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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/scsi/initio.c
Initial import
Diffstat (limited to 'drivers/scsi/initio.c')
-rw-r--r--drivers/scsi/initio.c3013
1 files changed, 3013 insertions, 0 deletions
diff --git a/drivers/scsi/initio.c b/drivers/scsi/initio.c
new file mode 100644
index 000000000..e5dae7b54
--- /dev/null
+++ b/drivers/scsi/initio.c
@@ -0,0 +1,3013 @@
+/**************************************************************************
+ * Initio 9100 device driver for Linux.
+ *
+ * Copyright (c) 1994-1998 Initio Corporation
+ * Copyright (c) 1998 Bas Vermeulen <bvermeul@blackstar.xs4all.nl>
+ * Copyright (c) 2004 Christoph Hellwig <hch@lst.de>
+ * Copyright (c) 2007 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *************************************************************************
+ *
+ * DESCRIPTION:
+ *
+ * This is the Linux low-level SCSI driver for Initio INI-9X00U/UW SCSI host
+ * adapters
+ *
+ * 08/06/97 hc - v1.01h
+ * - Support inic-940 and inic-935
+ * 09/26/97 hc - v1.01i
+ * - Make correction from J.W. Schultz suggestion
+ * 10/13/97 hc - Support reset function
+ * 10/21/97 hc - v1.01j
+ * - Support 32 LUN (SCSI 3)
+ * 01/14/98 hc - v1.01k
+ * - Fix memory allocation problem
+ * 03/04/98 hc - v1.01l
+ * - Fix tape rewind which will hang the system problem
+ * - Set can_queue to initio_num_scb
+ * 06/25/98 hc - v1.01m
+ * - Get it work for kernel version >= 2.1.75
+ * - Dynamic assign SCSI bus reset holding time in initio_init()
+ * 07/02/98 hc - v1.01n
+ * - Support 0002134A
+ * 08/07/98 hc - v1.01o
+ * - Change the initio_abort_srb routine to use scsi_done. <01>
+ * 09/07/98 hl - v1.02
+ * - Change the INI9100U define and proc_dir_entry to
+ * reflect the newer Kernel 2.1.118, but the v1.o1o
+ * should work with Kernel 2.1.118.
+ * 09/20/98 wh - v1.02a
+ * - Support Abort command.
+ * - Handle reset routine.
+ * 09/21/98 hl - v1.03
+ * - remove comments.
+ * 12/09/98 bv - v1.03a
+ * - Removed unused code
+ * 12/13/98 bv - v1.03b
+ * - Remove cli() locking for kernels >= 2.1.95. This uses
+ * spinlocks to serialize access to the pSRB_head and
+ * pSRB_tail members of the HCS structure.
+ * 09/01/99 bv - v1.03d
+ * - Fixed a deadlock problem in SMP.
+ * 21/01/99 bv - v1.03e
+ * - Add support for the Domex 3192U PCI SCSI
+ * This is a slightly modified patch by
+ * Brian Macy <bmacy@sunshinecomputing.com>
+ * 22/02/99 bv - v1.03f
+ * - Didn't detect the INIC-950 in 2.0.x correctly.
+ * Now fixed.
+ * 05/07/99 bv - v1.03g
+ * - Changed the assumption that HZ = 100
+ * 10/17/03 mc - v1.04
+ * - added new DMA API support
+ * 06/01/04 jmd - v1.04a
+ * - Re-add reset_bus support
+ **************************************************************************/
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/stat.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/dma-mapping.h>
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+
+#include "initio.h"
+
+#define SENSE_SIZE 14
+
+#define i91u_MAXQUEUE 2
+#define i91u_REVID "Initio INI-9X00U/UW SCSI device driver; Revision: 1.04a"
+
+#define I950_DEVICE_ID 0x9500 /* Initio's inic-950 product ID */
+#define I940_DEVICE_ID 0x9400 /* Initio's inic-940 product ID */
+#define I935_DEVICE_ID 0x9401 /* Initio's inic-935 product ID */
+#define I920_DEVICE_ID 0x0002 /* Initio's other product ID */
+
+#ifdef DEBUG_i91u
+static unsigned int i91u_debug = DEBUG_DEFAULT;
+#endif
+
+static int initio_tag_enable = 1;
+
+#ifdef DEBUG_i91u
+static int setup_debug = 0;
+#endif
+
+static void i91uSCBPost(u8 * pHcb, u8 * pScb);
+
+/* PCI Devices supported by this driver */
+static struct pci_device_id i91u_pci_devices[] = {
+ { PCI_VENDOR_ID_INIT, I950_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_INIT, I940_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_INIT, I935_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_INIT, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { PCI_VENDOR_ID_DOMEX, I920_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ { }
+};
+MODULE_DEVICE_TABLE(pci, i91u_pci_devices);
+
+#define DEBUG_INTERRUPT 0
+#define DEBUG_QUEUE 0
+#define DEBUG_STATE 0
+#define INT_DISC 0
+
+/*--- forward references ---*/
+static struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun);
+static struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host);
+
+static int tulip_main(struct initio_host * host);
+
+static int initio_next_state(struct initio_host * host);
+static int initio_state_1(struct initio_host * host);
+static int initio_state_2(struct initio_host * host);
+static int initio_state_3(struct initio_host * host);
+static int initio_state_4(struct initio_host * host);
+static int initio_state_5(struct initio_host * host);
+static int initio_state_6(struct initio_host * host);
+static int initio_state_7(struct initio_host * host);
+static int initio_xfer_data_in(struct initio_host * host);
+static int initio_xfer_data_out(struct initio_host * host);
+static int initio_xpad_in(struct initio_host * host);
+static int initio_xpad_out(struct initio_host * host);
+static int initio_status_msg(struct initio_host * host);
+
+static int initio_msgin(struct initio_host * host);
+static int initio_msgin_sync(struct initio_host * host);
+static int initio_msgin_accept(struct initio_host * host);
+static int initio_msgout_reject(struct initio_host * host);
+static int initio_msgin_extend(struct initio_host * host);
+
+static int initio_msgout_ide(struct initio_host * host);
+static int initio_msgout_abort_targ(struct initio_host * host);
+static int initio_msgout_abort_tag(struct initio_host * host);
+
+static int initio_bus_device_reset(struct initio_host * host);
+static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb);
+static int int_initio_busfree(struct initio_host * host);
+static int int_initio_scsi_rst(struct initio_host * host);
+static int int_initio_bad_seq(struct initio_host * host);
+static int int_initio_resel(struct initio_host * host);
+static int initio_sync_done(struct initio_host * host);
+static int wdtr_done(struct initio_host * host);
+static int wait_tulip(struct initio_host * host);
+static int initio_wait_done_disc(struct initio_host * host);
+static int initio_wait_disc(struct initio_host * host);
+static void tulip_scsi(struct initio_host * host);
+static int initio_post_scsi_rst(struct initio_host * host);
+
+static void initio_se2_ew_en(unsigned long base);
+static void initio_se2_ew_ds(unsigned long base);
+static int initio_se2_rd_all(unsigned long base);
+static void initio_se2_update_all(unsigned long base); /* setup default pattern */
+static void initio_read_eeprom(unsigned long base);
+
+/* ---- INTERNAL VARIABLES ---- */
+
+static NVRAM i91unvram;
+static NVRAM *i91unvramp;
+
+static u8 i91udftNvRam[64] =
+{
+ /*----------- header -----------*/
+ 0x25, 0xc9, /* Signature */
+ 0x40, /* Size */
+ 0x01, /* Revision */
+ /* -- Host Adapter Structure -- */
+ 0x95, /* ModelByte0 */
+ 0x00, /* ModelByte1 */
+ 0x00, /* ModelInfo */
+ 0x01, /* NumOfCh */
+ NBC1_DEFAULT, /* BIOSConfig1 */
+ 0, /* BIOSConfig2 */
+ 0, /* HAConfig1 */
+ 0, /* HAConfig2 */
+ /* SCSI channel 0 and target Structure */
+ 7, /* SCSIid */
+ NCC1_DEFAULT, /* SCSIconfig1 */
+ 0, /* SCSIconfig2 */
+ 0x10, /* NumSCSItarget */
+
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+
+ /* SCSI channel 1 and target Structure */
+ 7, /* SCSIid */
+ NCC1_DEFAULT, /* SCSIconfig1 */
+ 0, /* SCSIconfig2 */
+ 0x10, /* NumSCSItarget */
+
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT, NTC_DEFAULT,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0}; /* - CheckSum - */
+
+
+static u8 initio_rate_tbl[8] = /* fast 20 */
+{
+ /* nanosecond divide by 4 */
+ 12, /* 50ns, 20M */
+ 18, /* 75ns, 13.3M */
+ 25, /* 100ns, 10M */
+ 31, /* 125ns, 8M */
+ 37, /* 150ns, 6.6M */
+ 43, /* 175ns, 5.7M */
+ 50, /* 200ns, 5M */
+ 62 /* 250ns, 4M */
+};
+
+static void initio_do_pause(unsigned amount)
+{
+ /* Pause for amount jiffies */
+ unsigned long the_time = jiffies + amount;
+
+ while (time_before_eq(jiffies, the_time))
+ cpu_relax();
+}
+
+/*-- forward reference --*/
+
+/******************************************************************
+ Input: instruction for Serial E2PROM
+
+ EX: se2_rd(0 call se2_instr() to send address and read command
+
+ StartBit OP_Code Address Data
+ --------- -------- ------------------ -------
+ 1 1 , 0 A5,A4,A3,A2,A1,A0 D15-D0
+
+ +-----------------------------------------------------
+ |
+ CS -----+
+ +--+ +--+ +--+ +--+ +--+
+ ^ | ^ | ^ | ^ | ^ |
+ | | | | | | | | | |
+ CLK -------+ +--+ +--+ +--+ +--+ +--
+ (leading edge trigger)
+
+ +--1-----1--+
+ | SB OP | OP A5 A4
+ DI ----+ +--0------------------
+ (address and cmd sent to nvram)
+
+ -------------------------------------------+
+ |
+ DO +---
+ (data sent from nvram)
+
+
+******************************************************************/
+
+/**
+ * initio_se2_instr - bitbang an instruction
+ * @base: Base of InitIO controller
+ * @instr: Instruction for serial E2PROM
+ *
+ * Bitbang an instruction out to the serial E2Prom
+ */
+
+static void initio_se2_instr(unsigned long base, u8 instr)
+{
+ int i;
+ u8 b;
+
+ outb(SE2CS | SE2DO, base + TUL_NVRAM); /* cs+start bit */
+ udelay(30);
+ outb(SE2CS | SE2CLK | SE2DO, base + TUL_NVRAM); /* +CLK */
+ udelay(30);
+
+ for (i = 0; i < 8; i++) {
+ if (instr & 0x80)
+ b = SE2CS | SE2DO; /* -CLK+dataBit */
+ else
+ b = SE2CS; /* -CLK */
+ outb(b, base + TUL_NVRAM);
+ udelay(30);
+ outb(b | SE2CLK, base + TUL_NVRAM); /* +CLK */
+ udelay(30);
+ instr <<= 1;
+ }
+ outb(SE2CS, base + TUL_NVRAM); /* -CLK */
+ udelay(30);
+}
+
+
+/**
+ * initio_se2_ew_en - Enable erase/write
+ * @base: Base address of InitIO controller
+ *
+ * Enable erase/write state of serial EEPROM
+ */
+void initio_se2_ew_en(unsigned long base)
+{
+ initio_se2_instr(base, 0x30); /* EWEN */
+ outb(0, base + TUL_NVRAM); /* -CS */
+ udelay(30);
+}
+
+
+/**
+ * initio_se2_ew_ds - Disable erase/write
+ * @base: Base address of InitIO controller
+ *
+ * Disable erase/write state of serial EEPROM
+ */
+void initio_se2_ew_ds(unsigned long base)
+{
+ initio_se2_instr(base, 0); /* EWDS */
+ outb(0, base + TUL_NVRAM); /* -CS */
+ udelay(30);
+}
+
+
+/**
+ * initio_se2_rd - read E2PROM word
+ * @base: Base of InitIO controller
+ * @addr: Address of word in E2PROM
+ *
+ * Read a word from the NV E2PROM device
+ */
+static u16 initio_se2_rd(unsigned long base, u8 addr)
+{
+ u8 instr, rb;
+ u16 val = 0;
+ int i;
+
+ instr = (u8) (addr | 0x80);
+ initio_se2_instr(base, instr); /* READ INSTR */
+
+ for (i = 15; i >= 0; i--) {
+ outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
+ udelay(30);
+ outb(SE2CS, base + TUL_NVRAM); /* -CLK */
+
+ /* sample data after the following edge of clock */
+ rb = inb(base + TUL_NVRAM);
+ rb &= SE2DI;
+ val += (rb << i);
+ udelay(30); /* 6/20/95 */
+ }
+
+ outb(0, base + TUL_NVRAM); /* no chip select */
+ udelay(30);
+ return val;
+}
+
+/**
+ * initio_se2_wr - read E2PROM word
+ * @base: Base of InitIO controller
+ * @addr: Address of word in E2PROM
+ * @val: Value to write
+ *
+ * Write a word to the NV E2PROM device. Used when recovering from
+ * a problem with the NV.
