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Wed, 20 Sep 2023 12:28:33 -0700 (PDT) Received: from localhost ([178.176.83.40]) by smtp.gmail.com with ESMTPSA id x18-20020a2e9c92000000b002b6cb25e3f1sm3065569lji.108.2023.09.20.12.28.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Sep 2023 12:28:32 -0700 (PDT) From: Serge Semin To: Michal Simek , Alexander Stein , Borislav Petkov , Tony Luck , James Morse , Mauro Carvalho Chehab , Robert Richter Cc: Serge Semin , Punnaiah Choudary Kalluri , Dinh Nguyen , Arnd Bergmann , Greg Kroah-Hartman , linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 05/18] EDAC/synopsys: Add DDRC basic parameters infrastructure Date: Wed, 20 Sep 2023 22:26:50 +0300 Message-ID: <20230920192806.29960-6-fancer.lancer@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230920192806.29960-1-fancer.lancer@gmail.com> References: <20230920192806.29960-1-fancer.lancer@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230920_122835_048975_F37352D0 X-CRM114-Status: GOOD ( 30.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently the driver supports a single DW uMCTL2 DDRC IP-core: 64-bit DQ bus, ECC SEC/DED with always on Scrub (HW-src scrub). This makes the driver application being very limited. In addition to that lacking of any controller capabilities/parameters infrastructure makes it harder to add optional features support. Let's overcome all of that by adding a simple DW uMCTL2 DDRC IP-core parameters infrastructure. It's made of the snps_ddrc_info structure and a new method snps_get_ddrc_info() introduced to fill the structure fields in. The structure contains the IP-core parameters needed to create a more comprehensive driver and will be used in the driver to activate/de-activate various features: - ECC Mode: SEC/DED or Advanced X4/X8 ECC features. (Currently SEC/DED is only supported.) - SDRAM mode: (LP)DDR[2-4] memory interfaces. (Required for the HIF/SDRAM address translation.) - Memory Device config: Memory chips detected on the platform. (Applicable for DDR4 setups only.) - DQ-bus width: Maximal DQ-bus width utilized by the device. (Required for the Application/HIF address translation.) - DQ-bus mode: Actual DQ-bus width used to access the memory devices. (Required for the HIF/SDRAM address translation and ECC grain calc.) - HIF/SDRAM burst length. (Required for the Scrubber bandwidth calculation.) - HIF/SDRAM frequency ratio. (Required for the SDRAM bandwidth calculation.) - SDRAM ranks number. (Required for the Application/HIF address translation.) The list can be easily updated should any additional features support is required to be added in future, but at this stage the driver is fixed in a few places to have the new infrastructure utilized: SDRAM column address mapper, MCI csrows initialization. Note getting all of these parameters in a single method is very suitable from two perspectives. First it localizes the IP-core parameters detection thus improving the code readability and maintainability. Second it's very suitable for the platform-specific quirks implementation. Since some of the IP-core parameters can't be auto-detected at run-time, they will be able to be fixed right in the parameters getter by means of the platform quirks. Signed-off-by: Serge Semin --- drivers/edac/synopsys_edac.c | 268 +++++++++++++++++++++++++++-------- 1 file changed, 211 insertions(+), 57 deletions(-) diff --git a/drivers/edac/synopsys_edac.c b/drivers/edac/synopsys_edac.c index e177a36646c0..b830e4b4292d 100644 --- a/drivers/edac/synopsys_edac.c +++ b/drivers/edac/synopsys_edac.