1 // SPDX-License-Identifier: GPL-2.0-only
3 * Huawei HiNIC PCI Express Linux driver
4 * Copyright(c) 2017 Huawei Technologies Co., Ltd
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/slab.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/bitops.h>
15 #include <linux/err.h>
16 #include <linux/jiffies.h>
17 #include <linux/delay.h>
18 #include <linux/log2.h>
19 #include <linux/semaphore.h>
20 #include <asm/byteorder.h>
21 #include <asm/barrier.h>
23 #include "hinic_hw_csr.h"
24 #include "hinic_hw_if.h"
25 #include "hinic_hw_api_cmd.h"
27 #define API_CHAIN_NUM_CELLS 32
29 #define API_CMD_CELL_SIZE_SHIFT 6
30 #define API_CMD_CELL_SIZE_MIN (BIT(API_CMD_CELL_SIZE_SHIFT))
32 #define API_CMD_CELL_SIZE(cell_size) \
33 (((cell_size) >= API_CMD_CELL_SIZE_MIN) ? \
34 (1 << (fls(cell_size - 1))) : API_CMD_CELL_SIZE_MIN)
36 #define API_CMD_CELL_SIZE_VAL(size) \
37 ilog2((size) >> API_CMD_CELL_SIZE_SHIFT)
39 #define API_CMD_BUF_SIZE 2048
41 /* Sizes of the members in hinic_api_cmd_cell */
42 #define API_CMD_CELL_DESC_SIZE 8
43 #define API_CMD_CELL_DATA_ADDR_SIZE 8
45 #define API_CMD_CELL_ALIGNMENT 8
47 #define API_CMD_TIMEOUT 1000
49 #define MASKED_IDX(chain, idx) ((idx) & ((chain)->num_cells - 1))
51 #define SIZE_8BYTES(size) (ALIGN((size), 8) >> 3)
52 #define SIZE_4BYTES(size) (ALIGN((size), 4) >> 2)
54 #define RD_DMA_ATTR_DEFAULT 0
55 #define WR_DMA_ATTR_DEFAULT 0
57 enum api_cmd_data_format {
58 SGE_DATA = 1, /* cell data is passed by hw address */
70 enum api_cmd_xor_chk_level {
76 static u8 xor_chksum_set(void *data)
79 u8 *val, checksum = 0;
83 for (idx = 0; idx < 7; idx++)
89 static void set_prod_idx(struct hinic_api_cmd_chain *chain)
91 enum hinic_api_cmd_chain_type chain_type = chain->chain_type;
92 struct hinic_hwif *hwif = chain->hwif;
95 addr = HINIC_CSR_API_CMD_CHAIN_PI_ADDR(chain_type);
96 prod_idx = hinic_hwif_read_reg(hwif, addr);
98 prod_idx = HINIC_API_CMD_PI_CLEAR(prod_idx, IDX);
100 prod_idx |= HINIC_API_CMD_PI_SET(chain->prod_idx, IDX);
102 hinic_hwif_write_reg(hwif, addr, prod_idx);
105 static u32 get_hw_cons_idx(struct hinic_api_cmd_chain *chain)
109 addr = HINIC_CSR_API_CMD_STATUS_ADDR(chain->chain_type);
110 val = hinic_hwif_read_reg(chain->hwif, addr);
112 return HINIC_API_CMD_STATUS_GET(val, CONS_IDX);
115 static void dump_api_chain_reg(struct hinic_api_cmd_chain *chain)
119 addr = HINIC_CSR_API_CMD_STATUS_ADDR(chain->chain_type);
120 val = hinic_hwif_read_reg(chain->hwif, addr);
122 dev_err(&chain->hwif->pdev->dev, "Chain type: 0x%x, cpld error: 0x%x, check error: 0x%x, current fsm: 0x%x\n",
123 chain->chain_type, HINIC_API_CMD_STATUS_GET(val, CPLD_ERR),
124 HINIC_API_CMD_STATUS_GET(val, CHKSUM_ERR),
125 HINIC_API_CMD_STATUS_GET(val, FSM));
127 dev_err(&chain->hwif->pdev->dev, "Chain hw current ci: 0x%x\n",
128 HINIC_API_CMD_STATUS_GET(val, CONS_IDX));
130 addr = HINIC_CSR_API_CMD_CHAIN_PI_ADDR(chain->chain_type);
131 val = hinic_hwif_read_reg(chain->hwif, addr);
132 dev_err(&chain->hwif->pdev->dev, "Chain hw current pi: 0x%x\n", val);
136 * chain_busy - check if the chain is still processing last requests
137 * @chain: chain to check
139 * Return 0 - Success, negative - Failure
141 static int chain_busy(struct hinic_api_cmd_chain *chain)
143 struct hinic_hwif *hwif = chain->hwif;
144 struct pci_dev *pdev = hwif->pdev;
147 switch (chain->chain_type) {
148 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
