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Wed, 23 Jun 2021 19:20:44 +0000 From: Yazen Ghannam To: linux-edac@vger.kernel.org Cc: linux-kernel@vger.kernel.org, bp@alien8.de, mchehab@kernel.org, tony.luck@intel.com, Smita.KoralahalliChannabasappa@amd.com, Yazen Ghannam Subject: [PATCH v2 07/31] EDAC/amd64: Define functions for DramOffset Date: Wed, 23 Jun 2021 19:19:38 +0000 Message-Id: <20210623192002.3671647-8-yazen.ghannam@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210623192002.3671647-1-yazen.ghannam@amd.com> References: <20210623192002.3671647-1-yazen.ghannam@amd.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [165.204.184.1] X-ClientProxiedBy: BLAPR03CA0107.namprd03.prod.outlook.com (2603:10b6:208:32a::22) To BN8PR12MB3108.namprd12.prod.outlook.com (2603:10b6:408:40::20) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from yaz-ethanolx.amd.com (165.204.184.1) by BLAPR03CA0107.namprd03.prod.outlook.com (2603:10b6:208:32a::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4242.19 via Frontend Transport; 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The helper functions will be expanded in future DF versions. Rename the "base" variable to "map_num" to indicate that this is the address map number. An address map is defined with a base and limit value. The map_num variable is used to select the proper base and limit registers to use for the address translation. Signed-off-by: Yazen Ghannam --- Link: https://lkml.kernel.org/r/20210507190140.18854-4-Yazen.Ghannam@amd.com v1->v2: * Moved from arch/x86 to EDAC. * Add function to data_fabric_ops. drivers/edac/amd64_edac.c | 57 +++++++++++++++++++++++++++++---------- 1 file changed, 43 insertions(+), 14 deletions(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index f769353ef7e4..389f0621e885 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -1079,16 +1079,26 @@ static struct df_reg df_regs[] = { [SYS_FAB_ID_MASK] = {1, 0x208}, }; +/* Use "reg_" prefix for raw register values. */ struct addr_ctx { u64 ret_addr; + u32 reg_dram_offset; u16 nid; u8 inst_id; + u8 map_num; }; struct data_fabric_ops { + u64 (*get_hi_addr_offset)(struct addr_ctx *ctx); }; +static u64 get_hi_addr_offset_df2(struct addr_ctx *ctx) +{ + return (ctx->reg_dram_offset & GENMASK_ULL(31, 20)) << 8; +} + struct data_fabric_ops df2_ops = { + .get_hi_addr_offset = &get_hi_addr_offset_df2, }; struct data_fabric_ops *df_ops; @@ -1100,6 +1110,35 @@ static int set_df_ops(struct addr_ctx *ctx) return 0; } +static int get_dram_offset_reg(struct addr_ctx *ctx) +{ + if (amd_df_indirect_read(ctx->nid, df_regs[DRAM_OFFSET], + ctx->inst_id, &ctx->reg_dram_offset)) + return -EINVAL; + + return 0; +} + +static int remove_dram_offset(struct addr_ctx *ctx) +{ + if (get_dram_offset_reg(ctx)) + return -EINVAL; + + ctx->map_num = 0; + + /* Remove HiAddrOffset from normalized address, if enabled: */ + if (ctx->reg_dram_offset & BIT(0)) { + u64 hi_addr_offset = df_ops->get_hi_addr_offset(ctx); + + if (ctx->ret_addr >= hi_addr_offset) { + ctx->ret_addr -= hi_addr_offset; + ctx->map_num = 1; + } + } + + return 0; +} + static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) { u64 dram_base_addr, dram_limit_addr, dram_hole_base; @@ -1109,7 +1148,7 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr u8 intlv_num_dies, intlv_num_chan, intlv_num_sockets; u8 intlv_addr_sel, intlv_addr_bit; u8 num_intlv_bits, hashed_bit; - u8 lgcy_mmio_hole_en, base = 0; + u8 lgcy_mmio_hole_en; u8 cs_mask, cs_id = 0; bool hash_enabled = false; @@ -1128,21 +1167,11 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr if (set_df_ops(&ctx)) return -EINVAL; - if (amd_df_indirect_read(nid, df_regs[DRAM_OFFSET], umc, &tmp)) + if (remove_dram_offset(&ctx)) goto out_err; - /* Remove HiAddrOffset from normalized address, if enabled: */ - if (tmp & BIT(0)) { - u64 hi_addr_offset = (tmp & GENMASK_ULL(31, 20)) << 8; - - if (norm_addr >= hi_addr_offset) { - ctx.ret_addr -= hi_addr_offset; - base = 1; - } - } - reg = df_regs[DRAM_BASE_ADDR]; - reg.offset += base * 8; + reg.offset += ctx.map_num * 8; if (amd_df_indirect_read(nid, reg, umc, &tmp)) goto out_err; @@ -1166,7 +1195,7 @@ static int umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr } reg = df_regs[DRAM_LIMIT_ADDR]; - reg.offset += base * 8; + reg.offset += ctx.map_num * 8; if (amd_df_indirect_read(nid, reg, umc, &tmp)) goto out_err; -- 2.25.1