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authorKishon Vijay Abraham I <kishon@ti.com>2017-02-15 18:48:14 +0530
committerBjorn Helgaas <bhelgaas@google.com>2017-02-21 15:00:26 -0600
commit442ec4c04d1235f8c664a74004dae54a7a574d18 (patch)
tree66e1b54e8cabd635a378b48307175dac998fa47b /drivers/pci/dwc/pcie-designware.c
parent40f67fb2c384fe12741aa35010d62bfe8c98286c (diff)
PCI: dwc: all: Split struct pcie_port into host-only and core structures
Keep only the host-specific members in struct pcie_port and move the common members (i.e common to both host and endpoint) to struct dw_pcie. This is in preparation for adding endpoint mode support to designware driver. While at that also fix checkpatch warnings. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: Jingoo Han <jingoohan1@gmail.com> CC: Richard Zhu <hongxing.zhu@nxp.com> CC: Lucas Stach <l.stach@pengutronix.de> CC: Murali Karicheri <m-karicheri2@ti.com> CC: Minghuan Lian <minghuan.Lian@freescale.com> CC: Mingkai Hu <mingkai.hu@freescale.com> CC: Roy Zang <tie-fei.zang@freescale.com> CC: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> CC: Niklas Cassel <niklas.cassel@axis.com> CC: Jesper Nilsson <jesper.nilsson@axis.com> CC: Joao Pinto <Joao.Pinto@synopsys.com> CC: Zhou Wang <wangzhou1@hisilicon.com> CC: Gabriele Paoloni <gabriele.paoloni@huawei.com> CC: Stanimir Varbanov <svarbanov@mm-sol.com> CC: Pratyush Anand <pratyush.anand@gmail.com>
Diffstat (limited to 'drivers/pci/dwc/pcie-designware.c')
-rw-r--r--drivers/pci/dwc/pcie-designware.c203
1 files changed, 108 insertions, 95 deletions
diff --git a/drivers/pci/dwc/pcie-designware.c b/drivers/pci/dwc/pcie-designware.c
index 6e95291d9cb4..be610391ff48 100644
--- a/drivers/pci/dwc/pcie-designware.c
+++ b/drivers/pci/dwc/pcie-designware.c
@@ -71,90 +71,97 @@ int dw_pcie_write(void __iomem *addr, int size, u32 val)
return PCIBIOS_SUCCESSFUL;
}
-u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg)
+u32 dw_pcie_readl_dbi(struct dw_pcie *pci, u32 reg)
{
- if (pp->ops->readl_rc)
- return pp->ops->readl_rc(pp, reg);
+ if (pci->ops->readl_dbi)
+ return pci->ops->readl_dbi(pci, reg);
- return readl(pp->dbi_base + reg);
+ return readl(pci->dbi_base + reg);
}
-void dw_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val)
+void dw_pcie_writel_dbi(struct dw_pcie *pci, u32 reg, u32 val)
{
- if (pp->ops->writel_rc)
- pp->ops->writel_rc(pp, reg, val);
+ if (pci->ops->writel_dbi)
+ pci->ops->writel_dbi(pci, reg, val);
else
- writel(val, pp->dbi_base + reg);
+ writel(val, pci->dbi_base + reg);
}
-static u32 dw_pcie_readl_unroll(struct pcie_port *pp, u32 index, u32 reg)
+static u32 dw_pcie_readl_unroll(struct dw_pcie *pci, u32 index, u32 reg)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
- return dw_pcie_readl_rc(pp, offset + reg);
+ return dw_pcie_readl_dbi(pci, offset + reg);
}
-static void dw_pcie_writel_unroll(struct pcie_port *pp, u32 index, u32 reg,
+static void dw_pcie_writel_unroll(struct dw_pcie *pci, u32 index, u32 reg,
u32 val)
{
u32 offset = PCIE_GET_ATU_OUTB_UNR_REG_OFFSET(index);
- dw_pcie_writel_rc(pp, offset + reg, val);
+ dw_pcie_writel_dbi(pci, offset + reg, val);
}
static int dw_pcie_rd_own_conf(struct pcie_port *pp, int where, int size,
u32 *val)
{
+ struct dw_pcie *pci;
+
if (pp->ops->rd_own_conf)
return pp->ops->rd_own_conf(pp, where, size, val);
- return dw_pcie_read(pp->dbi_base + where, size, val);
