Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 1 | /* |
| 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 Glauber | bedef75 | 2012-12-06 14:06:28 +0100 | [diff] [blame] | 9 | * Alexander Schmidt |
| 10 | * Christoph Raisch |
| 11 | * Hannes Hering |
| 12 | * Hoang-Nam Nguyen |
| 13 | * Jan-Bernd Themann |
| 14 | * Stefan Roscher |
| 15 | * Thomas Klein |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 16 | */ |
| 17 | |
Gerald Schaefer | 896cb7e | 2014-07-16 17:21:01 +0200 | [diff] [blame] | 18 | #define KMSG_COMPONENT "zpci" |
| 19 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 26 | #include <linux/irq.h> |
| 27 | #include <linux/kernel_stat.h> |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 28 | #include <linux/seq_file.h> |
| 29 | #include <linux/pci.h> |
| 30 | #include <linux/msi.h> |
| 31 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 32 | #include <asm/isc.h> |
| 33 | #include <asm/airq.h> |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 34 | #include <asm/facility.h> |
| 35 | #include <asm/pci_insn.h> |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 36 | #include <asm/pci_clp.h> |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 37 | #include <asm/pci_dma.h> |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 38 | |
| 39 | #define DEBUG /* enable pr_debug */ |
| 40 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 41 | #define SIC_IRQ_MODE_ALL 0 |
| 42 | #define SIC_IRQ_MODE_SINGLE 1 |
| 43 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 44 | #define ZPCI_NR_DMA_SPACES 1 |
| 45 | #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS |
| 46 | |
| 47 | /* list of all detected zpci devices */ |
Sebastian Ott | 67f43f3 | 2013-08-29 19:33:16 +0200 | [diff] [blame] | 48 | static LIST_HEAD(zpci_list); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 49 | static DEFINE_SPINLOCK(zpci_list_lock); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 50 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 51 | static struct irq_chip zpci_irq_chip = { |
| 52 | .name = "zPCI", |
Thomas Gleixner | 280510f | 2014-11-23 12:23:20 +0100 | [diff] [blame] | 53 | .irq_unmask = pci_msi_unmask_irq, |
| 54 | .irq_mask = pci_msi_mask_irq, |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 55 | }; |
| 56 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 57 | static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES); |
| 58 | static DEFINE_SPINLOCK(zpci_domain_lock); |
| 59 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 60 | static struct airq_iv *zpci_aisb_iv; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 61 | static struct airq_iv *zpci_aibv[ZPCI_NR_DEVICES]; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 62 | |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 63 | /* Adapter interrupt definitions */ |
| 64 | static void zpci_irq_handler(struct airq_struct *airq); |
| 65 | |
| 66 | static struct airq_struct zpci_airq = { |
| 67 | .handler = zpci_irq_handler, |
| 68 | .isc = PCI_ISC, |
| 69 | }; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 70 | |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 71 | #define ZPCI_IOMAP_ENTRIES \ |
| 72 | min(((unsigned long) CONFIG_PCI_NR_FUNCTIONS * PCI_BAR_COUNT), \ |
| 73 | ZPCI_IOMAP_MAX_ENTRIES) |
| 74 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 75 | static DEFINE_SPINLOCK(zpci_iomap_lock); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 76 | static unsigned long *zpci_iomap_bitmap; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 77 | struct zpci_iomap_entry *zpci_iomap_start; |
| 78 | EXPORT_SYMBOL_GPL(zpci_iomap_start); |
| 79 | |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 80 | static struct kmem_cache *zdev_fmb_cache; |
| 81 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 82 | struct zpci_dev *get_zdev_by_fid(u32 fid) |
| 83 | { |
| 84 | struct zpci_dev *tmp, *zdev = NULL; |
| 85 | |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 86 | spin_lock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 87 | list_for_each_entry(tmp, &zpci_list, entry) { |
| 88 | if (tmp->fid == fid) { |
| 89 | zdev = tmp; |
| 90 | break; |
| 91 | } |
| 92 | } |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 93 | spin_unlock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 94 | return zdev; |
| 95 | } |
| 96 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 97 | static 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 | |
| 102 | int pci_domain_nr(struct pci_bus *bus) |
| 103 | { |
| 104 | return ((struct zpci_dev *) bus->sysdata)->domain; |
| 105 | } |
| 106 | EXPORT_SYMBOL_GPL(pci_domain_nr); |
| 107 | |
| 108 | int pci_proc_domain(struct pci_bus *bus) |
| 109 | { |
| 110 | return pci_domain_nr(bus); |
| 111 | } |
| 112 | EXPORT_SYMBOL_GPL(pci_proc_domain); |
| 113 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 114 | /* Modify PCI: Register adapter interruptions */ |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 115 | static int zpci_set_airq(struct zpci_dev *zdev) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 116 | { |
| 117 | u64 req = ZPCI_CREATE_REQ(zdev->fh, 0, ZPCI_MOD_FC_REG_INT); |
Sebastian Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 118 | struct zpci_fib fib = {0}; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 119 | |
Sebastian Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 120 | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 127 | |
Sebastian Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 128 | return zpci_mod_fc(req, &fib); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 129 | } |
