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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",
Thomas Gleixner280510f2014-11-23 12:23:20 +010053 .irq_unmask = pci_msi_unmask_irq,
54 .irq_mask = pci_msi_mask_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
Sebastian Ottc506fff32016-01-22 14:01:44 +010071#define ZPCI_IOMAP_ENTRIES \
72 min(((unsigned long) CONFIG_PCI_NR_FUNCTIONS * PCI_BAR_COUNT), \
73 ZPCI_IOMAP_MAX_ENTRIES)
74
Jan Glaubercd248342012-11-29 12:50:30 +010075static DEFINE_SPINLOCK(zpci_iomap_lock);
Sebastian Ottc506fff32016-01-22 14:01:44 +010076static unsigned long *zpci_iomap_bitmap;
Jan Glaubercd248342012-11-29 12:50:30 +010077struct zpci_iomap_entry *zpci_iomap_start;
78EXPORT_SYMBOL_GPL(zpci_iomap_start);
79
Jan Glauberd0b08852012-12-11 14:53:35 +010080static struct kmem_cache *zdev_fmb_cache;
81
Jan Glaubercd248342012-11-29 12:50:30 +010082struct zpci_dev *get_zdev_by_fid(u32 fid)
83{
84 struct zpci_dev *tmp, *zdev = NULL;
85
Sebastian Ott57b59182013-08-29 19:40:01 +020086 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010087 list_for_each_entry(tmp, &zpci_list, entry) {
88 if (tmp->fid == fid) {
89 zdev = tmp;
90 break;
91 }
92 }
Sebastian Ott57b59182013-08-29 19:40:01 +020093 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010094 return zdev;
95}
96
Jan Glaubercd248342012-11-29 12:50:30 +010097static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
98{
99 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
100}
101
102int pci_domain_nr(struct pci_bus *bus)
103{
104 return ((struct zpci_dev *) bus->sysdata)->domain;
105}
106EXPORT_SYMBOL_GPL(pci_domain_nr);
107
108int pci_proc_domain(struct pci_bus *bus)
109{
110 return pci_domain_nr(bus);
111}
112EXPORT_SYMBOL_GPL(pci_proc_domain);
113
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100114/* Modify PCI: Register adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200115static int zpci_set_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100116{
117 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200118 struct zpci_fib fib = {0};
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100119
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200120 fib.isc = PCI_ISC;
121 fib.sum = 1; /* enable summary notifications */
122 fib.noi = airq_iv_end(zdev->aibv);
123 fib.aibv = (unsigned long) zdev->aibv->vector;
124 fib.aibvo = 0; /* each zdev has its own interrupt vector */
125 fib.aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
126 fib.aisbo = zdev->aisb & 63;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100127
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200128 return zpci_mod_fc(req, &fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100129}
130
131struct mod_pci_args {
132 u64 base;
133 u64 limit;
134 u64 iota;
Jan Glauberd0b08852012-12-11 14:53:35 +0100135 u64 fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100136};
137
138static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
139{
140 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200141 struct zpci_fib fib = {0};
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100142
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200143 fib.pba = args->base;
144 fib.pal = args->limit;
145 fib.iota = args->iota;
146 fib.fmb_addr = args->fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100147
Sebastian Ottcb4deb62013-10-22 15:19:24 +0200148 return zpci_mod_fc(req, &fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100149}
150
Jan Glauber828b35f2012-11-29 14:33:30 +0100151/* Modify PCI: Register I/O address translation parameters */
152int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
153 u64 base, u64 limit, u64 iota)
154{
Jan Glauberd0b08852012-12-11 14:53:35 +0100155 struct mod_pci_args args = { base, limit, iota, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100156
157 WARN_ON_ONCE(iota & 0x3fff);
158 args.iota |= ZPCI_IOTA_RTTO_FLAG;
159 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
160}
161
162/* Modify PCI: Unregister I/O address translation parameters */
163int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
164{
Jan Glauberd0b08852012-12-11 14:53:35 +0100165 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100166
167 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
168}
169
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100170/* Modify PCI: Unregister adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200171static int zpci_clear_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100172{
