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drm/tests: hdmi: Fix memory leaks in drm_display_mode_from_cea_vic()
[drm/drm-misc.git] / drivers / firmware / stratix10-svc.c
blob528f37417aea48532003125cb8eacebff312e160
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2017-2018, Intel Corporation
4 */
5
6 #include <linux/completion.h>
7 #include <linux/delay.h>
8 #include <linux/genalloc.h>
9 #include <linux/io.h>
10 #include <linux/kfifo.h>
11 #include <linux/kthread.h>
12 #include <linux/module.h>
13 #include <linux/mutex.h>
14 #include <linux/of.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/slab.h>
18 #include <linux/spinlock.h>
19 #include <linux/firmware/intel/stratix10-smc.h>
20 #include <linux/firmware/intel/stratix10-svc-client.h>
21 #include <linux/types.h>
22
23 /**
24 * SVC_NUM_DATA_IN_FIFO - number of struct stratix10_svc_data in the FIFO
25 *
26 * SVC_NUM_CHANNEL - number of channel supported by service layer driver
27 *
28 * FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS - claim back the submitted buffer(s)
29 * from the secure world for FPGA manager to reuse, or to free the buffer(s)
30 * when all bit-stream data had be send.
31 *
32 * FPGA_CONFIG_STATUS_TIMEOUT_SEC - poll the FPGA configuration status,
33 * service layer will return error to FPGA manager when timeout occurs,
34 * timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC.
35 */
36 #define SVC_NUM_DATA_IN_FIFO 32
37 #define SVC_NUM_CHANNEL 3
38 #define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS 200
39 #define FPGA_CONFIG_STATUS_TIMEOUT_SEC 30
40 #define BYTE_TO_WORD_SIZE 4
41
42 /* stratix10 service layer clients */
43 #define STRATIX10_RSU "stratix10-rsu"
44 #define INTEL_FCS "intel-fcs"
45
46 typedef void (svc_invoke_fn)(unsigned long, unsigned long, unsigned long,
47 unsigned long, unsigned long, unsigned long,
48 unsigned long, unsigned long,
49 struct arm_smccc_res *);
50 struct stratix10_svc_chan;
51
52 /**
53 * struct stratix10_svc - svc private data
54 * @stratix10_svc_rsu: pointer to stratix10 RSU device
55 */
56 struct stratix10_svc {
57 struct platform_device *stratix10_svc_rsu;
58 struct platform_device *intel_svc_fcs;
59 };
60
61 /**
62 * struct stratix10_svc_sh_memory - service shared memory structure
63 * @sync_complete: state for a completion
64 * @addr: physical address of shared memory block
65 * @size: size of shared memory block
66 * @invoke_fn: function to issue secure monitor or hypervisor call
67 *
68 * This struct is used to save physical address and size of shared memory
69 * block. The shared memory blocked is allocated by secure monitor software
70 * at secure world.
71 *
72 * Service layer driver uses the physical address and size to create a memory
73 * pool, then allocates data buffer from that memory pool for service client.
74 */
75 struct stratix10_svc_sh_memory {
76 struct completion sync_complete;
77 unsigned long addr;
78 unsigned long size;
79 svc_invoke_fn *invoke_fn;
80 };
81
82 /**
83 * struct stratix10_svc_data_mem - service memory structure
84 * @vaddr: virtual address
85 * @paddr: physical address
86 * @size: size of memory
87 * @node: link list head node
88 *
89 * This struct is used in a list that keeps track of buffers which have
90 * been allocated or freed from the memory pool. Service layer driver also
91 * uses this struct to transfer physical address to virtual address.
92 */
93 struct stratix10_svc_data_mem {
94 void *vaddr;
95 phys_addr_t paddr;
96 size_t size;
97 struct list_head node;
98 };
99
100 /**
101 * struct stratix10_svc_data - service data structure
102 * @chan: service channel
103 * @paddr: physical address of to be processed payload
104 * @size: to be processed playload size
105 * @paddr_output: physical address of processed payload
106 * @size_output: processed payload size
107 * @command: service command requested by client
108 * @flag: configuration type (full or partial)
109 * @arg: args to be passed via registers and not physically mapped buffers
110 *
111 * This struct is used in service FIFO for inter-process communication.
112 */
113 struct stratix10_svc_data {
114 struct stratix10_svc_chan *chan;
115 phys_addr_t paddr;
116 size_t size;
117 phys_addr_t paddr_output;
118 size_t size_output;
119 u32 command;
120 u32 flag;
121 u64 arg[3];
122 };
123
124 /**
125 * struct stratix10_svc_controller - service controller
126 * @dev: device
127 * @chans: array of service channels
128 * @num_chans: number of channels in 'chans' array
129 * @num_active_client: number of active service client
130 * @node: list management
131 * @genpool: memory pool pointing to the memory region
132 * @task: pointer to the thread task which handles SMC or HVC call
133 * @svc_fifo: a queue for storing service message data
134 * @complete_status: state for completion
135 * @svc_fifo_lock: protect access to service message data queue
136 * @invoke_fn: function to issue secure monitor call or hypervisor call
137 *
138 * This struct is used to create communication channels for service clients, to
139 * handle secure monitor or hypervisor call.
140 */
141 struct stratix10_svc_controller {
142 struct device *dev;
143 struct stratix10_svc_chan *chans;
144 int num_chans;
145 int num_active_client;
146 struct list_head node;
147 struct gen_pool *genpool;
148 struct task_struct *task;
149 struct kfifo svc_fifo;
150 struct completion complete_status;
151 spinlock_t svc_fifo_lock;
152 svc_invoke_fn *invoke_fn;
153 };
154
155 /**
156 * struct stratix10_svc_chan - service communication channel
157 * @ctrl: pointer to service controller which is the provider of this channel
158 * @scl: pointer to service client which owns the channel
159 * @name: service client name associated with the channel
160 * @lock: protect access to the channel
161 *
162 * This struct is used by service client to communicate with service layer, each
163 * service client has its own channel created by service controller.
164 */
165 struct stratix10_svc_chan {
166 struct stratix10_svc_controller *ctrl;
167 struct stratix10_svc_client *scl;
168 char *name;
169 spinlock_t lock;
170 };
171
172 static LIST_HEAD(svc_ctrl);
173 static LIST_HEAD(svc_data_mem);
174
175 /**
176 * svc_pa_to_va() - translate physical address to virtual address
177 * @addr: to be translated physical address
178 *
179 * Return: valid virtual address or NULL if the provided physical
180 * address doesn't exist.
