--- /dev/null
+/*
+ * linux/drivers/acorn/scsi/fas216.c
+ *
+ * Copyright (C) 1997-2003 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and
+ * other sources, including:
+ * the AMD Am53CF94 data sheet
+ * the AMD Am53C94 data sheet
+ *
+ * This is a generic driver. To use it, have a look at cumana_2.c. You
+ * should define your own structure that overlays FAS216_Info, eg:
+ * struct my_host_data {
+ * FAS216_Info info;
+ * ... my host specific data ...
+ * };
+ *
+ * Changelog:
+ * 30-08-1997 RMK Created
+ * 14-09-1997 RMK Started disconnect support
+ * 08-02-1998 RMK Corrected real DMA support
+ * 15-02-1998 RMK Started sync xfer support
+ * 06-04-1998 RMK Tightened conditions for printing incomplete
+ * transfers
+ * 02-05-1998 RMK Added extra checks in fas216_reset
+ * 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns
+ * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h
+ * 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT
+ * 02-04-2000 RMK Converted to use the new error handling, and
+ * automatically request sense data upon check
+ * condition status from targets.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ecard.h>
+
+#include "../scsi.h"
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_host.h>
+#include "fas216.h"
+#include "scsi.h"
+
+/* NOTE: SCSI2 Synchronous transfers *require* DMA according to
+ * the data sheet. This restriction is crazy, especially when
+ * you only want to send 16 bytes! What were the guys who
+ * designed this chip on at that time? Did they read the SCSI2
+ * spec at all? The following sections are taken from the SCSI2
+ * standard (s2r10) concerning this:
+ *
+ * > IMPLEMENTORS NOTES:
+ * > (1) Re-negotiation at every selection is not recommended, since a
+ * > significant performance impact is likely.
+ *
+ * > The implied synchronous agreement shall remain in effect until a BUS DEVICE
+ * > RESET message is received, until a hard reset condition occurs, or until one
+ * > of the two SCSI devices elects to modify the agreement. The default data
+ * > transfer mode is asynchronous data transfer mode. The default data transfer
+ * > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard
+ * > reset condition.
+ *
+ * In total, this means that once you have elected to use synchronous
+ * transfers, you must always use DMA.
+ *
+ * I was thinking that this was a good chip until I found this restriction ;(
+ */
+#define SCSI2_SYNC
+#undef SCSI2_TAG
+
+#undef DEBUG_CONNECT
+#undef DEBUG_MESSAGES
+
+#undef CHECK_STRUCTURE
+
+#define LOG_CONNECT (1 << 0)
+#define LOG_BUSSERVICE (1 << 1)
+#define LOG_FUNCTIONDONE (1 << 2)
+#define LOG_MESSAGES (1 << 3)
+#define LOG_BUFFER (1 << 4)
+#define LOG_ERROR (1 << 8)
+
+static int level_mask = LOG_ERROR;
+
+module_param(level_mask, int, 0644);
+
+static int __init fas216_log_setup(char *str)
+{
+ char *s;
+
+ level_mask = 0;
+
+ while ((s = strsep(&str, ",")) != NULL) {
+ switch (s[0]) {
+ case 'a':
+ if (strcmp(s, "all") == 0)
+ level_mask |= -1;
+ break;
+ case 'b':
+ if (strncmp(s, "bus", 3) == 0)
+ level_mask |= LOG_BUSSERVICE;
+ if (strncmp(s, "buf", 3) == 0)
+ level_mask |= LOG_BUFFER;
+ break;
+ case 'c':
+ level_mask |= LOG_CONNECT;
+ break;
+ case 'e':
+ level_mask |= LOG_ERROR;
+ break;
+ case 'm':
+ level_mask |= LOG_MESSAGES;
+ break;
+ case 'n':
+ if (strcmp(s, "none") == 0)
+ level_mask = 0;
+ break;
+ case 's':
+ level_mask |= LOG_FUNCTIONDONE;
+ break;
+ }
+ }
+ return 1;
+}
+
+__setup("fas216_logging=", fas216_log_setup);
+
+static inline unsigned char fas216_readb(FAS216_Info *info, unsigned int reg)
+{
+ unsigned int off = reg << info->scsi.io_shift;
+ return readb(info->scsi.io_base + off);
+}
+
+static inline void fas216_writeb(FAS216_Info *info, unsigned int reg, unsigned int val)
+{
+ unsigned int off = reg << info->scsi.io_shift;
+ writeb(val, info->scsi.io_base + off);
+}
+
+static void fas216_dumpstate(FAS216_Info *info)
+{
+ unsigned char is, stat, inst;
+
+ is = fas216_readb(info, REG_IS);
+ stat = fas216_readb(info, REG_STAT);
+ inst = fas216_readb(info, REG_INST);
+
+ printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X"
+ " INST=%02X IS=%02X CFIS=%02X",
+ fas216_readb(info, REG_CTCL),
+ fas216_readb(info, REG_CTCM),
+ fas216_readb(info, REG_CMD), stat, inst, is,
+ fas216_readb(info, REG_CFIS));
+ printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02X\n",
+ fas216_readb(info, REG_CNTL1),
+ fas216_readb(info, REG_CNTL2),
+ fas216_readb(info, REG_CNTL3),
+ fas216_readb(info, REG_CTCH));
+}
+
+static void print_SCp(struct scsi_pointer *SCp, const char *prefix, const char *suffix)
+{
+ printk("%sptr %p this_residual 0x%x buffer %p buffers_residual 0x%x%s",
+ prefix, SCp->ptr, SCp->this_residual, SCp->buffer,
+ SCp->buffers_residual, suffix);
+}
+
+#ifdef CHECK_STRUCTURE
+static void fas216_dumpinfo(FAS216_Info *info)
+{
+ static int used = 0;
+ int i;
+
+ if (used++)
+ return;
+
+ printk("FAS216_Info=\n");
+ printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%p\n",
+ info->magic_start, info->host, info->SCpnt,
+ info->origSCpnt);
+ printk(" scsi={ io_shift=%X irq=%X cfg={ %X %X %X %X }\n",
+ info->scsi.io_shift, info->scsi.irq,
+ info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2],
+ info->scsi.cfg[3]);
+ printk(" type=%p phase=%X\n",
+ info->scsi.type, info->scsi.phase);
+ print_SCp(&info->scsi.SCp, " SCp={ ", " }\n");
+ printk(" msgs async_stp=%X disconnectable=%d aborting=%d }\n",
+ info->scsi.async_stp,
+ info->scsi.disconnectable, info->scsi.aborting);
+ printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%X\n"
+ " disconnects=%X aborts=%X bus_resets=%X host_resets=%X}\n",
+ info->stats.queues, info->stats.removes, info->stats.fins,
+ info->stats.reads, info->stats.writes, info->stats.miscs,
+ info->stats.disconnects, info->stats.aborts, info->stats.bus_resets,
+ info->stats.host_resets);
+ printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }\n",
+ info->ifcfg.clockrate, info->ifcfg.select_timeout,
+ info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth);
+ for (i = 0; i < 8; i++) {
+ printk(" busyluns[%d]=%08lx dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }\n",
+ i, info->busyluns[i], i,
+ info->device[i].disconnect_ok, info->device[i].stp,
+ info->device[i].sof, info->device[i].sync_state);
+ }
+ printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }\n",
+ info->dma.transfer_type, info->dma.setup,
+ info->dma.pseudo, info->dma.stop);
+ printk(" internal_done=%X magic_end=%lX }\n",
+ info->internal_done, info->magic_end);
+}
+
+static void __fas216_checkmagic(FAS216_Info *info, const char *func)
+{
+ int corruption = 0;
+ if (info->magic_start != MAGIC) {
+ printk(KERN_CRIT "FAS216 Error: magic at start corrupted\n");
+ corruption++;
+ }
+ if (info->magic_end != MAGIC) {
+ printk(KERN_CRIT "FAS216 Error: magic at end corrupted\n");
+ corruption++;
+ }
+ if (corruption) {
+ fas216_dumpinfo(info);
+ panic("scsi memory space corrupted in %s", func);
+ }
+}
+#define fas216_checkmagic(info) __fas216_checkmagic((info), __func__)
+#else
+#define fas216_checkmagic(info)
+#endif
+
+static const char *fas216_bus_phase(int stat)
+{
+ static const char *phases[] = {
+ "DATA OUT", "DATA IN",
+ "COMMAND", "STATUS",
+ "MISC OUT", "MISC IN",
+ "MESG OUT", "MESG IN"
+ };
+
+ return phases[stat & STAT_BUSMASK];
+}
+
+static const char *fas216_drv_phase(FAS216_Info *info)
+{
+ static const char *phases[] = {
+ [PHASE_IDLE] = "idle",
+ [PHASE_SELECTION] = "selection",
+ [PHASE_COMMAND] = "command",
+ [PHASE_DATAOUT] = "data out",
+ [PHASE_DATAIN] = "data in",
+ [PHASE_MSGIN] = "message in",
+ [PHASE_MSGIN_DISCONNECT]= "disconnect",
+ [PHASE_MSGOUT_EXPECT] = "expect message out",
+ [PHASE_MSGOUT] = "message out",
+ [PHASE_STATUS] = "status",
+ [PHASE_DONE] = "done",
+ };
+
+ if (info->scsi.phase < ARRAY_SIZE(phases) &&
+ phases[info->scsi.phase])
+ return phases[info->scsi.phase];
+ return "???";
+}
+
+static char fas216_target(FAS216_Info *info)
+{
+ if (info->SCpnt)
+ return '0' + info->SCpnt->device->id;
+ else
+ return 'H';
+}
+
+static void
+fas216_do_log(FAS216_Info *info, char target, char *fmt, va_list ap)
+{
+ static char buf[1024];
+
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ printk("scsi%d.%c: %s", info->host->host_no, target, buf);
+}
+
+static void fas216_log_command(FAS216_Info *info, int level,
+ struct scsi_cmnd *SCpnt, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ va_start(args, fmt);
+ fas216_do_log(info, '0' + SCpnt->device->id, fmt, args);
+ va_end(args);
+
+ scsi_print_command(SCpnt);
+}
+
+static void
+fas216_log_target(FAS216_Info *info, int level, int target, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ if (target < 0)
+ target = 'H';
+ else
+ target += '0';
+
+ va_start(args, fmt);
+ fas216_do_log(info, target, fmt, args);
+ va_end(args);
+
+ printk("\n");
+}
+
+static void fas216_log(FAS216_Info *info, int level, char *fmt, ...)
