novueau/winsys: nv_device_info.has_transfer_queue

Add an option that signals if we can use transfer queues on the current
hardware and kernel or not.

Reviewed-by: Thomas H.P. Andersen <phomes@gmail.com>
Reviewed-by: Mary Guillemard <mary@mary.zone>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36617>

src/nouveau/headers/nv_device_info.h

@@ -39,6 +39,8 @@ struct nv_device_info {
    uint8_t mp_per_tpc;
    uint8_t max_warps_per_mp;
 
+   bool has_transfer_queue;
+
    /** Non-coherent memory map atom size */
    uint16_t nc_atom_size_B;
 

src/nouveau/winsys/nouveau_device.c

@@ -17,6 +17,8 @@
 #include <unistd.h>
 #include <xf86drm.h>
 
+#include "clc597.h"
+
 static const char *
 name_for_chip(uint32_t dev_id,
               uint16_t subsystem_id,
@@ -518,6 +520,18 @@ nouveau_ws_device_new(drmDevicePtr drm_device)
    device->info.max_warps_per_mp = max_warps_per_mp_for_sm(device->info.sm);
    device->info.mp_per_tpc = mp_per_tpc_for_chipset(device->info.chipset);
 
+   /* Transfer queues require two kernel fixes:
+    *   0ef5c4e4db ("nouveau: fix disabling the nonstall irq due to storm code")
+    *   2cb66ae604 ("nouveau: Membar before between semaphore writes and the interrupt")
+    *
+    * Any kernel with compression support should have these fixes and gsp
+    * by default. Turing may not be fixed without gsp, but that should be rare on
+    * gsp-by-default kernels. Note that older architectures have not been fixed,
+    * so they require additional kernel work before we can expose this.
+    */
+   device->info.has_transfer_queue = device->nouveau_version >= 0x01000401 &&
+                                     device->info.cls_eng3d >= TURING_A;
+
    init_shared_mem_sizes(&device->info);
 
    nouveau_ws_context_destroy(tmp_ctx);