include/linux/host1x.h

   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/types.h>
  11
  12 enum host1x_class {
  13         HOST1X_CLASS_HOST1X = 0x1,
  14         HOST1X_CLASS_GR2D = 0x51,
  15         HOST1X_CLASS_GR2D_SB = 0x52,
  16         HOST1X_CLASS_VIC = 0x5D,
  17         HOST1X_CLASS_GR3D = 0x60,
  18 };
  19
  20 struct host1x;
  21 struct host1x_client;
  22 struct iommu_group;
  23
  24 u64 host1x_get_dma_mask(struct host1x *host1x);
  25
  26 /**
  27  * struct host1x_client_ops - host1x client operations
  28  * @early_init: host1x client early initialization code
  29  * @init: host1x client initialization code
  30  * @exit: host1x client tear down code
  31  * @late_exit: host1x client late tear down code
  32  * @suspend: host1x client suspend code
  33  * @resume: host1x client resume code
  34  */
  35 struct host1x_client_ops {
  36         int (*early_init)(struct host1x_client *client);
  37         int (*init)(struct host1x_client *client);
  38         int (*exit)(struct host1x_client *client);
  39         int (*late_exit)(struct host1x_client *client);
  40         int (*suspend)(struct host1x_client *client);
  41         int (*resume)(struct host1x_client *client);
  42 };
  43
  44 /**
  45  * struct host1x_client - host1x client structure
  46  * @list: list node for the host1x client
  47  * @host: pointer to struct device representing the host1x controller
  48  * @dev: pointer to struct device backing this host1x client
  49  * @group: IOMMU group that this client is a member of
  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  * @parent: pointer to parent structure
  56  * @usecount: reference count for this structure
  57  * @lock: mutex for mutually exclusive concurrency
  58  */
  59 struct host1x_client {
  60         struct list_head list;
  61         struct device *host;
  62         struct device *dev;
  63         struct iommu_group *group;
  64
  65         const struct host1x_client_ops *ops;
  66
  67         enum host1x_class class;
  68         struct host1x_channel *channel;
  69
  70         struct host1x_syncpt **syncpts;
  71         unsigned int num_syncpts;
  72
  73         struct host1x_client *parent;
  74         unsigned int usecount;
  75         struct mutex lock;
  76 };
  77
  78 /*
  79  * host1x buffer objects
  80  */
  81
  82 struct host1x_bo;
  83 struct sg_table;
  84
  85 struct host1x_bo_ops {
  86         struct host1x_bo *(*get)(struct host1x_bo *bo);
  87         void (*put)(struct host1x_bo *bo);
  88         struct sg_table *(*pin)(struct device *dev, struct host1x_bo *bo,
  89                                 dma_addr_t *phys);
  90         void (*unpin)(struct device *dev, struct sg_table *sgt);
  91         void *(*mmap)(struct host1x_bo *bo);
  92         void (*munmap)(struct host1x_bo *bo, void *addr);
  93 };
  94
  95 struct host1x_bo {
  96         const struct host1x_bo_ops *ops;
  97 };
  98
  99 static inline void host1x_bo_init(struct host1x_bo *bo,
 100                                   const struct host1x_bo_ops *ops)
 101 {
 102         bo->ops = ops;
 103 }
 104
 105 static inline struct host1x_bo *host1x_bo_get(struct host1x_bo *bo)
 106 {
 107         return bo->ops->get(bo);
 108 }
 109
 110 static inline void host1x_bo_put(struct host1x_bo *bo)
 111 {
 112         bo->ops->put(bo);
 113 }
 114
 115 static inline struct sg_table *host1x_bo_pin(struct device *dev,
 116                                              struct host1x_bo *bo,
 117                                              dma_addr_t *phys)
 118 {
 119         return bo->ops->pin(dev, bo, phys);
 120 }
 121
 122 static inline void host1x_bo_unpin(struct device *dev, struct host1x_bo *bo,
 123                                    struct sg_table *sgt)
 124 {
 125         bo->ops->unpin(dev, sgt);
 126 }
 127
 128 static inline void *host1x_bo_mmap(struct host1x_bo *bo)
 129 {
 130         return bo->ops->mmap(bo);
 131 }
 132
 133 static inline void host1x_bo_munmap(struct host1x_bo *bo, void *addr)
 134 {
 135         bo->ops->munmap(bo, addr);
 136 }
 137
 138 /*
