1 /**************************************************************************
2 * Initio 9100 device driver for Linux.
4 * Copyright (c) 1994-1998 Initio Corporation
5 * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
6 * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
7 * Copyright (c) 2007 Red Hat
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *************************************************************************
28 * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
31 * 08/06/97 hc - v1.01h
32 * - Support inic-940 and inic-935
33 * 09/26/97 hc - v1.01i
34 * - Make correction from J.W. Schultz suggestion
35 * 10/13/97 hc - Support reset function
36 * 10/21/97 hc - v1.01j
37 * - Support 32 LUN (SCSI 3)
38 * 01/14/98 hc - v1.01k
39 * - Fix memory allocation problem
40 * 03/04/98 hc - v1.01l
41 * - Fix tape rewind which will hang the system problem
42 * - Set can_queue to initio_num_scb
43 * 06/25/98 hc - v1.01m
44 * - Get it work for kernel version >= 2.1.75
45 * - Dynamic assign SCSI bus reset holding time in initio_init()
46 * 07/02/98 hc - v1.01n
48 * 08/07/98 hc - v1.01o
49 * - Change the initio_abort_srb routine to use scsi_done. <01>
51 * - Change the INI9100U define and proc_dir_entry to
52 * reflect the newer Kernel 2.1.118, but the v1.o1o
53 * should work with Kernel 2.1.118.
54 * 09/20/98 wh - v1.02a
55 * - Support Abort command.
56 * - Handle reset routine.
59 * 12/09/98 bv - v1.03a
60 * - Removed unused code
61 * 12/13/98 bv - v1.03b
62 * - Remove cli() locking for kernels >= 2.1.95. This uses
63 * spinlocks to serialize access to the pSRB_head and
64 * pSRB_tail members of the HCS structure.
65 * 09/01/99 bv - v1.03d
66 * - Fixed a deadlock problem in SMP.
67 * 21/01/99 bv - v1.03e
68 * - Add support for the Domex 3192U PCI SCSI
69 * This is a slightly modified patch by
70 * Brian Macy <bmacy@sunshinecomputing.com>
71 * 22/02/99 bv - v1.03f
72 * - Didn't detect the INIC-950 in 2.0.x correctly.
74 * 05/07/99 bv - v1.03g
75 * - Changed the assumption that HZ = 100
77 * - added new DMA API support
78 * 06/01/04 jmd - v1.04a
79 * - Re-add reset_bus support
80 **************************************************************************/
82 #include <linux/module.h>
83 #include <linux/errno.h>
84 #include <linux/delay.h>
85 #include <linux/pci.h>
86 #include <linux/init.h>
87 #include <linux/blkdev.h>
88 #include <linux/spinlock.h>
89 #include <linux/stat.h>
90 #include <linux/kernel.h>
91 #include <linux/proc_fs.h>
92 #include <linux/string.h>
93 #include <linux/interrupt.h>
94 #include <linux/ioport.h>
95 #include <linux/slab.h>
96 #include <linux/jiffies.h>
97 #include <linux/dma-mapping.h>
100 #include <scsi/scsi.h>
101 #include <scsi/scsi_cmnd.h>
102 #include <scsi/scsi_device.h>
103 #include <scsi/scsi_host.h>
104 #include <scsi/scsi_tcq.h>
108 #define SENSE_SIZE 14
110 #define i91u_MAXQUEUE 2
111 #define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
113 #define I950_DEVICE_ID 0x9500 /* Initio's inic-950 product ID */
114 #define I940_DEVICE_ID 0x9400 /* Initio's inic-940 product ID */
115 #define I935_DEVICE_ID 0x9401 /* Initio's inic-935 product ID */
116 #define I920_DEVICE_ID 0x0002 /* Initio's other product ID */
119 static unsigned int i91u_debug = DEBUG_DEFAULT;
122 static int initio_tag_enable = 1;
125 static int setup_debug = 0;
128 static void i91uSCBPost(u8 * pHcb, u8 * pScb);
130 /* PCI Devices supported by this driver */
131 static struct pci_device_id i91u_pci_devices[] = {
132 { PCI_VENDOR_ID_INIT, I950_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
133 { PCI_VENDOR_ID_INIT, I940_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
134 { PCI_VENDOR_ID_INIT, I935_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
135 { PCI_VENDOR_ID_INIT, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
136 { PCI_VENDOR_ID_DOMEX, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
139 MODULE_DEVICE_TABLE(pci, i91u_pci_devices);
141 #define DEBUG_INTERRUPT 0
142 #define DEBUG_QUEUE 0
143 #define DEBUG_STATE 0
146 /*--- forward references ---*/
147 static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
148 static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
150 static int tulip_main(struct initio_host * host);
152 static int initio_next_state(struct initio_host * host);
153 static int initio_state_1(struct initio_host * host);
154 static int initio_state_2(struct initio_host * host);
155 static int initio_state_3(struct initio_host * host);
156 static int initio_state_4(struct initio_host * host);
157 static int initio_state_5(struct initio_host * host);
158 static int initio_state_6(struct initio_host * host);
159 static int initio_state_7(struct initio_host * host);
160 static int initio_xfer_data_in(struct initio_host * host);
161 static int initio_xfer_data_out(struct initio_host * host);
162 static int initio_xpad_in(struct initio_host * host);
163 static int initio_xpad_out(struct initio_host * host);
164 static int initio_status_msg(struct initio_host * host);
166 static int initio_msgin(struct initio_host * host);
167 static int initio_msgin_sync(struct initio_host * host);
168 static int initio_msgin_accept(struct initio_host * host);
169 static int initio_msgout_reject(struct initio_host * host);
170 static int initio_msgin_extend(struct initio_host * host);
172 static int initio_msgout_ide(struct initio_host * host);
173 static int initio_msgout_abort_targ(struct initio_host * host);
174 static int initio_msgout_abort_tag(struct initio_host * host);
176 static int initio_bus_device_reset(struct initio_host * host);
177 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
178 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
179 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
180 static int int_initio_busfree(struct initio_host * host);
181 static int int_initio_scsi_rst(struct initio_host * host);
182 static int int_initio_bad_seq(struct initio_host * host);
183 static int int_initio_resel(struct initio_host * host);
184 static int initio_sync_done(struct initio_host * host);
185 static int wdtr_done(struct initio_host * host);
186 static int wait_tulip(struct initio_host * host);
187 static int initio_wait_done_disc(struct initio_host * host);
188 static int initio_wait_disc(struct initio_host * host);
189 static void tulip_scsi(struct initio_host * host);
190 static int initio_post_scsi_rst(struct initio_host * host);
192 static void initio_se2_ew_en(unsigned long base);
193 static void initio_se2_ew_ds(unsigned long base);
194 static int initio_se2_rd_all(unsigned long base);
195 static void initio_se2_update_all(unsigned long base); /* setup default pattern */
196 static void initio_read_eeprom(unsigned long base);
198 /* ---- INTERNAL VARIABLES ---- */
200 static NVRAM i91unvram;
201 static NVRAM *i91unvramp;
203 static u8 i91udftNvRam[64] =
205 /*----------- header -----------*/
206 0x25, 0xc9, /* Signature */
209 /* -- Host Adapter Structure -- */
210 0x95, /* ModelByte0 */
211 0x00, /* ModelByte1 */
212 0x00, /* ModelInfo */
214 NBC1_DEFAULT, /* BIOSConfig1 */
218 /* SCSI channel 0 and target Structure */
220 NCC1_DEFAULT, /* SCSIconfig1 */
222 0x10, /* NumSCSItarget */
224 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
225 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
226 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
227 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
229 /* SCSI channel 1 and target Structure */
231 NCC1_DEFAULT, /* SCSIconfig1 */
233 0x10, /* NumSCSItarget */
235 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
236 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
237 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
238 NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
239 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
240 0, 0}; /* - CheckSum - */
243 static u8 initio_rate_tbl[8] = /* fast 20 */
245 /* nanosecond divide by 4 */
247 18, /* 75ns, 13.3M */
250 37, /* 150ns, 6.6M */
251 43, /* 175ns, 5.7M */
256 static void initio_do_pause(unsigned amount)
258 /* Pause for amount jiffies */
259 unsigned long the_time = jiffies + amount;
261 while (time_before_eq(jiffies, the_time))
265 /*-- forward reference --*/
267 /******************************************************************
268 Input: instruction for Serial E2PROM
270 EX: se2_rd(0 call se2_instr() to send address and read command
272 StartBit OP_Code Address Data
273 --------- -------- ------------------ -------
274 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
276 +-----------------------------------------------------
279 +--+ +--+ +--+ +--+ +--+
282 CLK -------+ +--+ +--+ +--+ +--+ +--
283 (leading edge trigger)
287 DI ----+ +--0------------------
288 (address and cmd sent to nvram)
290 -------------------------------------------+
293 (data sent from nvram)
296 ******************************************************************/
299 * initio_se2_instr - bitbang an instruction
300 * @base: Base of InitIO controller
301 * @instr: Instruction for serial E2PROM
303 * Bitbang an instruction out to the serial E2Prom
306 static void initio_se2_instr(unsigned long base, u8 instr)
311 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
313 outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
316 for (i = 0; i < 8; i++) {
318 b = SE2CS | SE2DO; /* -CLK+dataBit */
320 b = SE2CS; /* -CLK */
321 outb(b, base + TUL_NVRAM);
323 outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
327 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
333 * initio_se2_ew_en - Enable erase/write
334 * @base: Base address of InitIO controller
336 * Enable erase/write state of serial EEPROM
338 void initio_se2_ew_en(unsigned long base)
340 initio_se2_instr(base, 0x30); /* EWEN */
341 outb(0, base + TUL_NVRAM); /* -CS */
347 * initio_se2_ew_ds - Disable erase/write
348 * @base: Base address of InitIO controller
350 * Disable erase/write state of serial EEPROM
352 void initio_se2_ew_ds(unsigned long base)
354 initio_se2_instr(base, 0); /* EWDS */
355 outb(0, base + TUL_NVRAM); /* -CS */
361 * initio_se2_rd - read E2PROM word
362 * @base: Base of InitIO controller
363 * @addr: Address of word in E2PROM
365 * Read a word from the NV E2PROM device
367 static u16 initio_se2_rd(unsigned long base, u8 addr)
373 instr = (u8) (addr | 0x80);
374 initio_se2_instr(base, instr); /* READ INSTR */
376 for (i = 15; i >= 0; i--) {
377 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
379 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
381 /* sample data after the following edge of clock */
382 rb = inb(base + TUL_NVRAM);
385 udelay(30); /* 6/20/95 */
388 outb(0, base + TUL_NVRAM); /* no chip select */
394 * initio_se2_wr - read E2PROM word
395 * @base: Base of InitIO controller
396 * @addr: Address of word in E2PROM
397 * @val: Value to write
399 * Write a word to the NV E2PROM device. Used when recovering from
400 * a problem with the NV.
