1132 lines
28 KiB
C
1132 lines
28 KiB
C
/*
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* Filename: core.c
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*
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*
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* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
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* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
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*
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* (C) Copyright 2013 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/reboot.h>
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#include <linux/slab.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/genhd.h>
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#include <linux/idr.h>
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#include "rsxx_priv.h"
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#include "rsxx_cfg.h"
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#define NO_LEGACY 0
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#define SYNC_START_TIMEOUT (10 * 60) /* 10 minutes */
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MODULE_DESCRIPTION("IBM Flash Adapter 900GB Full Height Device Driver");
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MODULE_AUTHOR("Joshua Morris/Philip Kelleher, IBM");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRIVER_VERSION);
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static unsigned int force_legacy = NO_LEGACY;
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module_param(force_legacy, uint, 0444);
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MODULE_PARM_DESC(force_legacy, "Force the use of legacy type PCI interrupts");
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static unsigned int sync_start = 1;
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module_param(sync_start, uint, 0444);
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MODULE_PARM_DESC(sync_start, "On by Default: Driver load will not complete "
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"until the card startup has completed.");
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static DEFINE_IDA(rsxx_disk_ida);
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/* --------------------Debugfs Setup ------------------- */
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static int rsxx_attr_pci_regs_show(struct seq_file *m, void *p)
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{
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struct rsxx_cardinfo *card = m->private;
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seq_printf(m, "HWID 0x%08x\n",
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ioread32(card->regmap + HWID));
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seq_printf(m, "SCRATCH 0x%08x\n",
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ioread32(card->regmap + SCRATCH));
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seq_printf(m, "IER 0x%08x\n",
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ioread32(card->regmap + IER));
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seq_printf(m, "IPR 0x%08x\n",
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ioread32(card->regmap + IPR));
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seq_printf(m, "CREG_CMD 0x%08x\n",
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ioread32(card->regmap + CREG_CMD));
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seq_printf(m, "CREG_ADD 0x%08x\n",
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ioread32(card->regmap + CREG_ADD));
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seq_printf(m, "CREG_CNT 0x%08x\n",
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ioread32(card->regmap + CREG_CNT));
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seq_printf(m, "CREG_STAT 0x%08x\n",
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ioread32(card->regmap + CREG_STAT));
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seq_printf(m, "CREG_DATA0 0x%08x\n",
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ioread32(card->regmap + CREG_DATA0));
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seq_printf(m, "CREG_DATA1 0x%08x\n",
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ioread32(card->regmap + CREG_DATA1));
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seq_printf(m, "CREG_DATA2 0x%08x\n",
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ioread32(card->regmap + CREG_DATA2));
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seq_printf(m, "CREG_DATA3 0x%08x\n",
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ioread32(card->regmap + CREG_DATA3));
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seq_printf(m, "CREG_DATA4 0x%08x\n",
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ioread32(card->regmap + CREG_DATA4));
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seq_printf(m, "CREG_DATA5 0x%08x\n",
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ioread32(card->regmap + CREG_DATA5));
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seq_printf(m, "CREG_DATA6 0x%08x\n",
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ioread32(card->regmap + CREG_DATA6));
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seq_printf(m, "CREG_DATA7 0x%08x\n",
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ioread32(card->regmap + CREG_DATA7));
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seq_printf(m, "INTR_COAL 0x%08x\n",
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ioread32(card->regmap + INTR_COAL));
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seq_printf(m, "HW_ERROR 0x%08x\n",
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ioread32(card->regmap + HW_ERROR));
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seq_printf(m, "DEBUG0 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG0));
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seq_printf(m, "DEBUG1 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG1));
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seq_printf(m, "DEBUG2 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG2));
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seq_printf(m, "DEBUG3 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG3));
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seq_printf(m, "DEBUG4 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG4));
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seq_printf(m, "DEBUG5 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG5));
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seq_printf(m, "DEBUG6 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG6));
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seq_printf(m, "DEBUG7 0x%08x\n",
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ioread32(card->regmap + PCI_DEBUG7));
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seq_printf(m, "RECONFIG 0x%08x\n",
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ioread32(card->regmap + PCI_RECONFIG));
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return 0;
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}
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static int rsxx_attr_stats_show(struct seq_file *m, void *p)
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{
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struct rsxx_cardinfo *card = m->private;
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int i;
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for (i = 0; i < card->n_targets; i++) {
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seq_printf(m, "Ctrl %d CRC Errors = %d\n",
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i, card->ctrl[i].stats.crc_errors);
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seq_printf(m, "Ctrl %d Hard Errors = %d\n",
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i, card->ctrl[i].stats.hard_errors);
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seq_printf(m, "Ctrl %d Soft Errors = %d\n",
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i, card->ctrl[i].stats.soft_errors);
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seq_printf(m, "Ctrl %d Writes Issued = %d\n",
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i, card->ctrl[i].stats.writes_issued);
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seq_printf(m, "Ctrl %d Writes Failed = %d\n",
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i, card->ctrl[i].stats.writes_failed);
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seq_printf(m, "Ctrl %d Reads Issued = %d\n",
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i, card->ctrl[i].stats.reads_issued);
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seq_printf(m, "Ctrl %d Reads Failed = %d\n",
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i, card->ctrl[i].stats.reads_failed);
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seq_printf(m, "Ctrl %d Reads Retried = %d\n",
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i, card->ctrl[i].stats.reads_retried);
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seq_printf(m, "Ctrl %d Discards Issued = %d\n",
