summaryrefslogtreecommitdiff
path: root/arch/powerpc/sysdev/fsl_pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/sysdev/fsl_pci.c')
-rw-r--r--arch/powerpc/sysdev/fsl_pci.c138
1 files changed, 118 insertions, 20 deletions
diff --git a/arch/powerpc/sysdev/fsl_pci.c b/arch/powerpc/sysdev/fsl_pci.c
index 78021d8afc5..ae88b144801 100644
--- a/arch/powerpc/sysdev/fsl_pci.c
+++ b/arch/powerpc/sysdev/fsl_pci.c
@@ -23,6 +23,8 @@
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
+#include <linux/lmb.h>
+#include <linux/log2.h>
#include <asm/io.h>
#include <asm/prom.h>
@@ -96,7 +98,13 @@ static void __init setup_pci_atmu(struct pci_controller *hose,
struct resource *rsrc)
{
struct ccsr_pci __iomem *pci;
- int i, j, n;
+ int i, j, n, mem_log, win_idx = 2;
+ u64 mem, sz, paddr_hi = 0;
+ u64 paddr_lo = ULLONG_MAX;
+ u32 pcicsrbar = 0, pcicsrbar_sz;
+ u32 piwar = PIWAR_EN | PIWAR_PF | PIWAR_TGI_LOCAL |
+ PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
+ char *name = hose->dn->full_name;
pr_debug("PCI memory map start 0x%016llx, size 0x%016llx\n",
(u64)rsrc->start, (u64)rsrc->end - (u64)rsrc->start + 1);
@@ -117,6 +125,9 @@ static void __init setup_pci_atmu(struct pci_controller *hose,
if (!(hose->mem_resources[i].flags & IORESOURCE_MEM))
continue;
+ paddr_lo = min(paddr_lo, (u64)hose->mem_resources[i].start);
+ paddr_hi = max(paddr_hi, (u64)hose->mem_resources[i].end);
+
n = setup_one_atmu(pci, j, &hose->mem_resources[i],
hose->pci_mem_offset);
@@ -147,10 +158,105 @@ static void __init setup_pci_atmu(struct pci_controller *hose,
}
}
- /* Setup 2G inbound Memory Window @ 1 */
- out_be32(&pci->piw[2].pitar, 0x00000000);
- out_be32(&pci->piw[2].piwbar,0x00000000);
- out_be32(&pci->piw[2].piwar, PIWAR_2G);
+ /* convert to pci address space */
+ paddr_hi -= hose->pci_mem_offset;
+ paddr_lo -= hose->pci_mem_offset;
+
+ if (paddr_hi == paddr_lo) {
+ pr_err("%s: No outbound window space\n", name);
+ return ;
+ }
+
+ if (paddr_lo == 0) {
+ pr_err("%s: No space for inbound window\n", name);
+ return ;
+ }
+
+ /* setup PCSRBAR/PEXCSRBAR */
+ early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, 0xffffffff);
+ early_read_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, &pcicsrbar_sz);
+ pcicsrbar_sz = ~pcicsrbar_sz + 1;
+
+ if (paddr_hi < (0x100000000ull - pcicsrbar_sz) ||
+ (paddr_lo > 0x100000000ull))
+ pcicsrbar = 0x100000000ull - pcicsrbar_sz;
+ else
+ pcicsrbar = (paddr_lo - pcicsrbar_sz) & -pcicsrbar_sz;
+ early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, pcicsrbar);
+
+ paddr_lo = min(paddr_lo, (u64)pcicsrbar);
+
+ pr_info("%s: PCICSRBAR @ 0x%x\n", name, pcicsrbar);
+
+ /* Setup inbound mem window */
+ mem = lmb_end_of_DRAM();
+ sz = min(mem, paddr_lo);
+ mem_log = __ilog2_u64(sz);
+
+ /* PCIe can overmap inbound & outbound since RX & TX are separated */
+ if (early_find_capability(hose, 0, 0, PCI_CAP_ID_EXP)) {
+ /* Size window to exact size if power-of-two or one size up */
+ if ((1ull << mem_log) != mem) {
+ if ((1ull << mem_log) > mem)
+ pr_info("%s: Setting PCI inbound window "
+ "greater than memory size\n", name);
+ mem_log++;
+ }
+
+ piwar |= (mem_log - 1);
+
+ /* Setup inbound memory window */
+ out_be32(&pci->piw[win_idx].pitar, 0x00000000);
+ out_be32(&pci->piw[win_idx].piwbar, 0x00000000);
+ out_be32(&pci->piw[win_idx].piwar, piwar);
+ win_idx--;
+
+ hose->dma_window_base_cur = 0x00000000;
+ hose->dma_window_size = (resource_size_t)sz;
+ } else {
+ u64 paddr = 0;
+
+ /* Setup inbound memory window */
+ out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
+ out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
