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 | /* Detect overrun */ |
Sebastian Ott | f5e44f8 | 2016-01-22 14:11:21 +0100 | [diff] [blame] | 279 | WARN_ON(!++zpci_iomap_start[idx].count); |
| 280 | zpci_iomap_start[idx].fh = zdev->fh; |
| 281 | zpci_iomap_start[idx].bar = bar; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 282 | spin_unlock(&zpci_iomap_lock); |
| 283 | |
Sebastian Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 284 | return (void __iomem *) ZPCI_ADDR(idx) + offset; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 285 | } |
Sebastian Ott | d942608 | 2015-02-27 16:43:55 +0100 | [diff] [blame] | 286 | EXPORT_SYMBOL(pci_iomap_range); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 287 | |
| 288 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) |
| 289 | { |
| 290 | return pci_iomap_range(dev, bar, 0, maxlen); |
| 291 | } |
| 292 | EXPORT_SYMBOL(pci_iomap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 293 | |
| 294 | void pci_iounmap(struct pci_dev *pdev, void __iomem *addr) |
| 295 | { |
Sebastian Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 296 | unsigned int idx = ZPCI_IDX(addr); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 297 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 298 | spin_lock(&zpci_iomap_lock); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 299 | /* Detect underrun */ |
Sebastian Ott | f5e44f8 | 2016-01-22 14:11:21 +0100 | [diff] [blame] | 300 | WARN_ON(!zpci_iomap_start[idx].count); |
Michael S. Tsirkin | 8cfc99b | 2013-05-29 11:52:21 +0930 | [diff] [blame] | 301 | if (!--zpci_iomap_start[idx].count) { |
| 302 | zpci_iomap_start[idx].fh = 0; |
| 303 | zpci_iomap_start[idx].bar = 0; |
| 304 | } |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 305 | spin_unlock(&zpci_iomap_lock); |
| 306 | } |
Sebastian Ott | d942608 | 2015-02-27 16:43:55 +0100 | [diff] [blame] | 307 | EXPORT_SYMBOL(pci_iounmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 308 | |
| 309 | static 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 Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 313 | int ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 314 | |
| 315 | if (!zdev || devfn != ZPCI_DEVFN) |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 316 | ret = -ENODEV; |
| 317 | else |
| 318 | ret = zpci_cfg_load(zdev, where, val, size); |
| 319 | |
| 320 | return ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | static 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 Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 327 | int ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 328 | |
| 329 | if (!zdev || devfn != ZPCI_DEVFN) |
Sebastian Ott | 2c3700b | 2013-04-16 14:18:41 +0200 | [diff] [blame] | 330 | ret = -ENODEV; |
| 331 | else |
| 332 | ret = zpci_cfg_store(zdev, where, val, size); |
| 333 | |
| 334 | return ret; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 335 | } |
| 336 | |
| 337 | static struct pci_ops pci_root_ops = { |
| 338 | .read = pci_read, |
| 339 | .write = pci_write, |
| 340 | }; |
| 341 | |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 342 | static void zpci_irq_handler(struct airq_struct *airq) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 343 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 344 | unsigned long si, ai; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 345 | struct airq_iv *aibv; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 346 | int irqs_on = 0; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 347 | |
Heiko Carstens | 420f42e | 2013-01-02 15:18:18 +0100 | [diff] [blame] | 348 | inc_irq_stat(IRQIO_PCI); |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 349 | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 361 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 362 | /* Scan the adapter interrupt vector for this device. */ |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 363 | aibv = zpci_aibv[si]; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 364 | for (ai = 0;;) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 365 | ai = airq_iv_scan(aibv, ai, airq_iv_end(aibv)); |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 366 | if (ai == -1UL) |
| 367 | break; |
Heiko Carstens | 420f42e | 2013-01-02 15:18:18 +0100 | [diff] [blame] | 368 | inc_irq_stat(IRQIO_MSI); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 369 | airq_iv_lock(aibv, ai); |
