drm/amdgpu: allow multiple sessions in the same VCE IB

We always used updated firmware for amdgpu, so this actually should work fine.

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

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index 473eb09..718f227 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -575,12 +575,10 @@ static int amdgpu_vce_cs_reloc(struct amdgpu_cs_parser *p, uint32_t ib_idx,
  * we we don't have another free session index.
  */
 static int amdgpu_vce_validate_handle(struct amdgpu_cs_parser *p,
-                                     uint32_t handle, bool *allocated)
+                                     uint32_t handle, uint32_t *allocated)
 {
        unsigned i;
 
-       *allocated = false;
-
        /* validate the handle */
        for (i = 0; i < AMDGPU_MAX_VCE_HANDLES; ++i) {
                if (atomic_read(&p->adev->vce.handles[i]) == handle) {
@@ -597,7 +595,7 @@ static int amdgpu_vce_validate_handle(struct amdgpu_cs_parser *p,
                if (!atomic_cmpxchg(&p->adev->vce.handles[i], 0, handle)) {
                        p->adev->vce.filp[i] = p->filp;
                        p->adev->vce.img_size[i] = 0;
-                       *allocated = true;
+                       *allocated |= 1 << i;
                        return i;
                }
        }
@@ -617,9 +615,9 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p, uint32_t ib_idx)
        struct amdgpu_ib *ib = &p->job->ibs[ib_idx];
        unsigned fb_idx = 0, bs_idx = 0;
        int session_idx = -1;
-       bool destroyed = false;
-       bool created = false;
-       bool allocated = false;
+       uint32_t destroyed = 0;
+       uint32_t created = 0;
+       uint32_t allocated = 0;
        uint32_t tmp, handle = 0;
        uint32_t *size = &tmp;
        int i, r = 0, idx = 0;
@@ -636,19 +634,15 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p, uint32_t ib_idx)
                        goto out;
                }
 
-               if (destroyed) {
-                       DRM_ERROR("No other command allowed after destroy!\n");
-                       r = -EINVAL;
-                       goto out;
-               }
-
                switch (cmd) {
                case 0x00000001: /* session */
                        handle = amdgpu_get_ib_value(p, ib_idx, idx + 2);
                        session_idx = amdgpu_vce_validate_handle(p, handle,
                                                                 &allocated);
-                       if (session_idx < 0)
-                               return session_idx;
+                       if (session_idx < 0) {
+                               r = session_idx;
+                               goto out;
+                       }
                        size = &p->adev->vce.img_size[session_idx];
                        break;
 
@@ -658,8 +652,12 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p, uint32_t ib_idx)
                        break;
 
                case 0x01000001: /* create */
-                       created = true;
-                       if (!allocated) {
+                       created |= 1 << session_idx;
+                       if (destroyed & (1 << session_idx)) {
+                               destroyed &= ~(1 << session_idx);
+                               allocated |= 1 << session_idx;
+
+                       } else if (!(allocated & (1 << session_idx))) {
                                DRM_ERROR("Handle already in use!\n");
                                r = -EINVAL;
                                goto out;
@@ -692,7 +690,7 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p, uint32_t ib_idx)
                        break;
 
                case 0x02000001: /* destroy */
-                       destroyed = true;
+                       destroyed |= 1 << session_idx;
                        break;
 
                case 0x05000001: /* context buffer */
@@ -732,21 +730,24 @@ int amdgpu_vce_ring_parse_cs(struct amdgpu_cs_parser *p, uint32_t ib_idx)
                idx += len / 4;
        }
 
-       if (allocated && !created) {
+       if (allocated & ~created) {
                DRM_ERROR("New session without create command!\n");
                r = -ENOENT;
        }
 
 out:
-       if ((!r && destroyed) || (r && allocated)) {
-               /*
-                * IB contains a destroy msg or we have allocated an
-                * handle and got an error, anyway free the handle
-                */
-               for (i = 0; i < AMDGPU_MAX_VCE_HANDLES; ++i)
-                       atomic_cmpxchg(&p->adev->vce.handles[i], handle, 0);
+       if (!r) {
+               /* No error, free all destroyed handle slots */
+               tmp = destroyed;
+       } else {
+               /* Error during parsing, free all allocated handle slots */
+               tmp = allocated;
        }
 
+       for (i = 0; i < AMDGPU_MAX_VCE_HANDLES; ++i)
+               if (tmp & (1 << i))
+                       atomic_set(&p->adev->vce.handles[i], 0);
+
        return r;
 }