From d4623da9a35ee48c8e69bc1487b5fc60280173b3 Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Fri, 16 Feb 2024 15:39:25 -0600
Subject: [PATCH] nouveau/winsys: Getch the BAR size from the kernel

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26622>
---
 src/nouveau/headers/nv_device_info.h | 1 +
 src/nouveau/winsys/nouveau_device.c  | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/src/nouveau/headers/nv_device_info.h b/src/nouveau/headers/nv_device_info.h
index d3c9fa07982..96843fcd709 100644
--- a/src/nouveau/headers/nv_device_info.h
+++ b/src/nouveau/headers/nv_device_info.h
@@ -43,6 +43,7 @@ struct nv_device_info {
    uint16_t cls_compute;
 
    uint64_t vram_size_B;
+   uint64_t bar_size_B;
 };
 
 #endif /* NV_DEVINFO_H */
diff --git a/src/nouveau/winsys/nouveau_device.c b/src/nouveau/winsys/nouveau_device.c
index 9f58a1c5ff9..97177090aee 100644
--- a/src/nouveau/winsys/nouveau_device.c
+++ b/src/nouveau/winsys/nouveau_device.c
@@ -317,6 +317,10 @@ nouveau_ws_device_new(drmDevicePtr drm_device)
    else
       device->local_mem_domain = NOUVEAU_GEM_DOMAIN_VRAM;
 
+   if (drm_device->bustype == DRM_BUS_PCI &&
+       !nouveau_ws_param(fd, NOUVEAU_GETPARAM_VRAM_BAR_SIZE, &value))
+      device->info.bar_size_B = value;
+
    if (nouveau_ws_param(fd, NOUVEAU_GETPARAM_GRAPH_UNITS, &value))
       goto out_err;