85 lines
2.6 KiB
Diff
85 lines
2.6 KiB
Diff
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 18:54:02 +0200
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Subject: [PATCH] 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.
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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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.../gpu/drm/nouveau/nvkm/engine/device/base.c | 27 ++++++++++---------
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1 file changed, 15 insertions(+), 12 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 8ebbe1656008..37589f36546d 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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@@ -2935,7 +2935,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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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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- void __iomem *map;
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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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@@ -2961,12 +2961,17 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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mmio_base = device->func->resource_addr(device, 0);
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mmio_size = device->func->resource_size(device, 0);
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- /* identify the chipset, and determine classes of subdev/engines */
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- if (detect) {
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- map = ioremap(mmio_base, 0x102000);
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- if (ret = -ENOMEM, map == NULL)
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+ if (detect || mmio) {
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+ map = ioremap(mmio_base, mmio_size);
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+ if (map == NULL) {
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+ nvdev_error(device, "unable to map PRI\n");
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+ ret = -ENOMEM;
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goto done;
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+ }
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+ }
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+ /* identify the chipset, and determine classes of subdev/engines */
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+ if (detect) {
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/* switch mmio to cpu's native endianness */
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#ifndef __BIG_ENDIAN
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if (ioread32_native(map + 0x000004) != 0x00000000) {
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@@ -2980,7 +2985,6 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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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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- iounmap(map);
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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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@@ -3159,12 +3163,7 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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device->name = device->chip->name;
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if (mmio) {
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- device->pri = ioremap(mmio_base, mmio_size);
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- if (!device->pri) {
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- nvdev_error(device, "unable to map PRI\n");
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- ret = -ENOMEM;
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- goto done;
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- }
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+ device->pri = map;
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}
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mutex_init(&device->mutex);
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@@ -3254,6 +3253,10 @@ nvkm_device_ctor(const struct nvkm_device_func *func,
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ret = 0;
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done:
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+ if (map && (!mmio || ret)) {
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+ device->pri = NULL;
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+ iounmap(map);
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+ }
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mutex_unlock(&nv_devices_mutex);
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return ret;
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}
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--
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2.26.2
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