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author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2022-06-24 17:39:43 +0300 |
---|---|---|
committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-08-01 23:15:09 +0300 |
commit | 5a163f5998185d3af58d825501765b08fd6ed32e (patch) | |
tree | 2b9805e71cb618660f0453ec7134d2849594d75a /drivers/pci/controller/dwc/pcie-designware.h | |
parent | 38fe272389f44c223c689d74d9e2365257ed85e1 (diff) | |
download | linux-5a163f5998185d3af58d825501765b08fd6ed32e.tar.xz |
PCI: dwc: Simplify in/outbound iATU setup methods
Previously __dw_pcie_prog_outbound_atu() duplicated a lot of code between
the iatu_unroll_enabled version and the PCIE_ATU_VIEWPORT version:
__dw_pcie_prog_outbound_atu
if (iatu_unroll_enabled)
dw_pcie_prog_outbound_atu_unroll
dw_pcie_writel_ob_unroll(PCIE_ATU_UNR_LOWER_BASE, ...)
dw_pcie_writel_ob_unroll(PCIE_ATU_UNR_UPPER_BASE, ...)
...
return
dw_pcie_writel_dbi(PCIE_ATU_VIEWPORT, ...)
dw_pcie_writel_dbi(PCIE_ATU_LOWER_BASE, ...)
dw_pcie_writel_dbi(PCIE_ATU_UPPER_BASE, ...)
...
Unify those by pushing the unroll address computation and viewport
selection down into dw_pcie_writel_atu() so we can use the same
dw_pcie_writel_atu_ob() accessor for both paths:
__dw_pcie_prog_outbound_atu
dw_pcie_writel_atu_ob(PCIE_ATU_LOWER_BASE, ...)
dw_pcie_writel_atu
dw_pcie_select_atu # new
if (iatu_unroll_enabled)
return pci->atu_base + PCIE_ATU_UNROLL_BASE(...)
dw_pcie_writel_dbi(PCIE_ATU_VIEWPORT, ...)
return pci->atu_base
dw_pcie_write(base + reg)
dw_pcie_writel_atu_ob(PCIE_ATU_UPPER_BASE, ...)
...
In the non-unroll case, this does involve more MMIO writes to
PCIE_ATU_VIEWPORT, but it's mainly in initialization paths and the code
simplification is significant.
[bhelgaas: commit log, simplify dw_pcie_select_atu()]
Link: https://lore.kernel.org/r/20220624143947.8991-12-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-designware.h')
-rw-r--r-- | drivers/pci/controller/dwc/pcie-designware.h | 48 |
1 files changed, 19 insertions, 29 deletions
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 72d185ff72f3..c18f0db09b31 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -103,10 +103,21 @@ #define PCIE_VERSION_NUMBER 0x8F8 #define PCIE_VERSION_TYPE 0x8FC +/* + * iATU inbound and outbound windows CSRs. Before the IP-core v4.80a each + * iATU region CSRs had been indirectly accessible by means of the dedicated + * viewport selector. The iATU/eDMA CSRs space was re-designed in DWC PCIe + * v4.80a in a way so the viewport was unrolled into the directly accessible + * iATU/eDMA CSRs space. + */ #define PCIE_ATU_VIEWPORT 0x900 #define PCIE_ATU_REGION_DIR_IB BIT(31) #define PCIE_ATU_REGION_DIR_OB 0 -#define PCIE_ATU_CR1 0x904 +#define PCIE_ATU_VIEWPORT_BASE 0x904 +#define PCIE_ATU_UNROLL_BASE(dir, index) \ + (((index) << 9) | ((dir == PCIE_ATU_REGION_DIR_IB) ? BIT(8) : 0)) +#define PCIE_ATU_VIEWPORT_SIZE 0x2C +#define PCIE_ATU_REGION_CTRL1 0x000 #define PCIE_ATU_INCREASE_REGION_SIZE BIT(13) #define PCIE_ATU_TYPE_MEM 0x0 #define PCIE_ATU_TYPE_IO 0x2 @@ -114,19 +125,19 @@ #define PCIE_ATU_TYPE_CFG1 0x5 #define PCIE_ATU_TD BIT(8) #define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20) -#define PCIE_ATU_CR2 0x908 +#define PCIE_ATU_REGION_CTRL2 0x004 #define PCIE_ATU_ENABLE BIT(31) #define PCIE_ATU_BAR_MODE_ENABLE BIT(30) #define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19) -#define PCIE_ATU_LOWER_BASE 0x90C -#define PCIE_ATU_UPPER_BASE 0x910 -#define PCIE_ATU_LIMIT 0x914 -#define PCIE_ATU_LOWER_TARGET 0x918 +#define PCIE_ATU_LOWER_BASE 0x008 +#define PCIE_ATU_UPPER_BASE 0x00C +#define PCIE_ATU_LIMIT 0x010 +#define PCIE_ATU_LOWER_TARGET 0x014 #define PCIE_ATU_BUS(x) FIELD_PREP(GENMASK(31, 24), x) #define PCIE_ATU_DEV(x) FIELD_PREP(GENMASK(23, 19), x) #define PCIE_ATU_FUNC(x) FIELD_PREP(GENMASK(18, 16), x) -#define PCIE_ATU_UPPER_TARGET 0x91C -#define PCIE_ATU_UPPER_LIMIT 0x924 +#define PCIE_ATU_UPPER_TARGET 0x018 +#define PCIE_ATU_UPPER_LIMIT 0x020 #define PCIE_MISC_CONTROL_1_OFF 0x8BC #define PCIE_DBI_RO_WR_EN BIT(0) @@ -144,19 +155,6 @@ #define PCIE_PL_CHK_REG_ERR_ADDR 0xB28 /* - * iATU Unroll-specific register definitions - * From 4.80 core version the address translation will be made by unroll - */ -#define PCIE_ATU_UNR_REGION_CTRL1 0x00 -#define PCIE_ATU_UNR_REGION_CTRL2 0x04 -#define PCIE_ATU_UNR_LOWER_BASE 0x08 -#define PCIE_ATU_UNR_UPPER_BASE 0x0C -#define PCIE_ATU_UNR_LOWER_LIMIT 0x10 -#define PCIE_ATU_UNR_LOWER_TARGET 0x14 -#define PCIE_ATU_UNR_UPPER_TARGET 0x18 -#define PCIE_ATU_UNR_UPPER_LIMIT 0x20 - -/* * The default address offset between dbi_base and atu_base. Root controller * drivers are not required to initialize atu_base if the offset matches this * default; the driver core automatically derives atu_base from dbi_base using @@ -164,13 +162,6 @@ */ #define DEFAULT_DBI_ATU_OFFSET (0x3 << 20) -/* Register address builder */ -#define PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(region) \ - ((region) << 9) - -#define PCIE_GET_ATU_INB_UNR_REG_OFFSET(region) \ - (((region) << 9) | BIT(8)) - #define MAX_MSI_IRQS 256 #define MAX_MSI_IRQS_PER_CTRL 32 #define MAX_MSI_CTRLS (MAX_MSI_IRQS / MAX_MSI_IRQS_PER_CTRL) @@ -277,7 +268,6 @@ struct dw_pcie { struct device *dev; void __iomem *dbi_base; void __iomem *dbi_base2; - /* Used when iatu_unroll_enabled is true */ void __iomem *atu_base; size_t atu_size; u32 num_ib_windows; |