1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (c) 2009-2013, NVIDIA Corporation. All rights reserved.
4 */
5
6 #ifndef __LINUX_HOST1X_H
7 #define __LINUX_HOST1X_H
8
9 #include <linux/device.h>
10 #include <linux/dma-direction.h>
11 #include <linux/dma-fence.h>
12 #include <linux/spinlock.h>
13 #include <linux/types.h>
14
15 enum host1x_class {
16 HOST1X_CLASS_HOST1X = 0x1,
17 HOST1X_CLASS_GR2D = 0x51,
18 HOST1X_CLASS_GR2D_SB = 0x52,
19 HOST1X_CLASS_VIC = 0x5D,
20 HOST1X_CLASS_GR3D = 0x60,
21 HOST1X_CLASS_NVDEC = 0xF0,
22 HOST1X_CLASS_NVDEC1 = 0xF5,
23 };
24
25 struct host1x;
26 struct host1x_client;
27 struct iommu_group;
28
29 u64 host1x_get_dma_mask(struct host1x *host1x);
30
31 /**
32 * struct host1x_bo_cache - host1x buffer object cache
33 * @mappings: list of mappings
34 * @lock: synchronizes accesses to the list of mappings
35 *
36 * Note that entries are not periodically evicted from this cache and instead need to be
37 * explicitly released. This is used primarily for DRM/KMS where the cache's reference is
38 * released when the last reference to a buffer object represented by a mapping in this
39 * cache is dropped.
40 */
41 struct host1x_bo_cache {
42 struct list_head mappings;
43 struct mutex lock;
44 };
45
host1x_bo_cache_init(struct host1x_bo_cache * cache)46 static inline void host1x_bo_cache_init(struct host1x_bo_cache *cache)
47 {
48 INIT_LIST_HEAD(&cache->mappings);
49 mutex_init(&cache->lock);
50 }
51
host1x_bo_cache_destroy(struct host1x_bo_cache * cache)52 static inline void host1x_bo_cache_destroy(struct host1x_bo_cache *cache)
53 {
54 /* XXX warn if not empty? */
55 mutex_destroy(&cache->lock);
56 }
57
58 /**
59 * struct host1x_client_ops - host1x client operations
60 * @early_init: host1x client early initialization code
61 * @init: host1x client initialization code
62 * @exit: host1x client tear down code
63 * @late_exit: host1x client late tear down code
64 * @suspend: host1x client suspend code
65 * @resume: host1x client resume code
66 */
67 struct host1x_client_ops {
68 int (*early_init)(struct host1x_client *client);
69 int (*init)(struct host1x_client *client);
70 int (*exit)(struct host1x_client *client);
71 int (*late_exit)(struct host1x_client *client);
72 int (*suspend)(struct host1x_client *client);
73 int (*resume)(struct host1x_client *client);
74 };
75
76 /**
77 * struct host1x_client - host1x client structure
78 * @list: list node for the host1x client
79 * @host: pointer to struct device representing the host1x controller
80 * @dev: pointer to struct device backing this host1x client
81 * @group: IOMMU group that this client is a member of
82 * @ops: host1x client operations
83 * @class: host1x class represented by this client
84 * @channel: host1x channel associated with this client
85 * @syncpts: array of syncpoints requested for this client
86 * @num_syncpts: number of syncpoints requested for this client
87 * @parent: pointer to parent structure
88 * @usecount: reference count for this structure
89 * @lock: mutex for mutually exclusive concurrency
90 * @cache: host1x buffer object cache
91 */
92 struct host1x_client {
93 struct list_head list;
94 struct device *host;
95 struct device *dev;
96 struct iommu_group *group;
97
98 const struct host1x_client_ops *ops;
99
100 enum host1x_class class;
101 struct host1x_channel *channel;
102
103 struct host1x_syncpt **syncpts;
104 unsigned int num_syncpts;
105
106 struct host1x_client *parent;
107 unsigned int usecount;
108 struct mutex lock;
109
110 struct host1x_bo_cache cache;
111 };
112
113 /*
114 * host1x buffer objects
115 */
116
117 struct host1x_bo;
118 struct sg_table;
119
120 struct host1x_bo_mapping {
121 struct kref ref;
122 struct dma_buf_attachment *attach;
123 enum dma_data_direction direction;
124 struct list_head list;
125 struct host1x_bo *bo;
126 struct sg_table *sgt;
127 unsigned int chunks;
128 struct device *dev;
129 dma_addr_t phys;
130 size_t size;
131
132 struct host1x_bo_cache *cache;
133 struct list_head entry;
134 };
135
to_host1x_bo_mapping(struct kref * ref)136 static inline struct host1x_bo_mapping *to_host1x_bo_mapping(struct kref *ref)
137 {
138 return container_of(ref, struct host1x_bo_mapping, ref);
139 }
140
141 struct host1x_bo_ops {
142 struct host1x_bo *(*get)(struct host1x_bo *bo);
143 void (*put)(struct host1x_bo *bo);
144 struct host1x_bo_mapping *(*pin)(struct device *dev, struct host1x_bo *bo,
145 enum dma_data_direction dir);
146 void (*unpin)(struct host1x_bo_mapping *map);
147 void *(*mmap)(struct host1x_bo *bo);
148 void (*munmap)(struct host1x_bo *bo, void *addr);
149 };
150
151 struct host1x_bo {
152 const struct host1x_bo_ops *ops;
153 struct list_head mappings;
154 spinlock_t lock;
155 };
156
host1x_bo_init(struct host1x_bo * bo,const struct host1x_bo_ops * ops)157 static inline void host1x_bo_init(struct host1x_bo *bo,
158 const struct host1x_bo_ops *ops)
159 {
160 INIT_LIST_HEAD(&bo->mappings);
161 spin_lock_init(&bo->lock);
162 bo->ops = ops;
163 }
164
host1x_bo_get(struct host1x_bo * bo)165 static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo)
166 {
167 return bo->ops->get(bo);
168 }
169
host1x_bo_put(struct host1x_bo * bo)170 static inline void host1x_bo_put(struct host1x_bo *bo)
171 {
172 bo->ops->put(bo);
173 }
174
175 struct host1x_bo_mapping *host1x_bo_pin(struct device *dev, struct host1x_bo *bo,
176 enum dma_data_direction dir,
177 struct host1x_bo_cache *cache);
178 void host1x_bo_unpin(struct host1x_bo_mapping *map);
179
host1x_bo_mmap(struct host1x_bo * bo)180 static inline void *host1x_bo_mmap(struct host1x_bo *bo)
181 {
182 return bo->ops->mmap(bo);
183 }
184
host1x_bo_munmap(struct host1x_bo * bo,void * addr)185 static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr)
186 {
187 bo->ops->munmap(bo, addr);
188 }
189
190 /*
191 * host1x syncpoints
192 */
193
194 #define HOST1X_SYNCPT_CLIENT_MANAGED (1 << 0)
195 #define HOST1X_SYNCPT_HAS_BASE (1 << 1)
196
197 struct host1x_syncpt_base;
198 struct host1x_syncpt;
199 struct host1x;
200
201 struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, u32 id);
202 struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, u32 id);
203 struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp);
204 u32 host1x_syncpt_id(struct host1x_syncpt *sp);
205 u32 host1x_syncpt_read_min(struct host1x_syncpt *sp);
206 u32 host1x_syncpt_read_max(struct host1x_syncpt *sp);
207 u32 host1x_syncpt_read(struct host1x_syncpt *sp);
208 int host1x_syncpt_incr(struct host1x_syncpt *sp);
209 u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
210 int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
211 u32 *value);
212 struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client,
213 unsigned long flags);
214 void host1x_syncpt_put(struct host1x_syncpt *sp);
215 struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,
216 unsigned long flags,
217 const char *name);
218
219 struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp);
220 u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);
221
222 void host1x_syncpt_release_vblank_reservation(struct host1x_client *client,
223 u32 syncpt_id);
224
225 struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold,
226 bool timeout);
227 void host1x_fence_cancel(struct dma_fence *fence);
228
229 /*
230 * host1x channel
231 */
232
233 struct host1x_channel;
234 struct host1x_job;
235
236 struct host1x_channel *host1x_channel_request(struct host1x_client *client);
237 struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
238 void host1x_channel_stop(struct host1x_channel *channel);
239 void host1x_channel_put(struct host1x_channel *channel);
240 int host1x_job_submit(struct host1x_job *job);
241
242 /*
243 * host1x job
244 */
245
246 #define HOST1X_RELOC_READ (1 << 0)
247 #define HOST1X_RELOC_WRITE (1 << 1)
248
249 struct host1x_reloc {
250 struct {
251 struct host1x_bo *bo;
252 unsigned long offset;
253 } cmdbuf;
254 struct {
255 struct host1x_bo *bo;
256 unsigned long offset;
257 } target;
258 unsigned long shift;
259 unsigned long flags;
260 };
261
262 struct host1x_job {
263 /* When refcount goes to zero, job can be freed */
264 struct kref ref;
265
266 /* List entry */
267 struct list_head list;
268
269 /* Channel where job is submitted to */
270 struct host1x_channel *channel;
271
272 /* client where the job originated */
273 struct host1x_client *client;
274
275 /* Gathers and their memory */
276 struct host1x_job_cmd *cmds;
277 unsigned int num_cmds;
278
279 /* Array of handles to be pinned & unpinned */
280 struct host1x_reloc *relocs;
281 unsigned int num_relocs;
282 struct host1x_job_unpin_data *unpins;
283 unsigned int num_unpins;
284
285 dma_addr_t *addr_phys;
286 dma_addr_t *gather_addr_phys;
287 dma_addr_t *reloc_addr_phys;
288
289 /* Sync point id, number of increments and end related to the submit */
290 struct host1x_syncpt *syncpt;
291 u32 syncpt_incrs;
292 u32 syncpt_end;
293
294 /* Completion fence for job tracking */
295 struct dma_fence *fence;
296 struct dma_fence_cb fence_cb;
297
298 /* Maximum time to wait for this job */
299 unsigned int timeout;
300
301 /* Job has timed out and should be released */
302 bool cancelled;
303
304 /* Index and number of slots used in the push buffer */
305 unsigned int first_get;
306 unsigned int num_slots;
307
308 /* Copy of gathers */
309 size_t gather_copy_size;
310 dma_addr_t gather_copy;
311 u8 *gather_copy_mapped;
312
313 /* Check if register is marked as an address reg */
314 int (*is_addr_reg)(struct device *dev, u32 class, u32 reg);
315
316 /* Check if class belongs to the unit */
317 int (*is_valid_class)(u32 class);
318
319 /* Request a SETCLASS to this class */
320 u32 class;
321
322 /* Add a channel wait for previous ops to complete */
323 bool serialize;
324
325 /* Fast-forward syncpoint increments on job timeout */
326 bool syncpt_recovery;
327
328 /* Callback called when job is freed */
329 void (*release)(struct host1x_job *job);
330 void *user_data;
331
332 /* Whether host1x-side firewall should be ran for this job or not */
333 bool enable_firewall;
334
335 /* Options for configuring engine data stream ID */
336 /* Context device to use for job */
337 struct host1x_memory_context *memory_context;
338 /* Stream ID to use if context isolation is disabled (!memory_context) */
339 u32 engine_fallback_streamid;
340 /* Engine offset to program stream ID to */
341 u32 engine_streamid_offset;
342 };
343
344 struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
345 u32 num_cmdbufs, u32 num_relocs,
346 bool skip_firewall);
347 void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
348 unsigned int words, unsigned int offset);
349 void host1x_job_add_wait(struct host1x_job *job, u32 id, u32 thresh,
350 bool relative, u32 next_class);
351 struct host1x_job *host1x_job_get(struct host1x_job *job);
352 void host1x_job_put(struct host1x_job *job);
353 int host1x_job_pin(struct host1x_job *job, struct device *dev);
354 void host1x_job_unpin(struct host1x_job *job);
355
356 /*
357 * subdevice probe infrastructure
358 */
359
360 struct host1x_device;
361
362 /**
363 * struct host1x_driver - host1x logical device driver
364 * @driver: core driver
365 * @subdevs: table of OF device IDs matching subdevices for this driver
366 * @list: list node for the driver
367 * @probe: called when the host1x logical device is probed
368 * @remove: called when the host1x logical device is removed
369 * @shutdown: called when the host1x logical device is shut down
370 */
371 struct host1x_driver {
372 struct device_driver driver;
373
374 const struct of_device_id *subdevs;
375 struct list_head list;
376
377 int (*probe)(struct host1x_device *device);
378 int (*remove)(struct host1x_device *device);
379 void (*shutdown)(struct host1x_device *device);
380 };
381
382 static inline struct host1x_driver *
to_host1x_driver(struct device_driver * driver)383 to_host1x_driver(struct device_driver *driver)
384 {
385 return container_of(driver, struct host1x_driver, driver);
386 }
387
388 int host1x_driver_register_full(struct host1x_driver *driver,
389 struct module *owner);
390 void host1x_driver_unregister(struct host1x_driver *driver);
391
392 #define host1x_driver_register(driver) \
393 host1x_driver_register_full(driver, THIS_MODULE)
394
395 struct host1x_device {
396 struct host1x_driver *driver;
397 struct list_head list;
398 struct device dev;
399
400 struct mutex subdevs_lock;
401 struct list_head subdevs;
402 struct list_head active;
403
404 struct mutex clients_lock;
405 struct list_head clients;
406
407 bool registered;
408
409 struct device_dma_parameters dma_parms;
410 };
411
to_host1x_device(struct device * dev)412 static inline struct host1x_device *to_host1x_device(struct device *dev)
413 {
414 return container_of(dev, struct host1x_device, dev);
415 }
416
417 int host1x_device_init(struct host1x_device *device);
418 int host1x_device_exit(struct host1x_device *device);
419
420 void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key);
421 void host1x_client_exit(struct host1x_client *client);
422
423 #define host1x_client_init(client) \
424 ({ \
425 static struct lock_class_key __key; \
426 __host1x_client_init(client, &__key); \
427 })
428
429 int __host1x_client_register(struct host1x_client *client);
430
431 /*
432 * Note that this wrapper calls __host1x_client_init() for compatibility
433 * with existing callers. Callers that want to separately initialize and
434 * register a host1x client must first initialize using either of the
435 * __host1x_client_init() or host1x_client_init() functions and then use
436 * the low-level __host1x_client_register() function to avoid the client
437 * getting reinitialized.
438 */
439 #define host1x_client_register(client) \
440 ({ \
441 static struct lock_class_key __key; \
442 __host1x_client_init(client, &__key); \
443 __host1x_client_register(client); \
444 })
445
446 void host1x_client_unregister(struct host1x_client *client);
447
448 int host1x_client_suspend(struct host1x_client *client);
449 int host1x_client_resume(struct host1x_client *client);
450
451 struct tegra_mipi_device;
452
453 struct tegra_mipi_device *tegra_mipi_request(struct device *device,
454 struct device_node *np);
455 void tegra_mipi_free(struct tegra_mipi_device *device);
456 int tegra_mipi_enable(struct tegra_mipi_device *device);
457 int tegra_mipi_disable(struct tegra_mipi_device *device);
458 int tegra_mipi_start_calibration(struct tegra_mipi_device *device);
459 int tegra_mipi_finish_calibration(struct tegra_mipi_device *device);
460
461 /* host1x memory contexts */
462
463 struct host1x_memory_context {
464 struct host1x *host;
465
466 refcount_t ref;
467 struct pid *owner;
468
469 struct device dev;
470 u64 dma_mask;
471 u32 stream_id;
472 };
473
474 #ifdef CONFIG_IOMMU_API
475 struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
476 struct device *dev,
477 struct pid *pid);
478 void host1x_memory_context_get(struct host1x_memory_context *cd);
479 void host1x_memory_context_put(struct host1x_memory_context *cd);
480 #else
host1x_memory_context_alloc(struct host1x * host1x,struct device * dev,struct pid * pid)481 static inline struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x,
482 struct device *dev,
483 struct pid *pid)
484 {
485 return NULL;
486 }
487
host1x_memory_context_get(struct host1x_memory_context * cd)488 static inline void host1x_memory_context_get(struct host1x_memory_context *cd)
489 {
490 }
491
host1x_memory_context_put(struct host1x_memory_context * cd)492 static inline void host1x_memory_context_put(struct host1x_memory_context *cd)
493 {
494 }
495 #endif
496
497 #endif
498