drm/nouveau/oldbios: remove shadowing support, use bios subdev's image

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_bios.c

@@ -65,247 +65,6 @@ static bool nv_cksum(const uint8_t *data, unsigned int length)
 	return false;
 }
 
-static int
-score_vbios(struct nvbios *bios, const bool writeable)
-{
-	if (!bios->data || bios->data[0] != 0x55 || bios->data[1] != 0xAA) {
-		NV_TRACEWARN(bios->dev, "... BIOS signature not found\n");
-		return 0;
-	}
-
-	if (nv_cksum(bios->data, bios->data[2] * 512)) {
-		NV_TRACEWARN(bios->dev, "... BIOS checksum invalid\n");
-		/* if a ro image is somewhat bad, it's probably all rubbish */
-		return writeable ? 2 : 1;
-	}
-
-	NV_TRACE(bios->dev, "... appears to be valid\n");
-	return 3;
-}
-
-static void
-bios_shadow_prom(struct nvbios *bios)
-{
-	struct drm_device *dev = bios->dev;
-	struct drm_nouveau_private *dev_priv = dev->dev_private;
-	u32 pcireg, access;
-	u16 pcir;
-	int i;
-
-	/* enable access to rom */
-	if (dev_priv->card_type >= NV_50)
-		pcireg = 0x088050;
-	else
-		pcireg = NV_PBUS_PCI_NV_20;
-	access = nv_mask(dev, pcireg, 0x00000001, 0x00000000);
-
-	/* bail if no rom signature, with a workaround for a PROM reading
-	 * issue on some chipsets.  the first read after a period of
-	 * inactivity returns the wrong result, so retry the first header
-	 * byte a few times before giving up as a workaround
-	 */
-	i = 16;
-	do {
-		if (nv_rd08(dev, NV_PROM_OFFSET + 0) == 0x55)
-			break;
-	} while (i--);
-
-	if (!i || nv_rd08(dev, NV_PROM_OFFSET + 1) != 0xaa)
-		goto out;
-
-	/* additional check (see note below) - read PCI record header */
-	pcir = nv_rd08(dev, NV_PROM_OFFSET + 0x18) |
-	       nv_rd08(dev, NV_PROM_OFFSET + 0x19) << 8;
-	if (nv_rd08(dev, NV_PROM_OFFSET + pcir + 0) != 'P' ||
-	    nv_rd08(dev, NV_PROM_OFFSET + pcir + 1) != 'C' ||
-	    nv_rd08(dev, NV_PROM_OFFSET + pcir + 2) != 'I' ||
-	    nv_rd08(dev, NV_PROM_OFFSET + pcir + 3) != 'R')
-		goto out;
-
-	/* read entire bios image to system memory */
-	bios->length = nv_rd08(dev, NV_PROM_OFFSET + 2) * 512;
-	bios->data = kmalloc(bios->length, GFP_KERNEL);
-	if (bios->data) {
-		for (i = 0; i < bios->length; i++)
-			bios->data[i] = nv_rd08(dev, NV_PROM_OFFSET + i);
-	}
-
-out:
-	/* disable access to rom */
-	nv_wr32(dev, pcireg, access);
-}
-
-static void
-bios_shadow_pramin(struct nvbios *bios)
-{
-	struct drm_device *dev = bios->dev;
-	struct drm_nouveau_private *dev_priv = dev->dev_private;
-	u32 bar0 = 0;
-	int i;
-
-	if (dev_priv->card_type >= NV_50) {
-		u64 addr = (u64)(nv_rd32(dev, 0x619f04) & 0xffffff00) << 8;
-		if (!addr) {
-			addr  = (u64)nv_rd32(dev, 0x001700) << 16;
-			addr += 0xf0000;
-		}
-
-		bar0 = nv_mask(dev, 0x001700, 0xffffffff, addr >> 16);
-	}
-
-	/* bail if no rom signature */
-	if (nv_rd08(dev, NV_PRAMIN_OFFSET + 0) != 0x55 ||
-	    nv_rd08(dev, NV_PRAMIN_OFFSET + 1) != 0xaa)
-		goto out;
-
-	bios->length = nv_rd08(dev, NV_PRAMIN_OFFSET + 2) * 512;
-	bios->data = kmalloc(bios->length, GFP_KERNEL);
-	if (bios->data) {
-		for (i = 0; i < bios->length; i++)
-			bios->data[i] = nv_rd08(dev, NV_PRAMIN_OFFSET + i);
-	}
-
-out:
-	if (dev_priv->card_type >= NV_50)
-		nv_wr32(dev, 0x001700, bar0);
-}
-
-static void
-bios_shadow_pci(struct nvbios *bios)
-{
