Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 4 | */ |
| 5 | |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 6 | #include <linux/bug.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 7 | #include <linux/completion.h> |
| 8 | #include <linux/crc-itu-t.h> |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 9 | #include <linux/device.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 10 | #include <linux/errno.h> |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 11 | #include <linux/firewire.h> |
| 12 | #include <linux/firewire-constants.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 13 | #include <linux/jiffies.h> |
| 14 | #include <linux/kernel.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 15 | #include <linux/kref.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 16 | #include <linux/list.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 17 | #include <linux/module.h> |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 18 | #include <linux/mutex.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 19 | #include <linux/spinlock.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 20 | #include <linux/workqueue.h> |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 21 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 22 | #include <linux/atomic.h> |
Stefan Richter | e8ca970 | 2009-06-04 21:09:38 +0200 | [diff] [blame] | 23 | #include <asm/byteorder.h> |
| 24 | |
Stefan Richter | 77c9a5d | 2009-06-05 16:26:18 +0200 | [diff] [blame] | 25 | #include "core.h" |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 26 | |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 27 | #define define_fw_printk_level(func, kern_level) \ |
| 28 | void func(const struct fw_card *card, const char *fmt, ...) \ |
| 29 | { \ |
| 30 | struct va_format vaf; \ |
| 31 | va_list args; \ |
| 32 | \ |
| 33 | va_start(args, fmt); \ |
| 34 | vaf.fmt = fmt; \ |
| 35 | vaf.va = &args; \ |
| 36 | printk(kern_level KBUILD_MODNAME " %s: %pV", \ |
| 37 | dev_name(card->device), &vaf); \ |
| 38 | va_end(args); \ |
| 39 | } |
| 40 | define_fw_printk_level(fw_err, KERN_ERR); |
| 41 | define_fw_printk_level(fw_notice, KERN_NOTICE); |
| 42 | |
Stefan Richter | cb7c96da3 | 2009-10-08 00:42:53 +0200 | [diff] [blame] | 43 | int fw_compute_block_crc(__be32 *block) |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 44 | { |
| 45 | int length; |
| 46 | u16 crc; |
| 47 | |
| 48 | length = (be32_to_cpu(block[0]) >> 16) & 0xff; |
| 49 | crc = crc_itu_t(0, (u8 *)&block[1], length * 4); |
| 50 | *block |= cpu_to_be32(crc); |
| 51 | |
| 52 | return length; |
| 53 | } |
| 54 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 55 | static DEFINE_MUTEX(card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 56 | static LIST_HEAD(card_list); |
| 57 | |
| 58 | static LIST_HEAD(descriptor_list); |
| 59 | static int descriptor_count; |
| 60 | |
Stefan Richter | fe24257 | 2009-10-08 00:42:27 +0200 | [diff] [blame] | 61 | static __be32 tmp_config_rom[256]; |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 62 | /* ROM header, bus info block, root dir header, capabilities = 7 quadlets */ |
| 63 | static size_t config_rom_length = 1 + 4 + 1 + 1; |
Stefan Richter | fe24257 | 2009-10-08 00:42:27 +0200 | [diff] [blame] | 64 | |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 65 | #define BIB_CRC(v) ((v) << 0) |
| 66 | #define BIB_CRC_LENGTH(v) ((v) << 16) |
| 67 | #define BIB_INFO_LENGTH(v) ((v) << 24) |
Stefan Richter | edd5bda | 2010-04-14 22:30:18 +0200 | [diff] [blame] | 68 | #define BIB_BUS_NAME 0x31333934 /* "1394" */ |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 69 | #define BIB_LINK_SPEED(v) ((v) << 0) |
| 70 | #define BIB_GENERATION(v) ((v) << 4) |
| 71 | #define BIB_MAX_ROM(v) ((v) << 8) |
| 72 | #define BIB_MAX_RECEIVE(v) ((v) << 12) |
| 73 | #define BIB_CYC_CLK_ACC(v) ((v) << 16) |
| 74 | #define BIB_PMC ((1) << 27) |
| 75 | #define BIB_BMC ((1) << 28) |
| 76 | #define BIB_ISC ((1) << 29) |
| 77 | #define BIB_CMC ((1) << 30) |
Stefan Richter | edd5bda | 2010-04-14 22:30:18 +0200 | [diff] [blame] | 78 | #define BIB_IRMC ((1) << 31) |
| 79 | #define NODE_CAPABILITIES 0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 80 | |
Clemens Ladisch | dd5eeb9 | 2011-03-07 11:21:15 +0100 | [diff] [blame] | 81 | /* |
| 82 | * IEEE-1394 specifies a default SPLIT_TIMEOUT value of 800 cycles (100 ms), |
| 83 | * but we have to make it longer because there are many devices whose firmware |
| 84 | * is just too slow for that. |
| 85 | */ |
| 86 | #define DEFAULT_SPLIT_TIMEOUT (2 * 8000) |
| 87 | |
Stefan Richter | 6044565 | 2011-01-15 18:19:48 +0100 | [diff] [blame] | 88 | #define CANON_OUI 0x000085 |
| 89 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 90 | static void generate_config_rom(struct fw_card *card, __be32 *config_rom) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 91 | { |
| 92 | struct fw_descriptor *desc; |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 93 | int i, j, k, length; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 94 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 95 | /* |
| 96 | * Initialize contents of config rom buffer. On the OHCI |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 97 | * controller, block reads to the config rom accesses the host |
| 98 | * memory, but quadlet read access the hardware bus info block |
| 99 | * registers. That's just crack, but it means we should make |
Jay Fenlason | 2cc489c2 | 2008-10-22 15:59:42 -0400 | [diff] [blame] | 100 | * sure the contents of bus info block in host memory matches |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 101 | * the version stored in the OHCI registers. |
