]> Git Repo - linux.git/blob - drivers/gpu/drm/imagination/pvr_context.c
Merge tag 'for-linus-6.14-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux.git] / drivers / gpu / drm / imagination / pvr_context.c
1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
2 /* Copyright (c) 2023 Imagination Technologies Ltd. */
3
4 #include "pvr_cccb.h"
5 #include "pvr_context.h"
6 #include "pvr_device.h"
7 #include "pvr_drv.h"
8 #include "pvr_gem.h"
9 #include "pvr_job.h"
10 #include "pvr_power.h"
11 #include "pvr_rogue_fwif.h"
12 #include "pvr_rogue_fwif_common.h"
13 #include "pvr_rogue_fwif_resetframework.h"
14 #include "pvr_stream.h"
15 #include "pvr_stream_defs.h"
16 #include "pvr_vm.h"
17
18 #include <drm/drm_auth.h>
19 #include <drm/drm_managed.h>
20
21 #include <linux/bug.h>
22 #include <linux/errno.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/sched.h>
26 #include <linux/slab.h>
27 #include <linux/spinlock.h>
28 #include <linux/string.h>
29 #include <linux/types.h>
30 #include <linux/xarray.h>
31
32 static int
33 remap_priority(struct pvr_file *pvr_file, s32 uapi_priority,
34                enum pvr_context_priority *priority_out)
35 {
36         switch (uapi_priority) {
37         case DRM_PVR_CTX_PRIORITY_LOW:
38                 *priority_out = PVR_CTX_PRIORITY_LOW;
39                 break;
40         case DRM_PVR_CTX_PRIORITY_NORMAL:
41                 *priority_out = PVR_CTX_PRIORITY_MEDIUM;
42                 break;
43         case DRM_PVR_CTX_PRIORITY_HIGH:
44                 if (!capable(CAP_SYS_NICE) && !drm_is_current_master(from_pvr_file(pvr_file)))
45                         return -EACCES;
46                 *priority_out = PVR_CTX_PRIORITY_HIGH;
47                 break;
48         default:
49                 return -EINVAL;
50         }
51
52         return 0;
53 }
54
55 static int get_fw_obj_size(enum drm_pvr_ctx_type type)
56 {
57         switch (type) {
58         case DRM_PVR_CTX_TYPE_RENDER:
59                 return sizeof(struct rogue_fwif_fwrendercontext);
60         case DRM_PVR_CTX_TYPE_COMPUTE:
61                 return sizeof(struct rogue_fwif_fwcomputecontext);
62         case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
63                 return sizeof(struct rogue_fwif_fwtransfercontext);
64         }
65
66         return -EINVAL;
67 }
68
69 static int
70 process_static_context_state(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,
71                              u64 stream_user_ptr, u32 stream_size, void *dest)
72 {
73         void *stream;
74         int err;
75
76         stream = memdup_user(u64_to_user_ptr(stream_user_ptr), stream_size);
77         if (IS_ERR(stream))
78                 return PTR_ERR(stream);
79
80         err = pvr_stream_process(pvr_dev, cmd_defs, stream, stream_size, dest);
81
82         kfree(stream);
83
84         return err;
85 }
86
87 static int init_render_fw_objs(struct pvr_context *ctx,
88                                struct drm_pvr_ioctl_create_context_args *args,
89                                void *fw_ctx_map)
90 {
91         struct rogue_fwif_static_rendercontext_state *static_rendercontext_state;
92         struct rogue_fwif_fwrendercontext *fw_render_context = fw_ctx_map;
93
94         if (!args->static_context_state_len)
95                 return -EINVAL;
96
97         static_rendercontext_state = &fw_render_context->static_render_context_state;
98
99         /* Copy static render context state from userspace. */
100         return process_static_context_state(ctx->pvr_dev,
101                                             &pvr_static_render_context_state_stream,
102                                             args->static_context_state,
103                                             args->static_context_state_len,
104                                             &static_rendercontext_state->ctxswitch_regs[0]);
105 }
106
107 static int init_compute_fw_objs(struct pvr_context *ctx,
108                                 struct drm_pvr_ioctl_create_context_args *args,
109                                 void *fw_ctx_map)
110 {
111         struct rogue_fwif_fwcomputecontext *fw_compute_context = fw_ctx_map;
112         struct rogue_fwif_cdm_registers_cswitch *ctxswitch_regs;
113
114         if (!args->static_context_state_len)
115                 return -EINVAL;
116
117         ctxswitch_regs = &fw_compute_context->static_compute_context_state.ctxswitch_regs;
118
119         /* Copy static render context state from userspace. */
120         return process_static_context_state(ctx->pvr_dev,
121                                             &pvr_static_compute_context_state_stream,
122                                             args->static_context_state,
123                                             args->static_context_state_len,
124                                             ctxswitch_regs);
125 }