402 static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
408 instr = (u8) (addr | 0x40);
409 initio_se2_instr(base, instr); /* WRITE INSTR */
410 for (i = 15; i >= 0; i--) {
412 outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
414 outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
416 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
420 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
422 outb(0, base + TUL_NVRAM); /* -CS */
425 outb(SE2CS, base + TUL_NVRAM); /* +CS */
429 outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
431 outb(SE2CS, base + TUL_NVRAM); /* -CLK */
433 if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
434 break; /* write complete */
436 outb(0, base + TUL_NVRAM); /* -CS */
440 * initio_se2_rd_all - read hostadapter NV configuration
441 * @base: Base address of InitIO controller
443 * Reads the E2PROM data into main memory. Ensures that the checksum
444 * and header marker are valid. Returns 1 on success -1 on error.
447 static int initio_se2_rd_all(unsigned long base)
453 i91unvramp = &i91unvram;
454 np = (u16 *) i91unvramp;
455 for (i = 0; i < 32; i++)
456 *np++ = initio_se2_rd(base, i);
458 /* Is signature "ini" ok ? */
459 if (i91unvramp->NVM_Signature != INI_SIGNATURE)
461 /* Is ckecksum ok ? */
462 np = (u16 *) i91unvramp;
463 for (i = 0; i < 31; i++)
465 if (i91unvramp->NVM_CheckSum != chksum)
471 * initio_se2_update_all - Update E2PROM
472 * @base: Base of InitIO controller
474 * Update the E2PROM by wrting any changes into the E2PROM
475 * chip, rewriting the checksum.
477 static void initio_se2_update_all(unsigned long base)
478 { /* setup default pattern */
483 i91unvramp = &i91unvram;
484 /* Calculate checksum first */
485 np = (u16 *) i91udftNvRam;
486 for (i = 0; i < 31; i++)
489 initio_se2_ew_en(base); /* Enable write */
491 np = (u16 *) i91udftNvRam;
492 np1 = (u16 *) i91unvramp;
493 for (i = 0; i < 32; i++, np++, np1++) {
495 initio_se2_wr(base, i, *np);
497 initio_se2_ew_ds(base); /* Disable write */
501 * initio_read_eeprom - Retrieve configuration
502 * @base: Base of InitIO Host Adapter
504 * Retrieve the host adapter configuration data from E2Prom. If the
505 * data is invalid then the defaults are used and are also restored
506 * into the E2PROM. This forms the access point for the SCSI driver
507 * into the E2PROM layer, the other functions for the E2PROM are all
510 * Must be called single threaded, uses a shared global area.
513 static void initio_read_eeprom(unsigned long base)
517 i91unvramp = &i91unvram;
518 /* Enable EEProm programming */
519 gctrl = inb(base + TUL_GCTRL);
520 outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
521 if (initio_se2_rd_all(base) != 1) {
522 initio_se2_update_all(base); /* setup default pattern */
523 initio_se2_rd_all(base); /* load again */
525 /* Disable EEProm programming */
526 gctrl = inb(base + TUL_GCTRL);
527 outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
531 * initio_stop_bm - stop bus master
532 * @host: InitIO we are stopping
534 * Stop any pending DMA operation, aborting the DMA if necessary
537 static void initio_stop_bm(struct initio_host * host)
540 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
541 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
542 /* wait Abort DMA xfer done */
543 while ((inb(host->addr + TUL_Int) & XABT) == 0)
546 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
550 * initio_reset_scsi - Reset SCSI host controller
551 * @host: InitIO host to reset
552 * @seconds: Recovery time
554 * Perform a full reset of the SCSI subsystem.
557 static int initio_reset_scsi(struct initio_host * host, int seconds)
559 outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
561 while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
564 /* reset tulip chip */
565 outb(0, host->addr + TUL_SSignal);
567 /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
568 /* SONY 5200 tape drive won't work if only stall for 1 sec */
569 /* FIXME: this is a very long busy wait right now */
570 initio_do_pause(seconds * HZ);
572 inb(host->addr + TUL_SInt);
573 return SCSI_RESET_SUCCESS;
577 * initio_init - set up an InitIO host adapter
578 * @host: InitIO host adapter
579 * @num_scbs: Number of SCBS
580 * @bios_addr: BIOS address
582 * Set up the host adapter and devices according to the configuration
583 * retrieved from the E2PROM.
585 * Locking: Calls E2PROM layer code which is not re-enterable so must
586 * run single threaded for now.
589 static void initio_init(struct initio_host * host, u8 *bios_addr)
595 /* Get E2Prom configuration */
596 initio_read_eeprom(host->addr);
597 if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
602 host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
604 host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
605 host->idmask = ~(1 << host->scsi_id);
608 /* Enable parity error response */
609 outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
612 /* Mask all the interrupt */
613 outb(0x1F, host->addr + TUL_Mask);
615 initio_stop_bm(host);
616 /* --- Initialize the tulip --- */
617 outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
619 /* program HBA's SCSI ID */
620 outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
622 /* Enable Initiator Mode ,phase latch,alternate sync period mode,
623 disable SCSI reset */
624 if (host->config & HCC_EN_PAR)
625 host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
627 host->sconf1 = (TSC_INITDEFAULT);
628 outb(host->sconf1, host->addr + TUL_SConfig);
630 /* Enable HW reselect */
631 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
633 outb(0, host->addr + TUL_SPeriod);
635 /* selection time out = 250 ms */
636 outb(153, host->addr + TUL_STimeOut);
638 /* Enable SCSI terminator */
639 outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
640 host->addr + TUL_XCtrl);
641 outb(((host->config & HCC_AUTO_TERM) >> 4) |
642 (inb(host->addr + TUL_GCTRL1) & 0xFE),
643 host->addr + TUL_GCTRL1);
646 flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
647 heads = bios_addr + 0x180;
650 host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
651 if (host->targets[i].flags & TCF_EN_255)
652 host->targets[i].drv_flags = TCF_DRV_255_63;
654 host->targets[i].drv_flags = 0;
655 host->targets[i].js_period = 0;
656 host->targets[i].sconfig0 = host->sconf1;
657 host->targets[i].heads = *heads++;
658 if (host->targets[i].heads == 255)
659 host->targets[i].drv_flags = TCF_DRV_255_63;
661 host->targets[i].drv_flags = 0;
662 host->targets[i].sectors = *heads++;
663 host->targets[i].flags &= ~TCF_BUSY;
664 host->act_tags[i] = 0;
665 host->max_tags[i] = 0xFF;
667 printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
668 host->addr, host->pci_dev->irq,
669 host->bios_addr, host->scsi_id);
671 if (host->config & HCC_SCSI_RESET) {
672 printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
673 initio_reset_scsi(host, 10);
675 outb(0x17, host->addr + TUL_SCFG1);
676 outb(0xE9, host->addr + TUL_SIntEnable);
680 * initio_alloc_scb - Allocate an SCB
681 * @host: InitIO host we are allocating for
683 * Walk the SCB list for the controller and allocate a free SCB if
686 static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
688 struct scsi_ctrl_blk *scb;
691 spin_lock_irqsave(&host->avail_lock, flags);
692 if ((scb = host->first_avail) != NULL) {
694 printk("find scb at %p\n", scb);
696 if ((host->first_avail = scb->next) == NULL)
697 host->last_avail = NULL;
699 scb->status = SCB_RENT;
701 spin_unlock_irqrestore(&host->avail_lock, flags);
706 * initio_release_scb - Release an SCB
707 * @host: InitIO host that owns the SCB
708 * @cmnd: SCB command block being returned
710 * Return an allocated SCB to the host free list
713 static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
718 printk("Release SCB %p; ", cmnd);
720 spin_lock_irqsave(&(host->avail_lock), flags);
724 if (host->last_avail != NULL) {
725 host->last_avail->next = cmnd;
726 host->last_avail = cmnd;
728 host->first_avail = cmnd;
729 host->last_avail = cmnd;
731 spin_unlock_irqrestore(&(host->avail_lock), flags);
734 /***************************************************************************/
735 static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
739 printk("Append pend SCB %p; ", scbp);
741 scbp->status = SCB_PEND;
743 if (host->last_pending != NULL) {
744 host->last_pending->next = scbp;
745 host->last_pending = scbp;
747 host->first_pending = scbp;
748 host->last_pending = scbp;
752 /***************************************************************************/
753 static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
757 printk("Push pend SCB %p; ", scbp);
759 scbp->status = SCB_PEND;
760 if ((scbp->next = host->first_pending) != NULL) {
761 host->first_pending = scbp;
763 host->first_pending = scbp;
764 host->last_pending = scbp;
768 static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
770 struct scsi_ctrl_blk *first;
773 first = host->first_pending;
774 while (first != NULL) {
775 if (first->opcode != ExecSCSI)
