1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Huawei HiNIC PCI Express Linux driver
4 * Copyright(c) 2017 Huawei Technologies Co., Ltd
5 */
6
7#include <linux/kernel.h>
8#include <linux/types.h>
9#include <linux/errno.h>
10#include <linux/pci.h>
11#include <linux/device.h>
12#include <linux/workqueue.h>
13#include <linux/interrupt.h>
14#include <linux/slab.h>
15#include <linux/dma-mapping.h>
16#include <linux/log2.h>
17#include <asm/byteorder.h>
18#include <asm/barrier.h>
19
20#include "hinic_hw_dev.h"
21#include "hinic_hw_csr.h"
22#include "hinic_hw_if.h"
23#include "hinic_hw_eqs.h"
24
25#define HINIC_EQS_WQ_NAME "hinic_eqs"
26
27#define GET_EQ_NUM_PAGES(eq, pg_size) \
28 (ALIGN((eq)->q_len * (eq)->elem_size, pg_size) / (pg_size))
29
30#define GET_EQ_NUM_ELEMS_IN_PG(eq, pg_size) ((pg_size) / (eq)->elem_size)
31
32#define EQ_CONS_IDX_REG_ADDR(eq) (((eq)->type == HINIC_AEQ) ? \
33 HINIC_CSR_AEQ_CONS_IDX_ADDR((eq)->q_id) : \
34 HINIC_CSR_CEQ_CONS_IDX_ADDR((eq)->q_id))
35
36#define EQ_PROD_IDX_REG_ADDR(eq) (((eq)->type == HINIC_AEQ) ? \
37 HINIC_CSR_AEQ_PROD_IDX_ADDR((eq)->q_id) : \
38 HINIC_CSR_CEQ_PROD_IDX_ADDR((eq)->q_id))
39
40#define EQ_HI_PHYS_ADDR_REG(eq, pg_num) (((eq)->type == HINIC_AEQ) ? \
41 HINIC_CSR_AEQ_HI_PHYS_ADDR_REG((eq)->q_id, pg_num) : \
42 HINIC_CSR_CEQ_HI_PHYS_ADDR_REG((eq)->q_id, pg_num))
43
44#define EQ_LO_PHYS_ADDR_REG(eq, pg_num) (((eq)->type == HINIC_AEQ) ? \
45 HINIC_CSR_AEQ_LO_PHYS_ADDR_REG((eq)->q_id, pg_num) : \
46 HINIC_CSR_CEQ_LO_PHYS_ADDR_REG((eq)->q_id, pg_num))
47
48#define GET_EQ_ELEMENT(eq, idx) \
49 ((eq)->virt_addr[(idx) / (eq)->num_elem_in_pg] + \
50 (((idx) & ((eq)->num_elem_in_pg - 1)) * (eq)->elem_size))
51
52#define GET_AEQ_ELEM(eq, idx) ((struct hinic_aeq_elem *) \
53 GET_EQ_ELEMENT(eq, idx))
54
55#define GET_CEQ_ELEM(eq, idx) ((u32 *) \
56 GET_EQ_ELEMENT(eq, idx))
57
58#define GET_CURR_AEQ_ELEM(eq) GET_AEQ_ELEM(eq, (eq)->cons_idx)
59
60#define GET_CURR_CEQ_ELEM(eq) GET_CEQ_ELEM(eq, (eq)->cons_idx)
61
62#define PAGE_IN_4K(page_size) ((page_size) >> 12)
63#define EQ_SET_HW_PAGE_SIZE_VAL(eq) (ilog2(PAGE_IN_4K((eq)->page_size)))
64
65#define ELEMENT_SIZE_IN_32B(eq) (((eq)->elem_size) >> 5)
66#define EQ_SET_HW_ELEM_SIZE_VAL(eq) (ilog2(ELEMENT_SIZE_IN_32B(eq)))
67
68#define EQ_MAX_PAGES 8
69
70#define CEQE_TYPE_SHIFT 23
71#define CEQE_TYPE_MASK 0x7
72
73#define CEQE_TYPE(ceqe) (((ceqe) >> CEQE_TYPE_SHIFT) & \
74 CEQE_TYPE_MASK)
75
76#define CEQE_DATA_MASK 0x3FFFFFF
77#define CEQE_DATA(ceqe) ((ceqe) & CEQE_DATA_MASK)
78
79#define aeq_to_aeqs(eq) \
80 container_of((eq) - (eq)->q_id, struct hinic_aeqs, aeq[0])
81
82#define ceq_to_ceqs(eq) \
83 container_of((eq) - (eq)->q_id, struct hinic_ceqs, ceq[0])
84
85#define work_to_aeq_work(work) \
86 container_of(work, struct hinic_eq_work, work)
87
88#define DMA_ATTR_AEQ_DEFAULT 0
89#define DMA_ATTR_CEQ_DEFAULT 0
90
91/* No coalescence */
92#define THRESH_CEQ_DEFAULT 0
93
94enum eq_int_mode {
95 EQ_INT_MODE_ARMED,
96 EQ_INT_MODE_ALWAYS
97};
98
99enum eq_arm_state {
100 EQ_NOT_ARMED,
101 EQ_ARMED
102};
103
104/**
105 * hinic_aeq_register_hw_cb - register AEQ callback for specific event
106 * @aeqs: pointer to Async eqs of the chip
107 * @event: aeq event to register callback for it
108 * @handle: private data will be used by the callback
109 * @hwe_handler: callback function
110 **/
111void hinic_aeq_register_hw_cb(struct hinic_aeqs *aeqs,
112 enum hinic_aeq_type event, void *handle,
113 void (*hwe_handler)(void *handle, void *data,
114 u8 size))
115{
116 struct hinic_hw_event_cb *hwe_cb = &aeqs->hwe_cb[event];
117