| 102 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 103 | |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 104 | config_rom[0] = cpu_to_be32( |
| 105 | BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0)); |
Stefan Richter | edd5bda | 2010-04-14 22:30:18 +0200 | [diff] [blame] | 106 | config_rom[1] = cpu_to_be32(BIB_BUS_NAME); |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 107 | config_rom[2] = cpu_to_be32( |
Kristian Høgsberg | a77754a | 2007-05-07 20:33:35 -0400 | [diff] [blame] | 108 | BIB_LINK_SPEED(card->link_speed) | |
| 109 | BIB_GENERATION(card->config_rom_generation++ % 14 + 2) | |
| 110 | BIB_MAX_ROM(2) | |
| 111 | BIB_MAX_RECEIVE(card->max_receive) | |
Stefan Richter | edd5bda | 2010-04-14 22:30:18 +0200 | [diff] [blame] | 112 | BIB_BMC | BIB_ISC | BIB_CMC | BIB_IRMC); |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 113 | config_rom[3] = cpu_to_be32(card->guid >> 32); |
| 114 | config_rom[4] = cpu_to_be32(card->guid); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 115 | |
| 116 | /* Generate root directory. */ |
Stefan Richter | edd5bda | 2010-04-14 22:30:18 +0200 | [diff] [blame] | 117 | config_rom[6] = cpu_to_be32(NODE_CAPABILITIES); |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 118 | i = 7; |
| 119 | j = 7 + descriptor_count; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 120 | |
| 121 | /* Generate root directory entries for descriptors. */ |
| 122 | list_for_each_entry (desc, &descriptor_list, link) { |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 123 | if (desc->immediate > 0) |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 124 | config_rom[i++] = cpu_to_be32(desc->immediate); |
| 125 | config_rom[i] = cpu_to_be32(desc->key | (j - i)); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 126 | i++; |
| 127 | j += desc->length; |
| 128 | } |
| 129 | |
| 130 | /* Update root directory length. */ |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 131 | config_rom[5] = cpu_to_be32((i - 5 - 1) << 16); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 132 | |
| 133 | /* End of root directory, now copy in descriptors. */ |
| 134 | list_for_each_entry (desc, &descriptor_list, link) { |
Stefan Richter | 8e85973 | 2009-10-08 00:41:59 +0200 | [diff] [blame] | 135 | for (k = 0; k < desc->length; k++) |
| 136 | config_rom[i + k] = cpu_to_be32(desc->data[k]); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 137 | i += desc->length; |
| 138 | } |
| 139 | |
| 140 | /* Calculate CRCs for all blocks in the config rom. This |
| 141 | * assumes that CRC length and info length are identical for |
| 142 | * the bus info block, which is always the case for this |
| 143 | * implementation. */ |
Kristian Høgsberg | e175569 | 2007-05-07 20:33:31 -0400 | [diff] [blame] | 144 | for (i = 0; i < j; i += length + 1) |
Stefan Richter | cb7c96da3 | 2009-10-08 00:42:53 +0200 | [diff] [blame] | 145 | length = fw_compute_block_crc(config_rom + i); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 146 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 147 | WARN_ON(j != config_rom_length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 148 | } |
| 149 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 150 | static void update_config_roms(void) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 151 | { |
| 152 | struct fw_card *card; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 153 | |
| 154 | list_for_each_entry (card, &card_list, link) { |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 155 | generate_config_rom(card, tmp_config_rom); |
| 156 | card->driver->set_config_rom(card, tmp_config_rom, |
| 157 | config_rom_length); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 158 | } |
| 159 | } |
| 160 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 161 | static size_t required_space(struct fw_descriptor *desc) |
| 162 | { |
| 163 | /* descriptor + entry into root dir + optional immediate entry */ |
| 164 | return desc->length + 1 + (desc->immediate > 0 ? 1 : 0); |
| 165 | } |
| 166 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 167 | int fw_core_add_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 168 | { |
| 169 | size_t i; |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 170 | int ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 171 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 172 | /* |
| 173 | * Check descriptor is valid; the length of all blocks in the |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 174 | * descriptor has to add up to exactly the length of the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 175 | * block. |
| 176 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 177 | i = 0; |
| 178 | while (i < desc->length) |
| 179 | i += (desc->data[i] >> 16) + 1; |
| 180 | |
| 181 | if (i != desc->length) |
Kristian Høgsberg | 66dea3e | 2007-03-28 21:26:42 +0200 | [diff] [blame] | 182 | return -EINVAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 183 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 184 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 185 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 186 | if (config_rom_length + required_space(desc) > 256) { |
| 187 | ret = -EBUSY; |
| 188 | } else { |
| 189 | list_add_tail(&desc->link, &descriptor_list); |
| 190 | config_rom_length += required_space(desc); |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 191 | descriptor_count++; |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 192 | if (desc->immediate > 0) |
| 193 | descriptor_count++; |
| 194 | update_config_roms(); |
| 195 | ret = 0; |