126
127 static int init_transfer_fw_objs(struct pvr_context *ctx,
128                                  struct drm_pvr_ioctl_create_context_args *args,
129                                  void *fw_ctx_map)
130 {
131         if (args->static_context_state_len)
132                 return -EINVAL;
133
134         return 0;
135 }
136
137 static int init_fw_objs(struct pvr_context *ctx,
138                         struct drm_pvr_ioctl_create_context_args *args,
139                         void *fw_ctx_map)
140 {
141         switch (ctx->type) {
142         case DRM_PVR_CTX_TYPE_RENDER:
143                 return init_render_fw_objs(ctx, args, fw_ctx_map);
144         case DRM_PVR_CTX_TYPE_COMPUTE:
145                 return init_compute_fw_objs(ctx, args, fw_ctx_map);
146         case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
147                 return init_transfer_fw_objs(ctx, args, fw_ctx_map);
148         }
149
150         return -EINVAL;
151 }
152
153 static void
154 ctx_fw_data_init(void *cpu_ptr, void *priv)
155 {
156         struct pvr_context *ctx = priv;
157
158         memcpy(cpu_ptr, ctx->data, ctx->data_size);
159 }
160
161 /**
162  * pvr_context_destroy_queues() - Destroy all queues attached to a context.
163  * @ctx: Context to destroy queues on.
164  *
165  * Should be called when the last reference to a context object is dropped.
166  * It releases all resources attached to the queues bound to this context.
167  */
168 static void pvr_context_destroy_queues(struct pvr_context *ctx)
169 {
170         switch (ctx->type) {
171         case DRM_PVR_CTX_TYPE_RENDER:
172                 pvr_queue_destroy(ctx->queues.fragment);
173                 pvr_queue_destroy(ctx->queues.geometry);
174                 break;
175         case DRM_PVR_CTX_TYPE_COMPUTE:
176                 pvr_queue_destroy(ctx->queues.compute);
177                 break;
178         case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
179                 pvr_queue_destroy(ctx->queues.transfer);
180                 break;
181         }
182 }
183
184 /**
185  * pvr_context_create_queues() - Create all queues attached to a context.
186  * @ctx: Context to create queues on.
187  * @args: Context creation arguments passed by userspace.
188  * @fw_ctx_map: CPU mapping of the FW context object.
189  *
190  * Return:
191  *  * 0 on success, or
192  *  * A negative error code otherwise.
193  */
194 static int pvr_context_create_queues(struct pvr_context *ctx,
195                                      struct drm_pvr_ioctl_create_context_args *args,
196                                      void *fw_ctx_map)
197 {
198         int err;
199
200         switch (ctx->type) {
201         case DRM_PVR_CTX_TYPE_RENDER:
202                 ctx->queues.geometry = pvr_queue_create(ctx, DRM_PVR_JOB_TYPE_GEOMETRY,
203                                                         args, fw_ctx_map);
204                 if (IS_ERR(ctx->queues.geometry)) {
205                         err = PTR_ERR(ctx->queues.geometry);
206                         ctx->queues.geometry = NULL;
207                         goto err_destroy_queues;
208                 }
209
210                 ctx->queues.fragment = pvr_queue_create(ctx, DRM_PVR_JOB_TYPE_FRAGMENT,
211                                                         args, fw_ctx_map);
212                 if (IS_ERR(ctx->queues.fragment)) {
213                         err = PTR_ERR(ctx->queues.fragment);
214                         ctx->queues.fragment = NULL;
215                         goto err_destroy_queues;
216                 }
217                 return 0;
218
219         case DRM_PVR_CTX_TYPE_COMPUTE:
220                 ctx->queues.compute = pvr_queue_create(ctx, DRM_PVR_JOB_TYPE_COMPUTE,
221                                                        args, fw_ctx_map);
222                 if (IS_ERR(ctx->queues.compute)) {
223                         err = PTR_ERR(ctx->queues.compute);
224                         ctx->queues.compute = NULL;
225                         goto err_destroy_queues;
226                 }
227                 return 0;
228
229         case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
230                 ctx->queues.transfer = pvr_queue_create(ctx, DRM_PVR_JOB_TYPE_TRANSFER_FRAG,
231                                                         args, fw_ctx_map);
232                 if (IS_ERR(ctx->queues.transfer)) {
233                         err = PTR_ERR(ctx->queues.transfer);
234                         ctx->queues.transfer = NULL;
235                         goto err_destroy_queues;
236                 }
237                 return 0;
238         }
239
240         return -EINVAL;
241
242 err_destroy_queues:
243         pvr_context_destroy_queues(ctx);
244         return err;
245 }
246
247 /**
248  * pvr_context_kill_queues() - Kill queues attached to context.
