1 files changed, 108 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 000000000000..1d0389c0abef
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowpci.c
@@ -0,0 +1,108 @@
+/*
+ * 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"
+
+struct priv {
+        struct pci_dev *pdev;
+        void __iomem *rom;
+        size_t size;
+};
+
+static u32
+pcirom_read(void *data, u32 offset, u32 length, struct nouveau_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 nouveau_bios *bios, const char *name)
+{
+        struct pci_dev *pdev = nv_device(bios)->pdev;
+        struct priv *priv = NULL;
+        int ret;
+
+        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 nouveau_bios *bios, const char *name)
+{
+        struct pci_dev *pdev = nv_device(bios)->pdev;
+        struct priv *priv;
+        int ret = -ENOMEM;
+
+        if ((priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
+                if (ret = -ENODEV,
+                    (priv->rom = pci_platform_rom(pdev, &priv->size)))
+                        return priv;
+                kfree(priv);
+        }
+
+        return ERR_PTR(ret);
+}
+
+const struct nvbios_source
+nvbios_platform = {
+        .name = "PLATFORM",
+        .init = platform_init,
+        .fini = (void(*)(void *))kfree,
+        .read = pcirom_read,
+        .rw = true,
+};