| 196 | } |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 197 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 198 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 199 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 200 | return ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 201 | } |
Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 202 | EXPORT_SYMBOL(fw_core_add_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 203 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 204 | void fw_core_remove_descriptor(struct fw_descriptor *desc) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 205 | { |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 206 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 207 | |
| 208 | list_del(&desc->link); |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 209 | config_rom_length -= required_space(desc); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 210 | descriptor_count--; |
Kristian Høgsberg | 937f687 | 2007-03-07 12:12:36 -0500 | [diff] [blame] | 211 | if (desc->immediate > 0) |
| 212 | descriptor_count--; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 213 | update_config_roms(); |
| 214 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 215 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 216 | } |
Jay Fenlason | c76acec | 2009-05-18 13:08:06 -0400 | [diff] [blame] | 217 | EXPORT_SYMBOL(fw_core_remove_descriptor); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 218 | |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 219 | static int reset_bus(struct fw_card *card, bool short_reset) |
| 220 | { |
| 221 | int reg = short_reset ? 5 : 1; |
| 222 | int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET; |
| 223 | |
| 224 | return card->driver->update_phy_reg(card, reg, 0, bit); |
| 225 | } |
| 226 | |
| 227 | void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset) |
| 228 | { |
| 229 | /* We don't try hard to sort out requests of long vs. short resets. */ |
| 230 | card->br_short = short_reset; |
| 231 | |
| 232 | /* Use an arbitrary short delay to combine multiple reset requests. */ |
| 233 | fw_card_get(card); |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 234 | if (!queue_delayed_work(fw_workqueue, &card->br_work, |
Stefan Richter | 6ea9e7b | 2010-10-13 13:39:46 +0200 | [diff] [blame] | 235 | delayed ? DIV_ROUND_UP(HZ, 100) : 0)) |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 236 | fw_card_put(card); |
| 237 | } |
| 238 | EXPORT_SYMBOL(fw_schedule_bus_reset); |
| 239 | |
| 240 | static void br_work(struct work_struct *work) |
| 241 | { |
| 242 | struct fw_card *card = container_of(work, struct fw_card, br_work.work); |
| 243 | |
| 244 | /* Delay for 2s after last reset per IEEE 1394 clause 8.2.1. */ |
| 245 | if (card->reset_jiffies != 0 && |
Clemens Ladisch | e71084a | 2011-01-22 15:05:03 +0100 | [diff] [blame] | 246 | time_before64(get_jiffies_64(), card->reset_jiffies + 2 * HZ)) { |
Stefan Richter | 105e53f | 2011-05-01 20:50:31 +0200 | [diff] [blame] | 247 | if (!queue_delayed_work(fw_workqueue, &card->br_work, 2 * HZ)) |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 248 | fw_card_put(card); |
| 249 | return; |
| 250 | } |
| 251 | |
| 252 | fw_send_phy_config(card, FW_PHY_CONFIG_NO_NODE_ID, card->generation, |
| 253 | FW_PHY_CONFIG_CURRENT_GAP_COUNT); |
| 254 | reset_bus(card, card->br_short); |
| 255 | fw_card_put(card); |
| 256 | } |
| 257 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 258 | static void allocate_broadcast_channel(struct fw_card *card, int generation) |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 259 | { |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 260 | int channel, bandwidth = 0; |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 261 | |
Clemens Ladisch | e91b278 | 2010-06-10 08:40:49 +0200 | [diff] [blame] | 262 | if (!card->broadcast_channel_allocated) { |
| 263 | fw_iso_resource_manage(card, generation, 1ULL << 31, |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 264 | &channel, &bandwidth, true); |
Clemens Ladisch | e91b278 | 2010-06-10 08:40:49 +0200 | [diff] [blame] | 265 | if (channel != 31) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 266 | fw_notice(card, "failed to allocate broadcast channel\n"); |
Clemens Ladisch | e91b278 | 2010-06-10 08:40:49 +0200 | [diff] [blame] | 267 | return; |
| 268 | } |
Stefan Richter | 7889b60 | 2009-03-10 21:09:28 +0100 | [diff] [blame] | 269 | card->broadcast_channel_allocated = true; |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 270 | } |
Clemens Ladisch | e91b278 | 2010-06-10 08:40:49 +0200 | [diff] [blame] | 271 | |
| 272 | device_for_each_child(card->device, (void *)(long)generation, |
| 273 | fw_device_set_broadcast_channel); |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 274 | } |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 275 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 276 | static const char gap_count_table[] = { |
| 277 | 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40 |
| 278 | }; |
| 279 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 280 | void fw_schedule_bm_work(struct fw_card *card, unsigned long delay) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 281 | { |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 282 | fw_card_get(card); |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 283 | if (!schedule_delayed_work(&card->bm_work, delay)) |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 284 | fw_card_put(card); |
| 285 | } |
| 286 | |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 287 | static void bm_work(struct work_struct *work) |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 288 | { |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 289 | struct fw_card *card = container_of(work, struct fw_card, bm_work.work); |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 290 | struct fw_device *root_device, *irm_device; |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 291 | struct fw_node *root_node; |
