drm/i915: include GTT page-size info in error state

It might prove useful in the future to know if the vma is utilising
huge-GTT-pages. Related to this is the GTT cache, where there is some HW
"quirkiness" where it must be disabled if using 2M pages, so include
that for good measure.

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190909171646.22090-1-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
index 13b9dc0..a558edf 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object_types.h
@@ -160,7 +160,6 @@ struct drm_i915_gem_object {
                struct sg_table *pages;
                void *mapping;
 
-               /* TODO: whack some of this into the error state */
                struct i915_page_sizes {
                        /**
                         * The sg mask of the pages sg_table. i.e the mask of

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 3ccf7fd..6384a06 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -575,6 +575,9 @@ static void print_error_obj(struct drm_i915_error_state_buf *m,
                           lower_32_bits(obj->gtt_offset));
        }
 
+       if (obj->gtt_page_sizes > I915_GTT_PAGE_SIZE_4K)
+               err_printf(m, "gtt_page_sizes = 0x%08x\n", obj->gtt_page_sizes);
+
        err_compression_marker(m);
        for (page = 0; page < obj->page_count; page++) {
                int i, len;
@@ -735,6 +738,9 @@ static void __err_print_to_sgl(struct drm_i915_error_state_buf *m,
        if (IS_GEN(m->i915, 7))
                err_printf(m, "ERR_INT: 0x%08x\n", error->err_int);
 
+       if (IS_GEN_RANGE(m->i915, 8, 11))
+               err_printf(m, "GTT_CACHE_EN: 0x%08x\n", error->gtt_cache);
+
        for (ee = error->engine; ee; ee = ee->next)
                error_print_engine(m, ee, error->epoch);
 
@@ -985,6 +991,7 @@ i915_error_object_create(struct drm_i915_private *i915,
 
        dst->gtt_offset = vma->node.start;
        dst->gtt_size = vma->node.size;
+       dst->gtt_page_sizes = vma->page_sizes.gtt;
        dst->num_pages = num_pages;
        dst->page_count = 0;
        dst->unused = 0;
@@ -1554,6 +1561,9 @@ static void capture_reg_state(struct i915_gpu_state *error)
                error->gac_eco = intel_uncore_read(uncore, GAC_ECO_BITS);
        }
 
+       if (IS_GEN_RANGE(i915, 8, 11))
+               error->gtt_cache = intel_uncore_read(uncore, HSW_GTT_CACHE_EN);
+
        /* 4: Everything else */
        if (INTEL_GEN(i915) >= 11) {
                error->ier = intel_uncore_read(uncore, GEN8_DE_MISC_IER);

diff --git a/drivers/gpu/drm/i915/i915_gpu_error.h b/drivers/gpu/drm/i915/i915_gpu_error.h
index df9f577..63cf387 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gpu_error.h
+++ b/drivers/gpu/drm/i915/i915_gpu_error.h
@@ -74,6 +74,7 @@ struct i915_gpu_state {
        u32 gam_ecochk;
        u32 gab_ctl;
        u32 gfx_mode;
+       u32 gtt_cache;
 
        u32 nfence;
        u64 fence[I915_MAX_NUM_FENCES];
@@ -127,6 +128,7 @@ struct i915_gpu_state {
                struct drm_i915_error_object {
                        u64 gtt_offset;
                        u64 gtt_size;
+                       u32 gtt_page_sizes;
                        int num_pages;
                        int page_count;
                        int unused;