Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 2 | /* |
| 3 | * RapidIO enumeration and discovery support |
| 4 | * |
| 5 | * Copyright 2005 MontaVista Software, Inc. |
| 6 | * Matt Porter <mporter@kernel.crashing.org> |
| 7 | * |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 8 | * Copyright 2009 Integrated Device Technology, Inc. |
| 9 | * Alex Bounine <alexandre.bounine@idt.com> |
| 10 | * - Added Port-Write/Error Management initialization and handling |
| 11 | * |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 12 | * Copyright 2009 Sysgo AG |
| 13 | * Thomas Moll <thomas.moll@sysgo.com> |
| 14 | * - Added Input- Output- enable functionality, to allow full communication |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 15 | */ |
| 16 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/kernel.h> |
| 19 | |
| 20 | #include <linux/delay.h> |
Matt Porter | fa78cc5 | 2005-11-07 01:00:18 -0800 | [diff] [blame] | 21 | #include <linux/dma-mapping.h> |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/rio.h> |
| 24 | #include <linux/rio_drv.h> |
| 25 | #include <linux/rio_ids.h> |
| 26 | #include <linux/rio_regs.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <linux/timer.h> |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 30 | #include <linux/sched.h> |
Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame] | 31 | #include <linux/jiffies.h> |
| 32 | #include <linux/slab.h> |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 33 | |
| 34 | #include "rio.h" |
| 35 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 36 | static void rio_init_em(struct rio_dev *rdev); |
| 37 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 38 | struct rio_id_table { |
| 39 | u16 start; /* logical minimal id */ |
| 40 | u32 max; /* max number of IDs in table */ |
| 41 | spinlock_t lock; |
| 42 | unsigned long table[0]; |
| 43 | }; |
| 44 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 45 | static int next_destid = 0; |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 46 | static int next_comptag = 1; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 47 | |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 48 | /** |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 49 | * rio_destid_alloc - Allocate next available destID for given network |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 50 | * @net: RIO network |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 51 | * |
| 52 | * Returns next available device destination ID for the specified RIO network. |
| 53 | * Marks allocated ID as one in use. |
| 54 | * Returns RIO_INVALID_DESTID if new destID is not available. |
| 55 | */ |
| 56 | static u16 rio_destid_alloc(struct rio_net *net) |
| 57 | { |
| 58 | int destid; |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 59 | struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 60 | |
| 61 | spin_lock(&idtab->lock); |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 62 | destid = find_first_zero_bit(idtab->table, idtab->max); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 63 | |
| 64 | if (destid < idtab->max) { |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 65 | set_bit(destid, idtab->table); |
| 66 | destid += idtab->start; |
| 67 | } else |
| 68 | destid = RIO_INVALID_DESTID; |
| 69 | |
| 70 | spin_unlock(&idtab->lock); |
| 71 | return (u16)destid; |
| 72 | } |
| 73 | |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 74 | /** |
Vasyl Gomonovych | b94bb1f | 2018-04-10 16:35:06 -0700 | [diff] [blame] | 75 | * rio_destid_reserve - Reserve the specified destID |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 76 | * @net: RIO network |
| 77 | * @destid: destID to reserve |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 78 | * |
| 79 | * Tries to reserve the specified destID. |
Masanari Iida | 7667928 | 2015-05-08 00:02:27 +0900 | [diff] [blame] | 80 | * Returns 0 if successful. |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 81 | */ |
| 82 | static int rio_destid_reserve(struct rio_net *net, u16 destid) |
| 83 | { |
| 84 | int oldbit; |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 85 | struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 86 | |
| 87 | destid -= idtab->start; |
| 88 | spin_lock(&idtab->lock); |
| 89 | oldbit = test_and_set_bit(destid, idtab->table); |
| 90 | spin_unlock(&idtab->lock); |
| 91 | return oldbit; |
| 92 | } |
| 93 | |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 94 | /** |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 95 | * rio_destid_free - free a previously allocated destID |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 96 | * @net: RIO network |
| 97 | * @destid: destID to free |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 98 | * |
| 99 | * Makes the specified destID available for use. |
| 100 | */ |
| 101 | static void rio_destid_free(struct rio_net *net, u16 destid) |
| 102 | { |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 103 | struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 104 | |
| 105 | destid -= idtab->start; |
| 106 | spin_lock(&idtab->lock); |
| 107 | clear_bit(destid, idtab->table); |
| 108 | spin_unlock(&idtab->lock); |
| 109 | } |
| 110 | |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 111 | /** |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 112 | * rio_destid_first - return first destID in use |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 113 | * @net: RIO network |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 114 | */ |
| 115 | static u16 rio_destid_first(struct rio_net *net) |
| 116 | { |
| 117 | int destid; |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 118 | struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 119 | |
| 120 | spin_lock(&idtab->lock); |
| 121 | destid = find_first_bit(idtab->table, idtab->max); |
| 122 | if (destid >= idtab->max) |
| 123 | destid = RIO_INVALID_DESTID; |
| 124 | else |
| 125 | destid += idtab->start; |
| 126 | spin_unlock(&idtab->lock); |
| 127 | return (u16)destid; |
| 128 | } |
| 129 | |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 130 | /** |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 131 | * rio_destid_next - return next destID in use |
Alexandre Bounine | 4ed134b | 2012-10-10 15:54:01 -0700 | [diff] [blame] | 132 | * @net: RIO network |
| 133 | * @from: destination ID from which search shall continue |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 134 | */ |
| 135 | static u16 rio_destid_next(struct rio_net *net, u16 from) |
| 136 | { |
| 137 | int destid; |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 138 | struct rio_id_table *idtab = (struct rio_id_table *)net->enum_data; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 139 | |
| 140 | spin_lock(&idtab->lock); |
| 141 | destid = find_next_bit(idtab->table, idtab->max, from); |
| 142 | if (destid >= idtab->max) |
| 143 | destid = RIO_INVALID_DESTID; |
| 144 | else |
| 145 | destid += idtab->start; |
| 146 | spin_unlock(&idtab->lock); |
| 147 | return (u16)destid; |
| 148 | } |
| 149 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 150 | /** |
| 151 | * rio_get_device_id - Get the base/extended device id for a device |
| 152 | * @port: RIO master port |
| 153 | * @destid: Destination ID of device |
| 154 | * @hopcount: Hopcount to device |
| 155 | * |
| 156 | * Reads the base/extended device id from a device. Returns the |
| 157 | * 8/16-bit device ID. |
| 158 | */ |