Stefan Richter | 250b2b6 | 2010-06-21 23:24:35 +0200 | [diff] [blame] | 292 | int root_id, new_root_id, irm_id, bm_id, local_id; |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 293 | int gap_count, generation, grace, rcode; |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 294 | bool do_reset = false; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 295 | bool root_device_is_running; |
| 296 | bool root_device_is_cmc; |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 297 | bool irm_is_1394_1995_only; |
Stefan Richter | 6044565 | 2011-01-15 18:19:48 +0100 | [diff] [blame] | 298 | bool keep_this_irm; |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 299 | __be32 transaction_data[2]; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 300 | |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 301 | spin_lock_irq(&card->lock); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 302 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 303 | if (card->local_node == NULL) { |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 304 | spin_unlock_irq(&card->lock); |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 305 | goto out_put_card; |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 306 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 307 | |
| 308 | generation = card->generation; |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 309 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 310 | root_node = card->root_node; |
| 311 | fw_node_get(root_node); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 312 | root_device = root_node->data; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 313 | root_device_is_running = root_device && |
| 314 | atomic_read(&root_device->state) == FW_DEVICE_RUNNING; |
| 315 | root_device_is_cmc = root_device && root_device->cmc; |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 316 | |
| 317 | irm_device = card->irm_node->data; |
| 318 | irm_is_1394_1995_only = irm_device && irm_device->config_rom && |
| 319 | (irm_device->config_rom[2] & 0x000000f0) == 0; |
| 320 | |
Stefan Richter | 6044565 | 2011-01-15 18:19:48 +0100 | [diff] [blame] | 321 | /* Canon MV5i works unreliably if it is not root node. */ |
| 322 | keep_this_irm = irm_device && irm_device->config_rom && |
| 323 | irm_device->config_rom[3] >> 8 == CANON_OUI; |
| 324 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 325 | root_id = root_node->node_id; |
| 326 | irm_id = card->irm_node->node_id; |
| 327 | local_id = card->local_node->node_id; |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 328 | |
Clemens Ladisch | e71084a | 2011-01-22 15:05:03 +0100 | [diff] [blame] | 329 | grace = time_after64(get_jiffies_64(), |
| 330 | card->reset_jiffies + DIV_ROUND_UP(HZ, 8)); |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 331 | |
Clemens Ladisch | 7e0e314f | 2010-06-10 08:37:15 +0200 | [diff] [blame] | 332 | if ((is_next_generation(generation, card->bm_generation) && |
| 333 | !card->bm_abdicate) || |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 334 | (card->bm_generation != generation && grace)) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 335 | /* |
| 336 | * This first step is to figure out who is IRM and |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 337 | * then try to become bus manager. If the IRM is not |
| 338 | * well defined (e.g. does not have an active link |
| 339 | * layer or does not responds to our lock request, we |
| 340 | * will have to do a little vigilante bus management. |
| 341 | * In that case, we do a goto into the gap count logic |
| 342 | * so that when we do the reset, we still optimize the |
| 343 | * gap count. That could well save a reset in the |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 344 | * next generation. |
| 345 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 346 | |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 347 | if (!card->irm_node->link_on) { |
| 348 | new_root_id = local_id; |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 349 | fw_notice(card, "%s, making local node (%02x) root\n", |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 350 | "IRM has link off", new_root_id); |
| 351 | goto pick_me; |
| 352 | } |
| 353 | |
Stefan Richter | 6044565 | 2011-01-15 18:19:48 +0100 | [diff] [blame] | 354 | if (irm_is_1394_1995_only && !keep_this_irm) { |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 355 | new_root_id = local_id; |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 356 | fw_notice(card, "%s, making local node (%02x) root\n", |
Stefan Richter | 1038953 | 2010-05-30 19:43:52 +0200 | [diff] [blame] | 357 | "IRM is not 1394a compliant", new_root_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 358 | goto pick_me; |
| 359 | } |
| 360 | |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 361 | transaction_data[0] = cpu_to_be32(0x3f); |
| 362 | transaction_data[1] = cpu_to_be32(local_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 363 | |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 364 | spin_unlock_irq(&card->lock); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 365 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 366 | rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP, |
| 367 | irm_id, generation, SCODE_100, |
| 368 | CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID, |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 369 | transaction_data, 8); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 370 | |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 371 | if (rcode == RCODE_GENERATION) |
