josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Filename: core.c |
| 3 | * |
| 4 | * |
| 5 | * Authors: Joshua Morris <josh.h.morris@us.ibm.com> |
| 6 | * Philip Kelleher <pjk1939@linux.vnet.ibm.com> |
| 7 | * |
| 8 | * (C) Copyright 2013 IBM Corporation |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of the |
| 13 | * License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, but |
| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software Foundation, |
| 22 | * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | */ |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/pci.h> |
| 30 | #include <linux/reboot.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/bitops.h> |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 33 | #include <linux/delay.h> |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 34 | #include <linux/debugfs.h> |
| 35 | #include <linux/seq_file.h> |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 36 | |
| 37 | #include <linux/genhd.h> |
| 38 | #include <linux/idr.h> |
| 39 | |
| 40 | #include "rsxx_priv.h" |
| 41 | #include "rsxx_cfg.h" |
| 42 | |
| 43 | #define NO_LEGACY 0 |
Philip J Kelleher | fb065cd | 2013-06-18 14:42:36 -0500 | [diff] [blame] | 44 | #define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */ |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 45 | |
Philip J Kelleher | f730e3d | 2013-06-18 14:43:58 -0500 | [diff] [blame] | 46 | MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver"); |
Philip J Kelleher | 9bb3c44 | 2013-02-27 09:24:59 -0600 | [diff] [blame] | 47 | MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM"); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 48 | MODULE_LICENSE("GPL"); |
| 49 | MODULE_VERSION(DRIVER_VERSION); |
| 50 | |
| 51 | static unsigned int force_legacy = NO_LEGACY; |
| 52 | module_param(force_legacy, uint, 0444); |
| 53 | MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts"); |
| 54 | |
Philip J Kelleher | fb065cd | 2013-06-18 14:42:36 -0500 | [diff] [blame] | 55 | static unsigned int sync_start = 1; |
| 56 | module_param(sync_start, uint, 0444); |
| 57 | MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete " |
| 58 | "until the card startup has completed."); |
| 59 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 60 | static DEFINE_IDA(rsxx_disk_ida); |
| 61 | static DEFINE_SPINLOCK(rsxx_ida_lock); |
| 62 | |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 63 | /* --------------------Debugfs Setup ------------------- */ |
| 64 | |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 65 | static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p) |
| 66 | { |
| 67 | struct rsxx_cardinfo *card = m->private; |
| 68 | |
| 69 | seq_printf(m, "HWID 0x%08x\n", |
| 70 | ioread32(card->regmap + HWID)); |
| 71 | seq_printf(m, "SCRATCH 0x%08x\n", |
| 72 | ioread32(card->regmap + SCRATCH)); |
| 73 | seq_printf(m, "IER 0x%08x\n", |
| 74 | ioread32(card->regmap + IER)); |
| 75 | seq_printf(m, "IPR 0x%08x\n", |
| 76 | ioread32(card->regmap + IPR)); |
| 77 | seq_printf(m, "CREG_CMD 0x%08x\n", |
| 78 | ioread32(card->regmap + CREG_CMD)); |
| 79 | seq_printf(m, "CREG_ADD 0x%08x\n", |
| 80 | ioread32(card->regmap + CREG_ADD)); |
| 81 | seq_printf(m, "CREG_CNT 0x%08x\n", |
| 82 | ioread32(card->regmap + CREG_CNT)); |
| 83 | seq_printf(m, "CREG_STAT 0x%08x\n", |
| 84 | ioread32(card->regmap + CREG_STAT)); |
| 85 | seq_printf(m, "CREG_DATA0 0x%08x\n", |
| 86 | ioread32(card->regmap + CREG_DATA0)); |
| 87 | seq_printf(m, "CREG_DATA1 0x%08x\n", |
| 88 | ioread32(card->regmap + CREG_DATA1)); |
| 89 | seq_printf(m, "CREG_DATA2 0x%08x\n", |
| 90 | ioread32(card->regmap + CREG_DATA2)); |
| 91 | seq_printf(m, "CREG_DATA3 0x%08x\n", |
| 92 | ioread32(card->regmap + CREG_DATA3)); |
| 93 | seq_printf(m, "CREG_DATA4 0x%08x\n", |
| 94 | ioread32(card->regmap + CREG_DATA4)); |
| 95 | seq_printf(m, "CREG_DATA5 0x%08x\n", |
| 96 | ioread32(card->regmap + CREG_DATA5)); |
| 97 | seq_printf(m, "CREG_DATA6 0x%08x\n", |
| 98 | ioread32(card->regmap + CREG_DATA6)); |
| 99 | seq_printf(m, "CREG_DATA7 0x%08x\n", |
| 100 | ioread32(card->regmap + CREG_DATA7)); |
| 101 | seq_printf(m, "INTR_COAL 0x%08x\n", |
| 102 | ioread32(card->regmap + INTR_COAL)); |
| 103 | seq_printf(m, "HW_ERROR 0x%08x\n", |
| 104 | ioread32(card->regmap + HW_ERROR)); |
| 105 | seq_printf(m, "DEBUG0 0x%08x\n", |
| 106 | ioread32(card->regmap + PCI_DEBUG0)); |
| 107 | seq_printf(m, "DEBUG1 0x%08x\n", |
| 108 | ioread32(card->regmap + PCI_DEBUG1)); |
| 109 | seq_printf(m, "DEBUG2 0x%08x\n", |
| 110 | ioread32(card->regmap + PCI_DEBUG2)); |
| 111 | seq_printf(m, "DEBUG3 0x%08x\n", |
| 112 | ioread32(card->regmap + PCI_DEBUG3)); |
| 113 | seq_printf(m, "DEBUG4 0x%08x\n", |
| 114 | ioread32(card->regmap + PCI_DEBUG4)); |
| 115 | seq_printf(m, "DEBUG5 0x%08x\n", |
| 116 | ioread32(card->regmap + PCI_DEBUG5)); |
| 117 | seq_printf(m, "DEBUG6 0x%08x\n", |
| 118 | ioread32(card->regmap + PCI_DEBUG6)); |
| 119 | seq_printf(m, "DEBUG7 0x%08x\n", |
| 120 | ioread32(card->regmap + PCI_DEBUG7)); |
| 121 | seq_printf(m, "RECONFIG 0x%08x\n", |
| 122 | ioread32(card->regmap + PCI_RECONFIG)); |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | static int rsxx_attr_stats_show(struct seq_file *m, void *p) |
| 128 | { |
| 129 | struct rsxx_cardinfo *card = m->private; |
| 130 | int i; |
| 131 | |
| 132 | for (i = 0; i < card->n_targets; i++) { |
| 133 | seq_printf(m, "Ctrl %d CRC Errors = %d\n", |
| 134 | i, card->ctrl[i].stats.crc_errors); |
| 135 | seq_printf(m, "Ctrl %d Hard Errors = %d\n", |
| 136 | i, card->ctrl[i].stats.hard_errors); |
| 137 | seq_printf(m, "Ctrl %d Soft Errors = %d\n", |
