drm/i915: Add /proc debugging entry for reading out the HWS.
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/i915/i915_gem_proc.c b/drivers/gpu/drm/i915/i915_gem_proc.c
index e8d5abe..4d1b9de 100644
--- a/drivers/gpu/drm/i915/i915_gem_proc.c
+++ b/drivers/gpu/drm/i915/i915_gem_proc.c
@@ -250,6 +250,39 @@
return len - offset;
}
+static int i915_hws_info(char *buf, char **start, off_t offset,
+ int request, int *eof, void *data)
+{
+ struct drm_minor *minor = (struct drm_minor *) data;
+ struct drm_device *dev = minor->dev;
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ int len = 0, i;
+ volatile u32 *hws;
+
+ if (offset > DRM_PROC_LIMIT) {
+ *eof = 1;
+ return 0;
+ }
+
+ hws = (volatile u32 *)dev_priv->hw_status_page;
+ if (hws == NULL) {
+ *eof = 1;
+ return 0;
+ }
+
+ *start = &buf[offset];
+ *eof = 0;
+ for (i = 0; i < 4096 / sizeof(u32) / 4; i += 4) {
+ DRM_PROC_PRINT("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
+ i * 4,
+ hws[i], hws[i + 1], hws[i + 2], hws[i + 3]);
+ }
+ if (len > request + offset)
+ return request;
+ *eof = 1;
+ return len - offset;
+}
+
static struct drm_proc_list {
/** file name */
const char *name;
@@ -262,6 +295,7 @@
{"i915_gem_request", i915_gem_request_info},
{"i915_gem_seqno", i915_gem_seqno_info},
{"i915_gem_interrupt", i915_interrupt_info},
+ {"i915_gem_hws", i915_hws_info},
};
#define I915_GEM_PROC_ENTRIES ARRAY_SIZE(i915_gem_proc_list)
