* [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs
@ 2021-12-09 20:47 Jim Quinlan
2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan
` (3 more replies)
0 siblings, 4 replies; 11+ messages in thread
From: Jim Quinlan @ 2021-12-09 20:47 UTC (permalink / raw)
To: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas,
Kevin Cernekee, bcm-kernel-feedback-list, jim2101024,
james.quinlan
Cc: open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
Krzysztof Wilczyński,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
open list,
moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE,
Rob Herring, Saenz Julienne
With this patchset, the Broadcom STB PCIe controller driver
supports Arm, Arm64, and now MIPs.
Jim Quinlan (4):
dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs
MIPS: bmips: Add support PCIe controller device nodes
MIPS: bmips: Remove obsolete DMA mapping support
PCI: brcmstb: Augment driver for MIPs SOCs
.../bindings/pci/brcm,stb-pcie.yaml | 2 +
arch/mips/Kconfig | 1 -
arch/mips/bmips/dma.c | 106 +-----------------
arch/mips/boot/dts/brcm/bcm7425.dtsi | 30 +++++
arch/mips/boot/dts/brcm/bcm7435.dtsi | 30 +++++
arch/mips/boot/dts/brcm/bcm97425svmb.dts | 9 ++
arch/mips/boot/dts/brcm/bcm97435svmb.dts | 9 ++
drivers/pci/controller/Kconfig | 2 +-
drivers/pci/controller/pcie-brcmstb.c | 82 +++++++++++++-
9 files changed, 161 insertions(+), 110 deletions(-)
base-commit: ded746bfc94398d2ee9de315a187677b207b2004
prerequisite-patch-id: d47ce1906f7e175cc394be96f85a6eade86a9097
--
2.17.1
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^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs 2021-12-09 20:47 [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs Jim Quinlan @ 2021-12-09 20:47 ` Jim Quinlan 2021-12-09 21:29 ` Florian Fainelli 2021-12-15 19:50 ` Rob Herring 2021-12-09 20:47 ` [PATCH v1 4/4] PCI: brcmstb: Augment driver for " Jim Quinlan ` (2 subsequent siblings) 3 siblings, 2 replies; 11+ messages in thread From: Jim Quinlan @ 2021-12-09 20:47 UTC (permalink / raw) To: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, jim2101024, james.quinlan Cc: Florian Fainelli, Rob Herring, Saenz Julienne, moderated list:BROADCOM BCM7XXX ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, open list The Broadcom STB Arm and MIPs SOCs use the same PCIe controller HW, although the MIPs version is older. Signed-off-by: Jim Quinlan <jim2101024@gmail.com> --- Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml index 1fe102743f82..043412e7735f 100644 --- a/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml @@ -19,6 +19,8 @@ properties: - brcm,bcm7278-pcie # Broadcom 7278 Arm - brcm,bcm7216-pcie # Broadcom 7216 Arm - brcm,bcm7445-pcie # Broadcom 7445 Arm + - brcm,bcm7425-pcie # Broadcom 7425 MIPs + - brcm,bcm7435-pcie # Broadcom 7435 MIPs reg: maxItems: 1 -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs 2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan @ 2021-12-09 21:29 ` Florian Fainelli 2021-12-15 19:50 ` Rob Herring 1 sibling, 0 replies; 11+ messages in thread From: Florian Fainelli @ 2021-12-09 21:29 UTC (permalink / raw) To: Jim Quinlan, linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, james.quinlan Cc: Florian Fainelli, Rob Herring, Saenz Julienne, moderated list:BROADCOM BCM7XXX ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, open list On 12/9/21 12:47 PM, Jim Quinlan wrote: > The Broadcom STB Arm and MIPs SOCs use the same PCIe controller > HW, although the MIPs version is older. > > Signed-off-by: Jim Quinlan <jim2101024@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs 2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan 2021-12-09 21:29 ` Florian Fainelli @ 2021-12-15 19:50 ` Rob Herring 1 sibling, 0 replies; 11+ messages in thread From: Rob Herring @ 2021-12-15 19:50 UTC (permalink / raw) To: Jim Quinlan Cc: bcm-kernel-feedback-list, Florian Fainelli, devicetree, Kevin Cernekee, linux-mips, Saenz Julienne, Nicolas Saenz Julienne, Bjorn Helgaas, linux-arm-kernel, Rob Herring, james.quinlan, linux-rpi-kernel, linux-kernel, linux-pci On Thu, 09 Dec 2021 15:47:22 -0500, Jim Quinlan wrote: > The Broadcom STB Arm and MIPs SOCs use the same PCIe controller > HW, although the MIPs version is older. > > Signed-off-by: Jim Quinlan <jim2101024@gmail.com> > --- > Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml | 2 ++ > 1 file changed, 2 insertions(+) > Acked-by: Rob Herring <robh@kernel.org> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH v1 4/4] PCI: brcmstb: Augment driver for MIPs SOCs 2021-12-09 20:47 [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs Jim Quinlan 2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan @ 2021-12-09 20:47 ` Jim Quinlan 2021-12-09 21:32 ` Florian Fainelli 2022-07-06 21:42 ` Bjorn Helgaas 2022-01-05 10:42 ` [PATCH v1 0/4] " Thomas Bogendoerfer 2022-01-11 15:18 ` Thomas Bogendoerfer 3 siblings, 2 replies; 11+ messages in thread From: Jim Quinlan @ 2021-12-09 20:47 UTC (permalink / raw) To: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, jim2101024, james.quinlan Cc: Lorenzo Pieralisi, Rob Herring, Krzysztof Wilczyński, Florian Fainelli, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE The current brcmstb driver works for Arm and Arm64. A few things are modified here for us to support MIPs as well. o There are four outbound range register groups and each directs a window of up to 128MB. Even though there are four 128MB DT "ranges" in the bmips PCIe DT node, these ranges are contiguous and are collapsed into a single range by the OF range parser. Now the driver assumes a single range -- for MIPs only -- and splits it back into 128MB sizes. o For bcm7425, the config space accesses must be 32-bit reads or writes. In addition, the 4k config space register array is missing and not used. o The registers for the upper 32-bits of the outbound window address do not exist. o Burst size must be set to 256 (this refers to an internal bus). Signed-off-by: Jim Quinlan <jim2101024@gmail.com> --- drivers/pci/controller/Kconfig | 2 +- drivers/pci/controller/pcie-brcmstb.c | 82 +++++++++++++++++++++++++-- 2 files changed, 79 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig index 93b141110537..4ac474d4a956 100644 --- a/drivers/pci/controller/Kconfig +++ b/drivers/pci/controller/Kconfig @@ -274,7 +274,7 @@ config PCIE_BRCMSTB BMIPS_GENERIC || COMPILE_TEST depends on OF depends on PCI_MSI_IRQ_DOMAIN - default ARCH_BRCMSTB + default ARCH_BRCMSTB || BMIPS_GENERIC help Say Y here to enable PCIe host controller support for Broadcom STB based SoCs, like the Raspberry Pi 4. diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 1fc7bd49a7ad..a267cd5b3233 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -118,6 +118,7 @@ #define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204 #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2 #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000 +#define PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x00800000 #define PCIE_INTR2_CPU_BASE 0x4300 @@ -205,6 +206,8 @@ enum { enum pcie_type { GENERIC, + BCM7425, + BCM7435, BCM4908, BCM7278, BCM2711, @@ -223,6 +226,12 @@ static const int pcie_offsets[] = { [EXT_CFG_DATA] = 0x9004, }; +static const int pcie_offsets_bmips_7425[] = { + [RGR1_SW_INIT_1] = 0x8010, + [EXT_CFG_INDEX] = 0x8300, + [EXT_CFG_DATA] = 0x8304, +}; + static const struct pcie_cfg_data generic_cfg = { .offsets = pcie_offsets, .type = GENERIC, @@ -230,6 +239,20 @@ static const struct pcie_cfg_data generic_cfg = { .