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path: root/drivers/pci/pcie_layerscape.c
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Diffstat (limited to 'drivers/pci/pcie_layerscape.c')
-rw-r--r--drivers/pci/pcie_layerscape.c217
1 files changed, 147 insertions, 70 deletions
diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c
index 99f9c83fa4..0ba960e248 100644
--- a/drivers/pci/pcie_layerscape.c
+++ b/drivers/pci/pcie_layerscape.c
@@ -93,6 +93,7 @@ struct ls_pcie {
void __iomem *dbi;
void __iomem *va_cfg0;
void __iomem *va_cfg1;
+ int next_lut_index;
struct pci_controller hose;
};
@@ -482,6 +483,147 @@ static void ls_pcie_setup_ep(struct ls_pcie *pcie, struct ls_pcie_info *info)
}
}
+#ifdef CONFIG_FSL_LSCH3
+/*
+ * Return next available LUT index.
+ */
+static int ls_pcie_next_lut_index(struct ls_pcie *pcie)
+{
+ if (pcie->next_lut_index < PCIE_LUT_ENTRY_COUNT)
+ return pcie->next_lut_index++;
+ else
+ return -1; /* LUT is full */
+}
+
+/*
+ * Program a single LUT entry
+ */
+static void ls_pcie_lut_set_mapping(struct ls_pcie *pcie, int index, u32 devid,
+ u32 streamid)
+{
+ void __iomem *lut;
+
+ lut = pcie->dbi + PCIE_LUT_BASE;
+
+ /* leave mask as all zeroes, want to match all bits */
+ writel((devid << 16), lut + PCIE_LUT_UDR(index));
+ writel(streamid | PCIE_LUT_ENABLE, lut + PCIE_LUT_LDR(index));
+}
+
+/* returns the next available streamid */
+static u32 ls_pcie_next_streamid(void)
+{
+ static int next_stream_id = FSL_PEX_STREAM_ID_START;
+
+ if (next_stream_id > FSL_PEX_STREAM_ID_END)
+ return 0xffffffff;
+
+ return next_stream_id++;
+}
+
+/*
+ * An msi-map is a property to be added to the pci controller
+ * node. It is a table, where each entry consists of 4 fields
+ * e.g.:
+ *
+ * msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count]
+ * [devid] [phandle-to-msi-ctrl] [stream-id] [count]>;
+ */
+static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie,
+ u32 devid, u32 streamid)
+{
+ char pcie_path[19];
+ u32 *prop;
+ u32 phandle;
+ int nodeoffset;
+
+ /* find pci controller node */
+ snprintf(pcie_path, sizeof(pcie_path), "/soc/pcie@%llx",
+ (u64)pcie->dbi);
+ nodeoffset = fdt_path_offset(blob, pcie_path);
+ if (nodeoffset < 0) {
+ printf("\n%s: ERROR: unable to update PCIe node: %s\n",
+ __func__, pcie_path);
+ return;
+ }
+
+ /* get phandle to MSI controller */
+ prop = (u32 *)fdt_getprop(blob, nodeoffset, "msi-parent", 0);
+ if (prop == NULL) {
+ printf("\n%s: ERROR: missing msi-parent: %s\n", __func__,
+ pcie_path);
+ return;
+ }
+ phandle = be32_to_cpu(*prop);
+
+ /* set one msi-map row */
+ fdt_appendprop_u32(blob, nodeoffset, "msi-map", devid);
+ fdt_appendprop_u32(blob, nodeoffset, "msi-map", phandle);
+ fdt_appendprop_u32(blob, nodeoffset, "msi-map", streamid);
+ fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1);
+}
+
+static void fdt_fixup_pcie(void *blob)
+{
+ unsigned int found_multi = 0;
+ unsigned char header_type;
+ int index;
+ u32 streamid;
+ pci_dev_t dev;
+ int bus;
+ unsigned short id;
+ struct pci_controller *hose;
+ struct ls_pcie *pcie;
+ int i;
+
+ for (i = 0, hose = pci_get_hose_head(); hose; hose = hose->next, i++) {
+ pcie = hose->priv_data;
+ for (bus = hose->first_busno; bus <= hose->last_busno; bus++) {
+
+ for (dev = PCI_BDF(bus, 0, 0);
+ dev < PCI_BDF(bus, PCI_MAX_PCI_DEVICES - 1,
+ PCI_MAX_PCI_FUNCTIONS - 1);
+ dev += PCI_BDF(0, 0, 1)) {
+
+ if (PCI_FUNC(dev) && !found_multi)
+ continue;
+
+ pci_read_config_word(dev, PCI_VENDOR_ID, &id);
+