149 chain->cons_idx = get_hw_cons_idx(chain);
150 prod_idx = chain->prod_idx;
152 /* check for a space for a new command */
153 if (chain->cons_idx == MASKED_IDX(chain, prod_idx + 1)) {
154 dev_err(&pdev->dev, "API CMD chain %d is busy, cons_idx: %d, prod_idx: %d\n",
155 chain->chain_type, chain->cons_idx,
157 dump_api_chain_reg(chain);
163 dev_err(&pdev->dev, "Unknown API CMD Chain type\n");
171 * get_cell_data_size - get the data size of a specific cell type
174 * Return the data(Desc + Address) size in the cell
176 static u8 get_cell_data_size(enum hinic_api_cmd_chain_type type)
178 u8 cell_data_size = 0;
181 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
182 cell_data_size = ALIGN(API_CMD_CELL_DESC_SIZE +
183 API_CMD_CELL_DATA_ADDR_SIZE,
184 API_CMD_CELL_ALIGNMENT);
190 return cell_data_size;
194 * prepare_cell_ctrl - prepare the ctrl of the cell for the command
195 * @cell_ctrl: the control of the cell to set the control value into it
196 * @data_size: the size of the data in the cell
198 static void prepare_cell_ctrl(u64 *cell_ctrl, u16 data_size)
203 ctrl = HINIC_API_CMD_CELL_CTRL_SET(SIZE_8BYTES(data_size), DATA_SZ) |
204 HINIC_API_CMD_CELL_CTRL_SET(RD_DMA_ATTR_DEFAULT, RD_DMA_ATTR) |
205 HINIC_API_CMD_CELL_CTRL_SET(WR_DMA_ATTR_DEFAULT, WR_DMA_ATTR);
207 chksum = xor_chksum_set(&ctrl);
209 ctrl |= HINIC_API_CMD_CELL_CTRL_SET(chksum, XOR_CHKSUM);
211 /* The data in the HW should be in Big Endian Format */
212 *cell_ctrl = cpu_to_be64(ctrl);
216 * prepare_api_cmd - prepare API CMD command
217 * @chain: chain for the command
218 * @dest: destination node on the card that will receive the command
220 * @cmd_size: the command size
222 static void prepare_api_cmd(struct hinic_api_cmd_chain *chain,
223 enum hinic_node_id dest,
224 void *cmd, u16 cmd_size)
226 struct hinic_api_cmd_cell *cell = chain->curr_node;
227 struct hinic_api_cmd_cell_ctxt *cell_ctxt;
228 struct hinic_hwif *hwif = chain->hwif;
229 struct pci_dev *pdev = hwif->pdev;
231 cell_ctxt = &chain->cell_ctxt[chain->prod_idx];
233 switch (chain->chain_type) {
234 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
235 cell->desc = HINIC_API_CMD_DESC_SET(SGE_DATA, API_TYPE) |
236 HINIC_API_CMD_DESC_SET(API_CMD_WRITE, RD_WR) |
237 HINIC_API_CMD_DESC_SET(NO_BYPASS, MGMT_BYPASS);
241 dev_err(&pdev->dev, "unknown Chain type\n");
245 cell->desc |= HINIC_API_CMD_DESC_SET(dest, DEST) |
246 HINIC_API_CMD_DESC_SET(SIZE_4BYTES(cmd_size), SIZE);
248 cell->desc |= HINIC_API_CMD_DESC_SET(xor_chksum_set(&cell->desc),
251 /* The data in the HW should be in Big Endian Format */
252 cell->desc = cpu_to_be64(cell->desc);
254 memcpy(cell_ctxt->api_cmd_vaddr, cmd, cmd_size);
258 * prepare_cell - prepare cell ctrl and cmd in the current cell
259 * @chain: chain for the command
260 * @dest: destination node on the card that will receive the command
262 * @cmd_size: the command size
264 * Return 0 - Success, negative - Failure
266 static void prepare_cell(struct hinic_api_cmd_chain *chain,
267 enum hinic_node_id dest,
268 void *cmd, u16 cmd_size)
270 struct hinic_api_cmd_cell *curr_node = chain->curr_node;
271 u16 data_size = get_cell_data_size(chain->chain_type);
273 prepare_cell_ctrl(&curr_node->ctrl, data_size);
274 prepare_api_cmd(chain, dest, cmd, cmd_size);
277 static inline void cmd_chain_prod_idx_inc(struct hinic_api_cmd_chain *chain)
279 chain->prod_idx = MASKED_IDX(chain, chain->prod_idx + 1);