+{
+ va_list args;
+
+ if (level != 0 && !(level & level_mask))
+ return;
+
+ va_start(args, fmt);
+ fas216_do_log(info, fas216_target(info), fmt, args);
+ va_end(args);
+
+ printk("\n");
+}
+
+#define PH_SIZE 32
+
+static struct { int stat, ssr, isr, ph; } ph_list[PH_SIZE];
+static int ph_ptr;
+
+static void add_debug_list(int stat, int ssr, int isr, int ph)
+{
+ ph_list[ph_ptr].stat = stat;
+ ph_list[ph_ptr].ssr = ssr;
+ ph_list[ph_ptr].isr = isr;
+ ph_list[ph_ptr].ph = ph;
+
+ ph_ptr = (ph_ptr + 1) & (PH_SIZE-1);
+}
+
+static struct { int command; void *from; } cmd_list[8];
+static int cmd_ptr;
+
+static void fas216_cmd(FAS216_Info *info, unsigned int command)
+{
+ cmd_list[cmd_ptr].command = command;
+ cmd_list[cmd_ptr].from = __builtin_return_address(0);
+
+ cmd_ptr = (cmd_ptr + 1) & 7;
+
+ fas216_writeb(info, REG_CMD, command);
+}
+
+static void print_debug_list(void)
+{
+ int i;
+
+ i = ph_ptr;
+
+ printk(KERN_ERR "SCSI IRQ trail\n");
+ do {
+ printk(" %02x:%02x:%02x:%1x",
+ ph_list[i].stat, ph_list[i].ssr,
+ ph_list[i].isr, ph_list[i].ph);
+ i = (i + 1) & (PH_SIZE - 1);
+ if (((i ^ ph_ptr) & 7) == 0)
+ printk("\n");
+ } while (i != ph_ptr);
+ if ((i ^ ph_ptr) & 7)
+ printk("\n");
+
+ i = cmd_ptr;
+ printk(KERN_ERR "FAS216 commands: ");
+ do {
+ printk("%02x:%p ", cmd_list[i].command, cmd_list[i].from);
+ i = (i + 1) & 7;
+ } while (i != cmd_ptr);
+ printk("\n");
+}
+
+static void fas216_done(FAS216_Info *info, unsigned int result);
+
+/**
+ * fas216_get_last_msg - retrive last message from the list
+ * @info: interface to search
+ * @pos: current fifo position
+ *
+ * Retrieve a last message from the list, using position in fifo.
+ */
+static inline unsigned short
+fas216_get_last_msg(FAS216_Info *info, int pos)
+{
+ unsigned short packed_msg = NOP;
+ struct message *msg;
+ int msgnr = 0;
+
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ if (pos >= msg->fifo)
+ break;
+ }
+
+ if (msg) {
+ if (msg->msg[0] == EXTENDED_MESSAGE)
+ packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8;
+ else
+ packed_msg = msg->msg[0];
+ }
+
+ fas216_log(info, LOG_MESSAGES,
+ "Message: %04x found at position %02x\n", packed_msg, pos);
+
+ return packed_msg;
+}
+
+/**
+ * fas216_syncperiod - calculate STP register value
+ * @info: state structure for interface connected to device
+ * @ns: period in ns (between subsequent bytes)
+ *
+ * Calculate value to be loaded into the STP register for a given period
+ * in ns. Returns a value suitable for REG_STP.
+ */
+static int fas216_syncperiod(FAS216_Info *info, int ns)
+{
+ int value = (info->ifcfg.clockrate * ns) / 1000;
+
+ fas216_checkmagic(info);
+
+ if (value < 4)
+ value = 4;
+ else if (value > 35)
+ value = 35;
+
+ return value & 31;
+}
+
+/**
+ * fas216_set_sync - setup FAS216 chip for specified transfer period.
+ * @info: state structure for interface connected to device
+ * @target: target
+ *
+ * Correctly setup FAS216 chip for specified transfer period.
+ * Notes : we need to switch the chip out of FASTSCSI mode if we have
+ * a transfer period >= 200ns - otherwise the chip will violate
+ * the SCSI timings.
+ */
+static void fas216_set_sync(FAS216_Info *info, int target)
+{
+ unsigned int cntl3;
+
+ fas216_writeb(info, REG_SOF, info->device[target].sof);
+ fas216_writeb(info, REG_STP, info->device[target].stp);
+
+ cntl3 = info->scsi.cfg[2];
+ if (info->device[target].period >= (200 / 4))
+ cntl3 = cntl3 & ~CNTL3_FASTSCSI;
+
+ fas216_writeb(info, REG_CNTL3, cntl3);
+}
+
+/* Synchronous transfer support
+ *
+ * Note: The SCSI II r10 spec says (5.6.12):
+ *
+ * (2) Due to historical problems with early host adapters that could
+ * not accept an SDTR message, some targets may not initiate synchronous
+ * negotiation after a power cycle as required by this standard. Host
+ * adapters that support synchronous mode may avoid the ensuing failure
+ * modes when the target is independently power cycled by initiating a
+ * synchronous negotiation on each REQUEST SENSE and INQUIRY command.
+ * This approach increases the SCSI bus overhead and is not recommended
+ * for new implementations. The correct method is to respond to an
+ * SDTR message with a MESSAGE REJECT message if the either the
+ * initiator or target devices does not support synchronous transfers
+ * or does not want to negotiate for synchronous transfers at the time.
+ * Using the correct method assures compatibility with wide data
+ * transfers and future enhancements.
+ *
+ * We will always initiate a synchronous transfer negotiation request on
+ * every INQUIRY or REQUEST SENSE message, unless the target itself has
+ * at some point performed a synchronous transfer negotiation request, or
+ * we have synchronous transfers disabled for this device.
+ */
+
+/**
+ * fas216_handlesync - Handle a synchronous transfer message
+ * @info: state structure for interface
+ * @msg: message from target
+ *
+ * Handle a synchronous transfer message from the target
+ */
+static void fas216_handlesync(FAS216_Info *info, char *msg)
+{
+ struct fas216_device *dev = &info->device[info->SCpnt->device->id];
+ enum { sync, async, none, reject } res = none;
+
+#ifdef SCSI2_SYNC
+ switch (msg[0]) {
+ case MESSAGE_REJECT:
+ /* Synchronous transfer request failed.
+ * Note: SCSI II r10:
+ *
+ * SCSI devices that are capable of synchronous
+ * data transfers shall not respond to an SDTR
+ * message with a MESSAGE REJECT message.
+ *
+ * Hence, if we get this condition, we disable
+ * negotiation for this device.
+ */
+ if (dev->sync_state == neg_inprogress) {
+ dev->sync_state = neg_invalid;
+ res = async;
+ }
+ break;
+
+ case EXTENDED_MESSAGE:
+ switch (dev->sync_state) {
+ /* We don't accept synchronous transfer requests.
+ * Respond with a MESSAGE_REJECT to prevent a
+ * synchronous transfer agreement from being reached.
+ */
+ case neg_invalid:
+ res = reject;
+ break;
+
+ /* We were not negotiating a synchronous transfer,
+ * but the device sent us a negotiation request.
+ * Honour the request by sending back a SDTR
+ * message containing our capability, limited by
+ * the targets capability.
+ */
+ default:
+ fas216_cmd(info, CMD_SETATN);
+ if (msg[4] > info->ifcfg.sync_max_depth)
+ msg[4] = info->ifcfg.sync_max_depth;
+ if (msg[3] < 1000 / info->ifcfg.clockrate)
+ msg[3] = 1000 / info->ifcfg.clockrate;
+
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 5,
+ EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
+ msg[3], msg[4]);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+
+ /* This is wrong. The agreement is not in effect
+ * until this message is accepted by the device
+ */
+ dev->sync_state = neg_targcomplete;
+ res = sync;
+ break;
+
+ /* We initiated the synchronous transfer negotiation,
+ * and have successfully received a response from the
+ * target. The synchronous transfer agreement has been
+ * reached. Note: if the values returned are out of our
+ * bounds, we must reject the message.
+ */
+ case neg_inprogress:
+ res = reject;
+ if (msg[4] <= info->ifcfg.sync_max_depth &&
+ msg[3] >= 1000 / info->ifcfg.clockrate) {
+ dev->sync_state = neg_complete;
+ res = sync;
+ }
+ break;
+ }
+ }
+#else
+ res = reject;
+#endif
+
+ switch (res) {
+ case sync:
+ dev->period = msg[3];
+ dev->sof = msg[4];
+ dev->stp = fas216_syncperiod(info, msg[3] * 4);
+ fas216_set_sync(info, info->SCpnt->device->id);
+ break;
+
+ case reject:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+
+ case async:
+ dev->period = info->ifcfg.asyncperiod / 4;
+ dev->sof = 0;
+ dev->stp = info->scsi.async_stp;
+ fas216_set_sync(info, info->SCpnt->device->id);
+ break;
+
+ case none:
+ break;
+ }
+}
+
+/**
+ * fas216_updateptrs - update data pointers after transfer suspended/paused
+ * @info: interface's local pointer to update
+ * @bytes_transferred: number of bytes transferred
+ *
+ * Update data pointers after transfer suspended/paused
+ */
+static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred)
+{
+ struct scsi_pointer *SCp = &info->scsi.SCp;
+
+ fas216_checkmagic(info);
+
+ BUG_ON(bytes_transferred < 0);
+
+ SCp->phase -= bytes_transferred;
+
+ while (bytes_transferred != 0) {
+ if (SCp->this_residual > bytes_transferred)
+ break;
+ /*
+ * We have used up this buffer. Move on to the
+ * next buffer.
+ */
+ bytes_transferred -= SCp->this_residual;
+ if (!next_SCp(SCp) && bytes_transferred) {
+ printk(KERN_WARNING "scsi%d.%c: out of buffers\n",
+ info->host->host_no, '0' + info->SCpnt->device->id);
+ return;
+ }
+ }
+
+ SCp->this_residual -= bytes_transferred;
+ if (SCp->this_residual)
+ SCp->ptr += bytes_transferred;
+ else
+ SCp->ptr = NULL;
+}
+
+/**
+ * fas216_pio - transfer data off of/on to card using programmed IO
+ * @info: interface to transfer data to/from
+ * @direction: direction to transfer data (DMA_OUT/DMA_IN)
+ *
+ * Transfer data off of/on to card using programmed IO.
+ * Notes: this is incredibly slow.
+ */
+static void fas216_pio(FAS216_Info *info, fasdmadir_t direction)
+{
+ struct scsi_pointer *SCp = &info->scsi.SCp;
+
+ fas216_checkmagic(info);
+
+ if (direction == DMA_OUT)
+ fas216_writeb(info, REG_FF, get_next_SCp_byte(SCp));
+ else
+ put_next_SCp_byte(SCp, fas216_readb(info, REG_FF));
+
+ if (SCp->this_residual == 0)
+ next_SCp(SCp);
+}
+
+static void fas216_set_stc(FAS216_Info *info, unsigned int length)
+{
+ fas216_writeb(info, REG_STCL, length);
+ fas216_writeb(info, REG_STCM, length >> 8);
+ fas216_writeb(info, REG_STCH, length >> 16);
+}
+
+static unsigned int fas216_get_ctc(FAS216_Info *info)
+{
+ return fas216_readb(info, REG_CTCL) +
+ (fas216_readb(info, REG_CTCM) << 8) +
+ (fas216_readb(info, REG_CTCH) << 16);
+}
+
+/**
+ * fas216_cleanuptransfer - clean up after a transfer has completed.
+ * @info: interface to clean up
+ *
+ * Update the data pointers according to the number of bytes transferred
+ * on the SCSI bus.
+ */
+static void fas216_cleanuptransfer(FAS216_Info *info)
+{
+ unsigned long total, residual, fifo;
+ fasdmatype_t dmatype = info->dma.transfer_type;
+
+ info->dma.transfer_type = fasdma_none;
+
+ /*
+ * PIO transfers do not need to be cleaned up.
+ */
+ if (dmatype == fasdma_pio || dmatype == fasdma_none)
+ return;
+
+ if (dmatype == fasdma_real_all)
+ total = info->scsi.SCp.phase;
+ else
+ total = info->scsi.SCp.this_residual;
+
+ residual = fas216_get_ctc(info);
+
+ fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+
+ fas216_log(info, LOG_BUFFER, "cleaning up from previous "
+ "transfer: length 0x%06x, residual 0x%x, fifo %d",
+ total, residual, fifo);
+
+ /*
+ * If we were performing Data-Out, the transfer counter
+ * counts down each time a byte is transferred by the
+ * host to the FIFO. This means we must include the
+ * bytes left in the FIFO from the transfer counter.