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i, card->ctrl[i].stats.discards_issued);
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seq_printf(m, "Ctrl %d Discards Failed = %d\n",
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i, card->ctrl[i].stats.discards_failed);
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seq_printf(m, "Ctrl %d DMA SW Errors = %d\n",
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i, card->ctrl[i].stats.dma_sw_err);
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seq_printf(m, "Ctrl %d DMA HW Faults = %d\n",
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i, card->ctrl[i].stats.dma_hw_fault);
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seq_printf(m, "Ctrl %d DMAs Cancelled = %d\n",
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i, card->ctrl[i].stats.dma_cancelled);
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seq_printf(m, "Ctrl %d SW Queue Depth = %d\n",
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i, card->ctrl[i].stats.sw_q_depth);
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seq_printf(m, "Ctrl %d HW Queue Depth = %d\n",
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i, atomic_read(&card->ctrl[i].stats.hw_q_depth));
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}
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return 0;
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}
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static int rsxx_attr_stats_open(struct inode *inode, struct file *file)
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{
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return single_open(file, rsxx_attr_stats_show, inode->i_private);
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}
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static int rsxx_attr_pci_regs_open(struct inode *inode, struct file *file)
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{
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return single_open(file, rsxx_attr_pci_regs_show, inode->i_private);
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}
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static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct rsxx_cardinfo *card = file_inode(fp)->i_private;
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char *buf;
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ssize_t st;
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buf = kzalloc(cnt, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1);
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if (!st)
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st = copy_to_user(ubuf, buf, cnt);
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kfree(buf);
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if (st)
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return st;
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*ppos += cnt;
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return cnt;
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}
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static ssize_t rsxx_cram_write(struct file *fp, const char __user *ubuf,
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size_t cnt, loff_t *ppos)
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{
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struct rsxx_cardinfo *card = file_inode(fp)->i_private;
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char *buf;
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ssize_t st;
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buf = memdup_user(ubuf, cnt);
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if (IS_ERR(buf))
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return PTR_ERR(buf);
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st = rsxx_creg_write(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1);
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kfree(buf);
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if (st)
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return st;
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*ppos += cnt;
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return cnt;
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}
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static const struct file_operations debugfs_cram_fops = {
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.owner = THIS_MODULE,
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.read = rsxx_cram_read,
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.write = rsxx_cram_write,
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};
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static const struct file_operations debugfs_stats_fops = {
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.owner = THIS_MODULE,
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.open = rsxx_attr_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations debugfs_pci_regs_fops = {
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.owner = THIS_MODULE,
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.open = rsxx_attr_pci_regs_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static void rsxx_debugfs_dev_new(struct rsxx_cardinfo *card)
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{
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struct dentry *debugfs_stats;
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struct dentry *debugfs_pci_regs;
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struct dentry *debugfs_cram;
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card->debugfs_dir = debugfs_create_dir(card->gendisk->disk_name, NULL);
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if (IS_ERR_OR_NULL(card->debugfs_dir))
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goto failed_debugfs_dir;
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debugfs_stats = debugfs_create_file("stats", 0444,
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card->debugfs_dir, card,
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&debugfs_stats_fops);
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if (IS_ERR_OR_NULL(debugfs_stats))
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goto failed_debugfs_stats;
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debugfs_pci_regs = debugfs_create_file("pci_regs", 0444,
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card->debugfs_dir, card,
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&debugfs_pci_regs_fops);
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if (IS_ERR_OR_NULL(debugfs_pci_regs))
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goto failed_debugfs_pci_regs;
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debugfs_cram = debugfs_create_file("cram", 0644,
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card->debugfs_dir, card,
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&debugfs_cram_fops);
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if (IS_ERR_OR_NULL(debugfs_cram))
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goto failed_debugfs_cram;
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return;
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failed_debugfs_cram:
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debugfs_remove(debugfs_pci_regs);
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failed_debugfs_pci_regs:
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debugfs_remove(debugfs_stats);
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failed_debugfs_stats:
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debugfs_remove(card->debugfs_dir);
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failed_debugfs_dir:
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card->debugfs_dir = NULL;
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}
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/*----------------- Interrupt Control & Handling -------------------*/
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static void rsxx_mask_interrupts(struct rsxx_cardinfo *card)
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{
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card->isr_mask = 0;
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card->ier_mask = 0;
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}
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static void __enable_intr(unsigned int *mask, unsigned int intr)
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{
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*mask |= intr;
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}
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static void __disable_intr(unsigned int *mask, unsigned int intr)
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{
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*mask &= ~intr;
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}
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/*
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* NOTE: Disabling the IER will disable the hardware interrupt.