| 159 | static u16 rio_get_device_id(struct rio_mport *port, u16 destid, u8 hopcount) |
| 160 | { |
| 161 | u32 result; |
| 162 | |
| 163 | rio_mport_read_config_32(port, destid, hopcount, RIO_DID_CSR, &result); |
| 164 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 165 | return RIO_GET_DID(port->sys_size, result); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 166 | } |
| 167 | |
| 168 | /** |
| 169 | * rio_set_device_id - Set the base/extended device id for a device |
| 170 | * @port: RIO master port |
| 171 | * @destid: Destination ID of device |
| 172 | * @hopcount: Hopcount to device |
| 173 | * @did: Device ID value to be written |
| 174 | * |
| 175 | * Writes the base/extended device id from a device. |
| 176 | */ |
Matt Porter | fa78cc5 | 2005-11-07 01:00:18 -0800 | [diff] [blame] | 177 | static void rio_set_device_id(struct rio_mport *port, u16 destid, u8 hopcount, u16 did) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 178 | { |
| 179 | rio_mport_write_config_32(port, destid, hopcount, RIO_DID_CSR, |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 180 | RIO_SET_DID(port->sys_size, did)); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 184 | * rio_clear_locks- Release all host locks and signal enumeration complete |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 185 | * @net: RIO network to run on |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 186 | * |
| 187 | * Marks the component tag CSR on each device with the enumeration |
| 188 | * complete flag. When complete, it then release the host locks on |
| 189 | * each device. Returns 0 on success or %-EINVAL on failure. |
| 190 | */ |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 191 | static int rio_clear_locks(struct rio_net *net) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 192 | { |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 193 | struct rio_mport *port = net->hport; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 194 | struct rio_dev *rdev; |
| 195 | u32 result; |
| 196 | int ret = 0; |
| 197 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 198 | /* Release host device id locks */ |
| 199 | rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, |
| 200 | port->host_deviceid); |
| 201 | rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); |
| 202 | if ((result & 0xffff) != 0xffff) { |
| 203 | printk(KERN_INFO |
| 204 | "RIO: badness when releasing host lock on master port, result %8.8x\n", |
| 205 | result); |
| 206 | ret = -EINVAL; |
| 207 | } |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 208 | list_for_each_entry(rdev, &net->devices, net_list) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 209 | rio_write_config_32(rdev, RIO_HOST_DID_LOCK_CSR, |
| 210 | port->host_deviceid); |
| 211 | rio_read_config_32(rdev, RIO_HOST_DID_LOCK_CSR, &result); |
| 212 | if ((result & 0xffff) != 0xffff) { |
| 213 | printk(KERN_INFO |
| 214 | "RIO: badness when releasing host lock on vid %4.4x did %4.4x\n", |
| 215 | rdev->vid, rdev->did); |
| 216 | ret = -EINVAL; |
| 217 | } |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 218 | |
| 219 | /* Mark device as discovered and enable master */ |
| 220 | rio_read_config_32(rdev, |
| 221 | rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, |
| 222 | &result); |
| 223 | result |= RIO_PORT_GEN_DISCOVERED | RIO_PORT_GEN_MASTER; |
| 224 | rio_write_config_32(rdev, |
| 225 | rdev->phys_efptr + RIO_PORT_GEN_CTL_CSR, |
| 226 | result); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | return ret; |
| 230 | } |
| 231 | |
| 232 | /** |
| 233 | * rio_enum_host- Set host lock and initialize host destination ID |
| 234 | * @port: Master port to issue transaction |
| 235 | * |
| 236 | * Sets the local host master port lock and destination ID register |
| 237 | * with the host device ID value. The host device ID value is provided |
| 238 | * by the platform. Returns %0 on success or %-1 on failure. |
| 239 | */ |
| 240 | static int rio_enum_host(struct rio_mport *port) |
| 241 | { |
| 242 | u32 result; |
| 243 | |
| 244 | /* Set master port host device id lock */ |
| 245 | rio_local_write_config_32(port, RIO_HOST_DID_LOCK_CSR, |
| 246 | port->host_deviceid); |
| 247 | |
| 248 | rio_local_read_config_32(port, RIO_HOST_DID_LOCK_CSR, &result); |
| 249 | if ((result & 0xffff) != port->host_deviceid) |
| 250 | return -1; |
| 251 | |
| 252 | /* Set master port destid and init destid ctr */ |
| 253 | rio_local_set_device_id(port, port->host_deviceid); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 254 | return 0; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * rio_device_has_destid- Test if a device contains a destination ID register |
| 259 | * @port: Master port to issue transaction |
| 260 | * @src_ops: RIO device source operations |
| 261 | * @dst_ops: RIO device destination operations |
| 262 | * |
| 263 | * Checks the provided @src_ops and @dst_ops for the necessary transaction |
| 264 | * capabilities that indicate whether or not a device will implement a |
| 265 | * destination ID register. Returns 1 if true or 0 if false. |
| 266 | */ |
| 267 | static int rio_device_has_destid(struct rio_mport *port, int src_ops, |
| 268 | int dst_ops) |
| 269 | { |
Matt Porter | fa78cc5 | 2005-11-07 01:00:18 -0800 | [diff] [blame] | 270 | u32 mask = RIO_OPS_READ | RIO_OPS_WRITE | RIO_OPS_ATOMIC_TST_SWP | RIO_OPS_ATOMIC_INC | RIO_OPS_ATOMIC_DEC | RIO_OPS_ATOMIC_SET | RIO_OPS_ATOMIC_CLR; |
| 271 | |
| 272 | return !!((src_ops | dst_ops) & mask); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | /** |
| 276 | * rio_release_dev- Frees a RIO device struct |
| 277 | * @dev: LDM device associated with a RIO device struct |
| 278 | * |
| 279 | * Gets the RIO device struct associated a RIO device struct. |
| 280 | * The RIO device struct is freed. |
| 281 | */ |
| 282 | static void rio_release_dev(struct device *dev) |
| 283 | { |
| 284 | struct rio_dev *rdev; |
| 285 | |
| 286 | rdev = to_rio_dev(dev); |
| 287 | kfree(rdev); |
| 288 | } |
| 289 | |
| 290 | /** |
| 291 | * rio_is_switch- Tests if a RIO device has switch capabilities |
| 292 | * @rdev: RIO device |
| 293 | * |
| 294 | * Gets the RIO device Processing Element Features register |
| 295 | * contents and tests for switch capabilities. Returns 1 if |
| 296 | * the device is a switch or 0 if it is not a switch. |
| 297 | * The RIO device struct is freed. |
| 298 | */ |
| 299 | static int rio_is_switch(struct rio_dev *rdev) |
| 300 | { |
| 301 | if (rdev->pef & RIO_PEF_SWITCH) |
| 302 | return 1; |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 307 | * rio_setup_device- Allocates and sets up a RIO device |
| 308 | * @net: RIO network |
| 309 | * @port: Master port to send transactions |
| 310 | * @destid: Current destination ID |
| 311 | * @hopcount: Current hopcount |
| 312 | * @do_enum: Enumeration/Discovery mode flag |
| 313 | * |
| 314 | * Allocates a RIO device and configures fields based on configuration |
| 315 | * space contents. If device has a destination ID register, a destination |
| 316 | * ID is either assigned in enumeration mode or read from configuration |
| 317 | * space in discovery mode. If the device has switch capabilities, then |
| 318 | * a switch is allocated and configured appropriately. Returns a pointer |
| 319 | * to a RIO device on success or NULL on failure. |
| 320 | * |
| 321 | */ |
Bill Pemberton | 305c891e | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 322 | static struct rio_dev *rio_setup_device(struct rio_net *net, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 323 | struct rio_mport *port, u16 destid, |
