drm/radeon: improve ring debugfs a bit

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 38 insertions, 18 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index ca2d71afeb02..cc0c9b2a8819 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -790,34 +790,54 @@ static int radeon_debugfs_ring_info(struct seq_file *m, void *data)
         struct radeon_device *rdev = dev->dev_private;
         int ridx = *(int*)node->info_ent->data;
         struct radeon_ring *ring = &rdev->ring[ridx];
+
+        uint32_t rptr, wptr, rptr_next;
         unsigned count, i, j;
-        u32 tmp;
 
         radeon_ring_free_size(rdev, ring);
         count = (ring->ring_size / 4) - ring->ring_free_dw;
-        tmp = radeon_ring_get_wptr(rdev, ring);
-        seq_printf(m, "wptr(0x%04x): 0x%08x [%5d]\n", ring->wptr_reg, tmp, tmp);
-        tmp = radeon_ring_get_rptr(rdev, ring);
-        seq_printf(m, "rptr(0x%04x): 0x%08x [%5d]\n", ring->rptr_reg, tmp, tmp);
+
+        wptr = radeon_ring_get_wptr(rdev, ring);
+        seq_printf(m, "wptr(0x%04x): 0x%08x [%5d]\n",
+                   ring->wptr_reg, wptr, wptr);
+
+        rptr = radeon_ring_get_rptr(rdev, ring);
+        seq_printf(m, "rptr(0x%04x): 0x%08x [%5d]\n",
+                   ring->rptr_reg, rptr, rptr);
+
         if (ring->rptr_save_reg) {
-                seq_printf(m, "rptr next(0x%04x): 0x%08x\n", ring->rptr_save_reg,
-                           RREG32(ring->rptr_save_reg));
-        }
-        seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n", ring->wptr, ring->wptr);
-        seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n", ring->rptr, ring->rptr);
-        seq_printf(m, "last semaphore signal addr : 0x%016llx\n", ring->last_semaphore_signal_addr);
-        seq_printf(m, "last semaphore wait addr   : 0x%016llx\n", ring->last_semaphore_wait_addr);
+                rptr_next = RREG32(ring->rptr_save_reg);
+                seq_printf(m, "rptr next(0x%04x): 0x%08x [%5d]\n",
+                           ring->rptr_save_reg, rptr_next, rptr_next);
+        } else
+                rptr_next = ~0;
+
+        seq_printf(m, "driver's copy of the wptr: 0x%08x [%5d]\n",
+                   ring->wptr, ring->wptr);
+        seq_printf(m, "driver's copy of the rptr: 0x%08x [%5d]\n",
+                   ring->rptr, ring->rptr);
+        seq_printf(m, "last semaphore signal addr : 0x%016llx\n",
+                   ring->last_semaphore_signal_addr);
+        seq_printf(m, "last semaphore wait addr   : 0x%016llx\n",
+                   ring->last_semaphore_wait_addr);
         seq_printf(m, "%u free dwords in ring\n", ring->ring_free_dw);
         seq_printf(m, "%u dwords in ring\n", count);
+
+        if (!ring->ready)
+                return 0;
+
         /* print 8 dw before current rptr as often it's the last executed
          * packet that is the root issue
          */
-        i = (ring->rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask;
-        if (ring->ready) {
-                for (j = 0; j <= (count + 32); j++) {
-                        seq_printf(m, "r[%5d]=0x%08x\n", i, ring->ring[i]);
-                        i = (i + 1) & ring->ptr_mask;
-                }
+        i = (rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask;
+        for (j = 0; j <= (count + 32); j++) {
+                seq_printf(m, "r[%5d]=0x%08x", i, ring->ring[i]);
+                if (rptr == i)
+                        seq_puts(m, " *");
+                if (rptr_next == i)
+                        seq_puts(m, " #");
+                seq_puts(m, "\n");
+                i = (i + 1) & ring->ptr_mask;
         }
         return 0;
 }