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* Disabling the ISR will disable the software handling of the ISR bit.
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*
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* Enable/Disable interrupt functions assume the card->irq_lock
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* is held by the caller.
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*/
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void rsxx_enable_ier(struct rsxx_cardinfo *card, unsigned int intr)
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{
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if (unlikely(card->halt) ||
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unlikely(card->eeh_state))
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return;
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__enable_intr(&card->ier_mask, intr);
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iowrite32(card->ier_mask, card->regmap + IER);
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}
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void rsxx_disable_ier(struct rsxx_cardinfo *card, unsigned int intr)
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{
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if (unlikely(card->eeh_state))
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return;
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__disable_intr(&card->ier_mask, intr);
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iowrite32(card->ier_mask, card->regmap + IER);
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}
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void rsxx_enable_ier_and_isr(struct rsxx_cardinfo *card,
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unsigned int intr)
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{
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if (unlikely(card->halt) ||
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unlikely(card->eeh_state))
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return;
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__enable_intr(&card->isr_mask, intr);
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__enable_intr(&card->ier_mask, intr);
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iowrite32(card->ier_mask, card->regmap + IER);
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}
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void rsxx_disable_ier_and_isr(struct rsxx_cardinfo *card,
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unsigned int intr)
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{
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if (unlikely(card->eeh_state))
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return;
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__disable_intr(&card->isr_mask, intr);
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__disable_intr(&card->ier_mask, intr);
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iowrite32(card->ier_mask, card->regmap + IER);
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}
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static irqreturn_t rsxx_isr(int irq, void *pdata)
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{
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struct rsxx_cardinfo *card = pdata;
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unsigned int isr;
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int handled = 0;
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int reread_isr;
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int i;
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spin_lock(&card->irq_lock);
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do {
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reread_isr = 0;
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if (unlikely(card->eeh_state))
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break;
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isr = ioread32(card->regmap + ISR);
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if (isr == 0xffffffff) {
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/*
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* A few systems seem to have an intermittent issue
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* where PCI reads return all Fs, but retrying the read
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* a little later will return as expected.
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*/
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dev_info(CARD_TO_DEV(card),
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"ISR = 0xFFFFFFFF, retrying later\n");
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break;
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}
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isr &= card->isr_mask;
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if (!isr)
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break;
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for (i = 0; i < card->n_targets; i++) {
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if (isr & CR_INTR_DMA(i)) {
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if (card->ier_mask & CR_INTR_DMA(i)) {
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rsxx_disable_ier(card, CR_INTR_DMA(i));
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reread_isr = 1;
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}
|
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queue_work(card->ctrl[i].done_wq,
|
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&card->ctrl[i].dma_done_work);
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handled++;
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}
|
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}
|
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|
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if (isr & CR_INTR_CREG) {
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queue_work(card->creg_ctrl.creg_wq,
|
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&card->creg_ctrl.done_work);
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handled++;
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}
|
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|
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if (isr & CR_INTR_EVENT) {
|
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queue_work(card->event_wq, &card->event_work);
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rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
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handled++;
|
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}
|
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} while (reread_isr);
|
|
|
|
spin_unlock(&card->irq_lock);
|
|
|
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return handled ? IRQ_HANDLED : IRQ_NONE;
|
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}
|
|
|
|
/*----------------- Card Event Handler -------------------*/
|
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static const char * const rsxx_card_state_to_str(unsigned int state)
|
|
{
|
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static const char * const state_strings[] = {
|
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"Unknown", "Shutdown", "Starting", "Formatting",
|
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"Uninitialized", "Good", "Shutting Down",
|
|
"Fault", "Read Only Fault", "dStroying"
|
|
};
|
|
|
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return state_strings[ffs(state)];
|
|
}
|
|
|
|
static void card_state_change(struct rsxx_cardinfo *card,
|
|
unsigned int new_state)
|
|
{
|
|
int st;
|
|
|
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dev_info(CARD_TO_DEV(card),
|
|
"card state change detected.(%s -> %s)\n",
|
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rsxx_card_state_to_str(card->state),
|
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rsxx_card_state_to_str(new_state));
|
|
|
|
card->state = new_state;
|
|
|
|
/* Don't attach DMA interfaces if the card has an invalid config */
|
|
if (!card->config_valid)
|
|
return;
|
|
|
|
switch (new_state) {
|
|
case CARD_STATE_RD_ONLY_FAULT:
|
|
dev_crit(CARD_TO_DEV(card),
|
|
"Hardware has entered read-only mode!\n");
|
|
/*
|
|
* Fall through so the DMA devices can be attached and
|
|
* the user can attempt to pull off their data.
