drm: reorganise drm tree to be more future proof.

With the coming of kernel based modesetting and the memory manager stuff,
the everything in one directory approach was getting very ugly and
starting to be unmanageable.

This restructures the drm along the lines of other kernel components.

It creates a drivers/gpu/drm directory and moves the hw drivers into
subdirectores. It moves the includes into an include/drm, and
sets up the unifdef for the userspace headers we should be exporting.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 181 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
new file mode 100644
index 000000000000..845081b44f63
--- /dev/null
+++ b/drivers/gpu/drm/drm_memory.c
@@ -0,0 +1,181 @@
+/**
+ * \file drm_memory.c
+ * Memory management wrappers for DRM
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/*
+ * Created: Thu Feb  4 14:00:34 1999 by faith@valinux.com
+ *
+ * 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.
+ */
+
+#include <linux/highmem.h>
+#include "drmP.h"
+
+#ifdef DEBUG_MEMORY
+#include "drm_memory_debug.h"
+#else
+
+/** No-op. */
+void drm_mem_init(void)
+{
+}
+
+/**
+ * Called when "/proc/dri/%dev%/mem" is read.
+ *
+ * \param buf output buffer.
+ * \param start start of output data.
+ * \param offset requested start offset.
+ * \param len requested number of bytes.
+ * \param eof whether there is no more data to return.
+ * \param data private data.
+ * \return number of written bytes.
+ *
+ * No-op.
+ */
+int drm_mem_info(char *buf, char **start, off_t offset,
+                 int len, int *eof, void *data)
+{
+        return 0;
+}
+
+/** Wrapper around kmalloc() and kfree() */
+void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
+{
+        void *pt;
+
+        if (!(pt = kmalloc(size, GFP_KERNEL)))
+                return NULL;
+        if (oldpt && oldsize) {
+                memcpy(pt, oldpt, oldsize);
+                kfree(oldpt);
+        }
+        return pt;
+}
+
+#if __OS_HAS_AGP
+static void *agp_remap(unsigned long offset, unsigned long size,
+                       struct drm_device * dev)
+{
+        unsigned long *phys_addr_map, i, num_pages =
+            PAGE_ALIGN(size) / PAGE_SIZE;
+        struct drm_agp_mem *agpmem;
+        struct page **page_map;
+        void *addr;
+
+        size = PAGE_ALIGN(size);
+
+#ifdef __alpha__
+        offset -= dev->hose->mem_space->start;
+#endif
+
+        list_for_each_entry(agpmem, &dev->agp->memory, head)
+                if (agpmem->bound <= offset
+                    && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >=
+                    (offset + size))
+                        break;
+        if (!agpmem)
+                return NULL;
+
+        /*
+         * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
+         * the CPU do not get remapped by the GART.  We fix this by using the kernel's
+         * page-table instead (that's probably faster anyhow...).
+         */
+        /* note: use vmalloc() because num_pages could be large... */
+        page_map = vmalloc(num_pages * sizeof(struct page *));
+        if (!page_map)
+                return NULL;
+
+        phys_addr_map =
+            agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
+        for (i = 0; i < num_pages; ++i)
+                page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
+        addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
+        vfree(page_map);
+
+        return addr;
+}
+
+/** Wrapper around agp_allocate_memory() */
+DRM_AGP_MEM *drm_alloc_agp(struct drm_device * dev, int pages, u32 type)
+{
+        return drm_agp_allocate_memory(dev->agp->bridge, pages, type);
+}
+
+/** Wrapper around agp_free_memory() */
+int drm_free_agp(DRM_AGP_MEM * handle, int pages)
+{
+        return drm_agp_free_memory(handle) ? 0 : -EINVAL;
+}
+
+/** Wrapper around agp_bind_memory() */
+int drm_bind_agp(DRM_AGP_MEM * handle, unsigned int start)
+{
+        return drm_agp_bind_memory(handle, start);
+}
+
+/** Wrapper around agp_unbind_memory() */
+int drm_unbind_agp(DRM_AGP_MEM * handle)
+{
+        return drm_agp_unbind_memory(handle);
+}
+
+#else  /*  __OS_HAS_AGP  */
+static inline void *agp_remap(unsigned long offset, unsigned long size,
+                              struct drm_device * dev)
+{
+        return NULL;
+}
+
+#endif                          /* agp */
+
+#endif                          /* debug_memory */
+
+void drm_core_ioremap(struct drm_map *map, struct drm_device *dev)
+{
+        if (drm_core_has_AGP(dev) &&
+            dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+                map->handle = agp_remap(map->offset, map->size, dev);
+        else
+                map->handle = ioremap(map->offset, map->size);
+}
+EXPORT_SYMBOL(drm_core_ioremap);
+
+void drm_core_ioremapfree(struct drm_map *map, struct drm_device *dev)
+{
+        if (!map->handle || !map->size)
+                return;
+
+        if (drm_core_has_AGP(dev) &&
+            dev->agp && dev->agp->cant_use_aperture && map->type == _DRM_AGP)
+                vunmap(map->handle);
+        else
+                iounmap(map->handle);
+}
+EXPORT_SYMBOL(drm_core_ioremapfree);