| 372 | /* Another bus reset, BM work has been rescheduled. */ |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 373 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 374 | |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 375 | bm_id = be32_to_cpu(transaction_data[0]); |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 376 | |
Stefan Richter | 250b2b6 | 2010-06-21 23:24:35 +0200 | [diff] [blame] | 377 | spin_lock_irq(&card->lock); |
| 378 | if (rcode == RCODE_COMPLETE && generation == card->generation) |
| 379 | card->bm_node_id = |
| 380 | bm_id == 0x3f ? local_id : 0xffc0 | bm_id; |
| 381 | spin_unlock_irq(&card->lock); |
| 382 | |
| 383 | if (rcode == RCODE_COMPLETE && bm_id != 0x3f) { |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 384 | /* Somebody else is BM. Only act as IRM. */ |
| 385 | if (local_id == irm_id) |
| 386 | allocate_broadcast_channel(card, generation); |
| 387 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 388 | goto out; |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 389 | } |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 390 | |
Clemens Ladisch | bda3b8a | 2010-06-10 08:23:28 +0200 | [diff] [blame] | 391 | if (rcode == RCODE_SEND_ERROR) { |
| 392 | /* |
| 393 | * We have been unable to send the lock request due to |
| 394 | * some local problem. Let's try again later and hope |
| 395 | * that the problem has gone away by then. |
| 396 | */ |
| 397 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
| 398 | goto out; |
| 399 | } |
| 400 | |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 401 | spin_lock_irq(&card->lock); |
Jay Fenlason | 1e119fa | 2008-07-20 14:20:53 +0200 | [diff] [blame] | 402 | |
Stefan Richter | 6044565 | 2011-01-15 18:19:48 +0100 | [diff] [blame] | 403 | if (rcode != RCODE_COMPLETE && !keep_this_irm) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 404 | /* |
| 405 | * The lock request failed, maybe the IRM |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 406 | * isn't really IRM capable after all. Let's |
| 407 | * do a bus reset and pick the local node as |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 408 | * root, and thus, IRM. |
| 409 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 410 | new_root_id = local_id; |
Clemens Ladisch | 3b00b00 | 2012-04-11 17:38:47 +0200 | [diff] [blame] | 411 | fw_notice(card, "BM lock failed (%s), making local node (%02x) root\n", |
| 412 | fw_rcode_string(rcode), new_root_id); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 413 | goto pick_me; |
| 414 | } |
| 415 | } else if (card->bm_generation != generation) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 416 | /* |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 417 | * We weren't BM in the last generation, and the last |
| 418 | * bus reset is less than 125ms ago. Reschedule this job. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 419 | */ |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 420 | spin_unlock_irq(&card->lock); |
Stefan Richter | e1dc7ca | 2009-03-10 21:07:46 +0100 | [diff] [blame] | 421 | fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8)); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 422 | goto out; |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 423 | } |
| 424 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 425 | /* |
| 426 | * We're bus manager for this generation, so next step is to |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 427 | * make sure we have an active cycle master and do gap count |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 428 | * optimization. |
| 429 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 430 | card->bm_generation = generation; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 431 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 432 | if (root_device == NULL) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 433 | /* |
| 434 | * Either link_on is false, or we failed to read the |
| 435 | * config rom. In either case, pick another root. |
| 436 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 437 | new_root_id = local_id; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 438 | } else if (!root_device_is_running) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 439 | /* |
| 440 | * If we haven't probed this device yet, bail out now |
| 441 | * and let's try again once that's done. |
| 442 | */ |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 443 | spin_unlock_irq(&card->lock); |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 444 | goto out; |
Stefan Richter | 6230582 | 2009-01-09 20:49:37 +0100 | [diff] [blame] | 445 | } else if (root_device_is_cmc) { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 446 | /* |
Clemens Ladisch | c374ab4 | 2010-06-10 08:41:51 +0200 | [diff] [blame] | 447 | * We will send out a force root packet for this |
| 448 | * node as part of the gap count optimization. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 449 | */ |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 450 | new_root_id = root_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 451 | } else { |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 452 | /* |
| 453 | * Current root has an active link layer and we |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 454 | * successfully read the config rom, but it's not |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 455 | * cycle master capable. |
| 456 | */ |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 457 | new_root_id = local_id; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 458 | } |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 459 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 460 | pick_me: |