| 324 | u8 hopcount, int do_enum) |
| 325 | { |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 326 | int ret = 0; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 327 | struct rio_dev *rdev; |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 328 | struct rio_switch *rswitch = NULL; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 329 | int result, rdid; |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 330 | size_t size; |
| 331 | u32 swpinfo = 0; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 332 | |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 333 | size = sizeof(struct rio_dev); |
| 334 | if (rio_mport_read_config_32(port, destid, hopcount, |
| 335 | RIO_PEF_CAR, &result)) |
| 336 | return NULL; |
| 337 | |
| 338 | if (result & (RIO_PEF_SWITCH | RIO_PEF_MULTIPORT)) { |
| 339 | rio_mport_read_config_32(port, destid, hopcount, |
| 340 | RIO_SWP_INFO_CAR, &swpinfo); |
| 341 | if (result & RIO_PEF_SWITCH) { |
| 342 | size += (RIO_GET_TOTAL_PORTS(swpinfo) * |
| 343 | sizeof(rswitch->nextdev[0])) + sizeof(*rswitch); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | rdev = kzalloc(size, GFP_KERNEL); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 348 | if (!rdev) |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 349 | return NULL; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 350 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 351 | rdev->net = net; |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 352 | rdev->pef = result; |
| 353 | rdev->swpinfo = swpinfo; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 354 | rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_ID_CAR, |
| 355 | &result); |
| 356 | rdev->did = result >> 16; |
| 357 | rdev->vid = result & 0xffff; |
| 358 | rio_mport_read_config_32(port, destid, hopcount, RIO_DEV_INFO_CAR, |
| 359 | &rdev->device_rev); |
| 360 | rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_ID_CAR, |
| 361 | &result); |
| 362 | rdev->asm_did = result >> 16; |
| 363 | rdev->asm_vid = result & 0xffff; |
| 364 | rio_mport_read_config_32(port, destid, hopcount, RIO_ASM_INFO_CAR, |
| 365 | &result); |
| 366 | rdev->asm_rev = result >> 16; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 367 | if (rdev->pef & RIO_PEF_EXT_FEATURES) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 368 | rdev->efptr = result & 0xffff; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 369 | rdev->phys_efptr = rio_mport_get_physefb(port, 0, destid, |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 370 | hopcount, &rdev->phys_rmap); |
| 371 | pr_debug("RIO: %s Register Map %d device\n", |
| 372 | __func__, rdev->phys_rmap); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 373 | |
| 374 | rdev->em_efptr = rio_mport_get_feature(port, 0, destid, |
| 375 | hopcount, RIO_EFB_ERR_MGMNT); |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 376 | if (!rdev->em_efptr) |
| 377 | rdev->em_efptr = rio_mport_get_feature(port, 0, destid, |
| 378 | hopcount, RIO_EFB_ERR_MGMNT_HS); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 379 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 380 | |
| 381 | rio_mport_read_config_32(port, destid, hopcount, RIO_SRC_OPS_CAR, |
| 382 | &rdev->src_ops); |
| 383 | rio_mport_read_config_32(port, destid, hopcount, RIO_DST_OPS_CAR, |
| 384 | &rdev->dst_ops); |
| 385 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 386 | if (do_enum) { |
| 387 | /* Assign component tag to device */ |
| 388 | if (next_comptag >= 0x10000) { |
| 389 | pr_err("RIO: Component Tag Counter Overflow\n"); |
| 390 | goto cleanup; |
| 391 | } |
| 392 | rio_mport_write_config_32(port, destid, hopcount, |
| 393 | RIO_COMPONENT_TAG_CSR, next_comptag); |
| 394 | rdev->comp_tag = next_comptag++; |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 395 | rdev->do_enum = true; |
Alexandre Bounine | 558bda6 | 2011-01-12 17:00:42 -0800 | [diff] [blame] | 396 | } else { |
| 397 | rio_mport_read_config_32(port, destid, hopcount, |
| 398 | RIO_COMPONENT_TAG_CSR, |
| 399 | &rdev->comp_tag); |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 400 | } |
| 401 | |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 402 | if (rio_device_has_destid(port, rdev->src_ops, rdev->dst_ops)) { |
| 403 | if (do_enum) { |
| 404 | rio_set_device_id(port, destid, hopcount, next_destid); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 405 | rdev->destid = next_destid; |
| 406 | next_destid = rio_destid_alloc(net); |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 407 | } else |
| 408 | rdev->destid = rio_get_device_id(port, destid, hopcount); |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 409 | |
| 410 | rdev->hopcount = 0xff; |
| 411 | } else { |
| 412 | /* Switch device has an associated destID which |
| 413 | * will be adjusted later |
| 414 | */ |
| 415 | rdev->destid = destid; |
| 416 | rdev->hopcount = hopcount; |
| 417 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 418 | |
| 419 | /* If a PE has both switch and other functions, show it as a switch */ |
| 420 | if (rio_is_switch(rdev)) { |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 421 | rswitch = rdev->rswitch; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 422 | rswitch->port_ok = 0; |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 423 | spin_lock_init(&rswitch->lock); |
Kees Cook | 6396bb2 | 2018-06-12 14:03:40 -0700 | [diff] [blame] | 424 | rswitch->route_table = |
| 425 | kzalloc(RIO_MAX_ROUTE_ENTRIES(port->sys_size), |
| 426 | GFP_KERNEL); |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 427 | if (!rswitch->route_table) |
| 428 | goto cleanup; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 429 | /* Initialize switch route table */ |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 430 | for (rdid = 0; rdid < RIO_MAX_ROUTE_ENTRIES(port->sys_size); |
| 431 | rdid++) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 432 | rswitch->route_table[rdid] = RIO_INVALID_ROUTE; |
Kay Sievers | b53c7583 | 2008-12-04 10:01:52 -0800 | [diff] [blame] | 433 | dev_set_name(&rdev->dev, "%02x:s:%04x", rdev->net->id, |
Alexandre Bounine | 6ca40c2 | 2013-07-03 15:09:01 -0700 | [diff] [blame] | 434 | rdev->comp_tag & RIO_CTAG_UDEVID); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 435 | |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 436 | if (do_enum) |
| 437 | rio_route_clr_table(rdev, RIO_GLOBAL_TABLE, 0); |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 438 | } else { |
| 439 | if (do_enum) |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 440 | /*Enable Input Output Port (transmitter receiver)*/ |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 441 | rio_enable_rx_tx_port(port, 0, destid, hopcount, 0); |
| 442 | |
Kay Sievers | b53c7583 | 2008-12-04 10:01:52 -0800 | [diff] [blame] | 443 | dev_set_name(&rdev->dev, "%02x:e:%04x", rdev->net->id, |
Alexandre Bounine | 6ca40c2 | 2013-07-03 15:09:01 -0700 | [diff] [blame] | 444 | rdev->comp_tag & RIO_CTAG_UDEVID); |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 445 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 446 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 447 | rdev->dev.parent = &net->dev; |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 448 | rio_attach_device(rdev); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 449 | rdev->dev.release = rio_release_dev; |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 450 | rdev->dma_mask = DMA_BIT_MASK(32); |
