diff options
Diffstat (limited to 'drivers/scsi/sym53c8xx_2/sym_glue.c')
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_glue.c | 2061 |
1 files changed, 2061 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c new file mode 100644 index 000000000..d9a045f98 --- /dev/null +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -0,0 +1,2061 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family + * of PCI-SCSI IO processors. + * + * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr> + * Copyright (c) 2003-2005 Matthew Wilcox <matthew@wil.cx> + * + * This driver is derived from the Linux sym53c8xx driver. + * Copyright (C) 1998-2000 Gerard Roudier + * + * The sym53c8xx driver is derived from the ncr53c8xx driver that had been + * a port of the FreeBSD ncr driver to Linux-1.2.13. + * + * The original ncr driver has been written for 386bsd and FreeBSD by + * Wolfgang Stanglmeier <wolf@cologne.de> + * Stefan Esser <se@mi.Uni-Koeln.de> + * Copyright (C) 1994 Wolfgang Stanglmeier + * + * Other major contributions: + * + * NVRAM detection and reading. + * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk> + * + *----------------------------------------------------------------------------- + */ +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/spinlock.h> +#include <scsi/scsi.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_transport.h> + +#include "sym_glue.h" +#include "sym_nvram.h" + +#define NAME53C "sym53c" +#define NAME53C8XX "sym53c8xx" + +struct sym_driver_setup sym_driver_setup = SYM_LINUX_DRIVER_SETUP; +unsigned int sym_debug_flags = 0; + +static char *excl_string; +static char *safe_string; +module_param_named(cmd_per_lun, sym_driver_setup.max_tag, ushort, 0); +module_param_named(burst, sym_driver_setup.burst_order, byte, 0); +module_param_named(led, sym_driver_setup.scsi_led, byte, 0); +module_param_named(diff, sym_driver_setup.scsi_diff, byte, 0); +module_param_named(irqm, sym_driver_setup.irq_mode, byte, 0); +module_param_named(buschk, sym_driver_setup.scsi_bus_check, byte, 0); +module_param_named(hostid, sym_driver_setup.host_id, byte, 0); +module_param_named(verb, sym_driver_setup.verbose, byte, 0); +module_param_named(debug, sym_debug_flags, uint, 0); +module_param_named(settle, sym_driver_setup.settle_delay, byte, 0); +module_param_named(nvram, sym_driver_setup.use_nvram, byte, 0); +module_param_named(excl, excl_string, charp, 0); +module_param_named(safe, safe_string, charp, 0); + +MODULE_PARM_DESC(cmd_per_lun, "The maximum number of tags to use by default"); +MODULE_PARM_DESC(burst, "Maximum burst. 0 to disable, 255 to read from registers"); +MODULE_PARM_DESC(led, "Set to 1 to enable LED support"); +MODULE_PARM_DESC(diff, "0 for no differential mode, 1 for BIOS, 2 for always, 3 for not GPIO3"); +MODULE_PARM_DESC(irqm, "0 for open drain, 1 to leave alone, 2 for totem pole"); +MODULE_PARM_DESC(buschk, "0 to not check, 1 for detach on error, 2 for warn on error"); +MODULE_PARM_DESC(hostid, "The SCSI ID to use for the host adapters"); +MODULE_PARM_DESC(verb, "0 for minimal verbosity, 1 for normal, 2 for excessive"); +MODULE_PARM_DESC(debug, "Set bits to enable debugging"); +MODULE_PARM_DESC(settle, "Settle delay in seconds. Default 3"); +MODULE_PARM_DESC(nvram, "Option currently not used"); +MODULE_PARM_DESC(excl, "List ioport addresses here to prevent controllers from being attached"); +MODULE_PARM_DESC(safe, "Set other settings to a \"safe mode\""); + +MODULE_LICENSE("GPL"); +MODULE_VERSION(SYM_VERSION); +MODULE_AUTHOR("Matthew Wilcox <matthew@wil.cx>"); +MODULE_DESCRIPTION("NCR, Symbios and LSI 8xx and 1010 PCI SCSI adapters"); + +static void sym2_setup_params(void) +{ + char *p = excl_string; + int xi = 0; + + while (p && (xi < 8)) { + char *next_p; + int val = (int) simple_strtoul(p, &next_p, 0); + sym_driver_setup.excludes[xi++] = val; + p = next_p; + } + + if (safe_string) { + if (*safe_string == 'y') { + sym_driver_setup.max_tag = 0; + sym_driver_setup.burst_order = 0; + sym_driver_setup.scsi_led = 0; + sym_driver_setup.scsi_diff = 1; + sym_driver_setup.irq_mode = 0; + sym_driver_setup.scsi_bus_check = 2; + sym_driver_setup.host_id = 7; + sym_driver_setup.verbose = 2; + sym_driver_setup.settle_delay = 10; + sym_driver_setup.use_nvram = 1; + } else if (*safe_string != 'n') { + printk(KERN_WARNING NAME53C8XX "Ignoring parameter %s" + " passed to safe option", safe_string); + } + } +} + +static struct scsi_transport_template *sym2_transport_template = NULL; + +/* + * Driver private area in the SCSI command structure. + */ +struct sym_ucmd { /* Override the SCSI pointer structure */ + struct completion *eh_done; /* SCSI error handling */ +}; + +#define SYM_UCMD_PTR(cmd) ((struct sym_ucmd *)(&(cmd)->SCp)) +#define SYM_SOFTC_PTR(cmd) sym_get_hcb(cmd->device->host) + +/* + * Complete a pending CAM CCB. + */ +void sym_xpt_done(struct sym_hcb *np, struct scsi_cmnd *cmd) +{ + struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd); + BUILD_BUG_ON(sizeof(struct scsi_pointer) < sizeof(struct sym_ucmd)); + + if (ucmd->eh_done) + complete(ucmd->eh_done); + + scsi_dma_unmap(cmd); + cmd->scsi_done(cmd); +} + +/* + * Tell the SCSI layer about a BUS RESET. + */ +void sym_xpt_async_bus_reset(struct sym_hcb *np) +{ + printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np)); + np->s.settle_time = jiffies + sym_driver_setup.settle_delay * HZ; + np->s.settle_time_valid = 1; + if (sym_verbose >= 2) + printf_info("%s: command processing suspended for %d seconds\n", + sym_name(np), sym_driver_setup.settle_delay); +} + +/* + * Choose the more appropriate CAM status if + * the IO encountered an extended error. + */ +static int sym_xerr_cam_status(int cam_status, int x_status) +{ + if (x_status) { + if (x_status & XE_PARITY_ERR) + cam_status = DID_PARITY; + else + cam_status = DID_ERROR; + } + return cam_status; +} + +/* + * Build CAM result for a failed or auto-sensed IO. + */ +void sym_set_cam_result_error(struct sym_hcb *np, struct sym_ccb *cp, int resid) +{ + struct scsi_cmnd *cmd = cp->cmd; + u_int cam_status, scsi_status, drv_status; + + drv_status = 0; + cam_status = DID_OK; + scsi_status = cp->ssss_status; + + if (cp->host_flags & HF_SENSE) { + scsi_status = cp->sv_scsi_status; + resid = cp->sv_resid; + if (sym_verbose && cp->sv_xerr_status) + sym_print_xerr(cmd, cp->sv_xerr_status); + if (cp->host_status == HS_COMPLETE && + cp->ssss_status == S_GOOD && + cp->xerr_status == 0) { + cam_status = sym_xerr_cam_status(DID_OK, + cp->sv_xerr_status); + drv_status = DRIVER_SENSE; + /* + * Bounce back the sense data to user. + */ + memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); + memcpy(cmd->sense_buffer, cp->sns_bbuf, + min(SCSI_SENSE_BUFFERSIZE, SYM_SNS_BBUF_LEN)); +#if 0 + /* + * If the device reports a UNIT ATTENTION condition + * due to a RESET condition, we should consider all + * disconnect CCBs for this unit as aborted. + */ + if (1) { + u_char *p; + p = (u_char *) cmd->sense_data; + if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29) + sym_clear_tasks(np, DID_ABORT, + cp->target,cp->lun, -1); + } +#endif + } else { + /* + * Error return from our internal request sense. This + * is bad: we must clear the contingent allegiance + * condition otherwise the device will always return + * BUSY. Use a big stick. + */ + sym_reset_scsi_target(np, cmd->device->id); + cam_status = DID_ERROR; + } + } else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */ + cam_status = DID_OK; + else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */ + cam_status = DID_NO_CONNECT; + else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/ + cam_status = DID_ERROR; + else { /* Extended error */ + if (sym_verbose) { + sym_print_addr(cmd, "COMMAND FAILED (%x %x %x).\n", + cp->host_status, cp->ssss_status, + cp->xerr_status); + } + /* + * Set the most appropriate value for CAM status. + */ + cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status); + } + scsi_set_resid(cmd, resid); + cmd->result = (drv_status << 24) | (cam_status << 16) | scsi_status; +} + +static int sym_scatter(struct sym_hcb *np, struct sym_ccb *cp, struct scsi_cmnd *cmd) +{ + int segment; + int use_sg; + + cp->data_len = 0; + + use_sg = scsi_dma_map(cmd); + if (use_sg > 0) { + struct scatterlist *sg; + struct sym_tcb *tp = &np->target[cp->target]; + struct sym_tblmove *data; + + if (use_sg > SYM_CONF_MAX_SG) { + scsi_dma_unmap(cmd); + return -1; + } + + data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg]; + + scsi_for_each_sg(cmd, sg, use_sg, segment) { + dma_addr_t baddr = sg_dma_address(sg); + unsigned int len = sg_dma_len(sg); + + if ((len & 1) && (tp->head.wval & EWS)) { + len++; + cp->odd_byte_adjustment++; + } + + sym_build_sge(np, &data[segment], baddr, len); + cp->data_len += len; + } + } else { + segment = -2; + } + + return segment; +} + +/* + * Queue a SCSI command. + */ +static int sym_queue_command(struct sym_hcb *np, struct scsi_cmnd *cmd) +{ + struct scsi_device *sdev = cmd->device; + struct sym_tcb *tp; + struct sym_lcb *lp; + struct sym_ccb *cp; + int order; + + /* + * Retrieve the target descriptor. + */ + tp = &np->target[sdev->id]; + + /* + * Select tagged/untagged. + */ + lp = sym_lp(tp, sdev->lun); + order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0; + + /* + * Queue the SCSI IO. + */ + cp = sym_get_ccb(np, cmd, order); + if (!cp) + return 1; /* Means resource shortage */ + sym_queue_scsiio(np, cmd, cp); + return 0; +} + +/* + * Setup buffers and pointers that address the CDB. + */ +static inline int sym_setup_cdb(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp) +{ + memcpy(cp->cdb_buf, cmd->cmnd, cmd->cmd_len); + + cp->phys.cmd.addr = CCB_BA(cp, cdb_buf[0]); + cp->phys.cmd.size = cpu_to_scr(cmd->cmd_len); + + return 0; +} + +/* + * Setup pointers that address the data and start the I/O. + */ +int sym_setup_data_and_start(struct sym_hcb *np, struct scsi_cmnd *cmd, struct sym_ccb *cp) +{ + u32 lastp, goalp; + int dir; + + /* + * Build the CDB. + */ + if (sym_setup_cdb(np, cmd, cp)) + goto out_abort; + + /* + * No direction means no data. + */ + dir = cmd->sc_data_direction; + if (dir != DMA_NONE) { + cp->segments = sym_scatter(np, cp, cmd); + if (cp->segments < 0) { + sym_set_cam_status(cmd, DID_ERROR); + goto out_abort; + } + + /* + * No segments means no data. + */ + if (!cp->segments) + dir = DMA_NONE; + } else { + cp->data_len = 0; + cp->segments = 0; + } + + /* + * Set the data pointer. + */ + switch (dir) { + case DMA_BIDIRECTIONAL: + scmd_printk(KERN_INFO, cmd, "got DMA_BIDIRECTIONAL command"); + sym_set_cam_status(cmd, DID_ERROR); + goto out_abort; + case DMA_TO_DEVICE: + goalp = SCRIPTA_BA(np, data_out2) + 8; + lastp = goalp - 8 - (cp->segments * (2*4)); + break; + case DMA_FROM_DEVICE: + cp->host_flags |= HF_DATA_IN; + goalp = SCRIPTA_BA(np, data_in2) + 8; + lastp = goalp - 8 - (cp->segments * (2*4)); + break; + case DMA_NONE: + default: + lastp = goalp = SCRIPTB_BA(np, no_data); + break; + } + + /* + * Set all pointers values needed by SCRIPTS. + */ + cp->phys.head.lastp = cpu_to_scr(lastp); + cp->phys.head.savep = cpu_to_scr(lastp); + cp->startp = cp->phys.head.savep; + cp->goalp = cpu_to_scr(goalp); + + /* + * When `#ifed 1', the code below makes the driver + * panic on the first attempt to write to a SCSI device. + * It is the first test we want to do after a driver + * change that does not seem obviously safe. :) + */ +#if 0 + switch (cp->cdb_buf[0]) { + case 0x0A: case 0x2A: case 0xAA: + panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n"); + break; + default: + break; + } +#endif + + /* + * activate this job. + */ + sym_put_start_queue(np, cp); + return 0; + +out_abort: + sym_free_ccb(np, cp); + sym_xpt_done(np, cmd); + return 0; +} + + +/* + * timer daemon. + * + * Misused to keep the driver running when + * interrupts are not configured correctly. + */ +static void sym_timer(struct sym_hcb *np) +{ + unsigned long thistime = jiffies; + + /* + * Restart the timer. + */ + np->s.timer.expires = thistime + SYM_CONF_TIMER_INTERVAL; + add_timer(&np->s.timer); + + /* + * If we are resetting the ncr, wait for settle_time before + * clearing it. Then command processing will be resumed. + */ + if (np->s.settle_time_valid) { + if (time_before_eq(np->s.settle_time, thistime)) { + if (sym_verbose >= 2 ) + printk("%s: command processing resumed\n", + sym_name(np)); + np->s.settle_time_valid = 0; + } + return; + } + + /* + * Nothing to do for now, but that may come. + */ + if (np->s.lasttime + 4*HZ < thistime) { + np->s.lasttime = thistime; + } + +#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS + /* + * Some way-broken PCI bridges may lead to + * completions being lost when the clearing + * of the INTFLY flag by the CPU occurs + * concurrently with the chip raising this flag. + * If this ever happen, lost completions will + * be reaped here. + */ + sym_wakeup_done(np); +#endif +} + + +/* + * PCI BUS error handler. + */ +void sym_log_bus_error(struct Scsi_Host *shost) +{ + struct sym_data *sym_data = shost_priv(shost); + struct pci_dev *pdev = sym_data->pdev; + unsigned short pci_sts; + pci_read_config_word(pdev, PCI_STATUS, &pci_sts); + if (pci_sts & 