+ */
+static void initio_se2_wr(unsigned long base, u8 addr, u16 val)
+{
+ u8 rb;
+ u8 instr;
+ int i;
+
+ instr = (u8) (addr | 0x40);
+ initio_se2_instr(base, instr); /* WRITE INSTR */
+ for (i = 15; i >= 0; i--) {
+ if (val & 0x8000)
+ outb(SE2CS | SE2DO, base + TUL_NVRAM); /* -CLK+dataBit 1 */
+ else
+ outb(SE2CS, base + TUL_NVRAM); /* -CLK+dataBit 0 */
+ udelay(30);
+ outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
+ udelay(30);
+ val <<= 1;
+ }
+ outb(SE2CS, base + TUL_NVRAM); /* -CLK */
+ udelay(30);
+ outb(0, base + TUL_NVRAM); /* -CS */
+ udelay(30);
+
+ outb(SE2CS, base + TUL_NVRAM); /* +CS */
+ udelay(30);
+
+ for (;;) {
+ outb(SE2CS | SE2CLK, base + TUL_NVRAM); /* +CLK */
+ udelay(30);
+ outb(SE2CS, base + TUL_NVRAM); /* -CLK */
+ udelay(30);
+ if ((rb = inb(base + TUL_NVRAM)) & SE2DI)
+ break; /* write complete */
+ }
+ outb(0, base + TUL_NVRAM); /* -CS */
+}
+
+/**
+ * initio_se2_rd_all - read hostadapter NV configuration
+ * @base: Base address of InitIO controller
+ *
+ * Reads the E2PROM data into main memory. Ensures that the checksum
+ * and header marker are valid. Returns 1 on success -1 on error.
+ */
+
+static int initio_se2_rd_all(unsigned long base)
+{
+ int i;
+ u16 chksum = 0;
+ u16 *np;
+
+ i91unvramp = &i91unvram;
+ np = (u16 *) i91unvramp;
+ for (i = 0; i < 32; i++)
+ *np++ = initio_se2_rd(base, i);
+
+ /* Is signature "ini" ok ? */
+ if (i91unvramp->NVM_Signature != INI_SIGNATURE)
+ return -1;
+ /* Is ckecksum ok ? */
+ np = (u16 *) i91unvramp;
+ for (i = 0; i < 31; i++)
+ chksum += *np++;
+ if (i91unvramp->NVM_CheckSum != chksum)
+ return -1;
+ return 1;
+}
+
+/**
+ * initio_se2_update_all - Update E2PROM
+ * @base: Base of InitIO controller
+ *
+ * Update the E2PROM by wrting any changes into the E2PROM
+ * chip, rewriting the checksum.
+ */
+static void initio_se2_update_all(unsigned long base)
+{ /* setup default pattern */
+ int i;
+ u16 chksum = 0;
+ u16 *np, *np1;
+
+ i91unvramp = &i91unvram;
+ /* Calculate checksum first */
+ np = (u16 *) i91udftNvRam;
+ for (i = 0; i < 31; i++)
+ chksum += *np++;
+ *np = chksum;
+ initio_se2_ew_en(base); /* Enable write */
+
+ np = (u16 *) i91udftNvRam;
+ np1 = (u16 *) i91unvramp;
+ for (i = 0; i < 32; i++, np++, np1++) {
+ if (*np != *np1)
+ initio_se2_wr(base, i, *np);
+ }
+ initio_se2_ew_ds(base); /* Disable write */
+}
+
+/**
+ * initio_read_eeprom - Retrieve configuration
+ * @base: Base of InitIO Host Adapter
+ *
+ * Retrieve the host adapter configuration data from E2Prom. If the
+ * data is invalid then the defaults are used and are also restored
+ * into the E2PROM. This forms the access point for the SCSI driver
+ * into the E2PROM layer, the other functions for the E2PROM are all
+ * internal use.
+ *
+ * Must be called single threaded, uses a shared global area.
+ */
+
+static void initio_read_eeprom(unsigned long base)
+{
+ u8 gctrl;
+
+ i91unvramp = &i91unvram;
+ /* Enable EEProm programming */
+ gctrl = inb(base + TUL_GCTRL);
+ outb(gctrl | TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
+ if (initio_se2_rd_all(base) != 1) {
+ initio_se2_update_all(base); /* setup default pattern */
+ initio_se2_rd_all(base); /* load again */
+ }
+ /* Disable EEProm programming */
+ gctrl = inb(base + TUL_GCTRL);
+ outb(gctrl & ~TUL_GCTRL_EEPROM_BIT, base + TUL_GCTRL);
+}
+
+/**
+ * initio_stop_bm - stop bus master
+ * @host: InitIO we are stopping
+ *
+ * Stop any pending DMA operation, aborting the DMA if necessary
+ */
+
+static void initio_stop_bm(struct initio_host * host)
+{
+
+ if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
+ outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
+ /* wait Abort DMA xfer done */
+ while ((inb(host->addr + TUL_Int) & XABT) == 0)
+ cpu_relax();
+ }
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+}
+
+/**
+ * initio_reset_scsi - Reset SCSI host controller
+ * @host: InitIO host to reset
+ * @seconds: Recovery time
+ *
+ * Perform a full reset of the SCSI subsystem.
+ */
+
+static int initio_reset_scsi(struct initio_host * host, int seconds)
+{
+ outb(TSC_RST_BUS, host->addr + TUL_SCtrl0);
+
+ while (!((host->jsint = inb(host->addr + TUL_SInt)) & TSS_SCSIRST_INT))
+ cpu_relax();
+
+ /* reset tulip chip */
+ outb(0, host->addr + TUL_SSignal);
+
+ /* Stall for a while, wait for target's firmware ready,make it 2 sec ! */
+ /* SONY 5200 tape drive won't work if only stall for 1 sec */
+ /* FIXME: this is a very long busy wait right now */
+ initio_do_pause(seconds * HZ);
+
+ inb(host->addr + TUL_SInt);
+ return SCSI_RESET_SUCCESS;
+}
+
+/**
+ * initio_init - set up an InitIO host adapter
+ * @host: InitIO host adapter
+ * @num_scbs: Number of SCBS
+ * @bios_addr: BIOS address
+ *
+ * Set up the host adapter and devices according to the configuration
+ * retrieved from the E2PROM.
+ *
+ * Locking: Calls E2PROM layer code which is not re-enterable so must
+ * run single threaded for now.
+ */
+
+static void initio_init(struct initio_host * host, u8 *bios_addr)
+{
+ int i;
+ u8 *flags;
+ u8 *heads;
+
+ /* Get E2Prom configuration */
+ initio_read_eeprom(host->addr);
+ if (i91unvramp->NVM_SCSIInfo[0].NVM_NumOfTarg == 8)
+ host->max_tar = 8;
+ else
+ host->max_tar = 16;
+
+ host->config = i91unvramp->NVM_SCSIInfo[0].NVM_ChConfig1;
+
+ host->scsi_id = i91unvramp->NVM_SCSIInfo[0].NVM_ChSCSIID;
+ host->idmask = ~(1 << host->scsi_id);
+
+#ifdef CHK_PARITY
+ /* Enable parity error response */
+ outb(inb(host->addr + TUL_PCMD) | 0x40, host->addr + TUL_PCMD);
+#endif
+
+ /* Mask all the interrupt */
+ outb(0x1F, host->addr + TUL_Mask);
+
+ initio_stop_bm(host);
+ /* --- Initialize the tulip --- */
+ outb(TSC_RST_CHIP, host->addr + TUL_SCtrl0);
+
+ /* program HBA's SCSI ID */
+ outb(host->scsi_id << 4, host->addr + TUL_SScsiId);
+
+ /* Enable Initiator Mode ,phase latch,alternate sync period mode,
+ disable SCSI reset */
+ if (host->config & HCC_EN_PAR)
+ host->sconf1 = (TSC_INITDEFAULT | TSC_EN_SCSI_PAR);
+ else
+ host->sconf1 = (TSC_INITDEFAULT);
+ outb(host->sconf1, host->addr + TUL_SConfig);
+
+ /* Enable HW reselect */
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
+
+ outb(0, host->addr + TUL_SPeriod);
+
+ /* selection time out = 250 ms */
+ outb(153, host->addr + TUL_STimeOut);
+
+ /* Enable SCSI terminator */
+ outb((host->config & (HCC_ACT_TERM1 | HCC_ACT_TERM2)),
+ host->addr + TUL_XCtrl);
+ outb(((host->config & HCC_AUTO_TERM) >> 4) |
+ (inb(host->addr + TUL_GCTRL1) & 0xFE),
+ host->addr + TUL_GCTRL1);
+
+ for (i = 0,
+ flags = & (i91unvramp->NVM_SCSIInfo[0].NVM_Targ0Config),
+ heads = bios_addr + 0x180;
+ i < host->max_tar;
+ i++, flags++) {
+ host->targets[i].flags = *flags & ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
+ if (host->targets[i].flags & TCF_EN_255)
+ host->targets[i].drv_flags = TCF_DRV_255_63;
+ else
+ host->targets[i].drv_flags = 0;
+ host->targets[i].js_period = 0;
+ host->targets[i].sconfig0 = host->sconf1;
+ host->targets[i].heads = *heads++;
+ if (host->targets[i].heads == 255)
+ host->targets[i].drv_flags = TCF_DRV_255_63;
+ else
+ host->targets[i].drv_flags = 0;
+ host->targets[i].sectors = *heads++;
+ host->targets[i].flags &= ~TCF_BUSY;
+ host->act_tags[i] = 0;
+ host->max_tags[i] = 0xFF;
+ } /* for */
+ printk("i91u: PCI Base=0x%04X, IRQ=%d, BIOS=0x%04X0, SCSI ID=%d\n",
+ host->addr, host->pci_dev->irq,
+ host->bios_addr, host->scsi_id);
+ /* Reset SCSI Bus */
+ if (host->config & HCC_SCSI_RESET) {
+ printk(KERN_INFO "i91u: Reset SCSI Bus ... \n");
+ initio_reset_scsi(host, 10);
+ }
+ outb(0x17, host->addr + TUL_SCFG1);
+ outb(0xE9, host->addr + TUL_SIntEnable);
+}
+
+/**
+ * initio_alloc_scb - Allocate an SCB
+ * @host: InitIO host we are allocating for
+ *
+ * Walk the SCB list for the controller and allocate a free SCB if
+ * one exists.
