2 * Copyright 2014 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
23 #include <linux/amd-iommu.h>
24 #include <linux/bsearch.h>
25 #include <linux/pci.h>
26 #include <linux/slab.h>
28 #include "kfd_device_queue_manager.h"
29 #include "kfd_pm4_headers.h"
31 #define MQD_SIZE_ALIGNED 768
33 static const struct kfd_device_info kaveri_device_info
= {
34 .asic_family
= CHIP_KAVERI
,
36 /* max num of queues for KV.TODO should be a dynamic value */
38 .ih_ring_entry_size
= 4 * sizeof(uint32_t),
39 .event_interrupt_class
= &event_interrupt_class_cik
,
40 .num_of_watch_points
= 4,
41 .mqd_size_aligned
= MQD_SIZE_ALIGNED
44 static const struct kfd_device_info carrizo_device_info
= {
45 .asic_family
= CHIP_CARRIZO
,
47 /* max num of queues for CZ.TODO should be a dynamic value */
49 .ih_ring_entry_size
= 4 * sizeof(uint32_t),
50 .event_interrupt_class
= &event_interrupt_class_cik
,
51 .num_of_watch_points
= 4,
52 .mqd_size_aligned
= MQD_SIZE_ALIGNED
57 const struct kfd_device_info
*device_info
;
60 /* Please keep this sorted by increasing device id. */
61 static const struct kfd_deviceid supported_devices
[] = {
62 { 0x1304, &kaveri_device_info
}, /* Kaveri */
63 { 0x1305, &kaveri_device_info
}, /* Kaveri */
64 { 0x1306, &kaveri_device_info
}, /* Kaveri */
65 { 0x1307, &kaveri_device_info
}, /* Kaveri */
66 { 0x1309, &kaveri_device_info
}, /* Kaveri */
67 { 0x130A, &kaveri_device_info
}, /* Kaveri */
68 { 0x130B, &kaveri_device_info
}, /* Kaveri */
69 { 0x130C, &kaveri_device_info
}, /* Kaveri */
70 { 0x130D, &kaveri_device_info
}, /* Kaveri */
71 { 0x130E, &kaveri_device_info
}, /* Kaveri */
72 { 0x130F, &kaveri_device_info
}, /* Kaveri */
73 { 0x1310, &kaveri_device_info
}, /* Kaveri */
74 { 0x1311, &kaveri_device_info
}, /* Kaveri */
75 { 0x1312, &kaveri_device_info
}, /* Kaveri */
76 { 0x1313, &kaveri_device_info
}, /* Kaveri */
77 { 0x1315, &kaveri_device_info
}, /* Kaveri */
78 { 0x1316, &kaveri_device_info
}, /* Kaveri */
79 { 0x1317, &kaveri_device_info
}, /* Kaveri */
80 { 0x1318, &kaveri_device_info
}, /* Kaveri */
81 { 0x131B, &kaveri_device_info
}, /* Kaveri */
82 { 0x131C, &kaveri_device_info
}, /* Kaveri */
83 { 0x131D, &kaveri_device_info
}, /* Kaveri */
84 { 0x9870, &carrizo_device_info
}, /* Carrizo */
85 { 0x9874, &carrizo_device_info
}, /* Carrizo */
86 { 0x9875, &carrizo_device_info
}, /* Carrizo */
87 { 0x9876, &carrizo_device_info
}, /* Carrizo */
88 { 0x9877, &carrizo_device_info
} /* Carrizo */
91 static int kfd_gtt_sa_init(struct kfd_dev
*kfd
, unsigned int buf_size
,
92 unsigned int chunk_size
);
93 static void kfd_gtt_sa_fini(struct kfd_dev
*kfd
);
95 static const struct kfd_device_info
*lookup_device_info(unsigned short did
)
99 for (i
= 0; i
< ARRAY_SIZE(supported_devices
); i
++) {
100 if (supported_devices
[i
].did
== did
) {
101 WARN_ON(!supported_devices
[i
].device_info
);
102 return supported_devices
[i
].device_info
;
106 dev_warn(kfd_device
