Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 2 | * Legacy: Generic DRM Contexts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. |
| 5 | * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. |
| 6 | * All Rights Reserved. |
| 7 | * |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 8 | * Author: Rickard E. (Rik) Faith <faith@valinux.com> |
| 9 | * Author: Gareth Hughes <gareth@valinux.com> |
| 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 12 | * copy of this software and associated documentation files (the "Software"), |
| 13 | * to deal in the Software without restriction, including without limitation |
| 14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 15 | * and/or sell copies of the Software, and to permit persons to whom the |
| 16 | * Software is furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice (including the next |
| 19 | * paragraph) shall be included in all copies or substantial portions of the |
| 20 | * Software. |
| 21 | * |
| 22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 25 | * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| 26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| 27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| 28 | * OTHER DEALINGS IN THE SOFTWARE. |
| 29 | */ |
| 30 | |
David Howells | 760285e | 2012-10-02 18:01:07 +0100 | [diff] [blame] | 31 | #include <drm/drmP.h> |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 32 | #include "drm_legacy.h" |
| 33 | |
| 34 | struct drm_ctx_list { |
| 35 | struct list_head head; |
| 36 | drm_context_t handle; |
| 37 | struct drm_file *tag; |
| 38 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
Dave Airlie | c21eb21 | 2013-09-20 08:32:59 +1000 | [diff] [blame] | 40 | /******************************************************************/ |
| 41 | /** \name Context bitmap support */ |
| 42 | /*@{*/ |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /** |
| 45 | * Free a handle from the context bitmap. |
| 46 | * |
| 47 | * \param dev DRM device. |
| 48 | * \param ctx_handle context handle. |
| 49 | * |
| 50 | * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 51 | * in drm_device::ctx_idr, while holding the drm_device::struct_mutex |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | * lock. |
| 53 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 54 | void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 56 | mutex_lock(&dev->struct_mutex); |
| 57 | idr_remove(&dev->ctx_idr, ctx_handle); |
| 58 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | } |
| 60 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 61 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | * Context bitmap allocation. |
| 63 | * |
| 64 | * \param dev DRM device. |
| 65 | * \return (non-negative) context handle on success or a negative number on failure. |
| 66 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 67 | * Allocate a new idr from drm_device::ctx_idr while holding the |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 68 | * drm_device::struct_mutex lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 70 | static int drm_legacy_ctxbitmap_next(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 72 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 74 | mutex_lock(&dev->struct_mutex); |
Tejun Heo | 2e92881 | 2013-02-27 17:04:08 -0800 | [diff] [blame] | 75 | ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0, |
| 76 | GFP_KERNEL); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 77 | mutex_unlock(&dev->struct_mutex); |
Tejun Heo | 2e92881 | 2013-02-27 17:04:08 -0800 | [diff] [blame] | 78 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Context bitmap initialization. |
| 83 | * |
| 84 | * \param dev DRM device. |
| 85 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 86 | * Initialise the drm_device::ctx_idr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 88 | int drm_legacy_ctxbitmap_init(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | { |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 90 | idr_init(&dev->ctx_idr); |
Dave Airlie | c21eb21 | 2013-09-20 08:32:59 +1000 | [diff] [blame] | 91 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Context bitmap cleanup. |
| 96 | * |
| 97 | * \param dev DRM device. |
| 98 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 99 | * Free all idr members using drm_ctx_sarea_free helper function |
| 100 | * while holding the drm_device::struct_mutex lock. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 102 | void drm_legacy_ctxbitmap_cleanup(struct drm_device * dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 104 | mutex_lock(&dev->struct_mutex); |
Tejun Heo | 4d53233 | 2013-02-27 17:03:39 -0800 | [diff] [blame] | 105 | idr_destroy(&dev->ctx_idr); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 106 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | |
David Herrmann | 9f8d21e | 2014-07-23 09:01:12 +0200 | [diff] [blame] | 109 | /** |
| 110 | * drm_ctxbitmap_flush() - Flush all contexts owned by a file |
| 111 | * @dev: DRM device to operate on |
| 112 | * @file: Open file to flush contexts for |
| 113 | * |
| 114 | * This iterates over all contexts on @dev and drops them if they're owned by |
| 115 | * @file. Note that after this call returns, new contexts might be added if |
| 116 | * the file is still alive. |
| 117 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 118 | void drm_legacy_ctxbitmap_flush(struct drm_device *dev, struct drm_file *file) |
David Herrmann | 9f8d21e | 2014-07-23 09:01:12 +0200 | [diff] [blame] | 119 | { |
| 120 | struct drm_ctx_list *pos, *tmp; |
| 121 | |
| 122 | mutex_lock(&dev->ctxlist_mutex); |
| 123 | |
| 124 | list_for_each_entry_safe(pos, tmp, &dev->ctxlist, head) { |
| 125 | if (pos->tag == file && |
| 126 | pos->handle != DRM_KERNEL_CONTEXT) { |
| 127 | if (dev->driver->context_dtor) |
| 128 | dev->driver->context_dtor(dev, pos->handle); |
| 129 | |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 130 | drm_legacy_ctxbitmap_free(dev, pos->handle); |
David Herrmann | 9f8d21e | 2014-07-23 09:01:12 +0200 | [diff] [blame] | 131 | list_del(&pos->head); |
| 132 | kfree(pos); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | mutex_unlock(&dev->ctxlist_mutex); |
| 137 | } |
| 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | /*@}*/ |
| 140 | |
| 141 | /******************************************************************/ |
| 142 | /** \name Per Context SAREA Support */ |
| 143 | /*@{*/ |
| 144 | |
| 145 | /** |
| 146 | * Get per-context SAREA. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 147 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 149 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | * \param cmd command. |
| 151 | * \param arg user argument pointing to a drm_ctx_priv_map structure. |
| 152 | * \return zero on success or a negative number on failure. |
| 153 | * |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 154 | * Gets the map from drm_device::ctx_idr with the handle specified and |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | * returns its handle. |
| 156 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 157 | int drm_legacy_getsareactx(struct drm_device *dev, void *data, |
| 158 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 160 | struct drm_ctx_priv_map *request = data; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 161 | struct drm_local_map *map; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 162 | struct drm_map_list *_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 164 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 165 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 166 | map = idr_find(&dev->ctx_idr, request->ctx_id); |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 167 | if (!map) { |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 168 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | return -EINVAL; |
| 170 | } |
| 171 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 172 | request->handle = NULL; |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 173 | list_for_each_entry(_entry, &dev->maplist, head) { |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 174 | if (_entry->map == map) { |
Dave Airlie | bc5f452 | 2007-11-05 12:50:58 +1000 | [diff] [blame] | 175 | request->handle = |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 176 | (void *)(unsigned long)_entry->user_token; |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 177 | break; |
| 178 | } |
| 179 | } |
Ilija Hadzic | 09b4ea4 | 2011-10-28 17:43:28 -0400 | [diff] [blame] | 180 | |
| 181 | mutex_unlock(&dev->struct_mutex); |
| 182 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 183 | if (request->handle == NULL) |
Dave Airlie | d1f2b55 | 2005-08-05 22:11:22 +1000 | [diff] [blame] | 184 | return -EINVAL; |
| 185 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Set per-context SAREA. |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 191 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 193 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | * \param cmd command. |
| 195 | * \param arg user argument pointing to a drm_ctx_priv_map structure. |
| 196 | * \return zero on success or a negative number on failure. |
| 197 | * |
| 198 | * Searches the mapping specified in \p arg and update the entry in |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 199 | * drm_device::ctx_idr with it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 201 | int drm_legacy_setsareactx(struct drm_device *dev, void *data, |
| 202 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 204 | struct drm_ctx_priv_map *request = data; |
Benjamin Herrenschmidt | f77d390 | 2009-02-02 16:55:46 +1100 | [diff] [blame] | 205 | struct drm_local_map *map = NULL; |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 206 | struct drm_map_list *r_list = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 208 | mutex_lock(&dev->struct_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 209 | list_for_each_entry(r_list, &dev->maplist, head) { |
Dave Airlie | 9a18664 | 2005-06-23 21:29:18 +1000 | [diff] [blame] | 210 | if (r_list->map |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 211 | && r_list->user_token == (unsigned long) request->handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | goto found; |
| 213 | } |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 214 | bad: |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 215 | mutex_unlock(&dev->struct_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | return -EINVAL; |
| 217 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 218 | found: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | map = r_list->map; |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 220 | if (!map) |
| 221 | goto bad; |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 222 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 223 | if (IS_ERR(idr_replace(&dev->ctx_idr, map, request->ctx_id))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | goto bad; |
Dave Airlie | 6296814 | 2007-07-17 10:46:52 +1000 | [diff] [blame] | 225 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 226 | mutex_unlock(&dev->struct_mutex); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return 0; |
| 229 | } |
| 230 | |
| 231 | /*@}*/ |
| 232 | |
| 233 | /******************************************************************/ |
| 234 | /** \name The actual DRM context handling routines */ |
| 235 | /*@{*/ |
| 236 | |
| 237 | /** |
| 238 | * Switch context. |
| 239 | * |
| 240 | * \param dev DRM device. |
| 241 | * \param old old context handle. |
| 242 | * \param new new context handle. |
| 243 | * \return zero on success or a negative number on failure. |
| 244 | * |
| 245 | * Attempt to set drm_device::context_flag. |
| 246 | */ |
Dave Airlie | 84b1fd1 | 2007-07-11 15:53:27 +1000 | [diff] [blame] | 247 | static int drm_context_switch(struct drm_device * dev, int old, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 249 | if (test_and_set_bit(0, &dev->context_flag)) { |
| 250 | DRM_ERROR("Reentering -- FIXME\n"); |
| 251 | return -EBUSY; |
| 252 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 254 | DRM_DEBUG("Context switch from %d to %d\n", old, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 256 | if (new == dev->last_context) { |
| 257 | clear_bit(0, &dev->context_flag); |
| 258 | return 0; |
| 259 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 261 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /** |
| 265 | * Complete context switch. |
| 266 | * |
| 267 | * \param dev DRM device. |
| 268 | * \param new new context handle. |
| 269 | * \return zero on success or a negative number on failure. |
| 270 | * |
| 271 | * Updates drm_device::last_context and drm_device::last_switch. Verifies the |
| 272 | * hardware lock is held, clears the drm_device::context_flag and wakes up |
| 273 | * drm_device::context_wait. |
| 274 | */ |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 275 | static int drm_context_switch_complete(struct drm_device *dev, |
| 276 | struct drm_file *file_priv, int new) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 278 | dev->last_context = new; /* PRE/POST: This is the _only_ writer. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 280 | if (!_DRM_LOCK_IS_HELD(file_priv->master->lock.hw_lock->lock)) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 281 | DRM_ERROR("Lock isn't held after context switch\n"); |
| 282 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 284 | /* If a context switch is ever initiated |
| 285 | when the kernel holds the lock, release |
| 286 | that lock here. */ |
| 287 | clear_bit(0, &dev->context_flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 289 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Reserve contexts. |
| 294 | * |
| 295 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 296 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | * \param cmd command. |
| 298 | * \param arg user argument pointing to a drm_ctx_res structure. |
| 299 | * \return zero on success or a negative number on failure. |
| 300 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 301 | int drm_legacy_resctx(struct drm_device *dev, void *data, |
| 302 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 304 | struct drm_ctx_res *res = data; |
Dave Airlie | c60ce62 | 2007-07-11 15:27:12 +1000 | [diff] [blame] | 305 | struct drm_ctx ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | int i; |
| 307 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 308 | if (res->count >= DRM_RESERVED_CONTEXTS) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 309 | memset(&ctx, 0, sizeof(ctx)); |
| 310 | for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | ctx.handle = i; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 312 | if (copy_to_user(&res->contexts[i], &ctx, sizeof(ctx))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | return -EFAULT; |
| 314 | } |
| 315 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 316 | res->count = DRM_RESERVED_CONTEXTS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * Add context. |
| 323 | * |
| 324 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 325 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | * \param cmd command. |
| 327 | * \param arg user argument pointing to a drm_ctx structure. |
| 328 | * \return zero on success or a negative number on failure. |
| 329 | * |
| 330 | * Get a new handle for the context and copy to userspace. |
| 331 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 332 | int drm_legacy_addctx(struct drm_device *dev, void *data, |
| 333 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 335 | struct drm_ctx_list *ctx_entry; |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 336 | struct drm_ctx *ctx = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 338 | ctx->handle = drm_legacy_ctxbitmap_next(dev); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 339 | if (ctx->handle == DRM_KERNEL_CONTEXT) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 340 | /* Skip kernel's context and get a new one. */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 341 | ctx->handle = drm_legacy_ctxbitmap_next(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 343 | DRM_DEBUG("%d\n", ctx->handle); |
| 344 | if (ctx->handle == -1) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 345 | DRM_DEBUG("Not enough free contexts.\n"); |
| 346 | /* Should this return -EBUSY instead? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | return -ENOMEM; |
| 348 | } |
| 349 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 350 | ctx_entry = kmalloc(sizeof(*ctx_entry), GFP_KERNEL); |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 351 | if (!ctx_entry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | DRM_DEBUG("out of memory\n"); |
| 353 | return -ENOMEM; |
| 354 | } |
| 355 | |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 356 | INIT_LIST_HEAD(&ctx_entry->head); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 357 | ctx_entry->handle = ctx->handle; |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 358 | ctx_entry->tag = file_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 360 | mutex_lock(&dev->ctxlist_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 361 | list_add(&ctx_entry->head, &dev->ctxlist); |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 362 | mutex_unlock(&dev->ctxlist_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | return 0; |
| 365 | } |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | /** |
| 368 | * Get context. |
| 369 | * |
| 370 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 371 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | * \param cmd command. |
| 373 | * \param arg user argument pointing to a drm_ctx structure. |
| 374 | * \return zero on success or a negative number on failure. |
| 375 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 376 | int drm_legacy_getctx(struct drm_device *dev, void *data, |
| 377 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 379 | struct drm_ctx *ctx = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | /* This is 0, because we don't handle any context flags */ |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 382 | ctx->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * Switch context. |
| 389 | * |
| 390 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 391 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | * \param cmd command. |
| 393 | * \param arg user argument pointing to a drm_ctx structure. |
| 394 | * \return zero on success or a negative number on failure. |
| 395 | * |
| 396 | * Calls context_switch(). |
| 397 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 398 | int drm_legacy_switchctx(struct drm_device *dev, void *data, |
| 399 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 401 | struct drm_ctx *ctx = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 403 | DRM_DEBUG("%d\n", ctx->handle); |
| 404 | return drm_context_switch(dev, dev->last_context, ctx->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | /** |
| 408 | * New context. |
| 409 | * |
| 410 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 411 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | * \param cmd command. |
| 413 | * \param arg user argument pointing to a drm_ctx structure. |
| 414 | * \return zero on success or a negative number on failure. |
| 415 | * |
| 416 | * Calls context_switch_complete(). |
| 417 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 418 | int drm_legacy_newctx(struct drm_device *dev, void *data, |
| 419 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 421 | struct drm_ctx *ctx = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 423 | DRM_DEBUG("%d\n", ctx->handle); |
Dave Airlie | 7c1c287 | 2008-11-28 14:22:24 +1000 | [diff] [blame] | 424 | drm_context_switch_complete(dev, file_priv, ctx->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
| 426 | return 0; |
| 427 | } |
| 428 | |
| 429 | /** |
| 430 | * Remove context. |
| 431 | * |
| 432 | * \param inode device inode. |
Eric Anholt | 6c340ea | 2007-08-25 20:23:09 +1000 | [diff] [blame] | 433 | * \param file_priv DRM file private. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | * \param cmd command. |
| 435 | * \param arg user argument pointing to a drm_ctx structure. |
| 436 | * \return zero on success or a negative number on failure. |
| 437 | * |
| 438 | * If not the special kernel context, calls ctxbitmap_free() to free the specified context. |
| 439 | */ |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 440 | int drm_legacy_rmctx(struct drm_device *dev, void *data, |
| 441 | struct drm_file *file_priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 443 | struct drm_ctx *ctx = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 445 | DRM_DEBUG("%d\n", ctx->handle); |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 446 | if (ctx->handle != DRM_KERNEL_CONTEXT) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | if (dev->driver->context_dtor) |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 448 | dev->driver->context_dtor(dev, ctx->handle); |
David Herrmann | e7b96070 | 2014-07-24 12:10:04 +0200 | [diff] [blame] | 449 | drm_legacy_ctxbitmap_free(dev, ctx->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | } |
| 451 | |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 452 | mutex_lock(&dev->ctxlist_mutex); |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 453 | if (!list_empty(&dev->ctxlist)) { |
Dave Airlie | 5591051 | 2007-07-11 16:53:40 +1000 | [diff] [blame] | 454 | struct drm_ctx_list *pos, *n; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | |
Dave Airlie | bd1b331 | 2007-05-26 05:01:51 +1000 | [diff] [blame] | 456 | list_for_each_entry_safe(pos, n, &dev->ctxlist, head) { |
Eric Anholt | c153f45 | 2007-09-03 12:06:45 +1000 | [diff] [blame] | 457 | if (pos->handle == ctx->handle) { |
Dave Airlie | b5e89ed | 2005-09-25 14:28:13 +1000 | [diff] [blame] | 458 | list_del(&pos->head); |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 459 | kfree(pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | } |
| 461 | } |
| 462 | } |
Dave Airlie | 30e2fb1 | 2006-02-02 19:37:46 +1100 | [diff] [blame] | 463 | mutex_unlock(&dev->ctxlist_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
| 465 | return 0; |
| 466 | } |
| 467 | |
| 468 | /*@}*/ |