-	struct pci_dev *pdev = bios->dev->pdev;
-	size_t length;
-
-	if (!pci_enable_rom(pdev)) {
-		void __iomem *rom = pci_map_rom(pdev, &length);
-		if (rom && length) {
-			bios->data = kmalloc(length, GFP_KERNEL);
-			if (bios->data) {
-				memcpy_fromio(bios->data, rom, length);
-				bios->length = length;
-			}
-		}
-		if (rom)
-			pci_unmap_rom(pdev, rom);
-
-		pci_disable_rom(pdev);
-	}
-}
-
-static void
-bios_shadow_acpi(struct nvbios *bios)
-{
-	struct pci_dev *pdev = bios->dev->pdev;
-	int cnt = 65536 / ROM_BIOS_PAGE;
-	int ret;
-
-	if (!nouveau_acpi_rom_supported(pdev))
-		return;
-
-	bios->data = kmalloc(cnt * ROM_BIOS_PAGE, GFP_KERNEL);
-	if (!bios->data)
-		return;
-
-	bios->length = 0;
-	while (cnt--) {
-		ret = nouveau_acpi_get_bios_chunk(bios->data, bios->length,
-						  ROM_BIOS_PAGE);
-		if (ret != ROM_BIOS_PAGE)
-			return;
-
-		bios->length += ROM_BIOS_PAGE;
-	}
-}
-
-struct methods {
-	const char desc[8];
-	void (*shadow)(struct nvbios *);
-	const bool rw;
-	int score;
-	u32 size;
-	u8 *data;
-};
-
-static bool
-bios_shadow(struct drm_device *dev)
-{
-	struct methods shadow_methods[] = {
-		{ "PRAMIN", bios_shadow_pramin, true, 0, 0, NULL },
-		{ "PROM", bios_shadow_prom, false, 0, 0, NULL },
-		{ "ACPI", bios_shadow_acpi, true, 0, 0, NULL },
-		{ "PCIROM", bios_shadow_pci, true, 0, 0, NULL },
-		{}
-	};
-	struct drm_nouveau_private *dev_priv = dev->dev_private;
-	struct nvbios *bios = &dev_priv->vbios;
-	struct methods *mthd, *best;
-	const struct firmware *fw;
-	char fname[32];
-	int ret;
-
-	if (nouveau_vbios) {
-		/* try to match one of the built-in methods */
-		mthd = shadow_methods;
-		do {
-			if (strcasecmp(nouveau_vbios, mthd->desc))
-				continue;
-			NV_INFO(dev, "VBIOS source: %s\n", mthd->desc);
-
-			mthd->shadow(bios);
-			mthd->score = score_vbios(bios, mthd->rw);
-			if (mthd->score)
-				return true;
-		} while ((++mthd)->shadow);
-
-		/* attempt to load firmware image */
-		snprintf(fname, sizeof(fname), "nouveau/%s", nouveau_vbios);
-		ret = request_firmware(&fw, fname, &dev->pdev->dev);
-		if (ret == 0) {
-			bios->length = fw->size;
-			bios->data   = kmemdup(fw->data, fw->size, GFP_KERNEL);
-			release_firmware(fw);
-
-			NV_INFO(dev, "VBIOS image: %s\n", nouveau_vbios);
-			if (score_vbios(bios, 1))
-				return true;
-
-			kfree(bios->data);
-			bios->data = NULL;
-		}
-
-		NV_ERROR(dev, "VBIOS source \'%s\' invalid\n", nouveau_vbios);
-	}
-
-	mthd = shadow_methods;
-	do {
-		NV_TRACE(dev, "Checking %s for VBIOS\n", mthd->desc);
-		mthd->shadow(bios);
-		mthd->score = score_vbios(bios, mthd->rw);
-		mthd->size = bios->length;
-		mthd->data = bios->data;
-		bios->data = NULL;
-	} while (mthd->score != 3 && (++mthd)->shadow);
-
-	mthd = shadow_methods;
-	best = mthd;
-	do {
-		if (mthd->score > best->score) {
-			kfree(best->data);
-			best = mthd;
-		}
-	} while ((++mthd)->shadow);
-
-	if (best->score) {
-		NV_TRACE(dev, "Using VBIOS from %s\n", best->desc);
-		bios->length = best->size;
-		bios->data = best->data;
-		return true;
-	}
-
-	NV_ERROR(dev, "No valid VBIOS image found\n");
-	return false;
-}
-
 struct init_tbl_entry {
 	char *name;
 	uint8_t id;
@@ -6400,7 +6159,7 @@ static bool NVInitVBIOS(struct drm_device *dev)
 	spin_lock_init(&bios->lock);
 	bios->dev = dev;
 
