1 files changed, 31 insertions, 33 deletions

diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
index c7b61f16ecfd..34603b3c80ab 100644
--- a/drivers/gpu/drm/radeon/si.c
+++ b/drivers/gpu/drm/radeon/si.c
@@ -1762,7 +1762,7 @@ void si_fence_ring_emit(struct radeon_device *rdev,
  */
 void si_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
 {
-	struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+	struct radeon_ring *ring = &rdev->ring[ib->ring];
 	u32 header;
 
 	if (ib->is_const_ib)
@@ -2702,7 +2702,7 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 			if (ib->is_const_ib)
 				ret = si_vm_packet3_ce_check(rdev, ib->ptr, &pkt);
 			else {
-				switch (ib->fence->ring) {
+				switch (ib->ring) {
 				case RADEON_RING_TYPE_GFX_INDEX:
 					ret = si_vm_packet3_gfx_check(rdev, ib->ptr, &pkt);
 					break;
@@ -2711,7 +2711,7 @@ int si_ib_parse(struct radeon_device *rdev, struct radeon_ib *ib)
 					ret = si_vm_packet3_compute_check(rdev, ib->ptr, &pkt);
 					break;
 				default:
-					dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->fence->ring);
+					dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->ring);
 					ret = -EINVAL;
 					break;
 				}
@@ -2942,7 +2942,6 @@ static void si_disable_interrupts(struct radeon_device *rdev)
 	WREG32(IH_RB_RPTR, 0);
 	WREG32(IH_RB_WPTR, 0);
 	rdev->ih.enabled = false;
-	rdev->ih.wptr = 0;
 	rdev->ih.rptr = 0;
 }
 
@@ -3093,45 +3092,45 @@ int si_irq_set(struct radeon_device *rdev)
 	hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~DC_HPDx_INT_EN;
 
 	/* enable CP interrupts on all rings */
-	if (rdev->irq.sw_int[RADEON_RING_TYPE_GFX_INDEX]) {
+	if (atomic_read(&rdev->irq.ring_int[RADEON_RING_TYPE_GFX_INDEX])) {
 		DRM_DEBUG("si_irq_set: sw int gfx\n");
 		cp_int_cntl |= TIME_STAMP_INT_ENABLE;
 	}
-	if (rdev->irq.sw_int[CAYMAN_RING_TYPE_CP1_INDEX]) {
+	if (atomic_read(&rdev->irq.ring_int[CAYMAN_RING_TYPE_CP1_INDEX])) {
 		DRM_DEBUG("si_irq_set: sw int cp1\n");
 		cp_int_cntl1 |= TIME_STAMP_INT_ENABLE;
 	}
-	if (rdev->irq.sw_int[CAYMAN_RING_TYPE_CP2_INDEX]) {
+	if (atomic_read(&rdev->irq.ring_int[CAYMAN_RING_TYPE_CP2_INDEX])) {
 		DRM_DEBUG("si_irq_set: sw int cp2\n");
 		cp_int_cntl2 |= TIME_STAMP_INT_ENABLE;
 	}
 	if (rdev->irq.crtc_vblank_int[0] ||
-	    rdev->irq.pflip[0]) {
+	    atomic_read(&rdev->irq.pflip[0])) {
 		DRM_DEBUG("si_irq_set: vblank 0\n");
 		crtc1 |= VBLANK_INT_MASK;
 	}
 	if (rdev->irq.crtc_vblank_int[1] ||
-	    rdev->irq.pflip[1]) {
+	    atomic_read(&rdev->irq.pflip[1])) {
 		DRM_DEBUG("si_irq_set: vblank 1\n");
 		crtc2 |= VBLANK_INT_MASK;
 	}
 	if (rdev->irq.crtc_vblank_int[2] ||
-	    rdev->irq.pflip[2]) {
+	    atomic_read(&rdev->irq.pflip[2])) {
 		DRM_DEBUG("si_irq_set: vblank 2\n");
 		crtc3 |= VBLANK_INT_MASK;
 	}
 	if (rdev->irq.crtc_vblank_int[3] ||
-	    rdev->irq.pflip[3]) {
+	    atomic_read(&rdev->irq.pflip[3])) {
 		DRM_DEBUG("si_irq_set: vblank 3\n");
 		crtc4 |= VBLANK_INT_MASK;
 	}
 	if (rdev->irq.crtc_vblank_int[4] ||
-	    rdev->irq.pflip[4]) {
+	    atomic_read(&rdev->irq.pflip[4])) {
 		DRM_DEBUG("si_irq_set: vblank 4\n");
 		crtc5 |= VBLANK_INT_MASK;
 	}
 	if (rdev->irq.crtc_vblank_int[5] ||
-	    rdev->irq.pflip[5]) {
+	    atomic_read(&rdev->irq.pflip[5])) {
 		DRM_DEBUG("si_irq_set: vblank 5\n");
 		crtc6 |= VBLANK_INT_MASK;
 	}
@@ -3359,29 +3358,27 @@ int si_irq_process(struct radeon_device *rdev)
 	u32 rptr;
 	u32 src_id, src_data, ring_id;
 	u32 ring_index;
-	unsigned long flags;
 	bool queue_hotplug = false;
 
