[PATCH 6.8 294/336] Revert "drm/nouveau/firmware: Fix SG_DEBUG error with nvkm_firmware_ctor()"

Greg Kroah-Hartman
2024-05-14T10:51:50Z

From: Dave Airlie <airlied@redhat.com>

commit a222a6470d7eea91193946e8162066fa88da64c2 upstream.

This reverts commit 52a6947bf576b97ff8e14bb0a31c5eaf2d0d96e2.

This causes loading failures in
[ 0.367379] nouveau 0000:01:00.0: NVIDIA GP104 (134000a1)
[ 0.474499] nouveau 0000:01:00.0: bios: version 86.04.50.80.13
[ 0.474620] nouveau 0000:01:00.0: pmu: firmware unavailable
[ 0.474977] nouveau 0000:01:00.0: fb: 8192 MiB GDDR5
[ 0.484371] nouveau 0000:01:00.0: sec2(acr): mbox 00000001 00000000
[ 0.484377] nouveau 0000:01:00.0: sec2(acr):load: boot failed: -5
[ 0.484379] nouveau 0000:01:00.0: acr: init failed, -5
[ 0.484466] nouveau 0000:01:00.0: init failed with -5
[ 0.484468] nouveau: DRM-master:00000000:00000080: init failed with -5
[ 0.484470] nouveau 0000:01:00.0: DRM-master: Device allocation failed: -5
[ 0.485078] nouveau 0000:01:00.0: probe with driver nouveau failed with error -50

I tried tracking it down but ran out of time this week, will revisit next week.

Reported-by: Dan Moulding <dan@danm.net>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/nouveau/nvkm/core/firmware.c | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)

--- a/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
+++ b/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
@@ -205,9 +205,7 @@ nvkm_firmware_dtor(struct nvkm_firmware
break;
case NVKM_FIRMWARE_IMG_DMA:
nvkm_memory_unref(&memory);
- dma_unmap_single(fw->device->dev, fw->phys, sg_dma_len(&fw->mem.sgl),
- DMA_TO_DEVICE);
- kfree(fw->img);
+ dma_free_coherent(fw->device->dev, sg_dma_len(&fw->mem.sgl), fw->img, fw->phys);
break;
case NVKM_FIRMWARE_IMG_SGT:
nvkm_memory_unref(&memory);
@@ -237,17 +235,14 @@ nvkm_firmware_ctor(const struct nvkm_fir
fw->img = kmemdup(src, fw->len, GFP_KERNEL);
break;
case NVKM_FIRMWARE_IMG_DMA: {
+ dma_addr_t addr;
+
len = ALIGN(fw->len, PAGE_SIZE);

- fw->img = kmalloc(len, GFP_KERNEL);
- if (!fw->img)
- return -ENOMEM;
-
- memcpy(fw->img, src, fw->len);
- fw->phys = dma_map_single(fw->device->dev, fw->img, len, DMA_TO_DEVICE);
- if (dma_mapping_error(fw->device->dev, fw->phys)) {
- kfree(fw->img);
- return -EFAULT;
+ fw->img = dma_alloc_coherent(fw->device->dev, len, &addr, GFP_KERNEL);
+ if (fw->img) {
+ memcpy(fw->img, src, fw->len);
+ fw->phys = addr;
}

sg_init_one(&fw->mem.sgl, fw->img, len);