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Merge branch 'remotes/lorenzo/pci/aardvark'

Browse source 
- Remove Aardvark outbound window configuration (Evan Wang)

  - Fix Aardvark bridge window sizing issue (Zachary Zhang)

  - Convert Aardvark to use pci_host_probe() to reduce code duplication
    (Thomas Petazzoni)

* remotes/lorenzo/pci/aardvark:
  PCI: aardvark: Convert to use pci_host_probe()
  PCI: aardvark: Size bridges before resources allocation
  PCI: aardvark: Remove PCIe outbound window configuration
  PCI: aardvark: Introduce an advk_pcie_valid_device() helper

# Conflicts:
#	drivers/pci/controller/pci-aardvark.c
This commit is contained in:
Bjorn Helgaas 2018-08-15 14:59:09 -05:00
commit ce342a1aa8
1 changed files with 12 additions and 67 deletions
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79
drivers/pci/controller/pci-aardvark.c
View file

@ -111,24 +111,6 @@
#define PCIE_MSI_MASK_REG (CONTROL_BASE_ADDR + 0x5C)
#define PCIE_MSI_PAYLOAD_REG (CONTROL_BASE_ADDR + 0x9C)
/* PCIe window configuration */
#define OB_WIN_BASE_ADDR 0x4c00
#define OB_WIN_BLOCK_SIZE 0x20
#define OB_WIN_REG_ADDR(win, offset) (OB_WIN_BASE_ADDR + \
OB_WIN_BLOCK_SIZE * (win) + \
(offset))
#define OB_WIN_MATCH_LS(win) OB_WIN_REG_ADDR(win, 0x00)
#define OB_WIN_MATCH_MS(win) OB_WIN_REG_ADDR(win, 0x04)
#define OB_WIN_REMAP_LS(win) OB_WIN_REG_ADDR(win, 0x08)
#define OB_WIN_REMAP_MS(win) OB_WIN_REG_ADDR(win, 0x0c)
#define OB_WIN_MASK_LS(win) OB_WIN_REG_ADDR(win, 0x10)
#define OB_WIN_MASK_MS(win) OB_WIN_REG_ADDR(win, 0x14)
#define OB_WIN_ACTIONS(win) OB_WIN_REG_ADDR(win, 0x18)
/* PCIe window types */
#define OB_PCIE_MEM 0x0
#define OB_PCIE_IO 0x4
/* LMI registers base address and register offsets */
#define LMI_BASE_ADDR 0x6000
#define CFG_REG (LMI_BASE_ADDR + 0x0)
@ -247,34 +229,9 @@ static int advk_pcie_wait_for_link(struct advk_pcie *pcie)
return -ETIMEDOUT;
}
/*
* Set PCIe address window register which could be used for memory
* mapping.
*/
static void advk_pcie_set_ob_win(struct advk_pcie *pcie,
u32 win_num, u32 match_ms,
u32 match_ls, u32 mask_ms,
u32 mask_ls, u32 remap_ms,
u32 remap_ls, u32 action)
{
advk_writel(pcie, match_ls, OB_WIN_MATCH_LS(win_num));
advk_writel(pcie, match_ms, OB_WIN_MATCH_MS(win_num));
advk_writel(pcie, mask_ms, OB_WIN_MASK_MS(win_num));
advk_writel(pcie, mask_ls, OB_WIN_MASK_LS(win_num));
advk_writel(pcie, remap_ms, OB_WIN_REMAP_MS(win_num));
advk_writel(pcie, remap_ls, OB_WIN_REMAP_LS(win_num));
advk_writel(pcie, action, OB_WIN_ACTIONS(win_num));
advk_writel(pcie, match_ls | BIT(0), OB_WIN_MATCH_LS(win_num));
}
static void advk_pcie_setup_hw(struct advk_pcie *pcie)
{
u32 reg;
int i;
/* Point PCIe unit MBUS decode windows to DRAM space */
for (i = 0; i < 8; i++)
advk_pcie_set_ob_win(pcie, i, 0, 0, 0, 0, 0, 0, 0);
/* Set to Direct mode */
reg = advk_readl(pcie, CTRL_CONFIG_REG);
@ -433,6 +390,15 @@ static int advk_pcie_wait_pio(struct advk_pcie *pcie)
return -ETIMEDOUT;
}
static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus,
int devfn)
{
if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
return false;
return true;
}
static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
int where, int size, u32 *val)
{
@ -440,7 +406,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
u32 reg;
int ret;
if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0) {
if (!advk_pcie_valid_device(pcie, bus, devfn)) {
*val = 0xffffffff;
return PCIBIOS_DEVICE_NOT_FOUND;
}
@ -494,7 +460,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
int offset;
int ret;
if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
if (!advk_pcie_valid_device(pcie, bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
if (where % size)
@ -843,12 +809,6 @@ static int advk_pcie_parse_request_of_pci_ranges(struct advk_pcie *pcie)
switch (resource_type(res)) {
case IORESOURCE_IO:
advk_pcie_set_ob_win(pcie, 1,
upper_32_bits(res->start),
lower_32_bits(res->start),
0, 0xF8000000, 0,
lower_32_bits(res->start),
OB_PCIE_IO);
err = devm_pci_remap_iospace(dev, res, iobase);
if (err) {
dev_warn(dev, "error %d: failed to map resource %pR\n",
@ -857,12 +817,6 @@ static int advk_pcie_parse_request_of_pci_ranges(struct advk_pcie *pcie)
}
break;
case IORESOURCE_MEM:
advk_pcie_set_ob_win(pcie, 0,
upper_32_bits(res->start),
lower_32_bits(res->start),
0x0, 0xF8000000, 0,
lower_32_bits(res->start),
(2 << 20) | OB_PCIE_MEM);
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
break;
case IORESOURCE_BUS:
@ -889,7 +843,6 @@ static int advk_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct advk_pcie *pcie;
struct resource *res;
struct pci_bus *bus, *child;
struct pci_host_bridge *bridge;
int ret, irq;
@ -943,21 +896,13 @@ static int advk_pcie_probe(struct platform_device *pdev)
bridge->map_irq = of_irq_parse_and_map_pci;
bridge->swizzle_irq = pci_common_swizzle;
ret = pci_scan_root_bus_bridge(bridge);
ret = pci_host_probe(bridge);
if (ret < 0) {
advk_pcie_remove_msi_irq_domain(pcie);
advk_pcie_remove_irq_domain(pcie);
return ret;
}
bus = bridge->bus;
pci_bus_assign_resources(bus);
list_for_each_entry(child, &bus->children, node)
pcie_bus_configure_settings(child);
pci_bus_add_devices(bus);
return 0;
}