Stefan Richter | 24d4012 | 2007-06-18 19:44:12 +0200 | [diff] [blame] | 461 | /* |
| 462 | * Pick a gap count from 1394a table E-1. The table doesn't cover |
| 463 | * the typically much larger 1394b beta repeater delays though. |
| 464 | */ |
| 465 | if (!card->beta_repeaters_present && |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 466 | root_node->max_hops < ARRAY_SIZE(gap_count_table)) |
| 467 | gap_count = gap_count_table[root_node->max_hops]; |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 468 | else |
| 469 | gap_count = 63; |
| 470 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 471 | /* |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 472 | * Finally, figure out if we should do a reset or not. If we have |
| 473 | * done less than 5 resets with the same physical topology and we |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 474 | * have either a new root or a new gap count setting, let's do it. |
| 475 | */ |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 476 | |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 477 | if (card->bm_retries++ < 5 && |
| 478 | (card->gap_count != gap_count || new_root_id != root_id)) |
Stefan Richter | 25b1c3d | 2008-03-24 20:57:12 +0100 | [diff] [blame] | 479 | do_reset = true; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 480 | |
Stefan Richter | ae94801 | 2010-06-21 23:23:52 +0200 | [diff] [blame] | 481 | spin_unlock_irq(&card->lock); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 482 | |
Kristian Høgsberg | 83db801 | 2007-01-26 00:37:50 -0500 | [diff] [blame] | 483 | if (do_reset) { |
Stefan Richter | 26b4950 | 2012-02-18 22:03:14 +0100 | [diff] [blame] | 484 | fw_notice(card, "phy config: new root=%x, gap_count=%d\n", |
| 485 | new_root_id, gap_count); |
Kristian Høgsberg | 931c483 | 2007-01-26 00:38:45 -0500 | [diff] [blame] | 486 | fw_send_phy_config(card, new_root_id, generation, gap_count); |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 487 | reset_bus(card, true); |
Stefan Richter | cbae787 | 2009-03-10 21:08:37 +0100 | [diff] [blame] | 488 | /* Will allocate broadcast channel after the reset. */ |
Clemens Ladisch | c374ab4 | 2010-06-10 08:41:51 +0200 | [diff] [blame] | 489 | goto out; |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 490 | } |
Jay Fenlason | 6104ee9 | 2009-02-23 15:59:34 -0500 | [diff] [blame] | 491 | |
Clemens Ladisch | c374ab4 | 2010-06-10 08:41:51 +0200 | [diff] [blame] | 492 | if (root_device_is_cmc) { |
| 493 | /* |
| 494 | * Make sure that the cycle master sends cycle start packets. |
| 495 | */ |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 496 | transaction_data[0] = cpu_to_be32(CSR_STATE_BIT_CMSTR); |
Clemens Ladisch | c374ab4 | 2010-06-10 08:41:51 +0200 | [diff] [blame] | 497 | rcode = fw_run_transaction(card, TCODE_WRITE_QUADLET_REQUEST, |
| 498 | root_id, generation, SCODE_100, |
| 499 | CSR_REGISTER_BASE + CSR_STATE_SET, |
Stefan Richter | f30e6d3 | 2011-04-22 15:13:54 +0200 | [diff] [blame] | 500 | transaction_data, 4); |
Clemens Ladisch | c374ab4 | 2010-06-10 08:41:51 +0200 | [diff] [blame] | 501 | if (rcode == RCODE_GENERATION) |
| 502 | goto out; |
| 503 | } |
| 504 | |
| 505 | if (local_id == irm_id) |
| 506 | allocate_broadcast_channel(card, generation); |
| 507 | |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 508 | out: |
Stefan Richter | 1580347 | 2008-02-24 18:57:23 +0100 | [diff] [blame] | 509 | fw_node_put(root_node); |
Jay Fenlason | 0fa1986f | 2008-11-29 17:44:57 +0100 | [diff] [blame] | 510 | out_put_card: |
| 511 | fw_card_put(card); |
Kristian Høgsberg | 19a15b9 | 2006-12-19 19:58:31 -0500 | [diff] [blame] | 512 | } |
| 513 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 514 | void fw_card_initialize(struct fw_card *card, |
| 515 | const struct fw_card_driver *driver, |
| 516 | struct device *device) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 517 | { |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 518 | static atomic_t index = ATOMIC_INIT(-1); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 519 | |
Kristian Høgsberg | bbf19db | 2007-02-06 14:49:38 -0500 | [diff] [blame] | 520 | card->index = atomic_inc_return(&index); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 521 | card->driver = driver; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 522 | card->device = device; |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 523 | card->current_tlabel = 0; |
| 524 | card->tlabel_mask = 0; |
Clemens Ladisch | dd5eeb9 | 2011-03-07 11:21:15 +0100 | [diff] [blame] | 525 | card->split_timeout_hi = DEFAULT_SPLIT_TIMEOUT / 8000; |
| 526 | card->split_timeout_lo = (DEFAULT_SPLIT_TIMEOUT % 8000) << 19; |
| 527 | card->split_timeout_cycles = DEFAULT_SPLIT_TIMEOUT; |
| 528 | card->split_timeout_jiffies = |
| 529 | DIV_ROUND_UP(DEFAULT_SPLIT_TIMEOUT * HZ, 8000); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 530 | card->color = 0; |
Stefan Richter | e534fe1 | 2008-05-24 16:41:09 +0200 | [diff] [blame] | 531 | card->broadcast_channel = BROADCAST_CHANNEL_INITIAL; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 532 | |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 533 | kref_init(&card->kref); |
| 534 | init_completion(&card->done); |
Stefan Richter | 5e20c28 | 2007-01-21 20:44:09 +0100 | [diff] [blame] | 535 | INIT_LIST_HEAD(&card->transaction_list); |
Stefan Richter | bf54e14 | 2010-07-16 22:25:51 +0200 | [diff] [blame] | 536 | INIT_LIST_HEAD(&card->phy_receiver_list); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 537 | spin_lock_init(&card->lock); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 538 | |
| 539 | card->local_node = NULL; |
