include/linux/host1x.h

   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         struct device_dma_parameters dma_parms;
 327 };
 328
 329 static inline struct host1x_device *to_host1x_device(struct device *dev)
 330 {
 331         return container_of(dev, struct host1x_device, dev);
 332 }
 333
 334 int host1x_device_init(struct host1x_device *device);
 335 int host1x_device_exit(struct host1x_device *device);
 336
 337 int host1x_client_register(struct host1x_client *client);
 338 int host1x_client_unregister(struct host1x_client *client);
 339
 340 struct tegra_mipi_device;
 341
 342 struct tegra_mipi_device *tegra_mipi_request(struct device *device);
 343 void tegra_mipi_free(struct tegra_mipi_device *device);
 344 int tegra_mipi_enable(struct tegra_mipi_device *device);
 345 int tegra_mipi_disable(struct tegra_mipi_device *device);
 346 int tegra_mipi_calibrate(struct tegra_mipi_device *device);
 347
 348 #endif