From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c | 123 +++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c

(limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c')

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
new file mode 100644
index 000000000..023ddc7c5
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowramin.c
@@ -0,0 +1,123 @@
+/*
+ * 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 nvkm_bios *bios;
+	u32 bar0;
+};
+
+static u32
+pramin_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
+{
+	struct nvkm_device *device = bios->subdev.device;
+	u32 i;
+	if (offset + length <= 0x00100000) {
+		for (i = offset; i < offset + length; i += 4)
+			*(u32 *)&bios->data[i] = nvkm_rd32(device, 0x700000 + i);
+		return length;
+	}
+	return 0;
+}
+
+static void
+pramin_fini(void *data)
+{
+	struct priv *priv = data;
+	if (priv) {
+		struct nvkm_device *device = priv->bios->subdev.device;
+		nvkm_wr32(device, 0x001700, priv->bar0);
+		kfree(priv);
+	}
+}
+
+static void *
+pramin_init(struct nvkm_bios *bios, const char *name)
+{
+	struct nvkm_subdev *subdev = &bios->subdev;
+	struct nvkm_device *device = subdev->device;
+	struct priv *priv = NULL;
+	u64 addr = 0;
+
+	/* PRAMIN always potentially available prior to nv50 */
+	if (device->card_type < NV_50)
+		return NULL;
+
+	/* we can't get the bios image pointer without PDISP */
+	if (device->card_type >= GA100)
+		addr = device->chipset == 0x170; /*XXX: find the fuse reg for this */
+	else
+	if (device->card_type >= GM100)
+		addr = nvkm_rd32(device, 0x021c04);
+	else
+	if (device->card_type >= NV_C0)
+		addr = nvkm_rd32(device, 0x022500);
+	if (addr & 0x00000001) {
+		nvkm_debug(subdev, "... display disabled\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	/* check that the window is enabled and in vram, particularly
+	 * important as we don't want to be touching vram on an
+	 * uninitialised board
+	 */
+	if (device->card_type >= GV100)
+		addr = nvkm_rd32(device, 0x625f04);
+	else
+		addr = nvkm_rd32(device, 0x619f04);
+	if (!(addr & 0x00000008)) {
+		nvkm_debug(subdev, "... not enabled\n");
+		return ERR_PTR(-ENODEV);
+	}
+	if ( (addr & 0x00000003) != 1) {
+		nvkm_debug(subdev, "... not in vram\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	/* some alternate method inherited from xf86-video-nv... */
+	addr = (addr & 0xffffff00) << 8;
+	if (!addr) {
+		addr  = (u64)nvkm_rd32(device, 0x001700) << 16;
+		addr += 0xf0000;
+	}
+
+	/* modify bar0 PRAMIN window to cover the bios image */
+	if (!(priv = kmalloc(sizeof(*priv), GFP_KERNEL))) {
+		nvkm_error(subdev, "... out of memory\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	priv->bios = bios;
+	priv->bar0 = nvkm_rd32(device, 0x001700);
+	nvkm_wr32(device, 0x001700, addr >> 16);
+	return priv;
+}
+
+const struct nvbios_source
+nvbios_ramin = {
+	.name = "PRAMIN",
+	.init = pramin_init,
+	.fini = pramin_fini,
+	.read = pramin_read,
+	.rw = true,
+};
-- 
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