|
|
*/
|
|
case CARD_STATE_GOOD:
|
|
st = rsxx_get_card_size8(card, &card->size8);
|
|
if (st)
|
|
dev_err(CARD_TO_DEV(card),
|
|
"Failed attaching DMA devices\n");
|
|
|
|
if (card->config_valid)
|
|
set_capacity(card->gendisk, card->size8 >> 9);
|
|
break;
|
|
|
|
case CARD_STATE_FAULT:
|
|
dev_crit(CARD_TO_DEV(card),
|
|
"Hardware Fault reported!\n");
|
|
/* Fall through. */
|
|
|
|
/* Everything else, detach DMA interface if it's attached. */
|
|
case CARD_STATE_SHUTDOWN:
|
|
case CARD_STATE_STARTING:
|
|
case CARD_STATE_FORMATTING:
|
|
case CARD_STATE_UNINITIALIZED:
|
|
case CARD_STATE_SHUTTING_DOWN:
|
|
/*
|
|
* dStroy is a term coined by marketing to represent the low level
|
|
* secure erase.
|
|
*/
|
|
case CARD_STATE_DSTROYING:
|
|
set_capacity(card->gendisk, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void card_event_handler(struct work_struct *work)
|
|
{
|
|
struct rsxx_cardinfo *card;
|
|
unsigned int state;
|
|
unsigned long flags;
|
|
int st;
|
|
|
|
card = container_of(work, struct rsxx_cardinfo, event_work);
|
|
|
|
if (unlikely(card->halt))
|
|
return;
|
|
|
|
/*
|
|
* Enable the interrupt now to avoid any weird race conditions where a
|
|
* state change might occur while rsxx_get_card_state() is
|
|
* processing a returned creg cmd.
|
|
*/
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
|
|
st = rsxx_get_card_state(card, &state);
|
|
if (st) {
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Failed reading state after event.\n");
|
|
return;
|
|
}
|
|
|
|
if (card->state != state)
|
|
card_state_change(card, state);
|
|
|
|
if (card->creg_ctrl.creg_stats.stat & CREG_STAT_LOG_PENDING)
|
|
rsxx_read_hw_log(card);
|
|
}
|
|
|
|
/*----------------- Card Operations -------------------*/
|
|
static int card_shutdown(struct rsxx_cardinfo *card)
|
|
{
|
|
unsigned int state;
|
|
signed long start;
|
|
const int timeout = msecs_to_jiffies(120000);
|
|
int st;
|
|
|
|
/* We can't issue a shutdown if the card is in a transition state */
|
|
start = jiffies;
|
|
do {
|
|
st = rsxx_get_card_state(card, &state);
|
|
if (st)
|
|
return st;
|
|
} while (state == CARD_STATE_STARTING &&
|
|
(jiffies - start < timeout));
|
|
|
|
if (state == CARD_STATE_STARTING)
|
|
return -ETIMEDOUT;
|
|
|
|
/* Only issue a shutdown if we need to */
|
|
if ((state != CARD_STATE_SHUTTING_DOWN) &&
|
|
(state != CARD_STATE_SHUTDOWN)) {
|
|
st = rsxx_issue_card_cmd(card, CARD_CMD_SHUTDOWN);
|
|
if (st)
|
|
return st;
|
|
}
|
|
|
|
start = jiffies;
|
|
do {
|
|
st = rsxx_get_card_state(card, &state);
|
|
if (st)
|
|
return st;
|
|
} while (state != CARD_STATE_SHUTDOWN &&
|
|
(jiffies - start < timeout));
|
|
|
|
if (state != CARD_STATE_SHUTDOWN)
|
|
return -ETIMEDOUT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rsxx_eeh_frozen(struct pci_dev *dev)
|
|
{
|
|
struct rsxx_cardinfo *card = pci_get_drvdata(dev);
|
|
int i;
|
|
int st;
|
|
|
|
dev_warn(&dev->dev, "IBM Flash Adapter PCI: preparing for slot reset.\n");
|
|
|
|
card->eeh_state = 1;
|
|
rsxx_mask_interrupts(card);
|
|
|
|
/*
|
|
* We need to guarantee that the write for eeh_state and masking
|
|
* interrupts does not become reordered. This will prevent a possible
|
|
* race condition with the EEH code.
