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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
18#define COMPONENT "zPCI"
19#define pr_fmt(fmt) COMPONENT ": " fmt
20
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
51static void zpci_enable_irq(struct irq_data *data);
52static void zpci_disable_irq(struct irq_data *data);
53
54static struct irq_chip zpci_irq_chip = {
55 .name = "zPCI",
56 .irq_unmask = zpci_enable_irq,
57 .irq_mask = zpci_disable_irq,
58};
59
Jan Glaubercd248342012-11-29 12:50:30 +010060static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES);
61static DEFINE_SPINLOCK(zpci_domain_lock);
62
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +020063static struct airq_iv *zpci_aisb_iv;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +020064static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES];
Jan Glauber9a4da8a2012-11-29 13:05:05 +010065
Martin Schwidefskyf4eae942013-06-24 10:30:41 +020066/* Adapter interrupt definitions */
67static void zpci_irq_handler(struct airq_struct *airq);
68
69static struct airq_struct zpci_airq = {
70 .handler = zpci_irq_handler,
71 .isc = PCI_ISC,
72};
Jan Glauber9a4da8a2012-11-29 13:05:05 +010073
Jan Glaubercd248342012-11-29 12:50:30 +010074/* I/O Map */
75static DEFINE_SPINLOCK(zpci_iomap_lock);
76static DECLARE_BITMAP(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
77struct 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(struct pci_dev *pdev)
83{
84 return (struct zpci_dev *) pdev->sysdata;
85}
86
87struct zpci_dev *get_zdev_by_fid(u32 fid)
88{
89 struct zpci_dev *tmp, *zdev = NULL;
90
Sebastian Ott57b59182013-08-29 19:40:01 +020091 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010092 list_for_each_entry(tmp, &zpci_list, entry) {
93 if (tmp->fid == fid) {
94 zdev = tmp;
95 break;
96 }
97 }
Sebastian Ott57b59182013-08-29 19:40:01 +020098 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +010099 return zdev;
100}
101
Jan Glaubercd248342012-11-29 12:50:30 +0100102static struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus)
103{
104 return (bus && bus->sysdata) ? (struct zpci_dev *) bus->sysdata : NULL;
105}
106
107int pci_domain_nr(struct pci_bus *bus)
108{
109 return ((struct zpci_dev *) bus->sysdata)->domain;
110}
111EXPORT_SYMBOL_GPL(pci_domain_nr);
112
113int pci_proc_domain(struct pci_bus *bus)
114{
115 return pci_domain_nr(bus);
116}
117EXPORT_SYMBOL_GPL(pci_proc_domain);
118
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100119/* Modify PCI: Register adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200120static int zpci_set_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100121{
122 u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT);
123 struct zpci_fib *fib;
124 int rc;
125
126 fib = (void *) get_zeroed_page(GFP_KERNEL);
127 if (!fib)
128 return -ENOMEM;
129
130 fib->isc = PCI_ISC;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100131 fib->sum = 1; /* enable summary notifications */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200132 fib->noi = airq_iv_end(zdev->aibv);
133 fib->aibv = (unsigned long) zdev->aibv->vector;
134 fib->aibvo = 0; /* each zdev has its own interrupt vector */
135 fib->aisb = (unsigned long) zpci_aisb_iv->vector + (zdev->aisb/64)*8;
136 fib->aisbo = zdev->aisb & 63;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100137
Martin Schwidefsky93893392013-06-25 14:52:23 +0200138 rc = zpci_mod_fc(req, fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100139 pr_debug("%s mpcifc returned noi: %d\n", __func__, fib->noi);
140
141 free_page((unsigned long) fib);
142 return rc;
143}
144
145struct mod_pci_args {
146 u64 base;
147 u64 limit;
148 u64 iota;
Jan Glauberd0b08852012-12-11 14:53:35 +0100149 u64 fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100150};
151
152static int mod_pci(struct zpci_dev *zdev, int fn, u8 dmaas, struct mod_pci_args *args)
153{
154 u64 req = ZPCI_CREATE_REQ(zdev->fh, dmaas, fn);
155 struct zpci_fib *fib;
156 int rc;
157
158 /* The FIB must be available even if it's not used */
159 fib = (void *) get_zeroed_page(GFP_KERNEL);
160 if (!fib)
161 return -ENOMEM;
162
163 fib->pba = args->base;
164 fib->pal = args->limit;
165 fib->iota = args->iota;
Jan Glauberd0b08852012-12-11 14:53:35 +0100166 fib->fmb_addr = args->fmb_addr;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100167