Matt Porter | fa78cc5 | 2005-11-07 01:00:18 -0800 | [diff] [blame] | 451 | rdev->dev.dma_mask = &rdev->dma_mask; |
Yang Hongyang | 284901a | 2009-04-06 19:01:15 -0700 | [diff] [blame] | 452 | rdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 453 | |
Alexandre Bounine | 284fb68 | 2011-08-25 15:59:13 -0700 | [diff] [blame] | 454 | if (rdev->dst_ops & RIO_DST_OPS_DOORBELL) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 455 | rio_init_dbell_res(&rdev->riores[RIO_DOORBELL_RESOURCE], |
| 456 | 0, 0xffff); |
| 457 | |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 458 | ret = rio_add_device(rdev); |
| 459 | if (ret) |
| 460 | goto cleanup; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 461 | |
Alexandre Bounine | b74ec56 | 2016-03-22 14:26:14 -0700 | [diff] [blame] | 462 | rio_dev_get(rdev); |
| 463 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 464 | return rdev; |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 465 | |
| 466 | cleanup: |
Alexandre Bounine | 166c050 | 2011-11-02 13:39:11 -0700 | [diff] [blame] | 467 | if (rswitch) |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 468 | kfree(rswitch->route_table); |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 469 | |
Yang Li | 5f28c52 | 2009-05-11 22:36:02 +0000 | [diff] [blame] | 470 | kfree(rdev); |
| 471 | return NULL; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | /** |
| 475 | * rio_sport_is_active- Tests if a switch port has an active connection. |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 476 | * @rdev: RapidIO device object |
| 477 | * @sp: Switch port number |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 478 | * |
| 479 | * Reads the port error status CSR for a particular switch port to |
| 480 | * determine if the port has an active link. Returns |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 481 | * %RIO_PORT_N_ERR_STS_PORT_OK if the port is active or %0 if it is |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 482 | * inactive. |
| 483 | */ |
| 484 | static int |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 485 | rio_sport_is_active(struct rio_dev *rdev, int sp) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 486 | { |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 487 | u32 result = 0; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 488 | |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 489 | rio_read_config_32(rdev, RIO_DEV_PORT_N_ERR_STS_CSR(rdev, sp), |
| 490 | &result); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 491 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 492 | return result & RIO_PORT_N_ERR_STS_PORT_OK; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 493 | } |
| 494 | |
| 495 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 496 | * rio_get_host_deviceid_lock- Reads the Host Device ID Lock CSR on a device |
| 497 | * @port: Master port to send transaction |
| 498 | * @hopcount: Number of hops to the device |
| 499 | * |
| 500 | * Used during enumeration to read the Host Device ID Lock CSR on a |
| 501 | * RIO device. Returns the value of the lock register. |
| 502 | */ |
| 503 | static u16 rio_get_host_deviceid_lock(struct rio_mport *port, u8 hopcount) |
| 504 | { |
| 505 | u32 result; |
| 506 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 507 | rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), hopcount, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 508 | RIO_HOST_DID_LOCK_CSR, &result); |
| 509 | |
| 510 | return (u16) (result & 0xffff); |
| 511 | } |
| 512 | |
| 513 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 514 | * rio_enum_peer- Recursively enumerate a RIO network through a master port |
| 515 | * @net: RIO network being enumerated |
| 516 | * @port: Master port to send transactions |
| 517 | * @hopcount: Number of hops into the network |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 518 | * @prev: Previous RIO device connected to the enumerated one |
| 519 | * @prev_port: Port on previous RIO device |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 520 | * |
| 521 | * Recursively enumerates a RIO network. Transactions are sent via the |
| 522 | * master port passed in @port. |
| 523 | */ |
Bill Pemberton | 305c891e | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 524 | static int rio_enum_peer(struct rio_net *net, struct rio_mport *port, |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 525 | u8 hopcount, struct rio_dev *prev, int prev_port) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 526 | { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 527 | struct rio_dev *rdev; |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 528 | u32 regval; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 529 | int tmp; |
| 530 | |
Alexandre Bounine | e274e0e | 2010-10-27 15:34:32 -0700 | [diff] [blame] | 531 | if (rio_mport_chk_dev_access(port, |
| 532 | RIO_ANY_DESTID(port->sys_size), hopcount)) { |
| 533 | pr_debug("RIO: device access check failed\n"); |
| 534 | return -1; |
| 535 | } |
| 536 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 537 | if (rio_get_host_deviceid_lock(port, hopcount) == port->host_deviceid) { |
| 538 | pr_debug("RIO: PE already discovered by this host\n"); |
| 539 | /* |
| 540 | * Already discovered by this host. Add it as another |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 541 | * link to the existing device. |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 542 | */ |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 543 | rio_mport_read_config_32(port, RIO_ANY_DESTID(port->sys_size), |
| 544 | hopcount, RIO_COMPONENT_TAG_CSR, ®val); |
| 545 | |
| 546 | if (regval) { |
| 547 | rdev = rio_get_comptag((regval & 0xffff), NULL); |
| 548 | |
| 549 | if (rdev && prev && rio_is_switch(prev)) { |
| 550 | pr_debug("RIO: redundant path to %s\n", |
| 551 | rio_name(rdev)); |
| 552 | prev->rswitch->nextdev[prev_port] = rdev; |
| 553 | } |
| 554 | } |
| 555 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | /* Attempt to acquire device lock */ |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 560 | rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), |
| 561 | hopcount, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 562 | RIO_HOST_DID_LOCK_CSR, port->host_deviceid); |
| 563 | while ((tmp = rio_get_host_deviceid_lock(port, hopcount)) |
| 564 | < port->host_deviceid) { |
| 565 | /* Delay a bit */ |
| 566 | mdelay(1); |
| 567 | /* Attempt to acquire device lock again */ |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 568 | rio_mport_write_config_32(port, RIO_ANY_DESTID(port->sys_size), |
| 569 | hopcount, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 570 | RIO_HOST_DID_LOCK_CSR, |
| 571 | port->host_deviceid); |
| 572 | } |
| 573 | |
| 574 | if (rio_get_host_deviceid_lock(port, hopcount) > port->host_deviceid) { |
| 575 | pr_debug( |
| 576 | "RIO: PE locked by a higher priority host...retreating\n"); |
| 577 | return -1; |
| 578 | } |
| 579 | |
| 580 | /* Setup new RIO device */ |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 581 | rdev = rio_setup_device(net, port, RIO_ANY_DESTID(port->sys_size), |
| 582 | hopcount, 1); |
| 583 | if (rdev) { |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 584 | rdev->prev = prev; |
| 585 | if (prev && rio_is_switch(prev)) |
| 586 | prev->rswitch->nextdev[prev_port] = rdev; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 587 | } else |