181 */
182 static void *svc_pa_to_va(unsigned long addr)
183 {
184 struct stratix10_svc_data_mem *pmem;
185
186 pr_debug("claim back P-addr=0x%016x\n", (unsigned int)addr);
187 list_for_each_entry(pmem, &svc_data_mem, node)
188 if (pmem->paddr == addr)
189 return pmem->vaddr;
190
191 /* physical address is not found */
192 return NULL;
193 }
194
195 /**
196 * svc_thread_cmd_data_claim() - claim back buffer from the secure world
197 * @ctrl: pointer to service layer controller
198 * @p_data: pointer to service data structure
199 * @cb_data: pointer to callback data structure to service client
200 *
201 * Claim back the submitted buffers from the secure world and pass buffer
202 * back to service client (FPGA manager, etc) for reuse.
203 */
204 static void svc_thread_cmd_data_claim(struct stratix10_svc_controller *ctrl,
205 struct stratix10_svc_data *p_data,
206 struct stratix10_svc_cb_data *cb_data)
207 {
208 struct arm_smccc_res res;
209 unsigned long timeout;
210
211 reinit_completion(&ctrl->complete_status);
212 timeout = msecs_to_jiffies(FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS);
213
214 pr_debug("%s: claim back the submitted buffer\n", __func__);
215 do {
216 ctrl->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE,
217 0, 0, 0, 0, 0, 0, 0, &res);
218
219 if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
220 if (!res.a1) {
221 complete(&ctrl->complete_status);
222 break;
223 }
224 cb_data->status = BIT(SVC_STATUS_BUFFER_DONE);
225 cb_data->kaddr1 = svc_pa_to_va(res.a1);
226 cb_data->kaddr2 = (res.a2) ?
227 svc_pa_to_va(res.a2) : NULL;
228 cb_data->kaddr3 = (res.a3) ?
229 svc_pa_to_va(res.a3) : NULL;
230 p_data->chan->scl->receive_cb(p_data->chan->scl,
231 cb_data);
232 } else {
233 pr_debug("%s: secure world busy, polling again\n",
234 __func__);
235 }
236 } while (res.a0 == INTEL_SIP_SMC_STATUS_OK ||
237 res.a0 == INTEL_SIP_SMC_STATUS_BUSY ||
238 wait_for_completion_timeout(&ctrl->complete_status, timeout));
239 }
240
241 /**
242 * svc_thread_cmd_config_status() - check configuration status
243 * @ctrl: pointer to service layer controller
244 * @p_data: pointer to service data structure
245 * @cb_data: pointer to callback data structure to service client
246 *
247 * Check whether the secure firmware at secure world has finished the FPGA
248 * configuration, and then inform FPGA manager the configuration status.
249 */
250 static void svc_thread_cmd_config_status(struct stratix10_svc_controller *ctrl,
251 struct stratix10_svc_data *p_data,
252 struct stratix10_svc_cb_data *cb_data)
253 {
254 struct arm_smccc_res res;
255 int count_in_sec;
256 unsigned long a0, a1, a2;
257
258 cb_data->kaddr1 = NULL;
259 cb_data->kaddr2 = NULL;
260 cb_data->kaddr3 = NULL;
261 cb_data->status = BIT(SVC_STATUS_ERROR);
262
263 pr_debug("%s: polling config status\n", __func__);
264
265 a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
266 a1 = (unsigned long)p_data->paddr;
267 a2 = (unsigned long)p_data->size;
268
269 if (p_data->command == COMMAND_POLL_SERVICE_STATUS)
270 a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
271
272 count_in_sec = FPGA_CONFIG_STATUS_TIMEOUT_SEC;
273 while (count_in_sec) {
274 ctrl->invoke_fn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
275 if ((res.a0 == INTEL_SIP_SMC_STATUS_OK) ||
276 (res.a0 == INTEL_SIP_SMC_STATUS_ERROR) ||
277 (res.a0 == INTEL_SIP_SMC_STATUS_REJECTED))
278 break;
279
280 /*
281 * request is still in progress, wait one second then
282 * poll again
283 */
284 msleep(1000);
285 count_in_sec--;
286 }
287
288 if (!count_in_sec) {
289 pr_err("%s: poll status timeout\n", __func__);
290 cb_data->status = BIT(SVC_STATUS_BUSY);
291 } else if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
292 cb_data->status = BIT(SVC_STATUS_COMPLETED);
293 cb_data->kaddr2 = (res.a2) ?
294 svc_pa_to_va(res.a2) : NULL;
295 cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
296 } else {
297 pr_err("%s: poll status error\n", __func__);
298 cb_data->kaddr1 = &res.a1;
299 cb_data->kaddr2 = (res.a2) ?
300 svc_pa_to_va(res.a2) : NULL;
301 cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
302 cb_data->status = BIT(SVC_STATUS_ERROR);
303 }
304
305 p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
306 }
307
308 /**
309 * svc_thread_recv_status_ok() - handle the successful status
310 * @p_data: pointer to service data structure
311 * @cb_data: pointer to callback data structure to service client
312 * @res: result from SMC or HVC call
313 *
314 * Send back the correspond status to the service clients.