283 * api_cmd_status_update - update the status in the chain struct
284 * @chain: chain to update
286 static void api_cmd_status_update(struct hinic_api_cmd_chain *chain)
288 enum hinic_api_cmd_chain_type chain_type;
289 struct hinic_api_cmd_status *wb_status;
290 struct hinic_hwif *hwif = chain->hwif;
291 struct pci_dev *pdev = hwif->pdev;
295 wb_status = chain->wb_status;
296 status_header = be64_to_cpu(wb_status->header);
298 status = be32_to_cpu(wb_status->status);
299 if (HINIC_API_CMD_STATUS_GET(status, CHKSUM_ERR)) {
300 dev_err(&pdev->dev, "API CMD status: Xor check error\n");
304 chain_type = HINIC_API_CMD_STATUS_HEADER_GET(status_header, CHAIN_ID);
305 if (chain_type >= HINIC_API_CMD_MAX) {
306 dev_err(&pdev->dev, "unknown API CMD Chain %d\n", chain_type);
310 chain->cons_idx = HINIC_API_CMD_STATUS_GET(status, CONS_IDX);
314 * wait_for_status_poll - wait for write to api cmd command to complete
315 * @chain: the chain of the command
317 * Return 0 - Success, negative - Failure
319 static int wait_for_status_poll(struct hinic_api_cmd_chain *chain)
321 int err = -ETIMEDOUT;
324 end = jiffies + msecs_to_jiffies(API_CMD_TIMEOUT);
326 api_cmd_status_update(chain);
328 /* wait for CI to be updated - sign for completion */
329 if (chain->cons_idx == chain->prod_idx) {
335 } while (time_before(jiffies, end));
341 * wait_for_api_cmd_completion - wait for command to complete
342 * @chain: chain for the command
344 * Return 0 - Success, negative - Failure
346 static int wait_for_api_cmd_completion(struct hinic_api_cmd_chain *chain)
348 struct hinic_hwif *hwif = chain->hwif;
349 struct pci_dev *pdev = hwif->pdev;
352 switch (chain->chain_type) {
353 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
354 err = wait_for_status_poll(chain);
356 dev_err(&pdev->dev, "API CMD Poll status timeout\n");
357 dump_api_chain_reg(chain);
363 dev_err(&pdev->dev, "unknown API CMD Chain type\n");
372 * api_cmd - API CMD command
373 * @chain: chain for the command
374 * @dest: destination node on the card that will receive the command
376 * @cmd_size: the command size
378 * Return 0 - Success, negative - Failure
380 static int api_cmd(struct hinic_api_cmd_chain *chain,
381 enum hinic_node_id dest, u8 *cmd, u16 cmd_size)
383 struct hinic_api_cmd_cell_ctxt *ctxt;
387 if (chain_busy(chain)) {
392 prepare_cell(chain, dest, cmd, cmd_size);
393 cmd_chain_prod_idx_inc(chain);
395 wmb(); /* inc pi before issue the command */
397 set_prod_idx(chain); /* issue the command */
399 ctxt = &chain->cell_ctxt[chain->prod_idx];
401 chain->curr_node = ctxt->cell_vaddr;
403 err = wait_for_api_cmd_completion(chain);
410 * hinic_api_cmd_write - Write API CMD command
411 * @chain: chain for write command
412 * @dest: destination node on the card that will receive the command
414 * @size: the command size
416 * Return 0 - Success, negative - Failure
418 int hinic_api_cmd_write(struct hinic_api_cmd_chain *chain,
419 enum hinic_node_id dest, u8 *cmd, u16 size)
421 /* Verify the chain type */
422 if (chain->chain_type == HINIC_API_CMD_WRITE_TO_MGMT_CPU)
423 return api_cmd(chain, dest, cmd, size);
429 * api_cmd_hw_restart - restart the chain in the HW
430 * @chain: the API CMD specific chain to restart
432 * Return 0 - Success, negative - Failure
434 static int api_cmd_hw_restart(struct hinic_api_cmd_chain *chain)
436 struct hinic_hwif *hwif = chain->hwif;
437 int err = -ETIMEDOUT;
441 /* Read Modify Write */
442 reg_addr = HINIC_CSR_API_CMD_CHAIN_REQ_ADDR(chain->chain_type);
443 val = hinic_hwif_read_reg(hwif, reg_addr);
445 val = HINIC_API_CMD_CHAIN_REQ_CLEAR(val, RESTART);
446 val |= HINIC_API_CMD_CHAIN_REQ_SET(1, RESTART);
448 hinic_hwif_write_reg(hwif, reg_addr, val);
450 end = jiffies + msecs_to_jiffies(API_CMD_TIMEOUT);
452 val = hinic_hwif_read_reg(hwif, reg_addr);
454 if (!HINIC_API_CMD_CHAIN_REQ_GET(val, RESTART)) {
460 } while (time_before(jiffies, end));
466 * api_cmd_ctrl_init - set the control register of a chain
467 * @chain: the API CMD specific chain to set control register for
469 static void api_cmd_ctrl_init(struct hinic_api_cmd_chain *chain)
471 struct hinic_hwif *hwif = chain->hwif;
475 /* Read Modify Write */
476 addr = HINIC_CSR_API_CMD_CHAIN_CTRL_ADDR(chain->chain_type);
478 cell_size = API_CMD_CELL_SIZE_VAL(chain->cell_size);
480 ctrl = hinic_hwif_read_reg(hwif, addr);
482 ctrl = HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, RESTART_WB_STAT) &
483 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, XOR_ERR) &
484 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, AEQE_EN) &
485 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, XOR_CHK_EN) &
486 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, CELL_SIZE);
488 ctrl |= HINIC_API_CMD_CHAIN_CTRL_SET(1, XOR_ERR) |
489 HINIC_API_CMD_CHAIN_CTRL_SET(XOR_CHK_ALL, XOR_CHK_EN) |
490 HINIC_API_CMD_CHAIN_CTRL_SET(cell_size, CELL_SIZE);
492 hinic_hwif_write_reg(hwif, addr, ctrl);
496 * api_cmd_set_status_addr - set the status address of a chain in the HW
497 * @chain: the API CMD specific chain to set in HW status address for
499 static void api_cmd_set_status_addr(struct hinic_api_cmd_chain *chain)
501 struct hinic_hwif *hwif = chain->hwif;
504 addr = HINIC_CSR_API_CMD_STATUS_HI_ADDR(chain->chain_type);
505 val = upper_32_bits(chain->wb_status_paddr);
506 hinic_hwif_write_reg(hwif, addr, val);
508 addr = HINIC_CSR_API_CMD_STATUS_LO_ADDR(chain->chain_type);
509 val = lower_32_bits(chain->wb_status_paddr);
510 hinic_hwif_write_reg(hwif, addr, val);
514 * api_cmd_set_num_cells - set the number cells of a chain in the HW
515 * @chain: the API CMD specific chain to set in HW the number of cells for
517 static void api_cmd_set_num_cells(struct hinic_api_cmd_chain *chain)
519 struct hinic_hwif *hwif = chain->hwif;
522 addr = HINIC_CSR_API_CMD_CHAIN_NUM_CELLS_ADDR(chain->chain_type);
523 val = chain->num_cells;
524 hinic_hwif_write_reg(hwif, addr, val);
528 * api_cmd_head_init - set the head of a chain in the HW
529 * @chain: the API CMD specific chain to set in HW the head for
531 static void api_cmd_head_init(struct hinic_api_cmd_chain *chain)
533 struct hinic_hwif *hwif = chain->hwif;
536 addr = HINIC_CSR_API_CMD_CHAIN_HEAD_HI_ADDR(chain->chain_type);
537 val = upper_32_bits(chain->head_cell_paddr);
538 hinic_hwif_write_reg(hwif, addr, val);
540 addr = HINIC_CSR_API_CMD_CHAIN_HEAD_LO_ADDR(chain->chain_type);
541 val = lower_32_bits(chain->head_cell_paddr);
542 hinic_hwif_write_reg(hwif, addr, val);
546 * api_cmd_chain_hw_clean - clean the HW
547 * @chain: the API CMD specific chain
549 static void api_cmd_chain_hw_clean(struct hinic_api_cmd_chain *chain)
551 struct hinic_hwif *hwif = chain->hwif;
554 addr = HINIC_CSR_API_CMD_CHAIN_CTRL_ADDR(chain->chain_type);
556 ctrl = hinic_hwif_read_reg(hwif, addr);
557 ctrl = HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, RESTART_WB_STAT) &
