1// SPDX-License-Identifier: GPL-2.0
2/* Marvell Octeon EP (EndPoint) Ethernet Driver
3 *
4 * Copyright (C) 2020 Marvell.
5 *
6 */
7
8#include <linux/pci.h>
9#include <linux/netdevice.h>
10#include <linux/etherdevice.h>
11
12#include "octep_config.h"
13#include "octep_main.h"
14#include "octep_regs_cnxk_pf.h"
15
16/* We will support 128 pf's in control mbox */
17#define CTRL_MBOX_MAX_PF 128
18#define CTRL_MBOX_SZ ((size_t)(0x400000 / CTRL_MBOX_MAX_PF))
19
20/* Names of Hardware non-queue generic interrupts */
21static char *cnxk_non_ioq_msix_names[] = {
22 "epf_ire_rint",
23 "epf_ore_rint",
24 "epf_vfire_rint",
25 "epf_rsvd0",
26 "epf_vfore_rint",
27 "epf_rsvd1",
28 "epf_mbox_rint",
29 "epf_rsvd2_0",
30 "epf_rsvd2_1",
31 "epf_dma_rint",
32 "epf_dma_vf_rint",
33 "epf_rsvd3",
34 "epf_pp_vf_rint",
35 "epf_rsvd3",
36 "epf_misc_rint",
37 "epf_rsvd5",
38 /* Next 16 are for OEI_RINT */
39 "epf_oei_rint0",
40 "epf_oei_rint1",
41 "epf_oei_rint2",
42 "epf_oei_rint3",
43 "epf_oei_rint4",
44 "epf_oei_rint5",
45 "epf_oei_rint6",
46 "epf_oei_rint7",
47 "epf_oei_rint8",
48 "epf_oei_rint9",
49 "epf_oei_rint10",
50 "epf_oei_rint11",
51 "epf_oei_rint12",
52 "epf_oei_rint13",
53 "epf_oei_rint14",
54 "epf_oei_rint15",
55 /* IOQ interrupt */
56 "octeon_ep"
57};
58
59/* Dump useful hardware CSRs for debug purpose */
60static void cnxk_dump_regs(struct octep_device *oct, int qno)
61{
62 struct device *dev = &oct->pdev->dev;
63
64 dev_info(dev, "IQ-%d register dump\n", qno);
65 dev_info(dev, "R[%d]_IN_INSTR_DBELL[0x%llx]: 0x%016llx\n",
66 qno, CNXK_SDP_R_IN_INSTR_DBELL(qno),
67 octep_read_csr64(oct, CNXK_SDP_R_IN_INSTR_DBELL(qno)));
68 dev_info(dev, "R[%d]_IN_CONTROL[0x%llx]: 0x%016llx\n",
69 qno, CNXK_SDP_R_IN_CONTROL(qno),
70 octep_read_csr64(oct, CNXK_SDP_R_IN_CONTROL(qno)));
71 dev_info(dev, "R[%d]_IN_ENABLE[0x%llx]: 0x%016llx\n",
72 qno, CNXK_SDP_R_IN_ENABLE(qno),
73 octep_read_csr64(oct, CNXK_SDP_R_IN_ENABLE(qno)));
74 dev_info(dev, "R[%d]_IN_INSTR_BADDR[0x%llx]: 0x%016llx\n",
75 qno, CNXK_SDP_R_IN_INSTR_BADDR(qno),
76 octep_read_csr64(oct, CNXK_SDP_R_IN_INSTR_BADDR(qno)));
77 dev_info(dev, "R[%d]_IN_INSTR_RSIZE[0x%llx]: 0x%016llx\n",
78 qno, CNXK_SDP_R_IN_INSTR_RSIZE(qno),
79 octep_read_csr64(oct, CNXK_SDP_R_IN_INSTR_RSIZE(qno)));
80 dev_info(dev, "R[%d]_IN_CNTS[0x%llx]: 0x%016llx\n",
81 qno, CNXK_SDP_R_IN_CNTS(qno),
82 octep_read_csr64(oct, CNXK_SDP_R_IN_CNTS(qno)));
83 dev_info(dev, "R[%d]_IN_INT_LEVELS[0x%llx]: 0x%016llx\n",
84 qno, CNXK_SDP_R_IN_INT_LEVELS(qno),
85 octep_read_csr64(oct, CNXK_SDP_R_IN_INT_LEVELS(qno)));
86 dev_info(dev, "R[%d]_IN_PKT_CNT[0x%llx]: 0x%016llx\n",
87 qno, CNXK_SDP_R_IN_PKT_CNT(qno),
88 octep_read_csr64(oct, CNXK_SDP_R_IN_PKT_CNT(qno)));
89 dev_info(dev, "R[%d]_IN_BYTE_CNT[0x%llx]: 0x%016llx\n",
90 qno, CNXK_SDP_R_IN_BYTE_CNT(qno),
91 octep_read_csr64(oct, CNXK_SDP_R_IN_BYTE_CNT(qno)));
92
93 dev_info(dev, "OQ-%d register dump\n", qno);
94 dev_info(dev, "R[%d]_OUT_SLIST_DBELL[0x%llx]: 0x%016llx\n",
95 qno, CNXK_SDP_R_OUT_SLIST_DBELL(qno),
96 octep_read_csr64(oct, CNXK_SDP_R_OUT_SLIST_DBELL(qno)));
97 dev_info(dev, "R[%d]_OUT_CONTROL[0x%llx]: 0x%016llx\n",
98 qno, CNXK_SDP_R_OUT_CONTROL(qno),
99 octep_read_csr64(oct, CNXK_SDP_R_OUT_CONTROL(qno)));
100 dev_info(dev, "R[%d]_OUT_ENABLE[0x%llx]: 0x%016llx\n",
101 qno, CNXK_SDP_R_OUT_ENABLE(qno),
102 octep_read_csr64(oct, CNXK_SDP_R_OUT_ENABLE(qno)));
103 dev_info(dev, "R[%d]_OUT_SLIST_BADDR[0x%llx]: 0x%016llx\n",
104 qno, CNXK_SDP_R_OUT_SLIST_BADDR(qno),
105 octep_read_csr64(oct, CNXK_SDP_R_OUT_SLIST_BADDR(qno)));
106 dev_info(dev, "R[%d]_OUT_SLIST_RSIZE[0x%llx]: 0x%016llx\n",
107 qno, CNXK_SDP_R_OUT_SLIST_RSIZE(qno),
108 octep_read_csr64(oct, CNXK_SDP_R_OUT_SLIST_RSIZE(qno)));
109 dev_info(dev, "R[%d]_OUT_CNTS[0x%llx]: 0x%016llx\n",
110 qno, CNXK_SDP_R_OUT_CNTS(qno),
111 octep_read_csr64(oct, CNXK_SDP_R_OUT_CNTS(qno)));
112 dev_info(dev, "R[%d]_OUT_INT_LEVELS[0x%llx]: 0x%016llx\n",
113 qno, CNXK_SDP_R_OUT_INT_LEVELS(qno),
114 octep_read_csr64(oct, CNXK_SDP_R_OUT_INT_LEVELS(qno)));
115 dev_info(dev, "R[%d]_OUT_PKT_CNT[0x%llx]: 0x%016llx\n",
116 qno, CNXK_SDP_R_OUT_PKT_CNT(qno),
117 octep_read_csr64(oct, CNXK_SDP_R_OUT_PKT_CNT(qno)));
118 dev_info(dev, "R[%d]_OUT_BYTE_CNT[0x%llx]: 0x%016llx\n",
119 qno, CNXK_SDP_R_OUT_BYTE_CNT(qno),
120 octep_read_csr64(oct, CNXK_SDP_R_OUT_BYTE_CNT(qno)));