 	if (!rdev->ih.enabled || rdev->shutdown)
 		return IRQ_NONE;
 
 	wptr = si_get_ih_wptr(rdev);
+
+restart_ih:
+	/* is somebody else already processing irqs? */
+	if (atomic_xchg(&rdev->ih.lock, 1))
+		return IRQ_NONE;
+
 	rptr = rdev->ih.rptr;
 	DRM_DEBUG("si_irq_process start: rptr %d, wptr %d\n", rptr, wptr);
 
-	spin_lock_irqsave(&rdev->ih.lock, flags);
-	if (rptr == wptr) {
-		spin_unlock_irqrestore(&rdev->ih.lock, flags);
-		return IRQ_NONE;
-	}
-restart_ih:
 	/* Order reading of wptr vs. reading of IH ring data */
 	rmb();
 
 	/* display interrupts */
 	si_irq_ack(rdev);
 
-	rdev->ih.wptr = wptr;
 	while (rptr != wptr) {
 		/* wptr/rptr are in bytes! */
 		ring_index = rptr / 4;
@@ -3399,7 +3396,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[0])
+					if (atomic_read(&rdev->irq.pflip[0]))
 						radeon_crtc_handle_flip(rdev, 0);
 					rdev->irq.stat_regs.evergreen.disp_int &= ~LB_D1_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D1 vblank\n");
@@ -3425,7 +3422,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[1])
+					if (atomic_read(&rdev->irq.pflip[1]))
 						radeon_crtc_handle_flip(rdev, 1);
 					rdev->irq.stat_regs.evergreen.disp_int_cont &= ~LB_D2_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D2 vblank\n");
@@ -3451,7 +3448,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[2])
+					if (atomic_read(&rdev->irq.pflip[2]))
 						radeon_crtc_handle_flip(rdev, 2);
 					rdev->irq.stat_regs.evergreen.disp_int_cont2 &= ~LB_D3_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D3 vblank\n");
@@ -3477,7 +3474,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[3])
+					if (atomic_read(&rdev->irq.pflip[3]))
 						radeon_crtc_handle_flip(rdev, 3);
 					rdev->irq.stat_regs.evergreen.disp_int_cont3 &= ~LB_D4_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D4 vblank\n");
@@ -3503,7 +3500,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[4])
+					if (atomic_read(&rdev->irq.pflip[4]))
 						radeon_crtc_handle_flip(rdev, 4);
 					rdev->irq.stat_regs.evergreen.disp_int_cont4 &= ~LB_D5_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D5 vblank\n");
@@ -3529,7 +3526,7 @@ restart_ih:
 						rdev->pm.vblank_sync = true;
 						wake_up(&rdev->irq.vblank_queue);
 					}
-					if (rdev->irq.pflip[5])
+					if (atomic_read(&rdev->irq.pflip[5]))
 						radeon_crtc_handle_flip(rdev, 5);
 					rdev->irq.stat_regs.evergreen.disp_int_cont5 &= ~LB_D6_VBLANK_INTERRUPT;
 					DRM_DEBUG("IH: D6 vblank\n");
@@ -3620,7 +3617,6 @@ restart_ih:
 			break;
 		case 233: /* GUI IDLE */
 			DRM_DEBUG("IH: GUI idle\n");
-			rdev->pm.gui_idle = true;
 			wake_up(&rdev->irq.idle_queue);
 			break;
 		default:
@@ -3632,15 +3628,17 @@ restart_ih:
 		rptr += 16;
 		rptr &= rdev->ih.ptr_mask;
 	}
-	/* make sure wptr hasn't changed while processing */
-	wptr = si_get_ih_wptr(rdev);
-	if (wptr != rdev->ih.wptr)
-		goto restart_ih;
 	if (queue_hotplug)
 		schedule_work(&rdev->hotplug_work);
 	rdev->ih.rptr = rptr;
 	WREG32(IH_RB_RPTR, rdev->ih.rptr);
-	spin_unlock_irqrestore(&rdev->ih.lock, flags);
+	atomic_set(&rdev->ih.lock, 0);
+
+	/* make sure wptr hasn't changed while processing */
+	wptr = si_get_ih_wptr(rdev);
+	if (wptr != rptr)
+		goto restart_ih;
+
 	return IRQ_HANDLED;
 }