drm/i915/guc: Assert that all GGTT offsets used by the GuC are mappable

Add an assertion to the plain i915_ggtt_offset() to double check that
any offset we hand to the GuC is outside of its unmappable ranges.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161224193146.4402-1-chris@chris-wilson.co.uk
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index 3e20fe2..30e012b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -270,11 +270,11 @@ static void guc_ctx_desc_init(struct intel_guc *guc,
 
                /* The state page is after PPHWSP */
                lrc->ring_lcra =
-                       i915_ggtt_offset(ce->state) + LRC_STATE_PN * PAGE_SIZE;
+                       guc_ggtt_offset(ce->state) + LRC_STATE_PN * PAGE_SIZE;
                lrc->context_id = (client->ctx_index << GUC_ELC_CTXID_OFFSET) |
                                (guc_engine_id << GUC_ELC_ENGINE_OFFSET);
 
-               lrc->ring_begin = i915_ggtt_offset(ce->ring->vma);
+               lrc->ring_begin = guc_ggtt_offset(ce->ring->vma);
                lrc->ring_end = lrc->ring_begin + ce->ring->size - 1;
                lrc->ring_next_free_location = lrc->ring_begin;
                lrc->ring_current_tail_pointer_value = 0;
@@ -290,7 +290,7 @@ static void guc_ctx_desc_init(struct intel_guc *guc,
         * The doorbell, process descriptor, and workqueue are all parts
         * of the client object, which the GuC will reference via the GGTT
         */
-       gfx_addr = i915_ggtt_offset(client->vma);
+       gfx_addr = guc_ggtt_offset(client->vma);
        desc.db_trigger_phy = sg_dma_address(client->vma->pages->sgl) +
                                client->doorbell_offset;
        desc.db_trigger_cpu =
@@ -1226,7 +1226,7 @@ static void guc_log_create(struct intel_guc *guc)
                (GUC_LOG_ISR_PAGES << GUC_LOG_ISR_SHIFT) |
                (GUC_LOG_CRASH_PAGES << GUC_LOG_CRASH_SHIFT);
 
-       offset = i915_ggtt_offset(vma) >> PAGE_SHIFT; /* in pages */
+       offset = guc_ggtt_offset(vma) >> PAGE_SHIFT; /* in pages */
        guc->log.flags = (offset << GUC_LOG_BUF_ADDR_SHIFT) | flags;
 }
 
@@ -1329,7 +1329,7 @@ static void guc_addon_create(struct intel_guc *guc)
        guc_policies_init(policies);
 
        ads->scheduler_policies =
-               i915_ggtt_offset(vma) + sizeof(struct guc_ads);
+               guc_ggtt_offset(vma) + sizeof(struct guc_ads);
 
        /* MMIO reg state */
        reg_state = (void *)policies + sizeof(struct guc_policies);
@@ -1495,7 +1495,7 @@ int intel_guc_suspend(struct drm_i915_private *dev_priv)
        /* any value greater than GUC_POWER_D0 */
        data[1] = GUC_POWER_D1;
        /* first page is shared data with GuC */
-       data[2] = i915_ggtt_offset(ctx->engine[RCS].state);
+       data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
 
        return intel_guc_send(guc, data, ARRAY_SIZE(data));
 }
@@ -1522,7 +1522,7 @@ int intel_guc_resume(struct drm_i915_private *dev_priv)
        data[0] = INTEL_GUC_ACTION_EXIT_S_STATE;
        data[1] = GUC_POWER_D0;
        /* first page is shared data with GuC */
-       data[2] = i915_ggtt_offset(ctx->engine[RCS].state);
+       data[2] = guc_ggtt_offset(ctx->engine[RCS].state);
 
        return intel_guc_send(guc, data, ARRAY_SIZE(data));
 }

diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
index 21db697..35d5690 100644 (file)
--- a/drivers/gpu/drm/i915/intel_guc_loader.c
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -220,14 +220,14 @@ static void guc_params_init(struct drm_i915_private *dev_priv)
                params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
 
        if (guc->ads_vma) {
-               u32 ads = i915_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
+               u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
                params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
                params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
        }
 
        /* If GuC submission is enabled, set up additional parameters here */
        if (i915.enable_guc_submission) {
-               u32 pgs = i915_ggtt_offset(dev_priv->guc.ctx_pool_vma);
+               u32 pgs = guc_ggtt_offset(dev_priv->guc.ctx_pool_vma);
                u32 ctx_in_16 = GUC_MAX_GPU_CONTEXTS / 16;
 
                pgs >>= PAGE_SHIFT;
@@ -297,7 +297,7 @@ static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv,
        I915_WRITE(DMA_COPY_SIZE, guc_fw->header_size + guc_fw->ucode_size);
 
        /* Set the source address for the new blob */
-       offset = i915_ggtt_offset(vma) + guc_fw->header_offset;
+       offset = guc_ggtt_offset(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);
 

diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
index 11f5608..d556215 100644 (file)
--- a/drivers/gpu/drm/i915/intel_uc.h
+++ b/drivers/gpu/drm/i915/intel_uc.h
@@ -28,6 +28,8 @@
 #include "i915_guc_reg.h"
 #include "intel_ringbuffer.h"
 
+#include "i915_vma.h"
+
 struct drm_i915_gem_request;
 
 /*
@@ -198,4 +200,11 @@ void i915_guc_register(struct drm_i915_private *dev_priv);
 void i915_guc_unregister(struct drm_i915_private *dev_priv);
 int i915_guc_log_control(struct drm_i915_private *dev_priv, u64 control_val);
 
+static inline u32 guc_ggtt_offset(struct i915_vma *vma)
+{
+       u32 offset = i915_ggtt_offset(vma);
+       GEM_BUG_ON(offset < GUC_WOPCM_TOP);
+       return offset;
+}
+
 #endif