315 */
316 static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
317 struct stratix10_svc_cb_data *cb_data,
318 struct arm_smccc_res res)
319 {
320 cb_data->kaddr1 = NULL;
321 cb_data->kaddr2 = NULL;
322 cb_data->kaddr3 = NULL;
323
324 switch (p_data->command) {
325 case COMMAND_RECONFIG:
326 case COMMAND_RSU_UPDATE:
327 case COMMAND_RSU_NOTIFY:
328 case COMMAND_FCS_REQUEST_SERVICE:
329 case COMMAND_FCS_SEND_CERTIFICATE:
330 case COMMAND_FCS_DATA_ENCRYPTION:
331 case COMMAND_FCS_DATA_DECRYPTION:
332 cb_data->status = BIT(SVC_STATUS_OK);
333 break;
334 case COMMAND_RECONFIG_DATA_SUBMIT:
335 cb_data->status = BIT(SVC_STATUS_BUFFER_SUBMITTED);
336 break;
337 case COMMAND_RECONFIG_STATUS:
338 cb_data->status = BIT(SVC_STATUS_COMPLETED);
339 break;
340 case COMMAND_RSU_RETRY:
341 case COMMAND_RSU_MAX_RETRY:
342 case COMMAND_RSU_DCMF_STATUS:
343 case COMMAND_FIRMWARE_VERSION:
344 cb_data->status = BIT(SVC_STATUS_OK);
345 cb_data->kaddr1 = &res.a1;
346 break;
347 case COMMAND_SMC_SVC_VERSION:
348 cb_data->status = BIT(SVC_STATUS_OK);
349 cb_data->kaddr1 = &res.a1;
350 cb_data->kaddr2 = &res.a2;
351 break;
352 case COMMAND_RSU_DCMF_VERSION:
353 cb_data->status = BIT(SVC_STATUS_OK);
354 cb_data->kaddr1 = &res.a1;
355 cb_data->kaddr2 = &res.a2;
356 break;
357 case COMMAND_FCS_RANDOM_NUMBER_GEN:
358 case COMMAND_FCS_GET_PROVISION_DATA:
359 case COMMAND_POLL_SERVICE_STATUS:
360 cb_data->status = BIT(SVC_STATUS_OK);
361 cb_data->kaddr1 = &res.a1;
362 cb_data->kaddr2 = svc_pa_to_va(res.a2);
363 cb_data->kaddr3 = &res.a3;
364 break;
365 case COMMAND_MBOX_SEND_CMD:
366 cb_data->status = BIT(SVC_STATUS_OK);
367 cb_data->kaddr1 = &res.a1;
368 /* SDM return size in u8. Convert size to u32 word */
369 res.a2 = res.a2 * BYTE_TO_WORD_SIZE;
370 cb_data->kaddr2 = &res.a2;
371 break;
372 default:
373 pr_warn("it shouldn't happen\n");
374 break;
375 }
376
377 pr_debug("%s: call receive_cb\n", __func__);
378 p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
379 }
380
381 /**
382 * svc_normal_to_secure_thread() - the function to run in the kthread
383 * @data: data pointer for kthread function
384 *
385 * Service layer driver creates stratix10_svc_smc_hvc_call kthread on CPU
386 * node 0, its function stratix10_svc_secure_call_thread is used to handle
387 * SMC or HVC calls between kernel driver and secure monitor software.
388 *
389 * Return: 0 for success or -ENOMEM on error.
390 */
391 static int svc_normal_to_secure_thread(void *data)
392 {
393 struct stratix10_svc_controller
394 *ctrl = (struct stratix10_svc_controller *)data;
395 struct stratix10_svc_data *pdata;
396 struct stratix10_svc_cb_data *cbdata;
397 struct arm_smccc_res res;
398 unsigned long a0, a1, a2, a3, a4, a5, a6, a7;
399 int ret_fifo = 0;
400
401 pdata = kmalloc(sizeof(*pdata), GFP_KERNEL);
402 if (!pdata)
403 return -ENOMEM;
404
405 cbdata = kmalloc(sizeof(*cbdata), GFP_KERNEL);
406 if (!cbdata) {
407 kfree(pdata);
408 return -ENOMEM;
409 }
410
411 /* default set, to remove build warning */
412 a0 = INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK;
413 a1 = 0;
414 a2 = 0;
415 a3 = 0;
416 a4 = 0;
417 a5 = 0;
418 a6 = 0;
419 a7 = 0;
420
421 pr_debug("smc_hvc_shm_thread is running\n");
422
423 while (!kthread_should_stop()) {
424 ret_fifo = kfifo_out_spinlocked(&ctrl->svc_fifo,
425 pdata, sizeof(*pdata),
426 &ctrl->svc_fifo_lock);
427
428 if (!ret_fifo)
429 continue;
430
431 pr_debug("get from FIFO pa=0x%016x, command=%u, size=%u\n",
432 (unsigned int)pdata->paddr, pdata->command,
433 (unsigned int)pdata->size);
434
435 switch (pdata->command) {
436 case COMMAND_RECONFIG_DATA_CLAIM:
437 svc_thread_cmd_data_claim(ctrl, pdata, cbdata);
438 continue;
439 case COMMAND_RECONFIG:
440 a0 = INTEL_SIP_SMC_FPGA_CONFIG_START;
441 pr_debug("conf_type=%u\n", (unsigned int)pdata->flag);
442 a1 = pdata->flag;
443 a2 = 0;
444 break;
445 case COMMAND_RECONFIG_DATA_SUBMIT:
446 a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE;
447 a1 = (unsigned long)pdata->paddr;
448 a2 = (unsigned long)pdata->size;
449 break;
450 case COMMAND_RECONFIG_STATUS:
451 a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
452 a1 = 0;
453 a2 = 0;
454 break;
455 case COMMAND_RSU_STATUS:
456 a0 = INTEL_SIP_SMC_RSU_STATUS;
457 a1 = 0;
458 a2 = 0;
459 break;
460 case COMMAND_RSU_UPDATE:
461 a0 = INTEL_SIP_SMC_RSU_UPDATE;
462 a1 = pdata->arg[0];
463 a2 = 0;
464 break;
465 case COMMAND_RSU_NOTIFY:
466 a0 = INTEL_SIP_SMC_RSU_NOTIFY;
467 a1 = pdata->arg[0];
468 a2 = 0;
469 break;
470 case COMMAND_RSU_RETRY:
471 a0 = INTEL_SIP_SMC_RSU_RETRY_COUNTER;
472 a1 = 0;
473 a2 = 0;
474 break;
475 case COMMAND_RSU_MAX_RETRY:
