1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright(c) 2019 Intel Corporation. All rights rsvd. */
3 #ifndef _IDXD_H_
4 #define _IDXD_H_
5
6 #include <linux/sbitmap.h>
7 #include <linux/dmaengine.h>
8 #include <linux/percpu-rwsem.h>
9 #include <linux/wait.h>
10 #include <linux/cdev.h>
11 #include <linux/idr.h>
12 #include <linux/pci.h>
13 #include <linux/bitmap.h>
14 #include <linux/perf_event.h>
15 #include <linux/iommu.h>
16 #include <uapi/linux/idxd.h>
17 #include "registers.h"
18
19 #define IDXD_DRIVER_VERSION "1.00"
20
21 extern struct kmem_cache *idxd_desc_pool;
22 extern bool tc_override;
23
24 struct idxd_wq;
25 struct idxd_dev;
26
27 enum idxd_dev_type {
28 IDXD_DEV_NONE = -1,
29 IDXD_DEV_DSA = 0,
30 IDXD_DEV_IAX,
31 IDXD_DEV_WQ,
32 IDXD_DEV_GROUP,
33 IDXD_DEV_ENGINE,
34 IDXD_DEV_CDEV,
35 IDXD_DEV_CDEV_FILE,
36 IDXD_DEV_MAX_TYPE,
37 };
38
39 struct idxd_dev {
40 struct device conf_dev;
41 enum idxd_dev_type type;
42 };
43
44 #define IDXD_REG_TIMEOUT 50
45 #define IDXD_DRAIN_TIMEOUT 5000
46
47 enum idxd_type {
48 IDXD_TYPE_UNKNOWN = -1,
49 IDXD_TYPE_DSA = 0,
50 IDXD_TYPE_IAX,
51 IDXD_TYPE_MAX,
52 };
53
54 #define IDXD_NAME_SIZE 128
55 #define IDXD_PMU_EVENT_MAX 64
56
57 #define IDXD_ENQCMDS_RETRIES 32
58 #define IDXD_ENQCMDS_MAX_RETRIES 64
59
60 struct idxd_device_driver {
61 const char *name;
62 enum idxd_dev_type *type;
63 int (*probe)(struct idxd_dev *idxd_dev);
64 void (*remove)(struct idxd_dev *idxd_dev);
65 struct device_driver drv;
66 };
67
68 extern struct idxd_device_driver dsa_drv;
69 extern struct idxd_device_driver idxd_drv;
70 extern struct idxd_device_driver idxd_dmaengine_drv;
71 extern struct idxd_device_driver idxd_user_drv;
72
73 #define INVALID_INT_HANDLE -1
74 struct idxd_irq_entry {
75 int id;
76 int vector;
77 struct llist_head pending_llist;
78 struct list_head work_list;
79 /*
80 * Lock to protect access between irq thread process descriptor
81 * and irq thread processing error descriptor.
82 */
83 spinlock_t list_lock;
84 int int_handle;
85 ioasid_t pasid;
86 };
87
88 struct idxd_group {
89 struct idxd_dev idxd_dev;
90 struct idxd_device *idxd;
91 struct grpcfg grpcfg;
92 int id;
93 int num_engines;
94 int num_wqs;
95 bool use_rdbuf_limit;
96 u8 rdbufs_allowed;
97 u8 rdbufs_reserved;
98 int tc_a;
99 int tc_b;
100 int desc_progress_limit;
101 int batch_progress_limit;
102 };
103
104 struct idxd_pmu {
105 struct idxd_device *idxd;
106
107 struct perf_event *event_list[IDXD_PMU_EVENT_MAX];
108 int n_events;
109
110 DECLARE_BITMAP(used_mask, IDXD_PMU_EVENT_MAX);
111
112 struct pmu pmu;
113 char name[IDXD_NAME_SIZE];
114 int cpu;
115
116 int n_counters;
117 int counter_width;
118 int n_event_categories;
119
120 bool per_counter_caps_supported;
121 unsigned long supported_event_categories;
122
123 unsigned long supported_filters;
124 int n_filters;
125
126 struct hlist_node cpuhp_node;
127 };
128
129 #define IDXD_MAX_PRIORITY 0xf
130
131 enum {
132 COUNTER_FAULTS = 0,
133 COUNTER_FAULT_FAILS,
134 COUNTER_MAX
135 };
136
137 enum idxd_wq_state {
138 IDXD_WQ_DISABLED = 0,
139 IDXD_WQ_ENABLED,
140 };
