From: Chris Wilson Date: Thu, 18 Oct 2018 19:55:36 +0000 (+0100) Subject: drm/i915/guc: Propagate the fw xfer timeout X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=fbffc5a3b877adc0c5334f3f6ff628ffb7e70d5e;p=openwrt%2Fstaging%2Fblogic.git drm/i915/guc: Propagate the fw xfer timeout Propagate the timeout on transferring the fw back to the caller where it may act upon it, usually by restarting the xfer before failing. v2: Simplify the wait to only wait upon the guc signaling completion, with an assertion that the fw xfer must have completed for it to be ready! Testcase: igt/drv_selftest/live_hangcheck Signed-off-by: Chris Wilson Cc: Michal Wajdeczko Cc: Daniele Ceraolo Spurio Reviewed-by: Daniele Ceraolo Spurio Link: https://patchwork.freedesktop.org/patch/msgid/20181018195536.11522-1-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/intel_guc_fw.c b/drivers/gpu/drm/i915/intel_guc_fw.c index e722bbc1fa1d..ae8e103a2c4d 100644 --- a/drivers/gpu/drm/i915/intel_guc_fw.c +++ b/drivers/gpu/drm/i915/intel_guc_fw.c @@ -125,66 +125,26 @@ static void guc_prepare_xfer(struct intel_guc *guc) } /* Copy RSA signature from the fw image to HW for verification */ -static int guc_xfer_rsa(struct intel_guc *guc, struct i915_vma *vma) +static void guc_xfer_rsa(struct intel_guc *guc, struct i915_vma *vma) { struct drm_i915_private *dev_priv = guc_to_i915(guc); - struct intel_uc_fw *guc_fw = &guc->fw; - struct sg_table *sg = vma->pages; u32 rsa[UOS_RSA_SCRATCH_COUNT]; int i; - if (sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), - guc_fw->rsa_offset) != sizeof(rsa)) - return -EINVAL; + sg_pcopy_to_buffer(vma->pages->sgl, vma->pages->nents, + rsa, sizeof(rsa), guc->fw.rsa_offset); for (i = 0; i < UOS_RSA_SCRATCH_COUNT; i++) I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]); - - return 0; } -/* - * Transfer the firmware image to RAM for execution by the microcontroller. - * - * Architecturally, the DMA engine is bidirectional, and can potentially even - * transfer between GTT locations. This functionality is left out of the API - * for now as there is no need for it. - */ -static int guc_xfer_ucode(struct intel_guc *guc, struct i915_vma *vma) +static bool guc_xfer_completed(struct intel_guc *guc, u32 *status) { struct drm_i915_private *dev_priv = guc_to_i915(guc); - struct intel_uc_fw *guc_fw = &guc->fw; - unsigned long offset; - u32 status; - int ret; - - /* - * The header plus uCode will be copied to WOPCM via DMA, excluding any - * other components - */ - I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size); - - /* Set the source address for the new blob */ - offset = intel_guc_ggtt_offset(guc, vma) + guc_fw->header_offset; - I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset)); - I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF); - /* - * Set the DMA destination. Current uCode expects the code to be - * loaded at 8k; locations below this are used for the stack. - */ - I915_WRITE(DMA_ADDR_1_LOW, 0x2000); - I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM); - - /* Finally start the DMA */ - I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA)); - - /* Wait for DMA to finish */ - ret = __intel_wait_for_register_fw(dev_priv, DMA_CTRL, START_DMA, 0, - 2, 100, &status); - DRM_DEBUG_DRIVER("GuC DMA status %#x\n", status); - - return ret; + /* Did we complete the xfer? */ + *status = I915_READ(DMA_CTRL); + return !(*status & START_DMA); } /* @@ -228,9 +188,51 @@ static int guc_wait_ucode(struct intel_guc *guc) ret = -ENOEXEC; } + if (ret == 0 && !guc_xfer_completed(guc, &status)) { + DRM_ERROR("GuC is ready, but the xfer %08x is incomplete\n", + status); + ret = -ENXIO; + } + return ret; } +/* + * Transfer the firmware image to RAM for execution by the microcontroller. + * + * Architecturally, the DMA engine is bidirectional, and can potentially even + * transfer between GTT locations. This functionality is left out of the API + * for now as there is no need for it. + */ +static int guc_xfer_ucode(struct intel_guc *guc, struct i915_vma *vma) +{ + struct drm_i915_private *dev_priv = guc_to_i915(guc); + struct intel_uc_fw *guc_fw = &guc->fw; + unsigned long offset; + + /* + * The header plus uCode will be copied to WOPCM via DMA, excluding any + * other components + */ + I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size); + + /* Set the source address for the new blob */ + offset = intel_guc_ggtt_offset(guc, vma) + guc_fw->header_offset; + I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset)); + I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF); + + /* + * Set the DMA destination. Current uCode expects the code to be + * loaded at 8k; locations below this are used for the stack. + */ + I915_WRITE(DMA_ADDR_1_LOW, 0x2000); + I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM); + + /* Finally start the DMA */ + I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA)); + + return guc_wait_ucode(guc); +} /* * Load the GuC firmware blob into the MinuteIA. */ @@ -251,17 +253,9 @@ static int guc_fw_xfer(struct intel_uc_fw *guc_fw, struct i915_vma *vma) * by the DMA engine in one operation, whereas the RSA signature is * loaded via MMIO. */ - ret = guc_xfer_rsa(guc, vma); - if (ret) - DRM_WARN("GuC firmware signature xfer error %d\n", ret); + guc_xfer_rsa(guc, vma); ret = guc_xfer_ucode(guc, vma); - if (ret) - DRM_WARN("GuC firmware code xfer error %d\n", ret); - - ret = guc_wait_ucode(guc); - if (ret) - DRM_ERROR("GuC firmware xfer error %d\n", ret); intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);