drm/radeon: s/ioctl_wait_idle/mmio_hpd_flush/

And clean up the function comment a little.
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/r600.c

@@ -4088,16 +4088,15 @@ int r600_debugfs_mc_info_init(struct radeon_device *rdev)
 }
 
 /**
- * r600_ioctl_wait_idle - flush host path cache on wait idle ioctl
+ * r600_mmio_hdp_flush - flush Host Data Path cache via MMIO
  * rdev: radeon device structure
- * bo: buffer object struct which userspace is waiting for idle
  *
- * Some R6XX/R7XX doesn't seems to take into account HDP flush performed
- * through ring buffer, this leads to corruption in rendering, see
- * http://bugzilla.kernel.org/show_bug.cgi?id=15186 to avoid this we
- * directly perform HDP flush by writing register through MMIO.
+ * Some R6XX/R7XX don't seem to take into account HDP flushes performed
+ * through the ring buffer. This leads to corruption in rendering, see
+ * http://bugzilla.kernel.org/show_bug.cgi?id=15186 . To avoid this, we
+ * directly perform the HDP flush by writing the register through MMIO.
  */
-void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo)
+void r600_mmio_hdp_flush(struct radeon_device *rdev)
 {
 	/* r7xx hw bug.  write to HDP_DEBUG1 followed by fb read
 	 * rather than write to HDP_REG_COHERENCY_FLUSH_CNTL.

drivers/gpu/drm/radeon/radeon.h

@@ -1772,13 +1772,8 @@ struct radeon_asic {
 	int (*suspend)(struct radeon_device *rdev);
 	void (*vga_set_state)(struct radeon_device *rdev, bool state);
 	int (*asic_reset)(struct radeon_device *rdev);
-	/* ioctl hw specific callback. Some hw might want to perform special
-	 * operation on specific ioctl. For instance on wait idle some hw
-	 * might want to perform and HDP flush through MMIO as it seems that
-	 * some R6XX/R7XX hw doesn't take HDP flush into account if programmed
-	 * through ring.
-	 */
-	void (*ioctl_wait_idle)(struct radeon_device *rdev, struct radeon_bo *bo);
+	/* Flush the HDP cache via MMIO */
+	void (*mmio_hdp_flush)(struct radeon_device *rdev);
 	/* check if 3D engine is idle */
 	bool (*gui_idle)(struct radeon_device *rdev);
 	/* wait for mc_idle */

