From 07bc0d60898d812f3c5793d4c020e748342176b2 Mon Sep 17 00:00:00 2001 From: Eddi De Pieri Date: Tue, 8 Nov 2016 17:38:03 +0100 Subject: [PATCH] lantiq: fix pci issue if mem kernel parameter is used As specified by e0229a16b0001c08e6c2611fa0bb9814507fced4 if the VR9 based router provides FXS ports and they should enabled then the following must added to the kernel command line: mem=[TOTALMEMSIZE-2M] vpe1_load_addr=ADDRESS vpe1_mem=2M By adding mem= parameter a pci device stop working correctly. The pci-lantiq.c module use get_num_physpages() to compute dynamically the memory amount of the board. The mem= make the module to compute in the wrong way the BAR11MASK, so in this situation the mask is misaligned with the dma area that the hardware expects. This patch is a port of what legacy ifxmips_pci.c does. Signed-off-by: Eddi De Pieri --- .../0154-lantiq-pci-bar11mask-fix.patch | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 target/linux/lantiq/patches-4.4/0154-lantiq-pci-bar11mask-fix.patch diff --git a/target/linux/lantiq/patches-4.4/0154-lantiq-pci-bar11mask-fix.patch b/target/linux/lantiq/patches-4.4/0154-lantiq-pci-bar11mask-fix.patch new file mode 100644 index 000000000000..0f564c4d575f --- /dev/null +++ b/target/linux/lantiq/patches-4.4/0154-lantiq-pci-bar11mask-fix.patch @@ -0,0 +1,22 @@ +--- a/arch/mips/pci/pci-lantiq.c ++++ b/arch/mips/pci/pci-lantiq.c +@@ -62,6 +62,8 @@ + #define ltq_pci_cfg_w32(x, y) ltq_w32((x), ltq_pci_mapped_cfg + (y)) + #define ltq_pci_cfg_r32(x) ltq_r32(ltq_pci_mapped_cfg + (x)) + ++extern u32 max_low_pfn; ++ + __iomem void *ltq_pci_mapped_cfg; + static __iomem void *ltq_pci_membase; + +@@ -87,8 +89,8 @@ + u32 mem, bar11mask; + + /* BAR11MASK value depends on available memory on system. */ +- mem = get_num_physpages() * PAGE_SIZE; +- bar11mask = (0x0ffffff0 & ~((1 << (fls(mem) - 1)) - 1)) | 8; ++ mem = max_low_pfn << PAGE_SHIFT; ++ bar11mask = ((-roundup_pow_of_two(mem)) & 0x0F000000) | 8; + + return bar11mask; + } -- 2.30.2