558 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, XOR_ERR) &
559 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, AEQE_EN) &
560 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, XOR_CHK_EN) &
561 HINIC_API_CMD_CHAIN_CTRL_CLEAR(ctrl, CELL_SIZE);
563 hinic_hwif_write_reg(hwif, addr, ctrl);
567 * api_cmd_chain_hw_init - initialize the chain in the HW
568 * @chain: the API CMD specific chain to initialize in HW
570 * Return 0 - Success, negative - Failure
572 static int api_cmd_chain_hw_init(struct hinic_api_cmd_chain *chain)
574 struct hinic_hwif *hwif = chain->hwif;
575 struct pci_dev *pdev = hwif->pdev;
578 api_cmd_chain_hw_clean(chain);
580 api_cmd_set_status_addr(chain);
582 err = api_cmd_hw_restart(chain);
584 dev_err(&pdev->dev, "Failed to restart API CMD HW\n");
588 api_cmd_ctrl_init(chain);
589 api_cmd_set_num_cells(chain);
590 api_cmd_head_init(chain);
595 * free_cmd_buf - free the dma buffer of API CMD command
596 * @chain: the API CMD specific chain of the cmd
597 * @cell_idx: the cell index of the cmd
599 static void free_cmd_buf(struct hinic_api_cmd_chain *chain, int cell_idx)
601 struct hinic_api_cmd_cell_ctxt *cell_ctxt;
602 struct hinic_hwif *hwif = chain->hwif;
603 struct pci_dev *pdev = hwif->pdev;
605 cell_ctxt = &chain->cell_ctxt[cell_idx];
607 dma_free_coherent(&pdev->dev, API_CMD_BUF_SIZE,
608 cell_ctxt->api_cmd_vaddr,
609 cell_ctxt->api_cmd_paddr);
613 * alloc_cmd_buf - allocate a dma buffer for API CMD command
614 * @chain: the API CMD specific chain for the cmd
615 * @cell: the cell in the HW for the cmd
616 * @cell_idx: the index of the cell
618 * Return 0 - Success, negative - Failure
620 static int alloc_cmd_buf(struct hinic_api_cmd_chain *chain,
621 struct hinic_api_cmd_cell *cell, int cell_idx)
623 struct hinic_api_cmd_cell_ctxt *cell_ctxt;
624 struct hinic_hwif *hwif = chain->hwif;
625 struct pci_dev *pdev = hwif->pdev;
626 dma_addr_t cmd_paddr;
630 cmd_vaddr = dma_alloc_coherent(&pdev->dev, API_CMD_BUF_SIZE,
631 &cmd_paddr, GFP_KERNEL);
635 cell_ctxt = &chain->cell_ctxt[cell_idx];
637 cell_ctxt->api_cmd_vaddr = cmd_vaddr;
638 cell_ctxt->api_cmd_paddr = cmd_paddr;
640 /* set the cmd DMA address in the cell */
641 switch (chain->chain_type) {
642 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
643 /* The data in the HW should be in Big Endian Format */
644 cell->write.hw_cmd_paddr = cpu_to_be64(cmd_paddr);
648 dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
649 free_cmd_buf(chain, cell_idx);
658 * api_cmd_create_cell - create API CMD cell for specific chain
659 * @chain: the API CMD specific chain to create its cell
660 * @cell_idx: the index of the cell to create
661 * @pre_node: previous cell
662 * @node_vaddr: the returned virt addr of the cell
664 * Return 0 - Success, negative - Failure
666 static int api_cmd_create_cell(struct hinic_api_cmd_chain *chain,
668 struct hinic_api_cmd_cell *pre_node,
669 struct hinic_api_cmd_cell **node_vaddr)
671 struct hinic_api_cmd_cell_ctxt *cell_ctxt;
672 struct hinic_hwif *hwif = chain->hwif;
673 struct pci_dev *pdev = hwif->pdev;
674 struct hinic_api_cmd_cell *node;
675 dma_addr_t node_paddr;
678 node = dma_alloc_coherent(&pdev->dev, chain->cell_size, &node_paddr,
683 node->read.hw_wb_resp_paddr = 0;
685 cell_ctxt = &chain->cell_ctxt[cell_idx];
686 cell_ctxt->cell_vaddr = node;
687 cell_ctxt->cell_paddr = node_paddr;