476 a0 = INTEL_SIP_SMC_RSU_MAX_RETRY;
477 a1 = 0;
478 a2 = 0;
479 break;
480 case COMMAND_RSU_DCMF_VERSION:
481 a0 = INTEL_SIP_SMC_RSU_DCMF_VERSION;
482 a1 = 0;
483 a2 = 0;
484 break;
485 case COMMAND_FIRMWARE_VERSION:
486 a0 = INTEL_SIP_SMC_FIRMWARE_VERSION;
487 a1 = 0;
488 a2 = 0;
489 break;
490
491 /* for FCS */
492 case COMMAND_FCS_DATA_ENCRYPTION:
493 a0 = INTEL_SIP_SMC_FCS_CRYPTION;
494 a1 = 1;
495 a2 = (unsigned long)pdata->paddr;
496 a3 = (unsigned long)pdata->size;
497 a4 = (unsigned long)pdata->paddr_output;
498 a5 = (unsigned long)pdata->size_output;
499 break;
500 case COMMAND_FCS_DATA_DECRYPTION:
501 a0 = INTEL_SIP_SMC_FCS_CRYPTION;
502 a1 = 0;
503 a2 = (unsigned long)pdata->paddr;
504 a3 = (unsigned long)pdata->size;
505 a4 = (unsigned long)pdata->paddr_output;
506 a5 = (unsigned long)pdata->size_output;
507 break;
508 case COMMAND_FCS_RANDOM_NUMBER_GEN:
509 a0 = INTEL_SIP_SMC_FCS_RANDOM_NUMBER;
510 a1 = (unsigned long)pdata->paddr;
511 a2 = 0;
512 break;
513 case COMMAND_FCS_REQUEST_SERVICE:
514 a0 = INTEL_SIP_SMC_FCS_SERVICE_REQUEST;
515 a1 = (unsigned long)pdata->paddr;
516 a2 = (unsigned long)pdata->size;
517 break;
518 case COMMAND_FCS_SEND_CERTIFICATE:
519 a0 = INTEL_SIP_SMC_FCS_SEND_CERTIFICATE;
520 a1 = (unsigned long)pdata->paddr;
521 a2 = (unsigned long)pdata->size;
522 break;
523 case COMMAND_FCS_GET_PROVISION_DATA:
524 a0 = INTEL_SIP_SMC_FCS_GET_PROVISION_DATA;
525 a1 = (unsigned long)pdata->paddr;
526 a2 = 0;
527 break;
528
529 /* for polling */
530 case COMMAND_POLL_SERVICE_STATUS:
531 a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
532 a1 = (unsigned long)pdata->paddr;
533 a2 = (unsigned long)pdata->size;
534 break;
535 case COMMAND_RSU_DCMF_STATUS:
536 a0 = INTEL_SIP_SMC_RSU_DCMF_STATUS;
537 a1 = 0;
538 a2 = 0;
539 break;
540 case COMMAND_SMC_SVC_VERSION:
541 a0 = INTEL_SIP_SMC_SVC_VERSION;
542 a1 = 0;
543 a2 = 0;
544 break;
545 case COMMAND_MBOX_SEND_CMD:
546 a0 = INTEL_SIP_SMC_MBOX_SEND_CMD;
547 a1 = pdata->arg[0];
548 a2 = (unsigned long)pdata->paddr;
549 a3 = (unsigned long)pdata->size / BYTE_TO_WORD_SIZE;
550 a4 = pdata->arg[1];
551 a5 = (unsigned long)pdata->paddr_output;
552 a6 = (unsigned long)pdata->size_output / BYTE_TO_WORD_SIZE;
553 break;
554 default:
555 pr_warn("it shouldn't happen\n");
556 break;
557 }
558 pr_debug("%s: before SMC call -- a0=0x%016x a1=0x%016x",
559 __func__,
560 (unsigned int)a0,
561 (unsigned int)a1);
562 pr_debug(" a2=0x%016x\n", (unsigned int)a2);
563 pr_debug(" a3=0x%016x\n", (unsigned int)a3);
564 pr_debug(" a4=0x%016x\n", (unsigned int)a4);
565 pr_debug(" a5=0x%016x\n", (unsigned int)a5);
566 ctrl->invoke_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res);
567
568 pr_debug("%s: after SMC call -- res.a0=0x%016x",
569 __func__, (unsigned int)res.a0);
570 pr_debug(" res.a1=0x%016x, res.a2=0x%016x",
571 (unsigned int)res.a1, (unsigned int)res.a2);
572 pr_debug(" res.a3=0x%016x\n", (unsigned int)res.a3);
573
574 if (pdata->command == COMMAND_RSU_STATUS) {
575 if (res.a0 == INTEL_SIP_SMC_RSU_ERROR)
576 cbdata->status = BIT(SVC_STATUS_ERROR);
577 else
578 cbdata->status = BIT(SVC_STATUS_OK);
579
580 cbdata->kaddr1 = &res;
581 cbdata->kaddr2 = NULL;
582 cbdata->kaddr3 = NULL;
583 pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
584 continue;
585 }
586
587 switch (res.a0) {
588 case INTEL_SIP_SMC_STATUS_OK:
589 svc_thread_recv_status_ok(pdata, cbdata, res);
590 break;
591 case INTEL_SIP_SMC_STATUS_BUSY:
592 switch (pdata->command) {
593 case COMMAND_RECONFIG_DATA_SUBMIT:
594 svc_thread_cmd_data_claim(ctrl,
595 pdata, cbdata);
596 break;
597 case COMMAND_RECONFIG_STATUS:
598 case COMMAND_POLL_SERVICE_STATUS:
599 svc_thread_cmd_config_status(ctrl,
600 pdata, cbdata);
601 break;
602 default:
603 pr_warn("it shouldn't happen\n");
604 break;
605 }
606 break;
607 case INTEL_SIP_SMC_STATUS_REJECTED:
608 pr_debug("%s: STATUS_REJECTED\n", __func__);
609 /* for FCS */
610 switch (pdata->command) {
611 case COMMAND_FCS_REQUEST_SERVICE:
612 case COMMAND_FCS_SEND_CERTIFICATE:
613 case COMMAND_FCS_GET_PROVISION_DATA:
614 case COMMAND_FCS_DATA_ENCRYPTION:
615 case COMMAND_FCS_DATA_DECRYPTION:
616 case COMMAND_FCS_RANDOM_NUMBER_GEN:
617 case COMMAND_MBOX_SEND_CMD:
618 cbdata->status = BIT(SVC_STATUS_INVALID_PARAM);
619 cbdata->kaddr1 = NULL;
620 cbdata->kaddr2 = NULL;
621 cbdata->kaddr3 = NULL;
622 pdata->chan->scl->receive_cb(pdata->chan->scl,
623 cbdata);
624 break;
625 }
626 break;
627 case INTEL_SIP_SMC_STATUS_ERROR:
628 case INTEL_SIP_SMC_RSU_ERROR:
629 pr_err("%s: STATUS_ERROR\n", __func__);
630 cbdata->status = BIT(SVC_STATUS_ERROR);
631 cbdata->kaddr1 = &res.a1;
632 cbdata->kaddr2 = (res.a2) ?