+ */
+ if (info->scsi.phase == PHASE_DATAOUT)
+ residual += fifo;
+
+ fas216_updateptrs(info, total - residual);
+}
+
+/**
+ * fas216_transfer - Perform a DMA/PIO transfer off of/on to card
+ * @info: interface from which device disconnected from
+ *
+ * Start a DMA/PIO transfer off of/on to card
+ */
+static void fas216_transfer(FAS216_Info *info)
+{
+ fasdmadir_t direction;
+ fasdmatype_t dmatype;
+
+ fas216_log(info, LOG_BUFFER,
+ "starttransfer: buffer %p length 0x%06x reqlen 0x%06x",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual,
+ info->scsi.SCp.phase);
+
+ if (!info->scsi.SCp.ptr) {
+ fas216_log(info, LOG_ERROR, "null buffer passed to "
+ "fas216_starttransfer");
+ print_SCp(&info->scsi.SCp, "SCp: ", "\n");
+ print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n");
+ return;
+ }
+
+ /*
+ * If we have a synchronous transfer agreement in effect, we must
+ * use DMA mode. If we are using asynchronous transfers, we may
+ * use DMA mode or PIO mode.
+ */
+ if (info->device[info->SCpnt->device->id].sof)
+ dmatype = fasdma_real_all;
+ else
+ dmatype = fasdma_pio;
+
+ if (info->scsi.phase == PHASE_DATAOUT)
+ direction = DMA_OUT;
+ else
+ direction = DMA_IN;
+
+ if (info->dma.setup)
+ dmatype = info->dma.setup(info->host, &info->scsi.SCp,
+ direction, dmatype);
+ info->dma.transfer_type = dmatype;
+
+ if (dmatype == fasdma_real_all)
+ fas216_set_stc(info, info->scsi.SCp.phase);
+ else
+ fas216_set_stc(info, info->scsi.SCp.this_residual);
+
+ switch (dmatype) {
+ case fasdma_pio:
+ fas216_log(info, LOG_BUFFER, "PIO transfer");
+ fas216_writeb(info, REG_SOF, 0);
+ fas216_writeb(info, REG_STP, info->scsi.async_stp);
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ fas216_pio(info, direction);
+ break;
+
+ case fasdma_pseudo:
+ fas216_log(info, LOG_BUFFER, "pseudo transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ info->dma.pseudo(info->host, &info->scsi.SCp,
+ direction, info->SCpnt->transfersize);
+ break;
+
+ case fasdma_real_block:
+ fas216_log(info, LOG_BUFFER, "block dma transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ break;
+
+ case fasdma_real_all:
+ fas216_log(info, LOG_BUFFER, "total dma transfer");
+ fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA);
+ break;
+
+ default:
+ fas216_log(info, LOG_BUFFER | LOG_ERROR,
+ "invalid FAS216 DMA type");
+ break;
+ }
+}
+
+/**
+ * fas216_stoptransfer - Stop a DMA transfer onto / off of the card
+ * @info: interface from which device disconnected from
+ *
+ * Called when we switch away from DATA IN or DATA OUT phases.
+ */
+static void fas216_stoptransfer(FAS216_Info *info)
+{
+ fas216_checkmagic(info);
+
+ if (info->dma.transfer_type == fasdma_real_all ||
+ info->dma.transfer_type == fasdma_real_block)
+ info->dma.stop(info->host, &info->scsi.SCp);
+
+ fas216_cleanuptransfer(info);
+
+ if (info->scsi.phase == PHASE_DATAIN) {
+ unsigned int fifo;
+
+ /*
+ * If we were performing Data-In, then the FIFO counter
+ * contains the number of bytes not transferred via DMA
+ * from the on-board FIFO. Read them manually.
+ */
+ fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ while (fifo && info->scsi.SCp.ptr) {
+ *info->scsi.SCp.ptr = fas216_readb(info, REG_FF);
+ fas216_updateptrs(info, 1);
+ fifo--;
+ }
+ } else {
+ /*
+ * After a Data-Out phase, there may be unsent
+ * bytes left in the FIFO. Flush them out.
+ */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ }
+}
+
+static void fas216_aborttransfer(FAS216_Info *info)
+{
+ fas216_checkmagic(info);
+
+ if (info->dma.transfer_type == fasdma_real_all ||
+ info->dma.transfer_type == fasdma_real_block)
+ info->dma.stop(info->host, &info->scsi.SCp);
+
+ info->dma.transfer_type = fasdma_none;
+ fas216_cmd(info, CMD_FLUSHFIFO);
+}
+
+static void fas216_kick(FAS216_Info *info);
+
+/**
+ * fas216_disconnected_intr - handle device disconnection
+ * @info: interface from which device disconnected from
+ *
+ * Handle device disconnection
+ */
+static void fas216_disconnect_intr(FAS216_Info *info)
+{
+ unsigned long flags;
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_CONNECT, "disconnect phase=%02x",
+ info->scsi.phase);
+
+ msgqueue_flush(&info->scsi.msgs);
+
+ switch (info->scsi.phase) {
+ case PHASE_SELECTION: /* while selecting - no target */
+ case PHASE_SELSTEPS:
+ fas216_done(info, DID_NO_CONNECT);
+ break;
+
+ case PHASE_MSGIN_DISCONNECT: /* message in - disconnecting */
+ info->scsi.disconnectable = 1;
+ info->scsi.phase = PHASE_IDLE;
+ info->stats.disconnects += 1;
+ spin_lock_irqsave(&info->host_lock, flags);
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+ break;
+
+ case PHASE_DONE: /* at end of command - complete */
+ fas216_done(info, DID_OK);
+ break;
+
+ case PHASE_MSGOUT: /* message out - possible ABORT message */
+ if (fas216_get_last_msg(info, info->scsi.msgin_fifo) == ABORT) {
+ info->scsi.aborting = 0;
+ fas216_done(info, DID_ABORT);
+ break;
+ }
+
+ default: /* huh? */
+ printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %s\n",
+ info->host->host_no, fas216_target(info), fas216_drv_phase(info));
+ print_debug_list();
+ fas216_stoptransfer(info);
+ fas216_done(info, DID_ERROR);
+ break;
+ }
+}
+
+/**
+ * fas216_reselected_intr - start reconnection of a device
+ * @info: interface which was reselected
+ *
+ * Start reconnection of a device
+ */
+static void
+fas216_reselected_intr(FAS216_Info *info)
+{
+ unsigned int cfis, i;
+ unsigned char msg[4];
+ unsigned char target, lun, tag;
+
+ fas216_checkmagic(info);
+
+ WARN_ON(info->scsi.phase == PHASE_SELECTION ||
+ info->scsi.phase == PHASE_SELSTEPS);
+
+ cfis = fas216_readb(info, REG_CFIS);
+
+ fas216_log(info, LOG_CONNECT, "reconnect phase=%02x cfis=%02x",
+ info->scsi.phase, cfis);
+
+ cfis &= CFIS_CF;
+
+ if (cfis < 2 || cfis > 4) {
+ printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselect\n",
+ info->host->host_no);
+ goto bad_message;
+ }
+
+ for (i = 0; i < cfis; i++)
+ msg[i] = fas216_readb(info, REG_FF);
+
+ if (!(msg[0] & (1 << info->host->this_id)) ||
+ !(msg[1] & 0x80))
+ goto initiator_error;
+
+ target = msg[0] & ~(1 << info->host->this_id);
+ target = ffs(target) - 1;
+ lun = msg[1] & 7;
+ tag = 0;
+
+ if (cfis >= 3) {
+ if (msg[2] != SIMPLE_QUEUE_TAG)
+ goto initiator_error;
+
+ tag = msg[3];
+ }
+
+ /* set up for synchronous transfers */
+ fas216_writeb(info, REG_SDID, target);
+ fas216_set_sync(info, target);
+ msgqueue_flush(&info->scsi.msgs);
+
+ fas216_log(info, LOG_CONNECT, "Reconnected: target %1x lun %1x tag %02x",
+ target, lun, tag);
+
+ if (info->scsi.disconnectable && info->SCpnt) {
+ info->scsi.disconnectable = 0;
+ if (info->SCpnt->device->id == target &&
+ info->SCpnt->device->lun == lun &&
+ info->SCpnt->tag == tag) {
+ fas216_log(info, LOG_CONNECT, "reconnected previously executing command");
+ } else {
+ queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
+ fas216_log(info, LOG_CONNECT, "had to move command to disconnected queue");
+ info->SCpnt = NULL;
+ }
+ }
+ if (!info->SCpnt) {
+ info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected,
+ target, lun, tag);
+ fas216_log(info, LOG_CONNECT, "had to get command");
+ }
+
+ if (info->SCpnt) {
+ /*
+ * Restore data pointer from SAVED data pointer
+ */
+ info->scsi.SCp = info->SCpnt->SCp;
+
+ fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ info->scsi.phase = PHASE_MSGIN;
+ } else {
+ /*
+ * Our command structure not found - abort the
+ * command on the target. Since we have no
+ * record of this command, we can't send
+ * an INITIATOR DETECTED ERROR message.
+ */
+ fas216_cmd(info, CMD_SETATN);
+
+#if 0
+ if (tag)
+ msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, tag);
+ else
+#endif
+ msgqueue_addmsg(&info->scsi.msgs, 1, ABORT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ info->scsi.aborting = 1;
+ }
+
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+
+ initiator_error:
+ printk(KERN_ERR "scsi%d.H: error during reselection: bytes",
+ info->host->host_no);
+ for (i = 0; i < cfis; i++)
+ printk(" %02x", msg[i]);
+ printk("\n");
+ bad_message:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+}
+
+static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen)
+{
+ int i;
+
+ switch (message[0]) {
+ case COMMAND_COMPLETE:
+ if (msglen != 1)
+ goto unrecognised;
+
+ printk(KERN_ERR "scsi%d.%c: command complete with no "
+ "status in MESSAGE_IN?\n",
+ info->host->host_no, fas216_target(info));
+ break;
+
+ case SAVE_POINTERS:
+ if (msglen != 1)
+ goto unrecognised;
+
+ /*
+ * Save current data pointer to SAVED data pointer
+ * SCSI II standard says that we must not acknowledge
+ * this until we have really saved pointers.
+ * NOTE: we DO NOT save the command nor status pointers
+ * as required by the SCSI II standard. These always
+ * point to the start of their respective areas.
+ */
+ info->SCpnt->SCp = info->scsi.SCp;
+ info->SCpnt->SCp.sent_command = 0;
+ fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
+ "save data pointers: [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ break;
+
+ case RESTORE_POINTERS:
+ if (msglen != 1)
+ goto unrecognised;
+
+ /*
+ * Restore current data pointer from SAVED data pointer
+ */
+ info->scsi.SCp = info->SCpnt->SCp;
+ fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER,
+ "restore data pointers: [%p, 0x%x]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ break;
+
+ case DISCONNECT:
+ if (msglen != 1)
+ goto unrecognised;
+
+ info->scsi.phase = PHASE_MSGIN_DISCONNECT;
+ break;
+
+ case MESSAGE_REJECT:
+ if (msglen != 1)
+ goto unrecognised;
+
+ switch (fas216_get_last_msg(info, info->scsi.msgin_fifo)) {
+ case EXTENDED_MESSAGE | EXTENDED_SDTR << 8:
+ fas216_handlesync(info, message);
+ break;
+
+ default:
+ fas216_log(info, 0, "reject, last message 0x%04x",
+ fas216_get_last_msg(info, info->scsi.msgin_fifo));
+ }
+ break;
+
+ case NOP:
+ break;
+
+ case EXTENDED_MESSAGE:
+ if (msglen < 3)
+ goto unrecognised;
+
+ switch (message[2]) {
+ case EXTENDED_SDTR: /* Sync transfer negotiation request/reply */
+ fas216_handlesync(info, message);
+ break;
+
+ default:
+ goto unrecognised;
+ }
+ break;
+
+ default:
+ goto unrecognised;
+ }
+ return;
+
+unrecognised:
+ fas216_log(info, 0, "unrecognised message, rejecting");
+ printk("scsi%d.%c: message was", info->host->host_no, fas216_target(info));
+ for (i = 0; i < msglen; i++)
+ printk("%s%02X", i & 31 ? " " : "\n ", message[i]);
+ printk("\n");
+
+ /*
+ * Something strange seems to be happening here -
+ * I can't use SETATN since the chip gives me an
+ * invalid command interrupt when I do. Weird.
