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Jan Glaubercd248342012-11-29 12:50:30 +01001/*
2 * Copyright IBM Corp. 2012
3 *
4 * Author(s):
5 * Jan Glauber <jang@linux.vnet.ibm.com>
6 *
7 * The System z PCI code is a rewrite from a prototype by
8 * the following people (Kudoz!):
Jan Glauberbedef752012-12-06 14:06:28 +01009 * Alexander Schmidt
10 * Christoph Raisch
11 * Hannes Hering
12 * Hoang-Nam Nguyen
13 * Jan-Bernd Themann
14 * Stefan Roscher
15 * Thomas Klein
Jan Glaubercd248342012-11-29 12:50:30 +010016 */
17
Gerald Schaefer896cb7e2014-07-16 17:21:01 +020018#define KMSG_COMPONENT "zpci"
19#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
Jan Glaubercd248342012-11-29 12:50:30 +010020
21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/err.h>
24#include <linux/export.h>
25#include <linux/delay.h>
Jan Glauber9a4da8a2012-11-29 13:05:05 +010026#include <linux/irq.h>
27#include <linux/kernel_stat.h>
Jan Glaubercd248342012-11-29 12:50:30 +010028#include <linux/seq_file.h>
29#include <linux/pci.h>
30#include <linux/msi.h>
31
Jan Glauber9a4da8a2012-11-29 13:05:05 +010032#include <asm/isc.h>
33#include <asm/airq.h>
Jan Glaubercd248342012-11-29 12:50:30 +010034#include <asm/facility.h>
35#include <asm/pci_insn.h>
Jan Glaubera755a452012-11-29 12:55:21 +010036#include <asm/pci_clp.h>
Jan Glauber828b35f2012-11-29 14:33:30 +010037#include <asm/pci_dma.h>
Jan Glaubercd248342012-11-29 12:50:30 +010038
39#define DEBUG /* enable pr_debug */
40
Jan Glauber9a4da8a2012-11-29 13:05:05 +010041#define SIC_IRQ_MODE_ALL 0
42#define SIC_IRQ_MODE_SINGLE 1
43
Jan Glaubercd248342012-11-29 12:50:30 +010044#define ZPCI_NR_DMA_SPACES 1
45#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
46
47/* list of all detected zpci devices */
Sebastian Ott67f43f32013-08-29 19:33:16 +020048static LIST_HEAD(zpci_list);
Sebastian Ott57b59182013-08-29 19:40:01 +020049static DEFINE_SPINLOCK(zpci_list_lock);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +020050
Martin Schwidefsky1f44a222013-06-27 09:01:09 +020051static struct irq_chip zpci_irq_chip = {
52 .name = "zPCI",
Yijing Wang8fb878c2014-07-08 10:08:05 +080053 .irq_unmask = unmask_msi_irq,
54 .irq_mask = mask_msi_irq,
Martin Schwidefsky1f44a222013-06-27 09:01:09 +020055};
56
Jan Glaubercd248342012-11-29 12:50:30 +010057static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
58static DEFINE_SPINLOCK(zpci_domain_lock);
59
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +020060static struct airq_iv *zpci_aisb_iv;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +020061static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
Jan Glauber9a4da8a2012-11-29 13:05:05 +010062
Martin Schwidefskyf4eae942013-06-24 10:30:41 +020063/* Adapter interrupt definitions */
64static void zpci_irq_handler(struct airq_struct *airq);
65
66static struct airq_struct zpci_airq = {
67 .handler = zpci_irq_handler,
68 .isc = PCI_ISC,
69};
Jan Glauber9a4da8a2012-11-29 13:05:05 +010070
Jan Glaubercd248342012-11-29 12:50:30 +010071/* I/O Map */
72static DEFINE_SPINLOCK(zpci_iomap_lock);
73static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
74struct zpci_iomap_entry *zpci_iomap_start;
75EXPORT_SYMBOL_GPL(zpci_iomap_start);
76
Jan Glauberd0b08852012-12-11 14:53:35 +010077static struct kmem_cache *zdev_fmb_cache;
78
Jan Glaubercd248342012-11-29 12:50:30 +010079struct zpci_dev *get_zdev(struct pci_dev *pdev)
80{
81 return (struct zpci_dev *) pdev->sysdata;
82}
83
84struct zpci_dev *get_zdev_by_fid(u32 fid)
85{
86 struct zpci_dev *tmp, *zdev = NULL;
87
Sebastian Ott57b59182013-08-29 19:40:01 +020088 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010089 list_for_each_entry(tmp, &zpci_list, entry) {
90 if (tmp->fid == fid) {
91 zdev = tmp;
92 break;
93 }
94 }
Sebastian Ott57b59182013-08-29 19:40:01 +020095 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010096 return zdev;
97}
98
Jan Glaubercd248342012-11-29 12:50:30 +010099static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
100{
101 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
102}
103
104int pci_domain_nr(struct pci_bus *bus)
105{
106 return ((struct zpci_dev *) bus->sysdata)->domain;
107}
108EXPORT_SYMBOL_GPL(pci_domain_nr);
109
110int pci_proc_domain(struct pci_bus *bus)
111{
112 return pci_domain_nr(bus);
113}
114EXPORT_SYMBOL_GPL(pci_proc_domain);
115
