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path: root/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c
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Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c134
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 000000000..8d9812a51
--- /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,
+};