From: Sk Anirban Date: Mon, 2 Feb 2026 10:53:15 +0000 (+0530) Subject: drm/xe/guc: Add Wa_14025883347 for GuC DMA failure on reset X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c57db41b8d2cd410e7219729f446aa17965485ad;p=thirdparty%2Flinux.git drm/xe/guc: Add Wa_14025883347 for GuC DMA failure on reset Prevent GuC firmware DMA failures during GuC-only reset by disabling idle flow and verifying SRAM handling completion. Without this, reset can be issued while SRAM handler is copying WOPCM to SRAM, causing GuC HW to get stuck. v2: Modify error message (Badal) Rename reg bit name (Daniele) Update WA skip condition (Daniele) Update SRAM handling logic (Daniele) v3: Reorder WA call (Badal) Wait for GuC ready status (Daniele) v4: Update reg name (Badal) Add comment (Daniele) Add extended graphics version (Daniele) Modify rules Signed-off-by: Sk Anirban Reviewed-by: Badal Nilawar Acked-by: Matt Roper Reviewed-by: Daniele Ceraolo Spurio Link: https://patch.msgid.link/20260202105313.3338094-4-sk.anirban@intel.com Signed-off-by: Matt Roper --- diff --git a/drivers/gpu/drm/xe/regs/xe_guc_regs.h b/drivers/gpu/drm/xe/regs/xe_guc_regs.h index 87984713dd126..5faac8316b66c 100644 --- a/drivers/gpu/drm/xe/regs/xe_guc_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_guc_regs.h @@ -40,6 +40,9 @@ #define GS_BOOTROM_JUMP_PASSED REG_FIELD_PREP(GS_BOOTROM_MASK, 0x76) #define GS_MIA_IN_RESET REG_BIT(0) +#define BOOT_HASH_CHK XE_REG(0xc010) +#define GUC_BOOT_UKERNEL_VALID REG_BIT(31) + #define GUC_HEADER_INFO XE_REG(0xc014) #define GUC_WOPCM_SIZE XE_REG(0xc050) @@ -83,7 +86,12 @@ #define GUC_WOPCM_OFFSET_MASK REG_GENMASK(31, GUC_WOPCM_OFFSET_SHIFT) #define HUC_LOADING_AGENT_GUC REG_BIT(1) #define GUC_WOPCM_OFFSET_VALID REG_BIT(0) + +#define GUC_SRAM_STATUS XE_REG(0xc398) +#define GUC_SRAM_HANDLING_MASK REG_GENMASK(8, 7) + #define GUC_MAX_IDLE_COUNT XE_REG(0xc3e4) +#define GUC_IDLE_FLOW_DISABLE REG_BIT(31) #define GUC_PMTIMESTAMP_LO XE_REG(0xc3e8) #define GUC_PMTIMESTAMP_HI XE_REG(0xc3ec) diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c index 303f6ae7c4189..cbbb4d665b8fe 100644 --- a/drivers/gpu/drm/xe/xe_guc.c +++ b/drivers/gpu/drm/xe/xe_guc.c @@ -917,6 +917,41 @@ int xe_guc_post_load_init(struct xe_guc *guc) return xe_guc_submit_enable(guc); } +/* + * Wa_14025883347: Prevent GuC firmware DMA failures during GuC-only reset by ensuring + * SRAM save/restore operations are complete before reset. + */ +static void guc_prevent_fw_dma_failure_on_reset(struct xe_guc *guc) +{ + struct xe_gt *gt = guc_to_gt(guc); + u32 boot_hash_chk, guc_status, sram_status; + int ret; + + guc_status = xe_mmio_read32(>->mmio, GUC_STATUS); + if (guc_status & GS_MIA_IN_RESET) + return; + + boot_hash_chk = xe_mmio_read32(>->mmio, BOOT_HASH_CHK); + if (!(boot_hash_chk & GUC_BOOT_UKERNEL_VALID)) + return; + + /* Disable idle flow during reset (GuC reset re-enables it automatically) */ + xe_mmio_rmw32(>->mmio, GUC_MAX_IDLE_COUNT, 0, GUC_IDLE_FLOW_DISABLE); + + ret = xe_mmio_wait32(>->mmio, GUC_STATUS, GS_UKERNEL_MASK, + FIELD_PREP(GS_UKERNEL_MASK, XE_GUC_LOAD_STATUS_READY), + 100000, &guc_status, false); + if (ret) + xe_gt_warn(gt, "GuC not ready after disabling idle flow (GUC_STATUS: 0x%x)\n", + guc_status); + + ret = xe_mmio_wait32(>->mmio, GUC_SRAM_STATUS, GUC_SRAM_HANDLING_MASK, + 0, 5000, &sram_status, false); + if (ret) + xe_gt_warn(gt, "SRAM handling not complete (GUC_SRAM_STATUS: 0x%x)\n", + sram_status); +} + int xe_guc_reset(struct xe_guc *guc) { struct xe_gt *gt = guc_to_gt(guc); @@ -929,6 +964,9 @@ int xe_guc_reset(struct xe_guc *guc) if (IS_SRIOV_VF(gt_to_xe(gt))) return xe_gt_sriov_vf_bootstrap(gt); + if (XE_GT_WA(gt, 14025883347)) + guc_prevent_fw_dma_failure_on_reset(guc); + xe_mmio_write32(mmio, GDRST, GRDOM_GUC); ret = xe_mmio_wait32(mmio, GDRST, GRDOM_GUC, 0, 5000, &gdrst, false); diff --git a/drivers/gpu/drm/xe/xe_wa_oob.rules b/drivers/gpu/drm/xe/xe_wa_oob.rules index 5cd7fa6d2a5c0..ac08f94f90a14 100644 --- a/drivers/gpu/drm/xe/xe_wa_oob.rules +++ b/drivers/gpu/drm/xe/xe_wa_oob.rules @@ -73,3 +73,6 @@ 15015404425_disable PLATFORM(PANTHERLAKE), MEDIA_STEP(B0, FOREVER) 16026007364 MEDIA_VERSION(3000) 14020316580 MEDIA_VERSION(1301) + +14025883347 MEDIA_VERSION_RANGE(1301, 3503) + GRAPHICS_VERSION_RANGE(2004, 3005)