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61305a96 BH |
1 | /* |
2 | * Support PCI/PCIe on PowerNV platforms | |
3 | * | |
4 | * Currently supports only P5IOC2 | |
5 | * | |
6 | * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/kernel.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/bootmem.h> | |
20 | #include <linux/irq.h> | |
21 | #include <linux/io.h> | |
c1a2562a | 22 | #include <linux/msi.h> |
4e13c1ac | 23 | #include <linux/iommu.h> |
61305a96 BH |
24 | |
25 | #include <asm/sections.h> | |
26 | #include <asm/io.h> | |
27 | #include <asm/prom.h> | |
28 | #include <asm/pci-bridge.h> | |
29 | #include <asm/machdep.h> | |
fb1b55d6 | 30 | #include <asm/msi_bitmap.h> |
61305a96 BH |
31 | #include <asm/ppc-pci.h> |
32 | #include <asm/opal.h> | |
33 | #include <asm/iommu.h> | |
34 | #include <asm/tce.h> | |
f5339277 | 35 | #include <asm/firmware.h> |
be7e7446 GS |
36 | #include <asm/eeh_event.h> |
37 | #include <asm/eeh.h> | |
61305a96 BH |
38 | |
39 | #include "powernv.h" | |
40 | #include "pci.h" | |
41 | ||
82ba129b BH |
42 | /* Delay in usec */ |
43 | #define PCI_RESET_DELAY_US 3000000 | |
61305a96 BH |
44 | |
45 | #define cfg_dbg(fmt...) do { } while(0) | |
46 | //#define cfg_dbg(fmt...) printk(fmt) | |
47 | ||
c1a2562a BH |
48 | #ifdef CONFIG_PCI_MSI |
49 | static int pnv_msi_check_device(struct pci_dev* pdev, int nvec, int type) | |
50 | { | |
51 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
52 | struct pnv_phb *phb = hose->private_data; | |
b72c1f65 BH |
53 | struct pci_dn *pdn = pci_get_pdn(pdev); |
54 | ||
55 | if (pdn && pdn->force_32bit_msi && !phb->msi32_support) | |
56 | return -ENODEV; | |
c1a2562a | 57 | |
fb1b55d6 | 58 | return (phb && phb->msi_bmp.bitmap) ? 0 : -ENODEV; |
c1a2562a BH |
59 | } |
60 | ||
61 | static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) | |
62 | { | |
63 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
64 | struct pnv_phb *phb = hose->private_data; | |
65 | struct msi_desc *entry; | |
66 | struct msi_msg msg; | |
fb1b55d6 GS |
67 | int hwirq; |
68 | unsigned int virq; | |
c1a2562a BH |
69 | int rc; |
70 | ||
71 | if (WARN_ON(!phb)) | |
72 | return -ENODEV; | |
73 | ||
74 | list_for_each_entry(entry, &pdev->msi_list, list) { | |
75 | if (!entry->msi_attrib.is_64 && !phb->msi32_support) { | |
76 | pr_warn("%s: Supports only 64-bit MSIs\n", | |
77 | pci_name(pdev)); | |
78 | return -ENXIO; | |
79 | } | |
fb1b55d6 GS |
80 | hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, 1); |
81 | if (hwirq < 0) { | |
c1a2562a BH |
82 | pr_warn("%s: Failed to find a free MSI\n", |
83 | pci_name(pdev)); | |
84 | return -ENOSPC; | |
85 | } | |
fb1b55d6 | 86 | virq = irq_create_mapping(NULL, phb->msi_base + hwirq); |
c1a2562a BH |
87 | if (virq == NO_IRQ) { |
88 | pr_warn("%s: Failed to map MSI to linux irq\n", | |
89 | pci_name(pdev)); | |
fb1b55d6 | 90 | msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, 1); |
c1a2562a BH |
91 | return -ENOMEM; |