Martin Schwidefsky93893392013-06-25 14:52:23 +0200168 rc = zpci_mod_fc(req, fib);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100169 free_page((unsigned long) fib);
170 return rc;
171}
172
Jan Glauber828b35f2012-11-29 14:33:30 +0100173/* Modify PCI: Register I/O address translation parameters */
174int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas,
175 u64 base, u64 limit, u64 iota)
176{
Jan Glauberd0b08852012-12-11 14:53:35 +0100177 struct mod_pci_args args = { base, limit, iota, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100178
179 WARN_ON_ONCE(iota & 0x3fff);
180 args.iota |= ZPCI_IOTA_RTTO_FLAG;
181 return mod_pci(zdev, ZPCI_MOD_FC_REG_IOAT, dmaas, &args);
182}
183
184/* Modify PCI: Unregister I/O address translation parameters */
185int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas)
186{
Jan Glauberd0b08852012-12-11 14:53:35 +0100187 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber828b35f2012-11-29 14:33:30 +0100188
189 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args);
190}
191
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100192/* Modify PCI: Unregister adapter interruptions */
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200193static int zpci_clear_airq(struct zpci_dev *zdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100194{
Jan Glauberd0b08852012-12-11 14:53:35 +0100195 struct mod_pci_args args = { 0, 0, 0, 0 };
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100196
197 return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args);
198}
199
Jan Glauberd0b08852012-12-11 14:53:35 +0100200/* Modify PCI: Set PCI function measurement parameters */
201int zpci_fmb_enable_device(struct zpci_dev *zdev)
202{
203 struct mod_pci_args args = { 0, 0, 0, 0 };
204
205 if (zdev->fmb)
206 return -EINVAL;
207
Wei Yongjun08b42122013-02-25 22:09:25 +0800208 zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL);
Jan Glauberd0b08852012-12-11 14:53:35 +0100209 if (!zdev->fmb)
210 return -ENOMEM;
Jan Glauberd0b08852012-12-11 14:53:35 +0100211 WARN_ON((u64) zdev->fmb & 0xf);
212
213 args.fmb_addr = virt_to_phys(zdev->fmb);
214 return mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
215}
216
217/* Modify PCI: Disable PCI function measurement */
218int zpci_fmb_disable_device(struct zpci_dev *zdev)
219{
220 struct mod_pci_args args = { 0, 0, 0, 0 };
221 int rc;
222
223 if (!zdev->fmb)
224 return -EINVAL;
225
226 /* Function measurement is disabled if fmb address is zero */
227 rc = mod_pci(zdev, ZPCI_MOD_FC_SET_MEASURE, 0, &args);
228
229 kmem_cache_free(zdev_fmb_cache, zdev->fmb);
230 zdev->fmb = NULL;
231 return rc;
232}
233
Jan Glaubercd248342012-11-29 12:50:30 +0100234#define ZPCI_PCIAS_CFGSPC 15
235
236static int zpci_cfg_load(struct zpci_dev *zdev, int offset, u32 *val, u8 len)
237{
238 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
239 u64 data;
240 int rc;
241
Martin Schwidefsky93893392013-06-25 14:52:23 +0200242 rc = zpci_load(&data, req, offset);
Sebastian Ottb170bad2013-04-16 14:17:15 +0200243 if (!rc) {
244 data = data << ((8 - len) * 8);
245 data = le64_to_cpu(data);
Jan Glaubercd248342012-11-29 12:50:30 +0100246 *val = (u32) data;
Sebastian Ottb170bad2013-04-16 14:17:15 +0200247 } else
Jan Glaubercd248342012-11-29 12:50:30 +0100248 *val = 0xffffffff;
249 return rc;
250}
251
252static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)
253{
254 u64 req = ZPCI_CREATE_REQ(zdev->fh, ZPCI_PCIAS_CFGSPC, len);
255 u64 data = val;
256 int rc;
257
258 data = cpu_to_le64(data);
259 data = data >> ((8 - len) * 8);
Martin Schwidefsky93893392013-06-25 14:52:23 +0200260 rc = zpci_store(data, req, offset);
Jan Glaubercd248342012-11-29 12:50:30 +0100261 return rc;
262}
263
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200264static int zpci_msi_set_mask_bits(struct msi_desc *msi, u32 mask, u32 flag)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100265{
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200266 int offset, pos;
267 u32 mask_bits;
268
269 if (msi->msi_attrib.is_msix) {
270 offset = msi->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE +
271 PCI_MSIX_ENTRY_VECTOR_CTRL;
272 msi->masked = readl(msi->mask_base + offset);
273 writel(flag, msi->mask_base + offset);
274 } else if (msi->msi_attrib.maskbit) {
275 pos = (long) msi->mask_base;
276 pci_read_config_dword(msi->dev, pos, &mask_bits);
277 mask_bits &= ~(mask);