118 hwe_cb->hwe_handler = hwe_handler;
119 hwe_cb->handle = handle;
120 hwe_cb->hwe_state = HINIC_EQE_ENABLED;
121}
122
123/**
124 * hinic_aeq_unregister_hw_cb - unregister the AEQ callback for specific event
125 * @aeqs: pointer to Async eqs of the chip
126 * @event: aeq event to unregister callback for it
127 **/
128void hinic_aeq_unregister_hw_cb(struct hinic_aeqs *aeqs,
129 enum hinic_aeq_type event)
130{
131 struct hinic_hw_event_cb *hwe_cb = &aeqs->hwe_cb[event];
132
133 hwe_cb->hwe_state &= ~HINIC_EQE_ENABLED;
134
135 while (hwe_cb->hwe_state & HINIC_EQE_RUNNING)
136 schedule();
137
138 hwe_cb->hwe_handler = NULL;
139}
140
141/**
142 * hinic_ceq_register_cb - register CEQ callback for specific event
143 * @ceqs: pointer to Completion eqs part of the chip
144 * @event: ceq event to register callback for it
145 * @handle: private data will be used by the callback
146 * @handler: callback function
147 **/
148void hinic_ceq_register_cb(struct hinic_ceqs *ceqs,
149 enum hinic_ceq_type event, void *handle,
150 void (*handler)(void *handle, u32 ceqe_data))
151{
152 struct hinic_ceq_cb *ceq_cb = &ceqs->ceq_cb[event];
153
154 ceq_cb->handler = handler;
155 ceq_cb->handle = handle;
156 ceq_cb->ceqe_state = HINIC_EQE_ENABLED;
157}
158
159/**
160 * hinic_ceq_unregister_cb - unregister the CEQ callback for specific event
161 * @ceqs: pointer to Completion eqs part of the chip
162 * @event: ceq event to unregister callback for it
163 **/
164void hinic_ceq_unregister_cb(struct hinic_ceqs *ceqs,
165 enum hinic_ceq_type event)
166{
167 struct hinic_ceq_cb *ceq_cb = &ceqs->ceq_cb[event];
168
169 ceq_cb->ceqe_state &= ~HINIC_EQE_ENABLED;
170
171 while (ceq_cb->ceqe_state & HINIC_EQE_RUNNING)
172 schedule();
173
174 ceq_cb->handler = NULL;
175}
176
177static u8 eq_cons_idx_checksum_set(u32 val)
178{
179 u8 checksum = 0;
180 int idx;
181
182 for (idx = 0; idx < 32; idx += 4)
183 checksum ^= ((val >> idx) & 0xF);
184
185 return (checksum & 0xF);
186}
187
188/**
189 * eq_update_ci - update the HW cons idx of event queue
190 * @eq: the event queue to update the cons idx for
191 * @arm_state: the arm bit value of eq's interrupt
192 **/
193static void eq_update_ci(struct hinic_eq *eq, u32 arm_state)
194{
195 u32 val, addr = EQ_CONS_IDX_REG_ADDR(eq);
196
197 /* Read Modify Write */
198 val = hinic_hwif_read_reg(hwif: eq->hwif, reg: addr);
199
200 val = HINIC_EQ_CI_CLEAR(val, IDX) &
201 HINIC_EQ_CI_CLEAR(val, WRAPPED) &
202 HINIC_EQ_CI_CLEAR(val, INT_ARMED) &
203 HINIC_EQ_CI_CLEAR(val, XOR_CHKSUM);
204
205 val |= HINIC_EQ_CI_SET(eq->cons_idx, IDX) |
206 HINIC_EQ_CI_SET(eq->wrapped, WRAPPED) |
207 HINIC_EQ_CI_SET(arm_state, INT_ARMED);
208
209 val |= HINIC_EQ_CI_SET(eq_cons_idx_checksum_set(val), XOR_CHKSUM);
210
211 hinic_hwif_write_reg(hwif: eq->hwif, reg: addr, val);
212}
213
214/**
215 * aeq_irq_handler - handler for the AEQ event
216 * @eq: the Async Event Queue that received the event
217 **/
218static void aeq_irq_handler(struct hinic_eq *eq)
219{
220 struct hinic_aeqs *aeqs = aeq_to_aeqs(eq);
221 struct hinic_hwif *hwif = aeqs->hwif;
222 struct pci_dev *pdev = hwif->pdev;
223 struct hinic_aeq_elem *aeqe_curr;
224 struct hinic_hw_event_cb *hwe_cb;
225 enum hinic_aeq_type event;
226 unsigned long eqe_state;
227 u32 aeqe_desc;
228 int i, size;
229
230 for (i = 0; i < eq->q_len; i++) {
231 aeqe_curr = GET_CURR_AEQ_ELEM(eq);
232
233 /* Data in HW is in Big endian Format */
234 aeqe_desc = be32_to_cpu(aeqe_curr->desc);
235
236 /* HW toggles the wrapped bit, when it adds eq element */
237 if (HINIC_EQ_ELEM_DESC_GET(aeqe_desc, WRAPPED) == eq->wrapped)
