]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Support PCI/PCIe on PowerNV platforms | |
3 | * | |
4 | * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #undef DEBUG | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/crash_dump.h> | |
17 | #include <linux/debugfs.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/bootmem.h> | |
22 | #include <linux/irq.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/msi.h> | |
25 | #include <linux/memblock.h> | |
26 | #include <linux/iommu.h> | |
27 | #include <linux/rculist.h> | |
28 | #include <linux/sizes.h> | |
29 | ||
30 | #include <asm/sections.h> | |
31 | #include <asm/io.h> | |
32 | #include <asm/prom.h> | |
33 | #include <asm/pci-bridge.h> | |
34 | #include <asm/machdep.h> | |
35 | #include <asm/msi_bitmap.h> | |
36 | #include <asm/ppc-pci.h> | |
37 | #include <asm/opal.h> | |
38 | #include <asm/iommu.h> | |
39 | #include <asm/tce.h> | |
40 | #include <asm/xics.h> | |
41 | #include <asm/debug.h> | |
42 | #include <asm/firmware.h> | |
43 | #include <asm/pnv-pci.h> | |
44 | #include <asm/mmzone.h> | |
45 | ||
46 | #include <misc/cxl-base.h> | |
47 | ||
48 | #include "powernv.h" | |
49 | #include "pci.h" | |
50 | ||
51 | #define PNV_IODA1_M64_NUM 16 /* Number of M64 BARs */ | |
52 | #define PNV_IODA1_M64_SEGS 8 /* Segments per M64 BAR */ | |
53 | #define PNV_IODA1_DMA32_SEGSIZE 0x10000000 | |
54 | ||
55 | #define POWERNV_IOMMU_DEFAULT_LEVELS 1 | |
56 | #define POWERNV_IOMMU_MAX_LEVELS 5 | |
57 | ||
58 | static const char * const pnv_phb_names[] = { "IODA1", "IODA2", "NPU" }; | |
59 | static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl); | |
60 | ||
61 | void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, | |
62 | const char *fmt, ...) | |
63 | { | |
64 | struct va_format vaf; | |
65 | va_list args; | |
66 | char pfix[32]; | |
67 | ||
68 | va_start(args, fmt); | |
69 | ||
70 | vaf.fmt = fmt; | |
71 | vaf.va = &args; | |
72 | ||
73 | if (pe->flags & PNV_IODA_PE_DEV) | |
74 | strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix)); | |
75 | else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) | |
76 | sprintf(pfix, "%04x:%02x ", | |
77 | pci_domain_nr(pe->pbus), pe->pbus->number); | |
78 | #ifdef CONFIG_PCI_IOV | |
79 | else if (pe->flags & PNV_IODA_PE_VF) | |
80 | sprintf(pfix, "%04x:%02x:%2x.%d", | |
81 | pci_domain_nr(pe->parent_dev->bus), | |
82 | (pe->rid & 0xff00) >> 8, | |
83 | PCI_SLOT(pe->rid), PCI_FUNC(pe->rid)); | |
84 | #endif /* CONFIG_PCI_IOV*/ | |
85 | ||
86 | printk("%spci %s: [PE# %.3d] %pV", | |
87 | level, pfix, pe->pe_number, &vaf); | |
88 | ||
89 | va_end(args); | |
90 | } | |
91 | ||
92 | static bool pnv_iommu_bypass_disabled __read_mostly; | |
93 | ||
94 | static int __init iommu_setup(char *str) | |
95 | { | |
96 | if (!str) | |
97 | return -EINVAL; | |
98 | ||
99 | while (*str) { | |
100 | if (!strncmp(str, "nobypass", 8)) { | |
101 | pnv_iommu_bypass_disabled = true; | |
102 | pr_info("PowerNV: IOMMU bypass window disabled.\n"); | |
103 | break; | |
104 | } | |
105 | str += strcspn(str, ","); | |
106 | if (*str == ',') | |
107 | str++; | |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
112 | early_param("iommu", iommu_setup); | |
113 | ||
114 | static inline bool pnv_pci_is_mem_pref_64(unsigned long flags) | |
115 | { | |
116 | return ((flags & (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)) == | |
117 | (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)); | |
118 | } | |
119 | ||
120 | static struct pnv_ioda_pe *pnv_ioda_init_pe(struct pnv_phb *phb, int pe_no) | |
121 | { | |
122 | phb->ioda.pe_array[pe_no].phb = phb; | |
123 | phb->ioda.pe_array[pe_no].pe_number = pe_no; | |
124 | ||
125 | return &phb->ioda.pe_array[pe_no]; | |
126 | } | |
127 | ||
128 | static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no) | |
129 | { | |
130 | if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe_num)) { | |
131 | pr_warn("%s: Invalid PE %d on PHB#%x\n", | |
132 | __func__, pe_no, phb->hose->global_number); | |
133 | return; | |
134 | } | |
135 | ||
136 | if (test_and_set_bit(pe_no, phb->ioda.pe_alloc)) | |
137 | pr_debug("%s: PE %d was reserved on PHB#%x\n", | |
138 | __func__, pe_no, phb->hose->global_number); | |
139 | ||
140 | pnv_ioda_init_pe(phb, pe_no); | |
141 | } | |
142 | ||
143 | static struct pnv_ioda_pe *pnv_ioda_alloc_pe(struct pnv_phb *phb) | |
144 | { | |
145 | unsigned long pe = phb->ioda.total_pe_num - 1; | |
146 | ||
147 | for (pe = phb->ioda.total_pe_num - 1; pe >= 0; pe--) { | |
148 | if (!test_and_set_bit(pe, phb->ioda.pe_alloc)) | |
149 | return pnv_ioda_init_pe(phb, pe); | |
150 | } | |
151 | ||
152 | return NULL; | |
153 | } | |
154 | ||
155 | static void pnv_ioda_free_pe(struct pnv_ioda_pe *pe) | |
156 | { | |
157 | struct pnv_phb *phb = pe->phb; | |
158 | ||
159 | WARN_ON(pe->pdev); | |
160 | ||
161 | memset(pe, 0, sizeof(struct pnv_ioda_pe)); | |
162 | clear_bit(pe->pe_number, phb->ioda.pe_alloc); | |
163 | } | |
164 | ||
165 | /* The default M64 BAR is shared by all PEs */ | |
166 | static int pnv_ioda2_init_m64(struct pnv_phb *phb) | |
167 | { | |
168 | const char *desc; | |
169 | struct resource *r; | |
170 | s64 rc; | |
171 | ||
172 | /* Configure the default M64 BAR */ | |
173 | rc = opal_pci_set_phb_mem_window(phb->opal_id, | |
174 | OPAL_M64_WINDOW_TYPE, | |
175 | phb->ioda.m64_bar_idx, | |
176 | phb->ioda.m64_base, | |
177 | 0, /* unused */ | |
178 | phb->ioda.m64_size); | |
179 | if (rc != OPAL_SUCCESS) { | |
180 | desc = "configuring"; | |
181 | goto fail; | |
182 | } | |
183 | ||
184 | /* Enable the default M64 BAR */ | |
185 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
186 | OPAL_M64_WINDOW_TYPE, | |
187 | phb->ioda.m64_bar_idx, | |
188 | OPAL_ENABLE_M64_SPLIT); | |
189 | if (rc != OPAL_SUCCESS) { | |
190 | desc = "enabling"; | |
191 | goto fail; | |
192 | } | |
193 | ||
194 | /* Mark the M64 BAR assigned */ | |
195 | set_bit(phb->ioda.m64_bar_idx, &phb->ioda.m64_bar_alloc); | |
196 | ||
197 | /* | |
198 | * Exclude the segments for reserved and root bus PE, which | |
199 | * are first or last two PEs. | |
200 | */ | |
201 | r = &phb->hose->mem_resources[1]; | |
202 | if (phb->ioda.reserved_pe_idx == 0) | |
203 | r->start += (2 * phb->ioda.m64_segsize); | |
204 | else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) | |
205 | r->end -= (2 * phb->ioda.m64_segsize); | |
206 | else | |
207 | pr_warn(" Cannot strip M64 segment for reserved PE#%d\n", | |
208 | phb->ioda.reserved_pe_idx); | |
209 | ||
210 | return 0; | |
211 | ||
212 | fail: | |
213 | pr_warn(" Failure %lld %s M64 BAR#%d\n", | |
214 | rc, desc, phb->ioda.m64_bar_idx); | |
215 | opal_pci_phb_mmio_enable(phb->opal_id, | |
216 | OPAL_M64_WINDOW_TYPE, | |
217 | phb->ioda.m64_bar_idx, | |
218 | OPAL_DISABLE_M64); | |
219 | return -EIO; | |
220 | } | |
221 | ||
222 | static void pnv_ioda_reserve_dev_m64_pe(struct pci_dev *pdev, | |
223 | unsigned long *pe_bitmap) | |
224 | { | |
225 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
226 | struct pnv_phb *phb = hose->private_data; | |
227 | struct resource *r; | |
228 | resource_size_t base, sgsz, start, end; | |
229 | int segno, i; | |
230 | ||
231 | base = phb->ioda.m64_base; | |
232 | sgsz = phb->ioda.m64_segsize; | |
233 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) { | |
234 | r = &pdev->resource[i]; | |
235 | if (!r->parent || !pnv_pci_is_mem_pref_64(r->flags)) | |
236 | continue; | |
237 | ||
238 | start = _ALIGN_DOWN(r->start - base, sgsz); | |
239 | end = _ALIGN_UP(r->end - base, sgsz); | |
240 | for (segno = start / sgsz; segno < end / sgsz; segno++) { | |
241 | if (pe_bitmap) | |
242 | set_bit(segno, pe_bitmap); | |
243 | else | |
244 | pnv_ioda_reserve_pe(phb, segno); | |
245 | } | |
246 | } | |
247 | } | |
248 | ||
249 | static int pnv_ioda1_init_m64(struct pnv_phb *phb) | |
250 | { | |
251 | struct resource *r; | |
252 | int index; | |
253 | ||
254 | /* | |
255 | * There are 16 M64 BARs, each of which has 8 segments. So | |
256 | * there are as many M64 segments as the maximum number of | |
257 | * PEs, which is 128. | |
258 | */ | |
259 | for (index = 0; index < PNV_IODA1_M64_NUM; index++) { | |
260 | unsigned long base, segsz = phb->ioda.m64_segsize; | |
261 | int64_t rc; | |
262 | ||
263 | base = phb->ioda.m64_base + | |
264 | index * PNV_IODA1_M64_SEGS * segsz; | |
265 | rc = opal_pci_set_phb_mem_window(phb->opal_id, | |
266 | OPAL_M64_WINDOW_TYPE, index, base, 0, | |
267 | PNV_IODA1_M64_SEGS * segsz); | |
268 | if (rc != OPAL_SUCCESS) { | |
269 | pr_warn(" Error %lld setting M64 PHB#%d-BAR#%d\n", | |
270 | rc, phb->hose->global_number, index); | |
271 | goto fail; | |
272 | } | |
273 | ||
274 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
275 | OPAL_M64_WINDOW_TYPE, index, | |
276 | OPAL_ENABLE_M64_SPLIT); | |
277 | if (rc != OPAL_SUCCESS) { | |
278 | pr_warn(" Error %lld enabling M64 PHB#%d-BAR#%d\n", | |
279 | rc, phb->hose->global_number, index); | |
280 | goto fail; | |
281 | } | |
282 | } | |
283 | ||
284 | /* | |
285 | * Exclude the segments for reserved and root bus PE, which | |
286 | * are first or last two PEs. | |
287 | */ | |
288 | r = &phb->hose->mem_resources[1]; | |
289 | if (phb->ioda.reserved_pe_idx == 0) | |
290 | r->start += (2 * phb->ioda.m64_segsize); | |
291 | else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) | |
292 | r->end -= (2 * phb->ioda.m64_segsize); | |
293 | else | |
294 | WARN(1, "Wrong reserved PE#%d on PHB#%d\n", | |
295 | phb->ioda.reserved_pe_idx, phb->hose->global_number); | |
296 | ||
297 | return 0; | |
298 | ||
299 | fail: | |
300 | for ( ; index >= 0; index--) | |
301 | opal_pci_phb_mmio_enable(phb->opal_id, | |
302 | OPAL_M64_WINDOW_TYPE, index, OPAL_DISABLE_M64); | |
303 | ||
304 | return -EIO; | |
305 | } | |
306 | ||
307 | static void pnv_ioda_reserve_m64_pe(struct pci_bus *bus, | |
308 | unsigned long *pe_bitmap, | |
309 | bool all) | |
310 | { | |
311 | struct pci_dev *pdev; | |
312 | ||
313 | list_for_each_entry(pdev, &bus->devices, bus_list) { | |
314 | pnv_ioda_reserve_dev_m64_pe(pdev, pe_bitmap); | |
315 | ||
316 | if (all && pdev->subordinate) | |
317 | pnv_ioda_reserve_m64_pe(pdev->subordinate, | |
318 | pe_bitmap, all); | |
319 | } | |
320 | } | |
321 | ||
322 | static struct pnv_ioda_pe *pnv_ioda_pick_m64_pe(struct pci_bus *bus, bool all) | |
323 | { | |
324 | struct pci_controller *hose = pci_bus_to_host(bus); | |
325 | struct pnv_phb *phb = hose->private_data; | |
326 | struct pnv_ioda_pe *master_pe, *pe; | |
327 | unsigned long size, *pe_alloc; | |
328 | int i; | |
329 | ||
330 | /* Root bus shouldn't use M64 */ | |
331 | if (pci_is_root_bus(bus)) | |
332 | return NULL; | |
333 | ||
334 | /* Allocate bitmap */ | |
335 | size = _ALIGN_UP(phb->ioda.total_pe_num / 8, sizeof(unsigned long)); | |
336 | pe_alloc = kzalloc(size, GFP_KERNEL); | |
337 | if (!pe_alloc) { | |
338 | pr_warn("%s: Out of memory !\n", | |
339 | __func__); | |
340 | return NULL; | |
341 | } | |
342 | ||
343 | /* Figure out reserved PE numbers by the PE */ | |
344 | pnv_ioda_reserve_m64_pe(bus, pe_alloc, all); | |
345 | ||
346 | /* | |
347 | * the current bus might not own M64 window and that's all | |
348 | * contributed by its child buses. For the case, we needn't | |
349 | * pick M64 dependent PE#. | |
350 | */ | |
351 | if (bitmap_empty(pe_alloc, phb->ioda.total_pe_num)) { | |
352 | kfree(pe_alloc); | |
353 | return NULL; | |
354 | } | |
355 | ||
356 | /* | |
357 | * Figure out the master PE and put all slave PEs to master | |
358 | * PE's list to form compound PE. | |
359 | */ | |
360 | master_pe = NULL; | |
361 | i = -1; | |
362 | while ((i = find_next_bit(pe_alloc, phb->ioda.total_pe_num, i + 1)) < | |
363 | phb->ioda.total_pe_num) { | |
364 | pe = &phb->ioda.pe_array[i]; | |
365 | ||
366 | phb->ioda.m64_segmap[pe->pe_number] = pe->pe_number; | |
367 | if (!master_pe) { | |
368 | pe->flags |= PNV_IODA_PE_MASTER; | |
369 | INIT_LIST_HEAD(&pe->slaves); | |
370 | master_pe = pe; | |
371 | } else { | |
372 | pe->flags |= PNV_IODA_PE_SLAVE; | |
373 | pe->master = master_pe; | |
374 | list_add_tail(&pe->list, &master_pe->slaves); | |
375 | } | |
376 | ||
377 | /* | |
378 | * P7IOC supports M64DT, which helps mapping M64 segment | |
379 | * to one particular PE#. However, PHB3 has fixed mapping | |
380 | * between M64 segment and PE#. In order to have same logic | |
381 | * for P7IOC and PHB3, we enforce fixed mapping between M64 | |
382 | * segment and PE# on P7IOC. | |
383 | */ | |
384 | if (phb->type == PNV_PHB_IODA1) { | |
385 | int64_t rc; | |
386 | ||
387 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
388 | pe->pe_number, OPAL_M64_WINDOW_TYPE, | |
389 | pe->pe_number / PNV_IODA1_M64_SEGS, | |
390 | pe->pe_number % PNV_IODA1_M64_SEGS); | |
391 | if (rc != OPAL_SUCCESS) | |
392 | pr_warn("%s: Error %lld mapping M64 for PHB#%d-PE#%d\n", | |
393 | __func__, rc, phb->hose->global_number, | |
394 | pe->pe_number); | |
395 | } | |
396 | } | |
397 | ||
398 | kfree(pe_alloc); | |
399 | return master_pe; | |
400 | } | |
401 | ||
402 | static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb) | |
403 | { | |
404 | struct pci_controller *hose = phb->hose; | |
405 | struct device_node *dn = hose->dn; | |
406 | struct resource *res; | |
407 | const u32 *r; | |
408 | u64 pci_addr; | |
409 | ||
410 | if (phb->type != PNV_PHB_IODA1 && phb->type != PNV_PHB_IODA2) { | |
411 | pr_info(" Not support M64 window\n"); | |
412 | return; | |
413 | } | |
414 | ||
415 | if (!firmware_has_feature(FW_FEATURE_OPAL)) { | |
416 | pr_info(" Firmware too old to support M64 window\n"); | |
417 | return; | |
418 | } | |
419 | ||
420 | r = of_get_property(dn, "ibm,opal-m64-window", NULL); | |
421 | if (!r) { | |
422 | pr_info(" No <ibm,opal-m64-window> on %s\n", | |
423 | dn->full_name); | |
424 | return; | |
425 | } | |
426 | ||
427 | res = &hose->mem_resources[1]; | |
428 | res->name = dn->full_name; | |
429 | res->start = of_translate_address(dn, r + 2); | |
430 | res->end = res->start + of_read_number(r + 4, 2) - 1; | |
431 | res->flags = (IORESOURCE_MEM | IORESOURCE_MEM_64 | IORESOURCE_PREFETCH); | |
432 | pci_addr = of_read_number(r, 2); | |
433 | hose->mem_offset[1] = res->start - pci_addr; | |
434 | ||
435 | phb->ioda.m64_size = resource_size(res); | |
436 | phb->ioda.m64_segsize = phb->ioda.m64_size / phb->ioda.total_pe_num; | |
437 | phb->ioda.m64_base = pci_addr; | |
438 | ||
439 | pr_info(" MEM64 0x%016llx..0x%016llx -> 0x%016llx\n", | |
440 | res->start, res->end, pci_addr); | |
441 | ||
442 | /* Use last M64 BAR to cover M64 window */ | |
443 | phb->ioda.m64_bar_idx = 15; | |
444 | if (phb->type == PNV_PHB_IODA1) | |
445 | phb->init_m64 = pnv_ioda1_init_m64; | |
446 | else | |
447 | phb->init_m64 = pnv_ioda2_init_m64; | |
448 | phb->reserve_m64_pe = pnv_ioda_reserve_m64_pe; | |
449 | phb->pick_m64_pe = pnv_ioda_pick_m64_pe; | |
450 | } | |
451 | ||
452 | static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int pe_no) | |
453 | { | |
454 | struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_no]; | |
455 | struct pnv_ioda_pe *slave; | |
456 | s64 rc; | |
457 | ||
458 | /* Fetch master PE */ | |
459 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
460 | pe = pe->master; | |
461 | if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER))) | |
462 | return; | |
463 | ||
464 | pe_no = pe->pe_number; | |
465 | } | |
466 | ||
467 | /* Freeze master PE */ | |
468 | rc = opal_pci_eeh_freeze_set(phb->opal_id, | |
469 | pe_no, | |
470 | OPAL_EEH_ACTION_SET_FREEZE_ALL); | |
471 | if (rc != OPAL_SUCCESS) { | |
472 | pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", | |
473 | __func__, rc, phb->hose->global_number, pe_no); | |
474 | return; | |
475 | } | |
476 | ||
477 | /* Freeze slave PEs */ | |
478 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
479 | return; | |
480 | ||
481 | list_for_each_entry(slave, &pe->slaves, list) { | |
482 | rc = opal_pci_eeh_freeze_set(phb->opal_id, | |
483 | slave->pe_number, | |
484 | OPAL_EEH_ACTION_SET_FREEZE_ALL); | |
485 | if (rc != OPAL_SUCCESS) | |
486 | pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", | |
487 | __func__, rc, phb->hose->global_number, | |
488 | slave->pe_number); | |
489 | } | |
490 | } | |
491 | ||
492 | static int pnv_ioda_unfreeze_pe(struct pnv_phb *phb, int pe_no, int opt) | |
493 | { | |
494 | struct pnv_ioda_pe *pe, *slave; | |
495 | s64 rc; | |
496 | ||
497 | /* Find master PE */ | |
498 | pe = &phb->ioda.pe_array[pe_no]; | |
499 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
500 | pe = pe->master; | |
501 | WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); | |
502 | pe_no = pe->pe_number; | |
503 | } | |