| 130 | |
| 131 | struct mod_pci_args { |
| 132 | u64 base; |
| 133 | u64 limit; |
| 134 | u64 iota; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 135 | u64 fmb_addr; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 136 | }; |
| 137 | |
| 138 | static 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 Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 141 | struct zpci_fib fib = {0}; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 142 | |
Sebastian Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 143 | fib.pba = args->base; |
| 144 | fib.pal = args->limit; |
| 145 | fib.iota = args->iota; |
| 146 | fib.fmb_addr = args->fmb_addr; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 147 | |
Sebastian Ott | cb4deb6 | 2013-10-22 15:19:24 +0200 | [diff] [blame] | 148 | return zpci_mod_fc(req, &fib); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 149 | } |
| 150 | |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 151 | /* Modify PCI: Register I/O address translation parameters */ |
| 152 | int zpci_register_ioat(struct zpci_dev *zdev, u8 dmaas, |
| 153 | u64 base, u64 limit, u64 iota) |
| 154 | { |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 155 | struct mod_pci_args args = { base, limit, iota, 0 }; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 156 | |
| 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 */ |
| 163 | int zpci_unregister_ioat(struct zpci_dev *zdev, u8 dmaas) |
| 164 | { |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 165 | struct mod_pci_args args = { 0, 0, 0, 0 }; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 166 | |
| 167 | return mod_pci(zdev, ZPCI_MOD_FC_DEREG_IOAT, dmaas, &args); |
| 168 | } |
| 169 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 170 | /* Modify PCI: Unregister adapter interruptions */ |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 171 | static int zpci_clear_airq(struct zpci_dev *zdev) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 172 | { |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 173 | struct mod_pci_args args = { 0, 0, 0, 0 }; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 174 | |
| 175 | return mod_pci(zdev, ZPCI_MOD_FC_DEREG_INT, 0, &args); |
| 176 | } |
| 177 | |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 178 | /* Modify PCI: Set PCI function measurement parameters */ |
| 179 | int 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 Yongjun | 08b4212 | 2013-02-25 22:09:25 +0800 | [diff] [blame] | 186 | zdev->fmb = kmem_cache_zalloc(zdev_fmb_cache, GFP_KERNEL); |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 187 | if (!zdev->fmb) |
| 188 | return -ENOMEM; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 189 | WARN_ON((u64) zdev->fmb & 0xf); |
| 190 | |
Sebastian Ott | 6001018 | 2015-04-10 14:33:08 +0200 | [diff] [blame] | 191 | /* 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 Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 196 | 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 */ |
| 201 | int 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 Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 217 | #define ZPCI_PCIAS_CFGSPC 15 |
| 218 | |
| 219 | static 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 Schwidefsky | 9389339 | 2013-06-25 14:52:23 +0200 | [diff] [blame] | 225 | rc = zpci_load(&data, req, offset); |
Sebastian Ott | b170bad | 2013-04-16 14:17:15 +0200 | [diff] [blame] | 226 | if (!rc) { |
| 227 | data = data << ((8 - len) * 8); |
| 228 | data = le64_to_cpu(data); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 229 | *val = (u32) data; |
Sebastian Ott | b170bad | 2013-04-16 14:17:15 +0200 | [diff] [blame] | 230 | } else |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 231 | *val = 0xffffffff; |
| 232 | return rc; |
| 233 | } |
| 234 | |
| 235 | static 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 Schwidefsky | 9389339 | 2013-06-25 14:52:23 +0200 | [diff] [blame] | 243 | rc = zpci_store(data, req, offset); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 244 | return rc; |
| 245 | } |
| 246 | |
Greg Kroah-Hartman | b881bc4 | 2012-12-21 14:06:37 -0800 | [diff] [blame] | 247 | void pcibios_fixup_bus(struct pci_bus *bus) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 248 | { |
| 249 | } |
| 250 | |
| 251 | resource_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 Glauber | 87bc359 | 2012-12-06 14:30:28 +0100 | [diff] [blame] | 258 | /* combine single writes by using store-block insn */ |
| 259 | void __iowrite64_copy(void __iomem *to, const void *from, size_t count) |
| 260 | { |
| 261 | zpci_memcpy_toio(to, from, count); |
| 262 | } |
| 263 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 264 | /* Create a virtual mapping cookie for a PCI BAR */ |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 265 | void __iomem *pci_iomap_range(struct pci_dev *pdev, |
| 266 | int bar, |
| 267 | unsigned long offset, |
| 268 | unsigned long max) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 269 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 270 | struct zpci_dev *zdev = to_zpci(pdev); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 271 | int idx; |
| 272 | |
Sebastian Ott | c0cabad | 2016-01-22 14:03:06 +0100 | [diff] [blame] | 273 | if (!pci_resource_len(pdev, bar)) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 274 | return NULL; |
| 275 | |
| 276 | idx = zdev->bars[bar].map_idx; |