238 break;
239
240 dma_rmb();
241
242 event = HINIC_EQ_ELEM_DESC_GET(aeqe_desc, TYPE);
243 if (event >= HINIC_MAX_AEQ_EVENTS) {
244 dev_err(&pdev->dev, "Unknown AEQ Event %d\n", event);
245 return;
246 }
247
248 if (!HINIC_EQ_ELEM_DESC_GET(aeqe_desc, SRC)) {
249 hwe_cb = &aeqs->hwe_cb[event];
250
251 size = HINIC_EQ_ELEM_DESC_GET(aeqe_desc, SIZE);
252
253 eqe_state = cmpxchg(&hwe_cb->hwe_state,
254 HINIC_EQE_ENABLED,
255 HINIC_EQE_ENABLED |
256 HINIC_EQE_RUNNING);
257 if (eqe_state == HINIC_EQE_ENABLED &&
258 hwe_cb->hwe_handler)
259 hwe_cb->hwe_handler(hwe_cb->handle,
260 aeqe_curr->data, size);
261 else
262 dev_err(&pdev->dev, "Unhandled AEQ Event %d\n",
263 event);
264
265 hwe_cb->hwe_state &= ~HINIC_EQE_RUNNING;
266 }
267
268 eq->cons_idx++;
269
270 if (eq->cons_idx == eq->q_len) {
271 eq->cons_idx = 0;
272 eq->wrapped = !eq->wrapped;
273 }
274 }
275}
276
277/**
278 * ceq_event_handler - handler for the ceq events
279 * @ceqs: ceqs part of the chip
280 * @ceqe: ceq element that describes the event
281 **/
282static void ceq_event_handler(struct hinic_ceqs *ceqs, u32 ceqe)
283{
284 struct hinic_hwif *hwif = ceqs->hwif;
285 struct pci_dev *pdev = hwif->pdev;
286 struct hinic_ceq_cb *ceq_cb;
287 enum hinic_ceq_type event;
288 unsigned long eqe_state;
289
290 event = CEQE_TYPE(ceqe);
291 if (event >= HINIC_MAX_CEQ_EVENTS) {
292 dev_err(&pdev->dev, "Unknown CEQ event, event = %d\n", event);
293 return;
294 }
295
296 ceq_cb = &ceqs->ceq_cb[event];
297
298 eqe_state = cmpxchg(&ceq_cb->ceqe_state,
299 HINIC_EQE_ENABLED,
300 HINIC_EQE_ENABLED | HINIC_EQE_RUNNING);
301
302 if (eqe_state == HINIC_EQE_ENABLED && ceq_cb->handler)
303 ceq_cb->handler(ceq_cb->handle, CEQE_DATA(ceqe));
304 else
305 dev_err(&pdev->dev, "Unhandled CEQ Event %d\n", event);
306
307 ceq_cb->ceqe_state &= ~HINIC_EQE_RUNNING;
308}
309
310/**
311 * ceq_irq_handler - handler for the CEQ event
312 * @eq: the Completion Event Queue that received the event
313 **/
314static void ceq_irq_handler(struct hinic_eq *eq)
315{
316 struct hinic_ceqs *ceqs = ceq_to_ceqs(eq);
317 u32 ceqe;
318 int i;
319
320 for (i = 0; i < eq->q_len; i++) {
321 ceqe = *(GET_CURR_CEQ_ELEM(eq));
322
323 /* Data in HW is in Big endian Format */
324 ceqe = be32_to_cpu(ceqe);
325
326 /* HW toggles the wrapped bit, when it adds eq element event */
327 if (HINIC_EQ_ELEM_DESC_GET(ceqe, WRAPPED) == eq->wrapped)
328 break;
329
330 ceq_event_handler(ceqs, ceqe);
331
332 eq->cons_idx++;
333
334 if (eq->cons_idx == eq->q_len) {
335 eq->cons_idx = 0;
336 eq->wrapped = !eq->wrapped;
337 }
338 }
339}
340
341/**
342 * eq_irq_handler - handler for the EQ event
343 * @data: the Event Queue that received the event
344 **/
345static void eq_irq_handler(void *data)
346{
347 struct hinic_eq *eq = data;
348
349 if (eq->type == HINIC_AEQ)
350 aeq_irq_handler(eq);
351 else if (eq->type == HINIC_CEQ)
352 ceq_irq_handler(eq);
353
354 eq_update_ci(eq, arm_state: EQ_ARMED);
355}
356
357/**
358 * eq_irq_work - the work of the EQ that received the event
359 * @work: the work struct that is associated with the EQ
360 **/
361static void eq_irq_work(struct work_struct *work)
362{
363 struct hinic_eq_work *aeq_work = work_to_aeq_work(work);
364 struct hinic_eq *aeq;
365
366 aeq = aeq_work->data;
367 eq_irq_handler(data: aeq);
368}
369
370/**
371 * ceq_tasklet - the tasklet of the EQ that received the event
372 * @t: the tasklet struct pointer
373 **/
374static void ceq_tasklet(struct tasklet_struct *t)
375{
376 struct hinic_eq *ceq = from_tasklet(ceq, t, ceq_tasklet);
377
378 eq_irq_handler(data: ceq);