249  * @ctx: Context to kill queues on.
250  *
251  * Killing the queues implies making them unusable for future jobs, while still
252  * letting the currently submitted jobs a chance to finish. Queue resources will
253  * stay around until pvr_context_destroy_queues() is called.
254  */
255 static void pvr_context_kill_queues(struct pvr_context *ctx)
256 {
257         switch (ctx->type) {
258         case DRM_PVR_CTX_TYPE_RENDER:
259                 pvr_queue_kill(ctx->queues.fragment);
260                 pvr_queue_kill(ctx->queues.geometry);
261                 break;
262         case DRM_PVR_CTX_TYPE_COMPUTE:
263                 pvr_queue_kill(ctx->queues.compute);
264                 break;
265         case DRM_PVR_CTX_TYPE_TRANSFER_FRAG:
266                 pvr_queue_kill(ctx->queues.transfer);
267                 break;
268         }
269 }
270
271 /**
272  * pvr_context_create() - Create a context.
273  * @pvr_file: File to attach the created context to.
274  * @args: Context creation arguments.
275  *
276  * Return:
277  *  * 0 on success, or
278  *  * A negative error code on failure.
279  */
280 int pvr_context_create(struct pvr_file *pvr_file, struct drm_pvr_ioctl_create_context_args *args)
281 {
282         struct pvr_device *pvr_dev = pvr_file->pvr_dev;
283         struct pvr_context *ctx;
284         int ctx_size;
285         int err;
286
287         /* Context creation flags are currently unused and must be zero. */
288         if (args->flags)
289                 return -EINVAL;
290
291         ctx_size = get_fw_obj_size(args->type);
292         if (ctx_size < 0)
293                 return ctx_size;
294
295         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
296         if (!ctx)
297                 return -ENOMEM;
298
299         ctx->data_size = ctx_size;
300         ctx->type = args->type;
301         ctx->flags = args->flags;
302         ctx->pvr_dev = pvr_dev;
303         kref_init(&ctx->ref_count);
304
305         err = remap_priority(pvr_file, args->priority, &ctx->priority);
306         if (err)
307                 goto err_free_ctx;
308
309         ctx->vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle);
310         if (IS_ERR(ctx->vm_ctx)) {
311                 err = PTR_ERR(ctx->vm_ctx);
312                 goto err_free_ctx;
313         }
314
315         ctx->data = kzalloc(ctx_size, GFP_KERNEL);
316         if (!ctx->data) {
317                 err = -ENOMEM;
318                 goto err_put_vm;
319         }
320
321         err = pvr_context_create_queues(ctx, args, ctx->data);
322         if (err)
323                 goto err_free_ctx_data;
324
325         err = init_fw_objs(ctx, args, ctx->data);
326         if (err)
327                 goto err_destroy_queues;
328
329         err = pvr_fw_object_create(pvr_dev, ctx_size, PVR_BO_FW_FLAGS_DEVICE_UNCACHED,
330                                    ctx_fw_data_init, ctx, &ctx->fw_obj);
331         if (err)
332                 goto err_free_ctx_data;
333
334         err = xa_alloc(&pvr_dev->ctx_ids, &ctx->ctx_id, ctx, xa_limit_32b, GFP_KERNEL);
335         if (err)
336                 goto err_destroy_fw_obj;
337
338         err = xa_alloc(&pvr_file->ctx_handles, &args->handle, ctx, xa_limit_32b, GFP_KERNEL);
339         if (err) {
340                 /*
341                  * It's possible that another thread could have taken a reference on the context at
342                  * this point as it is in the ctx_ids xarray. Therefore instead of directly
343                  * destroying the context, drop a reference instead.