121 dev_info(dev, "R[%d]_ERR_TYPE[0x%llx]: 0x%016llx\n",
122 qno, CNXK_SDP_R_ERR_TYPE(qno),
123 octep_read_csr64(oct, CNXK_SDP_R_ERR_TYPE(qno)));
124}
125
126/* Reset Hardware Tx queue */
127static int cnxk_reset_iq(struct octep_device *oct, int q_no)
128{
129 struct octep_config *conf = oct->conf;
130 u64 val = 0ULL;
131
132 dev_dbg(&oct->pdev->dev, "Reset PF IQ-%d\n", q_no);
133
134 /* Get absolute queue number */
135 q_no += conf->pf_ring_cfg.srn;
136
137 /* Disable the Tx/Instruction Ring */
138 octep_write_csr64(oct, CNXK_SDP_R_IN_ENABLE(q_no), val);
139
140 /* clear the Instruction Ring packet/byte counts and doorbell CSRs */
141 octep_write_csr64(oct, CNXK_SDP_R_IN_CNTS(q_no), val);
142 octep_write_csr64(oct, CNXK_SDP_R_IN_INT_LEVELS(q_no), val);
143 octep_write_csr64(oct, CNXK_SDP_R_IN_PKT_CNT(q_no), val);
144 octep_write_csr64(oct, CNXK_SDP_R_IN_BYTE_CNT(q_no), val);
145 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_BADDR(q_no), val);
146 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_RSIZE(q_no), val);
147
148 val = 0xFFFFFFFF;
149 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_DBELL(q_no), val);
150
151 return 0;
152}
153
154/* Reset Hardware Rx queue */
155static void cnxk_reset_oq(struct octep_device *oct, int q_no)
156{
157 u64 val = 0ULL;
158
159 q_no += CFG_GET_PORTS_PF_SRN(oct->conf);
160
161 /* Disable Output (Rx) Ring */
162 octep_write_csr64(oct, CNXK_SDP_R_OUT_ENABLE(q_no), val);
163 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_BADDR(q_no), val);
164 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_RSIZE(q_no), val);
165 octep_write_csr64(oct, CNXK_SDP_R_OUT_INT_LEVELS(q_no), val);
166
167 /* Clear count CSRs */
168 val = octep_read_csr(oct, CNXK_SDP_R_OUT_CNTS(q_no));
169 octep_write_csr(oct, CNXK_SDP_R_OUT_CNTS(q_no), val);
170
171 octep_write_csr64(oct, CNXK_SDP_R_OUT_PKT_CNT(q_no), 0xFFFFFFFFFULL);
172 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_DBELL(q_no), 0xFFFFFFFF);
173}
174
175/* Reset all hardware Tx/Rx queues */
176static void octep_reset_io_queues_cnxk_pf(struct octep_device *oct)
177{
178 struct pci_dev *pdev = oct->pdev;
179 int q;
180
181 dev_dbg(&pdev->dev, "Reset OCTEP_CNXK PF IO Queues\n");
182
183 for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
184 cnxk_reset_iq(oct, q_no: q);
185 cnxk_reset_oq(oct, q_no: q);
186 }
187}
188
189/* Initialize windowed addresses to access some hardware registers */
190static void octep_setup_pci_window_regs_cnxk_pf(struct octep_device *oct)
191{
192 u8 __iomem *bar0_pciaddr = oct->mmio[0].hw_addr;
193
194 oct->pci_win_regs.pci_win_wr_addr = (u8 __iomem *)(bar0_pciaddr + CNXK_SDP_WIN_WR_ADDR64);
195 oct->pci_win_regs.pci_win_rd_addr = (u8 __iomem *)(bar0_pciaddr + CNXK_SDP_WIN_RD_ADDR64);
196 oct->pci_win_regs.pci_win_wr_data = (u8 __iomem *)(bar0_pciaddr + CNXK_SDP_WIN_WR_DATA64);
197 oct->pci_win_regs.pci_win_rd_data = (u8 __iomem *)(bar0_pciaddr + CNXK_SDP_WIN_RD_DATA64);
198}
199
200/* Configure Hardware mapping: inform hardware which rings belong to PF. */
201static void octep_configure_ring_mapping_cnxk_pf(struct octep_device *oct)
202{
203 struct octep_config *conf = oct->conf;
204 struct pci_dev *pdev = oct->pdev;
205 u64 pf_srn = CFG_GET_PORTS_PF_SRN(oct->conf);
206 int q;
207
208 for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(conf); q++) {
209 u64 regval = 0;
210
211 if (oct->pcie_port)
212 regval = 8 << CNXK_SDP_FUNC_SEL_EPF_BIT_POS;
213
214 octep_write_csr64(oct, CNXK_SDP_EPVF_RING(pf_srn + q), regval);
215
216 regval = octep_read_csr64(oct, CNXK_SDP_EPVF_RING(pf_srn + q));
217 dev_dbg(&pdev->dev, "Write SDP_EPVF_RING[0x%llx] = 0x%llx\n",
218 CNXK_SDP_EPVF_RING(pf_srn + q), regval);
219 }
220}
221
222/* Initialize configuration limits and initial active config */
223static void octep_init_config_cnxk_pf(struct octep_device *oct)
224{
225 struct octep_config *conf = oct->conf;
226 struct pci_dev *pdev = oct->pdev;
227 u8 link = 0;
228 u64 val;
229 int pos;
230
231 /* Read ring configuration:
232 * PF ring count, number of VFs and rings per VF supported
233 */
234 val = octep_read_csr64(oct, CNXK_SDP_EPF_RINFO);
235 dev_info(&pdev->dev, "SDP_EPF_RINFO[0x%x]:0x%llx\n", CNXK_SDP_EPF_RINFO, val);
236 conf->sriov_cfg.max_rings_per_vf = CNXK_SDP_EPF_RINFO_RPVF(val);
237 conf->sriov_cfg.active_rings_per_vf = conf->sriov_cfg.max_rings_per_vf;