278 mask_bits |= flag & mask;
279 pci_write_config_dword(msi->dev, pos, mask_bits);
280 } else
281 return 0;
282
283 msi->msi_attrib.maskbit = !!flag;
284 return 1;
285}
286
287static void zpci_enable_irq(struct irq_data *data)
288{
289 struct msi_desc *msi = irq_get_msi_desc(data->irq);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100290
291 zpci_msi_set_mask_bits(msi, 1, 0);
292}
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100293
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200294static void zpci_disable_irq(struct irq_data *data)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100295{
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200296 struct msi_desc *msi = irq_get_msi_desc(data->irq);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100297
298 zpci_msi_set_mask_bits(msi, 1, 1);
299}
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100300
Greg Kroah-Hartmanb881bc42012-12-21 14:06:37 -0800301void pcibios_fixup_bus(struct pci_bus *bus)
Jan Glaubercd248342012-11-29 12:50:30 +0100302{
303}
304
305resource_size_t pcibios_align_resource(void *data, const struct resource *res,
306 resource_size_t size,
307 resource_size_t align)
308{
309 return 0;
310}
311
Jan Glauber87bc3592012-12-06 14:30:28 +0100312/* combine single writes by using store-block insn */
313void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
314{
315 zpci_memcpy_toio(to, from, count);
316}
317
Jan Glaubercd248342012-11-29 12:50:30 +0100318/* Create a virtual mapping cookie for a PCI BAR */
319void __iomem *pci_iomap(struct pci_dev *pdev, int bar, unsigned long max)
320{
321 struct zpci_dev *zdev = get_zdev(pdev);
322 u64 addr;
323 int idx;
324
325 if ((bar & 7) != bar)
326 return NULL;
327
328 idx = zdev->bars[bar].map_idx;
329 spin_lock(&zpci_iomap_lock);
330 zpci_iomap_start[idx].fh = zdev->fh;
331 zpci_iomap_start[idx].bar = bar;
332 spin_unlock(&zpci_iomap_lock);
333
334 addr = ZPCI_IOMAP_ADDR_BASE | ((u64) idx << 48);
335 return (void __iomem *) addr;
336}
337EXPORT_SYMBOL_GPL(pci_iomap);
338
339void pci_iounmap(struct pci_dev *pdev, void __iomem *addr)
340{
341 unsigned int idx;
342
343 idx = (((__force u64) addr) & ~ZPCI_IOMAP_ADDR_BASE) >> 48;
344 spin_lock(&zpci_iomap_lock);
345 zpci_iomap_start[idx].fh = 0;
346 zpci_iomap_start[idx].bar = 0;
347 spin_unlock(&zpci_iomap_lock);
348}
349EXPORT_SYMBOL_GPL(pci_iounmap);
350
351static int pci_read(struct pci_bus *bus, unsigned int devfn, int where,
352 int size, u32 *val)
353{
354 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200355 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100356
357 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200358 ret = -ENODEV;
359 else
360 ret = zpci_cfg_load(zdev, where, val, size);
361
362 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100363}
364
365static int pci_write(struct pci_bus *bus, unsigned int devfn, int where,
366 int size, u32 val)
367{
368 struct zpci_dev *zdev = get_zdev_by_bus(bus);
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200369 int ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100370
371 if (!zdev || devfn != ZPCI_DEVFN)
Sebastian Ott2c3700b2013-04-16 14:18:41 +0200372 ret = -ENODEV;
373 else
374 ret = zpci_cfg_store(zdev, where, val, size);
375
376 return ret;
Jan Glaubercd248342012-11-29 12:50:30 +0100377}
378
379static struct pci_ops pci_root_ops = {
380 .read = pci_read,
381 .write = pci_write,
382};
383
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200384static void zpci_irq_handler(struct airq_struct *airq)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100385{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200386 unsigned long si, ai;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200387 struct airq_iv *aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200388 int irqs_on = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100389
Heiko Carstens420f42e2013-01-02 15:18:18 +0100390 inc_irq_stat(IRQIO_PCI);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200391 for (si = 0;;) {
392 /* Scan adapter summary indicator bit vector */
393 si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv));
394 if (si == -1UL) {
395 if (irqs_on++)
396 /* End of second scan with interrupts on. */
397 break;
398 /* First scan complete, reenable interrupts. */
399 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
400 si = 0;