Jan Glauberd0b08852012-12-11 14:53:35 +0100173 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100174
175 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
176}
177
Jan Glauberd0b08852012-12-11 14:53:35 +0100178/* Modify PCI: Set PCI function measurement parameters */
179int zpci_fmb_enable_device(struct zpci_dev *zdev)
180{
181 struct mod_pci_args args = { 0, 0, 0, 0 };
182
183 if (zdev->fmb)
184 return -EINVAL;
185
Wei Yongjun08b42122013-02-25 22:09:25 +0800186 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
Jan Glauberd0b08852012-12-11 14:53:35 +0100187 if (!zdev->fmb)
188 return -ENOMEM;
Jan Glauberd0b08852012-12-11 14:53:35 +0100189 WARN_ON((u64) zdev->fmb & 0xf);
190
Sebastian Ott60010182015-04-10 14:33:08 +0200191 /* reset software counters */
192 atomic64_set(&zdev->allocated_pages, 0);
193 atomic64_set(&zdev->mapped_pages, 0);
194 atomic64_set(&zdev->unmapped_pages, 0);
195
Jan Glauberd0b08852012-12-11 14:53:35 +0100196 args.fmb_addr = virt_to_phys(zdev->fmb);
197 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
198}
199
200/* Modify PCI: Disable PCI function measurement */
201int zpci_fmb_disable_device(struct zpci_dev *zdev)
202{
203 struct mod_pci_args args = { 0, 0, 0, 0 };
204 int rc;
205
206 if (!zdev->fmb)
207 return -EINVAL;
208
209 /* Function measurement is disabled if fmb address is zero */
210 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
211
212 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
213 zdev->fmb = NULL;
214 return rc;
215}
216
Jan Glaubercd248342012-11-29 12:50:30 +0100217#define ZPCI_PCIAS_CFGSPC 15
218
219static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
220{
221 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
222 u64 data;
223 int rc;
224
Martin Schwidefsky93893392013-06-25 14:52:23 +0200225 rc = zpci_load(&data, req, offset);
Sebastian Ottb170bad2013-04-16 14:17:15 +0200226 if (!rc) {
227 data = data << ((8 - len) * 8);
228 data = le64_to_cpu(data);
Jan Glaubercd248342012-11-29 12:50:30 +0100229 *val = (u32) data;
Sebastian Ottb170bad2013-04-16 14:17:15 +0200230 } else
Jan Glaubercd248342012-11-29 12:50:30 +0100231 *val = 0xffffffff;
232 return rc;
233}
234
235static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
236{
237 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
238 u64 data = val;
239 int rc;
240
241 data = cpu_to_le64(data);
242 data = data >> ((8 - len) * 8);
Martin Schwidefsky93893392013-06-25 14:52:23 +0200243 rc = zpci_store(data, req, offset);
Jan Glaubercd248342012-11-29 12:50:30 +0100244 return rc;
245}
246
Greg Kroah-Hartmanb881bc42012-12-21 14:06:37 -0800247void pcibios_fixup_bus(struct pci_bus *bus)
Jan Glaubercd248342012-11-29 12:50:30 +0100248{
249}
250
251resource_size_t pcibios_align_resource(void *data, const struct resource *res,
252 resource_size_t size,
253 resource_size_t align)
254{
255 return 0;
256}
257
Jan Glauber87bc3592012-12-06 14:30:28 +0100258/* combine single writes by using store-block insn */
259void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
260{
261 zpci_memcpy_toio(to, from, count);
262}
263
Jan Glaubercd248342012-11-29 12:50:30 +0100264/* Create a virtual mapping cookie for a PCI BAR */
Michael S. Tsirkin8cfc99b2013-05-29 11:52:21 +0930265void __iomem *pci_iomap_range(struct pci_dev *pdev,
266 int bar,
267 unsigned long offset,
268 unsigned long max)
Jan Glaubercd248342012-11-29 12:50:30 +0100269{
Sebastian Ott198a5272015-06-23 14:06:35 +0200270 struct zpci_dev *zdev = to_zpci(pdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100271 int idx;
272
Sebastian Ottc0cabad2016-01-22 14:03:06 +0100273 if (!pci_resource_len(pdev, bar))
Jan Glaubercd248342012-11-29 12:50:30 +0100274 return NULL;
275
276 idx = zdev->bars[bar].map_idx;
277 spin_lock(&zpci_iomap_lock);
Michael S. Tsirkin8cfc99b2013-05-29 11:52:21 +0930278 /* Detect overrun */
Sebastian Ottf5e44f82016-01-22 14:11:21 +0100279 WARN_ON(!++zpci_iomap_start[idx].count);
280 zpci_iomap_start[idx].fh = zdev->fh;
281 zpci_iomap_start[idx].bar = bar;
Jan Glaubercd248342012-11-29 12:50:30 +0100282 spin_unlock(&zpci_iomap_lock);
283
Sebastian Ott9e00caa2016-01-22 13:58:42 +0100284 return (void __iomem *) ZPCI_ADDR(idx) + offset;
Jan Glaubercd248342012-11-29 12:50:30 +0100285}
Sebastian Ottd9426082015-02-27 16:43:55 +0100286EXPORT_SYMBOL(pci_iomap_range);
Michael S. Tsirkin8cfc99b2013-05-29 11:52:21 +0930287
288void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
289{
290 return pci_iomap_range(dev, bar, 0, maxlen);
291}
292EXPORT_SYMBOL(pci_iomap);
Jan Glaubercd248342012-11-29 12:50:30 +0100293