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100116/* Modify PCI: Register adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200117static int zpci_set_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100118{
119 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200120 struct zpci_fib fib = {0};
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100121
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200122 fib.isc = PCI_ISC;
123 fib.sum = 1; /* enable summary notifications */
124 fib.noi = airq_iv_end(zdev->aibv);
125 fib.aibv = (unsigned long) zdev->aibv->vector;
126 fib.aibvo = 0; /* each zdev has its own interrupt vector */
127 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
128 fib.aisbo = zdev->aisb & 63;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100129
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200130 return zpci_mod_fc(req, &fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100131}
132
133struct mod_pci_args {
134 u64 base;
135 u64 limit;
136 u64 iota;
Jan Glauberd0b08852012-12-11 14:53:35 +0100137 u64 fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100138};
139
140static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
141{
142 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200143 struct zpci_fib fib = {0};
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100144
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200145 fib.pba = args->base;
146 fib.pal = args->limit;
147 fib.iota = args->iota;
148 fib.fmb_addr = args->fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100149
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200150 return zpci_mod_fc(req, &fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100151}
152
Jan Glauber828b35f2012-11-29 14:33:30 +0100153/* Modify PCI: Register I/O address translation parameters */
154int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
155 u64 base, u64 limit, u64 iota)
156{
Jan Glauberd0b08852012-12-11 14:53:35 +0100157 struct mod_pci_args args = { base, limit, iota, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100158
159 WARN_ON_ONCE(iota & 0x3fff);
160 args.iota |= ZPCI_IOTA_RTTO_FLAG;
161 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
162}
163
164/* Modify PCI: Unregister I/O address translation parameters */
165int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
166{
Jan Glauberd0b08852012-12-11 14:53:35 +0100167 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100168
169 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
170}
171
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100172/* Modify PCI: Unregister adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200173static int zpci_clear_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100174{
Jan Glauberd0b08852012-12-11 14:53:35 +0100175 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100176
177 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
178}
179
Jan Glauberd0b08852012-12-11 14:53:35 +0100180/* Modify PCI: Set PCI function measurement parameters */
181int zpci_fmb_enable_device(struct zpci_dev *zdev)
182{
183 struct mod_pci_args args = { 0, 0, 0, 0 };
184
185 if (zdev->fmb)
186 return -EINVAL;
187
Wei Yongjun08b42122013-02-25 22:09:25 +0800188 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
Jan Glauberd0b08852012-12-11 14:53:35 +0100189 if (!zdev->fmb)
190 return -ENOMEM;
Jan Glauberd0b08852012-12-11 14:53:35 +0100191 WARN_ON((u64) zdev->fmb & 0xf);
192
193 args.fmb_addr = virt_to_phys(zdev->fmb);
194 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
195}
196
197/* Modify PCI: Disable PCI function measurement */
198int zpci_fmb_disable_device(struct zpci_dev *zdev)
199{
200 struct mod_pci_args args = { 0, 0, 0, 0 };
201 int rc;
202
203 if (!zdev->fmb)
204 return -EINVAL;
205
206 /* Function measurement is disabled if fmb address is zero */
207 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
208
209 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
210 zdev->fmb = NULL;
211 return rc;
212}
213
Jan Glaubercd248342012-11-29 12:50:30 +0100214#define ZPCI_PCIAS_CFGSPC 15
215
216static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
217{
218 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
219 u64 data;
220 int rc;
221
Martin Schwidefsky93893392013-06-25 14:52:23 +0200222 rc = zpci_load(&data, req, offset);