401 continue;
402 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100403
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200404 /* Scan the adapter interrupt vector for this device. */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200405 aibv = zpci_aibv[si];
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200406 for (ai = 0;;) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200407 ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv));
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200408 if (ai == -1UL)
409 break;
Heiko Carstens420f42e2013-01-02 15:18:18 +0100410 inc_irq_stat(IRQIO_MSI);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200411 airq_iv_lock(aibv, ai);
412 generic_handle_irq(airq_iv_get_data(aibv, ai));
413 airq_iv_unlock(aibv, ai);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100414 }
415 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100416}
417
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200418int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100419{
420 struct zpci_dev *zdev = get_zdev(pdev);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200421 unsigned int hwirq, irq, msi_vecs;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200422 unsigned long aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100423 struct msi_desc *msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200424 struct msi_msg msg;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100425 int rc;
426
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200427 pr_debug("%s: requesting %d MSI-X interrupts...", __func__, nvec);
428 if (type != PCI_CAP_ID_MSIX && type != PCI_CAP_ID_MSI)
429 return -EINVAL;
430 msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200431 msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100432
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200433 /* Allocate adapter summary indicator bit */
434 rc = -EIO;
435 aisb = airq_iv_alloc_bit(zpci_aisb_iv);
436 if (aisb == -1UL)
437 goto out;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100438 zdev->aisb = aisb;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100439
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200440 /* Create adapter interrupt vector */
441 rc = -ENOMEM;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200442 zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200443 if (!zdev->aibv)
444 goto out_si;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100445
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200446 /* Wire up shortcut pointer */
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200447 zpci_aibv[aisb] = zdev->aibv;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200448
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200449 /* Request MSI interrupts */
450 hwirq = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100451 list_for_each_entry(msi, &pdev->msi_list, list) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200452 rc = -EIO;
453 irq = irq_alloc_desc(0); /* Alloc irq on node 0 */
454 if (irq == NO_IRQ)
455 goto out_msi;
456 rc = irq_set_msi_desc(irq, msi);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100457 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200458 goto out_msi;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200459 irq_set_chip_and_handler(irq, &zpci_irq_chip,
460 handle_simple_irq);
461 msg.data = hwirq;
462 msg.address_lo = zdev->msi_addr & 0xffffffff;
463 msg.address_hi = zdev->msi_addr >> 32;
464 write_msi_msg(irq, &msg);
465 airq_iv_set_data(zdev->aibv, hwirq, irq);
466 hwirq++;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100467 }
468
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200469 /* Enable adapter interrupts */
470 rc = zpci_set_airq(zdev);
471 if (rc)
472 goto out_msi;
473
474 return (msi_vecs == nvec) ? 0 : msi_vecs;
475
476out_msi:
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200477 list_for_each_entry(msi, &pdev->msi_list, list) {
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200478 if (hwirq-- == 0)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200479 break;
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200480 irq_set_msi_desc(msi->irq, NULL);
481 irq_free_desc(msi->irq);
482 msi->msg.address_lo = 0;
483 msi->msg.address_hi = 0;
484 msi->msg.data = 0;
485 msi->irq = 0;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100486 }