294void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
295{
Sebastian Ott9e00caa2016-01-22 13:58:42 +0100296 unsigned int idx = ZPCI_IDX(addr);
Jan Glaubercd248342012-11-29 12:50:30 +0100297
Jan Glaubercd248342012-11-29 12:50:30 +0100298 spin_lock(&zpci_iomap_lock);
Michael S. Tsirkin8cfc99b2013-05-29 11:52:21 +0930299 /* Detect underrun */
Sebastian Ottf5e44f82016-01-22 14:11:21 +0100300 WARN_ON(!zpci_iomap_start[idx].count);
Michael S. Tsirkin8cfc99b2013-05-29 11:52:21 +0930301 if (!--zpci_iomap_start[idx].count) {
302 zpci_iomap_start[idx].fh = 0;
303 zpci_iomap_start[idx].bar = 0;
304 }
Jan Glaubercd248342012-11-29 12:50:30 +0100305 spin_unlock(&zpci_iomap_lock);
306}
Sebastian Ottd9426082015-02-27 16:43:55 +0100307EXPORT_SYMBOL(pci_iounmap);
Jan Glaubercd248342012-11-29 12:50:30 +0100308
309static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
310 int size, u32 *val)
311{
312 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200313 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100314
315 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200316 ret = -ENODEV;
317 else
318 ret = zpci_cfg_load(zdev, where, val, size);
319
320 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100321}
322
323static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
324 int size, u32 val)
325{
326 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200327 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100328
329 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200330 ret = -ENODEV;
331 else
332 ret = zpci_cfg_store(zdev, where, val, size);
333
334 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100335}
336
337static struct pci_ops pci_root_ops = {
338 .read = pci_read,
339 .write = pci_write,
340};
341
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200342static void zpci_irq_handler(struct airq_struct *airq)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100343{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200344 unsigned long si, ai;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200345 struct airq_iv *aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200346 int irqs_on = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100347
Heiko Carstens420f42e2013-01-02 15:18:18 +0100348 inc_irq_stat(IRQIO_PCI);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200349 for (si = 0;;) {
350 /* Scan adapter summary indicator bit vector */
351 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
352 if (si == -1UL) {
353 if (irqs_on++)
354 /* End of second scan with interrupts on. */
355 break;
356 /* First scan complete, reenable interrupts. */
357 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
358 si = 0;
359 continue;
360 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100361
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200362 /* Scan the adapter interrupt vector for this device. */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200363 aibv = zpci_aibv[si];
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200364 for (ai = 0;;) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200365 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200366 if (ai == -1UL)
367 break;
Heiko Carstens420f42e2013-01-02 15:18:18 +0100368 inc_irq_stat(IRQIO_MSI);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200369 airq_iv_lock(aibv, ai);
370 generic_handle_irq(airq_iv_get_data(aibv, ai));
371 airq_iv_unlock(aibv, ai);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100372 }
373 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100374}
375
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200376int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100377{
Sebastian Ott198a5272015-06-23 14:06:35 +0200378 struct zpci_dev *zdev = to_zpci(pdev);
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000379 unsigned int hwirq, msi_vecs;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200380 unsigned long aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100381 struct msi_desc *msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200382 struct msi_msg msg;
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000383 int rc, irq;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100384
Alexander Gordeeva384c892013-12-16 09:34:54 +0100385 if (type == PCI_CAP_ID_MSI && nvec > 1)
386 return 1;
Sebastian Ottb19148f2014-10-29 19:12:04 +0100387 msi_vecs = min_t(unsigned int, nvec, zdev->max_msi);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100388
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200389 /* Allocate adapter summary indicator bit */
