diff options
Diffstat (limited to 'drivers/scsi/qlogicpti.c')
| -rw-r--r-- | drivers/scsi/qlogicpti.c | 1541 |
1 files changed, 1541 insertions, 0 deletions
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c new file mode 100644 index 000000000000..a917ab7475ac --- /dev/null +++ b/drivers/scsi/qlogicpti.c @@ -0,0 +1,1541 @@ +/* qlogicpti.c: Performance Technologies QlogicISP sbus card driver. + * + * Copyright (C) 1996 David S. Miller (davem@caipfs.rutgers.edu) + * + * A lot of this driver was directly stolen from Erik H. Moe's PCI + * Qlogic ISP driver. Mucho kudos to him for this code. + * + * An even bigger kudos to John Grana at Performance Technologies + * for providing me with the hardware to write this driver, you rule + * John you really do. + * + * May, 2, 1997: Added support for QLGC,isp --jj + */ + +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/blkdev.h> +#include <linux/proc_fs.h> +#include <linux/stat.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/interrupt.h> +#include <linux/module.h> + +#include <asm/byteorder.h> + +#include "qlogicpti.h" + +#include <asm/sbus.h> +#include <asm/dma.h> +#include <asm/system.h> +#include <asm/ptrace.h> +#include <asm/pgtable.h> +#include <asm/oplib.h> +#include <asm/io.h> +#include <asm/irq.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_request.h> +#include <scsi/scsi_tcq.h> +#include <scsi/scsi_host.h> + + + +#define MAX_TARGETS 16 +#define MAX_LUNS 8 /* 32 for 1.31 F/W */ + +#define DEFAULT_LOOP_COUNT 10000 + +#include "qlogicpti_asm.c" + +static struct qlogicpti *qptichain = NULL; +static DEFINE_SPINLOCK(qptichain_lock); +static int qptis_running = 0; + +#define PACKB(a, b) (((a)<<4)|(b)) + +static const u_char mbox_param[] = { + PACKB(1, 1), /* MBOX_NO_OP */ + PACKB(5, 5), /* MBOX_LOAD_RAM */ + PACKB(2, 0), /* MBOX_EXEC_FIRMWARE */ + PACKB(5, 5), /* MBOX_DUMP_RAM */ + PACKB(3, 3), /* MBOX_WRITE_RAM_WORD */ + PACKB(2, 3), /* MBOX_READ_RAM_WORD */ + PACKB(6, 6), /* MBOX_MAILBOX_REG_TEST */ + PACKB(2, 3), /* MBOX_VERIFY_CHECKSUM */ + PACKB(1, 3), /* MBOX_ABOUT_FIRMWARE */ + PACKB(0, 0), /* 0x0009 */ + PACKB(0, 0), /* 0x000a */ + PACKB(0, 0), /* 0x000b */ + PACKB(0, 0), /* 0x000c */ + PACKB(0, 0), /* 0x000d */ + PACKB(1, 2), /* MBOX_CHECK_FIRMWARE */ + PACKB(0, 0), /* 0x000f */ + PACKB(5, 5), /* MBOX_INIT_REQ_QUEUE */ + PACKB(6, 6), /* MBOX_INIT_RES_QUEUE */ + PACKB(4, 4), /* MBOX_EXECUTE_IOCB */ + PACKB(2, 2), /* MBOX_WAKE_UP */ + PACKB(1, 6), /* MBOX_STOP_FIRMWARE */ + PACKB(4, 4), /* MBOX_ABORT */ + PACKB(2, 2), /* MBOX_ABORT_DEVICE */ + PACKB(3, 3), /* MBOX_ABORT_TARGET */ + PACKB(2, 2), /* MBOX_BUS_RESET */ + PACKB(2, 3), /* MBOX_STOP_QUEUE */ + PACKB(2, 3), /* MBOX_START_QUEUE */ + PACKB(2, 3), /* MBOX_SINGLE_STEP_QUEUE */ + PACKB(2, 3), /* MBOX_ABORT_QUEUE */ + PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_STATUS */ + PACKB(0, 0), /* 0x001e */ + PACKB(1, 3), /* MBOX_GET_FIRMWARE_STATUS */ + PACKB(1, 2), /* MBOX_GET_INIT_SCSI_ID */ + PACKB(1, 2), /* MBOX_GET_SELECT_TIMEOUT */ + PACKB(1, 3), /* MBOX_GET_RETRY_COUNT */ + PACKB(1, 2), /* MBOX_GET_TAG_AGE_LIMIT */ + PACKB(1, 2), /* MBOX_GET_CLOCK_RATE */ + PACKB(1, 2), /* MBOX_GET_ACT_NEG_STATE */ + PACKB(1, 2), /* MBOX_GET_ASYNC_DATA_SETUP_TIME */ + PACKB(1, 3), /* MBOX_GET_SBUS_PARAMS */ + PACKB(2, 4), /* MBOX_GET_TARGET_PARAMS */ + PACKB(2, 4), /* MBOX_GET_DEV_QUEUE_PARAMS */ + PACKB(0, 0), /* 0x002a */ + PACKB(0, 0), /* 0x002b */ + PACKB(0, 0), /* 0x002c */ + PACKB(0, 0), /* 0x002d */ + PACKB(0, 0), /* 0x002e */ + PACKB(0, 0), /* 0x002f */ + PACKB(2, 2), /* MBOX_SET_INIT_SCSI_ID */ + PACKB(2, 2), /* MBOX_SET_SELECT_TIMEOUT */ + PACKB(3, 3), /* MBOX_SET_RETRY_COUNT */ + PACKB(2, 2), /* MBOX_SET_TAG_AGE_LIMIT */ + PACKB(2, 