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200487 zpci_aibv[aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200488 airq_iv_release(zdev->aibv);
489out_si:
490 airq_iv_free_bit(zpci_aisb_iv, aisb);
491out:
492 dev_err(&pdev->dev, "register MSI failed with: %d\n", rc);
493 return rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100494}
495
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200496void arch_teardown_msi_irqs(struct pci_dev *pdev)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100497{
498 struct zpci_dev *zdev = get_zdev(pdev);
499 struct msi_desc *msi;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200500 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100501
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200502 pr_info("%s: on pdev: %p\n", __func__, pdev);
503
504 /* Disable adapter interrupts */
505 rc = zpci_clear_airq(zdev);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100506 if (rc) {
507 dev_err(&pdev->dev, "deregister MSI failed with: %d\n", rc);
508 return;
509 }
510
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200511 /* Release MSI interrupts */
512 list_for_each_entry(msi, &pdev->msi_list, list) {
513 zpci_msi_set_mask_bits(msi, 1, 1);
514 irq_set_msi_desc(msi->irq, NULL);
515 irq_free_desc(msi->irq);
516 msi->msg.address_lo = 0;
517 msi->msg.address_hi = 0;
518 msi->msg.data = 0;
519 msi->irq = 0;
520 }
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100521
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200522 zpci_aibv[zdev->aisb] = NULL;
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200523 airq_iv_release(zdev->aibv);
524 airq_iv_free_bit(zpci_aisb_iv, zdev->aisb);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100525}
526
Jan Glaubercd248342012-11-29 12:50:30 +0100527static void zpci_map_resources(struct zpci_dev *zdev)
528{
529 struct pci_dev *pdev = zdev->pdev;
530 resource_size_t len;
531 int i;
532
533 for (i = 0; i < PCI_BAR_COUNT; i++) {
534 len = pci_resource_len(pdev, i);
535 if (!len)
536 continue;
537 pdev->resource[i].start = (resource_size_t) pci_iomap(pdev, i, 0);
538 pdev->resource[i].end = pdev->resource[i].start + len - 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100539 }
Sebastian Ott944239c2013-06-05 16:06:16 +0200540}
541
542static void zpci_unmap_resources(struct zpci_dev *zdev)
543{
544 struct pci_dev *pdev = zdev->pdev;
545 resource_size_t len;
546 int i;
547
548 for (i = 0; i < PCI_BAR_COUNT; i++) {
549 len = pci_resource_len(pdev, i);
550 if (!len)
551 continue;
552 pci_iounmap(pdev, (void *) pdev->resource[i].start);
553 }
554}
Jan Glaubercd248342012-11-29 12:50:30 +0100555
Jan Glaubercd248342012-11-29 12:50:30 +0100556struct zpci_dev *zpci_alloc_device(void)
557{
558 struct zpci_dev *zdev;
559
560 /* Alloc memory for our private pci device data */
561 zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200562 return zdev ? : ERR_PTR(-ENOMEM);
Jan Glaubercd248342012-11-29 12:50:30 +0100563}
564
565void zpci_free_device(struct zpci_dev *zdev)
566{
567 kfree(zdev);
568}
569
Jan Glauber1e8da952012-11-29 14:36:55 +0100570int pcibios_add_platform_entries(struct pci_dev *pdev)
571{
572 return zpci_sysfs_add_device(&pdev->dev);
573}
574
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100575static int __init zpci_irq_init(void)
576{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200577 int rc;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100578
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200579 rc = register_adapter_interrupt(&zpci_airq);
580 if (rc)
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200581 goto out;
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200582 /* Set summary to 1 to be called every time for the ISC. */
583 *zpci_airq.lsi_ptr = 1;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100584
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200585 rc = -ENOMEM;
586 zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC);
587 if (!zpci_aisb_iv)
588 goto out_airq;
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100589
Martin Schwidefsky93893392013-06-25 14:52:23 +0200590 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100591 return 0;
592
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200593out_airq:
594 unregister_adapter_interrupt(&zpci_airq);