141
142 enum idxd_wq_flag {
143 WQ_FLAG_DEDICATED = 0,
144 WQ_FLAG_BLOCK_ON_FAULT,
145 WQ_FLAG_ATS_DISABLE,
146 WQ_FLAG_PRS_DISABLE,
147 };
148
149 enum idxd_wq_type {
150 IDXD_WQT_NONE = 0,
151 IDXD_WQT_KERNEL,
152 IDXD_WQT_USER,
153 };
154
155 struct idxd_cdev {
156 struct idxd_wq *wq;
157 struct cdev cdev;
158 struct idxd_dev idxd_dev;
159 int minor;
160 };
161
162 #define IDXD_ALLOCATED_BATCH_SIZE 128U
163 #define WQ_NAME_SIZE 1024
164 #define WQ_TYPE_SIZE 10
165
166 #define WQ_DEFAULT_QUEUE_DEPTH 16
167 #define WQ_DEFAULT_MAX_XFER SZ_2M
168 #define WQ_DEFAULT_MAX_BATCH 32
169
170 enum idxd_op_type {
171 IDXD_OP_BLOCK = 0,
172 IDXD_OP_NONBLOCK = 1,
173 };
174
175 enum idxd_complete_type {
176 IDXD_COMPLETE_NORMAL = 0,
177 IDXD_COMPLETE_ABORT,
178 IDXD_COMPLETE_DEV_FAIL,
179 };
180
181 struct idxd_dma_chan {
182 struct dma_chan chan;
183 struct idxd_wq *wq;
184 };
185
186 struct idxd_wq {
187 void __iomem *portal;
188 u32 portal_offset;
189 unsigned int enqcmds_retries;
190 struct percpu_ref wq_active;
191 struct completion wq_dead;
192 struct completion wq_resurrect;
193 struct idxd_dev idxd_dev;
194 struct idxd_cdev *idxd_cdev;
195 struct wait_queue_head err_queue;
196 struct workqueue_struct *wq;
197 struct idxd_device *idxd;
198 int id;
199 struct idxd_irq_entry ie;
200 enum idxd_wq_type type;
201 struct idxd_group *group;
202 int client_count;
203 struct mutex wq_lock; /* mutex for workqueue */
204 u32 size;
205 u32 threshold;
206 u32 priority;
207 enum idxd_wq_state state;
208 unsigned long flags;
209 union wqcfg *wqcfg;
210 unsigned long *opcap_bmap;
211
212 struct dsa_hw_desc **hw_descs;
213 int num_descs;
214 union {
215 struct dsa_completion_record *compls;
216 struct iax_completion_record *iax_compls;
217 };
218 dma_addr_t compls_addr;
219 int compls_size;
220 struct idxd_desc **descs;
221 struct sbitmap_queue sbq;
222 struct idxd_dma_chan *idxd_chan;
223 char name[WQ_NAME_SIZE + 1];
224 u64 max_xfer_bytes;
225 u32 max_batch_size;
226
227 /* Lock to protect upasid_xa access. */
228 struct mutex uc_lock;
229 struct xarray upasid_xa;
230 };
231
232 struct idxd_engine {
233 struct idxd_dev idxd_dev;
234 int id;
235 struct idxd_group *group;
236 struct idxd_device *idxd;
237 };
238
239 /* shadow registers */
240 struct idxd_hw {
241 u32 version;
242 union gen_cap_reg gen_cap;
243 union wq_cap_reg wq_cap;
244 union group_cap_reg group_cap;
245 union engine_cap_reg engine_cap;
246 struct opcap opcap;
247 u32 cmd_cap;
248 union iaa_cap_reg iaa_cap;
249 };
250
251 enum idxd_device_state {
252 IDXD_DEV_HALTED = -1,
253 IDXD_DEV_DISABLED = 0,
254 IDXD_DEV_ENABLED,
255 };
256
257 enum idxd_device_flag {
258 IDXD_FLAG_CONFIGURABLE = 0,
259 IDXD_FLAG_CMD_RUNNING,
260 IDXD_FLAG_PASID_ENABLED,
261 IDXD_FLAG_USER_PASID_ENABLED,
262 };
263
264 struct idxd_dma_dev {
265 struct idxd_device *idxd;
266 struct dma_device dma;
267 };
268
269 struct idxd_driver_data {
270 const char *name_prefix;
271 enum idxd_type type;
272 struct device_type *dev_type;
273 int compl_size;
274 int align;
275 int evl_cr_off;
276 int cr_status_off;