390 rc = -EIO;
391 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
392 if (aisb == -1UL)
393 goto out;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100394 zdev->aisb = aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100395
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200396 /* Create adapter interrupt vector */
397 rc = -ENOMEM;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200398 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200399 if (!zdev->aibv)
400 goto out_si;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100401
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200402 /* Wire up shortcut pointer */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200403 zpci_aibv[aisb] = zdev->aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200404
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200405 /* Request MSI interrupts */
406 hwirq = 0;
Jiang Liudf516f42015-07-09 16:00:39 +0800407 for_each_pci_msi_entry(msi, pdev) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200408 rc = -EIO;
409 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
Thomas Gleixner0a0a9422014-05-07 15:44:19 +0000410 if (irq < 0)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200411 goto out_msi;
412 rc = irq_set_msi_desc(irq, msi);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100413 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200414 goto out_msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200415 irq_set_chip_and_handler(irq, &zpci_irq_chip,
416 handle_simple_irq);
417 msg.data = hwirq;
418 msg.address_lo = zdev->msi_addr & 0xffffffff;
419 msg.address_hi = zdev->msi_addr >> 32;
Jiang Liu83a18912014-11-09 23:10:34 +0800420 pci_write_msi_msg(irq, &msg);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200421 airq_iv_set_data(zdev->aibv, hwirq, irq);
422 hwirq++;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100423 }
424
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200425 /* Enable adapter interrupts */
426 rc = zpci_set_airq(zdev);
427 if (rc)
428 goto out_msi;
429
430 return (msi_vecs == nvec) ? 0 : msi_vecs;
431
432out_msi:
Jiang Liudf516f42015-07-09 16:00:39 +0800433 for_each_pci_msi_entry(msi, pdev) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200434 if (hwirq-- == 0)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200435 break;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200436 irq_set_msi_desc(msi->irq, NULL);
437 irq_free_desc(msi->irq);
438 msi->msg.address_lo = 0;
439 msi->msg.address_hi = 0;
440 msi->msg.data = 0;
441 msi->irq = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100442 }
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200443 zpci_aibv[aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200444 airq_iv_release(zdev->aibv);
445out_si:
446 airq_iv_free_bit(zpci_aisb_iv, aisb);
447out:
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200448 return rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100449}
450
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200451void arch_teardown_msi_irqs(struct pci_dev *pdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100452{
Sebastian Ott198a5272015-06-23 14:06:35 +0200453 struct zpci_dev *zdev = to_zpci(pdev);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100454 struct msi_desc *msi;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200455 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100456
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200457 /* Disable adapter interrupts */
458 rc = zpci_clear_airq(zdev);
Sebastian Ott1f1dcbd2013-10-22 15:17:19 +0200459 if (rc)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100460 return;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100461
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200462 /* Release MSI interrupts */
Jiang Liudf516f42015-07-09 16:00:39 +0800463 for_each_pci_msi_entry(msi, pdev) {
Yijing Wang8fb878c2014-07-08 10:08:05 +0800464 if (msi->msi_attrib.is_msix)
Thomas Gleixner23ed8d52014-11-23 11:55:58 +0100465 __pci_msix_desc_mask_irq(msi, 1);
Yijing Wang8fb878c2014-07-08 10:08:05 +0800466 else
Thomas Gleixner23ed8d52014-11-23 11:55:58 +0100467 __pci_msi_desc_mask_irq(msi, 1, 1);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200468 irq_set_msi_desc(msi->irq, NULL);
469 irq_free_desc(msi->irq);
470 msi->msg.address_lo = 0;
471 msi->msg.address_hi = 0;
472 msi->msg.data = 0;
473 msi->irq = 0;
474 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100475
