@@ -21,6 +21,7 @@ config RCAR_GEN3
imply CMD_GPT
imply CMD_UUID
imply CMD_MMC_SWRITE if MMC
+ imply OF_BOARD_SETUP if PCI
imply SUPPORT_EMMC_RPMB if MMC
imply SPL
imply SPL_BOARD_INIT
@@ -8,6 +8,8 @@
*/
#include <common.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
#include <asm/arch/rmobile.h>
#ifdef CONFIG_RCAR_GEN3
@@ -46,4 +48,55 @@ int dram_init_banksize(void)
return 0;
}
+
+#if CONFIG_IS_ENABLED(OF_BOARD_SETUP) && CONFIG_IS_ENABLED(PCI)
+int ft_board_setup(void *blob, bd_t *bd)
+{
+ struct udevice *dev;
+ struct uclass *uc;
+ fdt_addr_t regs_addr;
+ int i, off, ret;
+
+ ret = uclass_get(UCLASS_PCI, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ struct pci_controller hose = { 0 };
+
+ /*
+ * Limit the number of memory regions to 2, which is the
+ * maximum that older Linux kernel versions can handle
+ * without aborting.
+ */
+ for (i = 0; i < min(CONFIG_NR_DRAM_BANKS, 2); i++) {
+ if (hose.region_count == MAX_PCI_REGIONS) {
+ printf("maximum number of regions parsed, aborting\n");
+ break;
+ }
+
+ if (bd->bi_dram[i].size) {
+ pci_set_region(&hose.regions[hose.region_count++],
+ bd->bi_dram[i].start,
+ bd->bi_dram[i].start,
+ bd->bi_dram[i].size,
+ PCI_REGION_MEM |
+ PCI_REGION_SYS_MEMORY);
+ }
+ }
+
+ regs_addr = devfdt_get_addr_index(dev, 0);
+ off = fdt_node_offset_by_compat_reg(blob,
+ "renesas,pcie-rcar-gen3", regs_addr);
+ if (off < 0) {
+ printf("Failed to find PCIe node@%llx\n", regs_addr);
+ return off;
+ }
+
+ fdt_pci_dma_ranges(blob, off, &hose);
+ }
+
+ return 0;
+}
+#endif
#endif
Update "dma-ranges" DT property of all PCIe controllers in the system with the up-to-date DRAM layout. This allows the PCIe controller take full advantage of all the available DRAM, at least in theory. This patch only populates up to two dma-ranges entry though, this is because older versions of Linux kernel would fail to probe the PCIe driver if there are more regions in the DT than the PCIe IP can use. Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com> Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org> --- arch/arm/mach-rmobile/Kconfig | 1 + board/renesas/rcar-common/common.c | 53 ++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+)