From 25d295882a1adfcdaaad85369289677b87c7c8f0 Mon Sep 17 00:00:00 2001 From: Ilia Mirkin Date: Thu, 1 Oct 2015 23:41:21 -0400 Subject: drm/nouveau/bios: fix OF loading Currently OF bios load fails for a few reasons: - checksum failure - bios size too small - no PCIR header - bios length not a multiple of 4 In this change, we resolve all of the above by ignoring any checksum failures (since OF VBIOS tends not to have a checksum), and faking the PCIR data when loading from OF. Signed-off-by: Ilia Mirkin Signed-off-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c | 27 +++++++++++++++-------- 1 file changed, 18 insertions(+), 9 deletions(-) (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c index 792f017525f6..b2557e87afdd 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c @@ -45,7 +45,7 @@ shadow_fetch(struct nvkm_bios *bios, struct shadow *mthd, u32 upto) u32 read = mthd->func->read(data, start, limit - start, bios); bios->size = start + read; } - return bios->size >= limit; + return bios->size >= upto; } static int @@ -55,14 +55,22 @@ shadow_image(struct nvkm_bios *bios, int idx, u32 offset, struct shadow *mthd) struct nvbios_image image; int score = 1; - if (!shadow_fetch(bios, mthd, offset + 0x1000)) { - nvkm_debug(subdev, "%08x: header fetch failed\n", offset); - return 0; - } + if (mthd->func->no_pcir) { + image.base = 0; + image.type = 0; + image.size = mthd->func->size(mthd->data); + image.last = 1; + } else { + if (!shadow_fetch(bios, mthd, offset + 0x1000)) { + nvkm_debug(subdev, "%08x: header fetch failed\n", + offset); + return 0; + } - if (!nvbios_image(bios, idx, &image)) { - nvkm_debug(subdev, "image %d invalid\n", idx); - return 0; + if (!nvbios_image(bios, idx, &image)) { + nvkm_debug(subdev, "image %d invalid\n", idx); + return 0; + } } nvkm_debug(subdev, "%08x: type %02x, %d bytes\n", image.base, image.type, image.size); @@ -74,7 +82,8 @@ shadow_image(struct nvkm_bios *bios, int idx, u32 offset, struct shadow *mthd) switch (image.type) { case 0x00: - if (nvbios_checksum(&bios->data[image.base], image.size)) { + if (!mthd->func->ignore_checksum && + nvbios_checksum(&bios->data[image.base], image.size)) { nvkm_debug(subdev, "%08x: checksum failed\n", image.base); if (mthd->func->rw) -- cgit v1.2.3