Loading...
Note: File does not exist in v3.1.
1// SPDX-License-Identifier: GPL-2.0
2/**
3 * Synopsys DesignWare PCIe Endpoint controller driver
4 *
5 * Copyright (C) 2017 Texas Instruments
6 * Author: Kishon Vijay Abraham I <kishon@ti.com>
7 */
8
9#include <linux/of.h>
10
11#include "pcie-designware.h"
12#include <linux/pci-epc.h>
13#include <linux/pci-epf.h>
14
15void dw_pcie_ep_linkup(struct dw_pcie_ep *ep)
16{
17 struct pci_epc *epc = ep->epc;
18
19 pci_epc_linkup(epc);
20}
21
22static void __dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar,
23 int flags)
24{
25 u32 reg;
26
27 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
28 dw_pcie_dbi_ro_wr_en(pci);
29 dw_pcie_writel_dbi2(pci, reg, 0x0);
30 dw_pcie_writel_dbi(pci, reg, 0x0);
31 if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
32 dw_pcie_writel_dbi2(pci, reg + 4, 0x0);
33 dw_pcie_writel_dbi(pci, reg + 4, 0x0);
34 }
35 dw_pcie_dbi_ro_wr_dis(pci);
36}
37
38void dw_pcie_ep_reset_bar(struct dw_pcie *pci, enum pci_barno bar)
39{
40 __dw_pcie_ep_reset_bar(pci, bar, 0);
41}
42
43static int dw_pcie_ep_write_header(struct pci_epc *epc, u8 func_no,
44 struct pci_epf_header *hdr)
45{
46 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
47 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
48
49 dw_pcie_dbi_ro_wr_en(pci);
50 dw_pcie_writew_dbi(pci, PCI_VENDOR_ID, hdr->vendorid);
51 dw_pcie_writew_dbi(pci, PCI_DEVICE_ID, hdr->deviceid);
52 dw_pcie_writeb_dbi(pci, PCI_REVISION_ID, hdr->revid);
53 dw_pcie_writeb_dbi(pci, PCI_CLASS_PROG, hdr->progif_code);
54 dw_pcie_writew_dbi(pci, PCI_CLASS_DEVICE,
55 hdr->subclass_code | hdr->baseclass_code << 8);
56 dw_pcie_writeb_dbi(pci, PCI_CACHE_LINE_SIZE,
57 hdr->cache_line_size);
58 dw_pcie_writew_dbi(pci, PCI_SUBSYSTEM_VENDOR_ID,
59 hdr->subsys_vendor_id);
60 dw_pcie_writew_dbi(pci, PCI_SUBSYSTEM_ID, hdr->subsys_id);
61 dw_pcie_writeb_dbi(pci, PCI_INTERRUPT_PIN,
62 hdr->interrupt_pin);
63 dw_pcie_dbi_ro_wr_dis(pci);
64
65 return 0;
66}
67
68static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, enum pci_barno bar,
69 dma_addr_t cpu_addr,
70 enum dw_pcie_as_type as_type)
71{
72 int ret;
73 u32 free_win;
74 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
75
76 free_win = find_first_zero_bit(ep->ib_window_map, ep->num_ib_windows);
77 if (free_win >= ep->num_ib_windows) {
78 dev_err(pci->dev, "No free inbound window\n");
79 return -EINVAL;
80 }
81
82 ret = dw_pcie_prog_inbound_atu(pci, free_win, bar, cpu_addr,
83 as_type);
84 if (ret < 0) {
85 dev_err(pci->dev, "Failed to program IB window\n");
86 return ret;
87 }
88
89 ep->bar_to_atu[bar] = free_win;
90 set_bit(free_win, ep->ib_window_map);
91
92 return 0;
93}
94
95static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, phys_addr_t phys_addr,
96 u64 pci_addr, size_t size)
97{
98 u32 free_win;
99 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
100
101 free_win = find_first_zero_bit(ep->ob_window_map, ep->num_ob_windows);
102 if (free_win >= ep->num_ob_windows) {
103 dev_err(pci->dev, "No free outbound window\n");
104 return -EINVAL;
105 }
106
107 dw_pcie_prog_outbound_atu(pci, free_win, PCIE_ATU_TYPE_MEM,
108 phys_addr, pci_addr, size);
109
110 set_bit(free_win, ep->ob_window_map);
111 ep->outbound_addr[free_win] = phys_addr;
112
113 return 0;
114}
115
116static void dw_pcie_ep_clear_bar(struct pci_epc *epc, u8 func_no,
117 struct pci_epf_bar *epf_bar)
118{