+ */
+fas216_cmd(info, CMD_NOP);
+fas216_dumpstate(info);
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+fas216_dumpstate(info);
+}
+
+static int fas216_wait_cmd(FAS216_Info *info, int cmd)
+{
+ int tout;
+ int stat;
+
+ fas216_cmd(info, cmd);
+
+ for (tout = 1000; tout; tout -= 1) {
+ stat = fas216_readb(info, REG_STAT);
+ if (stat & (STAT_INT|STAT_PARITYERROR))
+ break;
+ udelay(1);
+ }
+
+ return stat;
+}
+
+static int fas216_get_msg_byte(FAS216_Info *info)
+{
+ unsigned int stat = fas216_wait_cmd(info, CMD_MSGACCEPTED);
+
+ if ((stat & STAT_INT) == 0)
+ goto timedout;
+
+ if ((stat & STAT_BUSMASK) != STAT_MESGIN)
+ goto unexpected_phase_change;
+
+ fas216_readb(info, REG_INST);
+
+ stat = fas216_wait_cmd(info, CMD_TRANSFERINFO);
+
+ if ((stat & STAT_INT) == 0)
+ goto timedout;
+
+ if (stat & STAT_PARITYERROR)
+ goto parity_error;
+
+ if ((stat & STAT_BUSMASK) != STAT_MESGIN)
+ goto unexpected_phase_change;
+
+ fas216_readb(info, REG_INST);
+
+ return fas216_readb(info, REG_FF);
+
+timedout:
+ fas216_log(info, LOG_ERROR, "timed out waiting for message byte");
+ return -1;
+
+unexpected_phase_change:
+ fas216_log(info, LOG_ERROR, "unexpected phase change: status = %02x", stat);
+ return -2;
+
+parity_error:
+ fas216_log(info, LOG_ERROR, "parity error during message in phase");
+ return -3;
+}
+
+/**
+ * fas216_message - handle a function done interrupt from FAS216 chip
+ * @info: interface which caused function done interrupt
+ *
+ * Handle a function done interrupt from FAS216 chip
+ */
+static void fas216_message(FAS216_Info *info)
+{
+ unsigned char *message = info->scsi.message;
+ unsigned int msglen = 1;
+ int msgbyte = 0;
+
+ fas216_checkmagic(info);
+
+ message[0] = fas216_readb(info, REG_FF);
+
+ if (message[0] == EXTENDED_MESSAGE) {
+ msgbyte = fas216_get_msg_byte(info);
+
+ if (msgbyte >= 0) {
+ message[1] = msgbyte;
+
+ for (msglen = 2; msglen < message[1] + 2; msglen++) {
+ msgbyte = fas216_get_msg_byte(info);
+
+ if (msgbyte >= 0)
+ message[msglen] = msgbyte;
+ else
+ break;
+ }
+ }
+ }
+
+ if (msgbyte == -3)
+ goto parity_error;
+
+#ifdef DEBUG_MESSAGES
+ {
+ int i;
+
+ printk("scsi%d.%c: message in: ",
+ info->host->host_no, fas216_target(info));
+ for (i = 0; i < msglen; i++)
+ printk("%02X ", message[i]);
+ printk("\n");
+ }
+#endif
+
+ fas216_parse_message(info, message, msglen);
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+
+parity_error:
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, MSG_PARITY_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ return;
+}
+
+/**
+ * fas216_send_command - send command after all message bytes have been sent
+ * @info: interface which caused bus service
+ *
+ * Send a command to a target after all message bytes have been sent
+ */
+static void fas216_send_command(FAS216_Info *info)
+{
+ int i;
+
+ fas216_checkmagic(info);
+
+ fas216_cmd(info, CMD_NOP|CMD_WITHDMA);
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load command */
+ for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++)
+ fas216_writeb(info, REG_FF, info->SCpnt->cmnd[i]);
+
+ fas216_cmd(info, CMD_TRANSFERINFO);
+
+ info->scsi.phase = PHASE_COMMAND;
+}
+
+/**
+ * fas216_send_messageout - handle bus service to send a message
+ * @info: interface which caused bus service
+ *
+ * Handle bus service to send a message.
+ * Note: We do not allow the device to change the data direction!
+ */
+static void fas216_send_messageout(FAS216_Info *info, int start)
+{
+ unsigned int tot_msglen = msgqueue_msglength(&info->scsi.msgs);
+
+ fas216_checkmagic(info);
+
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ if (tot_msglen) {
+ struct message *msg;
+ int msgnr = 0;
+
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ int i;
+
+ for (i = start; i < msg->length; i++)
+ fas216_writeb(info, REG_FF, msg->msg[i]);
+
+ msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
+ start = 0;
+ }
+ } else
+ fas216_writeb(info, REG_FF, NOP);
+
+ fas216_cmd(info, CMD_TRANSFERINFO);
+
+ info->scsi.phase = PHASE_MSGOUT;
+}
+
+/**
+ * fas216_busservice_intr - handle bus service interrupt from FAS216 chip
+ * @info: interface which caused bus service interrupt
+ * @stat: Status register contents
+ * @is: SCSI Status register contents
+ *
+ * Handle a bus service interrupt from FAS216 chip
+ */
+static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
+{
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_BUSSERVICE,
+ "bus service: stat=%02x is=%02x phase=%02x",
+ stat, is, info->scsi.phase);
+
+ switch (info->scsi.phase) {
+ case PHASE_SELECTION:
+ if ((is & IS_BITS) != IS_MSGBYTESENT)
+ goto bad_is;
+ break;
+
+ case PHASE_SELSTEPS:
+ switch (is & IS_BITS) {
+ case IS_SELARB:
+ case IS_MSGBYTESENT:
+ goto bad_is;
+
+ case IS_NOTCOMMAND:
+ case IS_EARLYPHASE:
+ if ((stat & STAT_BUSMASK) == STAT_MESGIN)
+ break;
+ goto bad_is;
+
+ case IS_COMPLETE:
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ fas216_cmd(info, CMD_NOP);
+
+#define STATE(st,ph) ((ph) << 3 | (st))
+ /* This table describes the legal SCSI state transitions,
+ * as described by the SCSI II spec.
+ */
+ switch (STATE(stat & STAT_BUSMASK, info->scsi.phase)) {
+ case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> Data In */
+ case STATE(STAT_DATAIN, PHASE_MSGOUT): /* Message Out -> Data In */
+ case STATE(STAT_DATAIN, PHASE_COMMAND): /* Command -> Data In */
+ case STATE(STAT_DATAIN, PHASE_MSGIN): /* Message In -> Data In */
+ info->scsi.phase = PHASE_DATAIN;
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */
+ case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */
+ fas216_cleanuptransfer(info);
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_DATAOUT, PHASE_SELSTEPS):/* Sel w/ steps-> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_MSGOUT): /* Message Out -> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_COMMAND):/* Command -> Data Out */
+ case STATE(STAT_DATAOUT, PHASE_MSGIN): /* Message In -> Data Out */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ info->scsi.phase = PHASE_DATAOUT;
+ fas216_transfer(info);
+ return;
+
+ case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out -> Status */
+ case STATE(STAT_STATUS, PHASE_DATAIN): /* Data In -> Status */
+ fas216_stoptransfer(info);
+ case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status */
+ case STATE(STAT_STATUS, PHASE_MSGOUT): /* Message Out -> Status */
+ case STATE(STAT_STATUS, PHASE_COMMAND): /* Command -> Status */
+ case STATE(STAT_STATUS, PHASE_MSGIN): /* Message In -> Status */
+ fas216_cmd(info, CMD_INITCMDCOMPLETE);
+ info->scsi.phase = PHASE_STATUS;
+ return;
+
+ case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out -> Message In */
+ case STATE(STAT_MESGIN, PHASE_DATAIN): /* Data In -> Message In */
+ fas216_stoptransfer(info);
+ case STATE(STAT_MESGIN, PHASE_COMMAND): /* Command -> Message In */
+ case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In */
+ case STATE(STAT_MESGIN, PHASE_MSGOUT): /* Message Out -> Message In */
+ info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ fas216_cmd(info, CMD_FLUSHFIFO);
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ info->scsi.phase = PHASE_MSGIN;
+ return;
+
+ case STATE(STAT_MESGIN, PHASE_MSGIN):
+ info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF;
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ return;
+
+ case STATE(STAT_COMMAND, PHASE_MSGOUT): /* Message Out -> Command */
+ case STATE(STAT_COMMAND, PHASE_MSGIN): /* Message In -> Command */
+ fas216_send_command(info);
+ info->scsi.phase = PHASE_COMMAND;
+ return;
+
+
+ /*
+ * Selection -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_SELECTION):
+ fas216_send_messageout(info, 1);
+ return;
+
+ /*
+ * Message Out -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_SELSTEPS):
+ case STATE(STAT_MESGOUT, PHASE_MSGOUT):
+ /*
+ * If we get another message out phase, this usually
+ * means some parity error occurred. Resend complete
+ * set of messages. If we have more than one byte to
+ * send, we need to assert ATN again.
+ */
+ if (info->device[info->SCpnt->device->id].parity_check) {
+ /*
+ * We were testing... good, the device
+ * supports parity checking.
+ */
+ info->device[info->SCpnt->device->id].parity_check = 0;
+ info->device[info->SCpnt->device->id].parity_enabled = 1;
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ }
+
+ if (msgqueue_msglength(&info->scsi.msgs) > 1)
+ fas216_cmd(info, CMD_SETATN);
+ /*FALLTHROUGH*/
+
+ /*
+ * Any -> Message Out
+ */
+ case STATE(STAT_MESGOUT, PHASE_MSGOUT_EXPECT):
+ fas216_send_messageout(info, 0);
+ return;
+
+ /* Error recovery rules.
+ * These either attempt to abort or retry the operation.
+ * TODO: we need more of these
+ */
+ case STATE(STAT_COMMAND, PHASE_COMMAND):/* Command -> Command */
+ /* error - we've sent out all the command bytes
+ * we have.
+ * NOTE: we need SAVE DATA POINTERS/RESTORE DATA POINTERS
+ * to include the command bytes sent for this to work
+ * correctly.