504 | ||
505 | /* Clear frozen state for master PE */ | |
506 | rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, opt); | |
507 | if (rc != OPAL_SUCCESS) { | |
508 | pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", | |
509 | __func__, rc, opt, phb->hose->global_number, pe_no); | |
510 | return -EIO; | |
511 | } | |
512 | ||
513 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
514 | return 0; | |
515 | ||
516 | /* Clear frozen state for slave PEs */ | |
517 | list_for_each_entry(slave, &pe->slaves, list) { | |
518 | rc = opal_pci_eeh_freeze_clear(phb->opal_id, | |
519 | slave->pe_number, | |
520 | opt); | |
521 | if (rc != OPAL_SUCCESS) { | |
522 | pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", | |
523 | __func__, rc, opt, phb->hose->global_number, | |
524 | slave->pe_number); | |
525 | return -EIO; | |
526 | } | |
527 | } | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no) | |
533 | { | |
534 | struct pnv_ioda_pe *slave, *pe; | |
535 | u8 fstate, state; | |
536 | __be16 pcierr; | |
537 | s64 rc; | |
538 | ||
539 | /* Sanity check on PE number */ | |
540 | if (pe_no < 0 || pe_no >= phb->ioda.total_pe_num) | |
541 | return OPAL_EEH_STOPPED_PERM_UNAVAIL; | |
542 | ||
543 | /* | |
544 | * Fetch the master PE and the PE instance might be | |
545 | * not initialized yet. | |
546 | */ | |
547 | pe = &phb->ioda.pe_array[pe_no]; | |
548 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
549 | pe = pe->master; | |
550 | WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); | |
551 | pe_no = pe->pe_number; | |
552 | } | |
553 | ||
554 | /* Check the master PE */ | |
555 | rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, | |
556 | &state, &pcierr, NULL); | |
557 | if (rc != OPAL_SUCCESS) { | |
558 | pr_warn("%s: Failure %lld getting " | |
559 | "PHB#%x-PE#%x state\n", | |
560 | __func__, rc, | |
561 | phb->hose->global_number, pe_no); | |
562 | return OPAL_EEH_STOPPED_TEMP_UNAVAIL; | |
563 | } | |
564 | ||
565 | /* Check the slave PE */ | |
566 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
567 | return state; | |
568 | ||
569 | list_for_each_entry(slave, &pe->slaves, list) { | |
570 | rc = opal_pci_eeh_freeze_status(phb->opal_id, | |
571 | slave->pe_number, | |
572 | &fstate, | |
573 | &pcierr, | |
574 | NULL); | |
575 | if (rc != OPAL_SUCCESS) { | |
576 | pr_warn("%s: Failure %lld getting " | |
577 | "PHB#%x-PE#%x state\n", | |
578 | __func__, rc, | |
579 | phb->hose->global_number, slave->pe_number); | |
580 | return OPAL_EEH_STOPPED_TEMP_UNAVAIL; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Override the result based on the ascending | |
585 | * priority. | |
586 | */ | |
587 | if (fstate > state) | |
588 | state = fstate; | |
589 | } | |
590 | ||
591 | return state; | |
592 | } | |
593 | ||
594 | /* Currently those 2 are only used when MSIs are enabled, this will change | |
595 | * but in the meantime, we need to protect them to avoid warnings | |
596 | */ | |
597 | #ifdef CONFIG_PCI_MSI | |
598 | struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) | |
599 | { | |
600 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
601 | struct pnv_phb *phb = hose->private_data; | |
602 | struct pci_dn *pdn = pci_get_pdn(dev); | |
603 | ||
604 | if (!pdn) | |
605 | return NULL; | |
606 | if (pdn->pe_number == IODA_INVALID_PE) | |
607 | return NULL; | |
608 | return &phb->ioda.pe_array[pdn->pe_number]; | |
609 | } | |
610 | #endif /* CONFIG_PCI_MSI */ | |
611 | ||
612 | static int pnv_ioda_set_one_peltv(struct pnv_phb *phb, | |
613 | struct pnv_ioda_pe *parent, | |
614 | struct pnv_ioda_pe *child, | |
615 | bool is_add) | |
616 | { | |
617 | const char *desc = is_add ? "adding" : "removing"; | |
618 | uint8_t op = is_add ? OPAL_ADD_PE_TO_DOMAIN : | |
619 | OPAL_REMOVE_PE_FROM_DOMAIN; | |
620 | struct pnv_ioda_pe *slave; | |
621 | long rc; | |
622 | ||
623 | /* Parent PE affects child PE */ | |
624 | rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, | |
625 | child->pe_number, op); | |
626 | if (rc != OPAL_SUCCESS) { | |
627 | pe_warn(child, "OPAL error %ld %s to parent PELTV\n", | |
628 | rc, desc); | |
629 | return -ENXIO; | |
630 | } | |
631 | ||
632 | if (!(child->flags & PNV_IODA_PE_MASTER)) | |
633 | return 0; | |
634 | ||
635 | /* Compound case: parent PE affects slave PEs */ | |
636 | list_for_each_entry(slave, &child->slaves, list) { | |
637 | rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, | |
638 | slave->pe_number, op); | |
639 | if (rc != OPAL_SUCCESS) { | |
640 | pe_warn(slave, "OPAL error %ld %s to parent PELTV\n", | |
641 | rc, desc); | |
642 | return -ENXIO; | |
643 | } | |
644 | } | |
645 | ||
646 | return 0; | |
647 | } | |
648 | ||
649 | static int pnv_ioda_set_peltv(struct pnv_phb *phb, | |
650 | struct pnv_ioda_pe *pe, | |
651 | bool is_add) | |
652 | { | |
653 | struct pnv_ioda_pe *slave; | |
654 | struct pci_dev *pdev = NULL; | |
655 | int ret; | |
656 | ||
657 | /* | |
658 | * Clear PE frozen state. If it's master PE, we need | |
659 | * clear slave PE frozen state as well. | |
660 | */ | |
661 | if (is_add) { | |
662 | opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, | |
663 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
664 | if (pe->flags & PNV_IODA_PE_MASTER) { | |
665 | list_for_each_entry(slave, &pe->slaves, list) | |
666 | opal_pci_eeh_freeze_clear(phb->opal_id, | |
667 | slave->pe_number, | |
668 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
669 | } | |
670 | } | |
671 | ||
672 | /* | |
673 | * Associate PE in PELT. We need add the PE into the | |
674 | * corresponding PELT-V as well. Otherwise, the error | |
675 | * originated from the PE might contribute to other | |
676 | * PEs. | |
677 | */ | |
678 | ret = pnv_ioda_set_one_peltv(phb, pe, pe, is_add); | |
679 | if (ret) | |
680 | return ret; | |
681 | ||
682 | /* For compound PEs, any one affects all of them */ | |
683 | if (pe->flags & PNV_IODA_PE_MASTER) { | |
684 | list_for_each_entry(slave, &pe->slaves, list) { | |
685 | ret = pnv_ioda_set_one_peltv(phb, slave, pe, is_add); | |
686 | if (ret) | |
687 | return ret; | |
688 | } | |
689 | } | |
690 | ||
691 | if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS)) | |
692 | pdev = pe->pbus->self; | |
693 | else if (pe->flags & PNV_IODA_PE_DEV) | |
694 | pdev = pe->pdev->bus->self; | |
695 | #ifdef CONFIG_PCI_IOV | |
696 | else if (pe->flags & PNV_IODA_PE_VF) | |
697 | pdev = pe->parent_dev; | |
698 | #endif /* CONFIG_PCI_IOV */ | |
699 | while (pdev) { | |
700 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
701 | struct pnv_ioda_pe *parent; | |
702 | ||
703 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { | |
704 | parent = &phb->ioda.pe_array[pdn->pe_number]; | |
705 | ret = pnv_ioda_set_one_peltv(phb, parent, pe, is_add); | |
706 | if (ret) | |
707 | return ret; | |
708 | } | |
709 | ||
710 | pdev = pdev->bus->self; | |
711 | } | |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
716 | static int pnv_ioda_deconfigure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) | |
717 | { | |
718 | struct pci_dev *parent; | |
719 | uint8_t bcomp, dcomp, fcomp; | |
720 | int64_t rc; | |
721 | long rid_end, rid; | |
722 | ||
723 | /* Currently, we just deconfigure VF PE. Bus PE will always there.*/ | |
724 | if (pe->pbus) { | |
725 | int count; | |
726 | ||
727 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
728 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
729 | parent = pe->pbus->self; | |
730 | if (pe->flags & PNV_IODA_PE_BUS_ALL) | |
731 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
732 | else | |
733 | count = 1; | |
734 | ||
735 | switch(count) { | |
736 | case 1: bcomp = OpalPciBusAll; break; | |
737 | case 2: bcomp = OpalPciBus7Bits; break; | |
738 | case 4: bcomp = OpalPciBus6Bits; break; | |
739 | case 8: bcomp = OpalPciBus5Bits; break; | |
740 | case 16: bcomp = OpalPciBus4Bits; break; | |
741 | case 32: bcomp = OpalPciBus3Bits; break; | |
742 | default: | |
743 | dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", | |
744 | count); | |
745 | /* Do an exact match only */ | |
746 | bcomp = OpalPciBusAll; | |
747 | } | |
748 | rid_end = pe->rid + (count << 8); | |
749 | } else { | |
750 | #ifdef CONFIG_PCI_IOV | |
751 | if (pe->flags & PNV_IODA_PE_VF) | |
752 | parent = pe->parent_dev; | |
753 | else | |
754 | #endif | |
755 | parent = pe->pdev->bus->self; | |
756 | bcomp = OpalPciBusAll; | |
757 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
758 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
759 | rid_end = pe->rid + 1; | |
760 | } | |
761 | ||
762 | /* Clear the reverse map */ | |
763 | for (rid = pe->rid; rid < rid_end; rid++) | |
764 | phb->ioda.pe_rmap[rid] = IODA_INVALID_PE; | |
765 | ||
766 | /* Release from all parents PELT-V */ | |
767 | while (parent) { | |
768 | struct pci_dn *pdn = pci_get_pdn(parent); | |
769 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { | |
770 | rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, | |
771 | pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); | |
772 | /* XXX What to do in case of error ? */ | |
773 | } | |
774 | parent = parent->bus->self; | |
775 | } | |
776 | ||
777 | opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, | |
778 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
779 | ||
780 | /* Disassociate PE in PELT */ | |
781 | rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number, | |
782 | pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); | |
783 | if (rc) | |
784 | pe_warn(pe, "OPAL error %ld remove self from PELTV\n", rc); | |
785 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, | |
786 | bcomp, dcomp, fcomp, OPAL_UNMAP_PE); | |
787 | if (rc) | |
788 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
789 | ||
790 | pe->pbus = NULL; | |
791 | pe->pdev = NULL; | |
792 | #ifdef CONFIG_PCI_IOV | |
793 | pe->parent_dev = NULL; | |
794 | #endif | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) | |
800 | { | |
801 | struct pci_dev *parent; | |
802 | uint8_t bcomp, dcomp, fcomp; | |
803 | long rc, rid_end, rid; | |
804 | ||
805 | /* Bus validation ? */ | |
806 | if (pe->pbus) { | |
807 | int count; | |
808 | ||
809 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
810 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
811 | parent = pe->pbus->self; | |
812 | if (pe->flags & PNV_IODA_PE_BUS_ALL) | |
813 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
814 | else | |
815 | count = 1; | |
816 | ||
817 | switch(count) { | |
818 | case 1: bcomp = OpalPciBusAll; break; | |
819 | case 2: bcomp = OpalPciBus7Bits; break; | |
820 | case 4: bcomp = OpalPciBus6Bits; break; | |
821 | case 8: bcomp = OpalPciBus5Bits; break; | |
822 | case 16: bcomp = OpalPciBus4Bits; break; | |
823 | case 32: bcomp = OpalPciBus3Bits; break; | |
824 | default: | |
825 | dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", | |
826 | count); | |
827 | /* Do an exact match only */ | |
828 | bcomp = OpalPciBusAll; | |
829 | } | |
830 | rid_end = pe->rid + (count << 8); | |
831 | } else { | |
832 | #ifdef CONFIG_PCI_IOV | |
833 | if (pe->flags & PNV_IODA_PE_VF) | |
834 | parent = pe->parent_dev; | |
835 | else | |
836 | #endif /* CONFIG_PCI_IOV */ | |
837 | parent = pe->pdev->bus->self; | |
838 | bcomp = OpalPciBusAll; | |
839 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
840 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
841 | rid_end = pe->rid + 1; | |
842 | } | |
843 | ||
844 | /* | |
845 | * Associate PE in PELT. We need add the PE into the | |
846 | * corresponding PELT-V as well. Otherwise, the error | |
847 | * originated from the PE might contribute to other | |
848 | * PEs. | |
849 | */ | |
850 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, | |
851 | bcomp, dcomp, fcomp, OPAL_MAP_PE); | |
852 | if (rc) { | |
853 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
854 | return -ENXIO; | |
855 | } | |
856 | ||
857 | /* | |
858 | * Configure PELTV. NPUs don't have a PELTV table so skip | |
859 | * configuration on them. | |
860 | */ | |
861 | if (phb->type != PNV_PHB_NPU) | |
862 | pnv_ioda_set_peltv(phb, pe, true); | |
863 | ||
864 | /* Setup reverse map */ | |
865 | for (rid = pe->rid; rid < rid_end; rid++) | |
866 | phb->ioda.pe_rmap[rid] = pe->pe_number; | |
867 | ||
868 | /* Setup one MVTs on IODA1 */ | |
869 | if (phb->type != PNV_PHB_IODA1) { | |
870 | pe->mve_number = 0; | |
871 | goto out; | |
872 | } | |
873 | ||
874 | pe->mve_number = pe->pe_number; | |
875 | rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, pe->pe_number); | |
876 | if (rc != OPAL_SUCCESS) { | |
877 | pe_err(pe, "OPAL error %ld setting up MVE %d\n", | |
878 | rc, pe->mve_number); | |
879 | pe->mve_number = -1; | |
880 | } else { | |
881 | rc = opal_pci_set_mve_enable(phb->opal_id, | |
882 | pe->mve_number, OPAL_ENABLE_MVE); | |
883 | if (rc) { | |
884 | pe_err(pe, "OPAL error %ld enabling MVE %d\n", | |
885 | rc, pe->mve_number); | |
886 | pe->mve_number = -1; | |
887 | } | |
888 | } | |
889 | ||
890 | out: | |
891 | return 0; | |
892 | } | |
893 | ||
894 | #ifdef CONFIG_PCI_IOV | |
895 | static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset) | |
896 | { | |
897 | struct pci_dn *pdn = pci_get_pdn(dev); | |
898 | int i; | |
899 | struct resource *res, res2; | |
900 | resource_size_t size; | |
901 | u16 num_vfs; | |
902 | ||
903 | if (!dev->is_physfn) | |
904 | return -EINVAL; | |
905 | ||
906 | /* | |
907 | * "offset" is in VFs. The M64 windows are sized so that when they | |
908 | * are segmented, each segment is the same size as the IOV BAR. | |
909 | * Each segment is in a separate PE, and the high order bits of the | |
910 | * address are the PE number. Therefore, each VF's BAR is in a | |
911 | * separate PE, and changing the IOV BAR start address changes the | |
912 | * range of PEs the VFs are in. | |
913 | */ | |
914 | num_vfs = pdn->num_vfs; | |
915 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
916 | res = &dev->resource[i + PCI_IOV_RESOURCES]; | |
917 | if (!res->flags || !res->parent) | |
918 | continue; | |
919 | ||
920 | /* | |
921 | * The actual IOV BAR range is determined by the start address | |
922 | * and the actual size for num_vfs VFs BAR. This check is to | |
923 | * make sure that after shifting, the range will not overlap | |
924 | * with another device. | |
925 | */ | |
926 | size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); | |
927 | res2.flags = res->flags; | |
928 | res2.start = res->start + (size * offset); | |
929 | res2.end = res2.start + (size * num_vfs) - 1; | |
930 | ||
931 | if (res2.end > res->end) { | |
932 | dev_err(&dev->dev, "VF BAR%d: %pR would extend past %pR (trying to enable %d VFs shifted by %d)\n", | |
933 | i, &res2, res, num_vfs, offset); | |
934 | return -EBUSY; | |
935 | } | |
936 | } | |
937 | ||
938 | /* | |
939 | * After doing so, there would be a "hole" in the /proc/iomem when | |
940 | * offset is a positive value. It looks like the device return some | |
941 | * mmio back to the system, which actually no one could use it. | |
942 | */ | |
943 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
944 | res = &dev->resource[i + PCI_IOV_RESOURCES]; | |
945 | if (!res->flags || !res->parent) | |
946 | continue; | |
947 | ||
948 | size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); | |
949 | res2 = *res; | |
950 | res->start += size * offset; | |
951 | ||
952 | dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (%sabling %d VFs shifted by %d)\n", | |
953 | i, &res2, res, (offset > 0) ? "En" : "Dis", | |
954 | num_vfs, offset); | |
955 | pci_update_resource(dev, i + PCI_IOV_RESOURCES); | |
956 | } | |
957 | return 0; | |
958 | } | |
959 | #endif /* CONFIG_PCI_IOV */ | |
960 | ||
961 | static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) | |
962 | { | |
963 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
964 | struct pnv_phb *phb = hose->private_data; | |
965 | struct pci_dn *pdn = pci_get_pdn(dev); | |
966 | struct pnv_ioda_pe *pe; | |
967 | ||
968 | if (!pdn) { | |
969 | pr_err("%s: Device tree node not associated properly\n", | |
970 | pci_name(dev)); | |
971 | return NULL; | |
972 | } | |
973 | if (pdn->pe_number != IODA_INVALID_PE) | |
974 | return NULL; | |
975 | ||
976 | pe = pnv_ioda_alloc_pe(phb); | |
977 | if (!pe) { | |
978 | pr_warning("%s: Not enough PE# available, disabling device\n", | |
979 | pci_name(dev)); | |
980 | return NULL; | |
981 | } | |
982 | ||
983 | /* NOTE: We get only one ref to the pci_dev for the pdn, not for the | |
984 | * pointer in the PE data structure, both should be destroyed at the | |
985 | * same time. However, this needs to be looked at more closely again | |