92 | } | |
fb1b55d6 | 93 | rc = phb->msi_setup(phb, pdev, phb->msi_base + hwirq, |
137436c9 | 94 | virq, entry->msi_attrib.is_64, &msg); |
c1a2562a BH |
95 | if (rc) { |
96 | pr_warn("%s: Failed to setup MSI\n", pci_name(pdev)); | |
97 | irq_dispose_mapping(virq); | |
fb1b55d6 | 98 | msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, 1); |
c1a2562a BH |
99 | return rc; |
100 | } | |
101 | irq_set_msi_desc(virq, entry); | |
102 | write_msi_msg(virq, &msg); | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static void pnv_teardown_msi_irqs(struct pci_dev *pdev) | |
108 | { | |
109 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
110 | struct pnv_phb *phb = hose->private_data; | |
111 | struct msi_desc *entry; | |
112 | ||
113 | if (WARN_ON(!phb)) | |
114 | return; | |
115 | ||
116 | list_for_each_entry(entry, &pdev->msi_list, list) { | |
117 | if (entry->irq == NO_IRQ) | |
118 | continue; | |
119 | irq_set_msi_desc(entry->irq, NULL); | |
fb1b55d6 GS |
120 | msi_bitmap_free_hwirqs(&phb->msi_bmp, |
121 | virq_to_hw(entry->irq) - phb->msi_base, 1); | |
c1a2562a BH |
122 | irq_dispose_mapping(entry->irq); |
123 | } | |
124 | } | |
125 | #endif /* CONFIG_PCI_MSI */ | |
61305a96 | 126 | |
cee72d5b BH |
127 | static void pnv_pci_dump_p7ioc_diag_data(struct pnv_phb *phb) |
128 | { | |
129 | struct OpalIoP7IOCPhbErrorData *data = &phb->diag.p7ioc; | |
130 | int i; | |
131 | ||
132 | pr_info("PHB %d diagnostic data:\n", phb->hose->global_number); | |
133 | ||
134 | pr_info(" brdgCtl = 0x%08x\n", data->brdgCtl); | |
135 | ||
136 | pr_info(" portStatusReg = 0x%08x\n", data->portStatusReg); | |
137 | pr_info(" rootCmplxStatus = 0x%08x\n", data->rootCmplxStatus); | |
138 | pr_info(" busAgentStatus = 0x%08x\n", data->busAgentStatus); | |
139 | ||
140 | pr_info(" deviceStatus = 0x%08x\n", data->deviceStatus); | |
141 | pr_info(" slotStatus = 0x%08x\n", data->slotStatus); | |
142 | pr_info(" linkStatus = 0x%08x\n", data->linkStatus); | |
143 | pr_info(" devCmdStatus = 0x%08x\n", data->devCmdStatus); | |
144 | pr_info(" devSecStatus = 0x%08x\n", data->devSecStatus); | |
145 | ||
146 | pr_info(" rootErrorStatus = 0x%08x\n", data->rootErrorStatus); | |
147 | pr_info(" uncorrErrorStatus = 0x%08x\n", data->uncorrErrorStatus); | |
148 | pr_info(" corrErrorStatus = 0x%08x\n", data->corrErrorStatus); | |
149 | pr_info(" tlpHdr1 = 0x%08x\n", data->tlpHdr1); | |
150 | pr_info(" tlpHdr2 = 0x%08x\n", data->tlpHdr2); | |
151 | pr_info(" tlpHdr3 = 0x%08x\n", data->tlpHdr3); | |
152 | pr_info(" tlpHdr4 = 0x%08x\n", data->tlpHdr4); | |
153 | pr_info(" sourceId = 0x%08x\n", data->sourceId); | |
154 | ||
155 | pr_info(" errorClass = 0x%016llx\n", data->errorClass); | |
156 | pr_info(" correlator = 0x%016llx\n", data->correlator); | |
157 | ||
158 | pr_info(" p7iocPlssr = 0x%016llx\n", data->p7iocPlssr); | |
159 | pr_info(" p7iocCsr = 0x%016llx\n", data->p7iocCsr); | |
160 | pr_info(" lemFir = 0x%016llx\n", data->lemFir); | |
