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184cd4a3 BH |
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 | ||
cee72d5b | 12 | #undef DEBUG |
184cd4a3 BH |
13 | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/pci.h> | |
361f2a2a | 16 | #include <linux/crash_dump.h> |
37c367f2 | 17 | #include <linux/debugfs.h> |
184cd4a3 BH |
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> | |
cd15b048 | 25 | #include <linux/memblock.h> |
ac9a5889 | 26 | #include <linux/iommu.h> |
e57080f1 | 27 | #include <linux/rculist.h> |
184cd4a3 BH |
28 | |
29 | #include <asm/sections.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/prom.h> | |
32 | #include <asm/pci-bridge.h> | |
33 | #include <asm/machdep.h> | |
fb1b55d6 | 34 | #include <asm/msi_bitmap.h> |
184cd4a3 BH |
35 | #include <asm/ppc-pci.h> |
36 | #include <asm/opal.h> | |
37 | #include <asm/iommu.h> | |
38 | #include <asm/tce.h> | |
137436c9 | 39 | #include <asm/xics.h> |
37c367f2 | 40 | #include <asm/debug.h> |
262af557 | 41 | #include <asm/firmware.h> |
80c49c7e | 42 | #include <asm/pnv-pci.h> |
aca6913f | 43 | #include <asm/mmzone.h> |
80c49c7e | 44 | |
ec249dd8 | 45 | #include <misc/cxl-base.h> |
184cd4a3 BH |
46 | |
47 | #include "powernv.h" | |
48 | #include "pci.h" | |
49 | ||
781a868f WY |
50 | /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ |
51 | #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) | |
52 | ||
aca6913f AK |
53 | static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl); |
54 | ||
6d31c2fa JP |
55 | static void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, |
56 | const char *fmt, ...) | |
57 | { | |
58 | struct va_format vaf; | |
59 | va_list args; | |
60 | char pfix[32]; | |
61 | ||
62 | va_start(args, fmt); | |
63 | ||
64 | vaf.fmt = fmt; | |
65 | vaf.va = &args; | |
66 | ||
781a868f | 67 | if (pe->flags & PNV_IODA_PE_DEV) |
6d31c2fa | 68 | strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix)); |
781a868f | 69 | else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) |
6d31c2fa JP |
70 | sprintf(pfix, "%04x:%02x ", |
71 | pci_domain_nr(pe->pbus), pe->pbus->number); | |
781a868f WY |
72 | #ifdef CONFIG_PCI_IOV |
73 | else if (pe->flags & PNV_IODA_PE_VF) | |
74 | sprintf(pfix, "%04x:%02x:%2x.%d", | |
75 | pci_domain_nr(pe->parent_dev->bus), | |
76 | (pe->rid & 0xff00) >> 8, | |
77 | PCI_SLOT(pe->rid), PCI_FUNC(pe->rid)); | |
78 | #endif /* CONFIG_PCI_IOV*/ | |
6d31c2fa JP |
79 | |
80 | printk("%spci %s: [PE# %.3d] %pV", | |
81 | level, pfix, pe->pe_number, &vaf); | |
82 | ||
83 | va_end(args); | |
84 | } | |
184cd4a3 | 85 | |
6d31c2fa JP |
86 | #define pe_err(pe, fmt, ...) \ |
87 | pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__) | |
88 | #define pe_warn(pe, fmt, ...) \ | |
89 | pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__) | |
90 | #define pe_info(pe, fmt, ...) \ | |
91 | pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__) | |
184cd4a3 | 92 | |
4e287840 TLSC |
93 | static bool pnv_iommu_bypass_disabled __read_mostly; |
94 | ||
95 | static int __init iommu_setup(char *str) | |
96 | { | |
97 | if (!str) | |
98 | return -EINVAL; | |
99 | ||
100 | while (*str) { | |
101 | if (!strncmp(str, "nobypass", 8)) { | |
102 | pnv_iommu_bypass_disabled = true; | |
103 | pr_info("PowerNV: IOMMU bypass window disabled.\n"); | |
104 | break; | |
105 | } | |
106 | str += strcspn(str, ","); | |
107 | if (*str == ',') | |
108 | str++; | |
109 | } | |
110 | ||
111 | return 0; | |
112 | } | |
113 | early_param("iommu", iommu_setup); | |
114 | ||
8e0a1611 AK |
115 | /* |
116 | * stdcix is only supposed to be used in hypervisor real mode as per | |
117 | * the architecture spec | |
118 | */ | |
119 | static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr) | |
120 | { | |
121 | __asm__ __volatile__("stdcix %0,0,%1" | |
122 | : : "r" (val), "r" (paddr) : "memory"); | |
123 | } | |
124 | ||
262af557 GC |
125 | static inline bool pnv_pci_is_mem_pref_64(unsigned long flags) |
126 | { | |
127 | return ((flags & (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)) == | |
128 | (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)); | |
129 | } | |
130 | ||
4b82ab18 GS |
131 | static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no) |
132 | { | |
133 | if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe)) { | |
134 | pr_warn("%s: Invalid PE %d on PHB#%x\n", | |
135 | __func__, pe_no, phb->hose->global_number); | |
136 | return; | |
137 | } | |
138 | ||
139 | if (test_and_set_bit(pe_no, phb->ioda.pe_alloc)) { | |
140 | pr_warn("%s: PE %d was assigned on PHB#%x\n", | |
141 | __func__, pe_no, phb->hose->global_number); | |
142 | return; | |
143 | } | |
144 | ||
145 | phb->ioda.pe_array[pe_no].phb = phb; | |
146 | phb->ioda.pe_array[pe_no].pe_number = pe_no; | |
147 | } | |
148 | ||
cad5cef6 | 149 | static int pnv_ioda_alloc_pe(struct pnv_phb *phb) |
184cd4a3 BH |
150 | { |
151 | unsigned long pe; | |
152 | ||
153 | do { | |
154 | pe = find_next_zero_bit(phb->ioda.pe_alloc, | |
155 | phb->ioda.total_pe, 0); | |
156 | if (pe >= phb->ioda.total_pe) | |
157 | return IODA_INVALID_PE; | |
158 | } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); | |
159 | ||
4cce9550 | 160 | phb->ioda.pe_array[pe].phb = phb; |
184cd4a3 BH |
161 | phb->ioda.pe_array[pe].pe_number = pe; |
162 | return pe; | |
163 | } | |
164 | ||
cad5cef6 | 165 | static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe) |
184cd4a3 BH |
166 | { |
167 | WARN_ON(phb->ioda.pe_array[pe].pdev); | |
168 | ||
169 | memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); | |
170 | clear_bit(pe, phb->ioda.pe_alloc); | |
171 | } | |
172 | ||
262af557 GC |
173 | /* The default M64 BAR is shared by all PEs */ |
174 | static int pnv_ioda2_init_m64(struct pnv_phb *phb) | |
175 | { | |
176 | const char *desc; | |
177 | struct resource *r; | |
178 | s64 rc; | |
179 | ||
180 | /* Configure the default M64 BAR */ | |
181 | rc = opal_pci_set_phb_mem_window(phb->opal_id, | |
182 | OPAL_M64_WINDOW_TYPE, | |
183 | phb->ioda.m64_bar_idx, | |
184 | phb->ioda.m64_base, | |
185 | 0, /* unused */ | |
186 | phb->ioda.m64_size); | |
187 | if (rc != OPAL_SUCCESS) { | |
188 | desc = "configuring"; | |
189 | goto fail; | |
190 | } | |
191 | ||
192 | /* Enable the default M64 BAR */ | |
193 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
194 | OPAL_M64_WINDOW_TYPE, | |
195 | phb->ioda.m64_bar_idx, | |
196 | OPAL_ENABLE_M64_SPLIT); | |
197 | if (rc != OPAL_SUCCESS) { | |
198 | desc = "enabling"; | |
199 | goto fail; | |
200 | } | |
201 | ||
202 | /* Mark the M64 BAR assigned */ | |
203 | set_bit(phb->ioda.m64_bar_idx, &phb->ioda.m64_bar_alloc); | |
204 | ||
205 | /* | |
206 | * Strip off the segment used by the reserved PE, which is | |
207 | * expected to be 0 or last one of PE capabicity. | |
208 | */ | |
209 | r = &phb->hose->mem_resources[1]; | |
210 | if (phb->ioda.reserved_pe == 0) | |
211 | r->start += phb->ioda.m64_segsize; | |
212 | else if (phb->ioda.reserved_pe == (phb->ioda.total_pe - 1)) | |
213 | r->end -= phb->ioda.m64_segsize; | |
214 | else | |
215 | pr_warn(" Cannot strip M64 segment for reserved PE#%d\n", | |
216 | phb->ioda.reserved_pe); | |
217 | ||
218 | return 0; | |
219 | ||
220 | fail: | |
221 | pr_warn(" Failure %lld %s M64 BAR#%d\n", | |
222 | rc, desc, phb->ioda.m64_bar_idx); | |
223 | opal_pci_phb_mmio_enable(phb->opal_id, | |
224 | OPAL_M64_WINDOW_TYPE, | |
225 | phb->ioda.m64_bar_idx, | |
226 | OPAL_DISABLE_M64); | |
227 | return -EIO; | |
228 | } | |
229 | ||
5ef73567 | 230 | static void pnv_ioda2_reserve_m64_pe(struct pnv_phb *phb) |
262af557 GC |
231 | { |
232 | resource_size_t sgsz = phb->ioda.m64_segsize; | |
233 | struct pci_dev *pdev; | |
234 | struct resource *r; | |
235 | int base, step, i; | |
236 | ||
237 | /* | |
238 | * Root bus always has full M64 range and root port has | |
239 | * M64 range used in reality. So we're checking root port | |
240 | * instead of root bus. | |
241 | */ | |
242 | list_for_each_entry(pdev, &phb->hose->bus->devices, bus_list) { | |
4b82ab18 GS |
243 | for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { |
244 | r = &pdev->resource[PCI_BRIDGE_RESOURCES + i]; | |
262af557 GC |
245 | if (!r->parent || |
246 | !pnv_pci_is_mem_pref_64(r->flags)) | |
247 | continue; | |
248 | ||
249 | base = (r->start - phb->ioda.m64_base) / sgsz; | |
250 | for (step = 0; step < resource_size(r) / sgsz; step++) | |
4b82ab18 | 251 | pnv_ioda_reserve_pe(phb, base + step); |
262af557 GC |
252 | } |
253 | } | |
254 | } | |
255 | ||
256 | static int pnv_ioda2_pick_m64_pe(struct pnv_phb *phb, | |
257 | struct pci_bus *bus, int all) | |
258 | { | |
259 | resource_size_t segsz = phb->ioda.m64_segsize; | |
260 | struct pci_dev *pdev; | |
261 | struct resource *r; | |
262 | struct pnv_ioda_pe *master_pe, *pe; | |
263 | unsigned long size, *pe_alloc; | |
264 | bool found; | |
265 | int start, i, j; | |
266 | ||
267 | /* Root bus shouldn't use M64 */ | |
268 | if (pci_is_root_bus(bus)) | |
269 | return IODA_INVALID_PE; | |
270 | ||
271 | /* We support only one M64 window on each bus */ | |
272 | found = false; | |
273 | pci_bus_for_each_resource(bus, r, i) { | |
274 | if (r && r->parent && | |
275 | pnv_pci_is_mem_pref_64(r->flags)) { | |
276 | found = true; | |
277 | break; | |
278 | } | |
279 | } | |
280 | ||
281 | /* No M64 window found ? */ | |
282 | if (!found) | |
283 | return IODA_INVALID_PE; | |
284 | ||
285 | /* Allocate bitmap */ | |
286 | size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); | |
287 | pe_alloc = kzalloc(size, GFP_KERNEL); | |
288 | if (!pe_alloc) { | |
289 | pr_warn("%s: Out of memory !\n", | |
290 | __func__); | |
291 | return IODA_INVALID_PE; | |
292 | } | |
293 | ||
294 | /* | |
295 | * Figure out reserved PE numbers by the PE | |
296 | * the its child PEs. | |
297 | */ | |
298 | start = (r->start - phb->ioda.m64_base) / segsz; | |
299 | for (i = 0; i < resource_size(r) / segsz; i++) | |
300 | set_bit(start + i, pe_alloc); | |
301 | ||
302 | if (all) | |
303 | goto done; | |
304 | ||
305 | /* | |
306 | * If the PE doesn't cover all subordinate buses, | |
307 | * we need subtract from reserved PEs for children. | |
308 | */ | |
309 | list_for_each_entry(pdev, &bus->devices, bus_list) { | |
310 | if (!pdev->subordinate) | |
311 | continue; | |
312 | ||
313 | pci_bus_for_each_resource(pdev->subordinate, r, i) { | |
314 | if (!r || !r->parent || | |
315 | !pnv_pci_is_mem_pref_64(r->flags)) | |
316 | continue; | |
317 | ||
318 | start = (r->start - phb->ioda.m64_base) / segsz; | |
319 | for (j = 0; j < resource_size(r) / segsz ; j++) | |
320 | clear_bit(start + j, pe_alloc); | |
321 | } | |
322 | } | |
323 | ||
324 | /* | |
325 | * the current bus might not own M64 window and that's all | |
326 | * contributed by its child buses. For the case, we needn't | |
327 | * pick M64 dependent PE#. | |
328 | */ | |
329 | if (bitmap_empty(pe_alloc, phb->ioda.total_pe)) { | |
330 | kfree(pe_alloc); | |
331 | return IODA_INVALID_PE; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Figure out the master PE and put all slave PEs to master | |
336 | * PE's list to form compound PE. | |
337 | */ | |
338 | done: | |
339 | master_pe = NULL; | |
340 | i = -1; | |
341 | while ((i = find_next_bit(pe_alloc, phb->ioda.total_pe, i + 1)) < | |
342 | phb->ioda.total_pe) { | |
343 | pe = &phb->ioda.pe_array[i]; | |
262af557 GC |
344 | |
345 | if (!master_pe) { | |
346 | pe->flags |= PNV_IODA_PE_MASTER; | |
347 | INIT_LIST_HEAD(&pe->slaves); | |
348 | master_pe = pe; | |
349 | } else { | |
350 | pe->flags |= PNV_IODA_PE_SLAVE; | |
351 | pe->master = master_pe; | |
352 | list_add_tail(&pe->list, &master_pe->slaves); | |
353 | } | |
354 | } | |
355 | ||
356 | kfree(pe_alloc); | |
357 | return master_pe->pe_number; | |
358 | } | |
359 | ||
360 | static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb) | |
361 | { | |
362 | struct pci_controller *hose = phb->hose; | |
363 | struct device_node *dn = hose->dn; | |
364 | struct resource *res; | |
365 | const u32 *r; | |
366 | u64 pci_addr; | |
367 | ||
1665c4a8 GS |
368 | /* FIXME: Support M64 for P7IOC */ |
369 | if (phb->type != PNV_PHB_IODA2) { | |
370 | pr_info(" Not support M64 window\n"); | |
371 | return; | |
372 | } | |
373 | ||
262af557 GC |
374 | if (!firmware_has_feature(FW_FEATURE_OPALv3)) { |
375 | pr_info(" Firmware too old to support M64 window\n"); | |
376 | return; | |
377 | } | |
378 | ||
379 | r = of_get_property(dn, "ibm,opal-m64-window", NULL); | |
380 | if (!r) { | |
381 | pr_info(" No <ibm,opal-m64-window> on %s\n", | |
382 | dn->full_name); | |
383 | return; | |
384 | } | |
385 | ||
262af557 GC |
386 | res = &hose->mem_resources[1]; |
387 | res->start = of_translate_address(dn, r + 2); | |
388 | res->end = res->start + of_read_number(r + 4, 2) - 1; | |
389 | res->flags = (IORESOURCE_MEM | IORESOURCE_MEM_64 | IORESOURCE_PREFETCH); | |
390 | pci_addr = of_read_number(r, 2); | |
391 | hose->mem_offset[1] = res->start - pci_addr; | |
392 | ||
393 | phb->ioda.m64_size = resource_size(res); | |
394 | phb->ioda.m64_segsize = phb->ioda.m64_size / phb->ioda.total_pe; | |
395 | phb->ioda.m64_base = pci_addr; | |
396 | ||
e9863e68 WY |
397 | pr_info(" MEM64 0x%016llx..0x%016llx -> 0x%016llx\n", |
398 | res->start, res->end, pci_addr); | |
399 | ||
262af557 GC |
400 | /* Use last M64 BAR to cover M64 window */ |
401 | phb->ioda.m64_bar_idx = 15; | |
402 | phb->init_m64 = pnv_ioda2_init_m64; | |
5ef73567 | 403 | phb->reserve_m64_pe = pnv_ioda2_reserve_m64_pe; |
262af557 GC |
404 | phb->pick_m64_pe = pnv_ioda2_pick_m64_pe; |
405 | } | |
406 | ||
49dec922 GS |
407 | static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int pe_no) |
408 | { | |
409 | struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_no]; | |
410 | struct pnv_ioda_pe *slave; | |
411 | s64 rc; | |
412 | ||
413 | /* Fetch master PE */ | |
414 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
415 | pe = pe->master; | |
ec8e4e9d GS |
416 | if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER))) |
417 | return; | |
418 | ||
49dec922 GS |
419 | pe_no = pe->pe_number; |
420 | } | |
421 | ||
422 | /* Freeze master PE */ | |
423 | rc = opal_pci_eeh_freeze_set(phb->opal_id, | |
424 | pe_no, | |
425 | OPAL_EEH_ACTION_SET_FREEZE_ALL); | |
426 | if (rc != OPAL_SUCCESS) { | |