| 138 | i, card->ctrl[i].stats.soft_errors); |
| 139 | seq_printf(m, "Ctrl %d Writes Issued = %d\n", |
| 140 | i, card->ctrl[i].stats.writes_issued); |
| 141 | seq_printf(m, "Ctrl %d Writes Failed = %d\n", |
| 142 | i, card->ctrl[i].stats.writes_failed); |
| 143 | seq_printf(m, "Ctrl %d Reads Issued = %d\n", |
| 144 | i, card->ctrl[i].stats.reads_issued); |
| 145 | seq_printf(m, "Ctrl %d Reads Failed = %d\n", |
| 146 | i, card->ctrl[i].stats.reads_failed); |
| 147 | seq_printf(m, "Ctrl %d Reads Retried = %d\n", |
| 148 | i, card->ctrl[i].stats.reads_retried); |
| 149 | seq_printf(m, "Ctrl %d Discards Issued = %d\n", |
| 150 | i, card->ctrl[i].stats.discards_issued); |
| 151 | seq_printf(m, "Ctrl %d Discards Failed = %d\n", |
| 152 | i, card->ctrl[i].stats.discards_failed); |
| 153 | seq_printf(m, "Ctrl %d DMA SW Errors = %d\n", |
| 154 | i, card->ctrl[i].stats.dma_sw_err); |
| 155 | seq_printf(m, "Ctrl %d DMA HW Faults = %d\n", |
| 156 | i, card->ctrl[i].stats.dma_hw_fault); |
| 157 | seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n", |
| 158 | i, card->ctrl[i].stats.dma_cancelled); |
| 159 | seq_printf(m, "Ctrl %d SW Queue Depth = %d\n", |
| 160 | i, card->ctrl[i].stats.sw_q_depth); |
| 161 | seq_printf(m, "Ctrl %d HW Queue Depth = %d\n", |
| 162 | i, atomic_read(&card->ctrl[i].stats.hw_q_depth)); |
| 163 | } |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | static int rsxx_attr_stats_open(struct inode *inode, struct file *file) |
| 169 | { |
| 170 | return single_open(file, rsxx_attr_stats_show, inode->i_private); |
| 171 | } |
| 172 | |
| 173 | static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file) |
| 174 | { |
| 175 | return single_open(file, rsxx_attr_pci_regs_show, inode->i_private); |
| 176 | } |
| 177 | |
| 178 | static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf, |
| 179 | size_t cnt, loff_t *ppos) |
| 180 | { |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 181 | struct rsxx_cardinfo *card = file_inode(fp)->i_private; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 182 | char *buf; |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 183 | ssize_t st; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 184 | |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 185 | buf = kzalloc(cnt, GFP_KERNEL); |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 186 | if (!buf) |
| 187 | return -ENOMEM; |
| 188 | |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 189 | st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1); |
| 190 | if (!st) |
| 191 | st = copy_to_user(ubuf, buf, cnt); |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 192 | kfree(buf); |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 193 | if (st) |
| 194 | return st; |
| 195 | *ppos += cnt; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 196 | return cnt; |
| 197 | } |
| 198 | |
| 199 | static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf, |
| 200 | size_t cnt, loff_t *ppos) |
| 201 | { |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 202 | struct rsxx_cardinfo *card = file_inode(fp)->i_private; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 203 | char *buf; |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 204 | ssize_t st; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 205 | |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 206 | buf = kzalloc(cnt, GFP_KERNEL); |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 207 | if (!buf) |
| 208 | return -ENOMEM; |
| 209 | |
| 210 | st = copy_from_user(buf, ubuf, cnt); |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 211 | if (!st) |
| 212 | st = rsxx_creg_write(card, CREG_ADD_CRAM + (u32)*ppos, cnt, |
| 213 | buf, 1); |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 214 | kfree(buf); |
Al Viro | 8e3fb05 | 2014-08-19 14:42:04 -0400 | [diff] [blame] | 215 | if (st) |
| 216 | return st; |
| 217 | *ppos += cnt; |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 218 | return cnt; |
| 219 | } |
| 220 | |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 221 | static const struct file_operations debugfs_cram_fops = { |
| 222 | .owner = THIS_MODULE, |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 223 | .read = rsxx_cram_read, |
| 224 | .write = rsxx_cram_write, |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 225 | }; |
| 226 | |
| 227 | static const struct file_operations debugfs_stats_fops = { |
| 228 | .owner = THIS_MODULE, |
| 229 | .open = rsxx_attr_stats_open, |
| 230 | .read = seq_read, |
| 231 | .llseek = seq_lseek, |
| 232 | .release = single_release, |
| 233 | }; |
| 234 | |
| 235 | static const struct file_operations debugfs_pci_regs_fops = { |
| 236 | .owner = THIS_MODULE, |
| 237 | .open = rsxx_attr_pci_regs_open, |
| 238 | .read = seq_read, |
| 239 | .llseek = seq_lseek, |
| 240 | .release = single_release, |
| 241 | }; |
| 242 | |
| 243 | static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card) |
| 244 | { |
| 245 | struct dentry *debugfs_stats; |
| 246 | struct dentry *debugfs_pci_regs; |
| 247 | struct dentry *debugfs_cram; |
| 248 | |
| 249 | card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL); |
| 250 | if (IS_ERR_OR_NULL(card->debugfs_dir)) |
| 251 | goto failed_debugfs_dir; |
| 252 | |
| 253 | debugfs_stats = debugfs_create_file("stats", S_IRUGO, |
| 254 | card->debugfs_dir, card, |
| 255 | &debugfs_stats_fops); |
| 256 | if (IS_ERR_OR_NULL(debugfs_stats)) |
| 257 | goto failed_debugfs_stats; |
| 258 | |
| 259 | debugfs_pci_regs = debugfs_create_file("pci_regs", S_IRUGO, |
| 260 | card->debugfs_dir, card, |
| 261 | &debugfs_pci_regs_fops); |
| 262 | if (IS_ERR_OR_NULL(debugfs_pci_regs)) |