161 | pr_info(" lemErrorMask = 0x%016llx\n", data->lemErrorMask); | |
162 | pr_info(" lemWOF = 0x%016llx\n", data->lemWOF); | |
163 | pr_info(" phbErrorStatus = 0x%016llx\n", data->phbErrorStatus); | |
164 | pr_info(" phbFirstErrorStatus = 0x%016llx\n", data->phbFirstErrorStatus); | |
165 | pr_info(" phbErrorLog0 = 0x%016llx\n", data->phbErrorLog0); | |
166 | pr_info(" phbErrorLog1 = 0x%016llx\n", data->phbErrorLog1); | |
167 | pr_info(" mmioErrorStatus = 0x%016llx\n", data->mmioErrorStatus); | |
168 | pr_info(" mmioFirstErrorStatus = 0x%016llx\n", data->mmioFirstErrorStatus); | |
169 | pr_info(" mmioErrorLog0 = 0x%016llx\n", data->mmioErrorLog0); | |
170 | pr_info(" mmioErrorLog1 = 0x%016llx\n", data->mmioErrorLog1); | |
171 | pr_info(" dma0ErrorStatus = 0x%016llx\n", data->dma0ErrorStatus); | |
172 | pr_info(" dma0FirstErrorStatus = 0x%016llx\n", data->dma0FirstErrorStatus); | |
173 | pr_info(" dma0ErrorLog0 = 0x%016llx\n", data->dma0ErrorLog0); | |
174 | pr_info(" dma0ErrorLog1 = 0x%016llx\n", data->dma0ErrorLog1); | |
175 | pr_info(" dma1ErrorStatus = 0x%016llx\n", data->dma1ErrorStatus); | |
176 | pr_info(" dma1FirstErrorStatus = 0x%016llx\n", data->dma1FirstErrorStatus); | |
177 | pr_info(" dma1ErrorLog0 = 0x%016llx\n", data->dma1ErrorLog0); | |
178 | pr_info(" dma1ErrorLog1 = 0x%016llx\n", data->dma1ErrorLog1); | |
179 | ||
180 | for (i = 0; i < OPAL_P7IOC_NUM_PEST_REGS; i++) { | |
181 | if ((data->pestA[i] >> 63) == 0 && | |
182 | (data->pestB[i] >> 63) == 0) | |
183 | continue; | |
184 | pr_info(" PE[%3d] PESTA = 0x%016llx\n", i, data->pestA[i]); | |
185 | pr_info(" PESTB = 0x%016llx\n", data->pestB[i]); | |
186 | } | |
187 | } | |
188 | ||
189 | static void pnv_pci_dump_phb_diag_data(struct pnv_phb *phb) | |
190 | { | |
191 | switch(phb->model) { | |
192 | case PNV_PHB_MODEL_P7IOC: | |
193 | pnv_pci_dump_p7ioc_diag_data(phb); | |
194 | break; | |
195 | default: | |
196 | pr_warning("PCI %d: Can't decode this PHB diag data\n", | |
197 | phb->hose->global_number); | |
198 | } | |
199 | } | |
200 | ||
201 | static void pnv_pci_handle_eeh_config(struct pnv_phb *phb, u32 pe_no) | |
202 | { | |
203 | unsigned long flags, rc; | |
204 | int has_diag; | |
205 | ||
206 | spin_lock_irqsave(&phb->lock, flags); | |
207 | ||
23773230 GS |
208 | rc = opal_pci_get_phb_diag_data2(phb->opal_id, phb->diag.blob, |
209 | PNV_PCI_DIAG_BUF_SIZE); | |
cee72d5b BH |
210 | has_diag = (rc == OPAL_SUCCESS); |
211 | ||
212 | rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, | |
213 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
214 | if (rc) { | |
215 | pr_warning("PCI %d: Failed to clear EEH freeze state" | |
216 | " for PE#%d, err %ld\n", | |
217 | phb->hose->global_number, pe_no, rc); | |
218 | ||
219 | /* For now, let's only display the diag buffer when we fail to clear | |
220 | * the EEH status. We'll do more sensible things later when we have | |
221 | * proper EEH support. We need to make sure we don't pollute ourselves | |