344                  */
345                 pvr_context_put(ctx);
346                 return err;
347         }
348
349         spin_lock(&pvr_dev->ctx_list_lock);
350         list_add_tail(&ctx->file_link, &pvr_file->contexts);
351         spin_unlock(&pvr_dev->ctx_list_lock);
352
353         return 0;
354
355 err_destroy_fw_obj:
356         pvr_fw_object_destroy(ctx->fw_obj);
357
358 err_destroy_queues:
359         pvr_context_destroy_queues(ctx);
360
361 err_free_ctx_data:
362         kfree(ctx->data);
363
364 err_put_vm:
365         pvr_vm_context_put(ctx->vm_ctx);
366
367 err_free_ctx:
368         kfree(ctx);
369         return err;
370 }
371
372 static void
373 pvr_context_release(struct kref *ref_count)
374 {
375         struct pvr_context *ctx =
376                 container_of(ref_count, struct pvr_context, ref_count);
377         struct pvr_device *pvr_dev = ctx->pvr_dev;
378
379         WARN_ON(in_interrupt());
380         spin_lock(&pvr_dev->ctx_list_lock);
381         list_del(&ctx->file_link);
382         spin_unlock(&pvr_dev->ctx_list_lock);
383
384         xa_erase(&pvr_dev->ctx_ids, ctx->ctx_id);
385         pvr_context_destroy_queues(ctx);
386         pvr_fw_object_destroy(ctx->fw_obj);
387         kfree(ctx->data);
388         pvr_vm_context_put(ctx->vm_ctx);
389         kfree(ctx);
390 }
391
392 /**
393  * pvr_context_put() - Release reference on context
394  * @ctx: Target context.
395  */
396 void
397 pvr_context_put(struct pvr_context *ctx)
398 {
399         if (ctx)
400                 kref_put(&ctx->ref_count, pvr_context_release);
401 }
402
403 /**
404  * pvr_context_destroy() - Destroy context
405  * @pvr_file: Pointer to pvr_file structure.
406  * @handle: Userspace context handle.
407  *
408  * Removes context from context list and drops initial reference. Context will
409  * then be destroyed once all outstanding references are dropped.
410  *
411  * Return:
412  *  * 0 on success, or
413  *  * -%EINVAL if context not in context list.
414  */
415 int
416 pvr_context_destroy(struct pvr_file *pvr_file, u32 handle)
417 {
418         struct pvr_context *ctx = xa_erase(&pvr_file->ctx_handles, handle);
419
420         if (!ctx)
421                 return -EINVAL;
422
423         /* Make sure nothing can be queued to the queues after that point. */
424         pvr_context_kill_queues(ctx);
425
426         /* Release the reference held by the handle set. */
427         pvr_context_put(ctx);
428
429         return 0;
430 }
431
432 /**
433  * pvr_destroy_contexts_for_file: Destroy any contexts associated with the given file
434  * @pvr_file: Pointer to pvr_file structure.
435  *
436  * Removes all contexts associated with @pvr_file from the device context list and drops initial
437  * references. Contexts will then be destroyed once all outstanding references are dropped.
438  */
439 void pvr_destroy_contexts_for_file(struct pvr_file *pvr_file)
440 {
441         struct pvr_device *pvr_dev = pvr_file->pvr_dev;
442         struct pvr_context *ctx;
443         unsigned long handle;
444
445         xa_for_each(&pvr_file->ctx_handles, handle, ctx)
446                 pvr_context_destroy(pvr_file, handle);
447
448         spin_lock(&pvr_dev->ctx_list_lock);
449         ctx = list_first_entry(&pvr_file->contexts, struct pvr_context, file_link);
450
451         while (!list_entry_is_head(ctx, &pvr_file->contexts, file_link)) {
452                 list_del_init(&ctx->file_link);
453
454                 if (pvr_context_get_if_referenced(ctx)) {
455                         spin_unlock(&pvr_dev->ctx_list_lock);
456
457                         pvr_vm_unmap_all(ctx->vm_ctx);
458
459                         pvr_context_put(ctx);
460                         spin_lock(&pvr_dev->ctx_list_lock);
461                 }
462                 ctx = list_first_entry(&pvr_file->contexts, struct pvr_context, file_link);
463         }
464         spin_unlock(&pvr_dev->ctx_list_lock);
465 }
466
467 /**
468  * pvr_context_device_init() - Device level initialization for queue related resources.
469  * @pvr_dev: The device to initialize.
470  */
471 void pvr_context_device_init(struct pvr_device *pvr_dev)
472 {
473         xa_init_flags(&pvr_dev->ctx_ids, XA_FLAGS_ALLOC1);
474         spin_lock_init(&pvr_dev->ctx_list_lock);
475 }
476
477 /**
478  * pvr_context_device_fini() - Device level cleanup for queue related resources.
479  * @pvr_dev: The device to cleanup.
480  */
481 void pvr_context_device_fini(struct pvr_device *pvr_dev)
482 {
483         WARN_ON(!xa_empty(&pvr_dev->ctx_ids));
484         xa_destroy(&pvr_dev->ctx_ids);
485 }
This page took 0.057643 seconds and 4 git commands to generate.