Sebastian Ottb170bad2013-04-16 14:17:15 +0200223 if (!rc) {
224 data = data << ((8 - len) * 8);
225 data = le64_to_cpu(data);
Jan Glaubercd248342012-11-29 12:50:30 +0100226 *val = (u32) data;
Sebastian Ottb170bad2013-04-16 14:17:15 +0200227 } else
Jan Glaubercd248342012-11-29 12:50:30 +0100228 *val = 0xffffffff;
229 return rc;
230}
231
232static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
233{
234 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
235 u64 data = val;
236 int rc;
237
238 data = cpu_to_le64(data);
239 data = data >> ((8 - len) * 8);
Martin Schwidefsky93893392013-06-25 14:52:23 +0200240 rc = zpci_store(data, req, offset);
Jan Glaubercd248342012-11-29 12:50:30 +0100241 return rc;
242}
243
Greg Kroah-Hartmanb881bc42012-12-21 14:06:37 -0800244void pcibios_fixup_bus(struct pci_bus *bus)
Jan Glaubercd248342012-11-29 12:50:30 +0100245{
246}
247
248resource_size_t pcibios_align_resource(void *data, const struct resource *res,
249 resource_size_t size,
250 resource_size_t align)
251{
252 return 0;
253}
254
Jan Glauber87bc3592012-12-06 14:30:28 +0100255/* combine single writes by using store-block insn */
256void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
257{
258 zpci_memcpy_toio(to, from, count);
259}
260
Jan Glaubercd248342012-11-29 12:50:30 +0100261/* Create a virtual mapping cookie for a PCI BAR */
262void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max)
263{
264 struct zpci_dev *zdev = get_zdev(pdev);
265 u64 addr;
266 int idx;
267
268 if ((bar & 7) != bar)
269 return NULL;
270
271 idx = zdev->bars[bar].map_idx;
272 spin_lock(&zpci_iomap_lock);
273 zpci_iomap_start[idx].fh = zdev->fh;
274 zpci_iomap_start[idx].bar = bar;
275 spin_unlock(&zpci_iomap_lock);
276
277 addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
278 return (void __iomem *) addr;
279}
280EXPORT_SYMBOL_GPL(pci_iomap);
281
282void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
283{
284 unsigned int idx;
285
286 idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
287 spin_lock(&zpci_iomap_lock);
288 zpci_iomap_start[idx].fh = 0;
289 zpci_iomap_start[idx].bar = 0;
290 spin_unlock(&zpci_iomap_lock);
291}
292EXPORT_SYMBOL_GPL(pci_iounmap);
293
294static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
295 int size, u32 *val)
296{
297 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200298 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100299
300 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200301 ret = -ENODEV;
302 else
303 ret = zpci_cfg_load(zdev, where, val, size);
304
305 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100306}
307
308static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
309 int size, u32 val)
310{
311 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200312 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100313
314 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200315 ret = -ENODEV;
316 else
317 ret = zpci_cfg_store(zdev, where, val, size);
318
319 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100320}
321
322static struct pci_ops pci_root_ops = {
323 .read = pci_read,
324 .write = pci_write,
325};
326
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200327static void zpci_irq_handler(struct airq_struct *airq)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100328{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200329 unsigned long si, ai;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200330 struct airq_iv *aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200331 int irqs_on = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100332
Heiko Carstens420f42e2013-01-02 15:18:18 +0100333 inc_irq_stat(IRQIO_PCI);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200334 for (si = 0;;) {
335 /* Scan adapter summary indicator bit vector */
336 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
337 if (si == -1UL) {
338 if (irqs_on++)
339 /* End of second scan with interrupts on. */
340 break;
341 /* First scan complete, reenable interrupts. */
342 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
343 si = 0;
344 continue;
345 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100346
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200347 /* Scan the adapter interrupt vector for this device. */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200348 aibv = zpci_aibv[si];
