Messages in this thread Patch in this message | | | From | John Allen <> | Subject | [PATCH v3 1/4] RAS/AMD/ATL: Read DRAM hole base early | Date | Thu, 18 Apr 2024 16:14:14 +0000 |
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Read DRAM hole base when constructing the address map as the value will not change during run time.
Reviewed-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: John Allen <john.allen@amd.com> --- v2: - Fix compilation error. ctx->addr should read ctx->ret_addr. - Improve commit description. v3: - Include "0x" prefix for dram_hole_base print --- drivers/ras/amd/atl/core.c | 15 ++------------- drivers/ras/amd/atl/internal.h | 2 ++ drivers/ras/amd/atl/system.c | 21 +++++++++++++++++++++ 3 files changed, 25 insertions(+), 13 deletions(-)
diff --git a/drivers/ras/amd/atl/core.c b/drivers/ras/amd/atl/core.c index 6dc4e06305f7..63513d972c07 100644 --- a/drivers/ras/amd/atl/core.c +++ b/drivers/ras/amd/atl/core.c @@ -51,22 +51,11 @@ static bool legacy_hole_en(struct addr_ctx *ctx) static int add_legacy_hole(struct addr_ctx *ctx) { - u32 dram_hole_base; - u8 func = 0; - if (!legacy_hole_en(ctx)) return 0; - if (df_cfg.rev >= DF4) - func = 7; - - if (df_indirect_read_broadcast(ctx->node_id, func, 0x104, &dram_hole_base)) - return -EINVAL; - - dram_hole_base &= DF_DRAM_HOLE_BASE_MASK; - - if (ctx->ret_addr >= dram_hole_base) - ctx->ret_addr += (BIT_ULL(32) - dram_hole_base); + if (ctx->ret_addr >= df_cfg.dram_hole_base) + ctx->ret_addr += (BIT_ULL(32) - df_cfg.dram_hole_base); return 0; } diff --git a/drivers/ras/amd/atl/internal.h b/drivers/ras/amd/atl/internal.h index 5de69e0bb0f9..1413c8ddc6c5 100644 --- a/drivers/ras/amd/atl/internal.h +++ b/drivers/ras/amd/atl/internal.h @@ -132,6 +132,8 @@ struct df_config { /* Number of DRAM Address maps visible in a Coherent Station. */ u8 num_coh_st_maps; + u32 dram_hole_base; + /* Global flags to handle special cases. */ struct df_flags flags; }; diff --git a/drivers/ras/amd/atl/system.c b/drivers/ras/amd/atl/system.c index 701349e84942..a4314f5073ab 100644 --- a/drivers/ras/amd/atl/system.c +++ b/drivers/ras/amd/atl/system.c @@ -223,6 +223,21 @@ static int determine_df_rev(void) return -EINVAL; } +static int get_dram_hole_base(void) +{ + u8 func = 0; + + if (df_cfg.rev >= DF4) + func = 7; + + if (df_indirect_read_broadcast(0, func, 0x104, &df_cfg.dram_hole_base)) + return -EINVAL; + + df_cfg.dram_hole_base &= DF_DRAM_HOLE_BASE_MASK; + + return 0; +} + static void get_num_maps(void) { switch (df_cfg.rev) { @@ -266,6 +281,7 @@ static void dump_df_cfg(void) pr_debug("num_coh_st_maps=%u", df_cfg.num_coh_st_maps); + pr_debug("dram_hole_base=0x%x", df_cfg.dram_hole_base); pr_debug("flags.legacy_ficaa=%u", df_cfg.flags.legacy_ficaa); pr_debug("flags.socket_id_shift_quirk=%u", df_cfg.flags.socket_id_shift_quirk); } @@ -282,6 +298,11 @@ int get_df_system_info(void) get_num_maps(); + if (get_dram_hole_base()) { + pr_warn("amd_atl: Failed to read DRAM hole base"); + return -EINVAL; + } + dump_df_cfg(); return 0; -- 2.34.1
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