777 if (first->tagmsg == 0) {
778 if ((host->act_tags[first->target] == 0) &&
779 !(host->targets[first->target].flags & TCF_BUSY))
782 if ((host->act_tags[first->target] >=
783 host->max_tags[first->target]) |
784 (host->targets[first->target].flags & TCF_BUSY)) {
795 static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
797 struct scsi_ctrl_blk *tmp, *prev;
800 printk("unlink pend SCB %p; ", scb);
803 prev = tmp = host->first_pending;
804 while (tmp != NULL) {
805 if (scb == tmp) { /* Unlink this SCB */
806 if (tmp == host->first_pending) {
807 if ((host->first_pending = tmp->next) == NULL)
808 host->last_pending = NULL;
810 prev->next = tmp->next;
811 if (tmp == host->last_pending)
812 host->last_pending = prev;
822 static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
826 printk("append busy SCB %p; ", scbp);
829 host->act_tags[scbp->target]++;
831 host->targets[scbp->target].flags |= TCF_BUSY;
832 scbp->status = SCB_BUSY;
834 if (host->last_busy != NULL) {
835 host->last_busy->next = scbp;
836 host->last_busy = scbp;
838 host->first_busy = scbp;
839 host->last_busy = scbp;
843 /***************************************************************************/
844 static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
846 struct scsi_ctrl_blk *tmp;
849 if ((tmp = host->first_busy) != NULL) {
850 if ((host->first_busy = tmp->next) == NULL)
851 host->last_busy = NULL;
854 host->act_tags[tmp->target]--;
856 host->targets[tmp->target].flags &= ~TCF_BUSY;
859 printk("Pop busy SCB %p; ", tmp);
864 /***************************************************************************/
865 static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
867 struct scsi_ctrl_blk *tmp, *prev;
870 printk("unlink busy SCB %p; ", scb);
873 prev = tmp = host->first_busy;
874 while (tmp != NULL) {
875 if (scb == tmp) { /* Unlink this SCB */
876 if (tmp == host->first_busy) {
877 if ((host->first_busy = tmp->next) == NULL)
878 host->last_busy = NULL;
880 prev->next = tmp->next;
881 if (tmp == host->last_busy)
882 host->last_busy = prev;
886 host->act_tags[tmp->target]--;
888 host->targets[tmp->target].flags &= ~TCF_BUSY;
897 struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
899 struct scsi_ctrl_blk *tmp, *prev;
903 prev = tmp = host->first_busy;
904 while (tmp != NULL) {
905 scbp_tarlun = (tmp->lun << 8) | (tmp->target);
906 if (scbp_tarlun == tarlun) { /* Unlink this SCB */
913 printk("find busy SCB %p; ", tmp);
918 static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
921 printk("append done SCB %p; ", scbp);
924 scbp->status = SCB_DONE;
926 if (host->last_done != NULL) {
927 host->last_done->next = scbp;
928 host->last_done = scbp;
930 host->first_done = scbp;
931 host->last_done = scbp;
935 struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
937 struct scsi_ctrl_blk *tmp;
939 if ((tmp = host->first_done) != NULL) {
940 if ((host->first_done = tmp->next) == NULL)
941 host->last_done = NULL;
945 printk("find done SCB %p; ",tmp);
950 static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
953 struct scsi_ctrl_blk *tmp, *prev;
955 spin_lock_irqsave(&host->semaph_lock, flags);
957 if ((host->semaph == 0) && (host->active == NULL)) {
958 /* disable Jasmin SCSI Int */
959 outb(0x1F, host->addr + TUL_Mask);
960 spin_unlock_irqrestore(&host->semaph_lock, flags);
961 /* FIXME: synchronize_irq needed ? */
963 spin_lock_irqsave(&host->semaph_lock, flags);
965 outb(0x0F, host->addr + TUL_Mask);
966 spin_unlock_irqrestore(&host->semaph_lock, flags);
967 return SCSI_ABORT_SNOOZE;
969 prev = tmp = host->first_pending; /* Check Pend queue */
970 while (tmp != NULL) {
972 if (tmp->srb == srbp) {
973 if (tmp == host->active) {
974 spin_unlock_irqrestore(&host->semaph_lock, flags);
975 return SCSI_ABORT_BUSY;
976 } else if (tmp == host->first_pending) {
977 if ((host->first_pending = tmp->next) == NULL)
978 host->last_pending = NULL;
980 prev->next = tmp->next;
981 if (tmp == host->last_pending)
982 host->last_pending = prev;
984 tmp->hastat = HOST_ABORTED;
985 tmp->flags |= SCF_DONE;
986 if (tmp->flags & SCF_POST)
987 (*tmp->post) ((u8 *) host, (u8 *) tmp);
988 spin_unlock_irqrestore(&host->semaph_lock, flags);
989 return SCSI_ABORT_SUCCESS;
995 prev = tmp = host->first_busy; /* Check Busy queue */
996 while (tmp != NULL) {
997 if (tmp->srb == srbp) {
998 if (tmp == host->active) {
999 spin_unlock_irqrestore(&host->semaph_lock, flags);
1000 return SCSI_ABORT_BUSY;
1001 } else if (tmp->tagmsg == 0) {
1002 spin_unlock_irqrestore(&host->semaph_lock, flags);
1003 return SCSI_ABORT_BUSY;
1005 host->act_tags[tmp->target]--;
1006 if (tmp == host->first_busy) {
1007 if ((host->first_busy = tmp->next) == NULL)
1008 host->last_busy = NULL;
1010 prev->next = tmp->next;
1011 if (tmp == host->last_busy)
1012 host->last_busy = prev;
1017 tmp->hastat = HOST_ABORTED;
1018 tmp->flags |= SCF_DONE;
1019 if (tmp->flags & SCF_POST)
1020 (*tmp->post) ((u8 *) host, (u8 *) tmp);
1021 spin_unlock_irqrestore(&host->semaph_lock, flags);
1022 return SCSI_ABORT_SUCCESS;
1028 spin_unlock_irqrestore(&host->semaph_lock, flags);
1029 return SCSI_ABORT_NOT_RUNNING;
1032 /***************************************************************************/
1033 static int initio_bad_seq(struct initio_host * host)
1035 struct scsi_ctrl_blk *scb;
1037 printk("initio_bad_seg c=%d\n", host->index);
1039 if ((scb = host->active) != NULL) {
1040 initio_unlink_busy_scb(host, scb);
1041 scb->hastat = HOST_BAD_PHAS;
1043 initio_append_done_scb(host, scb);
1045 initio_stop_bm(host);
1046 initio_reset_scsi(host, 8); /* 7/29/98 */
1047 return initio_post_scsi_rst(host);
1051 /************************************************************************/
1052 static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
1054 unsigned long flags;
1059 scb->sgmax = scb->sglen;
1061 spin_lock_irqsave(&host->semaph_lock, flags);
1063 initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
1065 /* VVVVV 07/21/98 */
1066 if (host->semaph == 1) {
1067 /* Disable Jasmin SCSI Int */
1068 outb(0x1F, host->addr + TUL_Mask);
1070 spin_unlock_irqrestore(&host->semaph_lock, flags);
1074 spin_lock_irqsave(&host->semaph_lock, flags);
1076 outb(0x0F, host->addr + TUL_Mask);
1078 spin_unlock_irqrestore(&host->semaph_lock, flags);
1082 /***************************************************************************/
1083 static int initio_isr(struct initio_host * host)
1085 if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
1086 if (host->semaph == 1) {
1087 outb(0x1F, host->addr + TUL_Mask);
1088 /* Disable Tulip SCSI Int */
1094 outb(0x0F, host->addr + TUL_Mask);
1101 static int tulip_main(struct initio_host * host)
1103 struct scsi_ctrl_blk *scb;
1106 tulip_scsi(host); /* Call tulip_scsi */
1108 /* Walk the list of completed SCBs */
1109 while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
1110 if (scb->tastat == INI_QUEUE_FULL) {
1111 host->max_tags[scb->target] =
1112 host->act_tags[scb->target] - 1;
1114 initio_append_pend_scb(host, scb);
1117 if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
1118 if (scb->tastat == 2) {
1120 /* clr sync. nego flag */
1122 if (scb->flags & SCF_SENSE) {
1124 len = scb->senselen;
1127 scb->buflen = scb->senselen;
1128 scb->bufptr = scb->senseptr;
1129 scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
1130 /* so, we won't report wrong direction in xfer_data_in,
1131 and won't report HOST_DO_DU in state_6 */
1132 scb->mode = SCM_RSENS;
1133 scb->ident &= 0xBF; /* Disable Disconnect */
1137 scb->cdb[0] = SCSICMD_RequestSense;
1143 initio_push_pend_scb(host, scb);
1147 } else { /* in request sense mode */
1149 if (scb->tastat == 2) { /* check contition status again after sending
1150 requset sense cmd 0x3 */
1151 scb->hastat = HOST_BAD_PHAS;
1155 scb->flags |= SCF_DONE;
1156 if (scb->flags & SCF_POST) {
1157 /* FIXME: only one post method and lose casts */
1158 (*scb->post) ((u8 *) host, (u8 *) scb);
1162 if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
1164 if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
1165 return 1; /* return to OS, enable interrupt */
1166 /* Check pending SCB */
1167 if (initio_find_first_pend_scb(host) == NULL)
1168 return 1; /* return to OS, enable interrupt */
1169 } /* End of for loop */
1170 /* statement won't reach here */
1173 static void tulip_scsi(struct initio_host * host)
1175 struct scsi_ctrl_blk *scb;
1176 struct target_control *active_tc;
1178 /* make sure to service interrupt asap */
1179 if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
1180 host->phase = host->jsstatus0 & TSS_PH_MASK;
1181 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
1182 host->jsint = inb(host->addr + TUL_SInt);
1183 if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
1184 int_initio_scsi_rst(host);
1187 if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
1188 if (int_initio_resel(host) == 0)
1189 initio_next_state(host);
1192 if (host->jsint & TSS_SEL_TIMEOUT) {
1193 int_initio_busfree(host);
1196 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
