^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Legacy: Generic DRM Buffer Management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Author: Rickard E. (Rik) Faith <faith@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Author: Gareth Hughes <gareth@valinux.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Permission is hereby granted, free of charge, to any person obtaining a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * copy of this software and associated documentation files (the "Software"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * to deal in the Software without restriction, including without limitation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * the rights to use, copy, modify, merge, publish, distribute, sublicense,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * and/or sell copies of the Software, and to permit persons to whom the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * Software is furnished to do so, subject to the following conditions:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * The above copyright notice and this permission notice (including the next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * paragraph) shall be included in all copies or substantial portions of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Software.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * OTHER DEALINGS IN THE SOFTWARE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/export.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/log2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/nospec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/shmparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <drm/drm_agpsupport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <drm/drm_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <drm/drm_drv.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <drm/drm_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <drm/drm_print.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include "drm_legacy.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct drm_local_map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct drm_map_list *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) list_for_each_entry(entry, &dev->maplist, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * Because the kernel-userspace ABI is fixed at a 32-bit offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * while PCI resources may live above that, we only compare the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * lower 32 bits of the map offset for maps of type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * _DRM_FRAMEBUFFER or _DRM_REGISTERS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * It is assumed that if a driver have more than one resource
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * of each type, the lower 32 bits are different.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!entry->map ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) map->type != entry->map->type ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) entry->master != dev->master)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) switch (map->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) case _DRM_SHM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (map->flags != _DRM_CONTAINS_LOCK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) case _DRM_REGISTERS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case _DRM_FRAME_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if ((entry->map->offset & 0xffffffff) ==
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) (map->offset & 0xffffffff))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) default: /* Make gcc happy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (entry->map->offset == map->offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned long user_token, int hashed_handle, int shm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int use_hashed_handle, shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long add;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #if (BITS_PER_LONG == 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #elif (BITS_PER_LONG == 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) use_hashed_handle = hashed_handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #error Unsupported long size. Neither 64 nor 32 bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!use_hashed_handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) hash->key = user_token >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) ret = drm_ht_insert_item(&dev->map_hash, hash);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (ret != -EINVAL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) shift = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (shm && (SHMLBA > PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /* For shared memory, we have to preserve the SHMLBA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * bits of the eventual vma->vm_pgoff value during
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * mmap(). Otherwise we run into cache aliasing problems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * on some platforms. On these platforms, the pgoff of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * a mmap() request is used to pick a suitable virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * address for the mmap() region such that it will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * cause cache aliasing problems.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * Therefore, make sure the SHMLBA relevant bits of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * hash value we use are equal to those in the original
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * kernel virtual address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) shift = bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return drm_ht_just_insert_please(&dev->map_hash, hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) user_token, 32 - PAGE_SHIFT - 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) shift, add);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * Core function to create a range of memory available for mapping by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * non-root process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * Adjusts the memory offset to its absolute value according to the mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * applicable and if supported by the kernel.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) unsigned int size, enum drm_map_type type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) enum drm_map_flags flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct drm_map_list **maplist)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct drm_local_map *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct drm_map_list *list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) unsigned long user_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) map = kmalloc(sizeof(*map), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (!map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) map->offset = offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) map->size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) map->flags = flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) map->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* Only allow shared memory to be removable since we only keep enough
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * book keeping information about shared memory to allow for removal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) * when processes fork.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) (unsigned long long)map->offset, map->size, map->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* page-align _DRM_SHM maps. They are allocated here so there is no security
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * hole created by that and it works around various broken drivers that use
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * a non-aligned quantity to map the SAREA. --BenH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (map->type == _DRM_SHM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) map->size = PAGE_ALIGN(map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) map->mtrr = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) map->handle = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) switch (map->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) case _DRM_REGISTERS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) case _DRM_FRAME_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) #if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (map->offset + (map->size-1) < map->offset ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) map->offset < virt_to_phys(high_memory)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* Some drivers preinitialize some maps, without the X Server
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * needing to be aware of it. Therefore, we just return success
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * when the server tries to create a duplicate map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) list = drm_find_matching_map(dev, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (list != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (list->map->size != map->size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) DRM_DEBUG("Matching maps of type %d with "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) "mismatched sizes, (%ld vs %ld)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) map->type, map->size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) list->map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) list->map->size = map->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) *maplist = list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (map->type == _DRM_FRAME_BUFFER ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) (map->flags & _DRM_WRITE_COMBINING)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) map->mtrr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) arch_phys_wc_add(map->offset, map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (map->type == _DRM_REGISTERS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (map->flags & _DRM_WRITE_COMBINING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) map->handle = ioremap_wc(map->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) map->handle = ioremap(map->offset, map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) if (!map->handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) case _DRM_SHM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) list = drm_find_matching_map(dev, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (list != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if (list->map->size != map->size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) DRM_DEBUG("Matching maps of type %d with "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) "mismatched sizes, (%ld vs %ld)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) map->type, map->size, list->map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) list->map->size = map->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) *maplist = list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) map->handle = vmalloc_user(map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) DRM_DEBUG("%lu %d %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) map->size, order_base_2(map->size), map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (!map->handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) map->offset = (unsigned long)map->handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (map->flags & _DRM_CONTAINS_LOCK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* Prevent a 2nd X Server from creating a 2nd lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (dev->master->lock.hw_lock != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) vfree(map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) dev->sigdata.lock = dev->master->lock.hw_lock = map->handle; /* Pointer to lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) case _DRM_AGP: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct drm_agp_mem *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) int valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (!dev->agp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) #ifdef __alpha__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) map->offset += dev->hose->mem_space->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /* In some cases (i810 driver), user space may have already
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * added the AGP base itself, because dev->agp->base previously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * only got set during AGP enable. So, only add the base
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * address if the map's offset isn't already within the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * aperture.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (map->offset < dev->agp->base ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) map->offset > dev->agp->base +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) dev->agp->agp_info.aper_size * 1024 * 1024 - 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) map->offset += dev->agp->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) map->mtrr = dev->agp->agp_mtrr; /* for getmap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) /* This assumes the DRM is in total control of AGP space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * It's not always the case as AGP can be in the control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * of user space (i.e. i810 driver). So this loop will get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * skipped and we double check that dev->agp->memory is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * actually set as well as being invalid before EPERM'ing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) list_for_each_entry(entry, &dev->agp->memory, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) if ((map->offset >= entry->bound) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (!list_empty(&dev->agp->memory) && !valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) (unsigned long long)map->offset, map->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) case _DRM_SCATTER_GATHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (!dev->sg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) map->offset += (unsigned long)dev->sg->virtual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) case _DRM_CONSISTENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) /* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) * As we're limiting the address to 2^32-1 (or less),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * casting it down to 32 bits is no problem, but we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * need to point to a 64bit variable first. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) map->handle = dma_alloc_coherent(&dev->pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) map->size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) &map->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (!map->handle) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) list = kzalloc(sizeof(*list), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (!list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (map->type == _DRM_REGISTERS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) iounmap(map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) list->map = map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) list_add(&list->head, &dev->maplist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) /* Assign a 32-bit handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) /* We do it here so that dev->struct_mutex protects the increment */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) map->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) ret = drm_map_handle(dev, &list->hash, user_token, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) (map->type == _DRM_SHM));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (map->type == _DRM_REGISTERS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) iounmap(map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) kfree(list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) list->user_token = list->hash.key << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (!(map->flags & _DRM_DRIVER))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) list->master = dev->master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) *maplist = list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) unsigned int size, enum drm_map_type type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) enum drm_map_flags flags, struct drm_local_map **map_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct drm_map_list *list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) rc = drm_addmap_core(dev, offset, size, type, flags, &list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) if (!rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) *map_ptr = list->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) EXPORT_SYMBOL(drm_legacy_addmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) unsigned int token)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct drm_map_list *_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) list_for_each_entry(_entry, &dev->maplist, head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) if (_entry->user_token == token)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) return _entry->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) EXPORT_SYMBOL(drm_legacy_findmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * Ioctl to specify a range of memory that is available for mapping by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * non-root process.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) * \param arg pointer to a drm_map structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * \return zero on success or a negative value on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) struct drm_map *map = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) struct drm_map_list *maplist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) err = drm_addmap_core(dev, map->offset, map->size, map->type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) map->flags, &maplist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) /* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) map->handle = (void *)(unsigned long)maplist->user_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * It appears that there are no users of this value whatsoever --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * drmAddMap just discards it. Let's not encourage its use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) * (Keeping drm_addmap_core's returned mtrr value would be wrong --
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * it's not a real mtrr index anymore.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) map->mtrr = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * Get a mapping information.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) * \param arg user argument, pointing to a drm_map structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) * Searches for the mapping with the specified offset and copies its information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) * into userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) struct drm_map *map = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) struct drm_map_list *r_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) struct list_head *list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) idx = map->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) if (idx < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) list_for_each(list, &dev->maplist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) if (i == idx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) r_list = list_entry(list, struct drm_map_list, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) if (!r_list || !r_list->map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) map->offset = r_list->map->offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) map->size = r_list->map->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) map->type = r_list->map->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) map->flags = r_list->map->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) map->handle = (void *)(unsigned long) r_list->user_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) map->mtrr = arch_phys_wc_index(r_list->map->mtrr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * Remove a map private from list and deallocate resources if the mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * isn't in use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) * Searches the map on drm_device::maplist, removes it from the list, see if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * it's being used, and free any associated resource (such as MTRR's) if it's not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * being on use.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * \sa drm_legacy_addmap
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) struct drm_map_list *r_list = NULL, *list_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) int found = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) struct drm_master *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /* Find the list entry for the map and remove it */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) if (r_list->map == map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) master = r_list->master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) list_del(&r_list->head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) drm_ht_remove_key(&dev->map_hash,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) r_list->user_token >> PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) kfree(r_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) found = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) if (!found)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) switch (map->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) case _DRM_REGISTERS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) iounmap(map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) case _DRM_FRAME_BUFFER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) arch_phys_wc_del(map->mtrr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) case _DRM_SHM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) vfree(map->handle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (master) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (dev->sigdata.lock == master->lock.hw_lock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) dev->sigdata.lock = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) master->lock.hw_lock = NULL; /* SHM removed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) master->lock.file_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) wake_up_interruptible_all(&master->lock.lock_queue);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) case _DRM_AGP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) case _DRM_SCATTER_GATHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) case _DRM_CONSISTENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) dma_free_coherent(&dev->pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) map->size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) map->handle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) map->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) kfree(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) EXPORT_SYMBOL(drm_legacy_rmmap_locked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) drm_legacy_rmmap_locked(dev, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) EXPORT_SYMBOL(drm_legacy_rmmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct drm_map_list *r_list, *list_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) if (r_list->master == master) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) drm_legacy_rmmap_locked(dev, r_list->map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) r_list = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) void drm_legacy_rmmaps(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct drm_map_list *r_list, *list_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) drm_legacy_rmmap(dev, r_list->map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) /* The rmmap ioctl appears to be unnecessary. All mappings are torn down on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) * the last close of the device, and this is necessary for cleanup when things
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) * exit uncleanly. Therefore, having userland manually remove mappings seems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * like a pointless exercise since they're going away anyway.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) * One use case might be after addmap is allowed for normal users for SHM and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) * gets used by drivers that the server doesn't need to care about. This seems
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) * unlikely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * \param arg pointer to a struct drm_map structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) * \return zero on success or a negative value on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) struct drm_map *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) struct drm_local_map *map = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) struct drm_map_list *r_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) !drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) list_for_each_entry(r_list, &dev->maplist, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) if (r_list->map &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) r_list->user_token == (unsigned long)request->handle &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) r_list->map->flags & _DRM_REMOVABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) map = r_list->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /* List has wrapped around to the head pointer, or it's empty we didn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) * find anything.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (list_empty(&dev->maplist) || !map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /* Register and framebuffer maps are permanent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) ret = drm_legacy_rmmap_locked(dev, map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * Cleanup after an error on one of the addbufs() functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) * \param dev DRM device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) * \param entry buffer entry where the error occurred.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) * Frees any pages and buffers associated with the given entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) static void drm_cleanup_buf_error(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) struct drm_buf_entry *entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (entry->seg_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) for (i = 0; i < entry->seg_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (entry->seglist[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) drm_pci_free(dev, entry->seglist[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) kfree(entry->seglist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) entry->seg_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) if (entry->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) for (i = 0; i < entry->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) kfree(entry->buflist[i].dev_private);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) kfree(entry->buflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) entry->buf_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) #if IS_ENABLED(CONFIG_AGP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) * Add AGP buffers for DMA transfers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * \param dev struct drm_device to which the buffers are to be added.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * \param request pointer to a struct drm_buf_desc describing the request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * After some sanity checks creates a drm_buf structure for each buffer and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * reallocates the buffer list of the same size order to accommodate the new
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * buffers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) int drm_legacy_addbufs_agp(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct drm_buf_desc *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) struct drm_buf_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) struct drm_agp_mem *agp_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct drm_buf *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) unsigned long agp_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) int order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) int alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) int page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) int total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) int byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) int i, valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) struct drm_buf **temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) count = request->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) order = order_base_2(request->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) size = 1 << order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) alignment = (request->flags & _DRM_PAGE_ALIGN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) ? PAGE_ALIGN(size) : size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) total = PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) byte_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) agp_offset = dev->agp->base + request->agp_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) DRM_DEBUG("count: %d\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) DRM_DEBUG("order: %d\n", order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) DRM_DEBUG("size: %d\n", size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) DRM_DEBUG("agp_offset: %lx\n", agp_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) DRM_DEBUG("alignment: %d\n", alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) DRM_DEBUG("page_order: %d\n", page_order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) DRM_DEBUG("total: %d\n", total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) /* Make sure buffers are located in AGP memory that we own */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) valid = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) list_for_each_entry(agp_entry, &dev->agp->memory, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if ((agp_offset >= agp_entry->bound) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (!list_empty(&dev->agp->memory) && !valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) DRM_DEBUG("zone invalid\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) spin_lock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) if (dev->buf_use) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) atomic_inc(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) entry = &dma->bufs[order];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (entry->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) return -ENOMEM; /* May only call once for each order */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) if (count < 0 || count > 4096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) if (!entry->buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) entry->buf_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) entry->page_order = page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) while (entry->buf_count < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) buf = &entry->buflist[entry->buf_count];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) buf->idx = dma->buf_count + entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) buf->total = alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) buf->order = order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) buf->used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) buf->offset = (dma->byte_count + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) buf->bus_address = agp_offset + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) buf->address = (void *)(agp_offset + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) buf->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) buf->waiting = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) buf->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) buf->file_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) buf->dev_priv_size = dev->driver->dev_priv_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) if (!buf->dev_private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) /* Set count correctly so we free the proper amount. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) entry->buf_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) offset += alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) entry->buf_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) byte_count += PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) DRM_DEBUG("byte_count: %d\n", byte_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) temp_buflist = krealloc(dma->buflist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) (dma->buf_count + entry->buf_count) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) sizeof(*dma->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (!temp_buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) /* Free the entry because it isn't valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) dma->buflist = temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) for (i = 0; i < entry->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) dma->buflist[i + dma->buf_count] = &entry->buflist[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) dma->buf_count += entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) dma->seg_count += entry->seg_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) dma->page_count += byte_count >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) dma->byte_count += byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) request->count = entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) request->size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) dma->flags = _DRM_DMA_USE_AGP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) EXPORT_SYMBOL(drm_legacy_addbufs_agp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) #endif /* CONFIG_AGP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) int drm_legacy_addbufs_pci(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) struct drm_buf_desc *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) int order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) int total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) int page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) struct drm_buf_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) drm_dma_handle_t *dmah;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) struct drm_buf *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) int alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) int byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) int page_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) unsigned long *temp_pagelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct drm_buf **temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) count = request->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) order = order_base_2(request->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) size = 1 << order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) DRM_DEBUG("count=%d, size=%d (%d), order=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) request->count, request->size, size, order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) alignment = (request->flags & _DRM_PAGE_ALIGN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) ? PAGE_ALIGN(size) : size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) total = PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) spin_lock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) if (dev->buf_use) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) atomic_inc(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) entry = &dma->bufs[order];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (entry->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) return -ENOMEM; /* May only call once for each order */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) if (count < 0 || count > 4096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) if (!entry->buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) entry->seglist = kcalloc(count, sizeof(*entry->seglist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (!entry->seglist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) kfree(entry->buflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) /* Keep the original pagelist until we know all the allocations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) * have succeeded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) temp_pagelist = kmalloc_array(dma->page_count + (count << page_order),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) sizeof(*dma->pagelist),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) if (!temp_pagelist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) kfree(entry->buflist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) kfree(entry->seglist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) memcpy(temp_pagelist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) dma->pagelist, dma->page_count * sizeof(*dma->pagelist));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) DRM_DEBUG("pagelist: %d entries\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) dma->page_count + (count << page_order));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) entry->buf_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) entry->page_order = page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) byte_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) page_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) while (entry->buf_count < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) dmah = drm_pci_alloc(dev, PAGE_SIZE << page_order, 0x1000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) if (!dmah) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) /* Set count correctly so we free the proper amount. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) entry->buf_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) entry->seg_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) kfree(temp_pagelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) entry->seglist[entry->seg_count++] = dmah;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) for (i = 0; i < (1 << page_order); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) DRM_DEBUG("page %d @ 0x%08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) dma->page_count + page_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) (unsigned long)dmah->vaddr + PAGE_SIZE * i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) temp_pagelist[dma->page_count + page_count++]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) = (unsigned long)dmah->vaddr + PAGE_SIZE * i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) for (offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) offset + size <= total && entry->buf_count < count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) offset += alignment, ++entry->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) buf = &entry->buflist[entry->buf_count];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) buf->idx = dma->buf_count + entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) buf->total = alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) buf->order = order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) buf->used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) buf->offset = (dma->byte_count + byte_count + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) buf->address = (void *)(dmah->vaddr + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) buf->bus_address = dmah->busaddr + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) buf->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) buf->waiting = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) buf->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) buf->file_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) buf->dev_priv_size = dev->driver->dev_priv_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) buf->dev_private = kzalloc(buf->dev_priv_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (!buf->dev_private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) /* Set count correctly so we free the proper amount. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) entry->buf_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) entry->seg_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) kfree(temp_pagelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) DRM_DEBUG("buffer %d @ %p\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) entry->buf_count, buf->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) byte_count += PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) temp_buflist = krealloc(dma->buflist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) (dma->buf_count + entry->buf_count) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) sizeof(*dma->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) if (!temp_buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) /* Free the entry because it isn't valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) kfree(temp_pagelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) dma->buflist = temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) for (i = 0; i < entry->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) dma->buflist[i + dma->buf_count] = &entry->buflist[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) /* No allocations failed, so now we can replace the original pagelist
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) * with the new one.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) if (dma->page_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) kfree(dma->pagelist);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) dma->pagelist = temp_pagelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) dma->buf_count += entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) dma->seg_count += entry->seg_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) dma->page_count += entry->seg_count << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) request->count = entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) request->size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) if (request->flags & _DRM_PCI_BUFFER_RO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) dma->flags = _DRM_DMA_USE_PCI_RO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) EXPORT_SYMBOL(drm_legacy_addbufs_pci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) static int drm_legacy_addbufs_sg(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) struct drm_buf_desc *request)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) struct drm_buf_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) struct drm_buf *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) unsigned long agp_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) int order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) int size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) int alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) int page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) int total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) int byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) struct drm_buf **temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) if (!drm_core_check_feature(dev, DRIVER_SG))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) if (!capable(CAP_SYS_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) count = request->count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) order = order_base_2(request->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) size = 1 << order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) alignment = (request->flags & _DRM_PAGE_ALIGN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) ? PAGE_ALIGN(size) : size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) total = PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) byte_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) agp_offset = request->agp_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) DRM_DEBUG("count: %d\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) DRM_DEBUG("order: %d\n", order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) DRM_DEBUG("size: %d\n", size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) DRM_DEBUG("agp_offset: %lu\n", agp_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) DRM_DEBUG("alignment: %d\n", alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) DRM_DEBUG("page_order: %d\n", page_order);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) DRM_DEBUG("total: %d\n", total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) spin_lock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) if (dev->buf_use) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) atomic_inc(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) mutex_lock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) entry = &dma->bufs[order];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) if (entry->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) return -ENOMEM; /* May only call once for each order */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) if (count < 0 || count > 4096) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) if (!entry->buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) entry->buf_size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) entry->page_order = page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) while (entry->buf_count < count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) buf = &entry->buflist[entry->buf_count];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) buf->idx = dma->buf_count + entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) buf->total = alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) buf->order = order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) buf->used = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) buf->offset = (dma->byte_count + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) buf->bus_address = agp_offset + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) buf->address = (void *)(agp_offset + offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) + (unsigned long)dev->sg->virtual);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) buf->next = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) buf->waiting = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) buf->pending = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) buf->file_priv = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) buf->dev_priv_size = dev->driver->dev_priv_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) if (!buf->dev_private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) /* Set count correctly so we free the proper amount. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) entry->buf_count = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) offset += alignment;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) entry->buf_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) byte_count += PAGE_SIZE << page_order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) DRM_DEBUG("byte_count: %d\n", byte_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) temp_buflist = krealloc(dma->buflist,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) (dma->buf_count + entry->buf_count) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) sizeof(*dma->buflist), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) if (!temp_buflist) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) /* Free the entry because it isn't valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) drm_cleanup_buf_error(dev, entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) dma->buflist = temp_buflist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) for (i = 0; i < entry->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) dma->buflist[i + dma->buf_count] = &entry->buflist[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) dma->buf_count += entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) dma->seg_count += entry->seg_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) dma->page_count += byte_count >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) dma->byte_count += byte_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) mutex_unlock(&dev->struct_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) request->count = entry->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) request->size = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) dma->flags = _DRM_DMA_USE_SG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) atomic_dec(&dev->buf_alloc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) * Add buffers for DMA transfers (ioctl).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) * \param arg pointer to a struct drm_buf_desc request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) * According with the memory type specified in drm_buf_desc::flags and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) * build options, it dispatches the call either to addbufs_agp(),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) * PCI memory respectively.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) int drm_legacy_addbufs(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) struct drm_buf_desc *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) #if IS_ENABLED(CONFIG_AGP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) if (request->flags & _DRM_AGP_BUFFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) ret = drm_legacy_addbufs_agp(dev, request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) if (request->flags & _DRM_SG_BUFFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) ret = drm_legacy_addbufs_sg(dev, request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) else if (request->flags & _DRM_FB_BUFFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) ret = drm_legacy_addbufs_pci(dev, request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) * Get information about the buffer mappings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) * This was originally mean for debugging purposes, or by a sophisticated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) * client library to determine how best to use the available buffers (e.g.,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) * large buffers can be used for image transfer).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) * \param arg pointer to a drm_buf_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) * Increments drm_device::buf_use while holding the drm_device::buf_lock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) * lock, preventing of allocating more buffers after this call. Information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) * about each requested buffer is then copied into user space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) int __drm_legacy_infobufs(struct drm_device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) void *data, int *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) int (*f)(void *, int, struct drm_buf_entry *))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) int count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) spin_lock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) if (atomic_read(&dev->buf_alloc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) ++dev->buf_use; /* Can't allocate more after this call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) if (dma->bufs[i].buf_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) ++count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) DRM_DEBUG("count = %d\n", count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) if (*p >= count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) struct drm_buf_entry *from = &dma->bufs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) if (from->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) if (f(data, count, from) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) DRM_DEBUG("%d %d %d %d %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) i,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) dma->bufs[i].buf_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) dma->bufs[i].buf_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) dma->bufs[i].low_mark,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) dma->bufs[i].high_mark);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) ++count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) *p = count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) static int copy_one_buf(void *data, int count, struct drm_buf_entry *from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) struct drm_buf_info *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) struct drm_buf_desc __user *to = &request->list[count];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) struct drm_buf_desc v = {.count = from->buf_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) .size = from->buf_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) .low_mark = from->low_mark,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) .high_mark = from->high_mark};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) if (copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) int drm_legacy_infobufs(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) struct drm_buf_info *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) * Specifies a low and high water mark for buffer allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) * \param arg a pointer to a drm_buf_desc structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) * Verifies that the size order is bounded between the admissible orders and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) * updates the respective drm_device_dma::bufs entry low and high water mark.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) * \note This ioctl is deprecated and mostly never used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) int drm_legacy_markbufs(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) struct drm_buf_desc *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) int order;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) struct drm_buf_entry *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) DRM_DEBUG("%d, %d, %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) request->size, request->low_mark, request->high_mark);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) order = order_base_2(request->size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) entry = &dma->bufs[order];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) if (request->low_mark < 0 || request->low_mark > entry->buf_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) if (request->high_mark < 0 || request->high_mark > entry->buf_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) entry->low_mark = request->low_mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) entry->high_mark = request->high_mark;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) * Unreserve the buffers in list, previously reserved using drmDMA.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) * \param arg pointer to a drm_buf_free structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) * Calls free_buffer() for each used buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) * This function is primarily used for debugging.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) int drm_legacy_freebufs(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) struct drm_buf_free *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) struct drm_buf *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) DRM_DEBUG("%d\n", request->count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) for (i = 0; i < request->count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) if (copy_from_user(&idx, &request->list[i], sizeof(idx)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) if (idx < 0 || idx >= dma->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) DRM_ERROR("Index %d (of %d max)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) idx, dma->buf_count - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) idx = array_index_nospec(idx, dma->buf_count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) buf = dma->buflist[idx];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) if (buf->file_priv != file_priv) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) DRM_ERROR("Process %d freeing buffer not owned\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) task_pid_nr(current));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) drm_legacy_free_buffer(dev, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) * Maps all of the DMA buffers into client-virtual space (ioctl).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) * \param inode device inode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) * \param file_priv DRM file private.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) * \param cmd command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) * \param arg pointer to a drm_buf_map structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) * \return zero on success or a negative number on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) * about each buffer into user space. For PCI buffers, it calls vm_mmap() with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) * drm_mmap_dma().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) void __user **v,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) int (*f)(void *, int, unsigned long,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) struct drm_buf *),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) struct drm_device_dma *dma = dev->dma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) int retcode = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) unsigned long virtual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) if (!dma)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) spin_lock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) if (atomic_read(&dev->buf_alloc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) dev->buf_use++; /* Can't allocate more after this call */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) spin_unlock(&dev->buf_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) if (*p >= dma->buf_count) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) || (drm_core_check_feature(dev, DRIVER_SG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) && (dma->flags & _DRM_DMA_USE_SG))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) struct drm_local_map *map = dev->agp_buffer_map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) unsigned long token = dev->agp_buffer_token;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) if (!map) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) retcode = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) virtual = vm_mmap(file_priv->filp, 0, map->size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) MAP_SHARED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) token);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) PROT_READ | PROT_WRITE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) MAP_SHARED, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) if (virtual > -1024UL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534) /* Real error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) retcode = (signed long)virtual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) *v = (void __user *)virtual;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) for (i = 0; i < dma->buf_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) if (f(data, i, virtual, dma->buflist[i]) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) retcode = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) *p = dma->buf_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) return retcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) static int map_one_buf(void *data, int idx, unsigned long virtual,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) struct drm_buf *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) struct drm_buf_map *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) unsigned long address = virtual + buf->offset; /* *** */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) if (copy_to_user(&request->list[idx].idx, &buf->idx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) sizeof(request->list[0].idx)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) if (copy_to_user(&request->list[idx].total, &buf->total,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) sizeof(request->list[0].total)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) if (clear_user(&request->list[idx].used, sizeof(int)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) if (copy_to_user(&request->list[idx].address, &address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) sizeof(address)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) int drm_legacy_mapbufs(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) struct drm_buf_map *request = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) return __drm_legacy_mapbufs(dev, data, &request->count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) &request->virtual, map_one_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) file_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) int drm_legacy_dma_ioctl(struct drm_device *dev, void *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) struct drm_file *file_priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) if (!drm_core_check_feature(dev, DRIVER_LEGACY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) if (dev->driver->dma_ioctl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) return dev->driver->dma_ioctl(dev, data, file_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) struct drm_map_list *entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) list_for_each_entry(entry, &dev->maplist, head) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) if (entry->map && entry->map->type == _DRM_SHM &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) (entry->map->flags & _DRM_CONTAINS_LOCK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) return entry->map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) EXPORT_SYMBOL(drm_legacy_getsarea);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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