690 chain->head_cell_paddr = node_paddr;
691 chain->head_node = node;
693 /* The data in the HW should be in Big Endian Format */
694 pre_node->next_cell_paddr = cpu_to_be64(node_paddr);
697 switch (chain->chain_type) {
698 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
699 err = alloc_cmd_buf(chain, node, cell_idx);
701 dev_err(&pdev->dev, "Failed to allocate cmd buffer\n");
702 goto err_alloc_cmd_buf;
707 dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
709 goto err_alloc_cmd_buf;
716 dma_free_coherent(&pdev->dev, chain->cell_size, node, node_paddr);
721 * api_cmd_destroy_cell - destroy API CMD cell of specific chain
722 * @chain: the API CMD specific chain to destroy its cell
723 * @cell_idx: the cell to destroy
725 static void api_cmd_destroy_cell(struct hinic_api_cmd_chain *chain,
728 struct hinic_api_cmd_cell_ctxt *cell_ctxt;
729 struct hinic_hwif *hwif = chain->hwif;
730 struct pci_dev *pdev = hwif->pdev;
731 struct hinic_api_cmd_cell *node;
732 dma_addr_t node_paddr;
735 cell_ctxt = &chain->cell_ctxt[cell_idx];
737 node = cell_ctxt->cell_vaddr;
738 node_paddr = cell_ctxt->cell_paddr;
739 node_size = chain->cell_size;
741 if (cell_ctxt->api_cmd_vaddr) {
742 switch (chain->chain_type) {
743 case HINIC_API_CMD_WRITE_TO_MGMT_CPU:
744 free_cmd_buf(chain, cell_idx);
747 dev_err(&pdev->dev, "Unsupported API CMD chain type\n");
751 dma_free_coherent(&pdev->dev, node_size, node,
757 * api_cmd_destroy_cells - destroy API CMD cells of specific chain
758 * @chain: the API CMD specific chain to destroy its cells
759 * @num_cells: number of cells to destroy
761 static void api_cmd_destroy_cells(struct hinic_api_cmd_chain *chain,
766 for (cell_idx = 0; cell_idx < num_cells; cell_idx++)
767 api_cmd_destroy_cell(chain, cell_idx);
771 * api_cmd_create_cells - create API CMD cells for specific chain
772 * @chain: the API CMD specific chain
774 * Return 0 - Success, negative - Failure
776 static int api_cmd_create_cells(struct hinic_api_cmd_chain *chain)
778 struct hinic_api_cmd_cell *node = NULL, *pre_node = NULL;
779 struct hinic_hwif *hwif = chain->hwif;
780 struct pci_dev *pdev = hwif->pdev;
783 for (cell_idx = 0; cell_idx < chain->num_cells; cell_idx++) {
784 err = api_cmd_create_cell(chain, cell_idx, pre_node, &node);
786 dev_err(&pdev->dev, "Failed to create API CMD cell\n");
787 goto err_create_cell;
793 /* set the Final node to point on the start */
794 node->next_cell_paddr = cpu_to_be64(chain->head_cell_paddr);
796 /* set the current node to be the head */
797 chain->curr_node = chain->head_node;
801 api_cmd_destroy_cells(chain, cell_idx);
806 * api_chain_init - initialize API CMD specific chain
807 * @chain: the API CMD specific chain to initialize
808 * @attr: attributes to set in the chain
810 * Return 0 - Success, negative - Failure
812 static int api_chain_init(struct hinic_api_cmd_chain *chain,
813 struct hinic_api_cmd_chain_attr *attr)
815 struct hinic_hwif *hwif = attr->hwif;
816 struct pci_dev *pdev = hwif->pdev;
819 chain->chain_type = attr->chain_type;
820 chain->num_cells = attr->num_cells;
821 chain->cell_size = attr->cell_size;
826 sema_init(&chain->sem, 1);
828 chain->cell_ctxt = devm_kcalloc(&pdev->dev, chain->num_cells,
829 sizeof(*chain->cell_ctxt), GFP_KERNEL);
830 if (!chain->cell_ctxt)
833 chain->wb_status = dma_alloc_coherent(&pdev->dev,
834 sizeof(*chain->wb_status),
835 &chain->wb_status_paddr,
837 if (!chain->wb_status) {