|
|
*/
|
|
wmb();
|
|
|
|
pci_disable_device(dev);
|
|
|
|
st = rsxx_eeh_save_issued_dmas(card);
|
|
if (st)
|
|
return st;
|
|
|
|
rsxx_eeh_save_issued_creg(card);
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
if (card->ctrl[i].status.buf)
|
|
pci_free_consistent(card->dev, STATUS_BUFFER_SIZE8,
|
|
card->ctrl[i].status.buf,
|
|
card->ctrl[i].status.dma_addr);
|
|
if (card->ctrl[i].cmd.buf)
|
|
pci_free_consistent(card->dev, COMMAND_BUFFER_SIZE8,
|
|
card->ctrl[i].cmd.buf,
|
|
card->ctrl[i].cmd.dma_addr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rsxx_eeh_failure(struct pci_dev *dev)
|
|
{
|
|
struct rsxx_cardinfo *card = pci_get_drvdata(dev);
|
|
int i;
|
|
int cnt = 0;
|
|
|
|
dev_err(&dev->dev, "IBM Flash Adapter PCI: disabling failed card.\n");
|
|
|
|
card->eeh_state = 1;
|
|
card->halt = 1;
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
spin_lock_bh(&card->ctrl[i].queue_lock);
|
|
cnt = rsxx_cleanup_dma_queue(&card->ctrl[i],
|
|
&card->ctrl[i].queue,
|
|
COMPLETE_DMA);
|
|
spin_unlock_bh(&card->ctrl[i].queue_lock);
|
|
|
|
cnt += rsxx_dma_cancel(&card->ctrl[i]);
|
|
|
|
if (cnt)
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Freed %d queued DMAs on channel %d\n",
|
|
cnt, card->ctrl[i].id);
|
|
}
|
|
}
|
|
|
|
static int rsxx_eeh_fifo_flush_poll(struct rsxx_cardinfo *card)
|
|
{
|
|
unsigned int status;
|
|
int iter = 0;
|
|
|
|
/* We need to wait for the hardware to reset */
|
|
while (iter++ < 10) {
|
|
status = ioread32(card->regmap + PCI_RECONFIG);
|
|
|
|
if (status & RSXX_FLUSH_BUSY) {
|
|
ssleep(1);
|
|
continue;
|
|
}
|
|
|
|
if (status & RSXX_FLUSH_TIMEOUT)
|
|
dev_warn(CARD_TO_DEV(card), "HW: flash controller timeout\n");
|
|
return 0;
|
|
}
|
|
|
|
/* Hardware failed resetting itself. */
|
|
return -1;
|
|
}
|
|
|
|
static pci_ers_result_t rsxx_error_detected(struct pci_dev *dev,
|
|
enum pci_channel_state error)
|
|
{
|
|
int st;
|
|
|
|
if (dev->revision < RSXX_EEH_SUPPORT)
|
|
return PCI_ERS_RESULT_NONE;
|
|
|
|
if (error == pci_channel_io_perm_failure) {
|
|
rsxx_eeh_failure(dev);
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
st = rsxx_eeh_frozen(dev);
|
|
if (st) {
|
|
dev_err(&dev->dev, "Slot reset setup failed\n");
|
|
rsxx_eeh_failure(dev);
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
}
|
|
|
|
return PCI_ERS_RESULT_NEED_RESET;
|
|
}
|
|
|
|
static pci_ers_result_t rsxx_slot_reset(struct pci_dev *dev)
|
|
{
|
|
struct rsxx_cardinfo *card = pci_get_drvdata(dev);
|
|
unsigned long flags;
|
|
int i;
|
|
int st;
|
|
|
|
dev_warn(&dev->dev,
|
|
"IBM Flash Adapter PCI: recovering from slot reset.\n");
|
|
|
|
st = pci_enable_device(dev);
|
|
if (st)
|
|
goto failed_hw_setup;
|
|
|
|
pci_set_master(dev);
|
|
|
|
st = rsxx_eeh_fifo_flush_poll(card);
|
|
if (st)
|
|
goto failed_hw_setup;
|
|
|
|
rsxx_dma_queue_reset(card);
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
st = rsxx_hw_buffers_init(dev, &card->ctrl[i]);
|
|
if (st)
|
|
goto failed_hw_buffers_init;
|
|
}
|
|
|
|
if (card->config_valid)
|
|
rsxx_dma_configure(card);
|
|
|
|
/* Clears the ISR register from spurious interrupts */
|
|
st = ioread32(card->regmap + ISR);
|
|
|
|
card->eeh_state = 0;
|
|
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
if (card->n_targets & RSXX_MAX_TARGETS)
|
|
rsxx_enable_ier_and_isr(card, CR_INTR_ALL_G);
|
|
else
|
|
rsxx_enable_ier_and_isr(card, CR_INTR_ALL_C);
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
|
|
rsxx_kick_creg_queue(card);
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
spin_lock(&card->ctrl[i].queue_lock);