+ */
+static struct scsi_ctrl_blk *initio_alloc_scb(struct initio_host *host)
+{
+ struct scsi_ctrl_blk *scb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->avail_lock, flags);
+ if ((scb = host->first_avail) != NULL) {
+#if DEBUG_QUEUE
+ printk("find scb at %p\n", scb);
+#endif
+ if ((host->first_avail = scb->next) == NULL)
+ host->last_avail = NULL;
+ scb->next = NULL;
+ scb->status = SCB_RENT;
+ }
+ spin_unlock_irqrestore(&host->avail_lock, flags);
+ return scb;
+}
+
+/**
+ * initio_release_scb - Release an SCB
+ * @host: InitIO host that owns the SCB
+ * @cmnd: SCB command block being returned
+ *
+ * Return an allocated SCB to the host free list
+ */
+
+static void initio_release_scb(struct initio_host * host, struct scsi_ctrl_blk * cmnd)
+{
+ unsigned long flags;
+
+#if DEBUG_QUEUE
+ printk("Release SCB %p; ", cmnd);
+#endif
+ spin_lock_irqsave(&(host->avail_lock), flags);
+ cmnd->srb = NULL;
+ cmnd->status = 0;
+ cmnd->next = NULL;
+ if (host->last_avail != NULL) {
+ host->last_avail->next = cmnd;
+ host->last_avail = cmnd;
+ } else {
+ host->first_avail = cmnd;
+ host->last_avail = cmnd;
+ }
+ spin_unlock_irqrestore(&(host->avail_lock), flags);
+}
+
+/***************************************************************************/
+static void initio_append_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
+{
+
+#if DEBUG_QUEUE
+ printk("Append pend SCB %p; ", scbp);
+#endif
+ scbp->status = SCB_PEND;
+ scbp->next = NULL;
+ if (host->last_pending != NULL) {
+ host->last_pending->next = scbp;
+ host->last_pending = scbp;
+ } else {
+ host->first_pending = scbp;
+ host->last_pending = scbp;
+ }
+}
+
+/***************************************************************************/
+static void initio_push_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
+{
+
+#if DEBUG_QUEUE
+ printk("Push pend SCB %p; ", scbp);
+#endif
+ scbp->status = SCB_PEND;
+ if ((scbp->next = host->first_pending) != NULL) {
+ host->first_pending = scbp;
+ } else {
+ host->first_pending = scbp;
+ host->last_pending = scbp;
+ }
+}
+
+static struct scsi_ctrl_blk *initio_find_first_pend_scb(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *first;
+
+
+ first = host->first_pending;
+ while (first != NULL) {
+ if (first->opcode != ExecSCSI)
+ return first;
+ if (first->tagmsg == 0) {
+ if ((host->act_tags[first->target] == 0) &&
+ !(host->targets[first->target].flags & TCF_BUSY))
+ return first;
+ } else {
+ if ((host->act_tags[first->target] >=
+ host->max_tags[first->target]) |
+ (host->targets[first->target].flags & TCF_BUSY)) {
+ first = first->next;
+ continue;
+ }
+ return first;
+ }
+ first = first->next;
+ }
+ return first;
+}
+
+static void initio_unlink_pend_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ struct scsi_ctrl_blk *tmp, *prev;
+
+#if DEBUG_QUEUE
+ printk("unlink pend SCB %p; ", scb);
+#endif
+
+ prev = tmp = host->first_pending;
+ while (tmp != NULL) {
+ if (scb == tmp) { /* Unlink this SCB */
+ if (tmp == host->first_pending) {
+ if ((host->first_pending = tmp->next) == NULL)
+ host->last_pending = NULL;
+ } else {
+ prev->next = tmp->next;
+ if (tmp == host->last_pending)
+ host->last_pending = prev;
+ }
+ tmp->next = NULL;
+ break;
+ }
+ prev = tmp;
+ tmp = tmp->next;
+ }
+}
+
+static void initio_append_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
+{
+
+#if DEBUG_QUEUE
+ printk("append busy SCB %p; ", scbp);
+#endif
+ if (scbp->tagmsg)
+ host->act_tags[scbp->target]++;
+ else
+ host->targets[scbp->target].flags |= TCF_BUSY;
+ scbp->status = SCB_BUSY;
+ scbp->next = NULL;
+ if (host->last_busy != NULL) {
+ host->last_busy->next = scbp;
+ host->last_busy = scbp;
+ } else {
+ host->first_busy = scbp;
+ host->last_busy = scbp;
+ }
+}
+
+/***************************************************************************/
+static struct scsi_ctrl_blk *initio_pop_busy_scb(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *tmp;
+
+
+ if ((tmp = host->first_busy) != NULL) {
+ if ((host->first_busy = tmp->next) == NULL)
+ host->last_busy = NULL;
+ tmp->next = NULL;
+ if (tmp->tagmsg)
+ host->act_tags[tmp->target]--;
+ else
+ host->targets[tmp->target].flags &= ~TCF_BUSY;
+ }
+#if DEBUG_QUEUE
+ printk("Pop busy SCB %p; ", tmp);
+#endif
+ return tmp;
+}
+
+/***************************************************************************/
+static void initio_unlink_busy_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ struct scsi_ctrl_blk *tmp, *prev;
+
+#if DEBUG_QUEUE
+ printk("unlink busy SCB %p; ", scb);
+#endif
+
+ prev = tmp = host->first_busy;
+ while (tmp != NULL) {
+ if (scb == tmp) { /* Unlink this SCB */
+ if (tmp == host->first_busy) {
+ if ((host->first_busy = tmp->next) == NULL)
+ host->last_busy = NULL;
+ } else {
+ prev->next = tmp->next;
+ if (tmp == host->last_busy)
+ host->last_busy = prev;
+ }
+ tmp->next = NULL;
+ if (tmp->tagmsg)
+ host->act_tags[tmp->target]--;
+ else
+ host->targets[tmp->target].flags &= ~TCF_BUSY;
+ break;
+ }
+ prev = tmp;
+ tmp = tmp->next;
+ }
+ return;
+}
+
+struct scsi_ctrl_blk *initio_find_busy_scb(struct initio_host * host, u16 tarlun)
+{
+ struct scsi_ctrl_blk *tmp, *prev;
+ u16 scbp_tarlun;
+
+
+ prev = tmp = host->first_busy;
+ while (tmp != NULL) {
+ scbp_tarlun = (tmp->lun << 8) | (tmp->target);
+ if (scbp_tarlun == tarlun) { /* Unlink this SCB */
+ break;
+ }
+ prev = tmp;
+ tmp = tmp->next;
+ }
+#if DEBUG_QUEUE
+ printk("find busy SCB %p; ", tmp);
+#endif
+ return tmp;
+}
+
+static void initio_append_done_scb(struct initio_host * host, struct scsi_ctrl_blk * scbp)
+{
+#if DEBUG_QUEUE
+ printk("append done SCB %p; ", scbp);
+#endif
+
+ scbp->status = SCB_DONE;
+ scbp->next = NULL;
+ if (host->last_done != NULL) {
+ host->last_done->next = scbp;
+ host->last_done = scbp;
+ } else {
+ host->first_done = scbp;
+ host->last_done = scbp;
+ }
+}
+
+struct scsi_ctrl_blk *initio_find_done_scb(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *tmp;
+
+ if ((tmp = host->first_done) != NULL) {
+ if ((host->first_done = tmp->next) == NULL)
+ host->last_done = NULL;
+ tmp->next = NULL;
+ }
+#if DEBUG_QUEUE
+ printk("find done SCB %p; ",tmp);
+#endif
+ return tmp;
+}
+
+static int initio_abort_srb(struct initio_host * host, struct scsi_cmnd *srbp)
+{
+ unsigned long flags;
+ struct scsi_ctrl_blk *tmp, *prev;
+
+ spin_lock_irqsave(&host->semaph_lock, flags);
+
+ if ((host->semaph == 0) && (host->active == NULL)) {
+ /* disable Jasmin SCSI Int */
+ outb(0x1F, host->addr + TUL_Mask);
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ /* FIXME: synchronize_irq needed ? */
+ tulip_main(host);
+ spin_lock_irqsave(&host->semaph_lock, flags);
+ host->semaph = 1;
+ outb(0x0F, host->addr + TUL_Mask);
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_SNOOZE;
+ }
+ prev = tmp = host->first_pending; /* Check Pend queue */
+ while (tmp != NULL) {
+ /* 07/27/98 */
+ if (tmp->srb == srbp) {
+ if (tmp == host->active) {
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_BUSY;
+ } else if (tmp == host->first_pending) {
+ if ((host->first_pending = tmp->next) == NULL)
+ host->last_pending = NULL;
+ } else {
+ prev->next = tmp->next;
+ if (tmp == host->last_pending)
+ host->last_pending = prev;
+ }
+ tmp->hastat = HOST_ABORTED;
+ tmp->flags |= SCF_DONE;
+ if (tmp->flags & SCF_POST)
+ (*tmp->post) ((u8 *) host, (u8 *) tmp);
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_SUCCESS;
+ }
+ prev = tmp;
+ tmp = tmp->next;
+ }
+
+ prev = tmp = host->first_busy; /* Check Busy queue */
+ while (tmp != NULL) {
+ if (tmp->srb == srbp) {
+ if (tmp == host->active) {
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_BUSY;
+ } else if (tmp->tagmsg == 0) {
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_BUSY;
+ } else {
+ host->act_tags[tmp->target]--;
+ if (tmp == host->first_busy) {
+ if ((host->first_busy = tmp->next) == NULL)
+ host->last_busy = NULL;
+ } else {
+ prev->next = tmp->next;
+ if (tmp == host->last_busy)
+ host->last_busy = prev;
+ }
+ tmp->next = NULL;
+
+
+ tmp->hastat = HOST_ABORTED;
+ tmp->flags |= SCF_DONE;
+ if (tmp->flags & SCF_POST)
+ (*tmp->post) ((u8 *) host, (u8 *) tmp);
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_SUCCESS;
+ }
+ }
+ prev = tmp;
+ tmp = tmp->next;
+ }
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return SCSI_ABORT_NOT_RUNNING;
+}
+
+/***************************************************************************/
+static int initio_bad_seq(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+
+ printk("initio_bad_seg c=%d\n", host->index);
+
+ if ((scb = host->active) != NULL) {
+ initio_unlink_busy_scb(host, scb);
+ scb->hastat = HOST_BAD_PHAS;
+ scb->tastat = 0;
+ initio_append_done_scb(host, scb);
+ }
+ initio_stop_bm(host);
+ initio_reset_scsi(host, 8); /* 7/29/98 */
+ return initio_post_scsi_rst(host);
+}
+
+
+/************************************************************************/
+static void initio_exec_scb(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ unsigned long flags;
+
+ scb->mode = 0;
+
+ scb->sgidx = 0;
+ scb->sgmax = scb->sglen;
+
+ spin_lock_irqsave(&host->semaph_lock, flags);
+
+ initio_append_pend_scb(host, scb); /* Append this SCB to Pending queue */
+
+/* VVVVV 07/21/98 */
+ if (host->semaph == 1) {
+ /* Disable Jasmin SCSI Int */
+ outb(0x1F, host->addr + TUL_Mask);
+ host->semaph = 0;
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+
+ tulip_main(host);
+
+ spin_lock_irqsave(&host->semaph_lock, flags);
+ host->semaph = 1;
+ outb(0x0F, host->addr + TUL_Mask);
+ }
+ spin_unlock_irqrestore(&host->semaph_lock, flags);
+ return;
+}
+
+/***************************************************************************/
+static int initio_isr(struct initio_host * host)
+{
+ if (inb(host->addr + TUL_Int) & TSS_INT_PENDING) {
+ if (host->semaph == 1) {
+ outb(0x1F, host->addr + TUL_Mask);
+ /* Disable Tulip SCSI Int */
+ host->semaph = 0;
+
+ tulip_main(host);
+
+ host->semaph = 1;
+ outb(0x0F, host->addr + TUL_Mask);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static int tulip_main(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+
+ for (;;) {
+ tulip_scsi(host); /* Call tulip_scsi */
+
+ /* Walk the list of completed SCBs */
+ while ((scb = initio_find_done_scb(host)) != NULL) { /* find done entry */