633 svc_pa_to_va(res.a2) : NULL;
634 cbdata->kaddr3 = (res.a3) ? &res.a3 : NULL;
635 pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
636 break;
637 default:
638 pr_warn("Secure firmware doesn't support...\n");
639
640 /*
641 * be compatible with older version firmware which
642 * doesn't support newer RSU commands
643 */
644 if ((pdata->command != COMMAND_RSU_UPDATE) &&
645 (pdata->command != COMMAND_RSU_STATUS)) {
646 cbdata->status =
647 BIT(SVC_STATUS_NO_SUPPORT);
648 cbdata->kaddr1 = NULL;
649 cbdata->kaddr2 = NULL;
650 cbdata->kaddr3 = NULL;
651 pdata->chan->scl->receive_cb(
652 pdata->chan->scl, cbdata);
653 }
654 break;
655
656 }
657 }
658
659 kfree(cbdata);
660 kfree(pdata);
661
662 return 0;
663 }
664
665 /**
666 * svc_normal_to_secure_shm_thread() - the function to run in the kthread
667 * @data: data pointer for kthread function
668 *
669 * Service layer driver creates stratix10_svc_smc_hvc_shm kthread on CPU
670 * node 0, its function stratix10_svc_secure_shm_thread is used to query the
671 * physical address of memory block reserved by secure monitor software at
672 * secure world.
673 *
674 * svc_normal_to_secure_shm_thread() terminates directly since it is a
675 * standlone thread for which no one will call kthread_stop() or return when
676 * 'kthread_should_stop()' is true.
677 */
678 static int svc_normal_to_secure_shm_thread(void *data)
679 {
680 struct stratix10_svc_sh_memory
681 *sh_mem = (struct stratix10_svc_sh_memory *)data;
682 struct arm_smccc_res res;
683
684 /* SMC or HVC call to get shared memory info from secure world */
685 sh_mem->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM,
686 0, 0, 0, 0, 0, 0, 0, &res);
687 if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
688 sh_mem->addr = res.a1;
689 sh_mem->size = res.a2;
690 } else {
691 pr_err("%s: after SMC call -- res.a0=0x%016x", __func__,
692 (unsigned int)res.a0);
693 sh_mem->addr = 0;
694 sh_mem->size = 0;
695 }
696
697 complete(&sh_mem->sync_complete);
698 return 0;
699 }
700
701 /**
702 * svc_get_sh_memory() - get memory block reserved by secure monitor SW
703 * @pdev: pointer to service layer device
704 * @sh_memory: pointer to service shared memory structure
705 *
706 * Return: zero for successfully getting the physical address of memory block
707 * reserved by secure monitor software, or negative value on error.
708 */
709 static int svc_get_sh_memory(struct platform_device *pdev,
710 struct stratix10_svc_sh_memory *sh_memory)
711 {
712 struct device *dev = &pdev->dev;
713 struct task_struct *sh_memory_task;
714 unsigned int cpu = 0;
715
716 init_completion(&sh_memory->sync_complete);
717
718 /* smc or hvc call happens on cpu 0 bound kthread */
719 sh_memory_task = kthread_create_on_node(svc_normal_to_secure_shm_thread,
720 (void *)sh_memory,
721 cpu_to_node(cpu),
722 "svc_smc_hvc_shm_thread");
723 if (IS_ERR(sh_memory_task)) {
724 dev_err(dev, "fail to create stratix10_svc_smc_shm_thread\n");
725 return -EINVAL;
726 }
727
728 wake_up_process(sh_memory_task);
729
730 if (!wait_for_completion_timeout(&sh_memory->sync_complete, 10 * HZ)) {
731 dev_err(dev,
732 "timeout to get sh-memory paras from secure world\n");
733 return -ETIMEDOUT;
734 }
735
736 if (!sh_memory->addr || !sh_memory->size) {
737 dev_err(dev,
738 "failed to get shared memory info from secure world\n");
739 return -ENOMEM;
740 }
741
742 dev_dbg(dev, "SM software provides paddr: 0x%016x, size: 0x%08x\n",
743 (unsigned int)sh_memory->addr,
744 (unsigned int)sh_memory->size);
745
746 return 0;
747 }
748
749 /**
750 * svc_create_memory_pool() - create a memory pool from reserved memory block
751 * @pdev: pointer to service layer device
752 * @sh_memory: pointer to service shared memory structure
753 *
754 * Return: pool allocated from reserved memory block or ERR_PTR() on error.
755 */
756 static struct gen_pool *
757 svc_create_memory_pool(struct platform_device *pdev,
758 struct stratix10_svc_sh_memory *sh_memory)
759 {
760 struct device *dev = &pdev->dev;
761 struct gen_pool *genpool;
762 unsigned long vaddr;
763 phys_addr_t paddr;
764 size_t size;
765 phys_addr_t begin;
766 phys_addr_t end;
767 void *va;
768 size_t page_mask = PAGE_SIZE - 1;
769 int min_alloc_order = 3;
770 int ret;
771
772 begin = roundup(sh_memory->addr, PAGE_SIZE);
773 end = rounddown(sh_memory->addr + sh_memory->size, PAGE_SIZE);
774 paddr = begin;
775 size = end - begin;
776 va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
777 if (IS_ERR(va)) {
778 dev_err(dev, "fail to remap shared memory\n");
779 return ERR_PTR(-EINVAL);
780 }
781 vaddr = (unsigned long)va;
782 dev_dbg(dev,
783 "reserved memory vaddr: %p, paddr: 0x%16x size: 0x%8x\n",
784 va, (unsigned int)paddr, (unsigned int)size);
785 if ((vaddr & page_mask) || (paddr & page_mask) ||
786 (size & page_mask)) {
787 dev_err(dev, "page is not aligned\n");
788 return ERR_PTR(-EINVAL);
789 }
790 genpool = gen_pool_create(min_alloc_order, -1);
791 if (!genpool) {
792 dev_err(dev, "fail to create genpool\n");
793 return ERR_PTR(-ENOMEM);
794 }
795 gen_pool_set_algo(genpool, gen_pool_best_fit, NULL);
796 ret = gen_pool_add_virt(genpool, vaddr, paddr, size, -1);
797 if (ret) {
798 dev_err(dev, "fail to add memory chunk to the pool\n");
799 gen_pool_destroy(genpool);
800 return ERR_PTR(ret);
801 }
802
803 return genpool;
804 }
805
806 /**
807 * svc_smccc_smc() - secure monitor call between normal and secure world
808 * @a0: argument passed in registers 0
809 * @a1: argument passed in registers 1
810 * @a2: argument passed in registers 2
811 * @a3: argument passed in registers 3
812 * @a4: argument passed in registers 4
813 * @a5: argument passed in registers 5
814 * @a6: argument passed in registers 6
815 * @a7: argument passed in registers 7
816 * @res: result values from register 0 to 3
817 */
818 static void svc_smccc_smc(unsigned long a0, unsigned long a1,
819 unsigned long a2, unsigned long a3,
820 unsigned long a4, unsigned long a5,
821 unsigned long a6, unsigned long a7,
822 struct arm_smccc_res *res)
823 {
824 arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
825 }
826
827 /**
828 * svc_smccc_hvc() - hypervisor call between normal and secure world
829 * @a0: argument passed in registers 0
830 * @a1: argument passed in registers 1
831 * @a2: argument passed in registers 2
832 * @a3: argument passed in registers 3
833 * @a4: argument passed in registers 4
834 * @a5: argument passed in registers 5
835 * @a6: argument passed in registers 6
836 * @a7: argument passed in registers 7
837 * @res: result values from register 0 to 3
838 */
839 static void svc_smccc_hvc(unsigned long a0, unsigned long a1,
840 unsigned long a2, unsigned long a3,
841 unsigned long a4, unsigned long a5,
842 unsigned long a6, unsigned long a7,
843 struct arm_smccc_res *res)
844 {
845 arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
846 }
847
848 /**
849 * get_invoke_func() - invoke SMC or HVC call
850 * @dev: pointer to device
851 *
852 * Return: function pointer to svc_smccc_smc or svc_smccc_hvc.