|
|
if (list_empty(&card->ctrl[i].queue)) {
|
|
spin_unlock(&card->ctrl[i].queue_lock);
|
|
continue;
|
|
}
|
|
spin_unlock(&card->ctrl[i].queue_lock);
|
|
|
|
queue_work(card->ctrl[i].issue_wq,
|
|
&card->ctrl[i].issue_dma_work);
|
|
}
|
|
|
|
dev_info(&dev->dev, "IBM Flash Adapter PCI: recovery complete.\n");
|
|
|
|
return PCI_ERS_RESULT_RECOVERED;
|
|
|
|
failed_hw_buffers_init:
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
if (card->ctrl[i].status.buf)
|
|
pci_free_consistent(card->dev,
|
|
STATUS_BUFFER_SIZE8,
|
|
card->ctrl[i].status.buf,
|
|
card->ctrl[i].status.dma_addr);
|
|
if (card->ctrl[i].cmd.buf)
|
|
pci_free_consistent(card->dev,
|
|
COMMAND_BUFFER_SIZE8,
|
|
card->ctrl[i].cmd.buf,
|
|
card->ctrl[i].cmd.dma_addr);
|
|
}
|
|
failed_hw_setup:
|
|
rsxx_eeh_failure(dev);
|
|
return PCI_ERS_RESULT_DISCONNECT;
|
|
|
|
}
|
|
|
|
/*----------------- Driver Initialization & Setup -------------------*/
|
|
/* Returns: 0 if the driver is compatible with the device
|
|
-1 if the driver is NOT compatible with the device */
|
|
static int rsxx_compatibility_check(struct rsxx_cardinfo *card)
|
|
{
|
|
unsigned char pci_rev;
|
|
|
|
pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev);
|
|
|
|
if (pci_rev > RS70_PCI_REV_SUPPORTED)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int rsxx_pci_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct rsxx_cardinfo *card;
|
|
int st;
|
|
unsigned int sync_timeout;
|
|
|
|
dev_info(&dev->dev, "PCI-Flash SSD discovered\n");
|
|
|
|
card = kzalloc(sizeof(*card), GFP_KERNEL);
|
|
if (!card)
|
|
return -ENOMEM;
|
|
|
|
card->dev = dev;
|
|
pci_set_drvdata(dev, card);
|
|
|
|
st = ida_alloc(&rsxx_disk_ida, GFP_KERNEL);
|
|
if (st < 0)
|
|
goto failed_ida_get;
|
|
card->disk_id = st;
|
|
|
|
st = pci_enable_device(dev);
|
|
if (st)
|
|
goto failed_enable;
|
|
|
|
pci_set_master(dev);
|
|
pci_set_dma_max_seg_size(dev, RSXX_HW_BLK_SIZE);
|
|
|
|
st = pci_set_dma_mask(dev, DMA_BIT_MASK(64));
|
|
if (st) {
|
|
dev_err(CARD_TO_DEV(card),
|
|
"No usable DMA configuration,aborting\n");
|
|
goto failed_dma_mask;
|
|
}
|
|
|
|
st = pci_request_regions(dev, DRIVER_NAME);
|
|
if (st) {
|
|
dev_err(CARD_TO_DEV(card),
|
|
"Failed to request memory region\n");
|
|
goto failed_request_regions;
|
|
}
|
|
|
|
if (pci_resource_len(dev, 0) == 0) {
|
|
dev_err(CARD_TO_DEV(card), "BAR0 has length 0!\n");
|
|
st = -ENOMEM;
|
|
goto failed_iomap;
|
|
}
|
|
|
|
card->regmap = pci_iomap(dev, 0, 0);
|
|
if (!card->regmap) {
|
|
dev_err(CARD_TO_DEV(card), "Failed to map BAR0\n");
|
|
st = -ENOMEM;
|
|
goto failed_iomap;
|
|
}
|
|
|
|
spin_lock_init(&card->irq_lock);
|
|
card->halt = 0;
|
|
card->eeh_state = 0;
|
|
|
|
spin_lock_irq(&card->irq_lock);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
|
|
spin_unlock_irq(&card->irq_lock);
|
|
|
|
if (!force_legacy) {
|
|
st = pci_enable_msi(dev);
|
|
if (st)
|
|
dev_warn(CARD_TO_DEV(card),
|
|
"Failed to enable MSI\n");
|
|
}
|
|
|
|
st = request_irq(dev->irq, rsxx_isr, IRQF_SHARED,
|
|
DRIVER_NAME, card);
|
|
if (st) {
|
|
dev_err(CARD_TO_DEV(card),
|
|
"Failed requesting IRQ%d\n", dev->irq);
|
|
goto failed_irq;
|
|
}
|
|
|
|
/************* Setup Processor Command Interface *************/
|
|
st = rsxx_creg_setup(card);
|
|
if (st) {
|
|
dev_err(CARD_TO_DEV(card), "Failed to setup creg interface.\n");
|
|
goto failed_creg_setup;
|
|
}
|
|
|
|
spin_lock_irq(&card->irq_lock);
|
|
rsxx_enable_ier_and_isr(card, CR_INTR_CREG);
|
|
spin_unlock_irq(&card->irq_lock);
|
|
|
|
st = rsxx_compatibility_check(card);
|
|
if (st) {