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200349 for (ai = 0;;) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200350 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200351 if (ai == -1UL)
352 break;
Heiko Carstens420f42e2013-01-02 15:18:18 +0100353 inc_irq_stat(IRQIO_MSI);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200354 airq_iv_lock(aibv, ai);
355 generic_handle_irq(airq_iv_get_data(aibv, ai));
356 airq_iv_unlock(aibv, ai);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100357 }
358 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100359}
360
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200361int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100362{
363 struct zpci_dev *zdev = get_zdev(pdev);
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000364 unsigned int hwirq, msi_vecs;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200365 unsigned long aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100366 struct msi_desc *msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200367 struct msi_msg msg;
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000368 int rc, irq;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100369
Alexander Gordeeva384c892013-12-16 09:34:54 +0100370 if (type == PCI_CAP_ID_MSI && nvec > 1)
371 return 1;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200372 msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200373 msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100374
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200375 /* Allocate adapter summary indicator bit */
376 rc = -EIO;
377 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
378 if (aisb == -1UL)
379 goto out;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100380 zdev->aisb = aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100381
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200382 /* Create adapter interrupt vector */
383 rc = -ENOMEM;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200384 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200385 if (!zdev->aibv)
386 goto out_si;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100387
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200388 /* Wire up shortcut pointer */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200389 zpci_aibv[aisb] = zdev->aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200390
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200391 /* Request MSI interrupts */
392 hwirq = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100393 list_for_each_entry(msi, &pdev->msi_list, list) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200394 rc = -EIO;
395 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000396 if (irq < 0)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200397 goto out_msi;
398 rc = irq_set_msi_desc(irq, msi);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100399 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200400 goto out_msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200401 irq_set_chip_and_handler(irq, &zpci_irq_chip,
402 handle_simple_irq);
403 msg.data = hwirq;
404 msg.address_lo = zdev->msi_addr & 0xffffffff;
405 msg.address_hi = zdev->msi_addr >> 32;
Jiang Liu83a18912014-11-09 23:10:34 +0800406 pci_write_msi_msg(irq, &msg);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200407 airq_iv_set_data(zdev->aibv, hwirq, irq);
408 hwirq++;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100409 }
410
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200411 /* Enable adapter interrupts */
412 rc = zpci_set_airq(zdev);
413 if (rc)
414 goto out_msi;
415
416 return (msi_vecs == nvec) ? 0 : msi_vecs;
417
418out_msi:
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200419 list_for_each_entry(msi, &pdev->msi_list, list) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200420 if (hwirq-- == 0)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200421 break;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200422 irq_set_msi_desc(msi->irq, NULL);
423 irq_free_desc(msi->irq);
424 msi->msg.address_lo = 0;
425 msi->msg.address_hi = 0;
426 msi->msg.data = 0;
427 msi->irq = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100428 }