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_read(pci->dbi_base + where, size, val);
}
static int dw_pcie_wr_own_conf(struct pcie_port *pp, int where, int size,
u32 val)
{
+ struct dw_pcie *pci;
+
if (pp->ops->wr_own_conf)
return pp->ops->wr_own_conf(pp, where, size, val);
- return dw_pcie_write(pp->dbi_base + where, size, val);
+ pci = to_dw_pcie_from_pp(pp);
+ return dw_pcie_write(pci->dbi_base + where, size, val);
}
-static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
- int type, u64 cpu_addr, u64 pci_addr, u32 size)
+static void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
+ int type, u64 cpu_addr, u64 pci_addr,
+ u32 size)
{
u32 retries, val;
- if (pp->iatu_unroll_enabled) {
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LOWER_BASE,
- lower_32_bits(cpu_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_UPPER_BASE,
- upper_32_bits(cpu_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LIMIT,
- lower_32_bits(cpu_addr + size - 1));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_LOWER_TARGET,
- lower_32_bits(pci_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_UPPER_TARGET,
- upper_32_bits(pci_addr));
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_REGION_CTRL1,
- type);
- dw_pcie_writel_unroll(pp, index, PCIE_ATU_UNR_REGION_CTRL2,
- PCIE_ATU_ENABLE);
+ 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_rc(pp, PCIE_ATU_VIEWPORT,
- PCIE_ATU_REGION_OUTBOUND | index);
- dw_pcie_writel_rc(pp, PCIE_ATU_LOWER_BASE,
- lower_32_bits(cpu_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_UPPER_BASE,
- upper_32_bits(cpu_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_LIMIT,
- lower_32_bits(cpu_addr + size - 1));
- dw_pcie_writel_rc(pp, PCIE_ATU_LOWER_TARGET,
- lower_32_bits(pci_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_UPPER_TARGET,
- upper_32_bits(pci_addr));
- dw_pcie_writel_rc(pp, PCIE_ATU_CR1, type);
- dw_pcie_writel_rc(pp, PCIE_ATU_CR2, PCIE_ATU_ENABLE);
+ 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);
}
/*
@@ -162,18 +169,18 @@ static void dw_pcie_prog_outbound_atu(struct pcie_port *pp, int index,
* and I/O accesses.
*/
for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) {
- if (pp->iatu_unroll_enabled)
- val = dw_pcie_readl_unroll(pp, index,
+ if (pci->iatu_unroll_enabled)
+ val = dw_pcie_readl_unroll(pci, index,
PCIE_ATU_UNR_REGION_CTRL2);
else
- val = dw_pcie_readl_rc(pp, 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(pp->dev, "iATU is not being enabled\n");
+ dev_err(pci->dev, "iATU is not being enabled\n");
}
static struct irq_chip dw_msi_irq_chip = {
@@ -390,32 +397,32 @@ static struct msi_controller dw_pcie_msi_chip = {
.teardown_irq = dw_msi_teardown_irq,
};
-int dw_pcie_wait_for_link(struct pcie_port *pp)
+int dw_pcie_wait_for_link(struct dw_pcie *pci)
{
int retries;
/* check if the link is up or not */
for (retries = 0; retries < LINK_WAIT_MAX_RETRIES; retries++) {
- if (dw_pcie_link_up(pp)) {
- dev_info(pp->dev, "link up\n");
+ if (dw_pcie_link_up(pci)) {
+ dev_info(pci->dev, "link up\n");
return 0;
}
usleep_range(LINK_WAIT_USLEEP_MIN, LINK_WAIT_USLEEP_MAX);
}
- dev_err(pp->dev, "phy link never came up\n");
+ dev_err(pci->dev, "phy link never came up\n");
return -ETIMEDOUT;
}
-int dw_pcie_link_up(struct pcie_port *pp)
+int dw_pcie_link_up(struct dw_pcie *pci)
{
u32 val;