-	return bios_shadow(dev);
+	return _nv_bios(dev, &bios->data, &bios->length);
 }
 
 static int nouveau_parse_vbios_struct(struct drm_device *dev)
@@ -6564,6 +6323,4 @@ nouveau_bios_takedown(struct drm_device *dev)
 
 	nouveau_mxm_fini(dev);
 	nouveau_i2c_fini(dev);
-
-	kfree(dev_priv->vbios.data);
 }

drivers/gpu/drm/nouveau/nouveau_compat.c

@@ -1,6 +1,8 @@
 #include "nouveau_drm.h"
 #include "nouveau_compat.h"
 
+#include <subdev/bios.h>
+
 void *nouveau_newpriv(struct drm_device *);
 
 u8
@@ -38,3 +40,13 @@ _nv_mask(struct drm_device *dev, u32 reg, u32 mask, u32 val)
 	_nv_wr32(dev, reg, (tmp & ~mask) | val);
 	return tmp;
 }
+
+bool
+_nv_bios(struct drm_device *dev, u8 **data, u32 *size)
+{
+	struct nouveau_drm *drm = nouveau_newpriv(dev);
+	struct nouveau_bios *bios = nouveau_bios(drm->device);
+	*data = bios->data;
+	*size = bios->size;
+	return true;
+}

drivers/gpu/drm/nouveau/nouveau_compat.h

@@ -7,4 +7,6 @@ u32  _nv_rd32(struct drm_device *, u32);
 void _nv_wr32(struct drm_device *, u32, u32);
 u32  _nv_mask(struct drm_device *, u32, u32, u32);
 
+bool _nv_bios(struct drm_device *, u8 **, u32 *);
+
 #endif

drivers/gpu/drm/nouveau/nouveau_drv.c

@@ -44,10 +44,6 @@ MODULE_PARM_DESC(modeset, "Enable kernel modesetting");
 int nouveau_modeset = -1;
 module_param_named(modeset, nouveau_modeset, int, 0400);
 
-MODULE_PARM_DESC(vbios, "Override default VBIOS location");
-char *nouveau_vbios;
-module_param_named(vbios, nouveau_vbios, charp, 0400);
-
 MODULE_PARM_DESC(vram_pushbuf, "Force DMA push buffers to be in VRAM");
 int nouveau_vram_pushbuf;
 module_param_named(vram_pushbuf, nouveau_vram_pushbuf, int, 0400);

drivers/gpu/drm/nouveau/nouveau_drv.h

@@ -846,7 +846,6 @@ extern int nouveau_fbpercrtc;
 extern int nouveau_tv_disable;
 extern char *nouveau_tv_norm;
 extern int nouveau_reg_debug;
-extern char *nouveau_vbios;
 extern int nouveau_ignorelid;
 extern int nouveau_nofbaccel;
 extern int nouveau_noaccel;