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, }; +static const struct pcie_cfg_data bcm7425_cfg = { + .offsets = pcie_offsets_bmips_7425, + .type = BCM7425, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + +static const struct pcie_cfg_data bcm7435_cfg = { + .offsets = pcie_offsets, + .type = BCM7435, + .perst_set = brcm_pcie_perst_set_generic, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, +}; + static const struct pcie_cfg_data bcm4908_cfg = { .offsets = pcie_offsets, .type = BCM4908, @@ -297,6 +320,11 @@ struct brcm_pcie { void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); }; +static inline bool is_bmips(const struct brcm_pcie *pcie) +{ + return pcie->type == BCM7435 || pcie->type == BCM7425; +} + /* * This is to convert the size of the inbound "BAR" region to the * non-linear values of PCIE_X_MISC_RC_BAR[123]_CONFIG_LO.SIZE @@ -443,6 +471,9 @@ static void brcm_pcie_set_outbound_win(struct brcm_pcie *pcie, PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_LIMIT_MASK); writel(tmp, pcie->base + PCIE_MEM_WIN0_BASE_LIMIT(win)); + if (is_bmips(pcie)) + return; + /* Write the cpu & limit addr upper bits */ high_addr_shift = HWEIGHT32(PCIE_MISC_CPU_2_PCIE_MEM_WIN0_BASE_LIMIT_BASE_MASK); @@ -718,12 +749,35 @@ static void __iomem *brcm_pcie_map_conf(struct pci_bus *bus, unsigned int devfn, return base + PCIE_EXT_CFG_DATA + where; } +static void __iomem *brcm_pcie_map_conf32(struct pci_bus *bus, unsigned int devfn, + int where) +{ + struct brcm_pcie *pcie = bus->sysdata; + void __iomem *base = pcie->base; + int idx; + + /* Accesses to the RC go right to the RC registers if slot==0 */ + if (pci_is_root_bus(bus)) + return PCI_SLOT(devfn) ? NULL : base + (where & ~0x3); + + /* For devices, write to the config space index register */ + idx = PCIE_ECAM_OFFSET(bus->number, devfn, (where & ~3)); + writel(idx, base + IDX_ADDR(pcie)); + return base + DATA_ADDR(pcie); +} + static struct pci_ops brcm_pcie_ops = { .map_bus = brcm_pcie_map_conf, .read = pci_generic_config_read, .write = pci_generic_config_write, }; +static struct pci_ops brcm_pcie_ops32 = { + .map_bus = brcm_pcie_map_conf32, + .read = pci_generic_config_read32, + .write = pci_generic_config_write32, +}; + static inline void brcm_pcie_bridge_sw_init_set_generic(struct brcm_pcie *pcie, u32 val) { u32 tmp, mask = RGR1_SW_INIT_1_INIT_GENERIC_MASK; @@ -883,7 +937,10 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) pcie->bridge_sw_init_set(pcie, 0); tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); - tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; + if (is_bmips(pcie)) + tmp &= ~PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; + else + tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); /* Wait for SerDes to be stable */ usleep_range(100, 200); @@ -893,8 +950,10 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) * is encoded as 0=128, 1=256, 2=512, 3=Rsvd, for BCM7278 it * is encoded as 0=Rsvd, 1=128, 2=256, 3=512. */ - if (pcie->type == BCM2711) - burst = 0x0; /* 128B */ + if (is_bmips(pcie)) + burst = 0x1; /* 256 bytes */ + else if (pcie->type == BCM2711) + burst = 0x0; /* 128 bytes */ else if (pcie->type == BCM7278) burst = 0x3; /* 512 bytes */ else @@ -988,6 +1047,19 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) return -EINVAL; } + if (is_bmips(pcie)) { + u64 start = res->start; + unsigned int j, nwins = resource_size(res) / SZ_128M; + + /* bmips PCIe outbound windows have