1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 /* Copyright(c) 2020 Intel Corporation. All rights reserved. */
3 #include <linux/debugfs.h>
4 #include <linux/delay.h>
5 #include <linux/init.h>
6 #include <linux/interrupt.h>
7 #include <linux/module.h>
8 #include <linux/pci.h>
9 #include <linux/random.h>
10 #include <linux/slab.h>
11 #include <linux/ntb.h>
12 #include <linux/log2.h>
13
14 #include "ntb_hw_intel.h"
15 #include "ntb_hw_gen1.h"
16 #include "ntb_hw_gen3.h"
17 #include "ntb_hw_gen4.h"
18
19 static int gen4_poll_link(struct intel_ntb_dev *ndev);
20 static int gen4_link_is_up(struct intel_ntb_dev *ndev);
21
22 static const struct intel_ntb_reg gen4_reg = {
23 .poll_link = gen4_poll_link,
24 .link_is_up = gen4_link_is_up,
25 .db_ioread = gen3_db_ioread,
26 .db_iowrite = gen3_db_iowrite,
27 .db_size = sizeof(u32),
28 .ntb_ctl = GEN4_NTBCNTL_OFFSET,
29 .mw_bar = {2, 4},
30 };
31
32 static const struct intel_ntb_alt_reg gen4_pri_reg = {
33 .db_clear = GEN4_IM_INT_STATUS_OFFSET,
34 .db_mask = GEN4_IM_INT_DISABLE_OFFSET,
35 .spad = GEN4_IM_SPAD_OFFSET,
36 };
37
38 static const struct intel_ntb_xlat_reg gen4_sec_xlat = {
39 .bar2_limit = GEN4_IM23XLMT_OFFSET,
40 .bar2_xlat = GEN4_IM23XBASE_OFFSET,
41 .bar2_idx = GEN4_IM23XBASEIDX_OFFSET,
42 };
43
44 static const struct intel_ntb_alt_reg gen4_b2b_reg = {
45 .db_bell = GEN4_IM_DOORBELL_OFFSET,
46 .spad = GEN4_EM_SPAD_OFFSET,
47 };
48
gen4_poll_link(struct intel_ntb_dev * ndev)49 static int gen4_poll_link(struct intel_ntb_dev *ndev)
50 {
51 u16 reg_val;
52
53 /*
54 * We need to write to DLLSCS bit in the SLOTSTS before we
55 * can clear the hardware link interrupt on ICX NTB.
56 */
57 iowrite16(GEN4_SLOTSTS_DLLSCS, ndev->self_mmio + GEN4_SLOTSTS);
58 ndev->reg->db_iowrite(ndev->db_link_mask,
59 ndev->self_mmio +
60 ndev->self_reg->db_clear);
61
62 reg_val = ioread16(ndev->self_mmio + GEN4_LINK_STATUS_OFFSET);
63 if (reg_val == ndev->lnk_sta)
64 return 0;
65
66 ndev->lnk_sta = reg_val;
67
68 return 1;
69 }
70
gen4_link_is_up(struct intel_ntb_dev * ndev)71 static int gen4_link_is_up(struct intel_ntb_dev *ndev)
72 {
73 return NTB_LNK_STA_ACTIVE(ndev->lnk_sta);
74 }
75
gen4_init_isr(struct intel_ntb_dev * ndev)76 static int gen4_init_isr(struct intel_ntb_dev *ndev)
77 {
78 int i;
79
80 /*
81 * The MSIX vectors and the interrupt status bits are not lined up
82 * on Gen3 (Skylake) and Gen4. By default the link status bit is bit
83 * 32, however it is by default MSIX vector0. We need to fixup to
84 * line them up. The vectors at reset is 1-32,0. We need to reprogram
85 * to 0-32.