drivers/gpu/drm/radeon/radeon_asic.c

@@ -194,7 +194,7 @@ static struct radeon_asic r100_asic = {
 	.resume = &r100_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r100_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r100_mc_wait_for_idle,
 	.gart = {
@@ -260,7 +260,7 @@ static struct radeon_asic r200_asic = {
 	.resume = &r100_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r100_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r100_mc_wait_for_idle,
 	.gart = {
@@ -340,7 +340,7 @@ static struct radeon_asic r300_asic = {
 	.resume = &r300_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r300_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r300_mc_wait_for_idle,
 	.gart = {
@@ -406,7 +406,7 @@ static struct radeon_asic r300_asic_pcie = {
 	.resume = &r300_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r300_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r300_mc_wait_for_idle,
 	.gart = {
@@ -472,7 +472,7 @@ static struct radeon_asic r420_asic = {
 	.resume = &r420_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r300_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r300_mc_wait_for_idle,
 	.gart = {
@@ -538,7 +538,7 @@ static struct radeon_asic rs400_asic = {
 	.resume = &rs400_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &r300_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &rs400_mc_wait_for_idle,
 	.gart = {
@@ -604,7 +604,7 @@ static struct radeon_asic rs600_asic = {
 	.resume = &rs600_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &rs600_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &rs600_mc_wait_for_idle,
 	.gart = {
@@ -672,7 +672,7 @@ static struct radeon_asic rs690_asic = {
 	.resume = &rs690_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &rs600_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &rs690_mc_wait_for_idle,
 	.gart = {
@@ -740,7 +740,7 @@ static struct radeon_asic rv515_asic = {
 	.resume = &rv515_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &rs600_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &rv515_mc_wait_for_idle,
 	.gart = {
@@ -806,7 +806,7 @@ static struct radeon_asic r520_asic = {
 	.resume = &r520_resume,
 	.vga_set_state = &r100_vga_set_state,
 	.asic_reset = &rs600_asic_reset,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r100_gui_idle,
 	.mc_wait_for_idle = &r520_mc_wait_for_idle,
 	.gart = {
@@ -898,7 +898,7 @@ static struct radeon_asic r600_asic = {
 	.resume = &r600_resume,
 	.vga_set_state = &r600_vga_set_state,
 	.asic_reset = &r600_asic_reset,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &r600_mc_wait_for_idle,
 	.get_xclk = &r600_get_xclk,
@@ -970,7 +970,7 @@ static struct radeon_asic rv6xx_asic = {
 	.resume = &r600_resume,
 	.vga_set_state = &r600_vga_set_state,
 	.asic_reset = &r600_asic_reset,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &r600_mc_wait_for_idle,
 	.get_xclk = &r600_get_xclk,
@@ -1060,7 +1060,7 @@ static struct radeon_asic rs780_asic = {
 	.resume = &r600_resume,
 	.vga_set_state = &r600_vga_set_state,
 	.asic_reset = &r600_asic_reset,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &r600_mc_wait_for_idle,
 	.get_xclk = &r600_get_xclk,
@@ -1163,7 +1163,7 @@ static struct radeon_asic rv770_asic = {
 	.resume = &rv770_resume,
 	.asic_reset = &r600_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &r600_mc_wait_for_idle,
 	.get_xclk = &rv770_get_xclk,
@@ -1281,7 +1281,7 @@ static struct radeon_asic evergreen_asic = {
 	.resume = &evergreen_resume,
 	.asic_reset = &evergreen_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &rv770_get_xclk,
@@ -1373,7 +1373,7 @@ static struct radeon_asic sumo_asic = {
 	.resume = &evergreen_resume,
 	.asic_reset = &evergreen_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &r600_get_xclk,
@@ -1464,7 +1464,7 @@ static struct radeon_asic btc_asic = {
 	.resume = &evergreen_resume,
 	.asic_reset = &evergreen_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &rv770_get_xclk,
@@ -1599,7 +1599,7 @@ static struct radeon_asic cayman_asic = {
 	.resume = &cayman_resume,
 	.asic_reset = &cayman_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &rv770_get_xclk,
@@ -1699,7 +1699,7 @@ static struct radeon_asic trinity_asic = {
 	.resume = &cayman_resume,
 	.asic_reset = &cayman_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &r600_get_xclk,
@@ -1829,7 +1829,7 @@ static struct radeon_asic si_asic = {
 	.resume = &si_resume,
 	.asic_reset = &si_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = r600_ioctl_wait_idle,
+	.mmio_hdp_flush = r600_mmio_hdp_flush,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &si_get_xclk,
@@ -1987,7 +1987,7 @@ static struct radeon_asic ci_asic = {
 	.resume = &cik_resume,
 	.asic_reset = &cik_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &cik_get_xclk,
@@ -2091,7 +2091,7 @@ static struct radeon_asic kv_asic = {
 	.resume = &cik_resume,
 	.asic_reset = &cik_asic_reset,
 	.vga_set_state = &r600_vga_set_state,
-	.ioctl_wait_idle = NULL,
+	.mmio_hdp_flush = NULL,
 	.gui_idle = &r600_gui_idle,
 	.mc_wait_for_idle = &evergreen_mc_wait_for_idle,
 	.get_xclk = &cik_get_xclk,

drivers/gpu/drm/radeon/radeon_asic.h

@@ -351,7 +351,7 @@ void r600_hpd_fini(struct radeon_device *rdev);
 bool r600_hpd_sense(struct radeon_device *rdev, enum radeon_hpd_id hpd);
 void r600_hpd_set_polarity(struct radeon_device *rdev,
 			   enum radeon_hpd_id hpd);
-extern void r600_ioctl_wait_idle(struct radeon_device *rdev, struct radeon_bo *bo);
+extern void r600_mmio_hdp_flush(struct radeon_device *rdev);
 extern bool r600_gui_idle(struct radeon_device *rdev);
 extern void r600_pm_misc(struct radeon_device *rdev);
 extern void r600_pm_init_profile(struct radeon_device *rdev);

drivers/gpu/drm/radeon/radeon_gem.c

@@ -365,9 +365,9 @@ int radeon_gem_wait_idle_ioctl(struct drm_device *dev, void *data,
 	}
 	robj = gem_to_radeon_bo(gobj);
 	r = radeon_bo_wait(robj, NULL, false);
-	/* callback hw specific functions if any */
-	if (rdev->asic->ioctl_wait_idle)
-		robj->rdev->asic->ioctl_wait_idle(rdev, robj);
+	/* Flush HDP cache via MMIO if necessary */
+	if (rdev->asic->mmio_hdp_flush)
+		robj->rdev->asic->mmio_hdp_flush(rdev);
 	drm_gem_object_unreference_unlocked(gobj);
 	r = radeon_gem_handle_lockup(rdev, r);
 	return r;