427 | pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", | |
428 | __func__, rc, phb->hose->global_number, pe_no); | |
429 | return; | |
430 | } | |
431 | ||
432 | /* Freeze slave PEs */ | |
433 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
434 | return; | |
435 | ||
436 | list_for_each_entry(slave, &pe->slaves, list) { | |
437 | rc = opal_pci_eeh_freeze_set(phb->opal_id, | |
438 | slave->pe_number, | |
439 | OPAL_EEH_ACTION_SET_FREEZE_ALL); | |
440 | if (rc != OPAL_SUCCESS) | |
441 | pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", | |
442 | __func__, rc, phb->hose->global_number, | |
443 | slave->pe_number); | |
444 | } | |
445 | } | |
446 | ||
e51df2c1 | 447 | static int pnv_ioda_unfreeze_pe(struct pnv_phb *phb, int pe_no, int opt) |
49dec922 GS |
448 | { |
449 | struct pnv_ioda_pe *pe, *slave; | |
450 | s64 rc; | |
451 | ||
452 | /* Find master PE */ | |
453 | pe = &phb->ioda.pe_array[pe_no]; | |
454 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
455 | pe = pe->master; | |
456 | WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); | |
457 | pe_no = pe->pe_number; | |
458 | } | |
459 | ||
460 | /* Clear frozen state for master PE */ | |
461 | rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, opt); | |
462 | if (rc != OPAL_SUCCESS) { | |
463 | pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", | |
464 | __func__, rc, opt, phb->hose->global_number, pe_no); | |
465 | return -EIO; | |
466 | } | |
467 | ||
468 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
469 | return 0; | |
470 | ||
471 | /* Clear frozen state for slave PEs */ | |
472 | list_for_each_entry(slave, &pe->slaves, list) { | |
473 | rc = opal_pci_eeh_freeze_clear(phb->opal_id, | |
474 | slave->pe_number, | |
475 | opt); | |
476 | if (rc != OPAL_SUCCESS) { | |
477 | pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", | |
478 | __func__, rc, opt, phb->hose->global_number, | |
479 | slave->pe_number); | |
480 | return -EIO; | |
481 | } | |
482 | } | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no) | |
488 | { | |
489 | struct pnv_ioda_pe *slave, *pe; | |
490 | u8 fstate, state; | |
491 | __be16 pcierr; | |
492 | s64 rc; | |
493 | ||
494 | /* Sanity check on PE number */ | |
495 | if (pe_no < 0 || pe_no >= phb->ioda.total_pe) | |
496 | return OPAL_EEH_STOPPED_PERM_UNAVAIL; | |
497 | ||
498 | /* | |
499 | * Fetch the master PE and the PE instance might be | |
500 | * not initialized yet. | |
501 | */ | |
502 | pe = &phb->ioda.pe_array[pe_no]; | |
503 | if (pe->flags & PNV_IODA_PE_SLAVE) { | |
504 | pe = pe->master; | |
505 | WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); | |
506 | pe_no = pe->pe_number; | |
507 | } | |
508 | ||
509 | /* Check the master PE */ | |
510 | rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, | |
511 | &state, &pcierr, NULL); | |
512 | if (rc != OPAL_SUCCESS) { | |
513 | pr_warn("%s: Failure %lld getting " | |
514 | "PHB#%x-PE#%x state\n", | |
515 | __func__, rc, | |
516 | phb->hose->global_number, pe_no); | |
517 | return OPAL_EEH_STOPPED_TEMP_UNAVAIL; | |
518 | } | |
519 | ||
520 | /* Check the slave PE */ | |
521 | if (!(pe->flags & PNV_IODA_PE_MASTER)) | |
522 | return state; | |
523 | ||
524 | list_for_each_entry(slave, &pe->slaves, list) { | |
525 | rc = opal_pci_eeh_freeze_status(phb->opal_id, | |
526 | slave->pe_number, | |
527 | &fstate, | |
528 | &pcierr, | |
529 | NULL); | |
530 | if (rc != OPAL_SUCCESS) { | |
531 | pr_warn("%s: Failure %lld getting " | |
532 | "PHB#%x-PE#%x state\n", | |
533 | __func__, rc, | |
534 | phb->hose->global_number, slave->pe_number); | |
535 | return OPAL_EEH_STOPPED_TEMP_UNAVAIL; | |
536 | } | |
537 | ||
538 | /* | |
539 | * Override the result based on the ascending | |
540 | * priority. | |
541 | */ | |
542 | if (fstate > state) | |
543 | state = fstate; | |
544 | } | |
545 | ||
546 | return state; | |
547 | } | |
548 | ||
184cd4a3 BH |
549 | /* Currently those 2 are only used when MSIs are enabled, this will change |
550 | * but in the meantime, we need to protect them to avoid warnings | |
551 | */ | |
552 | #ifdef CONFIG_PCI_MSI | |
cad5cef6 | 553 | static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) |
184cd4a3 BH |
554 | { |
555 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
556 | struct pnv_phb *phb = hose->private_data; | |
b72c1f65 | 557 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
558 | |
559 | if (!pdn) | |
560 | return NULL; | |
561 | if (pdn->pe_number == IODA_INVALID_PE) | |
562 | return NULL; | |
563 | return &phb->ioda.pe_array[pdn->pe_number]; | |
564 | } | |
184cd4a3 BH |
565 | #endif /* CONFIG_PCI_MSI */ |
566 | ||
b131a842 GS |
567 | static int pnv_ioda_set_one_peltv(struct pnv_phb *phb, |
568 | struct pnv_ioda_pe *parent, | |
569 | struct pnv_ioda_pe *child, | |
570 | bool is_add) | |
571 | { | |
572 | const char *desc = is_add ? "adding" : "removing"; | |
573 | uint8_t op = is_add ? OPAL_ADD_PE_TO_DOMAIN : | |
574 | OPAL_REMOVE_PE_FROM_DOMAIN; | |
575 | struct pnv_ioda_pe *slave; | |
576 | long rc; | |
577 | ||
578 | /* Parent PE affects child PE */ | |
579 | rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, | |
580 | child->pe_number, op); | |
581 | if (rc != OPAL_SUCCESS) { | |
582 | pe_warn(child, "OPAL error %ld %s to parent PELTV\n", | |
583 | rc, desc); | |
584 | return -ENXIO; | |
585 | } | |
586 | ||
587 | if (!(child->flags & PNV_IODA_PE_MASTER)) | |
588 | return 0; | |
589 | ||
590 | /* Compound case: parent PE affects slave PEs */ | |
591 | list_for_each_entry(slave, &child->slaves, list) { | |
592 | rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, | |
593 | slave->pe_number, op); | |
594 | if (rc != OPAL_SUCCESS) { | |
595 | pe_warn(slave, "OPAL error %ld %s to parent PELTV\n", | |
596 | rc, desc); | |
597 | return -ENXIO; | |
598 | } | |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | static int pnv_ioda_set_peltv(struct pnv_phb *phb, | |
605 | struct pnv_ioda_pe *pe, | |
606 | bool is_add) | |
607 | { | |
608 | struct pnv_ioda_pe *slave; | |
781a868f | 609 | struct pci_dev *pdev = NULL; |
b131a842 GS |
610 | int ret; |
611 | ||
612 | /* | |
613 | * Clear PE frozen state. If it's master PE, we need | |
614 | * clear slave PE frozen state as well. | |
615 | */ | |
616 | if (is_add) { | |
617 | opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, | |
618 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
619 | if (pe->flags & PNV_IODA_PE_MASTER) { | |
620 | list_for_each_entry(slave, &pe->slaves, list) | |
621 | opal_pci_eeh_freeze_clear(phb->opal_id, | |
622 | slave->pe_number, | |
623 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
624 | } | |
625 | } | |
626 | ||
627 | /* | |
628 | * Associate PE in PELT. We need add the PE into the | |
629 | * corresponding PELT-V as well. Otherwise, the error | |
630 | * originated from the PE might contribute to other | |
631 | * PEs. | |
632 | */ | |
633 | ret = pnv_ioda_set_one_peltv(phb, pe, pe, is_add); | |
634 | if (ret) | |
635 | return ret; | |
636 | ||
637 | /* For compound PEs, any one affects all of them */ | |
638 | if (pe->flags & PNV_IODA_PE_MASTER) { | |
639 | list_for_each_entry(slave, &pe->slaves, list) { | |
640 | ret = pnv_ioda_set_one_peltv(phb, slave, pe, is_add); | |
641 | if (ret) | |
642 | return ret; | |
643 | } | |
644 | } | |
645 | ||
646 | if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS)) | |
647 | pdev = pe->pbus->self; | |
781a868f | 648 | else if (pe->flags & PNV_IODA_PE_DEV) |
b131a842 | 649 | pdev = pe->pdev->bus->self; |
781a868f WY |
650 | #ifdef CONFIG_PCI_IOV |
651 | else if (pe->flags & PNV_IODA_PE_VF) | |
652 | pdev = pe->parent_dev->bus->self; | |
653 | #endif /* CONFIG_PCI_IOV */ | |
b131a842 GS |
654 | while (pdev) { |
655 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
656 | struct pnv_ioda_pe *parent; | |
657 | ||
658 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { | |
659 | parent = &phb->ioda.pe_array[pdn->pe_number]; | |
660 | ret = pnv_ioda_set_one_peltv(phb, parent, pe, is_add); | |
661 | if (ret) | |
662 | return ret; | |
663 | } | |
664 | ||
665 | pdev = pdev->bus->self; | |
666 | } | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
781a868f WY |
671 | #ifdef CONFIG_PCI_IOV |
672 | static int pnv_ioda_deconfigure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) | |
673 | { | |
674 | struct pci_dev *parent; | |
675 | uint8_t bcomp, dcomp, fcomp; | |
676 | int64_t rc; | |
677 | long rid_end, rid; | |
678 | ||
679 | /* Currently, we just deconfigure VF PE. Bus PE will always there.*/ | |
680 | if (pe->pbus) { | |
681 | int count; | |
682 | ||
683 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
684 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
685 | parent = pe->pbus->self; | |
686 | if (pe->flags & PNV_IODA_PE_BUS_ALL) | |
687 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
688 | else | |
689 | count = 1; | |
690 | ||
691 | switch(count) { | |
692 | case 1: bcomp = OpalPciBusAll; break; | |
693 | case 2: bcomp = OpalPciBus7Bits; break; | |
694 | case 4: bcomp = OpalPciBus6Bits; break; | |
695 | case 8: bcomp = OpalPciBus5Bits; break; | |
696 | case 16: bcomp = OpalPciBus4Bits; break; | |
697 | case 32: bcomp = OpalPciBus3Bits; break; | |
698 | default: | |
699 | dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", | |
700 | count); | |
701 | /* Do an exact match only */ | |
702 | bcomp = OpalPciBusAll; | |
703 | } | |
704 | rid_end = pe->rid + (count << 8); | |
705 | } else { | |
706 | if (pe->flags & PNV_IODA_PE_VF) | |
707 | parent = pe->parent_dev; | |
708 | else | |
709 | parent = pe->pdev->bus->self; | |
710 | bcomp = OpalPciBusAll; | |
711 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
712 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
713 | rid_end = pe->rid + 1; | |
714 | } | |
715 | ||
716 | /* Clear the reverse map */ | |
717 | for (rid = pe->rid; rid < rid_end; rid++) | |
718 | phb->ioda.pe_rmap[rid] = 0; | |
719 | ||
720 | /* Release from all parents PELT-V */ | |
721 | while (parent) { | |
722 | struct pci_dn *pdn = pci_get_pdn(parent); | |
723 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { | |
724 | rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, | |
725 | pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); | |
726 | /* XXX What to do in case of error ? */ | |
727 | } | |
728 | parent = parent->bus->self; | |
729 | } | |
730 | ||
731 | opal_pci_eeh_freeze_set(phb->opal_id, pe->pe_number, | |
732 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
733 | ||
734 | /* Disassociate PE in PELT */ | |
735 | rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number, | |
736 | pe->pe_number, OPAL_REMOVE_PE_FROM_DOMAIN); | |
737 | if (rc) | |
738 | pe_warn(pe, "OPAL error %ld remove self from PELTV\n", rc); | |
739 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, | |
740 | bcomp, dcomp, fcomp, OPAL_UNMAP_PE); | |
741 | if (rc) | |
742 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
743 | ||
744 | pe->pbus = NULL; | |
745 | pe->pdev = NULL; | |
746 | pe->parent_dev = NULL; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | #endif /* CONFIG_PCI_IOV */ | |
751 | ||
cad5cef6 | 752 | static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) |
184cd4a3 BH |
753 | { |
754 | struct pci_dev *parent; | |
755 | uint8_t bcomp, dcomp, fcomp; | |
756 | long rc, rid_end, rid; | |
757 | ||
758 | /* Bus validation ? */ | |
759 | if (pe->pbus) { | |
760 | int count; | |
761 | ||
762 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
763 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
764 | parent = pe->pbus->self; | |
fb446ad0 GS |
765 | if (pe->flags & PNV_IODA_PE_BUS_ALL) |
766 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
767 | else | |
768 | count = 1; | |
769 | ||
184cd4a3 BH |
770 | switch(count) { |
771 | case 1: bcomp = OpalPciBusAll; break; | |
772 | case 2: bcomp = OpalPciBus7Bits; break; | |
773 | case 4: bcomp = OpalPciBus6Bits; break; | |
774 | case 8: bcomp = OpalPciBus5Bits; break; | |
775 | case 16: bcomp = OpalPciBus4Bits; break; | |
776 | case 32: bcomp = OpalPciBus3Bits; break; | |
777 | default: | |
781a868f WY |
778 | dev_err(&pe->pbus->dev, "Number of subordinate buses %d unsupported\n", |
779 | count); | |
184cd4a3 BH |
780 | /* Do an exact match only */ |
781 | bcomp = OpalPciBusAll; | |
782 | } | |
783 | rid_end = pe->rid + (count << 8); | |
784 | } else { | |
781a868f WY |
785 | #ifdef CONFIG_PCI_IOV |
786 | if (pe->flags & PNV_IODA_PE_VF) | |
787 | parent = pe->parent_dev; | |
788 | else | |
789 | #endif /* CONFIG_PCI_IOV */ | |
790 | parent = pe->pdev->bus->self; | |
184cd4a3 BH |
791 | bcomp = OpalPciBusAll; |
792 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
793 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
794 | rid_end = pe->rid + 1; | |
795 | } | |
796 | ||
631ad691 GS |
797 | /* |
798 | * Associate PE in PELT. We need add the PE into the | |
799 | * corresponding PELT-V as well. Otherwise, the error | |
800 | * originated from the PE might contribute to other | |
801 | * PEs. | |
802 | */ | |
184cd4a3 BH |
803 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, |
804 | bcomp, dcomp, fcomp, OPAL_MAP_PE); | |
805 | if (rc) { | |
806 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
807 | return -ENXIO; | |
808 | } | |
631ad691 | 809 | |
b131a842 GS |
810 | /* Configure PELTV */ |
811 | pnv_ioda_set_peltv(phb, pe, true); | |
184cd4a3 | 812 | |
184cd4a3 BH |
813 | /* Setup reverse map */ |
814 | for (rid = pe->rid; rid < rid_end; rid++) | |
815 | phb->ioda.pe_rmap[rid] = pe->pe_number; | |
816 | ||
817 | /* Setup one MVTs on IODA1 */ | |
4773f76b GS |
818 | if (phb->type != PNV_PHB_IODA1) { |
819 | pe->mve_number = 0; | |
820 | goto out; | |
821 | } | |
822 | ||
823 | pe->mve_number = pe->pe_number; | |
824 | rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, pe->pe_number); | |
825 | if (rc != OPAL_SUCCESS) { | |
826 | pe_err(pe, "OPAL error %ld setting up MVE %d\n", | |
827 | rc, pe->mve_number); | |
828 | pe->mve_number = -1; | |
829 | } else { | |
830 | rc = opal_pci_set_mve_enable(phb->opal_id, | |
831 | pe->mve_number, OPAL_ENABLE_MVE); | |
184cd4a3 | 832 | if (rc) { |
4773f76b | 833 | pe_err(pe, "OPAL error %ld enabling MVE %d\n", |
184cd4a3 BH |
834 | rc, pe->mve_number); |
