diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c')
-rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c new file mode 100644 index 0000000000..8d9812a51e --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c @@ -0,0 +1,134 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + */ +#include "priv.h" + +#include <core/pci.h> + +struct priv { + struct pci_dev *pdev; + void __iomem *rom; + size_t size; +}; + +static u32 +pcirom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios) +{ + struct priv *priv = data; + if (offset + length <= priv->size) { + memcpy_fromio(bios->data + offset, priv->rom + offset, length); + return length; + } + return 0; +} + +static void +pcirom_fini(void *data) +{ + struct priv *priv = data; + pci_unmap_rom(priv->pdev, priv->rom); + pci_disable_rom(priv->pdev); + kfree(priv); +} + +static void * +pcirom_init(struct nvkm_bios *bios, const char *name) +{ + struct nvkm_device *device = bios->subdev.device; + struct priv *priv = NULL; + struct pci_dev *pdev; + int ret; + + if (device->func->pci) + pdev = device->func->pci(device)->pdev; + else + return ERR_PTR(-ENODEV); + + if (!(ret = pci_enable_rom(pdev))) { + if (ret = -ENOMEM, + (priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { + if (ret = -EFAULT, + (priv->rom = pci_map_rom(pdev, &priv->size))) { + priv->pdev = pdev; + return priv; + } + kfree(priv); + } + pci_disable_rom(pdev); + } + + return ERR_PTR(ret); +} + +const struct nvbios_source +nvbios_pcirom = { + .name = "PCIROM", + .init = pcirom_init, + .fini = pcirom_fini, + .read = pcirom_read, + .rw = true, +}; + +static void * +platform_init(struct nvkm_bios *bios, const char *name) +{ + struct nvkm_device *device = bios->subdev.device; + struct pci_dev *pdev; + struct priv *priv; + int ret = -ENOMEM; + + if (device->func->pci) + pdev = device->func->pci(device)->pdev; + else + return ERR_PTR(-ENODEV); + + if (!pdev->rom || pdev->romlen == 0) + return ERR_PTR(-ENODEV); + + if ((priv = kmalloc(sizeof(*priv), GFP_KERNEL))) { + priv->size = pdev->romlen; + if (ret = -ENODEV, + (priv->rom = ioremap(pdev->rom, pdev->romlen))) + return priv; + kfree(priv); + } + + return ERR_PTR(ret); +} + +static void +platform_fini(void *data) +{ + struct priv *priv = data; + + iounmap(priv->rom); + kfree(priv); +} + +const struct nvbios_source +nvbios_platform = { + .name = "PLATFORM", + .init = platform_init, + .fini = platform_fini, + .read = pcirom_read, + .rw = true, +}; |