, "DID %04x is missing in supported_devices\n",
112 struct kfd_dev
*kgd2kfd_probe(struct kgd_dev
*kgd
,
113 struct pci_dev
*pdev
, const struct kfd2kgd_calls
*f2g
)
117 const struct kfd_device_info
*device_info
=
118 lookup_device_info(pdev
->device
);
121 dev_err(kfd_device
, "kgd2kfd_probe failed\n");
125 kfd
= kzalloc(sizeof(*kfd
), GFP_KERNEL
);
130 kfd
->device_info
= device_info
;
132 kfd
->init_complete
= false;
135 mutex_init(&kfd
->doorbell_mutex
);
136 memset(&kfd
->doorbell_available_index
, 0,
137 sizeof(kfd
->doorbell_available_index
));
142 static bool device_iommu_pasid_init(struct kfd_dev
*kfd
)
144 const u32 required_iommu_flags
= AMD_IOMMU_DEVICE_FLAG_ATS_SUP
|
145 AMD_IOMMU_DEVICE_FLAG_PRI_SUP
|
146 AMD_IOMMU_DEVICE_FLAG_PASID_SUP
;
148 struct amd_iommu_device_info iommu_info
;
149 unsigned int pasid_limit
;
152 err
= amd_iommu_device_info(kfd
->pdev
, &iommu_info
);
155 "error getting iommu info. is the iommu enabled?\n");
159 if ((iommu_info
.flags
& required_iommu_flags
) != required_iommu_flags
) {
160 dev_err(kfd_device
, "error required iommu flags ats %i, pri %i, pasid %i\n",
161 (iommu_info
.flags
& AMD_IOMMU_DEVICE_FLAG_ATS_SUP
) != 0,
162 (iommu_info
.flags
& AMD_IOMMU_DEVICE_FLAG_PRI_SUP
) != 0,
163 (iommu_info
.flags
& AMD_IOMMU_DEVICE_FLAG_PASID_SUP
)
168 pasid_limit
= min_t(unsigned int,
169 (unsigned int)(1 << kfd
->device_info
->max_pasid_bits
),
170 iommu_info
.max_pasids
);
172 * last pasid is used for kernel queues doorbells
173 * in the future the last pasid might be used for a kernel thread.
175 pasid_limit
= min_t(unsigned int,
177 kfd
->doorbell_process_limit
- 1);
179 err
= amd_iommu_init_device(kfd
->pdev
, pasid_limit
);
181 dev_err(kfd_device
, "error initializing iommu device\n");
185 if (!kfd_set_pasid_limit(pasid_limit
)) {
186 dev_err(kfd_device
, "error setting pasid limit\n");
187 amd_iommu_free_device(kfd
->pdev
);
194 static void iommu_pasid_shutdown_callback(struct pci_dev
*pdev
, int pasid
)
196 struct kfd_dev
*dev
= kfd_device_by_pci_dev(pdev
);
199 kfd_unbind_process_from_device(dev
, pasid
);
203 * This function called by IOMMU driver on PPR failure
205 static int iommu_invalid_ppr_cb(struct pci_dev
*pdev
, int pasid
,
206 unsigned long address
, u16 flags
)
211 "Invalid PPR device %x:%x.%x pasid %d address 0x%lX flags 0x%X",
212 PCI_BUS_NUM(pdev
->devfn
),
213 PCI_SLOT(pdev
->devfn
),
214 PCI_FUNC(pdev
->devfn
),
219 dev
= kfd_device_by_pci_dev(pdev
);
221 kfd_signal_iommu_event(dev
, pasid
, address
,
222 flags
& PPR_FAULT_WRITE
, flags
& PPR_FAULT_EXEC
);
224 return AMD_IOMMU_INV_PRI_RSP_INVALID
;
227 bool kgd2kfd_device_init(struct kfd_dev
*kfd
,
228 const struct kgd2kfd_shared_resources
*gpu_resources
)
232 kfd
->shared_resources
= *gpu_resources
;
234 /* calculate max size of mqds needed for queues */
235 size
= max_num_of_queues_per_device
*
236 kfd
->device_info
->mqd_size_aligned
;
239 * calculate max size of runlist packet.
240 * There can be only 2 packets at once
242 size
+= (KFD_MAX_NUM_OF_PROCESSES
* sizeof(struct pm4_map_process
) +
243 max_num_of_queues_per_device
*
244 sizeof(struct pm4_map_queues
) + sizeof(struct pm4_runlist
)) * 2;
246 /* Add size of HIQ & DIQ */
247 size
+= KFD_KERNEL_QUEUE_SIZE
* 2;
249 /* add another 512KB for all other allocations on gart (HPD, fences) */
252 if (kfd
->kfd2kgd
->init_gtt_mem_allocation(
253 kfd
->kgd
, size
, &kfd
->gtt_mem
,
254 &kfd
->gtt_start_gpu_addr
, &kfd
->gtt_start_cpu_ptr
)){
255 dev_err(kfd_device
, "Could not allocate %d bytes\n", size
);
259 dev_info(kfd_device
, "Allocated %d bytes on gart\n", size
);
261 /* Initialize GTT sa with 512 byte chunk size */
262 if (kfd_gtt_sa_init(kfd
, size
, 512) != 0) {
263 dev_err(kfd_device
, "Error initializing gtt sub-allocator\n");
264 goto kfd_gtt_sa_init_error
;
267 if (kfd_doorbell_init(kfd
)) {
269 "Error initializing doorbell aperture\n");
270 goto kfd_doorbell_error
;
273 if (kfd_topology_add_device(kfd
)) {
274 dev_err(kfd_device
, "Error adding device to topology\n");
275 goto kfd_topology_add_device_error
;
278 if (kfd_interrupt_init(kfd
)) {
279 dev_err(kfd_device
, "Error initializing interrupts\n");
280 goto kfd_interrupt_error
;
283 if (!device_iommu_pasid_init(kfd
)) {
285 "Error initializing iommuv2 for device %x:%x\n",
286 kfd
->pdev
->vendor
, kfd
->pdev
->device
);
287 goto device_iommu_pasid_error
;
289 amd_iommu_set_invalidate_ctx_cb(kfd
->pdev
,
290 iommu_pasid_shutdown_callback
);
291 amd_iommu_set_invalid_ppr_cb(kfd
->pdev
, iommu_invalid_ppr_cb
);
293 kfd
->dqm
= device_queue_manager_init(kfd
);
295 dev_err(kfd_device
, "Error initializing queue manager\n");
296 goto device_queue_manager_error
;
299 if (kfd
->dqm
->ops
.start(kfd
->dqm
)) {
301 "Error starting queue manager for device %x:%x\n",
302 kfd
->pdev
->vendor
, kfd
->pdev
->device
);
303 goto dqm_start_error
;
308 kfd
->init_complete
= true;
309 dev_info(kfd_device
, "added device %x:%x\n", kfd
->pdev
->vendor
,
312 pr_debug("Starting kfd with the following scheduling policy %d\n",
318 device_queue_manager_uninit(kfd
->dqm
);
319 device_queue_manager_error
:
320 amd_iommu_free_device(kfd
->pdev
);
321 device_iommu_pasid_error
:
322 kfd_interrupt_exit(kfd
);
324 kfd_topology_remove_device(kfd
);
325 kfd_topology_add_device_error
:
326 kfd_doorbell_fini(kfd
);
328 kfd_gtt_sa_fini(kfd
);
329 kfd_gtt_sa_init_error
:
330 kfd
->kfd2kgd
->free_gtt_mem(kfd
->kgd
, kfd
->gtt_mem
);
332 "device %x:%x NOT added due to errors\n",
333 kfd
->pdev
->vendor
, kfd
->pdev
->device
);
335 return kfd
->init_complete
;
338 void kgd2kfd_device_exit(struct kfd_dev
*kfd
)
340 if (kfd
->init_complete
) {
341 device_queue_manager_uninit(kfd
->dqm
);
342 amd_iommu_free_device(kfd
->pdev
);
343 kfd_interrupt_exit(kfd
);
344 kfd_topology_remove_device(kfd
);
345 kfd_doorbell_fini(kfd
);
346 kfd_gtt_sa_fini(kfd
);
347 kfd
->kfd2kgd
->free_gtt_mem(kfd
->kgd
, kfd
->gtt_mem
);
353 void kgd2kfd_suspend(struct kfd_dev
*kfd
)
355 if (kfd
->init_complete
) {
356 kfd
->dqm
->ops
.stop(kfd
->dqm
);
357 amd_iommu_set_invalidate_ctx_cb(kfd
->pdev
, NULL
);
358 amd_iommu_set_invalid_ppr_cb(kfd
->pdev
, NULL
);
359 amd_iommu_free_device(kfd
->pdev
);
363 int kgd2kfd_resume(struct kfd_dev
*kfd
)
365 unsigned int pasid_limit
;
368 pasid_limit
= kfd_get_pasid_limit();
370 if (kfd
->init_complete
) {
371 err
= amd_iommu_init_device(kfd
->pdev
, pasid_limit
);
373 dev_err(kfd_device
, "failed to initialize iommu\n");
377 amd_iommu_set_invalidate_ctx_cb(kfd
->pdev
,
378 iommu_pasid_shutdown_callback
);
379 amd_iommu_set_invalid_ppr_cb(kfd
->pdev
, iommu_invalid_ppr_cb
);
380 kfd
->dqm
->ops
.start(kfd
->dqm
);
386 /* This is called directly from KGD at ISR. */
387 void kgd2kfd_interrupt(struct kfd_dev
*kfd
, const void *ih_ring_entry
)
389 if (!kfd
->init_complete
)
392 spin_lock(&kfd
->interrupt_lock
);
394 if (kfd
->interrupts_active
395 && interrupt_is_wanted(kfd
, ih_ring_entry
)
396 && enqueue_ih_ring_entry(kfd
, ih_ring_entry
))
397 schedule_work(&kfd
->interrupt_work
);
399 spin_unlock(&kfd
->interrupt_lock
);
402 static int kfd_gtt_sa_init(struct kfd_dev
*kfd
, unsigned int buf_size
,
403 unsigned int chunk_size
)
405 unsigned int num_of_longs
;
407 if (WARN_ON(buf_size
< chunk_size
))
409 if (WARN_ON(buf_size
== 0))
411 if (WARN_ON(chunk_size
== 0))
414 kfd
->gtt_sa_chunk_size
= chunk_size
;
415 kfd
->gtt_sa_num_of_chunks
= buf_size
/ chunk_size
;
417 num_of_longs
= (kfd
->gtt_sa_num_of_chunks
+ BITS_PER_LONG
- 1) /
420 kfd
->gtt_sa_bitmap
= kcalloc(num_of_longs
, sizeof(long), GFP_KERNEL
);
422 if (!kfd
->gtt_sa_bitmap
)
425 pr_debug("gtt_sa_num_of_chunks = %d, gtt_sa_bitmap = %p\n",
426 kfd
->gtt_sa_num_of_chunks
, kfd
->gtt_sa_bitmap
);
428 mutex_init(&kfd
->gtt_sa_lock
);
434 static void kfd_gtt_sa_fini(struct kfd_dev
*kfd
)
436 mutex_destroy(&kfd
->gtt_sa_lock
);
437 kfree(kfd
->gtt_sa_bitmap
);
440 static inline uint64_t kfd_gtt_sa_calc_gpu_addr(uint64_t start_addr
,
441 unsigned int bit_num
,
442 unsigned int chunk_size
)
444 return start_addr
+ bit_num
* chunk_size
;
447 static inline uint32_t *kfd_gtt_sa_calc_cpu_addr(void *start_addr
,
448 unsigned int bit_num
,
449 unsigned int chunk_size
)
451 return (uint32_t *) ((uint64_t) start_addr
+ bit_num
* chunk_size
);
454 int kfd_gtt_sa_allocate(struct kfd_dev
*kfd
, unsigned int size
,
455 struct kfd_mem_obj
**mem_obj
)
457 unsigned int found
, start_search
, cur_size
;
462 if (size
> kfd
->gtt_sa_num_of_chunks
* kfd
->gtt_sa_chunk_size
)
465 *mem_obj
= kmalloc(sizeof(struct kfd_mem_obj
), GFP_KERNEL
);
466 if ((*mem_obj
) == NULL
)
469 pr_debug("Allocated mem_obj = %p for size = %d\n", *mem_obj
, size
);
473 mutex_lock(&kfd
->gtt_sa_lock
);
475 kfd_gtt_restart_search
:
476 /* Find the first chunk that is free */
477 found
= find_next_zero_bit(kfd
->gtt_sa_bitmap
,
478 kfd
->gtt_sa_num_of_chunks
,
481 pr_debug("Found = %d\n", found
);
483 /* If there wasn't any free chunk, bail out */
484 if (found
== kfd
->gtt_sa_num_of_chunks
)
485 goto kfd_gtt_no_free_chunk
;
487 /* Update fields of mem_obj */
488 (*mem_obj
)->range_start
= found
;
489 (*mem_obj
)->range_end
= found
;
490 (*mem_obj
)->gpu_addr
= kfd_gtt_sa_calc_gpu_addr(
491 kfd
->gtt_start_gpu_addr
,
493 kfd
->gtt_sa_chunk_size
);
494 (*mem_obj
)->cpu_ptr
= kfd_gtt_sa_calc_cpu_addr(
495 kfd
->gtt_start_cpu_ptr
,
497 kfd
->gtt_sa_chunk_size
);
499 pr_debug("gpu_addr = %p, cpu_addr = %p\n",
500 (uint64_t *) (*mem_obj
)->gpu_addr
, (*mem_obj
)->cpu_ptr
);
502 /* If we need only one chunk, mark it as allocated and get out */
503 if (size
<= kfd
->gtt_sa_chunk_size
) {
504 pr_debug("Single bit\n");
505 set_bit(found
, kfd
->gtt_sa_bitmap
);
509 /* Otherwise, try to see if we have enough contiguous chunks */
510 cur_size
= size
- kfd
->gtt_sa_chunk_size
;
512 (*mem_obj
)->range_end
=
513 find_next_zero_bit(kfd
->gtt_sa_bitmap
,
514 kfd
->gtt_sa_num_of_chunks
, ++found
);
516 * If next free chunk is not contiguous than we need to
517 * restart our search from the last free chunk we found (which
518 * wasn't contiguous to the previous ones
520 if ((*mem_obj
)->range_end
!= found
) {
521 start_search
= found
;
522 goto kfd_gtt_restart_search
;
526 * If we reached end of buffer, bail out with error
528 if (found
== kfd
->gtt_sa_num_of_chunks
)
529 goto kfd_gtt_no_free_chunk
;
531 /* Check if we don't need another chunk */
532 if (cur_size
<= kfd
->gtt_sa_chunk_size
)
535 cur_size
-= kfd
->gtt_sa_chunk_size
;
537 } while (cur_size
> 0);
539 pr_debug("range_start = %d, range_end = %d\n",
540 (*mem_obj
)->range_start
, (*mem_obj
)->range_end
);
542 /* Mark the chunks as allocated */
543 for (found
= (*mem_obj
)->range_start
;
544 found
<= (*mem_obj
)->range_end
;
546 set_bit(found
, kfd
->gtt_sa_bitmap
);
549 mutex_unlock(&kfd
->gtt_sa_lock
);
552 kfd_gtt_no_free_chunk
:
553 pr_debug("Allocation failed with mem_obj = %p\n", mem_obj
);
554 mutex_unlock(&kfd
->gtt_sa_lock
);
559 int kfd_gtt_sa_free(struct kfd_dev
*kfd
, struct kfd_mem_obj
*mem_obj
)
563 /* Act like kfree when trying to free a NULL object */
567 pr_debug("Free mem_obj = %p, range_start = %d, range_end = %d\n",
568 mem_obj
, mem_obj
->range_start
, mem_obj
->range_end
);
570 mutex_lock(&kfd
->gtt_sa_lock
);
572 /* Mark the chunks as free */
573 for (bit
= mem_obj
->range_start
;
574 bit
<= mem_obj
->range_end
;
576 clear_bit(bit
, kfd
->gtt_sa_bitmap
);
578 mutex_unlock(&kfd
->gtt_sa_lock
);