- if (pp->ops->link_up)
- return pp->ops->link_up(pp);
+ if (pci->ops->link_up)
+ return pci->ops->link_up(pci);
- val = readl(pp->dbi_base + PCIE_PHY_DEBUG_R1);
+ val = readl(pci->dbi_base + PCIE_PHY_DEBUG_R1);
return ((val & PCIE_PHY_DEBUG_R1_LINK_UP) &&
(!(val & PCIE_PHY_DEBUG_R1_LINK_IN_TRAINING)));
}
@@ -433,11 +440,11 @@ static const struct irq_domain_ops msi_domain_ops = {
.map = dw_pcie_msi_map,
};
-static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
+static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
{
u32 val;
- val = dw_pcie_readl_rc(pp, PCIE_ATU_VIEWPORT);
+ val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
if (val == 0xffffffff)
return 1;
@@ -446,7 +453,8 @@ static u8 dw_pcie_iatu_unroll_enabled(struct pcie_port *pp)
int dw_pcie_host_init(struct pcie_port *pp)
{
- struct device *dev = pp->dev;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
struct device_node *np = dev->of_node;
struct platform_device *pdev = to_platform_device(dev);
struct pci_bus *bus, *child;
@@ -508,10 +516,10 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
}
- if (!pp->dbi_base) {
- pp->dbi_base = devm_ioremap(dev, pp->cfg->start,
+ if (!pci->dbi_base) {
+ pci->dbi_base = devm_ioremap(dev, pp->cfg->start,
resource_size(pp->cfg));
- if (!pp->dbi_base) {
+ if (!pci->dbi_base) {
dev_err(dev, "error with ioremap\n");
ret = -ENOMEM;
goto error;
@@ -540,13 +548,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
}
}
- ret = of_property_read_u32(np, "num-lanes", &pp->lanes);
+ ret = of_property_read_u32(np, "num-lanes", &pci->lanes);
if (ret)
- pp->lanes = 0;
+ pci->lanes = 0;
- ret = of_property_read_u32(np, "num-viewport", &pp->num_viewport);
+ ret = of_property_read_u32(np, "num-viewport", &pci->num_viewport);
if (ret)
- pp->num_viewport = 2;
+ pci->num_viewport = 2;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
if (!pp->ops->msi_host_init) {
@@ -614,6 +622,7 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
if (pp->ops->rd_other_conf)
return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
@@ -633,12 +642,12 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
va_cfg_base = pp->va_cfg1_base;
}
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_read(va_cfg_base + where, size, val);
- if (pp->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
@@ -652,6 +661,7 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u32 busdev, cfg_size;
u64 cpu_addr;
void __iomem *va_cfg_base;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
if (pp->ops->wr_other_conf)
return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
@@ -671,12 +681,12 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
va_cfg_base = pp->va_cfg1_base;
}
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
type, cpu_addr,
busdev, cfg_size);
ret = dw_pcie_write(va_cfg_base + where, size, val);
- if (pp->num_viewport <= 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX1,
+ if (pci->num_viewport <= 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
@@ -686,9 +696,11 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
static int dw_pcie_valid_device(struct pcie_port *pp, struct pci_bus *bus,
int dev)
{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+
/* If there is no link, then there is no device */
if (bus->number != pp->root_bus_nr) {
- if (!dw_pcie_link_up(pp))
+ if (!dw_pcie_link_up(pci))
return 0;
}