986 | * once we actually start removing things (Hotplug, SR-IOV, ...) | |
987 | * | |
988 | * At some point we want to remove the PDN completely anyways | |
989 | */ | |
990 | pci_dev_get(dev); | |
991 | pdn->pcidev = dev; | |
992 | pdn->pe_number = pe->pe_number; | |
993 | pe->flags = PNV_IODA_PE_DEV; | |
994 | pe->pdev = dev; | |
995 | pe->pbus = NULL; | |
996 | pe->mve_number = -1; | |
997 | pe->rid = dev->bus->number << 8 | pdn->devfn; | |
998 | ||
999 | pe_info(pe, "Associated device to PE\n"); | |
1000 | ||
1001 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1002 | /* XXX What do we do here ? */ | |
1003 | pnv_ioda_free_pe(pe); | |
1004 | pdn->pe_number = IODA_INVALID_PE; | |
1005 | pe->pdev = NULL; | |
1006 | pci_dev_put(dev); | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
1010 | /* Put PE to the list */ | |
1011 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
1012 | ||
1013 | return pe; | |
1014 | } | |
1015 | ||
1016 | static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) | |
1017 | { | |
1018 | struct pci_dev *dev; | |
1019 | ||
1020 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1021 | struct pci_dn *pdn = pci_get_pdn(dev); | |
1022 | ||
1023 | if (pdn == NULL) { | |
1024 | pr_warn("%s: No device node associated with device !\n", | |
1025 | pci_name(dev)); | |
1026 | continue; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * In partial hotplug case, the PCI device might be still | |
1031 | * associated with the PE and needn't attach it to the PE | |
1032 | * again. | |
1033 | */ | |
1034 | if (pdn->pe_number != IODA_INVALID_PE) | |
1035 | continue; | |
1036 | ||
1037 | pe->device_count++; | |
1038 | pdn->pcidev = dev; | |
1039 | pdn->pe_number = pe->pe_number; | |
1040 | if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) | |
1041 | pnv_ioda_setup_same_PE(dev->subordinate, pe); | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * There're 2 types of PCI bus sensitive PEs: One that is compromised of | |
1047 | * single PCI bus. Another one that contains the primary PCI bus and its | |
1048 | * subordinate PCI devices and buses. The second type of PE is normally | |
1049 | * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. | |
1050 | */ | |
1051 | static struct pnv_ioda_pe *pnv_ioda_setup_bus_PE(struct pci_bus *bus, bool all) | |
1052 | { | |
1053 | struct pci_controller *hose = pci_bus_to_host(bus); | |
1054 | struct pnv_phb *phb = hose->private_data; | |
1055 | struct pnv_ioda_pe *pe = NULL; | |
1056 | unsigned int pe_num; | |
1057 | ||
1058 | /* | |
1059 | * In partial hotplug case, the PE instance might be still alive. | |
1060 | * We should reuse it instead of allocating a new one. | |
1061 | */ | |
1062 | pe_num = phb->ioda.pe_rmap[bus->number << 8]; | |
1063 | if (pe_num != IODA_INVALID_PE) { | |
1064 | pe = &phb->ioda.pe_array[pe_num]; | |
1065 | pnv_ioda_setup_same_PE(bus, pe); | |
1066 | return NULL; | |
1067 | } | |
1068 | ||
1069 | /* PE number for root bus should have been reserved */ | |
1070 | if (pci_is_root_bus(bus) && | |
1071 | phb->ioda.root_pe_idx != IODA_INVALID_PE) | |
1072 | pe = &phb->ioda.pe_array[phb->ioda.root_pe_idx]; | |
1073 | ||
1074 | /* Check if PE is determined by M64 */ | |
1075 | if (!pe && phb->pick_m64_pe) | |
1076 | pe = phb->pick_m64_pe(bus, all); | |
1077 | ||
1078 | /* The PE number isn't pinned by M64 */ | |
1079 | if (!pe) | |
1080 | pe = pnv_ioda_alloc_pe(phb); | |
1081 | ||
1082 | if (!pe) { | |
1083 | pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", | |
1084 | __func__, pci_domain_nr(bus), bus->number); | |
1085 | return NULL; | |
1086 | } | |
1087 | ||
1088 | pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); | |
1089 | pe->pbus = bus; | |
1090 | pe->pdev = NULL; | |
1091 | pe->mve_number = -1; | |
1092 | pe->rid = bus->busn_res.start << 8; | |
1093 | ||
1094 | if (all) | |
1095 | pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", | |
1096 | bus->busn_res.start, bus->busn_res.end, pe->pe_number); | |
1097 | else | |
1098 | pe_info(pe, "Secondary bus %d associated with PE#%d\n", | |
1099 | bus->busn_res.start, pe->pe_number); | |
1100 | ||
1101 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1102 | /* XXX What do we do here ? */ | |
1103 | pnv_ioda_free_pe(pe); | |
1104 | pe->pbus = NULL; | |
1105 | return NULL; | |
1106 | } | |
1107 | ||
1108 | /* Associate it with all child devices */ | |
1109 | pnv_ioda_setup_same_PE(bus, pe); | |
1110 | ||
1111 | /* Put PE to the list */ | |
1112 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
1113 | ||
1114 | return pe; | |
1115 | } | |
1116 | ||
1117 | static struct pnv_ioda_pe *pnv_ioda_setup_npu_PE(struct pci_dev *npu_pdev) | |
1118 | { | |
1119 | int pe_num, found_pe = false, rc; | |
1120 | long rid; | |
1121 | struct pnv_ioda_pe *pe; | |
1122 | struct pci_dev *gpu_pdev; | |
1123 | struct pci_dn *npu_pdn; | |
1124 | struct pci_controller *hose = pci_bus_to_host(npu_pdev->bus); | |
1125 | struct pnv_phb *phb = hose->private_data; | |
1126 | ||
1127 | /* | |
1128 | * Due to a hardware errata PE#0 on the NPU is reserved for | |
1129 | * error handling. This means we only have three PEs remaining | |
1130 | * which need to be assigned to four links, implying some | |
1131 | * links must share PEs. | |
1132 | * | |
1133 | * To achieve this we assign PEs such that NPUs linking the | |
1134 | * same GPU get assigned the same PE. | |
1135 | */ | |
1136 | gpu_pdev = pnv_pci_get_gpu_dev(npu_pdev); | |
1137 | for (pe_num = 0; pe_num < phb->ioda.total_pe_num; pe_num++) { | |
1138 | pe = &phb->ioda.pe_array[pe_num]; | |
1139 | if (!pe->pdev) | |
1140 | continue; | |
1141 | ||
1142 | if (pnv_pci_get_gpu_dev(pe->pdev) == gpu_pdev) { | |
1143 | /* | |
1144 | * This device has the same peer GPU so should | |
1145 | * be assigned the same PE as the existing | |
1146 | * peer NPU. | |
1147 | */ | |
1148 | dev_info(&npu_pdev->dev, | |
1149 | "Associating to existing PE %d\n", pe_num); | |
1150 | pci_dev_get(npu_pdev); | |
1151 | npu_pdn = pci_get_pdn(npu_pdev); | |
1152 | rid = npu_pdev->bus->number << 8 | npu_pdn->devfn; | |
1153 | npu_pdn->pcidev = npu_pdev; | |
1154 | npu_pdn->pe_number = pe_num; | |
1155 | phb->ioda.pe_rmap[rid] = pe->pe_number; | |
1156 | ||
1157 | /* Map the PE to this link */ | |
1158 | rc = opal_pci_set_pe(phb->opal_id, pe_num, rid, | |
1159 | OpalPciBusAll, | |
1160 | OPAL_COMPARE_RID_DEVICE_NUMBER, | |
1161 | OPAL_COMPARE_RID_FUNCTION_NUMBER, | |
1162 | OPAL_MAP_PE); | |
1163 | WARN_ON(rc != OPAL_SUCCESS); | |
1164 | found_pe = true; | |
1165 | break; | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | if (!found_pe) | |
1170 | /* | |
1171 | * Could not find an existing PE so allocate a new | |
1172 | * one. | |
1173 | */ | |
1174 | return pnv_ioda_setup_dev_PE(npu_pdev); | |
1175 | else | |
1176 | return pe; | |
1177 | } | |
1178 | ||
1179 | static void pnv_ioda_setup_npu_PEs(struct pci_bus *bus) | |
1180 | { | |
1181 | struct pci_dev *pdev; | |
1182 | ||
1183 | list_for_each_entry(pdev, &bus->devices, bus_list) | |
1184 | pnv_ioda_setup_npu_PE(pdev); | |
1185 | } | |
1186 | ||
1187 | static void pnv_pci_ioda_setup_PEs(void) | |
1188 | { | |
1189 | struct pci_controller *hose, *tmp; | |
1190 | struct pnv_phb *phb; | |
1191 | ||
1192 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
1193 | phb = hose->private_data; | |
1194 | if (phb->type == PNV_PHB_NPU) { | |
1195 | /* PE#0 is needed for error reporting */ | |
1196 | pnv_ioda_reserve_pe(phb, 0); | |
1197 | pnv_ioda_setup_npu_PEs(hose->bus); | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | #ifdef CONFIG_PCI_IOV | |
1203 | static int pnv_pci_vf_release_m64(struct pci_dev *pdev, u16 num_vfs) | |
1204 | { | |
1205 | struct pci_bus *bus; | |
1206 | struct pci_controller *hose; | |
1207 | struct pnv_phb *phb; | |
1208 | struct pci_dn *pdn; | |
1209 | int i, j; | |
1210 | int m64_bars; | |
1211 | ||
1212 | bus = pdev->bus; | |
1213 | hose = pci_bus_to_host(bus); | |
1214 | phb = hose->private_data; | |
1215 | pdn = pci_get_pdn(pdev); | |
1216 | ||
1217 | if (pdn->m64_single_mode) | |
1218 | m64_bars = num_vfs; | |
1219 | else | |
1220 | m64_bars = 1; | |
1221 | ||
1222 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) | |
1223 | for (j = 0; j < m64_bars; j++) { | |
1224 | if (pdn->m64_map[j][i] == IODA_INVALID_M64) | |
1225 | continue; | |
1226 | opal_pci_phb_mmio_enable(phb->opal_id, | |
1227 | OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 0); | |
1228 | clear_bit(pdn->m64_map[j][i], &phb->ioda.m64_bar_alloc); | |
1229 | pdn->m64_map[j][i] = IODA_INVALID_M64; | |
1230 | } | |
1231 | ||
1232 | kfree(pdn->m64_map); | |
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) | |
1237 | { | |
1238 | struct pci_bus *bus; | |
1239 | struct pci_controller *hose; | |
1240 | struct pnv_phb *phb; | |
1241 | struct pci_dn *pdn; | |
1242 | unsigned int win; | |
1243 | struct resource *res; | |
1244 | int i, j; | |
1245 | int64_t rc; | |
1246 | int total_vfs; | |
1247 | resource_size_t size, start; | |
1248 | int pe_num; | |
1249 | int m64_bars; | |
1250 | ||
1251 | bus = pdev->bus; | |
1252 | hose = pci_bus_to_host(bus); | |
1253 | phb = hose->private_data; | |
1254 | pdn = pci_get_pdn(pdev); | |
1255 | total_vfs = pci_sriov_get_totalvfs(pdev); | |
1256 | ||
1257 | if (pdn->m64_single_mode) | |
1258 | m64_bars = num_vfs; | |
1259 | else | |
1260 | m64_bars = 1; | |
1261 | ||
1262 | pdn->m64_map = kmalloc(sizeof(*pdn->m64_map) * m64_bars, GFP_KERNEL); | |
1263 | if (!pdn->m64_map) | |
1264 | return -ENOMEM; | |
1265 | /* Initialize the m64_map to IODA_INVALID_M64 */ | |
1266 | for (i = 0; i < m64_bars ; i++) | |
1267 | for (j = 0; j < PCI_SRIOV_NUM_BARS; j++) | |
1268 | pdn->m64_map[i][j] = IODA_INVALID_M64; | |
1269 | ||
1270 | ||
1271 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
1272 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
1273 | if (!res->flags || !res->parent) | |
1274 | continue; | |
1275 | ||
1276 | for (j = 0; j < m64_bars; j++) { | |
1277 | do { | |
1278 | win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, | |
1279 | phb->ioda.m64_bar_idx + 1, 0); | |
1280 | ||
1281 | if (win >= phb->ioda.m64_bar_idx + 1) | |
1282 | goto m64_failed; | |
1283 | } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); | |
1284 | ||
1285 | pdn->m64_map[j][i] = win; | |
1286 | ||
1287 | if (pdn->m64_single_mode) { | |
1288 | size = pci_iov_resource_size(pdev, | |
1289 | PCI_IOV_RESOURCES + i); | |
1290 | start = res->start + size * j; | |
1291 | } else { | |
1292 | size = resource_size(res); | |
1293 | start = res->start; | |
1294 | } | |
1295 | ||
1296 | /* Map the M64 here */ | |
1297 | if (pdn->m64_single_mode) { | |
1298 | pe_num = pdn->pe_num_map[j]; | |
1299 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
1300 | pe_num, OPAL_M64_WINDOW_TYPE, | |
1301 | pdn->m64_map[j][i], 0); | |
1302 | } | |
1303 | ||
1304 | rc = opal_pci_set_phb_mem_window(phb->opal_id, | |
1305 | OPAL_M64_WINDOW_TYPE, | |
1306 | pdn->m64_map[j][i], | |
1307 | start, | |
1308 | 0, /* unused */ | |
1309 | size); | |
1310 | ||
1311 | ||
1312 | if (rc != OPAL_SUCCESS) { | |
1313 | dev_err(&pdev->dev, "Failed to map M64 window #%d: %lld\n", | |
1314 | win, rc); | |
1315 | goto m64_failed; | |
1316 | } | |
1317 | ||
1318 | if (pdn->m64_single_mode) | |
1319 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
1320 | OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 2); | |
1321 | else | |
1322 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
1323 | OPAL_M64_WINDOW_TYPE, pdn->m64_map[j][i], 1); | |
1324 | ||
1325 | if (rc != OPAL_SUCCESS) { | |
1326 | dev_err(&pdev->dev, "Failed to enable M64 window #%d: %llx\n", | |
1327 | win, rc); | |
1328 | goto m64_failed; | |
1329 | } | |
1330 | } | |
1331 | } | |
1332 | return 0; | |
1333 | ||
1334 | m64_failed: | |
1335 | pnv_pci_vf_release_m64(pdev, num_vfs); | |
1336 | return -EBUSY; | |
1337 | } | |
1338 | ||
1339 | static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group, | |
1340 | int num); | |
1341 | static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable); | |
1342 | ||
1343 | static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe) | |
1344 | { | |
1345 | struct iommu_table *tbl; | |
1346 | int64_t rc; | |
1347 | ||
1348 | tbl = pe->table_group.tables[0]; | |
1349 | rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0); | |
1350 | if (rc) | |
1351 | pe_warn(pe, "OPAL error %ld release DMA window\n", rc); | |
1352 | ||
1353 | pnv_pci_ioda2_set_bypass(pe, false); | |
1354 | if (pe->table_group.group) { | |
1355 | iommu_group_put(pe->table_group.group); | |
1356 | BUG_ON(pe->table_group.group); | |
1357 | } | |
1358 | pnv_pci_ioda2_table_free_pages(tbl); | |
1359 | iommu_free_table(tbl, of_node_full_name(dev->dev.of_node)); | |
1360 | } | |
1361 | ||
1362 | static void pnv_ioda_release_vf_PE(struct pci_dev *pdev) | |
1363 | { | |
1364 | struct pci_bus *bus; | |
1365 | struct pci_controller *hose; | |
1366 | struct pnv_phb *phb; | |
1367 | struct pnv_ioda_pe *pe, *pe_n; | |
1368 | struct pci_dn *pdn; | |
1369 | ||
1370 | bus = pdev->bus; | |
1371 | hose = pci_bus_to_host(bus); | |
1372 | phb = hose->private_data; | |
1373 | pdn = pci_get_pdn(pdev); | |
1374 | ||
1375 | if (!pdev->is_physfn) | |
1376 | return; | |
1377 | ||
1378 | list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) { | |
1379 | if (pe->parent_dev != pdev) | |
1380 | continue; | |
1381 | ||
1382 | pnv_pci_ioda2_release_dma_pe(pdev, pe); | |
1383 | ||
1384 | /* Remove from list */ | |
1385 | mutex_lock(&phb->ioda.pe_list_mutex); | |
1386 | list_del(&pe->list); | |
1387 | mutex_unlock(&phb->ioda.pe_list_mutex); | |
1388 | ||
1389 | pnv_ioda_deconfigure_pe(phb, pe); | |
1390 | ||
1391 | pnv_ioda_free_pe(pe); | |
1392 | } | |
1393 | } | |
1394 | ||
1395 | void pnv_pci_sriov_disable(struct pci_dev *pdev) | |
1396 | { | |
1397 | struct pci_bus *bus; | |
1398 | struct pci_controller *hose; | |
1399 | struct pnv_phb *phb; | |
1400 | struct pnv_ioda_pe *pe; | |
1401 | struct pci_dn *pdn; | |
1402 | struct pci_sriov *iov; | |
1403 | u16 num_vfs, i; | |
1404 | ||
1405 | bus = pdev->bus; | |
1406 | hose = pci_bus_to_host(bus); | |
1407 | phb = hose->private_data; | |
1408 | pdn = pci_get_pdn(pdev); | |
1409 | iov = pdev->sriov; | |
1410 | num_vfs = pdn->num_vfs; | |
1411 | ||
1412 | /* Release VF PEs */ | |
1413 | pnv_ioda_release_vf_PE(pdev); | |
1414 | ||
1415 | if (phb->type == PNV_PHB_IODA2) { | |
1416 | if (!pdn->m64_single_mode) | |
1417 | pnv_pci_vf_resource_shift(pdev, -*pdn->pe_num_map); | |
1418 | ||
1419 | /* Release M64 windows */ | |
1420 | pnv_pci_vf_release_m64(pdev, num_vfs); | |
1421 | ||
1422 | /* Release PE numbers */ | |
1423 | if (pdn->m64_single_mode) { | |
1424 | for (i = 0; i < num_vfs; i++) { | |
1425 | if (pdn->pe_num_map[i] == IODA_INVALID_PE) | |
1426 | continue; | |
1427 | ||
1428 | pe = &phb->ioda.pe_array[pdn->pe_num_map[i]]; | |
1429 | pnv_ioda_free_pe(pe); | |
1430 | } | |
1431 | } else | |
1432 | bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); | |
1433 | /* Releasing pe_num_map */ | |
1434 | kfree(pdn->pe_num_map); | |
1435 | } | |
1436 | } | |
1437 | ||
1438 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, | |
1439 | struct pnv_ioda_pe *pe); | |
1440 | static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) | |
1441 | { | |
1442 | struct pci_bus *bus; | |
1443 | struct pci_controller *hose; | |
1444 | struct pnv_phb *phb; | |
1445 | struct pnv_ioda_pe *pe; | |
1446 | int pe_num; | |
1447 | u16 vf_index; | |
1448 | struct pci_dn *pdn; | |
1449 | ||
1450 | bus = pdev->bus; | |
1451 | hose = pci_bus_to_host(bus); | |
1452 | phb = hose->private_data; | |
1453 | pdn = pci_get_pdn(pdev); | |
1454 | ||
1455 | if (!pdev->is_physfn) | |
1456 | return; | |
1457 | ||
1458 | /* Reserve PE for each VF */ | |
1459 | for (vf_index = 0; vf_index < num_vfs; vf_index++) { | |
1460 | if (pdn->m64_single_mode) | |
1461 | pe_num = pdn->pe_num_map[vf_index]; | |
1462 | else | |
1463 | pe_num = *pdn->pe_num_map + vf_index; | |
1464 | ||
1465 | pe = &phb->ioda.pe_array[pe_num]; | |
1466 | pe->pe_number = pe_num; | |
1467 | pe->phb = phb; | |
1468 | pe->flags = PNV_IODA_PE_VF; | |
1469 | pe->pbus = NULL; | |
1470 | pe->parent_dev = pdev; | |
1471 | pe->mve_number = -1; | |
1472 | pe->rid = (pci_iov_virtfn_bus(pdev, vf_index) << 8) | | |
1473 | pci_iov_virtfn_devfn(pdev, vf_index); | |
1474 | ||
1475 | pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%d\n", | |
1476 | hose->global_number, pdev->bus->number, | |
1477 | PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)), | |
1478 | PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pe_num); | |