+ if (scb->tastat == INI_QUEUE_FULL) {
+ host->max_tags[scb->target] =
+ host->act_tags[scb->target] - 1;
+ scb->tastat = 0;
+ initio_append_pend_scb(host, scb);
+ continue;
+ }
+ if (!(scb->mode & SCM_RSENS)) { /* not in auto req. sense mode */
+ if (scb->tastat == 2) {
+
+ /* clr sync. nego flag */
+
+ if (scb->flags & SCF_SENSE) {
+ u8 len;
+ len = scb->senselen;
+ if (len == 0)
+ len = 1;
+ scb->buflen = scb->senselen;
+ scb->bufptr = scb->senseptr;
+ scb->flags &= ~(SCF_SG | SCF_DIR); /* for xfer_data_in */
+ /* so, we won't report wrong direction in xfer_data_in,
+ and won't report HOST_DO_DU in state_6 */
+ scb->mode = SCM_RSENS;
+ scb->ident &= 0xBF; /* Disable Disconnect */
+ scb->tagmsg = 0;
+ scb->tastat = 0;
+ scb->cdblen = 6;
+ scb->cdb[0] = SCSICMD_RequestSense;
+ scb->cdb[1] = 0;
+ scb->cdb[2] = 0;
+ scb->cdb[3] = 0;
+ scb->cdb[4] = len;
+ scb->cdb[5] = 0;
+ initio_push_pend_scb(host, scb);
+ break;
+ }
+ }
+ } else { /* in request sense mode */
+
+ if (scb->tastat == 2) { /* check contition status again after sending
+ requset sense cmd 0x3 */
+ scb->hastat = HOST_BAD_PHAS;
+ }
+ scb->tastat = 2;
+ }
+ scb->flags |= SCF_DONE;
+ if (scb->flags & SCF_POST) {
+ /* FIXME: only one post method and lose casts */
+ (*scb->post) ((u8 *) host, (u8 *) scb);
+ }
+ } /* while */
+ /* find_active: */
+ if (inb(host->addr + TUL_SStatus0) & TSS_INT_PENDING)
+ continue;
+ if (host->active) /* return to OS and wait for xfer_done_ISR/Selected_ISR */
+ return 1; /* return to OS, enable interrupt */
+ /* Check pending SCB */
+ if (initio_find_first_pend_scb(host) == NULL)
+ return 1; /* return to OS, enable interrupt */
+ } /* End of for loop */
+ /* statement won't reach here */
+}
+
+static void tulip_scsi(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+ struct target_control *active_tc;
+
+ /* make sure to service interrupt asap */
+ if ((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING) {
+ host->phase = host->jsstatus0 & TSS_PH_MASK;
+ host->jsstatus1 = inb(host->addr + TUL_SStatus1);
+ host->jsint = inb(host->addr + TUL_SInt);
+ if (host->jsint & TSS_SCSIRST_INT) { /* SCSI bus reset detected */
+ int_initio_scsi_rst(host);
+ return;
+ }
+ if (host->jsint & TSS_RESEL_INT) { /* if selected/reselected interrupt */
+ if (int_initio_resel(host) == 0)
+ initio_next_state(host);
+ return;
+ }
+ if (host->jsint & TSS_SEL_TIMEOUT) {
+ int_initio_busfree(host);
+ return;
+ }
+ if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
+ int_initio_busfree(host); /* unexpected bus free or sel timeout */
+ return;
+ }
+ if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV)) { /* func complete or Bus service */
+ if ((scb = host->active) != NULL)
+ initio_next_state(host);
+ return;
+ }
+ }
+ if (host->active != NULL)
+ return;
+
+ if ((scb = initio_find_first_pend_scb(host)) == NULL)
+ return;
+
+ /* program HBA's SCSI ID & target SCSI ID */
+ outb((host->scsi_id << 4) | (scb->target & 0x0F),
+ host->addr + TUL_SScsiId);
+ if (scb->opcode == ExecSCSI) {
+ active_tc = &host->targets[scb->target];
+
+ if (scb->tagmsg)
+ active_tc->drv_flags |= TCF_DRV_EN_TAG;
+ else
+ active_tc->drv_flags &= ~TCF_DRV_EN_TAG;
+
+ outb(active_tc->js_period, host->addr + TUL_SPeriod);
+ if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) { /* do wdtr negotiation */
+ initio_select_atn_stop(host, scb);
+ } else {
+ if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) { /* do sync negotiation */
+ initio_select_atn_stop(host, scb);
+ } else {
+ if (scb->tagmsg)
+ initio_select_atn3(host, scb);
+ else
+ initio_select_atn(host, scb);
+ }
+ }
+ if (scb->flags & SCF_POLL) {
+ while (wait_tulip(host) != -1) {
+ if (initio_next_state(host) == -1)
+ break;
+ }
+ }
+ } else if (scb->opcode == BusDevRst) {
+ initio_select_atn_stop(host, scb);
+ scb->next_state = 8;
+ if (scb->flags & SCF_POLL) {
+ while (wait_tulip(host) != -1) {
+ if (initio_next_state(host) == -1)
+ break;
+ }
+ }
+ } else if (scb->opcode == AbortCmd) {
+ if (initio_abort_srb(host, scb->srb) != 0) {
+ initio_unlink_pend_scb(host, scb);
+ initio_release_scb(host, scb);
+ } else {
+ scb->opcode = BusDevRst;
+ initio_select_atn_stop(host, scb);
+ scb->next_state = 8;
+ }
+ } else {
+ initio_unlink_pend_scb(host, scb);
+ scb->hastat = 0x16; /* bad command */
+ initio_append_done_scb(host, scb);
+ }
+ return;
+}
+
+/**
+ * initio_next_state - Next SCSI state
+ * @host: InitIO host we are processing
+ *
+ * Progress the active command block along the state machine
+ * until we hit a state which we must wait for activity to occur.
+ *
+ * Returns zero or a negative code.
+ */
+
+static int initio_next_state(struct initio_host * host)
+{
+ int next;
+
+ next = host->active->next_state;
+ for (;;) {
+ switch (next) {
+ case 1:
+ next = initio_state_1(host);
+ break;
+ case 2:
+ next = initio_state_2(host);
+ break;
+ case 3:
+ next = initio_state_3(host);
+ break;
+ case 4:
+ next = initio_state_4(host);
+ break;
+ case 5:
+ next = initio_state_5(host);
+ break;
+ case 6:
+ next = initio_state_6(host);
+ break;
+ case 7:
+ next = initio_state_7(host);
+ break;
+ case 8:
+ return initio_bus_device_reset(host);
+ default:
+ return initio_bad_seq(host);
+ }
+ if (next <= 0)
+ return next;
+ }
+}
+
+
+/**
+ * initio_state_1 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * Perform SCSI state processing for Select/Attention/Stop
+ */
+
+static int initio_state_1(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+#if DEBUG_STATE
+ printk("-s1-");
+#endif
+
+ /* Move the SCB from pending to busy */
+ initio_unlink_pend_scb(host, scb);
+ initio_append_busy_scb(host, scb);
+
+ outb(active_tc->sconfig0, host->addr + TUL_SConfig );
+ /* ATN on */
+ if (host->phase == MSG_OUT) {
+ outb(TSC_EN_BUS_IN | TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
+ outb(scb->ident, host->addr + TUL_SFifo);
+
+ if (scb->tagmsg) {
+ outb(scb->tagmsg, host->addr + TUL_SFifo);
+ outb(scb->tagid, host->addr + TUL_SFifo);
+ }
+ if ((active_tc->flags & (TCF_WDTR_DONE | TCF_NO_WDTR)) == 0) {
+ active_tc->flags |= TCF_WDTR_DONE;
+ outb(MSG_EXTEND, host->addr + TUL_SFifo);
+ outb(2, host->addr + TUL_SFifo); /* Extended msg length */
+ outb(3, host->addr + TUL_SFifo); /* Sync request */
+ outb(1, host->addr + TUL_SFifo); /* Start from 16 bits */
+ } else if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) {
+ active_tc->flags |= TCF_SYNC_DONE;
+ outb(MSG_EXTEND, host->addr + TUL_SFifo);
+ outb(3, host->addr + TUL_SFifo); /* extended msg length */
+ outb(1, host->addr + TUL_SFifo); /* sync request */
+ outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
+ outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
+ }
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ }
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
+ /* Into before CDB xfer */
+ return 3;
+}
+
+
+/**
+ * initio_state_2 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * state after selection with attention
+ * state after selection with attention3
+ */
+
+static int initio_state_2(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+#if DEBUG_STATE
+ printk("-s2-");
+#endif
+
+ initio_unlink_pend_scb(host, scb);
+ initio_append_busy_scb(host, scb);
+
+ outb(active_tc->sconfig0, host->addr + TUL_SConfig);
+
+ if (host->jsstatus1 & TSS_CMD_PH_CMP)
+ return 4;
+
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)), host->addr + TUL_SSignal);
+ /* Into before CDB xfer */
+ return 3;
+}
+
+/**
+ * initio_state_3 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * state before CDB xfer is done
+ */
+
+static int initio_state_3(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+ int i;
+
+#if DEBUG_STATE
+ printk("-s3-");
+#endif
+ for (;;) {
+ switch (host->phase) {
+ case CMD_OUT: /* Command out phase */
+ for (i = 0; i < (int) scb->cdblen; i++)
+ outb(scb->cdb[i], host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ if (host->phase == CMD_OUT)
+ return initio_bad_seq(host);
+ return 4;
+
+ case MSG_IN: /* Message in phase */
+ scb->next_state = 3;
+ if (initio_msgin(host) == -1)
+ return -1;
+ break;
+
+ case STATUS_IN: /* Status phase */
+ if (initio_status_msg(host) == -1)
+ return -1;
+ break;
+
+ case MSG_OUT: /* Message out phase */
+ if (active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) {
+ outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ } else {
+ active_tc->flags |= TCF_SYNC_DONE;
+
+ outb(MSG_EXTEND, host->addr + TUL_SFifo);
+ outb(3, host->addr + TUL_SFifo); /* ext. msg len */
+ outb(1, host->addr + TUL_SFifo); /* sync request */
+ outb(initio_rate_tbl[active_tc->flags & TCF_SCSI_RATE], host->addr + TUL_SFifo);
+ outb(MAX_OFFSET, host->addr + TUL_SFifo); /* REQ/ACK offset */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ outb(inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7), host->addr + TUL_SSignal);
+
+ }
+ break;
+ default:
+ return initio_bad_seq(host);
+ }
+ }
+}
+
+/**
+ * initio_state_4 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * SCSI state machine. State 4
+ */
+
+static int initio_state_4(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+
+#if DEBUG_STATE
+ printk("-s4-");
+#endif
+ if ((scb->flags & SCF_DIR) == SCF_NO_XF) {
+ return 6; /* Go to state 6 (After data) */
+ }
+ for (;;) {
+ if (scb->buflen == 0)
+ return 6;
+
+ switch (host->phase) {
+
+ case STATUS_IN: /* Status phase */
+ if ((scb->flags & SCF_DIR) != 0) /* if direction bit set then report data underrun */
+ scb->hastat = HOST_DO_DU;
+ if ((initio_status_msg(host)) == -1)
+ return -1;
+ break;
+
+ case MSG_IN: /* Message in phase */
+ scb->next_state = 0x4;
+ if (initio_msgin(host) == -1)
+ return -1;
+ break;
+
+ case MSG_OUT: /* Message out phase */
+ if (host->jsstatus0 & TSS_PAR_ERROR) {
+ scb->buflen = 0;
+ scb->hastat = HOST_DO_DU;
+ if (initio_msgout_ide(host) == -1)
+ return -1;
+ return 6;
+ } else {
+ outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ }
+ break;
+
+ case DATA_IN: /* Data in phase */
+ return initio_xfer_data_in(host);
+
+ case DATA_OUT: /* Data out phase */
+ return initio_xfer_data_out(host);
+
+ default:
+ return initio_bad_seq(host);
+ }
+ }
+}
+
+
+/**
+ * initio_state_5 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * State after dma xfer done or phase change before xfer done