+ */
+ printk(KERN_ERR "scsi%d.%c: "
+ "target trying to receive more command bytes\n",
+ info->host->host_no, fas216_target(info));
+ fas216_cmd(info, CMD_SETATN);
+ fas216_set_stc(info, 15);
+ fas216_cmd(info, CMD_PADBYTES | CMD_WITHDMA);
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ return;
+ }
+
+ if (info->scsi.phase == PHASE_MSGIN_DISCONNECT) {
+ printk(KERN_ERR "scsi%d.%c: disconnect message received, but bus service %s?\n",
+ info->host->host_no, fas216_target(info),
+ fas216_bus_phase(stat));
+ msgqueue_flush(&info->scsi.msgs);
+ fas216_cmd(info, CMD_SETATN);
+ msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR);
+ info->scsi.phase = PHASE_MSGOUT_EXPECT;
+ info->scsi.aborting = 1;
+ fas216_cmd(info, CMD_TRANSFERINFO);
+ return;
+ }
+ printk(KERN_ERR "scsi%d.%c: bus phase %s after %s?\n",
+ info->host->host_no, fas216_target(info),
+ fas216_bus_phase(stat),
+ fas216_drv_phase(info));
+ print_debug_list();
+ return;
+
+bad_is:
+ fas216_log(info, 0, "bus service at step %d?", is & IS_BITS);
+ fas216_dumpstate(info);
+ print_debug_list();
+
+ fas216_done(info, DID_ERROR);
+}
+
+/**
+ * fas216_funcdone_intr - handle a function done interrupt from FAS216 chip
+ * @info: interface which caused function done interrupt
+ * @stat: Status register contents
+ * @is: SCSI Status register contents
+ *
+ * Handle a function done interrupt from FAS216 chip
+ */
+static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int is)
+{
+ unsigned int fifo_len = fas216_readb(info, REG_CFIS) & CFIS_CF;
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_FUNCTIONDONE,
+ "function done: stat=%02x is=%02x phase=%02x",
+ stat, is, info->scsi.phase);
+
+ switch (info->scsi.phase) {
+ case PHASE_STATUS: /* status phase - read status and msg */
+ if (fifo_len != 2) {
+ fas216_log(info, 0, "odd number of bytes in FIFO: %d", fifo_len);
+ }
+ /*
+ * Read status then message byte.
+ */
+ info->scsi.SCp.Status = fas216_readb(info, REG_FF);
+ info->scsi.SCp.Message = fas216_readb(info, REG_FF);
+ info->scsi.phase = PHASE_DONE;
+ fas216_cmd(info, CMD_MSGACCEPTED);
+ break;
+
+ case PHASE_IDLE:
+ case PHASE_SELECTION:
+ case PHASE_SELSTEPS:
+ break;
+
+ case PHASE_MSGIN: /* message in phase */
+ if ((stat & STAT_BUSMASK) == STAT_MESGIN) {
+ info->scsi.msgin_fifo = fifo_len;
+ fas216_message(info);
+ break;
+ }
+
+ default:
+ fas216_log(info, 0, "internal phase %s for function done?"
+ " What do I do with this?",
+ fas216_target(info), fas216_drv_phase(info));
+ }
+}
+
+static void fas216_bus_reset(FAS216_Info *info)
+{
+ neg_t sync_state;
+ int i;
+
+ msgqueue_flush(&info->scsi.msgs);
+
+ sync_state = neg_invalid;
+
+#ifdef SCSI2_SYNC
+ if (info->ifcfg.capabilities & (FASCAP_DMA|FASCAP_PSEUDODMA))
+ sync_state = neg_wait;
+#endif
+
+ info->scsi.phase = PHASE_IDLE;
+ info->SCpnt = NULL; /* bug! */
+ memset(&info->scsi.SCp, 0, sizeof(info->scsi.SCp));
+
+ for (i = 0; i < 8; i++) {
+ info->device[i].disconnect_ok = info->ifcfg.disconnect_ok;
+ info->device[i].sync_state = sync_state;
+ info->device[i].period = info->ifcfg.asyncperiod / 4;
+ info->device[i].stp = info->scsi.async_stp;
+ info->device[i].sof = 0;
+ info->device[i].wide_xfer = 0;
+ }
+
+ info->rst_bus_status = 1;
+ wake_up(&info->eh_wait);
+}
+
+/**
+ * fas216_intr - handle interrupts to progress a command
+ * @info: interface to service
+ *
+ * Handle interrupts from the interface to progress a command
+ */
+irqreturn_t fas216_intr(FAS216_Info *info)
+{
+ unsigned char inst, is, stat;
+ int handled = IRQ_NONE;
+
+ fas216_checkmagic(info);
+
+ stat = fas216_readb(info, REG_STAT);
+ is = fas216_readb(info, REG_IS);
+ inst = fas216_readb(info, REG_INST);
+
+ add_debug_list(stat, is, inst, info->scsi.phase);
+
+ if (stat & STAT_INT) {
+ if (inst & INST_BUSRESET) {
+ fas216_log(info, 0, "bus reset detected");
+ fas216_bus_reset(info);
+ scsi_report_bus_reset(info->host, 0);
+ } else if (inst & INST_ILLEGALCMD) {
+ fas216_log(info, LOG_ERROR, "illegal command given\n");
+ fas216_dumpstate(info);
+ print_debug_list();
+ } else if (inst & INST_DISCONNECT)
+ fas216_disconnect_intr(info);
+ else if (inst & INST_RESELECTED) /* reselected */
+ fas216_reselected_intr(info);
+ else if (inst & INST_BUSSERVICE) /* bus service request */
+ fas216_busservice_intr(info, stat, is);
+ else if (inst & INST_FUNCDONE) /* function done */
+ fas216_funcdone_intr(info, stat, is);
+ else
+ fas216_log(info, 0, "unknown interrupt received:"
+ " phase %s inst %02X is %02X stat %02X",
+ fas216_drv_phase(info), inst, is, stat);
+ handled = IRQ_HANDLED;
+ }
+ return handled;
+}
+
+static void __fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+ int tot_msglen;
+
+ /* following what the ESP driver says */
+ fas216_set_stc(info, 0);
+ fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
+
+ /* flush FIFO */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load bus-id and timeout */
+ fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+
+ /* synchronous transfers */
+ fas216_set_sync(info, SCpnt->device->id);
+
+ tot_msglen = msgqueue_msglength(&info->scsi.msgs);
+
+#ifdef DEBUG_MESSAGES
+ {
+ struct message *msg;
+ int msgnr = 0, i;
+
+ printk("scsi%d.%c: message out: ",
+ info->host->host_no, '0' + SCpnt->device->id);
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ printk("{ ");
+ for (i = 0; i < msg->length; i++)
+ printk("%02x ", msg->msg[i]);
+ printk("} ");
+ }
+ printk("\n");
+ }
+#endif
+
+ if (tot_msglen == 1 || tot_msglen == 3) {
+ /*
+ * We have an easy message length to send...
+ */
+ struct message *msg;
+ int msgnr = 0, i;
+
+ info->scsi.phase = PHASE_SELSTEPS;
+
+ /* load message bytes */
+ while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) {
+ for (i = 0; i < msg->length; i++)
+ fas216_writeb(info, REG_FF, msg->msg[i]);
+ msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF);
+ }
+
+ /* load command */
+ for (i = 0; i < SCpnt->cmd_len; i++)
+ fas216_writeb(info, REG_FF, SCpnt->cmnd[i]);
+
+ if (tot_msglen == 1)
+ fas216_cmd(info, CMD_SELECTATN);
+ else
+ fas216_cmd(info, CMD_SELECTATN3);
+ } else {
+ /*
+ * We have an unusual number of message bytes to send.
+ * Load first byte into fifo, and issue SELECT with ATN and
+ * stop steps.
+ */
+ struct message *msg = msgqueue_getmsg(&info->scsi.msgs, 0);
+
+ fas216_writeb(info, REG_FF, msg->msg[0]);
+ msg->fifo = 1;
+
+ fas216_cmd(info, CMD_SELECTATNSTOP);
+ }
+}
+
+/*
+ * Decide whether we need to perform a parity test on this device.
+ * Can also be used to force parity error conditions during initial
+ * information transfer phase (message out) for test purposes.
+ */
+static int parity_test(FAS216_Info *info, int target)
+{
+#if 0
+ if (target == 3) {
+ info->device[target].parity_check = 0;
+ return 1;
+ }
+#endif
+ return info->device[target].parity_check;
+}
+
+static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+ int disconnect_ok;
+
+ /*
+ * claim host busy
+ */
+ info->scsi.phase = PHASE_SELECTION;
+ info->scsi.SCp = SCpnt->SCp;
+ info->SCpnt = SCpnt;
+ info->dma.transfer_type = fasdma_none;
+
+ if (parity_test(info, SCpnt->device->id))
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_PTE);
+ else
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+
+ /*
+ * Don't allow request sense commands to disconnect.
+ */
+ disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE &&
+ info->device[SCpnt->device->id].disconnect_ok;
+
+ /*
+ * build outgoing message bytes
+ */
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->device->lun));
+
+ /*
+ * add tag message if required
+ */
+ if (SCpnt->tag)
+ msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag);
+
+ do {
+#ifdef SCSI2_SYNC
+ if ((info->device[SCpnt->device->id].sync_state == neg_wait ||
+ info->device[SCpnt->device->id].sync_state == neg_complete) &&
+ (SCpnt->cmnd[0] == REQUEST_SENSE ||
+ SCpnt->cmnd[0] == INQUIRY)) {
+ info->device[SCpnt->device->id].sync_state = neg_inprogress;
+ msgqueue_addmsg(&info->scsi.msgs, 5,
+ EXTENDED_MESSAGE, 3, EXTENDED_SDTR,
+ 1000 / info->ifcfg.clockrate,
+ info->ifcfg.sync_max_depth);
+ break;
+ }
+#endif
+ } while (0);
+
+ __fas216_start_command(info, SCpnt);
+}
+
+static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt)
+{
+#ifdef SCSI2_TAG
+ /*
+ * tagged queuing - allocate a new tag to this command
+ */
+ if (SCpnt->device->simple_tags && SCpnt->cmnd[0] != REQUEST_SENSE &&
+ SCpnt->cmnd[0] != INQUIRY) {
+ SCpnt->device->current_tag += 1;
+ if (SCpnt->device->current_tag == 0)
+ SCpnt->device->current_tag = 1;
+ SCpnt->tag = SCpnt->device->current_tag;
+ } else
+#endif
+ set_bit(SCpnt->device->id * 8 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+
+ info->stats.removes += 1;
+ switch (SCpnt->cmnd[0]) {
+ case WRITE_6:
+ case WRITE_10:
+ case WRITE_12:
+ info->stats.writes += 1;
+ break;
+ case READ_6:
+ case READ_10:
+ case READ_12:
+ info->stats.reads += 1;
+ break;
+ default:
+ info->stats.miscs += 1;
+ break;
+ }
+}
+
+static void fas216_do_bus_device_reset(FAS216_Info *info,
+ struct scsi_cmnd *SCpnt)
+{
+ struct message *msg;
+
+ /*
+ * claim host busy
+ */
+ info->scsi.phase = PHASE_SELECTION;
+ info->scsi.SCp = SCpnt->SCp;
+ info->SCpnt = SCpnt;
+ info->dma.transfer_type = fasdma_none;
+
+ fas216_log(info, LOG_ERROR, "sending bus device reset");
+
+ msgqueue_flush(&info->scsi.msgs);
+ msgqueue_addmsg(&info->scsi.msgs, 1, BUS_DEVICE_RESET);
+
+ /* following what the ESP driver says */
+ fas216_set_stc(info, 0);
+ fas216_cmd(info, CMD_NOP | CMD_WITHDMA);
+
+ /* flush FIFO */
+ fas216_cmd(info, CMD_FLUSHFIFO);
+
+ /* load bus-id and timeout */
+ fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id));
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+
+ /* synchronous transfers */
+ fas216_set_sync(info, SCpnt->device->id);
+
+ msg = msgqueue_getmsg(&info->scsi.msgs, 0);
+
+ fas216_writeb(info, REG_FF, BUS_DEVICE_RESET);
+ msg->fifo = 1;
+
+ fas216_cmd(info, CMD_SELECTATNSTOP);
+}
+
+/**
+ * fas216_kick - kick a command to the interface
+ * @info: our host interface to kick
+ *
+ * Kick a command to the interface, interface should be idle.