238 conf->sriov_cfg.max_vfs = CNXK_SDP_EPF_RINFO_NVFS(val);
239 conf->sriov_cfg.active_vfs = conf->sriov_cfg.max_vfs;
240 conf->sriov_cfg.vf_srn = CNXK_SDP_EPF_RINFO_SRN(val);
241
242 val = octep_read_csr64(oct, CNXK_SDP_MAC_PF_RING_CTL(oct->pcie_port));
243 dev_info(&pdev->dev, "SDP_MAC_PF_RING_CTL[%d]:0x%llx\n", oct->pcie_port, val);
244 conf->pf_ring_cfg.srn = CNXK_SDP_MAC_PF_RING_CTL_SRN(val);
245 conf->pf_ring_cfg.max_io_rings = CNXK_SDP_MAC_PF_RING_CTL_RPPF(val);
246 conf->pf_ring_cfg.active_io_rings = conf->pf_ring_cfg.max_io_rings;
247 dev_info(&pdev->dev, "pf_srn=%u rpvf=%u nvfs=%u rppf=%u\n",
248 conf->pf_ring_cfg.srn, conf->sriov_cfg.active_rings_per_vf,
249 conf->sriov_cfg.active_vfs, conf->pf_ring_cfg.active_io_rings);
250
251 conf->iq.num_descs = OCTEP_IQ_MAX_DESCRIPTORS;
252 conf->iq.instr_type = OCTEP_64BYTE_INSTR;
253 conf->iq.db_min = OCTEP_DB_MIN;
254 conf->iq.intr_threshold = OCTEP_IQ_INTR_THRESHOLD;
255
256 conf->oq.num_descs = OCTEP_OQ_MAX_DESCRIPTORS;
257 conf->oq.buf_size = OCTEP_OQ_BUF_SIZE;
258 conf->oq.refill_threshold = OCTEP_OQ_REFILL_THRESHOLD;
259 conf->oq.oq_intr_pkt = OCTEP_OQ_INTR_PKT_THRESHOLD;
260 conf->oq.oq_intr_time = OCTEP_OQ_INTR_TIME_THRESHOLD;
261 conf->oq.wmark = OCTEP_OQ_WMARK_MIN;
262
263 conf->msix_cfg.non_ioq_msix = CNXK_NUM_NON_IOQ_INTR;
264 conf->msix_cfg.ioq_msix = conf->pf_ring_cfg.active_io_rings;
265 conf->msix_cfg.non_ioq_msix_names = cnxk_non_ioq_msix_names;
266
267 pos = pci_find_ext_capability(dev: oct->pdev, PCI_EXT_CAP_ID_SRIOV);
268 if (pos) {
269 pci_read_config_byte(dev: oct->pdev,
270 where: pos + PCI_SRIOV_FUNC_LINK,
271 val: &link);
272 link = PCI_DEVFN(PCI_SLOT(oct->pdev->devfn), link);
273 }
274 conf->ctrl_mbox_cfg.barmem_addr = (void __iomem *)oct->mmio[2].hw_addr +
275 CNXK_PEM_BAR4_INDEX_OFFSET +
276 (link * CTRL_MBOX_SZ);
277
278 conf->fw_info.hb_interval = OCTEP_DEFAULT_FW_HB_INTERVAL;
279 conf->fw_info.hb_miss_count = OCTEP_DEFAULT_FW_HB_MISS_COUNT;
280}
281
282/* Setup registers for a hardware Tx Queue */
283static void octep_setup_iq_regs_cnxk_pf(struct octep_device *oct, int iq_no)
284{
285 struct octep_iq *iq = oct->iq[iq_no];
286 u32 reset_instr_cnt;
287 u64 reg_val;
288
289 iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
290 reg_val = octep_read_csr64(oct, CNXK_SDP_R_IN_CONTROL(iq_no));
291
292 /* wait for IDLE to set to 1 */
293 if (!(reg_val & CNXK_R_IN_CTL_IDLE)) {
294 do {
295 reg_val = octep_read_csr64(oct, CNXK_SDP_R_IN_CONTROL(iq_no));
296 } while (!(reg_val & CNXK_R_IN_CTL_IDLE));
297 }
298
299 reg_val |= CNXK_R_IN_CTL_RDSIZE;
300 reg_val |= CNXK_R_IN_CTL_IS_64B;
301 reg_val |= CNXK_R_IN_CTL_ESR;
302 octep_write_csr64(oct, CNXK_SDP_R_IN_CONTROL(iq_no), reg_val);
303
304 /* Write the start of the input queue's ring and its size */
305 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_BADDR(iq_no),
306 iq->desc_ring_dma);
307 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_RSIZE(iq_no),
308 iq->max_count);
309
310 /* Remember the doorbell & instruction count register addr
311 * for this queue
312 */
313 iq->doorbell_reg = oct->mmio[0].hw_addr +
314 CNXK_SDP_R_IN_INSTR_DBELL(iq_no);
315 iq->inst_cnt_reg = oct->mmio[0].hw_addr +
316 CNXK_SDP_R_IN_CNTS(iq_no);
317 iq->intr_lvl_reg = oct->mmio[0].hw_addr +
318 CNXK_SDP_R_IN_INT_LEVELS(iq_no);
319
320 /* Store the current instruction counter (used in flush_iq calculation) */
321 reset_instr_cnt = readl(addr: iq->inst_cnt_reg);
322 writel(val: reset_instr_cnt, addr: iq->inst_cnt_reg);
323
324 /* INTR_THRESHOLD is set to max(FFFFFFFF) to disable the INTR */
325 reg_val = CFG_GET_IQ_INTR_THRESHOLD(oct->conf) & 0xffffffff;
326 octep_write_csr64(oct, CNXK_SDP_R_IN_INT_LEVELS(iq_no), reg_val);
327}
328
329/* Setup registers for a hardware Rx Queue */
330static void octep_setup_oq_regs_cnxk_pf(struct octep_device *oct, int oq_no)
331{
332 u64 reg_val;
333 u64 oq_ctl = 0ULL;
334 u32 time_threshold = 0;
335 struct octep_oq *oq = oct->oq[oq_no];
336
337 oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
338 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_CONTROL(oq_no));
339
340 /* wait for IDLE to set to 1 */
341 if (!(reg_val & CNXK_R_OUT_CTL_IDLE)) {
342 do {
343 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_CONTROL(oq_no));
344 } while (!(reg_val & CNXK_R_OUT_CTL_IDLE));