1479 | ||
1480 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1481 | /* XXX What do we do here ? */ | |
1482 | pnv_ioda_free_pe(pe); | |
1483 | pe->pdev = NULL; | |
1484 | continue; | |
1485 | } | |
1486 | ||
1487 | /* Put PE to the list */ | |
1488 | mutex_lock(&phb->ioda.pe_list_mutex); | |
1489 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
1490 | mutex_unlock(&phb->ioda.pe_list_mutex); | |
1491 | ||
1492 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
1493 | } | |
1494 | } | |
1495 | ||
1496 | int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | |
1497 | { | |
1498 | struct pci_bus *bus; | |
1499 | struct pci_controller *hose; | |
1500 | struct pnv_phb *phb; | |
1501 | struct pnv_ioda_pe *pe; | |
1502 | struct pci_dn *pdn; | |
1503 | int ret; | |
1504 | u16 i; | |
1505 | ||
1506 | bus = pdev->bus; | |
1507 | hose = pci_bus_to_host(bus); | |
1508 | phb = hose->private_data; | |
1509 | pdn = pci_get_pdn(pdev); | |
1510 | ||
1511 | if (phb->type == PNV_PHB_IODA2) { | |
1512 | if (!pdn->vfs_expanded) { | |
1513 | dev_info(&pdev->dev, "don't support this SRIOV device" | |
1514 | " with non 64bit-prefetchable IOV BAR\n"); | |
1515 | return -ENOSPC; | |
1516 | } | |
1517 | ||
1518 | /* | |
1519 | * When M64 BARs functions in Single PE mode, the number of VFs | |
1520 | * could be enabled must be less than the number of M64 BARs. | |
1521 | */ | |
1522 | if (pdn->m64_single_mode && num_vfs > phb->ioda.m64_bar_idx) { | |
1523 | dev_info(&pdev->dev, "Not enough M64 BAR for VFs\n"); | |
1524 | return -EBUSY; | |
1525 | } | |
1526 | ||
1527 | /* Allocating pe_num_map */ | |
1528 | if (pdn->m64_single_mode) | |
1529 | pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map) * num_vfs, | |
1530 | GFP_KERNEL); | |
1531 | else | |
1532 | pdn->pe_num_map = kmalloc(sizeof(*pdn->pe_num_map), GFP_KERNEL); | |
1533 | ||
1534 | if (!pdn->pe_num_map) | |
1535 | return -ENOMEM; | |
1536 | ||
1537 | if (pdn->m64_single_mode) | |
1538 | for (i = 0; i < num_vfs; i++) | |
1539 | pdn->pe_num_map[i] = IODA_INVALID_PE; | |
1540 | ||
1541 | /* Calculate available PE for required VFs */ | |
1542 | if (pdn->m64_single_mode) { | |
1543 | for (i = 0; i < num_vfs; i++) { | |
1544 | pe = pnv_ioda_alloc_pe(phb); | |
1545 | if (!pe) { | |
1546 | ret = -EBUSY; | |
1547 | goto m64_failed; | |
1548 | } | |
1549 | ||
1550 | pdn->pe_num_map[i] = pe->pe_number; | |
1551 | } | |
1552 | } else { | |
1553 | mutex_lock(&phb->ioda.pe_alloc_mutex); | |
1554 | *pdn->pe_num_map = bitmap_find_next_zero_area( | |
1555 | phb->ioda.pe_alloc, phb->ioda.total_pe_num, | |
1556 | 0, num_vfs, 0); | |
1557 | if (*pdn->pe_num_map >= phb->ioda.total_pe_num) { | |
1558 | mutex_unlock(&phb->ioda.pe_alloc_mutex); | |
1559 | dev_info(&pdev->dev, "Failed to enable VF%d\n", num_vfs); | |
1560 | kfree(pdn->pe_num_map); | |
1561 | return -EBUSY; | |
1562 | } | |
1563 | bitmap_set(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); | |
1564 | mutex_unlock(&phb->ioda.pe_alloc_mutex); | |
1565 | } | |
1566 | pdn->num_vfs = num_vfs; | |
1567 | ||
1568 | /* Assign M64 window accordingly */ | |
1569 | ret = pnv_pci_vf_assign_m64(pdev, num_vfs); | |
1570 | if (ret) { | |
1571 | dev_info(&pdev->dev, "Not enough M64 window resources\n"); | |
1572 | goto m64_failed; | |
1573 | } | |
1574 | ||
1575 | /* | |
1576 | * When using one M64 BAR to map one IOV BAR, we need to shift | |
1577 | * the IOV BAR according to the PE# allocated to the VFs. | |
1578 | * Otherwise, the PE# for the VF will conflict with others. | |
1579 | */ | |
1580 | if (!pdn->m64_single_mode) { | |
1581 | ret = pnv_pci_vf_resource_shift(pdev, *pdn->pe_num_map); | |
1582 | if (ret) | |
1583 | goto m64_failed; | |
1584 | } | |
1585 | } | |
1586 | ||
1587 | /* Setup VF PEs */ | |
1588 | pnv_ioda_setup_vf_PE(pdev, num_vfs); | |
1589 | ||
1590 | return 0; | |
1591 | ||
1592 | m64_failed: | |
1593 | if (pdn->m64_single_mode) { | |
1594 | for (i = 0; i < num_vfs; i++) { | |
1595 | if (pdn->pe_num_map[i] == IODA_INVALID_PE) | |
1596 | continue; | |
1597 | ||
1598 | pe = &phb->ioda.pe_array[pdn->pe_num_map[i]]; | |
1599 | pnv_ioda_free_pe(pe); | |
1600 | } | |
1601 | } else | |
1602 | bitmap_clear(phb->ioda.pe_alloc, *pdn->pe_num_map, num_vfs); | |
1603 | ||
1604 | /* Releasing pe_num_map */ | |
1605 | kfree(pdn->pe_num_map); | |
1606 | ||
1607 | return ret; | |
1608 | } | |
1609 | ||
1610 | int pcibios_sriov_disable(struct pci_dev *pdev) | |
1611 | { | |
1612 | pnv_pci_sriov_disable(pdev); | |
1613 | ||
1614 | /* Release PCI data */ | |
1615 | remove_dev_pci_data(pdev); | |
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | |
1620 | { | |
1621 | /* Allocate PCI data */ | |
1622 | add_dev_pci_data(pdev); | |
1623 | ||
1624 | return pnv_pci_sriov_enable(pdev, num_vfs); | |
1625 | } | |
1626 | #endif /* CONFIG_PCI_IOV */ | |
1627 | ||
1628 | static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) | |
1629 | { | |
1630 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
1631 | struct pnv_ioda_pe *pe; | |
1632 | ||
1633 | /* | |
1634 | * The function can be called while the PE# | |
1635 | * hasn't been assigned. Do nothing for the | |
1636 | * case. | |
1637 | */ | |
1638 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
1639 | return; | |
1640 | ||
1641 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
1642 | WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); | |
1643 | set_dma_offset(&pdev->dev, pe->tce_bypass_base); | |
1644 | set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); | |
1645 | /* | |
1646 | * Note: iommu_add_device() will fail here as | |
1647 | * for physical PE: the device is already added by now; | |
1648 | * for virtual PE: sysfs entries are not ready yet and | |
1649 | * tce_iommu_bus_notifier will add the device to a group later. | |
1650 | */ | |
1651 | } | |
1652 | ||
1653 | static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) | |
1654 | { | |
1655 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
1656 | struct pnv_phb *phb = hose->private_data; | |
1657 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
1658 | struct pnv_ioda_pe *pe; | |
1659 | uint64_t top; | |
1660 | bool bypass = false; | |
1661 | ||
1662 | if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) | |
1663 | return -ENODEV;; | |
1664 | ||
1665 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
1666 | if (pe->tce_bypass_enabled) { | |
1667 | top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; | |
1668 | bypass = (dma_mask >= top); | |
1669 | } | |
1670 | ||
1671 | if (bypass) { | |
1672 | dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); | |
1673 | set_dma_ops(&pdev->dev, &dma_direct_ops); | |
1674 | } else { | |
1675 | dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); | |
1676 | set_dma_ops(&pdev->dev, &dma_iommu_ops); | |
1677 | } | |
1678 | *pdev->dev.dma_mask = dma_mask; | |
1679 | ||
1680 | /* Update peer npu devices */ | |
1681 | pnv_npu_try_dma_set_bypass(pdev, bypass); | |
1682 | ||
1683 | return 0; | |
1684 | } | |
1685 | ||
1686 | static u64 pnv_pci_ioda_dma_get_required_mask(struct pci_dev *pdev) | |
1687 | { | |
1688 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
1689 | struct pnv_phb *phb = hose->private_data; | |
1690 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
1691 | struct pnv_ioda_pe *pe; | |
1692 | u64 end, mask; | |
1693 | ||
1694 | if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) | |
1695 | return 0; | |
1696 | ||
1697 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
1698 | if (!pe->tce_bypass_enabled) | |
1699 | return __dma_get_required_mask(&pdev->dev); | |
1700 | ||
1701 | ||
1702 | end = pe->tce_bypass_base + memblock_end_of_DRAM(); | |
1703 | mask = 1ULL << (fls64(end) - 1); | |
1704 | mask += mask - 1; | |
1705 | ||
1706 | return mask; | |
1707 | } | |
1708 | ||
1709 | static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, | |
1710 | struct pci_bus *bus) | |
1711 | { | |
1712 | struct pci_dev *dev; | |
1713 | ||
1714 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1715 | set_iommu_table_base(&dev->dev, pe->table_group.tables[0]); | |
1716 | set_dma_offset(&dev->dev, pe->tce_bypass_base); | |
1717 | iommu_add_device(&dev->dev); | |
1718 | ||
1719 | if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) | |
1720 | pnv_ioda_setup_bus_dma(pe, dev->subordinate); | |
1721 | } | |
1722 | } | |
1723 | ||
1724 | static inline __be64 __iomem *pnv_ioda_get_inval_reg(struct pnv_phb *phb, | |
1725 | bool real_mode) | |
1726 | { | |
1727 | return real_mode ? (__be64 __iomem *)(phb->regs_phys + 0x210) : | |
1728 | (phb->regs + 0x210); | |
1729 | } | |
1730 | ||
1731 | static void pnv_pci_p7ioc_tce_invalidate(struct iommu_table *tbl, | |
1732 | unsigned long index, unsigned long npages, bool rm) | |
1733 | { | |
1734 | struct iommu_table_group_link *tgl = list_first_entry_or_null( | |
1735 | &tbl->it_group_list, struct iommu_table_group_link, | |
1736 | next); | |
1737 | struct pnv_ioda_pe *pe = container_of(tgl->table_group, | |
1738 | struct pnv_ioda_pe, table_group); | |
1739 | __be64 __iomem *invalidate = pnv_ioda_get_inval_reg(pe->phb, rm); | |
1740 | unsigned long start, end, inc; | |
1741 | ||
1742 | start = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset); | |
1743 | end = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset + | |
1744 | npages - 1); | |
1745 | ||
1746 | /* p7ioc-style invalidation, 2 TCEs per write */ | |
1747 | start |= (1ull << 63); | |
1748 | end |= (1ull << 63); | |
1749 | inc = 16; | |
1750 | end |= inc - 1; /* round up end to be different than start */ | |
1751 | ||
1752 | mb(); /* Ensure above stores are visible */ | |
1753 | while (start <= end) { | |
1754 | if (rm) | |
1755 | __raw_rm_writeq(cpu_to_be64(start), invalidate); | |
1756 | else | |
1757 | __raw_writeq(cpu_to_be64(start), invalidate); | |
1758 | start += inc; | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * The iommu layer will do another mb() for us on build() | |
1763 | * and we don't care on free() | |
1764 | */ | |
1765 | } | |
1766 | ||
1767 | static int pnv_ioda1_tce_build(struct iommu_table *tbl, long index, | |
1768 | long npages, unsigned long uaddr, | |
1769 | enum dma_data_direction direction, | |
1770 | struct dma_attrs *attrs) | |
1771 | { | |
1772 | int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, | |
1773 | attrs); | |
1774 | ||
1775 | if (!ret) | |
1776 | pnv_pci_p7ioc_tce_invalidate(tbl, index, npages, false); | |
1777 | ||
1778 | return ret; | |
1779 | } | |
1780 | ||
1781 | #ifdef CONFIG_IOMMU_API | |
1782 | static int pnv_ioda1_tce_xchg(struct iommu_table *tbl, long index, | |
1783 | unsigned long *hpa, enum dma_data_direction *direction) | |
1784 | { | |
1785 | long ret = pnv_tce_xchg(tbl, index, hpa, direction); | |
1786 | ||
1787 | if (!ret) | |
1788 | pnv_pci_p7ioc_tce_invalidate(tbl, index, 1, false); | |
1789 | ||
1790 | return ret; | |
1791 | } | |
1792 | #endif | |
1793 | ||
1794 | static void pnv_ioda1_tce_free(struct iommu_table *tbl, long index, | |
1795 | long npages) | |
1796 | { | |
1797 | pnv_tce_free(tbl, index, npages); | |
1798 | ||
1799 | pnv_pci_p7ioc_tce_invalidate(tbl, index, npages, false); | |
1800 | } | |
1801 | ||
1802 | static struct iommu_table_ops pnv_ioda1_iommu_ops = { | |
1803 | .set = pnv_ioda1_tce_build, | |
1804 | #ifdef CONFIG_IOMMU_API | |
1805 | .exchange = pnv_ioda1_tce_xchg, | |
1806 | #endif | |
1807 | .clear = pnv_ioda1_tce_free, | |
1808 | .get = pnv_tce_get, | |
1809 | }; | |
1810 | ||
1811 | #define PHB3_TCE_KILL_INVAL_ALL PPC_BIT(0) | |
1812 | #define PHB3_TCE_KILL_INVAL_PE PPC_BIT(1) | |
1813 | #define PHB3_TCE_KILL_INVAL_ONE PPC_BIT(2) | |
1814 | ||
1815 | void pnv_pci_phb3_tce_invalidate_entire(struct pnv_phb *phb, bool rm) | |
1816 | { | |
1817 | __be64 __iomem *invalidate = pnv_ioda_get_inval_reg(phb, rm); | |
1818 | const unsigned long val = PHB3_TCE_KILL_INVAL_ALL; | |
1819 | ||
1820 | mb(); /* Ensure previous TCE table stores are visible */ | |
1821 | if (rm) | |
1822 | __raw_rm_writeq(cpu_to_be64(val), invalidate); | |
1823 | else | |
1824 | __raw_writeq(cpu_to_be64(val), invalidate); | |
1825 | } | |
1826 | ||
1827 | static inline void pnv_pci_phb3_tce_invalidate_pe(struct pnv_ioda_pe *pe) | |
1828 | { | |
1829 | /* 01xb - invalidate TCEs that match the specified PE# */ | |
1830 | __be64 __iomem *invalidate = pnv_ioda_get_inval_reg(pe->phb, false); | |
1831 | unsigned long val = PHB3_TCE_KILL_INVAL_PE | (pe->pe_number & 0xFF); | |
1832 | ||
1833 | mb(); /* Ensure above stores are visible */ | |
1834 | __raw_writeq(cpu_to_be64(val), invalidate); | |
1835 | } | |
1836 | ||
1837 | static void pnv_pci_phb3_tce_invalidate(struct pnv_ioda_pe *pe, bool rm, | |
1838 | unsigned shift, unsigned long index, | |
1839 | unsigned long npages) | |
1840 | { | |
1841 | __be64 __iomem *invalidate = pnv_ioda_get_inval_reg(pe->phb, false); | |
1842 | unsigned long start, end, inc; | |
1843 | ||
1844 | /* We'll invalidate DMA address in PE scope */ | |
1845 | start = PHB3_TCE_KILL_INVAL_ONE; | |
1846 | start |= (pe->pe_number & 0xFF); | |
1847 | end = start; | |
1848 | ||
1849 | /* Figure out the start, end and step */ | |
1850 | start |= (index << shift); | |
1851 | end |= ((index + npages - 1) << shift); | |
1852 | inc = (0x1ull << shift); | |
1853 | mb(); | |
1854 | ||
1855 | while (start <= end) { | |
1856 | if (rm) | |
1857 | __raw_rm_writeq(cpu_to_be64(start), invalidate); | |
1858 | else | |
1859 | __raw_writeq(cpu_to_be64(start), invalidate); | |
1860 | start += inc; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | static inline void pnv_pci_ioda2_tce_invalidate_pe(struct pnv_ioda_pe *pe) | |
1865 | { | |
1866 | struct pnv_phb *phb = pe->phb; | |
1867 | ||
1868 | if (phb->model == PNV_PHB_MODEL_PHB3 && phb->regs) | |
1869 | pnv_pci_phb3_tce_invalidate_pe(pe); | |
1870 | else | |
1871 | opal_pci_tce_kill(phb->opal_id, OPAL_PCI_TCE_KILL_PE, | |
1872 | pe->pe_number, 0, 0, 0); | |
1873 | } | |
1874 | ||
1875 | static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl, | |
1876 | unsigned long index, unsigned long npages, bool rm) | |
1877 | { | |
1878 | struct iommu_table_group_link *tgl; | |
1879 | ||
1880 | list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) { | |
1881 | struct pnv_ioda_pe *pe = container_of(tgl->table_group, | |
1882 | struct pnv_ioda_pe, table_group); | |
1883 | struct pnv_phb *phb = pe->phb; | |
1884 | unsigned int shift = tbl->it_page_shift; | |
1885 | ||
1886 | if (phb->type == PNV_PHB_NPU) { | |
1887 | /* | |
1888 | * The NVLink hardware does not support TCE kill | |
1889 | * per TCE entry so we have to invalidate | |
1890 | * the entire cache for it. | |
1891 | */ | |
1892 | pnv_pci_phb3_tce_invalidate_entire(phb, rm); | |
1893 | continue; | |
1894 | } | |
1895 | if (phb->model == PNV_PHB_MODEL_PHB3 && phb->regs) | |
1896 | pnv_pci_phb3_tce_invalidate(pe, rm, shift, | |
1897 | index, npages); | |
1898 | else if (rm) | |
1899 | opal_rm_pci_tce_kill(phb->opal_id, | |
1900 | OPAL_PCI_TCE_KILL_PAGES, | |
1901 | pe->pe_number, 1u << shift, | |
1902 | index << shift, npages); | |
1903 | else | |
1904 | opal_pci_tce_kill(phb->opal_id, | |
1905 | OPAL_PCI_TCE_KILL_PAGES, | |
1906 | pe->pe_number, 1u << shift, | |
1907 | index << shift, npages); | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | static int pnv_ioda2_tce_build(struct iommu_table *tbl, long index, | |
1912 | long npages, unsigned long uaddr, | |
1913 | enum dma_data_direction direction, | |
1914 | struct dma_attrs *attrs) | |
1915 | { | |
1916 | int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, | |
1917 | attrs); | |
1918 | ||
1919 | if (!ret) | |
1920 | pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); | |
1921 | ||
1922 | return ret; | |
1923 | } | |
1924 | ||
1925 | #ifdef CONFIG_IOMMU_API | |
1926 | static int pnv_ioda2_tce_xchg(struct iommu_table *tbl, long index, | |
1927 | unsigned long *hpa, enum dma_data_direction *direction) | |
1928 | { | |
1929 | long ret = pnv_tce_xchg(tbl, index, hpa, direction); | |
1930 | ||
1931 | if (!ret) | |
1932 | pnv_pci_ioda2_tce_invalidate(tbl, index, 1, false); | |
1933 | ||
1934 | return ret; | |
1935 | } | |
1936 | #endif | |
1937 | ||
1938 | static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index, | |
1939 | long npages) | |
1940 | { | |
1941 | pnv_tce_free(tbl, index, npages); | |
1942 | ||
1943 | pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); | |
1944 | } | |
1945 | ||
1946 | static void pnv_ioda2_table_free(struct iommu_table *tbl) | |
1947 | { | |
1948 | pnv_pci_ioda2_table_free_pages(tbl); | |
1949 | iommu_free_table(tbl, "pnv"); | |
1950 | } | |
1951 | ||
