1 files changed, 181 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_memory.c b/drivers/char/drm/drm_memory.c
new file mode 100644
index 000000000000..7f53f756c052
--- /dev/null
+++ b/drivers/char/drm/drm_memory.c
@@ -0,0 +1,181 @@
+/** 
+ * \file drm_memory.h 
+ * 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/config.h>
+#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() */
+void *drm_calloc(size_t nmemb, size_t size, int area)
+{
+        void *addr;
+
+        addr = kmalloc(size * nmemb, GFP_KERNEL);
+        if (addr != NULL)
+                memset((void *)addr, 0, size * nmemb);
+
+        return addr;
+}
+EXPORT_SYMBOL(drm_calloc);
+
+/** 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;
+}
+
+/**
+ * Allocate pages.
+ *
+ * \param order size order.
+ * \param area memory area. (Not used.)
+ * \return page address on success, or zero on failure.
+ *
+ * Allocate and reserve free pages.
+ */
+unsigned long drm_alloc_pages(int order, int area)
+{
+        unsigned long address;
+        unsigned long bytes       = PAGE_SIZE << order;
+        unsigned long addr;
+        unsigned int  sz;
+
+        address = __get_free_pages(GFP_KERNEL, order);
+        if (!address) 
+                return 0;
+
+                                /* Zero */
+        memset((void *)address, 0, bytes);
+
+                                /* Reserve */
+        for (addr = address, sz = bytes;
+             sz > 0;
+             addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+                SetPageReserved(virt_to_page(addr));
+        }
+
+        return address;
+}
+
+/**
+ * Free pages.
+ * 
+ * \param address address of the pages to free.
+ * \param order size order.
+ * \param area memory area. (Not used.)
+ *
+ * Unreserve and free pages allocated by alloc_pages().
+ */
+void drm_free_pages(unsigned long address, int order, int area)
+{
+        unsigned long bytes = PAGE_SIZE << order;
+        unsigned long addr;
+        unsigned int  sz;
+
+        if (!address) 
+                return;
+
+        /* Unreserve */
+        for (addr = address, sz = bytes;
+             sz > 0;
+             addr += PAGE_SIZE, sz -= PAGE_SIZE) {
+                ClearPageReserved(virt_to_page(addr));
+        }
+
+        free_pages(address, order);
+}
+
+
+#if __OS_HAS_AGP
+/** Wrapper around agp_allocate_memory() */
+DRM_AGP_MEM *drm_alloc_agp(struct agp_bridge_data *bridge, int pages, u32 type)
+{
+        return drm_agp_allocate_memory(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);
+}
+#endif /* agp */
+#endif /* debug_memory */