119 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
120 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
121 enum pci_barno bar = epf_bar->barno;
122 u32 atu_index = ep->bar_to_atu[bar];
123
124 __dw_pcie_ep_reset_bar(pci, bar, epf_bar->flags);
125
126 dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_INBOUND);
127 clear_bit(atu_index, ep->ib_window_map);
128}
129
130static int dw_pcie_ep_set_bar(struct pci_epc *epc, u8 func_no,
131 struct pci_epf_bar *epf_bar)
132{
133 int ret;
134 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
135 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
136 enum pci_barno bar = epf_bar->barno;
137 size_t size = epf_bar->size;
138 int flags = epf_bar->flags;
139 enum dw_pcie_as_type as_type;
140 u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
141
142 if (!(flags & PCI_BASE_ADDRESS_SPACE))
143 as_type = DW_PCIE_AS_MEM;
144 else
145 as_type = DW_PCIE_AS_IO;
146
147 ret = dw_pcie_ep_inbound_atu(ep, bar, epf_bar->phys_addr, as_type);
148 if (ret)
149 return ret;
150
151 dw_pcie_dbi_ro_wr_en(pci);
152
153 dw_pcie_writel_dbi2(pci, reg, lower_32_bits(size - 1));
154 dw_pcie_writel_dbi(pci, reg, flags);
155
156 if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
157 dw_pcie_writel_dbi2(pci, reg + 4, upper_32_bits(size - 1));
158 dw_pcie_writel_dbi(pci, reg + 4, 0);
159 }
160
161 dw_pcie_dbi_ro_wr_dis(pci);
162
163 return 0;
164}
165
166static int dw_pcie_find_index(struct dw_pcie_ep *ep, phys_addr_t addr,
167 u32 *atu_index)
168{
169 u32 index;
170
171 for (index = 0; index < ep->num_ob_windows; index++) {
172 if (ep->outbound_addr[index] != addr)
173 continue;
174 *atu_index = index;
175 return 0;
176 }
177
178 return -EINVAL;
179}
180
181static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no,
182 phys_addr_t addr)
183{
184 int ret;
185 u32 atu_index;
186 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
187 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
188
189 ret = dw_pcie_find_index(ep, addr, &atu_index);
190 if (ret < 0)
191 return;
192
193 dw_pcie_disable_atu(pci, atu_index, DW_PCIE_REGION_OUTBOUND);
194 clear_bit(atu_index, ep->ob_window_map);
195}
196
197static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no,
198 phys_addr_t addr,
199 u64 pci_addr, size_t size)
200{
201 int ret;
202 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
203 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
204
205 ret = dw_pcie_ep_outbound_atu(ep, addr, pci_addr, size);
206 if (ret) {
207 dev_err(pci->dev, "Failed to enable address\n");
208 return ret;
209 }
210
211 return 0;
212}
213
214static int dw_pcie_ep_get_msi(struct pci_epc *epc, u8 func_no)
215{
216 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
217 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
218 u32 val, reg;
219
220 if (!ep->msi_cap)
221 return -EINVAL;
222
223 reg = ep->msi_cap + PCI_MSI_FLAGS;
224 val = dw_pcie_readw_dbi(pci, reg);
225 if (!(val & PCI_MSI_FLAGS_ENABLE))
226 return -EINVAL;
227
228 val = (val & PCI_MSI_FLAGS_QSIZE) >> 4;
229
230 return val;
231}
232
233static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 func_no, u8 interrupts)
234{
235 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
236 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
237 u32 val, reg;
238
239 if (!ep->msi_cap)
240 return -EINVAL;
241
242 reg = ep->msi_cap + PCI_MSI_FLAGS;
243 val = dw_pcie_readw_dbi(pci, reg);