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200429 zpci_aibv[aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200430 airq_iv_release(zdev->aibv);
431out_si:
432 airq_iv_free_bit(zpci_aisb_iv, aisb);
433out:
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200434 return rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100435}
436
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200437void arch_teardown_msi_irqs(struct pci_dev *pdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100438{
439 struct zpci_dev *zdev = get_zdev(pdev);
440 struct msi_desc *msi;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200441 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100442
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200443 /* Disable adapter interrupts */
444 rc = zpci_clear_airq(zdev);
Sebastian Ott1f1dcbd2013-10-22 15:17:19 +0200445 if (rc)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100446 return;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100447
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200448 /* Release MSI interrupts */
449 list_for_each_entry(msi, &pdev->msi_list, list) {
Yijing Wang8fb878c2014-07-08 10:08:05 +0800450 if (msi->msi_attrib.is_msix)
Yijing Wangf8338692014-10-27 10:44:38 +0800451 __msix_mask_irq(msi, 1);
Yijing Wang8fb878c2014-07-08 10:08:05 +0800452 else
Yijing Wangf8338692014-10-27 10:44:38 +0800453 __msi_mask_irq(msi, 1, 1);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200454 irq_set_msi_desc(msi->irq, NULL);
455 irq_free_desc(msi->irq);
456 msi->msg.address_lo = 0;
457 msi->msg.address_hi = 0;
458 msi->msg.data = 0;
459 msi->irq = 0;
460 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100461
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200462 zpci_aibv[zdev->aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200463 airq_iv_release(zdev->aibv);
464 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100465}
466
Jan Glaubercd248342012-11-29 12:50:30 +0100467static void zpci_map_resources(struct zpci_dev *zdev)
468{
469 struct pci_dev *pdev = zdev->pdev;
470 resource_size_t len;
471 int i;
472
473 for (i = 0; i < PCI_BAR_COUNT; i++) {
474 len = pci_resource_len(pdev, i);
475 if (!len)
476 continue;
477 pdev->resource[i].start = (resource_size_t) pci_iomap(pdev, i, 0);
478 pdev->resource[i].end = pdev->resource[i].start + len - 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100479 }
Sebastian Ott944239c2013-06-05 16:06:16 +0200480}
481
482static void zpci_unmap_resources(struct zpci_dev *zdev)
483{
484 struct pci_dev *pdev = zdev->pdev;
485 resource_size_t len;
486 int i;
487
488 for (i = 0; i < PCI_BAR_COUNT; i++) {
489 len = pci_resource_len(pdev, i);
490 if (!len)
491 continue;
492 pci_iounmap(pdev, (void *) pdev->resource[i].start);
493 }
494}
Jan Glaubercd248342012-11-29 12:50:30 +0100495
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100496static int __init zpci_irq_init(void)
497{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200498 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100499
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200500 rc = register_adapter_interrupt(&zpci_airq);
501 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200502 goto out;
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200503 /* Set summary to 1 to be called every time for the ISC. */
504 *zpci_airq.lsi_ptr = 1;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100505
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200506 rc = -ENOMEM;
507 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
508 if (!zpci_aisb_iv)
509 goto out_airq;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100510
Martin Schwidefsky93893392013-06-25 14:52:23 +0200511 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100512 return 0;
513
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200514out_airq:
515 unregister_adapter_interrupt(&zpci_airq);
516out:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100517 return rc;
518}
519
520static void zpci_irq_exit(void)
521{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200522 airq_iv_release(zpci_aisb_iv);
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200523 unregister_adapter_interrupt(&zpci_airq);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100524}
525
Jan Glaubercd248342012-11-29 12:50:30 +0100526static int zpci_alloc_iomap(struct zpci_dev *zdev)