1952 | static struct iommu_table_ops pnv_ioda2_iommu_ops = { | |
1953 | .set = pnv_ioda2_tce_build, | |
1954 | #ifdef CONFIG_IOMMU_API | |
1955 | .exchange = pnv_ioda2_tce_xchg, | |
1956 | #endif | |
1957 | .clear = pnv_ioda2_tce_free, | |
1958 | .get = pnv_tce_get, | |
1959 | .free = pnv_ioda2_table_free, | |
1960 | }; | |
1961 | ||
1962 | static int pnv_pci_ioda_dev_dma_weight(struct pci_dev *dev, void *data) | |
1963 | { | |
1964 | unsigned int *weight = (unsigned int *)data; | |
1965 | ||
1966 | /* This is quite simplistic. The "base" weight of a device | |
1967 | * is 10. 0 means no DMA is to be accounted for it. | |
1968 | */ | |
1969 | if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) | |
1970 | return 0; | |
1971 | ||
1972 | if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || | |
1973 | dev->class == PCI_CLASS_SERIAL_USB_OHCI || | |
1974 | dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
1975 | *weight += 3; | |
1976 | else if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) | |
1977 | *weight += 15; | |
1978 | else | |
1979 | *weight += 10; | |
1980 | ||
1981 | return 0; | |
1982 | } | |
1983 | ||
1984 | static unsigned int pnv_pci_ioda_pe_dma_weight(struct pnv_ioda_pe *pe) | |
1985 | { | |
1986 | unsigned int weight = 0; | |
1987 | ||
1988 | /* SRIOV VF has same DMA32 weight as its PF */ | |
1989 | #ifdef CONFIG_PCI_IOV | |
1990 | if ((pe->flags & PNV_IODA_PE_VF) && pe->parent_dev) { | |
1991 | pnv_pci_ioda_dev_dma_weight(pe->parent_dev, &weight); | |
1992 | return weight; | |
1993 | } | |
1994 | #endif | |
1995 | ||
1996 | if ((pe->flags & PNV_IODA_PE_DEV) && pe->pdev) { | |
1997 | pnv_pci_ioda_dev_dma_weight(pe->pdev, &weight); | |
1998 | } else if ((pe->flags & PNV_IODA_PE_BUS) && pe->pbus) { | |
1999 | struct pci_dev *pdev; | |
2000 | ||
2001 | list_for_each_entry(pdev, &pe->pbus->devices, bus_list) | |
2002 | pnv_pci_ioda_dev_dma_weight(pdev, &weight); | |
2003 | } else if ((pe->flags & PNV_IODA_PE_BUS_ALL) && pe->pbus) { | |
2004 | pci_walk_bus(pe->pbus, pnv_pci_ioda_dev_dma_weight, &weight); | |
2005 | } | |
2006 | ||
2007 | return weight; | |
2008 | } | |
2009 | ||
2010 | static void pnv_pci_ioda1_setup_dma_pe(struct pnv_phb *phb, | |
2011 | struct pnv_ioda_pe *pe) | |
2012 | { | |
2013 | ||
2014 | struct page *tce_mem = NULL; | |
2015 | struct iommu_table *tbl; | |
2016 | unsigned int weight, total_weight = 0; | |
2017 | unsigned int tce32_segsz, base, segs, avail, i; | |
2018 | int64_t rc; | |
2019 | void *addr; | |
2020 | ||
2021 | /* XXX FIXME: Handle 64-bit only DMA devices */ | |
2022 | /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ | |
2023 | /* XXX FIXME: Allocate multi-level tables on PHB3 */ | |
2024 | weight = pnv_pci_ioda_pe_dma_weight(pe); | |
2025 | if (!weight) | |
2026 | return; | |
2027 | ||
2028 | pci_walk_bus(phb->hose->bus, pnv_pci_ioda_dev_dma_weight, | |
2029 | &total_weight); | |
2030 | segs = (weight * phb->ioda.dma32_count) / total_weight; | |
2031 | if (!segs) | |
2032 | segs = 1; | |
2033 | ||
2034 | /* | |
2035 | * Allocate contiguous DMA32 segments. We begin with the expected | |
2036 | * number of segments. With one more attempt, the number of DMA32 | |
2037 | * segments to be allocated is decreased by one until one segment | |
2038 | * is allocated successfully. | |
2039 | */ | |
2040 | do { | |
2041 | for (base = 0; base <= phb->ioda.dma32_count - segs; base++) { | |
2042 | for (avail = 0, i = base; i < base + segs; i++) { | |
2043 | if (phb->ioda.dma32_segmap[i] == | |
2044 | IODA_INVALID_PE) | |
2045 | avail++; | |
2046 | } | |
2047 | ||
2048 | if (avail == segs) | |
2049 | goto found; | |
2050 | } | |
2051 | } while (--segs); | |
2052 | ||
2053 | if (!segs) { | |
2054 | pe_warn(pe, "No available DMA32 segments\n"); | |
2055 | return; | |
2056 | } | |
2057 | ||
2058 | found: | |
2059 | tbl = pnv_pci_table_alloc(phb->hose->node); | |
2060 | iommu_register_group(&pe->table_group, phb->hose->global_number, | |
2061 | pe->pe_number); | |
2062 | pnv_pci_link_table_and_group(phb->hose->node, 0, tbl, &pe->table_group); | |
2063 | ||
2064 | /* Grab a 32-bit TCE table */ | |
2065 | pe_info(pe, "DMA weight %d (%d), assigned (%d) %d DMA32 segments\n", | |
2066 | weight, total_weight, base, segs); | |
2067 | pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", | |
2068 | base * PNV_IODA1_DMA32_SEGSIZE, | |
2069 | (base + segs) * PNV_IODA1_DMA32_SEGSIZE - 1); | |
2070 | ||
2071 | /* XXX Currently, we allocate one big contiguous table for the | |
2072 | * TCEs. We only really need one chunk per 256M of TCE space | |
2073 | * (ie per segment) but that's an optimization for later, it | |
2074 | * requires some added smarts with our get/put_tce implementation | |
2075 | * | |
2076 | * Each TCE page is 4KB in size and each TCE entry occupies 8 | |
2077 | * bytes | |
2078 | */ | |
2079 | tce32_segsz = PNV_IODA1_DMA32_SEGSIZE >> (IOMMU_PAGE_SHIFT_4K - 3); | |
2080 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
2081 | get_order(tce32_segsz * segs)); | |
2082 | if (!tce_mem) { | |
2083 | pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); | |
2084 | goto fail; | |
2085 | } | |
2086 | addr = page_address(tce_mem); | |
2087 | memset(addr, 0, tce32_segsz * segs); | |
2088 | ||
2089 | /* Configure HW */ | |
2090 | for (i = 0; i < segs; i++) { | |
2091 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
2092 | pe->pe_number, | |
2093 | base + i, 1, | |
2094 | __pa(addr) + tce32_segsz * i, | |
2095 | tce32_segsz, IOMMU_PAGE_SIZE_4K); | |
2096 | if (rc) { | |
2097 | pe_err(pe, " Failed to configure 32-bit TCE table," | |
2098 | " err %ld\n", rc); | |
2099 | goto fail; | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | /* Setup DMA32 segment mapping */ | |
2104 | for (i = base; i < base + segs; i++) | |
2105 | phb->ioda.dma32_segmap[i] = pe->pe_number; | |
2106 | ||
2107 | /* Setup linux iommu table */ | |
2108 | pnv_pci_setup_iommu_table(tbl, addr, tce32_segsz * segs, | |
2109 | base * PNV_IODA1_DMA32_SEGSIZE, | |
2110 | IOMMU_PAGE_SHIFT_4K); | |
2111 | ||
2112 | tbl->it_ops = &pnv_ioda1_iommu_ops; | |
2113 | pe->table_group.tce32_start = tbl->it_offset << tbl->it_page_shift; | |
2114 | pe->table_group.tce32_size = tbl->it_size << tbl->it_page_shift; | |
2115 | iommu_init_table(tbl, phb->hose->node); | |
2116 | ||
2117 | if (pe->flags & PNV_IODA_PE_DEV) { | |
2118 | /* | |
2119 | * Setting table base here only for carrying iommu_group | |
2120 | * further down to let iommu_add_device() do the job. | |
2121 | * pnv_pci_ioda_dma_dev_setup will override it later anyway. | |
2122 | */ | |
2123 | set_iommu_table_base(&pe->pdev->dev, tbl); | |
2124 | iommu_add_device(&pe->pdev->dev); | |
2125 | } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) | |
2126 | pnv_ioda_setup_bus_dma(pe, pe->pbus); | |
2127 | ||
2128 | return; | |
2129 | fail: | |
2130 | /* XXX Failure: Try to fallback to 64-bit only ? */ | |
2131 | if (tce_mem) | |
2132 | __free_pages(tce_mem, get_order(tce32_segsz * segs)); | |
2133 | if (tbl) { | |
2134 | pnv_pci_unlink_table_and_group(tbl, &pe->table_group); | |
2135 | iommu_free_table(tbl, "pnv"); | |
2136 | } | |
2137 | } | |
2138 | ||
2139 | static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group, | |
2140 | int num, struct iommu_table *tbl) | |
2141 | { | |
2142 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2143 | table_group); | |
2144 | struct pnv_phb *phb = pe->phb; | |
2145 | int64_t rc; | |
2146 | const unsigned long size = tbl->it_indirect_levels ? | |
2147 | tbl->it_level_size : tbl->it_size; | |
2148 | const __u64 start_addr = tbl->it_offset << tbl->it_page_shift; | |
2149 | const __u64 win_size = tbl->it_size << tbl->it_page_shift; | |
2150 | ||
2151 | pe_info(pe, "Setting up window#%d %llx..%llx pg=%x\n", num, | |
2152 | start_addr, start_addr + win_size - 1, | |
2153 | IOMMU_PAGE_SIZE(tbl)); | |
2154 | ||
2155 | /* | |
2156 | * Map TCE table through TVT. The TVE index is the PE number | |
2157 | * shifted by 1 bit for 32-bits DMA space. | |
2158 | */ | |
2159 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
2160 | pe->pe_number, | |
2161 | (pe->pe_number << 1) + num, | |
2162 | tbl->it_indirect_levels + 1, | |
2163 | __pa(tbl->it_base), | |
2164 | size << 3, | |
2165 | IOMMU_PAGE_SIZE(tbl)); | |
2166 | if (rc) { | |
2167 | pe_err(pe, "Failed to configure TCE table, err %ld\n", rc); | |
2168 | return rc; | |
2169 | } | |
2170 | ||
2171 | pnv_pci_link_table_and_group(phb->hose->node, num, | |
2172 | tbl, &pe->table_group); | |
2173 | pnv_pci_phb3_tce_invalidate_pe(pe); | |
2174 | ||
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable) | |
2179 | { | |
2180 | uint16_t window_id = (pe->pe_number << 1 ) + 1; | |
2181 | int64_t rc; | |
2182 | ||
2183 | pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); | |
2184 | if (enable) { | |
2185 | phys_addr_t top = memblock_end_of_DRAM(); | |
2186 | ||
2187 | top = roundup_pow_of_two(top); | |
2188 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
2189 | pe->pe_number, | |
2190 | window_id, | |
2191 | pe->tce_bypass_base, | |
2192 | top); | |
2193 | } else { | |
2194 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
2195 | pe->pe_number, | |
2196 | window_id, | |
2197 | pe->tce_bypass_base, | |
2198 | 0); | |
2199 | } | |
2200 | if (rc) | |
2201 | pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); | |
2202 | else | |
2203 | pe->tce_bypass_enabled = enable; | |
2204 | } | |
2205 | ||
2206 | static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset, | |
2207 | __u32 page_shift, __u64 window_size, __u32 levels, | |
2208 | struct iommu_table *tbl); | |
2209 | ||
2210 | static long pnv_pci_ioda2_create_table(struct iommu_table_group *table_group, | |
2211 | int num, __u32 page_shift, __u64 window_size, __u32 levels, | |
2212 | struct iommu_table **ptbl) | |
2213 | { | |
2214 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2215 | table_group); | |
2216 | int nid = pe->phb->hose->node; | |
2217 | __u64 bus_offset = num ? pe->tce_bypass_base : table_group->tce32_start; | |
2218 | long ret; | |
2219 | struct iommu_table *tbl; | |
2220 | ||
2221 | tbl = pnv_pci_table_alloc(nid); | |
2222 | if (!tbl) | |
2223 | return -ENOMEM; | |
2224 | ||
2225 | ret = pnv_pci_ioda2_table_alloc_pages(nid, | |
2226 | bus_offset, page_shift, window_size, | |
2227 | levels, tbl); | |
2228 | if (ret) { | |
2229 | iommu_free_table(tbl, "pnv"); | |
2230 | return ret; | |
2231 | } | |
2232 | ||
2233 | tbl->it_ops = &pnv_ioda2_iommu_ops; | |
2234 | ||
2235 | *ptbl = tbl; | |
2236 | ||
2237 | return 0; | |
2238 | } | |
2239 | ||
2240 | static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) | |
2241 | { | |
2242 | struct iommu_table *tbl = NULL; | |
2243 | long rc; | |
2244 | ||
2245 | /* | |
2246 | * crashkernel= specifies the kdump kernel's maximum memory at | |
2247 | * some offset and there is no guaranteed the result is a power | |
2248 | * of 2, which will cause errors later. | |
2249 | */ | |
2250 | const u64 max_memory = __rounddown_pow_of_two(memory_hotplug_max()); | |
2251 | ||
2252 | /* | |
2253 | * In memory constrained environments, e.g. kdump kernel, the | |
2254 | * DMA window can be larger than available memory, which will | |
2255 | * cause errors later. | |
2256 | */ | |
2257 | const u64 window_size = min((u64)pe->table_group.tce32_size, max_memory); | |
2258 | ||
2259 | rc = pnv_pci_ioda2_create_table(&pe->table_group, 0, | |
2260 | IOMMU_PAGE_SHIFT_4K, | |
2261 | window_size, | |
2262 | POWERNV_IOMMU_DEFAULT_LEVELS, &tbl); | |
2263 | if (rc) { | |
2264 | pe_err(pe, "Failed to create 32-bit TCE table, err %ld", | |
2265 | rc); | |
2266 | return rc; | |
2267 | } | |
2268 | ||
2269 | iommu_init_table(tbl, pe->phb->hose->node); | |
2270 | ||
2271 | rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl); | |
2272 | if (rc) { | |
2273 | pe_err(pe, "Failed to configure 32-bit TCE table, err %ld\n", | |
2274 | rc); | |
2275 | pnv_ioda2_table_free(tbl); | |
2276 | return rc; | |
2277 | } | |
2278 | ||
2279 | if (!pnv_iommu_bypass_disabled) | |
2280 | pnv_pci_ioda2_set_bypass(pe, true); | |
2281 | ||
2282 | /* | |
2283 | * Setting table base here only for carrying iommu_group | |
2284 | * further down to let iommu_add_device() do the job. | |
2285 | * pnv_pci_ioda_dma_dev_setup will override it later anyway. | |
2286 | */ | |
2287 | if (pe->flags & PNV_IODA_PE_DEV) | |
2288 | set_iommu_table_base(&pe->pdev->dev, tbl); | |
2289 | ||
2290 | return 0; | |
2291 | } | |
2292 | ||
2293 | #if defined(CONFIG_IOMMU_API) || defined(CONFIG_PCI_IOV) | |
2294 | static long pnv_pci_ioda2_unset_window(struct iommu_table_group *table_group, | |
2295 | int num) | |
2296 | { | |
2297 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2298 | table_group); | |
2299 | struct pnv_phb *phb = pe->phb; | |
2300 | long ret; | |
2301 | ||
2302 | pe_info(pe, "Removing DMA window #%d\n", num); | |
2303 | ||
2304 | ret = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, | |
2305 | (pe->pe_number << 1) + num, | |
2306 | 0/* levels */, 0/* table address */, | |
2307 | 0/* table size */, 0/* page size */); | |
2308 | if (ret) | |
2309 | pe_warn(pe, "Unmapping failed, ret = %ld\n", ret); | |
2310 | else | |
2311 | pnv_pci_phb3_tce_invalidate_pe(pe); | |
2312 | ||
2313 | pnv_pci_unlink_table_and_group(table_group->tables[num], table_group); | |
2314 | ||
2315 | return ret; | |
2316 | } | |
2317 | #endif | |
2318 | ||
2319 | #ifdef CONFIG_IOMMU_API | |
2320 | static unsigned long pnv_pci_ioda2_get_table_size(__u32 page_shift, | |
2321 | __u64 window_size, __u32 levels) | |
2322 | { | |
2323 | unsigned long bytes = 0; | |
2324 | const unsigned window_shift = ilog2(window_size); | |
2325 | unsigned entries_shift = window_shift - page_shift; | |
2326 | unsigned table_shift = entries_shift + 3; | |
2327 | unsigned long tce_table_size = max(0x1000UL, 1UL << table_shift); | |
2328 | unsigned long direct_table_size; | |
2329 | ||
2330 | if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS) || | |
2331 | (window_size > memory_hotplug_max()) || | |
2332 | !is_power_of_2(window_size)) | |
2333 | return 0; | |
2334 | ||
2335 | /* Calculate a direct table size from window_size and levels */ | |
2336 | entries_shift = (entries_shift + levels - 1) / levels; | |
2337 | table_shift = entries_shift + 3; | |
2338 | table_shift = max_t(unsigned, table_shift, PAGE_SHIFT); | |
2339 | direct_table_size = 1UL << table_shift; | |
2340 | ||
2341 | for ( ; levels; --levels) { | |
2342 | bytes += _ALIGN_UP(tce_table_size, direct_table_size); | |
2343 | ||
2344 | tce_table_size /= direct_table_size; | |
2345 | tce_table_size <<= 3; | |
2346 | tce_table_size = _ALIGN_UP(tce_table_size, direct_table_size); | |
2347 | } | |
2348 | ||
2349 | return bytes; | |
2350 | } | |
2351 | ||
2352 | static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group) | |
2353 | { | |
2354 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2355 | table_group); | |
2356 | /* Store @tbl as pnv_pci_ioda2_unset_window() resets it */ | |
2357 | struct iommu_table *tbl = pe->table_group.tables[0]; | |
2358 | ||
2359 | pnv_pci_ioda2_set_bypass(pe, false); | |
2360 | pnv_pci_ioda2_unset_window(&pe->table_group, 0); | |
2361 | pnv_ioda2_table_free(tbl); | |
2362 | } | |
2363 | ||
2364 | static void pnv_ioda2_release_ownership(struct iommu_table_group *table_group) | |
2365 | { | |
2366 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2367 | table_group); | |
2368 | ||
2369 | pnv_pci_ioda2_setup_default_config(pe); | |
2370 | } | |
2371 | ||
2372 | static struct iommu_table_group_ops pnv_pci_ioda2_ops = { | |
2373 | .get_table_size = pnv_pci_ioda2_get_table_size, | |
2374 | .create_table = pnv_pci_ioda2_create_table, | |
2375 | .set_window = pnv_pci_ioda2_set_window, | |
2376 | .unset_window = pnv_pci_ioda2_unset_window, | |
2377 | .take_ownership = pnv_ioda2_take_ownership, | |
2378 | .release_ownership = pnv_ioda2_release_ownership, | |
2379 | }; | |
2380 | ||
2381 | static int gpe_table_group_to_npe_cb(struct device *dev, void *opaque) | |
2382 | { | |
2383 | struct pci_controller *hose; | |
2384 | struct pnv_phb *phb; | |
2385 | struct pnv_ioda_pe **ptmppe = opaque; | |
2386 | struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); | |
2387 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
2388 | ||
2389 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
2390 | return 0; | |
2391 | ||
2392 | hose = pci_bus_to_host(pdev->bus); | |
2393 | phb = hose->private_data; | |
2394 | if (phb->type != PNV_PHB_NPU) | |
2395 | return 0; | |
2396 | ||
2397 | *ptmppe = &phb->ioda.pe_array[pdn->pe_number]; | |
2398 | ||
2399 | return 1; | |
2400 | } | |