|
|
dev_warn(CARD_TO_DEV(card),
|
|
"Incompatible driver detected. Please update the driver.\n");
|
|
st = -EINVAL;
|
|
goto failed_compatiblity_check;
|
|
}
|
|
|
|
/************* Load Card Config *************/
|
|
st = rsxx_load_config(card);
|
|
if (st)
|
|
dev_err(CARD_TO_DEV(card),
|
|
"Failed loading card config\n");
|
|
|
|
/************* Setup DMA Engine *************/
|
|
st = rsxx_get_num_targets(card, &card->n_targets);
|
|
if (st)
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Failed reading the number of DMA targets\n");
|
|
|
|
card->ctrl = kcalloc(card->n_targets, sizeof(*card->ctrl),
|
|
GFP_KERNEL);
|
|
if (!card->ctrl) {
|
|
st = -ENOMEM;
|
|
goto failed_dma_setup;
|
|
}
|
|
|
|
st = rsxx_dma_setup(card);
|
|
if (st) {
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Failed to setup DMA engine\n");
|
|
goto failed_dma_setup;
|
|
}
|
|
|
|
/************* Setup Card Event Handler *************/
|
|
card->event_wq = create_singlethread_workqueue(DRIVER_NAME"_event");
|
|
if (!card->event_wq) {
|
|
dev_err(CARD_TO_DEV(card), "Failed card event setup.\n");
|
|
goto failed_event_handler;
|
|
}
|
|
|
|
INIT_WORK(&card->event_work, card_event_handler);
|
|
|
|
st = rsxx_setup_dev(card);
|
|
if (st)
|
|
goto failed_create_dev;
|
|
|
|
rsxx_get_card_state(card, &card->state);
|
|
|
|
dev_info(CARD_TO_DEV(card),
|
|
"card state: %s\n",
|
|
rsxx_card_state_to_str(card->state));
|
|
|
|
/*
|
|
* Now that the DMA Engine and devices have been setup,
|
|
* we can enable the event interrupt(it kicks off actions in
|
|
* those layers so we couldn't enable it right away.)
|
|
*/
|
|
spin_lock_irq(&card->irq_lock);
|
|
rsxx_enable_ier_and_isr(card, CR_INTR_EVENT);
|
|
spin_unlock_irq(&card->irq_lock);
|
|
|
|
if (card->state == CARD_STATE_SHUTDOWN) {
|
|
st = rsxx_issue_card_cmd(card, CARD_CMD_STARTUP);
|
|
if (st)
|
|
dev_crit(CARD_TO_DEV(card),
|
|
"Failed issuing card startup\n");
|
|
if (sync_start) {
|
|
sync_timeout = SYNC_START_TIMEOUT;
|
|
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Waiting for card to startup\n");
|
|
|
|
do {
|
|
ssleep(1);
|
|
sync_timeout--;
|
|
|
|
rsxx_get_card_state(card, &card->state);
|
|
} while (sync_timeout &&
|
|
(card->state == CARD_STATE_STARTING));
|
|
|
|
if (card->state == CARD_STATE_STARTING) {
|
|
dev_warn(CARD_TO_DEV(card),
|
|
"Card startup timed out\n");
|
|
card->size8 = 0;
|
|
} else {
|
|
dev_info(CARD_TO_DEV(card),
|
|
"card state: %s\n",
|
|
rsxx_card_state_to_str(card->state));
|
|
st = rsxx_get_card_size8(card, &card->size8);
|
|
if (st)
|
|
card->size8 = 0;
|
|
}
|
|
}
|
|
} else if (card->state == CARD_STATE_GOOD ||
|
|
card->state == CARD_STATE_RD_ONLY_FAULT) {
|
|
st = rsxx_get_card_size8(card, &card->size8);
|
|
if (st)
|
|
card->size8 = 0;
|
|
}
|
|
|
|
rsxx_attach_dev(card);
|
|
|
|
/************* Setup Debugfs *************/
|
|
rsxx_debugfs_dev_new(card);
|
|
|
|
return 0;
|
|
|
|
failed_create_dev:
|
|
destroy_workqueue(card->event_wq);
|
|
card->event_wq = NULL;
|
|
failed_event_handler:
|
|
rsxx_dma_destroy(card);
|
|
failed_dma_setup:
|
|
failed_compatiblity_check:
|
|
destroy_workqueue(card->creg_ctrl.creg_wq);
|
|
card->creg_ctrl.creg_wq = NULL;
|
|
failed_creg_setup:
|
|
spin_lock_irq(&card->irq_lock);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
|
|
spin_unlock_irq(&card->irq_lock);
|
|
free_irq(dev->irq, card);
|
|
if (!force_legacy)
|
|
pci_disable_msi(dev);
|
|
failed_irq:
|
|
pci_iounmap(dev, card->regmap);
|
|
failed_iomap:
|
|
pci_release_regions(dev);
|
|
failed_request_regions:
|
|