| 370 | generic_handle_irq(airq_iv_get_data(aibv, ai)); |
| 371 | airq_iv_unlock(aibv, ai); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 372 | } |
| 373 | } |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 374 | } |
| 375 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 376 | 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] | 377 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 378 | struct zpci_dev *zdev = to_zpci(pdev); |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 379 | unsigned int hwirq, msi_vecs; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 380 | unsigned long aisb; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 381 | struct msi_desc *msi; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 382 | struct msi_msg msg; |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 383 | int rc, irq; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 384 | |
Alexander Gordeev | a384c89 | 2013-12-16 09:34:54 +0100 | [diff] [blame] | 385 | if (type == PCI_CAP_ID_MSI && nvec > 1) |
| 386 | return 1; |
Sebastian Ott | b19148f | 2014-10-29 19:12:04 +0100 | [diff] [blame] | 387 | msi_vecs = min_t(unsigned int, nvec, zdev->max_msi); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 388 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 389 | /* 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 394 | zdev->aisb = aisb; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 395 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 396 | /* Create adapter interrupt vector */ |
| 397 | rc = -ENOMEM; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 398 | 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] | 399 | if (!zdev->aibv) |
| 400 | goto out_si; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 401 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 402 | /* Wire up shortcut pointer */ |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 403 | zpci_aibv[aisb] = zdev->aibv; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 404 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 405 | /* Request MSI interrupts */ |
| 406 | hwirq = 0; |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 407 | for_each_pci_msi_entry(msi, pdev) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 408 | rc = -EIO; |
| 409 | irq = irq_alloc_desc(0); /* Alloc irq on node 0 */ |
Thomas Gleixner | 0a0a942 | 2014-05-07 15:44:19 +0000 | [diff] [blame] | 410 | if (irq < 0) |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 411 | goto out_msi; |
| 412 | rc = irq_set_msi_desc(irq, msi); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 413 | if (rc) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 414 | goto out_msi; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 415 | 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 Liu | 83a1891 | 2014-11-09 23:10:34 +0800 | [diff] [blame] | 420 | pci_write_msi_msg(irq, &msg); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 421 | airq_iv_set_data(zdev->aibv, hwirq, irq); |
| 422 | hwirq++; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 423 | } |
| 424 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 425 | /* 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 | |
| 432 | out_msi: |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 433 | for_each_pci_msi_entry(msi, pdev) { |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 434 | if (hwirq-- == 0) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 435 | break; |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 436 | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 442 | } |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 443 | zpci_aibv[aisb] = NULL; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 444 | airq_iv_release(zdev->aibv); |
| 445 | out_si: |
| 446 | airq_iv_free_bit(zpci_aisb_iv, aisb); |
| 447 | out: |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 448 | return rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 449 | } |
| 450 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 451 | void arch_teardown_msi_irqs(struct pci_dev *pdev) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 452 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 453 | struct zpci_dev *zdev = to_zpci(pdev); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 454 | struct msi_desc *msi; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 455 | int rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 456 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 457 | /* Disable adapter interrupts */ |