244 val &= ~PCI_MSI_FLAGS_QMASK;
245 val |= (interrupts << 1) & PCI_MSI_FLAGS_QMASK;
246 dw_pcie_dbi_ro_wr_en(pci);
247 dw_pcie_writew_dbi(pci, reg, val);
248 dw_pcie_dbi_ro_wr_dis(pci);
249
250 return 0;
251}
252
253static int dw_pcie_ep_get_msix(struct pci_epc *epc, u8 func_no)
254{
255 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
256 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
257 u32 val, reg;
258
259 if (!ep->msix_cap)
260 return -EINVAL;
261
262 reg = ep->msix_cap + PCI_MSIX_FLAGS;
263 val = dw_pcie_readw_dbi(pci, reg);
264 if (!(val & PCI_MSIX_FLAGS_ENABLE))
265 return -EINVAL;
266
267 val &= PCI_MSIX_FLAGS_QSIZE;
268
269 return val;
270}
271
272static int dw_pcie_ep_set_msix(struct pci_epc *epc, u8 func_no, u16 interrupts)
273{
274 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
275 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
276 u32 val, reg;
277
278 if (!ep->msix_cap)
279 return -EINVAL;
280
281 reg = ep->msix_cap + PCI_MSIX_FLAGS;
282 val = dw_pcie_readw_dbi(pci, reg);
283 val &= ~PCI_MSIX_FLAGS_QSIZE;
284 val |= interrupts;
285 dw_pcie_dbi_ro_wr_en(pci);
286 dw_pcie_writew_dbi(pci, reg, val);
287 dw_pcie_dbi_ro_wr_dis(pci);
288
289 return 0;
290}
291
292static int dw_pcie_ep_raise_irq(struct pci_epc *epc, u8 func_no,
293 enum pci_epc_irq_type type, u16 interrupt_num)
294{
295 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
296
297 if (!ep->ops->raise_irq)
298 return -EINVAL;
299
300 return ep->ops->raise_irq(ep, func_no, type, interrupt_num);
301}
302
303static void dw_pcie_ep_stop(struct pci_epc *epc)
304{
305 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
306 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
307
308 if (!pci->ops->stop_link)
309 return;
310
311 pci->ops->stop_link(pci);
312}
313
314static int dw_pcie_ep_start(struct pci_epc *epc)
315{
316 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
317 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
318
319 if (!pci->ops->start_link)
320 return -EINVAL;
321
322 return pci->ops->start_link(pci);
323}
324
325static const struct pci_epc_features*
326dw_pcie_ep_get_features(struct pci_epc *epc, u8 func_no)
327{
328 struct dw_pcie_ep *ep = epc_get_drvdata(epc);
329
330 if (!ep->ops->get_features)
331 return NULL;
332
333 return ep->ops->get_features(ep);
334}
335
336static const struct pci_epc_ops epc_ops = {
337 .write_header = dw_pcie_ep_write_header,
338 .set_bar = dw_pcie_ep_set_bar,
339 .clear_bar = dw_pcie_ep_clear_bar,
340 .map_addr = dw_pcie_ep_map_addr,
341 .unmap_addr = dw_pcie_ep_unmap_addr,
342 .set_msi = dw_pcie_ep_set_msi,
343 .get_msi = dw_pcie_ep_get_msi,
344 .set_msix = dw_pcie_ep_set_msix,
345 .get_msix = dw_pcie_ep_get_msix,
346 .raise_irq = dw_pcie_ep_raise_irq,
347 .start = dw_pcie_ep_start,
348 .stop = dw_pcie_ep_stop,
349 .get_features = dw_pcie_ep_get_features,
350};
351
352int dw_pcie_ep_raise_legacy_irq(struct dw_pcie_ep *ep, u8 func_no)
353{
354 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
355 struct device *dev = pci->dev;
356
357 dev_err(dev, "EP cannot trigger legacy IRQs\n");
358
359 return -EINVAL;
360}
361
362int dw_pcie_ep_raise_msi_irq(struct dw_pcie_ep *ep, u8 func_no,
363 u8 interrupt_num)
364{
365 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
366 struct pci_epc *epc = ep->epc;
367 unsigned int aligned_offset;
368 u16 msg_ctrl, msg_data;
369 u32 msg_addr_lower, msg_addr_upper, reg;
370 u64 msg_addr;
371 bool has_upper;
372 int ret;
373
374 if (!ep->msi_cap)
375 return -EINVAL;
376
377 /* Raise MSI per the PCI Local Bus Specification Revision 3.0, 6.8.1. */
378 reg = ep->msi_cap + PCI_MSI_FLAGS;
379 msg_ctrl = dw_pcie_readw_dbi(pci, reg);
380 has_upper = !!(msg_ctrl & PCI_MSI_FLAGS_64BIT);
381 reg = ep->msi_cap + PCI_MSI_ADDRESS_LO;
382 msg_addr_lower = dw_pcie_readl_dbi(pci, reg);
383 if (has_upper) {
384 reg = ep->msi_cap + PCI_MSI_ADDRESS_HI;
385 msg_addr_upper = dw_pcie_readl_dbi(pci, reg);
386 reg = ep->msi_cap + PCI_MSI_DATA_64;
387 msg_data = dw_pcie_readw_dbi(pci, reg);
388 } else {
389 msg_addr_upper = 0;
390 reg = ep->msi_cap + PCI_MSI_DATA_32;
391 msg_data = dw_pcie_readw_dbi(pci, reg);
392 }
393 aligned_offset = msg_addr_lower & (epc->mem->page_size - 1);
394 msg_addr = ((u64)msg_addr_upper) << 32 |
395 (msg_addr_lower & ~aligned_offset);
396 ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
397 epc->mem->page_size);
398 if (ret)
399 return ret;
400
401 writel(msg_data | (interrupt_num - 1), ep->msi_mem + aligned_offset);
402
403 dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
404
405 return 0;
406}
407
408int dw_pcie_ep_raise_msix_irq(struct dw_pcie_ep *ep, u8 func_no,
409 u16 interrupt_num)
410{
411 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
412 struct pci_epc *epc = ep->epc;
413 u16 tbl_offset, bir;
414 u32 bar_addr_upper, bar_addr_lower;
415 u32 msg_addr_upper, msg_addr_lower;
416 u32 reg, msg_data, vec_ctrl;
417 u64 tbl_addr, msg_addr, reg_u64;
418 void __iomem *msix_tbl;
419 int ret;
420
421 reg = ep->msix_cap + PCI_MSIX_TABLE;
422 tbl_offset = dw_pcie_readl_dbi(pci, reg);
423 bir = (tbl_offset & PCI_MSIX_TABLE_BIR);
424 tbl_offset &= PCI_MSIX_TABLE_OFFSET;
425
426 reg = PCI_BASE_ADDRESS_0 + (4 * bir);
427 bar_addr_upper = 0;
428 bar_addr_lower = dw_pcie_readl_dbi(pci, reg);
429 reg_u64 = (bar_addr_lower & PCI_BASE_ADDRESS_MEM_TYPE_MASK);
430 if (reg_u64 == PCI_BASE_ADDRESS_MEM_TYPE_64)
431 bar_addr_upper = dw_pcie_readl_dbi(pci, reg + 4);
432
433 tbl_addr = ((u64) bar_addr_upper) << 32 | bar_addr_lower;
434 tbl_addr += (tbl_offset + ((interrupt_num - 1) * PCI_MSIX_ENTRY_SIZE));
435 tbl_addr &= PCI_BASE_ADDRESS_MEM_MASK;
436
437 msix_tbl = ioremap_nocache(ep->phys_base + tbl_addr,
438 PCI_MSIX_ENTRY_SIZE);
439 if (!msix_tbl)
440 return -EINVAL;
441
442 msg_addr_lower = readl(msix_tbl + PCI_MSIX_ENTRY_LOWER_ADDR);
443 msg_addr_upper = readl(msix_tbl + PCI_MSIX_ENTRY_UPPER_ADDR);
444 msg_addr = ((u64) msg_addr_upper) << 32 | msg_addr_lower;
445 msg_data = readl(msix_tbl + PCI_MSIX_ENTRY_DATA);
446 vec_ctrl = readl(msix_tbl + PCI_MSIX_ENTRY_VECTOR_CTRL);
447
448 iounmap(msix_tbl);
449
450 if (vec_ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT) {
451 dev_dbg(pci->dev, "MSI-X entry ctrl set\n");
452 return -EPERM;
453 }
454
455 ret = dw_pcie_ep_map_addr(epc, func_no, ep->msi_mem_phys, msg_addr,
456 epc->mem->page_size);
457 if (ret)
458 return ret;
459
460 writel(msg_data, ep->msi_mem);
461
462 dw_pcie_ep_unmap_addr(epc, func_no, ep->msi_mem_phys);
463
464 return 0;
465}
466
467void dw_pcie_ep_exit(struct dw_pcie_ep *ep)
468{
469 struct pci_epc *epc = ep->epc;
470
471 pci_epc_mem_free_addr(epc, ep->msi_mem_phys, ep->msi_mem,
472 epc->mem->page_size);
473
474 pci_epc_mem_exit(epc);
475}
476
477static unsigned int dw_pcie_ep_find_ext_capability(struct dw_pcie *pci, int cap)
478{
479 u32 header;
480 int pos = PCI_CFG_SPACE_SIZE;
481
482 while (pos) {
483 header = dw_pcie_readl_dbi(pci, pos);
484 if (PCI_EXT_CAP_ID(header) == cap)
485 return pos;
486
487 pos = PCI_EXT_CAP_NEXT(header);
488 if (!pos)
489 break;
490 }
491
492 return 0;
493}
494
495int dw_pcie_ep_init(struct dw_pcie_ep *ep)
496{
497 int i;
498 int ret;
499 u32 reg;
500 void *addr;
501 u8 hdr_type;
502 unsigned int nbars;
503 unsigned int offset;
504 struct pci_epc *epc;
505 struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
506 struct device *dev = pci->dev;
507 struct device_node *np = dev->of_node;
508
509 if (!pci->dbi_base || !pci->dbi_base2) {
510 dev_err(dev, "dbi_base/dbi_base2 is not populated\n");
511 return -EINVAL;
512 }
513
514 ret = of_property_read_u32(np, "num-ib-windows", &ep->num_ib_windows);
515 if (ret < 0) {
516 dev_err(dev, "Unable to read *num-ib-windows* property\n");
517 return ret;
518 }
519 if (ep->num_ib_windows > MAX_IATU_IN) {
520 dev_err(dev, "Invalid *num-ib-windows*\n");
521 return -EINVAL;
522 }
523
524 ret = of_property_read_u32(np, "num-ob-windows", &ep->num_ob_windows);
525 if (ret < 0) {
526 dev_err(dev, "Unable to read *num-ob-windows* property\n");
527 return ret;
528 }
529 if (ep->num_ob_windows > MAX_IATU_OUT) {
530 dev_err(dev, "Invalid *num-ob-windows*\n");
531 return -EINVAL;
532 }
533
534 ep->ib_window_map = devm_kcalloc(dev,
535 BITS_TO_LONGS(ep->num_ib_windows),
536 sizeof(long),
537 GFP_KERNEL);
538 if (!ep->ib_window_map)
539 return -ENOMEM;
540
541 ep->ob_window_map = devm_kcalloc(dev,
542 BITS_TO_LONGS(ep->num_ob_windows),
543 sizeof(long),
544 GFP_KERNEL);
545 if (!ep->ob_window_map)
546 return -ENOMEM;
547
548 addr = devm_kcalloc(dev, ep->num_ob_windows, sizeof(phys_addr_t),
549 GFP_KERNEL);
550 if (!addr)
551 return -ENOMEM;
552 ep->outbound_addr = addr;
553
554 epc = devm_pci_epc_create(dev, &epc_ops);
555 if (IS_ERR(epc)) {
556 dev_err(dev, "Failed to create epc device\n");
557 return PTR_ERR(epc);
558 }
559
560 ep->epc = epc;
561 epc_set_drvdata(epc, ep);
562
563 if (ep->ops->ep_init)
564 ep->ops->ep_init(ep);
565
566 hdr_type = dw_pcie_readb_dbi(pci, PCI_HEADER_TYPE);
567 if (hdr_type != PCI_HEADER_TYPE_NORMAL) {
568 dev_err(pci->dev, "PCIe controller is not set to EP mode (hdr_type:0x%x)!\n",
569 hdr_type);
570 return -EIO;
571 }
572
573 ret = of_property_read_u8(np, "max-functions", &epc->max_functions);
574 if (ret < 0)
575 epc->max_functions = 1;
576
577 ret = __pci_epc_mem_init(epc, ep->phys_base, ep->addr_size,
578 ep->page_size);
579 if (ret < 0) {
580 dev_err(dev, "Failed to initialize address space\n");
581 return ret;
582 }
583
584 ep->msi_mem = pci_epc_mem_alloc_addr(epc, &ep->msi_mem_phys,
585 epc->mem->page_size);
586 if (!ep->msi_mem) {
587 dev_err(dev, "Failed to reserve memory for MSI/MSI-X\n");
588 return -ENOMEM;
589 }
590 ep->msi_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSI);
591
592 ep->msix_cap = dw_pcie_find_capability(pci, PCI_CAP_ID_MSIX);
593
594 offset = dw_pcie_ep_find_ext_capability(pci, PCI_EXT_CAP_ID_REBAR);
595 if (offset) {
596 reg = dw_pcie_readl_dbi(pci, offset + PCI_REBAR_CTRL);
597 nbars = (reg & PCI_REBAR_CTRL_NBAR_MASK) >>
598 PCI_REBAR_CTRL_NBAR_SHIFT;
599
600 dw_pcie_dbi_ro_wr_en(pci);
601 for (i = 0; i < nbars; i++, offset += PCI_REBAR_CTRL)
602 dw_pcie_writel_dbi(pci, offset + PCI_REBAR_CAP, 0x0);
603 dw_pcie_dbi_ro_wr_dis(pci);
604 }
605
606 dw_pcie_setup(pci);
607
608 return 0;
609}