2), /* MBOX_SET_CLOCK_RATE */ + PACKB(2, 2), /* MBOX_SET_ACTIVE_NEG_STATE */ + PACKB(2, 2), /* MBOX_SET_ASYNC_DATA_SETUP_TIME */ + PACKB(3, 3), /* MBOX_SET_SBUS_CONTROL_PARAMS */ + PACKB(4, 4), /* MBOX_SET_TARGET_PARAMS */ + PACKB(4, 4), /* MBOX_SET_DEV_QUEUE_PARAMS */ + PACKB(0, 0), /* 0x003a */ + PACKB(0, 0), /* 0x003b */ + PACKB(0, 0), /* 0x003c */ + PACKB(0, 0), /* 0x003d */ + PACKB(0, 0), /* 0x003e */ + PACKB(0, 0), /* 0x003f */ + PACKB(0, 0), /* 0x0040 */ + PACKB(0, 0), /* 0x0041 */ + PACKB(0, 0) /* 0x0042 */ +}; + +#define MAX_MBOX_COMMAND (sizeof(mbox_param)/sizeof(u_short)) + +/* queue length's _must_ be power of two: */ +#define QUEUE_DEPTH(in, out, ql) ((in - out) & (ql)) +#define REQ_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, \ + QLOGICPTI_REQ_QUEUE_LEN) +#define RES_QUEUE_DEPTH(in, out) QUEUE_DEPTH(in, out, RES_QUEUE_LEN) + +static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti) +{ + sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB, + qpti->qregs + SBUS_CTRL); +} + +static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti) +{ + sbus_writew(0, qpti->qregs + SBUS_CTRL); +} + +static inline void set_sbus_cfg1(struct qlogicpti *qpti) +{ + u16 val; + u8 bursts = qpti->bursts; + +#if 0 /* It appears that at least PTI cards do not support + * 64-byte bursts and that setting the B64 bit actually + * is a nop and the chip ends up using the smallest burst + * size. -DaveM + */ + if (sbus_can_burst64(qpti->sdev) && (bursts & DMA_BURST64)) { + val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64); + } else +#endif + if (bursts & DMA_BURST32) { + val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32); + } else if (bursts & DMA_BURST16) { + val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16); + } else if (bursts & DMA_BURST8) { + val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8); + } else { + val = 0; /* No sbus bursts for you... */ + } + sbus_writew(val, qpti->qregs + SBUS_CFG1); +} + +static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force) +{ + int loop_count; + u16 tmp; + + if (mbox_param[param[0]] == 0) + return 1; + + /* Set SBUS semaphore. */ + tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE); + tmp |= SBUS_SEMAPHORE_LCK; + sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE); + + /* Wait for host IRQ bit to clear. */ + loop_count = DEFAULT_LOOP_COUNT; + while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) { + barrier(); + cpu_relax(); + } + if (!loop_count) + printk(KERN_EMERG "qlogicpti: mbox_command loop timeout #1\n"); + + /* Write mailbox command registers. */ + switch (mbox_param[param[0]] >> 4) { + case 6: sbus_writew(param[5], qpti->qregs + MBOX5); + case 5: sbus_writew(param[4], qpti->qregs + MBOX4); + case 4: sbus_writew(param[3], qpti->qregs + MBOX3); + case 3: sbus_writew(param[2], qpti->qregs + MBOX2); + case 2: sbus_writew(param[1], qpti->qregs + MBOX1); + case 1: sbus_writew(param[0], qpti->qregs + MBOX0); + } + + /* Clear RISC interrupt. */ + tmp = sbus_readw(qpti->qregs + HCCTRL); + tmp |= HCCTRL_CRIRQ; + sbus_writew(tmp, qpti->qregs + HCCTRL); + + /* Clear SBUS semaphore. */ + sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE); + + /* Set HOST interrupt. */ + tmp = sbus_readw(qpti->qregs + HCCTRL); + tmp |= HCCTRL_SHIRQ; + sbus_writew(tmp, qpti->qregs + HCCTRL); + + /* Wait for HOST interrupt clears. */ + loop_count = DEFAULT_LOOP_COUNT; + while (--loop_count && + (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ)) + udelay(20); + if (!loop_count) + printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #2\n", + param[0]); + + /* Wait for SBUS semaphore to get set. */ + loop_count = DEFAULT_LOOP_COUNT; + while (--loop_count && + !