835 | pe->mve_number = -1; | |
184cd4a3 | 836 | } |
4773f76b | 837 | } |
184cd4a3 | 838 | |
4773f76b | 839 | out: |
184cd4a3 BH |
840 | return 0; |
841 | } | |
842 | ||
cad5cef6 GKH |
843 | static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, |
844 | struct pnv_ioda_pe *pe) | |
184cd4a3 BH |
845 | { |
846 | struct pnv_ioda_pe *lpe; | |
847 | ||
7ebdf956 | 848 | list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 | 849 | if (lpe->dma_weight < pe->dma_weight) { |
7ebdf956 | 850 | list_add_tail(&pe->dma_link, &lpe->dma_link); |
184cd4a3 BH |
851 | return; |
852 | } | |
853 | } | |
7ebdf956 | 854 | list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list); |
184cd4a3 BH |
855 | } |
856 | ||
857 | static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) | |
858 | { | |
859 | /* This is quite simplistic. The "base" weight of a device | |
860 | * is 10. 0 means no DMA is to be accounted for it. | |
861 | */ | |
862 | ||
863 | /* If it's a bridge, no DMA */ | |
864 | if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) | |
865 | return 0; | |
866 | ||
867 | /* Reduce the weight of slow USB controllers */ | |
868 | if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || | |
869 | dev->class == PCI_CLASS_SERIAL_USB_OHCI || | |
870 | dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
871 | return 3; | |
872 | ||
873 | /* Increase the weight of RAID (includes Obsidian) */ | |
874 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) | |
875 | return 15; | |
876 | ||
877 | /* Default */ | |
878 | return 10; | |
879 | } | |
880 | ||
781a868f WY |
881 | #ifdef CONFIG_PCI_IOV |
882 | static int pnv_pci_vf_resource_shift(struct pci_dev *dev, int offset) | |
883 | { | |
884 | struct pci_dn *pdn = pci_get_pdn(dev); | |
885 | int i; | |
886 | struct resource *res, res2; | |
887 | resource_size_t size; | |
888 | u16 num_vfs; | |
889 | ||
890 | if (!dev->is_physfn) | |
891 | return -EINVAL; | |
892 | ||
893 | /* | |
894 | * "offset" is in VFs. The M64 windows are sized so that when they | |
895 | * are segmented, each segment is the same size as the IOV BAR. | |
896 | * Each segment is in a separate PE, and the high order bits of the | |
897 | * address are the PE number. Therefore, each VF's BAR is in a | |
898 | * separate PE, and changing the IOV BAR start address changes the | |
899 | * range of PEs the VFs are in. | |
900 | */ | |
901 | num_vfs = pdn->num_vfs; | |
902 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
903 | res = &dev->resource[i + PCI_IOV_RESOURCES]; | |
904 | if (!res->flags || !res->parent) | |
905 | continue; | |
906 | ||
907 | if (!pnv_pci_is_mem_pref_64(res->flags)) | |
908 | continue; | |
909 | ||
910 | /* | |
911 | * The actual IOV BAR range is determined by the start address | |
912 | * and the actual size for num_vfs VFs BAR. This check is to | |
913 | * make sure that after shifting, the range will not overlap | |
914 | * with another device. | |
915 | */ | |
916 | size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); | |
917 | res2.flags = res->flags; | |
918 | res2.start = res->start + (size * offset); | |
919 | res2.end = res2.start + (size * num_vfs) - 1; | |
920 | ||
921 | if (res2.end > res->end) { | |
922 | dev_err(&dev->dev, "VF BAR%d: %pR would extend past %pR (trying to enable %d VFs shifted by %d)\n", | |
923 | i, &res2, res, num_vfs, offset); | |
924 | return -EBUSY; | |
925 | } | |
926 | } | |
927 | ||
928 | /* | |
929 | * After doing so, there would be a "hole" in the /proc/iomem when | |
930 | * offset is a positive value. It looks like the device return some | |
931 | * mmio back to the system, which actually no one could use it. | |
932 | */ | |
933 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
934 | res = &dev->resource[i + PCI_IOV_RESOURCES]; | |
935 | if (!res->flags || !res->parent) | |
936 | continue; | |
937 | ||
938 | if (!pnv_pci_is_mem_pref_64(res->flags)) | |
939 | continue; | |
940 | ||
941 | size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES); | |
942 | res2 = *res; | |
943 | res->start += size * offset; | |
944 | ||
945 | dev_info(&dev->dev, "VF BAR%d: %pR shifted to %pR (enabling %d VFs shifted by %d)\n", | |
946 | i, &res2, res, num_vfs, offset); | |
947 | pci_update_resource(dev, i + PCI_IOV_RESOURCES); | |
948 | } | |
949 | return 0; | |
950 | } | |
951 | #endif /* CONFIG_PCI_IOV */ | |
952 | ||
fb446ad0 | 953 | #if 0 |
cad5cef6 | 954 | static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) |
184cd4a3 BH |
955 | { |
956 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
957 | struct pnv_phb *phb = hose->private_data; | |
b72c1f65 | 958 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
959 | struct pnv_ioda_pe *pe; |
960 | int pe_num; | |
961 | ||
962 | if (!pdn) { | |
963 | pr_err("%s: Device tree node not associated properly\n", | |
964 | pci_name(dev)); | |
965 | return NULL; | |
966 | } | |
967 | if (pdn->pe_number != IODA_INVALID_PE) | |
968 | return NULL; | |
969 | ||
970 | /* PE#0 has been pre-set */ | |
971 | if (dev->bus->number == 0) | |
972 | pe_num = 0; | |
973 | else | |
974 | pe_num = pnv_ioda_alloc_pe(phb); | |
975 | if (pe_num == IODA_INVALID_PE) { | |
976 | pr_warning("%s: Not enough PE# available, disabling device\n", | |
977 | pci_name(dev)); | |
978 | return NULL; | |
979 | } | |
980 | ||
981 | /* NOTE: We get only one ref to the pci_dev for the pdn, not for the | |
982 | * pointer in the PE data structure, both should be destroyed at the | |
983 | * same time. However, this needs to be looked at more closely again | |
984 | * once we actually start removing things (Hotplug, SR-IOV, ...) | |
985 | * | |
986 | * At some point we want to remove the PDN completely anyways | |
987 | */ | |
988 | pe = &phb->ioda.pe_array[pe_num]; | |
989 | pci_dev_get(dev); | |
990 | pdn->pcidev = dev; | |
991 | pdn->pe_number = pe_num; | |
992 | pe->pdev = dev; | |
993 | pe->pbus = NULL; | |
994 | pe->tce32_seg = -1; | |
995 | pe->mve_number = -1; | |
996 | pe->rid = dev->bus->number << 8 | pdn->devfn; | |
997 | ||
998 | pe_info(pe, "Associated device to PE\n"); | |
999 | ||
1000 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1001 | /* XXX What do we do here ? */ | |
1002 | if (pe_num) | |
1003 | pnv_ioda_free_pe(phb, pe_num); | |
1004 | pdn->pe_number = IODA_INVALID_PE; | |
1005 | pe->pdev = NULL; | |
1006 | pci_dev_put(dev); | |
1007 | return NULL; | |
1008 | } | |
1009 | ||
1010 | /* Assign a DMA weight to the device */ | |
1011 | pe->dma_weight = pnv_ioda_dma_weight(dev); | |
1012 | if (pe->dma_weight != 0) { | |
1013 | phb->ioda.dma_weight += pe->dma_weight; | |
1014 | phb->ioda.dma_pe_count++; | |
1015 | } | |
1016 | ||
1017 | /* Link the PE */ | |
1018 | pnv_ioda_link_pe_by_weight(phb, pe); | |
1019 | ||
1020 | return pe; | |
1021 | } | |
fb446ad0 | 1022 | #endif /* Useful for SRIOV case */ |
184cd4a3 BH |
1023 | |
1024 | static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) | |
1025 | { | |
1026 | struct pci_dev *dev; | |
1027 | ||
1028 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
b72c1f65 | 1029 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
1030 | |
1031 | if (pdn == NULL) { | |
1032 | pr_warn("%s: No device node associated with device !\n", | |
1033 | pci_name(dev)); | |
1034 | continue; | |
1035 | } | |
184cd4a3 BH |
1036 | pdn->pe_number = pe->pe_number; |
1037 | pe->dma_weight += pnv_ioda_dma_weight(dev); | |
fb446ad0 | 1038 | if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) |
184cd4a3 BH |
1039 | pnv_ioda_setup_same_PE(dev->subordinate, pe); |
1040 | } | |
1041 | } | |
1042 | ||
fb446ad0 GS |
1043 | /* |
1044 | * There're 2 types of PCI bus sensitive PEs: One that is compromised of | |
1045 | * single PCI bus. Another one that contains the primary PCI bus and its | |
1046 | * subordinate PCI devices and buses. The second type of PE is normally | |
1047 | * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. | |
1048 | */ | |
cad5cef6 | 1049 | static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) |
184cd4a3 | 1050 | { |
fb446ad0 | 1051 | struct pci_controller *hose = pci_bus_to_host(bus); |
184cd4a3 | 1052 | struct pnv_phb *phb = hose->private_data; |
184cd4a3 | 1053 | struct pnv_ioda_pe *pe; |
262af557 GC |
1054 | int pe_num = IODA_INVALID_PE; |
1055 | ||
1056 | /* Check if PE is determined by M64 */ | |
1057 | if (phb->pick_m64_pe) | |
1058 | pe_num = phb->pick_m64_pe(phb, bus, all); | |
1059 | ||
1060 | /* The PE number isn't pinned by M64 */ | |
1061 | if (pe_num == IODA_INVALID_PE) | |
1062 | pe_num = pnv_ioda_alloc_pe(phb); | |
184cd4a3 | 1063 | |
184cd4a3 | 1064 | if (pe_num == IODA_INVALID_PE) { |
fb446ad0 GS |
1065 | pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", |
1066 | __func__, pci_domain_nr(bus), bus->number); | |
184cd4a3 BH |
1067 | return; |
1068 | } | |
1069 | ||
1070 | pe = &phb->ioda.pe_array[pe_num]; | |
262af557 | 1071 | pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); |
184cd4a3 BH |
1072 | pe->pbus = bus; |
1073 | pe->pdev = NULL; | |
1074 | pe->tce32_seg = -1; | |
1075 | pe->mve_number = -1; | |
b918c62e | 1076 | pe->rid = bus->busn_res.start << 8; |
184cd4a3 BH |
1077 | pe->dma_weight = 0; |
1078 | ||
fb446ad0 GS |
1079 | if (all) |
1080 | pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", | |
1081 | bus->busn_res.start, bus->busn_res.end, pe_num); | |
1082 | else | |
1083 | pe_info(pe, "Secondary bus %d associated with PE#%d\n", | |
1084 | bus->busn_res.start, pe_num); | |
184cd4a3 BH |
1085 | |
1086 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1087 | /* XXX What do we do here ? */ | |
1088 | if (pe_num) | |
1089 | pnv_ioda_free_pe(phb, pe_num); | |
1090 | pe->pbus = NULL; | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | /* Associate it with all child devices */ | |
1095 | pnv_ioda_setup_same_PE(bus, pe); | |
1096 | ||
7ebdf956 GS |
1097 | /* Put PE to the list */ |
1098 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
1099 | ||
184cd4a3 BH |
1100 | /* Account for one DMA PE if at least one DMA capable device exist |
1101 | * below the bridge | |
1102 | */ | |
1103 | if (pe->dma_weight != 0) { | |
1104 | phb->ioda.dma_weight += pe->dma_weight; | |
1105 | phb->ioda.dma_pe_count++; | |
1106 | } | |
1107 | ||
1108 | /* Link the PE */ | |
1109 | pnv_ioda_link_pe_by_weight(phb, pe); | |
1110 | } | |
1111 | ||
cad5cef6 | 1112 | static void pnv_ioda_setup_PEs(struct pci_bus *bus) |
184cd4a3 BH |
1113 | { |
1114 | struct pci_dev *dev; | |
fb446ad0 GS |
1115 | |
1116 | pnv_ioda_setup_bus_PE(bus, 0); | |
184cd4a3 BH |
1117 | |
1118 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
fb446ad0 GS |
1119 | if (dev->subordinate) { |
1120 | if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) | |
1121 | pnv_ioda_setup_bus_PE(dev->subordinate, 1); | |
1122 | else | |
1123 | pnv_ioda_setup_PEs(dev->subordinate); | |
1124 | } | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* | |
1129 | * Configure PEs so that the downstream PCI buses and devices | |
1130 | * could have their associated PE#. Unfortunately, we didn't | |
1131 | * figure out the way to identify the PLX bridge yet. So we | |
1132 | * simply put the PCI bus and the subordinate behind the root | |
1133 | * port to PE# here. The game rule here is expected to be changed | |
1134 | * as soon as we can detected PLX bridge correctly. | |
1135 | */ | |
cad5cef6 | 1136 | static void pnv_pci_ioda_setup_PEs(void) |
fb446ad0 GS |
1137 | { |
1138 | struct pci_controller *hose, *tmp; | |
262af557 | 1139 | struct pnv_phb *phb; |
fb446ad0 GS |
1140 | |
1141 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
262af557 GC |
1142 | phb = hose->private_data; |
1143 | ||
1144 | /* M64 layout might affect PE allocation */ | |
5ef73567 GS |
1145 | if (phb->reserve_m64_pe) |
1146 | phb->reserve_m64_pe(phb); | |
262af557 | 1147 | |
fb446ad0 | 1148 | pnv_ioda_setup_PEs(hose->bus); |
184cd4a3 BH |
1149 | } |
1150 | } | |
1151 | ||
a8b2f828 | 1152 | #ifdef CONFIG_PCI_IOV |
781a868f WY |
1153 | static int pnv_pci_vf_release_m64(struct pci_dev *pdev) |
1154 | { | |
1155 | struct pci_bus *bus; | |
1156 | struct pci_controller *hose; | |
1157 | struct pnv_phb *phb; | |
1158 | struct pci_dn *pdn; | |
02639b0e | 1159 | int i, j; |
781a868f WY |
1160 | |
1161 | bus = pdev->bus; | |
1162 | hose = pci_bus_to_host(bus); | |
1163 | phb = hose->private_data; | |
1164 | pdn = pci_get_pdn(pdev); | |
1165 | ||
02639b0e WY |
1166 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) |
1167 | for (j = 0; j < M64_PER_IOV; j++) { | |
1168 | if (pdn->m64_wins[i][j] == IODA_INVALID_M64) | |
1169 | continue; | |
1170 | opal_pci_phb_mmio_enable(phb->opal_id, | |
1171 | OPAL_M64_WINDOW_TYPE, pdn->m64_wins[i][j], 0); | |
1172 | clear_bit(pdn->m64_wins[i][j], &phb->ioda.m64_bar_alloc); | |
1173 | pdn->m64_wins[i][j] = IODA_INVALID_M64; | |
1174 | } | |
781a868f WY |
1175 | |
1176 | return 0; | |
1177 | } | |
1178 | ||
02639b0e | 1179 | static int pnv_pci_vf_assign_m64(struct pci_dev *pdev, u16 num_vfs) |
781a868f WY |
1180 | { |
1181 | struct pci_bus *bus; | |
1182 | struct pci_controller *hose; | |
1183 | struct pnv_phb *phb; | |
1184 | struct pci_dn *pdn; | |
1185 | unsigned int win; | |
1186 | struct resource *res; | |
02639b0e | 1187 | int i, j; |
781a868f | 1188 | int64_t rc; |
02639b0e WY |
1189 | int total_vfs; |
1190 | resource_size_t size, start; | |
1191 | int pe_num; | |
1192 | int vf_groups; | |
1193 | int vf_per_group; | |
781a868f WY |
1194 | |
1195 | bus = pdev->bus; | |
1196 | hose = pci_bus_to_host(bus); | |
1197 | phb = hose->private_data; | |
1198 | pdn = pci_get_pdn(pdev); | |
02639b0e | 1199 | total_vfs = pci_sriov_get_totalvfs(pdev); |
781a868f WY |
1200 | |
1201 | /* Initialize the m64_wins to IODA_INVALID_M64 */ | |
1202 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) | |
02639b0e WY |
1203 | for (j = 0; j < M64_PER_IOV; j++) |
1204 | pdn->m64_wins[i][j] = IODA_INVALID_M64; | |
1205 | ||
1206 | if (pdn->m64_per_iov == M64_PER_IOV) { | |
1207 | vf_groups = (num_vfs <= M64_PER_IOV) ? num_vfs: M64_PER_IOV; | |
1208 | vf_per_group = (num_vfs <= M64_PER_IOV)? 1: | |
1209 | roundup_pow_of_two(num_vfs) / pdn->m64_per_iov; | |
1210 | } else { | |
1211 | vf_groups = 1; | |
1212 | vf_per_group = 1; | |
1213 | } | |
781a868f WY |
1214 | |
1215 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
1216 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
1217 | if (!res->flags || !res->parent) | |
1218 | continue; | |
1219 | ||
1220 | if (!pnv_pci_is_mem_pref_64(res->flags)) | |
1221 | continue; | |
1222 | ||
02639b0e WY |
1223 | for (j = 0; j < vf_groups; j++) { |
1224 | do { | |
1225 | win = find_next_zero_bit(&phb->ioda.m64_bar_alloc, | |
1226 | phb->ioda.m64_bar_idx + 1, 0); | |
1227 | ||
1228 | if (win >= phb->ioda.m64_bar_idx + 1) | |
1229 | goto m64_failed; | |
1230 | } while (test_and_set_bit(win, &phb->ioda.m64_bar_alloc)); | |
1231 | ||
1232 | pdn->m64_wins[i][j] = win; | |
1233 | ||
1234 | if (pdn->m64_per_iov == M64_PER_IOV) { | |
1235 | size = pci_iov_resource_size(pdev, | |
1236 | PCI_IOV_RESOURCES + i); | |
1237 | size = size * vf_per_group; | |
1238 | start = res->start + size * j; | |
1239 | } else { | |
1240 | size = resource_size(res); | |
1241 | start = res->start; | |
1242 | } | |
1243 | ||
1244 | /* Map the M64 here */ | |
1245 | if (pdn->m64_per_iov == M64_PER_IOV) { | |
1246 | pe_num = pdn->offset + j; | |
1247 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
1248 | pe_num, OPAL_M64_WINDOW_TYPE, | |
1249 | pdn->m64_wins[i][j], 0); | |
1250 | } | |
1251 | ||
1252 | rc = opal_pci_set_phb_mem_window(phb->opal_id, | |
1253 | OPAL_M64_WINDOW_TYPE, | |
1254 | pdn->m64_wins[i][j], | |
1255 | start, | |
1256 | 0, /* unused */ | |
1257 | size); | |
781a868f | 1258 | |
781a868f | 1259 | |
02639b0e WY |
1260 | if (rc != OPAL_SUCCESS) { |
1261 | dev_err(&pdev->dev, "Failed to map M64 window #%d: %lld\n", | |
1262 | win, rc); | |
1263 | goto m64_failed; | |
1264 | } | |
781a868f | 1265 | |
02639b0e WY |
1266 | if (pdn->m64_per_iov == M64_PER_IOV) |
1267 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
1268 | OPAL_M64_WINDOW_TYPE, pdn->m64_wins[i][j], 2); | |
1269 | else | |
1270 | rc = opal_pci_phb_mmio_enable(phb->opal_id, | |
1271 | OPAL_M64_WINDOW_TYPE, pdn->m64_wins[i][j], 1); | |
781a868f | 1272 | |
02639b0e WY |
1273 | if (rc != OPAL_SUCCESS) { |
1274 | dev_err(&pdev->dev, "Failed to enable M64 window #%d: %llx\n", | |
1275 | win, rc); | |
1276 | goto m64_failed; | |
1277 | } | |
781a868f WY |
1278 | } |
1279 | } | |
1280 | return 0; | |
1281 | ||
1282 | m64_failed: | |
1283 | pnv_pci_vf_release_m64(pdev); | |
1284 | return -EBUSY; | |
1285 | } | |
1286 | ||
1287 | static void pnv_pci_ioda2_release_dma_pe(struct pci_dev *dev, struct pnv_ioda_pe *pe) | |
1288 | { | |
1289 | struct pci_bus *bus; | |
1290 | struct pci_controller *hose; | |
1291 | struct pnv_phb *phb; | |
1292 | struct iommu_table *tbl; | |
1293 | unsigned long addr; | |
1294 | int64_t rc; | |
1295 | ||
1296 | bus = dev->bus; | |
1297 | hose = pci_bus_to_host(bus); | |
1298 | phb = hose->private_data; | |
b348aa65 | 1299 | tbl = pe->table_group.tables[0]; |
781a868f WY |
1300 | addr = tbl->it_base; |
1301 | ||
1302 | opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, | |
1303 | pe->pe_number << 1, 1, __pa(addr), | |
1304 | 0, 0x1000); | |
1305 | ||
1306 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
1307 | pe->pe_number, | |
1308 | (pe->pe_number << 1) + 1, | |
1309 | pe->tce_bypass_base, | |
1310 | 0); | |
1311 | if (rc) | |
1312 | pe_warn(pe, "OPAL error %ld release DMA window\n", rc); | |
1313 | ||
0eaf4def AK |
1314 | pnv_pci_unlink_table_and_group(tbl, &pe->table_group); |
1315 | if (pe->table_group.group) { | |
1316 | iommu_group_put(pe->table_group.group); | |
1317 | BUG_ON(pe->table_group.group); | |
ac9a5889 | 1318 | } |
aca6913f | 1319 | pnv_pci_ioda2_table_free_pages(tbl); |
781a868f | 1320 | iommu_free_table(tbl, of_node_full_name(dev->dev.of_node)); |
781a868f WY |
1321 | } |
1322 | ||
02639b0e | 1323 | static void pnv_ioda_release_vf_PE(struct pci_dev *pdev, u16 num_vfs) |
781a868f WY |
1324 | { |
1325 | struct pci_bus *bus; | |
1326 | struct pci_controller *hose; | |
1327 | struct pnv_phb *phb; | |
1328 | struct pnv_ioda_pe *pe, *pe_n; | |
1329 | struct pci_dn *pdn; | |
02639b0e WY |
1330 | u16 vf_index; |
1331 | int64_t rc; | |
781a868f WY |
1332 | |
1333 | bus = pdev->bus; | |
1334 | hose = pci_bus_to_host(bus); | |
1335 | phb = hose->private_data; | |
02639b0e | 1336 | pdn = pci_get_pdn(pdev); |
781a868f WY |
1337 | |
1338 | if (!pdev->is_physfn) | |
1339 | return; | |
1340 | ||
02639b0e WY |
1341 | if (pdn->m64_per_iov == M64_PER_IOV && num_vfs > M64_PER_IOV) { |
1342 | int vf_group; | |
1343 | int vf_per_group; | |
1344 | int vf_index1; | |
1345 | ||
1346 | vf_per_group = roundup_pow_of_two(num_vfs) / pdn->m64_per_iov; | |
1347 | ||
1348 | for (vf_group = 0; vf_group < M64_PER_IOV; vf_group++) | |
1349 | for (vf_index = vf_group * vf_per_group; | |
1350 | vf_index < (vf_group + 1) * vf_per_group && | |
1351 | vf_index < num_vfs; | |
1352 | vf_index++) | |
1353 | for (vf_index1 = vf_group * vf_per_group; | |
1354 | vf_index1 < (vf_group + 1) * vf_per_group && | |
1355 | vf_index1 < num_vfs; | |
1356 | vf_index1++){ | |
1357 | ||
1358 | rc = opal_pci_set_peltv(phb->opal_id, | |
1359 | pdn->offset + vf_index, | |
1360 | pdn->offset + vf_index1, | |
1361 | OPAL_REMOVE_PE_FROM_DOMAIN); | |
1362 | ||
1363 | if (rc) | |
1364 | dev_warn(&pdev->dev, "%s: Failed to unlink same group PE#%d(%lld)\n", | |
1365 | __func__, | |
1366 | pdn->offset + vf_index1, rc); | |
1367 | } | |
1368 | } | |
1369 | ||
781a868f WY |
1370 | list_for_each_entry_safe(pe, pe_n, &phb->ioda.pe_list, list) { |
1371 | if (pe->parent_dev != pdev) | |
1372 | continue; | |
1373 | ||
1374 | pnv_pci_ioda2_release_dma_pe(pdev, pe); | |
1375 | ||
1376 | /* Remove from list */ | |
1377 | mutex_lock(&phb->ioda.pe_list_mutex); | |
1378 | list_del(&pe->list); | |
1379 | mutex_unlock(&phb->ioda.pe_list_mutex); | |
1380 | ||
1381 | pnv_ioda_deconfigure_pe(phb, pe); | |
1382 | ||
1383 | pnv_ioda_free_pe(phb, pe->pe_number); | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | void pnv_pci_sriov_disable(struct pci_dev *pdev) | |
1388 | { | |
1389 | struct pci_bus *bus; | |
1390 | struct pci_controller *hose; | |
1391 | struct pnv_phb *phb; | |
1392 | struct pci_dn *pdn; | |
1393 | struct pci_sriov *iov; | |
1394 | u16 num_vfs; | |
1395 | ||
1396 | bus = pdev->bus; | |
1397 | hose = pci_bus_to_host(bus); | |
1398 | phb = hose->private_data; | |
1399 | pdn = pci_get_pdn(pdev); | |
1400 | iov = pdev->sriov; | |
1401 | num_vfs = pdn->num_vfs; | |
1402 | ||
1403 | /* Release VF PEs */ | |
02639b0e | 1404 | pnv_ioda_release_vf_PE(pdev, num_vfs); |
781a868f WY |
1405 | |
1406 | if (phb->type == PNV_PHB_IODA2) { | |
02639b0e WY |
1407 | if (pdn->m64_per_iov == 1) |
1408 | pnv_pci_vf_resource_shift(pdev, -pdn->offset); | |
781a868f WY |
1409 | |
1410 | /* Release M64 windows */ | |
1411 | pnv_pci_vf_release_m64(pdev); | |
1412 | ||
1413 | /* Release PE numbers */ | |
1414 | bitmap_clear(phb->ioda.pe_alloc, pdn->offset, num_vfs); | |
1415 | pdn->offset = 0; | |
1416 | } | |
1417 | } | |
1418 | ||
1419 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, | |
1420 | struct pnv_ioda_pe *pe); | |
1421 | static void pnv_ioda_setup_vf_PE(struct pci_dev *pdev, u16 num_vfs) | |
1422 | { | |
1423 | struct pci_bus *bus; | |
1424 | struct pci_controller *hose; | |
1425 | struct pnv_phb *phb; | |
1426 | struct pnv_ioda_pe *pe; | |
1427 | int pe_num; | |
1428 | u16 vf_index; | |
1429 | struct pci_dn *pdn; | |
02639b0e | 1430 | int64_t rc; |
781a868f WY |
1431 | |
1432 | bus = pdev->bus; | |
1433 | hose = pci_bus_to_host(bus); | |
1434 | phb = hose->private_data; | |
1435 | pdn = pci_get_pdn(pdev); | |
1436 | ||
1437 | if (!pdev->is_physfn) | |
1438 | return; | |
1439 | ||
1440 | /* Reserve PE for each VF */ | |
1441 | for (vf_index = 0; vf_index < num_vfs; vf_index++) { | |
1442 | pe_num = pdn->offset + vf_index; | |
1443 | ||
1444 | pe = &phb->ioda.pe_array[pe_num]; | |
1445 | pe->pe_number = pe_num; | |
1446 | pe->phb = phb; | |
1447 | pe->flags = PNV_IODA_PE_VF; | |
1448 | pe->pbus = NULL; | |
1449 | pe->parent_dev = pdev; | |
1450 | pe->tce32_seg = -1; | |
1451 | pe->mve_number = -1; | |
1452 | pe->rid = (pci_iov_virtfn_bus(pdev, vf_index) << 8) | | |
1453 | pci_iov_virtfn_devfn(pdev, vf_index); | |
1454 | ||
1455 | pe_info(pe, "VF %04d:%02d:%02d.%d associated with PE#%d\n", | |
1456 | hose->global_number, pdev->bus->number, | |
1457 | PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)), | |
1458 | PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pe_num); | |
1459 | ||
1460 | if (pnv_ioda_configure_pe(phb, pe)) { | |
1461 | /* XXX What do we do here ? */ | |
1462 | if (pe_num) | |
1463 | pnv_ioda_free_pe(phb, pe_num); | |
1464 | pe->pdev = NULL; | |
1465 | continue; | |
1466 | } | |
1467 | ||
781a868f WY |
1468 | /* Put PE to the list */ |
1469 | mutex_lock(&phb->ioda.pe_list_mutex); | |
1470 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
1471 | mutex_unlock(&phb->ioda.pe_list_mutex); | |
1472 | ||
1473 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
1474 | } | |
02639b0e WY |
1475 | |
1476 | if (pdn->m64_per_iov == M64_PER_IOV && num_vfs > M64_PER_IOV) { | |
1477 | int vf_group; | |
1478 | int vf_per_group; | |
1479 | int vf_index1; | |
1480 | ||
1481 | vf_per_group = roundup_pow_of_two(num_vfs) / pdn->m64_per_iov; | |
1482 | ||
1483 | for (vf_group = 0; vf_group < M64_PER_IOV; vf_group++) { | |
1484 | for (vf_index = vf_group * vf_per_group; | |
1485 | vf_index < (vf_group + 1) * vf_per_group && | |
1486 | vf_index < num_vfs; | |
1487 | vf_index++) { | |
1488 | for (vf_index1 = vf_group * vf_per_group; | |
1489 | vf_index1 < (vf_group + 1) * vf_per_group && | |
1490 | vf_index1 < num_vfs; | |
1491 | vf_index1++) { | |
1492 | ||
1493 | rc = opal_pci_set_peltv(phb->opal_id, | |
1494 | pdn->offset + vf_index, | |
1495 | pdn->offset + vf_index1, | |
1496 | OPAL_ADD_PE_TO_DOMAIN); | |
1497 | ||
1498 | if (rc) | |
1499 | dev_warn(&pdev->dev, "%s: Failed to link same group PE#%d(%lld)\n", | |
1500 | __func__, | |
1501 | pdn->offset + vf_index1, rc); | |
1502 | } | |
1503 | } | |
1504 | } | |
1505 | } | |
781a868f WY |
1506 | } |
1507 | ||
1508 | int pnv_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | |
1509 | { | |
1510 | struct pci_bus *bus; | |
1511 | struct pci_controller *hose; | |
1512 | struct pnv_phb *phb; | |
1513 | struct pci_dn *pdn; | |
1514 | int ret; | |
1515 | ||
1516 | bus = pdev->bus; | |
1517 | hose = pci_bus_to_host(bus); | |
1518 | phb = hose->private_data; | |
1519 | pdn = pci_get_pdn(pdev); | |
1520 | ||
1521 | if (phb->type == PNV_PHB_IODA2) { | |
1522 | /* Calculate available PE for required VFs */ | |
1523 | mutex_lock(&phb->ioda.pe_alloc_mutex); | |
1524 | pdn->offset = bitmap_find_next_zero_area( | |
1525 | phb->ioda.pe_alloc, phb->ioda.total_pe, | |
1526 | 0, num_vfs, 0); | |
1527 | if (pdn->offset >= phb->ioda.total_pe) { | |
1528 | mutex_unlock(&phb->ioda.pe_alloc_mutex); | |
1529 | dev_info(&pdev->dev, "Failed to enable VF%d\n", num_vfs); | |
1530 | pdn->offset = 0; | |
1531 | return -EBUSY; | |
1532 | } | |
1533 | bitmap_set(phb->ioda.pe_alloc, pdn->offset, num_vfs); | |
1534 | pdn->num_vfs = num_vfs; | |
1535 | mutex_unlock(&phb->ioda.pe_alloc_mutex); | |
1536 | ||
1537 | /* Assign M64 window accordingly */ | |
02639b0e | 1538 | ret = pnv_pci_vf_assign_m64(pdev, num_vfs); |
781a868f WY |
1539 | if (ret) { |
1540 | dev_info(&pdev->dev, "Not enough M64 window resources\n"); | |
1541 | goto m64_failed; | |
1542 | } | |
1543 | ||
1544 | /* | |
1545 | * When using one M64 BAR to map one IOV BAR, we need to shift | |
1546 | * the IOV BAR according to the PE# allocated to the VFs. | |
1547 | * Otherwise, the PE# for the VF will conflict with others. | |
1548 | */ | |
02639b0e WY |
1549 | if (pdn->m64_per_iov == 1) { |
1550 | ret = pnv_pci_vf_resource_shift(pdev, pdn->offset); | |
1551 | if (ret) | |
1552 | goto m64_failed; | |
1553 | } | |
781a868f WY |
1554 | } |
1555 | ||
1556 | /* Setup VF PEs */ | |
1557 | pnv_ioda_setup_vf_PE(pdev, num_vfs); | |
1558 | ||
1559 | return 0; | |
1560 | ||
1561 | m64_failed: | |
1562 | bitmap_clear(phb->ioda.pe_alloc, pdn->offset, num_vfs); | |
1563 | pdn->offset = 0; | |
1564 | ||
1565 | return ret; | |
1566 | } | |
1567 | ||
a8b2f828 GS |
1568 | int pcibios_sriov_disable(struct pci_dev *pdev) |
1569 | { | |
781a868f WY |
1570 | pnv_pci_sriov_disable(pdev); |
1571 | ||
a8b2f828 GS |
1572 | /* Release PCI data */ |
1573 | remove_dev_pci_data(pdev); | |
1574 | return 0; | |
1575 | } | |
1576 | ||
1577 | int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) | |
1578 | { | |
1579 | /* Allocate PCI data */ | |
1580 | add_dev_pci_data(pdev); | |
781a868f WY |
1581 | |
1582 | pnv_pci_sriov_enable(pdev, num_vfs); | |
a8b2f828 GS |
1583 | return 0; |
1584 | } | |
1585 | #endif /* CONFIG_PCI_IOV */ | |
1586 | ||
959c9bdd | 1587 | static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) |
184cd4a3 | 1588 | { |
b72c1f65 | 1589 | struct pci_dn *pdn = pci_get_pdn(pdev); |
959c9bdd | 1590 | struct pnv_ioda_pe *pe; |
184cd4a3 | 1591 | |
959c9bdd GS |
1592 | /* |
1593 | * The function can be called while the PE# | |
1594 | * hasn't been assigned. Do nothing for the | |
1595 | * case. | |
1596 | */ | |
1597 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
1598 | return; | |
184cd4a3 | 1599 | |
959c9bdd | 1600 | pe = &phb->ioda.pe_array[pdn->pe_number]; |
cd15b048 | 1601 | WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); |
b348aa65 | 1602 | set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); |
4617082e AK |
1603 | /* |
1604 | * Note: iommu_add_device() will fail here as | |
1605 | * for physical PE: the device is already added by now; | |
1606 | * for virtual PE: sysfs entries are not ready yet and | |
1607 | * tce_iommu_bus_notifier will add the device to a group later. | |
1608 | */ | |
184cd4a3 BH |
1609 | } |
1610 | ||
763d2d8d | 1611 | static int pnv_pci_ioda_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) |
cd15b048 | 1612 | { |
763d2d8d DA |
1613 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); |
1614 | struct pnv_phb *phb = hose->private_data; | |
cd15b048 BH |
1615 | struct pci_dn *pdn = pci_get_pdn(pdev); |
1616 | struct pnv_ioda_pe *pe; | |
1617 | uint64_t top; | |
1618 | bool bypass = false; | |
1619 | ||
1620 | if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) | |
1621 | return -ENODEV;; | |
1622 | ||
1623 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
1624 | if (pe->tce_bypass_enabled) { | |
1625 | top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; | |
1626 | bypass = (dma_mask >= top); | |
1627 | } | |
1628 | ||
1629 | if (bypass) { | |
1630 | dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); | |
1631 | set_dma_ops(&pdev->dev, &dma_direct_ops); | |
1632 | set_dma_offset(&pdev->dev, pe->tce_bypass_base); | |
1633 | } else { | |
1634 | dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); | |
1635 | set_dma_ops(&pdev->dev, &dma_iommu_ops); | |
b348aa65 | 1636 | set_iommu_table_base(&pdev->dev, pe->table_group.tables[0]); |
cd15b048 | 1637 | } |
a32305bf | 1638 | *pdev->dev.dma_mask = dma_mask; |
cd15b048 BH |
1639 | return 0; |
1640 | } | |
1641 | ||
fe7e85c6 GS |
1642 | static u64 pnv_pci_ioda_dma_get_required_mask(struct pnv_phb *phb, |
1643 | struct pci_dev *pdev) | |
1644 | { | |
1645 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
1646 | struct pnv_ioda_pe *pe; | |
1647 | u64 end, mask; | |
1648 | ||
1649 | if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) | |
1650 | return 0; | |
1651 | ||
1652 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
1653 | if (!pe->tce_bypass_enabled) | |
1654 | return __dma_get_required_mask(&pdev->dev); | |
1655 | ||
1656 | ||
1657 | end = pe->tce_bypass_base + memblock_end_of_DRAM(); | |
1658 | mask = 1ULL << (fls64(end) - 1); | |
1659 | mask += mask - 1; | |
1660 | ||
1661 | return mask; | |
1662 | } | |
1663 | ||
dff4a39e | 1664 | static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, |
ea30e99e | 1665 | struct pci_bus *bus) |
74251fe2 BH |
1666 | { |
1667 | struct pci_dev *dev; | |
1668 | ||
1669 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
b348aa65 | 1670 | set_iommu_table_base(&dev->dev, pe->table_group.tables[0]); |
4617082e | 1671 | iommu_add_device(&dev->dev); |
dff4a39e | 1672 | |
74251fe2 | 1673 | if (dev->subordinate) |
ea30e99e | 1674 | pnv_ioda_setup_bus_dma(pe, dev->subordinate); |
74251fe2 BH |
1675 | } |
1676 | } | |
1677 | ||
decbda25 AK |
1678 | static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl, |
1679 | unsigned long index, unsigned long npages, bool rm) | |
4cce9550 | 1680 | { |
0eaf4def AK |
1681 | struct iommu_table_group_link *tgl = list_first_entry_or_null( |
1682 | &tbl->it_group_list, struct iommu_table_group_link, | |
1683 | next); | |
1684 | struct pnv_ioda_pe *pe = container_of(tgl->table_group, | |
b348aa65 | 1685 | struct pnv_ioda_pe, table_group); |
3ad26e5c | 1686 | __be64 __iomem *invalidate = rm ? |
5780fb04 AK |
1687 | (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys : |
1688 | pe->phb->ioda.tce_inval_reg; | |
4cce9550 | 1689 | unsigned long start, end, inc; |
b0376c9b | 1690 | const unsigned shift = tbl->it_page_shift; |
4cce9550 | 1691 | |
decbda25 AK |
1692 | start = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset); |
1693 | end = __pa(((__be64 *)tbl->it_base) + index - tbl->it_offset + | |
1694 | npages - 1); | |
4cce9550 GS |
1695 | |
1696 | /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ | |
1697 | if (tbl->it_busno) { | |
b0376c9b AK |
1698 | start <<= shift; |
1699 | end <<= shift; | |
1700 | inc = 128ull << shift; | |
4cce9550 GS |
1701 | start |= tbl->it_busno; |
1702 | end |= tbl->it_busno; | |
1703 | } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { | |
1704 | /* p7ioc-style invalidation, 2 TCEs per write */ | |
1705 | start |= (1ull << 63); | |
1706 | end |= (1ull << 63); | |
1707 | inc = 16; | |
1708 | } else { | |
1709 | /* Default (older HW) */ | |
1710 | inc = 128; | |
1711 | } | |
1712 | ||
1713 | end |= inc - 1; /* round up end to be different than start */ | |
1714 | ||
1715 | mb(); /* Ensure above stores are visible */ | |
1716 | while (start <= end) { | |
8e0a1611 | 1717 | if (rm) |
3ad26e5c | 1718 | __raw_rm_writeq(cpu_to_be64(start), invalidate); |
8e0a1611 | 1719 | else |
3ad26e5c | 1720 | __raw_writeq(cpu_to_be64(start), invalidate); |
4cce9550 GS |
1721 | start += inc; |
1722 | } | |
1723 | ||
1724 | /* | |
1725 | * The iommu layer will do another mb() for us on build() | |
1726 | * and we don't care on free() | |
1727 | */ | |
1728 | } | |
1729 | ||
decbda25 AK |
1730 | static int pnv_ioda1_tce_build(struct iommu_table *tbl, long index, |
1731 | long npages, unsigned long uaddr, | |
1732 | enum dma_data_direction direction, | |
1733 | struct dma_attrs *attrs) | |
1734 | { | |
1735 | int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, | |
1736 | attrs); | |
1737 | ||
1738 | if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE)) | |
1739 | pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false); | |
1740 | ||
1741 | return ret; | |
1742 | } | |
1743 | ||
05c6cfb9 AK |
1744 | #ifdef CONFIG_IOMMU_API |
1745 | static int pnv_ioda1_tce_xchg(struct iommu_table *tbl, long index, | |
1746 | unsigned long *hpa, enum dma_data_direction *direction) | |
1747 | { | |
1748 | long ret = pnv_tce_xchg(tbl, index, hpa, direction); | |
1749 | ||
1750 | if (!ret && (tbl->it_type & | |
1751 | (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE))) | |
1752 | pnv_pci_ioda1_tce_invalidate(tbl, index, 1, false); | |
1753 | ||
1754 | return ret; | |
1755 | } | |
1756 | #endif | |
1757 | ||
decbda25 AK |
1758 | static void pnv_ioda1_tce_free(struct iommu_table *tbl, long index, |
1759 | long npages) | |
1760 | { | |
1761 | pnv_tce_free(tbl, index, npages); | |
1762 | ||
1763 | if (tbl->it_type & TCE_PCI_SWINV_FREE) | |
1764 | pnv_pci_ioda1_tce_invalidate(tbl, index, npages, false); | |
1765 | } | |
1766 | ||
da004c36 | 1767 | static struct iommu_table_ops pnv_ioda1_iommu_ops = { |
decbda25 | 1768 | .set = pnv_ioda1_tce_build, |
05c6cfb9 AK |
1769 | #ifdef CONFIG_IOMMU_API |
1770 | .exchange = pnv_ioda1_tce_xchg, | |
1771 | #endif | |
decbda25 | 1772 | .clear = pnv_ioda1_tce_free, |
da004c36 AK |
1773 | .get = pnv_tce_get, |
1774 | }; | |
1775 | ||
5780fb04 AK |
1776 | static inline void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_ioda_pe *pe) |
1777 | { | |
1778 | /* 01xb - invalidate TCEs that match the specified PE# */ | |
1779 | unsigned long val = (0x4ull << 60) | (pe->pe_number & 0xFF); | |
1780 | struct pnv_phb *phb = pe->phb; | |
1781 | ||
1782 | if (!phb->ioda.tce_inval_reg) | |
1783 | return; | |
1784 | ||
1785 | mb(); /* Ensure above stores are visible */ | |
1786 | __raw_writeq(cpu_to_be64(val), phb->ioda.tce_inval_reg); | |
1787 | } | |
1788 | ||
e57080f1 AK |
1789 | static void pnv_pci_ioda2_do_tce_invalidate(unsigned pe_number, bool rm, |
1790 | __be64 __iomem *invalidate, unsigned shift, | |
1791 | unsigned long index, unsigned long npages) | |
4cce9550 GS |
1792 | { |
1793 | unsigned long start, end, inc; | |
4cce9550 GS |
1794 | |
1795 | /* We'll invalidate DMA address in PE scope */ | |
b0376c9b | 1796 | start = 0x2ull << 60; |
e57080f1 | 1797 | start |= (pe_number & 0xFF); |
4cce9550 GS |
1798 | end = start; |
1799 | ||
1800 | /* Figure out the start, end and step */ | |
decbda25 AK |
1801 | start |= (index << shift); |
1802 | end |= ((index + npages - 1) << shift); | |
b0376c9b | 1803 | inc = (0x1ull << shift); |
4cce9550 GS |
1804 | mb(); |
1805 | ||
1806 | while (start <= end) { | |
8e0a1611 | 1807 | if (rm) |
3ad26e5c | 1808 | __raw_rm_writeq(cpu_to_be64(start), invalidate); |
8e0a1611 | 1809 | else |
3ad26e5c | 1810 | __raw_writeq(cpu_to_be64(start), invalidate); |
4cce9550 GS |
1811 | start += inc; |
1812 | } | |
1813 | } | |
1814 | ||
e57080f1 AK |
1815 | static void pnv_pci_ioda2_tce_invalidate(struct iommu_table *tbl, |
1816 | unsigned long index, unsigned long npages, bool rm) | |
1817 | { | |
1818 | struct iommu_table_group_link *tgl; | |
1819 | ||
1820 | list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) { | |
1821 | struct pnv_ioda_pe *pe = container_of(tgl->table_group, | |
1822 | struct pnv_ioda_pe, table_group); | |
1823 | __be64 __iomem *invalidate = rm ? | |
1824 | (__be64 __iomem *)pe->phb->ioda.tce_inval_reg_phys : | |
1825 | pe->phb->ioda.tce_inval_reg; | |
1826 | ||
1827 | pnv_pci_ioda2_do_tce_invalidate(pe->pe_number, rm, | |
1828 | invalidate, tbl->it_page_shift, | |
1829 | index, npages); | |
1830 | } | |
1831 | } | |
1832 | ||
decbda25 AK |
1833 | static int pnv_ioda2_tce_build(struct iommu_table *tbl, long index, |
1834 | long npages, unsigned long uaddr, | |
1835 | enum dma_data_direction direction, | |
1836 | struct dma_attrs *attrs) | |
4cce9550 | 1837 | { |
decbda25 AK |
1838 | int ret = pnv_tce_build(tbl, index, npages, uaddr, direction, |
1839 | attrs); | |
4cce9550 | 1840 | |
decbda25 AK |
1841 | if (!ret && (tbl->it_type & TCE_PCI_SWINV_CREATE)) |
1842 | pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); | |
1843 | ||
1844 | return ret; | |
1845 | } | |
1846 | ||
05c6cfb9 AK |
1847 | #ifdef CONFIG_IOMMU_API |
1848 | static int pnv_ioda2_tce_xchg(struct iommu_table *tbl, long index, | |
1849 | unsigned long *hpa, enum dma_data_direction *direction) | |
1850 | { | |
1851 | long ret = pnv_tce_xchg(tbl, index, hpa, direction); | |
1852 | ||
1853 | if (!ret && (tbl->it_type & | |
1854 | (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE))) | |
1855 | pnv_pci_ioda2_tce_invalidate(tbl, index, 1, false); | |
1856 | ||
1857 | return ret; | |
1858 | } | |
1859 | #endif | |
1860 | ||
decbda25 AK |
1861 | static void pnv_ioda2_tce_free(struct iommu_table *tbl, long index, |
1862 | long npages) | |
1863 | { | |
1864 | pnv_tce_free(tbl, index, npages); | |
1865 | ||
1866 | if (tbl->it_type & TCE_PCI_SWINV_FREE) | |
1867 | pnv_pci_ioda2_tce_invalidate(tbl, index, npages, false); | |
4cce9550 GS |
1868 | } |
1869 | ||
da004c36 | 1870 | static struct iommu_table_ops pnv_ioda2_iommu_ops = { |
decbda25 | 1871 | .set = pnv_ioda2_tce_build, |
05c6cfb9 AK |
1872 | #ifdef CONFIG_IOMMU_API |
1873 | .exchange = pnv_ioda2_tce_xchg, | |
1874 | #endif | |
decbda25 | 1875 | .clear = pnv_ioda2_tce_free, |
da004c36 AK |
1876 | .get = pnv_tce_get, |
1877 | }; | |
1878 | ||
cad5cef6 GKH |
1879 | static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, |
1880 | struct pnv_ioda_pe *pe, unsigned int base, | |
1881 | unsigned int segs) | |
184cd4a3 BH |
1882 | { |
1883 | ||
1884 | struct page *tce_mem = NULL; | |
184cd4a3 BH |
1885 | struct iommu_table *tbl; |
1886 | unsigned int i; | |
1887 | int64_t rc; | |
1888 | void *addr; | |
1889 | ||
184cd4a3 BH |
1890 | /* XXX FIXME: Handle 64-bit only DMA devices */ |
1891 | /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ | |
1892 | /* XXX FIXME: Allocate multi-level tables on PHB3 */ | |
1893 | ||
1894 | /* We shouldn't already have a 32-bit DMA associated */ | |
1895 | if (WARN_ON(pe->tce32_seg >= 0)) | |
1896 | return; | |
1897 | ||
0eaf4def | 1898 | tbl = pnv_pci_table_alloc(phb->hose->node); |
b348aa65 AK |
1899 | iommu_register_group(&pe->table_group, phb->hose->global_number, |
1900 | pe->pe_number); | |
0eaf4def | 1901 | pnv_pci_link_table_and_group(phb->hose->node, 0, tbl, &pe->table_group); |
c5773822 | 1902 | |
184cd4a3 BH |
1903 | /* Grab a 32-bit TCE table */ |
1904 | pe->tce32_seg = base; | |
1905 | pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", | |
1906 | (base << 28), ((base + segs) << 28) - 1); | |
1907 | ||
1908 | /* XXX Currently, we allocate one big contiguous table for the | |
1909 | * TCEs. We only really need one chunk per 256M of TCE space | |
1910 | * (ie per segment) but that's an optimization for later, it | |
1911 | * requires some added smarts with our get/put_tce implementation | |
1912 | */ | |
1913 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
1914 | get_order(TCE32_TABLE_SIZE * segs)); | |
1915 | if (!tce_mem) { | |
1916 | pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); | |
1917 | goto fail; | |
1918 | } | |
1919 | addr = page_address(tce_mem); | |
1920 | memset(addr, 0, TCE32_TABLE_SIZE * segs); | |
1921 | ||
1922 | /* Configure HW */ | |
1923 | for (i = 0; i < segs; i++) { | |
1924 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
1925 | pe->pe_number, | |
1926 | base + i, 1, | |
1927 | __pa(addr) + TCE32_TABLE_SIZE * i, | |
1928 | TCE32_TABLE_SIZE, 0x1000); | |
1929 | if (rc) { | |
1930 | pe_err(pe, " Failed to configure 32-bit TCE table," | |
1931 | " err %ld\n", rc); | |
1932 | goto fail; | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | /* Setup linux iommu table */ | |
184cd4a3 | 1937 | pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, |
8fa5d454 | 1938 | base << 28, IOMMU_PAGE_SHIFT_4K); |
184cd4a3 BH |
1939 | |
1940 | /* OPAL variant of P7IOC SW invalidated TCEs */ | |
5780fb04 | 1941 | if (phb->ioda.tce_inval_reg) |
65fd766b GS |
1942 | tbl->it_type |= (TCE_PCI_SWINV_CREATE | |
1943 | TCE_PCI_SWINV_FREE | | |
1944 | TCE_PCI_SWINV_PAIR); | |
5780fb04 | 1945 | |
da004c36 | 1946 | tbl->it_ops = &pnv_ioda1_iommu_ops; |
184cd4a3 BH |
1947 | iommu_init_table(tbl, phb->hose->node); |
1948 | ||
781a868f | 1949 | if (pe->flags & PNV_IODA_PE_DEV) { |
4617082e AK |
1950 | /* |
1951 | * Setting table base here only for carrying iommu_group | |
1952 | * further down to let iommu_add_device() do the job. | |
1953 | * pnv_pci_ioda_dma_dev_setup will override it later anyway. | |
1954 | */ | |
1955 | set_iommu_table_base(&pe->pdev->dev, tbl); | |
1956 | iommu_add_device(&pe->pdev->dev); | |
c5773822 | 1957 | } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) |
ea30e99e | 1958 | pnv_ioda_setup_bus_dma(pe, pe->pbus); |
74251fe2 | 1959 | |
184cd4a3 BH |
1960 | return; |
1961 | fail: | |
1962 | /* XXX Failure: Try to fallback to 64-bit only ? */ | |
1963 | if (pe->tce32_seg >= 0) | |
1964 | pe->tce32_seg = -1; | |
1965 | if (tce_mem) | |
1966 | __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); | |
0eaf4def AK |
1967 | if (tbl) { |
1968 | pnv_pci_unlink_table_and_group(tbl, &pe->table_group); | |
1969 | iommu_free_table(tbl, "pnv"); | |
1970 | } | |
184cd4a3 BH |
1971 | } |
1972 | ||
43cb60ab AK |
1973 | static long pnv_pci_ioda2_set_window(struct iommu_table_group *table_group, |
1974 | int num, struct iommu_table *tbl) | |
1975 | { | |
1976 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
1977 | table_group); | |
1978 | struct pnv_phb *phb = pe->phb; | |
1979 | int64_t rc; | |
1980 | const __u64 start_addr = tbl->it_offset << tbl->it_page_shift; | |
1981 | const __u64 win_size = tbl->it_size << tbl->it_page_shift; | |
1982 | ||
1983 | pe_info(pe, "Setting up window %llx..%llx pg=%x\n", | |
1984 | start_addr, start_addr + win_size - 1, | |
1985 | IOMMU_PAGE_SIZE(tbl)); | |
1986 | ||
1987 | /* | |
1988 | * Map TCE table through TVT. The TVE index is the PE number | |
1989 | * shifted by 1 bit for 32-bits DMA space. | |
1990 | */ | |
1991 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
1992 | pe->pe_number, | |
1993 | pe->pe_number << 1, | |
1994 | 1, | |
1995 | __pa(tbl->it_base), | |
1996 | tbl->it_size << 3, | |
1997 | IOMMU_PAGE_SIZE(tbl)); | |
1998 | if (rc) { | |
1999 | pe_err(pe, "Failed to configure TCE table, err %ld\n", rc); | |
2000 | return rc; | |
2001 | } | |
2002 | ||
2003 | pnv_pci_link_table_and_group(phb->hose->node, num, | |
2004 | tbl, &pe->table_group); | |
2005 | pnv_pci_ioda2_tce_invalidate_entire(pe); | |
2006 | ||
2007 | return 0; | |
2008 | } | |
2009 | ||
f87a8864 | 2010 | static void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable) |
cd15b048 | 2011 | { |
cd15b048 BH |
2012 | uint16_t window_id = (pe->pe_number << 1 ) + 1; |
2013 | int64_t rc; | |
2014 | ||
2015 | pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); | |
2016 | if (enable) { | |
2017 | phys_addr_t top = memblock_end_of_DRAM(); | |
2018 | ||
2019 | top = roundup_pow_of_two(top); | |
2020 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
2021 | pe->pe_number, | |
2022 | window_id, | |
2023 | pe->tce_bypass_base, | |
2024 | top); | |
2025 | } else { | |
2026 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
2027 | pe->pe_number, | |
2028 | window_id, | |
2029 | pe->tce_bypass_base, | |
2030 | 0); | |
cd15b048 BH |
2031 | } |
2032 | if (rc) | |
2033 | pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); | |
2034 | else | |
2035 | pe->tce_bypass_enabled = enable; | |
2036 | } | |
2037 | ||
f87a8864 AK |
2038 | #ifdef CONFIG_IOMMU_API |
2039 | static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group) | |
cd15b048 | 2040 | { |
f87a8864 AK |
2041 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, |
2042 | table_group); | |
cd15b048 | 2043 | |
f87a8864 AK |
2044 | iommu_take_ownership(table_group->tables[0]); |
2045 | pnv_pci_ioda2_set_bypass(pe, false); | |
2046 | } | |
cd15b048 | 2047 | |
f87a8864 AK |
2048 | static void pnv_ioda2_release_ownership(struct iommu_table_group *table_group) |
2049 | { | |
2050 | struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe, | |
2051 | table_group); | |
2052 | ||
2053 | iommu_release_ownership(table_group->tables[0]); | |
2054 | pnv_pci_ioda2_set_bypass(pe, true); | |
cd15b048 BH |
2055 | } |
2056 | ||
f87a8864 AK |
2057 | static struct iommu_table_group_ops pnv_pci_ioda2_ops = { |
2058 | .take_ownership = pnv_ioda2_take_ownership, | |
2059 | .release_ownership = pnv_ioda2_release_ownership, | |
2060 | }; | |
2061 | #endif | |
2062 | ||
5780fb04 AK |
2063 | static void pnv_pci_ioda_setup_opal_tce_kill(struct pnv_phb *phb) |
2064 | { | |
2065 | const __be64 *swinvp; | |
2066 | ||
2067 | /* OPAL variant of PHB3 invalidated TCEs */ | |
2068 | swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); | |
2069 | if (!swinvp) | |
2070 | return; | |
2071 | ||
2072 | phb->ioda.tce_inval_reg_phys = be64_to_cpup(swinvp); | |
2073 | phb->ioda.tce_inval_reg = ioremap(phb->ioda.tce_inval_reg_phys, 8); | |
2074 | } | |
2075 | ||
aca6913f | 2076 | static __be64 *pnv_pci_ioda2_table_do_alloc_pages(int nid, unsigned shift) |
373f5657 GS |
2077 | { |
2078 | struct page *tce_mem = NULL; | |
aca6913f AK |
2079 | __be64 *addr; |
2080 | unsigned order = max_t(unsigned, shift, PAGE_SHIFT) - PAGE_SHIFT; | |
2081 | ||
2082 | tce_mem = alloc_pages_node(nid, GFP_KERNEL, order); | |
2083 | if (!tce_mem) { | |
2084 | pr_err("Failed to allocate a TCE memory, order=%d\n", order); | |
2085 | return NULL; | |
2086 | } | |
2087 | addr = page_address(tce_mem); | |
2088 | memset(addr, 0, 1UL << (order + PAGE_SHIFT)); | |
2089 | ||
2090 | return addr; | |
2091 | } | |
2092 | ||
2093 | static long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset, | |
2094 | __u32 page_shift, __u64 window_size, struct iommu_table *tbl) | |
2095 | { | |
373f5657 | 2096 | void *addr; |
aca6913f AK |
2097 | const unsigned window_shift = ilog2(window_size); |
2098 | unsigned entries_shift = window_shift - page_shift; | |
2099 | unsigned table_shift = max_t(unsigned, entries_shift + 3, PAGE_SHIFT); | |
2100 | const unsigned long tce_table_size = 1UL << table_shift; | |
2101 | ||
2102 | if ((window_size > memory_hotplug_max()) || !is_power_of_2(window_size)) | |
2103 | return -EINVAL; | |
2104 | ||
2105 | /* Allocate TCE table */ | |
2106 | addr = pnv_pci_ioda2_table_do_alloc_pages(nid, table_shift); | |
2107 | if (!addr) | |
2108 | return -ENOMEM; | |
2109 | ||
2110 | /* Setup linux iommu table */ | |
2111 | pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, bus_offset, | |
2112 | page_shift); | |
2113 | ||
2114 | pr_devel("Created TCE table: ws=%08llx ts=%lx @%08llx\n", | |
2115 | window_size, tce_table_size, bus_offset); | |
2116 | ||
2117 | return 0; | |
2118 | } | |
2119 | ||
2120 | static void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl) | |
2121 | { | |
2122 | if (!tbl->it_size) | |
2123 | return; | |
2124 | ||
2125 | free_pages(tbl->it_base, get_order(tbl->it_size << 3)); | |
2126 | } | |
2127 | ||
2128 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, | |
2129 | struct pnv_ioda_pe *pe) | |
2130 | { | |
373f5657 | 2131 | struct iommu_table *tbl; |
373f5657 GS |
2132 | int64_t rc; |
2133 | ||
2134 | /* We shouldn't already have a 32-bit DMA associated */ | |
2135 | if (WARN_ON(pe->tce32_seg >= 0)) | |
2136 | return; | |
2137 | ||
f87a8864 AK |
2138 | /* TVE #1 is selected by PCI address bit 59 */ |
2139 | pe->tce_bypass_base = 1ull << 59; | |
2140 | ||
0eaf4def | 2141 | tbl = pnv_pci_table_alloc(phb->hose->node); |
b348aa65 AK |
2142 | iommu_register_group(&pe->table_group, phb->hose->global_number, |
2143 | pe->pe_number); | |
0eaf4def | 2144 | pnv_pci_link_table_and_group(phb->hose->node, 0, tbl, &pe->table_group); |
c5773822 | 2145 | |
373f5657 GS |
2146 | /* The PE will reserve all possible 32-bits space */ |
2147 | pe->tce32_seg = 0; | |
373f5657 | 2148 | pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", |
aca6913f | 2149 | phb->ioda.m32_pci_base); |
373f5657 | 2150 | |
aca6913f AK |
2151 | /* Setup linux iommu table */ |
2152 | rc = pnv_pci_ioda2_table_alloc_pages(pe->phb->hose->node, | |
2153 | 0, IOMMU_PAGE_SHIFT_4K, phb->ioda.m32_pci_base, tbl); | |
2154 | if (rc) { | |
2155 | pe_err(pe, "Failed to create 32-bit TCE table, err %ld", rc); | |
373f5657 GS |
2156 | goto fail; |
2157 | } | |
e5aad1e6 AK |
2158 | |
2159 | tbl->it_ops = &pnv_ioda2_iommu_ops; | |
2160 | iommu_init_table(tbl, phb->hose->node); | |
2161 | #ifdef CONFIG_IOMMU_API | |
2162 | pe->table_group.ops = &pnv_pci_ioda2_ops; | |
2163 | #endif | |
2164 | ||
43cb60ab | 2165 | rc = pnv_pci_ioda2_set_window(&pe->table_group, 0, tbl); |
373f5657 GS |
2166 | if (rc) { |
2167 | pe_err(pe, "Failed to configure 32-bit TCE table," | |
2168 | " err %ld\n", rc); | |
2169 | goto fail; | |
2170 | } | |
2171 | ||
373f5657 | 2172 | /* OPAL variant of PHB3 invalidated TCEs */ |
5780fb04 | 2173 | if (phb->ioda.tce_inval_reg) |
65fd766b | 2174 | tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); |
5780fb04 | 2175 | |
781a868f | 2176 | if (pe->flags & PNV_IODA_PE_DEV) { |
4617082e AK |
2177 | /* |
2178 | * Setting table base here only for carrying iommu_group | |
2179 | * further down to let iommu_add_device() do the job. | |
2180 | * pnv_pci_ioda_dma_dev_setup will override it later anyway. | |
2181 | */ | |
2182 | set_iommu_table_base(&pe->pdev->dev, tbl); | |
2183 | iommu_add_device(&pe->pdev->dev); | |
c5773822 | 2184 | } else if (pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)) |
ea30e99e | 2185 | pnv_ioda_setup_bus_dma(pe, pe->pbus); |
74251fe2 | 2186 | |
cd15b048 | 2187 | /* Also create a bypass window */ |
4e287840 | 2188 | if (!pnv_iommu_bypass_disabled) |
f87a8864 | 2189 | pnv_pci_ioda2_set_bypass(pe, true); |
4e287840 | 2190 | |
373f5657 GS |
2191 | return; |
2192 | fail: | |
2193 | if (pe->tce32_seg >= 0) | |
2194 | pe->tce32_seg = -1; | |
0eaf4def | 2195 | if (tbl) { |
aca6913f | 2196 | pnv_pci_ioda2_table_free_pages(tbl); |
0eaf4def AK |
2197 | pnv_pci_unlink_table_and_group(tbl, &pe->table_group); |
2198 | iommu_free_table(tbl, "pnv"); | |
2199 | } | |
373f5657 GS |
2200 | } |
2201 | ||
cad5cef6 | 2202 | static void pnv_ioda_setup_dma(struct pnv_phb *phb) |
184cd4a3 BH |
2203 | { |
2204 | struct pci_controller *hose = phb->hose; | |
2205 | unsigned int residual, remaining, segs, tw, base; | |
2206 | struct pnv_ioda_pe *pe; | |
2207 | ||
2208 | /* If we have more PE# than segments available, hand out one | |
2209 | * per PE until we run out and let the rest fail. If not, | |
2210 | * then we assign at least one segment per PE, plus more based | |
2211 | * on the amount of devices under that PE | |
2212 | */ | |
2213 | if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) | |
2214 | residual = 0; | |
2215 | else | |
2216 | residual = phb->ioda.tce32_count - | |
2217 | phb->ioda.dma_pe_count; | |
2218 | ||
2219 | pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", | |
2220 | hose->global_number, phb->ioda.tce32_count); | |
2221 | pr_info("PCI: %d PE# for a total weight of %d\n", | |
2222 | phb->ioda.dma_pe_count, phb->ioda.dma_weight); | |
2223 | ||
5780fb04 AK |
2224 | pnv_pci_ioda_setup_opal_tce_kill(phb); |
2225 | ||
184cd4a3 BH |
2226 | /* Walk our PE list and configure their DMA segments, hand them |
2227 | * out one base segment plus any residual segments based on | |
2228 | * weight | |
2229 | */ | |
2230 | remaining = phb->ioda.tce32_count; | |
2231 | tw = phb->ioda.dma_weight; | |
2232 | base = 0; | |
7ebdf956 | 2233 | list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 BH |
2234 | if (!pe->dma_weight) |
2235 | continue; | |
2236 | if (!remaining) { | |
2237 | pe_warn(pe, "No DMA32 resources available\n"); | |
2238 | continue; | |
2239 | } | |
2240 | segs = 1; | |
2241 | if (residual) { | |
2242 | segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; | |
2243 | if (segs > remaining) | |
2244 | segs = remaining; | |
2245 | } | |
373f5657 GS |
2246 | |
2247 | /* | |
2248 | * For IODA2 compliant PHB3, we needn't care about the weight. | |
2249 | * The all available 32-bits DMA space will be assigned to | |
2250 | * the specific PE. | |
2251 | */ | |
2252 | if (phb->type == PNV_PHB_IODA1) { | |
2253 | pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", | |
2254 | pe->dma_weight, segs); | |
2255 | pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); | |
2256 | } else { | |
2257 | pe_info(pe, "Assign DMA32 space\n"); | |
2258 | segs = 0; | |
2259 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
2260 | } | |
2261 | ||
184cd4a3 BH |
2262 | remaining -= segs; |
2263 | base += segs; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | #ifdef CONFIG_PCI_MSI | |
137436c9 GS |
2268 | static void pnv_ioda2_msi_eoi(struct irq_data *d) |
2269 | { | |
2270 | unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); | |
2271 | struct irq_chip *chip = irq_data_get_irq_chip(d); | |
2272 | struct pnv_phb *phb = container_of(chip, struct pnv_phb, | |
2273 | ioda.irq_chip); | |
2274 | int64_t rc; | |
2275 | ||
2276 | rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); | |
2277 | WARN_ON_ONCE(rc); | |
2278 | ||
2279 | icp_native_eoi(d); | |
2280 | } | |
2281 | ||
fd9a1c26 IM |
2282 | |
2283 | static void set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq) | |
2284 | { | |
2285 | struct irq_data *idata; | |
2286 | struct irq_chip *ichip; | |
2287 | ||
2288 | if (phb->type != PNV_PHB_IODA2) | |
2289 | return; | |
2290 | ||
2291 | if (!phb->ioda.irq_chip_init) { | |
2292 | /* | |
2293 | * First time we setup an MSI IRQ, we need to setup the | |
2294 | * corresponding IRQ chip to route correctly. | |
2295 | */ | |
2296 | idata = irq_get_irq_data(virq); | |
2297 | ichip = irq_data_get_irq_chip(idata); | |
2298 | phb->ioda.irq_chip_init = 1; | |
2299 | phb->ioda.irq_chip = *ichip; | |
2300 | phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; | |
2301 | } | |
2302 | irq_set_chip(virq, &phb->ioda.irq_chip); | |
2303 | } | |
2304 | ||
80c49c7e IM |
2305 | #ifdef CONFIG_CXL_BASE |
2306 | ||
6f963ec2 | 2307 | struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev) |
80c49c7e IM |
2308 | { |
2309 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2310 | ||
6f963ec2 | 2311 | return of_node_get(hose->dn); |
80c49c7e | 2312 | } |
6f963ec2 | 2313 | EXPORT_SYMBOL(pnv_pci_get_phb_node); |
80c49c7e | 2314 | |
1212aa1c | 2315 | int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode) |
80c49c7e IM |
2316 | { |
2317 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2318 | struct pnv_phb *phb = hose->private_data; | |
2319 | struct pnv_ioda_pe *pe; | |
2320 | int rc; | |
2321 | ||
2322 | pe = pnv_ioda_get_pe(dev); | |
2323 | if (!pe) | |
2324 | return -ENODEV; | |
2325 | ||
2326 | pe_info(pe, "Switching PHB to CXL\n"); | |
2327 | ||
1212aa1c | 2328 | rc = opal_pci_set_phb_cxl_mode(phb->opal_id, mode, pe->pe_number); |
80c49c7e IM |
2329 | if (rc) |
2330 | dev_err(&dev->dev, "opal_pci_set_phb_cxl_mode failed: %i\n", rc); | |
2331 | ||
2332 | return rc; | |
2333 | } | |
1212aa1c | 2334 | EXPORT_SYMBOL(pnv_phb_to_cxl_mode); |
80c49c7e IM |
2335 | |
2336 | /* Find PHB for cxl dev and allocate MSI hwirqs? | |
2337 | * Returns the absolute hardware IRQ number | |
2338 | */ | |
2339 | int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num) | |
2340 | { | |
2341 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2342 | struct pnv_phb *phb = hose->private_data; | |
2343 | int hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, num); | |
2344 | ||
2345 | if (hwirq < 0) { | |
2346 | dev_warn(&dev->dev, "Failed to find a free MSI\n"); | |
2347 | return -ENOSPC; | |
2348 | } | |
2349 | ||
2350 | return phb->msi_base + hwirq; | |
2351 | } | |
2352 | EXPORT_SYMBOL(pnv_cxl_alloc_hwirqs); | |
2353 | ||
2354 | void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num) | |
2355 | { | |
2356 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2357 | struct pnv_phb *phb = hose->private_data; | |
2358 | ||
2359 | msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, num); | |
2360 | } | |
2361 | EXPORT_SYMBOL(pnv_cxl_release_hwirqs); | |
2362 | ||
2363 | void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs, | |
2364 | struct pci_dev *dev) | |
2365 | { | |
2366 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2367 | struct pnv_phb *phb = hose->private_data; | |
2368 | int i, hwirq; | |
2369 | ||
2370 | for (i = 1; i < CXL_IRQ_RANGES; i++) { | |
2371 | if (!irqs->range[i]) | |
2372 | continue; | |
2373 | pr_devel("cxl release irq range 0x%x: offset: 0x%lx limit: %ld\n", | |
2374 | i, irqs->offset[i], | |
2375 | irqs->range[i]); | |
2376 | hwirq = irqs->offset[i] - phb->msi_base; | |
2377 | msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, | |
2378 | irqs->range[i]); | |
2379 | } | |
2380 | } | |
2381 | EXPORT_SYMBOL(pnv_cxl_release_hwirq_ranges); | |
2382 | ||
2383 | int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs, | |
2384 | struct pci_dev *dev, int num) | |
2385 | { | |
2386 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2387 | struct pnv_phb *phb = hose->private_data; | |
2388 | int i, hwirq, try; | |
2389 | ||
2390 | memset(irqs, 0, sizeof(struct cxl_irq_ranges)); | |
2391 | ||
2392 | /* 0 is reserved for the multiplexed PSL DSI interrupt */ | |
2393 | for (i = 1; i < CXL_IRQ_RANGES && num; i++) { | |
2394 | try = num; | |
2395 | while (try) { | |
2396 | hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, try); | |
2397 | if (hwirq >= 0) | |
2398 | break; | |
2399 | try /= 2; | |
2400 | } | |
2401 | if (!try) | |
2402 | goto fail; | |
2403 | ||
2404 | irqs->offset[i] = phb->msi_base + hwirq; | |
2405 | irqs->range[i] = try; | |
2406 | pr_devel("cxl alloc irq range 0x%x: offset: 0x%lx limit: %li\n", | |
2407 | i, irqs->offset[i], irqs->range[i]); | |
2408 | num -= try; | |
2409 | } | |
2410 | if (num) | |
2411 | goto fail; | |
2412 | ||
2413 | return 0; | |
2414 | fail: | |
2415 | pnv_cxl_release_hwirq_ranges(irqs, dev); | |
2416 | return -ENOSPC; | |
2417 | } | |
2418 | EXPORT_SYMBOL(pnv_cxl_alloc_hwirq_ranges); | |
2419 | ||
2420 | int pnv_cxl_get_irq_count(struct pci_dev *dev) | |
2421 | { | |
2422 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2423 | struct pnv_phb *phb = hose->private_data; | |
2424 | ||
2425 | return phb->msi_bmp.irq_count; | |
2426 | } | |
2427 | EXPORT_SYMBOL(pnv_cxl_get_irq_count); | |
2428 | ||
2429 | int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, | |
2430 | unsigned int virq) | |
2431 | { | |
2432 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
2433 | struct pnv_phb *phb = hose->private_data; | |
2434 | unsigned int xive_num = hwirq - phb->msi_base; | |
2435 | struct pnv_ioda_pe *pe; | |
2436 | int rc; | |
2437 | ||
2438 | if (!(pe = pnv_ioda_get_pe(dev))) | |
2439 | return -ENODEV; | |
2440 | ||
2441 | /* Assign XIVE to PE */ | |
2442 | rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); | |
2443 | if (rc) { | |
2444 | pe_warn(pe, "%s: OPAL error %d setting msi_base 0x%x " | |
2445 | "hwirq 0x%x XIVE 0x%x PE\n", | |
2446 | pci_name(dev), rc, phb->msi_base, hwirq, xive_num); | |
2447 | return -EIO; | |
2448 | } | |
2449 | set_msi_irq_chip(phb, virq); | |
2450 | ||
2451 | return 0; | |
2452 | } | |
2453 | EXPORT_SYMBOL(pnv_cxl_ioda_msi_setup); | |
2454 | #endif | |
2455 | ||
184cd4a3 | 2456 | static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, |
137436c9 GS |
2457 | unsigned int hwirq, unsigned int virq, |
2458 | unsigned int is_64, struct msi_msg *msg) | |
184cd4a3 BH |
2459 | { |
2460 | struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); | |
2461 | unsigned int xive_num = hwirq - phb->msi_base; | |
3a1a4661 | 2462 | __be32 data; |
184cd4a3 BH |
2463 | int rc; |
2464 | ||
2465 | /* No PE assigned ? bail out ... no MSI for you ! */ | |
2466 | if (pe == NULL) | |
2467 | return -ENXIO; | |
2468 | ||
2469 | /* Check if we have an MVE */ | |
2470 | if (pe->mve_number < 0) | |
2471 | return -ENXIO; | |
2472 | ||
b72c1f65 | 2473 | /* Force 32-bit MSI on some broken devices */ |
36074381 | 2474 | if (dev->no_64bit_msi) |
b72c1f65 BH |
2475 | is_64 = 0; |
2476 | ||
184cd4a3 BH |
2477 | /* Assign XIVE to PE */ |
2478 | rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); | |
2479 | if (rc) { | |
2480 | pr_warn("%s: OPAL error %d setting XIVE %d PE\n", | |
2481 | pci_name(dev), rc, xive_num); | |
2482 | return -EIO; | |
2483 | } | |
2484 | ||
2485 | if (is_64) { | |
3a1a4661 BH |
2486 | __be64 addr64; |
2487 | ||
184cd4a3 BH |
2488 | rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, |
2489 | &addr64, &data); | |
2490 | if (rc) { | |
2491 | pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", | |
2492 | pci_name(dev), rc); | |
2493 | return -EIO; | |
2494 | } | |
3a1a4661 BH |
2495 | msg->address_hi = be64_to_cpu(addr64) >> 32; |
2496 | msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; | |
184cd4a3 | 2497 | } else { |
3a1a4661 BH |
2498 | __be32 addr32; |
2499 | ||
184cd4a3 BH |
2500 | rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, |
2501 | &addr32, &data); | |
2502 | if (rc) { | |
2503 | pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", | |
2504 | pci_name(dev), rc); | |
2505 | return -EIO; | |
2506 | } | |
2507 | msg->address_hi = 0; | |
3a1a4661 | 2508 | msg->address_lo = be32_to_cpu(addr32); |
184cd4a3 | 2509 | } |
3a1a4661 | 2510 | msg->data = be32_to_cpu(data); |
184cd4a3 | 2511 | |
fd9a1c26 | 2512 | set_msi_irq_chip(phb, virq); |
137436c9 | 2513 | |
184cd4a3 BH |
2514 | pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," |
2515 | " address=%x_%08x data=%x PE# %d\n", | |
2516 | pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, | |
2517 | msg->address_hi, msg->address_lo, data, pe->pe_number); | |
2518 | ||
2519 | return 0; | |
2520 | } | |
2521 | ||
2522 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) | |
2523 | { | |
fb1b55d6 | 2524 | unsigned int count; |
184cd4a3 BH |
2525 | const __be32 *prop = of_get_property(phb->hose->dn, |
2526 | "ibm,opal-msi-ranges", NULL); | |
2527 | if (!prop) { | |
2528 | /* BML Fallback */ | |
2529 | prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); | |
2530 | } | |
2531 | if (!prop) | |
2532 | return; | |
2533 | ||
2534 | phb->msi_base = be32_to_cpup(prop); | |
fb1b55d6 GS |
2535 | count = be32_to_cpup(prop + 1); |
2536 | if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { | |
184cd4a3 BH |
2537 | pr_err("PCI %d: Failed to allocate MSI bitmap !\n", |
2538 | phb->hose->global_number); | |
2539 | return; | |
2540 | } | |
fb1b55d6 | 2541 | |
184cd4a3 BH |
2542 | phb->msi_setup = pnv_pci_ioda_msi_setup; |
2543 | phb->msi32_support = 1; | |
2544 | pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", | |
fb1b55d6 | 2545 | count, phb->msi_base); |
184cd4a3 BH |
2546 | } |
2547 | #else | |
2548 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } | |
2549 | #endif /* CONFIG_PCI_MSI */ | |
2550 | ||
6e628c7d WY |
2551 | #ifdef CONFIG_PCI_IOV |
2552 | static void pnv_pci_ioda_fixup_iov_resources(struct pci_dev *pdev) | |
2553 | { | |
2554 | struct pci_controller *hose; | |
2555 | struct pnv_phb *phb; | |
2556 | struct resource *res; | |
2557 | int i; | |
2558 | resource_size_t size; | |
2559 | struct pci_dn *pdn; | |
5b88ec22 | 2560 | int mul, total_vfs; |
6e628c7d WY |
2561 | |
2562 | if (!pdev->is_physfn || pdev->is_added) | |
2563 | return; | |
2564 | ||
2565 | hose = pci_bus_to_host(pdev->bus); | |
2566 | phb = hose->private_data; | |
2567 | ||
2568 | pdn = pci_get_pdn(pdev); | |
2569 | pdn->vfs_expanded = 0; | |
2570 | ||
5b88ec22 WY |
2571 | total_vfs = pci_sriov_get_totalvfs(pdev); |
2572 | pdn->m64_per_iov = 1; | |
2573 | mul = phb->ioda.total_pe; | |
2574 | ||
2575 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { | |
2576 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
2577 | if (!res->flags || res->parent) | |
2578 | continue; | |
2579 | if (!pnv_pci_is_mem_pref_64(res->flags)) { | |
2580 | dev_warn(&pdev->dev, " non M64 VF BAR%d: %pR\n", | |
2581 | i, res); | |
2582 | continue; | |
2583 | } | |
2584 | ||
2585 | size = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES); | |
2586 | ||
2587 | /* bigger than 64M */ | |
2588 | if (size > (1 << 26)) { | |
2589 | dev_info(&pdev->dev, "PowerNV: VF BAR%d: %pR IOV size is bigger than 64M, roundup power2\n", | |
2590 | i, res); | |
2591 | pdn->m64_per_iov = M64_PER_IOV; | |
2592 | mul = roundup_pow_of_two(total_vfs); | |
2593 | break; | |
2594 | } | |
2595 | } | |
2596 | ||
6e628c7d WY |
2597 | for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { |
2598 | res = &pdev->resource[i + PCI_IOV_RESOURCES]; | |
2599 | if (!res->flags || res->parent) | |
2600 | continue; | |
2601 | if (!pnv_pci_is_mem_pref_64(res->flags)) { | |
2602 | dev_warn(&pdev->dev, "Skipping expanding VF BAR%d: %pR\n", | |
2603 | i, res); | |
2604 | continue; | |
2605 | } | |
2606 | ||
2607 | dev_dbg(&pdev->dev, " Fixing VF BAR%d: %pR to\n", i, res); | |
2608 | size = pci_iov_resource_size(pdev, i + PCI_IOV_RESOURCES); | |
5b88ec22 | 2609 | res->end = res->start + size * mul - 1; |
6e628c7d WY |
2610 | dev_dbg(&pdev->dev, " %pR\n", res); |
2611 | dev_info(&pdev->dev, "VF BAR%d: %pR (expanded to %d VFs for PE alignment)", | |
5b88ec22 | 2612 | i, res, mul); |
6e628c7d | 2613 | } |
5b88ec22 | 2614 | pdn->vfs_expanded = mul; |
6e628c7d WY |
2615 | } |
2616 | #endif /* CONFIG_PCI_IOV */ | |
2617 | ||
11685bec GS |
2618 | /* |
2619 | * This function is supposed to be called on basis of PE from top | |
2620 | * to bottom style. So the the I/O or MMIO segment assigned to | |
2621 | * parent PE could be overrided by its child PEs if necessary. | |
2622 | */ | |
cad5cef6 GKH |
2623 | static void pnv_ioda_setup_pe_seg(struct pci_controller *hose, |
2624 | struct pnv_ioda_pe *pe) | |
11685bec GS |
2625 | { |
2626 | struct pnv_phb *phb = hose->private_data; | |
2627 | struct pci_bus_region region; | |
2628 | struct resource *res; | |
2629 | int i, index; | |
2630 | int rc; | |
2631 | ||
2632 | /* | |
2633 | * NOTE: We only care PCI bus based PE for now. For PCI | |
2634 | * device based PE, for example SRIOV sensitive VF should | |
2635 | * be figured out later. | |
2636 | */ | |
2637 | BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); | |
2638 | ||
2639 | pci_bus_for_each_resource(pe->pbus, res, i) { | |
2640 | if (!res || !res->flags || | |
2641 | res->start > res->end) | |
2642 | continue; | |
2643 | ||
2644 | if (res->flags & IORESOURCE_IO) { | |
2645 | region.start = res->start - phb->ioda.io_pci_base; | |
2646 | region.end = res->end - phb->ioda.io_pci_base; | |
2647 | index = region.start / phb->ioda.io_segsize; | |
2648 | ||
2649 | while (index < phb->ioda.total_pe && | |
2650 | region.start <= region.end) { | |
2651 | phb->ioda.io_segmap[index] = pe->pe_number; | |
2652 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
2653 | pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); | |
2654 | if (rc != OPAL_SUCCESS) { | |
2655 | pr_err("%s: OPAL error %d when mapping IO " | |
2656 | "segment #%d to PE#%d\n", | |
2657 | __func__, rc, index, pe->pe_number); | |
2658 | break; | |
2659 | } | |
2660 | ||
2661 | region.start += phb->ioda.io_segsize; | |
2662 | index++; | |
2663 | } | |
027fa02f GS |
2664 | } else if ((res->flags & IORESOURCE_MEM) && |
2665 | !pnv_pci_is_mem_pref_64(res->flags)) { | |
11685bec | 2666 | region.start = res->start - |
3fd47f06 | 2667 | hose->mem_offset[0] - |
11685bec GS |
2668 | phb->ioda.m32_pci_base; |
2669 | region.end = res->end - | |
3fd47f06 | 2670 | hose->mem_offset[0] - |
11685bec GS |
2671 | phb->ioda.m32_pci_base; |
2672 | index = region.start / phb->ioda.m32_segsize; | |
2673 | ||
2674 | while (index < phb->ioda.total_pe && | |
2675 | region.start <= region.end) { | |
2676 | phb->ioda.m32_segmap[index] = pe->pe_number; | |
2677 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
2678 | pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); | |
2679 | if (rc != OPAL_SUCCESS) { | |
2680 | pr_err("%s: OPAL error %d when mapping M32 " | |
2681 | "segment#%d to PE#%d", | |
2682 | __func__, rc, index, pe->pe_number); | |
2683 | break; | |
2684 | } | |
2685 | ||
2686 | region.start += phb->ioda.m32_segsize; | |
2687 | index++; | |
2688 | } | |
2689 | } | |
2690 | } | |
2691 | } | |
2692 | ||
cad5cef6 | 2693 | static void pnv_pci_ioda_setup_seg(void) |
11685bec GS |
2694 | { |
2695 | struct pci_controller *tmp, *hose; | |
2696 | struct pnv_phb *phb; | |
2697 | struct pnv_ioda_pe *pe; | |
2698 | ||
2699 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
2700 | phb = hose->private_data; | |
2701 | list_for_each_entry(pe, &phb->ioda.pe_list, list) { | |
2702 | pnv_ioda_setup_pe_seg(hose, pe); | |
2703 | } | |
2704 | } | |
2705 | } | |
2706 | ||
cad5cef6 | 2707 | static void pnv_pci_ioda_setup_DMA(void) |
13395c48 GS |
2708 | { |
2709 | struct pci_controller *hose, *tmp; | |
db1266c8 | 2710 | struct pnv_phb *phb; |
13395c48 GS |
2711 | |
2712 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
2713 | pnv_ioda_setup_dma(hose->private_data); | |
db1266c8 GS |
2714 | |
2715 | /* Mark the PHB initialization done */ | |
2716 | phb = hose->private_data; | |
2717 | phb->initialized = 1; | |
13395c48 GS |
2718 | } |
2719 | } | |
2720 | ||
37c367f2 GS |
2721 | static void pnv_pci_ioda_create_dbgfs(void) |
2722 | { | |
2723 | #ifdef CONFIG_DEBUG_FS | |
2724 | struct pci_controller *hose, *tmp; | |
2725 | struct pnv_phb *phb; | |
2726 | char name[16]; | |
2727 | ||
2728 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
2729 | phb = hose->private_data; | |
2730 | ||
2731 | sprintf(name, "PCI%04x", hose->global_number); | |
2732 | phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); | |
2733 | if (!phb->dbgfs) | |
2734 | pr_warning("%s: Error on creating debugfs on PHB#%x\n", | |
2735 | __func__, hose->global_number); | |
2736 | } | |
2737 | #endif /* CONFIG_DEBUG_FS */ | |
2738 | } | |
2739 | ||
cad5cef6 | 2740 | static void pnv_pci_ioda_fixup(void) |
fb446ad0 GS |
2741 | { |
2742 | pnv_pci_ioda_setup_PEs(); | |
11685bec | 2743 | pnv_pci_ioda_setup_seg(); |
13395c48 | 2744 | pnv_pci_ioda_setup_DMA(); |
e9cc17d4 | 2745 | |
37c367f2 GS |
2746 | pnv_pci_ioda_create_dbgfs(); |
2747 | ||
e9cc17d4 | 2748 | #ifdef CONFIG_EEH |
e9cc17d4 | 2749 | eeh_init(); |
dadcd6d6 | 2750 | eeh_addr_cache_build(); |
e9cc17d4 | 2751 | #endif |
fb446ad0 GS |
2752 | } |
2753 | ||
271fd03a GS |
2754 | /* |
2755 | * Returns the alignment for I/O or memory windows for P2P | |
2756 | * bridges. That actually depends on how PEs are segmented. | |
2757 | * For now, we return I/O or M32 segment size for PE sensitive | |
2758 | * P2P bridges. Otherwise, the default values (4KiB for I/O, | |
2759 | * 1MiB for memory) will be returned. | |
2760 | * | |
2761 | * The current PCI bus might be put into one PE, which was | |
2762 | * create against the parent PCI bridge. For that case, we | |
2763 | * needn't enlarge the alignment so that we can save some | |
2764 | * resources. | |
2765 | */ | |
2766 | static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, | |
2767 | unsigned long type) | |
2768 | { | |
2769 | struct pci_dev *bridge; | |
2770 | struct pci_controller *hose = pci_bus_to_host(bus); | |
2771 | struct pnv_phb *phb = hose->private_data; | |
2772 | int num_pci_bridges = 0; | |
2773 | ||
2774 | bridge = bus->self; | |
2775 | while (bridge) { | |
2776 | if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { | |
2777 | num_pci_bridges++; | |
2778 | if (num_pci_bridges >= 2) | |
2779 | return 1; | |
2780 | } | |
2781 | ||
2782 | bridge = bridge->bus->self; | |
2783 | } | |
2784 | ||
262af557 GC |
2785 | /* We fail back to M32 if M64 isn't supported */ |
2786 | if (phb->ioda.m64_segsize && | |
2787 | pnv_pci_is_mem_pref_64(type)) | |
2788 | return phb->ioda.m64_segsize; | |
271fd03a GS |
2789 | if (type & IORESOURCE_MEM) |
2790 | return phb->ioda.m32_segsize; | |
2791 | ||
2792 | return phb->ioda.io_segsize; | |
2793 | } | |
2794 | ||
5350ab3f WY |
2795 | #ifdef CONFIG_PCI_IOV |
2796 | static resource_size_t pnv_pci_iov_resource_alignment(struct pci_dev *pdev, | |
2797 | int resno) | |
2798 | { | |
2799 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
2800 | resource_size_t align, iov_align; | |
2801 | ||
2802 | iov_align = resource_size(&pdev->resource[resno]); | |
2803 | if (iov_align) | |
2804 | return iov_align; | |
2805 | ||
2806 | align = pci_iov_resource_size(pdev, resno); | |
2807 | if (pdn->vfs_expanded) | |
2808 | return pdn->vfs_expanded * align; | |
2809 | ||
2810 | return align; | |
2811 | } | |
2812 | #endif /* CONFIG_PCI_IOV */ | |
2813 | ||
184cd4a3 BH |
2814 | /* Prevent enabling devices for which we couldn't properly |
2815 | * assign a PE | |
2816 | */ | |
c88c2a18 | 2817 | static bool pnv_pci_enable_device_hook(struct pci_dev *dev) |
184cd4a3 | 2818 | { |
db1266c8 GS |
2819 | struct pci_controller *hose = pci_bus_to_host(dev->bus); |
2820 | struct pnv_phb *phb = hose->private_data; | |
2821 | struct pci_dn *pdn; | |
184cd4a3 | 2822 | |
db1266c8 GS |
2823 | /* The function is probably called while the PEs have |
2824 | * not be created yet. For example, resource reassignment | |
2825 | * during PCI probe period. We just skip the check if | |
2826 | * PEs isn't ready. | |
2827 | */ | |
2828 | if (!phb->initialized) | |
c88c2a18 | 2829 | return true; |
db1266c8 | 2830 | |
b72c1f65 | 2831 | pdn = pci_get_pdn(dev); |
184cd4a3 | 2832 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) |
c88c2a18 | 2833 | return false; |
db1266c8 | 2834 | |
c88c2a18 | 2835 | return true; |
184cd4a3 BH |
2836 | } |
2837 | ||
2838 | static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, | |
2839 | u32 devfn) | |
2840 | { | |
2841 | return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; | |
2842 | } | |
2843 | ||
7a8e6bbf | 2844 | static void pnv_pci_ioda_shutdown(struct pci_controller *hose) |
73ed148a | 2845 | { |
7a8e6bbf MN |
2846 | struct pnv_phb *phb = hose->private_data; |
2847 | ||
d1a85eee | 2848 | opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE, |
73ed148a BH |
2849 | OPAL_ASSERT_RESET); |
2850 | } | |
2851 | ||
92ae0353 DA |
2852 | static const struct pci_controller_ops pnv_pci_ioda_controller_ops = { |
2853 | .dma_dev_setup = pnv_pci_dma_dev_setup, | |
2854 | #ifdef CONFIG_PCI_MSI | |
2855 | .setup_msi_irqs = pnv_setup_msi_irqs, | |
2856 | .teardown_msi_irqs = pnv_teardown_msi_irqs, | |
2857 | #endif | |
2858 | .enable_device_hook = pnv_pci_enable_device_hook, | |
2859 | .window_alignment = pnv_pci_window_alignment, | |
2860 | .reset_secondary_bus = pnv_pci_reset_secondary_bus, | |
763d2d8d | 2861 | .dma_set_mask = pnv_pci_ioda_dma_set_mask, |
7a8e6bbf | 2862 | .shutdown = pnv_pci_ioda_shutdown, |
92ae0353 DA |
2863 | }; |
2864 | ||
e51df2c1 AB |
2865 | static void __init pnv_pci_init_ioda_phb(struct device_node *np, |
2866 | u64 hub_id, int ioda_type) | |
184cd4a3 BH |
2867 | { |
2868 | struct pci_controller *hose; | |
184cd4a3 | 2869 | struct pnv_phb *phb; |
8184616f | 2870 | unsigned long size, m32map_off, pemap_off, iomap_off = 0; |
c681b93c | 2871 | const __be64 *prop64; |
3a1a4661 | 2872 | const __be32 *prop32; |
f1b7cc3e | 2873 | int len; |
184cd4a3 BH |
2874 | u64 phb_id; |
2875 | void *aux; | |
2876 | long rc; | |
2877 | ||
58d714ec | 2878 | pr_info("Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); |
184cd4a3 BH |
2879 | |
2880 | prop64 = of_get_property(np, "ibm,opal-phbid", NULL); | |
2881 | if (!prop64) { | |
2882 | pr_err(" Missing \"ibm,opal-phbid\" property !\n"); | |
2883 | return; | |
2884 | } | |
2885 | phb_id = be64_to_cpup(prop64); | |
2886 | pr_debug(" PHB-ID : 0x%016llx\n", phb_id); | |
2887 | ||
e39f223f | 2888 | phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0); |
58d714ec GS |
2889 | |
2890 | /* Allocate PCI controller */ | |
58d714ec GS |
2891 | phb->hose = hose = pcibios_alloc_controller(np); |
2892 | if (!phb->hose) { | |
2893 | pr_err(" Can't allocate PCI controller for %s\n", | |
184cd4a3 | 2894 | np->full_name); |
e39f223f | 2895 | memblock_free(__pa(phb), sizeof(struct pnv_phb)); |
184cd4a3 BH |
2896 | return; |
2897 | } | |
2898 | ||
2899 | spin_lock_init(&phb->lock); | |
f1b7cc3e GS |
2900 | prop32 = of_get_property(np, "bus-range", &len); |
2901 | if (prop32 && len == 8) { | |
3a1a4661 BH |
2902 | hose->first_busno = be32_to_cpu(prop32[0]); |
2903 | hose->last_busno = be32_to_cpu(prop32[1]); | |
f1b7cc3e GS |
2904 | } else { |
2905 | pr_warn(" Broken <bus-range> on %s\n", np->full_name); | |
2906 | hose->first_busno = 0; | |
2907 | hose->last_busno = 0xff; | |
2908 | } | |
184cd4a3 | 2909 | hose->private_data = phb; |
e9cc17d4 | 2910 | phb->hub_id = hub_id; |
184cd4a3 | 2911 | phb->opal_id = phb_id; |
aa0c033f | 2912 | phb->type = ioda_type; |
781a868f | 2913 | mutex_init(&phb->ioda.pe_alloc_mutex); |
184cd4a3 | 2914 | |
cee72d5b BH |
2915 | /* Detect specific models for error handling */ |
2916 | if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) | |
2917 | phb->model = PNV_PHB_MODEL_P7IOC; | |
f3d40c25 | 2918 | else if (of_device_is_compatible(np, "ibm,power8-pciex")) |
aa0c033f | 2919 | phb->model = PNV_PHB_MODEL_PHB3; |
cee72d5b BH |
2920 | else |
2921 | phb->model = PNV_PHB_MODEL_UNKNOWN; | |
2922 | ||
aa0c033f | 2923 | /* Parse 32-bit and IO ranges (if any) */ |
2f1ec02e | 2924 | pci_process_bridge_OF_ranges(hose, np, !hose->global_number); |
184cd4a3 | 2925 | |
aa0c033f | 2926 | /* Get registers */ |
184cd4a3 BH |
2927 | phb->regs = of_iomap(np, 0); |
2928 | if (phb->regs == NULL) | |
2929 | pr_err(" Failed to map registers !\n"); | |
2930 | ||
184cd4a3 | 2931 | /* Initialize more IODA stuff */ |
36954dc7 | 2932 | phb->ioda.total_pe = 1; |
aa0c033f | 2933 | prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); |
36954dc7 | 2934 | if (prop32) |
3a1a4661 | 2935 | phb->ioda.total_pe = be32_to_cpup(prop32); |
36954dc7 GS |
2936 | prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); |
2937 | if (prop32) | |
2938 | phb->ioda.reserved_pe = be32_to_cpup(prop32); | |
262af557 GC |
2939 | |
2940 | /* Parse 64-bit MMIO range */ | |
2941 | pnv_ioda_parse_m64_window(phb); | |
2942 | ||
184cd4a3 | 2943 | phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); |
aa0c033f | 2944 | /* FW Has already off top 64k of M32 space (MSI space) */ |
184cd4a3 BH |
2945 | phb->ioda.m32_size += 0x10000; |
2946 | ||
2947 | phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; | |
3fd47f06 | 2948 | phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; |
184cd4a3 BH |
2949 | phb->ioda.io_size = hose->pci_io_size; |
2950 | phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; | |
2951 | phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ | |
2952 | ||
c35d2a8c | 2953 | /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ |
184cd4a3 BH |
2954 | size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); |
2955 | m32map_off = size; | |
e47747f4 | 2956 | size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]); |
c35d2a8c GS |
2957 | if (phb->type == PNV_PHB_IODA1) { |
2958 | iomap_off = size; | |
2959 | size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]); | |
2960 | } | |
184cd4a3 BH |
2961 | pemap_off = size; |
2962 | size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); | |
e39f223f | 2963 | aux = memblock_virt_alloc(size, 0); |
184cd4a3 BH |
2964 | phb->ioda.pe_alloc = aux; |
2965 | phb->ioda.m32_segmap = aux + m32map_off; | |
c35d2a8c GS |
2966 | if (phb->type == PNV_PHB_IODA1) |
2967 | phb->ioda.io_segmap = aux + iomap_off; | |
184cd4a3 | 2968 | phb->ioda.pe_array = aux + pemap_off; |
36954dc7 | 2969 | set_bit(phb->ioda.reserved_pe, phb->ioda.pe_alloc); |
184cd4a3 | 2970 | |
7ebdf956 | 2971 | INIT_LIST_HEAD(&phb->ioda.pe_dma_list); |
184cd4a3 | 2972 | INIT_LIST_HEAD(&phb->ioda.pe_list); |
781a868f | 2973 | mutex_init(&phb->ioda.pe_list_mutex); |
184cd4a3 BH |
2974 | |
2975 | /* Calculate how many 32-bit TCE segments we have */ | |
2976 | phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; | |
2977 | ||
aa0c033f | 2978 | #if 0 /* We should really do that ... */ |
184cd4a3 BH |
2979 | rc = opal_pci_set_phb_mem_window(opal->phb_id, |
2980 | window_type, | |
2981 | window_num, | |
2982 | starting_real_address, | |
2983 | starting_pci_address, | |
2984 | segment_size); | |
2985 | #endif | |
2986 | ||
262af557 GC |
2987 | pr_info(" %03d (%03d) PE's M32: 0x%x [segment=0x%x]\n", |
2988 | phb->ioda.total_pe, phb->ioda.reserved_pe, | |
2989 | phb->ioda.m32_size, phb->ioda.m32_segsize); | |
2990 | if (phb->ioda.m64_size) | |
2991 | pr_info(" M64: 0x%lx [segment=0x%lx]\n", | |
2992 | phb->ioda.m64_size, phb->ioda.m64_segsize); | |
2993 | if (phb->ioda.io_size) | |
2994 | pr_info(" IO: 0x%x [segment=0x%x]\n", | |
2995 | phb->ioda.io_size, phb->ioda.io_segsize); | |
2996 | ||
184cd4a3 | 2997 | |
184cd4a3 | 2998 | phb->hose->ops = &pnv_pci_ops; |
49dec922 GS |
2999 | phb->get_pe_state = pnv_ioda_get_pe_state; |
3000 | phb->freeze_pe = pnv_ioda_freeze_pe; | |
3001 | phb->unfreeze_pe = pnv_ioda_unfreeze_pe; | |
184cd4a3 BH |
3002 | |
3003 | /* Setup RID -> PE mapping function */ | |
3004 | phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; | |
3005 | ||
3006 | /* Setup TCEs */ | |
3007 | phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; | |
fe7e85c6 | 3008 | phb->dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask; |
184cd4a3 BH |
3009 | |
3010 | /* Setup MSI support */ | |
3011 | pnv_pci_init_ioda_msis(phb); | |
3012 | ||
c40a4210 GS |
3013 | /* |
3014 | * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here | |
3015 | * to let the PCI core do resource assignment. It's supposed | |
3016 | * that the PCI core will do correct I/O and MMIO alignment | |
3017 | * for the P2P bridge bars so that each PCI bus (excluding | |
3018 | * the child P2P bridges) can form individual PE. | |
184cd4a3 | 3019 | */ |
fb446ad0 | 3020 | ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; |
92ae0353 | 3021 | hose->controller_ops = pnv_pci_ioda_controller_ops; |
ad30cb99 | 3022 | |
6e628c7d WY |
3023 | #ifdef CONFIG_PCI_IOV |
3024 | ppc_md.pcibios_fixup_sriov = pnv_pci_ioda_fixup_iov_resources; | |
5350ab3f | 3025 | ppc_md.pcibios_iov_resource_alignment = pnv_pci_iov_resource_alignment; |
ad30cb99 ME |
3026 | #endif |
3027 | ||
c40a4210 | 3028 | pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
184cd4a3 BH |
3029 | |
3030 | /* Reset IODA tables to a clean state */ | |
d1a85eee | 3031 | rc = opal_pci_reset(phb_id, OPAL_RESET_PCI_IODA_TABLE, OPAL_ASSERT_RESET); |
184cd4a3 | 3032 | if (rc) |
f11fe552 | 3033 | pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); |
361f2a2a GS |
3034 | |
3035 | /* If we're running in kdump kerenl, the previous kerenl never | |
3036 | * shutdown PCI devices correctly. We already got IODA table | |
3037 | * cleaned out. So we have to issue PHB reset to stop all PCI | |
3038 | * transactions from previous kerenl. | |
3039 | */ | |
3040 | if (is_kdump_kernel()) { | |
3041 | pr_info(" Issue PHB reset ...\n"); | |
cadf364d GS |
3042 | pnv_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); |
3043 | pnv_eeh_phb_reset(hose, EEH_RESET_DEACTIVATE); | |
361f2a2a | 3044 | } |
262af557 | 3045 | |
9e9e8935 GS |
3046 | /* Remove M64 resource if we can't configure it successfully */ |
3047 | if (!phb->init_m64 || phb->init_m64(phb)) | |
262af557 | 3048 | hose->mem_resources[1].flags = 0; |
aa0c033f GS |
3049 | } |
3050 | ||
67975005 | 3051 | void __init pnv_pci_init_ioda2_phb(struct device_node *np) |
aa0c033f | 3052 | { |
e9cc17d4 | 3053 | pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); |
184cd4a3 BH |
3054 | } |
3055 | ||
3056 | void __init pnv_pci_init_ioda_hub(struct device_node *np) | |
3057 | { | |
3058 | struct device_node *phbn; | |
c681b93c | 3059 | const __be64 *prop64; |
184cd4a3 BH |
3060 | u64 hub_id; |
3061 | ||
3062 | pr_info("Probing IODA IO-Hub %s\n", np->full_name); | |
3063 | ||
3064 | prop64 = of_get_property(np, "ibm,opal-hubid", NULL); | |
3065 | if (!prop64) { | |
3066 | pr_err(" Missing \"ibm,opal-hubid\" property !\n"); | |
3067 | return; | |
3068 | } | |
3069 | hub_id = be64_to_cpup(prop64); | |
3070 | pr_devel(" HUB-ID : 0x%016llx\n", hub_id); | |
3071 | ||
3072 | /* Count child PHBs */ | |
3073 | for_each_child_of_node(np, phbn) { | |
3074 | /* Look for IODA1 PHBs */ | |
3075 | if (of_device_is_compatible(phbn, "ibm,ioda-phb")) | |
e9cc17d4 | 3076 | pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); |
184cd4a3 BH |
3077 | } |
3078 | } |