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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Karol Herbst <kherbst@redhat.com>
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Date: Tue, 28 Apr 2020 18:54:04 +0200
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Subject: [PATCH] device: detect vGPUs
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Using ENODEV as this prevents probe failed errors in dmesg.
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v2: move check further down
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Signed-off-by: Karol Herbst <kherbst@redhat.com>
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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
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---
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drivers/gpu/drm/nouveau/nvkm/engine/device/base.c | 15 ++++++++++++---
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1 file changed, 12 insertions(+), 3 deletions(-)
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diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
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index c732074bf790..f977dddcd809 100644
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--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
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+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
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@@ -2948,7 +2948,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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{
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struct nvkm_subdev *subdev;
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u64 mmio_base, mmio_size;
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- u32 boot0, strap;
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+ u32 boot0, boot1, strap;
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void __iomem *map = NULL;
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int ret = -EEXIST, i;
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unsigned chipset;
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@@ -2998,9 +2998,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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}
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}
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- /* read boot0 and strapping information */
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boot0 = ioread32_native(map + 0x000000);
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- strap = ioread32_native(map + 0x101000);
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/* chipset can be overridden for devel/testing purposes */
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chipset = nvkm_longopt(device->cfgopt, "NvChipset", 0);
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@@ -3158,6 +3156,17 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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nvdev_info(device, "NVIDIA %s (%08x)\n",
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device->chip->name, boot0);
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+ /* vGPU detection */
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+ boot1 = ioread32_native(map + 0x000004);
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+ if (device->card_type >= TU100 && (boot1 & 0x00030000)) {
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+ nvdev_info(device, "vGPUs are not supported\n");
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+ ret = -ENODEV;
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+ goto done;
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+ }
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+
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+ /* read strapping information */
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+ strap = ioread32_native(map + 0x101000);
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+
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/* determine frequency of timing crystal */
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if ( device->card_type <= NV_10 || device->chipset < 0x17 ||
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(device->chipset >= 0x20 && device->chipset < 0x25))
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--
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2.26.2
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