| 263 | goto failed_debugfs_pci_regs; |
| 264 | |
| 265 | debugfs_cram = debugfs_create_file("cram", S_IRUGO | S_IWUSR, |
| 266 | card->debugfs_dir, card, |
| 267 | &debugfs_cram_fops); |
| 268 | if (IS_ERR_OR_NULL(debugfs_cram)) |
| 269 | goto failed_debugfs_cram; |
| 270 | |
| 271 | return; |
| 272 | failed_debugfs_cram: |
| 273 | debugfs_remove(debugfs_pci_regs); |
| 274 | failed_debugfs_pci_regs: |
| 275 | debugfs_remove(debugfs_stats); |
| 276 | failed_debugfs_stats: |
| 277 | debugfs_remove(card->debugfs_dir); |
| 278 | failed_debugfs_dir: |
| 279 | card->debugfs_dir = NULL; |
| 280 | } |
| 281 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 282 | /*----------------- Interrupt Control & Handling -------------------*/ |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 283 | |
| 284 | static void rsxx_mask_interrupts(struct rsxx_cardinfo *card) |
| 285 | { |
| 286 | card->isr_mask = 0; |
| 287 | card->ier_mask = 0; |
| 288 | } |
| 289 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 290 | static void __enable_intr(unsigned int *mask, unsigned int intr) |
| 291 | { |
| 292 | *mask |= intr; |
| 293 | } |
| 294 | |
| 295 | static void __disable_intr(unsigned int *mask, unsigned int intr) |
| 296 | { |
| 297 | *mask &= ~intr; |
| 298 | } |
| 299 | |
| 300 | /* |
| 301 | * NOTE: Disabling the IER will disable the hardware interrupt. |
| 302 | * Disabling the ISR will disable the software handling of the ISR bit. |
| 303 | * |
| 304 | * Enable/Disable interrupt functions assume the card->irq_lock |
| 305 | * is held by the caller. |
| 306 | */ |
| 307 | void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr) |
| 308 | { |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 309 | if (unlikely(card->halt) || |
| 310 | unlikely(card->eeh_state)) |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 311 | return; |
| 312 | |
| 313 | __enable_intr(&card->ier_mask, intr); |
| 314 | iowrite32(card->ier_mask, card->regmap + IER); |
| 315 | } |
| 316 | |
| 317 | void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr) |
| 318 | { |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 319 | if (unlikely(card->eeh_state)) |
| 320 | return; |
| 321 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 322 | __disable_intr(&card->ier_mask, intr); |
| 323 | iowrite32(card->ier_mask, card->regmap + IER); |
| 324 | } |
| 325 | |
| 326 | void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card, |
| 327 | unsigned int intr) |
| 328 | { |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 329 | if (unlikely(card->halt) || |
| 330 | unlikely(card->eeh_state)) |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 331 | return; |
| 332 | |
| 333 | __enable_intr(&card->isr_mask, intr); |
| 334 | __enable_intr(&card->ier_mask, intr); |
| 335 | iowrite32(card->ier_mask, card->regmap + IER); |
| 336 | } |
| 337 | void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card, |
| 338 | unsigned int intr) |
| 339 | { |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 340 | if (unlikely(card->eeh_state)) |
| 341 | return; |
| 342 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 343 | __disable_intr(&card->isr_mask, intr); |
| 344 | __disable_intr(&card->ier_mask, intr); |
| 345 | iowrite32(card->ier_mask, card->regmap + IER); |
| 346 | } |
| 347 | |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 348 | static irqreturn_t rsxx_isr(int irq, void *pdata) |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 349 | { |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 350 | struct rsxx_cardinfo *card = pdata; |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 351 | unsigned int isr; |
| 352 | int handled = 0; |
| 353 | int reread_isr; |
| 354 | int i; |
| 355 | |
| 356 | spin_lock(&card->irq_lock); |
| 357 | |
| 358 | do { |
| 359 | reread_isr = 0; |
| 360 | |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 361 | if (unlikely(card->eeh_state)) |
| 362 | break; |
| 363 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 364 | isr = ioread32(card->regmap + ISR); |
| 365 | if (isr == 0xffffffff) { |
| 366 | /* |
| 367 | * A few systems seem to have an intermittent issue |
| 368 | * where PCI reads return all Fs, but retrying the read |
| 369 | * a little later will return as expected. |
| 370 | */ |
| 371 | dev_info(CARD_TO_DEV(card), |
| 372 | "ISR = 0xFFFFFFFF, retrying later\n"); |
| 373 | break; |
| 374 | } |
| 375 | |
| 376 | isr &= card->isr_mask; |
| 377 | if (!isr) |
| 378 | break; |
| 379 | |
| 380 | for (i = 0; i < card->n_targets; i++) { |
| 381 | if (isr & CR_INTR_DMA(i)) { |
| 382 | if (card->ier_mask & CR_INTR_DMA(i)) { |
| 383 | rsxx_disable_ier(card, CR_INTR_DMA(i)); |
| 384 | reread_isr = 1; |
| 385 | } |
| 386 | queue_work(card->ctrl[i].done_wq, |
| 387 | &card->ctrl[i].dma_done_work); |
| 388 | handled++; |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | if (isr & CR_INTR_CREG) { |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 393 | queue_work(card->creg_ctrl.creg_wq, |
| 394 | &card->creg_ctrl.done_work); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 395 | handled++; |
| 396 | } |
| 397 | |
| 398 | if (isr & CR_INTR_EVENT) { |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 399 | queue_work(card->event_wq, &card->event_work); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 400 | rsxx_disable_ier_and_isr(card, CR_INTR_EVENT); |
| 401 | handled++; |
| 402 | } |
| 403 | } while (reread_isr); |
| 404 | |
| 405 | spin_unlock(&card->irq_lock); |
| 406 | |
| 407 | return handled ? IRQ_HANDLED : IRQ_NONE; |
| 408 | } |
| 409 | |
| 410 | /*----------------- Card Event Handler -------------------*/ |