 139  * host1x syncpoints
 140  */
 141
 142 #define HOST1X_SYNCPT_CLIENT_MANAGED    (1 << 0)
 143 #define HOST1X_SYNCPT_HAS_BASE          (1 << 1)
 144
 145 struct host1x_syncpt_base;
 146 struct host1x_syncpt;
 147 struct host1x;
 148
 149 struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, u32 id);
 150 struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, u32 id);
 151 struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp);
 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_put(struct host1x_syncpt *sp);
 163 struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host,
 164                                           unsigned long flags,
 165                                           const char *name);
 166
 167 struct host1x_syncpt_base *host1x_syncpt_get_base(struct host1x_syncpt *sp);
 168 u32 host1x_syncpt_base_id(struct host1x_syncpt_base *base);
 169
 170 void host1x_syncpt_release_vblank_reservation(struct host1x_client *client,
 171                                               u32 syncpt_id);
 172
 173 /*
 174  * host1x channel
 175  */
 176
 177 struct host1x_channel;
 178 struct host1x_job;
 179
 180 struct host1x_channel *host1x_channel_request(struct host1x_client *client);
 181 struct host1x_channel *host1x_channel_get(struct host1x_channel *channel);
 182 void host1x_channel_put(struct host1x_channel *channel);
 183 int host1x_job_submit(struct host1x_job *job);
 184
 185 /*
 186  * host1x job
 187  */
 188
 189 #define HOST1X_RELOC_READ       (1 << 0)
 190 #define HOST1X_RELOC_WRITE      (1 << 1)
 191
 192 struct host1x_reloc {
 193         struct {
 194                 struct host1x_bo *bo;
 195                 unsigned long offset;
 196         } cmdbuf;
 197         struct {
 198                 struct host1x_bo *bo;
 199                 unsigned long offset;
 200         } target;
 201         unsigned long shift;
 202         unsigned long flags;
 203 };
 204
 205 struct host1x_job {
 206         /* When refcount goes to zero, job can be freed */
 207         struct kref ref;
 208
 209         /* List entry */
 210         struct list_head list;
 211
 212         /* Channel where job is submitted to */
 213         struct host1x_channel *channel;
 214
 215         /* client where the job originated */
 216         struct host1x_client *client;
 217
 218         /* Gathers and their memory */
 219         struct host1x_job_gather *gathers;
 220         unsigned int num_gathers;
 221
 222         /* Array of handles to be pinned & unpinned */
 223         struct host1x_reloc *relocs;
 224         unsigned int num_relocs;
 225         struct host1x_job_unpin_data *unpins;
 226         unsigned int num_unpins;
 227
 228         dma_addr_t *addr_phys;
 229         dma_addr_t *gather_addr_phys;
 230         dma_addr_t *reloc_addr_phys;
 231
 232         /* Sync point id, number of increments and end related to the submit */
 233         struct host1x_syncpt *syncpt;
 234         u32 syncpt_incrs;
 235         u32 syncpt_end;
 236
 237         /* Maximum time to wait for this job */
 238         unsigned int timeout;
 239
 240         /* Index and number of slots used in the push buffer */
 241         unsigned int first_get;
 242         unsigned int num_slots;
 243
 244         /* Copy of gathers */
 245         size_t gather_copy_size;
 246         dma_addr_t gather_copy;
 247         u8 *gather_copy_mapped;
 248
 249         /* Check if register is marked as an address reg */
 250         int (*is_addr_reg)(struct device *dev, u32 class, u32 reg);
 251
 252         /* Check if class belongs to the unit */
 253         int (*is_valid_class)(u32 class);
 254
 255         /* Request a SETCLASS to this class */
 256         u32 class;
 257
 258         /* Add a channel wait for previous ops to complete */
 259         bool serialize;
 260 };
 261
 262 struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
 263                                     u32 num_cmdbufs, u32 num_relocs);
 264 void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
 265                            unsigned int words, unsigned int offset);
