev;
+ bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
+
return 0;
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);
@@ -1176,19 +1178,6 @@ static struct platform_driver rk_iommu_driver = {
static int __init rk_iommu_init(void)
{
- struct device_node *np;
- int ret;
-
- np = of_find_matching_node(NULL, rk_iommu_dt_ids);
- if (!np)
- return 0;
-
- of_node_put(np);
-
- ret = bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
- if (ret)
- return ret;
-
return platform_driver_register(&rk_iommu_driver);
}
subsys_initcall(rk_iommu_init);
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* [PATCH v8 14/14] iommu/rockchip: Support sharing IOMMU between masters
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (7 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 12/14] iommu/rockchip: Fix error handling in init Jeffy Chen
@ 2018-03-23 7:38 ` Jeffy Chen
2018-03-29 10:24 ` [PATCH v8 00/14] iommu/rockchip: Use OF_IOMMU Joerg Roedel
9 siblings, 0 replies; 18+ messages in thread
From: Jeffy Chen @ 2018-03-23 7:38 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Jeffy Chen, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Heiko Stuebner
There would be some masters sharing the same IOMMU device. Put them in
the same iommu group and share the same iommu domain.
Signed-off-by: Jeffy Chen <jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
Reviewed-by: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
---
Changes in v8: None
Changes in v7:
Use iommu_group_ref_get to avoid ref leak
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3:
Remove rk_iommudata->domain.
Changes in v2: None
drivers/iommu/rockchip-iommu.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 9f6f74689464..5fc8656c60f9 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -104,6 +104,7 @@ struct rk_iommu {
struct iommu_device iommu;
struct list_head node; /* entry in rk_iommu_domain.iommus */
struct iommu_domain *domain; /* domain to which iommu is attached */
+ struct iommu_group *group;
};
struct rk_iommudata {
@@ -1073,6 +1074,15 @@ static void rk_iommu_remove_device(struct device *dev)
iommu_group_remove_device(dev);
}
+static struct iommu_group *rk_iommu_device_group(struct device *dev)
+{
+ struct rk_iommu *iommu;
+
+ iommu = rk_iommu_from_dev(dev);
+
+ return iommu_group_ref_get(iommu->group);
+}
+
static int rk_iommu_of_xlate(struct device *dev,
struct of_phandle_args *args)
{
@@ -1104,7 +1114,7 @@ static const struct iommu_ops rk_iommu_ops = {
.add_device = rk_iommu_add_device,
.remove_device = rk_iommu_remove_device,
.iova_to_phys = rk_iommu_iova_to_phys,
- .device_group = generic_device_group,
+ .device_group = rk_iommu_device_group,
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
.of_xlate = rk_iommu_of_xlate,
};
@@ -1173,9 +1183,15 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (err)
return err;
+ iommu->group = iommu_group_alloc();
+ if (IS_ERR(iommu->group)) {
+ err = PTR_ERR(iommu->group);
+ goto err_unprepare_clocks;
+ }
+
err = iommu_device_sysfs_add(&iommu->iommu, dev, NULL, dev_name(dev));
if (err)
- goto err_unprepare_clocks;
+ goto err_put_group;
iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
@@ -1199,6 +1215,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
return 0;
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);
+err_put_group:
+ iommu_group_put(iommu->group);
err_unprepare_clocks:
clk_bulk_unprepare(iommu->num_clocks, iommu->clocks);
return err;
--
2.11.0
^ permalink raw reply related [flat|nested] 18+ messages in thread* Re: [PATCH v8 00/14] iommu/rockchip: Use OF_IOMMU
[not found] ` <20180323073814.5802-1-jeffy.chen-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
` (8 preceding siblings ...)
2018-03-23 7:38 ` [PATCH v8 14/14] iommu/rockchip: Support sharing IOMMU between masters Jeffy Chen
@ 2018-03-29 10:24 ` Joerg Roedel
9 siblings, 0 replies; 18+ messages in thread
From: Joerg Roedel @ 2018-03-29 10:24 UTC (permalink / raw)
To: Jeffy Chen
Cc: Mark Rutland, Heiko Stuebner, Catalin Marinas, Shawn Lin,
Will Deacon, Kever Yang, Finley Xiao, Romain Perier, Sugar Zhang,
Brian Norris, Russell King, jcliang-F7+t8E8rja9g9hUCZPvPmw,
linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r, Nickey Yang,
Jacob Chen, Liang Chen, Caesar Wang,
devicetree-u79uwXL29TY76Z2rM5mHXA, Arnd Bergmann, Rob Herring,
Mark Yao, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
David Wu <dav>
On Fri, Mar 23, 2018 at 03:38:00PM +0800, Jeffy Chen wrote:
>
> This series fixes some issues in rockchip iommu driver, and add of_iommu
> support in it.
>
> Changes in v8:
> Rebase on newest for-next.
> Don't introduce the additional return.
> Rename startup()/shutdown() to enable()/disable().
> Do runtime PM suspend in .shutdown().
> Modify pm_runtime_get_if_in_use()/pm_runtime_put() as Tomasz suggested.
Applied, thanks.
^ permalink raw reply [flat|nested] 18+ messages in thread