379}
380
381/**
382 * aeq_interrupt - aeq interrupt handler
383 * @irq: irq number
384 * @data: the Async Event Queue that collected the event
385 **/
386static irqreturn_t aeq_interrupt(int irq, void *data)
387{
388 struct hinic_eq_work *aeq_work;
389 struct hinic_eq *aeq = data;
390 struct hinic_aeqs *aeqs;
391
392 /* clear resend timer cnt register */
393 hinic_msix_attr_cnt_clear(hwif: aeq->hwif, msix_index: aeq->msix_entry.entry);
394
395 aeq_work = &aeq->aeq_work;
396 aeq_work->data = aeq;
397
398 aeqs = aeq_to_aeqs(aeq);
399 queue_work(wq: aeqs->workq, work: &aeq_work->work);
400
401 return IRQ_HANDLED;
402}
403
404/**
405 * ceq_interrupt - ceq interrupt handler
406 * @irq: irq number
407 * @data: the Completion Event Queue that collected the event
408 **/
409static irqreturn_t ceq_interrupt(int irq, void *data)
410{
411 struct hinic_eq *ceq = data;
412
413 /* clear resend timer cnt register */
414 hinic_msix_attr_cnt_clear(hwif: ceq->hwif, msix_index: ceq->msix_entry.entry);
415
416 tasklet_schedule(t: &ceq->ceq_tasklet);
417
418 return IRQ_HANDLED;
419}
420
421static u32 get_ctrl0_val(struct hinic_eq *eq, u32 addr)
422{
423 struct msix_entry *msix_entry = &eq->msix_entry;
424 enum hinic_eq_type type = eq->type;
425 u32 val, ctrl0;
426
427 if (type == HINIC_AEQ) {
428 /* RMW Ctrl0 */
429 addr = HINIC_CSR_AEQ_CTRL_0_ADDR(eq->q_id);
430
431 val = hinic_hwif_read_reg(hwif: eq->hwif, reg: addr);
432
433 val = HINIC_AEQ_CTRL_0_CLEAR(val, INT_IDX) &
434 HINIC_AEQ_CTRL_0_CLEAR(val, DMA_ATTR) &
435 HINIC_AEQ_CTRL_0_CLEAR(val, PCI_INTF_IDX) &
436 HINIC_AEQ_CTRL_0_CLEAR(val, INT_MODE);
437
438 ctrl0 = HINIC_AEQ_CTRL_0_SET(msix_entry->entry, INT_IDX) |
439 HINIC_AEQ_CTRL_0_SET(DMA_ATTR_AEQ_DEFAULT, DMA_ATTR) |
440 HINIC_AEQ_CTRL_0_SET(HINIC_HWIF_PCI_INTF(eq->hwif),
441 PCI_INTF_IDX) |
442 HINIC_AEQ_CTRL_0_SET(EQ_INT_MODE_ARMED, INT_MODE);
443
444 val |= ctrl0;
445 } else {
446 /* RMW Ctrl0 */
447 addr = HINIC_CSR_CEQ_CTRL_0_ADDR(eq->q_id);
448
449 val = hinic_hwif_read_reg(hwif: eq->hwif, reg: addr);
450
451 val = HINIC_CEQ_CTRL_0_CLEAR(val, INTR_IDX) &
452 HINIC_CEQ_CTRL_0_CLEAR(val, DMA_ATTR) &
453 HINIC_CEQ_CTRL_0_CLEAR(val, KICK_THRESH) &
454 HINIC_CEQ_CTRL_0_CLEAR(val, PCI_INTF_IDX) &
455 HINIC_CEQ_CTRL_0_CLEAR(val, INTR_MODE);
456
457 ctrl0 = HINIC_CEQ_CTRL_0_SET(msix_entry->entry, INTR_IDX) |
458 HINIC_CEQ_CTRL_0_SET(DMA_ATTR_CEQ_DEFAULT, DMA_ATTR) |
459 HINIC_CEQ_CTRL_0_SET(THRESH_CEQ_DEFAULT, KICK_THRESH) |
460 HINIC_CEQ_CTRL_0_SET(HINIC_HWIF_PCI_INTF(eq->hwif),
461 PCI_INTF_IDX) |
462 HINIC_CEQ_CTRL_0_SET(EQ_INT_MODE_ARMED, INTR_MODE);
463
464 val |= ctrl0;
465 }
466 return val;
467}
468
469static void set_ctrl0(struct hinic_eq *eq)
470{
471 u32 val, addr;
472
473 if (eq->type == HINIC_AEQ)
474 addr = HINIC_CSR_AEQ_CTRL_0_ADDR(eq->q_id);
475 else
476 addr = HINIC_CSR_CEQ_CTRL_0_ADDR(eq->q_id);
477
478 val = get_ctrl0_val(eq, addr);
479
480 hinic_hwif_write_reg(hwif: eq->hwif, reg: addr, val);
481}
482
483static u32 get_ctrl1_val(struct hinic_eq *eq, u32 addr)
484{
485 u32 page_size_val, elem_size, val, ctrl1;
486 enum hinic_eq_type type = eq->type;
487
488 if (type == HINIC_AEQ) {
489 /* RMW Ctrl1 */
490 addr = HINIC_CSR_AEQ_CTRL_1_ADDR(eq->q_id);
491
492 page_size_val = EQ_SET_HW_PAGE_SIZE_VAL(eq);
493 elem_size = EQ_SET_HW_ELEM_SIZE_VAL(eq);
494
495 val = hinic_hwif_read_reg(hwif: eq->hwif, reg: addr);
496
497 val = HINIC_AEQ_CTRL_1_CLEAR(val, LEN) &
498 HINIC_AEQ_CTRL_1_CLEAR(val, ELEM_SIZE) &
499 HINIC_AEQ_CTRL_1_CLEAR(val, PAGE_SIZE);
500
501 ctrl1 = HINIC_AEQ_CTRL_1_SET(eq->q_len, LEN) |