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200476 zpci_aibv[zdev->aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200477 airq_iv_release(zdev->aibv);
478 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100479}
480
Sebastian Ott1803ba22015-02-27 16:43:21 +0100481static void zpci_map_resources(struct pci_dev *pdev)
Jan Glaubercd248342012-11-29 12:50:30 +0100482{
Jan Glaubercd248342012-11-29 12:50:30 +0100483 resource_size_t len;
484 int i;
485
486 for (i = 0; i < PCI_BAR_COUNT; i++) {
487 len = pci_resource_len(pdev, i);
488 if (!len)
489 continue;
Martin Schwidefsky5b9f2082014-10-30 10:30:45 +0100490 pdev->resource[i].start =
491 (resource_size_t __force) pci_iomap(pdev, i, 0);
Jan Glaubercd248342012-11-29 12:50:30 +0100492 pdev->resource[i].end = pdev->resource[i].start + len - 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100493 }
Sebastian Ott944239c2013-06-05 16:06:16 +0200494}
495
Sebastian Ott1803ba22015-02-27 16:43:21 +0100496static void zpci_unmap_resources(struct pci_dev *pdev)
Sebastian Ott944239c2013-06-05 16:06:16 +0200497{
Sebastian Ott944239c2013-06-05 16:06:16 +0200498 resource_size_t len;
499 int i;
500
501 for (i = 0; i < PCI_BAR_COUNT; i++) {
502 len = pci_resource_len(pdev, i);
503 if (!len)
504 continue;
Martin Schwidefsky5b9f2082014-10-30 10:30:45 +0100505 pci_iounmap(pdev, (void __iomem __force *)
506 pdev->resource[i].start);
Sebastian Ott944239c2013-06-05 16:06:16 +0200507 }
508}
Jan Glaubercd248342012-11-29 12:50:30 +0100509
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100510static int __init zpci_irq_init(void)
511{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200512 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100513
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200514 rc = register_adapter_interrupt(&zpci_airq);
515 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200516 goto out;
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200517 /* Set summary to 1 to be called every time for the ISC. */
518 *zpci_airq.lsi_ptr = 1;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100519
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200520 rc = -ENOMEM;
521 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
522 if (!zpci_aisb_iv)
523 goto out_airq;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100524
Martin Schwidefsky93893392013-06-25 14:52:23 +0200525 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100526 return 0;
527
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200528out_airq:
529 unregister_adapter_interrupt(&zpci_airq);
530out:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100531 return rc;
532}
533
534static void zpci_irq_exit(void)
535{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200536 airq_iv_release(zpci_aisb_iv);
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200537 unregister_adapter_interrupt(&zpci_airq);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100538}
539
Jan Glaubercd248342012-11-29 12:50:30 +0100540static int zpci_alloc_iomap(struct zpci_dev *zdev)
541{
Sebastian Ottbf19c942016-01-22 13:59:35 +0100542 unsigned long entry;
Jan Glaubercd248342012-11-29 12:50:30 +0100543
544 spin_lock(&zpci_iomap_lock);
Sebastian Ottc506fff32016-01-22 14:01:44 +0100545 entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES);
546 if (entry == ZPCI_IOMAP_ENTRIES) {
Jan Glaubercd248342012-11-29 12:50:30 +0100547 spin_unlock(&zpci_iomap_lock);
548 return -ENOSPC;
549 }
Sebastian Ottc506fff32016-01-22 14:01:44 +0100550 set_bit(entry, zpci_iomap_bitmap);
Jan Glaubercd248342012-11-29 12:50:30 +0100551 spin_unlock(&zpci_iomap_lock);
552 return entry;
553}
554
555static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
556{
557 spin_lock(&zpci_iomap_lock);
558 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
Sebastian Ottc506fff32016-01-22 14:01:44 +0100559 clear_bit(entry, zpci_iomap_bitmap);
Jan Glaubercd248342012-11-29 12:50:30 +0100560 spin_unlock(&zpci_iomap_lock);
561}
562
Sebastian Ott7a572a3a2013-11-12 19:33:06 +0100563static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start,
564 unsigned long size, unsigned long flags)
565{
566 struct resource *r;
567
568 r = kzalloc(sizeof(*r), GFP_KERNEL);
569 if (!r)
570 return NULL;
571
572 r->start = start;
573 r->end = r->start + size - 1;
574 r->flags = flags;
575 r->name = zdev->res_name;
576
577 if (request_resource(&iomem_resource, r)) {
578 kfree(r);
579 return NULL;
580 }
581 return r;
582}
583
584static int zpci_setup_bus_resources(struct zpci_dev *zdev,
585 struct list_head *resources)
586{
587 unsigned long addr, size, flags;
588 struct resource *res;