| 458 | rc = zpci_clear_airq(zdev); |
Sebastian Ott | 1f1dcbd | 2013-10-22 15:17:19 +0200 | [diff] [blame] | 459 | if (rc) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 460 | return; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 461 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 462 | /* Release MSI interrupts */ |
Jiang Liu | df516f4 | 2015-07-09 16:00:39 +0800 | [diff] [blame] | 463 | for_each_pci_msi_entry(msi, pdev) { |
Yijing Wang | 8fb878c | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 464 | if (msi->msi_attrib.is_msix) |
Thomas Gleixner | 23ed8d5 | 2014-11-23 11:55:58 +0100 | [diff] [blame] | 465 | __pci_msix_desc_mask_irq(msi, 1); |
Yijing Wang | 8fb878c | 2014-07-08 10:08:05 +0800 | [diff] [blame] | 466 | else |
Thomas Gleixner | 23ed8d5 | 2014-11-23 11:55:58 +0100 | [diff] [blame] | 467 | __pci_msi_desc_mask_irq(msi, 1, 1); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 468 | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 475 | |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 476 | zpci_aibv[zdev->aisb] = NULL; |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 477 | airq_iv_release(zdev->aibv); |
| 478 | airq_iv_free_bit(zpci_aisb_iv, zdev->aisb); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 479 | } |
| 480 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 481 | static void zpci_map_resources(struct pci_dev *pdev) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 482 | { |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 483 | 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 Schwidefsky | 5b9f208 | 2014-10-30 10:30:45 +0100 | [diff] [blame] | 490 | pdev->resource[i].start = |
| 491 | (resource_size_t __force) pci_iomap(pdev, i, 0); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 492 | pdev->resource[i].end = pdev->resource[i].start + len - 1; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 493 | } |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 494 | } |
| 495 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 496 | static void zpci_unmap_resources(struct pci_dev *pdev) |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 497 | { |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 498 | 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 Schwidefsky | 5b9f208 | 2014-10-30 10:30:45 +0100 | [diff] [blame] | 505 | pci_iounmap(pdev, (void __iomem __force *) |
| 506 | pdev->resource[i].start); |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 507 | } |
| 508 | } |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 509 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 510 | static int __init zpci_irq_init(void) |
| 511 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 512 | int rc; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 513 | |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 514 | rc = register_adapter_interrupt(&zpci_airq); |
| 515 | if (rc) |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 516 | goto out; |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 517 | /* Set summary to 1 to be called every time for the ISC. */ |
| 518 | *zpci_airq.lsi_ptr = 1; |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 519 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 520 | 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 Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 524 | |
Martin Schwidefsky | 9389339 | 2013-06-25 14:52:23 +0200 | [diff] [blame] | 525 | zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, NULL, PCI_ISC); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 526 | return 0; |
| 527 | |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 528 | out_airq: |
| 529 | unregister_adapter_interrupt(&zpci_airq); |
| 530 | out: |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 531 | return rc; |
| 532 | } |
| 533 | |
| 534 | static void zpci_irq_exit(void) |
| 535 | { |
Martin Schwidefsky | 5d0d8f4 | 2013-06-25 16:36:29 +0200 | [diff] [blame] | 536 | airq_iv_release(zpci_aisb_iv); |
Martin Schwidefsky | f4eae94 | 2013-06-24 10:30:41 +0200 | [diff] [blame] | 537 | unregister_adapter_interrupt(&zpci_airq); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 538 | } |