1197 int_initio_busfree(host); /* unexpected bus free or sel timeout */
1200 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
1201 if ((scb = host->active) != NULL)
1202 initio_next_state(host);
1206 if (host->active != NULL)
1209 if ((scb = initio_find_first_pend_scb(host)) == NULL)
1212 /* program HBA's SCSI ID & target SCSI ID */
1213 outb((host->scsi_id << 4) | (scb->target & 0x0F),
1214 host->addr + TUL_SScsiId);
1215 if (scb->opcode == ExecSCSI) {
1216 active_tc = &host->targets[scb->target];
1219 active_tc->drv_flags |= TCF_DRV_EN_TAG;
1221 active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
1223 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1224 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
1225 initio_select_atn_stop(host, scb);
1227 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
1228 initio_select_atn_stop(host, scb);
1231 initio_select_atn3(host, scb);
1233 initio_select_atn(host, scb);
1236 if (scb->flags & SCF_POLL) {
1237 while (wait_tulip(host) != -1) {
1238 if (initio_next_state(host) == -1)
1242 } else if (scb->opcode == BusDevRst) {
1243 initio_select_atn_stop(host, scb);
1244 scb->next_state = 8;
1245 if (scb->flags & SCF_POLL) {
1246 while (wait_tulip(host) != -1) {
1247 if (initio_next_state(host) == -1)
1251 } else if (scb->opcode == AbortCmd) {
1252 if (initio_abort_srb(host, scb->srb) != 0) {
1253 initio_unlink_pend_scb(host, scb);
1254 initio_release_scb(host, scb);
1256 scb->opcode = BusDevRst;
1257 initio_select_atn_stop(host, scb);
1258 scb->next_state = 8;
1261 initio_unlink_pend_scb(host, scb);
1262 scb->hastat = 0x16; /* bad command */
1263 initio_append_done_scb(host, scb);
1269 * initio_next_state - Next SCSI state
1270 * @host: InitIO host we are processing
1272 * Progress the active command block along the state machine
1273 * until we hit a state which we must wait for activity to occur.
1275 * Returns zero or a negative code.
1278 static int initio_next_state(struct initio_host * host)
1282 next = host->active->next_state;
1286 next = initio_state_1(host);
1289 next = initio_state_2(host);
1292 next = initio_state_3(host);
1295 next = initio_state_4(host);
1298 next = initio_state_5(host);
1301 next = initio_state_6(host);
1304 next = initio_state_7(host);
1307 return initio_bus_device_reset(host);
1309 return initio_bad_seq(host);
1318 * initio_state_1 - SCSI state machine
1319 * @host: InitIO host we are controlling
1321 * Perform SCSI state processing for Select/Attention/Stop
1324 static int initio_state_1(struct initio_host * host)
1326 struct scsi_ctrl_blk *scb = host->active;
1327 struct target_control *active_tc = host->active_tc;
1332 /* Move the SCB from pending to busy */
1333 initio_unlink_pend_scb(host, scb);
1334 initio_append_busy_scb(host, scb);
1336 outb(active_tc->sconfig0, host->addr + TUL_SConfig );
1338 if (host->phase == MSG_OUT) {
1339 outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1340 outb(scb->ident, host->addr + TUL_SFifo);
1343 outb(scb->tagmsg, host->addr + TUL_SFifo);
1344 outb(scb->tagid, host->addr + TUL_SFifo);
1346 if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
1347 active_tc->flags |= TCF_WDTR_DONE;
1348 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1349 outb(2, host->addr + TUL_SFifo); /* Extended msg length */
1350 outb(3, host->addr + TUL_SFifo); /* Sync request */
1351 outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
1352 } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
1353 active_tc->flags |= TCF_SYNC_DONE;
1354 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1355 outb(3, host->addr + TUL_SFifo); /* extended msg length */
1356 outb(1, host->addr + TUL_SFifo); /* sync request */
1357 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1358 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1360 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1361 if (wait_tulip(host) == -1)
1364 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1365 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1366 /* Into before CDB xfer */
1372 * initio_state_2 - SCSI state machine
1373 * @host: InitIO host we are controlling
1375 * state after selection with attention
1376 * state after selection with attention3
1379 static int initio_state_2(struct initio_host * host)
1381 struct scsi_ctrl_blk *scb = host->active;
1382 struct target_control *active_tc = host->active_tc;
1387 initio_unlink_pend_scb(host, scb);
1388 initio_append_busy_scb(host, scb);
1390 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1392 if (host->jsstatus1 & TSS_CMD_PH_CMP)
1395 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1396 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
1397 /* Into before CDB xfer */
1402 * initio_state_3 - SCSI state machine
1403 * @host: InitIO host we are controlling
1405 * state before CDB xfer is done
1408 static int initio_state_3(struct initio_host * host)
1410 struct scsi_ctrl_blk *scb = host->active;
1411 struct target_control *active_tc = host->active_tc;
1418 switch (host->phase) {
1419 case CMD_OUT: /* Command out phase */
1420 for (i = 0; i < (int) scb->cdblen; i++)
1421 outb(scb->cdb[i], host->addr + TUL_SFifo);
1422 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1423 if (wait_tulip(host) == -1)
1425 if (host->phase == CMD_OUT)
1426 return initio_bad_seq(host);
1429 case MSG_IN: /* Message in phase */
1430 scb->next_state = 3;
1431 if (initio_msgin(host) == -1)
1435 case STATUS_IN: /* Status phase */
1436 if (initio_status_msg(host) == -1)
1440 case MSG_OUT: /* Message out phase */
1441 if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
1442 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1443 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1444 if (wait_tulip(host) == -1)
1447 active_tc->flags |= TCF_SYNC_DONE;
1449 outb(MSG_EXTEND, host->addr + TUL_SFifo);
1450 outb(3, host->addr + TUL_SFifo); /* ext. msg len */
1451 outb(1, host->addr + TUL_SFifo); /* sync request */
1452 outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
1453 outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
1454 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1455 if (wait_tulip(host) == -1)
1457 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1458 outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
1463 return initio_bad_seq(host);
1469 * initio_state_4 - SCSI state machine
1470 * @host: InitIO host we are controlling
1472 * SCSI state machine. State 4
1475 static int initio_state_4(struct initio_host * host)
1477 struct scsi_ctrl_blk *scb = host->active;
1482 if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
1483 return 6; /* Go to state 6 (After data) */
1486 if (scb->buflen == 0)
1489 switch (host->phase) {
1491 case STATUS_IN: /* Status phase */
1492 if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
1493 scb->hastat = HOST_DO_DU;
1494 if ((initio_status_msg(host)) == -1)
1498 case MSG_IN: /* Message in phase */
1499 scb->next_state = 0x4;
1500 if (initio_msgin(host) == -1)
1504 case MSG_OUT: /* Message out phase */
1505 if (host->jsstatus0 & TSS_PAR_ERROR) {
1507 scb->hastat = HOST_DO_DU;
1508 if (initio_msgout_ide(host) == -1)
1512 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1513 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1514 if (wait_tulip(host) == -1)
1519 case DATA_IN: /* Data in phase */
1520 return initio_xfer_data_in(host);
1522 case DATA_OUT: /* Data out phase */
1523 return initio_xfer_data_out(host);
1526 return initio_bad_seq(host);
1533 * initio_state_5 - SCSI state machine
1534 * @host: InitIO host we are controlling
1536 * State after dma xfer done or phase change before xfer done
1539 static int initio_state_5(struct initio_host * host)
1541 struct scsi_ctrl_blk *scb = host->active;
1542 long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
1547 /*------ get remaining count -------*/
1548 cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
1550 if (inb(host->addr + TUL_XCmd) & 0x20) {
1551 /* ----------------------- DATA_IN ----------------------------- */
1552 /* check scsi parity error */
1553 if (host->jsstatus0 & TSS_PAR_ERROR)
1554 scb->hastat = HOST_DO_DU;
1555 if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
1556 /* tell Hardware scsi xfer has been terminated */
1557 outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
1558 /* wait until DMA xfer not pending */
1559 while (inb(host->addr + TUL_XStatus) & XPEND)
1563 /*-------- DATA OUT -----------*/
1564 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
1565 if (host->active_tc->js_period & TSC_WIDE_SCSI)
1566 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
1568 cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
1570 if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
1571 outb(TAX_X_ABT, host->addr + TUL_XCmd);
1572 /* wait Abort DMA xfer done */
1573 while ((inb(host->addr + TUL_Int) & XABT) == 0)
1576 if ((cnt == 1) && (host->phase == DATA_OUT)) {
1577 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1578 if (wait_tulip(host) == -1)
