From a9f4c2d2f99ec85ebc734a5bfb21a2cf93c169ad Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Mon, 25 Mar 2019 15:09:31 +0530 Subject: PCI: dwc: Enable iATU unroll for endpoint too iatu_unroll_enabled flag is set only for Designware in host mode. However iATU unroll can be applicable for endpoint mode too. Set iatu_unroll_enabled flag in dw_pcie_setup() which is common for both host mode and endpoint mode. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Lorenzo Pieralisi --- drivers/pci/controller/dwc/pcie-designware.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers/pci/controller/dwc/pcie-designware.c') diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 31f6331ca46f..a14ca00f72aa 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -339,6 +339,17 @@ int dw_pcie_link_up(struct dw_pcie *pci) (!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING))); } +static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci) +{ + u32 val; + + val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT); + if (val == 0xffffffff) + return 1; + + return 0; +} + void dw_pcie_setup(struct dw_pcie *pci) { int ret; @@ -347,6 +358,14 @@ void dw_pcie_setup(struct dw_pcie *pci) struct device *dev = pci->dev; struct device_node *np = dev->of_node; + /* Get iATU unroll support */ + pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci); + dev_dbg(pci->dev, "iATU unroll: %s\n", + pci->iatu_unroll_enabled ? "enabled" : "disabled"); + + if (pci->iatu_unroll_enabled && !pci->atu_base) + pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; + ret = of_property_read_u32(np, "num-lanes", &lanes); if (ret) lanes = 0; -- cgit v1.2.3-59-g8ed1b From 2aadcb0cd39198833fabe1c45084f78686e71a6c Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Mon, 25 Mar 2019 15:09:32 +0530 Subject: PCI: dwc: Fix ATU identification for designware version >= 4.80 Synopsys designware version >= 4.80 uses a separate register space for programming ATU. The current code identifies if there exists a separate register space by accessing the register address of ATUs in designware version < 4.80. Accessing this address results in abort in the case of K2G. Fix it here by adding "version" member to struct dw_pcie. This should be set by platform specific drivers and designware core will use it to identify if the platform has a separate ATU space. For platforms which have not populated the version member, the old method of identification will still be used. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Lorenzo Pieralisi --- drivers/pci/controller/dwc/pcie-designware.c | 14 ++++++++------ drivers/pci/controller/dwc/pcie-designware.h | 1 + 2 files changed, 9 insertions(+), 6 deletions(-) (limited to 'drivers/pci/controller/dwc/pcie-designware.c') diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index a14ca00f72aa..4e2f7946da89 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -358,13 +358,15 @@ void dw_pcie_setup(struct dw_pcie *pci) struct device *dev = pci->dev; struct device_node *np = dev->of_node; - /* Get iATU unroll support */ - pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci); - dev_dbg(pci->dev, "iATU unroll: %s\n", - pci->iatu_unroll_enabled ? "enabled" : "disabled"); + if (pci->version >= 0x480A || (!pci->version && + dw_pcie_iatu_unroll_enabled(pci))) { + pci->iatu_unroll_enabled = true; + if (!pci->atu_base) + pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; + } + dev_dbg(pci->dev, "iATU unroll: %s\n", pci->iatu_unroll_enabled ? + "enabled" : "disabled"); - if (pci->iatu_unroll_enabled && !pci->atu_base) - pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET; ret = of_property_read_u32(np, "num-lanes", &lanes); if (ret) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index ca3a3190a6f5..90a5b1215344 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -234,6 +234,7 @@ struct dw_pcie { struct pcie_port pp; struct dw_pcie_ep ep; const struct dw_pcie_ops *ops; + unsigned int version; }; #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp) -- cgit v1.2.3-59-g8ed1b From ddf567e3d9949aeb7992fb48a8663c81a15e7d81 Mon Sep 17 00:00:00 2001 From: Kishon Vijay Abraham I Date: Mon, 25 Mar 2019 15:09:42 +0530 Subject: PCI: dwc: Add callbacks for accessing dbi2 address space Certain platforms like TI's AM654 do not have aseparate address space for dbi2 instead they are accessed using the same address space as dbi with some configuration bit set. In order to support such platforms, add callbacks for accessing dbi2 address space. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Lorenzo Pieralisi --- drivers/pci/controller/dwc/pcie-designware.c | 31 ++++++++++++++++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 12 +++++++++-- 2 files changed, 41 insertions(+), 2 deletions(-) (limited to 'drivers/pci/controller/dwc/pcie-designware.c') diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 4e2f7946da89..d7cc1a0c1de6 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -89,6 +89,37 @@ void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, dev_err(pci->dev, "Write DBI address failed\n"); } +u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg, + size_t size) +{ + int ret; + u32 val; + + if (pci->ops->read_dbi2) + return pci->ops->read_dbi2(pci, base, reg, size); + + ret = dw_pcie_read(base + reg, size, &val); + if (ret) + dev_err(pci->dev, "read DBI address failed\n"); + + return val; +} + +void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg, + size_t size, u32 val) +{ + int ret; + + if (pci->ops->write_dbi2) { + pci->ops->write_dbi2(pci, base, reg, size, val); + return; + } + + ret = dw_pcie_write(base + reg, size, val); + if (ret) + dev_err(pci->dev, "write DBI address failed\n"); +} + static u32 dw_pcie_readl_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg) { u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index e36941ff7cf6..7abca9eb00bf 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -218,6 +218,10 @@ struct dw_pcie_ops { size_t size); void (*write_dbi)(struct dw_pcie *pcie, void __iomem *base, u32 reg, size_t size, u32 val); + u32 (*read_dbi2)(struct dw_pcie *pcie, void __iomem *base, u32 reg, + size_t size); + void (*write_dbi2)(struct dw_pcie *pcie, void __iomem *base, u32 reg, + size_t size, u32 val); int (*link_up)(struct dw_pcie *pcie); int (*start_link)(struct dw_pcie *pcie); void (*stop_link)(struct dw_pcie *pcie); @@ -249,6 +253,10 @@ u32 __dw_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, size_t size); void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, size_t size, u32 val); +u32 __dw_pcie_read_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg, + size_t size); +void __dw_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg, + size_t size, u32 val); int dw_pcie_link_up(struct dw_pcie *pci); int dw_pcie_wait_for_link(struct dw_pcie *pci); void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, @@ -292,12 +300,12 @@ static inline u8 dw_pcie_readb_dbi(struct dw_pcie *pci, u32 reg) static inline void dw_pcie_writel_dbi2(struct dw_pcie *pci, u32 reg, u32 val) { - __dw_pcie_write_dbi(pci, pci->dbi_base2, reg, 0x4, val); + __dw_pcie_write_dbi2(pci, pci->dbi_base2, reg, 0x4, val); } static inline u32 dw_pcie_readl_dbi2(struct dw_pcie *pci, u32 reg) { - return __dw_pcie_read_dbi(pci, pci->dbi_base2, reg, 0x4); + return __dw_pcie_read_dbi2(pci, pci->dbi_base2, reg, 0x4); } static inline void dw_pcie_writel_atu(struct dw_pcie *pci, u32 reg, u32 val) -- cgit v1.2.3-59-g8ed1b