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drm/nouveau/device: rework mmio mapping code to get rid of second map

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Fixes warnings on GPUs with smaller a smaller mmio region like vGPUs.

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Karol Herbst 2020-04-28 18:54:02 +02:00 committed by Ben Skeggs
parent 94db9a3b0f
commit 24d5ff40a7
1 changed files with 15 additions and 12 deletions
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27
drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
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@ -2935,7 +2935,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
struct nvkm_subdev *subdev;
u64 mmio_base, mmio_size;
u32 boot0, strap;
void __iomem *map;
void __iomem *map = NULL;
int ret = -EEXIST, i;
unsigned chipset;
@ -2961,12 +2961,17 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
mmio_base = device->func->resource_addr(device, 0);
mmio_size = device->func->resource_size(device, 0);
if (detect || mmio) {
map = ioremap(mmio_base, mmio_size);
if (map == NULL) {
nvdev_error(device, "unable to map PRI\n");
ret = -ENOMEM;
goto done;
}
}
/* identify the chipset, and determine classes of subdev/engines */
if (detect) {
map = ioremap(mmio_base, 0x102000);
if (ret = -ENOMEM, map == NULL)
goto done;
/* switch mmio to cpu's native endianness */
#ifndef __BIG_ENDIAN
if (ioread32_native(map + 0x000004) != 0x00000000) {
@ -2980,7 +2985,6 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
/* read boot0 and strapping information */
boot0 = ioread32_native(map + 0x000000);
strap = ioread32_native(map + 0x101000);
iounmap(map);
/* chipset can be overridden for devel/testing purposes */
chipset = nvkm_longopt(device->cfgopt, "NvChipset", 0);
@ -3159,12 +3163,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
device->name = device->chip->name;
if (mmio) {
device->pri = ioremap(mmio_base, mmio_size);
if (!device->pri) {
nvdev_error(device, "unable to map PRI\n");
ret = -ENOMEM;
goto done;
}
device->pri = map;
}
mutex_init(&device->mutex);
@ -3254,6 +3253,10 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
ret = 0;
done:
if (map && (!mmio || ret)) {
device->pri = NULL;
iounmap(map);
}
mutex_unlock(&nv_devices_mutex);
return ret;
}