+ */
+
+static int initio_state_5(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ long cnt, xcnt; /* cannot use unsigned !! code: if (xcnt < 0) */
+
+#if DEBUG_STATE
+ printk("-s5-");
+#endif
+ /*------ get remaining count -------*/
+ cnt = inl(host->addr + TUL_SCnt0) & 0x0FFFFFF;
+
+ if (inb(host->addr + TUL_XCmd) & 0x20) {
+ /* ----------------------- DATA_IN ----------------------------- */
+ /* check scsi parity error */
+ if (host->jsstatus0 & TSS_PAR_ERROR)
+ scb->hastat = HOST_DO_DU;
+ if (inb(host->addr + TUL_XStatus) & XPEND) { /* DMA xfer pending, Send STOP */
+ /* tell Hardware scsi xfer has been terminated */
+ outb(inb(host->addr + TUL_XCtrl) | 0x80, host->addr + TUL_XCtrl);
+ /* wait until DMA xfer not pending */
+ while (inb(host->addr + TUL_XStatus) & XPEND)
+ cpu_relax();
+ }
+ } else {
+ /*-------- DATA OUT -----------*/
+ if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0) {
+ if (host->active_tc->js_period & TSC_WIDE_SCSI)
+ cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F) << 1;
+ else
+ cnt += (inb(host->addr + TUL_SFifoCnt) & 0x1F);
+ }
+ if (inb(host->addr + TUL_XStatus) & XPEND) { /* if DMA xfer is pending, abort DMA xfer */
+ outb(TAX_X_ABT, host->addr + TUL_XCmd);
+ /* wait Abort DMA xfer done */
+ while ((inb(host->addr + TUL_Int) & XABT) == 0)
+ cpu_relax();
+ }
+ if ((cnt == 1) && (host->phase == DATA_OUT)) {
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ cnt = 0;
+ } else {
+ if ((inb(host->addr + TUL_SStatus1) & TSS_XFER_CMP) == 0)
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ }
+ }
+ if (cnt == 0) {
+ scb->buflen = 0;
+ return 6; /* After Data */
+ }
+ /* Update active data pointer */
+ xcnt = (long) scb->buflen - cnt; /* xcnt== bytes already xferred */
+ scb->buflen = (u32) cnt; /* cnt == bytes left to be xferred */
+ if (scb->flags & SCF_SG) {
+ struct sg_entry *sgp;
+ unsigned long i;
+
+ sgp = &scb->sglist[scb->sgidx];
+ for (i = scb->sgidx; i < scb->sgmax; sgp++, i++) {
+ xcnt -= (long) sgp->len;
+ if (xcnt < 0) { /* this sgp xfer half done */
+ xcnt += (long) sgp->len; /* xcnt == bytes xferred in this sgp */
+ sgp->data += (u32) xcnt; /* new ptr to be xfer */
+ sgp->len -= (u32) xcnt; /* new len to be xfer */
+ scb->bufptr += ((u32) (i - scb->sgidx) << 3);
+ /* new SG table ptr */
+ scb->sglen = (u8) (scb->sgmax - i);
+ /* new SG table len */
+ scb->sgidx = (u16) i;
+ /* for next disc and come in this loop */
+ return 4; /* Go to state 4 */
+ }
+ /* else (xcnt >= 0 , i.e. this sgp already xferred */
+ } /* for */
+ return 6; /* Go to state 6 */
+ } else {
+ scb->bufptr += (u32) xcnt;
+ }
+ return 4; /* Go to state 4 */
+}
+
+/**
+ * initio_state_6 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ * State after Data phase
+ */
+
+static int initio_state_6(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+
+#if DEBUG_STATE
+ printk("-s6-");
+#endif
+ for (;;) {
+ switch (host->phase) {
+ case STATUS_IN: /* Status phase */
+ if ((initio_status_msg(host)) == -1)
+ return -1;
+ break;
+
+ case MSG_IN: /* Message in phase */
+ scb->next_state = 6;
+ if ((initio_msgin(host)) == -1)
+ return -1;
+ break;
+
+ case MSG_OUT: /* Message out phase */
+ outb(MSG_NOP, host->addr + TUL_SFifo); /* msg nop */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ break;
+
+ case DATA_IN: /* Data in phase */
+ return initio_xpad_in(host);
+
+ case DATA_OUT: /* Data out phase */
+ return initio_xpad_out(host);
+
+ default:
+ return initio_bad_seq(host);
+ }
+ }
+}
+
+/**
+ * initio_state_7 - SCSI state machine
+ * @host: InitIO host we are controlling
+ *
+ */
+
+int initio_state_7(struct initio_host * host)
+{
+ int cnt, i;
+
+#if DEBUG_STATE
+ printk("-s7-");
+#endif
+ /* flush SCSI FIFO */
+ cnt = inb(host->addr + TUL_SFifoCnt) & 0x1F;
+ if (cnt) {
+ for (i = 0; i < cnt; i++)
+ inb(host->addr + TUL_SFifo);
+ }
+ switch (host->phase) {
+ case DATA_IN: /* Data in phase */
+ case DATA_OUT: /* Data out phase */
+ return initio_bad_seq(host);
+ default:
+ return 6; /* Go to state 6 */
+ }
+}
+
+/**
+ * initio_xfer_data_in - Commence data input
+ * @host: InitIO host in use
+ *
+ * Commence a block of data transfer. The transfer itself will
+ * be managed by the controller and we will get a completion (or
+ * failure) interrupt.
+ */
+static int initio_xfer_data_in(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+
+ if ((scb->flags & SCF_DIR) == SCF_DOUT)
+ return 6; /* wrong direction */
+
+ outl(scb->buflen, host->addr + TUL_SCnt0);
+ outb(TSC_XF_DMA_IN, host->addr + TUL_SCmd); /* 7/25/95 */
+
+ if (scb->flags & SCF_SG) { /* S/G xfer */
+ outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
+ outl(scb->bufptr, host->addr + TUL_XAddH);
+ outb(TAX_SG_IN, host->addr + TUL_XCmd);
+ } else {
+ outl(scb->buflen, host->addr + TUL_XCntH);
+ outl(scb->bufptr, host->addr + TUL_XAddH);
+ outb(TAX_X_IN, host->addr + TUL_XCmd);
+ }
+ scb->next_state = 0x5;
+ return 0; /* return to OS, wait xfer done , let jas_isr come in */
+}
+
+/**
+ * initio_xfer_data_out - Commence data output
+ * @host: InitIO host in use
+ *
+ * Commence a block of data transfer. The transfer itself will
+ * be managed by the controller and we will get a completion (or
+ * failure) interrupt.
+ */
+
+static int initio_xfer_data_out(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+
+ if ((scb->flags & SCF_DIR) == SCF_DIN)
+ return 6; /* wrong direction */
+
+ outl(scb->buflen, host->addr + TUL_SCnt0);
+ outb(TSC_XF_DMA_OUT, host->addr + TUL_SCmd);
+
+ if (scb->flags & SCF_SG) { /* S/G xfer */
+ outl(((u32) scb->sglen) << 3, host->addr + TUL_XCntH);
+ outl(scb->bufptr, host->addr + TUL_XAddH);
+ outb(TAX_SG_OUT, host->addr + TUL_XCmd);
+ } else {
+ outl(scb->buflen, host->addr + TUL_XCntH);
+ outl(scb->bufptr, host->addr + TUL_XAddH);
+ outb(TAX_X_OUT, host->addr + TUL_XCmd);
+ }
+
+ scb->next_state = 0x5;
+ return 0; /* return to OS, wait xfer done , let jas_isr come in */
+}
+
+int initio_xpad_in(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+
+ if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
+ scb->hastat = HOST_DO_DU; /* over run */
+ for (;;) {
+ if (active_tc->js_period & TSC_WIDE_SCSI)
+ outl(2, host->addr + TUL_SCnt0);
+ else
+ outl(1, host->addr + TUL_SCnt0);
+
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ if (host->phase != DATA_IN) {
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ return 6;
+ }
+ inb(host->addr + TUL_SFifo);
+ }
+}
+
+int initio_xpad_out(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+
+ if ((scb->flags & SCF_DIR) != SCF_NO_DCHK)
+ scb->hastat = HOST_DO_DU; /* over run */
+ for (;;) {
+ if (active_tc->js_period & TSC_WIDE_SCSI)
+ outl(2, host->addr + TUL_SCnt0);
+ else
+ outl(1, host->addr + TUL_SCnt0);
+
+ outb(0, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ if ((wait_tulip(host)) == -1)
+ return -1;
+ if (host->phase != DATA_OUT) { /* Disable wide CPU to allow read 16 bits */
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1);
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ return 6;
+ }
+ }
+}
+
+int initio_status_msg(struct initio_host * host)
+{ /* status & MSG_IN */
+ struct scsi_ctrl_blk *scb = host->active;
+ u8 msg;
+
+ outb(TSC_CMD_COMP, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+
+ /* get status */
+ scb->tastat = inb(host->addr + TUL_SFifo);
+
+ if (host->phase == MSG_OUT) {
+ if (host->jsstatus0 & TSS_PAR_ERROR)
+ outb(MSG_PARITY, host->addr + TUL_SFifo);
+ else
+ outb(MSG_NOP, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+ }
+ if (host->phase == MSG_IN) {
+ msg = inb(host->addr + TUL_SFifo);
+ if (host->jsstatus0 & TSS_PAR_ERROR) { /* Parity error */
+ if ((initio_msgin_accept(host)) == -1)
+ return -1;
+ if (host->phase != MSG_OUT)
+ return initio_bad_seq(host);
+ outb(MSG_PARITY, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+ }
+ if (msg == 0) { /* Command complete */
+
+ if ((scb->tastat & 0x18) == 0x10) /* No link support */
+ return initio_bad_seq(host);
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
+ return initio_wait_done_disc(host);
+
+ }
+ if (msg == MSG_LINK_COMP || msg == MSG_LINK_FLAG) {
+ if ((scb->tastat & 0x18) == 0x10)
+ return initio_msgin_accept(host);
+ }
+ }
+ return initio_bad_seq(host);
+}
+
+
+/* scsi bus free */
+int int_initio_busfree(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+
+ if (scb != NULL) {
+ if (scb->status & SCB_SELECT) { /* selection timeout */
+ initio_unlink_pend_scb(host, scb);
+ scb->hastat = HOST_SEL_TOUT;
+ initio_append_done_scb(host, scb);
+ } else { /* Unexpected bus free */
+ initio_unlink_busy_scb(host, scb);
+ scb->hastat = HOST_BUS_FREE;
+ initio_append_done_scb(host, scb);
+ }
+ host->active = NULL;
+ host->active_tc = NULL;
+ }
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
+ outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
+ return -1;
+}
+
+
+/**
+ * int_initio_scsi_rst - SCSI reset occurred
+ * @host: Host seeing the reset
+ *
+ * A SCSI bus reset has occurred. Clean up any pending transfer
+ * the hardware is doing by DMA and then abort all active and
+ * disconnected commands. The mid layer should sort the rest out
+ * for us
+ */
+
+static int int_initio_scsi_rst(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+ int i;
+
+ /* if DMA xfer is pending, abort DMA xfer */
+ if (inb(host->addr + TUL_XStatus) & 0x01) {
+ outb(TAX_X_ABT | TAX_X_CLR_FIFO, host->addr + TUL_XCmd);
+ /* wait Abort DMA xfer done */
+ while ((inb(host->addr + TUL_Int) & 0x04) == 0)
+ cpu_relax();
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ }
+ /* Abort all active & disconnected scb */
+ while ((scb = initio_pop_busy_scb(host)) != NULL) {
+ scb->hastat = HOST_BAD_PHAS;
+ initio_append_done_scb(host, scb);
+ }
+ host->active = NULL;
+ host->active_tc = NULL;
+
+ /* clr sync nego. done flag */
+ for (i = 0; i < host->max_tar; i++)
+ host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
+ return -1;
+}
+
+/**
+ * int_initio_scsi_resel - Reselection occurred
+ * @host: InitIO host adapter
+ *
+ * A SCSI reselection event has been signalled and the interrupt
+ * is now being processed. Work out which command block needs attention
+ * and continue processing that command.