@@ -737,11 +749,12 @@ static struct pci_ops dw_pcie_ops = {
void dw_pcie_setup_rc(struct pcie_port *pp)
{
u32 val;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
/* set the number of lanes */
- val = dw_pcie_readl_rc(pp, PCIE_PORT_LINK_CONTROL);
+ val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
val &= ~PORT_LINK_MODE_MASK;
- switch (pp->lanes) {
+ switch (pci->lanes) {
case 1:
val |= PORT_LINK_MODE_1_LANES;
break;
@@ -755,15 +768,15 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LINK_MODE_8_LANES;
break;
default:
- dev_err(pp->dev, "num-lanes %u: invalid value\n", pp->lanes);
+ dev_err(pci->dev, "num-lanes %u: invalid value\n", pci->lanes);
return;
}
- dw_pcie_writel_rc(pp, PCIE_PORT_LINK_CONTROL, val);
+ dw_pcie_writel_dbi(pci, PCIE_PORT_LINK_CONTROL, val);
/* set link width speed control register */
- val = dw_pcie_readl_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL);
+ val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
val &= ~PORT_LOGIC_LINK_WIDTH_MASK;
- switch (pp->lanes) {
+ switch (pci->lanes) {
case 1:
val |= PORT_LOGIC_LINK_WIDTH_1_LANES;
break;
@@ -777,30 +790,30 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
val |= PORT_LOGIC_LINK_WIDTH_8_LANES;
break;
}
- dw_pcie_writel_rc(pp, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
+ dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
/* setup RC BARs */
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_0, 0x00000004);
- dw_pcie_writel_rc(pp, PCI_BASE_ADDRESS_1, 0x00000000);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004);
+ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000);
/* setup interrupt pins */
- val = dw_pcie_readl_rc(pp, PCI_INTERRUPT_LINE);
+ val = dw_pcie_readl_dbi(pci, PCI_INTERRUPT_LINE);
val &= 0xffff00ff;
val |= 0x00000100;
- dw_pcie_writel_rc(pp, PCI_INTERRUPT_LINE, val);
+ dw_pcie_writel_dbi(pci, PCI_INTERRUPT_LINE, val);
/* setup bus numbers */
- val = dw_pcie_readl_rc(pp, PCI_PRIMARY_BUS);
+ val = dw_pcie_readl_dbi(pci, PCI_PRIMARY_BUS);
val &= 0xff000000;
val |= 0x00010100;
- dw_pcie_writel_rc(pp, PCI_PRIMARY_BUS, val);
+ dw_pcie_writel_dbi(pci, PCI_PRIMARY_BUS, val);
/* setup command register */
- val = dw_pcie_readl_rc(pp, PCI_COMMAND);
+ val = dw_pcie_readl_dbi(pci, PCI_COMMAND);
val &= 0xffff0000;
val |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
- dw_pcie_writel_rc(pp, PCI_COMMAND, val);
+ dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
/*
* If the platform provides ->rd_other_conf, it means the platform
@@ -809,15 +822,15 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
*/
if (!pp->ops->rd_other_conf) {
/* get iATU unroll support */
- pp->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pp);
- dev_dbg(pp->dev, "iATU unroll: %s\n",
- pp->iatu_unroll_enabled ? "enabled" : "disabled");
+ pci->iatu_unroll_enabled = dw_pcie_iatu_unroll_enabled(pci);
+ dev_dbg(pci->dev, "iATU unroll: %s\n",
+ pci->iatu_unroll_enabled ? "enabled" : "disabled");
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX0,
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX0,
PCIE_ATU_TYPE_MEM, pp->mem_base,
pp->mem_bus_addr, pp->mem_size);
- if (pp->num_viewport > 2)
- dw_pcie_prog_outbound_atu(pp, PCIE_ATU_REGION_INDEX2,
+ if (pci->num_viewport > 2)
+ dw_pcie_prog_outbound_atu(pci, PCIE_ATU_REGION_INDEX2,
PCIE_ATU_TYPE_IO, pp->io_base,
pp->io_bus_addr, pp->io_size);
}