2401 | ||
2402 | /* | |
2403 | * This returns PE of associated NPU. | |
2404 | * This assumes that NPU is in the same IOMMU group with GPU and there is | |
2405 | * no other PEs. | |
2406 | */ | |
2407 | static struct pnv_ioda_pe *gpe_table_group_to_npe( | |
2408 | struct iommu_table_group *table_group) | |
2409 | { | |
2410 | struct pnv_ioda_pe *npe = NULL; | |
2411 | int ret = iommu_group_for_each_dev(table_group->group, &npe, | |
2412 | gpe_table_group_to_npe_cb); | |
2413 | ||
2414 | BUG_ON(!ret || !npe); | |
2415 | ||
2416 | return npe; | |
2417 | } | |
2418 | ||
2419 | static long pnv_pci_ioda2_npu_set_window(struct iommu_table_group *table_group, | |
2420 | int num, struct iommu_table *tbl) | |
2421 | { | |
2422 | long ret = pnv_pci_ioda2_set_window(table_group, num, tbl); | |
2423 | ||
2424 | if (ret) | |
2425 | return ret; | |
2426 | ||
2427 | ret = pnv_npu_set_window(gpe_table_group_to_npe(table_group), num, tbl); | |
2428 | if (ret) | |
2429 | pnv_pci_ioda2_unset_window(table_group, num); | |
2430 | ||
2431 | return ret; | |
2432 | } | |
2433 | ||
2434 | static long pnv_pci_ioda2_npu_unset_window( | |
2435 | struct iommu_table_group *table_group, | |
2436 | int num) | |
2437 | { | |
2438 | long ret = pnv_pci_ioda2_unset_window(table_group, num); | |
2439 | ||
2440 | if (ret) | |
2441 | return ret; | |
2442 | ||
2443 | return pnv_npu_unset_window(gpe_table_group_to_npe(table_group), num); | |
2444 | } | |
2445 | ||
2446 | static void pnv_ioda2_npu_take_ownership(struct iommu_table_group *table_group) | |
2447 | { | |
2448 | /* | |
2449 | * Detach NPU first as pnv_ioda2_take_ownership() will destroy | |
2450 | * the iommu_table if 32bit DMA is enabled. | |
2451 | */ | |
2452 | pnv_npu_take_ownership(gpe_table_group_to_npe(table_group)); | |
2453 | pnv_ioda2_take_ownership(table_group); | |
2454 | } | |
2455 | ||
2456 | static struct iommu_table_group_ops pnv_pci_ioda2_npu_ops = { | |
2457 | .get_table_size = pnv_pci_ioda2_get_table_size, | |
2458 | .create_table = pnv_pci_ioda2_create_table, | |
2459 | .set_window = pnv_pci_ioda2_npu_set_window, | |
2460 | .unset_window = pnv_pci_ioda2_npu_unset_window, | |
2461 | .take_ownership = pnv_ioda2_npu_take_ownership, | |
2462 | .release_ownership = pnv_ioda2_release_ownership, | |
2463 | }; | |
2464 | ||
2465 | static void pnv_pci_ioda_setup_iommu_api(void) | |
2466 | { | |
2467 | struct pci_controller *hose, *tmp; | |
2468 | struct pnv_phb *phb; | |
2469 | struct pnv_ioda_pe *pe, *gpe; | |
2470 | ||
2471 | /* | |
2472 | * Now we have all PHBs discovered, time to add NPU devices to | |
2473 | * the corresponding IOMMU groups. | |
2474 | */ | |
2475 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
2476 | phb = hose->private_data; | |
2477 | ||
2478 | if (phb->type != PNV_PHB_NPU) | |
2479 | continue; | |
2480 | ||
2481 | list_for_each_entry(pe, &phb->ioda.pe_list, list) { | |
2482 | gpe = pnv_pci_npu_setup_iommu(pe); | |
2483 | if (gpe) | |
2484 | gpe->table_group.ops = &pnv_pci_ioda2_npu_ops; | |
2485 | } | |
2486 | } | |
2487 | } | |
2488 | #else /* !CONFIG_IOMMU_API */ | |
2489 | static void pnv_pci_ioda_setup_iommu_api(void) { }; | |
2490 | #endif | |
2491 | ||
2492 | static __be64 *pnv_pci_ioda2_table_do_alloc_pages(int nid, unsigned shift, | |
2493 | unsigned levels, unsigned long limit, | |
2494 | unsigned long *current_offset, unsigned long *total_allocated) | |
2495 | { | |
2496 | struct page *tce_mem = NULL; | |
2497 | __be64 *addr, *tmp; | |
2498 | unsigned order = max_t(unsigned, shift, PAGE_SHIFT) - PAGE_SHIFT; | |
2499 | unsigned long allocated = 1UL << (order + PAGE_SHIFT); | |
2500 | unsigned entries = 1UL << (shift - 3); | |
2501 | long i; | |
2502 | ||
2503 | tce_mem = alloc_pages_node(nid, GFP_KERNEL, order); | |
2504 | if (!tce_mem) { | |
2505 | pr_err("Failed to allocate a TCE memory, order=%d\n", order); | |
2506 | return NULL; | |
2507 | } | |
2508 | addr = page_address(tce_mem); | |
2509 | memset(addr, 0, allocated); | |
2510 | *total_allocated += allocated; | |
2511 | ||
2512 | --levels; | |
2513 | if (!levels) { | |
2514 | *current_offset += allocated; | |
2515 | return addr; | |
2516 | } | |
2517 | ||
2518 | for (i = 0; i < entries; ++i) { | |
2519 | tmp = pnv_pci_ioda2_table_do_alloc_pages(nid, shift, | |
2520 | levels, limit, current_offset, total_allocated); | |
2521 | if (!tmp) | |
2522 | break; | |
2523 | ||
2524 | addr[i] = cpu_to_be64(__pa(tmp) | | |
2525 | TCE_PCI_READ | TCE_PCI_WRITE); | |
2526 | ||
2527 | if (*current_offset >= limit) | |
2528 | break; | |
2529 | } | |
2530 | ||
2531 | return addr; | |
2532 | } | |
2533 | ||
2534 | static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr, | |
2535 | unsigned long size, unsigned level); | |
2536 | ||
2537 | static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset, | |
2538 | __u32 page_shift, __u64 window_size, __u32 levels, | |
2539 | struct iommu_table *tbl) | |
2540 | { | |
2541 | void *addr; | |
2542 | unsigned long offset = 0, level_shift, total_allocated = 0; | |
2543 | const unsigned window_shift = ilog2(window_size); | |
2544 | unsigned entries_shift = window_shift - page_shift; | |
2545 | unsigned table_shift = max_t(unsigned, entries_shift + 3, PAGE_SHIFT); | |
2546 | const unsigned long tce_table_size = 1UL << table_shift; | |
2547 | ||
2548 | if (!levels || (levels > POWERNV_IOMMU_MAX_LEVELS)) | |
2549 | return -EINVAL; | |
2550 | ||
2551 | if ((window_size > memory_hotplug_max()) || !is_power_of_2(window_size)) | |
2552 | return -EINVAL; | |
2553 | ||
2554 | /* Adjust direct table size from window_size and levels */ | |
2555 | entries_shift = (entries_shift + levels - 1) / levels; | |
2556 | level_shift = entries_shift + 3; | |
2557 | level_shift = max_t(unsigned, level_shift, PAGE_SHIFT); | |
2558 | ||
2559 | /* Allocate TCE table */ | |
2560 | addr = pnv_pci_ioda2_table_do_alloc_pages(nid, level_shift, | |
2561 | levels, tce_table_size, &offset, &total_allocated); | |
2562 | ||
2563 | /* addr==NULL means that the first level allocation failed */ | |
2564 | if (!addr) | |
2565 | return -ENOMEM; | |
2566 | ||
2567 | /* | |
2568 | * First level was allocated but some lower level failed as | |
2569 | * we did not allocate as much as we wanted, | |
2570 | * release partially allocated table. | |
2571 | */ | |
2572 | if (offset < tce_table_size) { | |
2573 | pnv_pci_ioda2_table_do_free_pages(addr, | |
2574 | 1ULL << (level_shift - 3), levels - 1); | |
2575 | return -ENOMEM; | |
2576 | } | |
2577 | ||
2578 | /* Setup linux iommu table */ | |
2579 | pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, bus_offset, | |
2580 | page_shift); | |
2581 | tbl->it_level_size = 1ULL << (level_shift - 3); | |
2582 | tbl->it_indirect_levels = levels - 1; | |
2583 | tbl->it_allocated_size = total_allocated; | |
2584 | ||
2585 | pr_devel("Created TCE table: ws=%08llx ts=%lx @%08llx\n", | |
2586 | window_size, tce_table_size, bus_offset); | |
2587 | ||
2588 | return 0; | |
2589 | } | |
2590 | ||
2591 | static void pnv_pci_ioda2_table_do_free_pages(__be64 *addr, | |
2592 | unsigned long size, unsigned level) | |
2593 | { | |
2594 | const unsigned long addr_ul = (unsigned long) addr & | |
2595 | ~(TCE_PCI_READ | TCE_PCI_WRITE); | |
2596 | ||
2597 | if (level) { | |
2598 | long i; | |
2599 | u64 *tmp = (u64 *) addr_ul; | |
2600 | ||
2601 | for (i = 0; i < size; ++i) { | |
2602 | unsigned long hpa = be64_to_cpu(tmp[i]); | |
2603 | ||
2604 | if (!(hpa & (TCE_PCI_READ | TCE_PCI_WRITE))) | |
2605 | continue; | |
2606 | ||
2607 | pnv_pci_ioda2_table_do_free_pages(__va(hpa), size, | |
2608 | level - 1); | |
2609 | } | |
2610 | } | |
2611 | ||
2612 | free_pages(addr_ul, get_order(size << 3)); | |
2613 | } | |
2614 | ||
2615 | static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl) | |
2616 | { | |
2617 | const unsigned long size = tbl->it_indirect_levels ? | |
2618 | tbl->it_level_size : tbl->it_size; | |
2619 | ||
2620 | if (!tbl->it_size) | |
2621 | return; | |
2622 | ||
2623 | pnv_pci_ioda2_table_do_free_pages((__be64 *)tbl->it_base, size, | |
2624 | tbl->it_indirect_levels); | |
2625 | } | |
2626 | ||
2627 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, | |
2628 | struct pnv_ioda_pe *pe) | |
2629 | { | |
2630 | int64_t rc; | |
2631 | ||
2632 | if (!pnv_pci_ioda_pe_dma_weight(pe)) | |
2633 | return; | |
2634 | ||
2635 | /* TVE #1 is selected by PCI address bit 59 */ | |
2636 | pe->tce_bypass_base = 1ull << 59; | |
2637 | ||
2638 | iommu_register_group(&pe->table_group, phb->hose->global_number, | |
2639 | pe->pe_number); | |
2640 | ||
2641 | /* The PE will reserve all possible 32-bits space */ | |
2642 | pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", | |
2643 | phb->ioda.m32_pci_base); | |
2644 | ||
2645 | /* Setup linux iommu table */ | |
2646 | pe->table_group.tce32_start = 0; | |
2647 | pe->table_group.tce32_size = phb->ioda.m32_pci_base; | |
2648 | pe->table_group.max_dynamic_windows_supported = | |
2649 | IOMMU_TABLE_GROUP_MAX_TABLES; | |
2650 | pe->table_group.max_levels = POWERNV_IOMMU_MAX_LEVELS; | |
2651 | pe->table_group.pgsizes = SZ_4K | SZ_64K | SZ_16M; | |
2652 | #ifdef CONFIG_IOMMU_API | |
2653 | pe->table_group.ops = &pnv_pci_ioda2_ops; | |
2654 | #endif | |
2655 | ||
2656 | rc = pnv_pci_ioda2_setup_default_config(pe); | |
2657 | if (rc) | |
2658 | return; | |
2659 | ||
2660 | if (pe->flags & PNV_IODA_PE_DEV) | |
2661 | iommu_add_device(&pe->pdev->dev); | |
2662 | else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) | |
2663 | pnv_ioda_setup_bus_dma(pe, pe->pbus); | |
2664 | } | |
2665 | ||
2666 | #ifdef CONFIG_PCI_MSI | |
2667 | static void pnv_ioda2_msi_eoi(struct irq_data *d) | |
2668 | { | |
2669 | unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); | |
2670 | struct irq_chip *chip = irq_data_get_irq_chip(d); | |
2671 | struct pnv_phb *phb = container_of(chip, struct pnv_phb, | |
2672 | ioda.irq_chip); | |
2673 | int64_t rc; | |
2674 | ||
2675 | rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); | |
2676 | WARN_ON_ONCE(rc); | |
2677 | ||
2678 | icp_native_eoi(d); | |
2679 | } | |
2680 | ||
2681 | ||
2682 | void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq) | |
2683 | { | |
2684 | struct irq_data *idata; | |
2685 | struct irq_chip *ichip; | |
2686 | ||
2687 | /* The MSI EOI OPAL call is only needed on PHB3 */ | |
2688 | if (phb->model != PNV_PHB_MODEL_PHB3) | |
2689 | return; | |
2690 | ||
2691 | if (!phb->ioda.irq_chip_init) { | |
2692 | /* | |
2693 | * First time we setup an MSI IRQ, we need to setup the | |
2694 | * corresponding IRQ chip to route correctly. | |
2695 | */ | |
2696 | idata = irq_get_irq_data(virq); | |
2697 | ichip = irq_data_get_irq_chip(idata); | |
2698 | phb->ioda.irq_chip_init = 1; | |
2699 | phb->ioda.irq_chip = *ichip; | |
2700 | phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; | |
2701 | } | |
2702 | irq_set_chip(virq, &phb->ioda.irq_chip); | |
2703 | } | |
2704 | ||
2705 | static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, | |
2706 | unsigned int hwirq, unsigned int virq, | |
2707 | unsigned int is_64, struct msi_msg *msg) | |
2708 | { | |
2709 | struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); | |
2710 | unsigned int xive_num = hwirq - phb->msi_base; | |
2711 | __be32 data; | |
2712 | int rc; | |
2713 | ||
2714 | /* No PE assigned ? bail out ... no MSI for you ! */ | |
2715 | if (pe == NULL) | |
2716 | return -ENXIO; | |
2717 | ||
2718 | /* Check if we have an MVE */ | |
2719 | if (pe->mve_number < 0) | |
2720 | return -ENXIO; | |
2721 | ||
2722 | /* Force 32-bit MSI on some broken devices */ | |
2723 | if (dev->no_64bit_msi) | |
2724 | is_64 = 0; | |
2725 | ||
2726 | /* Assign XIVE to PE */ | |
2727 | rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); | |
2728 | if (rc) { | |
2729 | pr_warn("%s: OPAL error %d setting XIVE %d PE\n", | |
2730 | pci_name(dev), rc, xive_num); | |
2731 | return -EIO; | |
2732 | } | |
2733 | ||
2734 | if (is_64) { | |
2735 | __be64 addr64; | |
2736 | ||
2737 | rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, | |
2738 | &addr64, &data); | |
2739 | if (rc) { | |
2740 | pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", | |
2741 | pci_name(dev), rc); | |
2742 | return -EIO; | |
2743 | } | |
2744 | msg->address_hi = be64_to_cpu(addr64) >> 32; | |
2745 | msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; | |
2746 | } else { | |
2747 | __be32 addr32; | |
2748 | ||
2749 | rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, | |
2750 | &addr32, &data); | |
2751 | if (rc) { | |
2752 | pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", | |
2753 | pci_name(dev), rc); | |
2754 | return -EIO; | |
2755 | } | |
2756 | msg->address_hi = 0; | |
2757 | msg->address_lo = be32_to_cpu(addr32); | |
2758 | } | |
2759 | msg->data = be32_to_cpu(data); | |
2760 | ||
2761 | pnv_set_msi_irq_chip(phb, virq); | |
2762 | ||
2763 | pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," | |
2764 | " address=%x_%08x data=%x PE# %d\n", | |
2765 | pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, | |
2766 | msg->address_hi, msg->address_lo, data, pe->pe_number); | |
2767 | ||
2768 | return 0; | |
2769 | } | |
2770 | ||
2771 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) | |
2772 | { | |
2773 | unsigned int count; | |
2774 | const __be32 *prop = of_get_property(phb->hose->dn, | |
2775 | "ibm,opal-msi-ranges", NULL); | |
2776 | if (!prop) { | |
2777 | /* BML Fallback */ | |
2778 | prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); | |
2779 | } | |
2780 | if (!prop) | |
2781 | return; | |
2782 | ||
2783 | phb->msi_base = be32_to_cpup(prop); | |
2784 | count = be32_to_cpup(prop + 1); | |
2785 | if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { | |
2786 | pr_err("PCI %d: Failed to allocate MSI bitmap !\n", | |
2787 | phb->hose->global_number); | |
2788 | return; | |
2789 | } | |
2790 | ||
2791 | phb->msi_setup = pnv_pci_ioda_msi_setup; | |
2792 | phb->msi32_support = 1; | |
2793 | pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", | |
2794 | count, phb->msi_base); | |
2795 | } | |
2796 | #else | |
2797 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } | |
2798 | #endif /* CONFIG_PCI_MSI */ | |
2799 | ||
2800 | #ifdef CONFIG_PCI_IOV | |
2801 | static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev) | |
2802 | { | |
2803 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
2804 | struct pnv_phb *phb = hose->private_data; | |
2805 | const resource_size_t gate = phb->ioda.m64_segsize >> 2; | |
2806 | struct resource *res; | |
2807 | int i; | |
2808 | resource_size_t size, total_vf_bar_sz; | |
2809 | struct pci_dn *pdn; | |
2810 | int mul, total_vfs; | |
2811 | ||
2812 | if (!pdev->is_physfn || pdev->is_added) | |
2813 | return; | |
2814 | ||
2815 | pdn = pci_get_pdn(pdev); | |
2816 | pdn->vfs_expanded = 0; | |
2817 | pdn->m64_single_mode = false; | |
2818 | ||
2819 | total_vfs = pci_sriov_get_totalvfs(pdev); | |
2820 | mul = phb->ioda.total_pe_num; | |
2821 | total_vf_bar_sz = 0; | |
2822 | ||
2823 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
2824 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
2825 | if (!res->flags || res->parent) | |
2826 | continue; | |
2827 | if (!pnv_pci_is_mem_pref_64(res->flags)) { | |
2828 | dev_warn(&pdev->dev, "Don't support SR-IOV with" | |
2829 | " non M64 VF BAR%d: %pR. \n", | |
2830 | i, res); | |
2831 | goto truncate_iov; | |
2832 | } | |
2833 | ||
2834 | total_vf_bar_sz += pci_iov_resource_size(pdev, | |
2835 | i + PCI_IOV_RESOURCES); | |
2836 | ||
2837 | /* | |
2838 | * If bigger than quarter of M64 segment size, just round up | |
2839 | * power of two. | |
2840 | * | |
2841 | * Generally, one M64 BAR maps one IOV BAR. To avoid conflict | |
2842 | * with other devices, IOV BAR size is expanded to be | |
2843 | * (total_pe * VF_BAR_size). When VF_BAR_size is half of M64 | |
2844 | * segment size , the expanded size would equal to half of the | |
2845 | * whole M64 space size, which will exhaust the M64 Space and | |
2846 | * limit the system flexibility. This is a design decision to | |
2847 | * set the boundary to quarter of the M64 segment size. | |
2848 | */ | |
2849 | if (total_vf_bar_sz > gate) { | |
2850 | mul = roundup_pow_of_two(total_vfs); | |
2851 | dev_info(&pdev->dev, | |
2852 | "VF BAR Total IOV size %llx > %llx, roundup to %d VFs\n", | |
2853 | total_vf_bar_sz, gate, mul); | |
2854 | pdn->m64_single_mode = true; | |
2855 | break; | |
2856 | } | |
2857 | } | |
2858 | ||
2859 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
2860 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
2861 | if (!res->flags || res->parent) | |
2862 | continue; | |
2863 | ||