1582 if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
1583 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1588 return 6; /* After Data */
1590 /* Update active data pointer */
1591 xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
1592 scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
1593 if (scb->flags & SCF_SG) {
1594 struct sg_entry *sgp;
1597 sgp = &scb->sglist[scb->sgidx];
1598 for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
1599 xcnt -= (long) sgp->len;
1600 if (xcnt < 0) { /* this sgp xfer half done */
1601 xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
1602 sgp->data += (u32) xcnt; /* new ptr to be xfer */
1603 sgp->len -= (u32) xcnt; /* new len to be xfer */
1604 scb->bufptr += ((u32) (i - scb->sgidx) << 3);
1605 /* new SG table ptr */
1606 scb->sglen = (u8) (scb->sgmax - i);
1607 /* new SG table len */
1608 scb->sgidx = (u16) i;
1609 /* for next disc and come in this loop */
1610 return 4; /* Go to state 4 */
1612 /* else (xcnt >= 0 , i.e. this sgp already xferred */
1614 return 6; /* Go to state 6 */
1616 scb->bufptr += (u32) xcnt;
1618 return 4; /* Go to state 4 */
1622 * initio_state_6 - SCSI state machine
1623 * @host: InitIO host we are controlling
1625 * State after Data phase
1628 static int initio_state_6(struct initio_host * host)
1630 struct scsi_ctrl_blk *scb = host->active;
1636 switch (host->phase) {
1637 case STATUS_IN: /* Status phase */
1638 if ((initio_status_msg(host)) == -1)
1642 case MSG_IN: /* Message in phase */
1643 scb->next_state = 6;
1644 if ((initio_msgin(host)) == -1)
1648 case MSG_OUT: /* Message out phase */
1649 outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
1650 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1651 if (wait_tulip(host) == -1)
1655 case DATA_IN: /* Data in phase */
1656 return initio_xpad_in(host);
1658 case DATA_OUT: /* Data out phase */
1659 return initio_xpad_out(host);
1662 return initio_bad_seq(host);
1668 * initio_state_7 - SCSI state machine
1669 * @host: InitIO host we are controlling
1673 int initio_state_7(struct initio_host * host)
1680 /* flush SCSI FIFO */
1681 cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
1683 for (i = 0; i < cnt; i++)
1684 inb(host->addr + TUL_SFifo);
1686 switch (host->phase) {
1687 case DATA_IN: /* Data in phase */
1688 case DATA_OUT: /* Data out phase */
1689 return initio_bad_seq(host);
1691 return 6; /* Go to state 6 */
1696 * initio_xfer_data_in - Commence data input
1697 * @host: InitIO host in use
1699 * Commence a block of data transfer. The transfer itself will
1700 * be managed by the controller and we will get a completion (or
1701 * failure) interrupt.
1703 static int initio_xfer_data_in(struct initio_host * host)
1705 struct scsi_ctrl_blk *scb = host->active;
1707 if ((scb->flags & SCF_DIR) == SCF_DOUT)
1708 return 6; /* wrong direction */
1710 outl(scb->buflen, host->addr + TUL_SCnt0);
1711 outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
1713 if (scb->flags & SCF_SG) { /* S/G xfer */
1714 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1715 outl(scb->bufptr, host->addr + TUL_XAddH);
1716 outb(TAX_SG_IN, host->addr + TUL_XCmd);
1718 outl(scb->buflen, host->addr + TUL_XCntH);
1719 outl(scb->bufptr, host->addr + TUL_XAddH);
1720 outb(TAX_X_IN, host->addr + TUL_XCmd);
1722 scb->next_state = 0x5;
1723 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1727 * initio_xfer_data_out - Commence data output
1728 * @host: InitIO host in use
1730 * Commence a block of data transfer. The transfer itself will
1731 * be managed by the controller and we will get a completion (or
1732 * failure) interrupt.
1735 static int initio_xfer_data_out(struct initio_host * host)
1737 struct scsi_ctrl_blk *scb = host->active;
1739 if ((scb->flags & SCF_DIR) == SCF_DIN)
1740 return 6; /* wrong direction */
1742 outl(scb->buflen, host->addr + TUL_SCnt0);
1743 outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
1745 if (scb->flags & SCF_SG) { /* S/G xfer */
1746 outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
1747 outl(scb->bufptr, host->addr + TUL_XAddH);
1748 outb(TAX_SG_OUT, host->addr + TUL_XCmd);
1750 outl(scb->buflen, host->addr + TUL_XCntH);
1751 outl(scb->bufptr, host->addr + TUL_XAddH);
1752 outb(TAX_X_OUT, host->addr + TUL_XCmd);
1755 scb->next_state = 0x5;
1756 return 0; /* return to OS, wait xfer done , let jas_isr come in */
1759 int initio_xpad_in(struct initio_host * host)
1761 struct scsi_ctrl_blk *scb = host->active;
1762 struct target_control *active_tc = host->active_tc;
1764 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1765 scb->hastat = HOST_DO_DU; /* over run */
1767 if (active_tc->js_period & TSC_WIDE_SCSI)
1768 outl(2, host->addr + TUL_SCnt0);
1770 outl(1, host->addr + TUL_SCnt0);
1772 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1773 if (wait_tulip(host) == -1)
1775 if (host->phase != DATA_IN) {
1776 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1779 inb(host->addr + TUL_SFifo);
1783 int initio_xpad_out(struct initio_host * host)
1785 struct scsi_ctrl_blk *scb = host->active;
1786 struct target_control *active_tc = host->active_tc;
1788 if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
1789 scb->hastat = HOST_DO_DU; /* over run */
1791 if (active_tc->js_period & TSC_WIDE_SCSI)
1792 outl(2, host->addr + TUL_SCnt0);
1794 outl(1, host->addr + TUL_SCnt0);
1796 outb(0, host->addr + TUL_SFifo);
1797 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1798 if ((wait_tulip(host)) == -1)
1800 if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
1801 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
1802 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1808 int initio_status_msg(struct initio_host * host)
1809 { /* status & MSG_IN */
1810 struct scsi_ctrl_blk *scb = host->active;
1813 outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
1814 if (wait_tulip(host) == -1)
1818 scb->tastat = inb(host->addr + TUL_SFifo);
1820 if (host->phase == MSG_OUT) {
1821 if (host->jsstatus0 & TSS_PAR_ERROR)
1822 outb(MSG_PARITY, host->addr + TUL_SFifo);
1824 outb(MSG_NOP, host->addr + TUL_SFifo);
1825 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1826 return wait_tulip(host);
1828 if (host->phase == MSG_IN) {
1829 msg = inb(host->addr + TUL_SFifo);
1830 if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
1831 if ((initio_msgin_accept(host)) == -1)
1833 if (host->phase != MSG_OUT)
1834 return initio_bad_seq(host);
1835 outb(MSG_PARITY, host->addr + TUL_SFifo);
1836 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
1837 return wait_tulip(host);
1839 if (msg == 0) { /* Command complete */
1841 if ((scb->tastat & 0x18) == 0x10) /* No link support */
1842 return initio_bad_seq(host);
1843 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1844 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
1845 return initio_wait_done_disc(host);
1848 if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
1849 if ((scb->tastat & 0x18) == 0x10)
1850 return initio_msgin_accept(host);
1853 return initio_bad_seq(host);
1858 int int_initio_busfree(struct initio_host * host)
1860 struct scsi_ctrl_blk *scb = host->active;
1863 if (scb->status & SCB_SELECT) { /* selection timeout */
1864 initio_unlink_pend_scb(host, scb);
1865 scb->hastat = HOST_SEL_TOUT;
1866 initio_append_done_scb(host, scb);
1867 } else { /* Unexpected bus free */
1868 initio_unlink_busy_scb(host, scb);
1869 scb->hastat = HOST_BUS_FREE;
1870 initio_append_done_scb(host, scb);
1872 host->active = NULL;
1873 host->active_tc = NULL;
1875 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
1876 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
1877 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
1883 * int_initio_scsi_rst - SCSI reset occurred
1884 * @host: Host seeing the reset
1886 * A SCSI bus reset has occurred. Clean up any pending transfer
1887 * the hardware is doing by DMA and then abort all active and
1888 * disconnected commands. The mid layer should sort the rest out
1892 static int int_initio_scsi_rst(struct initio_host * host)
1894 struct scsi_ctrl_blk *scb;
1897 /* if DMA xfer is pending, abort DMA xfer */
1898 if (inb(host->addr + TUL_XStatus) & 0x01) {
1899 outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
1900 /* wait Abort DMA xfer done */
1901 while ((inb(host->addr + TUL_Int) & 0x04) == 0)
1903 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
1905 /* Abort all active & disconnected scb */
1906 while ((scb = initio_pop_busy_scb(host)) != NULL) {
1907 scb->hastat = HOST_BAD_PHAS;
1908 initio_append_done_scb(host, scb);
1910 host->active = NULL;
1911 host->active_tc = NULL;
1913 /* clr sync nego. done flag */
1914 for (i = 0; i < host->max_tar; i++)
1915 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
1920 * int_initio_scsi_resel - Reselection occurred
1921 * @host: InitIO host adapter
1923 * A SCSI reselection event has been signalled and the interrupt
1924 * is now being processed. Work out which command block needs attention
1925 * and continue processing that command.