| 540 | |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 541 | INIT_DELAYED_WORK(&card->br_work, br_work); |
| 542 | INIT_DELAYED_WORK(&card->bm_work, bm_work); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 543 | } |
| 544 | EXPORT_SYMBOL(fw_card_initialize); |
| 545 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 546 | int fw_card_add(struct fw_card *card, |
| 547 | u32 max_receive, u32 link_speed, u64 guid) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 548 | { |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 549 | int ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 550 | |
| 551 | card->max_receive = max_receive; |
| 552 | card->link_speed = link_speed; |
| 553 | card->guid = guid; |
| 554 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 555 | mutex_lock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 556 | |
Stefan Richter | e300839 | 2010-01-24 14:47:02 +0100 | [diff] [blame] | 557 | generate_config_rom(card, tmp_config_rom); |
| 558 | ret = card->driver->enable(card, tmp_config_rom, config_rom_length); |
Stefan Richter | b171e20 | 2009-09-06 18:50:29 +0200 | [diff] [blame] | 559 | if (ret == 0) |
| 560 | list_add_tail(&card->link, &card_list); |
| 561 | |
| 562 | mutex_unlock(&card_mutex); |
Stefan Richter | e1eff7a | 2009-02-03 17:55:19 +0100 | [diff] [blame] | 563 | |
| 564 | return ret; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 565 | } |
| 566 | EXPORT_SYMBOL(fw_card_add); |
| 567 | |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 568 | /* |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 569 | * The next few functions implement a dummy driver that is used once a card |
| 570 | * driver shuts down an fw_card. This allows the driver to cleanly unload, |
| 571 | * as all IO to the card will be handled (and failed) by the dummy driver |
| 572 | * instead of calling into the module. Only functions for iso context |
| 573 | * shutdown still need to be provided by the card driver. |
Stefan Richter | 2080222 | 2010-08-01 12:23:14 +0200 | [diff] [blame] | 574 | * |
| 575 | * .read/write_csr() should never be called anymore after the dummy driver |
| 576 | * was bound since they are only used within request handler context. |
| 577 | * .set_config_rom() is never called since the card is taken out of card_list |
| 578 | * before switching to the dummy driver. |
Kristian Høgsberg | c781c06 | 2007-05-07 20:33:32 -0400 | [diff] [blame] | 579 | */ |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 580 | |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 581 | static int dummy_read_phy_reg(struct fw_card *card, int address) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 582 | { |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 583 | return -ENODEV; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 584 | } |
| 585 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 586 | static int dummy_update_phy_reg(struct fw_card *card, int address, |
| 587 | int clear_bits, int set_bits) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 588 | { |
| 589 | return -ENODEV; |
| 590 | } |
| 591 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 592 | static void dummy_send_request(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 593 | { |
Stefan Richter | 18d0cdf | 2010-07-18 12:44:01 +0200 | [diff] [blame] | 594 | packet->callback(packet, card, RCODE_CANCELLED); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 595 | } |
| 596 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 597 | static void dummy_send_response(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 598 | { |
Stefan Richter | 18d0cdf | 2010-07-18 12:44:01 +0200 | [diff] [blame] | 599 | packet->callback(packet, card, RCODE_CANCELLED); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 600 | } |
| 601 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 602 | static int dummy_cancel_packet(struct fw_card *card, struct fw_packet *packet) |
Kristian Høgsberg | 730c32f | 2007-02-06 14:49:32 -0500 | [diff] [blame] | 603 | { |
| 604 | return -ENOENT; |
| 605 | } |
| 606 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 607 | static int dummy_enable_phys_dma(struct fw_card *card, |
| 608 | int node_id, int generation) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 609 | { |
| 610 | return -ENODEV; |
| 611 | } |
| 612 | |
Stefan Richter | 2080222 | 2010-08-01 12:23:14 +0200 | [diff] [blame] | 613 | static struct fw_iso_context *dummy_allocate_iso_context(struct fw_card *card, |
| 614 | int type, int channel, size_t header_size) |
| 615 | { |
| 616 | return ERR_PTR(-ENODEV); |
| 617 | } |
| 618 | |
Hector Martin | e70b669 | 2022-04-05 16:22:19 +0900 | [diff] [blame] | 619 | static u32 dummy_read_csr(struct fw_card *card, int csr_offset) |
| 620 | { |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static void dummy_write_csr(struct fw_card *card, int csr_offset, u32 value) |
| 625 | { |
| 626 | } |
| 627 | |
Stefan Richter | 2080222 | 2010-08-01 12:23:14 +0200 | [diff] [blame] | 628 | static int dummy_start_iso(struct fw_iso_context *ctx, |
| 629 | s32 cycle, u32 sync, u32 tags) |
| 630 | { |
| 631 | return -ENODEV; |
| 632 | } |
| 633 | |
| 634 | static int dummy_set_iso_channels(struct fw_iso_context *ctx, u64 *channels) |
| 635 | { |
| 636 | return -ENODEV; |
| 637 | } |
| 638 | |
| 639 | static int dummy_queue_iso(struct fw_iso_context *ctx, struct fw_iso_packet *p, |
| 640 | struct fw_iso_buffer *buffer, unsigned long payload) |
| 641 | { |
| 642 | return -ENODEV; |
| 643 | } |
| 644 | |
Clemens Ladisch | 13882a8 | 2011-05-02 09:33:56 +0200 | [diff] [blame] | 645 | static void dummy_flush_queue_iso(struct fw_iso_context *ctx) |
| 646 | { |
| 647 | } |
| 648 | |