+ out_be32(&pci->piw[win_idx].piwar, (piwar | (mem_log - 1)));
+ win_idx--;
+
+ paddr += 1ull << mem_log;
+ sz -= 1ull << mem_log;
+
+ if (sz) {
+ mem_log = __ilog2_u64(sz);
+ piwar |= (mem_log - 1);
+
+ out_be32(&pci->piw[win_idx].pitar, paddr >> 12);
+ out_be32(&pci->piw[win_idx].piwbar, paddr >> 12);
+ out_be32(&pci->piw[win_idx].piwar, piwar);
+ win_idx--;
+
+ paddr += 1ull << mem_log;
+ }
+
+ hose->dma_window_base_cur = 0x00000000;
+ hose->dma_window_size = (resource_size_t)paddr;
+ }
+
+ if (hose->dma_window_size < mem) {
+#ifndef CONFIG_SWIOTLB
+ pr_err("%s: ERROR: Memory size exceeds PCI ATMU ability to "
+ "map - enable CONFIG_SWIOTLB to avoid dma errors.\n",
+ name);
+#endif
+ /* adjusting outbound windows could reclaim space in mem map */
+ if (paddr_hi < 0xffffffffull)
+ pr_warning("%s: WARNING: Outbound window cfg leaves "
+ "gaps in memory map. Adjusting the memory map "
+ "could reduce unnecessary bounce buffering.\n",
+ name);
+
+ pr_info("%s: DMA window size is 0x%llx\n", name,
+ (u64)hose->dma_window_size);
+ }
iounmap(pci);
}
@@ -176,19 +282,9 @@ static void __init setup_pci_cmd(struct pci_controller *hose)
}
}
-static void __init setup_pci_pcsrbar(struct pci_controller *hose)
-{
-#ifdef CONFIG_PCI_MSI
- phys_addr_t immr_base;
-
- immr_base = get_immrbase();
- early_write_config_dword(hose, 0, 0, PCI_BASE_ADDRESS_0, immr_base);
-#endif
-}
-
void fsl_pcibios_fixup_bus(struct pci_bus *bus)
{
- struct pci_controller *hose = (struct pci_controller *) bus->sysdata;
+ struct pci_controller *hose = pci_bus_to_host(bus);
int i;
if ((bus->parent == hose->bus) &&
@@ -269,8 +365,6 @@ int __init fsl_add_bridge(struct device_node *dev, int is_primary)
/* Setup PEX window registers */
setup_pci_atmu(hose, &rsrc);
- /* Setup PEXCSRBAR */
- setup_pci_pcsrbar(hose);
return 0;
}
@@ -281,6 +375,8 @@ DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8543, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8547E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8545, quirk_fsl_pcie_header);
+DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569E, quirk_fsl_pcie_header);
+DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8569, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568E, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8568, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8567E, quirk_fsl_pcie_header);
@@ -296,6 +392,8 @@ DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8536, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8641D, quirk_fsl_pcie_header);
DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_MPC8610, quirk_fsl_pcie_header);
+DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020E, quirk_fsl_pcie_header);
+DECLARE_PCI_FIXUP_HEADER(0x1957, PCI_DEVICE_ID_P2020, quirk_fsl_pcie_header);
#endif /* CONFIG_PPC_85xx || CONFIG_PPC_86xx */
#if defined(CONFIG_PPC_83xx) || defined(CONFIG_PPC_MPC512x)
@@ -324,7 +422,7 @@ struct mpc83xx_pcie_priv {
static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose = pci_bus_to_host(bus);
if (hose->indirect_type & PPC_INDIRECT_TYPE_NO_PCIE_LINK)
return PCIBIOS_DEVICE_NOT_FOUND;
@@ -350,7 +448,7 @@ static int mpc83xx_pcie_exclude_device(struct pci_bus *bus, unsigned int devfn)
static void __iomem *mpc83xx_pcie_remap_cfg(struct pci_bus *bus,
unsigned int devfn, int offset)
{
- struct pci_controller *hose = bus->sysdata;
+ struct pci_controller *hose = pci_bus_to_host(bus);
struct mpc83xx_pcie_priv *pcie = hose->dn->data;
u8 bus_no = bus->number - hose->first_busno;
u32 dev_base = bus_no << 24 | devfn << 16;
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 12:31:42 +0000