277 int cr_result_off;
278 };
279
280 struct idxd_evl {
281 /* Lock to protect event log access. */
282 spinlock_t lock;
283 void *log;
284 dma_addr_t dma;
285 /* Total size of event log = number of entries * entry size. */
286 unsigned int log_size;
287 /* The number of entries in the event log. */
288 u16 size;
289 u16 head;
290 unsigned long *bmap;
291 bool batch_fail[IDXD_MAX_BATCH_IDENT];
292 };
293
294 struct idxd_evl_fault {
295 struct work_struct work;
296 struct idxd_wq *wq;
297 u8 status;
298
299 /* make this last member always */
300 struct __evl_entry entry[];
301 };
302
303 struct idxd_device {
304 struct idxd_dev idxd_dev;
305 struct idxd_driver_data *data;
306 struct list_head list;
307 struct idxd_hw hw;
308 enum idxd_device_state state;
309 unsigned long flags;
310 int id;
311 int major;
312 u32 cmd_status;
313 struct idxd_irq_entry ie; /* misc irq, msix 0 */
314
315 struct pci_dev *pdev;
316 void __iomem *reg_base;
317
318 spinlock_t dev_lock; /* spinlock for device */
319 spinlock_t cmd_lock; /* spinlock for device commands */
320 struct completion *cmd_done;
321 struct idxd_group **groups;
322 struct idxd_wq **wqs;
323 struct idxd_engine **engines;
324
325 struct iommu_sva *sva;
326 unsigned int pasid;
327
328 int num_groups;
329 int irq_cnt;
330 bool request_int_handles;
331
332 u32 msix_perm_offset;
333 u32 wqcfg_offset;
334 u32 grpcfg_offset;
335 u32 perfmon_offset;
336
337 u64 max_xfer_bytes;
338 u32 max_batch_size;
339 int max_groups;
340 int max_engines;
341 int max_rdbufs;
342 int max_wqs;
343 int max_wq_size;
344 int rdbuf_limit;
345 int nr_rdbufs; /* non-reserved read buffers */
346 unsigned int wqcfg_size;
347 unsigned long *wq_enable_map;
348
349 union sw_err_reg sw_err;
350 wait_queue_head_t cmd_waitq;
351
352 struct idxd_dma_dev *idxd_dma;
353 struct workqueue_struct *wq;
354 struct work_struct work;
355
356 struct idxd_pmu *idxd_pmu;
357
358 unsigned long *opcap_bmap;
359 struct idxd_evl *evl;
360 struct kmem_cache *evl_cache;
361
362 struct dentry *dbgfs_dir;
363 struct dentry *dbgfs_evl_file;
364 };
365
evl_ent_size(struct idxd_device * idxd)366 static inline unsigned int evl_ent_size(struct idxd_device *idxd)
367 {
368 return idxd->hw.gen_cap.evl_support ?
369 (32 * (1 << idxd->hw.gen_cap.evl_support)) : 0;
370 }
371
evl_size(struct idxd_device * idxd)372 static inline unsigned int evl_size(struct idxd_device *idxd)
373 {
374 return idxd->evl->size * evl_ent_size(idxd);
375 }
376
377 /* IDXD software descriptor */
378 struct idxd_desc {
379 union {
380 struct dsa_hw_desc *hw;
381 struct iax_hw_desc *iax_hw;
382 };
383 dma_addr_t desc_dma;
384 union {
385 struct dsa_completion_record *completion;
386 struct iax_completion_record *iax_completion;
387 };
388 dma_addr_t compl_dma;
389 struct dma_async_tx_descriptor txd;
390 struct llist_node llnode;
391 struct list_head list;
392 int id;
393 int cpu;
394 struct idxd_wq *wq;
395 };
396
397 /*
398 * This is software defined error for the completion status. We overload the error code
399 * that will never appear in completion status and only SWERR register.