Clemens Ladisch | d1bbd20 | 2012-03-18 19:06:39 +0100 | [diff] [blame] | 649 | static int dummy_flush_iso_completions(struct fw_iso_context *ctx) |
| 650 | { |
| 651 | return -ENODEV; |
| 652 | } |
| 653 | |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 654 | static const struct fw_card_driver dummy_driver_template = { |
Stefan Richter | 2080222 | 2010-08-01 12:23:14 +0200 | [diff] [blame] | 655 | .read_phy_reg = dummy_read_phy_reg, |
| 656 | .update_phy_reg = dummy_update_phy_reg, |
| 657 | .send_request = dummy_send_request, |
| 658 | .send_response = dummy_send_response, |
| 659 | .cancel_packet = dummy_cancel_packet, |
| 660 | .enable_phys_dma = dummy_enable_phys_dma, |
Hector Martin | e70b669 | 2022-04-05 16:22:19 +0900 | [diff] [blame] | 661 | .read_csr = dummy_read_csr, |
| 662 | .write_csr = dummy_write_csr, |
Stefan Richter | 2080222 | 2010-08-01 12:23:14 +0200 | [diff] [blame] | 663 | .allocate_iso_context = dummy_allocate_iso_context, |
| 664 | .start_iso = dummy_start_iso, |
| 665 | .set_iso_channels = dummy_set_iso_channels, |
| 666 | .queue_iso = dummy_queue_iso, |
Clemens Ladisch | 13882a8 | 2011-05-02 09:33:56 +0200 | [diff] [blame] | 667 | .flush_queue_iso = dummy_flush_queue_iso, |
Clemens Ladisch | d1bbd20 | 2012-03-18 19:06:39 +0100 | [diff] [blame] | 668 | .flush_iso_completions = dummy_flush_iso_completions, |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 669 | }; |
| 670 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 671 | void fw_card_release(struct kref *kref) |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 672 | { |
| 673 | struct fw_card *card = container_of(kref, struct fw_card, kref); |
| 674 | |
| 675 | complete(&card->done); |
| 676 | } |
Chris Boot | fc5f80b | 2012-02-01 22:36:02 +0000 | [diff] [blame] | 677 | EXPORT_SYMBOL_GPL(fw_card_release); |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 678 | |
Stefan Richter | 53dca51 | 2008-12-14 21:47:04 +0100 | [diff] [blame] | 679 | void fw_core_remove_card(struct fw_card *card) |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 680 | { |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 681 | struct fw_card_driver dummy_driver = dummy_driver_template; |
Niels Dossche | a7ecbe9 | 2022-04-09 13:12:43 +0900 | [diff] [blame] | 682 | unsigned long flags; |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 683 | |
Marc Butler | ecab413 | 2007-03-23 10:24:02 -0600 | [diff] [blame] | 684 | card->driver->update_phy_reg(card, 4, |
| 685 | PHY_LINK_ACTIVE | PHY_CONTENDER, 0); |
Stefan Richter | 02d37be | 2010-07-08 16:09:06 +0200 | [diff] [blame] | 686 | fw_schedule_bus_reset(card, false, true); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 687 | |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 688 | mutex_lock(&card_mutex); |
Stefan Richter | e747a5c | 2009-01-24 20:35:38 +0100 | [diff] [blame] | 689 | list_del_init(&card->link); |
Kristian Høgsberg | 6a5033b | 2007-05-07 20:33:33 -0400 | [diff] [blame] | 690 | mutex_unlock(&card_mutex); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 691 | |
Stefan Richter | d645f4d | 2009-06-16 19:15:25 +0200 | [diff] [blame] | 692 | /* Switch off most of the card driver interface. */ |
| 693 | dummy_driver.free_iso_context = card->driver->free_iso_context; |
| 694 | dummy_driver.stop_iso = card->driver->stop_iso; |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 695 | card->driver = &dummy_driver; |
| 696 | |
Niels Dossche | a7ecbe9 | 2022-04-09 13:12:43 +0900 | [diff] [blame] | 697 | spin_lock_irqsave(&card->lock, flags); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 698 | fw_destroy_nodes(card); |
Niels Dossche | a7ecbe9 | 2022-04-09 13:12:43 +0900 | [diff] [blame] | 699 | spin_unlock_irqrestore(&card->lock, flags); |
Stefan Richter | 459f792 | 2008-05-24 16:50:22 +0200 | [diff] [blame] | 700 | |
| 701 | /* Wait for all users, especially device workqueue jobs, to finish. */ |
| 702 | fw_card_put(card); |
| 703 | wait_for_completion(&card->done); |
Stefan Richter | 8a2d9ed | 2007-08-21 01:05:14 +0200 | [diff] [blame] | 704 | |
Stefan Richter | 1e8afea | 2008-07-12 14:51:18 +0200 | [diff] [blame] | 705 | WARN_ON(!list_empty(&card->transaction_list)); |
Kristian Høgsberg | 3038e35 | 2006-12-19 19:58:27 -0500 | [diff] [blame] | 706 | } |
| 707 | EXPORT_SYMBOL(fw_core_remove_card); |
Takashi Sakamoto | baa914c | 2022-04-05 16:22:20 +0900 | [diff] [blame] | 708 | |
| 709 | /** |
| 710 | * fw_card_read_cycle_time: read from Isochronous Cycle Timer Register of 1394 OHCI in MMIO region |
| 711 | * for controller card. |
| 712 | * @card: The instance of card for 1394 OHCI controller. |
| 713 | * @cycle_time: The mutual reference to value of cycle time for the read operation. |
| 714 | * |
| 715 | * Read value from Isochronous Cycle Timer Register of 1394 OHCI in MMIO region for the given |
| 716 | * controller card. This function accesses the region without any lock primitives or IRQ mask. |
| 717 | * When returning successfully, the content of @value argument has value aligned to host endianness, |
| 718 | * formetted by CYCLE_TIME CSR Register of IEEE 1394 std. |
| 719 | * |
| 720 | * Context: Any context. |
| 721 | * Return: |
| 722 | * * 0 - Read successfully. |
| 723 | * * -ENODEV - The controller is unavailable due to being removed or unbound. |
| 724 | */ |
| 725 | int fw_card_read_cycle_time(struct fw_card *card, u32 *cycle_time) |
| 726 | { |
| 727 | if (card->driver->read_csr == dummy_read_csr) |
| 728 | return -ENODEV; |
| 729 | |
| 730 | // It's possible to switch to dummy driver between the above and the below. This is the best |
| 731 | // effort to return -ENODEV. |
| 732 | *cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
| 733 | return 0; |
| 734 | } |
| 735 | EXPORT_SYMBOL_GPL(fw_card_read_cycle_time); |