| 277 | spin_lock(&zpci_iomap_lock); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 278 | if (zpci_iomap_start[idx].count++) { |
| 279 | BUG_ON(zpci_iomap_start[idx].fh != zdev->fh || |
| 280 | zpci_iomap_start[idx].bar != bar); |
| 281 | } else { |
| 282 | zpci_iomap_start[idx].fh = zdev->fh; |
| 283 | zpci_iomap_start[idx].bar = bar; |
| 284 | } |
| 285 | /* Detect overrun */ |
| 286 | BUG_ON(!zpci_iomap_start[idx].count); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 287 | spin_unlock(&zpci_iomap_lock); |
| 288 | |
Sebastian Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 289 | return (void __iomem *) ZPCI_ADDR(idx) + offset; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 290 | } |
Sebastian Ott | d942608 | 2015-02-27 16:43:55 +0100 | [diff] [blame] | 291 | EXPORT_SYMBOL(pci_iomap_range); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 292 | |
| 293 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) |
| 294 | { |
| 295 | return pci_iomap_range(dev, bar, 0, maxlen); |
| 296 | } |
| 297 | EXPORT_SYMBOL(pci_iomap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 298 | |
| 299 | void pci_iounmap(struct pci_dev *pdev, void __iomem *addr) |
| 300 | { |
Sebastian Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 301 | unsigned int idx = ZPCI_IDX(addr); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 302 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 303 | spin_lock(&zpci_iomap_lock); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 304 | /* Detect underrun */ |
| 305 | BUG_ON(!zpci_iomap_start[idx].count); |
| 306 | if (!--zpci_iomap_start[idx].count) { |
| 307 | zpci_iomap_start[idx].fh = 0; |
| 308 | zpci_iomap_start[idx].bar = 0; |
| 309 | } |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 310 | spin_unlock(&zpci_iomap_lock); |
| 311 | } |
Sebastian Ott | d942608 | 2015-02-27 16:43:55 +0100 | [diff] [blame] | 312 | EXPORT_SYMBOL(pci_iounmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 313 | |
| 314 | static int pci_read(struct pci_bus *bus, unsigned int devfn, int where, |
| 315 | int size, u32 *val) |
| 316 | { |
| 317 | struct zpci_dev *zdev = get_zdev_by_bus(bus); |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 318 | int ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 319 | |
| 320 | if (!zdev || devfn != ZPCI_DEVFN) |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 321 | ret = -ENODEV; |
| 322 | else |
| 323 | ret = zpci_cfg_load(zdev, where, val, size); |
| 324 | |
| 325 | return ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, |
| 329 | int size, u32 val) |
| 330 | { |
| 331 | struct zpci_dev *zdev = get_zdev_by_bus(bus); |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 332 | int ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 333 | |
| 334 | if (!zdev || devfn != ZPCI_DEVFN) |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 335 | ret = -ENODEV; |
| 336 | else |
| 337 | ret = zpci_cfg_store(zdev, where, val, size); |
| 338 | |
| 339 | return ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | static struct pci_ops pci_root_ops = { |
| 343 | .read = pci_read, |
| 344 | .write = pci_write, |
| 345 | }; |
| 346 | |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 347 | static void zpci_irq_handler(struct airq_struct *airq) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 348 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 349 | unsigned long si, ai; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 350 | struct airq_iv *aibv; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 351 | int irqs_on = 0; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 352 | |
Heiko Carstens | 420f42e | 2013-01-02 15:18:18 +0100 | [diff] [blame] | 353 | inc_irq_stat(IRQIO_PCI); |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 354 | for (si = 0;;) { |
| 355 | /* Scan adapter summary indicator bit vector */ |
| 356 | si = airq_iv_scan(zpci_aisb_iv, si, airq_iv_end(zpci_aisb_iv)); |
| 357 | if (si == -1UL) { |
| 358 | if (irqs_on++) |
| 359 | /* End of second scan with interrupts on. */ |
| 360 | break; |
| 361 | /* First scan complete, reenable interrupts. */ |
| 362 | zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC); |
| 363 | si = 0; |
| 364 | continue; |
| 365 | } |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 366 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 367 | /* Scan the adapter interrupt vector for this device. */ |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 368 | aibv = zpci_aibv[si]; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 369 | for (ai = 0;;) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 370 | ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv)); |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 371 | if (ai == -1UL) |
| 372 | break; |
Heiko Carstens | 420f42e | 2013-01-02 15:18:18 +0100 | [diff] [blame] | 373 | inc_irq_stat(IRQIO_MSI); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 374 | airq_iv_lock(aibv, ai); |
| 375 | generic_handle_irq(airq_iv_get_data(aibv, ai)); |
| 376 | airq_iv_unlock(aibv, ai); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 377 | } |
| 378 | } |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 379 | } |
| 380 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 381 | int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 382 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 383 | struct zpci_dev *zdev = to_zpci(pdev); |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 384 | unsigned int hwirq, msi_vecs; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 385 | unsigned long aisb; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 386 | struct msi_desc *msi; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 387 | struct msi_msg msg; |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 388 | int rc, irq; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 389 | |