+ * Notes: Interrupts are always disabled!
+ */
+static void fas216_kick(FAS216_Info *info)
+{
+ struct scsi_cmnd *SCpnt = NULL;
+#define TYPE_OTHER 0
+#define TYPE_RESET 1
+#define TYPE_QUEUE 2
+ int where_from = TYPE_OTHER;
+
+ fas216_checkmagic(info);
+
+ /*
+ * Obtain the next command to process.
+ */
+ do {
+ if (info->rstSCpnt) {
+ SCpnt = info->rstSCpnt;
+ /* don't remove it */
+ where_from = TYPE_RESET;
+ break;
+ }
+
+ if (info->reqSCpnt) {
+ SCpnt = info->reqSCpnt;
+ info->reqSCpnt = NULL;
+ break;
+ }
+
+ if (info->origSCpnt) {
+ SCpnt = info->origSCpnt;
+ info->origSCpnt = NULL;
+ break;
+ }
+
+ /* retrieve next command */
+ if (!SCpnt) {
+ SCpnt = queue_remove_exclude(&info->queues.issue,
+ info->busyluns);
+ where_from = TYPE_QUEUE;
+ break;
+ }
+ } while (0);
+
+ if (!SCpnt) {
+ /*
+ * no command pending, so enable reselection.
+ */
+ fas216_cmd(info, CMD_ENABLESEL);
+ return;
+ }
+
+ /*
+ * We're going to start a command, so disable reselection
+ */
+ fas216_cmd(info, CMD_DISABLESEL);
+
+ if (info->scsi.disconnectable && info->SCpnt) {
+ fas216_log(info, LOG_CONNECT,
+ "moved command for %d to disconnected queue",
+ info->SCpnt->device->id);
+ queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt);
+ info->scsi.disconnectable = 0;
+ info->SCpnt = NULL;
+ }
+
+ fas216_log_command(info, LOG_CONNECT | LOG_MESSAGES, SCpnt,
+ "starting");
+
+ switch (where_from) {
+ case TYPE_QUEUE:
+ fas216_allocate_tag(info, SCpnt);
+ case TYPE_OTHER:
+ fas216_start_command(info, SCpnt);
+ break;
+ case TYPE_RESET:
+ fas216_do_bus_device_reset(info, SCpnt);
+ break;
+ }
+
+ fas216_log(info, LOG_CONNECT, "select: data pointers [%p, %X]",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+
+ /*
+ * should now get either DISCONNECT or
+ * (FUNCTION DONE with BUS SERVICE) interrupt
+ */
+}
+
+/*
+ * Clean up from issuing a BUS DEVICE RESET message to a device.
+ */
+static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
+ unsigned int result)
+{
+ fas216_log(info, LOG_ERROR, "fas216 device reset complete");
+
+ info->rstSCpnt = NULL;
+ info->rst_dev_status = 1;
+ wake_up(&info->eh_wait);
+}
+
+/**
+ * fas216_rq_sns_done - Finish processing automatic request sense command
+ * @info: interface that completed
+ * @SCpnt: command that completed
+ * @result: driver byte of result
+ *
+ * Finish processing automatic request sense command
+ */
+static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt,
+ unsigned int result)
+{
+ fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
+ "request sense complete, result=0x%04x%02x%02x",
+ result, SCpnt->SCp.Message, SCpnt->SCp.Status);
+
+ if (result != DID_OK || SCpnt->SCp.Status != GOOD)
+ /*
+ * Something went wrong. Make sure that we don't
+ * have valid data in the sense buffer that could
+ * confuse the higher levels.
+ */
+ memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer));
+//printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id);
+//{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); }
+ /*
+ * Note that we don't set SCpnt->result, since that should
+ * reflect the status of the command that we were asked by
+ * the upper layers to process. This would have been set
+ * correctly by fas216_std_done.
+ */
+ scsi_eh_restore_cmnd(SCpnt, &info->ses);
+ SCpnt->scsi_done(SCpnt);
+}
+
+/**
+ * fas216_std_done - finish processing of standard command
+ * @info: interface that completed
+ * @SCpnt: command that completed
+ * @result: driver byte of result
+ *
+ * Finish processing of standard command
+ */
+static void
+fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result)
+{
+ info->stats.fins += 1;
+
+ SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 |
+ info->scsi.SCp.Status;
+
+ fas216_log_command(info, LOG_CONNECT, SCpnt,
+ "command complete, result=0x%08x", SCpnt->result);
+
+ /*
+ * If the driver detected an error, we're all done.
+ */
+ if (host_byte(SCpnt->result) != DID_OK ||
+ msg_byte(SCpnt->result) != COMMAND_COMPLETE)
+ goto done;
+
+ /*
+ * If the command returned CHECK_CONDITION or COMMAND_TERMINATED
+ * status, request the sense information.
+ */
+ if (status_byte(SCpnt->result) == CHECK_CONDITION ||
+ status_byte(SCpnt->result) == COMMAND_TERMINATED)
+ goto request_sense;
+
+ /*
+ * If the command did not complete with GOOD status,
+ * we are all done here.
+ */
+ if (status_byte(SCpnt->result) != GOOD)
+ goto done;
+
+ /*
+ * We have successfully completed a command. Make sure that
+ * we do not have any buffers left to transfer. The world
+ * is not perfect, and we seem to occasionally hit this.
+ * It can be indicative of a buggy driver, target or the upper
+ * levels of the SCSI code.
+ */
+ if (info->scsi.SCp.ptr) {
+ switch (SCpnt->cmnd[0]) {
+ case INQUIRY:
+ case START_STOP:
+ case MODE_SENSE:
+ break;
+
+ default:
+ scmd_printk(KERN_ERR, SCpnt,
+ "incomplete data transfer detected: res=%08X ptr=%p len=%X\n",
+ SCpnt->result, info->scsi.SCp.ptr,
+ info->scsi.SCp.this_residual);
+ scsi_print_command(SCpnt);
+ set_host_byte(SCpnt, DID_ERROR);
+ goto request_sense;
+ }
+ }
+
+done:
+ if (SCpnt->scsi_done) {
+ SCpnt->scsi_done(SCpnt);
+ return;
+ }
+
+ panic("scsi%d.H: null scsi_done function in fas216_done",
+ info->host->host_no);
+
+
+request_sense:
+ if (SCpnt->cmnd[0] == REQUEST_SENSE)
+ goto done;
+
+ scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0);
+ fas216_log_target(info, LOG_CONNECT, SCpnt->device->id,
+ "requesting sense");
+ init_SCp(SCpnt);
+ SCpnt->SCp.Message = 0;
+ SCpnt->SCp.Status = 0;
+ SCpnt->tag = 0;
+ SCpnt->host_scribble = (void *)fas216_rq_sns_done;
+
+ /*
+ * Place this command into the high priority "request
+ * sense" slot. This will be the very next command
+ * executed, unless a target connects to us.
+ */
+ if (info->reqSCpnt)
+ printk(KERN_WARNING "scsi%d.%c: losing request command\n",
+ info->host->host_no, '0' + SCpnt->device->id);
+ info->reqSCpnt = SCpnt;
+}
+
+/**
+ * fas216_done - complete processing for current command
+ * @info: interface that completed
+ * @result: driver byte of result
+ *
+ * Complete processing for current command
+ */
+static void fas216_done(FAS216_Info *info, unsigned int result)
+{
+ void (*fn)(FAS216_Info *, struct scsi_cmnd *, unsigned int);
+ struct scsi_cmnd *SCpnt;
+ unsigned long flags;
+
+ fas216_checkmagic(info);
+
+ if (!info->SCpnt)
+ goto no_command;
+
+ SCpnt = info->SCpnt;
+ info->SCpnt = NULL;
+ info->scsi.phase = PHASE_IDLE;
+
+ if (info->scsi.aborting) {
+ fas216_log(info, 0, "uncaught abort - returning DID_ABORT");
+ result = DID_ABORT;
+ info->scsi.aborting = 0;
+ }
+
+ /*
+ * Sanity check the completion - if we have zero bytes left
+ * to transfer, we should not have a valid pointer.
+ */
+ if (info->scsi.SCp.ptr && info->scsi.SCp.this_residual == 0) {
+ scmd_printk(KERN_INFO, SCpnt,
+ "zero bytes left to transfer, but buffer pointer still valid: ptr=%p len=%08x\n",
+ info->scsi.SCp.ptr, info->scsi.SCp.this_residual);
+ info->scsi.SCp.ptr = NULL;
+ scsi_print_command(SCpnt);
+ }
+
+ /*
+ * Clear down this command as completed. If we need to request
+ * the sense information, fas216_kick will re-assert the busy
+ * status.
+ */
+ info->device[SCpnt->device->id].parity_check = 0;
+ clear_bit(SCpnt->device->id * 8 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+
+ fn = (void (*)(FAS216_Info *, struct scsi_cmnd *, unsigned int))SCpnt->host_scribble;
+ fn(info, SCpnt, result);
+
+ if (info->scsi.irq) {
+ spin_lock_irqsave(&info->host_lock, flags);
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+ }
+ return;
+
+no_command:
+ panic("scsi%d.H: null command in fas216_done",
+ info->host->host_no);
+}
+
+/**
+ * fas216_queue_command - queue a command for adapter to process.
+ * @SCpnt: Command to queue
+ * @done: done function to call once command is complete
+ *
+ * Queue a command for adapter to process.
+ * Returns: 0 on success, else error.
+ * Notes: io_request_lock is held, interrupts are disabled.
+ */
+static int fas216_queue_command_lck(struct scsi_cmnd *SCpnt,
+ void (*done)(struct scsi_cmnd *))
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ int result;
+
+ fas216_checkmagic(info);
+
+ fas216_log_command(info, LOG_CONNECT, SCpnt,
+ "received command (%p)", SCpnt);
+
+ SCpnt->scsi_done = done;
+ SCpnt->host_scribble = (void *)fas216_std_done;
+ SCpnt->result = 0;
+
+ init_SCp(SCpnt);
+
+ info->stats.queues += 1;
+ SCpnt->tag = 0;
+
+ spin_lock(&info->host_lock);
+
+ /*
+ * Add command into execute queue and let it complete under
+ * whatever scheme we're using.
+ */
+ result = !queue_add_cmd_ordered(&info->queues.issue, SCpnt);
+
+ /*
+ * If we successfully added the command,
+ * kick the interface to get it moving.
+ */
+ if (result == 0 && info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+ spin_unlock(&info->host_lock);
+
+ fas216_log_target(info, LOG_CONNECT, -1, "queue %s",
+ result ? "failure" : "success");
+
+ return result;
+}
+
+DEF_SCSI_QCMD(fas216_queue_command)
+
+/**
+ * fas216_internal_done - trigger restart of a waiting thread in fas216_noqueue_command
+ * @SCpnt: Command to wake
+ *
+ * Trigger restart of a waiting thread in fas216_command
+ */
+static void fas216_internal_done(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ fas216_checkmagic(info);
+
+ info->internal_done = 1;
+}
+
+/**
+ * fas216_noqueue_command - process a command for the adapter.
+ * @SCpnt: Command to queue
+ *
+ * Queue a command for adapter to process.