527{
528 int entry;
529
530 spin_lock(&zpci_iomap_lock);
531 entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
532 if (entry == ZPCI_IOMAP_MAX_ENTRIES) {
533 spin_unlock(&zpci_iomap_lock);
534 return -ENOSPC;
535 }
536 set_bit(entry, zpci_iomap);
537 spin_unlock(&zpci_iomap_lock);
538 return entry;
539}
540
541static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
542{
543 spin_lock(&zpci_iomap_lock);
544 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
545 clear_bit(entry, zpci_iomap);
546 spin_unlock(&zpci_iomap_lock);
547}
548
Sebastian Ott7a572a3a2013-11-12 19:33:06 +0100549static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
550 unsigned long size, unsigned long flags)
551{
552 struct resource *r;
553
554 r = kzalloc(sizeof(*r), GFP_KERNEL);
555 if (!r)
556 return NULL;
557
558 r->start = start;
559 r->end = r->start + size - 1;
560 r->flags = flags;
561 r->name = zdev->res_name;
562
563 if (request_resource(&iomem_resource, r)) {
564 kfree(r);
565 return NULL;
566 }
567 return r;
568}
569
570static int zpci_setup_bus_resources(struct zpci_dev *zdev,
571 struct list_head *resources)
572{
573 unsigned long addr, size, flags;
574 struct resource *res;
575 int i, entry;
576
577 snprintf(zdev->res_name, sizeof(zdev->res_name),
578 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
579
580 for (i = 0; i < PCI_BAR_COUNT; i++) {
581 if (!zdev->bars[i].size)
582 continue;
583 entry = zpci_alloc_iomap(zdev);
584 if (entry < 0)
585 return entry;
586 zdev->bars[i].map_idx = entry;
587
588 /* only MMIO is supported */
589 flags = IORESOURCE_MEM;
590 if (zdev->bars[i].val & 8)
591 flags |= IORESOURCE_PREFETCH;
592 if (zdev->bars[i].val & 4)
593 flags |= IORESOURCE_MEM_64;
594
595 addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
596
597 size = 1UL << zdev->bars[i].size;
598
599 res = __alloc_res(zdev, addr, size, flags);
600 if (!res) {
601 zpci_free_iomap(zdev, entry);
602 return -ENOMEM;
603 }
604 zdev->bars[i].res = res;
605 pci_add_resource(resources, res);
606 }
607
608 return 0;
609}
610
611static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
612{
613 int i;
614
615 for (i = 0; i < PCI_BAR_COUNT; i++) {
616 if (!zdev->bars[i].size)
617 continue;
618
619 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
620 release_resource(zdev->bars[i].res);
621 kfree(zdev->bars[i].res);
622 }
623}
624
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200625int pcibios_add_device(struct pci_dev *pdev)
626{
627 struct zpci_dev *zdev = get_zdev(pdev);
Sebastian Ottcb809182013-08-29 19:34:37 +0200628 struct resource *res;
629 int i;
630
631 zdev->pdev = pdev;
Sebastian Ottef4858c2014-04-30 14:50:09 -0600632 pdev->dev.groups = zpci_attr_groups;
Sebastian Ottcb809182013-08-29 19:34:37 +0200633 zpci_map_resources(zdev);
634
635 for (i = 0; i < PCI_BAR_COUNT; i++) {
636 res = &pdev->resource[i];
637 if (res->parent || !res->flags)
638 continue;
639 pci_claim_resource(pdev, i);
640 }
641
642 return 0;
643}
644
645int pcibios_enable_device(struct pci_dev *pdev, int mask)
646{
647 struct zpci_dev *zdev = get_zdev(pdev);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200648
Sebastian Ott1c213512013-04-25 14:49:48 +0200649 zdev->pdev = pdev;
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200650 zpci_debug_init_device(zdev);
651 zpci_fmb_enable_device(zdev);
652 zpci_map_resources(zdev);
653
Bjorn Helgaasd7533232014-02-26 15:30:24 -0700654 return pci_enable_resources(pdev, mask);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200655}
656
Sebastian Ottcb809182013-08-29 19:34:37 +0200657void pcibios_disable_device(struct pci_dev *pdev)
Sebastian Ott944239c2013-06-05 16:06:16 +0200658{
659 struct zpci_dev *zdev = get_zdev(pdev);
660
661 zpci_unmap_resources(zdev);
662 zpci_fmb_disable_device(zdev);
663 zpci_debug_exit_device(zdev);
664 zdev->pdev = NULL;
665}
666
Sebastian Ott69db3b52013-09-25 12:27:43 +0200667#ifdef CONFIG_HIBERNATE_CALLBACKS
668static int zpci_restore(struct device *dev)
669{
670 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
671 int ret = 0;
672
673 if (zdev->state != ZPCI_FN_STATE_ONLINE)
674 goto out;
675
676 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
677 if (ret)
678 goto out;
679
680 zpci_map_resources(zdev);
681 zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET,