595out:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100596 return rc;
597}
598
599static void zpci_irq_exit(void)
600{
Martin Schwidefsky5d0d8f42013-06-25 16:36:29 +0200601 airq_iv_release(zpci_aisb_iv);
Martin Schwidefskyf4eae942013-06-24 10:30:41 +0200602 unregister_adapter_interrupt(&zpci_airq);
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100603}
604
Jan Glaubercd248342012-11-29 12:50:30 +0100605static struct resource *zpci_alloc_bus_resource(unsigned long start, unsigned long size,
606 unsigned long flags, int domain)
607{
608 struct resource *r;
609 char *name;
610 int rc;
611
612 r = kzalloc(sizeof(*r), GFP_KERNEL);
613 if (!r)
614 return ERR_PTR(-ENOMEM);
615 r->start = start;
616 r->end = r->start + size - 1;
617 r->flags = flags;
618 r->parent = &iomem_resource;
619 name = kmalloc(18, GFP_KERNEL);
620 if (!name) {
621 kfree(r);
622 return ERR_PTR(-ENOMEM);
623 }
624 sprintf(name, "PCI Bus: %04x:%02x", domain, ZPCI_BUS_NR);
625 r->name = name;
626
627 rc = request_resource(&iomem_resource, r);
628 if (rc)
629 pr_debug("request resource %pR failed\n", r);
630 return r;
631}
632
633static int zpci_alloc_iomap(struct zpci_dev *zdev)
634{
635 int entry;
636
637 spin_lock(&zpci_iomap_lock);
638 entry = find_first_zero_bit(zpci_iomap, ZPCI_IOMAP_MAX_ENTRIES);
639 if (entry == ZPCI_IOMAP_MAX_ENTRIES) {
640 spin_unlock(&zpci_iomap_lock);
641 return -ENOSPC;
642 }
643 set_bit(entry, zpci_iomap);
644 spin_unlock(&zpci_iomap_lock);
645 return entry;
646}
647
648static void zpci_free_iomap(struct zpci_dev *zdev, int entry)
649{
650 spin_lock(&zpci_iomap_lock);
651 memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry));
652 clear_bit(entry, zpci_iomap);
653 spin_unlock(&zpci_iomap_lock);
654}
655
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200656int pcibios_add_device(struct pci_dev *pdev)
657{
658 struct zpci_dev *zdev = get_zdev(pdev);
Sebastian Ottcb809182013-08-29 19:34:37 +0200659 struct resource *res;
660 int i;
661
662 zdev->pdev = pdev;
663 zpci_map_resources(zdev);
664
665 for (i = 0; i < PCI_BAR_COUNT; i++) {
666 res = &pdev->resource[i];
667 if (res->parent || !res->flags)
668 continue;
669 pci_claim_resource(pdev, i);
670 }
671
672 return 0;
673}
674
675int pcibios_enable_device(struct pci_dev *pdev, int mask)
676{
677 struct zpci_dev *zdev = get_zdev(pdev);
678 struct resource *res;
679 u16 cmd;
680 int i;
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200681
Sebastian Ott1c213512013-04-25 14:49:48 +0200682 zdev->pdev = pdev;
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200683 zpci_debug_init_device(zdev);
684 zpci_fmb_enable_device(zdev);
685 zpci_map_resources(zdev);
686
Sebastian Ottcb809182013-08-29 19:34:37 +0200687 pci_read_config_word(pdev, PCI_COMMAND, &cmd);
688 for (i = 0; i < PCI_BAR_COUNT; i++) {
689 res = &pdev->resource[i];
690
691 if (res->flags & IORESOURCE_IO)
692 return -EINVAL;
693
694 if (res->flags & IORESOURCE_MEM)
695 cmd |= PCI_COMMAND_MEMORY;
696 }
697 pci_write_config_word(pdev, PCI_COMMAND, cmd);
Sebastian Ottaf0a8a82013-04-16 14:13:21 +0200698 return 0;
699}
700
Sebastian Ottcb809182013-08-29 19:34:37 +0200701void pcibios_disable_device(struct pci_dev *pdev)
Sebastian Ott944239c2013-06-05 16:06:16 +0200702{
703 struct zpci_dev *zdev = get_zdev(pdev);
704
705 zpci_unmap_resources(zdev);
706 zpci_fmb_disable_device(zdev);
707 zpci_debug_exit_device(zdev);
708 zdev->pdev = NULL;
709}
710
Sebastian Ott69db3b52013-09-25 12:27:43 +0200711#ifdef CONFIG_HIBERNATE_CALLBACKS
712static int zpci_restore(struct device *dev)
713{
714 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
715 int ret = 0;
716
717 if (zdev->state != ZPCI_FN_STATE_ONLINE)
718 goto out;
719
720 ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
721 if (ret)
722 goto out;
723
724 zpci_map_resources(zdev);
725 zpci_register_ioat(zdev, 0, zdev->start_dma + PAGE_OFFSET,
726 zdev->start_dma + zdev->iommu_size - 1,
727 (u64) zdev->dma_table);
728
729out:
730 return ret;
731}
732
733static int zpci_freeze(struct device *dev)
734{
735 struct zpci_dev *zdev = get_zdev(to_pci_dev(dev));
736
737 if (zdev->state != ZPCI_FN_STATE_ONLINE)
738 return 0;
739
740 zpci_unregister_ioat(zdev, 0);
741 return clp_disable_fh(zdev);
742}
743
744struct dev_pm_ops pcibios_pm_ops = {
745 .thaw_noirq = zpci_restore,
746 .freeze_noirq = zpci_freeze,
747 .restore_noirq = zpci_restore,