2864 | size = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES); | |
2865 | /* | |
2866 | * On PHB3, the minimum size alignment of M64 BAR in single | |
2867 | * mode is 32MB. | |
2868 | */ | |
2869 | if (pdn->m64_single_mode && (size < SZ_32M)) | |
2870 | goto truncate_iov; | |
2871 | dev_dbg(&pdev->dev, " Fixing VF BAR%d: %pR to\n", i, res); | |
2872 | res->end = res->start + size * mul - 1; | |
2873 | dev_dbg(&pdev->dev, " %pR\n", res); | |
2874 | dev_info(&pdev->dev, "VF BAR%d: %pR (expanded to %d VFs for PE alignment)", | |
2875 | i, res, mul); | |
2876 | } | |
2877 | pdn->vfs_expanded = mul; | |
2878 | ||
2879 | return; | |
2880 | ||
2881 | truncate_iov: | |
2882 | /* To save MMIO space, IOV BAR is truncated. */ | |
2883 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
2884 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
2885 | res->flags = 0; | |
2886 | res->end = res->start - 1; | |
2887 | } | |
2888 | } | |
2889 | #endif /* CONFIG_PCI_IOV */ | |
2890 | ||
2891 | static void pnv_ioda_setup_pe_res(struct pnv_ioda_pe *pe, | |
2892 | struct resource *res) | |
2893 | { | |
2894 | struct pnv_phb *phb = pe->phb; | |
2895 | struct pci_bus_region region; | |
2896 | int index; | |
2897 | int64_t rc; | |
2898 | ||
2899 | if (!res || !res->flags || res->start > res->end) | |
2900 | return; | |
2901 | ||
2902 | if (res->flags & IORESOURCE_IO) { | |
2903 | region.start = res->start - phb->ioda.io_pci_base; | |
2904 | region.end = res->end - phb->ioda.io_pci_base; | |
2905 | index = region.start / phb->ioda.io_segsize; | |
2906 | ||
2907 | while (index < phb->ioda.total_pe_num && | |
2908 | region.start <= region.end) { | |
2909 | phb->ioda.io_segmap[index] = pe->pe_number; | |
2910 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
2911 | pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); | |
2912 | if (rc != OPAL_SUCCESS) { | |
2913 | pr_err("%s: Error %lld mapping IO segment#%d to PE#%d\n", | |
2914 | __func__, rc, index, pe->pe_number); | |
2915 | break; | |
2916 | } | |
2917 | ||
2918 | region.start += phb->ioda.io_segsize; | |
2919 | index++; | |
2920 | } | |
2921 | } else if ((res->flags & IORESOURCE_MEM) && | |
2922 | !pnv_pci_is_mem_pref_64(res->flags)) { | |
2923 | region.start = res->start - | |
2924 | phb->hose->mem_offset[0] - | |
2925 | phb->ioda.m32_pci_base; | |
2926 | region.end = res->end - | |
2927 | phb->hose->mem_offset[0] - | |
2928 | phb->ioda.m32_pci_base; | |
2929 | index = region.start / phb->ioda.m32_segsize; | |
2930 | ||
2931 | while (index < phb->ioda.total_pe_num && | |
2932 | region.start <= region.end) { | |
2933 | phb->ioda.m32_segmap[index] = pe->pe_number; | |
2934 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
2935 | pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); | |
2936 | if (rc != OPAL_SUCCESS) { | |
2937 | pr_err("%s: Error %lld mapping M32 segment#%d to PE#%d", | |
2938 | __func__, rc, index, pe->pe_number); | |
2939 | break; | |
2940 | } | |
2941 | ||
2942 | region.start += phb->ioda.m32_segsize; | |
2943 | index++; | |
2944 | } | |
2945 | } | |
2946 | } | |
2947 | ||
2948 | /* | |
2949 | * This function is supposed to be called on basis of PE from top | |
2950 | * to bottom style. So the the I/O or MMIO segment assigned to | |
2951 | * parent PE could be overrided by its child PEs if necessary. | |
2952 | */ | |
2953 | static void pnv_ioda_setup_pe_seg(struct pnv_ioda_pe *pe) | |
2954 | { | |
2955 | struct pci_dev *pdev; | |
2956 | int i; | |
2957 | ||
2958 | /* | |
2959 | * NOTE: We only care PCI bus based PE for now. For PCI | |
2960 | * device based PE, for example SRIOV sensitive VF should | |
2961 | * be figured out later. | |
2962 | */ | |
2963 | BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); | |
2964 | ||
2965 | list_for_each_entry(pdev, &pe->pbus->devices, bus_list) { | |
2966 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) | |
2967 | pnv_ioda_setup_pe_res(pe, &pdev->resource[i]); | |
2968 | ||
2969 | /* | |
2970 | * If the PE contains all subordinate PCI buses, the | |
2971 | * windows of the child bridges should be mapped to | |
2972 | * the PE as well. | |
2973 | */ | |
2974 | if (!(pe->flags & PNV_IODA_PE_BUS_ALL) || !pci_is_bridge(pdev)) | |
2975 | continue; | |
2976 | for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) | |
2977 | pnv_ioda_setup_pe_res(pe, | |
2978 | &pdev->resource[PCI_BRIDGE_RESOURCES + i]); | |
2979 | } | |
2980 | } | |
2981 | ||
2982 | static void pnv_pci_ioda_create_dbgfs(void) | |
2983 | { | |
2984 | #ifdef CONFIG_DEBUG_FS | |
2985 | struct pci_controller *hose, *tmp; | |
2986 | struct pnv_phb *phb; | |
2987 | char name[16]; | |
2988 | ||
2989 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
2990 | phb = hose->private_data; | |
2991 | ||
2992 | /* Notify initialization of PHB done */ | |
2993 | phb->initialized = 1; | |
2994 | ||
2995 | sprintf(name, "PCI%04x", hose->global_number); | |
2996 | phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); | |
2997 | if (!phb->dbgfs) | |
2998 | pr_warning("%s: Error on creating debugfs on PHB#%x\n", | |
2999 | __func__, hose->global_number); | |
3000 | } | |
3001 | #endif /* CONFIG_DEBUG_FS */ | |
3002 | } | |
3003 | ||
3004 | static void pnv_pci_ioda_fixup(void) | |
3005 | { | |
3006 | pnv_pci_ioda_setup_PEs(); | |
3007 | pnv_pci_ioda_setup_iommu_api(); | |
3008 | pnv_pci_ioda_create_dbgfs(); | |
3009 | ||
3010 | #ifdef CONFIG_EEH | |
3011 | eeh_init(); | |
3012 | eeh_addr_cache_build(); | |
3013 | #endif | |
3014 | } | |
3015 | ||
3016 | /* | |
3017 | * Returns the alignment for I/O or memory windows for P2P | |
3018 | * bridges. That actually depends on how PEs are segmented. | |
3019 | * For now, we return I/O or M32 segment size for PE sensitive | |
3020 | * P2P bridges. Otherwise, the default values (4KiB for I/O, | |
3021 | * 1MiB for memory) will be returned. | |
3022 | * | |
3023 | * The current PCI bus might be put into one PE, which was | |
3024 | * create against the parent PCI bridge. For that case, we | |
3025 | * needn't enlarge the alignment so that we can save some | |
3026 | * resources. | |
3027 | */ | |
3028 | static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, | |
3029 | unsigned long type) | |
3030 | { | |
3031 | struct pci_dev *bridge; | |
3032 | struct pci_controller *hose = pci_bus_to_host(bus); | |
3033 | struct pnv_phb *phb = hose->private_data; | |
3034 | int num_pci_bridges = 0; | |
3035 | ||
3036 | bridge = bus->self; | |
3037 | while (bridge) { | |
3038 | if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { | |
3039 | num_pci_bridges++; | |
3040 | if (num_pci_bridges >= 2) | |
3041 | return 1; | |
3042 | } | |
3043 | ||
3044 | bridge = bridge->bus->self; | |
3045 | } | |
3046 | ||
3047 | /* We fail back to M32 if M64 isn't supported */ | |
3048 | if (phb->ioda.m64_segsize && | |
3049 | pnv_pci_is_mem_pref_64(type)) | |
3050 | return phb->ioda.m64_segsize; | |
3051 | if (type & IORESOURCE_MEM) | |
3052 | return phb->ioda.m32_segsize; | |
3053 | ||
3054 | return phb->ioda.io_segsize; | |
3055 | } | |
3056 | ||
3057 | /* | |
3058 | * We are updating root port or the upstream port of the | |
3059 | * bridge behind the root port with PHB's windows in order | |
3060 | * to accommodate the changes on required resources during | |
3061 | * PCI (slot) hotplug, which is connected to either root | |
3062 | * port or the downstream ports of PCIe switch behind the | |
3063 | * root port. | |
3064 | */ | |
3065 | static void pnv_pci_fixup_bridge_resources(struct pci_bus *bus, | |
3066 | unsigned long type) | |
3067 | { | |
3068 | struct pci_controller *hose = pci_bus_to_host(bus); | |
3069 | struct pnv_phb *phb = hose->private_data; | |
3070 | struct pci_dev *bridge = bus->self; | |
3071 | struct resource *r, *w; | |
3072 | bool msi_region = false; | |
3073 | int i; | |
3074 | ||
3075 | /* Check if we need apply fixup to the bridge's windows */ | |
3076 | if (!pci_is_root_bus(bridge->bus) && | |
3077 | !pci_is_root_bus(bridge->bus->self->bus)) | |
3078 | return; | |
3079 | ||
3080 | /* Fixup the resources */ | |
3081 | for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { | |
3082 | r = &bridge->resource[PCI_BRIDGE_RESOURCES + i]; | |
3083 | if (!r->flags || !r->parent) | |
3084 | continue; | |
3085 | ||
3086 | w = NULL; | |
3087 | if (r->flags & type & IORESOURCE_IO) | |
3088 | w = &hose->io_resource; | |
3089 | else if (pnv_pci_is_mem_pref_64(r->flags) && | |
3090 | (type & IORESOURCE_PREFETCH) && | |
3091 | phb->ioda.m64_segsize) | |
3092 | w = &hose->mem_resources[1]; | |
3093 | else if (r->flags & type & IORESOURCE_MEM) { | |
3094 | w = &hose->mem_resources[0]; | |
3095 | msi_region = true; | |
3096 | } | |
3097 | ||
3098 | r->start = w->start; | |
3099 | r->end = w->end; | |
3100 | ||
3101 | /* The 64KB 32-bits MSI region shouldn't be included in | |
3102 | * the 32-bits bridge window. Otherwise, we can see strange | |
3103 | * issues. One of them is EEH error observed on Garrison. | |
3104 | * | |
3105 | * Exclude top 1MB region which is the minimal alignment of | |
3106 | * 32-bits bridge window. | |
3107 | */ | |
3108 | if (msi_region) { | |
3109 | r->end += 0x10000; | |
3110 | r->end -= 0x100000; | |
3111 | } | |
3112 | } | |
3113 | } | |
3114 | ||
3115 | static void pnv_pci_setup_bridge(struct pci_bus *bus, unsigned long type) | |
3116 | { | |
3117 | struct pci_controller *hose = pci_bus_to_host(bus); | |
3118 | struct pnv_phb *phb = hose->private_data; | |
3119 | struct pci_dev *bridge = bus->self; | |
3120 | struct pnv_ioda_pe *pe; | |
3121 | bool all = (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE); | |
3122 | ||
3123 | /* Extend bridge's windows if necessary */ | |
3124 | pnv_pci_fixup_bridge_resources(bus, type); | |
3125 | ||
3126 | /* The PE for root bus should be realized before any one else */ | |
3127 | if (!phb->ioda.root_pe_populated) { | |
3128 | pe = pnv_ioda_setup_bus_PE(phb->hose->bus, false); | |
3129 | if (pe) { | |
3130 | phb->ioda.root_pe_idx = pe->pe_number; | |
3131 | phb->ioda.root_pe_populated = true; | |
3132 | } | |
3133 | } | |
3134 | ||
3135 | /* Don't assign PE to PCI bus, which doesn't have subordinate devices */ | |
3136 | if (list_empty(&bus->devices)) | |
3137 | return; | |
3138 | ||
3139 | /* Reserve PEs according to used M64 resources */ | |
3140 | if (phb->reserve_m64_pe) | |
3141 | phb->reserve_m64_pe(bus, NULL, all); | |
3142 | ||
3143 | /* | |
3144 | * Assign PE. We might run here because of partial hotplug. | |
3145 | * For the case, we just pick up the existing PE and should | |
3146 | * not allocate resources again. | |
3147 | */ | |
3148 | pe = pnv_ioda_setup_bus_PE(bus, all); | |
3149 | if (!pe) | |
3150 | return; | |
3151 | ||
3152 | pnv_ioda_setup_pe_seg(pe); | |
3153 | switch (phb->type) { | |
3154 | case PNV_PHB_IODA1: | |
3155 | pnv_pci_ioda1_setup_dma_pe(phb, pe); | |
3156 | break; | |
3157 | case PNV_PHB_IODA2: | |
3158 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
3159 | break; | |
3160 | default: | |
3161 | pr_warn("%s: No DMA for PHB#%d (type %d)\n", | |
3162 | __func__, phb->hose->global_number, phb->type); | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | #ifdef CONFIG_PCI_IOV | |
3167 | static resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev, | |
3168 | int resno) | |
3169 | { | |
3170 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
3171 | struct pnv_phb *phb = hose->private_data; | |
3172 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
3173 | resource_size_t align; | |
3174 | ||
3175 | /* | |
3176 | * On PowerNV platform, IOV BAR is mapped by M64 BAR to enable the | |
3177 | * SR-IOV. While from hardware perspective, the range mapped by M64 | |
3178 | * BAR should be size aligned. | |
3179 | * | |
3180 | * When IOV BAR is mapped with M64 BAR in Single PE mode, the extra | |
3181 | * powernv-specific hardware restriction is gone. But if just use the | |
3182 | * VF BAR size as the alignment, PF BAR / VF BAR may be allocated with | |
3183 | * in one segment of M64 #15, which introduces the PE conflict between | |
3184 | * PF and VF. Based on this, the minimum alignment of an IOV BAR is | |
3185 | * m64_segsize. | |
3186 | * | |
3187 | * This function returns the total IOV BAR size if M64 BAR is in | |
3188 | * Shared PE mode or just VF BAR size if not. | |
3189 | * If the M64 BAR is in Single PE mode, return the VF BAR size or | |
3190 | * M64 segment size if IOV BAR size is less. | |
3191 | */ | |
3192 | align = pci_iov_resource_size(pdev, resno); | |
3193 | if (!pdn->vfs_expanded) | |
3194 | return align; | |
3195 | if (pdn->m64_single_mode) | |
3196 | return max(align, (resource_size_t)phb->ioda.m64_segsize); | |
3197 | ||
3198 | return pdn->vfs_expanded * align; | |
3199 | } | |
3200 | #endif /* CONFIG_PCI_IOV */ | |
3201 | ||
3202 | /* Prevent enabling devices for which we couldn't properly | |
3203 | * assign a PE | |
3204 | */ | |
3205 | bool pnv_pci_enable_device_hook(struct pci_dev *dev) | |
3206 | { | |
3207 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
3208 | struct pnv_phb *phb = hose->private_data; | |
3209 | struct pci_dn *pdn; | |
3210 | ||
3211 | /* The function is probably called while the PEs have | |
3212 | * not be created yet. For example, resource reassignment | |
3213 | * during PCI probe period. We just skip the check if | |
3214 | * PEs isn't ready. | |
3215 | */ | |
3216 | if (!phb->initialized) | |
3217 | return true; | |
3218 | ||
3219 | pdn = pci_get_pdn(dev); | |
3220 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
3221 | return false; | |
3222 | ||
3223 | return true; | |
3224 | } | |
3225 | ||
3226 | static long pnv_pci_ioda1_unset_window(struct iommu_table_group *table_group, | |
3227 | int num) | |
3228 | { | |
3229 | struct pnv_ioda_pe *pe = container_of(table_group, | |
3230 | struct pnv_ioda_pe, table_group); | |
3231 | struct pnv_phb *phb = pe->phb; | |
3232 | unsigned int idx; | |
3233 | long rc; | |
3234 | ||
3235 | pe_info(pe, "Removing DMA window #%d\n", num); | |
3236 | for (idx = 0; idx < phb->ioda.dma32_count; idx++) { | |
3237 | if (phb->ioda.dma32_segmap[idx] != pe->pe_number) | |
3238 | continue; | |
3239 | ||
3240 | rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, | |
3241 | idx, 0, 0ul, 0ul, 0ul); | |
3242 | if (rc != OPAL_SUCCESS) { | |
3243 | pe_warn(pe, "Failure %ld unmapping DMA32 segment#%d\n", | |
3244 | rc, idx); | |
3245 | return rc; | |
3246 | } | |
3247 | ||
3248 | phb->ioda.dma32_segmap[idx] = IODA_INVALID_PE; | |
3249 | } | |
3250 | ||
3251 | pnv_pci_unlink_table_and_group(table_group->tables[num], table_group); | |
3252 | return OPAL_SUCCESS; | |
3253 | } | |
3254 | ||
3255 | static void pnv_pci_ioda1_release_pe_dma(struct pnv_ioda_pe *pe) | |
3256 | { | |
3257 | unsigned int weight = pnv_pci_ioda_pe_dma_weight(pe); | |
3258 | struct iommu_table *tbl = pe->table_group.tables[0]; | |
3259 | int64_t rc; | |
3260 | ||
3261 | if (!weight) | |
3262 | return; | |
3263 | ||
3264 | rc = pnv_pci_ioda1_unset_window(&pe->table_group, 0); | |
3265 | if (rc != OPAL_SUCCESS) | |
3266 | return; | |
3267 | ||
3268 | pnv_pci_p7ioc_tce_invalidate(tbl, tbl->it_offset, tbl->it_size, false); | |
3269 | if (pe->table_group.group) { | |
3270 | iommu_group_put(pe->table_group.group); | |
3271 | WARN_ON(pe->table_group.group); | |
3272 | } | |
3273 | ||
3274 | free_pages(tbl->it_base, get_order(tbl->it_size << 3)); | |
3275 | iommu_free_table(tbl, "pnv"); | |
3276 | } | |
3277 | ||
3278 | static void pnv_pci_ioda2_release_pe_dma(struct pnv_ioda_pe *pe) | |
3279 | { | |
3280 | struct iommu_table *tbl = pe->table_group.tables[0]; | |
3281 | unsigned int weight = pnv_pci_ioda_pe_dma_weight(pe); | |
3282 | #ifdef CONFIG_IOMMU_API | |
3283 | int64_t rc; | |
3284 | #endif | |
3285 | ||
3286 | if (!weight) | |
3287 | return; | |
3288 | ||
3289 | #ifdef CONFIG_IOMMU_API | |
3290 | rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0); | |
3291 | if (rc) | |
3292 | pe_warn(pe, "OPAL error %ld release DMA window\n", rc); | |
3293 | #endif | |
3294 | ||
3295 | pnv_pci_ioda2_set_bypass(pe, false); | |
3296 | if (pe->table_group.group) { | |
3297 | iommu_group_put(pe->table_group.group); | |
3298 | WARN_ON(pe->table_group.group); | |
3299 | } | |
3300 | ||
3301 | pnv_pci_ioda2_table_free_pages(tbl); | |
3302 | iommu_free_table(tbl, "pnv"); | |
3303 | } | |
3304 | ||
3305 | static void pnv_ioda_free_pe_seg(struct pnv_ioda_pe *pe, | |
3306 | unsigned short win, | |
3307 | unsigned int *map) | |
3308 | { | |
3309 | struct pnv_phb *phb = pe->phb; | |
3310 | int idx; | |
3311 | int64_t rc; | |
3312 | ||
3313 | for (idx = 0; idx < phb->ioda.total_pe_num; idx++) { | |
3314 | if (map[idx] != pe->pe_number) | |