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) { + udelay(20); + + /* Workaround for some buggy chips. */ + if (sbus_readw(qpti->qregs + MBOX0) & 0x4000) + break; + } + if (!loop_count) + printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #3\n", + param[0]); + + /* Wait for MBOX busy condition to go away. */ + loop_count = DEFAULT_LOOP_COUNT; + while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04)) + udelay(20); + if (!loop_count) + printk(KERN_EMERG "qlogicpti: mbox_command[%04x] loop timeout #4\n", + param[0]); + + /* Read back output parameters. */ + switch (mbox_param[param[0]] & 0xf) { + case 6: param[5] = sbus_readw(qpti->qregs + MBOX5); + case 5: param[4] = sbus_readw(qpti->qregs + MBOX4); + case 4: param[3] = sbus_readw(qpti->qregs + MBOX3); + case 3: param[2] = sbus_readw(qpti->qregs + MBOX2); + case 2: param[1] = sbus_readw(qpti->qregs + MBOX1); + case 1: param[0] = sbus_readw(qpti->qregs + MBOX0); + } + + /* Clear RISC interrupt. */ + tmp = sbus_readw(qpti->qregs + HCCTRL); + tmp |= HCCTRL_CRIRQ; + sbus_writew(tmp, qpti->qregs + HCCTRL); + + /* Release SBUS semaphore. */ + tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE); + tmp &= ~(SBUS_SEMAPHORE_LCK); + sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE); + + /* We're done. */ + return 0; +} + +static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti) +{ + int i; + + qpti->host_param.initiator_scsi_id = qpti->scsi_id; + qpti->host_param.bus_reset_delay = 3; + qpti->host_param.retry_count = 0; + qpti->host_param.retry_delay = 5; + qpti->host_param.async_data_setup_time = 3; + qpti->host_param.req_ack_active_negation = 1; + qpti->host_param.data_line_active_negation = 1; + qpti->host_param.data_dma_burst_enable = 1; + qpti->host_param.command_dma_burst_enable = 1; + qpti->host_param.tag_aging = 8; + qpti->host_param.selection_timeout = 250; + qpti->host_param.max_queue_depth = 256; + + for(i = 0; i < MAX_TARGETS; i++) { + /* + * disconnect, parity, arq, reneg on reset, and, oddly enough + * tags...the midlayer's notion of tagged support has to match + * our device settings, and since we base whether we enable a + * tag on a per-cmnd basis upon what the midlayer sez, we + * actually enable the capability here. + */ + qpti->dev_param[i].device_flags = 0xcd; + qpti->dev_param[i].execution_throttle = 16; + if (qpti->ultra) { + qpti->dev_param[i].synchronous_period = 12; + qpti->dev_param[i].synchronous_offset = 8; + } else { + qpti->dev_param[i].synchronous_period = 25; + qpti->dev_param[i].synchronous_offset = 12; + } + qpti->dev_param[i].device_enable = 1; + } + /* this is very important to set! */ + qpti->sbits = 1 << qpti->scsi_id; +} + +static int qlogicpti_reset_hardware(struct Scsi_Host *host) +{ + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + u_short param[6]; + unsigned short risc_code_addr; + int loop_count, i; + unsigned long flags; + + risc_code_addr = 0x1000; /* all load addresses are at 0x1000 */ + + spin_lock_irqsave(host->host_lock, flags); + + sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL); + + /* Only reset the scsi bus if it is not free. */ + if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) { + sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE); + sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD); + udelay(400); + } + + sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL); + sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL); + sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL); + + loop_count = DEFAULT_LOOP_COUNT; + while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04)) + udelay(20); + if (!loop_count) + printk(KERN_EMERG "qlogicpti: reset_hardware loop