400 */
401 enum idxd_completion_status {
402 IDXD_COMP_DESC_ABORT = 0xff,
403 };
404
405 #define idxd_confdev(idxd) &idxd->idxd_dev.conf_dev
406 #define wq_confdev(wq) &wq->idxd_dev.conf_dev
407 #define engine_confdev(engine) &engine->idxd_dev.conf_dev
408 #define group_confdev(group) &group->idxd_dev.conf_dev
409 #define cdev_dev(cdev) &cdev->idxd_dev.conf_dev
410 #define user_ctx_dev(ctx) (&(ctx)->idxd_dev.conf_dev)
411
412 #define confdev_to_idxd_dev(dev) container_of(dev, struct idxd_dev, conf_dev)
413 #define idxd_dev_to_idxd(idxd_dev) container_of(idxd_dev, struct idxd_device, idxd_dev)
414 #define idxd_dev_to_wq(idxd_dev) container_of(idxd_dev, struct idxd_wq, idxd_dev)
415
confdev_to_idxd(struct device * dev)416 static inline struct idxd_device *confdev_to_idxd(struct device *dev)
417 {
418 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
419
420 return idxd_dev_to_idxd(idxd_dev);
421 }
422
confdev_to_wq(struct device * dev)423 static inline struct idxd_wq *confdev_to_wq(struct device *dev)
424 {
425 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
426
427 return idxd_dev_to_wq(idxd_dev);
428 }
429
confdev_to_engine(struct device * dev)430 static inline struct idxd_engine *confdev_to_engine(struct device *dev)
431 {
432 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
433
434 return container_of(idxd_dev, struct idxd_engine, idxd_dev);
435 }
436
confdev_to_group(struct device * dev)437 static inline struct idxd_group *confdev_to_group(struct device *dev)
438 {
439 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
440
441 return container_of(idxd_dev, struct idxd_group, idxd_dev);
442 }
443
dev_to_cdev(struct device * dev)444 static inline struct idxd_cdev *dev_to_cdev(struct device *dev)
445 {
446 struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
447
448 return container_of(idxd_dev, struct idxd_cdev, idxd_dev);
449 }
450
idxd_dev_set_type(struct idxd_dev * idev,int type)451 static inline void idxd_dev_set_type(struct idxd_dev *idev, int type)
452 {
453 if (type >= IDXD_DEV_MAX_TYPE) {
454 idev->type = IDXD_DEV_NONE;
455 return;
456 }
457
458 idev->type = type;
459 }
460
idxd_get_ie(struct idxd_device * idxd,int idx)461 static inline struct idxd_irq_entry *idxd_get_ie(struct idxd_device *idxd, int idx)
462 {
463 return (idx == 0) ? &idxd->ie : &idxd->wqs[idx - 1]->ie;
464 }
465
ie_to_wq(struct idxd_irq_entry * ie)466 static inline struct idxd_wq *ie_to_wq(struct idxd_irq_entry *ie)
467 {
468 return container_of(ie, struct idxd_wq, ie);
469 }
470
ie_to_idxd(struct idxd_irq_entry * ie)471 static inline struct idxd_device *ie_to_idxd(struct idxd_irq_entry *ie)
472 {
473 return container_of(ie, struct idxd_device, ie);
474 }
475
idxd_set_user_intr(struct idxd_device * idxd,bool enable)476 static inline void idxd_set_user_intr(struct idxd_device *idxd, bool enable)
477 {
478 union gencfg_reg reg;
479
480 reg.bits = ioread32(idxd->reg_base + IDXD_GENCFG_OFFSET);
481 reg.user_int_en = enable;
482 iowrite32(reg.bits, idxd->reg_base + IDXD_GENCFG_OFFSET);
483 }
484
485 extern struct bus_type dsa_bus_type;
486
487 extern bool support_enqcmd;
488 extern struct ida idxd_ida;
489 extern struct device_type dsa_device_type;
490 extern struct device_type iax_device_type;
491 extern struct device_type idxd_wq_device_type;
492 extern struct device_type idxd_engine_device_type;
493 extern struct device_type idxd_group_device_type;
494
is_dsa_dev(struct idxd_dev * idxd_dev)495 static inline bool is_dsa_dev(struct idxd_dev *idxd_dev)
496 {
497 return idxd_dev->type == IDXD_DEV_DSA;
498 }
499
is_iax_dev(struct idxd_dev * idxd_dev)500 static inline bool is_iax_dev(struct idxd_dev *idxd_dev)
501 {
502 return idxd_dev->type == IDXD_DEV_IAX;
503 }
504
is_idxd_dev(struct idxd_dev * idxd_dev)505 static inline bool is_idxd_dev(struct idxd_dev *idxd_dev)
506 {
507 return is_dsa_dev(idxd_dev) || is_iax_dev(idxd_dev);
508 }
509
is_idxd_wq_dev(struct idxd_dev * idxd_dev)510 static inline bool is_idxd_wq_dev(struct idxd_dev *idxd_dev)
511 {
512 return idxd_dev->type == IDXD_DEV_WQ;
513 }
514
is_idxd_wq_dmaengine(struct idxd_wq * wq)515 static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq)
516 {
517 if (wq->type == IDXD_WQT_KERNEL && strcmp(wq->name, "dmaengine") == 0)
518 return true;
519 return false;
520 }
521
is_idxd_wq_user(struct idxd_wq * wq)522 static inline bool is_idxd_wq_user(struct idxd_wq *wq)
523 {
524 return wq->type == IDXD_WQT_USER;
525 }
526
is_idxd_wq_kernel(struct idxd_wq * wq)527 static inline bool is_idxd_wq_kernel(struct idxd_wq *wq)
528 {
529 return wq->type == IDXD_WQT_KERNEL;
530 }
531
wq_dedicated(struct idxd_wq * wq)532 static inline bool wq_dedicated(struct idxd_wq *wq)
533 {
534 return test_bit(WQ_FLAG_DEDICATED, &wq->flags);
535 }
536
wq_shared(struct idxd_wq * wq)537 static inline bool wq_shared(struct idxd_wq *wq)
538 {
539 return !test_bit(WQ_FLAG_DEDICATED, &wq->flags);
540 }
541
device_pasid_enabled(struct idxd_device * idxd)542 static inline bool device_pasid_enabled(struct idxd_device *idxd)
543 {
544 return test_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags);
545 }
546
device_user_pasid_enabled(struct idxd_device * idxd)547 static inline bool device_user_pasid_enabled(struct idxd_device *idxd)
548 {
549 return test_bit(IDXD_FLAG_USER_PASID_ENABLED, &idxd->flags);
550 }
551
wq_pasid_enabled(struct idxd_wq * wq)552 static inline bool wq_pasid_enabled(struct idxd_wq *wq)
553 {
554 return (is_idxd_wq_kernel(wq) && device_pasid_enabled(wq->idxd)) ||
555 (is_idxd_wq_user(wq) && device_user_pasid_enabled(wq->idxd));
556 }
557
wq_shared_supported(struct idxd_wq * wq)558 static inline bool wq_shared_supported(struct idxd_wq *wq)
559 {
560 return (support_enqcmd && wq_pasid_enabled(wq));
561 }
562
563 enum idxd_portal_prot {
564 IDXD_PORTAL_UNLIMITED = 0,
565 IDXD_PORTAL_LIMITED,
566 };
567
568 enum idxd_interrupt_type {
569 IDXD_IRQ_MSIX = 0,
570 IDXD_IRQ_IMS,
571 };
572
idxd_get_wq_portal_offset(enum idxd_portal_prot prot)573 static inline int idxd_get_wq_portal_offset(enum idxd_portal_prot prot)
574 {
575 return prot * 0x1000;
576 }
577
idxd_get_wq_portal_full_offset(int wq_id,enum idxd_portal_prot prot)578 static inline int idxd_get_wq_portal_full_offset(int wq_id,
579 enum idxd_portal_prot prot)
580 {
581 return ((wq_id * 4) << PAGE_SHIFT) + idxd_get_wq_portal_offset(prot);
582 }
583
584 #define IDXD_PORTAL_MASK (PAGE_SIZE - 1)
585
586 /*
587 * Even though this function can be accessed by multiple threads, it is safe to use.
588 * At worst the address gets used more than once before it gets incremented. We don't
589 * hit a threshold until iops becomes many million times a second. So the occasional
590 * reuse of the same address is tolerable compare to using an atomic variable. This is
591 * safe on a system that has atomic load/store for 32bit integers. Given that this is an
592 * Intel iEP device, that should not be a problem.