+ * Returns: scsi result code.
+ * Notes: io_request_lock is held, interrupts are disabled.
+ */
+static int fas216_noqueue_command_lck(struct scsi_cmnd *SCpnt,
+ void (*done)(struct scsi_cmnd *))
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ fas216_checkmagic(info);
+
+ /*
+ * We should only be using this if we don't have an interrupt.
+ * Provide some "incentive" to use the queueing code.
+ */
+ BUG_ON(info->scsi.irq);
+
+ info->internal_done = 0;
+ fas216_queue_command_lck(SCpnt, fas216_internal_done);
+
+ /*
+ * This wastes time, since we can't return until the command is
+ * complete. We can't sleep either since we may get re-entered!
+ * However, we must re-enable interrupts, or else we'll be
+ * waiting forever.
+ */
+ spin_unlock_irq(info->host->host_lock);
+
+ while (!info->internal_done) {
+ /*
+ * If we don't have an IRQ, then we must poll the card for
+ * it's interrupt, and use that to call this driver's
+ * interrupt routine. That way, we keep the command
+ * progressing. Maybe we can add some intelligence here
+ * and go to sleep if we know that the device is going
+ * to be some time (eg, disconnected).
+ */
+ if (fas216_readb(info, REG_STAT) & STAT_INT) {
+ spin_lock_irq(info->host->host_lock);
+ fas216_intr(info);
+ spin_unlock_irq(info->host->host_lock);
+ }
+ }
+
+ spin_lock_irq(info->host->host_lock);
+
+ done(SCpnt);
+
+ return 0;
+}
+
+DEF_SCSI_QCMD(fas216_noqueue_command)
+
+/*
+ * Error handler timeout function. Indicate that we timed out,
+ * and wake up any error handler process so it can continue.
+ */
+static void fas216_eh_timer(unsigned long data)
+{
+ FAS216_Info *info = (FAS216_Info *)data;
+
+ fas216_log(info, LOG_ERROR, "error handling timed out\n");
+
+ del_timer(&info->eh_timer);
+
+ if (info->rst_bus_status == 0)
+ info->rst_bus_status = -1;
+ if (info->rst_dev_status == 0)
+ info->rst_dev_status = -1;
+
+ wake_up(&info->eh_wait);
+}
+
+enum res_find {
+ res_failed, /* not found */
+ res_success, /* command on issue queue */
+ res_hw_abort /* command on disconnected dev */
+};
+
+/**
+ * fas216_do_abort - decide how to abort a command
+ * @SCpnt: command to abort
+ *
+ * Decide how to abort a command.
+ * Returns: abort status
+ */
+static enum res_find fas216_find_command(FAS216_Info *info,
+ struct scsi_cmnd *SCpnt)
+{
+ enum res_find res = res_failed;
+
+ if (queue_remove_cmd(&info->queues.issue, SCpnt)) {
+ /*
+ * The command was on the issue queue, and has not been
+ * issued yet. We can remove the command from the queue,
+ * and acknowledge the abort. Neither the device nor the
+ * interface know about the command.
+ */
+ printk("on issue queue ");
+
+ res = res_success;
+ } else if (queue_remove_cmd(&info->queues.disconnected, SCpnt)) {
+ /*
+ * The command was on the disconnected queue. We must
+ * reconnect with the device if possible, and send it
+ * an abort message.
+ */
+ printk("on disconnected queue ");
+
+ res = res_hw_abort;
+ } else if (info->SCpnt == SCpnt) {
+ printk("executing ");
+
+ switch (info->scsi.phase) {
+ /*
+ * If the interface is idle, and the command is 'disconnectable',
+ * then it is the same as on the disconnected queue.
+ */
+ case PHASE_IDLE:
+ if (info->scsi.disconnectable) {
+ info->scsi.disconnectable = 0;
+ info->SCpnt = NULL;
+ res = res_hw_abort;
+ }
+ break;
+
+ default:
+ break;
+ }
+ } else if (info->origSCpnt == SCpnt) {
+ /*
+ * The command will be executed next, but a command
+ * is currently using the interface. This is similar to
+ * being on the issue queue, except the busylun bit has
+ * been set.
+ */
+ info->origSCpnt = NULL;
+ clear_bit(SCpnt->device->id * 8 +
+ (u8)(SCpnt->device->lun & 0x7), info->busyluns);
+ printk("waiting for execution ");
+ res = res_success;
+ } else
+ printk("unknown ");
+
+ return res;
+}
+
+/**
+ * fas216_eh_abort - abort this command
+ * @SCpnt: command to abort
+ *
+ * Abort this command.
+ * Returns: FAILED if unable to abort
+ * Notes: io_request_lock is taken, and irqs are disabled
+ */
+int fas216_eh_abort(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ int result = FAILED;
+
+ fas216_checkmagic(info);
+
+ info->stats.aborts += 1;
+
+ scmd_printk(KERN_WARNING, SCpnt, "abort command\n");
+
+ print_debug_list();
+ fas216_dumpstate(info);
+
+ switch (fas216_find_command(info, SCpnt)) {
+ /*
+ * We found the command, and cleared it out. Either
+ * the command is still known to be executing on the
+ * target, or the busylun bit is not set.
+ */
+ case res_success:
+ scmd_printk(KERN_WARNING, SCpnt, "abort %p success\n", SCpnt);
+ result = SUCCESS;
+ break;
+
+ /*
+ * We need to reconnect to the target and send it an
+ * ABORT or ABORT_TAG message. We can only do this
+ * if the bus is free.
+ */
+ case res_hw_abort:
+
+ /*
+ * We are unable to abort the command for some reason.
+ */
+ default:
+ case res_failed:
+ scmd_printk(KERN_WARNING, SCpnt, "abort %p failed\n", SCpnt);
+ break;
+ }
+
+ return result;
+}
+
+/**
+ * fas216_eh_device_reset - Reset the device associated with this command
+ * @SCpnt: command specifing device to reset
+ *
+ * Reset the device associated with this command.
+ * Returns: FAILED if unable to reset.
+ * Notes: We won't be re-entered, so we'll only have one device
+ * reset on the go at one time.
+ */
+int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ unsigned long flags;
+ int i, res = FAILED, target = SCpnt->device->id;
+
+ fas216_log(info, LOG_ERROR, "device reset for target %d", target);
+
+ spin_lock_irqsave(&info->host_lock, flags);
+
+ do {
+ /*
+ * If we are currently connected to a device, and
+ * it is the device we want to reset, there is
+ * nothing we can do here. Chances are it is stuck,
+ * and we need a bus reset.
+ */
+ if (info->SCpnt && !info->scsi.disconnectable &&
+ info->SCpnt->device->id == SCpnt->device->id)
+ break;
+
+ /*
+ * We're going to be resetting this device. Remove
+ * all pending commands from the driver. By doing
+ * so, we guarantee that we won't touch the command
+ * structures except to process the reset request.
+ */
+ queue_remove_all_target(&info->queues.issue, target);
+ queue_remove_all_target(&info->queues.disconnected, target);
+ if (info->origSCpnt && info->origSCpnt->device->id == target)
+ info->origSCpnt = NULL;
+ if (info->reqSCpnt && info->reqSCpnt->device->id == target)
+ info->reqSCpnt = NULL;
+ for (i = 0; i < 8; i++)
+ clear_bit(target * 8 + i, info->busyluns);
+
+ /*
+ * Hijack this SCSI command structure to send
+ * a bus device reset message to this device.
+ */
+ SCpnt->host_scribble = (void *)fas216_devicereset_done;
+
+ info->rst_dev_status = 0;
+ info->rstSCpnt = SCpnt;
+
+ if (info->scsi.phase == PHASE_IDLE)
+ fas216_kick(info);
+
+ mod_timer(&info->eh_timer, jiffies + 30 * HZ);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ /*
+ * Wait up to 30 seconds for the reset to complete.
+ */
+ wait_event(info->eh_wait, info->rst_dev_status);
+
+ del_timer_sync(&info->eh_timer);
+ spin_lock_irqsave(&info->host_lock, flags);
+ info->rstSCpnt = NULL;
+
+ if (info->rst_dev_status == 1)
+ res = SUCCESS;
+ } while (0);
+
+ SCpnt->host_scribble = NULL;
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ fas216_log(info, LOG_ERROR, "device reset complete: %s\n",
+ res == SUCCESS ? "success" : "failed");
+
+ return res;
+}
+
+/**
+ * fas216_eh_bus_reset - Reset the bus associated with the command
+ * @SCpnt: command specifing bus to reset
+ *
+ * Reset the bus associated with the command.
+ * Returns: FAILED if unable to reset.
+ * Notes: Further commands are blocked.
+ */
+int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+ unsigned long flags;
+ struct scsi_device *SDpnt;
+
+ fas216_checkmagic(info);
+ fas216_log(info, LOG_ERROR, "resetting bus");
+
+ info->stats.bus_resets += 1;
+
+ spin_lock_irqsave(&info->host_lock, flags);
+
+ /*
+ * Stop all activity on this interface.
+ */
+ fas216_aborttransfer(info);
+ fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
+
+ /*
+ * Clear any pending interrupts.
+ */
+ while (fas216_readb(info, REG_STAT) & STAT_INT)
+ fas216_readb(info, REG_INST);
+
+ info->rst_bus_status = 0;
+
+ /*
+ * For each attached hard-reset device, clear out
+ * all command structures. Leave the running
+ * command in place.
+ */
+ shost_for_each_device(SDpnt, info->host) {
+ int i;
+
+ if (SDpnt->soft_reset)
+ continue;
+
+ queue_remove_all_target(&info->queues.issue, SDpnt->id);
+ queue_remove_all_target(&info->queues.disconnected, SDpnt->id);
+ if (info->origSCpnt && info->origSCpnt->device->id == SDpnt->id)
+ info->origSCpnt = NULL;
+ if (info->reqSCpnt && info->reqSCpnt->device->id == SDpnt->id)
+ info->reqSCpnt = NULL;
+ info->SCpnt = NULL;
+
+ for (i = 0; i < 8; i++)
+ clear_bit(SDpnt->id * 8 + i, info->busyluns);
+ }
+
+ info->scsi.phase = PHASE_IDLE;
+
+ /*
+ * Reset the SCSI bus. Device cleanup happens in
+ * the interrupt handler.
+ */
+ fas216_cmd(info, CMD_RESETSCSI);
+
+ mod_timer(&info->eh_timer, jiffies + HZ);
+ spin_unlock_irqrestore(&info->host_lock, flags);
+
+ /*
+ * Wait one second for the interrupt.
+ */
+ wait_event(info->eh_wait, info->rst_bus_status);
+ del_timer_sync(&info->eh_timer);
+
+ fas216_log(info, LOG_ERROR, "bus reset complete: %s\n",
+ info->rst_bus_status == 1 ? "success" : "failed");
+
+ return info->rst_bus_status == 1 ? SUCCESS : FAILED;
+}
+
+/**
+ * fas216_init_chip - Initialise FAS216 state after reset
+ * @info: state structure for interface
+ *
+ * Initialise FAS216 state after reset
+ */
+static void fas216_init_chip(FAS216_Info *info)
+{
+ unsigned int clock = ((info->ifcfg.clockrate - 1) / 5 + 1) & 7;
+ fas216_writeb(info, REG_CLKF, clock);
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ fas216_writeb(info, REG_CNTL2, info->scsi.cfg[1]);
+ fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]);
+ fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout);
+ fas216_writeb(info, REG_SOF, 0);
+ fas216_writeb(info, REG_STP, info->scsi.async_stp);
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+}
+
+/**
+ * fas216_eh_host_reset - Reset the host associated with this command
+ * @SCpnt: command specifing host to reset
+ *
+ * Reset the host associated with this command.
