intel: Drop legacy execbuffer support

Execbuffer2 support was introduced to libdrm in b50964027b, 10 years
ago, and no driver has used the old execbuf path since.  There's no need
to support 10-year-old kernels.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

intel/intel_bufmgr_gem.c

@@ -114,7 +114,6 @@ typedef struct _drm_intel_bufmgr_gem {
 
 	pthread_mutex_t lock;
 
-	struct drm_i915_gem_exec_object *exec_objects;
 	struct drm_i915_gem_exec_object2 *exec2_objects;
 	drm_intel_bo **exec_bos;
 	int exec_size;
@@ -479,44 +478,6 @@ drm_intel_gem_bo_reference(drm_intel_bo *bo)
  * with the intersection of the memory type flags and the union of the
  * access flags.
  */
-static void
-drm_intel_add_validate_buffer(drm_intel_bo *bo)
-{
-	drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
-	drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
-	int index;
-
-	if (bo_gem->validate_index != -1)
-		return;
-
-	/* Extend the array of validation entries as necessary. */
-	if (bufmgr_gem->exec_count == bufmgr_gem->exec_size) {
-		int new_size = bufmgr_gem->exec_size * 2;
-
-		if (new_size == 0)
-			new_size = 5;
-
-		bufmgr_gem->exec_objects =
-		    realloc(bufmgr_gem->exec_objects,
-			    sizeof(*bufmgr_gem->exec_objects) * new_size);
-		bufmgr_gem->exec_bos =
-		    realloc(bufmgr_gem->exec_bos,
-			    sizeof(*bufmgr_gem->exec_bos) * new_size);
-		bufmgr_gem->exec_size = new_size;
-	}
-
-	index = bufmgr_gem->exec_count;
-	bo_gem->validate_index = index;
-	/* Fill in array entry */
-	bufmgr_gem->exec_objects[index].handle = bo_gem->gem_handle;
-	bufmgr_gem->exec_objects[index].relocation_count = bo_gem->reloc_count;
-	bufmgr_gem->exec_objects[index].relocs_ptr = (uintptr_t) bo_gem->relocs;
-	bufmgr_gem->exec_objects[index].alignment = bo->align;
-	bufmgr_gem->exec_objects[index].offset = 0;
-	bufmgr_gem->exec_bos[index] = bo;
-	bufmgr_gem->exec_count++;
-}
-
 static void
 drm_intel_add_validate_buffer2(drm_intel_bo *bo, int need_fence)
 {
@@ -2006,7 +1967,6 @@ drm_intel_bufmgr_gem_destroy(drm_intel_bufmgr *bufmgr)
 	int i, ret;
 
 	free(bufmgr_gem->exec2_objects);
-	free(bufmgr_gem->exec_objects);
 	free(bufmgr_gem->exec_bos);
 
 	pthread_mutex_destroy(&bufmgr_gem->lock);
@@ -2265,31 +2225,6 @@ drm_intel_gem_bo_clear_relocs(drm_intel_bo *bo, int start)
  * validations to be performed and update the relocation buffers with
  * index values into the validation list.
  */
-static void
-drm_intel_gem_bo_process_reloc(drm_intel_bo *bo)
-{
-	drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
-	int i;
-
-	if (bo_gem->relocs == NULL)
-		return;
-
-	for (i = 0; i < bo_gem->reloc_count; i++) {
-		drm_intel_bo *target_bo = bo_gem->reloc_target_info[i].bo;
-
-		if (target_bo == bo)
-			continue;
-
-		drm_intel_gem_bo_mark_mmaps_incoherent(bo);
-
-		/* Continue walking the tree depth-first. */
-		drm_intel_gem_bo_process_reloc(target_bo);
-
-		/* Add the target to the validate list */
-		drm_intel_add_validate_buffer(target_bo);
-	}
-}
-
 static void
 drm_intel_gem_bo_process_reloc2(drm_intel_bo *bo)
 {
@@ -2330,30 +2265,6 @@ drm_intel_gem_bo_process_reloc2(drm_intel_bo *bo)
 	}
 }
 
-
-static void
-drm_intel_update_buffer_offsets(drm_intel_bufmgr_gem *bufmgr_gem)
-{
-	int i;
-
-	for (i = 0; i < bufmgr_gem->exec_count; i++) {
-		drm_intel_bo *bo = bufmgr_gem->exec_bos[i];
-		drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
-
-		/* Update the buffer offset */
-		if (bufmgr_gem->exec_objects[i].offset != bo->offset64) {
-			DBG("BO %d (%s) migrated: 0x%08x %08x -> 0x%08x %08x\n",
-			    bo_gem->gem_handle, bo_gem->name,
-			    upper_32_bits(bo->offset64),
-			    lower_32_bits(bo->offset64),
-			    upper_32_bits(bufmgr_gem->exec_objects[i].offset),
-			    lower_32_bits(bufmgr_gem->exec_objects[i].offset));
-			bo->offset64 = bufmgr_gem->exec_objects[i].offset;
-			bo->offset = bufmgr_gem->exec_objects[i].offset;
-		}
-	}
-}
-
 static void
 drm_intel_update_buffer_offsets2 (drm_intel_bufmgr_gem *bufmgr_gem)
 {
@@ -2389,73 +2300,6 @@ drm_intel_gem_bo_aub_dump_bmp(drm_intel_bo *bo,
 {
 }
 
-static int
-drm_intel_gem_bo_exec(drm_intel_bo *bo, int used,
-		      drm_clip_rect_t * cliprects, int num_cliprects, int DR4)
-{
-	drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
-	struct drm_i915_gem_execbuffer execbuf;
-	int ret, i;
-
-	if (to_bo_gem(bo)->has_error)
-		return -ENOMEM;
-
-	pthread_mutex_lock(&bufmgr_gem->lock);
-	/* Update indices and set up the validate list. */
-	drm_intel_gem_bo_process_reloc(bo);
-
-	/* Add the batch buffer to the validation list.  There are no
-	 * relocations pointing to it.
-	 */
-	drm_intel_add_validate_buffer(bo);
-
-	memclear(execbuf);
-	execbuf.buffers_ptr = (uintptr_t) bufmgr_gem->exec_objects;
-	execbuf.buffer_count = bufmgr_gem->exec_count;
-	execbuf.batch_start_offset = 0;
-	execbuf.batch_len = used;
-	execbuf.cliprects_ptr = (uintptr_t) cliprects;
-	execbuf.num_cliprects = num_cliprects;
-	execbuf.DR1 = 0;
-	execbuf.DR4 = DR4;
-
-	ret = drmIoctl(bufmgr_gem->fd,
-		       DRM_IOCTL_I915_GEM_EXECBUFFER,
-		       &execbuf);
-	if (ret != 0) {
-		ret = -errno;
-		if (errno == ENOSPC) {
-			DBG("Execbuffer fails to pin. "
-			    "Estimate: %u. Actual: %u. Available: %u\n",
-			    drm_intel_gem_estimate_batch_space(bufmgr_gem->exec_bos,
-							       bufmgr_gem->
-							       exec_count),
-			    drm_intel_gem_compute_batch_space(bufmgr_gem->exec_bos,
-							      bufmgr_gem->
-							      exec_count),
-			    (unsigned int)bufmgr_gem->gtt_size);
-		}
-	}
-	drm_intel_update_buffer_offsets(bufmgr_gem);
-
-	if (bufmgr_gem->bufmgr.debug)
-		drm_intel_gem_dump_validation_list(bufmgr_gem);
-
-	for (i = 0; i < bufmgr_gem->exec_count; i++) {
-		drm_intel_bo_gem *bo_gem = to_bo_gem(bufmgr_gem->exec_bos[i]);
-
-		bo_gem->idle = false;
-
-		/* Disconnect the buffer from the validate list */
-		bo_gem->validate_index = -1;
-		bufmgr_gem->exec_bos[i] = NULL;
-	}
-	bufmgr_gem->exec_count = 0;
-	pthread_mutex_unlock(&bufmgr_gem->lock);
-
-	return ret;
-}
-
 static int
 do_exec2(drm_intel_bo *bo, int used, drm_intel_context *ctx,
 	 drm_clip_rect_t *cliprects, int num_cliprects, int DR4,
@@ -2933,8 +2777,6 @@ drm_public void
 drm_intel_bufmgr_gem_enable_fenced_relocs(drm_intel_bufmgr *bufmgr)
 {
 	drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *)bufmgr;
-
-	if (bufmgr_gem->bufmgr.bo_exec == drm_intel_gem_bo_exec2)
 	bufmgr_gem->fenced_relocs = true;
 }
 
@@ -3700,7 +3542,6 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
 	struct drm_i915_gem_get_aperture aperture;
 	drm_i915_getparam_t gp;
 	int ret, tmp;
-	bool exec2 = false;
 
 	pthread_mutex_lock(&bufmgr_list_mutex);
 
@@ -3774,8 +3615,12 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
 
 	gp.param = I915_PARAM_HAS_EXECBUF2;
 	ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
-	if (!ret)
+	if (ret) {
-		exec2 = true;
+		fprintf(stderr, "i915 does not support EXECBUFER2\n");
+		free(bufmgr_gem);
+		bufmgr_gem = NULL;
+        goto exit;
+    }
 
 	gp.param = I915_PARAM_HAS_BSD;
 	ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
@@ -3878,12 +3723,8 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
 	bufmgr_gem->bufmgr.bo_get_tiling = drm_intel_gem_bo_get_tiling;
 	bufmgr_gem->bufmgr.bo_set_tiling = drm_intel_gem_bo_set_tiling;
 	bufmgr_gem->bufmgr.bo_flink = drm_intel_gem_bo_flink;
-	/* Use the new one if available */
-	if (exec2) {
 	bufmgr_gem->bufmgr.bo_exec = drm_intel_gem_bo_exec2;
 	bufmgr_gem->bufmgr.bo_mrb_exec = drm_intel_gem_bo_mrb_exec2;
-	} else
-		bufmgr_gem->bufmgr.bo_exec = drm_intel_gem_bo_exec;
 	bufmgr_gem->bufmgr.bo_busy = drm_intel_gem_bo_busy;
 	bufmgr_gem->bufmgr.bo_madvise = drm_intel_gem_bo_madvise;
 	bufmgr_gem->bufmgr.destroy = drm_intel_bufmgr_gem_unref;