From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Karol Herbst Date: Tue, 28 Apr 2020 18:54:02 +0200 Subject: [PATCH] device: rework mmio mapping code to get rid of second map Fixes warnings on GPUs with smaller a smaller mmio region like vGPUs. Signed-off-by: Karol Herbst Signed-off-by: Ben Skeggs --- .../gpu/drm/nouveau/nvkm/engine/device/base.c | 27 ++++++++++--------- 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c index 8ebbe1656008..37589f36546d 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c @@ -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); - /* identify the chipset, and determine classes of subdev/engines */ - if (detect) { - map = ioremap(mmio_base, 0x102000); - if (ret = -ENOMEM, map == NULL) + 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) { /* 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; } -- 2.26.2