zink: implement unsynchronized staging uploads for buffers

similar to images, this comes from unsynchronized texture_subdata
serialization in tc

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34186>

src/gallium/drivers/zink/zink_context.c

@@ -4771,8 +4771,13 @@ end:
 
 void
 zink_copy_buffer(struct zink_context *ctx, struct zink_resource *dst, struct zink_resource *src,
-                 unsigned dst_offset, unsigned src_offset, unsigned size)
+                 unsigned dst_offset, unsigned src_offset, unsigned size, bool unsync)
 {
+   if (unsync) {
+      util_queue_fence_wait(&ctx->flush_fence);
+      util_queue_fence_reset(&ctx->unsync_fence);
+   }
+
    VkBufferCopy region;
    region.srcOffset = src_offset;
    region.dstOffset = dst_offset;
@@ -4783,11 +4788,15 @@ zink_copy_buffer(struct zink_context *ctx, struct zink_resource *dst, struct zin
    /* must barrier if something wrote the valid buffer range */
    bool valid_write = zink_check_valid_buffer_src_access(ctx, src, src_offset, size);
    bool unordered_src = !valid_write && !zink_check_unordered_transfer_access(src, 0, &box);
+   /* unsync should only occur during subdata with staging resource */
+   if (!unsync)
       zink_screen(ctx->base.screen)->buffer_barrier(ctx, src, VK_ACCESS_TRANSFER_READ_BIT, 0);
    bool unordered_dst = zink_resource_buffer_transfer_dst_barrier(ctx, dst, dst_offset, size);
    bool can_unorder = unordered_dst && unordered_src && !ctx->no_reorder;
-   VkCommandBuffer cmdbuf = can_unorder ? ctx->bs->reordered_cmdbuf : zink_get_cmdbuf(ctx, src, dst);
+   VkCommandBuffer cmdbuf = unsync ? ctx->bs->unsynchronized_cmdbuf : 
+                                     can_unorder ? ctx->bs->reordered_cmdbuf : zink_get_cmdbuf(ctx, src, dst);
    ctx->bs->has_reordered_work |= can_unorder;
+   ctx->bs->has_unsync |= unsync;
    zink_batch_reference_resource_rw(ctx, src, false);
    zink_batch_reference_resource_rw(ctx, dst, true);
    if (unlikely(zink_debug & ZINK_DEBUG_SYNC)) {
@@ -4804,6 +4813,9 @@ zink_copy_buffer(struct zink_context *ctx, struct zink_resource *dst, struct zin
    bool marker = zink_cmd_debug_marker_begin(ctx, cmdbuf, "copy_buffer(%d)", size);
    VKCTX(CmdCopyBuffer)(cmdbuf, src->obj->buffer, dst->obj->buffer, 1, &region);
    zink_cmd_debug_marker_end(ctx, cmdbuf, marker);
+
+   if (unsync)
+      util_queue_fence_signal(&ctx->unsync_fence);
 }
 
 void
@@ -5108,7 +5120,7 @@ zink_resource_copy_region(struct pipe_context *pctx,
       zink_cmd_debug_marker_end(ctx, cmdbuf, marker);
    } else if (dst->base.b.target == PIPE_BUFFER &&
               src->base.b.target == PIPE_BUFFER) {
-      zink_copy_buffer(ctx, dst, src, dstx, src_box->x, src_box->width);
+      zink_copy_buffer(ctx, dst, src, dstx, src_box->x, src_box->width, false);
    } else
       zink_copy_image_buffer(ctx, dst, src, dst_level, dstx, dsty, dstz, src_level, src_box, 0);
    if (ctx->oom_flush && !ctx->in_rp && !ctx->unordered_blitting)

src/gallium/drivers/zink/zink_context.h

@@ -202,7 +202,7 @@ void
 zink_cmd_debug_marker_end(struct zink_context *ctx, VkCommandBuffer cmdbuf,bool emitted);
 void
 zink_copy_buffer(struct zink_context *ctx, struct zink_resource *dst, struct zink_resource *src,
-                 unsigned dst_offset, unsigned src_offset, unsigned size);
+                 unsigned dst_offset, unsigned src_offset, unsigned size, bool unsync);
 #ifdef __cplusplus
 }
 #endif

src/gallium/drivers/zink/zink_query.c

@@ -1449,7 +1449,7 @@ zink_get_query_result_resource(struct pipe_context *pctx,
       }
       struct pipe_resource *staging = pipe_buffer_create(pctx->screen, 0, PIPE_USAGE_STAGING, src_offset + result_size);
       copy_results_to_buffer(ctx, query, zink_resource(staging), 0, 1, size_flags | VK_QUERY_RESULT_WITH_AVAILABILITY_BIT | flag);
-      zink_copy_buffer(ctx, res, zink_resource(staging), offset, result_size * get_num_results(query), result_size);
+      zink_copy_buffer(ctx, res, zink_resource(staging), offset, result_size * get_num_results(query), result_size, false);
       pipe_resource_reference(&staging, NULL);
       return;
    }
@@ -1474,7 +1474,7 @@ zink_get_query_result_resource(struct pipe_context *pctx,
             /* internal qbo always writes 64bit value so we can just direct copy */
             zink_copy_buffer(ctx, res, zink_resource(query->curr_qbo->buffers[0]), offset,
                              get_buffer_offset(query),
-                             result_size);
+                             result_size, false);
          } else
             /* have to do a new copy for 32bit */
             copy_results_to_buffer(ctx, query, res, offset, 1, size_flags);

src/gallium/drivers/zink/zink_resource.c

@@ -2344,9 +2344,8 @@ zink_buffer_map(struct pipe_context *pctx,
    bool is_cached_mem = (screen->info.mem_props.memoryTypes[res->obj->bo->base.base.placement].propertyFlags & VK_STAGING_RAM) == VK_STAGING_RAM;
    /* but this is only viable with a certain amount of vram since it may fully duplicate lots of large buffers */
    bool host_mem_type_check = screen->always_cached_upload ? is_cached_mem : res->obj->host_visible;
-   if (usage & PIPE_MAP_DISCARD_RANGE &&
-       ((!res->obj->host_visible || !(usage & (PIPE_MAP_UNSYNCHRONIZED | PIPE_MAP_PERSISTENT))) ||
-        (!host_mem_type_check && !(usage & (PIPE_MAP_UNSYNCHRONIZED | PIPE_MAP_PERSISTENT))))) {
+   if (usage & PIPE_MAP_DISCARD_RANGE && !(usage & PIPE_MAP_PERSISTENT) &&
+       (!host_mem_type_check || !(usage & (PIPE_MAP_UNSYNCHRONIZED)))) {
 
       /* Check if mapping this buffer would cause waiting for the GPU.
        */
@@ -2356,6 +2355,11 @@ zink_buffer_map(struct pipe_context *pctx,
          /* Do a wait-free write-only transfer using a temporary buffer. */
          unsigned offset;
 
+         if (usage & PIPE_MAP_UNSYNCHRONIZED) {
+            trans->offset = box->x % MAX2(screen->info.props.limits.minMemoryMapAlignment, 1 << MIN_SLAB_ORDER);
+            trans->staging_res = pipe_buffer_create(&screen->base, PIPE_BIND_LINEAR, PIPE_USAGE_STAGING, box->width + trans->offset);
+            trans->unsync_upload = true;
+         } else {
             /* If we are not called from the driver thread, we have
             * to use the uploader from u_threaded_context, which is
             * local to the calling thread.
@@ -2368,8 +2372,9 @@ zink_buffer_map(struct pipe_context *pctx,
             u_upload_alloc(mgr, 0, box->width,
                         screen->info.props.limits.minMemoryMapAlignment, &offset,
                         (struct pipe_resource **)&trans->staging_res, (void **)&ptr);
-         res = zink_resource(trans->staging_res);
             trans->offset = offset;
+         }
+         res = zink_resource(trans->staging_res);
          usage |= PIPE_MAP_UNSYNCHRONIZED;
          ptr = ((uint8_t *)ptr);
       } else {
@@ -2401,7 +2406,7 @@ overwrite:
             ctx = screen->copy_context;
          }
          if (usage & PIPE_MAP_READ)
-            zink_copy_buffer(ctx, staging_res, res, trans->offset, box->x, box->width);
+            zink_copy_buffer(ctx, staging_res, res, trans->offset, box->x, box->width, false);
          res = staging_res;
          usage &= ~PIPE_MAP_UNSYNCHRONIZED;
          map_offset = trans->offset;
@@ -2752,7 +2757,7 @@ zink_transfer_flush_region(struct pipe_context *pctx,
          struct zink_resource *staging_res = zink_resource(trans->staging_res);
 
          if (ptrans->resource->target == PIPE_BUFFER)
-            zink_copy_buffer(ctx, res, staging_res, dst_offset, src_offset, size);
+            zink_copy_buffer(ctx, res, staging_res, dst_offset, src_offset, size, trans->unsync_upload);
          else
             zink_transfer_copy_bufimage(ctx, res, staging_res, trans);
       }

src/gallium/drivers/zink/zink_synchronization.cpp

@@ -689,7 +689,7 @@ buffer_needs_barrier(struct zink_resource *res, VkAccessFlags flags, VkPipelineS
 
 
 