| 588 | return -1; |
| 589 | |
| 590 | if (rio_is_switch(rdev)) { |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 591 | int sw_destid; |
| 592 | int cur_destid; |
| 593 | int sw_inport; |
| 594 | u16 destid; |
| 595 | int port_num; |
| 596 | |
Alexandre Bounine | ae05cbd | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 597 | sw_inport = RIO_GET_PORT_NUM(rdev->swpinfo); |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 598 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 599 | port->host_deviceid, sw_inport, 0); |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 600 | rdev->rswitch->route_table[port->host_deviceid] = sw_inport; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 601 | |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 602 | destid = rio_destid_first(net); |
| 603 | while (destid != RIO_INVALID_DESTID && destid < next_destid) { |
| 604 | if (destid != port->host_deviceid) { |
| 605 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, |
| 606 | destid, sw_inport, 0); |
| 607 | rdev->rswitch->route_table[destid] = sw_inport; |
| 608 | } |
| 609 | destid = rio_destid_next(net, destid + 1); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 610 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 611 | pr_debug( |
| 612 | "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 613 | rio_name(rdev), rdev->vid, rdev->did, |
| 614 | RIO_GET_TOTAL_PORTS(rdev->swpinfo)); |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 615 | sw_destid = next_destid; |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 616 | for (port_num = 0; |
| 617 | port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); |
| 618 | port_num++) { |
Alexandre Bounine | 8d4630d | 2012-10-04 17:16:02 -0700 | [diff] [blame] | 619 | if (sw_inport == port_num) { |
| 620 | rio_enable_rx_tx_port(port, 0, |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 621 | RIO_ANY_DESTID(port->sys_size), |
| 622 | hopcount, port_num); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 623 | rdev->rswitch->port_ok |= (1 << port_num); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 624 | continue; |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 625 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 626 | |
| 627 | cur_destid = next_destid; |
| 628 | |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 629 | if (rio_sport_is_active(rdev, port_num)) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 630 | pr_debug( |
| 631 | "RIO: scanning device on port %d\n", |
| 632 | port_num); |
Alexandre Bounine | 8d4630d | 2012-10-04 17:16:02 -0700 | [diff] [blame] | 633 | rio_enable_rx_tx_port(port, 0, |
| 634 | RIO_ANY_DESTID(port->sys_size), |
| 635 | hopcount, port_num); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 636 | rdev->rswitch->port_ok |= (1 << port_num); |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 637 | rio_route_add_entry(rdev, RIO_GLOBAL_TABLE, |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 638 | RIO_ANY_DESTID(port->sys_size), |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 639 | port_num, 0); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 640 | |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 641 | if (rio_enum_peer(net, port, hopcount + 1, |
| 642 | rdev, port_num) < 0) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 643 | return -1; |
| 644 | |
| 645 | /* Update routing tables */ |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 646 | destid = rio_destid_next(net, cur_destid + 1); |
| 647 | if (destid != RIO_INVALID_DESTID) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 648 | for (destid = cur_destid; |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 649 | destid < next_destid;) { |
| 650 | if (destid != port->host_deviceid) { |
| 651 | rio_route_add_entry(rdev, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 652 | RIO_GLOBAL_TABLE, |
| 653 | destid, |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 654 | port_num, |
| 655 | 0); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 656 | rdev->rswitch-> |
| 657 | route_table[destid] = |
| 658 | port_num; |
| 659 | } |
| 660 | destid = rio_destid_next(net, |
| 661 | destid + 1); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 662 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 663 | } |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 664 | } else { |
| 665 | /* If switch supports Error Management, |
| 666 | * set PORT_LOCKOUT bit for unused port |
| 667 | */ |
| 668 | if (rdev->em_efptr) |
| 669 | rio_set_port_lockout(rdev, port_num, 1); |
| 670 | |
| 671 | rdev->rswitch->port_ok &= ~(1 << port_num); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 672 | } |
| 673 | } |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 674 | |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 675 | /* Direct Port-write messages to the enumeratiing host */ |
| 676 | if ((rdev->src_ops & RIO_SRC_OPS_PORT_WRITE) && |
| 677 | (rdev->em_efptr)) { |
| 678 | rio_write_config_32(rdev, |
| 679 | rdev->em_efptr + RIO_EM_PW_TGT_DEVID, |
| 680 | (port->host_deviceid << 16) | |
| 681 | (port->sys_size << 15)); |
| 682 | } |
| 683 | |
| 684 | rio_init_em(rdev); |
| 685 | |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 686 | /* Check for empty switch */ |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 687 | if (next_destid == sw_destid) |
| 688 | next_destid = rio_destid_alloc(net); |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 689 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 690 | rdev->destid = sw_destid; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 691 | } else |
| 692 | pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", |
| 693 | rio_name(rdev), rdev->vid, rdev->did); |
| 694 | |
| 695 | return 0; |
| 696 | } |
| 697 | |
| 698 | /** |
| 699 | * rio_enum_complete- Tests if enumeration of a network is complete |
| 700 | * @port: Master port to send transaction |
| 701 | * |
Liu Gang | a571259 | 2011-11-02 13:39:05 -0700 | [diff] [blame] | 702 | * Tests the PGCCSR discovered bit for non-zero value (enumeration |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 703 | * complete flag). Return %1 if enumeration is complete or %0 if |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 704 | * enumeration is incomplete. |
| 705 | */ |
| 706 | static int rio_enum_complete(struct rio_mport *port) |
| 707 | { |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 708 | u32 regval; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 709 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 710 | rio_local_read_config_32(port, port->phys_efptr + RIO_PORT_GEN_CTL_CSR, |
| 711 | ®val); |
Liu Gang | a571259 | 2011-11-02 13:39:05 -0700 | [diff] [blame] | 712 | return (regval & RIO_PORT_GEN_DISCOVERED) ? 1 : 0; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | /** |
| 716 | * rio_disc_peer- Recursively discovers a RIO network through a master port |
| 717 | * @net: RIO network being discovered |
| 718 | * @port: Master port to send transactions |
| 719 | * @destid: Current destination ID in network |
| 720 | * @hopcount: Number of hops into the network |
Randy Dunlap | 9b310ac | 2011-01-22 20:16:12 -0800 | [diff] [blame] | 721 | * @prev: previous rio_dev |
| 722 | * @prev_port: previous port number |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 723 | * |
| 724 | * Recursively discovers a RIO network. Transactions are sent via the |
| 725 | * master port passed in @port. |
| 726 | */ |