748 .poweroff_noirq = zpci_freeze,
749};
750#endif /* CONFIG_HIBERNATE_CALLBACKS */
751
Sebastian Ott1c213512013-04-25 14:49:48 +0200752static int zpci_scan_bus(struct zpci_dev *zdev)
Jan Glaubercd248342012-11-29 12:50:30 +0100753{
754 struct resource *res;
755 LIST_HEAD(resources);
756 int i;
757
758 /* allocate mapping entry for each used bar */
759 for (i = 0; i < PCI_BAR_COUNT; i++) {
760 unsigned long addr, size, flags;
761 int entry;
762
763 if (!zdev->bars[i].size)
764 continue;
765 entry = zpci_alloc_iomap(zdev);
766 if (entry < 0)
767 return entry;
768 zdev->bars[i].map_idx = entry;
769
770 /* only MMIO is supported */
771 flags = IORESOURCE_MEM;
772 if (zdev->bars[i].val & 8)
773 flags |= IORESOURCE_PREFETCH;
774 if (zdev->bars[i].val & 4)
775 flags |= IORESOURCE_MEM_64;
776
777 addr = ZPCI_IOMAP_ADDR_BASE + ((u64) entry << 48);
778
779 size = 1UL << zdev->bars[i].size;
780
781 res = zpci_alloc_bus_resource(addr, size, flags, zdev->domain);
782 if (IS_ERR(res)) {
783 zpci_free_iomap(zdev, entry);
784 return PTR_ERR(res);
785 }
786 pci_add_resource(&resources, res);
787 }
788
Sebastian Ott1c213512013-04-25 14:49:48 +0200789 zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops,
790 zdev, &resources);
Jan Glaubercd248342012-11-29 12:50:30 +0100791 if (!zdev->bus)
792 return -EIO;
793
794 zdev->bus->max_bus_speed = zdev->max_bus_speed;
795 return 0;
796}
797
798static int zpci_alloc_domain(struct zpci_dev *zdev)
799{
800 spin_lock(&zpci_domain_lock);
801 zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES);
802 if (zdev->domain == ZPCI_NR_DEVICES) {
803 spin_unlock(&zpci_domain_lock);
804 return -ENOSPC;
805 }
806 set_bit(zdev->domain, zpci_domain);
807 spin_unlock(&zpci_domain_lock);
808 return 0;
809}
810
811static void zpci_free_domain(struct zpci_dev *zdev)
812{
813 spin_lock(&zpci_domain_lock);
814 clear_bit(zdev->domain, zpci_domain);
815 spin_unlock(&zpci_domain_lock);
816}
817
Jan Glaubera755a452012-11-29 12:55:21 +0100818int zpci_enable_device(struct zpci_dev *zdev)
819{
820 int rc;
821
822 rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES);
823 if (rc)
824 goto out;
825 pr_info("Enabled fh: 0x%x fid: 0x%x\n", zdev->fh, zdev->fid);
Jan Glauber828b35f2012-11-29 14:33:30 +0100826
827 rc = zpci_dma_init_device(zdev);
828 if (rc)
829 goto out_dma;
Sebastian Ott0ff70ec2013-08-29 19:35:19 +0200830
831 zdev->state = ZPCI_FN_STATE_ONLINE;
Jan Glaubera755a452012-11-29 12:55:21 +0100832 return 0;
Jan Glauber828b35f2012-11-29 14:33:30 +0100833
834out_dma:
835 clp_disable_fh(zdev);
Jan Glaubera755a452012-11-29 12:55:21 +0100836out:
837 return rc;
838}
839EXPORT_SYMBOL_GPL(zpci_enable_device);
840
Sebastian Ottcb65a662013-04-16 14:12:17 +0200841int zpci_disable_device(struct zpci_dev *zdev)
842{
843 zpci_dma_exit_device(zdev);
844 return clp_disable_fh(zdev);
845}
846EXPORT_SYMBOL_GPL(zpci_disable_device);
847
Jan Glaubercd248342012-11-29 12:50:30 +0100848int zpci_create_device(struct zpci_dev *zdev)
849{
850 int rc;
851
852 rc = zpci_alloc_domain(zdev);
853 if (rc)
854 goto out;
855
Sebastian Ott1c213512013-04-25 14:49:48 +0200856 if (zdev->state == ZPCI_FN_STATE_CONFIGURED) {
857 rc = zpci_enable_device(zdev);
858 if (rc)
859 goto out_free;
Sebastian Ott1c213512013-04-25 14:49:48 +0200860 }
861 rc = zpci_scan_bus(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100862 if (rc)
Sebastian Ott1c213512013-04-25 14:49:48 +0200863 goto out_disable;
Jan Glaubercd248342012-11-29 12:50:30 +0100864
Sebastian Ott57b59182013-08-29 19:40:01 +0200865 spin_lock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100866 list_add_tail(&zdev->entry, &zpci_list);
Sebastian Ott57b59182013-08-29 19:40:01 +0200867 spin_unlock(&zpci_list_lock);
Jan Glaubercd248342012-11-29 12:50:30 +0100868
Sebastian Ott67f43f32013-08-29 19:33:16 +0200869 zpci_init_slot(zdev);
870
Jan Glaubercd248342012-11-29 12:50:30 +0100871 return 0;
872
Sebastian Ott1c213512013-04-25 14:49:48 +0200873out_disable:
874 if (zdev->state == ZPCI_FN_STATE_ONLINE)
875 zpci_disable_device(zdev);
876out_free:
Jan Glaubercd248342012-11-29 12:50:30 +0100877 zpci_free_domain(zdev);
878out:
879 return rc;
880}
881
882void zpci_stop_device(struct zpci_dev *zdev)
883{
Jan Glauber828b35f2012-11-29 14:33:30 +0100884 zpci_dma_exit_device(zdev);
Jan Glaubercd248342012-11-29 12:50:30 +0100885 /*
886 * Note: SCLP disables fh via set-pci-fn so don't
887 * do that here.