589 int i, entry;
590
591 snprintf(zdev->res_name, sizeof(zdev->res_name),
592 "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR);
593
594 for (i = 0; i < PCI_BAR_COUNT; i++) {
595 if (!zdev->bars[i].size)
596 continue;
597 entry = zpci_alloc_iomap(zdev);
598 if (entry < 0)
599 return entry;
600 zdev->bars[i].map_idx = entry;
601
602 /* only MMIO is supported */
603 flags = IORESOURCE_MEM;
604 if (zdev->bars[i].val & 8)
605 flags |= IORESOURCE_PREFETCH;
606 if (zdev->bars[i].val & 4)
607 flags |= IORESOURCE_MEM_64;
608
Sebastian Ott9e00caa2016-01-22 13:58:42 +0100609 addr = ZPCI_ADDR(entry);
Sebastian Ott7a572a3a2013-11-12 19:33:06 +0100610 size = 1UL << zdev->bars[i].size;
611
612 res = __alloc_res(zdev, addr, size, flags);
613 if (!res) {
614 zpci_free_iomap(zdev, entry);
615 return -ENOMEM;
616 }
617 zdev->bars[i].res = res;
618 pci_add_resource(resources, res);
619 }
620
621 return 0;
622}
623
624static void zpci_cleanup_bus_resources(struct zpci_dev *zdev)
625{
626 int i;
627
628 for (i = 0; i < PCI_BAR_COUNT; i++) {
Sebastian Ott2b1df722015-07-28 19:10:45 +0200629 if (!zdev->bars[i].size || !zdev->bars[i].res)
Sebastian Ott7a572a3a2013-11-12 19:33:06 +0100630 continue;
631
632 zpci_free_iomap(zdev, zdev->bars[i].map_idx);
633 release_resource(zdev->bars[i].res);
634 kfree(zdev->bars[i].res);
635 }
636}
637
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200638int pcibios_add_device(struct pci_dev *pdev)
639{
Sebastian Ottcb809182013-08-29 19:34:37 +0200640 struct resource *res;
641 int i;
642
Sebastian Ottef4858c2014-04-30 14:50:09 -0600643 pdev->dev.groups = zpci_attr_groups;
Sebastian Ott1803ba22015-02-27 16:43:21 +0100644 zpci_map_resources(pdev);
Sebastian Ottcb809182013-08-29 19:34:37 +0200645
646 for (i = 0; i < PCI_BAR_COUNT; i++) {
647 res = &pdev->resource[i];
648 if (res->parent || !res->flags)
649 continue;
650 pci_claim_resource(pdev, i);
651 }
652
653 return 0;
654}
655
Sebastian Ott1803ba22015-02-27 16:43:21 +0100656void pcibios_release_device(struct pci_dev *pdev)
657{
658 zpci_unmap_resources(pdev);
659}
660
Sebastian Ottcb809182013-08-29 19:34:37 +0200661int pcibios_enable_device(struct pci_dev *pdev, int mask)
662{
Sebastian Ott198a5272015-06-23 14:06:35 +0200663 struct zpci_dev *zdev = to_zpci(pdev);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200664
Sebastian Ott9a996492016-01-29 15:13:30 +0100665 zpci_debug_init_device(zdev, dev_name(&pdev->dev));
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200666 zpci_fmb_enable_device(zdev);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200667
Bjorn Helgaasd7533232014-02-26 15:30:24 -0700668 return pci_enable_resources(pdev, mask);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200669}
670
Sebastian Ottcb809182013-08-29 19:34:37 +0200671void pcibios_disable_device(struct pci_dev *pdev)
Sebastian Ott944239c2013-06-05 16:06:16 +0200672{
Sebastian Ott198a5272015-06-23 14:06:35 +0200673 struct zpci_dev *zdev = to_zpci(pdev);
Sebastian Ott944239c2013-06-05 16:06:16 +0200674
Sebastian Ott944239c2013-06-05 16:06:16 +0200675 zpci_fmb_disable_device(zdev);
676 zpci_debug_exit_device(zdev);
Sebastian Ott944239c2013-06-05 16:06:16 +0200677}
678
Sebastian Ott69db3b52013-09-25 12:27:43 +0200679#ifdef CONFIG_HIBERNATE_CALLBACKS
680static int zpci_restore(struct device *dev)
681{
Sebastian Ott1803ba22015-02-27 16:43:21 +0100682 struct pci_dev *pdev = to_pci_dev(dev);
Sebastian Ott198a5272015-06-23 14:06:35 +0200683 struct zpci_dev *zdev = to_zpci(pdev);
Sebastian Ott69db3b52013-09-25 12:27:43 +0200684 int ret = 0;
685
686 if (zdev->state != ZPCI_FN_STATE_ONLINE)
687 goto out;
688
689 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
690 if (ret)
691 goto out;
692
Sebastian Ott1803ba22015-02-27 16:43:21 +0100693 zpci_map_resources(pdev);
Gerald Schaefer69eea952015-11-16 14:35:48 +0100694 zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma,
Sebastian Ott69db3b52013-09-25 12:27:43 +0200695 (u64) zdev->dma_table);
696
697out:
698 return ret;
699}
700
701static int zpci_freeze(struct device *dev)
702{
Sebastian Ott1803ba22015-02-27 16:43:21 +0100703 struct pci_dev *pdev = to_pci_dev(dev);
Sebastian Ott198a5272015-06-23 14:06:35 +0200704 struct zpci_dev *zdev = to_zpci(pdev);
Sebastian Ott69db3b52013-09-25 12:27:43 +0200705
706 if (zdev->state != ZPCI_FN_STATE_ONLINE)
707 return 0;
708
709 zpci_unregister_ioat(zdev, 0);
Sebastian Ott1803ba22015-02-27 16:43:21 +0100710 zpci_unmap_resources(pdev);
Sebastian Ott69db3b52013-09-25 12:27:43 +0200711 return clp_disable_fh(zdev);
712}
713
