diff options
| -rw-r--r-- | drivers/edac/amd64_edac.c | 38 | ||||
| -rw-r--r-- | drivers/edac/amd64_edac.h | 2 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 7a7bd7785ed..9ea1bb4a51e 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -1331,6 +1331,42 @@ static int f10_lookup_addr_in_dct(u64 in_addr, u32 nid, u8 dct) return cs_found; } +/* + * See F2x10C. Non-interleaved graphics framebuffer memory under the 16G is + * swapped with a region located at the bottom of memory so that the GPU can use + * the interleaved region and thus two channels. + */ +static u64 f10_swap_interleaved_region(struct amd64_pvt *pvt, u64 sys_addr) +{ + u32 swap_reg, swap_base, swap_limit, rgn_size, tmp_addr; + + if (boot_cpu_data.x86 == 0x10) { + /* only revC3 and revE have that feature */ + if (boot_cpu_data.x86_model < 4 || + (boot_cpu_data.x86_model < 0xa && + boot_cpu_data.x86_mask < 3)) + return sys_addr; + } + + amd64_read_dct_pci_cfg(pvt, SWAP_INTLV_REG, &swap_reg); + + if (!(swap_reg & 0x1)) + return sys_addr; + + swap_base = (swap_reg >> 3) & 0x7f; + swap_limit = (swap_reg >> 11) & 0x7f; + rgn_size = (swap_reg >> 20) & 0x7f; + tmp_addr = sys_addr >> 27; + + if (!(sys_addr >> 34) && + (((tmp_addr >= swap_base) && + (tmp_addr <= swap_limit)) || + (tmp_addr < rgn_size))) + return sys_addr ^ (u64)swap_base << 27; + + return sys_addr; +} + /* For a given @dram_range, check if @sys_addr falls within it. */ static int f10_match_to_this_node(struct amd64_pvt *pvt, int range, u64 sys_addr, int *nid, int *chan_sel) @@ -1352,6 +1388,8 @@ static int f10_match_to_this_node(struct amd64_pvt *pvt, int range, (intlv_sel != ((sys_addr >> 12) & intlv_en))) return -EINVAL; + sys_addr = f10_swap_interleaved_region(pvt, sys_addr); + dct_sel_base = dct_sel_baseaddr(pvt); /* diff --git a/drivers/edac/amd64_edac.h b/drivers/edac/amd64_edac.h index 6ae8aa8cc17..85e3acbc087 100644 --- a/drivers/edac/amd64_edac.h +++ b/drivers/edac/amd64_edac.h @@ -239,6 +239,8 @@ #define dct_dram_enabled(pvt) ((pvt)->dct_sel_lo & BIT(8)) #define dct_memory_cleared(pvt) ((pvt)->dct_sel_lo & BIT(10)) +#define SWAP_INTLV_REG 0x10c + #define DCT_SEL_HI 0x114 /* |