Philip J Kelleher | f379120 | 2013-02-25 12:27:46 -0600 | [diff] [blame] | 411 | static const char * const rsxx_card_state_to_str(unsigned int state) |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 412 | { |
Philip J Kelleher | f379120 | 2013-02-25 12:27:46 -0600 | [diff] [blame] | 413 | static const char * const state_strings[] = { |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 414 | "Unknown", "Shutdown", "Starting", "Formatting", |
| 415 | "Uninitialized", "Good", "Shutting Down", |
| 416 | "Fault", "Read Only Fault", "dStroying" |
| 417 | }; |
| 418 | |
| 419 | return state_strings[ffs(state)]; |
| 420 | } |
| 421 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 422 | static void card_state_change(struct rsxx_cardinfo *card, |
| 423 | unsigned int new_state) |
| 424 | { |
| 425 | int st; |
| 426 | |
| 427 | dev_info(CARD_TO_DEV(card), |
| 428 | "card state change detected.(%s -> %s)\n", |
| 429 | rsxx_card_state_to_str(card->state), |
| 430 | rsxx_card_state_to_str(new_state)); |
| 431 | |
| 432 | card->state = new_state; |
| 433 | |
| 434 | /* Don't attach DMA interfaces if the card has an invalid config */ |
| 435 | if (!card->config_valid) |
| 436 | return; |
| 437 | |
| 438 | switch (new_state) { |
| 439 | case CARD_STATE_RD_ONLY_FAULT: |
| 440 | dev_crit(CARD_TO_DEV(card), |
| 441 | "Hardware has entered read-only mode!\n"); |
| 442 | /* |
| 443 | * Fall through so the DMA devices can be attached and |
| 444 | * the user can attempt to pull off their data. |
| 445 | */ |
| 446 | case CARD_STATE_GOOD: |
| 447 | st = rsxx_get_card_size8(card, &card->size8); |
| 448 | if (st) |
| 449 | dev_err(CARD_TO_DEV(card), |
| 450 | "Failed attaching DMA devices\n"); |
| 451 | |
| 452 | if (card->config_valid) |
| 453 | set_capacity(card->gendisk, card->size8 >> 9); |
| 454 | break; |
| 455 | |
| 456 | case CARD_STATE_FAULT: |
| 457 | dev_crit(CARD_TO_DEV(card), |
| 458 | "Hardware Fault reported!\n"); |
| 459 | /* Fall through. */ |
| 460 | |
| 461 | /* Everything else, detach DMA interface if it's attached. */ |
| 462 | case CARD_STATE_SHUTDOWN: |
| 463 | case CARD_STATE_STARTING: |
| 464 | case CARD_STATE_FORMATTING: |
| 465 | case CARD_STATE_UNINITIALIZED: |
| 466 | case CARD_STATE_SHUTTING_DOWN: |
| 467 | /* |
| 468 | * dStroy is a term coined by marketing to represent the low level |
| 469 | * secure erase. |
| 470 | */ |
| 471 | case CARD_STATE_DSTROYING: |
| 472 | set_capacity(card->gendisk, 0); |
| 473 | break; |
| 474 | } |
| 475 | } |
| 476 | |
| 477 | static void card_event_handler(struct work_struct *work) |
| 478 | { |
| 479 | struct rsxx_cardinfo *card; |
| 480 | unsigned int state; |
| 481 | unsigned long flags; |
| 482 | int st; |
| 483 | |
| 484 | card = container_of(work, struct rsxx_cardinfo, event_work); |
| 485 | |
| 486 | if (unlikely(card->halt)) |
| 487 | return; |
| 488 | |
| 489 | /* |
| 490 | * Enable the interrupt now to avoid any weird race conditions where a |
| 491 | * state change might occur while rsxx_get_card_state() is |
| 492 | * processing a returned creg cmd. |
| 493 | */ |
| 494 | spin_lock_irqsave(&card->irq_lock, flags); |
| 495 | rsxx_enable_ier_and_isr(card, CR_INTR_EVENT); |
| 496 | spin_unlock_irqrestore(&card->irq_lock, flags); |
| 497 | |
| 498 | st = rsxx_get_card_state(card, &state); |
| 499 | if (st) { |
| 500 | dev_info(CARD_TO_DEV(card), |
| 501 | "Failed reading state after event.\n"); |
| 502 | return; |
| 503 | } |
| 504 | |
| 505 | if (card->state != state) |
| 506 | card_state_change(card, state); |
| 507 | |
| 508 | if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING) |
| 509 | rsxx_read_hw_log(card); |
| 510 | } |
| 511 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 512 | /*----------------- Card Operations -------------------*/ |
| 513 | static int card_shutdown(struct rsxx_cardinfo *card) |
| 514 | { |
| 515 | unsigned int state; |
| 516 | signed long start; |
| 517 | const int timeout = msecs_to_jiffies(120000); |
| 518 | int st; |
| 519 | |
| 520 | /* We can't issue a shutdown if the card is in a transition state */ |
| 521 | start = jiffies; |
| 522 | do { |
| 523 | st = rsxx_get_card_state(card, &state); |
| 524 | if (st) |
| 525 | return st; |
| 526 | } while (state == CARD_STATE_STARTING && |
| 527 | (jiffies - start < timeout)); |
| 528 | |
| 529 | if (state == CARD_STATE_STARTING) |
| 530 | return -ETIMEDOUT; |
| 531 | |
| 532 | /* Only issue a shutdown if we need to */ |
| 533 | if ((state != CARD_STATE_SHUTTING_DOWN) && |
| 534 | (state != CARD_STATE_SHUTDOWN)) { |
| 535 | st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN); |
| 536 | if (st) |
| 537 | return st; |
| 538 | } |
| 539 | |
| 540 | start = jiffies; |
| 541 | do { |
| 542 | st = rsxx_get_card_state(card, &state); |
| 543 | if (st) |
| 544 | return st; |
| 545 | } while (state != CARD_STATE_SHUTDOWN && |
| 546 | (jiffies - start < timeout)); |
| 547 | |
| 548 | if (state != CARD_STATE_SHUTDOWN) |
| 549 | return -ETIMEDOUT; |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 554 | static int rsxx_eeh_frozen(struct pci_dev *dev) |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 555 | { |
| 556 | struct rsxx_cardinfo *card = pci_get_drvdata(dev); |
| 557 | int i; |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 558 | int st; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 559 | |
Philip J Kelleher | f730e3d | 2013-06-18 14:43:58 -0500 | [diff] [blame] | 560 | dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n"); |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 561 | |
| 562 | card->eeh_state = 1; |
| 563 | rsxx_mask_interrupts(card); |
| 564 | |