-template <barrier_type BARRIER_API>
+template <barrier_type BARRIER_API, bool UNSYNCHRONIZED>
 void
 zink_resource_buffer_barrier(struct zink_context *ctx, struct zink_resource *res, VkAccessFlags flags, VkPipelineStageFlags pipeline)
 {
@@ -708,6 +708,7 @@ zink_resource_buffer_barrier(struct zink_context *ctx, struct zink_resource *res
    }
    bool unordered_usage_matches = res->obj->unordered_access && usage_matches;
    bool unordered = unordered_res_exec(ctx, res, is_write);
+   assert(!UNSYNCHRONIZED || !usage_matches);
    if (!buffer_needs_barrier(res, flags, pipeline, unordered))
       return;
    if (completed) {
@@ -734,18 +735,20 @@ zink_resource_buffer_barrier(struct zink_context *ctx, struct zink_resource *res
     * - there is no current-batch unordered access AND previous batch usage is not write access
     * - there is current-batch unordered access AND the unordered access is not write access
     */
-   bool can_skip_unordered = !unordered ? false : !zink_resource_access_is_write(!unordered_usage_matches ? res->obj->access : res->obj->unordered_access);
+   bool can_skip_unordered = !unordered || UNSYNCHRONIZED ? false : !zink_resource_access_is_write(!unordered_usage_matches ? res->obj->access : res->obj->unordered_access);
    /* ordered barriers can be skipped if both:
     * - there is no current access
     * - there is no current-batch unordered access
     */
-   bool can_skip_ordered = unordered ? false : (!res->obj->access && !unordered_usage_matches);
+   bool can_skip_ordered = unordered || UNSYNCHRONIZED ? false : (!res->obj->access && !unordered_usage_matches);
    if (ctx->no_reorder)
       can_skip_unordered = can_skip_ordered = false;
 
    if (!can_skip_unordered && !can_skip_ordered) {
-      VkCommandBuffer cmdbuf = is_write ? zink_get_cmdbuf(ctx, NULL, res) : zink_get_cmdbuf(ctx, res, NULL);
+      VkCommandBuffer cmdbuf = UNSYNCHRONIZED ? ctx->bs->unsynchronized_cmdbuf :
+                                                is_write ? zink_get_cmdbuf(ctx, NULL, res) : zink_get_cmdbuf(ctx, res, NULL);
       bool marker = false;
+      ctx->bs->has_unsync |= UNSYNCHRONIZED;
       if (unlikely(zink_tracing)) {
          char buf[4096];
          zink_string_vkflags_unroll(buf, sizeof(buf), flags, (zink_vkflags_func)vk_AccessFlagBits_to_str);
@@ -758,6 +761,7 @@ zink_resource_buffer_barrier(struct zink_context *ctx, struct zink_resource *res
       zink_cmd_debug_marker_end(ctx, cmdbuf, marker);
    }
 
+   if (!UNSYNCHRONIZED)
       resource_check_defer_buffer_barrier(ctx, res, pipeline);
 
    if (is_write)
@@ -784,11 +788,13 @@ void
 zink_synchronization_init(struct zink_screen *screen)
 {
    if (screen->info.have_vulkan13 || screen->info.have_KHR_synchronization2) {
-      screen->buffer_barrier = zink_resource_buffer_barrier<barrier_KHR_synchronzation2>;
+      screen->buffer_barrier = zink_resource_buffer_barrier<barrier_KHR_synchronzation2, false>;
+      screen->buffer_barrier_unsync = zink_resource_buffer_barrier<barrier_KHR_synchronzation2, true>;
       screen->image_barrier = zink_resource_image_barrier<barrier_KHR_synchronzation2, false>;
       screen->image_barrier_unsync = zink_resource_image_barrier<barrier_KHR_synchronzation2, true>;
    } else {
-      screen->buffer_barrier = zink_resource_buffer_barrier<barrier_default>;
+      screen->buffer_barrier = zink_resource_buffer_barrier<barrier_default, false>;
+      screen->buffer_barrier_unsync = zink_resource_buffer_barrier<barrier_default, true>;
       screen->image_barrier = zink_resource_image_barrier<barrier_default, false>;
       screen->image_barrier_unsync = zink_resource_image_barrier<barrier_default, true>;
    }

src/gallium/drivers/zink/zink_types.h

@@ -1371,6 +1371,7 @@ struct zink_transfer {
    struct pipe_resource *staging_res;
    unsigned offset;
    unsigned depthPitch;
+   bool unsync_upload;
 };
 
 
@@ -1515,6 +1516,7 @@ struct zink_screen {
    struct vk_uncompacted_dispatch_table vk;
 
    void (*buffer_barrier)(struct zink_context *ctx, struct zink_resource *res, VkAccessFlags flags, VkPipelineStageFlags pipeline);
+   void (*buffer_barrier_unsync)(struct zink_context *ctx, struct zink_resource *res, VkAccessFlags flags, VkPipelineStageFlags pipeline);
    void (*image_barrier)(struct zink_context *ctx, struct zink_resource *res, VkImageLayout new_layout, VkAccessFlags flags, VkPipelineStageFlags pipeline);
    void (*image_barrier_unsync)(struct zink_context *ctx, struct zink_resource *res, VkImageLayout new_layout, VkAccessFlags flags, VkPipelineStageFlags pipeline);