0xf900) { + pci_write_config_word(pdev, PCI_STATUS, pci_sts); + shost_printk(KERN_WARNING, shost, + "PCI bus error: status = 0x%04x\n", pci_sts & 0xf900); + } +} + +/* + * queuecommand method. Entered with the host adapter lock held and + * interrupts disabled. + */ +static int sym53c8xx_queue_command_lck(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + struct sym_hcb *np = SYM_SOFTC_PTR(cmd); + struct sym_ucmd *ucp = SYM_UCMD_PTR(cmd); + int sts = 0; + + cmd->scsi_done = done; + memset(ucp, 0, sizeof(*ucp)); + + /* + * Shorten our settle_time if needed for + * this command not to time out. + */ + if (np->s.settle_time_valid && cmd->request->timeout) { + unsigned long tlimit = jiffies + cmd->request->timeout; + tlimit -= SYM_CONF_TIMER_INTERVAL*2; + if (time_after(np->s.settle_time, tlimit)) { + np->s.settle_time = tlimit; + } + } + + if (np->s.settle_time_valid) + return SCSI_MLQUEUE_HOST_BUSY; + + sts = sym_queue_command(np, cmd); + if (sts) + return SCSI_MLQUEUE_HOST_BUSY; + return 0; +} + +static DEF_SCSI_QCMD(sym53c8xx_queue_command) + +/* + * Linux entry point of the interrupt handler. + */ +static irqreturn_t sym53c8xx_intr(int irq, void *dev_id) +{ + struct Scsi_Host *shost = dev_id; + struct sym_data *sym_data = shost_priv(shost); + irqreturn_t result; + + /* Avoid spinloop trying to handle interrupts on frozen device */ + if (pci_channel_offline(sym_data->pdev)) + return IRQ_NONE; + + if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("["); + + spin_lock(shost->host_lock); + result = sym_interrupt(shost); + spin_unlock(shost->host_lock); + + if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n"); + + return result; +} + +/* + * Linux entry point of the timer handler + */ +static void sym53c8xx_timer(struct timer_list *t) +{ + struct sym_hcb *np = from_timer(np, t, s.timer); + unsigned long flags; + + spin_lock_irqsave(np->s.host->host_lock, flags); + sym_timer(np); + spin_unlock_irqrestore(np->s.host->host_lock, flags); +} + + +/* + * What the eh thread wants us to perform. + */ +#define SYM_EH_ABORT 0 +#define SYM_EH_DEVICE_RESET 1 +#define SYM_EH_BUS_RESET 2 +#define SYM_EH_HOST_RESET 3 + +/* + * Generic method for our eh processing. + * The 'op' argument tells what we have to do. + */ +static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd) +{ + struct sym_ucmd *ucmd = SYM_UCMD_PTR(cmd); + struct Scsi_Host *shost = cmd->device->host; + struct sym_data *sym_data = shost_priv(shost); + struct pci_dev *pdev = sym_data->pdev; + struct sym_hcb *np = sym_data->ncb; + SYM_QUEHEAD *qp; + int cmd_queued = 0; + int sts = -1; + struct completion eh_done; + + scmd_printk(KERN_WARNING, cmd, "%s operation started\n", opname); + + /* We may be in an error condition because the PCI bus + * went down. In this case, we need to wait until the + * PCI bus is reset, the card is reset, and only then + * proceed with the scsi error recovery. There's no + * point in hurrying; take a leisurely wait. + */ +#define WAIT_FOR_PCI_RECOVERY 35 + if (pci_channel_offline(pdev)) { + int finished_reset = 0; + init_completion(&eh_done); + spin_lock_irq(shost->host_lock); + /* Make sure we didn't race */ + if (pci_channel_offline(pdev)) { + BUG_ON(sym_data->io_reset); + sym_data->io_reset = &eh_done; + } else { + finished_reset = 1; + } + spin_unlock_irq(shost->host_lock); + if (!finished_reset) + finished_reset = wait_for_completion_timeout + (sym_data->io_reset, + WAIT_FOR_PCI_RECOVERY*HZ); + spin_lock_irq(shost->host_lock); + sym_data->io_reset = NULL; + spin_unlock_irq(shost->host_lock); + if (!finished_reset) + return SCSI_FAILED; + } + + spin_lock_irq(shost->host_lock); + /* This one is queued in some place -> to wait for completion */ + FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) { + struct sym_ccb *cp = sym_que_entry(qp, struct sym_ccb, link_ccbq); + if (cp->cmd == cmd) { + cmd_queued = 1; + break; + } + } + + /* Try to proceed the operation we have been asked for */ + sts = -1; + switch(op) { + case SYM_EH_ABORT: + sts = sym_abort_scsiio(np, cmd, 1); + break; + case SYM_EH_DEVICE_RESET: + sts = sym_reset_scsi_target(np, cmd->device->id); + break; + case SYM_EH_BUS_RESET: + sym_reset_scsi_bus(np, 1); + sts = 0; + break; + case SYM_EH_HOST_RESET: + sym_reset_scsi_bus(np, 0); + sym_start_up(shost, 1); + sts = 0; + break; + default: + break; + } + + /* On error, restore everything and cross fingers :) */ + if (sts) + cmd_queued = 0; + + if (cmd_queued) { + init_completion(&eh_done); + ucmd->eh_done = &eh_done; + spin_unlock_irq(shost->host_lock); + if (!wait_for_completion_timeout(&eh_done, 5*HZ)) { + ucmd->eh_done = NULL; + sts = -2; + } + } else { + spin_unlock_irq(shost->host_lock); + } + + dev_warn(&cmd->device->sdev_gendev, "%s operation %s.\n", opname, + sts==0 ? "complete" :sts==-2 ? "timed-out" : "failed"); + return sts ? SCSI_FAILED : SCSI_SUCCESS; +} + + +/* + * Error handlers called from the eh thread (one thread per HBA). + */ +static int sym53c8xx_eh_abort_handler(struct scsi_cmnd *cmd) +{ + return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd); +} + +static int sym53c8xx_eh_device_reset_handler(struct scsi_cmnd *cmd) +{ + return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd); +} + +static int sym53c8xx_eh_bus_reset_handler(struct scsi_cmnd *cmd) +{ + return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd); +} + +static int sym53c8xx_eh_host_reset_handler(struct scsi_cmnd *cmd) +{ + return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd); +} + +/* + * Tune device queuing depth, according to various limits. + */ +static void sym_tune_dev_queuing(struct sym_tcb *tp, int lun, u_short reqtags) +{ + struct sym_lcb *lp = sym_lp(tp, lun); + u_short oldtags; + + if (!lp) + return; + + oldtags = lp->s.reqtags; + + if (reqtags > lp->s.scdev_depth) + reqtags = lp->s.scdev_depth; + + lp->s.reqtags = reqtags; + + if (reqtags != oldtags) { + dev_info(&tp->starget->dev, + "tagged command queuing %s, command queue depth %d.\n", + lp->s.reqtags ? "enabled" : "disabled", reqtags); + } +} + +static int sym53c8xx_slave_alloc(struct scsi_device *sdev) +{ + struct sym_hcb *np = sym_get_hcb(sdev->host); + struct sym_tcb *tp = &np->target[sdev->id]; + struct sym_lcb *lp; + unsigned long flags; + int error; + + if (sdev->id >= SYM_CONF_MAX_TARGET || sdev->lun >= SYM_CONF_MAX_LUN) + return -ENXIO; + + spin_lock_irqsave(np->s.host->host_lock, flags); + + /* + * Fail the device init if the device is flagged NOSCAN at BOOT in + * the NVRAM. This may speed up boot and maintain coherency with + * BIOS device numbering. Clearing the flag allows the user to + * rescan skipped devices later. We also return an error for + * devices not flagged for SCAN LUNS in the NVRAM since some single + * lun devices behave badly when asked for a non zero LUN. + */ + + if (tp->usrflags & SYM_SCAN_BOOT_DISABLED) { + tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED; + starget_printk(KERN_INFO, sdev->sdev_target, + "Scan at boot disabled in NVRAM\n"); + error = -ENXIO; + goto out; + } + + if (tp->usrflags & SYM_SCAN_LUNS_DISABLED) { + if (sdev->lun != 0) { + error = -ENXIO; + goto out; + } + starget_printk(KERN_INFO, sdev->sdev_target, + "Multiple LUNs disabled in NVRAM\n"); + } + + lp = sym_alloc_lcb(np, sdev->id, sdev->lun); + if (!lp) { + error = -ENOMEM; + goto out; + } + if (tp->nlcb == 1) + tp->starget = sdev->sdev_target; + + spi_min_period(tp->starget) = tp->usr_period; + spi_max_width(tp->starget) = tp->usr_width; + + error = 0; +out: + spin_unlock_irqrestore(np->s.host->host_lock, flags); + + return error; +} + +/* + * Linux entry point for device queue sizing. + */ +static int sym53c8xx_slave_configure(struct scsi_device *sdev) +{ + struct sym_hcb *np = sym_get_hcb(sdev->host); + struct sym_tcb *tp = &np->target[sdev->id]; + struct sym_lcb *lp = sym_lp(tp, sdev->lun); + int reqtags, depth_to_use; + + /* + * Get user flags. + */ + lp->curr_flags = lp->user_flags; + + /* + * Select queue depth from driver setup. + * Do not use more than configured by user. + * Use at least 1. + * Do not use more than our maximum. + */ + reqtags = sym_driver_setup.max_tag; + if (reqtags > tp->usrtags) + reqtags = tp->usrtags; + if (!sdev->tagged_supported) + reqtags = 0; + if (reqtags > SYM_CONF_MAX_TAG) + reqtags = SYM_CONF_MAX_TAG; + depth_to_use = reqtags ? reqtags : 1; + scsi_change_queue_depth(sdev, depth_to_use); + lp->s.scdev_depth = depth_to_use; + sym_tune_dev_queuing(tp, sdev->lun, reqtags); + + if (!spi_initial_dv(sdev->sdev_target)) + spi_dv_device(sdev); + + return 0; +} + +static void sym53c8xx_slave_destroy(struct scsi_device *sdev) +{ + struct sym_hcb *np = sym_get_hcb(sdev->host); + struct sym_tcb *tp = &np->target[sdev->id]; + struct sym_lcb *lp = sym_lp(tp, sdev->lun); + unsigned long flags; + + /* if slave_alloc returned before allocating a sym_lcb, return */ + if (!lp) + return; + + spin_lock_irqsave(np->s.host->host_lock, flags); + + if (lp->busy_itlq || lp->busy_itl) { + /* + * This really shouldn't happen, but we can't return an error + * so let's try to stop all on-going I/O. + */ + starget_printk(KERN_WARNING, tp->starget, + "Removing busy LCB (%d)\n", (u8)sdev->lun); + sym_reset_scsi_bus(np, 1); + } + + if (sym_free_lcb(np, sdev->id, sdev->lun) == 0) { + /* + * It was the last unit for this target. + */ + tp->head.sval = 0; + tp->head.wval = np->rv_scntl3; + tp->head.uval = 0; + tp->tgoal.check_nego = 1; + tp->starget = NULL; + } + + spin_unlock_irqrestore(np->s.host->host_lock, flags); +} + +/* + * Linux entry point for info() function + */ +static const char *sym53c8xx_info (struct Scsi_Host *host) +{ + return SYM_DRIVER_NAME; +} + + +#ifdef SYM_LINUX_PROC_INFO_SUPPORT +/* + * Proc file system stuff + * + * A read operation returns adapter information. + * A write operation is a control command. + * The string is parsed in the driver code and the command is passed + * to the sym_usercmd() function. + */ + +#ifdef SYM_LINUX_USER_COMMAND_SUPPORT + +struct sym_usrcmd { + u_long target; + u_long lun; + u_long data; + u_long cmd; +}; + +#define UC_SETSYNC 10 +#define UC_SETTAGS 11 +#define UC_SETDEBUG 12 +#define UC_SETWIDE 14 +#define UC_SETFLAG 15 +#define UC_SETVERBOSE 17 +#define UC_RESETDEV 18 +#define UC_CLEARDEV 19 + +static void sym_exec_user_command (struct sym_hcb *np, struct sym_usrcmd *uc) +{ + struct sym_tcb *tp; + int t, l; + + switch (uc->cmd) { + case 0: return; + +#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT + case UC_SETDEBUG: + sym_debug_flags = uc->data; + break; +#endif + case UC_SETVERBOSE: + np->verbose = uc->data; + break; + default: + /* + * We assume that other commands apply to targets. + * This should always be the case and avoid the below + * 4 lines to be repeated 6 times. + */ + for (t = 0; t < SYM_CONF_MAX_TARGET; t++) { + if (!((uc->target >> t) & 1)) + continue; + tp = &np->target[t]; + if (!tp->nlcb) + continue; + + switch (uc->cmd) { + + case UC_SETSYNC: + if (!uc->data || uc->data >= 255) { + tp->tgoal.iu = tp->tgoal.dt = + tp->tgoal.qas = 0; + tp->tgoal.offset = 0; + } else if (uc->data <= 9 && np->minsync_dt) { + if (uc->data < np->minsync_dt) + uc->data = np->minsync_dt; + tp->tgoal.iu = tp->tgoal.dt = + tp->tgoal.qas = 1; + tp->tgoal.width = 1; + tp->tgoal.period = uc->data; + tp->tgoal.offset = np->maxoffs_dt; + } else { + if (uc->data < np->minsync) + uc->data = np->minsync; + tp->tgoal.iu = tp->tgoal.dt = + tp->tgoal.qas = 0; + tp->tgoal.period = uc->data; + tp->tgoal.offset = np->maxoffs; + } + tp->tgoal.check_nego = 1; + break; + case UC_SETWIDE: + tp->tgoal.width = uc->data ? 1 : 0; + tp->tgoal.check_nego = 1; + break; + case UC_SETTAGS: + for (l = 0; l < SYM_CONF_MAX_LUN; l++) + sym_tune_dev_queuing(tp, l, uc->data); + break; + case UC_RESETDEV: + tp->to_reset = 1; + np->istat_sem = SEM; + OUTB(np, nc_istat, SIGP|SEM); + break; + case UC_CLEARDEV: + for (l = 0; l < SYM_CONF_MAX_LUN; l++) { + struct sym_lcb *lp = sym_lp(tp, l); + if (lp) lp->to_clear = 1; + } + np->istat_sem = SEM; + OUTB(np, nc_istat, SIGP|SEM); + break; + case UC_SETFLAG: + tp->usrflags = uc->data; + break; + } + } + break; + } +} + +static int sym_skip_spaces(char *ptr, int len) +{ + int cnt, c; + + for (cnt = len; cnt > 0 && (c = *ptr++) && isspace(c); cnt--); + + return (len - cnt); +} + +static int get_int_arg(char *ptr, int len, u_long *pv) +{ + char *end; + + *pv = simple_strtoul(ptr, &end, 10); + return (end - ptr); +} + +static int is_keyword(char *ptr, int len, char *verb) +{ + int verb_len = strlen(verb); + + if (len >= verb_len && !memcmp(verb, ptr, verb_len)) + return verb_len; + else + return 0; +} + +#define SKIP_SPACES(ptr, len) \ + if ((arg_len = sym_skip_spaces(ptr, len)) < 1) \ + return -EINVAL; \ + ptr += arg_len; len -= arg_len; + +#define GET_INT_ARG(ptr, len, v) \ + if (!(arg_len = get_int_arg(ptr, len, &(v)))) \ + return -EINVAL; \ + ptr += arg_len; len -= arg_len; + + +/* + * Parse a control command + */ + +static int sym_user_command(struct Scsi_Host *shost, char *buffer, int length) +{ + struct sym_hcb *np = sym_get_hcb(shost); + char *ptr = buffer; + int len = length; + struct sym_usrcmd cmd, *uc = &cmd; + int arg_len; + u_long target; + + memset(uc, 0, sizeof(*uc)); + + if (len > 0 && ptr[len-1] == '\n') + --len; + + if ((arg_len = is_keyword(ptr, len, "setsync")) != 0) + uc->cmd = UC_SETSYNC; + else if ((arg_len = is_keyword(ptr, len, "settags")) != 0) + uc->cmd = UC_SETTAGS; + else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0) + uc->cmd = UC_SETVERBOSE; + else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0) + uc->cmd = UC_SETWIDE; +#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT + else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0) + uc->cmd = UC_SETDEBUG; +#endif + else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0) + uc->cmd = UC_SETFLAG; + else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0) + uc->cmd = UC_RESETDEV; + else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0) + uc->cmd = UC_CLEARDEV; + else + arg_len = 0; + +#ifdef DEBUG_PROC_INFO +printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd); +#endif + + if (!arg_len) + return -EINVAL; + ptr += arg_len; len -= arg_len; + + switch(uc->cmd) { + case UC_SETSYNC: + case UC_SETTAGS: + case UC_SETWIDE: + case UC_SETFLAG: + case UC_RESETDEV: + case UC_CLEARDEV: + SKIP_SPACES(ptr, len); + if ((arg_len = is_keyword(ptr, len, "all")) != 0) { + ptr += arg_len; len -= arg_len; + uc->target = ~0; + } else { + GET_INT_ARG(ptr, len, target); + uc->target = (1<<target); +#ifdef DEBUG_PROC_INFO +printk("sym_user_command: target=%ld\n", target); +#endif + } + break; + } + + switch(uc->cmd) { + case UC_SETVERBOSE: + case UC_SETSYNC: + case UC_SETTAGS: + case UC_SETWIDE: + SKIP_SPACES(ptr, len); + GET_INT_ARG(ptr, len, uc->data); +#ifdef DEBUG_PROC_INFO +printk("sym_user_command: data=%ld\n", uc->data); +#endif + break; +#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT + case UC_SETDEBUG: + while (len > 0) { + SKIP_SPACES(ptr, len); + if ((arg_len = is_keyword(ptr, len, "alloc"))) + uc->data |= DEBUG_ALLOC; + else if ((arg_len = is_keyword(ptr, len, "phase"))) + uc->data |= DEBUG_PHASE; + else if ((arg_len = is_keyword(ptr, len, "queue"))) + uc->data |= DEBUG_QUEUE; + else if ((arg_len = is_keyword(ptr, len, "result"))) + uc->data |= DEBUG_RESULT; + else if ((arg_len = is_keyword(ptr, len, "scatter"))) + uc->data |= DEBUG_SCATTER; + else if ((arg_len = is_keyword(ptr, len, "script"))) + uc->data |= DEBUG_SCRIPT; + else if ((arg_len = is_keyword(ptr, len, "tiny"))) + uc->data |= DEBUG_TINY; + else if ((arg_len = is_keyword(ptr, len, "timing"))) + uc->data |= DEBUG_TIMING; + else if ((arg_len = is_keyword(ptr, len, "nego"))) + uc->data |= DEBUG_NEGO; + else if ((arg_len = is_keyword(ptr, len, "tags"))) + uc->data |= DEBUG_TAGS; + else if ((arg_len = is_keyword(ptr, len, "pointer"))) + uc->data |= DEBUG_POINTER; + else + return -EINVAL; + ptr += arg_len; len -= arg_len; + } +#ifdef DEBUG_PROC_INFO +printk("sym_user_command: data=%ld\n", uc->data); +#endif + break; +#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */ + case UC_SETFLAG: + while (len > 0) { + SKIP_SPACES(ptr, len); + if ((arg_len = is_keyword(ptr, len, "no_disc"))) + uc->data &= ~SYM_DISC_ENABLED; + else + return -EINVAL; + ptr += arg_len; len -= arg_len; + } + break; + default: + break; + } + + if (len) + return -EINVAL; + else { + unsigned long flags; + + spin_lock_irqsave(shost->host_lock, flags); + sym_exec_user_command(np, uc); + spin_unlock_irqrestore(shost->host_lock, flags); + } + return length; +} + +#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */ + + +/* + * Copy formatted information into the input buffer. + */ +static int sym_show_info(struct seq_file *m, struct Scsi_Host *shost) +{ +#ifdef SYM_LINUX_USER_INFO_SUPPORT + struct sym_data *sym_data = shost_priv(shost); + struct pci_dev *pdev = sym_data->pdev; + struct sym_hcb *np = sym_data->ncb; + + seq_printf(m, "Chip " NAME53C "%s, device id 0x%x, " + "revision id 0x%x\n", np->s.chip_name, + pdev->device, pdev->revision); + seq_printf(m, "At PCI address %s, IRQ %u\n", + pci_name(pdev), pdev->irq); + seq_printf(m, "Min. period factor %d, %s SCSI BUS%s\n", + (int) (np->minsync_dt ? np->minsync_dt : np->minsync), + np->maxwide ? "Wide" : "Narrow", + np->minsync_dt ? ", DT capable" : ""); + + seq_printf(m, "Max. started commands %d, " + "max. commands per LUN %d\n", + SYM_CONF_MAX_START, SYM_CONF_MAX_TAG); + + return 0; +#else + return -EINVAL; +#endif /* SYM_LINUX_USER_INFO_SUPPORT */ +} + +#endif /* SYM_LINUX_PROC_INFO_SUPPORT */ + +/* + * Free resources claimed by sym_iomap_device(). Note that + * sym_free_resources() should be used instead of this function after calling + * sym_attach(). + */ +static void sym_iounmap_device(struct sym_device *device) +{ + if (device->s.ioaddr) + pci_iounmap(device->pdev, device->s.ioaddr); + if (device->s.ramaddr) + pci_iounmap(device->pdev, device->s.ramaddr); +} + +/* + * Free controller resources. + */ +static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev, + int do_free_irq) +{ + /* + * Free O/S specific resources. + */ + if (do_free_irq) + free_irq(pdev->irq, np->s.host); + if (np->s.ioaddr) + pci_iounmap(pdev, np->s.ioaddr); + if (np->s.ramaddr) + pci_iounmap(pdev, np->s.ramaddr); + /* + * Free O/S independent resources. + */ + sym_hcb_free(np); + + sym_mfree_dma(np, sizeof(*np), "HCB"); +} + +/* + * Host attach and initialisations. + * + * Allocate host data and ncb structure. + * Remap MMIO region. + * Do chip initialization. + * If all is OK, install interrupt handling and + * start the timer daemon. + */ +static struct Scsi_Host *sym_attach(struct scsi_host_template *tpnt, int unit, + struct sym_device *dev) +{ + struct sym_data *sym_data; + struct sym_hcb *np = NULL; + struct Scsi_Host *shost = NULL; + struct pci_dev *pdev = dev->pdev; + unsigned long flags; + struct sym_fw *fw; + int do_free_irq = 0; + + printk(KERN_INFO "sym%d: <%s> rev 0x%x at pci %s irq %u\n", + unit, dev->chip.name, pdev->revision, pci_name(pdev), + pdev->irq); + + /* + * Get the firmware for this chip. + */ + fw = sym_find_firmware(&dev->chip); + if (!fw) + goto attach_failed; + + shost = scsi_host_alloc(tpnt, sizeof(*sym_data)); + if (!shost) + goto attach_failed; + sym_data = shost_priv(shost); + + /* + * Allocate immediately the host control block, + * since we are only expecting to succeed. :) + * We keep track in the HCB of all the resources that + * are to be released on error. + */ + np = __sym_calloc_dma(&pdev->dev, sizeof(*np), "HCB"); + if (!np) + goto attach_failed; + np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */ + sym_data->ncb = np; + sym_data->pdev = pdev; + np->s.host = shost; + + pci_set_drvdata(pdev, shost); + + /* + * Copy some useful infos to the HCB. + */ + np->hcb_ba = vtobus(np); + np->verbose = sym_driver_setup.verbose; + np->s.unit = unit; + np->features = dev->chip.features; + np->clock_divn = dev->chip.nr_divisor; + np->maxoffs = dev->chip.offset_max; + np->maxburst = dev->chip.burst_max; + np->myaddr = dev->host_id; + np->mmio_ba = (u32)dev->mmio_base; + np->ram_ba = (u32)dev->ram_base; + np->s.ioaddr = dev->s.ioaddr; + np->s.ramaddr = dev->s.ramaddr; + + /* + * Edit its name. + */ + strlcpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name)); + sprintf(np->s.inst_name, "sym%d", np->s.unit); + + if ((SYM_CONF_DMA_ADDRESSING_MODE > 0) && (np->features & FE_DAC) && + !dma_set_mask(&pdev->dev, DMA_DAC_MASK)) { + set_dac(np); + } else if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) { + printf_warning("%s: No suitable DMA available\n", sym_name(np)); + goto attach_failed; + } + + if (sym_hcb_attach(shost, fw, dev->nvram)) + goto attach_failed; + + /* + * Install the interrupt handler. + * If we synchonize the C code with SCRIPTS on interrupt, + * we do not want to share the INTR line at all. + */ + if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, + shost)) { + printf_err("%s: request irq %u failure\n", + sym_name(np), pdev->irq); + goto attach_failed; + } + do_free_irq = 1; + + /* + * After SCSI devices have been opened, we cannot + * reset the bus safely, so we do it here. + */ + spin_lock_irqsave(shost->host_lock, flags); + if (sym_reset_scsi_bus(np, 0)) + goto reset_failed; + + /* + * Start the SCRIPTS. + */ + sym_start_up(shost, 1); + + /* + * Start the timer daemon + */ + timer_setup(&np->s.timer, sym53c8xx_timer, 0); + np->s.lasttime=0; + sym_timer (np); + + /* + * Fill Linux host instance structure + * and return success. + */ + shost->max_channel = 0; + shost->this_id = np->myaddr; + shost->max_id = np->maxwide ? 16 : 8; + shost->max_lun = SYM_CONF_MAX_LUN; + shost->unique_id = pci_resource_start(pdev, 0); + shost->cmd_per_lun = SYM_CONF_MAX_TAG; + shost->can_queue = (SYM_CONF_MAX_START-2); + shost->sg_tablesize = SYM_CONF_MAX_SG; + shost->max_cmd_len = 16; + BUG_ON(sym2_transport_template == NULL); + shost->transportt = sym2_transport_template; + + /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */ + if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2) + shost->dma_boundary = 0xFFFFFF; + + spin_unlock_irqrestore(shost->host_lock, flags); + + return shost; + + reset_failed: + printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, " + "TERMINATION, DEVICE POWER etc.!\n", sym_name(np)); + spin_unlock_irqrestore(shost->host_lock, flags); + attach_failed: + printf_info("sym%d: giving up ...\n", unit); + if (np) + sym_free_resources(np, pdev, do_free_irq); + else + sym_iounmap_device(dev); + if (shost) + scsi_host_put(shost); + + return NULL; +} + + +/* + * Detect and try to read SYMBIOS and TEKRAM NVRAM. + */ +#if SYM_CONF_NVRAM_SUPPORT +static void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp) +{ + devp->nvram = nvp; + nvp->type = 0; + + sym_read_nvram(devp, nvp); +} +#else +static inline void sym_get_nvram(struct sym_device *devp, struct sym_nvram *nvp) +{ +} +#endif /* SYM_CONF_NVRAM_SUPPORT */ + +static int sym_check_supported(struct sym_device *device) +{ + struct sym_chip *chip; + struct pci_dev *pdev = device->pdev; + unsigned long io_port = pci_resource_start(pdev, 0); + int i; + + /* + * If user excluded this chip, do not initialize it. + * I hate this code so much. Must kill it. + */ + if (io_port) { + for (i = 0 ; i < 8 ; i++) { + if (sym_driver_setup.excludes[i] == io_port) + return -ENODEV; + } + } + + /* + * Check if the chip is supported. Then copy the chip description + * to our device structure so we can make it match the actual device + * and options. + */ + chip = sym_lookup_chip_table(pdev->device, pdev->revision); + if (!chip) { + dev_info(&pdev->dev, "device not supported\n"); + return -ENODEV; + } + memcpy(&device->chip, chip, sizeof(device->chip)); + + return 0; +} + +/* + * Ignore Symbios chips controlled by various RAID controllers. + * These controllers set value 0x52414944 at RAM end - 16. + */ +static int sym_check_raid(struct sym_device *device) +{ + unsigned int ram_size, ram_val; + + if (!device->s.ramaddr) + return 0; + + if (device->chip.features & FE_RAM8K) + ram_size = 8192; + else + ram_size = 4096; + + ram_val = readl(device->s.ramaddr + ram_size - 16); + if (ram_val != 0x52414944) + return 0; + + dev_info(&device->pdev->dev, + "not initializing, driven by RAID controller.\n"); + return -ENODEV; +} + +static int sym_set_workarounds(struct sym_device *device) +{ + struct sym_chip *chip = &device->chip; + struct pci_dev *pdev = device->pdev; + u_short status_reg; + + /* + * (ITEM 12 of a DEL about the 896 I haven't yet). + * We must ensure the chip will use WRITE AND INVALIDATE. + * The revision number limit is for now arbitrary. + */ + if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 0x4) { + chip->features |= (FE_WRIE | FE_CLSE); + } + + /* If the chip can do Memory Write Invalidate, enable it */ + if (chip->features & FE_WRIE) { + if (pci_set_mwi(pdev)) + return -ENODEV; + } + + /* + * Work around for errant bit in 895A. The 66Mhz + * capable bit is set erroneously. Clear this bit. + * (Item 1 DEL 533) + * + * Make sure Config space and Features agree. + * + * Recall: writes are not normal to status register - + * write a 1 to clear and a 0 to leave unchanged. + * Can only reset bits. + */ + pci_read_config_word(pdev, PCI_STATUS, &status_reg); + if (chip->features & FE_66MHZ) { + if (!(status_reg & PCI_STATUS_66MHZ)) + chip->features &= ~FE_66MHZ; + } else { + if (status_reg & PCI_STATUS_66MHZ) { + status_reg = PCI_STATUS_66MHZ; + pci_write_config_word(pdev, PCI_STATUS, status_reg); + pci_read_config_word(pdev, PCI_STATUS, &status_reg); + } + } + + return 0; +} + +/* + * Map HBA registers and on-chip SRAM (if present). + */ +static int sym_iomap_device(struct sym_device *device) +{ + struct pci_dev *pdev = device->pdev; + struct pci_bus_region bus_addr; + int i = 2; + + pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]); + device->mmio_base = bus_addr.start; + + if (device->chip.features & FE_RAM) { + /* + * If the BAR is 64-bit, resource 2 will be occupied by the + * upper 32 bits + */ + if (!pdev->resource[i].flags) + i++; + pcibios_resource_to_bus(pdev->bus, &bus_addr, + &pdev->resource[i]); + device->ram_base = bus_addr.start; + } + +#ifdef CONFIG_SCSI_SYM53C8XX_MMIO + if (device->mmio_base) + device->s.ioaddr = pci_iomap(pdev, 1, + pci_resource_len(pdev, 1)); +#endif + if (!device->s.ioaddr) + device->s.ioaddr = pci_iomap(pdev, 0, + pci_resource_len(pdev, 0)); + if (!device->s.ioaddr) { + dev_err(&pdev->dev, "could not map registers; giving up.\n"); + return -EIO; + } + if (device->ram_base) { + device->s.ramaddr = pci_iomap(pdev, i, + pci_resource_len(pdev, i)); + if (!device->s.ramaddr) { + dev_warn(&pdev->dev, + "could not map SRAM; continuing anyway.\n"); + device->ram_base = 0; + } + } + + return 0; +} + +/* + * The NCR PQS and PDS cards are constructed as a DEC bridge + * behind which sits a proprietary NCR memory controller and + * either four or two 53c875s as separate devices. We can tell + * if an 875 is part of a PQS/PDS or not since if it is, it will + * be on the same bus as the memory controller. In its usual + * mode of operation, the 875s are slaved to the memory + * controller for all transfers. To operate with the Linux + * driver, the memory controller is disabled and the 875s + * freed to function independently. The only wrinkle is that + * the preset SCSI ID (which may be zero) must be read in from + * a special configuration space register of the 875. + */ +static void sym_config_pqs(struct pci_dev *pdev, struct sym_device *sym_dev) +{ + int slot; + u8 tmp; + + for (slot = 0; slot < 256; slot++) { + struct pci_dev *memc = pci_get_slot(pdev->bus, slot); + + if (!memc || memc->vendor != 0x101a || memc->device == 0x0009) { + pci_dev_put(memc); + continue; + } + + /* bit 1: allow individual 875 configuration */ + pci_read_config_byte(memc, 0x44, &tmp); + if ((tmp & 0x2) == 0) { + tmp |= 0x2; + pci_write_config_byte(memc, 0x44, tmp); + } + + /* bit 2: drive individual 875 interrupts to the bus */ + pci_read_config_byte(memc, 0x45, &tmp); + if ((tmp & 0x4) == 0) { + tmp |= 0x4; + pci_write_config_byte(memc, 0x45, tmp); + } + + pci_dev_put(memc); + break; + } + + pci_read_config_byte(pdev, 0x84, &tmp); + sym_dev->host_id = tmp; +} + +/* + * Called before unloading the module. + * Detach the host. + * We have to free resources and halt the NCR chip. + */ +static int sym_detach(struct Scsi_Host *shost, struct pci_dev *pdev) +{ + struct sym_hcb *np = sym_get_hcb(shost); + printk("%s: detaching ...\n", sym_name(np)); + + del_timer_sync(&np->s.timer); + + /* + * Reset NCR chip. + * We should use sym_soft_reset(), but we don't want to do + * so, since we may not be safe if interrupts occur. + */ + printk("%s: resetting chip\n", sym_name(np)); + OUTB(np, nc_istat, SRST); + INB(np, nc_mbox1); + udelay(10); + OUTB(np, nc_istat, 0); + + sym_free_resources(np, pdev, 1); + scsi_host_put(shost); + + return 1; +} + +/* + * Driver host template. + */ +static struct scsi_host_template sym2_template = { + .module = THIS_MODULE, + .name = "sym53c8xx", + .info = sym53c8xx_info, + .queuecommand = sym53c8xx_queue_command, + .slave_alloc = sym53c8xx_slave_alloc, + .slave_configure = sym53c8xx_slave_configure, + .slave_destroy = sym53c8xx_slave_destroy, + .eh_abort_handler = sym53c8xx_eh_abort_handler, + .eh_device_reset_handler = sym53c8xx_eh_device_reset_handler, + .eh_bus_reset_handler = sym53c8xx_eh_bus_reset_handler, + .eh_host_reset_handler = sym53c8xx_eh_host_reset_handler, + .this_id = 7, + .max_sectors = 0xFFFF, +#ifdef SYM_LINUX_PROC_INFO_SUPPORT + .show_info = sym_show_info, +#ifdef SYM_LINUX_USER_COMMAND_SUPPORT + .write_info = sym_user_command, +#endif + .proc_name = NAME53C8XX, +#endif +}; + +static int attach_count; + +static int sym2_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct sym_device sym_dev; + struct sym_nvram nvram; + struct Scsi_Host *shost; + int do_iounmap = 0; + int do_disable_device = 1; + + memset(&sym_dev, 0, sizeof(sym_dev)); + memset(&nvram, 0, sizeof(nvram)); + sym_dev.pdev = pdev; + sym_dev.host_id = SYM_SETUP_HOST_ID; + + if (pci_enable_device(pdev)) + goto leave; + + pci_set_master(pdev); + + if (pci_request_regions(pdev, NAME53C8XX)) + goto disable; + + if (sym_check_supported(&sym_dev)) + goto free; + + if (sym_iomap_device(&sym_dev)) + goto free; + do_iounmap = 1; + + if (sym_check_raid(&sym_dev)) { + do_disable_device = 0; /* Don't disable the device */ + goto free; + } + + if (sym_set_workarounds(&sym_dev)) + goto free; + + sym_config_pqs(pdev, &sym_dev); + + sym_get_nvram(&sym_dev, &nvram); + + do_iounmap = 0; /* Don't sym_iounmap_device() after sym_attach(). */ + shost = sym_attach(&sym2_template, attach_count, &sym_dev); + if (!shost) + goto free; + + if (scsi_add_host(shost, &pdev->dev)) + goto detach; + scsi_scan_host(shost); + + attach_count++; + + return 0; + + detach: + sym_detach(pci_get_drvdata(pdev), pdev); + free: + if (do_iounmap) + sym_iounmap_device(&sym_dev); + pci_release_regions(pdev); + disable: + if (do_disable_device) + pci_disable_device(pdev); + leave: + return -ENODEV; +} + +static void sym2_remove(struct pci_dev *pdev) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + + scsi_remove_host(shost); + sym_detach(shost, pdev); + pci_release_regions(pdev); + pci_disable_device(pdev); + + attach_count--; +} + +/** + * sym2_io_error_detected() - called when PCI error is detected + * @pdev: pointer to PCI device + * @state: current state of the PCI slot + */ +static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev, + pci_channel_state_t state) +{ + /* If slot is permanently frozen, turn everything off */ + if (state == pci_channel_io_perm_failure) { + sym2_remove(pdev); + return PCI_ERS_RESULT_DISCONNECT; + } + + disable_irq(pdev->irq); + pci_disable_device(pdev); + + /* Request that MMIO be enabled, so register dump can be taken. */ + return PCI_ERS_RESULT_CAN_RECOVER; +} + +/** + * sym2_io_slot_dump - Enable MMIO and dump debug registers + * @pdev: pointer to PCI device + */ +static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + + sym_dump_registers(shost); + + /* Request a slot reset. */ + return PCI_ERS_RESULT_NEED_RESET; +} + +/** + * sym2_reset_workarounds - hardware-specific work-arounds + * @pdev: pointer to PCI device + * + * This routine is similar to sym_set_workarounds(), except + * that, at this point, we already know that the device was + * successfully initialized at least once before, and so most + * of the steps taken there are un-needed here. + */ +static void sym2_reset_workarounds(struct pci_dev *pdev) +{ + u_short status_reg; + struct sym_chip *chip; + + chip = sym_lookup_chip_table(pdev->device, pdev->revision); + + /* Work around for errant bit in 895A, in a fashion + * similar to what is done in sym_set_workarounds(). + */ + pci_read_config_word(pdev, PCI_STATUS, &status_reg); + if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) { + status_reg = PCI_STATUS_66MHZ; + pci_write_config_word(pdev, PCI_STATUS, status_reg); + pci_read_config_word(pdev, PCI_STATUS, &status_reg); + } +} + +/** + * sym2_io_slot_reset() - called when the pci bus has been reset. + * @pdev: pointer to PCI device + * + * Restart the card from scratch. + */ +static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + struct sym_hcb *np = sym_get_hcb(shost); + + printk(KERN_INFO "%s: recovering from a PCI slot reset\n", + sym_name(np)); + + if (pci_enable_device(pdev)) { + printk(KERN_ERR "%s: Unable to enable after PCI reset\n", + sym_name(np)); + return PCI_ERS_RESULT_DISCONNECT; + } + + pci_set_master(pdev); + enable_irq(pdev->irq); + + /* If the chip can do Memory Write Invalidate, enable it */ + if (np->features & FE_WRIE) { + if (pci_set_mwi(pdev)) + return PCI_ERS_RESULT_DISCONNECT; + } + + /* Perform work-arounds, analogous to sym_set_workarounds() */ + sym2_reset_workarounds(pdev); + + /* Perform host reset only on one instance of the card */ + if (PCI_FUNC(pdev->devfn) == 0) { + if (sym_reset_scsi_bus(np, 0)) { + printk(KERN_ERR "%s: Unable to reset scsi host\n", + sym_name(np)); + return PCI_ERS_RESULT_DISCONNECT; + } + sym_start_up(shost, 1); + } + + return PCI_ERS_RESULT_RECOVERED; +} + +/** + * sym2_io_resume() - resume normal ops after PCI reset + * @pdev: pointer to PCI device + * + * Called when the error recovery driver tells us that its + * OK to resume normal operation. Use completion to allow + * halted scsi ops to resume. + */ +static void sym2_io_resume(struct pci_dev *pdev) +{ + struct Scsi_Host *shost = pci_get_drvdata(pdev); + struct sym_data *sym_data = shost_priv(shost); + + spin_lock_irq(shost->host_lock); + if (sym_data->io_reset) + complete(sym_data->io_reset); + spin_unlock_irq(shost->host_lock); +} + +static void sym2_get_signalling(struct Scsi_Host *shost) +{ + struct sym_hcb *np = sym_get_hcb(shost); + enum spi_signal_type type; + + switch (np->scsi_mode) { + case SMODE_SE: + type = SPI_SIGNAL_SE; + break; + case SMODE_LVD: + type = SPI_SIGNAL_LVD; + break; + case SMODE_HVD: + type = SPI_SIGNAL_HVD; + break; + default: + type = SPI_SIGNAL_UNKNOWN; + break; + } + spi_signalling(shost) = type; +} + +static void sym2_set_offset(struct scsi_target *starget, int offset) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + tp->tgoal.offset = offset; + tp->tgoal.check_nego = 1; +} + +static void sym2_set_period(struct scsi_target *starget, int period) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + /* have to have DT for these transfers, but DT will also + * set width, so check that this is allowed */ + if (period <= np->minsync && spi_width(starget)) + tp->tgoal.dt = 1; + + tp->tgoal.period = period; + tp->tgoal.check_nego = 1; +} + +static void sym2_set_width(struct scsi_target *starget, int width) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + /* It is illegal to have DT set on narrow transfers. If DT is + * clear, we must also clear IU and QAS. */ + if (width == 0) + tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0; + + tp->tgoal.width = width; + tp->tgoal.check_nego = 1; +} + +static void sym2_set_dt(struct scsi_target *starget, int dt) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + /* We must clear QAS and IU if DT is clear */ + if (dt) + tp->tgoal.dt = 1; + else + tp->tgoal.iu = tp->tgoal.dt = tp->tgoal.qas = 0; + tp->tgoal.check_nego = 1; +} + +#if 0 +static void sym2_set_iu(struct scsi_target *starget, int iu) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + if (iu) + tp->tgoal.iu = tp->tgoal.dt = 1; + else + tp->tgoal.iu = 0; + tp->tgoal.check_nego = 1; +} + +static void sym2_set_qas(struct scsi_target *starget, int qas) +{ + struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); + struct sym_hcb *np = sym_get_hcb(shost); + struct sym_tcb *tp = &np->target[starget->id]; + + if (qas) + tp->tgoal.dt = tp->tgoal.qas = 1; + else + tp->tgoal.qas = 0; + tp->tgoal.check_nego = 1; +} +#endif + +static struct spi_function_template sym2_transport_functions = { + .set_offset = sym2_set_offset, + .show_offset = 1, + .set_period = sym2_set_period, + .show_period = 1, + .set_width = sym2_set_width, + .show_width = 1, + .set_dt = sym2_set_dt, + .show_dt = 1, +#if 0 + .set_iu = sym2_set_iu, + .show_iu = 1, + .set_qas = sym2_set_qas, + .show_qas = 1, +#endif + .get_signalling = sym2_get_signalling, +}; + +static struct pci_device_id sym2_id_table[] = { + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C810, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C820, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */ + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C825, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C815, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C810AP, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, /* new */ + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C860, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1510, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C896, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C895, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C885, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C1510, + PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_SCSI<<8, 0xffff00, 0UL }, /* new */ + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C895A, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C875A, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_33, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_LSI_53C1010_66, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_NCR_53C875J, + PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0UL }, + { 0, } +}; + +MODULE_DEVICE_TABLE(pci, sym2_id_table); + +static const struct pci_error_handlers sym2_err_handler = { + .error_detected = sym2_io_error_detected, + .mmio_enabled = sym2_io_slot_dump, + .slot_reset = sym2_io_slot_reset, + .resume = sym2_io_resume, +}; + +static struct pci_driver sym2_driver = { + .name = NAME53C8XX, + .id_table = sym2_id_table, + .probe = sym2_probe, + .remove = sym2_remove, + .err_handler = &sym2_err_handler, +}; + +static int __init sym2_init(void) +{ + int error; + + sym2_setup_params(); + sym2_transport_template = spi_attach_transport(&sym2_transport_functions); + if (!sym2_transport_template) + return -ENODEV; + + error = pci_register_driver(&sym2_driver); + if (error) + spi_release_transport(sym2_transport_template); + return error; +} + +static void __exit sym2_exit(void) +{ + pci_unregister_driver(&sym2_driver); + spi_release_transport(sym2_transport_template); +} + +module_init(sym2_init); +module_exit(sym2_exit); |