+ pci_read_config_byte(dev, PCI_HEADER_TYPE,
+ &header_type);
+
+ if ((id == 0xFFFF) || (id == 0x0000))
+ continue;
+
+ if (!PCI_FUNC(dev))
+ found_multi = header_type & 0x80;
+
+ streamid = ls_pcie_next_streamid();
+ if (streamid == 0xffffffff) {
+ printf("ERROR: no stream ids free\n");
+ continue;
+ }
+
+ index = ls_pcie_next_lut_index(pcie);
+ if (index < 0) {
+ printf("ERROR: no LUT indexes free\n");
+ continue;
+ }
+
+ /* map PCI b.d.f to streamID in LUT */
+ ls_pcie_lut_set_mapping(pcie, index, dev >> 8,
+ streamid);
+
+ /* update msi-map in device tree */
+ fdt_pcie_set_msi_map_entry(blob, pcie, dev >> 8,
+ streamid);
+ }
+ }
+ }
+}
+#endif
+
int ls_pcie_init_ctrl(int busno, enum srds_prtcl dev, struct ls_pcie_info *info)
{
struct ls_pcie *pcie;
@@ -513,6 +655,7 @@ int ls_pcie_init_ctrl(int busno, enum srds_prtcl dev, struct ls_pcie_info *info)
pcie->va_cfg1 = map_physmem(info->cfg1_phys,
info->cfg1_size,
MAP_NOCACHE);
+ pcie->next_lut_index = 0;
/* outbound memory */
pci_set_region(&hose->regions[0],
@@ -657,6 +800,10 @@ void ft_pci_setup(void *blob, bd_t *bd)
#ifdef CONFIG_PCIE4
ft_pcie_ls_setup(blob, FSL_PCIE_COMPAT, CONFIG_SYS_PCIE4_ADDR, PCIE4);
#endif
+
+ #ifdef CONFIG_FSL_LSCH3
+ fdt_fixup_pcie(blob);
+ #endif
}
#else
@@ -664,73 +811,3 @@ void ft_pci_setup(void *blob, bd_t *bd)
{
}
#endif
-
-#if defined(CONFIG_LS2080A) || defined(CONFIG_LS2085A)
-
-void pcie_set_available_streamids(void *blob, const char *pcie_path,
- u32 *stream_ids, int count)
-{
- int nodeoffset;
- int i;
-
- nodeoffset = fdt_path_offset(blob, pcie_path);
- if (nodeoffset < 0) {
- printf("\n%s: ERROR: unable to update PCIe node\n", __func__);
- return;
- }
-
- /* for each stream ID, append to mmu-masters */
- for (i = 0; i < count; i++) {
- fdt_appendprop_u32(blob, nodeoffset, "available-stream-ids",
- stream_ids[i]);
- }
-}
-
-#define MAX_STREAM_IDS 4
-void fdt_fixup_smmu_pcie(void *blob)
-{
- int count;
- u32 stream_ids[MAX_STREAM_IDS];
- u32 ctlr_streamid = 0x300;
-
- #ifdef CONFIG_PCIE1
- /* PEX1 stream ID fixup */
- count = FSL_PEX1_STREAM_ID_END - FSL_PEX1_STREAM_ID_START + 1;
- alloc_stream_ids(FSL_PEX1_STREAM_ID_START, count, stream_ids,
- MAX_STREAM_IDS);
- pcie_set_available_streamids(blob, "/pcie@3400000", stream_ids, count);
- append_mmu_masters(blob, "/iommu@5000000", "/pcie@3400000",
- &ctlr_streamid, 1);
- #endif
-
- #ifdef CONFIG_PCIE2
- /* PEX2 stream ID fixup */
- count = FSL_PEX2_STREAM_ID_END - FSL_PEX2_STREAM_ID_START + 1;
- alloc_stream_ids(FSL_PEX2_STREAM_ID_START, count, stream_ids,
- MAX_STREAM_IDS);
- pcie_set_available_streamids(blob, "/pcie@3500000", stream_ids, count);
- append_mmu_masters(blob, "/iommu@5000000", "/pcie@3500000",
- &ctlr_streamid, 1);
- #endif
-
- #ifdef CONFIG_PCIE3
- /* PEX3 stream ID fixup */
- count = FSL_PEX3_STREAM_ID_END - FSL_PEX3_STREAM_ID_START + 1;
- alloc_stream_ids(FSL_PEX3_STREAM_ID_START, count, stream_ids,
- MAX_STREAM_IDS);
- pcie_set_available_streamids(blob, "/pcie@3600000", stream_ids, count);
- append_mmu_masters(blob, "/iommu@5000000", "/pcie@3600000",
- &ctlr_streamid, 1);
- #endif
-
- #ifdef CONFIG_PCIE4
- /* PEX4 stream ID fixup */
- count = FSL_PEX4_STREAM_ID_END - FSL_PEX4_STREAM_ID_START + 1;
- alloc_stream_ids(FSL_PEX4_STREAM_ID_START, count, stream_ids,
- MAX_STREAM_IDS);
- pcie_set_available_streamids(blob, "/pcie@3700000", stream_ids, count);
- append_mmu_masters(blob, "/iommu@5000000", "/pcie@3700000",
- &ctlr_streamid, 1);
- #endif
-}
-#endif
generated by cgit (git 2.34.1) at 2024-12-24 03:25:08 +0000