a 128MB max size */ + if (nwins > BRCM_NUM_PCIE_OUT_WINS) + nwins = BRCM_NUM_PCIE_OUT_WINS; + for (j = 0; j < nwins; j++, start += SZ_128M) + brcm_pcie_set_outbound_win(pcie, j, start, + start - entry->offset, + SZ_128M); + break; + } brcm_pcie_set_outbound_win(pcie, num_out_wins, res->start, res->start - entry->offset, resource_size(res)); @@ -1226,6 +1298,8 @@ static const struct of_device_id brcm_pcie_match[] = { { .compatible = "brcm,bcm7278-pcie", .data = &bcm7278_cfg }, { .compatible = "brcm,bcm7216-pcie", .data = &bcm7278_cfg }, { .compatible = "brcm,bcm7445-pcie", .data = &generic_cfg }, + { .compatible = "brcm,bcm7435-pcie", .data = &bcm7435_cfg }, + { .compatible = "brcm,bcm7425-pcie", .data = &bcm7425_cfg }, {}, }; @@ -1315,7 +1389,7 @@ static int brcm_pcie_probe(struct platform_device *pdev) } } - bridge->ops = &brcm_pcie_ops; + bridge->ops = pcie->type == BCM7425 ? &brcm_pcie_ops32 : &brcm_pcie_ops; bridge->sysdata = pcie; platform_set_drvdata(pdev, pcie); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH v1 4/4] PCI: brcmstb: Augment driver for MIPs SOCs 2021-12-09 20:47 ` [PATCH v1 4/4] PCI: brcmstb: Augment driver for " Jim Quinlan @ 2021-12-09 21:32 ` Florian Fainelli 2022-07-06 21:42 ` Bjorn Helgaas 1 sibling, 0 replies; 11+ messages in thread From: Florian Fainelli @ 2021-12-09 21:32 UTC (permalink / raw) To: Jim Quinlan, linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, james.quinlan Cc: Lorenzo Pieralisi, Rob Herring, Krzysztof Wilczyński, Florian Fainelli, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE On 12/9/21 12:47 PM, Jim Quinlan wrote: > The current brcmstb driver works for Arm and Arm64. A few things are > modified here for us to support MIPs as well. > > o There are four outbound range register groups and each directs a window > of up to 128MB. Even though there are four 128MB DT "ranges" in the > bmips PCIe DT node, these ranges are contiguous and are collapsed into > a single range by the OF range parser. Now the driver assumes a single > range -- for MIPs only -- and splits it back into 128MB sizes. > > o For bcm7425, the config space accesses must be 32-bit reads or > writes. In addition, the 4k config space register array is missing > and not used. > > o The registers for the upper 32-bits of the outbound window address do > not exist. > > o Burst size must be set to 256 (this refers to an internal bus). > > Signed-off-by: Jim Quinlan <jim2101024@gmail.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 4/4] PCI: brcmstb: Augment driver for MIPs SOCs 2021-12-09 20:47 ` [PATCH v1 4/4] PCI: brcmstb: Augment driver for " Jim Quinlan 2021-12-09 21:32 ` Florian Fainelli @ 2022-07-06 21:42 ` Bjorn Helgaas 2022-07-08 13:37 ` Jim Quinlan 1 sibling, 1 reply; 11+ messages in thread From: Bjorn Helgaas @ 2022-07-06 21:42 UTC (permalink / raw) To: Jim Quinlan Cc: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, james.quinlan, Lorenzo Pieralisi, Rob Herring, Krzysztof Wilczyński, Florian Fainelli, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE On Thu, Dec 09, 2021 at 03:47:25PM -0500, Jim Quinlan wrote: > The current brcmstb driver works for Arm and Arm64. A few things are > modified here for us to support MIPs as well. > > o There are four outbound range register groups and each directs a window > of up to 128MB. Even though there are four 128MB DT "ranges" in the > bmips PCIe DT node, these ranges are contiguous and are collapsed into > a single range by the OF range parser. Now the driver assumes a single > range -- for MIPs only -- and splits it back into 128MB sizes. > > o For bcm7425, the config space accesses must be 32-bit reads or > writes. In addition, the 4k config space register array is missing > and not used. > > o The registers for the upper 32-bits of the outbound window address do > not exist. > > o Burst size must be set to 256 (this refers to an internal bus). > ... > @@ -118,6 +118,7 @@ > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204 > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2 > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000 > +#define PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x00800000 > @@ -883,7 +937,10 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) > pcie->bridge_sw_init_set(pcie, 0); > > tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > - tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > + if (is_bmips(pcie)) > + tmp &= ~PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > + else > + tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > /* Wait for SerDes to be stable */ > usleep_range(100, 200); brcm_pcie_resume() has similar code that updates PCIE_MISC_HARD_PCIE_HARD_DEBUG [1]: tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); u32p_replace_bits(&tmp, 0, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK); writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); /* wait for serdes to be stable */ udelay(100); This patch didn't change brcm_pcie_resume() to check is_bmips(). Should it? If so, it would be nice to use the same method for updating the value (either u32p_replace_bits or plain C bitops) in both places. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/pcie-brcmstb.c?id=v5.18#n1452 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 4/4] PCI: brcmstb: Augment driver for MIPs SOCs 2022-07-06 21:42 ` Bjorn Helgaas @ 2022-07-08 13:37 ` Jim Quinlan 0 siblings, 0 replies; 11+ messages in thread From: Jim Quinlan @ 2022-07-08 13:37 UTC (permalink / raw) To: Bjorn Helgaas Cc: Jim Quinlan, open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, Lorenzo Pieralisi, Rob Herring, Krzysztof Wilczyński, Florian Fainelli, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE [-- Attachment #1.1: Type: text/plain, Size: 2743 bytes --] On Wed, Jul 6, 2022 at 5:42 PM Bjorn Helgaas <helgaas@kernel.org> wrote: > > On Thu, Dec 09, 2021 at 03:47:25PM -0500, Jim Quinlan wrote: > > The current brcmstb driver works for Arm and Arm64. A few things are > > modified here for us to support MIPs as well. > > > > o There are four outbound range register groups and each directs a window > > of up to 128MB. Even though there are four 128MB DT "ranges" in the > > bmips PCIe DT node, these ranges are contiguous and are collapsed into > > a single range by the OF range parser. Now the driver assumes a single > > range -- for MIPs only -- and splits it back into 128MB sizes. > > > > o For bcm7425, the config space accesses must be 32-bit reads or > > writes. In addition, the 4k config space register array is missing > > and not used. > > > > o The registers for the upper 32-bits of the outbound window address do > > not exist. > > > > o Burst size must be set to 256 (this refers to an internal bus). > > ... > > > @@ -118,6 +118,7 @@ > > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204 > > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2 > > #define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000 > > +#define PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x00800000 > > > @@ -883,7 +937,10 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) > > pcie->bridge_sw_init_set(pcie, 0); > > > > tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > > - tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > > + if (is_bmips(pcie)) > > + tmp &= ~PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > > + else > > + tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK; > > writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > > /* Wait for SerDes to be stable */ > > usleep_range(100, 200); > > brcm_pcie_resume() has similar code that updates > PCIE_MISC_HARD_PCIE_HARD_DEBUG [1]: > > tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > u32p_replace_bits(&tmp, 0, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK); > writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG); > > /* wait for serdes to be stable */ > udelay(100); > > This patch didn't change brcm_pcie_resume() to check is_bmips(). > Should it? > > If so, it would be nice to use the same method for updating the value > (either u32p_replace_bits or plain C bitops) in both places. Will send a patch to fix this, thanks. Jim Quinlan Broadcom STB > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/pci/controller/pcie-brcmstb.c?id=v5.18#n1452 [-- Attachment #1.2: S/MIME Cryptographic Signature --] [-- Type: application/pkcs7-signature, Size: 4210 bytes --] [-- Attachment #2: Type: text/plain, Size: 176 bytes --] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs 2021-12-09 20:47 [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs Jim Quinlan 2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan 2021-12-09 20:47 ` [PATCH v1 4/4] PCI: brcmstb: Augment driver for " Jim Quinlan @ 2022-01-05 10:42 ` Thomas Bogendoerfer 2022-01-07 22:36 ` Jim Quinlan 2022-01-11 15:18 ` Thomas Bogendoerfer 3 siblings, 1 reply; 11+ messages in thread From: Thomas Bogendoerfer @ 2022-01-05 10:42 UTC (permalink / raw) To: Jim Quinlan Cc: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, james.quinlan, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Krzysztof Wilczyński, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, Rob Herring, Saenz Julienne On Thu, Dec 09, 2021 at 03:47:21PM -0500, Jim Quinlan wrote: > With this patchset, the Broadcom STB PCIe controller driver > supports Arm, Arm64, and now MIPs. > > Jim Quinlan (4): > dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs > MIPS: bmips: Add support PCIe controller device nodes > MIPS: bmips: Remove obsolete DMA mapping support > PCI: brcmstb: Augment driver for MIPs SOCs > > .../bindings/pci/brcm,stb-pcie.yaml | 2 + > arch/mips/Kconfig | 1 - > arch/mips/bmips/dma.c | 106 +----------------- > arch/mips/boot/dts/brcm/bcm7425.dtsi | 30 +++++ > arch/mips/boot/dts/brcm/bcm7435.dtsi | 30 +++++ > arch/mips/boot/dts/brcm/bcm97425svmb.dts | 9 ++ > arch/mips/boot/dts/brcm/bcm97435svmb.dts | 9 ++ > drivers/pci/controller/Kconfig | 2 +- > drivers/pci/controller/pcie-brcmstb.c | 82 +++++++++++++- > 9 files changed, 161 insertions(+), 110 deletions(-) if nobody objects I'd like to add this series to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs 2022-01-05 10:42 ` [PATCH v1 0/4] " Thomas Bogendoerfer @ 2022-01-07 22:36 ` Jim Quinlan 0 siblings, 0 replies; 11+ messages in thread From: Jim Quinlan @ 2022-01-07 22:36 UTC (permalink / raw) To: Thomas Bogendoerfer Cc: Jim Quinlan, open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Krzysztof Wilczyński, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, Rob Herring, Saenz Julienne On Wed, Jan 5, 2022 at 5:42 AM Thomas Bogendoerfer <tsbogend@alpha.franken.de> wrote: > > On Thu, Dec 09, 2021 at 03:47:21PM -0500, Jim Quinlan wrote: > > With this patchset, the Broadcom STB PCIe controller driver > > supports Arm, Arm64, and now MIPs. > > > > Jim Quinlan (4): > > dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs > > MIPS: bmips: Add support PCIe controller