714struct dev_pm_ops pcibios_pm_ops = {
715 .thaw_noirq = zpci_restore,
716 .freeze_noirq = zpci_freeze,
717 .restore_noirq = zpci_restore,
718 .poweroff_noirq = zpci_freeze,
719};
720#endif /* CONFIG_HIBERNATE_CALLBACKS */
721
Jan Glaubercd248342012-11-29 12:50:30 +0100722static int zpci_alloc_domain(struct zpci_dev *zdev)
723{
724 spin_lock(&zpci_domain_lock);
725 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
726 if (zdev->domain == ZPCI_NR_DEVICES) {
727 spin_unlock(&zpci_domain_lock);
728 return -ENOSPC;
729 }
730 set_bit(zdev->domain, zpci_domain);
731 spin_unlock(&zpci_domain_lock);
732 return 0;
733}
734
735static void zpci_free_domain(struct zpci_dev *zdev)
736{
737 spin_lock(&zpci_domain_lock);
738 clear_bit(zdev->domain, zpci_domain);
739 spin_unlock(&zpci_domain_lock);
740}
741
Sebastian Ott7d594322013-11-12 19:35:01 +0100742void pcibios_remove_bus(struct pci_bus *bus)
743{
744 struct zpci_dev *zdev = get_zdev_by_bus(bus);
745
746 zpci_exit_slot(zdev);
747 zpci_cleanup_bus_resources(zdev);
748 zpci_free_domain(zdev);
749
750 spin_lock(&zpci_list_lock);
751 list_del(&zdev->entry);
752 spin_unlock(&zpci_list_lock);
753
754 kfree(zdev);
755}
756
757static int zpci_scan_bus(struct zpci_dev *zdev)
758{
759 LIST_HEAD(resources);
760 int ret;
761
762 ret = zpci_setup_bus_resources(zdev, &resources);
763 if (ret)
Sebastian Ott2b1df722015-07-28 19:10:45 +0200764 goto error;
Sebastian Ott7d594322013-11-12 19:35:01 +0100765
766 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
767 zdev, &resources);
768 if (!zdev->bus) {
Sebastian Ott2b1df722015-07-28 19:10:45 +0200769 ret = -EIO;
770 goto error;
Sebastian Ott7d594322013-11-12 19:35:01 +0100771 }
Sebastian Ott7d594322013-11-12 19:35:01 +0100772 zdev->bus->max_bus_speed = zdev->max_bus_speed;
Yijing Wangb97ea282015-03-16 11:18:56 +0800773 pci_bus_add_devices(zdev->bus);
Sebastian Ott7d594322013-11-12 19:35:01 +0100774 return 0;
Sebastian Ott2b1df722015-07-28 19:10:45 +0200775
776error:
777 zpci_cleanup_bus_resources(zdev);
778 pci_free_resource_list(&resources);
779 return ret;
Sebastian Ott7d594322013-11-12 19:35:01 +0100780}
781
Jan Glaubera755a452012-11-29 12:55:21 +0100782int zpci_enable_device(struct zpci_dev *zdev)
783{
784 int rc;
785
786 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
787 if (rc)
788 goto out;
Jan Glauber828b35f2012-11-29 14:33:30 +0100789
790 rc = zpci_dma_init_device(zdev);
791 if (rc)
792 goto out_dma;
Sebastian Ott0ff70ec2013-08-29 19:35:19 +0200793
794 zdev->state = ZPCI_FN_STATE_ONLINE;
Jan Glaubera755a452012-11-29 12:55:21 +0100795 return 0;
Jan Glauber828b35f2012-11-29 14:33:30 +0100796
797out_dma:
798 clp_disable_fh(zdev);
Jan Glaubera755a452012-11-29 12:55:21 +0100799out:
800 return rc;
801}
802EXPORT_SYMBOL_GPL(zpci_enable_device);
803
Sebastian Ottcb65a662013-04-16 14:12:17 +0200804int zpci_disable_device(struct zpci_dev *zdev)
805{
806 zpci_dma_exit_device(zdev);
807 return clp_disable_fh(zdev);
808}
809EXPORT_SYMBOL_GPL(zpci_disable_device);
810
Jan Glaubercd248342012-11-29 12:50:30 +0100811int zpci_create_device(struct zpci_dev *zdev)
812{
813 int rc;
814
815 rc = zpci_alloc_domain(zdev);
816 if (rc)
817 goto out;
818
Sebastian Ott80ed1562015-04-10 14:34:33 +0200819 mutex_init(&zdev->lock);
Sebastian Ott1c213512013-04-25 14:49:48 +0200820 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
821 rc = zpci_enable_device(zdev);
822 if (rc)
823 goto out_free;
Sebastian Ott1c213512013-04-25 14:49:48 +0200824 }
825 rc = zpci_scan_bus(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100826 if (rc)
Sebastian Ott1c213512013-04-25 14:49:48 +0200827 goto out_disable;
Jan Glaubercd248342012-11-29 12:50:30 +0100828
Sebastian Ott57b59182013-08-29 19:40:01 +0200829 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100830 list_add_tail(&zdev->entry, &zpci_list);
Sebastian Ott57b59182013-08-29 19:40:01 +0200831 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100832
Sebastian Ott67f43f32013-08-29 19:33:16 +0200833 zpci_init_slot(zdev);
834
Jan Glaubercd248342012-11-29 12:50:30 +0100835 return 0;
836
Sebastian Ott1c213512013-04-25 14:49:48 +0200837out_disable:
838 if (zdev->state == ZPCI_FN_STATE_ONLINE)
839 zpci_disable_device(zdev);
840out_free:
Jan Glaubercd248342012-11-29 12:50:30 +0100841 zpci_free_domain(zdev);
842out:
843 return rc;
844}
845
846void zpci_stop_device(struct zpci_dev *zdev)
847{
Jan Glauber828b35f2012-11-29 14:33:30 +0100848 zpci_dma_exit_device(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100849 /*
850 * Note: SCLP disables fh via set-pci-fn so don't
851 * do that here.