| 565 | /* |
| 566 | * We need to guarantee that the write for eeh_state and masking |
| 567 | * interrupts does not become reordered. This will prevent a possible |
| 568 | * race condition with the EEH code. |
| 569 | */ |
| 570 | wmb(); |
| 571 | |
| 572 | pci_disable_device(dev); |
| 573 | |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 574 | st = rsxx_eeh_save_issued_dmas(card); |
| 575 | if (st) |
| 576 | return st; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 577 | |
| 578 | rsxx_eeh_save_issued_creg(card); |
| 579 | |
| 580 | for (i = 0; i < card->n_targets; i++) { |
| 581 | if (card->ctrl[i].status.buf) |
| 582 | pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8, |
| 583 | card->ctrl[i].status.buf, |
| 584 | card->ctrl[i].status.dma_addr); |
| 585 | if (card->ctrl[i].cmd.buf) |
| 586 | pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8, |
| 587 | card->ctrl[i].cmd.buf, |
| 588 | card->ctrl[i].cmd.dma_addr); |
| 589 | } |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 590 | |
| 591 | return 0; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 592 | } |
| 593 | |
| 594 | static void rsxx_eeh_failure(struct pci_dev *dev) |
| 595 | { |
| 596 | struct rsxx_cardinfo *card = pci_get_drvdata(dev); |
| 597 | int i; |
Philip J Kelleher | 0ab4743 | 2013-06-18 14:36:26 -0500 | [diff] [blame] | 598 | int cnt = 0; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 599 | |
Philip J Kelleher | f730e3d | 2013-06-18 14:43:58 -0500 | [diff] [blame] | 600 | dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n"); |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 601 | |
| 602 | card->eeh_state = 1; |
Philip J Kelleher | 0ab4743 | 2013-06-18 14:36:26 -0500 | [diff] [blame] | 603 | card->halt = 1; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 604 | |
Philip J Kelleher | 0ab4743 | 2013-06-18 14:36:26 -0500 | [diff] [blame] | 605 | for (i = 0; i < card->n_targets; i++) { |
| 606 | spin_lock_bh(&card->ctrl[i].queue_lock); |
| 607 | cnt = rsxx_cleanup_dma_queue(&card->ctrl[i], |
Philip J Kelleher | e5feab2 | 2013-09-04 13:59:02 -0500 | [diff] [blame] | 608 | &card->ctrl[i].queue, |
| 609 | COMPLETE_DMA); |
Philip J Kelleher | 0ab4743 | 2013-06-18 14:36:26 -0500 | [diff] [blame] | 610 | spin_unlock_bh(&card->ctrl[i].queue_lock); |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 611 | |
Philip J Kelleher | 0ab4743 | 2013-06-18 14:36:26 -0500 | [diff] [blame] | 612 | cnt += rsxx_dma_cancel(&card->ctrl[i]); |
| 613 | |
| 614 | if (cnt) |
| 615 | dev_info(CARD_TO_DEV(card), |
| 616 | "Freed %d queued DMAs on channel %d\n", |
| 617 | cnt, card->ctrl[i].id); |
| 618 | } |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 619 | } |
| 620 | |
| 621 | static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card) |
| 622 | { |
| 623 | unsigned int status; |
| 624 | int iter = 0; |
| 625 | |
| 626 | /* We need to wait for the hardware to reset */ |
| 627 | while (iter++ < 10) { |
| 628 | status = ioread32(card->regmap + PCI_RECONFIG); |
| 629 | |
| 630 | if (status & RSXX_FLUSH_BUSY) { |
| 631 | ssleep(1); |
| 632 | continue; |
| 633 | } |
| 634 | |
| 635 | if (status & RSXX_FLUSH_TIMEOUT) |
| 636 | dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n"); |
| 637 | return 0; |
| 638 | } |
| 639 | |
| 640 | /* Hardware failed resetting itself. */ |
| 641 | return -1; |
| 642 | } |
| 643 | |
| 644 | static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev, |
| 645 | enum pci_channel_state error) |
| 646 | { |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 647 | int st; |
| 648 | |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 649 | if (dev->revision < RSXX_EEH_SUPPORT) |
| 650 | return PCI_ERS_RESULT_NONE; |
| 651 | |
| 652 | if (error == pci_channel_io_perm_failure) { |
| 653 | rsxx_eeh_failure(dev); |
| 654 | return PCI_ERS_RESULT_DISCONNECT; |
| 655 | } |
| 656 | |
Philip J Kelleher | 4dcaf47 | 2013-03-26 11:03:07 -0500 | [diff] [blame] | 657 | st = rsxx_eeh_frozen(dev); |
| 658 | if (st) { |
| 659 | dev_err(&dev->dev, "Slot reset setup failed\n"); |
| 660 | rsxx_eeh_failure(dev); |
| 661 | return PCI_ERS_RESULT_DISCONNECT; |
| 662 | } |
| 663 | |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 664 | return PCI_ERS_RESULT_NEED_RESET; |
| 665 | } |
| 666 | |
| 667 | static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev) |
| 668 | { |
| 669 | struct rsxx_cardinfo *card = pci_get_drvdata(dev); |
| 670 | unsigned long flags; |
| 671 | int i; |
| 672 | int st; |
| 673 | |
| 674 | dev_warn(&dev->dev, |
Philip J Kelleher | f730e3d | 2013-06-18 14:43:58 -0500 | [diff] [blame] | 675 | "IBM Flash Adapter PCI: recovering from slot reset.\n"); |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 676 | |
| 677 | st = pci_enable_device(dev); |
| 678 | if (st) |
| 679 | goto failed_hw_setup; |
| 680 | |
| 681 | pci_set_master(dev); |
| 682 | |
| 683 | st = rsxx_eeh_fifo_flush_poll(card); |
| 684 | if (st) |
| 685 | goto failed_hw_setup; |
| 686 | |
| 687 | rsxx_dma_queue_reset(card); |
| 688 | |
| 689 | for (i = 0; i < card->n_targets; i++) { |
| 690 | st = rsxx_hw_buffers_init(dev, &card->ctrl[i]); |
| 691 | if (st) |
| 692 | goto failed_hw_buffers_init; |
| 693 | } |
| 694 | |
| 695 | if (card->config_valid) |
| 696 | rsxx_dma_configure(card); |
| 697 | |
| 698 | /* Clears the ISR register from spurious interrupts */ |
| 699 | st = ioread32(card->regmap + ISR); |
| 700 | |
| 701 | card->eeh_state = 0; |
| 702 | |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 703 | spin_lock_irqsave(&card->irq_lock, flags); |
| 704 | if (card->n_targets & RSXX_MAX_TARGETS) |
| 705 | rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G); |