86 */
87 for (i = 0; i < GEN4_DB_MSIX_VECTOR_COUNT; i++)
88 iowrite8(i, ndev->self_mmio + GEN4_INTVEC_OFFSET + i);
89
90 return ndev_init_isr(ndev, GEN4_DB_MSIX_VECTOR_COUNT,
91 GEN4_DB_MSIX_VECTOR_COUNT,
92 GEN4_DB_MSIX_VECTOR_SHIFT,
93 GEN4_DB_TOTAL_SHIFT);
94 }
95
gen4_setup_b2b_mw(struct intel_ntb_dev * ndev,const struct intel_b2b_addr * addr,const struct intel_b2b_addr * peer_addr)96 static int gen4_setup_b2b_mw(struct intel_ntb_dev *ndev,
97 const struct intel_b2b_addr *addr,
98 const struct intel_b2b_addr *peer_addr)
99 {
100 struct pci_dev *pdev;
101 void __iomem *mmio;
102 phys_addr_t bar_addr;
103
104 pdev = ndev->ntb.pdev;
105 mmio = ndev->self_mmio;
106
107 /* setup incoming bar limits == base addrs (zero length windows) */
108 bar_addr = addr->bar2_addr64;
109 iowrite64(bar_addr, mmio + GEN4_IM23XLMT_OFFSET);
110 bar_addr = ioread64(mmio + GEN4_IM23XLMT_OFFSET);
111 dev_dbg(&pdev->dev, "IM23XLMT %#018llx\n", bar_addr);
112
113 bar_addr = addr->bar4_addr64;
114 iowrite64(bar_addr, mmio + GEN4_IM45XLMT_OFFSET);
115 bar_addr = ioread64(mmio + GEN4_IM45XLMT_OFFSET);
116 dev_dbg(&pdev->dev, "IM45XLMT %#018llx\n", bar_addr);
117
118 /* zero incoming translation addrs */
119 iowrite64(0, mmio + GEN4_IM23XBASE_OFFSET);
120 iowrite64(0, mmio + GEN4_IM45XBASE_OFFSET);
121
122 ndev->peer_mmio = ndev->self_mmio;
123
124 return 0;
125 }
126
gen4_init_ntb(struct intel_ntb_dev * ndev)127 static int gen4_init_ntb(struct intel_ntb_dev *ndev)
128 {
129 int rc;
130
131
132 ndev->mw_count = XEON_MW_COUNT;
133 ndev->spad_count = GEN4_SPAD_COUNT;
134 ndev->db_count = GEN4_DB_COUNT;
135 ndev->db_link_mask = GEN4_DB_LINK_BIT;
136
137 ndev->self_reg = &gen4_pri_reg;
138 ndev->xlat_reg = &gen4_sec_xlat;
139 ndev->peer_reg = &gen4_b2b_reg;
140
141 if (ndev->ntb.topo == NTB_TOPO_B2B_USD)
142 rc = gen4_setup_b2b_mw(ndev, &xeon_b2b_dsd_addr,
143 &xeon_b2b_usd_addr);
144 else
145 rc = gen4_setup_b2b_mw(ndev, &xeon_b2b_usd_addr,
146 &xeon_b2b_dsd_addr);
147 if (rc)
148 return rc;
149
150 ndev->db_valid_mask = BIT_ULL(ndev->db_count) - 1;
151
152 ndev->reg->db_iowrite(ndev->db_valid_mask,
153 ndev->self_mmio +
154 ndev->self_reg->db_mask);
155
156 return 0;
157 }
158
gen4_ppd_topo(struct intel_ntb_dev * ndev,u32 ppd)159 static enum ntb_topo gen4_ppd_topo(struct intel_ntb_dev *ndev, u32 ppd)
160 {
161 switch (ppd & GEN4_PPD_TOPO_MASK) {
162 case GEN4_PPD_TOPO_B2B_USD:
163 return NTB_TOPO_B2B_USD;
164 case GEN4_PPD_TOPO_B2B_DSD:
165 return NTB_TOPO_B2B_DSD;
166 }
167
168 return NTB_TOPO_NONE;
169 }
170
spr_ppd_topo(struct intel_ntb_dev * ndev,u32 ppd)171 static enum ntb_topo spr_ppd_topo(struct intel_ntb_dev *ndev, u32 ppd)
172 {
173 switch (ppd & SPR_PPD_TOPO_MASK) {