345 }
346
347 reg_val &= ~(CNXK_R_OUT_CTL_IMODE);
348 reg_val &= ~(CNXK_R_OUT_CTL_ROR_P);
349 reg_val &= ~(CNXK_R_OUT_CTL_NSR_P);
350 reg_val &= ~(CNXK_R_OUT_CTL_ROR_I);
351 reg_val &= ~(CNXK_R_OUT_CTL_NSR_I);
352 reg_val &= ~(CNXK_R_OUT_CTL_ES_I);
353 reg_val &= ~(CNXK_R_OUT_CTL_ROR_D);
354 reg_val &= ~(CNXK_R_OUT_CTL_NSR_D);
355 reg_val &= ~(CNXK_R_OUT_CTL_ES_D);
356 reg_val |= (CNXK_R_OUT_CTL_ES_P);
357
358 octep_write_csr64(oct, CNXK_SDP_R_OUT_CONTROL(oq_no), reg_val);
359 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_BADDR(oq_no),
360 oq->desc_ring_dma);
361 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_RSIZE(oq_no),
362 oq->max_count);
363
364 oq_ctl = octep_read_csr64(oct, CNXK_SDP_R_OUT_CONTROL(oq_no));
365
366 /* Clear the ISIZE and BSIZE (22-0) */
367 oq_ctl &= ~0x7fffffULL;
368
369 /* Populate the BSIZE (15-0) */
370 oq_ctl |= (oq->buffer_size & 0xffff);
371 octep_write_csr64(oct, CNXK_SDP_R_OUT_CONTROL(oq_no), oq_ctl);
372
373 /* Get the mapped address of the pkt_sent and pkts_credit regs */
374 oq->pkts_sent_reg = oct->mmio[0].hw_addr + CNXK_SDP_R_OUT_CNTS(oq_no);
375 oq->pkts_credit_reg = oct->mmio[0].hw_addr +
376 CNXK_SDP_R_OUT_SLIST_DBELL(oq_no);
377
378 time_threshold = CFG_GET_OQ_INTR_TIME(oct->conf);
379 reg_val = ((u64)time_threshold << 32) |
380 CFG_GET_OQ_INTR_PKT(oct->conf);
381 octep_write_csr64(oct, CNXK_SDP_R_OUT_INT_LEVELS(oq_no), reg_val);
382
383 /* set watermark for backpressure */
384 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_WMARK(oq_no));
385 reg_val &= ~0xFFFFFFFFULL;
386 reg_val |= CFG_GET_OQ_WMARK(oct->conf);
387 octep_write_csr64(oct, CNXK_SDP_R_OUT_WMARK(oq_no), reg_val);
388}
389
390/* Setup registers for a PF mailbox */
391static void octep_setup_mbox_regs_cnxk_pf(struct octep_device *oct, int q_no)
392{
393 struct octep_mbox *mbox = oct->mbox[q_no];
394
395 /* PF to VF DATA reg. PF writes into this reg */
396 mbox->pf_vf_data_reg = oct->mmio[0].hw_addr + CNXK_SDP_MBOX_PF_VF_DATA(q_no);
397
398 /* VF to PF DATA reg. PF reads from this reg */
399 mbox->vf_pf_data_reg = oct->mmio[0].hw_addr + CNXK_SDP_MBOX_VF_PF_DATA(q_no);
400}
401
402static void octep_poll_pfvf_mailbox_cnxk_pf(struct octep_device *oct)
403{
404 u32 vf, active_vfs, active_rings_per_vf, vf_mbox_queue;
405 u64 reg0;
406
407 reg0 = octep_read_csr64(oct, CNXK_SDP_EPF_MBOX_RINT(0));
408 if (reg0) {
409 active_vfs = CFG_GET_ACTIVE_VFS(oct->conf);
410 active_rings_per_vf = CFG_GET_ACTIVE_RPVF(oct->conf);
411 for (vf = 0; vf < active_vfs; vf++) {
412 vf_mbox_queue = vf * active_rings_per_vf;
413 if (!(reg0 & (0x1UL << vf_mbox_queue)))
414 continue;
415
416 if (!oct->mbox[vf_mbox_queue]) {
417 dev_err(&oct->pdev->dev, "bad mbox vf %d\n", vf);
418 continue;
419 }
420 schedule_work(work: &oct->mbox[vf_mbox_queue]->wk.work);
421 }
422 if (reg0)
423 octep_write_csr64(oct, CNXK_SDP_EPF_MBOX_RINT(0), reg0);
424 }
425}
426
427static irqreturn_t octep_pfvf_mbox_intr_handler_cnxk_pf(void *dev)
428{
429 struct octep_device *oct = (struct octep_device *)dev;
430
431 octep_poll_pfvf_mailbox_cnxk_pf(oct);
432 return IRQ_HANDLED;
433}
434
435/* Poll OEI events like heartbeat */
436static void octep_poll_oei_cnxk_pf(struct octep_device *oct)
437{
438 u64 reg0;
439
440 /* Check for OEI INTR */
441 reg0 = octep_read_csr64(oct, CNXK_SDP_EPF_OEI_RINT);
442 if (reg0) {
443 octep_write_csr64(oct, CNXK_SDP_EPF_OEI_RINT, reg0);
444 if (reg0 & CNXK_SDP_EPF_OEI_RINT_DATA_BIT_MBOX)
445 queue_work(wq: octep_wq, work: &oct->ctrl_mbox_task);
446 if (reg0 & CNXK_SDP_EPF_OEI_RINT_DATA_BIT_HBEAT)
447 atomic_set(v: &oct->hb_miss_cnt, i: 0);
448 }
449}
450
451/* OEI interrupt handler */
452static irqreturn_t octep_oei_intr_handler_cnxk_pf(void *dev)
453{
454 struct octep_device *oct = (struct octep_device *)dev;
455
456 octep_poll_oei_cnxk_pf(oct);
457 return IRQ_HANDLED;
458}
459
460/* Process non-ioq interrupts required to keep pf interface running.
461 * OEI_RINT is needed for control mailbox
462 * MBOX_RINT is needed for pfvf mailbox
463 */
464static void octep_poll_non_ioq_interrupts_cnxk_pf(struct octep_device *oct)
465{
466 octep_poll_pfvf_mailbox_cnxk_pf(oct);
467 octep_poll_oei_cnxk_pf(oct);
468}
469
470/* Interrupt handler for input ring error interrupts. */
471static irqreturn_t octep_ire_intr_handler_cnxk_pf(void *dev)
472{