222 | * with the normal errors generated when probing empty slots | |
223 | */ | |
224 | if (has_diag) | |
225 | pnv_pci_dump_phb_diag_data(phb); | |
226 | else | |
227 | pr_warning("PCI %d: No diag data available\n", | |
228 | phb->hose->global_number); | |
229 | } | |
230 | ||
231 | spin_unlock_irqrestore(&phb->lock, flags); | |
232 | } | |
233 | ||
9bf41be6 GS |
234 | static void pnv_pci_config_check_eeh(struct pnv_phb *phb, |
235 | struct device_node *dn) | |
61305a96 BH |
236 | { |
237 | s64 rc; | |
238 | u8 fstate; | |
239 | u16 pcierr; | |
240 | u32 pe_no; | |
241 | ||
9bf41be6 GS |
242 | /* |
243 | * Get the PE#. During the PCI probe stage, we might not | |
244 | * setup that yet. So all ER errors should be mapped to | |
245 | * PE#0 | |
246 | */ | |
247 | pe_no = PCI_DN(dn)->pe_number; | |
248 | if (pe_no == IODA_INVALID_PE) | |
249 | pe_no = 0; | |
61305a96 BH |
250 | |
251 | /* Read freeze status */ | |
252 | rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, &fstate, &pcierr, | |
253 | NULL); | |
254 | if (rc) { | |
9bf41be6 GS |
255 | pr_warning("%s: Can't read EEH status (PE#%d) for " |
256 | "%s, err %lld\n", | |
257 | __func__, pe_no, dn->full_name, rc); | |
61305a96 BH |
258 | return; |
259 | } | |
9bf41be6 GS |
260 | cfg_dbg(" -> EEH check, bdfn=%04x PE#%d fstate=%x\n", |
261 | (PCI_DN(dn)->busno << 8) | (PCI_DN(dn)->devfn), | |
262 | pe_no, fstate); | |
cee72d5b BH |
263 | if (fstate != 0) |
264 | pnv_pci_handle_eeh_config(phb, pe_no); | |
61305a96 BH |
265 | } |
266 | ||
9bf41be6 GS |
267 | int pnv_pci_cfg_read(struct device_node *dn, |
268 | int where, int size, u32 *val) | |
61305a96 | 269 | { |
9bf41be6 GS |
270 | struct pci_dn *pdn = PCI_DN(dn); |
271 | struct pnv_phb *phb = pdn->phb->private_data; | |
272 | u32 bdfn = (pdn->busno << 8) | pdn->devfn; | |
be7e7446 | 273 | #ifdef CONFIG_EEH |
be7e7446 GS |
274 | struct eeh_pe *phb_pe = NULL; |
275 | #endif | |
61305a96 BH |
276 | s64 rc; |
277 | ||
61305a96 BH |
278 | switch (size) { |
279 | case 1: { | |
280 | u8 v8; | |
281 | rc = opal_pci_config_read_byte(phb->opal_id, bdfn, where, &v8); | |
282 | *val = (rc == OPAL_SUCCESS) ? v8 : 0xff; | |
283 | break; | |
284 | } | |
285 | case 2: { | |
286 | u16 v16; | |
287 | rc = opal_pci_config_read_half_word(phb->opal_id, bdfn, where, | |
288 | &v16); | |
289 | *val = (rc == OPAL_SUCCESS) ? v16 : 0xffff; | |
290 | break; | |
291 | } | |
292 | case 4: { | |
293 | u32 v32; | |
294 | rc = opal_pci_config_read_word(phb->opal_id, bdfn, where, &v32); | |
295 | *val = (rc == OPAL_SUCCESS) ? v32 : 0xffffffff; | |
296 | break; | |
297 | } | |
298 | default: | |
299 | return PCIBIOS_FUNC_NOT_SUPPORTED; | |
300 | } | |
9bf41be6 GS |
301 | cfg_dbg("%s: bus: %x devfn: %x +%x/%x -> %08x\n", |
302 | __func__, pdn->busno, pdn->devfn, where, size, *val); | |
61305a96 | 303 | |
be7e7446 GS |
304 | /* |
305 | * Check if the specified PE has been put into frozen | |