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -87,6 +88,11 @@ /* DDR Software Control Register */ #define DDR_SWCTL 0x320 +/* ECC Poison Pattern Registers */ +#define ECC_POISONPAT0_OFST 0x37C +#define ECC_POISONPAT1_OFST 0x380 +#define ECC_POISONPAT2_OFST 0x384 + /* ZynqMP DDR QOS Registers */ #define ZYNQMP_DDR_QOS_IRQ_STAT_OFST 0x20200 #define ZYNQMP_DDR_QOS_IRQ_EN_OFST 0x20208 @@ -98,10 +104,10 @@ #define DDR_MSTR_DEV_X8 1 #define DDR_MSTR_DEV_X16 2 #define DDR_MSTR_DEV_X32 3 +#define DDR_MSTR_ACT_RANKS_MASK GENMASK(27, 24) +#define DDR_MSTR_FREQ_RATIO11 BIT(22) +#define DDR_MSTR_BURST_RDWR GENMASK(19, 16) #define DDR_MSTR_BUSWIDTH_MASK GENMASK(13, 12) -#define DDR_MSTR_BUSWIDTH_16 2 -#define DDR_MSTR_BUSWIDTH_32 1 -#define DDR_MSTR_BUSWIDTH_64 0 #define DDR_MSTR_MEM_MASK GENMASK(5, 0) #define DDR_MSTR_MEM_LPDDR4 BIT(5) #define DDR_MSTR_MEM_DDR4 BIT(4) @@ -113,7 +119,6 @@ /* ECC CFG0 register definitions */ #define ECC_CFG0_MODE_MASK GENMASK(2, 0) -#define ECC_CFG0_MODE_SECDED 0x4 /* ECC status register definitions */ #define ECC_STAT_UE_MASK GENMASK(23, 16) @@ -208,6 +213,91 @@ #define ZYNQMP_DDR_QOS_CE_MASK BIT(1) #define ZYNQMP_DDR_QOS_IRQ_MASK (ZYNQMP_DDR_QOS_UE_MASK | ZYNQMP_DDR_QOS_CE_MASK) +/** + * enum snps_dq_width - SDRAM DQ bus width (ECC capable). + * SNPS_DQ_32: 32-bit memory data width. + * SNPS_DQ_64: 64-bit memory data width. + */ +enum snps_dq_width { + SNPS_DQ_32 = 2, + SNPS_DQ_64 = 3, +}; + +/** + * enum snps_dq_mode - SDRAM DQ bus mode. + * @SNPS_DQ_FULL: Full DQ bus width. + * @SNPS_DQ_HALF: Half DQ bus width. + * @SNPS_DQ_QRTR: Quarter DQ bus width. + */ +enum snps_dq_mode { + SNPS_DQ_FULL = 0, + SNPS_DQ_HALF = 1, + SNPS_DQ_QRTR = 2, +}; + +/** + * enum snps_burst_length - HIF/SDRAM burst transactions length. + * @SNPS_DDR_BL2: Burst length 2xSDRAM-words. + * @SNPS_DDR_BL4: Burst length 4xSDRAM-words. + * @SNPS_DDR_BL8: Burst length 8xSDRAM-words. + * @SNPS_DDR_BL16: Burst length 16xSDRAM-words. + */ +enum snps_burst_length { + SNPS_DDR_BL2 = 2, + SNPS_DDR_BL4 = 4, + SNPS_DDR_BL8 = 8, + SNPS_DDR_BL16 = 16, +}; + +/** + * enum snps_freq_ratio - HIF:SDRAM frequency ratio mode. + * @SNPS_FREQ_RATIO11: 1:1 frequency mode. + * @SNPS_FREQ_RATIO12: 1:2 frequency mode. + */ +enum snps_freq_ratio { + SNPS_FREQ_RATIO11 = 1, + SNPS_FREQ_RATIO12 = 2, +}; + +/** + * enum snps_ecc_mode - ECC mode. + * @SNPS_ECC_DISABLED: ECC is disabled/unavailable. + * @SNPS_ECC_SECDED: SEC/DED over 1 beat ECC (SideBand/Inline). + * @SNPS_ECC_ADVX4X8: Advanced ECC X4/X8 (SideBand). + */ +enum snps_ecc_mode { + SNPS_ECC_DISABLED = 0, + SNPS_ECC_SECDED = 4, + SNPS_ECC_ADVX4X8 = 5, +}; + +/** + * struct snps_ddrc_info - DDR controller platform parameters. + * @caps: DDR controller capabilities. + * @sdram_mode: Current SDRAM mode selected. + * @dev_cfg: Current memory device config (if applicable). + * @dq_width: Memory data bus width (width of the DQ signals + * connected to SDRAM chips). + * @dq_mode: Proportion of the DQ bus utilized to access SDRAM. + * @sdram_burst_len: SDRAM burst transaction length. + * @hif_burst_len: HIF burst