| 539 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 540 | static int zpci_alloc_iomap(struct zpci_dev *zdev) |
| 541 | { |
Sebastian Ott | bf19c94 | 2016-01-22 13:59:35 +0100 | [diff] [blame] | 542 | unsigned long entry; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 543 | |
| 544 | spin_lock(&zpci_iomap_lock); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 545 | entry = find_first_zero_bit(zpci_iomap_bitmap, ZPCI_IOMAP_ENTRIES); |
| 546 | if (entry == ZPCI_IOMAP_ENTRIES) { |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 547 | spin_unlock(&zpci_iomap_lock); |
| 548 | return -ENOSPC; |
| 549 | } |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 550 | set_bit(entry, zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 551 | spin_unlock(&zpci_iomap_lock); |
| 552 | return entry; |
| 553 | } |
| 554 | |
| 555 | static 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 Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 559 | clear_bit(entry, zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 560 | spin_unlock(&zpci_iomap_lock); |
| 561 | } |
| 562 | |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 563 | static 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 | |
| 584 | static 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 Ott | 9e00caa | 2016-01-22 13:58:42 +0100 | [diff] [blame] | 609 | addr = ZPCI_ADDR(entry); |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 610 | 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 | |
| 624 | static void zpci_cleanup_bus_resources(struct zpci_dev *zdev) |
| 625 | { |
| 626 | int i; |
| 627 | |
| 628 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 629 | if (!zdev->bars[i].size || !zdev->bars[i].res) |
Sebastian Ott | 7a572a3a | 2013-11-12 19:33:06 +0100 | [diff] [blame] | 630 | 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 Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 638 | int pcibios_add_device(struct pci_dev *pdev) |
| 639 | { |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 640 | struct resource *res; |
| 641 | int i; |
| 642 | |
Sebastian Ott | ef4858c | 2014-04-30 14:50:09 -0600 | [diff] [blame] | 643 | pdev->dev.groups = zpci_attr_groups; |
Christian Borntraeger | e82becfc | 2016-02-02 21:46:34 -0800 | [diff] [blame] | 644 | pdev->dev.archdata.dma_ops = &s390_pci_dma_ops; |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 645 | zpci_map_resources(pdev); |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 646 | |
| 647 | for (i = 0; i < PCI_BAR_COUNT; i++) { |
| 648 | res = &pdev->resource[i]; |
| 649 | if (res->parent || !res->flags) |
| 650 | continue; |
| 651 | pci_claim_resource(pdev, i); |
| 652 | } |
| 653 | |
| 654 | return 0; |
| 655 | } |
| 656 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 657 | void pcibios_release_device(struct pci_dev *pdev) |
| 658 | { |
| 659 | zpci_unmap_resources(pdev); |
| 660 | } |
| 661 | |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 662 | int pcibios_enable_device(struct pci_dev *pdev, int mask) |
| 663 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 664 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 665 | |
Sebastian Ott | 9a99649 | 2016-01-29 15:13:30 +0100 | [diff] [blame] | 666 | zpci_debug_init_device(zdev, dev_name(&pdev->dev)); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 667 | zpci_fmb_enable_device(zdev); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 668 | |
Bjorn Helgaas | d753323 | 2014-02-26 15:30:24 -0700 | [diff] [blame] | 669 | return pci_enable_resources(pdev, mask); |
Sebastian Ott | af0a8a8 | 2013-04-16 14:13:21 +0200 | [diff] [blame] | 670 | } |
| 671 | |
Sebastian Ott | cb80918 | 2013-08-29 19:34:37 +0200 | [diff] [blame] | 672 | void pcibios_disable_device(struct pci_dev *pdev) |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 673 | { |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 674 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 675 | |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 676 | zpci_fmb_disable_device(zdev); |
| 677 | zpci_debug_exit_device(zdev); |
Sebastian Ott | 944239c | 2013-06-05 16:06:16 +0200 | [diff] [blame] | 678 | } |
| 679 | |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 680 | #ifdef CONFIG_HIBERNATE_CALLBACKS |
| 681 | static int zpci_restore(struct device *dev) |