device nodes > > MIPS: bmips: Remove obsolete DMA mapping support > > PCI: brcmstb: Augment driver for MIPs SOCs > > > > .../bindings/pci/brcm,stb-pcie.yaml | 2 + > > arch/mips/Kconfig | 1 - > > arch/mips/bmips/dma.c | 106 +----------------- > > arch/mips/boot/dts/brcm/bcm7425.dtsi | 30 +++++ > > arch/mips/boot/dts/brcm/bcm7435.dtsi | 30 +++++ > > arch/mips/boot/dts/brcm/bcm97425svmb.dts | 9 ++ > > arch/mips/boot/dts/brcm/bcm97435svmb.dts | 9 ++ > > drivers/pci/controller/Kconfig | 2 +- > > drivers/pci/controller/pcie-brcmstb.c | 82 +++++++++++++- > > 9 files changed, 161 insertions(+), 110 deletions(-) > > if nobody objects I'd like to add this series to mips-next. Hi Thomas, I have another pullreq in progress [1] that may possibly be accepted soon. I have tested that these two pullreqs do not conflict or cause compiler errors regardless of their merge order. Regards, Jim Quinlan Broadcom STB [1] [PATCH v10 0/7] PCI: brcmstb: root port turns on sub-device power [PATCH v10 0/7] PCI: brcmstb: root port turns on sub-device power > > Thomas. > > -- > Crap can work. Given enough thrust pigs will fly, but it's not necessarily a > good idea. [ RFC1925, 2.3 ] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs 2021-12-09 20:47 [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs Jim Quinlan ` (2 preceding siblings ...) 2022-01-05 10:42 ` [PATCH v1 0/4] " Thomas Bogendoerfer @ 2022-01-11 15:18 ` Thomas Bogendoerfer 3 siblings, 0 replies; 11+ messages in thread From: Thomas Bogendoerfer @ 2022-01-11 15:18 UTC (permalink / raw) To: Jim Quinlan Cc: linux-pci, linux-mips, Nicolas Saenz Julienne, Bjorn Helgaas, Kevin Cernekee, bcm-kernel-feedback-list, james.quinlan, open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS, Krzysztof Wilczyński, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, open list, moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE, Rob Herring, Saenz Julienne On Thu, Dec 09, 2021 at 03:47:21PM -0500, Jim Quinlan wrote: > With this patchset, the Broadcom STB PCIe controller driver > supports Arm, Arm64, and now MIPs. > > Jim Quinlan (4): > dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 MIPs SOCs > MIPS: bmips: Add support PCIe controller device nodes > MIPS: bmips: Remove obsolete DMA mapping support > PCI: brcmstb: Augment driver for MIPs SOCs > > .../bindings/pci/brcm,stb-pcie.yaml | 2 + > arch/mips/Kconfig | 1 - > arch/mips/bmips/dma.c | 106 +----------------- > arch/mips/boot/dts/brcm/bcm7425.dtsi | 30 +++++ > arch/mips/boot/dts/brcm/bcm7435.dtsi | 30 +++++ > arch/mips/boot/dts/brcm/bcm97425svmb.dts | 9 ++ > arch/mips/boot/dts/brcm/bcm97435svmb.dts | 9 ++ > drivers/pci/controller/Kconfig | 2 +- > drivers/pci/controller/pcie-brcmstb.c | 82 +++++++++++++- > 9 files changed, 161 insertions(+), 110 deletions(-) series applied to mips-next. Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ] _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2022-07-08 13:38 UTC | newest] Thread overview: 11+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2021-12-09 20:47 [PATCH v1 0/4] PCI: brcmstb: Augment driver for MIPs SOCs Jim Quinlan 2021-12-09 20:47 ` [PATCH v1 1/4] dt-bindings: PCI: Add compatible string for Brcmstb 74[23]5 " Jim Quinlan 2021-12-09 21:29 ` Florian Fainelli 2021-12-15 19:50 ` Rob Herring 2021-12-09 20:47 ` [PATCH v1 4/4] PCI: brcmstb: Augment driver for " Jim Quinlan 2021-12-09 21:32 ` Florian Fainelli 2022-07-06 21:42 ` Bjorn Helgaas 2022-07-08 13:37 ` Jim Quinlan 2022-01-05 10:42 ` [PATCH v1 0/4] " Thomas Bogendoerfer 2022-01-07 22:36 ` Jim Quinlan 2022-01-11 15:18 ` Thomas Bogendoerfer
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