+ */
+
+int int_initio_resel(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+ struct target_control *active_tc;
+ u8 tag, msg = 0;
+ u8 tar, lun;
+
+ if ((scb = host->active) != NULL) {
+ /* FIXME: Why check and not just clear ? */
+ if (scb->status & SCB_SELECT) /* if waiting for selection complete */
+ scb->status &= ~SCB_SELECT;
+ host->active = NULL;
+ }
+ /* --------- get target id---------------------- */
+ tar = inb(host->addr + TUL_SBusId);
+ /* ------ get LUN from Identify message----------- */
+ lun = inb(host->addr + TUL_SIdent) & 0x0F;
+ /* 07/22/98 from 0x1F -> 0x0F */
+ active_tc = &host->targets[tar];
+ host->active_tc = active_tc;
+ outb(active_tc->sconfig0, host->addr + TUL_SConfig);
+ outb(active_tc->js_period, host->addr + TUL_SPeriod);
+
+ /* ------------- tag queueing ? ------------------- */
+ if (active_tc->drv_flags & TCF_DRV_EN_TAG) {
+ if ((initio_msgin_accept(host)) == -1)
+ return -1;
+ if (host->phase != MSG_IN)
+ goto no_tag;
+ outl(1, host->addr + TUL_SCnt0);
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ msg = inb(host->addr + TUL_SFifo); /* Read Tag Message */
+
+ if (msg < MSG_STAG || msg > MSG_OTAG) /* Is simple Tag */
+ goto no_tag;
+
+ if (initio_msgin_accept(host) == -1)
+ return -1;
+
+ if (host->phase != MSG_IN)
+ goto no_tag;
+
+ outl(1, host->addr + TUL_SCnt0);
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ tag = inb(host->addr + TUL_SFifo); /* Read Tag ID */
+ scb = host->scb + tag;
+ if (scb->target != tar || scb->lun != lun) {
+ return initio_msgout_abort_tag(host);
+ }
+ if (scb->status != SCB_BUSY) { /* 03/24/95 */
+ return initio_msgout_abort_tag(host);
+ }
+ host->active = scb;
+ if ((initio_msgin_accept(host)) == -1)
+ return -1;
+ } else { /* No tag */
+ no_tag:
+ if ((scb = initio_find_busy_scb(host, tar | (lun << 8))) == NULL) {
+ return initio_msgout_abort_targ(host);
+ }
+ host->active = scb;
+ if (!(active_tc->drv_flags & TCF_DRV_EN_TAG)) {
+ if ((initio_msgin_accept(host)) == -1)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/**
+ * int_initio_bad_seq - out of phase
+ * @host: InitIO host flagging event
+ *
+ * We have ended up out of phase somehow. Reset the host controller
+ * and throw all our toys out of the pram. Let the midlayer clean up
+ */
+
+static int int_initio_bad_seq(struct initio_host * host)
+{ /* target wrong phase */
+ struct scsi_ctrl_blk *scb;
+ int i;
+
+ initio_reset_scsi(host, 10);
+
+ while ((scb = initio_pop_busy_scb(host)) != NULL) {
+ scb->hastat = HOST_BAD_PHAS;
+ initio_append_done_scb(host, scb);
+ }
+ for (i = 0; i < host->max_tar; i++)
+ host->targets[i].flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
+ return -1;
+}
+
+
+/**
+ * initio_msgout_abort_targ - abort a tag
+ * @host: InitIO host
+ *
+ * Abort when the target/lun does not match or when our SCB is not
+ * busy. Used by untagged commands.
+ */
+
+static int initio_msgout_abort_targ(struct initio_host * host)
+{
+
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
+ if (initio_msgin_accept(host) == -1)
+ return -1;
+ if (host->phase != MSG_OUT)
+ return initio_bad_seq(host);
+
+ outb(MSG_ABORT, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+
+ return initio_wait_disc(host);
+}
+
+/**
+ * initio_msgout_abort_tag - abort a tag
+ * @host: InitIO host
+ *
+ * Abort when the target/lun does not match or when our SCB is not
+ * busy. Used for tagged commands.
+ */
+
+static int initio_msgout_abort_tag(struct initio_host * host)
+{
+
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
+ if (initio_msgin_accept(host) == -1)
+ return -1;
+ if (host->phase != MSG_OUT)
+ return initio_bad_seq(host);
+
+ outb(MSG_ABORT_TAG, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+
+ return initio_wait_disc(host);
+
+}
+
+/**
+ * initio_msgin - Message in
+ * @host: InitIO Host
+ *
+ * Process incoming message
+ */
+static int initio_msgin(struct initio_host * host)
+{
+ struct target_control *active_tc;
+
+ for (;;) {
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+
+ outl(1, host->addr + TUL_SCnt0);
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+
+ switch (inb(host->addr + TUL_SFifo)) {
+ case MSG_DISC: /* Disconnect msg */
+ outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
+ return initio_wait_disc(host);
+ case MSG_SDP:
+ case MSG_RESTORE:
+ case MSG_NOP:
+ initio_msgin_accept(host);
+ break;
+ case MSG_REJ: /* Clear ATN first */
+ outb((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)),
+ host->addr + TUL_SSignal);
+ active_tc = host->active_tc;
+ if ((active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0) /* do sync nego */
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN),
+ host->addr + TUL_SSignal);
+ initio_msgin_accept(host);
+ break;
+ case MSG_EXTEND: /* extended msg */
+ initio_msgin_extend(host);
+ break;
+ case MSG_IGNOREWIDE:
+ initio_msgin_accept(host);
+ break;
+ case MSG_COMP:
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+ outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
+ return initio_wait_done_disc(host);
+ default:
+ initio_msgout_reject(host);
+ break;
+ }
+ if (host->phase != MSG_IN)
+ return host->phase;
+ }
+ /* statement won't reach here */
+}
+
+static int initio_msgout_reject(struct initio_host * host)
+{
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
+
+ if (initio_msgin_accept(host) == -1)
+ return -1;
+
+ if (host->phase == MSG_OUT) {
+ outb(MSG_REJ, host->addr + TUL_SFifo); /* Msg reject */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+ }
+ return host->phase;
+}
+
+static int initio_msgout_ide(struct initio_host * host)
+{
+ outb(MSG_IDE, host->addr + TUL_SFifo); /* Initiator Detected Error */
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+}
+
+static int initio_msgin_extend(struct initio_host * host)
+{
+ u8 len, idx;
+
+ if (initio_msgin_accept(host) != MSG_IN)
+ return host->phase;
+
+ /* Get extended msg length */
+ outl(1, host->addr + TUL_SCnt0);
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+
+ len = inb(host->addr + TUL_SFifo);
+ host->msg[0] = len;
+ for (idx = 1; len != 0; len--) {
+
+ if ((initio_msgin_accept(host)) != MSG_IN)
+ return host->phase;
+ outl(1, host->addr + TUL_SCnt0);
+ outb(TSC_XF_FIFO_IN, host->addr + TUL_SCmd);
+ if (wait_tulip(host) == -1)
+ return -1;
+ host->msg[idx++] = inb(host->addr + TUL_SFifo);
+ }
+ if (host->msg[1] == 1) { /* if it's synchronous data transfer request */
+ u8 r;
+ if (host->msg[0] != 3) /* if length is not right */
+ return initio_msgout_reject(host);
+ if (host->active_tc->flags & TCF_NO_SYNC_NEGO) { /* Set OFFSET=0 to do async, nego back */
+ host->msg[3] = 0;
+ } else {
+ if (initio_msgin_sync(host) == 0 &&
+ (host->active_tc->flags & TCF_SYNC_DONE)) {
+ initio_sync_done(host);
+ return initio_msgin_accept(host);
+ }
+ }
+
+ r = inb(host->addr + TUL_SSignal);
+ outb((r & (TSC_SET_ACK | 7)) | TSC_SET_ATN,
+ host->addr + TUL_SSignal);
+ if (initio_msgin_accept(host) != MSG_OUT)
+ return host->phase;
+ /* sync msg out */
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0);
+
+ initio_sync_done(host);
+
+ outb(MSG_EXTEND, host->addr + TUL_SFifo);
+ outb(3, host->addr + TUL_SFifo);
+ outb(1, host->addr + TUL_SFifo);
+ outb(host->msg[2], host->addr + TUL_SFifo);
+ outb(host->msg[3], host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+ }
+ if (host->msg[0] != 2 || host->msg[1] != 3)
+ return initio_msgout_reject(host);
+ /* if it's WIDE DATA XFER REQ */
+ if (host->active_tc->flags & TCF_NO_WDTR) {
+ host->msg[2] = 0;
+ } else {
+ if (host->msg[2] > 2) /* > 32 bits */
+ return initio_msgout_reject(host);
+ if (host->msg[2] == 2) { /* == 32 */
+ host->msg[2] = 1;
+ } else {
+ if ((host->active_tc->flags & TCF_NO_WDTR) == 0) {
+ wdtr_done(host);
+ if ((host->active_tc->flags & (TCF_SYNC_DONE | TCF_NO_SYNC_NEGO)) == 0)
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
+ return initio_msgin_accept(host);
+ }
+ }
+ }
+ outb(((inb(host->addr + TUL_SSignal) & (TSC_SET_ACK | 7)) | TSC_SET_ATN), host->addr + TUL_SSignal);
+
+ if (initio_msgin_accept(host) != MSG_OUT)
+ return host->phase;
+ /* WDTR msg out */
+ outb(MSG_EXTEND, host->addr + TUL_SFifo);
+ outb(2, host->addr + TUL_SFifo);
+ outb(3, host->addr + TUL_SFifo);
+ outb(host->msg[2], host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+}
+
+static int initio_msgin_sync(struct initio_host * host)
+{
+ char default_period;
+
+ default_period = initio_rate_tbl[host->active_tc->flags & TCF_SCSI_RATE];
+ if (host->msg[3] > MAX_OFFSET) {
+ host->msg[3] = MAX_OFFSET;
+ if (host->msg[2] < default_period) {
+ host->msg[2] = default_period;
+ return 1;
+ }
+ if (host->msg[2] >= 59) /* Change to async */
+ host->msg[3] = 0;
+ return 1;
+ }
+ /* offset requests asynchronous transfers ? */
+ if (host->msg[3] == 0) {
+ return 0;
+ }
+ if (host->msg[2] < default_period) {
+ host->msg[2] = default_period;
+ return 1;
+ }
+ if (host->msg[2] >= 59) {
+ host->msg[3] = 0;
+ return 1;
+ }
+ return 0;
+}
+
+static int wdtr_done(struct initio_host * host)
+{
+ host->active_tc->flags &= ~TCF_SYNC_DONE;
+ host->active_tc->flags |= TCF_WDTR_DONE;
+
+ host->active_tc->js_period = 0;
+ if (host->msg[2]) /* if 16 bit */
+ host->active_tc->js_period |= TSC_WIDE_SCSI;
+ host->active_tc->sconfig0 &= ~TSC_ALT_PERIOD;
+ outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
+ outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
+
+ return 1;
+}
+
+static int initio_sync_done(struct initio_host * host)
+{
+ int i;
+
+ host->active_tc->flags |= TCF_SYNC_DONE;
+
+ if (host->msg[3]) {
+ host->active_tc->js_period |= host->msg[3];
+ for (i = 0; i < 8; i++) {
+ if (initio_rate_tbl[i] >= host->msg[2]) /* pick the big one */
+ break;
+ }
+ host->active_tc->js_period |= (i << 4);
+ host->active_tc->sconfig0 |= TSC_ALT_PERIOD;
+ }
+ outb(host->active_tc->sconfig0, host->addr + TUL_SConfig);
+ outb(host->active_tc->js_period, host->addr + TUL_SPeriod);
+
+ return -1;
+}
+
+
+static int initio_post_scsi_rst(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb;
+ struct target_control *active_tc;
+ int i;
+
+ host->active = NULL;
+ host->active_tc = NULL;
+ host->flags = 0;
+
+ while ((scb = initio_pop_busy_scb(host)) != NULL) {
+ scb->hastat = HOST_BAD_PHAS;
+ initio_append_done_scb(host, scb);
+ }
+ /* clear sync done flag */
+ active_tc = &host->targets[0];
+ for (i = 0; i < host->max_tar; active_tc++, i++) {