| 682 | { |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 683 | struct pci_dev *pdev = to_pci_dev(dev); |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 684 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 685 | int ret = 0; |
| 686 | |
| 687 | if (zdev->state != ZPCI_FN_STATE_ONLINE) |
| 688 | goto out; |
| 689 | |
| 690 | ret = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES); |
| 691 | if (ret) |
| 692 | goto out; |
| 693 | |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 694 | zpci_map_resources(pdev); |
Gerald Schaefer | 69eea95 | 2015-11-16 14:35:48 +0100 | [diff] [blame] | 695 | zpci_register_ioat(zdev, 0, zdev->start_dma, zdev->end_dma, |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 696 | (u64) zdev->dma_table); |
| 697 | |
| 698 | out: |
| 699 | return ret; |
| 700 | } |
| 701 | |
| 702 | static int zpci_freeze(struct device *dev) |
| 703 | { |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 704 | struct pci_dev *pdev = to_pci_dev(dev); |
Sebastian Ott | 198a527 | 2015-06-23 14:06:35 +0200 | [diff] [blame] | 705 | struct zpci_dev *zdev = to_zpci(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 706 | |
| 707 | if (zdev->state != ZPCI_FN_STATE_ONLINE) |
| 708 | return 0; |
| 709 | |
| 710 | zpci_unregister_ioat(zdev, 0); |
Sebastian Ott | 1803ba2 | 2015-02-27 16:43:21 +0100 | [diff] [blame] | 711 | zpci_unmap_resources(pdev); |
Sebastian Ott | 69db3b5 | 2013-09-25 12:27:43 +0200 | [diff] [blame] | 712 | return clp_disable_fh(zdev); |
| 713 | } |
| 714 | |
| 715 | struct dev_pm_ops pcibios_pm_ops = { |
| 716 | .thaw_noirq = zpci_restore, |
| 717 | .freeze_noirq = zpci_freeze, |
| 718 | .restore_noirq = zpci_restore, |
| 719 | .poweroff_noirq = zpci_freeze, |
| 720 | }; |
| 721 | #endif /* CONFIG_HIBERNATE_CALLBACKS */ |
| 722 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 723 | static int zpci_alloc_domain(struct zpci_dev *zdev) |
| 724 | { |
| 725 | spin_lock(&zpci_domain_lock); |
| 726 | zdev->domain = find_first_zero_bit(zpci_domain, ZPCI_NR_DEVICES); |
| 727 | if (zdev->domain == ZPCI_NR_DEVICES) { |
| 728 | spin_unlock(&zpci_domain_lock); |
| 729 | return -ENOSPC; |
| 730 | } |
| 731 | set_bit(zdev->domain, zpci_domain); |
| 732 | spin_unlock(&zpci_domain_lock); |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | static void zpci_free_domain(struct zpci_dev *zdev) |
| 737 | { |
| 738 | spin_lock(&zpci_domain_lock); |
| 739 | clear_bit(zdev->domain, zpci_domain); |
| 740 | spin_unlock(&zpci_domain_lock); |
| 741 | } |
| 742 | |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 743 | void pcibios_remove_bus(struct pci_bus *bus) |
| 744 | { |
| 745 | struct zpci_dev *zdev = get_zdev_by_bus(bus); |
| 746 | |
| 747 | zpci_exit_slot(zdev); |
| 748 | zpci_cleanup_bus_resources(zdev); |
| 749 | zpci_free_domain(zdev); |
| 750 | |
| 751 | spin_lock(&zpci_list_lock); |
| 752 | list_del(&zdev->entry); |
| 753 | spin_unlock(&zpci_list_lock); |
| 754 | |
| 755 | kfree(zdev); |
| 756 | } |
| 757 | |
| 758 | static int zpci_scan_bus(struct zpci_dev *zdev) |
| 759 | { |
| 760 | LIST_HEAD(resources); |
| 761 | int ret; |
| 762 | |
| 763 | ret = zpci_setup_bus_resources(zdev, &resources); |
| 764 | if (ret) |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 765 | goto error; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 766 | |
| 767 | zdev->bus = pci_scan_root_bus(NULL, ZPCI_BUS_NR, &pci_root_ops, |
| 768 | zdev, &resources); |
| 769 | if (!zdev->bus) { |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 770 | ret = -EIO; |
| 771 | goto error; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 772 | } |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 773 | zdev->bus->max_bus_speed = zdev->max_bus_speed; |
Yijing Wang | b97ea28 | 2015-03-16 11:18:56 +0800 | [diff] [blame] | 774 | pci_bus_add_devices(zdev->bus); |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 775 | return 0; |
Sebastian Ott | 2b1df72 | 2015-07-28 19:10:45 +0200 | [diff] [blame] | 776 | |
| 777 | error: |
| 778 | zpci_cleanup_bus_resources(zdev); |
| 779 | pci_free_resource_list(&resources); |
| 780 | return ret; |
Sebastian Ott | 7d59432 | 2013-11-12 19:35:01 +0100 | [diff] [blame] | 781 | } |
| 782 | |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 783 | int zpci_enable_device(struct zpci_dev *zdev) |
| 784 | { |
| 785 | int rc; |
| 786 | |
| 787 | rc = clp_enable_fh(zdev, ZPCI_NR_DMA_SPACES); |
| 788 | if (rc) |
| 789 | goto out; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 790 | |
| 791 | rc = zpci_dma_init_device(zdev); |
| 792 | if (rc) |
| 793 | goto out_dma; |
Sebastian Ott | 0ff70ec | 2013-08-29 19:35:19 +0200 | [diff] [blame] | 794 | |
| 795 | zdev->state = ZPCI_FN_STATE_ONLINE; |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 796 | return 0; |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 797 | |
| 798 | out_dma: |
| 799 | clp_disable_fh(zdev); |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 800 | out: |
| 801 | return rc; |
| 802 | } |
| 803 | EXPORT_SYMBOL_GPL(zpci_enable_device); |
| 804 | |
Sebastian Ott | cb65a66 | 2013-04-16 14:12:17 +0200 | [diff] [blame] | 805 | int zpci_disable_device(struct zpci_dev *zdev) |
| 806 | { |
| 807 | zpci_dma_exit_device(zdev); |
| 808 | return clp_disable_fh(zdev); |
| 809 | } |
| 810 | EXPORT_SYMBOL_GPL(zpci_disable_device); |
| 811 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 812 | int zpci_create_device(struct zpci_dev *zdev) |
| 813 | { |
| 814 | int rc; |
| 815 | |
| 816 | rc = zpci_alloc_domain(zdev); |
| 817 | if (rc) |
| 818 | goto out; |
| 819 | |
Sebastian Ott | 80ed156 | 2015-04-10 14:34:33 +0200 | [diff] [blame] | 820 | mutex_init(&zdev->lock); |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 821 | if (zdev->state == ZPCI_FN_STATE_CONFIGURED) { |
| 822 | rc = zpci_enable_device(zdev); |
| 823 | if (rc) |
| 824 | goto out_free; |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 825 | } |
| 826 | rc = zpci_scan_bus(zdev); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 827 | if (rc) |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 828 | goto out_disable; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 829 | |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 830 | spin_lock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 831 | list_add_tail(&zdev->entry, &zpci_list); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 832 | spin_unlock(&zpci_list_lock); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 833 | |
Sebastian Ott | 67f43f3 | 2013-08-29 19:33:16 +0200 | [diff] [blame] | 834 | zpci_init_slot(zdev); |
| 835 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 836 | return 0; |
| 837 | |
Sebastian Ott | 1c21351 | 2013-04-25 14:49:48 +0200 | [diff] [blame] | 838 | out_disable: |
| 839 | if (zdev->state == ZPCI_FN_STATE_ONLINE) |
| 840 | zpci_disable_device(zdev); |
| 841 | out_free: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 842 | zpci_free_domain(zdev); |
| 843 | out: |
| 844 | return rc; |
| 845 | } |
| 846 | |
| 847 | void zpci_stop_device(struct zpci_dev *zdev) |
| 848 | { |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 849 | zpci_dma_exit_device(zdev); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 850 | /* |
| 851 | * Note: SCLP disables fh via set-pci-fn so don't |
| 852 | * do that here. |
| 853 | */ |
| 854 | } |
| 855 | EXPORT_SYMBOL_GPL(zpci_stop_device); |
| 856 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 857 | static inline int barsize(u8 size) |
| 858 | { |
| 859 | return (size) ? (1 << size) >> 10 : 0; |
| 860 | } |
| 861 | |
| 862 | static int zpci_mem_init(void) |
| 863 | { |
Sebastian Ott | 80c544de | 2016-03-14 15:47:23 +0100 | [diff] [blame] | 864 | BUILD_BUG_ON(!is_power_of_2(__alignof__(struct zpci_fmb)) || |
| 865 | __alignof__(struct zpci_fmb) < sizeof(struct zpci_fmb)); |
| 866 | |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 867 | zdev_fmb_cache = kmem_cache_create("PCI_FMB_cache", sizeof(struct zpci_fmb), |
Sebastian Ott | 80c544de | 2016-03-14 15:47:23 +0100 | [diff] [blame] | 868 | __alignof__(struct zpci_fmb), 0, NULL); |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 869 | if (!zdev_fmb_cache) |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 870 | goto error_fmb; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 871 | |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 872 | zpci_iomap_start = kcalloc(ZPCI_IOMAP_ENTRIES, |
| 873 | sizeof(*zpci_iomap_start), GFP_KERNEL); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 874 | if (!zpci_iomap_start) |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 875 | goto error_iomap; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 876 | |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 877 | zpci_iomap_bitmap = kcalloc(BITS_TO_LONGS(ZPCI_IOMAP_ENTRIES), |
| 878 | sizeof(*zpci_iomap_bitmap), GFP_KERNEL); |
| 879 | if (!zpci_iomap_bitmap) |
| 880 | goto error_iomap_bitmap; |
| 881 | |
| 882 | return 0; |
| 883 | error_iomap_bitmap: |
| 884 | kfree(zpci_iomap_start); |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 885 | error_iomap: |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 886 | kmem_cache_destroy(zdev_fmb_cache); |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 887 | error_fmb: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 888 | return -ENOMEM; |
| 889 | } |
| 890 | |
| 891 | static void zpci_mem_exit(void) |
| 892 | { |
Sebastian Ott | c506fff3 | 2016-01-22 14:01:44 +0100 | [diff] [blame] | 893 | kfree(zpci_iomap_bitmap); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 894 | kfree(zpci_iomap_start); |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 895 | kmem_cache_destroy(zdev_fmb_cache); |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 896 | } |
| 897 | |
Sebastian Ott | 257608f | 2013-12-12 17:55:22 +0100 | [diff] [blame] | 898 | static unsigned int s390_pci_probe = 1; |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 899 | static unsigned int s390_pci_initialized; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 900 | |
| 901 | char * __init pcibios_setup(char *str) |
| 902 | { |
Sebastian Ott | 257608f | 2013-12-12 17:55:22 +0100 | [diff] [blame] | 903 | if (!strcmp(str, "off")) { |
| 904 | s390_pci_probe = 0; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 905 | return NULL; |
| 906 | } |
| 907 | return str; |
| 908 | } |
| 909 | |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 910 | bool zpci_is_enabled(void) |
| 911 | { |
| 912 | return s390_pci_initialized; |
| 913 | } |
| 914 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 915 | static int __init pci_base_init(void) |
| 916 | { |
| 917 | int rc; |
| 918 | |
Heiko Carstens | 1e5635d | 2013-01-30 15:52:16 +0100 | [diff] [blame] | 919 | if (!s390_pci_probe) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 920 | return 0; |
| 921 | |
Heiko Carstens | 86cd741 | 2015-02-14 11:23:21 +0100 | [diff] [blame] | 922 | if (!test_facility(69) || !test_facility(71) || !test_facility(72)) |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 923 | return 0; |
| 924 | |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 925 | rc = zpci_debug_init(); |
| 926 | if (rc) |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 927 | goto out; |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 928 | |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 929 | rc = zpci_mem_init(); |
| 930 | if (rc) |
| 931 | goto out_mem; |
| 932 | |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 933 | rc = zpci_irq_init(); |
| 934 | if (rc) |
| 935 | goto out_irq; |
| 936 | |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 937 | rc = zpci_dma_init(); |
| 938 | if (rc) |
| 939 | goto out_dma; |
| 940 | |
Sebastian Ott | 1d57896 | 2013-08-29 19:37:28 +0200 | [diff] [blame] | 941 | rc = clp_scan_pci_devices(); |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 942 | if (rc) |
| 943 | goto out_find; |
| 944 | |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 945 | s390_pci_initialized = 1; |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 946 | return 0; |
| 947 | |
Jan Glauber | a755a45 | 2012-11-29 12:55:21 +0100 | [diff] [blame] | 948 | out_find: |
Jan Glauber | 828b35f | 2012-11-29 14:33:30 +0100 | [diff] [blame] | 949 | zpci_dma_exit(); |
| 950 | out_dma: |
Jan Glauber | 9a4da8a | 2012-11-29 13:05:05 +0100 | [diff] [blame] | 951 | zpci_irq_exit(); |
| 952 | out_irq: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 953 | zpci_mem_exit(); |
| 954 | out_mem: |
Jan Glauber | d0b0885 | 2012-12-11 14:53:35 +0100 | [diff] [blame] | 955 | zpci_debug_exit(); |
Martin Schwidefsky | 1f44a22 | 2013-06-27 09:01:09 +0200 | [diff] [blame] | 956 | out: |
Jan Glauber | cd24834 | 2012-11-29 12:50:30 +0100 | [diff] [blame] | 957 | return rc; |
| 958 | } |
Sebastian Ott | 67f43f3 | 2013-08-29 19:33:16 +0200 | [diff] [blame] | 959 | subsys_initcall_sync(pci_base_init); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 960 | |
| 961 | void zpci_rescan(void) |
| 962 | { |
Sebastian Ott | aa3b7c2 | 2013-12-12 17:48:32 +0100 | [diff] [blame] | 963 | if (zpci_is_enabled()) |
| 964 | clp_rescan_pci_devices_simple(); |
Sebastian Ott | 57b5918 | 2013-08-29 19:40:01 +0200 | [diff] [blame] | 965 | } |