306 | * state. On the other hand, we needn't do that while | |
307 | * the PHB has been put into frozen state because of | |
308 | * PHB-fatal errors. | |
309 | */ | |
310 | #ifdef CONFIG_EEH | |
9bf41be6 | 311 | phb_pe = eeh_phb_pe_get(pdn->phb); |
be7e7446 GS |
312 | if (phb_pe && (phb_pe->state & EEH_PE_ISOLATED)) |
313 | return PCIBIOS_SUCCESSFUL; | |
314 | ||
0b9e267d | 315 | if (phb->eeh_state & PNV_EEH_STATE_ENABLED) { |
9bf41be6 GS |
316 | if (*val == EEH_IO_ERROR_VALUE(size) && |
317 | eeh_dev_check_failure(of_node_to_eeh_dev(dn))) | |
318 | return PCIBIOS_DEVICE_NOT_FOUND; | |
be7e7446 | 319 | } else { |
9bf41be6 | 320 | pnv_pci_config_check_eeh(phb, dn); |
be7e7446 GS |
321 | } |
322 | #else | |
9bf41be6 | 323 | pnv_pci_config_check_eeh(phb, dn); |
be7e7446 | 324 | #endif |
61305a96 BH |
325 | |
326 | return PCIBIOS_SUCCESSFUL; | |
327 | } | |
328 | ||
9bf41be6 GS |
329 | int pnv_pci_cfg_write(struct device_node *dn, |
330 | int where, int size, u32 val) | |
61305a96 | 331 | { |
9bf41be6 GS |
332 | struct pci_dn *pdn = PCI_DN(dn); |
333 | struct pnv_phb *phb = pdn->phb->private_data; | |
334 | u32 bdfn = (pdn->busno << 8) | pdn->devfn; | |
61305a96 | 335 | |
9bf41be6 GS |
336 | cfg_dbg("%s: bus: %x devfn: %x +%x/%x -> %08x\n", |
337 | pdn->busno, pdn->devfn, where, size, val); | |
61305a96 BH |
338 | switch (size) { |
339 | case 1: | |
340 | opal_pci_config_write_byte(phb->opal_id, bdfn, where, val); | |
341 | break; | |
342 | case 2: | |
343 | opal_pci_config_write_half_word(phb->opal_id, bdfn, where, val); | |
344 | break; | |
345 | case 4: | |
346 | opal_pci_config_write_word(phb->opal_id, bdfn, where, val); | |
347 | break; | |
348 | default: | |
349 | return PCIBIOS_FUNC_NOT_SUPPORTED; | |
350 | } | |
be7e7446 | 351 | |
61305a96 | 352 | /* Check if the PHB got frozen due to an error (no response) */ |
be7e7446 | 353 | #ifdef CONFIG_EEH |
0b9e267d | 354 | if (!(phb->eeh_state & PNV_EEH_STATE_ENABLED)) |
9bf41be6 | 355 | pnv_pci_config_check_eeh(phb, dn); |
be7e7446 | 356 | #else |
9bf41be6 | 357 | pnv_pci_config_check_eeh(phb, dn); |
be7e7446 | 358 | #endif |
61305a96 BH |
359 | |
360 | return PCIBIOS_SUCCESSFUL; | |
361 | } | |
362 | ||
9bf41be6 GS |
363 | static int pnv_pci_read_config(struct pci_bus *bus, |
364 | unsigned int devfn, | |
365 | int where, int size, u32 *val) | |
366 | { | |
367 | struct device_node *dn, *busdn = pci_bus_to_OF_node(bus); | |
368 | struct pci_dn *pdn; | |
369 | ||
370 | for (dn = busdn->child; dn; dn = dn->sibling) { | |
371 | pdn = PCI_DN(dn); | |
372 | if (pdn && pdn->devfn == devfn) | |
373 | return pnv_pci_cfg_read(dn, where, size, val); | |
374 | } | |
375 | ||
376 | *val = 0xFFFFFFFF; | |
377 | return PCIBIOS_DEVICE_NOT_FOUND; | |
378 | ||
379 | } | |
380 | ||
381 | static int pnv_pci_write_config(struct pci_bus *bus, | |
382 | unsigned int devfn, | |
383 | int where, int size, u32 val) | |
384 | { | |
385 | struct device_node *dn, *busdn = pci_bus_to_OF_node(bus); | |