502 HINIC_AEQ_CTRL_1_SET(elem_size, ELEM_SIZE) |
503 HINIC_AEQ_CTRL_1_SET(page_size_val, PAGE_SIZE);
504
505 val |= ctrl1;
506 } else {
507 /* RMW Ctrl1 */
508 addr = HINIC_CSR_CEQ_CTRL_1_ADDR(eq->q_id);
509
510 page_size_val = EQ_SET_HW_PAGE_SIZE_VAL(eq);
511
512 val = hinic_hwif_read_reg(hwif: eq->hwif, reg: addr);
513
514 val = HINIC_CEQ_CTRL_1_CLEAR(val, LEN) &
515 HINIC_CEQ_CTRL_1_CLEAR(val, PAGE_SIZE);
516
517 ctrl1 = HINIC_CEQ_CTRL_1_SET(eq->q_len, LEN) |
518 HINIC_CEQ_CTRL_1_SET(page_size_val, PAGE_SIZE);
519
520 val |= ctrl1;
521 }
522 return val;
523}
524
525static void set_ctrl1(struct hinic_eq *eq)
526{
527 u32 addr, val;
528
529 if (eq->type == HINIC_AEQ)
530 addr = HINIC_CSR_AEQ_CTRL_1_ADDR(eq->q_id);
531 else
532 addr = HINIC_CSR_CEQ_CTRL_1_ADDR(eq->q_id);
533
534 val = get_ctrl1_val(eq, addr);
535
536 hinic_hwif_write_reg(hwif: eq->hwif, reg: addr, val);
537}
538
539static int set_ceq_ctrl_reg(struct hinic_eq *eq)
540{
541 struct hinic_ceq_ctrl_reg ceq_ctrl = {0};
542 struct hinic_hwdev *hwdev = eq->hwdev;
543 u16 out_size = sizeof(ceq_ctrl);
544 u16 in_size = sizeof(ceq_ctrl);
545 struct hinic_pfhwdev *pfhwdev;
546 u32 addr;
547 int err;
548
549 pfhwdev = container_of(hwdev, struct hinic_pfhwdev, hwdev);
550
551 addr = HINIC_CSR_CEQ_CTRL_0_ADDR(eq->q_id);
552 ceq_ctrl.ctrl0 = get_ctrl0_val(eq, addr);
553 addr = HINIC_CSR_CEQ_CTRL_1_ADDR(eq->q_id);
554 ceq_ctrl.ctrl1 = get_ctrl1_val(eq, addr);
555
556 ceq_ctrl.func_id = HINIC_HWIF_FUNC_IDX(hwdev->hwif);
557 ceq_ctrl.q_id = eq->q_id;
558
559 err = hinic_msg_to_mgmt(pf_to_mgmt: &pfhwdev->pf_to_mgmt, mod: HINIC_MOD_COMM,
560 cmd: HINIC_COMM_CMD_CEQ_CTRL_REG_WR_BY_UP,
561 buf_in: &ceq_ctrl, in_size,
562 buf_out: &ceq_ctrl, out_size: &out_size, sync: HINIC_MGMT_MSG_SYNC);
563 if (err || !out_size || ceq_ctrl.status) {
564 dev_err(&hwdev->hwif->pdev->dev,
565 "Failed to set ceq %d ctrl reg, err: %d status: 0x%x, out_size: 0x%x\n",
566 eq->q_id, err, ceq_ctrl.status, out_size);
567 return -EFAULT;
568 }
569
570 return 0;
571}
572
573/**
574 * set_eq_ctrls - setting eq's ctrl registers
575 * @eq: the Event Queue for setting
576 **/
577static int set_eq_ctrls(struct hinic_eq *eq)
578{
579 if (HINIC_IS_VF(eq->hwif) && eq->type == HINIC_CEQ)
580 return set_ceq_ctrl_reg(eq);
581
582 set_ctrl0(eq);
583 set_ctrl1(eq);
584 return 0;
585}
586
587/**
588 * aeq_elements_init - initialize all the elements in the aeq
589 * @eq: the Async Event Queue
590 * @init_val: value to initialize the elements with it
591 **/
592static void aeq_elements_init(struct hinic_eq *eq, u32 init_val)
593{
594 struct hinic_aeq_elem *aeqe;
595 int i;
596
597 for (i = 0; i < eq->q_len; i++) {
598 aeqe = GET_AEQ_ELEM(eq, i);
599 aeqe->desc = cpu_to_be32(init_val);
600 }
601
602 wmb(); /* Write the initilzation values */
603}
604
605/**
606 * ceq_elements_init - Initialize all the elements in the ceq
607 * @eq: the event queue
608 * @init_val: value to init with it the elements
609 **/
610static void ceq_elements_init(struct hinic_eq *eq, u32 init_val)
611{
612 u32 *ceqe;
613 int i;
614
615 for (i = 0; i < eq->q_len; i++) {
616 ceqe = GET_CEQ_ELEM(eq, i);
617 *(ceqe) = cpu_to_be32(init_val);
618 }
619
620 wmb(); /* Write the initilzation values */
621}
622
623/**
624 * alloc_eq_pages - allocate the pages for the queue
625 * @eq: the event queue
626 *
627 * Return 0 - Success, Negative - Failure
628 **/
629static int alloc_eq_pages(struct hinic_eq *eq)
630{
631 struct hinic_hwif *hwif = eq->hwif;
632 struct pci_dev *pdev = hwif->pdev;
633 u32 init_val, addr, val;
634 int err, pg;
635