Alexander Gordeev | a384c89 | 2013-12-16 09:34:54 +0100 | [diff] [blame] | 390 | if (type == PCI_CAP_ID_MSI && nvec > 1) |
| 391 | return 1; |
Sebastian Ott | b19148f | 2014-10-29 19:12:04 +0100 | [diff] [blame] | 392 | msi_vecs = min_t(unsigned int, nvec, zdev->max_msi); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 393 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 394 | /* Allocate adapter summary indicator bit */ |
| 395 | rc = -EIO; |
| 396 | aisb = airq_iv_alloc_bit(zpci_aisb_iv); |
| 397 | if (aisb == -1UL) |
| 398 | goto out; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 399 | zdev->aisb = aisb; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 400 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 401 | /* Create adapter interrupt vector */ |
| 402 | rc = -ENOMEM; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 403 | zdev->aibv = airq_iv_create(msi_vecs, AIRQ_IV_DATA | AIRQ_IV_BITLOCK); |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 404 | if (!zdev->aibv) |
| 405 | goto out_si; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 406 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 407 | /* Wire up shortcut pointer */ |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 408 | zpci_aibv[aisb] = zdev->aibv; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 409 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 410 | /* Request MSI interrupts */ |
| 411 | hwirq = 0; |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 412 | for_each_pci_msi_entry(msi, pdev) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 413 | rc = -EIO; |
| 414 | irq = irq_alloc_desc(0); /* Alloc irq on node 0 */ |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 415 | if (irq < 0) |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 416 | goto out_msi; |
| 417 | rc = irq_set_msi_desc(irq, msi); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 418 | if (rc) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 419 | goto out_msi; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 420 | irq_set_chip_and_handler(irq, &zpci_irq_chip, |
| 421 | handle_simple_irq); |
| 422 | msg.data = hwirq; |
| 423 | msg.address_lo = zdev->msi_addr & 0xffffffff; |
| 424 | msg.address_hi = zdev->msi_addr >> 32; |
Jiang Liu | 83a1891 | 2014-11-09 23:10:34 +0800 | [diff] [blame] | 425 | pci_write_msi_msg(irq, &msg); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 426 | airq_iv_set_data(zdev->aibv, hwirq, irq); |
| 427 | hwirq++; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 428 | } |
| 429 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 430 | /* Enable adapter interrupts */ |
| 431 | rc = zpci_set_airq(zdev); |
| 432 | if (rc) |
| 433 | goto out_msi; |
| 434 | |
| 435 | return (msi_vecs == nvec) ? 0 : msi_vecs; |
| 436 | |
| 437 | out_msi: |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 438 | for_each_pci_msi_entry(msi, pdev) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 439 | if (hwirq-- == 0) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 440 | break; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 441 | irq_set_msi_desc(msi->irq, NULL); |
| 442 | irq_free_desc(msi->irq); |
| 443 | msi->msg.address_lo = 0; |
| 444 | msi->msg.address_hi = 0; |
| 445 | msi->msg.data = 0; |
| 446 | msi->irq = 0; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 447 | } |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 448 | zpci_aibv[aisb] = NULL; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 449 | airq_iv_release(zdev->aibv); |
| 450 | out_si: |
| 451 | airq_iv_free_bit(zpci_aisb_iv, aisb); |
| 452 | out: |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 453 | return rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 454 | } |
| 455 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 456 | void arch_teardown_msi_irqs(struct pci_dev *pdev) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 457 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 458 | struct zpci_dev *zdev = to_zpci(pdev); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 459 | struct msi_desc *msi; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 460 | int rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 461 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 462 | /* Disable adapter interrupts */ |
| 463 | rc = zpci_clear_airq(zdev); |
Sebastian Ott | 1f1dcbd | 2013-10-22 15:17:19 +0200 | [diff] [blame] | 464 | if (rc) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 465 | return; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 466 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 467 | /* Release MSI interrupts */ |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 468 | for_each_pci_msi_entry(msi, pdev) { |
Yijing Wang | 8fb878c | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 469 | if (msi->msi_attrib.is_msix) |
Thomas Gleixner | 23ed8d5 | 2014-11-23 11:55:58 +0100 | [diff] [blame] | 470 | __pci_msix_desc_mask_irq(msi, 1); |
Yijing Wang | 8fb878c | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 471 | else |
Thomas Gleixner | 23ed8d5 | 2014-11-23 11:55:58 +0100 | [diff] [blame] | 472 | __pci_msi_desc_mask_irq(msi, 1, 1); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 473 | irq_set_msi_desc(msi->irq, NULL); |
| 474 | irq_free_desc(msi->irq); |
| 475 | msi->msg.address_lo = 0; |
| 476 | msi->msg.address_hi = 0; |
| 477 | msi->msg.data = 0; |
| 478 | msi->irq = 0; |
| 479 | } |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 480 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 481 | zpci_aibv[zdev->aisb] = NULL; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 482 | airq_iv_release(zdev->aibv); |
| 483 | airq_iv_free_bit(zpci_aisb_iv, zdev->aisb); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 484 | } |
| 485 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 486 | static void zpci_map_resources(struct pci_dev *pdev) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 487 | { |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 488 | resource_size_t len; |
| 489 | int i; |
| 490 | |
| 491 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
| 492 | len = pci_resource_len(pdev, i); |
| 493 | if (!len) |
| 494 | continue; |
Martin Schwidefsky | 5b9f208 | 2014-10-30 10:30:45 +0100 | [diff] [blame] | 495 | pdev->resource[i].start = |
| 496 | (resource_size_t __force) pci_iomap(pdev, i, 0); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 497 | pdev->resource[i].end = pdev->resource[i].start + len - 1; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 498 | } |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 499 | } |
| 500 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 501 | static void zpci_unmap_resources(struct pci_dev *pdev) |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 502 | { |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 503 | resource_size_t len; |
| 504 | int i; |
| 505 | |
| 506 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
| 507 | len = pci_resource_len(pdev, i); |
| 508 | if (!len) |
| 509 | continue; |
Martin Schwidefsky | 5b9f208 | 2014-10-30 10:30:45 +0100 | [diff] [blame] | 510 | pci_iounmap(pdev, (void __iomem __force *) |
| 511 | pdev->resource[i].start); |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 512 | } |
| 513 | } |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 514 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 515 | static int __init zpci_irq_init(void) |
| 516 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 517 | int rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 518 | |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 519 | rc = register_adapter_interrupt(&zpci_airq); |
| 520 | if (rc) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 521 | goto out; |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 522 | /* Set summary to 1 to be called every time for the ISC. */ |
| 523 | *zpci_airq.lsi_ptr = 1; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 524 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 525 | rc = -ENOMEM; |
| 526 | zpci_aisb_iv = airq_iv_create(ZPCI_NR_DEVICES, AIRQ_IV_ALLOC); |
| 527 | if (!zpci_aisb_iv) |
| 528 | goto out_airq; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 529 | |
Martin Schwidefsky | 9389339 | 2013-06-25 14:52:23 +0200 | [diff] [blame] | 530 | zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 531 | return 0; |
| 532 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 533 | out_airq: |
| 534 | unregister_adapter_interrupt(&zpci_airq); |
| 535 | out: |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 536 | return rc; |
| 537 | } |
| 538 | |
| 539 | static void zpci_irq_exit(void) |
| 540 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 541 | airq_iv_release(zpci_aisb_iv); |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 542 | unregister_adapter_interrupt(&zpci_airq); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 543 | } |
| 544 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 545 | static int zpci_alloc_iomap(struct zpci_dev *zdev) |
| 546 | { |
Sebastian Ott | bf19c94 | 2016-01-22 13:59:35 +0100 | [diff] [blame] | 547 | unsigned long entry; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 548 | |
| 549 | spin_lock(&zpci_iomap_lock); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 550 | entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES); |
| 551 | if (entry == ZPCI_IOMAP_ENTRIES) { |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 552 | spin_unlock(&zpci_iomap_lock); |
| 553 | return -ENOSPC; |
| 554 | } |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 555 | set_bit(entry, zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 556 | spin_unlock(&zpci_iomap_lock); |
| 557 | return entry; |
| 558 | } |
| 559 | |
| 560 | static void zpci_free_iomap(struct zpci_dev *zdev, int entry) |
| 561 | { |
| 562 | spin_lock(&zpci_iomap_lock); |
| 563 | memset(&zpci_iomap_start[entry], 0, sizeof(struct zpci_iomap_entry)); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 564 | clear_bit(entry, zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 565 | spin_unlock(&zpci_iomap_lock); |
| 566 | } |
| 567 | |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 568 | static struct resource *__alloc_res(struct zpci_dev *zdev, unsigned long start, |
| 569 | unsigned long size, unsigned long flags) |
| 570 | { |
| 571 | struct resource *r; |
| 572 | |
| 573 | r = kzalloc(sizeof(*r), GFP_KERNEL); |
| 574 | if (!r) |
| 575 | return NULL; |
| 576 | |
| 577 | r->start = start; |
| 578 | r->end = r->start + size - 1; |
| 579 | r->flags = flags; |
| 580 | r->name = zdev->res_name; |
| 581 | |
| 582 | if (request_resource(&iomem_resource, r)) { |
| 583 | kfree(r); |
| 584 | return NULL; |
| 585 | } |
| 586 | return r; |
| 587 | } |
| 588 | |
| 589 | static int zpci_setup_bus_resources(struct zpci_dev *zdev, |
| 590 | struct list_head *resources) |
| 591 | { |
| 592 | unsigned long addr, size, flags; |
| 593 | struct resource *res; |
| 594 | int i, entry; |
| 595 | |
| 596 | snprintf(zdev->res_name, sizeof(zdev->res_name), |
| 597 | "PCI Bus %04x:%02x", zdev->domain, ZPCI_BUS_NR); |
| 598 | |
| 599 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
| 600 | if (!zdev->bars[i].size) |
| 601 | continue; |
| 602 | entry = zpci_alloc_iomap(zdev); |
| 603 | if (entry < 0) |
| 604 | return entry; |
| 605 | zdev->bars[i].map_idx = entry; |
| 606 | |
| 607 | /* only MMIO is supported */ |
| 608 | flags = IORESOURCE_MEM; |
| 609 | if (zdev->bars[i].val & 8) |
| 610 | flags |= IORESOURCE_PREFETCH; |
| 611 | if (zdev->bars[i].val & 4) |
| 612 | flags |= IORESOURCE_MEM_64; |
| 613 | |
Sebastian Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 614 | addr = ZPCI_ADDR(entry); |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 615 | size = 1UL << zdev->bars[i].size; |
| 616 | |
| 617 | res = __alloc_res(zdev, addr, size, flags); |
| 618 | if (!res) { |
| 619 | zpci_free_iomap(zdev, entry); |
| 620 | return -ENOMEM; |
| 621 | } |
| 622 | zdev->bars[i].res = res; |
| 623 | pci_add_resource(resources, res); |
| 624 | } |
| 625 | |
| 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | static void zpci_cleanup_bus_resources(struct zpci_dev *zdev) |
| 630 | { |
| 631 | int i; |
| 632 | |
| 633 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 634 | if (!zdev->bars[i].size || !zdev->bars[i].res) |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 635 | continue; |
| 636 | |
| 637 | zpci_free_iomap(zdev, zdev->bars[i].map_idx); |
| 638 | release_resource(zdev->bars[i].res); |
| 639 | kfree(zdev->bars[i].res); |
| 640 | } |
| 641 | } |
| 642 | |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 643 | int pcibios_add_device(struct pci_dev *pdev) |
| 644 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 645 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 646 | struct resource *res; |
| 647 | int i; |
| 648 | |
| 649 | zdev->pdev = pdev; |
Sebastian Ott | ef4858c | 2014-04-30 14:50:09 -0600 | [diff] [blame] | 650 | pdev->dev.groups = zpci_attr_groups; |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 651 | zpci_map_resources(pdev); |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 652 | |
| 653 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
| 654 | res = &pdev->resource[i]; |
| 655 | if (res->parent || !res->flags) |
| 656 | continue; |
| 657 | pci_claim_resource(pdev, i); |
| 658 | } |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 663 | void pcibios_release_device(struct pci_dev *pdev) |
| 664 | { |
| 665 | zpci_unmap_resources(pdev); |
| 666 | } |
| 667 | |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 668 | int pcibios_enable_device(struct pci_dev *pdev, int mask) |
| 669 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 670 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 671 | |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 672 | zdev->pdev = pdev; |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 673 | zpci_debug_init_device(zdev); |
| 674 | zpci_fmb_enable_device(zdev); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 675 | |
Bjorn Helgaas | d753323 | 2014-02-26 15:30:24 -0700 | [diff] [blame] | 676 | return pci_enable_resources(pdev, mask); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 677 | } |
| 678 | |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 679 | void pcibios_disable_device(struct pci_dev *pdev) |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 680 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 681 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 682 | |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 683 | zpci_fmb_disable_device(zdev); |
| 684 | zpci_debug_exit_device(zdev); |
| 685 | zdev->pdev = NULL; |
| 686 | } |
| 687 | |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 688 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
| 689 | static int zpci_restore(struct device *dev) |
| 690 | { |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 691 | struct pci_dev *pdev = to_pci_dev(dev); |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 692 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 693 | int ret = 0; |
| 694 | |
| 695 | if (zdev->state != ZPCI_FN_STATE_ONLINE) |
| 696 | goto out; |
| 697 | |
| 698 | ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES); |
| 699 | if (ret) |
| 700 | goto out; |
| 701 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 702 | zpci_map_resources(pdev); |
Gerald Schaefer | 69eea95 | 2015-11-16 14:35:48 +0100 | [diff] [blame] | 703 | zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 704 | (u64) zdev->dma_table); |
| 705 | |
| 706 | out: |
| 707 | return ret; |
| 708 | } |
| 709 | |
| 710 | static int zpci_freeze(struct device *dev) |
| 711 | { |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 712 | struct pci_dev *pdev = to_pci_dev(dev); |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 713 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 714 | |
| 715 | if (zdev->state != ZPCI_FN_STATE_ONLINE) |
| 716 | return 0; |
| 717 | |
| 718 | zpci_unregister_ioat(zdev, 0); |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 719 | zpci_unmap_resources(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 720 | return clp_disable_fh(zdev); |
| 721 | } |
| 722 | |
| 723 | struct dev_pm_ops pcibios_pm_ops = { |
| 724 | .thaw_noirq = zpci_restore, |
| 725 | .freeze_noirq = zpci_freeze, |
| 726 | .restore_noirq = zpci_restore, |
| 727 | .poweroff_noirq = zpci_freeze, |
| 728 | }; |
| 729 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
| 730 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 731 | static int zpci_alloc_domain(struct zpci_dev *zdev) |
| 732 | { |
| 733 | spin_lock(&zpci_domain_lock); |
| 734 | zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES); |
| 735 | if (zdev->domain == ZPCI_NR_DEVICES) { |
| 736 | spin_unlock(&zpci_domain_lock); |
| 737 | return -ENOSPC; |
| 738 | } |
| 739 | set_bit(zdev->domain, zpci_domain); |
| 740 | spin_unlock(&zpci_domain_lock); |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | static void zpci_free_domain(struct zpci_dev *zdev) |
| 745 | { |
| 746 | spin_lock(&zpci_domain_lock); |
| 747 | clear_bit(zdev->domain, zpci_domain); |
| 748 | spin_unlock(&zpci_domain_lock); |
| 749 | } |
| 750 | |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 751 | void pcibios_remove_bus(struct pci_bus *bus) |
| 752 | { |
| 753 | struct zpci_dev *zdev = get_zdev_by_bus(bus); |
| 754 | |
| 755 | zpci_exit_slot(zdev); |
| 756 | zpci_cleanup_bus_resources(zdev); |
| 757 | zpci_free_domain(zdev); |
| 758 | |
| 759 | spin_lock(&zpci_list_lock); |
| 760 | list_del(&zdev->entry); |
| 761 | spin_unlock(&zpci_list_lock); |
| 762 | |
| 763 | kfree(zdev); |
| 764 | } |
| 765 | |
| 766 | static int zpci_scan_bus(struct zpci_dev *zdev) |
| 767 | { |
| 768 | LIST_HEAD(resources); |
| 769 | int ret; |
| 770 | |
| 771 | ret = zpci_setup_bus_resources(zdev, &resources); |
| 772 | if (ret) |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 773 | goto error; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 774 | |
| 775 | zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops, |
| 776 | zdev, &resources); |
| 777 | if (!zdev->bus) { |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 778 | ret = -EIO; |
| 779 | goto error; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 780 | } |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 781 | zdev->bus->max_bus_speed = zdev->max_bus_speed; |
Yijing Wang | b97ea28 | 2015-03-16 11:18:56 +0800 | [diff] [blame] | 782 | pci_bus_add_devices(zdev->bus); |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 783 | return 0; |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 784 | |
| 785 | error: |
| 786 | zpci_cleanup_bus_resources(zdev); |
| 787 | pci_free_resource_list(&resources); |
| 788 | return ret; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 789 | } |
| 790 | |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 791 | int zpci_enable_device(struct zpci_dev *zdev) |
| 792 | { |
| 793 | int rc; |
| 794 | |
| 795 | rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES); |
| 796 | if (rc) |
| 797 | goto out; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 798 | |
| 799 | rc = zpci_dma_init_device(zdev); |
| 800 | if (rc) |
| 801 | goto out_dma; |
Sebastian Ott | 0ff70ec | 2013-08-29 19:35:19 +0200 | [diff] [blame] | 802 | |
| 803 | zdev->state = ZPCI_FN_STATE_ONLINE; |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 804 | return 0; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 805 | |
| 806 | out_dma: |
| 807 | clp_disable_fh(zdev); |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 808 | out: |
| 809 | return rc; |
| 810 | } |
| 811 | EXPORT_SYMBOL_GPL(zpci_enable_device); |
| 812 | |
Sebastian Ott | cb65a66 | 2013-04-16 14:12:17 +0200 | [diff] [blame] | 813 | int zpci_disable_device(struct zpci_dev *zdev) |
| 814 | { |
| 815 | zpci_dma_exit_device(zdev); |
| 816 | return clp_disable_fh(zdev); |
| 817 | } |
| 818 | EXPORT_SYMBOL_GPL(zpci_disable_device); |
| 819 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 820 | int zpci_create_device(struct zpci_dev *zdev) |
| 821 | { |
| 822 | int rc; |
| 823 | |
| 824 | rc = zpci_alloc_domain(zdev); |
| 825 | if (rc) |
| 826 | goto out; |
| 827 | |
Sebastian Ott | 80ed156 | 2015-04-10 14:34:33 +0200 | [diff] [blame] | 828 | mutex_init(&zdev->lock); |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 829 | if (zdev->state == ZPCI_FN_STATE_CONFIGURED) { |
| 830 | rc = zpci_enable_device(zdev); |
| 831 | if (rc) |
| 832 | goto out_free; |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 833 | } |
| 834 | rc = zpci_scan_bus(zdev); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 835 | if (rc) |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 836 | goto out_disable; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 837 | |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 838 | spin_lock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 839 | list_add_tail(&zdev->entry, &zpci_list); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 840 | spin_unlock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 841 | |
Sebastian Ott | 67f43f3 | 2013-08-29 19:33:16 +0200 | [diff] [blame] | 842 | zpci_init_slot(zdev); |
| 843 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 844 | return 0; |
| 845 | |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 846 | out_disable: |
| 847 | if (zdev->state == ZPCI_FN_STATE_ONLINE) |
| 848 | zpci_disable_device(zdev); |
| 849 | out_free: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 850 | zpci_free_domain(zdev); |
| 851 | out: |
| 852 | return rc; |
| 853 | } |
| 854 | |
| 855 | void zpci_stop_device(struct zpci_dev *zdev) |
| 856 | { |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 857 | zpci_dma_exit_device(zdev); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 858 | /* |
| 859 | * Note: SCLP disables fh via set-pci-fn so don't |
| 860 | * do that here. |
| 861 | */ |
| 862 | } |
| 863 | EXPORT_SYMBOL_GPL(zpci_stop_device); |
| 864 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 865 | static inline int barsize(u8 size) |
| 866 | { |
| 867 | return (size) ? (1 << size) >> 10 : 0; |
| 868 | } |
| 869 | |
| 870 | static int zpci_mem_init(void) |
| 871 | { |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 872 | zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb), |
| 873 | 16, 0, NULL); |
| 874 | if (!zdev_fmb_cache) |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 875 | goto error_fmb; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 876 | |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 877 | zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES, |
| 878 | sizeof(*zpci_iomap_start), GFP_KERNEL); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 879 | if (!zpci_iomap_start) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 880 | goto error_iomap; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 881 | |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 882 | zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES), |
| 883 | sizeof(*zpci_iomap_bitmap), GFP_KERNEL); |
| 884 | if (!zpci_iomap_bitmap) |
| 885 | goto error_iomap_bitmap; |
| 886 | |
| 887 | return 0; |
| 888 | error_iomap_bitmap: |
| 889 | kfree(zpci_iomap_start); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 890 | error_iomap: |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 891 | kmem_cache_destroy(zdev_fmb_cache); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 892 | error_fmb: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 893 | return -ENOMEM; |
| 894 | } |
| 895 | |
| 896 | static void zpci_mem_exit(void) |
| 897 | { |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 898 | kfree(zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 899 | kfree(zpci_iomap_start); |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 900 | kmem_cache_destroy(zdev_fmb_cache); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 901 | } |
| 902 | |
Sebastian Ott | 257608f | 2013-12-12 17:55:22 +0100 | [diff] [blame] | 903 | static unsigned int s390_pci_probe = 1; |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 904 | static unsigned int s390_pci_initialized; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 905 | |
| 906 | char * __init pcibios_setup(char *str) |
| 907 | { |
Sebastian Ott | 257608f | 2013-12-12 17:55:22 +0100 | [diff] [blame] | 908 | if (!strcmp(str, "off")) { |
| 909 | s390_pci_probe = 0; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 910 | return NULL; |
| 911 | } |
| 912 | return str; |
| 913 | } |
| 914 | |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 915 | bool zpci_is_enabled(void) |
| 916 | { |
| 917 | return s390_pci_initialized; |
| 918 | } |
| 919 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 920 | static int __init pci_base_init(void) |
| 921 | { |
| 922 | int rc; |
| 923 | |
Heiko Carstens | 1e5635d | 2013-01-30 15:52:16 +0100 | [diff] [blame] | 924 | if (!s390_pci_probe) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 925 | return 0; |
| 926 | |
Heiko Carstens | 86cd741 | 2015-02-14 11:23:21 +0100 | [diff] [blame] | 927 | if (!test_facility(69) || !test_facility(71) || !test_facility(72)) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 928 | return 0; |
| 929 | |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 930 | rc = zpci_debug_init(); |
| 931 | if (rc) |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 932 | goto out; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 933 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 934 | rc = zpci_mem_init(); |
| 935 | if (rc) |
| 936 | goto out_mem; |
| 937 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 938 | rc = zpci_irq_init(); |
| 939 | if (rc) |
| 940 | goto out_irq; |
| 941 | |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 942 | rc = zpci_dma_init(); |
| 943 | if (rc) |
| 944 | goto out_dma; |
| 945 | |
Sebastian Ott | 1d57896 | 2013-08-29 19:37:28 +0200 | [diff] [blame] | 946 | rc = clp_scan_pci_devices(); |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 947 | if (rc) |
| 948 | goto out_find; |
| 949 | |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 950 | s390_pci_initialized = 1; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 951 | return 0; |
| 952 | |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 953 | out_find: |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 954 | zpci_dma_exit(); |
| 955 | out_dma: |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 956 | zpci_irq_exit(); |
| 957 | out_irq: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 958 | zpci_mem_exit(); |
| 959 | out_mem: |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 960 | zpci_debug_exit(); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 961 | out: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 962 | return rc; |
| 963 | } |
Sebastian Ott | 67f43f3 | 2013-08-29 19:33:16 +0200 | [diff] [blame] | 964 | subsys_initcall_sync(pci_base_init); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 965 | |
| 966 | void zpci_rescan(void) |
| 967 | { |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 968 | if (zpci_is_enabled()) |
| 969 | clp_rescan_pci_devices_simple(); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 970 | } |