852 */
853}
854EXPORT_SYMBOL_GPL(zpci_stop_device);
855
Jan Glaubercd248342012-11-29 12:50:30 +0100856static inline int barsize(u8 size)
857{
858 return (size) ? (1 << size) >> 10 : 0;
859}
860
861static int zpci_mem_init(void)
862{
Sebastian Ott80c544de2016-03-14 15:47:23 +0100863 BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) ||
864 __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb));
865
Jan Glauberd0b08852012-12-11 14:53:35 +0100866 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
Sebastian Ott80c544de2016-03-14 15:47:23 +0100867 __alignof__(struct zpci_fmb), 0, NULL);
Jan Glauberd0b08852012-12-11 14:53:35 +0100868 if (!zdev_fmb_cache)
Sebastian Ottc506fff32016-01-22 14:01:44 +0100869 goto error_fmb;
Jan Glauberd0b08852012-12-11 14:53:35 +0100870
Sebastian Ottc506fff32016-01-22 14:01:44 +0100871 zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES,
872 sizeof(*zpci_iomap_start), GFP_KERNEL);
Jan Glaubercd248342012-11-29 12:50:30 +0100873 if (!zpci_iomap_start)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100874 goto error_iomap;
Jan Glaubercd248342012-11-29 12:50:30 +0100875
Sebastian Ottc506fff32016-01-22 14:01:44 +0100876 zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES),
877 sizeof(*zpci_iomap_bitmap), GFP_KERNEL);
878 if (!zpci_iomap_bitmap)
879 goto error_iomap_bitmap;
880
881 return 0;
882error_iomap_bitmap:
883 kfree(zpci_iomap_start);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100884error_iomap:
Jan Glauberd0b08852012-12-11 14:53:35 +0100885 kmem_cache_destroy(zdev_fmb_cache);
Sebastian Ottc506fff32016-01-22 14:01:44 +0100886error_fmb:
Jan Glaubercd248342012-11-29 12:50:30 +0100887 return -ENOMEM;
888}
889
890static void zpci_mem_exit(void)
891{
Sebastian Ottc506fff32016-01-22 14:01:44 +0100892 kfree(zpci_iomap_bitmap);
Jan Glaubercd248342012-11-29 12:50:30 +0100893 kfree(zpci_iomap_start);
Jan Glauberd0b08852012-12-11 14:53:35 +0100894 kmem_cache_destroy(zdev_fmb_cache);
Jan Glaubercd248342012-11-29 12:50:30 +0100895}
896
Sebastian Ott257608f2013-12-12 17:55:22 +0100897static unsigned int s390_pci_probe = 1;
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100898static unsigned int s390_pci_initialized;
Jan Glaubercd248342012-11-29 12:50:30 +0100899
900char * __init pcibios_setup(char *str)
901{
Sebastian Ott257608f2013-12-12 17:55:22 +0100902 if (!strcmp(str, "off")) {
903 s390_pci_probe = 0;
Jan Glaubercd248342012-11-29 12:50:30 +0100904 return NULL;
905 }
906 return str;
907}
908
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100909bool zpci_is_enabled(void)
910{
911 return s390_pci_initialized;
912}
913
Jan Glaubercd248342012-11-29 12:50:30 +0100914static int __init pci_base_init(void)
915{
916 int rc;
917
Heiko Carstens1e5635d2013-01-30 15:52:16 +0100918 if (!s390_pci_probe)
Jan Glaubercd248342012-11-29 12:50:30 +0100919 return 0;
920
Heiko Carstens86cd7412015-02-14 11:23:21 +0100921 if (!test_facility(69) || !test_facility(71) || !test_facility(72))
Jan Glaubercd248342012-11-29 12:50:30 +0100922 return 0;
923
Jan Glauberd0b08852012-12-11 14:53:35 +0100924 rc = zpci_debug_init();
925 if (rc)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200926 goto out;
Jan Glauberd0b08852012-12-11 14:53:35 +0100927
Jan Glaubercd248342012-11-29 12:50:30 +0100928 rc = zpci_mem_init();
929 if (rc)
930 goto out_mem;
931
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100932 rc = zpci_irq_init();
933 if (rc)
934 goto out_irq;
935
Jan Glauber828b35f2012-11-29 14:33:30 +0100936 rc = zpci_dma_init();
937 if (rc)
938 goto out_dma;
939
Sebastian Ott1d578962013-08-29 19:37:28 +0200940 rc = clp_scan_pci_devices();
Jan Glaubera755a452012-11-29 12:55:21 +0100941 if (rc)
942 goto out_find;
943
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100944 s390_pci_initialized = 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100945 return 0;
946
Jan Glaubera755a452012-11-29 12:55:21 +0100947out_find:
Jan Glauber828b35f2012-11-29 14:33:30 +0100948 zpci_dma_exit();
949out_dma:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100950 zpci_irq_exit();
951out_irq:
Jan Glaubercd248342012-11-29 12:50:30 +0100952 zpci_mem_exit();
953out_mem:
Jan Glauberd0b08852012-12-11 14:53:35 +0100954 zpci_debug_exit();
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200955out:
Jan Glaubercd248342012-11-29 12:50:30 +0100956 return rc;
957}
Sebastian Ott67f43f32013-08-29 19:33:16 +0200958subsys_initcall_sync(pci_base_init);
Sebastian Ott57b59182013-08-29 19:40:01 +0200959
960void zpci_rescan(void)
961{
Sebastian Ottaa3b7c22013-12-12 17:48:32 +0100962 if (zpci_is_enabled())
963 clp_rescan_pci_devices_simple();
Sebastian Ott57b59182013-08-29 19:40:01 +0200964}