636 eq->dma_addr = devm_kcalloc(dev: &pdev->dev, n: eq->num_pages,
637 size: sizeof(*eq->dma_addr), GFP_KERNEL);
638 if (!eq->dma_addr)
639 return -ENOMEM;
640
641 eq->virt_addr = devm_kcalloc(dev: &pdev->dev, n: eq->num_pages,
642 size: sizeof(*eq->virt_addr), GFP_KERNEL);
643 if (!eq->virt_addr) {
644 err = -ENOMEM;
645 goto err_virt_addr_alloc;
646 }
647
648 for (pg = 0; pg < eq->num_pages; pg++) {
649 eq->virt_addr[pg] = dma_alloc_coherent(dev: &pdev->dev,
650 size: eq->page_size,
651 dma_handle: &eq->dma_addr[pg],
652 GFP_KERNEL);
653 if (!eq->virt_addr[pg]) {
654 err = -ENOMEM;
655 goto err_dma_alloc;
656 }
657
658 addr = EQ_HI_PHYS_ADDR_REG(eq, pg);
659 val = upper_32_bits(eq->dma_addr[pg]);
660
661 hinic_hwif_write_reg(hwif, reg: addr, val);
662
663 addr = EQ_LO_PHYS_ADDR_REG(eq, pg);
664 val = lower_32_bits(eq->dma_addr[pg]);
665
666 hinic_hwif_write_reg(hwif, reg: addr, val);
667 }
668
669 init_val = HINIC_EQ_ELEM_DESC_SET(eq->wrapped, WRAPPED);
670
671 if (eq->type == HINIC_AEQ)
672 aeq_elements_init(eq, init_val);
673 else if (eq->type == HINIC_CEQ)
674 ceq_elements_init(eq, init_val);
675
676 return 0;
677
678err_dma_alloc:
679 while (--pg >= 0)
680 dma_free_coherent(dev: &pdev->dev, size: eq->page_size,
681 cpu_addr: eq->virt_addr[pg],
682 dma_handle: eq->dma_addr[pg]);
683
684 devm_kfree(dev: &pdev->dev, p: eq->virt_addr);
685
686err_virt_addr_alloc:
687 devm_kfree(dev: &pdev->dev, p: eq->dma_addr);
688 return err;
689}
690
691/**
692 * free_eq_pages - free the pages of the queue
693 * @eq: the Event Queue
694 **/
695static void free_eq_pages(struct hinic_eq *eq)
696{
697 struct hinic_hwif *hwif = eq->hwif;
698 struct pci_dev *pdev = hwif->pdev;
699 int pg;
700
701 for (pg = 0; pg < eq->num_pages; pg++)
702 dma_free_coherent(dev: &pdev->dev, size: eq->page_size,
703 cpu_addr: eq->virt_addr[pg],
704 dma_handle: eq->dma_addr[pg]);
705
706 devm_kfree(dev: &pdev->dev, p: eq->virt_addr);
707 devm_kfree(dev: &pdev->dev, p: eq->dma_addr);
708}
709
710/**
711 * init_eq - initialize Event Queue
712 * @eq: the event queue
713 * @hwif: the HW interface of a PCI function device
714 * @type: the type of the event queue, aeq or ceq
715 * @q_id: Queue id number
716 * @q_len: the number of EQ elements
717 * @page_size: the page size of the pages in the event queue
718 * @entry: msix entry associated with the event queue
719 *
720 * Return 0 - Success, Negative - Failure
721 **/
722static int init_eq(struct hinic_eq *eq, struct hinic_hwif *hwif,
723 enum hinic_eq_type type, int q_id, u32 q_len, u32 page_size,
724 struct msix_entry entry)
725{
726 struct pci_dev *pdev = hwif->pdev;
727 int err;
728
729 eq->hwif = hwif;
730 eq->type = type;
731 eq->q_id = q_id;
732 eq->q_len = q_len;
733 eq->page_size = page_size;
734
735 /* Clear PI and CI, also clear the ARM bit */
736 hinic_hwif_write_reg(hwif: eq->hwif, EQ_CONS_IDX_REG_ADDR(eq), val: 0);
737 hinic_hwif_write_reg(hwif: eq->hwif, EQ_PROD_IDX_REG_ADDR(eq), val: 0);
738
739 eq->cons_idx = 0;
740 eq->wrapped = 0;
741
742 if (type == HINIC_AEQ) {
743 eq->elem_size = HINIC_AEQE_SIZE;
744 } else if (type == HINIC_CEQ) {
745 eq->elem_size = HINIC_CEQE_SIZE;
746 } else {
747 dev_err(&pdev->dev, "Invalid EQ type\n");
748 return -EINVAL;
749 }
750
751 eq->num_pages = GET_EQ_NUM_PAGES(eq, page_size);
752 eq->num_elem_in_pg = GET_EQ_NUM_ELEMS_IN_PG(eq, page_size);
753
754 eq->msix_entry = entry;
755
756 if (eq->num_elem_in_pg & (eq->num_elem_in_pg - 1)) {
757 dev_err(&pdev->dev, "num elements in eq page != power of 2\n");
758 return -EINVAL;
759 }
760
761 if (eq->num_pages > EQ_MAX_PAGES) {
