Initial import of the DRM (direct rendering manager).

This is the kernel part necessary for DRI support in X. Disabled for now
because it still has a few bugs, but now I can work on it in tree. Also
requires the requisite bits in X, which are currently under discussion
on how to deal with them with privsep. ported from a combination of the
free and netbsd implementations.

Known bugs:
1) only the first occurence of X in any session will have dri, after
that something prevents it working.
2) if the machine does not have a dri capable card, the kernel panics.
Something's up in one of the probe functions. I haven't been able to
find it though.
3) radeon cards need to be forced to use PCI mode otherwise they get
into an infinite loop.

This is known to at least kinda work with SiS, radeons in pci mode and
intel cards.

ok deraadt, kinda ok art, a few other people had a quick look.

1 files changed, 193 insertions, 0 deletions

diff --git a/sys/dev/pci/drm/drm_memory.c b/sys/dev/pci/drm/drm_memory.c
new file mode 100644
index 00000000000..f018402f189
--- /dev/null
+++ b/sys/dev/pci/drm/drm_memory.c
@@ -0,0 +1,193 @@
+/*-
+ *Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * 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 (including the next
+ * paragraph) 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
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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.
+ *
+ * Authors:
+ *    Rickard E. (Rik) Faith <faith@valinux.com>
+ *    Gareth Hughes <gareth@valinux.com>
+ *
+ */
+
+/** @file drm_memory.c
+ * Wrappers for kernel memory allocation routines, and MTRR management support.
+ *
+ * This file previously implemented a memory consumption tracking system using
+ * the "area" argument for various different types of allocations, but that
+ * has been stripped out for now.
+ */
+
+#include "drmP.h"
+
+#ifndef __OpenBSD__
+MALLOC_DEFINE(M_DRM, "drm", "DRM Data Structures");
+#endif
+
+void drm_mem_init(void)
+{
+#if defined(__NetBSD__) 
+/*
+	malloc_type_attach(M_DRM);
+*/
+#endif
+}
+
+void drm_mem_uninit(void)
+{
+}
+
+void *drm_alloc(size_t size, int area)
+{
+	return malloc(size, M_DRM, M_NOWAIT);
+}
+
+void *drm_calloc(size_t nmemb, size_t size, int area)
+{
+	/* XXX overflow checking */
+	return malloc(size * nmemb, M_DRM, M_NOWAIT | M_ZERO);
+}
+
+void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
+{
+	void *pt;
+
+	pt = malloc(size, M_DRM, M_NOWAIT);
+	if (pt == NULL)
+		return NULL;
+	if (oldpt && oldsize) {
+		memcpy(pt, oldpt, oldsize);
+		free(oldpt, M_DRM);
+	}
+	return pt;
+}
+
+void drm_free(void *pt, size_t size, int area)
+{
+	free(pt, M_DRM);
+}
+
+void *drm_ioremap(drm_device_t *dev, drm_local_map_t *map)
+{
+#ifdef __FreeBSD__
+	return pmap_mapdev(map->offset, map->size);
+#elif defined(__NetBSD__) || defined(__OpenBSD__)
+	int ret;
+	if (!map->bst)
+	map->bst = dev->pa.pa_memt;
+	if ((ret = bus_space_map(map->bst, map->offset, map->size,
+	    BUS_SPACE_MAP_LINEAR, &map->bsh))) {
+		DRM_ERROR("Failed to map offset = 0x%08lx, size = 0x%08lx, type = %d, ret = %d\n", map->offset,
+		    map->size, map->type, ret);
+		return NULL;
+	}
+	DRM_INFO("mapped offset = 0x%08lx, size = 0x%08lx, type = %d\n", map->offset,
+		    map->offset, map->size);
+	return bus_space_vaddr(map->bst, map->bsh);
+#endif
+}
+
+void drm_ioremapfree(drm_local_map_t *map)
+{
+#ifdef __FreeBSD__
+	pmap_unmapdev((vm_offset_t) map->handle, map->size);
+#elif defined(__NetBSD__) || defined(__OpenBSD__)
+	bus_space_unmap(map->bst, map->bsh, map->size);
+#endif
+}
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
+int
+drm_mtrr_add(unsigned long offset, size_t size, int flags)
+{
+#ifndef DRM_NO_MTRR
+	int act;
+	struct mem_range_desc mrdesc;
+
+	mrdesc.mr_base = offset;
+	mrdesc.mr_len = size;
+	mrdesc.mr_flags = flags;
+	act = MEMRANGE_SET_UPDATE;
+	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
+	return mem_range_attr_set(&mrdesc, &act);
+#else
+	return 0;
+#endif
+}
+
+int
+#if defined(__OpenBSD__)
+drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags)
+#else
+drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
+#endif
+{
+#ifndef DRM_NO_MTRR
+	int act;
+	struct mem_range_desc mrdesc;
+
+	mrdesc.mr_base = offset;
+	mrdesc.mr_len = size;
+	mrdesc.mr_flags = flags;
+	act = MEMRANGE_SET_REMOVE;
+	strlcpy(mrdesc.mr_owner, "drm", sizeof(mrdesc.mr_owner));
+	return mem_range_attr_set(&mrdesc, &act);
+#else
+	return 0;
+#endif
+}
+#elif defined(__NetBSD__) 
+int
+drm_mtrr_add(unsigned long offset, size_t size, int flags)
+{
+#ifndef DRM_NO_MTRR
+	struct mtrr mtrrmap;
+	int one = 1;
+
+	DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
+	mtrrmap.base = offset;
+	mtrrmap.len = size;
+	mtrrmap.type = flags;
+	mtrrmap.flags = MTRR_VALID;
+	return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
+#else
+	return 0;
+#endif
+}
+
+int
+drm_mtrr_del(int __unused handle, unsigned long offset, size_t size, int flags)
+{
+#ifndef DRM_NO_MTRR
+	struct mtrr mtrrmap;
+	int one = 1;
+
+	DRM_DEBUG("offset=%lx size=%ld\n", (long)offset, (long)size);
+	mtrrmap.base = offset;
+	mtrrmap.len = size;
+	mtrrmap.type = flags;
+	mtrrmap.flags = 0;
+	return mtrr_set(&mtrrmap, &one, NULL, MTRR_GETSET_KERNEL);
+#else
+	return 0;
+#endif
+}
+#endif