| 706 | else |
| 707 | rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C); |
| 708 | spin_unlock_irqrestore(&card->irq_lock, flags); |
| 709 | |
| 710 | rsxx_kick_creg_queue(card); |
| 711 | |
| 712 | for (i = 0; i < card->n_targets; i++) { |
| 713 | spin_lock(&card->ctrl[i].queue_lock); |
| 714 | if (list_empty(&card->ctrl[i].queue)) { |
| 715 | spin_unlock(&card->ctrl[i].queue_lock); |
| 716 | continue; |
| 717 | } |
| 718 | spin_unlock(&card->ctrl[i].queue_lock); |
| 719 | |
| 720 | queue_work(card->ctrl[i].issue_wq, |
| 721 | &card->ctrl[i].issue_dma_work); |
| 722 | } |
| 723 | |
Philip J Kelleher | f730e3d | 2013-06-18 14:43:58 -0500 | [diff] [blame] | 724 | dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n"); |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 725 | |
| 726 | return PCI_ERS_RESULT_RECOVERED; |
| 727 | |
| 728 | failed_hw_buffers_init: |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 729 | for (i = 0; i < card->n_targets; i++) { |
| 730 | if (card->ctrl[i].status.buf) |
| 731 | pci_free_consistent(card->dev, |
| 732 | STATUS_BUFFER_SIZE8, |
| 733 | card->ctrl[i].status.buf, |
| 734 | card->ctrl[i].status.dma_addr); |
| 735 | if (card->ctrl[i].cmd.buf) |
| 736 | pci_free_consistent(card->dev, |
| 737 | COMMAND_BUFFER_SIZE8, |
| 738 | card->ctrl[i].cmd.buf, |
| 739 | card->ctrl[i].cmd.dma_addr); |
| 740 | } |
| 741 | failed_hw_setup: |
| 742 | rsxx_eeh_failure(dev); |
| 743 | return PCI_ERS_RESULT_DISCONNECT; |
| 744 | |
| 745 | } |
| 746 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 747 | /*----------------- Driver Initialization & Setup -------------------*/ |
| 748 | /* Returns: 0 if the driver is compatible with the device |
| 749 | -1 if the driver is NOT compatible with the device */ |
| 750 | static int rsxx_compatibility_check(struct rsxx_cardinfo *card) |
| 751 | { |
| 752 | unsigned char pci_rev; |
| 753 | |
| 754 | pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev); |
| 755 | |
| 756 | if (pci_rev > RS70_PCI_REV_SUPPORTED) |
| 757 | return -1; |
| 758 | return 0; |
| 759 | } |
| 760 | |
Stephen Rothwell | 82bed4d | 2013-02-06 14:03:13 +1100 | [diff] [blame] | 761 | static int rsxx_pci_probe(struct pci_dev *dev, |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 762 | const struct pci_device_id *id) |
| 763 | { |
| 764 | struct rsxx_cardinfo *card; |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 765 | int st; |
Philip J Kelleher | fb065cd | 2013-06-18 14:42:36 -0500 | [diff] [blame] | 766 | unsigned int sync_timeout; |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 767 | |
| 768 | dev_info(&dev->dev, "PCI-Flash SSD discovered\n"); |
| 769 | |
| 770 | card = kzalloc(sizeof(*card), GFP_KERNEL); |
| 771 | if (!card) |
| 772 | return -ENOMEM; |
| 773 | |
| 774 | card->dev = dev; |
| 775 | pci_set_drvdata(dev, card); |
| 776 | |
| 777 | do { |
| 778 | if (!ida_pre_get(&rsxx_disk_ida, GFP_KERNEL)) { |
| 779 | st = -ENOMEM; |
| 780 | goto failed_ida_get; |
| 781 | } |
| 782 | |
| 783 | spin_lock(&rsxx_ida_lock); |
| 784 | st = ida_get_new(&rsxx_disk_ida, &card->disk_id); |
| 785 | spin_unlock(&rsxx_ida_lock); |
| 786 | } while (st == -EAGAIN); |
| 787 | |
| 788 | if (st) |
| 789 | goto failed_ida_get; |
| 790 | |
| 791 | st = pci_enable_device(dev); |
| 792 | if (st) |
| 793 | goto failed_enable; |
| 794 | |
| 795 | pci_set_master(dev); |
| 796 | pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE); |
| 797 | |
| 798 | st = pci_set_dma_mask(dev, DMA_BIT_MASK(64)); |
| 799 | if (st) { |
| 800 | dev_err(CARD_TO_DEV(card), |
| 801 | "No usable DMA configuration,aborting\n"); |
| 802 | goto failed_dma_mask; |
| 803 | } |
| 804 | |
| 805 | st = pci_request_regions(dev, DRIVER_NAME); |
| 806 | if (st) { |
| 807 | dev_err(CARD_TO_DEV(card), |
| 808 | "Failed to request memory region\n"); |
| 809 | goto failed_request_regions; |
| 810 | } |
| 811 | |
| 812 | if (pci_resource_len(dev, 0) == 0) { |
| 813 | dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n"); |
| 814 | st = -ENOMEM; |
| 815 | goto failed_iomap; |
| 816 | } |
| 817 | |
| 818 | card->regmap = pci_iomap(dev, 0, 0); |
| 819 | if (!card->regmap) { |
| 820 | dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n"); |
| 821 | st = -ENOMEM; |
| 822 | goto failed_iomap; |
| 823 | } |
| 824 | |
| 825 | spin_lock_init(&card->irq_lock); |
| 826 | card->halt = 0; |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 827 | card->eeh_state = 0; |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 828 | |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 829 | spin_lock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 830 | rsxx_disable_ier_and_isr(card, CR_INTR_ALL); |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 831 | spin_unlock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 832 | |
| 833 | if (!force_legacy) { |
| 834 | st = pci_enable_msi(dev); |
| 835 | if (st) |
| 836 | dev_warn(CARD_TO_DEV(card), |
| 837 | "Failed to enable MSI\n"); |
| 838 | } |
| 839 | |
Michael Opdenacker | baf3781 | 2014-10-01 14:07:39 -0600 | [diff] [blame] | 840 | st = request_irq(dev->irq, rsxx_isr, IRQF_SHARED, |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 841 | DRIVER_NAME, card); |
| 842 | if (st) { |
| 843 | dev_err(CARD_TO_DEV(card), |
| 844 | "Failed requesting IRQ%d\n", dev->irq); |
| 845 | goto failed_irq; |
| 846 | } |
| 847 | |
| 848 | /************* Setup Processor Command Interface *************/ |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 849 | st = rsxx_creg_setup(card); |
| 850 | if (st) { |
| 851 | dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n"); |
| 852 | goto failed_creg_setup; |
| 853 | } |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 854 | |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 855 | spin_lock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 856 | rsxx_enable_ier_and_isr(card, CR_INTR_CREG); |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 857 | spin_unlock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 858 | |
| 859 | st = rsxx_compatibility_check(card); |
| 860 | if (st) { |
| 861 | dev_warn(CARD_TO_DEV(card), |
| 862 | "Incompatible driver detected. Please update the driver.\n"); |
| 863 | st = -EINVAL; |
| 864 | goto failed_compatiblity_check; |
| 865 | } |
| 866 | |
| 867 | /************* Load Card Config *************/ |
| 868 | st = rsxx_load_config(card); |
| 869 | if (st) |
| 870 | dev_err(CARD_TO_DEV(card), |
| 871 | "Failed loading card config\n"); |
| 872 | |
| 873 | /************* Setup DMA Engine *************/ |
| 874 | st = rsxx_get_num_targets(card, &card->n_targets); |
| 875 | if (st) |
| 876 | dev_info(CARD_TO_DEV(card), |
| 877 | "Failed reading the number of DMA targets\n"); |
| 878 | |
| 879 | card->ctrl = kzalloc(card->n_targets * sizeof(*card->ctrl), GFP_KERNEL); |
| 880 | if (!card->ctrl) { |
| 881 | st = -ENOMEM; |
| 882 | goto failed_dma_setup; |
| 883 | } |
| 884 | |
| 885 | st = rsxx_dma_setup(card); |
| 886 | if (st) { |
| 887 | dev_info(CARD_TO_DEV(card), |
| 888 | "Failed to setup DMA engine\n"); |
| 889 | goto failed_dma_setup; |
| 890 | } |
| 891 | |
| 892 | /************* Setup Card Event Handler *************/ |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 893 | card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event"); |
| 894 | if (!card->event_wq) { |
| 895 | dev_err(CARD_TO_DEV(card), "Failed card event setup.\n"); |
| 896 | goto failed_event_handler; |
| 897 | } |
| 898 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 899 | INIT_WORK(&card->event_work, card_event_handler); |
| 900 | |
| 901 | st = rsxx_setup_dev(card); |
| 902 | if (st) |
| 903 | goto failed_create_dev; |
| 904 | |
| 905 | rsxx_get_card_state(card, &card->state); |
| 906 | |
| 907 | dev_info(CARD_TO_DEV(card), |
| 908 | "card state: %s\n", |
| 909 | rsxx_card_state_to_str(card->state)); |
| 910 | |
| 911 | /* |
| 912 | * Now that the DMA Engine and devices have been setup, |
| 913 | * we can enable the event interrupt(it kicks off actions in |
| 914 | * those layers so we couldn't enable it right away.) |
| 915 | */ |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 916 | spin_lock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 917 | rsxx_enable_ier_and_isr(card, CR_INTR_EVENT); |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 918 | spin_unlock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 919 | |
| 920 | if (card->state == CARD_STATE_SHUTDOWN) { |
| 921 | st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP); |
| 922 | if (st) |
| 923 | dev_crit(CARD_TO_DEV(card), |
| 924 | "Failed issuing card startup\n"); |
Philip J Kelleher | fb065cd | 2013-06-18 14:42:36 -0500 | [diff] [blame] | 925 | if (sync_start) { |
| 926 | sync_timeout = SYNC_START_TIMEOUT; |
| 927 | |
| 928 | dev_info(CARD_TO_DEV(card), |
| 929 | "Waiting for card to startup\n"); |
| 930 | |
| 931 | do { |
| 932 | ssleep(1); |
| 933 | sync_timeout--; |
| 934 | |
| 935 | rsxx_get_card_state(card, &card->state); |
| 936 | } while (sync_timeout && |
| 937 | (card->state == CARD_STATE_STARTING)); |
| 938 | |
| 939 | if (card->state == CARD_STATE_STARTING) { |
| 940 | dev_warn(CARD_TO_DEV(card), |
| 941 | "Card startup timed out\n"); |
| 942 | card->size8 = 0; |
| 943 | } else { |
| 944 | dev_info(CARD_TO_DEV(card), |
| 945 | "card state: %s\n", |
| 946 | rsxx_card_state_to_str(card->state)); |
| 947 | st = rsxx_get_card_size8(card, &card->size8); |
| 948 | if (st) |
| 949 | card->size8 = 0; |
| 950 | } |
| 951 | } |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 952 | } else if (card->state == CARD_STATE_GOOD || |
| 953 | card->state == CARD_STATE_RD_ONLY_FAULT) { |
| 954 | st = rsxx_get_card_size8(card, &card->size8); |
| 955 | if (st) |
| 956 | card->size8 = 0; |
| 957 | } |
| 958 | |
| 959 | rsxx_attach_dev(card); |
| 960 | |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 961 | /************* Setup Debugfs *************/ |
| 962 | rsxx_debugfs_dev_new(card); |
| 963 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 964 | return 0; |
| 965 | |
| 966 | failed_create_dev: |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 967 | destroy_workqueue(card->event_wq); |
| 968 | card->event_wq = NULL; |
| 969 | failed_event_handler: |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 970 | rsxx_dma_destroy(card); |
| 971 | failed_dma_setup: |
| 972 | failed_compatiblity_check: |
Philip J Kelleher | a3299ab | 2013-06-18 14:34:54 -0500 | [diff] [blame] | 973 | destroy_workqueue(card->creg_ctrl.creg_wq); |
| 974 | card->creg_ctrl.creg_wq = NULL; |
| 975 | failed_creg_setup: |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 976 | spin_lock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 977 | rsxx_disable_ier_and_isr(card, CR_INTR_ALL); |
Philip J Kelleher | c206c70 | 2013-02-18 21:35:59 +0100 | [diff] [blame] | 978 | spin_unlock_irq(&card->irq_lock); |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 979 | free_irq(dev->irq, card); |
| 980 | if (!force_legacy) |
| 981 | pci_disable_msi(dev); |
| 982 | failed_irq: |
| 983 | pci_iounmap(dev, card->regmap); |
| 984 | failed_iomap: |
| 985 | pci_release_regions(dev); |
| 986 | failed_request_regions: |
| 987 | failed_dma_mask: |
| 988 | pci_disable_device(dev); |
| 989 | failed_enable: |
| 990 | spin_lock(&rsxx_ida_lock); |
| 991 | ida_remove(&rsxx_disk_ida, card->disk_id); |
| 992 | spin_unlock(&rsxx_ida_lock); |
| 993 | failed_ida_get: |
| 994 | kfree(card); |
| 995 | |
| 996 | return st; |
| 997 | } |
| 998 | |
Stephen Rothwell | 82bed4d | 2013-02-06 14:03:13 +1100 | [diff] [blame] | 999 | static void rsxx_pci_remove(struct pci_dev *dev) |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1000 | { |
| 1001 | struct rsxx_cardinfo *card = pci_get_drvdata(dev); |
| 1002 | unsigned long flags; |
| 1003 | int st; |
| 1004 | int i; |
| 1005 | |
| 1006 | if (!card) |
| 1007 | return; |
| 1008 | |
| 1009 | dev_info(CARD_TO_DEV(card), |
| 1010 | "Removing PCI-Flash SSD.\n"); |
| 1011 | |
| 1012 | rsxx_detach_dev(card); |
| 1013 | |
| 1014 | for (i = 0; i < card->n_targets; i++) { |
| 1015 | spin_lock_irqsave(&card->irq_lock, flags); |
| 1016 | rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i)); |
| 1017 | spin_unlock_irqrestore(&card->irq_lock, flags); |
| 1018 | } |
| 1019 | |
| 1020 | st = card_shutdown(card); |
| 1021 | if (st) |
| 1022 | dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n"); |
| 1023 | |
| 1024 | /* Sync outstanding event handlers. */ |
| 1025 | spin_lock_irqsave(&card->irq_lock, flags); |
| 1026 | rsxx_disable_ier_and_isr(card, CR_INTR_EVENT); |
| 1027 | spin_unlock_irqrestore(&card->irq_lock, flags); |
| 1028 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1029 | cancel_work_sync(&card->event_work); |
| 1030 | |
| 1031 | rsxx_destroy_dev(card); |
| 1032 | rsxx_dma_destroy(card); |
| 1033 | |
| 1034 | spin_lock_irqsave(&card->irq_lock, flags); |
| 1035 | rsxx_disable_ier_and_isr(card, CR_INTR_ALL); |
| 1036 | spin_unlock_irqrestore(&card->irq_lock, flags); |
Philip J Kelleher | 1ebfd10 | 2013-02-25 13:09:40 -0600 | [diff] [blame] | 1037 | |
| 1038 | /* Prevent work_structs from re-queuing themselves. */ |
| 1039 | card->halt = 1; |
| 1040 | |
Philip J Kelleher | 36f988e | 2013-06-18 14:52:21 -0500 | [diff] [blame] | 1041 | debugfs_remove_recursive(card->debugfs_dir); |
| 1042 | |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1043 | free_irq(dev->irq, card); |
| 1044 | |
| 1045 | if (!force_legacy) |
| 1046 | pci_disable_msi(dev); |
| 1047 | |
| 1048 | rsxx_creg_destroy(card); |
| 1049 | |
| 1050 | pci_iounmap(dev, card->regmap); |
| 1051 | |
| 1052 | pci_disable_device(dev); |
| 1053 | pci_release_regions(dev); |
| 1054 | |
| 1055 | kfree(card); |
| 1056 | } |
| 1057 | |
| 1058 | static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state) |
| 1059 | { |
| 1060 | /* We don't support suspend at this time. */ |
| 1061 | return -ENOSYS; |
| 1062 | } |
| 1063 | |
| 1064 | static void rsxx_pci_shutdown(struct pci_dev *dev) |
| 1065 | { |
| 1066 | struct rsxx_cardinfo *card = pci_get_drvdata(dev); |
| 1067 | unsigned long flags; |
| 1068 | int i; |
| 1069 | |
| 1070 | if (!card) |
| 1071 | return; |
| 1072 | |
| 1073 | dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n"); |
| 1074 | |
| 1075 | rsxx_detach_dev(card); |
| 1076 | |
| 1077 | for (i = 0; i < card->n_targets; i++) { |
| 1078 | spin_lock_irqsave(&card->irq_lock, flags); |
| 1079 | rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i)); |
| 1080 | spin_unlock_irqrestore(&card->irq_lock, flags); |
| 1081 | } |
| 1082 | |
| 1083 | card_shutdown(card); |
| 1084 | } |
| 1085 | |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 1086 | static const struct pci_error_handlers rsxx_err_handler = { |
| 1087 | .error_detected = rsxx_error_detected, |
| 1088 | .slot_reset = rsxx_slot_reset, |
| 1089 | }; |
| 1090 | |
Benoit Taine | 9baa3c3 | 2014-08-08 15:56:03 +0200 | [diff] [blame] | 1091 | static const struct pci_device_id rsxx_pci_ids[] = { |
Philip J Kelleher | 9bb3c44 | 2013-02-27 09:24:59 -0600 | [diff] [blame] | 1092 | {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)}, |
| 1093 | {PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)}, |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1094 | {0,}, |
| 1095 | }; |
| 1096 | |
| 1097 | MODULE_DEVICE_TABLE(pci, rsxx_pci_ids); |
| 1098 | |
| 1099 | static struct pci_driver rsxx_pci_driver = { |
| 1100 | .name = DRIVER_NAME, |
| 1101 | .id_table = rsxx_pci_ids, |
| 1102 | .probe = rsxx_pci_probe, |
Stephen Rothwell | 82bed4d | 2013-02-06 14:03:13 +1100 | [diff] [blame] | 1103 | .remove = rsxx_pci_remove, |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1104 | .suspend = rsxx_pci_suspend, |
| 1105 | .shutdown = rsxx_pci_shutdown, |
Philip J Kelleher | c95246c | 2013-03-16 08:22:25 +0100 | [diff] [blame] | 1106 | .err_handler = &rsxx_err_handler, |
josh.h.morris@us.ibm.com | 8722ff8 | 2013-02-05 14:15:02 +0100 | [diff] [blame] | 1107 | }; |
| 1108 | |
| 1109 | static int __init rsxx_core_init(void) |
| 1110 | { |
| 1111 | int st; |
| 1112 | |
| 1113 | st = rsxx_dev_init(); |
| 1114 | if (st) |
| 1115 | return st; |
| 1116 | |
| 1117 | st = rsxx_dma_init(); |
| 1118 | if (st) |
| 1119 | goto dma_init_failed; |
| 1120 | |
| 1121 | st = rsxx_creg_init(); |
| 1122 | if (st) |
| 1123 | goto creg_init_failed; |
| 1124 | |
| 1125 | return pci_register_driver(&rsxx_pci_driver); |
| 1126 | |
| 1127 | creg_init_failed: |
| 1128 | rsxx_dma_cleanup(); |
| 1129 | dma_init_failed: |
| 1130 | rsxx_dev_cleanup(); |
| 1131 | |
| 1132 | return st; |
| 1133 | } |
| 1134 | |
| 1135 | static void __exit rsxx_core_cleanup(void) |
| 1136 | { |
| 1137 | pci_unregister_driver(&rsxx_pci_driver); |
| 1138 | rsxx_creg_cleanup(); |
| 1139 | rsxx_dma_cleanup(); |
| 1140 | rsxx_dev_cleanup(); |
| 1141 | } |
| 1142 | |
| 1143 | module_init(rsxx_core_init); |
| 1144 | module_exit(rsxx_core_cleanup); |