682 zdev->start_dma + zdev->iommu_size - 1,
683 (u64) zdev->dma_table);
684
685out:
686 return ret;
687}
688
689static int zpci_freeze(struct device *dev)
690{
691 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
692
693 if (zdev->state != ZPCI_FN_STATE_ONLINE)
694 return 0;
695
696 zpci_unregister_ioat(zdev, 0);
697 return clp_disable_fh(zdev);
698}
699
700struct dev_pm_ops pcibios_pm_ops = {
701 .thaw_noirq = zpci_restore,
702 .freeze_noirq = zpci_freeze,
703 .restore_noirq = zpci_restore,
704 .poweroff_noirq = zpci_freeze,
705};
706#endif /* CONFIG_HIBERNATE_CALLBACKS */
707
Jan Glaubercd248342012-11-29 12:50:30 +0100708static int zpci_alloc_domain(struct zpci_dev *zdev)
709{
710 spin_lock(&zpci_domain_lock);
711 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
712 if (zdev->domain == ZPCI_NR_DEVICES) {
713 spin_unlock(&zpci_domain_lock);
714 return -ENOSPC;
715 }
716 set_bit(zdev->domain, zpci_domain);
717 spin_unlock(&zpci_domain_lock);
718 return 0;
719}
720
721static void zpci_free_domain(struct zpci_dev *zdev)
722{
723 spin_lock(&zpci_domain_lock);
724 clear_bit(zdev->domain, zpci_domain);
725 spin_unlock(&zpci_domain_lock);
726}
727
Sebastian Ott7d594322013-11-12 19:35:01 +0100728void pcibios_remove_bus(struct pci_bus *bus)
729{
730 struct zpci_dev *zdev = get_zdev_by_bus(bus);
731
732 zpci_exit_slot(zdev);
733 zpci_cleanup_bus_resources(zdev);
734 zpci_free_domain(zdev);
735
736 spin_lock(&zpci_list_lock);
737 list_del(&zdev->entry);
738 spin_unlock(&zpci_list_lock);
739
740 kfree(zdev);
741}
742
743static int zpci_scan_bus(struct zpci_dev *zdev)
744{
745 LIST_HEAD(resources);
746 int ret;
747
748 ret = zpci_setup_bus_resources(zdev, &resources);
749 if (ret)
750 return ret;
751
752 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
753 zdev, &resources);
754 if (!zdev->bus) {
755 zpci_cleanup_bus_resources(zdev);
756 return -EIO;
757 }
758
759 zdev->bus->max_bus_speed = zdev->max_bus_speed;
760 return 0;
761}
762
Jan Glaubera755a452012-11-29 12:55:21 +0100763int zpci_enable_device(struct zpci_dev *zdev)
764{
765 int rc;
766
767 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
768 if (rc)
769 goto out;
Jan Glauber828b35f2012-11-29 14:33:30 +0100770
771 rc = zpci_dma_init_device(zdev);
772 if (rc)
773 goto out_dma;
Sebastian Ott0ff70ec2013-08-29 19:35:19 +0200774
775 zdev->state = ZPCI_FN_STATE_ONLINE;
Jan Glaubera755a452012-11-29 12:55:21 +0100776 return 0;
Jan Glauber828b35f2012-11-29 14:33:30 +0100777
778out_dma:
779 clp_disable_fh(zdev);
Jan Glaubera755a452012-11-29 12:55:21 +0100780out:
781 return rc;
782}
783EXPORT_SYMBOL_GPL(zpci_enable_device);
784
Sebastian Ottcb65a662013-04-16 14:12:17 +0200785int zpci_disable_device(struct zpci_dev *zdev)
786{
787 zpci_dma_exit_device(zdev);
788 return clp_disable_fh(zdev);
789}
790EXPORT_SYMBOL_GPL(zpci_disable_device);
791
Jan Glaubercd248342012-11-29 12:50:30 +0100792int zpci_create_device(struct zpci_dev *zdev)
793{
794 int rc;
795
796 rc = zpci_alloc_domain(zdev);
797 if (rc)
798 goto out;
799
Sebastian Ott1c213512013-04-25 14:49:48 +0200800 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
801 rc = zpci_enable_device(zdev);
802 if (rc)
803 goto out_free;
Sebastian Ott1c213512013-04-25 14:49:48 +0200804 }
805 rc = zpci_scan_bus(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100806 if (rc)
Sebastian Ott1c213512013-04-25 14:49:48 +0200807 goto out_disable;
Jan Glaubercd248342012-11-29 12:50:30 +0100808
Sebastian Ott57b59182013-08-29 19:40:01 +0200809 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100810 list_add_tail(&zdev->entry, &zpci_list);
Sebastian Ott57b59182013-08-29 19:40:01 +0200811 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100812
Sebastian Ott67f43f32013-08-29 19:33:16 +0200813 zpci_init_slot(zdev);
814
Jan Glaubercd248342012-11-29 12:50:30 +0100815 return 0;
816
Sebastian Ott1c213512013-04-25 14:49:48 +0200817out_disable:
818 if (zdev->state == ZPCI_FN_STATE_ONLINE)
819 zpci_disable_device(zdev);
820out_free:
Jan Glaubercd248342012-11-29 12:50:30 +0100821 zpci_free_domain(zdev);
822out:
823 return rc;
824}
825
826void zpci_stop_device(struct zpci_dev *zdev)
827{
Jan Glauber828b35f2012-11-29 14:33:30 +0100828 zpci_dma_exit_device(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100829 /*
830 * Note: SCLP disables fh via set-pci-fn so don't
831 * do that here.