853 */
854 static svc_invoke_fn *get_invoke_func(struct device *dev)
855 {
856 const char *method;
857
858 if (of_property_read_string(dev->of_node, "method", &method)) {
859 dev_warn(dev, "missing \"method\" property\n");
860 return ERR_PTR(-ENXIO);
861 }
862
863 if (!strcmp(method, "smc"))
864 return svc_smccc_smc;
865 if (!strcmp(method, "hvc"))
866 return svc_smccc_hvc;
867
868 dev_warn(dev, "invalid \"method\" property: %s\n", method);
869
870 return ERR_PTR(-EINVAL);
871 }
872
873 /**
874 * stratix10_svc_request_channel_byname() - request a service channel
875 * @client: pointer to service client
876 * @name: service client name
877 *
878 * This function is used by service client to request a service channel.
879 *
880 * Return: a pointer to channel assigned to the client on success,
881 * or ERR_PTR() on error.
882 */
883 struct stratix10_svc_chan *stratix10_svc_request_channel_byname(
884 struct stratix10_svc_client *client, const char *name)
885 {
886 struct device *dev = client->dev;
887 struct stratix10_svc_controller *controller;
888 struct stratix10_svc_chan *chan = NULL;
889 unsigned long flag;
890 int i;
891
892 /* if probe was called after client's, or error on probe */
893 if (list_empty(&svc_ctrl))
894 return ERR_PTR(-EPROBE_DEFER);
895
896 controller = list_first_entry(&svc_ctrl,
897 struct stratix10_svc_controller, node);
898 for (i = 0; i < SVC_NUM_CHANNEL; i++) {
899 if (!strcmp(controller->chans[i].name, name)) {
900 chan = &controller->chans[i];
901 break;
902 }
903 }
904
905 /* if there was no channel match */
906 if (i == SVC_NUM_CHANNEL) {
907 dev_err(dev, "%s: channel not allocated\n", __func__);
908 return ERR_PTR(-EINVAL);
909 }
910
911 if (chan->scl || !try_module_get(controller->dev->driver->owner)) {
912 dev_dbg(dev, "%s: svc not free\n", __func__);
913 return ERR_PTR(-EBUSY);
914 }
915
916 spin_lock_irqsave(&chan->lock, flag);
917 chan->scl = client;
918 chan->ctrl->num_active_client++;
919 spin_unlock_irqrestore(&chan->lock, flag);
920
921 return chan;
922 }
923 EXPORT_SYMBOL_GPL(stratix10_svc_request_channel_byname);
924
925 /**
926 * stratix10_svc_free_channel() - free service channel
927 * @chan: service channel to be freed
928 *
929 * This function is used by service client to free a service channel.
930 */
931 void stratix10_svc_free_channel(struct stratix10_svc_chan *chan)
932 {
933 unsigned long flag;
934
935 spin_lock_irqsave(&chan->lock, flag);
936 chan->scl = NULL;
937 chan->ctrl->num_active_client--;
938 module_put(chan->ctrl->dev->driver->owner);
939 spin_unlock_irqrestore(&chan->lock, flag);
940 }
941 EXPORT_SYMBOL_GPL(stratix10_svc_free_channel);
942
943 /**
944 * stratix10_svc_send() - send a message data to the remote
945 * @chan: service channel assigned to the client
946 * @msg: message data to be sent, in the format of
947 * "struct stratix10_svc_client_msg"
948 *
949 * This function is used by service client to add a message to the service
950 * layer driver's queue for being sent to the secure world.
951 *
952 * Return: 0 for success, -ENOMEM or -ENOBUFS on error.