3315 | continue; | |
3316 | ||
3317 | if (win == OPAL_M64_WINDOW_TYPE) | |
3318 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
3319 | phb->ioda.reserved_pe_idx, win, | |
3320 | idx / PNV_IODA1_M64_SEGS, | |
3321 | idx % PNV_IODA1_M64_SEGS); | |
3322 | else | |
3323 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
3324 | phb->ioda.reserved_pe_idx, win, 0, idx); | |
3325 | ||
3326 | if (rc != OPAL_SUCCESS) | |
3327 | pe_warn(pe, "Error %ld unmapping (%d) segment#%d\n", | |
3328 | rc, win, idx); | |
3329 | ||
3330 | map[idx] = IODA_INVALID_PE; | |
3331 | } | |
3332 | } | |
3333 | ||
3334 | static void pnv_ioda_release_pe_seg(struct pnv_ioda_pe *pe) | |
3335 | { | |
3336 | struct pnv_phb *phb = pe->phb; | |
3337 | ||
3338 | if (phb->type == PNV_PHB_IODA1) { | |
3339 | pnv_ioda_free_pe_seg(pe, OPAL_IO_WINDOW_TYPE, | |
3340 | phb->ioda.io_segmap); | |
3341 | pnv_ioda_free_pe_seg(pe, OPAL_M32_WINDOW_TYPE, | |
3342 | phb->ioda.m32_segmap); | |
3343 | pnv_ioda_free_pe_seg(pe, OPAL_M64_WINDOW_TYPE, | |
3344 | phb->ioda.m64_segmap); | |
3345 | } else if (phb->type == PNV_PHB_IODA2) { | |
3346 | pnv_ioda_free_pe_seg(pe, OPAL_M32_WINDOW_TYPE, | |
3347 | phb->ioda.m32_segmap); | |
3348 | } | |
3349 | } | |
3350 | ||
3351 | static void pnv_ioda_release_pe(struct pnv_ioda_pe *pe) | |
3352 | { | |
3353 | struct pnv_phb *phb = pe->phb; | |
3354 | struct pnv_ioda_pe *slave, *tmp; | |
3355 | ||
3356 | /* Release slave PEs in compound PE */ | |
3357 | if (pe->flags & PNV_IODA_PE_MASTER) { | |
3358 | list_for_each_entry_safe(slave, tmp, &pe->slaves, list) | |
3359 | pnv_ioda_release_pe(slave); | |
3360 | } | |
3361 | ||
3362 | list_del(&pe->list); | |
3363 | switch (phb->type) { | |
3364 | case PNV_PHB_IODA1: | |
3365 | pnv_pci_ioda1_release_pe_dma(pe); | |
3366 | break; | |
3367 | case PNV_PHB_IODA2: | |
3368 | pnv_pci_ioda2_release_pe_dma(pe); | |
3369 | break; | |
3370 | default: | |
3371 | WARN_ON(1); | |
3372 | } | |
3373 | ||
3374 | pnv_ioda_release_pe_seg(pe); | |
3375 | pnv_ioda_deconfigure_pe(pe->phb, pe); | |
3376 | pnv_ioda_free_pe(pe); | |
3377 | } | |
3378 | ||
3379 | static void pnv_pci_release_device(struct pci_dev *pdev) | |
3380 | { | |
3381 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
3382 | struct pnv_phb *phb = hose->private_data; | |
3383 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
3384 | struct pnv_ioda_pe *pe; | |
3385 | ||
3386 | if (pdev->is_virtfn) | |
3387 | return; | |
3388 | ||
3389 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
3390 | return; | |
3391 | ||
3392 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
3393 | WARN_ON(--pe->device_count < 0); | |
3394 | if (pe->device_count == 0) | |
3395 | pnv_ioda_release_pe(pe); | |
3396 | } | |
3397 | ||
3398 | static void pnv_pci_ioda_shutdown(struct pci_controller *hose) | |
3399 | { | |
3400 | struct pnv_phb *phb = hose->private_data; | |
3401 | ||
3402 | opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE, | |
3403 | OPAL_ASSERT_RESET); | |
3404 | } | |
3405 | ||
3406 | static const struct pci_controller_ops pnv_pci_ioda_controller_ops = { | |
3407 | .dma_dev_setup = pnv_pci_dma_dev_setup, | |
3408 | .dma_bus_setup = pnv_pci_dma_bus_setup, | |
3409 | #ifdef CONFIG_PCI_MSI | |
3410 | .setup_msi_irqs = pnv_setup_msi_irqs, | |
3411 | .teardown_msi_irqs = pnv_teardown_msi_irqs, | |
3412 | #endif | |
3413 | .enable_device_hook = pnv_pci_enable_device_hook, | |
3414 | .release_device = pnv_pci_release_device, | |
3415 | .window_alignment = pnv_pci_window_alignment, | |
3416 | .setup_bridge = pnv_pci_setup_bridge, | |
3417 | .reset_secondary_bus = pnv_pci_reset_secondary_bus, | |
3418 | .dma_set_mask = pnv_pci_ioda_dma_set_mask, | |
3419 | .dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask, | |
3420 | .shutdown = pnv_pci_ioda_shutdown, | |
3421 | }; | |
3422 | ||
3423 | static int pnv_npu_dma_set_mask(struct pci_dev *npdev, u64 dma_mask) | |
3424 | { | |
3425 | dev_err_once(&npdev->dev, | |
3426 | "%s operation unsupported for NVLink devices\n", | |
3427 | __func__); | |
3428 | return -EPERM; | |
3429 | } | |
3430 | ||
3431 | static const struct pci_controller_ops pnv_npu_ioda_controller_ops = { | |
3432 | .dma_dev_setup = pnv_pci_dma_dev_setup, | |
3433 | #ifdef CONFIG_PCI_MSI | |
3434 | .setup_msi_irqs = pnv_setup_msi_irqs, | |
3435 | .teardown_msi_irqs = pnv_teardown_msi_irqs, | |
3436 | #endif | |
3437 | .enable_device_hook = pnv_pci_enable_device_hook, | |
3438 | .window_alignment = pnv_pci_window_alignment, | |
3439 | .reset_secondary_bus = pnv_pci_reset_secondary_bus, | |
3440 | .dma_set_mask = pnv_npu_dma_set_mask, | |
3441 | .shutdown = pnv_pci_ioda_shutdown, | |
3442 | }; | |
3443 | ||
3444 | #ifdef CONFIG_CXL_BASE | |
3445 | const struct pci_controller_ops pnv_cxl_cx4_ioda_controller_ops = { | |
3446 | .dma_dev_setup = pnv_pci_dma_dev_setup, | |
3447 | .dma_bus_setup = pnv_pci_dma_bus_setup, | |
3448 | #ifdef CONFIG_PCI_MSI | |
3449 | .setup_msi_irqs = pnv_cxl_cx4_setup_msi_irqs, | |
3450 | .teardown_msi_irqs = pnv_cxl_cx4_teardown_msi_irqs, | |
3451 | #endif | |
3452 | .enable_device_hook = pnv_cxl_enable_device_hook, | |
3453 | .disable_device = pnv_cxl_disable_device, | |
3454 | .release_device = pnv_pci_release_device, | |
3455 | .window_alignment = pnv_pci_window_alignment, | |
3456 | .setup_bridge = pnv_pci_setup_bridge, | |
3457 | .reset_secondary_bus = pnv_pci_reset_secondary_bus, | |
3458 | .dma_set_mask = pnv_pci_ioda_dma_set_mask, | |
3459 | .dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask, | |
3460 | .shutdown = pnv_pci_ioda_shutdown, | |
3461 | }; | |
3462 | #endif | |
3463 | ||
3464 | static void __init pnv_pci_init_ioda_phb(struct device_node *np, | |
3465 | u64 hub_id, int ioda_type) | |
3466 | { | |
3467 | struct pci_controller *hose; | |
3468 | struct pnv_phb *phb; | |
3469 | unsigned long size, m64map_off, m32map_off, pemap_off; | |
3470 | unsigned long iomap_off = 0, dma32map_off = 0; | |
3471 | struct resource r; | |
3472 | const __be64 *prop64; | |
3473 | const __be32 *prop32; | |
3474 | int len; | |
3475 | unsigned int segno; | |
3476 | u64 phb_id; | |
3477 | void *aux; | |
3478 | long rc; | |
3479 | ||
3480 | pr_info("Initializing %s PHB (%s)\n", | |
3481 | pnv_phb_names[ioda_type], of_node_full_name(np)); | |
3482 | ||
3483 | prop64 = of_get_property(np, "ibm,opal-phbid", NULL); | |
3484 | if (!prop64) { | |
3485 | pr_err(" Missing \"ibm,opal-phbid\" property !\n"); | |
3486 | return; | |
3487 | } | |
3488 | phb_id = be64_to_cpup(prop64); | |
3489 | pr_debug(" PHB-ID : 0x%016llx\n", phb_id); | |
3490 | ||
3491 | phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0); | |
3492 | ||
3493 | /* Allocate PCI controller */ | |
3494 | phb->hose = hose = pcibios_alloc_controller(np); | |
3495 | if (!phb->hose) { | |
3496 | pr_err(" Can't allocate PCI controller for %s\n", | |
3497 | np->full_name); | |
3498 | memblock_free(__pa(phb), sizeof(struct pnv_phb)); | |
3499 | return; | |
3500 | } | |
3501 | ||
3502 | spin_lock_init(&phb->lock); | |
3503 | prop32 = of_get_property(np, "bus-range", &len); | |
3504 | if (prop32 && len == 8) { | |
3505 | hose->first_busno = be32_to_cpu(prop32[0]); | |
3506 | hose->last_busno = be32_to_cpu(prop32[1]); | |
3507 | } else { | |
3508 | pr_warn(" Broken <bus-range> on %s\n", np->full_name); | |
3509 | hose->first_busno = 0; | |
3510 | hose->last_busno = 0xff; | |
3511 | } | |
3512 | hose->private_data = phb; | |
3513 | phb->hub_id = hub_id; | |
3514 | phb->opal_id = phb_id; | |
3515 | phb->type = ioda_type; | |
3516 | mutex_init(&phb->ioda.pe_alloc_mutex); | |
3517 | ||
3518 | /* Detect specific models for error handling */ | |
3519 | if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) | |
3520 | phb->model = PNV_PHB_MODEL_P7IOC; | |
3521 | else if (of_device_is_compatible(np, "ibm,power8-pciex")) | |
3522 | phb->model = PNV_PHB_MODEL_PHB3; | |
3523 | else if (of_device_is_compatible(np, "ibm,power8-npu-pciex")) | |
3524 | phb->model = PNV_PHB_MODEL_NPU; | |
3525 | else | |
3526 | phb->model = PNV_PHB_MODEL_UNKNOWN; | |
3527 | ||
3528 | /* Parse 32-bit and IO ranges (if any) */ | |
3529 | pci_process_bridge_OF_ranges(hose, np, !hose->global_number); | |
3530 | ||
3531 | /* Get registers */ | |
3532 | if (!of_address_to_resource(np, 0, &r)) { | |
3533 | phb->regs_phys = r.start; | |
3534 | phb->regs = ioremap(r.start, resource_size(&r)); | |
3535 | if (phb->regs == NULL) | |
3536 | pr_err(" Failed to map registers !\n"); | |
3537 | } | |
3538 | ||
3539 | /* Initialize more IODA stuff */ | |
3540 | phb->ioda.total_pe_num = 1; | |
3541 | prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); | |
3542 | if (prop32) | |
3543 | phb->ioda.total_pe_num = be32_to_cpup(prop32); | |
3544 | prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); | |
3545 | if (prop32) | |
3546 | phb->ioda.reserved_pe_idx = be32_to_cpup(prop32); | |
3547 | ||
3548 | /* Invalidate RID to PE# mapping */ | |
3549 | for (segno = 0; segno < ARRAY_SIZE(phb->ioda.pe_rmap); segno++) | |
3550 | phb->ioda.pe_rmap[segno] = IODA_INVALID_PE; | |
3551 | ||
3552 | /* Parse 64-bit MMIO range */ | |
3553 | pnv_ioda_parse_m64_window(phb); | |
3554 | ||
3555 | phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); | |
3556 | /* FW Has already off top 64k of M32 space (MSI space) */ | |
3557 | phb->ioda.m32_size += 0x10000; | |
3558 | ||
3559 | phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe_num; | |
3560 | phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; | |
3561 | phb->ioda.io_size = hose->pci_io_size; | |
3562 | phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe_num; | |
3563 | phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ | |
3564 | ||
3565 | /* Calculate how many 32-bit TCE segments we have */ | |
3566 | phb->ioda.dma32_count = phb->ioda.m32_pci_base / | |
3567 | PNV_IODA1_DMA32_SEGSIZE; | |
3568 | ||
3569 | /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ | |
3570 | size = _ALIGN_UP(max_t(unsigned, phb->ioda.total_pe_num, 8) / 8, | |
3571 | sizeof(unsigned long)); | |
3572 | m64map_off = size; | |
3573 | size += phb->ioda.total_pe_num * sizeof(phb->ioda.m64_segmap[0]); | |
3574 | m32map_off = size; | |
3575 | size += phb->ioda.total_pe_num * sizeof(phb->ioda.m32_segmap[0]); | |
3576 | if (phb->type == PNV_PHB_IODA1) { | |
3577 | iomap_off = size; | |
3578 | size += phb->ioda.total_pe_num * sizeof(phb->ioda.io_segmap[0]); | |
3579 | dma32map_off = size; | |
3580 | size += phb->ioda.dma32_count * | |
3581 | sizeof(phb->ioda.dma32_segmap[0]); | |
3582 | } | |
3583 | pemap_off = size; | |
3584 | size += phb->ioda.total_pe_num * sizeof(struct pnv_ioda_pe); | |
3585 | aux = memblock_virt_alloc(size, 0); | |
3586 | phb->ioda.pe_alloc = aux; | |
3587 | phb->ioda.m64_segmap = aux + m64map_off; | |
3588 | phb->ioda.m32_segmap = aux + m32map_off; | |
3589 | for (segno = 0; segno < phb->ioda.total_pe_num; segno++) { | |
3590 | phb->ioda.m64_segmap[segno] = IODA_INVALID_PE; | |
3591 | phb->ioda.m32_segmap[segno] = IODA_INVALID_PE; | |
3592 | } | |
3593 | if (phb->type == PNV_PHB_IODA1) { | |
3594 | phb->ioda.io_segmap = aux + iomap_off; | |
3595 | for (segno = 0; segno < phb->ioda.total_pe_num; segno++) | |
3596 | phb->ioda.io_segmap[segno] = IODA_INVALID_PE; | |
3597 | ||
3598 | phb->ioda.dma32_segmap = aux + dma32map_off; | |
3599 | for (segno = 0; segno < phb->ioda.dma32_count; segno++) | |
3600 | phb->ioda.dma32_segmap[segno] = IODA_INVALID_PE; | |
3601 | } | |
3602 | phb->ioda.pe_array = aux + pemap_off; | |
3603 | ||
3604 | /* | |
3605 | * Choose PE number for root bus, which shouldn't have | |
3606 | * M64 resources consumed by its child devices. To pick | |
3607 | * the PE number adjacent to the reserved one if possible. | |
3608 | */ | |
3609 | pnv_ioda_reserve_pe(phb, phb->ioda.reserved_pe_idx); | |
3610 | if (phb->ioda.reserved_pe_idx == 0) { | |
3611 | phb->ioda.root_pe_idx = 1; | |
3612 | pnv_ioda_reserve_pe(phb, phb->ioda.root_pe_idx); | |
3613 | } else if (phb->ioda.reserved_pe_idx == (phb->ioda.total_pe_num - 1)) { | |
3614 | phb->ioda.root_pe_idx = phb->ioda.reserved_pe_idx - 1; | |
3615 | pnv_ioda_reserve_pe(phb, phb->ioda.root_pe_idx); | |
3616 | } else { | |
3617 | phb->ioda.root_pe_idx = IODA_INVALID_PE; | |
3618 | } | |
3619 | ||
3620 | INIT_LIST_HEAD(&phb->ioda.pe_list); | |
3621 | mutex_init(&phb->ioda.pe_list_mutex); | |
3622 | ||
3623 | /* Calculate how many 32-bit TCE segments we have */ | |
3624 | phb->ioda.dma32_count = phb->ioda.m32_pci_base / | |
3625 | PNV_IODA1_DMA32_SEGSIZE; | |
3626 | ||
3627 | #if 0 /* We should really do that ... */ | |
3628 | rc = opal_pci_set_phb_mem_window(opal->phb_id, | |
3629 | window_type, | |
3630 | window_num, | |
3631 | starting_real_address, | |
3632 | starting_pci_address, | |
3633 | segment_size); | |
3634 | #endif | |
3635 | ||
3636 | pr_info(" %03d (%03d) PE's M32: 0x%x [segment=0x%x]\n", | |
3637 | phb->ioda.total_pe_num, phb->ioda.reserved_pe_idx, | |
3638 | phb->ioda.m32_size, phb->ioda.m32_segsize); | |
3639 | if (phb->ioda.m64_size) | |
3640 | pr_info(" M64: 0x%lx [segment=0x%lx]\n", | |
3641 | phb->ioda.m64_size, phb->ioda.m64_segsize); | |
3642 | if (phb->ioda.io_size) | |
3643 | pr_info(" IO: 0x%x [segment=0x%x]\n", | |
3644 | phb->ioda.io_size, phb->ioda.io_segsize); | |
3645 | ||
3646 | ||
3647 | phb->hose->ops = &pnv_pci_ops; | |
3648 | phb->get_pe_state = pnv_ioda_get_pe_state; | |
3649 | phb->freeze_pe = pnv_ioda_freeze_pe; | |
3650 | phb->unfreeze_pe = pnv_ioda_unfreeze_pe; | |
3651 | ||
3652 | /* Setup MSI support */ | |
3653 | pnv_pci_init_ioda_msis(phb); | |
3654 | ||
3655 | /* | |
3656 | * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here | |
3657 | * to let the PCI core do resource assignment. It's supposed | |
3658 | * that the PCI core will do correct I/O and MMIO alignment | |
3659 | * for the P2P bridge bars so that each PCI bus (excluding | |
3660 | * the child P2P bridges) can form individual PE. | |
3661 | */ | |
3662 | ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; | |
3663 | ||
3664 | if (phb->type == PNV_PHB_NPU) { | |
3665 | hose->controller_ops = pnv_npu_ioda_controller_ops; | |
3666 | } else { | |
3667 | phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; | |
3668 | hose->controller_ops = pnv_pci_ioda_controller_ops; | |
3669 | } | |
3670 | ||
3671 | #ifdef CONFIG_PCI_IOV | |
3672 | ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources; | |
3673 | ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment; | |
3674 | #endif | |
3675 | ||
3676 | pci_add_flags(PCI_REASSIGN_ALL_RSRC); | |
3677 | ||
3678 | /* Reset IODA tables to a clean state */ | |
3679 | rc = opal_pci_reset(phb_id, OPAL_RESET_PCI_IODA_TABLE, OPAL_ASSERT_RESET); | |
3680 | if (rc) | |
3681 | pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); | |
3682 | ||
3683 | /* If we're running in kdump kerenl, the previous kerenl never | |
3684 | * shutdown PCI devices correctly. We already got IODA table | |
3685 | * cleaned out. So we have to issue PHB reset to stop all PCI | |
3686 | * transactions from previous kerenl. | |
3687 | */ | |
3688 | if (is_kdump_kernel()) { | |
3689 | pr_info(" Issue PHB reset ...\n"); | |
3690 | pnv_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); | |
3691 | pnv_eeh_phb_reset(hose, EEH_RESET_DEACTIVATE); | |
3692 | } | |
3693 | ||
3694 | /* Remove M64 resource if we can't configure it successfully */ | |
3695 | if (!phb->init_m64 || phb->init_m64(phb)) | |
3696 | hose->mem_resources[1].flags = 0; | |
3697 | } | |
3698 | ||
3699 | void __init pnv_pci_init_ioda2_phb(struct device_node *np) | |
3700 | { | |
3701 | pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); | |
3702 | } | |
3703 | ||
3704 | void __init pnv_pci_init_npu_phb(struct device_node *np) | |
3705 | { | |
3706 | pnv_pci_init_ioda_phb(np, 0, PNV_PHB_NPU); | |
3707 | } | |
3708 | ||
3709 | void __init pnv_pci_init_ioda_hub(struct device_node *np) | |
3710 | { | |
3711 | struct device_node *phbn; | |
3712 | const __be64 *prop64; | |
3713 | u64 hub_id; | |
3714 | ||
3715 | pr_info("Probing IODA IO-Hub %s\n", np->full_name); | |
3716 | ||
3717 | prop64 = of_get_property(np, "ibm,opal-hubid", NULL); | |
3718 | if (!prop64) { | |
3719 | pr_err(" Missing \"ibm,opal-hubid\" property !\n"); | |
3720 | return; | |
3721 | } | |
3722 | hub_id = be64_to_cpup(prop64); | |
3723 | pr_devel(" HUB-ID : 0x%016llx\n", hub_id); | |
3724 | ||
3725 | /* Count child PHBs */ | |
3726 | for_each_child_of_node(np, phbn) { | |
3727 | /* Look for IODA1 PHBs */ | |
3728 | if (of_device_is_compatible(phbn, "ibm,ioda-phb")) | |
3729 | pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); | |
3730 | } | |
3731 | } |