386 | struct pci_dn *pdn; | |
387 | ||
388 | for (dn = busdn->child; dn; dn = dn->sibling) { | |
389 | pdn = PCI_DN(dn); | |
390 | if (pdn && pdn->devfn == devfn) | |
391 | return pnv_pci_cfg_write(dn, where, size, val); | |
392 | } | |
393 | ||
394 | return PCIBIOS_DEVICE_NOT_FOUND; | |
395 | } | |
396 | ||
61305a96 | 397 | struct pci_ops pnv_pci_ops = { |
9bf41be6 | 398 | .read = pnv_pci_read_config, |
61305a96 BH |
399 | .write = pnv_pci_write_config, |
400 | }; | |
401 | ||
402 | static int pnv_tce_build(struct iommu_table *tbl, long index, long npages, | |
403 | unsigned long uaddr, enum dma_data_direction direction, | |
404 | struct dma_attrs *attrs) | |
405 | { | |
406 | u64 proto_tce; | |
1f1616e8 | 407 | u64 *tcep, *tces; |
61305a96 BH |
408 | u64 rpn; |
409 | ||
410 | proto_tce = TCE_PCI_READ; // Read allowed | |
411 | ||
412 | if (direction != DMA_TO_DEVICE) | |
413 | proto_tce |= TCE_PCI_WRITE; | |
414 | ||
1f1616e8 BH |
415 | tces = tcep = ((u64 *)tbl->it_base) + index - tbl->it_offset; |
416 | rpn = __pa(uaddr) >> TCE_SHIFT; | |
61305a96 | 417 | |
1f1616e8 BH |
418 | while (npages--) |
419 | *(tcep++) = proto_tce | (rpn++ << TCE_RPN_SHIFT); | |
420 | ||
421 | /* Some implementations won't cache invalid TCEs and thus may not | |
422 | * need that flush. We'll probably turn it_type into a bit mask | |
423 | * of flags if that becomes the case | |
424 | */ | |
425 | if (tbl->it_type & TCE_PCI_SWINV_CREATE) | |
4cce9550 | 426 | pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1); |
61305a96 | 427 | |
61305a96 BH |
428 | return 0; |
429 | } | |
430 | ||
431 | static void pnv_tce_free(struct iommu_table *tbl, long index, long npages) | |
432 | { | |
1f1616e8 BH |
433 | u64 *tcep, *tces; |
434 | ||
435 | tces = tcep = ((u64 *)tbl->it_base) + index - tbl->it_offset; | |
61305a96 BH |
436 | |
437 | while (npages--) | |
438 | *(tcep++) = 0; | |
1f1616e8 | 439 | |
605e44d6 | 440 | if (tbl->it_type & TCE_PCI_SWINV_FREE) |
4cce9550 | 441 | pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1); |
61305a96 BH |
442 | } |
443 | ||
11f63d3f AK |
444 | static unsigned long pnv_tce_get(struct iommu_table *tbl, long index) |
445 | { | |
446 | return ((u64 *)tbl->it_base)[index - tbl->it_offset]; | |
447 | } | |
448 | ||
61305a96 BH |
449 | void pnv_pci_setup_iommu_table(struct iommu_table *tbl, |
450 | void *tce_mem, u64 tce_size, | |
451 | u64 dma_offset) | |
452 | { | |
453 | tbl->it_blocksize = 16; | |
454 | tbl->it_base = (unsigned long)tce_mem; | |
455 | tbl->it_offset = dma_offset >> IOMMU_PAGE_SHIFT; | |
456 | tbl->it_index = 0; | |
457 | tbl->it_size = tce_size >> 3; | |
458 | tbl->it_busno = 0; | |
459 | tbl->it_type = TCE_PCI; | |
460 | } | |
461 | ||
cad5cef6 | 462 | static struct iommu_table *pnv_pci_setup_bml_iommu(struct pci_controller *hose) |
61305a96 BH |
463 | { |
464 | struct iommu_table *tbl; | |
1f1616e8 | 465 | const __be64 *basep, *swinvp; |
61305a96 BH |
466 | const __be32 *sizep; |
467 | ||