593 */
idxd_wq_portal_addr(struct idxd_wq * wq)594 static inline void __iomem *idxd_wq_portal_addr(struct idxd_wq *wq)
595 {
596 int ofs = wq->portal_offset;
597
598 wq->portal_offset = (ofs + sizeof(struct dsa_raw_desc)) & IDXD_PORTAL_MASK;
599 return wq->portal + ofs;
600 }
601
idxd_wq_get(struct idxd_wq * wq)602 static inline void idxd_wq_get(struct idxd_wq *wq)
603 {
604 wq->client_count++;
605 }
606
idxd_wq_put(struct idxd_wq * wq)607 static inline void idxd_wq_put(struct idxd_wq *wq)
608 {
609 wq->client_count--;
610 }
611
idxd_wq_refcount(struct idxd_wq * wq)612 static inline int idxd_wq_refcount(struct idxd_wq *wq)
613 {
614 return wq->client_count;
615 };
616
617 /*
618 * Intel IAA does not support batch processing.
619 * The max batch size of device, max batch size of wq and
620 * max batch shift of wqcfg should be always 0 on IAA.
621 */
idxd_set_max_batch_size(int idxd_type,struct idxd_device * idxd,u32 max_batch_size)622 static inline void idxd_set_max_batch_size(int idxd_type, struct idxd_device *idxd,
623 u32 max_batch_size)
624 {
625 if (idxd_type == IDXD_TYPE_IAX)
626 idxd->max_batch_size = 0;
627 else
628 idxd->max_batch_size = max_batch_size;
629 }
630
idxd_wq_set_max_batch_size(int idxd_type,struct idxd_wq * wq,u32 max_batch_size)631 static inline void idxd_wq_set_max_batch_size(int idxd_type, struct idxd_wq *wq,
632 u32 max_batch_size)
633 {
634 if (idxd_type == IDXD_TYPE_IAX)
635 wq->max_batch_size = 0;
636 else
637 wq->max_batch_size = max_batch_size;
638 }
639
idxd_wqcfg_set_max_batch_shift(int idxd_type,union wqcfg * wqcfg,u32 max_batch_shift)640 static inline void idxd_wqcfg_set_max_batch_shift(int idxd_type, union wqcfg *wqcfg,
641 u32 max_batch_shift)
642 {
643 if (idxd_type == IDXD_TYPE_IAX)
644 wqcfg->max_batch_shift = 0;
645 else
646 wqcfg->max_batch_shift = max_batch_shift;
647 }
648
649 int __must_check __idxd_driver_register(struct idxd_device_driver *idxd_drv,
650 struct module *module, const char *mod_name);
651 #define idxd_driver_register(driver) \
652 __idxd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME)
653
654 void idxd_driver_unregister(struct idxd_device_driver *idxd_drv);
655
656 #define module_idxd_driver(__idxd_driver) \
657 module_driver(__idxd_driver, idxd_driver_register, idxd_driver_unregister)
658
659 int idxd_register_bus_type(void);
660 void idxd_unregister_bus_type(void);
661 int idxd_register_devices(struct idxd_device *idxd);
662 void idxd_unregister_devices(struct idxd_device *idxd);
663 void idxd_wqs_quiesce(struct idxd_device *idxd);
664 bool idxd_queue_int_handle_resubmit(struct idxd_desc *desc);
665 void multi_u64_to_bmap(unsigned long *bmap, u64 *val, int count);
666
667 /* device interrupt control */
668 irqreturn_t idxd_misc_thread(int vec, void *data);
669 irqreturn_t idxd_wq_thread(int irq, void *data);
670 void idxd_mask_error_interrupts(struct idxd_device *idxd);
671 void idxd_unmask_error_interrupts(struct idxd_device *idxd);
672
673 /* device control */
674 int idxd_device_drv_probe(struct idxd_dev *idxd_dev);
675 void idxd_device_drv_remove(struct idxd_dev *idxd_dev);
676 int drv_enable_wq(struct idxd_wq *wq);
677 void drv_disable_wq(struct idxd_wq *wq);
678 int idxd_device_init_reset(struct idxd_device *idxd);
679 int idxd_device_enable(struct idxd_device *idxd);
680 int idxd_device_disable(struct idxd_device *idxd);
681 void idxd_device_reset(struct idxd_device *idxd);
682 void idxd_device_clear_state(struct idxd_device *idxd);
683 int idxd_device_config(struct idxd_device *idxd);
684 void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid);
685 int idxd_device_load_config(struct idxd_device *idxd);
686 int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle,
687 enum idxd_interrupt_type irq_type);
688 int idxd_device_release_int_handle(struct idxd_device *idxd, int handle,
689 enum idxd_interrupt_type irq_type);
690
691 /* work queue control */
692 void idxd_wqs_unmap_portal(struct idxd_device *idxd);
693 int idxd_wq_alloc_resources(struct idxd_wq *wq);
694 void idxd_wq_free_resources(struct idxd_wq *wq);
695 int idxd_wq_enable(struct idxd_wq *wq);
696 int idxd_wq_disable(struct idxd_wq *wq, bool reset_config);
697 void idxd_wq_drain(struct idxd_wq *wq);
698 void idxd_wq_reset(struct idxd_wq *wq);
699 int idxd_wq_map_portal(struct idxd_wq *wq);
700 void idxd_wq_unmap_portal(struct idxd_wq *wq);
701 int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid);
702 int idxd_wq_disable_pasid(struct idxd_wq *wq);
703 void __idxd_wq_quiesce(struct idxd_wq *wq);
704 void idxd_wq_quiesce(struct idxd_wq *wq);
705 int idxd_wq_init_percpu_ref(struct idxd_wq *wq);
706 void idxd_wq_free_irq(struct idxd_wq *wq);
707 int idxd_wq_request_irq(struct idxd_wq *wq);
708
709 /* submission */
710 int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc);
711 struct idxd_desc *idxd_alloc_desc(struct idxd_wq *wq, enum idxd_op_type optype);
712 void idxd_free_desc(struct idxd_wq *wq, struct idxd_desc *desc);
713 int idxd_enqcmds(struct idxd_wq *wq, void __iomem *portal, const void *desc);
714
715 /* dmaengine */
716 int idxd_register_dma_device(struct idxd_device *idxd);
717 void idxd_unregister_dma_device(struct idxd_device *idxd);
718 void idxd_dma_complete_txd(struct idxd_desc *desc,
719 enum idxd_complete_type comp_type, bool free_desc);
720
721 /* cdev */
722 int idxd_cdev_register(void);
723 void idxd_cdev_remove(void);
724 int idxd_cdev_get_major(struct idxd_device *idxd);
725 int idxd_wq_add_cdev(struct idxd_wq *wq);
726 void idxd_wq_del_cdev(struct idxd_wq *wq);
727 int idxd_copy_cr(struct idxd_wq *wq, ioasid_t pasid, unsigned long addr,
728 void *buf, int len);
729 void idxd_user_counter_increment(struct idxd_wq *wq, u32 pasid, int index);
730
731 /* perfmon */
732 #if IS_ENABLED(CONFIG_INTEL_IDXD_PERFMON)
733 int perfmon_pmu_init(struct idxd_device *idxd);
734 void perfmon_pmu_remove(struct idxd_device *idxd);
735 void perfmon_counter_overflow(struct idxd_device *idxd);
736 void perfmon_init(void);
737 void perfmon_exit(void);
738 #else
perfmon_pmu_init(struct idxd_device * idxd)739 static inline int perfmon_pmu_init(struct idxd_device *idxd) { return 0; }
perfmon_pmu_remove(struct idxd_device * idxd)740 static inline void perfmon_pmu_remove(struct idxd_device *idxd) {}
perfmon_counter_overflow(struct idxd_device * idxd)741 static inline void perfmon_counter_overflow(struct idxd_device *idxd) {}
perfmon_init(void)742 static inline void perfmon_init(void) {}
perfmon_exit(void)743 static inline void perfmon_exit(void) {}
744 #endif
745
746 /* debugfs */
747 int idxd_device_init_debugfs(struct idxd_device *idxd);
748 void idxd_device_remove_debugfs(struct idxd_device *idxd);
749 int idxd_init_debugfs(void);
750 void idxd_remove_debugfs(void);
751
752 #endif
753