1928 int int_initio_resel(struct initio_host * host)
1930 struct scsi_ctrl_blk *scb;
1931 struct target_control *active_tc;
1935 if ((scb = host->active) != NULL) {
1936 /* FIXME: Why check and not just clear ? */
1937 if (scb->status & SCB_SELECT) /* if waiting for selection complete */
1938 scb->status &= ~SCB_SELECT;
1939 host->active = NULL;
1941 /* --------- get target id---------------------- */
1942 tar = inb(host->addr + TUL_SBusId);
1943 /* ------ get LUN from Identify message----------- */
1944 lun = inb(host->addr + TUL_SIdent) & 0x0F;
1945 /* 07/22/98 from 0x1F -> 0x0F */
1946 active_tc = &host->targets[tar];
1947 host->active_tc = active_tc;
1948 outb(active_tc->sconfig0, host->addr + TUL_SConfig);
1949 outb(active_tc->js_period, host->addr + TUL_SPeriod);
1951 /* ------------- tag queueing ? ------------------- */
1952 if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
1953 if ((initio_msgin_accept(host)) == -1)
1955 if (host->phase != MSG_IN)
1957 outl(1, host->addr + TUL_SCnt0);
1958 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1959 if (wait_tulip(host) == -1)
1961 msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
1963 if (msg < MSG_STAG || msg > MSG_OTAG) /* Is simple Tag */
1966 if (initio_msgin_accept(host) == -1)
1969 if (host->phase != MSG_IN)
1972 outl(1, host->addr + TUL_SCnt0);
1973 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
1974 if (wait_tulip(host) == -1)
1976 tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
1977 scb = host->scb + tag;
1978 if (scb->target != tar || scb->lun != lun) {
1979 return initio_msgout_abort_tag(host);
1981 if (scb->status != SCB_BUSY) { /* 03/24/95 */
1982 return initio_msgout_abort_tag(host);
1985 if ((initio_msgin_accept(host)) == -1)
1987 } else { /* No tag */
1989 if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
1990 return initio_msgout_abort_targ(host);
1993 if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
1994 if ((initio_msgin_accept(host)) == -1)
2002 * int_initio_bad_seq - out of phase
2003 * @host: InitIO host flagging event
2005 * We have ended up out of phase somehow. Reset the host controller
2006 * and throw all our toys out of the pram. Let the midlayer clean up
2009 static int int_initio_bad_seq(struct initio_host * host)
2010 { /* target wrong phase */
2011 struct scsi_ctrl_blk *scb;
2014 initio_reset_scsi(host, 10);
2016 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2017 scb->hastat = HOST_BAD_PHAS;
2018 initio_append_done_scb(host, scb);
2020 for (i = 0; i < host->max_tar; i++)
2021 host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2027 * initio_msgout_abort_targ - abort a tag
2028 * @host: InitIO host
2030 * Abort when the target/lun does not match or when our SCB is not
2031 * busy. Used by untagged commands.
2034 static int initio_msgout_abort_targ(struct initio_host * host)
2037 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2038 if (initio_msgin_accept(host) == -1)
2040 if (host->phase != MSG_OUT)
2041 return initio_bad_seq(host);
2043 outb(MSG_ABORT, host->addr + TUL_SFifo);
2044 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2046 return initio_wait_disc(host);
2050 * initio_msgout_abort_tag - abort a tag
2051 * @host: InitIO host
2053 * Abort when the target/lun does not match or when our SCB is not
2054 * busy. Used for tagged commands.
2057 static int initio_msgout_abort_tag(struct initio_host * host)
2060 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2061 if (initio_msgin_accept(host) == -1)
2063 if (host->phase != MSG_OUT)
2064 return initio_bad_seq(host);
2066 outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
2067 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2069 return initio_wait_disc(host);
2074 * initio_msgin - Message in
2075 * @host: InitIO Host
2077 * Process incoming message
2079 static int initio_msgin(struct initio_host * host)
2081 struct target_control *active_tc;
2084 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2086 outl(1, host->addr + TUL_SCnt0);
2087 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2088 if (wait_tulip(host) == -1)
2091 switch (inb(host->addr + TUL_SFifo)) {
2092 case MSG_DISC: /* Disconnect msg */
2093 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2094 return initio_wait_disc(host);
2098 initio_msgin_accept(host);
2100 case MSG_REJ: /* Clear ATN first */
2101 outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
2102 host->addr + TUL_SSignal);
2103 active_tc = host->active_tc;
2104 if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
2105 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
2106 host->addr + TUL_SSignal);
2107 initio_msgin_accept(host);
2109 case MSG_EXTEND: /* extended msg */
2110 initio_msgin_extend(host);
2112 case MSG_IGNOREWIDE:
2113 initio_msgin_accept(host);
2116 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2117 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2118 return initio_wait_done_disc(host);
2120 initio_msgout_reject(host);
2123 if (host->phase != MSG_IN)
2126 /* statement won't reach here */
2129 static int initio_msgout_reject(struct initio_host * host)
2131 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2133 if (initio_msgin_accept(host) == -1)
2136 if (host->phase == MSG_OUT) {
2137 outb(MSG_REJ, host->addr + TUL_SFifo); /* Msg reject */
2138 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2139 return wait_tulip(host);
2144 static int initio_msgout_ide(struct initio_host * host)
2146 outb(MSG_IDE, host->addr + TUL_SFifo); /* Initiator Detected Error */
2147 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2148 return wait_tulip(host);
2151 static int initio_msgin_extend(struct initio_host * host)
2155 if (initio_msgin_accept(host) != MSG_IN)
2158 /* Get extended msg length */
2159 outl(1, host->addr + TUL_SCnt0);
2160 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2161 if (wait_tulip(host) == -1)
2164 len = inb(host->addr + TUL_SFifo);
2166 for (idx = 1; len != 0; len--) {
2168 if ((initio_msgin_accept(host)) != MSG_IN)
2170 outl(1, host->addr + TUL_SCnt0);
2171 outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
2172 if (wait_tulip(host) == -1)
2174 host->msg[idx++] = inb(host->addr + TUL_SFifo);
2176 if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
2178 if (host->msg[0] != 3) /* if length is not right */
2179 return initio_msgout_reject(host);
2180 if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
2183 if (initio_msgin_sync(host) == 0 &&
2184 (host->active_tc->flags & TCF_SYNC_DONE)) {
2185 initio_sync_done(host);
2186 return initio_msgin_accept(host);
2190 r = inb(host->addr + TUL_SSignal);
2191 outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
2192 host->addr + TUL_SSignal);
2193 if (initio_msgin_accept(host) != MSG_OUT)
2196 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
2198 initio_sync_done(host);
2200 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2201 outb(3, host->addr + TUL_SFifo);
2202 outb(1, host->addr + TUL_SFifo);
2203 outb(host->msg[2], host->addr + TUL_SFifo);
2204 outb(host->msg[3], host->addr + TUL_SFifo);
2205 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2206 return wait_tulip(host);
2208 if (host->msg[0] != 2 || host->msg[1] != 3)
2209 return initio_msgout_reject(host);
2210 /* if it's WIDE DATA XFER REQ */
2211 if (host->active_tc->flags & TCF_NO_WDTR) {
2214 if (host->msg[2] > 2) /* > 32 bits */
2215 return initio_msgout_reject(host);
2216 if (host->msg[2] == 2) { /* == 32 */
2219 if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
2221 if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
2222 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2223 return initio_msgin_accept(host);
2227 outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
2229 if (initio_msgin_accept(host) != MSG_OUT)
2232 outb(MSG_EXTEND, host->addr + TUL_SFifo);
2233 outb(2, host->addr + TUL_SFifo);
2234 outb(3, host->addr + TUL_SFifo);
2235 outb(host->msg[2], host->addr + TUL_SFifo);
2236 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2237 return wait_tulip(host);
2240 static int initio_msgin_sync(struct initio_host * host)
2242 char default_period;
2244 default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
2245 if (host->msg[3] > MAX_OFFSET) {
2246 host->msg[3] = MAX_OFFSET;
2247 if (host->msg[2] < default_period) {
2248 host->msg[2] = default_period;
2251 if (host->msg[2] >= 59) /* Change to async */
2255 /* offset requests asynchronous transfers ? */
2256 if (host->msg[3] == 0) {
2259 if (host->msg[2] < default_period) {
2260 host->msg[2] = default_period;
2263 if (host->msg[2] >= 59) {
2270 static int wdtr_done(struct initio_host * host)
2272 host->active_tc->flags &= ~TCF_SYNC_DONE;
2273 host->active_tc->flags |= TCF_WDTR_DONE;
2275 host->active_tc->js_period = 0;
2276 if (host->msg[2]) /* if 16 bit */
2277 host->active_tc->js_period |= TSC_WIDE_SCSI;
2278 host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
2279 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2280 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2285 static int initio_sync_done(struct initio_host * host)
2289 host->active_tc->flags |= TCF_SYNC_DONE;
2292 host->active_tc->js_period |= host->msg[3];
2293 for (i = 0; i < 8; i++) {
2294 if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
2297 host->active_tc->js_period |= (i << 4);
2298 host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
2300 outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
2301 outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
2307 static int initio_post_scsi_rst(struct initio_host * host)
2309 struct scsi_ctrl_blk *scb;
2310 struct target_control *active_tc;
2313 host->active = NULL;
2314 host->active_tc = NULL;
2317 while ((scb = initio_pop_busy_scb(host)) != NULL) {
2318 scb->hastat = HOST_BAD_PHAS;
2319 initio_append_done_scb(host, scb);
2321 /* clear sync done flag */
2322 active_tc = &host->targets[0];