+ active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE);
+ /* Initialize the sync. xfer register values to an asyn xfer */
+ active_tc->js_period = 0;
+ active_tc->sconfig0 = host->sconf1;
+ host->act_tags[0] = 0; /* 07/22/98 */
+ host->targets[i].flags &= ~TCF_BUSY; /* 07/22/98 */
+ } /* for */
+
+ return -1;
+}
+
+static void initio_select_atn_stop(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ scb->status |= SCB_SELECT;
+ scb->next_state = 0x1;
+ host->active = scb;
+ host->active_tc = &host->targets[scb->target];
+ outb(TSC_SELATNSTOP, host->addr + TUL_SCmd);
+}
+
+
+static void initio_select_atn(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ int i;
+
+ scb->status |= SCB_SELECT;
+ scb->next_state = 0x2;
+
+ outb(scb->ident, host->addr + TUL_SFifo);
+ for (i = 0; i < (int) scb->cdblen; i++)
+ outb(scb->cdb[i], host->addr + TUL_SFifo);
+ host->active_tc = &host->targets[scb->target];
+ host->active = scb;
+ outb(TSC_SEL_ATN, host->addr + TUL_SCmd);
+}
+
+static void initio_select_atn3(struct initio_host * host, struct scsi_ctrl_blk * scb)
+{
+ int i;
+
+ scb->status |= SCB_SELECT;
+ scb->next_state = 0x2;
+
+ outb(scb->ident, host->addr + TUL_SFifo);
+ outb(scb->tagmsg, host->addr + TUL_SFifo);
+ outb(scb->tagid, host->addr + TUL_SFifo);
+ for (i = 0; i < scb->cdblen; i++)
+ outb(scb->cdb[i], host->addr + TUL_SFifo);
+ host->active_tc = &host->targets[scb->target];
+ host->active = scb;
+ outb(TSC_SEL_ATN3, host->addr + TUL_SCmd);
+}
+
+/**
+ * initio_bus_device_reset - SCSI Bus Device Reset
+ * @host: InitIO host to reset
+ *
+ * Perform a device reset and abort all pending SCBs for the
+ * victim device
+ */
+int initio_bus_device_reset(struct initio_host * host)
+{
+ struct scsi_ctrl_blk *scb = host->active;
+ struct target_control *active_tc = host->active_tc;
+ struct scsi_ctrl_blk *tmp, *prev;
+ u8 tar;
+
+ if (host->phase != MSG_OUT)
+ return int_initio_bad_seq(host); /* Unexpected phase */
+
+ initio_unlink_pend_scb(host, scb);
+ initio_release_scb(host, scb);
+
+
+ tar = scb->target; /* target */
+ active_tc->flags &= ~(TCF_SYNC_DONE | TCF_WDTR_DONE | TCF_BUSY);
+ /* clr sync. nego & WDTR flags 07/22/98 */
+
+ /* abort all SCB with same target */
+ prev = tmp = host->first_busy; /* Check Busy queue */
+ while (tmp != NULL) {
+ if (tmp->target == tar) {
+ /* unlink it */
+ if (tmp == host->first_busy) {
+ if ((host->first_busy = tmp->next) == NULL)
+ host->last_busy = NULL;
+ } else {
+ prev->next = tmp->next;
+ if (tmp == host->last_busy)
+ host->last_busy = prev;
+ }
+ tmp->hastat = HOST_ABORTED;
+ initio_append_done_scb(host, tmp);
+ }
+ /* Previous haven't change */
+ else {
+ prev = tmp;
+ }
+ tmp = tmp->next;
+ }
+ outb(MSG_DEVRST, host->addr + TUL_SFifo);
+ outb(TSC_XF_FIFO_OUT, host->addr + TUL_SCmd);
+ return initio_wait_disc(host);
+
+}
+
+static int initio_msgin_accept(struct initio_host * host)
+{
+ outb(TSC_MSG_ACCEPT, host->addr + TUL_SCmd);
+ return wait_tulip(host);
+}
+
+static int wait_tulip(struct initio_host * host)
+{
+
+ while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
+ & TSS_INT_PENDING))
+ cpu_relax();
+
+ host->jsint = inb(host->addr + TUL_SInt);
+ host->phase = host->jsstatus0 & TSS_PH_MASK;
+ host->jsstatus1 = inb(host->addr + TUL_SStatus1);
+
+ if (host->jsint & TSS_RESEL_INT) /* if SCSI bus reset detected */
+ return int_initio_resel(host);
+ if (host->jsint & TSS_SEL_TIMEOUT) /* if selected/reselected timeout interrupt */
+ return int_initio_busfree(host);
+ if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
+ return int_initio_scsi_rst(host);
+
+ if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
+ if (host->flags & HCF_EXPECT_DONE_DISC) {
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
+ initio_unlink_busy_scb(host, host->active);
+ host->active->hastat = 0;
+ initio_append_done_scb(host, host->active);
+ host->active = NULL;
+ host->active_tc = NULL;
+ host->flags &= ~HCF_EXPECT_DONE_DISC;
+ outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
+ return -1;
+ }
+ if (host->flags & HCF_EXPECT_DISC) {
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
+ host->active = NULL;
+ host->active_tc = NULL;
+ host->flags &= ~HCF_EXPECT_DISC;
+ outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
+ return -1;
+ }
+ return int_initio_busfree(host);
+ }
+ /* The old code really does the below. Can probably be removed */
+ if (host->jsint & (TSS_FUNC_COMP | TSS_BUS_SERV))
+ return host->phase;
+ return host->phase;
+}
+
+static int initio_wait_disc(struct initio_host * host)
+{
+ while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0)) & TSS_INT_PENDING))
+ cpu_relax();
+
+ host->jsint = inb(host->addr + TUL_SInt);
+
+ if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
+ return int_initio_scsi_rst(host);
+ if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
+ outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
+ host->active = NULL;
+ return -1;
+ }
+ return initio_bad_seq(host);
+}
+
+static int initio_wait_done_disc(struct initio_host * host)
+{
+ while (!((host->jsstatus0 = inb(host->addr + TUL_SStatus0))
+ & TSS_INT_PENDING))
+ cpu_relax();
+
+ host->jsint = inb(host->addr + TUL_SInt);
+
+ if (host->jsint & TSS_SCSIRST_INT) /* if SCSI bus reset detected */
+ return int_initio_scsi_rst(host);
+ if (host->jsint & TSS_DISC_INT) { /* BUS disconnection */
+ outb(TSC_FLUSH_FIFO, host->addr + TUL_SCtrl0); /* Flush SCSI FIFO */
+ outb(TSC_INITDEFAULT, host->addr + TUL_SConfig);
+ outb(TSC_HW_RESELECT, host->addr + TUL_SCtrl1); /* Enable HW reselect */
+ initio_unlink_busy_scb(host, host->active);
+
+ initio_append_done_scb(host, host->active);
+ host->active = NULL;
+ return -1;
+ }
+ return initio_bad_seq(host);
+}
+
+/**
+ * i91u_intr - IRQ handler
+ * @irqno: IRQ number
+ * @dev_id: IRQ identifier
+ *
+ * Take the relevant locks and then invoke the actual isr processing
+ * code under the lock.
+ */
+
+static irqreturn_t i91u_intr(int irqno, void *dev_id)
+{
+ struct Scsi_Host *dev = dev_id;
+ unsigned long flags;
+ int r;
+
+ spin_lock_irqsave(dev->host_lock, flags);
+ r = initio_isr((struct initio_host *)dev->hostdata);
+ spin_unlock_irqrestore(dev->host_lock, flags);
+ if (r)
+ return IRQ_HANDLED;
+ else
+ return IRQ_NONE;
+}
+
+
+/**
+ * initio_build_scb - Build the mappings and SCB
+ * @host: InitIO host taking the command
+ * @cblk: Firmware command block
+ * @cmnd: SCSI midlayer command block
+ *
+ * Translate the abstract SCSI command into a firmware command block
+ * suitable for feeding to the InitIO host controller. This also requires
+ * we build the scatter gather lists and ensure they are mapped properly.
+ */
+
+static void initio_build_scb(struct initio_host * host, struct scsi_ctrl_blk * cblk, struct scsi_cmnd * cmnd)
+{ /* Create corresponding SCB */
+ struct scatterlist *sglist;
+ struct sg_entry *sg; /* Pointer to SG list */
+ int i, nseg;
+ long total_len;
+ dma_addr_t dma_addr;
+
+ /* Fill in the command headers */
+ cblk->post = i91uSCBPost; /* i91u's callback routine */
+ cblk->srb = cmnd;
+ cblk->opcode = ExecSCSI;
+ cblk->flags = SCF_POST; /* After SCSI done, call post routine */
+ cblk->target = cmnd->device->id;
+ cblk->lun = cmnd->device->lun;
+ cblk->ident = cmnd->device->lun | DISC_ALLOW;
+
+ cblk->flags |= SCF_SENSE; /* Turn on auto request sense */
+
+ /* Map the sense buffer into bus memory */
+ dma_addr = dma_map_single(&host->pci_dev->dev, cmnd->sense_buffer,
+ SENSE_SIZE, DMA_FROM_DEVICE);
+ cblk->senseptr = (u32)dma_addr;
+ cblk->senselen = SENSE_SIZE;
+ cmnd->SCp.ptr = (char *)(unsigned long)dma_addr;
+ cblk->cdblen = cmnd->cmd_len;
+
+ /* Clear the returned status */
+ cblk->hastat = 0;
+ cblk->tastat = 0;
+ /* Command the command */
+ memcpy(cblk->cdb, cmnd->cmnd, cmnd->cmd_len);
+
+ /* Set up tags */
+ if (cmnd->device->tagged_supported) { /* Tag Support */
+ cblk->tagmsg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
+ } else {
+ cblk->tagmsg = 0; /* No tag support */
+ }
+
+ /* todo handle map_sg error */
+ nseg = scsi_dma_map(cmnd);
+ BUG_ON(nseg < 0);
+ if (nseg) {
+ dma_addr = dma_map_single(&host->pci_dev->dev, &cblk->sglist[0],
+ sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
+ DMA_BIDIRECTIONAL);
+ cblk->bufptr = (u32)dma_addr;
+ cmnd->SCp.dma_handle = dma_addr;
+
+ cblk->sglen = nseg;
+
+ cblk->flags |= SCF_SG; /* Turn on SG list flag */
+ total_len = 0;
+ sg = &cblk->sglist[0];
+ scsi_for_each_sg(cmnd, sglist, cblk->sglen, i) {
+ sg->data = cpu_to_le32((u32)sg_dma_address(sglist));
+ sg->len = cpu_to_le32((u32)sg_dma_len(sglist));
+ total_len += sg_dma_len(sglist);
+ ++sg;
+ }
+
+ cblk->buflen = (scsi_bufflen(cmnd) > total_len) ?
+ total_len : scsi_bufflen(cmnd);
+ } else { /* No data transfer required */
+ cblk->buflen = 0;
+ cblk->sglen = 0;
+ }
+}
+
+/**
+ * i91u_queuecommand - Queue a new command if possible
+ * @cmd: SCSI command block from the mid layer
+ * @done: Completion handler
+ *
+ * Attempts to queue a new command with the host adapter. Will return
+ * zero if successful or indicate a host busy condition if not (which
+ * will cause the mid layer to call us again later with the command)
+ */
+
+static int i91u_queuecommand_lck(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *))
+{
+ struct initio_host *host = (struct initio_host *) cmd->device->host->hostdata;
+ struct scsi_ctrl_blk *cmnd;
+
+ cmd->scsi_done = done;
+
+ cmnd = initio_alloc_scb(host);
+ if (!cmnd)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ initio_build_scb(host, cmnd, cmd);
+ initio_exec_scb(host, cmnd);
+ return 0;
+}
+
+static DEF_SCSI_QCMD(i91u_queuecommand)
+
+/**
+ * i91u_bus_reset - reset the SCSI bus
+ * @cmnd: Command block we want to trigger the reset for
+ *
+ * Initiate a SCSI bus reset sequence
+ */
+
+static int i91u_bus_reset(struct scsi_cmnd * cmnd)
+{
+ struct initio_host *host;
+
+ host = (struct initio_host *) cmnd->device->host->hostdata;
+
+ spin_lock_irq(cmnd->device->host->host_lock);
+ initio_reset_scsi(host, 0);
+ spin_unlock_irq(cmnd->device->host->host_lock);
+
+ return SUCCESS;
+}
+
+/**
+ * i91u_biospararm - return the "logical geometry
+ * @sdev: SCSI device
+ * @dev; Matching block device
+ * @capacity: Sector size of drive
+ * @info_array: Return space for BIOS geometry
+ *
+ * Map the device geometry in a manner compatible with the host
+ * controller BIOS behaviour.