Bill Pemberton | 305c891e | 2012-11-19 13:23:25 -0500 | [diff] [blame] | 727 | static int |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 728 | rio_disc_peer(struct rio_net *net, struct rio_mport *port, u16 destid, |
Alexandre Bounine | 17e9620 | 2011-01-12 17:00:41 -0800 | [diff] [blame] | 729 | u8 hopcount, struct rio_dev *prev, int prev_port) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 730 | { |
| 731 | u8 port_num, route_port; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 732 | struct rio_dev *rdev; |
| 733 | u16 ndestid; |
| 734 | |
| 735 | /* Setup new RIO device */ |
| 736 | if ((rdev = rio_setup_device(net, port, destid, hopcount, 0))) { |
Alexandre Bounine | 17e9620 | 2011-01-12 17:00:41 -0800 | [diff] [blame] | 737 | rdev->prev = prev; |
| 738 | if (prev && rio_is_switch(prev)) |
| 739 | prev->rswitch->nextdev[prev_port] = rdev; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 740 | } else |
| 741 | return -1; |
| 742 | |
| 743 | if (rio_is_switch(rdev)) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 744 | /* Associated destid is how we accessed this switch */ |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 745 | rdev->destid = destid; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 746 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 747 | pr_debug( |
| 748 | "RIO: found %s (vid %4.4x did %4.4x) with %d ports\n", |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 749 | rio_name(rdev), rdev->vid, rdev->did, |
| 750 | RIO_GET_TOTAL_PORTS(rdev->swpinfo)); |
| 751 | for (port_num = 0; |
| 752 | port_num < RIO_GET_TOTAL_PORTS(rdev->swpinfo); |
| 753 | port_num++) { |
Alexandre Bounine | ae05cbd | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 754 | if (RIO_GET_PORT_NUM(rdev->swpinfo) == port_num) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 755 | continue; |
| 756 | |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 757 | if (rio_sport_is_active(rdev, port_num)) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 758 | pr_debug( |
| 759 | "RIO: scanning device on port %d\n", |
| 760 | port_num); |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 761 | |
| 762 | rio_lock_device(port, destid, hopcount, 1000); |
| 763 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 764 | for (ndestid = 0; |
| 765 | ndestid < RIO_ANY_DESTID(port->sys_size); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 766 | ndestid++) { |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 767 | rio_route_get_entry(rdev, |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 768 | RIO_GLOBAL_TABLE, |
| 769 | ndestid, |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 770 | &route_port, 0); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 771 | if (route_port == port_num) |
| 772 | break; |
| 773 | } |
| 774 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 775 | if (ndestid == RIO_ANY_DESTID(port->sys_size)) |
| 776 | continue; |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 777 | rio_unlock_device(port, destid, hopcount); |
Alexandre Bounine | 17e9620 | 2011-01-12 17:00:41 -0800 | [diff] [blame] | 778 | if (rio_disc_peer(net, port, ndestid, |
| 779 | hopcount + 1, rdev, port_num) < 0) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 780 | return -1; |
| 781 | } |
| 782 | } |
| 783 | } else |
| 784 | pr_debug("RIO: found %s (vid %4.4x did %4.4x)\n", |
| 785 | rio_name(rdev), rdev->vid, rdev->did); |
| 786 | |
| 787 | return 0; |
| 788 | } |
| 789 | |
| 790 | /** |
| 791 | * rio_mport_is_active- Tests if master port link is active |
| 792 | * @port: Master port to test |
| 793 | * |
| 794 | * Reads the port error status CSR for the master port to |
| 795 | * determine if the port has an active link. Returns |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 796 | * %RIO_PORT_N_ERR_STS_PORT_OK if the master port is active |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 797 | * or %0 if it is inactive. |
| 798 | */ |
| 799 | static int rio_mport_is_active(struct rio_mport *port) |
| 800 | { |
| 801 | u32 result = 0; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 802 | |
Alexandre Bounine | 1ae842d | 2016-08-02 14:06:57 -0700 | [diff] [blame] | 803 | rio_local_read_config_32(port, |
| 804 | port->phys_efptr + |
| 805 | RIO_PORT_N_ERR_STS_CSR(port->index, port->phys_rmap), |
| 806 | &result); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 807 | return result & RIO_PORT_N_ERR_STS_PORT_OK; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 808 | } |
| 809 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 810 | static void rio_scan_release_net(struct rio_net *net) |
| 811 | { |
| 812 | pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id); |
| 813 | kfree(net->enum_data); |
| 814 | } |
| 815 | |
| 816 | static void rio_scan_release_dev(struct device *dev) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 817 | { |
| 818 | struct rio_net *net; |
| 819 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 820 | net = to_rio_net(dev); |
| 821 | pr_debug("RIO-SCAN: %s: net_%d\n", __func__, net->id); |
| 822 | kfree(net); |
| 823 | } |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 824 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 825 | /* |
| 826 | * rio_scan_alloc_net - Allocate and configure a new RIO network |
| 827 | * @mport: Master port associated with the RIO network |
| 828 | * @do_enum: Enumeration/Discovery mode flag |
| 829 | * @start: logical minimal start id for new net |
| 830 | * |
| 831 | * Allocates a new RIO network structure and initializes enumerator-specific |
| 832 | * part of it (if required). |
| 833 | * Returns a RIO network pointer on success or %NULL on failure. |
| 834 | */ |
| 835 | static struct rio_net *rio_scan_alloc_net(struct rio_mport *mport, |
| 836 | int do_enum, u16 start) |
| 837 | { |
| 838 | struct rio_net *net; |
| 839 | |
| 840 | net = rio_alloc_net(mport); |
| 841 | |
| 842 | if (net && do_enum) { |
| 843 | struct rio_id_table *idtab; |
| 844 | size_t size; |
| 845 | |
| 846 | size = sizeof(struct rio_id_table) + |
| 847 | BITS_TO_LONGS( |
| 848 | RIO_MAX_ROUTE_ENTRIES(mport->sys_size) |
| 849 | ) * sizeof(long); |
| 850 | |
| 851 | idtab = kzalloc(size, GFP_KERNEL); |
| 852 | |
| 853 | if (idtab == NULL) { |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 854 | pr_err("RIO: failed to allocate destID table\n"); |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 855 | rio_free_net(net); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 856 | net = NULL; |
| 857 | } else { |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 858 | net->enum_data = idtab; |
| 859 | net->release = rio_scan_release_net; |
| 860 | idtab->start = start; |
| 861 | idtab->max = RIO_MAX_ROUTE_ENTRIES(mport->sys_size); |
| 862 | spin_lock_init(&idtab->lock); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 863 | } |
| 864 | } |
| 865 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 866 | if (net) { |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 867 | net->id = mport->id; |
| 868 | net->hport = mport; |
| 869 | dev_set_name(&net->dev, "rnet_%d", net->id); |
| 870 | net->dev.parent = &mport->dev; |
| 871 | net->dev.release = rio_scan_release_dev; |
| 872 | rio_add_net(net); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 873 | } |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 874 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 875 | return net; |
| 876 | } |
| 877 | |
