llvmpipe: add fd type INVALID and ANONYMOUS

This is mainly to ensure internal anonymous file based memory allocs do
not collide with opaque fd type. Since we are here, add INVALID type and
assign to non-Linux internal alloc.

Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38074>

src/gallium/drivers/llvmpipe/lp_texture.c

@@ -1332,6 +1332,7 @@ llvmpipe_allocate_memory(struct pipe_screen *_screen, uint64_t size)
 
    mem->cpu_addr = MAP_FAILED;
    mem->fd = screen->fd_mem_alloc;
+   mem->type = LLVMPIPE_MEMORY_FD_TYPE_ANONYMOUS;
 
    mtx_lock(&screen->mem_mutex);
 
@@ -1351,6 +1352,8 @@ llvmpipe_allocate_memory(struct pipe_screen *_screen, uint64_t size)
    mtx_unlock(&screen->mem_mutex);
 #else
    mem->cpu_addr = malloc(mem->size);
+   mem->fd = -1;
+   mem->type = LLVMPIPE_MEMORY_FD_TYPE_INVALID;
 #endif
 
    return (struct pipe_memory_allocation *)mem;

src/gallium/drivers/llvmpipe/lp_texture.h

@@ -47,6 +47,8 @@ enum lp_texture_usage
 
 enum llvmpipe_memory_fd_type
 {
+   LLVMPIPE_MEMORY_FD_TYPE_INVALID,
+   LLVMPIPE_MEMORY_FD_TYPE_ANONYMOUS,
    LLVMPIPE_MEMORY_FD_TYPE_OPAQUE,
    LLVMPIPE_MEMORY_FD_TYPE_DMA_BUF,
 };