888 */
889}
890EXPORT_SYMBOL_GPL(zpci_stop_device);
891
Jan Glaubercd248342012-11-29 12:50:30 +0100892static inline int barsize(u8 size)
893{
894 return (size) ? (1 << size) >> 10 : 0;
895}
896
897static int zpci_mem_init(void)
898{
Jan Glauberd0b08852012-12-11 14:53:35 +0100899 zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb),
900 16, 0, NULL);
901 if (!zdev_fmb_cache)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200902 goto error_zdev;
Jan Glauberd0b08852012-12-11 14:53:35 +0100903
Jan Glaubercd248342012-11-29 12:50:30 +0100904 /* TODO: use realloc */
905 zpci_iomap_start = kzalloc(ZPCI_IOMAP_MAX_ENTRIES * sizeof(*zpci_iomap_start),
906 GFP_KERNEL);
907 if (!zpci_iomap_start)
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100908 goto error_iomap;
Jan Glaubercd248342012-11-29 12:50:30 +0100909 return 0;
910
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100911error_iomap:
Jan Glauberd0b08852012-12-11 14:53:35 +0100912 kmem_cache_destroy(zdev_fmb_cache);
Jan Glaubercd248342012-11-29 12:50:30 +0100913error_zdev:
914 return -ENOMEM;
915}
916
917static void zpci_mem_exit(void)
918{
919 kfree(zpci_iomap_start);
Jan Glauberd0b08852012-12-11 14:53:35 +0100920 kmem_cache_destroy(zdev_fmb_cache);
Jan Glaubercd248342012-11-29 12:50:30 +0100921}
922
Sebastian Ott67f43f32013-08-29 19:33:16 +0200923static unsigned int s390_pci_probe;
Jan Glaubercd248342012-11-29 12:50:30 +0100924
925char * __init pcibios_setup(char *str)
926{
Sebastian Ott89b0dc952013-04-16 14:19:22 +0200927 if (!strcmp(str, "on")) {
928 s390_pci_probe = 1;
Jan Glaubercd248342012-11-29 12:50:30 +0100929 return NULL;
930 }
931 return str;
932}
933
934static int __init pci_base_init(void)
935{
936 int rc;
937
Heiko Carstens1e5635d2013-01-30 15:52:16 +0100938 if (!s390_pci_probe)
Jan Glaubercd248342012-11-29 12:50:30 +0100939 return 0;
940
941 if (!test_facility(2) || !test_facility(69)
942 || !test_facility(71) || !test_facility(72))
943 return 0;
944
945 pr_info("Probing PCI hardware: PCI:%d SID:%d AEN:%d\n",
946 test_facility(69), test_facility(70),
947 test_facility(71));
948
Jan Glauberd0b08852012-12-11 14:53:35 +0100949 rc = zpci_debug_init();
950 if (rc)
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200951 goto out;
Jan Glauberd0b08852012-12-11 14:53:35 +0100952
Jan Glaubercd248342012-11-29 12:50:30 +0100953 rc = zpci_mem_init();
954 if (rc)
955 goto out_mem;
956
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100957 rc = zpci_irq_init();
958 if (rc)
959 goto out_irq;
960
Jan Glauber828b35f2012-11-29 14:33:30 +0100961 rc = zpci_dma_init();
962 if (rc)
963 goto out_dma;
964
Sebastian Ott1d578962013-08-29 19:37:28 +0200965 rc = clp_scan_pci_devices();
Jan Glaubera755a452012-11-29 12:55:21 +0100966 if (rc)
967 goto out_find;
968
Jan Glaubercd248342012-11-29 12:50:30 +0100969 return 0;
970
Jan Glaubera755a452012-11-29 12:55:21 +0100971out_find:
Jan Glauber828b35f2012-11-29 14:33:30 +0100972 zpci_dma_exit();
973out_dma:
Jan Glauber9a4da8a2012-11-29 13:05:05 +0100974 zpci_irq_exit();
975out_irq:
Jan Glaubercd248342012-11-29 12:50:30 +0100976 zpci_mem_exit();
977out_mem:
Jan Glauberd0b08852012-12-11 14:53:35 +0100978 zpci_debug_exit();
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200979out:
Jan Glaubercd248342012-11-29 12:50:30 +0100980 return rc;
981}
Sebastian Ott67f43f32013-08-29 19:33:16 +0200982subsys_initcall_sync(pci_base_init);
Sebastian Ott57b59182013-08-29 19:40:01 +0200983
984void zpci_rescan(void)
985{
986 clp_rescan_pci_devices_simple();
987}