2323 for (i = 0; i < host->max_tar; active_tc++, i++) {
2324 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
2325 /* Initialize the sync. xfer register values to an asyn xfer */
2326 active_tc->js_period = 0;
2327 active_tc->sconfig0 = host->sconf1;
2328 host->act_tags[0] = 0; /* 07/22/98 */
2329 host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
2335 static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
2337 scb->status |= SCB_SELECT;
2338 scb->next_state = 0x1;
2340 host->active_tc = &host->targets[scb->target];
2341 outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
2345 static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
2349 scb->status |= SCB_SELECT;
2350 scb->next_state = 0x2;
2352 outb(scb->ident, host->addr + TUL_SFifo);
2353 for (i = 0; i < (int) scb->cdblen; i++)
2354 outb(scb->cdb[i], host->addr + TUL_SFifo);
2355 host->active_tc = &host->targets[scb->target];
2357 outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
2360 static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
2364 scb->status |= SCB_SELECT;
2365 scb->next_state = 0x2;
2367 outb(scb->ident, host->addr + TUL_SFifo);
2368 outb(scb->tagmsg, host->addr + TUL_SFifo);
2369 outb(scb->tagid, host->addr + TUL_SFifo);
2370 for (i = 0; i < scb->cdblen; i++)
2371 outb(scb->cdb[i], host->addr + TUL_SFifo);
2372 host->active_tc = &host->targets[scb->target];
2374 outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
2378 * initio_bus_device_reset - SCSI Bus Device Reset
2379 * @host: InitIO host to reset
2381 * Perform a device reset and abort all pending SCBs for the
2384 int initio_bus_device_reset(struct initio_host * host)
2386 struct scsi_ctrl_blk *scb = host->active;
2387 struct target_control *active_tc = host->active_tc;
2388 struct scsi_ctrl_blk *tmp, *prev;
2391 if (host->phase != MSG_OUT)
2392 return int_initio_bad_seq(host); /* Unexpected phase */
2394 initio_unlink_pend_scb(host, scb);
2395 initio_release_scb(host, scb);
2398 tar = scb->target; /* target */
2399 active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
2400 /* clr sync. nego & WDTR flags 07/22/98 */
2402 /* abort all SCB with same target */
2403 prev = tmp = host->first_busy; /* Check Busy queue */
2404 while (tmp != NULL) {
2405 if (tmp->target == tar) {
2407 if (tmp == host->first_busy) {
2408 if ((host->first_busy = tmp->next) == NULL)
2409 host->last_busy = NULL;
2411 prev->next = tmp->next;
2412 if (tmp == host->last_busy)
2413 host->last_busy = prev;
2415 tmp->hastat = HOST_ABORTED;
2416 initio_append_done_scb(host, tmp);
2418 /* Previous haven't change */
2424 outb(MSG_DEVRST, host->addr + TUL_SFifo);
2425 outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
2426 return initio_wait_disc(host);
2430 static int initio_msgin_accept(struct initio_host * host)
2432 outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
2433 return wait_tulip(host);
2436 static int wait_tulip(struct initio_host * host)
2439 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2443 host->jsint = inb(host->addr + TUL_SInt);
2444 host->phase = host->jsstatus0 & TSS_PH_MASK;
2445 host->jsstatus1 = inb(host->addr + TUL_SStatus1);
2447 if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
2448 return int_initio_resel(host);
2449 if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
2450 return int_initio_busfree(host);
2451 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2452 return int_initio_scsi_rst(host);
2454 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2455 if (host->flags & HCF_EXPECT_DONE_DISC) {
2456 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2457 initio_unlink_busy_scb(host, host->active);
2458 host->active->hastat = 0;
2459 initio_append_done_scb(host, host->active);
2460 host->active = NULL;
2461 host->active_tc = NULL;
2462 host->flags &= ~HCF_EXPECT_DONE_DISC;
2463 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2464 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2467 if (host->flags & HCF_EXPECT_DISC) {
2468 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2469 host->active = NULL;
2470 host->active_tc = NULL;
2471 host->flags &= ~HCF_EXPECT_DISC;
2472 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2473 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2476 return int_initio_busfree(host);
2478 /* The old code really does the below. Can probably be removed */
2479 if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
2484 static int initio_wait_disc(struct initio_host * host)
2486 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
2489 host->jsint = inb(host->addr + TUL_SInt);
2491 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2492 return int_initio_scsi_rst(host);
2493 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2494 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2495 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2496 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2497 host->active = NULL;
2500 return initio_bad_seq(host);
2503 static int initio_wait_done_disc(struct initio_host * host)
2505 while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
2509 host->jsint = inb(host->addr + TUL_SInt);
2511 if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
2512 return int_initio_scsi_rst(host);
2513 if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
2514 outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
2515 outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
2516 outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
2517 initio_unlink_busy_scb(host, host->active);
2519 initio_append_done_scb(host, host->active);
2520 host->active = NULL;
2523 return initio_bad_seq(host);
2527 * i91u_intr - IRQ handler
2528 * @irqno: IRQ number
2529 * @dev_id: IRQ identifier
2531 * Take the relevant locks and then invoke the actual isr processing
2532 * code under the lock.
2535 static irqreturn_t i91u_intr(int irqno, void *dev_id)
2537 struct Scsi_Host *dev = dev_id;
2538 unsigned long flags;
2541 spin_lock_irqsave(dev->host_lock, flags);
2542 r = initio_isr((struct initio_host *)dev->hostdata);
2543 spin_unlock_irqrestore(dev->host_lock, flags);
2552 * initio_build_scb - Build the mappings and SCB
2553 * @host: InitIO host taking the command
2554 * @cblk: Firmware command block
2555 * @cmnd: SCSI midlayer command block
2557 * Translate the abstract SCSI command into a firmware command block
2558 * suitable for feeding to the InitIO host controller. This also requires
2559 * we build the scatter gather lists and ensure they are mapped properly.
2562 static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
2563 { /* Create corresponding SCB */
2564 struct scatterlist *sglist;
2565 struct sg_entry *sg; /* Pointer to SG list */
2568 dma_addr_t dma_addr;
2570 /* Fill in the command headers */
2571 cblk->post = i91uSCBPost; /* i91u's callback routine */
2573 cblk->opcode = ExecSCSI;
2574 cblk->flags = SCF_POST; /* After SCSI done, call post routine */
2575 cblk->target = cmnd->device->id;
2576 cblk->lun = cmnd->device->lun;
2577 cblk->ident = cmnd->device->lun | DISC_ALLOW;
2579 cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
2581 /* Map the sense buffer into bus memory */
2582 dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
2583 SENSE_SIZE, DMA_FROM_DEVICE);
2584 cblk->senseptr = (u32)dma_addr;
2585 cblk->senselen = SENSE_SIZE;
2586 cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
2587 cblk->cdblen = cmnd->cmd_len;
2589 /* Clear the returned status */
2592 /* Command the command */
2593 memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
2596 if (cmnd->device->tagged_supported) { /* Tag Support */
2597 cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
2599 cblk->tagmsg = 0; /* No tag support */
2602 /* todo handle map_sg error */
2603 nseg = scsi_dma_map(cmnd);
2606 dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
2607 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2609 cblk->bufptr = (u32)dma_addr;
2610 cmnd->SCp.dma_handle = dma_addr;
2614 cblk->flags |= SCF_SG; /* Turn on SG list flag */
2616 sg = &cblk->sglist[0];
2617 scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
2618 sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
2619 sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
2620 total_len += sg_dma_len(sglist);
2624 cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
2625 total_len : scsi_bufflen(cmnd);
2626 } else { /* No data transfer required */
2633 * i91u_queuecommand - Queue a new command if possible
2634 * @cmd: SCSI command block from the mid layer
2635 * @done: Completion handler
2637 * Attempts to queue a new command with the host adapter. Will return
2638 * zero if successful or indicate a host busy condition if not (which
2639 * will cause the mid layer to call us again later with the command)
2642 static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
2643 void (*done)(struct scsi_cmnd *))
2645 struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
2646 struct scsi_ctrl_blk *cmnd;
2648 cmd->scsi_done = done;
2650 cmnd = initio_alloc_scb(host);
2652 return SCSI_MLQUEUE_HOST_BUSY;
2654 initio_build_scb(host, cmnd, cmd);
2655 initio_exec_scb(host, cmnd);
2659 static DEF_SCSI_QCMD(i91u_queuecommand)
2662 * i91u_bus_reset - reset the SCSI bus
2663 * @cmnd: Command block we want to trigger the reset for
2665 * Initiate a SCSI bus reset sequence
2668 static int i91u_bus_reset(struct scsi_cmnd * cmnd)
2670 struct initio_host *host;
2672 host = (struct initio_host *) cmnd->device->host->hostdata;
2674 spin_lock_irq(cmnd->device->host->host_lock);
2675 initio_reset_scsi(host, 0);
2676 spin_unlock_irq(cmnd->device->host->host_lock);
2682 * i91u_biospararm - return the "logical geometry
2683 * @sdev: SCSI device
2684 * @dev; Matching block device
2685 * @capacity: Sector size of drive
2686 * @info_array: Return space for BIOS geometry
2688 * Map the device geometry in a manner compatible with the host
2689 * controller BIOS behaviour.