| 878 | /** |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 879 | * rio_update_route_tables- Updates route tables in switches |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 880 | * @net: RIO network to run update on |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 881 | * |
| 882 | * For each enumerated device, ensure that each switch in a system |
| 883 | * has correct routing entries. Add routes for devices that where |
Vasyl Gomonovych | b94bb1f | 2018-04-10 16:35:06 -0700 | [diff] [blame] | 884 | * unknown during the first enumeration pass through the switch. |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 885 | */ |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 886 | static void rio_update_route_tables(struct rio_net *net) |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 887 | { |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 888 | struct rio_dev *rdev, *swrdev; |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 889 | struct rio_switch *rswitch; |
| 890 | u8 sport; |
| 891 | u16 destid; |
| 892 | |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 893 | list_for_each_entry(rdev, &net->devices, net_list) { |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 894 | |
Alexandre Bounine | a93192a | 2011-01-12 17:00:38 -0800 | [diff] [blame] | 895 | destid = rdev->destid; |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 896 | |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 897 | list_for_each_entry(rswitch, &net->switches, node) { |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 898 | |
| 899 | if (rio_is_switch(rdev) && (rdev->rswitch == rswitch)) |
| 900 | continue; |
| 901 | |
| 902 | if (RIO_INVALID_ROUTE == rswitch->route_table[destid]) { |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 903 | swrdev = sw_to_rio_dev(rswitch); |
| 904 | |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 905 | /* Skip if destid ends in empty switch*/ |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 906 | if (swrdev->destid == destid) |
Alexandre Bounine | 07590ff | 2010-05-26 14:43:57 -0700 | [diff] [blame] | 907 | continue; |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 908 | |
Alexandre Bounine | ded0578 | 2011-01-12 17:00:39 -0800 | [diff] [blame] | 909 | sport = RIO_GET_PORT_NUM(swrdev->swpinfo); |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 910 | |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 911 | rio_route_add_entry(swrdev, RIO_GLOBAL_TABLE, |
| 912 | destid, sport, 0); |
| 913 | rswitch->route_table[destid] = sport; |
Alexandre Bounine | c70555b | 2007-02-10 01:46:47 -0800 | [diff] [blame] | 914 | } |
| 915 | } |
| 916 | } |
| 917 | } |
| 918 | |
| 919 | /** |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 920 | * rio_init_em - Initializes RIO Error Management (for switches) |
Randy Dunlap | 97ef6f7 | 2010-05-28 15:08:08 -0700 | [diff] [blame] | 921 | * @rdev: RIO device |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 922 | * |
| 923 | * For each enumerated switch, call device-specific error management |
| 924 | * initialization routine (if supplied by the switch driver). |
| 925 | */ |
| 926 | static void rio_init_em(struct rio_dev *rdev) |
| 927 | { |
| 928 | if (rio_is_switch(rdev) && (rdev->em_efptr) && |
Alexandre Bounine | 2ec3ba6 | 2013-07-03 15:08:50 -0700 | [diff] [blame] | 929 | rdev->rswitch->ops && rdev->rswitch->ops->em_init) { |
| 930 | rdev->rswitch->ops->em_init(rdev); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 931 | } |
| 932 | } |
| 933 | |
| 934 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 935 | * rio_enum_mport- Start enumeration through a master port |
| 936 | * @mport: Master port to send transactions |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 937 | * @flags: Enumeration control flags |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 938 | * |
| 939 | * Starts the enumeration process. If somebody has enumerated our |
| 940 | * master port device, then give up. If not and we have an active |
| 941 | * link, then start recursive peer enumeration. Returns %0 if |
| 942 | * enumeration succeeds or %-EBUSY if enumeration fails. |
| 943 | */ |
Wu Fengguang | 36f0efb | 2013-07-03 15:08:49 -0700 | [diff] [blame] | 944 | static int rio_enum_mport(struct rio_mport *mport, u32 flags) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 945 | { |
| 946 | struct rio_net *net = NULL; |
| 947 | int rc = 0; |
| 948 | |
| 949 | printk(KERN_INFO "RIO: enumerate master port %d, %s\n", mport->id, |
| 950 | mport->name); |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 951 | |
| 952 | /* |
| 953 | * To avoid multiple start requests (repeat enumeration is not supported |
| 954 | * by this method) check if enumeration/discovery was performed for this |
| 955 | * mport: if mport was added into the list of mports for a net exit |
| 956 | * with error. |
| 957 | */ |
| 958 | if (mport->nnode.next || mport->nnode.prev) |
| 959 | return -EBUSY; |
| 960 | |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 961 | /* If somebody else enumerated our master port device, bail. */ |
| 962 | if (rio_enum_host(mport) < 0) { |
| 963 | printk(KERN_INFO |
| 964 | "RIO: master port %d device has been enumerated by a remote host\n", |
| 965 | mport->id); |
| 966 | rc = -EBUSY; |
| 967 | goto out; |
| 968 | } |
| 969 | |
| 970 | /* If master port has an active link, allocate net and enum peers */ |
| 971 | if (rio_mport_is_active(mport)) { |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 972 | net = rio_scan_alloc_net(mport, 1, 0); |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 973 | if (!net) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 974 | printk(KERN_ERR "RIO: failed to allocate new net\n"); |
| 975 | rc = -ENOMEM; |
| 976 | goto out; |
| 977 | } |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 978 | |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 979 | /* reserve mport destID in new net */ |
| 980 | rio_destid_reserve(net, mport->host_deviceid); |
| 981 | |
Vasyl Gomonovych | b94bb1f | 2018-04-10 16:35:06 -0700 | [diff] [blame] | 982 | /* Enable Input Output Port (transmitter receiver) */ |
Thomas Moll | 933af4a | 2010-05-26 14:44:01 -0700 | [diff] [blame] | 983 | rio_enable_rx_tx_port(mport, 1, 0, 0, 0); |
| 984 | |
Alexandre Bounine | af84ca3 | 2010-10-27 15:34:34 -0700 | [diff] [blame] | 985 | /* Set component tag for host */ |
| 986 | rio_local_write_config_32(mport, RIO_COMPONENT_TAG_CSR, |
| 987 | next_comptag++); |
| 988 | |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 989 | next_destid = rio_destid_alloc(net); |
| 990 | |
Alexandre Bounine | 68fe4df | 2010-10-27 15:34:29 -0700 | [diff] [blame] | 991 | if (rio_enum_peer(net, mport, 0, NULL, 0) < 0) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 992 | /* A higher priority host won enumeration, bail. */ |
| 993 | printk(KERN_INFO |
| 994 | "RIO: master port %d device has lost enumeration to a remote host\n", |
| 995 | mport->id); |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 996 | rio_clear_locks(net); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 997 | rc = -EBUSY; |
| 998 | goto out; |
| 999 | } |
Alexandre Bounine | de74e00 | 2012-10-04 17:16:13 -0700 | [diff] [blame] | 1000 | /* free the last allocated destID (unused) */ |
| 1001 | rio_destid_free(net, next_destid); |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1002 | rio_update_route_tables(net); |
| 1003 | rio_clear_locks(net); |