473 struct octep_device *oct = (struct octep_device *)dev;
474 struct pci_dev *pdev = oct->pdev;
475 u64 reg_val = 0;
476 int i = 0;
477
478 /* Check for IRERR INTR */
479 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_IRERR_RINT);
480 if (reg_val) {
481 dev_info(&pdev->dev,
482 "received IRERR_RINT intr: 0x%llx\n", reg_val);
483 octep_write_csr64(oct, CNXK_SDP_EPF_IRERR_RINT, reg_val);
484
485 for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++) {
486 reg_val = octep_read_csr64(oct,
487 CNXK_SDP_R_ERR_TYPE(i));
488 if (reg_val) {
489 dev_info(&pdev->dev,
490 "Received err type on IQ-%d: 0x%llx\n",
491 i, reg_val);
492 octep_write_csr64(oct, CNXK_SDP_R_ERR_TYPE(i),
493 reg_val);
494 }
495 }
496 }
497 return IRQ_HANDLED;
498}
499
500/* Interrupt handler for output ring error interrupts. */
501static irqreturn_t octep_ore_intr_handler_cnxk_pf(void *dev)
502{
503 struct octep_device *oct = (struct octep_device *)dev;
504 struct pci_dev *pdev = oct->pdev;
505 u64 reg_val = 0;
506 int i = 0;
507
508 /* Check for ORERR INTR */
509 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_ORERR_RINT);
510 if (reg_val) {
511 dev_info(&pdev->dev,
512 "Received ORERR_RINT intr: 0x%llx\n", reg_val);
513 octep_write_csr64(oct, CNXK_SDP_EPF_ORERR_RINT, reg_val);
514 for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++) {
515 reg_val = octep_read_csr64(oct, CNXK_SDP_R_ERR_TYPE(i));
516 if (reg_val) {
517 dev_info(&pdev->dev,
518 "Received err type on OQ-%d: 0x%llx\n",
519 i, reg_val);
520 octep_write_csr64(oct, CNXK_SDP_R_ERR_TYPE(i),
521 reg_val);
522 }
523 }
524 }
525 return IRQ_HANDLED;
526}
527
528/* Interrupt handler for vf input ring error interrupts. */
529static irqreturn_t octep_vfire_intr_handler_cnxk_pf(void *dev)
530{
531 struct octep_device *oct = (struct octep_device *)dev;
532 struct pci_dev *pdev = oct->pdev;
533 u64 reg_val = 0;
534
535 /* Check for VFIRE INTR */
536 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_VFIRE_RINT(0));
537 if (reg_val) {
538 dev_info(&pdev->dev,
539 "Received VFIRE_RINT intr: 0x%llx\n", reg_val);
540 octep_write_csr64(oct, CNXK_SDP_EPF_VFIRE_RINT(0), reg_val);
541 }
542 return IRQ_HANDLED;
543}
544
545/* Interrupt handler for vf output ring error interrupts. */
546static irqreturn_t octep_vfore_intr_handler_cnxk_pf(void *dev)
547{
548 struct octep_device *oct = (struct octep_device *)dev;
549 struct pci_dev *pdev = oct->pdev;
550 u64 reg_val = 0;
551
552 /* Check for VFORE INTR */
553 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_VFORE_RINT(0));
554 if (reg_val) {
555 dev_info(&pdev->dev,
556 "Received VFORE_RINT intr: 0x%llx\n", reg_val);
557 octep_write_csr64(oct, CNXK_SDP_EPF_VFORE_RINT(0), reg_val);
558 }
559 return IRQ_HANDLED;
560}
561
562/* Interrupt handler for dpi dma related interrupts. */
563static irqreturn_t octep_dma_intr_handler_cnxk_pf(void *dev)
564{
565 struct octep_device *oct = (struct octep_device *)dev;
566 u64 reg_val = 0;
567
568 /* Check for DMA INTR */
569 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_DMA_RINT);
570 if (reg_val)
571 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_RINT, reg_val);
572
573 return IRQ_HANDLED;
574}
575
576/* Interrupt handler for dpi dma transaction error interrupts for VFs */
577static irqreturn_t octep_dma_vf_intr_handler_cnxk_pf(void *dev)
578{
579 struct octep_device *oct = (struct octep_device *)dev;
580 struct pci_dev *pdev = oct->pdev;
581 u64 reg_val = 0;
582
583 /* Check for DMA VF INTR */
584 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_DMA_VF_RINT(0));
585 if (reg_val) {
586 dev_info(&pdev->dev,
587 "Received DMA_VF_RINT intr: 0x%llx\n", reg_val);
588 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_VF_RINT(0), reg_val);
589 }
590 return IRQ_HANDLED;
591}
592
593/* Interrupt handler for pp transaction error interrupts for VFs */
594static irqreturn_t octep_pp_vf_intr_handler_cnxk_pf(void *dev)
595{
596 struct octep_device *oct = (struct octep_device *)dev;
597 struct pci_dev *pdev = oct->pdev;
598 u64 reg_val = 0;
599
600 /* Check for PPVF INTR */
601 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_PP_VF_RINT(0));
602 if (reg_val) {
603 dev_info(&pdev->dev,
604 "Received PP_VF_RINT intr: 0x%llx\n", reg_val);
605 octep_write_csr64(oct, CNXK_SDP_EPF_PP_VF_RINT(0), reg_val);
606 }
607 return IRQ_HANDLED;
