v3dv: use pSizes paramater in vkCmdBindVertexBuffers2

We can use this to specify the maximum vertex index that can
be accessed, which the hardware will use to detect and prevent
out-of-bounds accesses to vertex buffers.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29425>

src/broadcom/vulkan/v3dv_cmd_buffer.c

@@ -3465,16 +3465,31 @@ v3dv_CmdBindVertexBuffers2(VkCommandBuffer commandBuffer,
       if (BITSET_TEST(dyn->dirty, MESA_VK_DYNAMIC_VI_BINDING_STRIDES))
          vb_state_changed = true;
    }
-   /* FIXME: at this moment we don't do any thing with pSizes. */
+
    for (uint32_t i = 0; i < bindingCount; i++) {
-      if (vb[firstBinding + i].buffer != v3dv_buffer_from_handle(pBuffers[i])) {
+      struct v3dv_buffer *buffer = v3dv_buffer_from_handle(pBuffers[i]);
+      if (vb[firstBinding + i].buffer != buffer) {
          vb[firstBinding + i].buffer = v3dv_buffer_from_handle(pBuffers[i]);
          vb_state_changed = true;
       }
+
       if (vb[firstBinding + i].offset != pOffsets[i]) {
          vb[firstBinding + i].offset = pOffsets[i];
          vb_state_changed = true;
       }
+      assert(pOffsets[i] <= buffer->size);
+
+      VkDeviceSize size;
+      if (!pSizes || pSizes[i] == VK_WHOLE_SIZE)
+         size = buffer->size - pOffsets[i];
+      else
+         size = pSizes[i];
+      assert(pOffsets[i] + size <= buffer->size);
+
+      if (vb[firstBinding + i].size != size) {
+         vb[firstBinding + i].size = size;
+         vb_state_changed = true;
+      }
    }
 
    if (vb_state_changed)

src/broadcom/vulkan/v3dv_private.h

@@ -1389,6 +1389,7 @@ struct v3dv_draw_info {
 struct v3dv_vertex_binding {
    struct v3dv_buffer *buffer;
    VkDeviceSize offset;
+   VkDeviceSize size;
 };
 
 struct v3dv_descriptor_state {

src/broadcom/vulkan/v3dvx_cmd_buffer.c

@@ -2620,7 +2620,9 @@ v3dX(cmd_buffer_emit_gl_shader_state)(struct v3dv_cmd_buffer *cmd_buffer)
 
          attr.stride =
             cmd_buffer->vk.dynamic_graphics_state.vi_binding_strides[binding];
-         attr.maximum_index = 0xffffff;
+
+         attr.maximum_index = attr.stride == 0 ?
+                              1u : MIN2(0xffffffu, c_vb->size / attr.stride);
       }
 
       emitted_va_count++;