762 dev_err(&pdev->dev, "too many pages for eq\n");
763 return -EINVAL;
764 }
765
766 err = set_eq_ctrls(eq);
767 if (err) {
768 dev_err(&pdev->dev, "Failed to set eq ctrls\n");
769 return err;
770 }
771
772 eq_update_ci(eq, arm_state: EQ_ARMED);
773
774 err = alloc_eq_pages(eq);
775 if (err) {
776 dev_err(&pdev->dev, "Failed to allocate pages for eq\n");
777 return err;
778 }
779
780 if (type == HINIC_AEQ) {
781 struct hinic_eq_work *aeq_work = &eq->aeq_work;
782
783 INIT_WORK(&aeq_work->work, eq_irq_work);
784 } else if (type == HINIC_CEQ) {
785 tasklet_setup(t: &eq->ceq_tasklet, callback: ceq_tasklet);
786 }
787
788 /* set the attributes of the msix entry */
789 hinic_msix_attr_set(hwif: eq->hwif, msix_index: eq->msix_entry.entry,
790 HINIC_EQ_MSIX_PENDING_LIMIT_DEFAULT,
791 HINIC_EQ_MSIX_COALESC_TIMER_DEFAULT,
792 HINIC_EQ_MSIX_LLI_TIMER_DEFAULT,
793 HINIC_EQ_MSIX_LLI_CREDIT_LIMIT_DEFAULT,
794 HINIC_EQ_MSIX_RESEND_TIMER_DEFAULT);
795
796 if (type == HINIC_AEQ) {
797 snprintf(buf: eq->irq_name, size: sizeof(eq->irq_name), fmt: "hinic_aeq%d@pci:%s", eq->q_id,
798 pci_name(pdev));
799 err = request_irq(irq: entry.vector, handler: aeq_interrupt, flags: 0, name: eq->irq_name, dev: eq);
800 } else if (type == HINIC_CEQ) {
801 snprintf(buf: eq->irq_name, size: sizeof(eq->irq_name), fmt: "hinic_ceq%d@pci:%s", eq->q_id,
802 pci_name(pdev));
803 err = request_irq(irq: entry.vector, handler: ceq_interrupt, flags: 0, name: eq->irq_name, dev: eq);
804 }
805
806 if (err) {
807 dev_err(&pdev->dev, "Failed to request irq for the EQ\n");
808 goto err_req_irq;
809 }
810
811 return 0;
812
813err_req_irq:
814 free_eq_pages(eq);
815 return err;
816}
817
818/**
819 * remove_eq - remove Event Queue
820 * @eq: the event queue
821 **/
822static void remove_eq(struct hinic_eq *eq)
823{
824 hinic_set_msix_state(hwif: eq->hwif, msix_idx: eq->msix_entry.entry,
825 flag: HINIC_MSIX_DISABLE);
826 free_irq(eq->msix_entry.vector, eq);
827
828 if (eq->type == HINIC_AEQ) {
829 struct hinic_eq_work *aeq_work = &eq->aeq_work;
830
831 cancel_work_sync(work: &aeq_work->work);
832 /* clear aeq_len to avoid hw access host memory */
833 hinic_hwif_write_reg(hwif: eq->hwif,
834 HINIC_CSR_AEQ_CTRL_1_ADDR(eq->q_id), val: 0);
835 } else if (eq->type == HINIC_CEQ) {
836 tasklet_kill(t: &eq->ceq_tasklet);
837 /* clear ceq_len to avoid hw access host memory */
838 hinic_hwif_write_reg(hwif: eq->hwif,
839 HINIC_CSR_CEQ_CTRL_1_ADDR(eq->q_id), val: 0);
840 }
841
842 /* update cons_idx to avoid invalid interrupt */
843 eq->cons_idx = hinic_hwif_read_reg(hwif: eq->hwif, EQ_PROD_IDX_REG_ADDR(eq));
844 eq_update_ci(eq, arm_state: EQ_NOT_ARMED);
845
846 free_eq_pages(eq);
847}
848
849/**
850 * hinic_aeqs_init - initialize all the aeqs
851 * @aeqs: pointer to Async eqs of the chip
852 * @hwif: the HW interface of a PCI function device
853 * @num_aeqs: number of AEQs
854 * @q_len: number of EQ elements
855 * @page_size: the page size of the pages in the event queue
856 * @msix_entries: msix entries associated with the event queues
857 *
858 * Return 0 - Success, negative - Failure
859 **/
860int hinic_aeqs_init(struct hinic_aeqs *aeqs, struct hinic_hwif *hwif,
861 int num_aeqs, u32 q_len, u32 page_size,
862 struct msix_entry *msix_entries)
863{
864 struct pci_dev *pdev = hwif->pdev;
865 int err, i, q_id;
866
867 aeqs->workq = create_singlethread_workqueue(HINIC_EQS_WQ_NAME);
868 if (!aeqs->workq)
869 return -ENOMEM;
870
871 aeqs->hwif = hwif;
872 aeqs->num_aeqs = num_aeqs;
873
874 for (q_id = 0; q_id < num_aeqs; q_id++) {