+ * Returns: FAILED if unable to reset.
+ * Notes: io_request_lock is taken, and irqs are disabled
+ */
+int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
+{
+ FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata;
+
+ spin_lock_irq(info->host->host_lock);
+
+ fas216_checkmagic(info);
+
+ fas216_log(info, LOG_ERROR, "resetting host");
+
+ /*
+ * Reset the SCSI chip.
+ */
+ fas216_cmd(info, CMD_RESETCHIP);
+
+ /*
+ * Ugly ugly ugly!
+ * We need to release the host_lock and enable
+ * IRQs if we sleep, but we must relock and disable
+ * IRQs after the sleep.
+ */
+ spin_unlock_irq(info->host->host_lock);
+ msleep(50 * 1000/100);
+ spin_lock_irq(info->host->host_lock);
+
+ /*
+ * Release the SCSI reset.
+ */
+ fas216_cmd(info, CMD_NOP);
+
+ fas216_init_chip(info);
+
+ spin_unlock_irq(info->host->host_lock);
+ return SUCCESS;
+}
+
+#define TYPE_UNKNOWN 0
+#define TYPE_NCR53C90 1
+#define TYPE_NCR53C90A 2
+#define TYPE_NCR53C9x 3
+#define TYPE_Am53CF94 4
+#define TYPE_EmFAS216 5
+#define TYPE_QLFAS216 6
+
+static char *chip_types[] = {
+ "unknown",
+ "NS NCR53C90",
+ "NS NCR53C90A",
+ "NS NCR53C9x",
+ "AMD Am53CF94",
+ "Emulex FAS216",
+ "QLogic FAS216"
+};
+
+static int fas216_detect_type(FAS216_Info *info)
+{
+ int family, rev;
+
+ /*
+ * Reset the chip.
+ */
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_NOP);
+
+ /*
+ * Check to see if control reg 2 is present.
+ */
+ fas216_writeb(info, REG_CNTL3, 0);
+ fas216_writeb(info, REG_CNTL2, CNTL2_S2FE);
+
+ /*
+ * If we are unable to read back control reg 2
+ * correctly, it is not present, and we have a
+ * NCR53C90.
+ */
+ if ((fas216_readb(info, REG_CNTL2) & (~0xe0)) != CNTL2_S2FE)
+ return TYPE_NCR53C90;
+
+ /*
+ * Now, check control register 3
+ */
+ fas216_writeb(info, REG_CNTL2, 0);
+ fas216_writeb(info, REG_CNTL3, 0);
+ fas216_writeb(info, REG_CNTL3, 5);
+
+ /*
+ * If we are unable to read the register back
+ * correctly, we have a NCR53C90A
+ */
+ if (fas216_readb(info, REG_CNTL3) != 5)
+ return TYPE_NCR53C90A;
+
+ /*
+ * Now read the ID from the chip.
+ */
+ fas216_writeb(info, REG_CNTL3, 0);
+
+ fas216_writeb(info, REG_CNTL3, CNTL3_ADIDCHK);
+ fas216_writeb(info, REG_CNTL3, 0);
+
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_WITHDMA | CMD_NOP);
+
+ fas216_writeb(info, REG_CNTL2, CNTL2_ENF);
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ udelay(50);
+ fas216_writeb(info, REG_CMD, CMD_NOP);
+
+ rev = fas216_readb(info, REG_ID);
+ family = rev >> 3;
+ rev &= 7;
+
+ switch (family) {
+ case 0x01:
+ if (rev == 4)
+ return TYPE_Am53CF94;
+ break;
+
+ case 0x02:
+ switch (rev) {
+ case 2:
+ return TYPE_EmFAS216;
+ case 3:
+ return TYPE_QLFAS216;
+ }
+ break;
+
+ default:
+ break;
+ }
+ printk("family %x rev %x\n", family, rev);
+ return TYPE_NCR53C9x;
+}
+
+/**
+ * fas216_reset_state - Initialise driver internal state
+ * @info: state to initialise
+ *
+ * Initialise driver internal state
+ */
+static void fas216_reset_state(FAS216_Info *info)
+{
+ int i;
+
+ fas216_checkmagic(info);
+
+ fas216_bus_reset(info);
+
+ /*
+ * Clear out all stale info in our state structure
+ */
+ memset(info->busyluns, 0, sizeof(info->busyluns));
+ info->scsi.disconnectable = 0;
+ info->scsi.aborting = 0;
+
+ for (i = 0; i < 8; i++) {
+ info->device[i].parity_enabled = 0;
+ info->device[i].parity_check = 1;
+ }
+
+ /*
+ * Drain all commands on disconnected queue
+ */
+ while (queue_remove(&info->queues.disconnected) != NULL);
+
+ /*
+ * Remove executing commands.
+ */
+ info->SCpnt = NULL;
+ info->reqSCpnt = NULL;
+ info->rstSCpnt = NULL;
+ info->origSCpnt = NULL;
+}
+
+/**
+ * fas216_init - initialise FAS/NCR/AMD SCSI structures.
+ * @host: a driver-specific filled-out structure
+ *
+ * Initialise FAS/NCR/AMD SCSI structures.
+ * Returns: 0 on success
+ */
+int fas216_init(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ info->magic_start = MAGIC;
+ info->magic_end = MAGIC;
+ info->host = host;
+ info->scsi.cfg[0] = host->this_id | CNTL1_PERE;
+ info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE;
+ info->scsi.cfg[2] = info->ifcfg.cntl3 |
+ CNTL3_ADIDCHK | CNTL3_QTAG | CNTL3_G2CB | CNTL3_LBTM;
+ info->scsi.async_stp = fas216_syncperiod(info, info->ifcfg.asyncperiod);
+
+ info->rst_dev_status = -1;
+ info->rst_bus_status = -1;
+ init_waitqueue_head(&info->eh_wait);
+ init_timer(&info->eh_timer);
+ info->eh_timer.data = (unsigned long)info;
+ info->eh_timer.function = fas216_eh_timer;
+
+ spin_lock_init(&info->host_lock);
+
+ memset(&info->stats, 0, sizeof(info->stats));
+
+ msgqueue_initialise(&info->scsi.msgs);
+
+ if (!queue_initialise(&info->queues.issue))
+ return -ENOMEM;
+
+ if (!queue_initialise(&info->queues.disconnected)) {
+ queue_free(&info->queues.issue);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/**
+ * fas216_add - initialise FAS/NCR/AMD SCSI ic.
+ * @host: a driver-specific filled-out structure
+ * @dev: parent device
+ *
+ * Initialise FAS/NCR/AMD SCSI ic.
+ * Returns: 0 on success
+ */
+int fas216_add(struct Scsi_Host *host, struct device *dev)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+ int type, ret;
+
+ if (info->ifcfg.clockrate <= 10 || info->ifcfg.clockrate > 40) {
+ printk(KERN_CRIT "fas216: invalid clock rate %u MHz\n",
+ info->ifcfg.clockrate);
+ return -EINVAL;
+ }
+
+ fas216_reset_state(info);
+ type = fas216_detect_type(info);
+ info->scsi.type = chip_types[type];
+
+ udelay(300);
+
+ /*
+ * Initialise the chip correctly.
+ */
+ fas216_init_chip(info);
+
+ /*
+ * Reset the SCSI bus. We don't want to see
+ * the resulting reset interrupt, so mask it
+ * out.
+ */
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_DISR);
+ fas216_writeb(info, REG_CMD, CMD_RESETSCSI);
+
+ /*
+ * scsi standard says wait 250ms
+ */
+ spin_unlock_irq(info->host->host_lock);
+ msleep(100*1000/100);
+ spin_lock_irq(info->host->host_lock);
+
+ fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]);
+ fas216_readb(info, REG_INST);
+
+ fas216_checkmagic(info);
+
+ ret = scsi_add_host(host, dev);
+ if (ret)
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ else
+ scsi_scan_host(host);
+
+ return ret;
+}
+
+void fas216_remove(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ fas216_checkmagic(info);
+ scsi_remove_host(host);
+
+ fas216_writeb(info, REG_CMD, CMD_RESETCHIP);
+ scsi_host_put(host);
+}
+
+/**
+ * fas216_release - release all resources for FAS/NCR/AMD SCSI ic.
+ * @host: a driver-specific filled-out structure
+ *
+ * release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
+ */
+void fas216_release(struct Scsi_Host *host)
+{
+ FAS216_Info *info = (FAS216_Info *)host->hostdata;
+
+ queue_free(&info->queues.disconnected);
+ queue_free(&info->queues.issue);
+}
+
+void fas216_print_host(FAS216_Info *info, struct seq_file *m)
+{
+ seq_printf(m,
+ "\n"
+ "Chip : %s\n"
+ " Address: 0x%p\n"
+ " IRQ : %d\n"
+ " DMA : %d\n",
+ info->scsi.type, info->scsi.io_base,
+ info->scsi.irq, info->scsi.dma);
+}
+
+void fas216_print_stats(FAS216_Info *info, struct seq_file *m)
+{
+ seq_printf(m, "\n"
+ "Command Statistics:\n"
+ " Queued : %u\n"
+ " Issued : %u\n"
+ " Completed : %u\n"
+ " Reads : %u\n"
+ " Writes : %u\n"
+ " Others : %u\n"
+ " Disconnects: %u\n"
+ " Aborts : %u\n"
+ " Bus resets : %u\n"
+ " Host resets: %u\n",
+ info->stats.queues, info->stats.removes,
+ info->stats.fins, info->stats.reads,
+ info->stats.writes, info->stats.miscs,
+ info->stats.disconnects, info->stats.aborts,
+ info->stats.bus_resets, info->stats.host_resets);
+}
+
+void fas216_print_devices(FAS216_Info *info, struct seq_file *m)
+{
+ struct fas216_device *dev;
+ struct scsi_device *scd;
+
+ seq_puts(m, "Device/Lun TaggedQ Parity Sync\n");
+
+ shost_for_each_device(scd, info->host) {
+ dev = &info->device[scd->id];
+ seq_printf(m, " %d/%llu ", scd->id, scd->lun);
+ if (scd->tagged_supported)
+ seq_printf(m, "%3sabled(%3d) ",
+ scd->simple_tags ? "en" : "dis",
+ scd->current_tag);
+ else
+ seq_puts(m, "unsupported ");
+
+ seq_printf(m, "%3sabled ", dev->parity_enabled ? "en" : "dis");
+
+ if (dev->sof)
+ seq_printf(m, "offset %d, %d ns\n",
+ dev->sof, dev->period * 4);
+ else
+ seq_puts(m, "async\n");
+ }
+}
+
+EXPORT_SYMBOL(fas216_init);
+EXPORT_SYMBOL(fas216_add);
+EXPORT_SYMBOL(fas216_queue_command);
+EXPORT_SYMBOL(fas216_noqueue_command);
+EXPORT_SYMBOL(fas216_intr);
+EXPORT_SYMBOL(fas216_remove);
+EXPORT_SYMBOL(fas216_release);
+EXPORT_SYMBOL(fas216_eh_abort);
+EXPORT_SYMBOL(fas216_eh_device_reset);
+EXPORT_SYMBOL(fas216_eh_bus_reset);
+EXPORT_SYMBOL(fas216_eh_host_reset);
+EXPORT_SYMBOL(fas216_print_host);
+EXPORT_SYMBOL(fas216_print_stats);
+EXPORT_SYMBOL(fas216_print_devices);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff