// 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 * Copyright (c) 2003-2005 Matthew Wilcox * * 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 * Stefan Esser * Copyright (C) 1994 Wolfgang Stanglmeier * * Other major contributions: * * NVRAM detection and reading. * Copyright (C) 1997 Richard Waltham * *----------------------------------------------------------------------------- */ #include #include #include #include #include #include #include #include #include #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 "); 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; 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); /* * 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 = (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 && scsi_cmd_to_rq(cmd)->timeout) { unsigned long tlimit = jiffies + scsi_cmd_to_rq(cmd)->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<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);