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Commit a9587470 authored by Eric Anholt's avatar Eric Anholt Committed by Dave Airlie
Browse files

drm/i915: Add /proc debugging entry for reading out the HWS. 



Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent a9d51a5a

drivers/gpu/drm/i915/i915_gem_proc.c

+34 −0
Original line number Diff line number Diff line
@@ -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)