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-rw-r--r--nx-X11/extras/drm/linux/drm_memory.h374
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diff --git a/nx-X11/extras/drm/linux/drm_memory.h b/nx-X11/extras/drm/linux/drm_memory.h
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+/**
+ * \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"
+
+/**
+ * Cut down version of drm_memory_debug.h, which used to be called
+ * drm_memory.h.
+ */
+
+/* Need the 4-argument version of vmap(). */
+#if __OS_HAS_AGP && defined(VMAP_4_ARGS)
+
+#include <linux/vmalloc.h>
+
+#ifdef HAVE_PAGE_AGP
+#include <asm/agp.h>
+#else
+# ifdef __powerpc__
+# define PAGE_AGP __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
+# else
+# define PAGE_AGP PAGE_KERNEL
+# endif
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
+#ifndef pte_offset_kernel
+# define pte_offset_kernel(dir, address) pte_offset(dir, address)
+#endif
+#ifndef pte_pfn
+# define pte_pfn(pte) (pte_page(pte) - mem_map)
+#endif
+#ifndef pfn_to_page
+# define pfn_to_page(pfn) (mem_map + (pfn))
+#endif
+#endif
+
+/*
+ * Find the drm_map that covers the range [offset, offset+size).
+ */
+static inline drm_map_t *
+drm_lookup_map (unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ struct list_head *list;
+ drm_map_list_t *r_list;
+ drm_map_t *map;
+
+ list_for_each(list, &dev->maplist->head) {
+ r_list = (drm_map_list_t *) list;
+ map = r_list->map;
+ if (!map)
+ continue;
+ if (map->offset <= offset && (offset + size) <= (map->offset + map->size))
+ return map;
+ }
+ return NULL;
+}
+
+static inline void *
+agp_remap (unsigned long offset, unsigned long size, drm_device_t *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
+
+ for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
+ 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;
+}
+
+static inline unsigned long
+drm_follow_page (void *vaddr)
+{
+ pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
+ pmd_t *pmd = pmd_offset(pgd, (unsigned long) vaddr);
+ pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
+ return pte_pfn(*ptep) << PAGE_SHIFT;
+}
+
+#else /* __OS_HAS_AGP */
+
+static inline drm_map_t *drm_lookup_map(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ return NULL;
+}
+
+static inline void *agp_remap(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ return NULL;
+}
+
+static inline unsigned long drm_follow_page (void *vaddr)
+{
+ return 0;
+}
+
+#endif
+
+static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+#if defined(VMAP_4_ARGS)
+ if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
+ drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+ if (map && map->type == _DRM_AGP)
+ return agp_remap(offset, size, dev);
+ }
+#endif
+
+ return ioremap(offset, size);
+}
+
+static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
+ drm_device_t *dev)
+{
+#if defined(VMAP_4_ARGS)
+ if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
+ drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+ if (map && map->type == _DRM_AGP)
+ return agp_remap(offset, size, dev);
+ }
+#endif
+
+ return ioremap_nocache(offset, size);
+}
+
+static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev)
+{
+#if defined(VMAP_4_ARGS)
+ /*
+ * This is a bit ugly. It would be much cleaner if the DRM API would use separate
+ * routines for handling mappings in the AGP space. Hopefully this can be done in
+ * a future revision of the interface...
+ */
+ if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture
+ && ((unsigned long) pt >= VMALLOC_START && (unsigned long) pt < VMALLOC_END))
+ {
+ unsigned long offset;
+ drm_map_t *map;
+
+ offset = drm_follow_page(pt) | ((unsigned long) pt & ~PAGE_MASK);
+ map = drm_lookup_map(offset, size, dev);
+ if (map && map->type == _DRM_AGP) {
+ vunmap(pt);
+ return;
+ }
+ }
+#endif
+
+ iounmap(pt);
+}
+
+
+#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;
+}
+
+/** 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);
+}
+
+/** Wrapper around drm_ioremap() */
+void *DRM(ioremap)(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ return drm_ioremap(offset, size, dev);
+}
+
+/** Wrapper around drm_ioremap_nocache() */
+void *DRM(ioremap_nocache)(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+ return drm_ioremap_nocache(offset, size, dev);
+}
+
+/** Wrapper around drm_iounmap() */
+void DRM(ioremapfree)(void *pt, unsigned long size, drm_device_t *dev)
+{
+ drm_ioremapfree(pt, size, dev);
+}
+
+#if __OS_HAS_AGP
+/** Wrapper around agp_allocate_memory() */
+DRM_AGP_MEM *DRM(alloc_agp)(int pages, u32 type)
+{
+ return DRM(agp_allocate_memory)(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 */
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