875 err = init_eq(eq: &aeqs->aeq[q_id], hwif, type: HINIC_AEQ, q_id, q_len,
876 page_size, entry: msix_entries[q_id]);
877 if (err) {
878 dev_err(&pdev->dev, "Failed to init aeq %d\n", q_id);
879 goto err_init_aeq;
880 }
881 }
882
883 return 0;
884
885err_init_aeq:
886 for (i = 0; i < q_id; i++)
887 remove_eq(eq: &aeqs->aeq[i]);
888
889 destroy_workqueue(wq: aeqs->workq);
890 return err;
891}
892
893/**
894 * hinic_aeqs_free - free all the aeqs
895 * @aeqs: pointer to Async eqs of the chip
896 **/
897void hinic_aeqs_free(struct hinic_aeqs *aeqs)
898{
899 int q_id;
900
901 for (q_id = 0; q_id < aeqs->num_aeqs ; q_id++)
902 remove_eq(eq: &aeqs->aeq[q_id]);
903
904 destroy_workqueue(wq: aeqs->workq);
905}
906
907/**
908 * hinic_ceqs_init - init all the ceqs
909 * @ceqs: ceqs part of the chip
910 * @hwif: the hardware interface of a pci function device
911 * @num_ceqs: number of CEQs
912 * @q_len: number of EQ elements
913 * @page_size: the page size of the event queue
914 * @msix_entries: msix entries associated with the event queues
915 *
916 * Return 0 - Success, Negative - Failure
917 **/
918int hinic_ceqs_init(struct hinic_ceqs *ceqs, struct hinic_hwif *hwif,
919 int num_ceqs, u32 q_len, u32 page_size,
920 struct msix_entry *msix_entries)
921{
922 struct pci_dev *pdev = hwif->pdev;
923 int i, q_id, err;
924
925 ceqs->hwif = hwif;
926 ceqs->num_ceqs = num_ceqs;
927
928 for (q_id = 0; q_id < num_ceqs; q_id++) {
929 ceqs->ceq[q_id].hwdev = ceqs->hwdev;
930 err = init_eq(eq: &ceqs->ceq[q_id], hwif, type: HINIC_CEQ, q_id, q_len,
931 page_size, entry: msix_entries[q_id]);
932 if (err) {
933 dev_err(&pdev->dev, "Failed to init ceq %d\n", q_id);
934 goto err_init_ceq;
935 }
936 }
937
938 return 0;
939
940err_init_ceq:
941 for (i = 0; i < q_id; i++)
942 remove_eq(eq: &ceqs->ceq[i]);
943
944 return err;
945}
946
947/**
948 * hinic_ceqs_free - free all the ceqs
949 * @ceqs: ceqs part of the chip
950 **/
951void hinic_ceqs_free(struct hinic_ceqs *ceqs)
952{
953 int q_id;
954
955 for (q_id = 0; q_id < ceqs->num_ceqs; q_id++)
956 remove_eq(eq: &ceqs->ceq[q_id]);
957}
958
959void hinic_dump_ceq_info(struct hinic_hwdev *hwdev)
960{
961 struct hinic_eq *eq = NULL;
962 u32 addr, ci, pi;
963 int q_id;
964
965 for (q_id = 0; q_id < hwdev->func_to_io.ceqs.num_ceqs; q_id++) {
966 eq = &hwdev->func_to_io.ceqs.ceq[q_id];
967 addr = EQ_CONS_IDX_REG_ADDR(eq);
968 ci = hinic_hwif_read_reg(hwif: hwdev->hwif, reg: addr);
969 addr = EQ_PROD_IDX_REG_ADDR(eq);
970 pi = hinic_hwif_read_reg(hwif: hwdev->hwif, reg: addr);
971 dev_err(&hwdev->hwif->pdev->dev, "Ceq id: %d, ci: 0x%08x, sw_ci: 0x%08x, pi: 0x%x, tasklet_state: 0x%lx, wrap: %d, ceqe: 0x%x\n",
972 q_id, ci, eq->cons_idx, pi,
973 eq->ceq_tasklet.state,
974 eq->wrapped, be32_to_cpu(*(__be32 *)(GET_CURR_CEQ_ELEM(eq))));
975 }
976}
977
978void hinic_dump_aeq_info(struct hinic_hwdev *hwdev)
979{
980 struct hinic_aeq_elem *aeqe_pos = NULL;
981 struct hinic_eq *eq = NULL;
982 u32 addr, ci, pi;
983 int q_id;
984
985 for (q_id = 0; q_id < hwdev->aeqs.num_aeqs; q_id++) {
986 eq = &hwdev->aeqs.aeq[q_id];
987 addr = EQ_CONS_IDX_REG_ADDR(eq);
988 ci = hinic_hwif_read_reg(hwif: hwdev->hwif, reg: addr);
989 addr = EQ_PROD_IDX_REG_ADDR(eq);
990 pi = hinic_hwif_read_reg(hwif: hwdev->hwif, reg: addr);
991 aeqe_pos = GET_CURR_AEQ_ELEM(eq);
992 dev_err(&hwdev->hwif->pdev->dev, "Aeq id: %d, ci: 0x%08x, pi: 0x%x, work_state: 0x%x, wrap: %d, desc: 0x%x\n",
993 q_id, ci, pi, work_busy(&eq->aeq_work.work),
994 eq->wrapped, be32_to_cpu(aeqe_pos->desc));
995 }
996}
997

source code of linux/drivers/net/ethernet/huawei/hinic/hinic_hw_eqs.c