953 */
954 int stratix10_svc_send(struct stratix10_svc_chan *chan, void *msg)
955 {
956 struct stratix10_svc_client_msg
957 *p_msg = (struct stratix10_svc_client_msg *)msg;
958 struct stratix10_svc_data_mem *p_mem;
959 struct stratix10_svc_data *p_data;
960 int ret = 0;
961 unsigned int cpu = 0;
962
963 p_data = kzalloc(sizeof(*p_data), GFP_KERNEL);
964 if (!p_data)
965 return -ENOMEM;
966
967 /* first client will create kernel thread */
968 if (!chan->ctrl->task) {
969 chan->ctrl->task =
970 kthread_create_on_node(svc_normal_to_secure_thread,
971 (void *)chan->ctrl,
972 cpu_to_node(cpu),
973 "svc_smc_hvc_thread");
974 if (IS_ERR(chan->ctrl->task)) {
975 dev_err(chan->ctrl->dev,
976 "failed to create svc_smc_hvc_thread\n");
977 kfree(p_data);
978 return -EINVAL;
979 }
980 kthread_bind(chan->ctrl->task, cpu);
981 wake_up_process(chan->ctrl->task);
982 }
983
984 pr_debug("%s: sent P-va=%p, P-com=%x, P-size=%u\n", __func__,
985 p_msg->payload, p_msg->command,
986 (unsigned int)p_msg->payload_length);
987
988 if (list_empty(&svc_data_mem)) {
989 if (p_msg->command == COMMAND_RECONFIG) {
990 struct stratix10_svc_command_config_type *ct =
991 (struct stratix10_svc_command_config_type *)
992 p_msg->payload;
993 p_data->flag = ct->flags;
994 }
995 } else {
996 list_for_each_entry(p_mem, &svc_data_mem, node)
997 if (p_mem->vaddr == p_msg->payload) {
998 p_data->paddr = p_mem->paddr;
999 p_data->size = p_msg->payload_length;
1000 break;
1001 }
1002 if (p_msg->payload_output) {
1003 list_for_each_entry(p_mem, &svc_data_mem, node)
1004 if (p_mem->vaddr == p_msg->payload_output) {
1005 p_data->paddr_output =
1006 p_mem->paddr;
1007 p_data->size_output =
1008 p_msg->payload_length_output;
1009 break;
1010 }
1011 }
1012 }
1013
1014 p_data->command = p_msg->command;
1015 p_data->arg[0] = p_msg->arg[0];
1016 p_data->arg[1] = p_msg->arg[1];
1017 p_data->arg[2] = p_msg->arg[2];
1018 p_data->size = p_msg->payload_length;
1019 p_data->chan = chan;
1020 pr_debug("%s: put to FIFO pa=0x%016x, cmd=%x, size=%u\n", __func__,
1021 (unsigned int)p_data->paddr, p_data->command,
1022 (unsigned int)p_data->size);
1023 ret = kfifo_in_spinlocked(&chan->ctrl->svc_fifo, p_data,
1024 sizeof(*p_data),
1025 &chan->ctrl->svc_fifo_lock);
1026
1027 kfree(p_data);
1028
1029 if (!ret)
1030 return -ENOBUFS;
1031
1032 return 0;
1033 }
1034 EXPORT_SYMBOL_GPL(stratix10_svc_send);
1035
1036 /**
1037 * stratix10_svc_done() - complete service request transactions
1038 * @chan: service channel assigned to the client
1039 *
1040 * This function should be called when client has finished its request
1041 * or there is an error in the request process. It allows the service layer
1042 * to stop the running thread to have maximize savings in kernel resources.
1043 */
1044 void stratix10_svc_done(struct stratix10_svc_chan *chan)
1045 {
1046 /* stop thread when thread is running AND only one active client */
1047 if (chan->ctrl->task && chan->ctrl->num_active_client <= 1) {
1048 pr_debug("svc_smc_hvc_shm_thread is stopped\n");
1049 kthread_stop(chan->ctrl->task);
1050 chan->ctrl->task = NULL;
1051 }
1052 }
1053 EXPORT_SYMBOL_GPL(stratix10_svc_done);
1054
1055 /**
1056 * stratix10_svc_allocate_memory() - allocate memory
1057 * @chan: service channel assigned to the client
1058 * @size: memory size requested by a specific service client
1059 *
1060 * Service layer allocates the requested number of bytes buffer from the
1061 * memory pool, service client uses this function to get allocated buffers.
1062 *
1063 * Return: address of allocated memory on success, or ERR_PTR() on error.
1064 */
1065 void *stratix10_svc_allocate_memory(struct stratix10_svc_chan *chan,
1066 size_t size)
1067 {
1068 struct stratix10_svc_data_mem *pmem;
1069 unsigned long va;
1070 phys_addr_t pa;
1071 struct gen_pool *genpool = chan->ctrl->genpool;
1072 size_t s = roundup(size, 1 << genpool->min_alloc_order);
1073
1074 pmem = devm_kzalloc(chan->ctrl->dev, sizeof(*pmem), GFP_KERNEL);
1075 if (!pmem)
1076 return ERR_PTR(-ENOMEM);
1077
1078 va = gen_pool_alloc(genpool, s);
1079 if (!va)
1080 return ERR_PTR(-ENOMEM);
1081
1082 memset((void *)va, 0, s);
1083 pa = gen_pool_virt_to_phys(genpool, va);
1084
1085 pmem->vaddr = (void *)va;
1086 pmem->paddr = pa;
1087 pmem->size = s;
1088 list_add_tail(&pmem->node, &svc_data_mem);
1089 pr_debug("%s: va=%p, pa=0x%016x\n", __func__,
1090 pmem->vaddr, (unsigned int)pmem->paddr);
1091
1092 return (void *)va;
1093 }
1094 EXPORT_SYMBOL_GPL(stratix10_svc_allocate_memory);
1095
1096 /**
1097 * stratix10_svc_free_memory() - free allocated memory
1098 * @chan: service channel assigned to the client
1099 * @kaddr: memory to be freed
1100 *
1101 * This function is used by service client to free allocated buffers.