failed_dma_mask:
|
|
pci_disable_device(dev);
|
|
failed_enable:
|
|
ida_free(&rsxx_disk_ida, card->disk_id);
|
|
failed_ida_get:
|
|
kfree(card);
|
|
|
|
return st;
|
|
}
|
|
|
|
static void rsxx_pci_remove(struct pci_dev *dev)
|
|
{
|
|
struct rsxx_cardinfo *card = pci_get_drvdata(dev);
|
|
unsigned long flags;
|
|
int st;
|
|
int i;
|
|
|
|
if (!card)
|
|
return;
|
|
|
|
dev_info(CARD_TO_DEV(card),
|
|
"Removing PCI-Flash SSD.\n");
|
|
|
|
rsxx_detach_dev(card);
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
}
|
|
|
|
st = card_shutdown(card);
|
|
if (st)
|
|
dev_crit(CARD_TO_DEV(card), "Shutdown failed!\n");
|
|
|
|
/* Sync outstanding event handlers. */
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_EVENT);
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
|
|
cancel_work_sync(&card->event_work);
|
|
|
|
rsxx_destroy_dev(card);
|
|
rsxx_dma_destroy(card);
|
|
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_ALL);
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
|
|
/* Prevent work_structs from re-queuing themselves. */
|
|
card->halt = 1;
|
|
|
|
debugfs_remove_recursive(card->debugfs_dir);
|
|
|
|
free_irq(dev->irq, card);
|
|
|
|
if (!force_legacy)
|
|
pci_disable_msi(dev);
|
|
|
|
rsxx_creg_destroy(card);
|
|
|
|
pci_iounmap(dev, card->regmap);
|
|
|
|
pci_disable_device(dev);
|
|
pci_release_regions(dev);
|
|
|
|
ida_free(&rsxx_disk_ida, card->disk_id);
|
|
kfree(card);
|
|
}
|
|
|
|
static int rsxx_pci_suspend(struct pci_dev *dev, pm_message_t state)
|
|
{
|
|
/* We don't support suspend at this time. */
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static void rsxx_pci_shutdown(struct pci_dev *dev)
|
|
{
|
|
struct rsxx_cardinfo *card = pci_get_drvdata(dev);
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
if (!card)
|
|
return;
|
|
|
|
dev_info(CARD_TO_DEV(card), "Shutting down PCI-Flash SSD.\n");
|
|
|
|
rsxx_detach_dev(card);
|
|
|
|
for (i = 0; i < card->n_targets; i++) {
|
|
spin_lock_irqsave(&card->irq_lock, flags);
|
|
rsxx_disable_ier_and_isr(card, CR_INTR_DMA(i));
|
|
spin_unlock_irqrestore(&card->irq_lock, flags);
|
|
}
|
|
|
|
card_shutdown(card);
|
|
}
|
|
|
|
static const struct pci_error_handlers rsxx_err_handler = {
|
|
.error_detected = rsxx_error_detected,
|
|
.slot_reset = rsxx_slot_reset,
|
|
};
|
|
|
|
static const struct pci_device_id rsxx_pci_ids[] = {
|
|
{PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS70_FLASH)},
|
|
{PCI_DEVICE(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_FS80_FLASH)},
|
|
{0,},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, rsxx_pci_ids);
|
|
|
|
static struct pci_driver rsxx_pci_driver = {
|
|
.name = DRIVER_NAME,
|
|
.id_table = rsxx_pci_ids,
|
|
.probe = rsxx_pci_probe,
|
|
.remove = rsxx_pci_remove,
|
|
.suspend = rsxx_pci_suspend,
|
|
.shutdown = rsxx_pci_shutdown,
|
|
.err_handler = &rsxx_err_handler,
|
|
};
|
|
|
|
static int __init rsxx_core_init(void)
|
|
{
|
|
int st;
|
|
|
|
st = rsxx_dev_init();
|
|
if (st)
|
|
return st;
|
|
|
|
st = rsxx_dma_init();
|
|
if (st)
|
|
goto dma_init_failed;
|
|
|
|
st = rsxx_creg_init();
|
|
if (st)
|
|
goto creg_init_failed;
|
|
|
|
return pci_register_driver(&rsxx_pci_driver);
|
|
|
|
creg_init_failed:
|
|
rsxx_dma_cleanup();
|
|
dma_init_failed:
|
|
rsxx_dev_cleanup();
|
|
|
|
return st;
|
|
}
|
|
|
|
static void __exit rsxx_core_cleanup(void)
|
|
{
|
|
pci_unregister_driver(&rsxx_pci_driver);
|
|
rsxx_creg_cleanup();
|
|
rsxx_dma_cleanup();
|
|
rsxx_dev_cleanup();
|
|
}
|
|
|
|
module_init(rsxx_core_init);
|
|
module_exit(rsxx_core_cleanup);
|