174 case SPR_PPD_TOPO_B2B_USD:
175 return NTB_TOPO_B2B_USD;
176 case SPR_PPD_TOPO_B2B_DSD:
177 return NTB_TOPO_B2B_DSD;
178 }
179
180 return NTB_TOPO_NONE;
181 }
182
gen4_init_dev(struct intel_ntb_dev * ndev)183 int gen4_init_dev(struct intel_ntb_dev *ndev)
184 {
185 struct pci_dev *pdev = ndev->ntb.pdev;
186 u32 ppd1/*, ppd0*/;
187 u16 lnkctl;
188 int rc;
189
190 ndev->reg = &gen4_reg;
191
192 if (pdev_is_ICX(pdev)) {
193 ndev->hwerr_flags |= NTB_HWERR_BAR_ALIGN;
194 ndev->hwerr_flags |= NTB_HWERR_LTR_BAD;
195 }
196
197 ppd1 = ioread32(ndev->self_mmio + GEN4_PPD1_OFFSET);
198 if (pdev_is_ICX(pdev))
199 ndev->ntb.topo = gen4_ppd_topo(ndev, ppd1);
200 else if (pdev_is_SPR(pdev) || pdev_is_gen5(pdev))
201 ndev->ntb.topo = spr_ppd_topo(ndev, ppd1);
202 dev_dbg(&pdev->dev, "ppd %#x topo %s\n", ppd1,
203 ntb_topo_string(ndev->ntb.topo));
204 if (ndev->ntb.topo == NTB_TOPO_NONE)
205 return -EINVAL;
206
207 rc = gen4_init_ntb(ndev);
208 if (rc)
209 return rc;
210
211 /* init link setup */
212 lnkctl = ioread16(ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
213 lnkctl |= GEN4_LINK_CTRL_LINK_DISABLE;
214 iowrite16(lnkctl, ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
215
216 return gen4_init_isr(ndev);
217 }
218
ndev_ntb4_debugfs_read(struct file * filp,char __user * ubuf,size_t count,loff_t * offp)219 ssize_t ndev_ntb4_debugfs_read(struct file *filp, char __user *ubuf,
220 size_t count, loff_t *offp)
221 {
222 struct intel_ntb_dev *ndev;
223 void __iomem *mmio;
224 char *buf;
225 size_t buf_size;
226 ssize_t ret, off;
227 union { u64 v64; u32 v32; u16 v16; } u;
228
229 ndev = filp->private_data;
230 mmio = ndev->self_mmio;
231
232 buf_size = min(count, 0x800ul);
233
234 buf = kmalloc(buf_size, GFP_KERNEL);
235 if (!buf)
236 return -ENOMEM;
237
238 off = 0;
239
240 off += scnprintf(buf + off, buf_size - off,
241 "NTB Device Information:\n");
242
243 off += scnprintf(buf + off, buf_size - off,
244 "Connection Topology -\t%s\n",
245 ntb_topo_string(ndev->ntb.topo));
246
247 off += scnprintf(buf + off, buf_size - off,
248 "NTB CTL -\t\t%#06x\n", ndev->ntb_ctl);
249 off += scnprintf(buf + off, buf_size - off,
250 "LNK STA (cached) -\t\t%#06x\n", ndev->lnk_sta);
251
252 if (!ndev->reg->link_is_up(ndev))
253 off += scnprintf(buf + off, buf_size - off,
254 "Link Status -\t\tDown\n");
255 else {
256 off += scnprintf(buf + off, buf_size - off,
257 "Link Status -\t\tUp\n");
258 off += scnprintf(buf + off, buf_size - off,
259 "Link Speed -\t\tPCI-E Gen %u\n",
260 NTB_LNK_STA_SPEED(ndev->lnk_sta));
261 off += scnprintf(buf + off, buf_size - off,
262 "Link Width -\t\tx%u\n",
263 NTB_LNK_STA_WIDTH(ndev->lnk_sta));
264 }
265
266 off += scnprintf(buf + off, buf_size - off,
267 "Memory Window Count -\t%u\n", ndev->mw_count);
268 off += scnprintf(buf + off, buf_size - off,
269 "Scratchpad Count -\t%u\n", ndev->spad_count);
270 off += scnprintf(buf + off, buf_size - off,
271 "Doorbell Count -\t%u\n", ndev->db_count);
272 off += scnprintf(buf + off, buf_size - off,
273 "Doorbell Vector Count -\t%u\n", ndev->db_vec_count);
274 off += scnprintf(buf + off, buf_size - off,
275 "Doorbell Vector Shift -\t%u\n", ndev->db_vec_shift);
276
277 off += scnprintf(buf + off, buf_size - off,
278 "Doorbell Valid Mask -\t%#llx\n", ndev->db_valid_mask);
279 off += scnprintf(buf + off, buf_size - off,
280 "Doorbell Link Mask -\t%#llx\n", ndev->db_link_mask);
281 off += scnprintf(buf + off, buf_size - off,
282 "Doorbell Mask Cached -\t%#llx\n", ndev->db_mask);
283
284 u.v64 = ndev_db_read(ndev, mmio + ndev->self_reg->db_mask);
285 off += scnprintf(buf + off, buf_size - off,
286 "Doorbell Mask -\t\t%#llx\n", u.v64);
287
288 off += scnprintf(buf + off, buf_size - off,
289 "\nNTB Incoming XLAT:\n");
290
291 u.v64 = ioread64(mmio + GEN4_IM23XBASE_OFFSET);
292 off += scnprintf(buf + off, buf_size - off,
293 "IM23XBASE -\t\t%#018llx\n", u.v64);
294
295 u.v64 = ioread64(mmio + GEN4_IM45XBASE_OFFSET);
296 off += scnprintf(buf + off, buf_size - off,
297 "IM45XBASE -\t\t%#018llx\n", u.v64);
298
299 u.v64 = ioread64(mmio + GEN4_IM23XLMT_OFFSET);
300 off += scnprintf(buf + off, buf_size - off,
301 "IM23XLMT -\t\t\t%#018llx\n", u.v64);
302
303 u.v64 = ioread64(mmio + GEN4_IM45XLMT_OFFSET);
304 off += scnprintf(buf + off, buf_size - off,
305 "IM45XLMT -\t\t\t%#018llx\n", u.v64);
306
307 off += scnprintf(buf + off, buf_size - off,
308 "\nNTB Statistics:\n");
309
310 off += scnprintf(buf + off, buf_size - off,
311 "\nNTB Hardware Errors:\n");
312
313 if (!pci_read_config_word(ndev->ntb.pdev,
314 GEN4_DEVSTS_OFFSET, &u.v16))
315 off += scnprintf(buf + off, buf_size - off,
316 "DEVSTS -\t\t%#06x\n", u.v16);
317
318 u.v16 = ioread16(mmio + GEN4_LINK_STATUS_OFFSET);
319 off += scnprintf(buf + off, buf_size - off,
320 "LNKSTS -\t\t%#06x\n", u.v16);
321
322 if (!pci_read_config_dword(ndev->ntb.pdev,
323 GEN4_UNCERRSTS_OFFSET, &u.v32))
324 off += scnprintf(buf + off, buf_size - off,
325 "UNCERRSTS -\t\t%#06x\n", u.v32);
326
327 if (!pci_read_config_dword(ndev->ntb.pdev,
328 GEN4_CORERRSTS_OFFSET, &u.v32))
329 off += scnprintf(buf + off, buf_size - off,
330 "CORERRSTS -\t\t%#06x\n", u.v32);
331
332 ret = simple_read_from_buffer(ubuf, count, offp, buf, off);
333 kfree(buf);
334 return ret;
335 }
336
intel_ntb4_mw_set_trans(struct ntb_dev * ntb,int pidx,int idx,dma_addr_t addr,resource_size_t size)337 static int intel_ntb4_mw_set_trans(struct ntb_dev *ntb, int pidx, int idx,
338 dma_addr_t addr, resource_size_t size)
339 {
340 struct intel_ntb_dev *ndev = ntb_ndev(ntb);
341 unsigned long xlat_reg, limit_reg, idx_reg;
342 unsigned short base_idx, reg_val16;
343 resource_size_t bar_size, mw_size;
344 void __iomem *mmio;
345 u64 base, limit, reg_val;
346 int bar;
347
348 if (pidx != NTB_DEF_PEER_IDX)
349 return -EINVAL;
350
351 if (idx >= ndev->b2b_idx && !ndev->b2b_off)
352 idx += 1;
353
354 bar = ndev_mw_to_bar(ndev, idx);
355 if (bar < 0)
356 return bar;
357
358 bar_size = pci_resource_len(ndev->ntb.pdev, bar);
359
360 if (idx == ndev->b2b_idx)
361 mw_size = bar_size - ndev->b2b_off;
362 else
363 mw_size = bar_size;
364
365 if (ndev->hwerr_flags & NTB_HWERR_BAR_ALIGN) {
366 /* hardware requires that addr is aligned to bar size */
367 if (addr & (bar_size - 1))
368 return -EINVAL;
369 } else {
370 if (addr & (PAGE_SIZE - 1))
371 return -EINVAL;
372 }
373
374 /* make sure the range fits in the usable mw size */
375 if (size > mw_size)
376 return -EINVAL;
377
378 mmio = ndev->self_mmio;
379 xlat_reg = ndev->xlat_reg->bar2_xlat + (idx * 0x10);
380 limit_reg = ndev->xlat_reg->bar2_limit + (idx * 0x10);
381 base = pci_resource_start(ndev->ntb.pdev, bar);
382
383 /* Set the limit if supported, if size is not mw_size */
384 if (limit_reg && size != mw_size) {
385 limit = base + size;
386 base_idx = __ilog2_u64(size);
387 } else {
388 limit = base + mw_size;
389 base_idx = __ilog2_u64(mw_size);
390 }
391
392
393 /* set and verify setting the translation address */
394 iowrite64(addr, mmio + xlat_reg);
395 reg_val = ioread64(mmio + xlat_reg);
396 if (reg_val != addr) {
397 iowrite64(0, mmio + xlat_reg);
398 return -EIO;
399 }
400
401 dev_dbg(&ntb->pdev->dev, "BAR %d IMXBASE: %#Lx\n", bar, reg_val);
402
403 /* set and verify setting the limit */
404 iowrite64(limit, mmio + limit_reg);
405 reg_val = ioread64(mmio + limit_reg);
406 if (reg_val != limit) {
407 iowrite64(base, mmio + limit_reg);
408 iowrite64(0, mmio + xlat_reg);
409 return -EIO;
410 }
411
412 dev_dbg(&ntb->pdev->dev, "BAR %d IMXLMT: %#Lx\n", bar, reg_val);
413
414 if (ndev->hwerr_flags & NTB_HWERR_BAR_ALIGN) {
415 idx_reg = ndev->xlat_reg->bar2_idx + (idx * 0x2);
416 iowrite16(base_idx, mmio + idx_reg);
417 reg_val16 = ioread16(mmio + idx_reg);
418 if (reg_val16 != base_idx) {
419 iowrite64(base, mmio + limit_reg);
420 iowrite64(0, mmio + xlat_reg);
421 iowrite16(0, mmio + idx_reg);
422 return -EIO;
423 }
424 dev_dbg(&ntb->pdev->dev, "BAR %d IMBASEIDX: %#x\n", bar, reg_val16);
425 }
426
427
428 return 0;
429 }
430
intel_ntb4_link_enable(struct ntb_dev * ntb,enum ntb_speed max_speed,enum ntb_width max_width)431 static int intel_ntb4_link_enable(struct ntb_dev *ntb,
432 enum ntb_speed max_speed, enum ntb_width max_width)
433 {
434 struct intel_ntb_dev *ndev;
435 u32 ntb_ctl, ppd0;
436 u16 lnkctl;
437
438 ndev = container_of(ntb, struct intel_ntb_dev, ntb);
439
440 dev_dbg(&ntb->pdev->dev,
441 "Enabling link with max_speed %d max_width %d\n",
442 max_speed, max_width);
443
444 if (max_speed != NTB_SPEED_AUTO)
445 dev_dbg(&ntb->pdev->dev,
446 "ignoring max_speed %d\n", max_speed);
447 if (max_width != NTB_WIDTH_AUTO)
448 dev_dbg(&ntb->pdev->dev,
449 "ignoring max_width %d\n", max_width);
450
451 if (!(ndev->hwerr_flags & NTB_HWERR_LTR_BAD)) {
452 u32 ltr;
453
454 /* Setup active snoop LTR values */
455 ltr = NTB_LTR_ACTIVE_REQMNT | NTB_LTR_ACTIVE_VAL | NTB_LTR_ACTIVE_LATSCALE;
456 /* Setup active non-snoop values */
457 ltr = (ltr << NTB_LTR_NS_SHIFT) | ltr;
458 iowrite32(ltr, ndev->self_mmio + GEN4_LTR_ACTIVE_OFFSET);
459
460 /* Setup idle snoop LTR values */
461 ltr = NTB_LTR_IDLE_VAL | NTB_LTR_IDLE_LATSCALE | NTB_LTR_IDLE_REQMNT;
462 /* Setup idle non-snoop values */
463 ltr = (ltr << NTB_LTR_NS_SHIFT) | ltr;
464 iowrite32(ltr, ndev->self_mmio + GEN4_LTR_IDLE_OFFSET);
465
466 /* setup PCIe LTR to active */
467 iowrite8(NTB_LTR_SWSEL_ACTIVE, ndev->self_mmio + GEN4_LTR_SWSEL_OFFSET);
468 }
469
470 ntb_ctl = NTB_CTL_E2I_BAR23_SNOOP | NTB_CTL_I2E_BAR23_SNOOP;
471 ntb_ctl |= NTB_CTL_E2I_BAR45_SNOOP | NTB_CTL_I2E_BAR45_SNOOP;
472 iowrite32(ntb_ctl, ndev->self_mmio + ndev->reg->ntb_ctl);
473
474 lnkctl = ioread16(ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
475 lnkctl &= ~GEN4_LINK_CTRL_LINK_DISABLE;
476 iowrite16(lnkctl, ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
477
478 /* start link training in PPD0 */
479 ppd0 = ioread32(ndev->self_mmio + GEN4_PPD0_OFFSET);
480 ppd0 |= GEN4_PPD_LINKTRN;
481 iowrite32(ppd0, ndev->self_mmio + GEN4_PPD0_OFFSET);
482
483 /* make sure link training has started */
484 ppd0 = ioread32(ndev->self_mmio + GEN4_PPD0_OFFSET);
485 if (!(ppd0 & GEN4_PPD_LINKTRN)) {
486 dev_warn(&ntb->pdev->dev, "Link is not training\n");
487 return -ENXIO;
488 }
489
490 ndev->dev_up = 1;
491
492 return 0;
493 }
494
intel_ntb4_link_disable(struct ntb_dev * ntb)495 static int intel_ntb4_link_disable(struct ntb_dev *ntb)
496 {
497 struct intel_ntb_dev *ndev;
498 u32 ntb_cntl;
499 u16 lnkctl;
500
501 ndev = container_of(ntb, struct intel_ntb_dev, ntb);
502
503 dev_dbg(&ntb->pdev->dev, "Disabling link\n");
504
505 /* clear the snoop bits */
506 ntb_cntl = ioread32(ndev->self_mmio + ndev->reg->ntb_ctl);
507 ntb_cntl &= ~(NTB_CTL_E2I_BAR23_SNOOP | NTB_CTL_I2E_BAR23_SNOOP);
508 ntb_cntl &= ~(NTB_CTL_E2I_BAR45_SNOOP | NTB_CTL_I2E_BAR45_SNOOP);
509 iowrite32(ntb_cntl, ndev->self_mmio + ndev->reg->ntb_ctl);
510
511 lnkctl = ioread16(ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
512 lnkctl |= GEN4_LINK_CTRL_LINK_DISABLE;
513 iowrite16(lnkctl, ndev->self_mmio + GEN4_LINK_CTRL_OFFSET);
514
515 /* set LTR to idle */
516 if (!(ndev->hwerr_flags & NTB_HWERR_LTR_BAD))
517 iowrite8(NTB_LTR_SWSEL_IDLE, ndev->self_mmio + GEN4_LTR_SWSEL_OFFSET);
518
519 ndev->dev_up = 0;
520
521 return 0;
522 }
523
intel_ntb4_mw_get_align(struct ntb_dev * ntb,int pidx,int idx,resource_size_t * addr_align,resource_size_t * size_align,resource_size_t * size_max)524 static int intel_ntb4_mw_get_align(struct ntb_dev *ntb, int pidx, int idx,
525 resource_size_t *addr_align,
526 resource_size_t *size_align,
527 resource_size_t *size_max)
528 {
529 struct intel_ntb_dev *ndev = ntb_ndev(ntb);
530 resource_size_t bar_size, mw_size;
531 int bar;
532
533 if (pidx != NTB_DEF_PEER_IDX)
534 return -EINVAL;
535
536 if (idx >= ndev->b2b_idx && !ndev->b2b_off)
537 idx += 1;
538
539 bar = ndev_mw_to_bar(ndev, idx);
540 if (bar < 0)
541 return bar;
542
543 bar_size = pci_resource_len(ndev->ntb.pdev, bar);
544
545 if (idx == ndev->b2b_idx)
546 mw_size = bar_size - ndev->b2b_off;
547 else
548 mw_size = bar_size;
549
550 if (addr_align) {
551 if (ndev->hwerr_flags & NTB_HWERR_BAR_ALIGN)
552 *addr_align = pci_resource_len(ndev->ntb.pdev, bar);
553 else
554 *addr_align = PAGE_SIZE;
555 }
556
557 if (size_align)
558 *size_align = 1;
559
560 if (size_max)
561 *size_max = mw_size;
562
563 return 0;
564 }
565
566 const struct ntb_dev_ops intel_ntb4_ops = {
567 .mw_count = intel_ntb_mw_count,
568 .mw_get_align = intel_ntb4_mw_get_align,
569 .mw_set_trans = intel_ntb4_mw_set_trans,
570 .peer_mw_count = intel_ntb_peer_mw_count,
571 .peer_mw_get_addr = intel_ntb_peer_mw_get_addr,
572 .link_is_up = intel_ntb_link_is_up,
573 .link_enable = intel_ntb4_link_enable,
574 .link_disable = intel_ntb4_link_disable,
575 .db_valid_mask = intel_ntb_db_valid_mask,
576 .db_vector_count = intel_ntb_db_vector_count,
577 .db_vector_mask = intel_ntb_db_vector_mask,
578 .db_read = intel_ntb3_db_read,
579 .db_clear = intel_ntb3_db_clear,
580 .db_set_mask = intel_ntb_db_set_mask,
581 .db_clear_mask = intel_ntb_db_clear_mask,
582 .peer_db_addr = intel_ntb3_peer_db_addr,
583 .peer_db_set = intel_ntb3_peer_db_set,
584 .spad_is_unsafe = intel_ntb_spad_is_unsafe,
585 .spad_count = intel_ntb_spad_count,
586 .spad_read = intel_ntb_spad_read,
587 .spad_write = intel_ntb_spad_write,
588 .peer_spad_addr = intel_ntb_peer_spad_addr,
589 .peer_spad_read = intel_ntb_peer_spad_read,
590 .peer_spad_write = intel_ntb_peer_spad_write,
591 };
592
593