2691 * FIXME: limited to 2^32 sector devices.
2694 static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
2695 sector_t capacity, int *info_array)
2697 struct initio_host *host; /* Point to Host adapter control block */
2698 struct target_control *tc;
2700 host = (struct initio_host *) sdev->host->hostdata;
2701 tc = &host->targets[sdev->id];
2704 info_array[0] = tc->heads;
2705 info_array[1] = tc->sectors;
2706 info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
2708 if (tc->drv_flags & TCF_DRV_255_63) {
2709 info_array[0] = 255;
2711 info_array[2] = (unsigned long)capacity / 255 / 63;
2715 info_array[2] = (unsigned long)capacity >> 11;
2719 #if defined(DEBUG_BIOSPARAM)
2720 if (i91u_debug & debug_biosparam) {
2721 printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
2722 info_array[0], info_array[1], info_array[2]);
2723 printk("WARNING: check, if the bios geometry is correct.\n");
2731 * i91u_unmap_scb - Unmap a command
2732 * @pci_dev: PCI device the command is for
2733 * @cmnd: The command itself
2735 * Unmap any PCI mapping/IOMMU resources allocated when the command
2736 * was mapped originally as part of initio_build_scb
2739 static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
2741 /* auto sense buffer */
2742 if (cmnd->SCp.ptr) {
2743 dma_unmap_single(&pci_dev->dev,
2744 (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
2745 SENSE_SIZE, DMA_FROM_DEVICE);
2746 cmnd->SCp.ptr = NULL;
2749 /* request buffer */
2750 if (scsi_sg_count(cmnd)) {
2751 dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
2752 sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
2755 scsi_dma_unmap(cmnd);
2760 * i91uSCBPost - SCSI callback
2761 * @host: Pointer to host adapter control block.
2762 * @cmnd: Pointer to SCSI control block.
2764 * This is callback routine be called when tulip finish one
2768 static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
2770 struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
2771 struct initio_host *host;
2772 struct scsi_ctrl_blk *cblk;
2774 host = (struct initio_host *) host_mem;
2775 cblk = (struct scsi_ctrl_blk *) cblk_mem;
2776 if ((cmnd = cblk->srb) == NULL) {
2777 printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
2779 initio_release_scb(host, cblk); /* Release SCB for current channel */
2784 * Remap the firmware error status into a mid layer one
2786 switch (cblk->hastat) {
2788 case 0xa: /* Linked command complete without error and linked normally */
2789 case 0xb: /* Linked command complete without error interrupt generated */
2793 case 0x11: /* Selection time out-The initiator selection or target
2794 reselection was not complete within the SCSI Time out period */
2795 cblk->hastat = DID_TIME_OUT;
2798 case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
2799 phase sequence was requested by the target. The host adapter
2800 will generate a SCSI Reset Condition, notifying the host with
2802 cblk->hastat = DID_RESET;
2805 case 0x1a: /* SCB Aborted. 07/21/98 */
2806 cblk->hastat = DID_ABORT;
2809 case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
2810 than was allocated by the Data Length field or the sum of the
2811 Scatter / Gather Data Length fields. */
2812 case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
2813 case 0x16: /* Invalid SCB Operation Code. */
2816 printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
2817 cblk->hastat = DID_ERROR; /* Couldn't find any better */
2821 cmnd->result = cblk->tastat | (cblk->hastat << 16);
2822 i91u_unmap_scb(host->pci_dev, cmnd);
2823 cmnd->scsi_done(cmnd); /* Notify system DONE */
2824 initio_release_scb(host, cblk); /* Release SCB for current channel */
2827 static struct scsi_host_template initio_template = {
2828 .proc_name = "INI9100U",
2829 .name = "Initio INI-9X00U/UW SCSI device driver",
2830 .queuecommand = i91u_queuecommand,
2831 .eh_bus_reset_handler = i91u_bus_reset,
2832 .bios_param = i91u_biosparam,
2833 .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
2835 .sg_tablesize = SG_ALL,
2837 .use_clustering = ENABLE_CLUSTERING,
2840 static int initio_probe_one(struct pci_dev *pdev,
2841 const struct pci_device_id *id)
2843 struct Scsi_Host *shost;
2844 struct initio_host *host;
2847 struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
2848 int num_scb, i, error;
2850 error = pci_enable_device(pdev);
2854 pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
2855 bios_seg = (u16) (reg & 0xFF);
2856 if (((reg & 0xFF00) >> 8) == 0xFF)
2858 bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
2860 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
2861 printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
2863 goto out_disable_device;
2865 shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
2867 printk(KERN_WARNING "initio: Could not allocate host structure.\n");
2869 goto out_disable_device;
2871 host = (struct initio_host *)shost->hostdata;
2872 memset(host, 0, sizeof(struct initio_host));
2873 host->addr = pci_resource_start(pdev, 0);
2874 host->bios_addr = bios_seg;
2876 if (!request_region(host->addr, 256, "i91u")) {
2877 printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
2882 if (initio_tag_enable) /* 1.01i */
2883 num_scb = MAX_TARGETS * i91u_MAXQUEUE;
2885 num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
2887 for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
2888 i = num_scb * sizeof(struct scsi_ctrl_blk);
2889 if ((scb = kzalloc(i, GFP_DMA)) != NULL)
2894 printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
2896 goto out_release_region;
2899 host->pci_dev = pdev;
2902 spin_lock_init(&host->semaph_lock);
2903 host->num_scbs = num_scb;
2905 host->next_pending = scb;
2906 host->next_avail = scb;
2907 for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
2914 host->scb_end = tmp;
2915 host->first_avail = scb;
2916 host->last_avail = prev;
2917 spin_lock_init(&host->avail_lock);
2919 initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
2921 host->jsstatus0 = 0;
2923 shost->io_port = host->addr;
2924 shost->n_io_port = 0xff;
2925 shost->can_queue = num_scb; /* 03/05/98 */
2926 shost->unique_id = host->addr;
2927 shost->max_id = host->max_tar;
2928 shost->max_lun = 32; /* 10/21/97 */
2929 shost->irq = pdev->irq;
2930 shost->this_id = host->scsi_id; /* Assign HCS index */
2931 shost->base = host->addr;
2932 shost->sg_tablesize = TOTAL_SG_ENTRY;
2934 error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
2936 printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
2940 pci_set_drvdata(pdev, shost);
2942 error = scsi_add_host(shost, &pdev->dev);
2945 scsi_scan_host(shost);
2948 free_irq(pdev->irq, shost);
2952 release_region(host->addr, 256);
2954 scsi_host_put(shost);
2956 pci_disable_device(pdev);
2961 * initio_remove_one - control shutdown
2962 * @pdev: PCI device being released
2964 * Release the resources assigned to this adapter after it has
2965 * finished being used.
2968 static void initio_remove_one(struct pci_dev *pdev)
2970 struct Scsi_Host *host = pci_get_drvdata(pdev);
2971 struct initio_host *s = (struct initio_host *)host->hostdata;
2972 scsi_remove_host(host);
2973 free_irq(pdev->irq, host);
2974 release_region(s->addr, 256);
2975 scsi_host_put(host);
2976 pci_disable_device(pdev);
2979 MODULE_LICENSE("GPL");
2981 static struct pci_device_id initio_pci_tbl[] = {
2982 {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2983 {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2984 {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2985 {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2986 {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
2989 MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
2991 static struct pci_driver initio_pci_driver = {
2993 .id_table = initio_pci_tbl,
2994 .probe = initio_probe_one,
2995 .remove = initio_remove_one,
2998 static int __init initio_init_driver(void)
3000 return pci_register_driver(&initio_pci_driver);
3003 static void __exit initio_exit_driver(void)
3005 pci_unregister_driver(&initio_pci_driver);
3008 MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
3009 MODULE_AUTHOR("Initio Corporation");
3010 MODULE_LICENSE("GPL");
3012 module_init(initio_init_driver);
3013 module_exit(initio_exit_driver);