468 | basep = of_get_property(hose->dn, "linux,tce-base", NULL); | |
469 | sizep = of_get_property(hose->dn, "linux,tce-size", NULL); | |
470 | if (basep == NULL || sizep == NULL) { | |
1f1616e8 BH |
471 | pr_err("PCI: %s has missing tce entries !\n", |
472 | hose->dn->full_name); | |
61305a96 BH |
473 | return NULL; |
474 | } | |
475 | tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, hose->node); | |
476 | if (WARN_ON(!tbl)) | |
477 | return NULL; | |
478 | pnv_pci_setup_iommu_table(tbl, __va(be64_to_cpup(basep)), | |
479 | be32_to_cpup(sizep), 0); | |
480 | iommu_init_table(tbl, hose->node); | |
4e13c1ac | 481 | iommu_register_group(tbl, pci_domain_nr(hose->bus), 0); |
1f1616e8 BH |
482 | |
483 | /* Deal with SW invalidated TCEs when needed (BML way) */ | |
484 | swinvp = of_get_property(hose->dn, "linux,tce-sw-invalidate-info", | |
485 | NULL); | |
486 | if (swinvp) { | |
487 | tbl->it_busno = swinvp[1]; | |
488 | tbl->it_index = (unsigned long)ioremap(swinvp[0], 8); | |
489 | tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE; | |
490 | } | |
61305a96 BH |
491 | return tbl; |
492 | } | |
493 | ||
cad5cef6 GKH |
494 | static void pnv_pci_dma_fallback_setup(struct pci_controller *hose, |
495 | struct pci_dev *pdev) | |
61305a96 BH |
496 | { |
497 | struct device_node *np = pci_bus_to_OF_node(hose->bus); | |
498 | struct pci_dn *pdn; | |
499 | ||
500 | if (np == NULL) | |
501 | return; | |
502 | pdn = PCI_DN(np); | |
503 | if (!pdn->iommu_table) | |
504 | pdn->iommu_table = pnv_pci_setup_bml_iommu(hose); | |
505 | if (!pdn->iommu_table) | |
506 | return; | |
507 | set_iommu_table_base(&pdev->dev, pdn->iommu_table); | |
508 | } | |
509 | ||
cad5cef6 | 510 | static void pnv_pci_dma_dev_setup(struct pci_dev *pdev) |
61305a96 BH |
511 | { |
512 | struct pci_controller *hose = pci_bus_to_host(pdev->bus); | |
513 | struct pnv_phb *phb = hose->private_data; | |
514 | ||
515 | /* If we have no phb structure, try to setup a fallback based on | |
516 | * the device-tree (RTAS PCI for example) | |
517 | */ | |
518 | if (phb && phb->dma_dev_setup) | |
519 | phb->dma_dev_setup(phb, pdev); | |
520 | else | |
521 | pnv_pci_dma_fallback_setup(hose, pdev); | |
522 | } | |
523 | ||
73ed148a BH |
524 | void pnv_pci_shutdown(void) |
525 | { | |
526 | struct pci_controller *hose; | |
527 | ||
528 | list_for_each_entry(hose, &hose_list, list_node) { | |
529 | struct pnv_phb *phb = hose->private_data; | |
530 | ||
531 | if (phb && phb->shutdown) | |
532 | phb->shutdown(phb); | |
533 | } | |
534 | } | |
535 | ||
aa0c033f | 536 | /* Fixup wrong class code in p7ioc and p8 root complex */ |
cad5cef6 | 537 | static void pnv_p7ioc_rc_quirk(struct pci_dev *dev) |
ca45cfe3 BH |
538 | { |
539 | dev->class = PCI_CLASS_BRIDGE_PCI << 8; | |
540 | } | |
541 | DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 0x3b9, pnv_p7ioc_rc_quirk); | |
542 | ||
82ba129b BH |
543 | static int pnv_pci_probe_mode(struct pci_bus *bus) |
544 | { | |
545 | struct pci_controller *hose = pci_bus_to_host(bus); | |
546 | const __be64 *tstamp; | |
547 | u64 now, target; | |
548 | ||
549 | ||
550 | /* We hijack this as a way to ensure we have waited long | |
551 | * enough since the reset was lifted on the PCI bus | |
552 | */ | |
553 | if (bus != hose->bus) | |
554 | return PCI_PROBE_NORMAL; | |
555 | tstamp = of_get_property(hose->dn, "reset-clear-timestamp", NULL); | |
556 | if (!tstamp || !*tstamp) | |
557 | return PCI_PROBE_NORMAL; | |
558 | ||
559 | now = mftb() / tb_ticks_per_usec; | |
560 | target = (be64_to_cpup(tstamp) / tb_ticks_per_usec) | |
561 | + PCI_RESET_DELAY_US; | |
562 | ||
563 | pr_devel("pci %04d: Reset target: 0x%llx now: 0x%llx\n", | |
564 | hose->global_number, target, now); | |
565 | ||
566 | if (now < target) | |
567 | msleep((target - now + 999) / 1000); | |
568 | ||
569 | return PCI_PROBE_NORMAL; | |
570 | } | |
571 | ||
61305a96 BH |
572 | void __init pnv_pci_init(void) |
573 | { | |
574 | struct device_node *np; | |
575 | ||
673c9756 | 576 | pci_add_flags(PCI_CAN_SKIP_ISA_ALIGN); |
61305a96 BH |
577 | |
578 | /* OPAL absent, try POPAL first then RTAS detection of PHBs */ | |
579 | if (!firmware_has_feature(FW_FEATURE_OPAL)) { | |
580 | #ifdef CONFIG_PPC_POWERNV_RTAS | |
581 | init_pci_config_tokens(); | |
582 | find_and_init_phbs(); | |
583 | #endif /* CONFIG_PPC_POWERNV_RTAS */ | |
184cd4a3 BH |
584 | } |
585 | /* OPAL is here, do our normal stuff */ | |
586 | else { | |
587 | int found_ioda = 0; | |
588 | ||
589 | /* Look for IODA IO-Hubs. We don't support mixing IODA | |
590 | * and p5ioc2 due to the need to change some global | |
591 | * probing flags | |
592 | */ | |
593 | for_each_compatible_node(np, NULL, "ibm,ioda-hub") { | |
594 | pnv_pci_init_ioda_hub(np); | |
595 | found_ioda = 1; | |
596 | } | |
61305a96 BH |
597 | |
598 | /* Look for p5ioc2 IO-Hubs */ | |
184cd4a3 BH |
599 | if (!found_ioda) |
600 | for_each_compatible_node(np, NULL, "ibm,p5ioc2") | |
601 | pnv_pci_init_p5ioc2_hub(np); | |
aa0c033f GS |
602 | |
603 | /* Look for ioda2 built-in PHB3's */ | |
604 | for_each_compatible_node(np, NULL, "ibm,ioda2-phb") | |
605 | pnv_pci_init_ioda2_phb(np); | |
61305a96 BH |
606 | } |
607 | ||
608 | /* Setup the linkage between OF nodes and PHBs */ | |
609 | pci_devs_phb_init(); | |
610 | ||
611 | /* Configure IOMMU DMA hooks */ | |
612 | ppc_md.pci_dma_dev_setup = pnv_pci_dma_dev_setup; | |
613 | ppc_md.tce_build = pnv_tce_build; | |
614 | ppc_md.tce_free = pnv_tce_free; | |
11f63d3f | 615 | ppc_md.tce_get = pnv_tce_get; |
82ba129b | 616 | ppc_md.pci_probe_mode = pnv_pci_probe_mode; |
61305a96 BH |
617 | set_pci_dma_ops(&dma_iommu_ops); |
618 | ||
c1a2562a BH |
619 | /* Configure MSIs */ |
620 | #ifdef CONFIG_PCI_MSI | |
621 | ppc_md.msi_check_device = pnv_msi_check_device; | |
622 | ppc_md.setup_msi_irqs = pnv_setup_msi_irqs; | |
623 | ppc_md.teardown_msi_irqs = pnv_teardown_msi_irqs; | |
624 | #endif | |
61305a96 | 625 | } |