timeout\n"); + + sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL); + set_sbus_cfg1(qpti); + qlogicpti_enable_irqs(qpti); + + if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) { + qpti->ultra = 1; + sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA), + qpti->qregs + RISC_MTREG); + } else { + qpti->ultra = 0; + sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT), + qpti->qregs + RISC_MTREG); + } + + /* reset adapter and per-device default values. */ + /* do it after finding out whether we're ultra mode capable */ + qlogicpti_set_hostdev_defaults(qpti); + + /* Release the RISC processor. */ + sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL); + + /* Get RISC to start executing the firmware code. */ + param[0] = MBOX_EXEC_FIRMWARE; + param[1] = risc_code_addr; + if (qlogicpti_mbox_command(qpti, param, 1)) { + printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + /* Set initiator scsi ID. */ + param[0] = MBOX_SET_INIT_SCSI_ID; + param[1] = qpti->host_param.initiator_scsi_id; + if (qlogicpti_mbox_command(qpti, param, 1) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + /* Initialize state of the queues, both hw and sw. */ + qpti->req_in_ptr = qpti->res_out_ptr = 0; + + param[0] = MBOX_INIT_RES_QUEUE; + param[1] = RES_QUEUE_LEN + 1; + param[2] = (u_short) (qpti->res_dvma >> 16); + param[3] = (u_short) (qpti->res_dvma & 0xffff); + param[4] = param[5] = 0; + if (qlogicpti_mbox_command(qpti, param, 1)) { + printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + param[0] = MBOX_INIT_REQ_QUEUE; + param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1; + param[2] = (u_short) (qpti->req_dvma >> 16); + param[3] = (u_short) (qpti->req_dvma & 0xffff); + param[4] = param[5] = 0; + if (qlogicpti_mbox_command(qpti, param, 1)) { + printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + param[0] = MBOX_SET_RETRY_COUNT; + param[1] = qpti->host_param.retry_count; + param[2] = qpti->host_param.retry_delay; + qlogicpti_mbox_command(qpti, param, 0); + + param[0] = MBOX_SET_TAG_AGE_LIMIT; + param[1] = qpti->host_param.tag_aging; + qlogicpti_mbox_command(qpti, param, 0); + + for (i = 0; i < MAX_TARGETS; i++) { + param[0] = MBOX_GET_DEV_QUEUE_PARAMS; + param[1] = (i << 8); + qlogicpti_mbox_command(qpti, param, 0); + } + + param[0] = MBOX_GET_FIRMWARE_STATUS; + qlogicpti_mbox_command(qpti, param, 0); + + param[0] = MBOX_SET_SELECT_TIMEOUT; + param[1] = qpti->host_param.selection_timeout; + qlogicpti_mbox_command(qpti, param, 0); + + for (i = 0; i < MAX_TARGETS; i++) { + param[0] = MBOX_SET_TARGET_PARAMS; + param[1] = (i << 8); + param[2] = (qpti->dev_param[i].device_flags << 8); + /* + * Since we're now loading 1.31 f/w, force narrow/async. + */ + param[2] |= 0xc0; + param[3] = 0; /* no offset, we do not have sync mode yet */ + qlogicpti_mbox_command(qpti, param, 0); + } + + /* + * Always (sigh) do an initial bus reset (kicks f/w). + */ + param[0] = MBOX_BUS_RESET; + param[1] = qpti->host_param.bus_reset_delay; + qlogicpti_mbox_command(qpti, param, 0); + qpti->send_marker = 1; + + spin_unlock_irqrestore(host->host_lock, flags); + return 0; +} + +#define PTI_RESET_LIMIT 400 + +static int __init qlogicpti_load_firmware(struct qlogicpti *qpti) +{ + struct Scsi_Host *host = qpti->qhost; + unsigned short csum = 0; + unsigned short param[6]; + unsigned short *risc_code, risc_code_addr, risc_code_length; + unsigned long flags; + int i, timeout; + + risc_code = &sbus_risc_code01[0]; + risc_code_addr = 0x1000; /* all f/w modules load at 0x1000 */ + risc_code_length = sbus_risc_code_length01; + + spin_lock_irqsave(host->host_lock, flags); + + /* Verify the checksum twice, one before loading it, and once + * afterwards via the mailbox commands. + */ + for (i = 0; i < risc_code_length; i++) + csum += risc_code[i]; + if (csum) { + spin_unlock_irqrestore(host->host_lock, flags); + printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!", + qpti->qpti_id); + return 1; + } + sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL); + sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL); + sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL); + timeout = PTI_RESET_LIMIT; + while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET)) + udelay(20); + if (!timeout) { + spin_unlock_irqrestore(host->host_lock, flags); + printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id); + return 1; + } + + sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL); + mdelay(1); + + sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL); + set_sbus_cfg1(qpti); + sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE); + + if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) { + qpti->ultra = 1; + sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA), + qpti->qregs + RISC_MTREG); + } else { + qpti->ultra = 0; + sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT), + qpti->qregs + RISC_MTREG); + } + + sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL); + + /* Pin lines are only stable while RISC is paused. */ + sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL); + if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE) + qpti->differential = 1; + else + qpti->differential = 0; + sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL); + + /* This shouldn't be necessary- we've reset things so we should be + running from the ROM now.. */ + + param[0] = MBOX_STOP_FIRMWARE; + param[1] = param[2] = param[3] = param[4] = param[5] = 0; + if (qlogicpti_mbox_command(qpti, param, 1)) { + printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + /* Load it up.. */ + for (i = 0; i < risc_code_length; i++) { + param[0] = MBOX_WRITE_RAM_WORD; + param[1] = risc_code_addr + i; + param[2] = risc_code[i]; + if (qlogicpti_mbox_command(qpti, param, 1) || + param[0] != MBOX_COMMAND_COMPLETE) { + printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + } + + /* Reset the ISP again. */ + sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL); + mdelay(1); + + qlogicpti_enable_irqs(qpti); + sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE); + sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL); + + /* Ask ISP to verify the checksum of the new code. */ + param[0] = MBOX_VERIFY_CHECKSUM; + param[1] = risc_code_addr; + if (qlogicpti_mbox_command(qpti, param, 1) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + /* Start using newly downloaded firmware. */ + param[0] = MBOX_EXEC_FIRMWARE; + param[1] = risc_code_addr; + qlogicpti_mbox_command(qpti, param, 1); + + param[0] = MBOX_ABOUT_FIRMWARE; + if (qlogicpti_mbox_command(qpti, param, 1) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + /* Snag the major and minor revisions from the result. */ + qpti->fware_majrev = param[1]; + qpti->fware_minrev = param[2]; + qpti->fware_micrev = param[3]; + + /* Set the clock rate */ + param[0] = MBOX_SET_CLOCK_RATE; + param[1] = qpti->clock; + if (qlogicpti_mbox_command(qpti, param, 1) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n", + qpti->qpti_id); + spin_unlock_irqrestore(host->host_lock, flags); + return 1; + } + + if (qpti->is_pti != 0) { + /* Load scsi initiator ID and interrupt level into sbus static ram. */ + param[0] = MBOX_WRITE_RAM_WORD; + param[1] = 0xff80; + param[2] = (unsigned short) qpti->scsi_id; + qlogicpti_mbox_command(qpti, param, 1); + + param[0] = MBOX_WRITE_RAM_WORD; + param[1] = 0xff00; + param[2] = (unsigned short) 3; + qlogicpti_mbox_command(qpti, param, 1); + } + + spin_unlock_irqrestore(host->host_lock, flags); + return 0; +} + +static int qlogicpti_verify_tmon(struct qlogicpti *qpti) +{ + int curstat = sbus_readb(qpti->sreg); + + curstat &= 0xf0; + if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE)) + printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id); + if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER)) + printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id); + if (curstat != qpti->swsreg) { + int error = 0; + if (curstat & SREG_FUSE) { + error++; + printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id); + } + if (curstat & SREG_TPOWER) { + error++; + printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id); + } + if (qpti->differential && + (curstat & SREG_DSENSE) != SREG_DSENSE) { + error++; + printk("qlogicpti%d: You have a single ended device on a " + "differential bus! Please fix!\n", qpti->qpti_id); + } + qpti->swsreg = curstat; + return error; + } + return 0; +} + +static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs); + +static void __init qpti_chain_add(struct qlogicpti *qpti) +{ + spin_lock_irq(&qptichain_lock); + if (qptichain != NULL) { + struct qlogicpti *qlink = qptichain; + + while(qlink->next) + qlink = qlink->next; + qlink->next = qpti; + } else { + qptichain = qpti; + } + qpti->next = NULL; + spin_unlock_irq(&qptichain_lock); +} + +static void __init qpti_chain_del(struct qlogicpti *qpti) +{ + spin_lock_irq(&qptichain_lock); + if (qptichain == qpti) { + qptichain = qpti->next; + } else { + struct qlogicpti *qlink = qptichain; + while(qlink->next != qpti) + qlink = qlink->next; + qlink->next = qpti->next; + } + qpti->next = NULL; + spin_unlock_irq(&qptichain_lock); +} + +static int __init qpti_map_regs(struct qlogicpti *qpti) +{ + struct sbus_dev *sdev = qpti->sdev; + + qpti->qregs = sbus_ioremap(&sdev->resource[0], 0, + sdev->reg_addrs[0].reg_size, + "PTI Qlogic/ISP"); + if (!qpti->qregs) { + printk("PTI: Qlogic/ISP registers are unmappable\n"); + return -1; + } + if (qpti->is_pti) { + qpti->sreg = sbus_ioremap(&sdev->resource[0], (16 * 4096), + sizeof(unsigned char), + "PTI Qlogic/ISP statreg"); + if (!qpti->sreg) { + printk("PTI: Qlogic/ISP status register is unmappable\n"); + return -1; + } + } + return 0; +} + +static int __init qpti_register_irq(struct qlogicpti *qpti) +{ + struct sbus_dev *sdev = qpti->sdev; + + qpti->qhost->irq = qpti->irq = sdev->irqs[0]; + + /* We used to try various overly-clever things to + * reduce the interrupt processing overhead on + * sun4c/sun4m when multiple PTI's shared the + * same IRQ. It was too complex and messy to + * sanely maintain. + */ + if (request_irq(qpti->irq, qpti_intr, + SA_SHIRQ, "Qlogic/PTI", qpti)) + goto fail; + + printk("qpti%d: IRQ %s ", qpti->qpti_id, __irq_itoa(qpti->irq)); + + return 0; + +fail: + printk("qpti%d: Cannot acquire irq line\n", qpti->qpti_id); + return -1; +} + +static void __init qpti_get_scsi_id(struct qlogicpti *qpti) +{ + qpti->scsi_id = prom_getintdefault(qpti->prom_node, + "initiator-id", + -1); + if (qpti->scsi_id == -1) + qpti->scsi_id = prom_getintdefault(qpti->prom_node, + "scsi-initiator-id", + -1); + if (qpti->scsi_id == -1) + qpti->scsi_id = + prom_getintdefault(qpti->sdev->bus->prom_node, + "scsi-initiator-id", 7); + qpti->qhost->this_id = qpti->scsi_id; + qpti->qhost->max_sectors = 64; + + printk("SCSI ID %d ", qpti->scsi_id); +} + +static void qpti_get_bursts(struct qlogicpti *qpti) +{ + struct sbus_dev *sdev = qpti->sdev; + u8 bursts, bmask; + + bursts = prom_getintdefault(qpti->prom_node, "burst-sizes", 0xff); + bmask = prom_getintdefault(sdev->bus->prom_node, + "burst-sizes", 0xff); + if (bmask != 0xff) + bursts &= bmask; + if (bursts == 0xff || + (bursts & DMA_BURST16) == 0 || + (bursts & DMA_BURST32) == 0) + bursts = (DMA_BURST32 - 1); + + qpti->bursts = bursts; +} + +static void qpti_get_clock(struct qlogicpti *qpti) +{ + unsigned int cfreq; + + /* Check for what the clock input to this card is. + * Default to 40Mhz. + */ + cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000); + qpti->clock = (cfreq + 500000)/1000000; + if (qpti->clock == 0) /* bullshit */ + qpti->clock = 40; +} + +/* The request and response queues must each be aligned + * on a page boundary. + */ +static int __init qpti_map_queues(struct qlogicpti *qpti) +{ + struct sbus_dev *sdev = qpti->sdev; + +#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN) + qpti->res_cpu = sbus_alloc_consistent(sdev, + QSIZE(RES_QUEUE_LEN), + &qpti->res_dvma); + if (qpti->res_cpu == NULL || + qpti->res_dvma == 0) { + printk("QPTI: Cannot map response queue.\n"); + return -1; + } + + qpti->req_cpu = sbus_alloc_consistent(sdev, + QSIZE(QLOGICPTI_REQ_QUEUE_LEN), + &qpti->req_dvma); + if (qpti->req_cpu == NULL || + qpti->req_dvma == 0) { + sbus_free_consistent(sdev, QSIZE(RES_QUEUE_LEN), + qpti->res_cpu, qpti->res_dvma); + printk("QPTI: Cannot map request queue.\n"); + return -1; + } + memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN)); + memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN)); + return 0; +} + +/* Detect all PTI Qlogic ISP's in the machine. */ +static int __init qlogicpti_detect(struct scsi_host_template *tpnt) +{ + struct qlogicpti *qpti; + struct Scsi_Host *qpti_host; + struct sbus_bus *sbus; + struct sbus_dev *sdev; + int nqptis = 0, nqptis_in_use = 0; + + tpnt->proc_name = "qlogicpti"; + for_each_sbus(sbus) { + for_each_sbusdev(sdev, sbus) { + /* Is this a red snapper? */ + if (strcmp(sdev->prom_name, "ptisp") && + strcmp(sdev->prom_name, "PTI,ptisp") && + strcmp(sdev->prom_name, "QLGC,isp") && + strcmp(sdev->prom_name, "SUNW,isp")) + continue; + + /* Sometimes Antares cards come up not completely + * setup, and we get a report of a zero IRQ. + * Skip over them in such cases so we survive. + */ + if (sdev->irqs[0] == 0) { + printk("qpti%d: Adapter reports no interrupt, " + "skipping over this card.", nqptis); + continue; + } + + /* Yep, register and allocate software state. */ + qpti_host = scsi_register(tpnt, sizeof(struct qlogicpti)); + if (!qpti_host) { + printk("QPTI: Cannot register PTI Qlogic ISP SCSI host"); + continue; + } + qpti = (struct qlogicpti *) qpti_host->hostdata; + + /* We are wide capable, 16 targets. */ + qpti_host->max_id = MAX_TARGETS; + + /* Setup back pointers and misc. state. */ + qpti->qhost = qpti_host; + qpti->sdev = sdev; + qpti->qpti_id = nqptis++; + qpti->prom_node = sdev->prom_node; + prom_getstring(qpti->prom_node, "name", + qpti->prom_name, + sizeof(qpti->prom_name)); + + /* This is not correct, actually. There's a switch + * on the PTI cards that put them into "emulation" + * mode- i.e., report themselves as QLGC,isp + * instead of PTI,ptisp. The only real substantive + * difference between non-pti and pti cards is + * the tmon register. Which is possibly even + * there for Qlogic cards, but non-functional. + */ + qpti->is_pti = (strcmp (qpti->prom_name, "QLGC,isp") != 0); + + qpti_chain_add(qpti); + if (qpti_map_regs(qpti) < 0) + goto fail_unlink; + + if (qpti_register_irq(qpti) < 0) + goto fail_unmap_regs; + + qpti_get_scsi_id(qpti); + qpti_get_bursts(qpti); + qpti_get_clock(qpti); + + /* Clear out scsi_cmnd array. */ + memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots)); + + if (qpti_map_queues(qpti) < 0) + goto fail_free_irq; + + /* Load the firmware. */ + if (qlogicpti_load_firmware(qpti)) + goto fail_unmap_queues; + if (qpti->is_pti) { + /* Check the PTI status reg. */ + if (qlogicpti_verify_tmon(qpti)) + goto fail_unmap_queues; + } + + /* Reset the ISP and init res/req queues. */ + if (qlogicpti_reset_hardware(qpti_host)) + goto fail_unmap_queues; + + printk("(Firmware v%d.%d.%d)", qpti->fware_majrev, + qpti->fware_minrev, qpti->fware_micrev); + { + char buffer[60]; + + prom_getstring (qpti->prom_node, + "isp-fcode", buffer, 60); + if (buffer[0]) + printk("(Firmware %s)", buffer); + if (prom_getbool(qpti->prom_node, "differential")) + qpti->differential = 1; + } + + printk (" [%s Wide, using %s interface]\n", + (qpti->ultra ? "Ultra" : "Fast"), + (qpti->differential ? "differential" : "single ended")); + + nqptis_in_use++; + continue; + + fail_unmap_queues: +#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN) + sbus_free_consistent(qpti->sdev, + QSIZE(RES_QUEUE_LEN), + qpti->res_cpu, qpti->res_dvma); + sbus_free_consistent(qpti->sdev, + QSIZE(QLOGICPTI_REQ_QUEUE_LEN), + qpti->req_cpu, qpti->req_dvma); +#undef QSIZE + fail_free_irq: + free_irq(qpti->irq, qpti); + + fail_unmap_regs: + sbus_iounmap(qpti->qregs, + qpti->sdev->reg_addrs[0].reg_size); + if (qpti->is_pti) + sbus_iounmap(qpti->sreg, sizeof(unsigned char)); + fail_unlink: + qpti_chain_del(qpti); + scsi_unregister(qpti->qhost); + } + } + if (nqptis) + printk("QPTI: Total of %d PTI Qlogic/ISP hosts found, %d actually in use.\n", + nqptis, nqptis_in_use); + qptis_running = nqptis_in_use; + return nqptis; +} + +static int qlogicpti_release(struct Scsi_Host *host) +{ + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + + /* Remove visibility from IRQ handlers. */ + qpti_chain_del(qpti); + + /* Shut up the card. */ + sbus_writew(0, qpti->qregs + SBUS_CTRL); + + /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */ + free_irq(qpti->irq, qpti); + +#define QSIZE(entries) (((entries) + 1) * QUEUE_ENTRY_LEN) + sbus_free_consistent(qpti->sdev, + QSIZE(RES_QUEUE_LEN), + qpti->res_cpu, qpti->res_dvma); + sbus_free_consistent(qpti->sdev, + QSIZE(QLOGICPTI_REQ_QUEUE_LEN), + qpti->req_cpu, qpti->req_dvma); +#undef QSIZE + + sbus_iounmap(qpti->qregs, qpti->sdev->reg_addrs[0].reg_size); + if (qpti->is_pti) + sbus_iounmap(qpti->sreg, sizeof(unsigned char)); + + return 0; +} + +const char *qlogicpti_info(struct Scsi_Host *host) +{ + static char buf[80]; + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + + sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %s regs at %p", + __irq_itoa(qpti->qhost->irq), qpti->qregs); + return buf; +} + +/* I am a certified frobtronicist. */ +static inline void marker_frob(struct Command_Entry *cmd) +{ + struct Marker_Entry *marker = (struct Marker_Entry *) cmd; + + memset(marker, 0, sizeof(struct Marker_Entry)); + marker->hdr.entry_cnt = 1; + marker->hdr.entry_type = ENTRY_MARKER; + marker->modifier = SYNC_ALL; + marker->rsvd = 0; +} + +static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd, + struct qlogicpti *qpti) +{ + memset(cmd, 0, sizeof(struct Command_Entry)); + cmd->hdr.entry_cnt = 1; + cmd->hdr.entry_type = ENTRY_COMMAND; + cmd->target_id = Cmnd->device->id; + cmd->target_lun = Cmnd->device->lun; + cmd->cdb_length = Cmnd->cmd_len; + cmd->control_flags = 0; + if (Cmnd->device->tagged_supported) { + if (qpti->cmd_count[Cmnd->device->id] == 0) + qpti->tag_ages[Cmnd->device->id] = jiffies; + if ((jiffies - qpti->tag_ages[Cmnd->device->id]) > (5*HZ)) { + cmd->control_flags = CFLAG_ORDERED_TAG; + qpti->tag_ages[Cmnd->device->id] = jiffies; + } else + cmd->control_flags = CFLAG_SIMPLE_TAG; + } + if ((Cmnd->cmnd[0] == WRITE_6) || + (Cmnd->cmnd[0] == WRITE_10) || + (Cmnd->cmnd[0] == WRITE_12)) + cmd->control_flags |= CFLAG_WRITE; + else + cmd->control_flags |= CFLAG_READ; + cmd->time_out = 30; + memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len); +} + +/* