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TOMOYO Linux Cross Reference
Linux/include/linux/host1x.h

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  1 /*
  2  * Copyright (c) 2009-2013, NVIDIA Corporation. All rights reserved.
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License as published by
  6  * the Free Software Foundation; either version 2 of the License, or
  7  * (at your option) any later version.
  8  *
  9  * This program is distributed in the hope that it will be useful, but WITHOUT
 10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 12  * more details.
 13  *
 14  * You should have received a copy of the GNU General Public License along
 15  * with this program; if not, write to the Free Software Foundation, Inc.,
 16  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 17  */
 18 
 19 #ifndef __LINUX_HOST1X_H
 20 #define __LINUX_HOST1X_H
 21 
 22 #include <linux/device.h>
 23 #include <linux/types.h>
 24 
 25 enum host1x_class {
 26         HOST1X_CLASS_HOST1X = 0x1,
 27         HOST1X_CLASS_GR2D = 0x51,
 28         HOST1X_CLASS_GR2D_SB = 0x52,
 29         HOST1X_CLASS_VIC = 0x5D,
 30         HOST1X_CLASS_GR3D = 0x60,
 31 };
 32 
 33 struct host1x_client;
 34 
 35 /**
 36  * struct host1x_client_ops - host1x client operations
 37  * @init: host1x client initialization code
 38  * @exit: host1x client tear down code
 39  */
 40 struct host1x_client_ops {
 41         int (*init)(struct host1x_client *client);
 42         int (*exit)(struct host1x_client *client);
 43 };
 44 
 45 /**
 46  * struct host1x_client - host1x client structure
 47  * @list: list node for the host1x client
 48  * @parent: pointer to struct device representing the host1x controller
 49  * @dev: pointer to struct device backing this host1x client
 50  * @ops: host1x client operations
 51  * @class: host1x class represented by this client
 52  * @channel: host1x channel associated with this client
 53  * @syncpts: array of syncpoints requested for this client
 54  * @num_syncpts: number of syncpoints requested for this client
 55  */
 56 struct host1x_client {
 57         struct list_head list;
 58         struct device *parent;
 59         struct device *dev;
 60 
 61         const struct host1x_client_ops *ops;
 62 
 63         enum host1x_class class;
 64         struct host1x_channel *channel;
 65 
 66         struct host1x_syncpt **syncpts;
 67         unsigned int num_syncpts;
 68 };
 69 
 70 /*
 71  * host1x buffer objects
 72  */
 73 
 74 struct host1x_bo;
 75 struct sg_table;
 76 
 77 struct host1x_bo_ops {
 78         struct host1x_bo *(*get)(struct host1x_bo *bo);
 79         void (*put)(struct host1x_bo *bo);
 80         dma_addr_t (*pin)(struct host1x_bo *bo, struct sg_table **sgt);
 81         void (*unpin)(struct host1x_bo *bo, struct sg_table *sgt);
 82         void *(*mmap)(struct host1x_bo *bo);
 83         void (*munmap)(struct host1x_bo *bo, void *addr);
 84         void *(*kmap)(struct host1x_bo *bo, unsigned int pagenum);
 85         void (*kunmap)(struct host1x_bo *bo, unsigned int pagenum, void *addr);
 86 };
 87 
 88 struct host1x_bo {
 89         const struct host1x_bo_ops *ops;
 90 };
 91 
 92 static inline void host1x_bo_init(struct host1x_bo *bo,
 93                                   const struct host1x_bo_ops *ops)
 94 {
 95         bo->ops = ops;
 96 }
 97 
 98 static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo)
 99 {
100         return bo->ops->get(bo);
101 }
102 
103 static inline void host1x_bo_put(struct host1x_bo *bo)
104 {
105         bo->ops->put(bo);
106 }
107 
108 static inline dma_addr_t host1x_bo_pin(struct host1x_bo *bo,
109                                        struct sg_table **sgt)
110 {
111         return bo->ops->pin(bo, sgt);
112 }
113 
114 static inline void host1x_bo_unpin(struct host1x_bo *bo, struct sg_table *sgt)
115 {
116         bo->ops->unpin(bo, sgt);
117 }
118 
119 static inline void *host1x_bo_mmap(struct host1x_bo *bo)
120 {
121         return bo->ops->mmap(bo);
122 }
123 
124 static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr)
125 {
126         bo->ops->munmap(bo, addr);
127 }
128 
129 static inline void *host1x_bo_kmap(struct host1x_bo *bo, unsigned int pagenum)
130 {
131         return bo->ops->kmap(bo, pagenum);
132 }
133 
134 static inline void host1x_bo_kunmap(struct host1x_bo *bo,
135                                     unsigned int pagenum, void *addr)
136 {
137         bo->ops->kunmap(bo, pagenum, addr);
138 }
139 
140 /*
141  * host1x syncpoints
142  */
143 
144 #define HOST1X_SYNCPT_CLIENT_MANAGED    (1 << 0)
145 #define HOST1X_SYNCPT_HAS_BASE          (1 << 1)
146 
147 struct host1x_syncpt_base;
148 struct host1x_syncpt;
149 struct host1x;
150 
151 struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id);
152 u32 host1x_syncpt_id(struct host1x_syncpt *sp);
153 u32 host1x_syncpt_read_min(struct host1x_syncpt *sp);
154 u32 host1x_syncpt_read_max(struct host1x_syncpt *sp);
155 u32 host1x_syncpt_read(struct host1x_syncpt *sp);
156 int host1x_syncpt_incr(struct host1x_syncpt *sp);
157 u32 host1x_syncpt_incr_max(struct host1x_syncpt *sp, u32 incrs);
158 int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout,
159                        u32 *value);
160 struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client,
161                                             unsigned long flags);
162 void host1x_syncpt_free(struct host1x_syncpt *sp);
163 
164 struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp);
165 u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);
166 
167 /*
168  * host1x channel
169  */
170 
171 struct host1x_channel;
172 struct host1x_job;
173 
174 struct host1x_channel *host1x_channel_request(struct device *dev);
175 struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
176 void host1x_channel_put(struct host1x_channel *channel);
177 int host1x_job_submit(struct host1x_job *job);
178 
179 /*
180  * host1x job
181  */
182 
183 struct host1x_reloc {
184         struct {
185                 struct host1x_bo *bo;
186                 unsigned long offset;
187         } cmdbuf;
188         struct {
189                 struct host1x_bo *bo;
190                 unsigned long offset;
191         } target;
192         unsigned long shift;
193 };
194 
195 struct host1x_waitchk {
196         struct host1x_bo *bo;
197         u32 offset;
198         u32 syncpt_id;
199         u32 thresh;
200 };
201 
202 struct host1x_job {
203         /* When refcount goes to zero, job can be freed */
204         struct kref ref;
205 
206         /* List entry */
207         struct list_head list;
208 
209         /* Channel where job is submitted to */
210         struct host1x_channel *channel;
211 
212         u32 client;
213 
214         /* Gathers and their memory */
215         struct host1x_job_gather *gathers;
216         unsigned int num_gathers;
217 
218         /* Wait checks to be processed at submit time */
219         struct host1x_waitchk *waitchk;
220         unsigned int num_waitchk;
221         u32 waitchk_mask;
222 
223         /* Array of handles to be pinned & unpinned */
224         struct host1x_reloc *relocarray;
225         unsigned int num_relocs;
226         struct host1x_job_unpin_data *unpins;
227         unsigned int num_unpins;
228 
229         dma_addr_t *addr_phys;
230         dma_addr_t *gather_addr_phys;
231         dma_addr_t *reloc_addr_phys;
232 
233         /* Sync point id, number of increments and end related to the submit */
234         u32 syncpt_id;
235         u32 syncpt_incrs;
236         u32 syncpt_end;
237 
238         /* Maximum time to wait for this job */
239         unsigned int timeout;
240 
241         /* Index and number of slots used in the push buffer */
242         unsigned int first_get;
243         unsigned int num_slots;
244 
245         /* Copy of gathers */
246         size_t gather_copy_size;
247         dma_addr_t gather_copy;
248         u8 *gather_copy_mapped;
249 
250         /* Check if register is marked as an address reg */
251         int (*is_addr_reg)(struct device *dev, u32 class, u32 reg);
252 
253         /* Check if class belongs to the unit */
254         int (*is_valid_class)(u32 class);
255 
256         /* Request a SETCLASS to this class */
257         u32 class;
258 
259         /* Add a channel wait for previous ops to complete */
260         bool serialize;
261 };
262 
263 struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
264                                     u32 num_cmdbufs, u32 num_relocs,
265                                     u32 num_waitchks);
266 void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *mem_id,
267                            u32 words, u32 offset);
268 struct host1x_job *host1x_job_get(struct host1x_job *job);
269 void host1x_job_put(struct host1x_job *job);
270 int host1x_job_pin(struct host1x_job *job, struct device *dev);
271 void host1x_job_unpin(struct host1x_job *job);
272 
273 /*
274  * subdevice probe infrastructure
275  */
276 
277 struct host1x_device;
278 
279 /**
280  * struct host1x_driver - host1x logical device driver
281  * @driver: core driver
282  * @subdevs: table of OF device IDs matching subdevices for this driver
283  * @list: list node for the driver
284  * @probe: called when the host1x logical device is probed
285  * @remove: called when the host1x logical device is removed
286  * @shutdown: called when the host1x logical device is shut down
287  */
288 struct host1x_driver {
289         struct device_driver driver;
290 
291         const struct of_device_id *subdevs;
292         struct list_head list;
293 
294         int (*probe)(struct host1x_device *device);
295         int (*remove)(struct host1x_device *device);
296         void (*shutdown)(struct host1x_device *device);
297 };
298 
299 static inline struct host1x_driver *
300 to_host1x_driver(struct device_driver *driver)
301 {
302         return container_of(driver, struct host1x_driver, driver);
303 }
304 
305 int host1x_driver_register_full(struct host1x_driver *driver,
306                                 struct module *owner);
307 void host1x_driver_unregister(struct host1x_driver *driver);
308 
309 #define host1x_driver_register(driver) \
310         host1x_driver_register_full(driver, THIS_MODULE)
311 
312 struct host1x_device {
313         struct host1x_driver *driver;
314         struct list_head list;
315         struct device dev;
316 
317         struct mutex subdevs_lock;
318         struct list_head subdevs;
319         struct list_head active;
320 
321         struct mutex clients_lock;
322         struct list_head clients;
323 
324         bool registered;
325 };
326 
327 static inline struct host1x_device *to_host1x_device(struct device *dev)
328 {
329         return container_of(dev, struct host1x_device, dev);
330 }
331 
332 int host1x_device_init(struct host1x_device *device);
333 int host1x_device_exit(struct host1x_device *device);
334 
335 int host1x_client_register(struct host1x_client *client);
336 int host1x_client_unregister(struct host1x_client *client);
337 
338 struct tegra_mipi_device;
339 
340 struct tegra_mipi_device *tegra_mipi_request(struct device *device);
341 void tegra_mipi_free(struct tegra_mipi_device *device);
342 int tegra_mipi_enable(struct tegra_mipi_device *device);
343 int tegra_mipi_disable(struct tegra_mipi_device *device);
344 int tegra_mipi_calibrate(struct tegra_mipi_device *device);
345 
346 #endif
347 

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