832 */
833}
834EXPORT_SYMBOL_GPL(zpci_stop_device);
835
Jan Glaubercd248342012-11-29 12:50:30 +0100836static inline int barsize(u8 size)
837{
838 return (size) ? (1 << size) >> 10 : 0;
839}
840
841static int zpci_mem_init(void)
842{
Jan Glauberd0b08852012-12-11 14:53:35 +0100843 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
844 16, 0, NULL);
845 if (!zdev_fmb_cache)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200846 goto error_zdev;
Jan Glauberd0b08852012-12-11 14:53:35 +0100847
Jan Glaubercd248342012-11-29 12:50:30 +0100848 /* TODO: use realloc */
849 zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
850 GFP_KERNEL);
851 if (!zpci_iomap_start)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100852 goto error_iomap;
Jan Glaubercd248342012-11-29 12:50:30 +0100853 return 0;
854
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100855error_iomap:
Jan Glauberd0b08852012-12-11 14:53:35 +0100856 kmem_cache_destroy(zdev_fmb_cache);
Jan Glaubercd248342012-11-29 12:50:30 +0100857error_zdev:
858 return -ENOMEM;
859}
860
861static void zpci_mem_exit(void)
862{
863 kfree(zpci_iomap_start);
Jan Glauberd0b08852012-12-11 14:53:35 +0100864 kmem_cache_destroy(zdev_fmb_cache);
Jan Glaubercd248342012-11-29 12:50:30 +0100865}
866
Sebastian Ott257608f2013-12-12 17:55:22 +0100867static unsigned int s390_pci_probe = 1;
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100868static unsigned int s390_pci_initialized;
Jan Glaubercd248342012-11-29 12:50:30 +0100869
870char * __init pcibios_setup(char *str)
871{
Sebastian Ott257608f2013-12-12 17:55:22 +0100872 if (!strcmp(str, "off")) {
873 s390_pci_probe = 0;
Jan Glaubercd248342012-11-29 12:50:30 +0100874 return NULL;
875 }
876 return str;
877}
878
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100879bool zpci_is_enabled(void)
880{
881 return s390_pci_initialized;
882}
883
Jan Glaubercd248342012-11-29 12:50:30 +0100884static int __init pci_base_init(void)
885{
886 int rc;
887
Heiko Carstens1e5635d2013-01-30 15:52:16 +0100888 if (!s390_pci_probe)
Jan Glaubercd248342012-11-29 12:50:30 +0100889 return 0;
890
891 if (!test_facility(2) || !test_facility(69)
892 || !test_facility(71) || !test_facility(72))
893 return 0;
894
Jan Glauberd0b08852012-12-11 14:53:35 +0100895 rc = zpci_debug_init();
896 if (rc)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200897 goto out;
Jan Glauberd0b08852012-12-11 14:53:35 +0100898
Jan Glaubercd248342012-11-29 12:50:30 +0100899 rc = zpci_mem_init();
900 if (rc)
901 goto out_mem;
902
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100903 rc = zpci_irq_init();
904 if (rc)
905 goto out_irq;
906
Jan Glauber828b35f2012-11-29 14:33:30 +0100907 rc = zpci_dma_init();
908 if (rc)
909 goto out_dma;
910
Sebastian Ott1d578962013-08-29 19:37:28 +0200911 rc = clp_scan_pci_devices();
Jan Glaubera755a452012-11-29 12:55:21 +0100912 if (rc)
913 goto out_find;
914
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100915 s390_pci_initialized = 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100916 return 0;
917
Jan Glaubera755a452012-11-29 12:55:21 +0100918out_find:
Jan Glauber828b35f2012-11-29 14:33:30 +0100919 zpci_dma_exit();
920out_dma:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100921 zpci_irq_exit();
922out_irq:
Jan Glaubercd248342012-11-29 12:50:30 +0100923 zpci_mem_exit();
924out_mem:
Jan Glauberd0b08852012-12-11 14:53:35 +0100925 zpci_debug_exit();
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200926out:
Jan Glaubercd248342012-11-29 12:50:30 +0100927 return rc;
928}
Sebastian Ott67f43f32013-08-29 19:33:16 +0200929subsys_initcall_sync(pci_base_init);
Sebastian Ott57b59182013-08-29 19:40:01 +0200930
931void zpci_rescan(void)
932{
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100933 if (zpci_is_enabled())
934 clp_rescan_pci_devices_simple();
Sebastian Ott57b59182013-08-29 19:40:01 +0200935}