1102 */
1103 void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kaddr)
1104 {
1105 struct stratix10_svc_data_mem *pmem;
1106
1107 list_for_each_entry(pmem, &svc_data_mem, node)
1108 if (pmem->vaddr == kaddr) {
1109 gen_pool_free(chan->ctrl->genpool,
1110 (unsigned long)kaddr, pmem->size);
1111 pmem->vaddr = NULL;
1112 list_del(&pmem->node);
1113 return;
1114 }
1115
1116 list_del(&svc_data_mem);
1117 }
1118 EXPORT_SYMBOL_GPL(stratix10_svc_free_memory);
1119
1120 static const struct of_device_id stratix10_svc_drv_match[] = {
1121 {.compatible = "intel,stratix10-svc"},
1122 {.compatible = "intel,agilex-svc"},
1123 {},
1124 };
1125
1126 static int stratix10_svc_drv_probe(struct platform_device *pdev)
1127 {
1128 struct device *dev = &pdev->dev;
1129 struct stratix10_svc_controller *controller;
1130 struct stratix10_svc_chan *chans;
1131 struct gen_pool *genpool;
1132 struct stratix10_svc_sh_memory *sh_memory;
1133 struct stratix10_svc *svc;
1134
1135 svc_invoke_fn *invoke_fn;
1136 size_t fifo_size;
1137 int ret;
1138
1139 /* get SMC or HVC function */
1140 invoke_fn = get_invoke_func(dev);
1141 if (IS_ERR(invoke_fn))
1142 return -EINVAL;
1143
1144 sh_memory = devm_kzalloc(dev, sizeof(*sh_memory), GFP_KERNEL);
1145 if (!sh_memory)
1146 return -ENOMEM;
1147
1148 sh_memory->invoke_fn = invoke_fn;
1149 ret = svc_get_sh_memory(pdev, sh_memory);
1150 if (ret)
1151 return ret;
1152
1153 genpool = svc_create_memory_pool(pdev, sh_memory);
1154 if (IS_ERR(genpool))
1155 return PTR_ERR(genpool);
1156
1157 /* allocate service controller and supporting channel */
1158 controller = devm_kzalloc(dev, sizeof(*controller), GFP_KERNEL);
1159 if (!controller) {
1160 ret = -ENOMEM;
1161 goto err_destroy_pool;
1162 }
1163
1164 chans = devm_kmalloc_array(dev, SVC_NUM_CHANNEL,
1165 sizeof(*chans), GFP_KERNEL | __GFP_ZERO);
1166 if (!chans) {
1167 ret = -ENOMEM;
1168 goto err_destroy_pool;
1169 }
1170
1171 controller->dev = dev;
1172 controller->num_chans = SVC_NUM_CHANNEL;
1173 controller->num_active_client = 0;
1174 controller->chans = chans;
1175 controller->genpool = genpool;
1176 controller->task = NULL;
1177 controller->invoke_fn = invoke_fn;
1178 init_completion(&controller->complete_status);
1179
1180 fifo_size = sizeof(struct stratix10_svc_data) * SVC_NUM_DATA_IN_FIFO;
1181 ret = kfifo_alloc(&controller->svc_fifo, fifo_size, GFP_KERNEL);
1182 if (ret) {
1183 dev_err(dev, "failed to allocate FIFO\n");
1184 goto err_destroy_pool;
1185 }
1186 spin_lock_init(&controller->svc_fifo_lock);
1187
1188 chans[0].scl = NULL;
1189 chans[0].ctrl = controller;
1190 chans[0].name = SVC_CLIENT_FPGA;
1191 spin_lock_init(&chans[0].lock);
1192
1193 chans[1].scl = NULL;
1194 chans[1].ctrl = controller;
1195 chans[1].name = SVC_CLIENT_RSU;
1196 spin_lock_init(&chans[1].lock);
1197
1198 chans[2].scl = NULL;
1199 chans[2].ctrl = controller;
1200 chans[2].name = SVC_CLIENT_FCS;
1201 spin_lock_init(&chans[2].lock);
1202
1203 list_add_tail(&controller->node, &svc_ctrl);
1204 platform_set_drvdata(pdev, controller);
1205
1206 /* add svc client device(s) */
1207 svc = devm_kzalloc(dev, sizeof(*svc), GFP_KERNEL);
1208 if (!svc) {
1209 ret = -ENOMEM;
1210 goto err_free_kfifo;
1211 }
1212
1213 svc->stratix10_svc_rsu = platform_device_alloc(STRATIX10_RSU, 0);
1214 if (!svc->stratix10_svc_rsu) {
1215 dev_err(dev, "failed to allocate %s device\n", STRATIX10_RSU);
1216 ret = -ENOMEM;
1217 goto err_free_kfifo;
1218 }
1219
1220 ret = platform_device_add(svc->stratix10_svc_rsu);
1221 if (ret) {
1222 platform_device_put(svc->stratix10_svc_rsu);
1223 goto err_free_kfifo;
1224 }
1225
1226 svc->intel_svc_fcs = platform_device_alloc(INTEL_FCS, 1);
1227 if (!svc->intel_svc_fcs) {
1228 dev_err(dev, "failed to allocate %s device\n", INTEL_FCS);
1229 ret = -ENOMEM;
1230 goto err_unregister_dev;
1231 }
1232
1233 ret = platform_device_add(svc->intel_svc_fcs);
1234 if (ret) {
1235 platform_device_put(svc->intel_svc_fcs);
1236 goto err_unregister_dev;
1237 }
1238
1239 dev_set_drvdata(dev, svc);
1240
1241 pr_info("Intel Service Layer Driver Initialized\n");
1242
1243 return 0;
1244
1245 err_unregister_dev:
1246 platform_device_unregister(svc->stratix10_svc_rsu);
1247 err_free_kfifo:
1248 kfifo_free(&controller->svc_fifo);
1249 err_destroy_pool:
1250 gen_pool_destroy(genpool);
1251 return ret;
1252 }
1253
1254 static void stratix10_svc_drv_remove(struct platform_device *pdev)
1255 {
1256 struct stratix10_svc *svc = dev_get_drvdata(&pdev->dev);
1257 struct stratix10_svc_controller *ctrl = platform_get_drvdata(pdev);
1258
1259 platform_device_unregister(svc->intel_svc_fcs);
1260 platform_device_unregister(svc->stratix10_svc_rsu);
1261
1262 kfifo_free(&ctrl->svc_fifo);
1263 if (ctrl->task) {
1264 kthread_stop(ctrl->task);
1265 ctrl->task = NULL;
1266 }
1267 if (ctrl->genpool)
1268 gen_pool_destroy(ctrl->genpool);
1269 list_del(&ctrl->node);
1270 }
1271
1272 static struct platform_driver stratix10_svc_driver = {
1273 .probe = stratix10_svc_drv_probe,
1274 .remove_new = stratix10_svc_drv_remove,
1275 .driver = {
1276 .name = "stratix10-svc",
1277 .of_match_table = stratix10_svc_drv_match,
1278 },
1279 };
1280
1281 static int __init stratix10_svc_init(void)
1282 {
1283 struct device_node *fw_np;
1284 struct device_node *np;
1285 int ret;
1286
1287 fw_np = of_find_node_by_name(NULL, "firmware");
1288 if (!fw_np)
1289 return -ENODEV;
1290
1291 np = of_find_matching_node(fw_np, stratix10_svc_drv_match);
1292 if (!np)
1293 return -ENODEV;
1294
1295 of_node_put(np);
1296 ret = of_platform_populate(fw_np, stratix10_svc_drv_match, NULL, NULL);
1297 if (ret)
1298 return ret;
1299
1300 return platform_driver_register(&stratix10_svc_driver);
1301 }
1302
1303 static void __exit stratix10_svc_exit(void)
1304 {
1305 return platform_driver_unregister(&stratix10_svc_driver);
1306 }
1307
1308 subsys_initcall(stratix10_svc_init);
1309 module_exit(stratix10_svc_exit);
1310
1311 MODULE_LICENSE("GPL v2");
1312 MODULE_DESCRIPTION("Intel Stratix10 Service Layer Driver");
1313 MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
1314 MODULE_ALIAS("platform:stratix10-svc");
Kernel DRM miscellaneous fixes and cross-tree changes