transaction length (Host Interface). + * @freq_ratio: HIF/SDRAM frequency ratio mode. + * @ecc_mode: ECC mode enabled for the DDR controller (SEC/DED, etc). + * @ranks: Number of ranks enabled to access DIMM (1, 2 or 4). + */ +struct snps_ddrc_info { + unsigned int caps; + enum mem_type sdram_mode; + enum dev_type dev_cfg; + enum snps_dq_width dq_width; + enum snps_dq_mode dq_mode; + enum snps_burst_length sdram_burst_len; + enum snps_burst_length hif_burst_len; + enum snps_freq_ratio freq_ratio; + enum snps_ecc_mode ecc_mode; + unsigned int ranks; +}; + /** * struct snps_ecc_error_info - ECC error log information. * @row: Row number. @@ -242,6 +332,7 @@ struct snps_ecc_status { /** * struct snps_edac_priv - DDR memory controller private data. + * @info: DDR controller config info. * @pdev: Platform device. * @baseaddr: Base address of the DDR controller. * @reglock: Concurrent CSRs access lock. @@ -256,6 +347,7 @@ struct snps_ecc_status { * @rank_shift: Bit shifts for rank bit. */ struct snps_edac_priv { + struct snps_ddrc_info info; struct platform_device *pdev; void __iomem *baseaddr; spinlock_t reglock; @@ -495,23 +587,19 @@ static struct snps_edac_priv *snps_create_data(struct platform_device *pdev) /** * snps_get_dtype - Return the controller memory width. - * @base: DDR memory controller base address. + * @mstr: Master CSR value. * * Get the EDAC device type width appropriate for the current controller * configuration. * * Return: a device type width enumeration. */ -static enum dev_type snps_get_dtype(const void __iomem *base) +static inline enum dev_type snps_get_dtype(u32 mstr) { - u32 regval; - - regval = readl(base + DDR_MSTR_OFST); - if (!(regval & DDR_MSTR_MEM_DDR4)) + if (!(mstr & DDR_MSTR_MEM_DDR4)) return DEV_UNKNOWN; - regval = FIELD_GET(DDR_MSTR_DEV_CFG_MASK, regval); - switch (regval) { + switch (FIELD_GET(DDR_MSTR_DEV_CFG_MASK, mstr)) { case DDR_MSTR_DEV_X4: return DEV_X4; case DDR_MSTR_DEV_X8: @@ -525,24 +613,6 @@ static enum dev_type snps_get_dtype(const void __iomem *base) return DEV_UNKNOWN; } -/** - * snps_get_ecc_state - Return the controller ECC enable/disable status. - * @base: DDR memory controller base address. - * - * Get the ECC enable/disable status for the controller. - * - * Return: a ECC status boolean i.e true/false - enabled/disabled. - */ -static bool snps_get_ecc_state(void __iomem *base) -{ - u32 regval; - - regval = readl(base + ECC_CFG0_OFST); - regval = FIELD_GET(ECC_CFG0_MODE_MASK, regval); - - return (regval == ECC_CFG0_MODE_SECDED); -} - /** * snps_get_memsize - Read the size of the attached memory device. * @@ -559,21 +629,16 @@ static u32 snps_get_memsize(void) /** * snps_get_mtype - Returns controller memory type. - * @base: Synopsys ECC status structure. + * @mstr: Master CSR value. * * Get the EDAC memory type appropriate for the current controller * configuration. * * Return: a memory type enumeration. */ -static enum mem_type snps_get_mtype(const void __iomem *base) +static inline enum mem_type snps_get_mtype(u32 mstr) { - u32 regval; - - regval = readl(base + DDR_MSTR_OFST); - regval = FIELD_GET(DDR_MSTR_MEM_MASK, regval); - - switch (regval) { + switch (FIELD_GET(DDR_MSTR_MEM_MASK, mstr)) { case DDR_MSTR_MEM_DDR2: return MEM_DDR2; case DDR_MSTR_MEM_DDR3: @@ -593,6 +658,69 @@ static enum mem_type snps_get_mtype(const void __iomem *base) return MEM_RESERVED; } +/** + * snps_get_ddrc_info - Get the DDR controller config data. + * @priv: DDR memory controller private data. + * + * Return: negative errno if no ECC detected, otherwise - zero. + */ +static int snps_get_ddrc_info(struct snps_edac_priv *priv) +{ + int (*init_plat)(struct snps_edac_priv *priv); + u32 regval; + + /* Before getting the DDRC parameters make sure ECC is enabled */ + regval = readl(priv->baseaddr + ECC_CFG0_OFST); + + priv->info.ecc_mode = FIELD_GET(ECC_CFG0_MODE_MASK, regval); + if (priv->info.ecc_mode != SNPS_ECC_SECDED) { + edac_printk(KERN_INFO, EDAC_MC, "SEC/DED ECC not enabled\n"); + return -ENXIO; + } + + /* Auto-detect the basic HIF/SDRAM bus parameters */ + regval = readl(priv->baseaddr + DDR_MSTR_OFST); + + priv->info.sdram_mode = snps_get_mtype(regval); + priv->info.dev_cfg = snps_get_dtype(regval); + + priv->info.dq_mode = FIELD_GET(DDR_MSTR_BUSWIDTH_MASK, regval); + + /* + * Assume HIF burst length matches the SDRAM burst length since it's + * not auto-detectable + */ + priv->info.sdram_burst_len = FIELD_GET(DDR_MSTR_BURST_RDWR, regval) << 1; + priv->info.hif_burst_len = priv->info.sdram_burst_len; + + /* Retrieve the current HIF/SDRAM frequency ratio: 1:1 vs 1:2 */ + priv->info.freq_ratio = !(regval & DDR_MSTR_FREQ_RATIO11) + 1; + + /* Activated ranks field: set bit corresponds to populated rank */ + priv->info.ranks = FIELD_GET(DDR_MSTR_ACT_RANKS_MASK, regval); + priv->info.ranks = hweight_long(priv->info.ranks); + + /* Auto-detect the DQ bus width by using the ECC-poison pattern CSR */ + writel(0, priv->baseaddr + DDR_SWCTL); + + /* + * If poison pattern [32:64] is changeable then DQ is 64-bit wide. + * Note the feature has been available since IP-core v2.51a. + */ + regval = readl(priv->baseaddr + ECC_POISONPAT1_OFST); + writel(~regval, priv->baseaddr + ECC_POISONPAT1_OFST); + if (regval != readl(priv->baseaddr + ECC_POISONPAT1_OFST)) { + priv->info.dq_width = SNPS_DQ_64; + writel(regval, priv->baseaddr + ECC_POISONPAT1_OFST); + } else { + priv->info.dq_width = SNPS_DQ_32; + } + + writel(1, priv->baseaddr + DDR_SWCTL); + + return 0; +} + /** * snps_init_csrows - Initialize the csrow data. * @mci: EDAC memory controller instance. @@ -615,10 +743,10 @@ static void snps_init_csrows(struct mem_ctl_info *mci) for (j = 0; j < csi->nr_channels; j++) { dimm = csi->channels[j]->dimm; dimm->edac_mode = EDAC_SECDED; - dimm->mtype = snps_get_mtype(priv->baseaddr); + dimm->mtype = priv->info.sdram_mode; dimm->nr_pages = (size >> PAGE_SHIFT) / csi->nr_channels; dimm->grain = SNPS_EDAC_ERR_GRAIN; - dimm->dtype = snps_get_dtype(priv->baseaddr); + dimm->dtype = priv->info.dev_cfg; } } } @@ -732,6 +860,33 @@ static int snps_setup_irq(struct mem_ctl_info *mci) #define SNPS_DBGFS_BUF_LEN 128 +static int snps_ddrc_info_show(struct seq_file *s, void *data) +{ + struct mem_ctl_info *mci = s->private; + struct snps_edac_priv *priv = mci->pvt_info; + + seq_printf(s, "SDRAM: %s\n", edac_mem_types[priv->info.sdram_mode]); + + seq_printf(s, "DQ bus: %u/%s\n", (BITS_PER_BYTE << priv->info.dq_width), + priv->info.dq_mode == SNPS_DQ_FULL ? "Full" : + priv->info.dq_mode == SNPS_DQ_HALF ? "Half" : + priv->info.dq_mode == SNPS_DQ_QRTR ? "Quarter" : + "Unknown"); + seq_printf(s, "Burst: SDRAM %u HIF %u\n", priv->info.sdram_burst_len, + priv->info.hif_burst_len); + + seq_printf(s, "Ranks: %u\n", priv->info.ranks); + + seq_printf(s, "ECC: %s\n", + priv->info.ecc_mode == SNPS_ECC_SECDED ? "SEC/DED" : + priv->info.ecc_mode == SNPS_ECC_ADVX4X8 ? "Advanced X4/X8" : + "Unknown"); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(snps_ddrc_info); + /** * snps_data_poison_setup - Update poison registers. * @priv: DDR memory controller private instance data. @@ -853,12 +1008,8 @@ static void snps_setup_row_address_map(struct snps_edac_priv *priv, u32 *addrmap static void snps_setup_column_address_map(struct snps_edac_priv *priv, u32 *addrmap) { - u32 width, memtype; int index; - memtype = readl(priv->baseaddr + DDR_MSTR_OFST); - width = FIELD_GET(DDR_MSTR_BUSWIDTH_MASK, memtype); - priv->col_shift[0] = 0; priv->col_shift[1] = 1; priv->col_shift[2] = (addrmap[2] & COL_MAX_VAL_MASK) + COL_B2_BASE; @@ -882,8 +1033,8 @@ static void snps_setup_column_address_map(struct snps_edac_priv *priv, u32 *addr priv->col_shift[9] = (((addrmap[3] >> 24) & COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 24) & COL_MAX_VAL_MASK) + COL_B9_BASE); - if (width == DDR_MSTR_BUSWIDTH_64) { - if (memtype & DDR_MSTR_MEM_LPDDR3) { + if (priv->info.dq_mode == SNPS_DQ_FULL) { + if (priv->info.sdram_mode == MEM_LPDDR3) { priv->col_shift[10] = ((addrmap[4] & COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 : ((addrmap[4] & COL_MAX_VAL_MASK) + @@ -902,8 +1053,8 @@ static void snps_setup_column_address_map(struct snps_edac_priv *priv, u32 *addr (((addrmap[4] >> 8) & COL_MAX_VAL_MASK) + COL_B11_BASE); } - } else if (width == DDR_MSTR_BUSWIDTH_32) { - if (memtype & DDR_MSTR_MEM_LPDDR3) { + } else if (priv->info.dq_mode == SNPS_DQ_HALF) { + if (priv->info.sdram_mode == MEM_LPDDR3) { priv->col_shift[10] = (((addrmap[3] >> 24) & COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 24) & COL_MAX_VAL_MASK) + @@ -923,7 +1074,7 @@ static void snps_setup_column_address_map(struct snps_edac_priv *priv, u32 *addr COL_B10_BASE); } } else { - if (memtype & DDR_MSTR_MEM_LPDDR3) { + if (priv->info.sdram_mode == MEM_LPDDR3) { priv->col_shift[10] = (((addrmap[3] >> 16) & COL_MAX_VAL_MASK) == COL_MAX_VAL_MASK) ? 0 : (((addrmap[3] >> 16) & COL_MAX_VAL_MASK) + @@ -944,10 +1095,11 @@ static void snps_setup_column_address_map(struct snps_edac_priv *priv, u32 *addr } } - if (width) { - for (index = 9; index > width; index--) { - priv->col_shift[index] = priv->col_shift[index - width]; - priv->col_shift[index - width] = 0; + if (priv->info.dq_mode) { + for (index = 9; index > priv->info.dq_mode; index--) { + priv->col_shift[index] = + priv->col_shift[index - priv->info.dq_mode]; + priv->col_shift[index - priv->info.dq_mode] = 0; } } @@ -1109,6 +1261,9 @@ static void snps_create_debugfs_nodes(struct mem_ctl_info *mci) snps_setup_address_map(priv); + edac_debugfs_create_file("ddrc_info", 0400, mci->debugfs, mci, + &snps_ddrc_info_fops); + edac_debugfs_create_file("inject_data_error", 0600, mci->debugfs, mci, &snps_inject_data_error); @@ -1141,10 +1296,9 @@ static int snps_mc_probe(struct platform_device *pdev) if (IS_ERR(priv)) return PTR_ERR(priv); - if (!snps_get_ecc_state(baseaddr)) { - edac_printk(KERN_INFO, EDAC_MC, "ECC not enabled\n"); - return -ENXIO; - } + rc = snps_get_ddrc_info(priv); + if (rc) + return rc; mci = snps_mc_create(priv); if (IS_ERR(mci))