838 dev_err(&pdev->dev, "Failed to allocate DMA wb status\n");
846 * api_chain_free - free API CMD specific chain
847 * @chain: the API CMD specific chain to free
849 static void api_chain_free(struct hinic_api_cmd_chain *chain)
851 struct hinic_hwif *hwif = chain->hwif;
852 struct pci_dev *pdev = hwif->pdev;
854 dma_free_coherent(&pdev->dev, sizeof(*chain->wb_status),
855 chain->wb_status, chain->wb_status_paddr);
859 * api_cmd_create_chain - create API CMD specific chain
860 * @attr: attributes to set the chain
862 * Return the created chain
864 static struct hinic_api_cmd_chain *
865 api_cmd_create_chain(struct hinic_api_cmd_chain_attr *attr)
867 struct hinic_hwif *hwif = attr->hwif;
868 struct pci_dev *pdev = hwif->pdev;
869 struct hinic_api_cmd_chain *chain;
872 if (attr->num_cells & (attr->num_cells - 1)) {
873 dev_err(&pdev->dev, "Invalid number of cells, must be power of 2\n");
874 return ERR_PTR(-EINVAL);
877 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
879 return ERR_PTR(-ENOMEM);
881 err = api_chain_init(chain, attr);
883 dev_err(&pdev->dev, "Failed to initialize chain\n");
887 err = api_cmd_create_cells(chain);
889 dev_err(&pdev->dev, "Failed to create cells for API CMD chain\n");
890 goto err_create_cells;
893 err = api_cmd_chain_hw_init(chain);
895 dev_err(&pdev->dev, "Failed to initialize chain HW\n");
896 goto err_chain_hw_init;
902 api_cmd_destroy_cells(chain, chain->num_cells);
905 api_chain_free(chain);
910 * api_cmd_destroy_chain - destroy API CMD specific chain
911 * @chain: the API CMD specific chain to destroy
913 static void api_cmd_destroy_chain(struct hinic_api_cmd_chain *chain)
915 api_cmd_chain_hw_clean(chain);
916 api_cmd_destroy_cells(chain, chain->num_cells);
917 api_chain_free(chain);
921 * hinic_api_cmd_init - Initialize all the API CMD chains
922 * @chain: the API CMD chains that are initialized
923 * @hwif: the hardware interface of a pci function device
925 * Return 0 - Success, negative - Failure
927 int hinic_api_cmd_init(struct hinic_api_cmd_chain **chain,
928 struct hinic_hwif *hwif)
930 enum hinic_api_cmd_chain_type type, chain_type;
931 struct hinic_api_cmd_chain_attr attr;
932 struct pci_dev *pdev = hwif->pdev;
936 hw_cell_sz = sizeof(struct hinic_api_cmd_cell);
939 attr.num_cells = API_CHAIN_NUM_CELLS;
940 attr.cell_size = API_CMD_CELL_SIZE(hw_cell_sz);
942 chain_type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
943 for ( ; chain_type < HINIC_API_CMD_MAX; chain_type++) {
944 attr.chain_type = chain_type;
946 if (chain_type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
949 chain[chain_type] = api_cmd_create_chain(&attr);
950 if (IS_ERR(chain[chain_type])) {
951 dev_err(&pdev->dev, "Failed to create chain %d\n",
953 err = PTR_ERR(chain[chain_type]);
954 goto err_create_chain;
961 type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
962 for ( ; type < chain_type; type++) {
963 if (type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
966 api_cmd_destroy_chain(chain[type]);
973 * hinic_api_cmd_free - free the API CMD chains
974 * @chain: the API CMD chains that are freed
976 void hinic_api_cmd_free(struct hinic_api_cmd_chain **chain)
978 enum hinic_api_cmd_chain_type chain_type;
980 chain_type = HINIC_API_CMD_WRITE_TO_MGMT_CPU;
981 for ( ; chain_type < HINIC_API_CMD_MAX; chain_type++) {
982 if (chain_type != HINIC_API_CMD_WRITE_TO_MGMT_CPU)
985 api_cmd_destroy_chain(chain[chain_type]);