608}
609
610/* Interrupt handler for mac related interrupts. */
611static irqreturn_t octep_misc_intr_handler_cnxk_pf(void *dev)
612{
613 struct octep_device *oct = (struct octep_device *)dev;
614 struct pci_dev *pdev = oct->pdev;
615 u64 reg_val = 0;
616
617 /* Check for MISC INTR */
618 reg_val = octep_read_csr64(oct, CNXK_SDP_EPF_MISC_RINT);
619 if (reg_val) {
620 dev_info(&pdev->dev,
621 "Received MISC_RINT intr: 0x%llx\n", reg_val);
622 octep_write_csr64(oct, CNXK_SDP_EPF_MISC_RINT, reg_val);
623 }
624 return IRQ_HANDLED;
625}
626
627/* Interrupts handler for all reserved interrupts. */
628static irqreturn_t octep_rsvd_intr_handler_cnxk_pf(void *dev)
629{
630 struct octep_device *oct = (struct octep_device *)dev;
631 struct pci_dev *pdev = oct->pdev;
632
633 dev_info(&pdev->dev, "Reserved interrupts raised; Ignore\n");
634 return IRQ_HANDLED;
635}
636
637/* Tx/Rx queue interrupt handler */
638static irqreturn_t octep_ioq_intr_handler_cnxk_pf(void *data)
639{
640 struct octep_ioq_vector *vector = (struct octep_ioq_vector *)data;
641 struct octep_oq *oq = vector->oq;
642
643 napi_schedule_irqoff(n: oq->napi);
644 return IRQ_HANDLED;
645}
646
647/* soft reset */
648static int octep_soft_reset_cnxk_pf(struct octep_device *oct)
649{
650 dev_info(&oct->pdev->dev, "CNXKXX: Doing soft reset\n");
651
652 octep_write_csr64(oct, CNXK_SDP_WIN_WR_MASK_REG, 0xFF);
653
654 /* Firmware status CSR is supposed to be cleared by
655 * core domain reset, but due to a hw bug, it is not.
656 * Set it to RUNNING right before reset so that it is not
657 * left in READY (1) state after a reset. This is required
658 * in addition to the early setting to handle the case where
659 * the OcteonTX is unexpectedly reset, reboots, and then
660 * the module is removed.
661 */
662 OCTEP_PCI_WIN_WRITE(oct, CNXK_PEMX_PFX_CSX_PFCFGX(0, 0, CNXK_PCIEEP_VSECST_CTL),
663 FW_STATUS_RUNNING);
664
665 /* Set chip domain reset bit */
666 OCTEP_PCI_WIN_WRITE(oct, CNXK_RST_CHIP_DOMAIN_W1S, val: 1);
667 /* Wait till Octeon resets. */
668 mdelay(10);
669 /* restore the reset value */
670 octep_write_csr64(oct, CNXK_SDP_WIN_WR_MASK_REG, 0xFF);
671
672 return 0;
673}
674
675/* Re-initialize Octeon hardware registers */
676static void octep_reinit_regs_cnxk_pf(struct octep_device *oct)
677{
678 u32 i;
679
680 for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
681 oct->hw_ops.setup_iq_regs(oct, i);
682
683 for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
684 oct->hw_ops.setup_oq_regs(oct, i);
685
686 oct->hw_ops.enable_interrupts(oct);
687 oct->hw_ops.enable_io_queues(oct);
688
689 for (i = 0; i < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); i++)
690 writel(val: oct->oq[i]->max_count, addr: oct->oq[i]->pkts_credit_reg);
691}
692
693/* Enable all interrupts */
694static void octep_enable_interrupts_cnxk_pf(struct octep_device *oct)
695{
696 u64 intr_mask = 0ULL;
697 int srn, num_rings, i;
698
699 srn = CFG_GET_PORTS_PF_SRN(oct->conf);
700 num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
701
702 for (i = 0; i < num_rings; i++)
703 intr_mask |= (0x1ULL << (srn + i));
704
705 octep_write_csr64(oct, CNXK_SDP_EPF_IRERR_RINT_ENA_W1S, intr_mask);
706 octep_write_csr64(oct, CNXK_SDP_EPF_ORERR_RINT_ENA_W1S, intr_mask);
707 octep_write_csr64(oct, CNXK_SDP_EPF_OEI_RINT_ENA_W1S, -1ULL);
708
709 octep_write_csr64(oct, CNXK_SDP_EPF_VFIRE_RINT_ENA_W1S(0), -1ULL);
710 octep_write_csr64(oct, CNXK_SDP_EPF_VFORE_RINT_ENA_W1S(0), -1ULL);
711
712 octep_write_csr64(oct, CNXK_SDP_EPF_MISC_RINT_ENA_W1S, intr_mask);
713 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_RINT_ENA_W1S, intr_mask);
714 octep_write_csr64(oct, CNXK_SDP_EPF_MBOX_RINT_ENA_W1S(0), -1ULL);
715
716 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_VF_RINT_ENA_W1S(0), -1ULL);
717 octep_write_csr64(oct, CNXK_SDP_EPF_PP_VF_RINT_ENA_W1S(0), -1ULL);
718}
719
720/* Disable all interrupts */
721static void octep_disable_interrupts_cnxk_pf(struct octep_device *oct)
722{
723 u64 intr_mask = 0ULL;
724 int srn, num_rings, i;
725
726 srn = CFG_GET_PORTS_PF_SRN(oct->conf);
727 num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
728
729 for (i = 0; i < num_rings; i++)
730 intr_mask |= (0x1ULL << (srn + i));
731
732 octep_write_csr64(oct, CNXK_SDP_EPF_IRERR_RINT_ENA_W1C, intr_mask);
733 octep_write_csr64(oct, CNXK_SDP_EPF_ORERR_RINT_ENA_W1C, intr_mask);
