Transfer of GuC firmware requires few steps that currently
are implemented in two large functions. Split this code into
smaller functions to make these steps small and clear.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc_fw.c | 173 ++++++++++++++++++++++--------------
1 file changed, 106 insertions(+), 67 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc_fw.c b/drivers/gpu/drm/i915/intel_guc_fw.c
index ef67a36..2a10bcf 100644
--- a/drivers/gpu/drm/i915/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/intel_guc_fw.c
@@ -97,23 +97,53 @@ int intel_guc_fw_select(struct intel_guc *guc)
return 0;
}
-/*
- * Read the GuC status register (GUC_STATUS) and store it in the
- * specified location; then return a boolean indicating whether
- * the value matches either of two values representing completion
- * of the GuC boot process.
- *
- * This is used for polling the GuC status in a wait_for()
- * loop below.
- */
-static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
- u32 *status)
+static void guc_ucode_xfer_prepare(struct drm_i915_private *dev_priv)
{
- u32 val = I915_READ(GUC_STATUS);
- u32 uk_val = val & GS_UKERNEL_MASK;
- *status = val;
- return (uk_val == GS_UKERNEL_READY ||
- ((val & GS_MIA_CORE_STATE) && uk_val == GS_UKERNEL_LAPIC_DONE));
+ /* Enable MIA caching. GuC clock gating is disabled. */
+ I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
+
+ /* WaDisableMinuteIaClockGating:bxt */
+ if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {
+ I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) &
+ ~GUC_ENABLE_MIA_CLOCK_GATING));
+ }
+
+ /* WaC6DisallowByGfxPause:bxt */
+ if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0))
+ I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
+
+ if (IS_GEN9_LP(dev_priv))
+ I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
+ else
+ I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
+
+ if (IS_GEN9(dev_priv)) {
+ /* DOP Clock Gating Enable for GuC clocks */
+ I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
+ I915_READ(GEN7_MISCCPCTL)));
+
+ /* allows for 5us (in 10ns units) before GT can go to RC6 */
+ I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
+ }
+}
+
+/* Copy RSA signature from the fw image to HW for verification */
+static int guc_ucode_xfer_rsa(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
+{
+ struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ struct sg_table *sg = vma->pages;
+ u32 rsa[UOS_RSA_SCRATCH_MAX_COUNT];
+ int i;
+
+ if (sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa),
+ guc_fw->rsa_offset) != sizeof(rsa))
+ return -EINVAL;
+
+ for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++)
+ I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
+
+ return 0;
}
/*
@@ -122,29 +152,19 @@ static inline bool guc_ucode_response(struct drm_i915_private *dev_priv,
* 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.
- *
- * Note that GuC needs the CSS header plus uKernel code to be copied by the
- * DMA engine in one operation, whereas the RSA signature is loaded via MMIO.
*/
-static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
- struct i915_vma *vma)
+static int guc_ucode_xfer_dma(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
{
- struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
+ struct intel_guc *guc = container_of(guc_fw, struct intel_guc, fw);
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
unsigned long offset;
- struct sg_table *sg = vma->pages;
- u32 status, rsa[UOS_RSA_SCRATCH_MAX_COUNT];
- int i, ret = 0;
-
- /* where RSA signature starts */
- offset = guc_fw->rsa_offset;
-
- /* Copy RSA signature from the fw image to HW for verification */
- sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, sizeof(rsa), offset);
- for (i = 0; i < UOS_RSA_SCRATCH_MAX_COUNT; i++)
- I915_WRITE(UOS_RSA_SCRATCH(i), rsa[i]);
+ u32 status;
+ int ret;
- /* The header plus uCode will be copied to WOPCM via DMA, excluding any
- * other components */
+ /*
+ * 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 */
@@ -162,26 +182,55 @@ static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
/* 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;
+}
+
+/*
+ * Read the GuC status register (GUC_STATUS) and store it in the
+ * specified location; then return a boolean indicating whether
+ * the value matches either of two values representing completion
+ * of the GuC boot process.
+ *
+ * This is used for polling the GuC status in a wait_for()
+ * loop below.
+ */
+static inline bool guc_ucode_response(struct intel_guc *guc, u32 *status)
+{
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ u32 val = I915_READ(GUC_STATUS);
+ u32 uk_val = val & GS_UKERNEL_MASK;
+
+ *status = val;
+ return (uk_val == GS_UKERNEL_READY) ||
+ ((val & GS_MIA_CORE_STATE) && (uk_val == GS_UKERNEL_LAPIC_DONE));
+}
+
+static int guc_ucode_wait(struct intel_guc *guc)
+{
+ u32 status;
+ int ret;
+
/*
- * Wait for the DMA to complete & the GuC to start up.
+ * Wait for the GuC to start up.
* NB: Docs recommend not using the interrupt for completion.
* Measurements indicate this should take no more than 20ms, so a
* timeout here indicates that the GuC has failed and is unusable.
* (Higher levels of the driver will attempt to fall back to
* execlist mode if this happens.)
*/
- ret = wait_for(guc_ucode_response(dev_priv, &status), 100);
-
- DRM_DEBUG_DRIVER("DMA status 0x%x, GuC status 0x%x\n",
- I915_READ(DMA_CTRL), status);
+ ret = wait_for(guc_ucode_response(guc, &status), 100);
+ DRM_DEBUG_DRIVER("GuC status %#x\n", status);
if ((status & GS_BOOTROM_MASK) == GS_BOOTROM_RSA_FAILED) {
DRM_ERROR("GuC firmware signature verification failed\n");
ret = -ENOEXEC;
}
- DRM_DEBUG_DRIVER("returning %d\n", ret);
-
return ret;
}
@@ -198,34 +247,24 @@ static int guc_ucode_xfer(struct intel_uc_fw *guc_fw, struct i915_vma *vma)
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
- /* Enable MIA caching. GuC clock gating is disabled. */
- I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
-
- /* WaDisableMinuteIaClockGating:bxt */
- if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_A1)) {
- I915_WRITE(GUC_SHIM_CONTROL, (I915_READ(GUC_SHIM_CONTROL) &
- ~GUC_ENABLE_MIA_CLOCK_GATING));
- }
-
- /* WaC6DisallowByGfxPause:bxt */
- if (IS_BXT_REVID(dev_priv, 0, BXT_REVID_B0))
- I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
-
- if (IS_GEN9_LP(dev_priv))
- I915_WRITE(GEN9LP_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
- else
- I915_WRITE(GEN9_GT_PM_CONFIG, GT_DOORBELL_ENABLE);
+ guc_ucode_xfer_prepare(dev_priv);
- if (IS_GEN9(dev_priv)) {
- /* DOP Clock Gating Enable for GuC clocks */
- I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
- I915_READ(GEN7_MISCCPCTL)));
+ /*
+ * Note that GuC needs the CSS header plus uKernel code to be copied
+ * by the DMA engine in one operation, whereas the RSA signature is
+ * loaded via MMIO.
+ */
+ ret = guc_ucode_xfer_rsa(guc_fw, vma);
+ if (ret)
+ DRM_WARN("GuC firmware signature upload error %d\n", ret);
- /* allows for 5us (in 10ns units) before GT can go to RC6 */
- I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
- }
+ ret = guc_ucode_xfer_dma(guc_fw, vma);
+ if (ret)
+ DRM_WARN("GuC firmware upload error %d\n", ret);
- ret = guc_ucode_xfer_dma(dev_priv, vma);
+ ret = guc_ucode_wait(guc);
+ if (ret)
+ DRM_ERROR("GuC firmware error %d\n", ret);
intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
--
2.7.4
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