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PCI: dwc: designware: Move _unroll configurations to a separate function 

No functional change. Rename dw_pcie_writel_unroll/dw_pcie_readl_unroll to
dw_pcie_writel_ob_unroll/dw_pcie_readl_ob_unroll respectively as these
functions are used to perform only outbound configurations. Also move
these _unroll configurations to a separate function.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.1
Kishon Vijay Abraham I 2017-03-13 19:13:27 +05:30 committed by Bjorn Helgaas
parent a509d7d9af
commit edd45e3968
1 changed files with 58 additions and 39 deletions
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97
drivers/pci/dwc/pcie-designware.c
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@ -92,21 +92,56 @@ void __dw_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg,
dev_err(pci->dev, "write DBI address failed\n");
}
static u32 dw_pcie_readl_unroll(struct dw_pcie *pci, u32 index, u32 reg)
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);
return dw_pcie_readl_dbi(pci, offset + reg);
}
static void dw_pcie_writel_unroll(struct dw_pcie *pci, u32 index, u32 reg,
u32 val)
static void dw_pcie_writel_ob_unroll(struct dw_pcie *pci, u32 index, u32 reg,
u32 val)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
dw_pcie_writel_dbi(pci, offset + reg, val);
}
void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, int index, int type,
u64 cpu_addr, u64 pci_addr, u32 size)
{
u32 retries, val;
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_BASE,
lower_32_bits(cpu_addr));
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_BASE,
upper_32_bits(cpu_addr));
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LIMIT,
lower_32_bits(cpu_addr + size - 1));
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET,
lower_32_bits(pci_addr));
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,
upper_32_bits(pci_addr));
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
type);
dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
PCIE_ATU_ENABLE);
/*
* Make sure ATU enable takes effect before any subsequent config
* and I/O accesses.
*/
for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
val = dw_pcie_readl_ob_unroll(pci, index,
PCIE_ATU_UNR_REGION_CTRL2);
if (val & PCIE_ATU_ENABLE)
return;
usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
}
dev_err(pci->dev, "outbound iATU is not being enabled\n");
}
void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
u64 cpu_addr, u64 pci_addr, u32 size)
{
@ -116,54 +151,38 @@ void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type,
cpu_addr = pci->ops->cpu_addr_fixup(cpu_addr);
if (pci->iatu_unroll_enabled) {
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LOWER_BASE,
lower_32_bits(cpu_addr));
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_UPPER_BASE,
upper_32_bits(cpu_addr));
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LIMIT,
lower_32_bits(cpu_addr + size - 1));
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_LOWER_TARGET,
lower_32_bits(pci_addr));
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_UPPER_TARGET,
upper_32_bits(pci_addr));
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1,
type);
dw_pcie_writel_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2,
PCIE_ATU_ENABLE);
} else {
dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT,
PCIE_ATU_REGION_OUTBOUND | index);
dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_BASE,
lower_32_bits(cpu_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_BASE,
upper_32_bits(cpu_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT,
lower_32_bits(cpu_addr + size - 1));
dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET,
lower_32_bits(pci_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET,
upper_32_bits(pci_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type);
dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
dw_pcie_prog_outbound_atu_unroll(pci, index, type, cpu_addr,
pci_addr, size);
return;
}
dw_pcie_writel_dbi(pci, PCIE_ATU_VIEWPORT,
PCIE_ATU_REGION_OUTBOUND | index);
dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_BASE,
lower_32_bits(cpu_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_BASE,
upper_32_bits(cpu_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT,
lower_32_bits(cpu_addr + size - 1));
dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET,
lower_32_bits(pci_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_TARGET,
upper_32_bits(pci_addr));
dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, type);
dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
/*
* Make sure ATU enable takes effect before any subsequent config
* and I/O accesses.
*/
for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
if (pci->iatu_unroll_enabled)
val = dw_pcie_readl_unroll(pci, index,
PCIE_ATU_UNR_REGION_CTRL2);
else
val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2);
val = dw_pcie_readl_dbi(pci, PCIE_ATU_CR2);
if (val == PCIE_ATU_ENABLE)
return;
usleep_range(LINK_WAIT_IATU_MIN, LINK_WAIT_IATU_MAX);
}
dev_err(pci->dev, "iATU is not being enabled\n");
dev_err(pci->dev, "outbound iATU is not being enabled\n");
}
int dw_pcie_wait_for_link(struct dw_pcie *pci)