734 octep_write_csr64(oct, CNXK_SDP_EPF_OEI_RINT_ENA_W1C, -1ULL);
735
736 octep_write_csr64(oct, CNXK_SDP_EPF_VFIRE_RINT_ENA_W1C(0), -1ULL);
737 octep_write_csr64(oct, CNXK_SDP_EPF_VFORE_RINT_ENA_W1C(0), -1ULL);
738
739 octep_write_csr64(oct, CNXK_SDP_EPF_MISC_RINT_ENA_W1C, intr_mask);
740 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_RINT_ENA_W1C, intr_mask);
741 octep_write_csr64(oct, CNXK_SDP_EPF_MBOX_RINT_ENA_W1C(0), -1ULL);
742
743 octep_write_csr64(oct, CNXK_SDP_EPF_DMA_VF_RINT_ENA_W1C(0), -1ULL);
744 octep_write_csr64(oct, CNXK_SDP_EPF_PP_VF_RINT_ENA_W1C(0), -1ULL);
745}
746
747/* Get new Octeon Read Index: index of descriptor that Octeon reads next. */
748static u32 octep_update_iq_read_index_cnxk_pf(struct octep_iq *iq)
749{
750 u32 pkt_in_done = readl(addr: iq->inst_cnt_reg);
751 u32 last_done, new_idx;
752
753 last_done = pkt_in_done - iq->pkt_in_done;
754 iq->pkt_in_done = pkt_in_done;
755
756 new_idx = (iq->octep_read_index + last_done) % iq->max_count;
757
758 return new_idx;
759}
760
761/* Enable a hardware Tx Queue */
762static void octep_enable_iq_cnxk_pf(struct octep_device *oct, int iq_no)
763{
764 u64 loop = HZ;
765 u64 reg_val;
766
767 iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
768
769 octep_write_csr64(oct, CNXK_SDP_R_IN_INSTR_DBELL(iq_no), 0xFFFFFFFF);
770
771 while (octep_read_csr64(oct, CNXK_SDP_R_IN_INSTR_DBELL(iq_no)) &&
772 loop--) {
773 schedule_timeout_interruptible(timeout: 1);
774 }
775
776 reg_val = octep_read_csr64(oct, CNXK_SDP_R_IN_INT_LEVELS(iq_no));
777 reg_val |= (0x1ULL << 62);
778 octep_write_csr64(oct, CNXK_SDP_R_IN_INT_LEVELS(iq_no), reg_val);
779
780 reg_val = octep_read_csr64(oct, CNXK_SDP_R_IN_ENABLE(iq_no));
781 reg_val |= 0x1ULL;
782 octep_write_csr64(oct, CNXK_SDP_R_IN_ENABLE(iq_no), reg_val);
783}
784
785/* Enable a hardware Rx Queue */
786static void octep_enable_oq_cnxk_pf(struct octep_device *oct, int oq_no)
787{
788 u64 reg_val = 0ULL;
789
790 oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
791
792 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_INT_LEVELS(oq_no));
793 reg_val |= (0x1ULL << 62);
794 octep_write_csr64(oct, CNXK_SDP_R_OUT_INT_LEVELS(oq_no), reg_val);
795
796 octep_write_csr64(oct, CNXK_SDP_R_OUT_SLIST_DBELL(oq_no), 0xFFFFFFFF);
797
798 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_ENABLE(oq_no));
799 reg_val |= 0x1ULL;
800 octep_write_csr64(oct, CNXK_SDP_R_OUT_ENABLE(oq_no), reg_val);
801}
802
803/* Enable all hardware Tx/Rx Queues assined to PF */
804static void octep_enable_io_queues_cnxk_pf(struct octep_device *oct)
805{
806 u8 q;
807
808 for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
809 octep_enable_iq_cnxk_pf(oct, iq_no: q);
810 octep_enable_oq_cnxk_pf(oct, oq_no: q);
811 }
812}
813
814/* Disable a hardware Tx Queue assined to PF */
815static void octep_disable_iq_cnxk_pf(struct octep_device *oct, int iq_no)
816{
817 u64 reg_val = 0ULL;
818
819 iq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
820
821 reg_val = octep_read_csr64(oct, CNXK_SDP_R_IN_ENABLE(iq_no));
822 reg_val &= ~0x1ULL;
823 octep_write_csr64(oct, CNXK_SDP_R_IN_ENABLE(iq_no), reg_val);
824}
825
826/* Disable a hardware Rx Queue assined to PF */
827static void octep_disable_oq_cnxk_pf(struct octep_device *oct, int oq_no)
828{
829 u64 reg_val = 0ULL;
830
831 oq_no += CFG_GET_PORTS_PF_SRN(oct->conf);
832 reg_val = octep_read_csr64(oct, CNXK_SDP_R_OUT_ENABLE(oq_no));
833 reg_val &= ~0x1ULL;
834 octep_write_csr64(oct, CNXK_SDP_R_OUT_ENABLE(oq_no), reg_val);
835}
836
837/* Disable all hardware Tx/Rx Queues assined to PF */
838static void octep_disable_io_queues_cnxk_pf(struct octep_device *oct)
839{
840 int q = 0;
841
842 for (q = 0; q < CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf); q++) {
843 octep_disable_iq_cnxk_pf(oct, iq_no: q);
844 octep_disable_oq_cnxk_pf(oct, oq_no: q);
845 }
846}
847
848/* Dump hardware registers (including Tx/Rx queues) for debugging. */
849static void octep_dump_registers_cnxk_pf(struct octep_device *oct)
850{
851 u8 srn, num_rings, q;
852
853 srn = CFG_GET_PORTS_PF_SRN(oct->conf);
854 num_rings = CFG_GET_PORTS_ACTIVE_IO_RINGS(oct->conf);
855
856 for (q = srn; q < srn + num_rings; q++)
857 cnxk_dump_regs(oct, qno: q);
858}
859
860/**
861 * octep_device_setup_cnxk_pf() - Setup Octeon device.
862 *
863 * @oct: Octeon device private data structure.
864 *
865 * - initialize hardware operations.
866 * - get target side pcie port number for the device.
867 * - setup window access to hardware registers.
868 * - set initial configuration and max limits.
869 * - setup hardware mapping of rings to the PF device.
870 */
871void octep_device_setup_cnxk_pf(struct octep_device *oct)
872{
873 oct->hw_ops.setup_iq_regs = octep_setup_iq_regs_cnxk_pf;
874 oct->hw_ops.setup_oq_regs = octep_setup_oq_regs_cnxk_pf;
875 oct->hw_ops.setup_mbox_regs = octep_setup_mbox_regs_cnxk_pf;
876
877 oct->hw_ops.mbox_intr_handler = octep_pfvf_mbox_intr_handler_cnxk_pf;
878 oct->hw_ops.oei_intr_handler = octep_oei_intr_handler_cnxk_pf;
879 oct->hw_ops.ire_intr_handler = octep_ire_intr_handler_cnxk_pf;
880 oct->hw_ops.ore_intr_handler = octep_ore_intr_handler_cnxk_pf;
881 oct->hw_ops.vfire_intr_handler = octep_vfire_intr_handler_cnxk_pf;
882 oct->hw_ops.vfore_intr_handler = octep_vfore_intr_handler_cnxk_pf;
883 oct->hw_ops.dma_intr_handler = octep_dma_intr_handler_cnxk_pf;
884 oct->hw_ops.dma_vf_intr_handler = octep_dma_vf_intr_handler_cnxk_pf;
885 oct->hw_ops.pp_vf_intr_handler = octep_pp_vf_intr_handler_cnxk_pf;
886 oct->hw_ops.misc_intr_handler = octep_misc_intr_handler_cnxk_pf;
887 oct->hw_ops.rsvd_intr_handler = octep_rsvd_intr_handler_cnxk_pf;
888 oct->hw_ops.ioq_intr_handler = octep_ioq_intr_handler_cnxk_pf;
889 oct->hw_ops.soft_reset = octep_soft_reset_cnxk_pf;
890 oct->hw_ops.reinit_regs = octep_reinit_regs_cnxk_pf;
891
892 oct->hw_ops.enable_interrupts = octep_enable_interrupts_cnxk_pf;
893 oct->hw_ops.disable_interrupts = octep_disable_interrupts_cnxk_pf;
894 oct->hw_ops.poll_non_ioq_interrupts = octep_poll_non_ioq_interrupts_cnxk_pf;
895
896 oct->hw_ops.update_iq_read_idx = octep_update_iq_read_index_cnxk_pf;
897
898 oct->hw_ops.enable_iq = octep_enable_iq_cnxk_pf;
899 oct->hw_ops.enable_oq = octep_enable_oq_cnxk_pf;
900 oct->hw_ops.enable_io_queues = octep_enable_io_queues_cnxk_pf;
901
902 oct->hw_ops.disable_iq = octep_disable_iq_cnxk_pf;
903 oct->hw_ops.disable_oq = octep_disable_oq_cnxk_pf;
904 oct->hw_ops.disable_io_queues = octep_disable_io_queues_cnxk_pf;
905 oct->hw_ops.reset_io_queues = octep_reset_io_queues_cnxk_pf;
906
907 oct->hw_ops.dump_registers = octep_dump_registers_cnxk_pf;
908
909 octep_setup_pci_window_regs_cnxk_pf(oct);
910
911 oct->pcie_port = octep_read_csr64(oct, CNXK_SDP_MAC_NUMBER) & 0xff;
912 dev_info(&oct->pdev->dev,
913 "Octeon device using PCIE Port %d\n", oct->pcie_port);
914
915 octep_init_config_cnxk_pf(oct);
916 octep_configure_ring_mapping_cnxk_pf(oct);
917
918 /* Firmware status CSR is supposed to be cleared by
919 * core domain reset, but due to IPBUPEM-38842, it is not.
920 * Set it to RUNNING early in boot, so that unexpected resets
921 * leave it in a state that is not READY (1).
922 */
923 OCTEP_PCI_WIN_WRITE(oct, CNXK_PEMX_PFX_CSX_PFCFGX(0, 0, CNXK_PCIEEP_VSECST_CTL),
924 FW_STATUS_RUNNING);
925}
926

source code of linux/drivers/net/ethernet/marvell/octeon_ep/octep_cnxk_pf.c