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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>
This commit is contained in:
Eric Anholt 2008-11-05 12:37:42 -08:00 committed by Dave Airlie
parent a9d51a5ad1
commit a9587470f7
1 changed files with 34 additions and 0 deletions
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34
drivers/gpu/drm/i915/i915_gem_proc.c
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@ -250,6 +250,39 @@ static int i915_interrupt_info(char *buf, char **start, off_t offset,
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 @@ static struct drm_proc_list {
{"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)