+ *
+ * FIXME: limited to 2^32 sector devices.
+ */
+
+static int i91u_biosparam(struct scsi_device *sdev, struct block_device *dev,
+ sector_t capacity, int *info_array)
+{
+ struct initio_host *host; /* Point to Host adapter control block */
+ struct target_control *tc;
+
+ host = (struct initio_host *) sdev->host->hostdata;
+ tc = &host->targets[sdev->id];
+
+ if (tc->heads) {
+ info_array[0] = tc->heads;
+ info_array[1] = tc->sectors;
+ info_array[2] = (unsigned long)capacity / tc->heads / tc->sectors;
+ } else {
+ if (tc->drv_flags & TCF_DRV_255_63) {
+ info_array[0] = 255;
+ info_array[1] = 63;
+ info_array[2] = (unsigned long)capacity / 255 / 63;
+ } else {
+ info_array[0] = 64;
+ info_array[1] = 32;
+ info_array[2] = (unsigned long)capacity >> 11;
+ }
+ }
+
+#if defined(DEBUG_BIOSPARAM)
+ if (i91u_debug & debug_biosparam) {
+ printk("bios geometry: head=%d, sec=%d, cyl=%d\n",
+ info_array[0], info_array[1], info_array[2]);
+ printk("WARNING: check, if the bios geometry is correct.\n");
+ }
+#endif
+
+ return 0;
+}
+
+/**
+ * i91u_unmap_scb - Unmap a command
+ * @pci_dev: PCI device the command is for
+ * @cmnd: The command itself
+ *
+ * Unmap any PCI mapping/IOMMU resources allocated when the command
+ * was mapped originally as part of initio_build_scb
+ */
+
+static void i91u_unmap_scb(struct pci_dev *pci_dev, struct scsi_cmnd *cmnd)
+{
+ /* auto sense buffer */
+ if (cmnd->SCp.ptr) {
+ dma_unmap_single(&pci_dev->dev,
+ (dma_addr_t)((unsigned long)cmnd->SCp.ptr),
+ SENSE_SIZE, DMA_FROM_DEVICE);
+ cmnd->SCp.ptr = NULL;
+ }
+
+ /* request buffer */
+ if (scsi_sg_count(cmnd)) {
+ dma_unmap_single(&pci_dev->dev, cmnd->SCp.dma_handle,
+ sizeof(struct sg_entry) * TOTAL_SG_ENTRY,
+ DMA_BIDIRECTIONAL);
+
+ scsi_dma_unmap(cmnd);
+ }
+}
+
+/**
+ * i91uSCBPost - SCSI callback
+ * @host: Pointer to host adapter control block.
+ * @cmnd: Pointer to SCSI control block.
+ *
+ * This is callback routine be called when tulip finish one
+ * SCSI command.
+ */
+
+static void i91uSCBPost(u8 * host_mem, u8 * cblk_mem)
+{
+ struct scsi_cmnd *cmnd; /* Pointer to SCSI request block */
+ struct initio_host *host;
+ struct scsi_ctrl_blk *cblk;
+
+ host = (struct initio_host *) host_mem;
+ cblk = (struct scsi_ctrl_blk *) cblk_mem;
+ if ((cmnd = cblk->srb) == NULL) {
+ printk(KERN_ERR "i91uSCBPost: SRB pointer is empty\n");
+ WARN_ON(1);
+ initio_release_scb(host, cblk); /* Release SCB for current channel */
+ return;
+ }
+
+ /*
+ * Remap the firmware error status into a mid layer one
+ */
+ switch (cblk->hastat) {
+ case 0x0:
+ case 0xa: /* Linked command complete without error and linked normally */
+ case 0xb: /* Linked command complete without error interrupt generated */
+ cblk->hastat = 0;
+ break;
+
+ case 0x11: /* Selection time out-The initiator selection or target
+ reselection was not complete within the SCSI Time out period */
+ cblk->hastat = DID_TIME_OUT;
+ break;
+
+ case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus
+ phase sequence was requested by the target. The host adapter
+ will generate a SCSI Reset Condition, notifying the host with
+ a SCRD interrupt */
+ cblk->hastat = DID_RESET;
+ break;
+
+ case 0x1a: /* SCB Aborted. 07/21/98 */
+ cblk->hastat = DID_ABORT;
+ break;
+
+ case 0x12: /* Data overrun/underrun-The target attempted to transfer more data
+ than was allocated by the Data Length field or the sum of the
+ Scatter / Gather Data Length fields. */
+ case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */
+ case 0x16: /* Invalid SCB Operation Code. */
+
+ default:
+ printk("ini9100u: %x %x\n", cblk->hastat, cblk->tastat);
+ cblk->hastat = DID_ERROR; /* Couldn't find any better */
+ break;
+ }
+
+ cmnd->result = cblk->tastat | (cblk->hastat << 16);
+ i91u_unmap_scb(host->pci_dev, cmnd);
+ cmnd->scsi_done(cmnd); /* Notify system DONE */
+ initio_release_scb(host, cblk); /* Release SCB for current channel */
+}
+
+static struct scsi_host_template initio_template = {
+ .proc_name = "INI9100U",
+ .name = "Initio INI-9X00U/UW SCSI device driver",
+ .queuecommand = i91u_queuecommand,
+ .eh_bus_reset_handler = i91u_bus_reset,
+ .bios_param = i91u_biosparam,
+ .can_queue = MAX_TARGETS * i91u_MAXQUEUE,
+ .this_id = 1,
+ .sg_tablesize = SG_ALL,
+ .cmd_per_lun = 1,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+static int initio_probe_one(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ struct Scsi_Host *shost;
+ struct initio_host *host;
+ u32 reg;
+ u16 bios_seg;
+ struct scsi_ctrl_blk *scb, *tmp, *prev = NULL /* silence gcc */;
+ int num_scb, i, error;
+
+ error = pci_enable_device(pdev);
+ if (error)
+ return error;
+
+ pci_read_config_dword(pdev, 0x44, (u32 *) & reg);
+ bios_seg = (u16) (reg & 0xFF);
+ if (((reg & 0xFF00) >> 8) == 0xFF)
+ reg = 0;
+ bios_seg = (bios_seg << 8) + ((u16) ((reg & 0xFF00) >> 8));
+
+ if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+ printk(KERN_WARNING "i91u: Could not set 32 bit DMA mask\n");
+ error = -ENODEV;
+ goto out_disable_device;
+ }
+ shost = scsi_host_alloc(&initio_template, sizeof(struct initio_host));
+ if (!shost) {
+ printk(KERN_WARNING "initio: Could not allocate host structure.\n");
+ error = -ENOMEM;
+ goto out_disable_device;
+ }
+ host = (struct initio_host *)shost->hostdata;
+ memset(host, 0, sizeof(struct initio_host));
+ host->addr = pci_resource_start(pdev, 0);
+ host->bios_addr = bios_seg;
+
+ if (!request_region(host->addr, 256, "i91u")) {
+ printk(KERN_WARNING "initio: I/O port range 0x%x is busy.\n", host->addr);
+ error = -ENODEV;
+ goto out_host_put;
+ }
+
+ if (initio_tag_enable) /* 1.01i */
+ num_scb = MAX_TARGETS * i91u_MAXQUEUE;
+ else
+ num_scb = MAX_TARGETS + 3; /* 1-tape, 1-CD_ROM, 1- extra */
+
+ for (; num_scb >= MAX_TARGETS + 3; num_scb--) {
+ i = num_scb * sizeof(struct scsi_ctrl_blk);
+ if ((scb = kzalloc(i, GFP_DMA)) != NULL)
+ break;
+ }
+
+ if (!scb) {
+ printk(KERN_WARNING "initio: Cannot allocate SCB array.\n");
+ error = -ENOMEM;
+ goto out_release_region;
+ }
+
+ host->pci_dev = pdev;
+
+ host->semaph = 1;
+ spin_lock_init(&host->semaph_lock);
+ host->num_scbs = num_scb;
+ host->scb = scb;
+ host->next_pending = scb;
+ host->next_avail = scb;
+ for (i = 0, tmp = scb; i < num_scb; i++, tmp++) {
+ tmp->tagid = i;
+ if (i != 0)
+ prev->next = tmp;
+ prev = tmp;
+ }
+ prev->next = NULL;
+ host->scb_end = tmp;
+ host->first_avail = scb;
+ host->last_avail = prev;
+ spin_lock_init(&host->avail_lock);
+
+ initio_init(host, phys_to_virt(((u32)bios_seg << 4)));
+
+ host->jsstatus0 = 0;
+
+ shost->io_port = host->addr;
+ shost->n_io_port = 0xff;
+ shost->can_queue = num_scb; /* 03/05/98 */
+ shost->unique_id = host->addr;
+ shost->max_id = host->max_tar;
+ shost->max_lun = 32; /* 10/21/97 */
+ shost->irq = pdev->irq;
+ shost->this_id = host->scsi_id; /* Assign HCS index */
+ shost->base = host->addr;
+ shost->sg_tablesize = TOTAL_SG_ENTRY;
+
+ error = request_irq(pdev->irq, i91u_intr, IRQF_SHARED, "i91u", shost);
+ if (error < 0) {
+ printk(KERN_WARNING "initio: Unable to request IRQ %d\n", pdev->irq);
+ goto out_free_scbs;
+ }
+
+ pci_set_drvdata(pdev, shost);
+
+ error = scsi_add_host(shost, &pdev->dev);
+ if (error)
+ goto out_free_irq;
+ scsi_scan_host(shost);
+ return 0;
+out_free_irq:
+ free_irq(pdev->irq, shost);
+out_free_scbs:
+ kfree(host->scb);
+out_release_region:
+ release_region(host->addr, 256);
+out_host_put:
+ scsi_host_put(shost);
+out_disable_device:
+ pci_disable_device(pdev);
+ return error;
+}
+
+/**
+ * initio_remove_one - control shutdown
+ * @pdev: PCI device being released
+ *
+ * Release the resources assigned to this adapter after it has
+ * finished being used.
+ */
+
+static void initio_remove_one(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct initio_host *s = (struct initio_host *)host->hostdata;
+ scsi_remove_host(host);
+ free_irq(pdev->irq, host);
+ release_region(s->addr, 256);
+ scsi_host_put(host);
+ pci_disable_device(pdev);
+}
+
+MODULE_LICENSE("GPL");
+
+static struct pci_device_id initio_pci_tbl[] = {
+ {PCI_VENDOR_ID_INIT, 0x9500, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {PCI_VENDOR_ID_INIT, 0x9400, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {PCI_VENDOR_ID_INIT, 0x9401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {PCI_VENDOR_ID_INIT, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {PCI_VENDOR_ID_DOMEX, 0x0002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+ {0,}
+};
+MODULE_DEVICE_TABLE(pci, initio_pci_tbl);
+
+static struct pci_driver initio_pci_driver = {
+ .name = "initio",
+ .id_table = initio_pci_tbl,
+ .probe = initio_probe_one,
+ .remove = initio_remove_one,
+};
+
+static int __init initio_init_driver(void)
+{
+ return pci_register_driver(&initio_pci_driver);
+}
+
+static void __exit initio_exit_driver(void)
+{
+ pci_unregister_driver(&initio_pci_driver);
+}
+
+MODULE_DESCRIPTION("Initio INI-9X00U/UW SCSI device driver");
+MODULE_AUTHOR("Initio Corporation");
+MODULE_LICENSE("GPL");
+
+module_init(initio_init_driver);
+module_exit(initio_exit_driver);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-11 05:10:25 +0000