Alexandre Bounine | e5cabeb | 2010-05-26 14:43:59 -0700 | [diff] [blame] | 1004 | rio_pw_enable(mport, 1); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1005 | } else { |
| 1006 | printk(KERN_INFO "RIO: master port %d link inactive\n", |
| 1007 | mport->id); |
| 1008 | rc = -EINVAL; |
| 1009 | } |
| 1010 | |
| 1011 | out: |
| 1012 | return rc; |
| 1013 | } |
| 1014 | |
| 1015 | /** |
| 1016 | * rio_build_route_tables- Generate route tables from switch route entries |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1017 | * @net: RIO network to run route tables scan on |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1018 | * |
| 1019 | * For each switch device, generate a route table by copying existing |
| 1020 | * route entries from the switch. |
| 1021 | */ |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1022 | static void rio_build_route_tables(struct rio_net *net) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1023 | { |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1024 | struct rio_switch *rswitch; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1025 | struct rio_dev *rdev; |
| 1026 | int i; |
| 1027 | u8 sport; |
| 1028 | |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1029 | list_for_each_entry(rswitch, &net->switches, node) { |
| 1030 | rdev = sw_to_rio_dev(rswitch); |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 1031 | |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1032 | rio_lock_device(net->hport, rdev->destid, |
| 1033 | rdev->hopcount, 1000); |
| 1034 | for (i = 0; |
| 1035 | i < RIO_MAX_ROUTE_ENTRIES(net->hport->sys_size); |
| 1036 | i++) { |
| 1037 | if (rio_route_get_entry(rdev, RIO_GLOBAL_TABLE, |
| 1038 | i, &sport, 0) < 0) |
| 1039 | continue; |
| 1040 | rswitch->route_table[i] = sport; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1041 | } |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1042 | |
| 1043 | rio_unlock_device(net->hport, rdev->destid, rdev->hopcount); |
| 1044 | } |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1045 | } |
| 1046 | |
| 1047 | /** |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1048 | * rio_disc_mport- Start discovery through a master port |
| 1049 | * @mport: Master port to send transactions |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 1050 | * @flags: discovery control flags |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1051 | * |
| 1052 | * Starts the discovery process. If we have an active link, |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 1053 | * then wait for the signal that enumeration is complete (if wait |
| 1054 | * is allowed). |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1055 | * When enumeration completion is signaled, start recursive |
| 1056 | * peer discovery. Returns %0 if discovery succeeds or %-EBUSY |
| 1057 | * on failure. |
| 1058 | */ |
Wu Fengguang | 36f0efb | 2013-07-03 15:08:49 -0700 | [diff] [blame] | 1059 | static int rio_disc_mport(struct rio_mport *mport, u32 flags) |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1060 | { |
| 1061 | struct rio_net *net = NULL; |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 1062 | unsigned long to_end; |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1063 | |
| 1064 | printk(KERN_INFO "RIO: discover master port %d, %s\n", mport->id, |
| 1065 | mport->name); |
| 1066 | |
| 1067 | /* If master port has an active link, allocate net and discover peers */ |
| 1068 | if (rio_mport_is_active(mport)) { |
Alexandre Bounine | bc8fcfe | 2013-05-24 15:55:06 -0700 | [diff] [blame] | 1069 | if (rio_enum_complete(mport)) |
| 1070 | goto enum_done; |
| 1071 | else if (flags & RIO_SCAN_ENUM_NO_WAIT) |
| 1072 | return -EAGAIN; |
| 1073 | |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 1074 | pr_debug("RIO: wait for enumeration to complete...\n"); |
| 1075 | |
| 1076 | to_end = jiffies + CONFIG_RAPIDIO_DISC_TIMEOUT * HZ; |
| 1077 | while (time_before(jiffies, to_end)) { |
| 1078 | if (rio_enum_complete(mport)) |
| 1079 | goto enum_done; |
Alexandre Bounine | f4c9c0e | 2012-10-10 15:53:58 -0700 | [diff] [blame] | 1080 | msleep(10); |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 1081 | } |
| 1082 | |
| 1083 | pr_debug("RIO: discovery timeout on mport %d %s\n", |
| 1084 | mport->id, mport->name); |
| 1085 | goto bail; |
| 1086 | enum_done: |
| 1087 | pr_debug("RIO: ... enumeration done\n"); |
| 1088 | |
Alexandre Bounine | e6b585c | 2016-03-22 14:26:17 -0700 | [diff] [blame] | 1089 | net = rio_scan_alloc_net(mport, 0, 0); |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 1090 | if (!net) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1091 | printk(KERN_ERR "RIO: Failed to allocate new net\n"); |
| 1092 | goto bail; |
| 1093 | } |
| 1094 | |
Alexandre Bounine | 818a04a | 2010-05-26 14:43:58 -0700 | [diff] [blame] | 1095 | /* Read DestID assigned by enumerator */ |
| 1096 | rio_local_read_config_32(mport, RIO_DID_CSR, |
| 1097 | &mport->host_deviceid); |
| 1098 | mport->host_deviceid = RIO_GET_DID(mport->sys_size, |
| 1099 | mport->host_deviceid); |
| 1100 | |
Zhang Wei | e042323 | 2008-04-18 13:33:42 -0700 | [diff] [blame] | 1101 | if (rio_disc_peer(net, mport, RIO_ANY_DESTID(mport->sys_size), |
Alexandre Bounine | 17e9620 | 2011-01-12 17:00:41 -0800 | [diff] [blame] | 1102 | 0, NULL, 0) < 0) { |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1103 | printk(KERN_INFO |
| 1104 | "RIO: master port %d device has failed discovery\n", |
| 1105 | mport->id); |
| 1106 | goto bail; |
| 1107 | } |
| 1108 | |
Alexandre Bounine | a7071ef | 2012-10-04 17:16:05 -0700 | [diff] [blame] | 1109 | rio_build_route_tables(net); |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | return 0; |
Alexandre Bounine | fa3dbaa | 2012-10-04 17:16:04 -0700 | [diff] [blame] | 1113 | bail: |
Matt Porter | eb188d0 | 2005-11-07 01:00:17 -0800 | [diff] [blame] | 1114 | return -EBUSY; |
| 1115 | } |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1116 | |
| 1117 | static struct rio_scan rio_scan_ops = { |
Alexandre Bounine | 9edbc30b | 2013-07-03 15:08:53 -0700 | [diff] [blame] | 1118 | .owner = THIS_MODULE, |
Alexandre Bounine | a11650e | 2013-05-24 15:55:05 -0700 | [diff] [blame] | 1119 | .enumerate = rio_enum_mport, |
| 1120 | .discover = rio_disc_mport, |
| 1121 | }; |
| 1122 | |
| 1123 | static bool scan; |
| 1124 | module_param(scan, bool, 0); |
| 1125 | MODULE_PARM_DESC(scan, "Start RapidIO network enumeration/discovery " |
| 1126 | "(default = 0)"); |
| 1127 | |
| 1128 | /** |
| 1129 | * rio_basic_attach: |
| 1130 | * |
| 1131 | * When this enumeration/discovery method is loaded as a module this function |
| 1132 | * registers its specific enumeration and discover routines for all available |
| 1133 | * RapidIO mport devices. The "scan" command line parameter controls ability of |
| 1134 | * the module to start RapidIO enumeration/discovery automatically. |
| 1135 | * |
| 1136 | * Returns 0 for success or -EIO if unable to register itself. |
| 1137 | * |
| 1138 | * This enumeration/discovery method cannot be unloaded and therefore does not |
| 1139 | * provide a matching cleanup_module routine. |
| 1140 | */ |
| 1141 | |
| 1142 | static int __init rio_basic_attach(void) |
| 1143 | { |
| 1144 | if (rio_register_scan(RIO_MPORT_ANY, &rio_scan_ops)) |
| 1145 | return -EIO; |
| 1146 | if (scan) |
| 1147 | rio_init_mports(); |
| 1148 | return 0; |
| 1149 | } |
| 1150 | |
| 1151 | late_initcall(rio_basic_attach); |
| 1152 | |
| 1153 | MODULE_DESCRIPTION("Basic RapidIO enumeration/discovery"); |
| 1154 | MODULE_LICENSE("GPL"); |