 266 struct host1x_job *host1x_job_get(struct host1x_job *job);
 267 void host1x_job_put(struct host1x_job *job);
 268 int host1x_job_pin(struct host1x_job *job, struct device *dev);
 269 void host1x_job_unpin(struct host1x_job *job);
 270
 271 /*
 272  * subdevice probe infrastructure
 273  */
 274
 275 struct host1x_device;
 276
 277 /**
 278  * struct host1x_driver - host1x logical device driver
 279  * @driver: core driver
 280  * @subdevs: table of OF device IDs matching subdevices for this driver
 281  * @list: list node for the driver
 282  * @probe: called when the host1x logical device is probed
 283  * @remove: called when the host1x logical device is removed
 284  * @shutdown: called when the host1x logical device is shut down
 285  */
 286 struct host1x_driver {
 287         struct device_driver driver;
 288
 289         const struct of_device_id *subdevs;
 290         struct list_head list;
 291
 292         int (*probe)(struct host1x_device *device);
 293         int (*remove)(struct host1x_device *device);
 294         void (*shutdown)(struct host1x_device *device);
 295 };
 296
 297 static inline struct host1x_driver *
 298 to_host1x_driver(struct device_driver *driver)
 299 {
 300         return container_of(driver, struct host1x_driver, driver);
 301 }
 302
 303 int host1x_driver_register_full(struct host1x_driver *driver,
 304                                 struct module *owner);
 305 void host1x_driver_unregister(struct host1x_driver *driver);
 306
 307 #define host1x_driver_register(driver) \
 308         host1x_driver_register_full(driver, THIS_MODULE)
 309
 310 struct host1x_device {
 311         struct host1x_driver *driver;
 312         struct list_head list;
 313         struct device dev;
 314
 315         struct mutex subdevs_lock;
 316         struct list_head subdevs;
 317         struct list_head active;
 318
 319         struct mutex clients_lock;
 320         struct list_head clients;
 321
 322         bool registered;
 323
 324         struct device_dma_parameters dma_parms;
 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 void __host1x_client_init(struct host1x_client *client, struct lock_class_key *key);
 336 void host1x_client_exit(struct host1x_client *client);
 337
 338 #define host1x_client_init(client)                      \
 339         ({                                              \
 340                 static struct lock_class_key __key;     \
 341                 __host1x_client_init(client, &__key);   \
 342         })
 343
 344 int __host1x_client_register(struct host1x_client *client);
 345
 346 /*
 347  * Note that this wrapper calls __host1x_client_init() for compatibility
 348  * with existing callers. Callers that want to separately initialize and
 349  * register a host1x client must first initialize using either of the
 350  * __host1x_client_init() or host1x_client_init() functions and then use
 351  * the low-level __host1x_client_register() function to avoid the client
 352  * getting reinitialized.
 353  */
 354 #define host1x_client_register(client)                  \
 355         ({                                              \
 356                 static struct lock_class_key __key;     \
 357                 __host1x_client_init(client, &__key);   \
 358                 __host1x_client_register(client);       \
 359         })
 360
 361 int host1x_client_unregister(struct host1x_client *client);
 362
 363 int host1x_client_suspend(struct host1x_client *client);
 364 int host1x_client_resume(struct host1x_client *client);
 365
 366 struct tegra_mipi_device;
 367
 368 struct tegra_mipi_device *tegra_mipi_request(struct device *device,
 369                                              struct device_node *np);
 370 void tegra_mipi_free(struct tegra_mipi_device *device);
 371 int tegra_mipi_enable(struct tegra_mipi_device *device);
 372 int tegra_mipi_disable(struct tegra_mipi_device *device);
 373 int tegra_mipi_start_calibration(struct tegra_mipi_device *device);
 374 int tegra_mipi_finish_calibration(struct tegra_mipi_device *device);
 375
 376 #endif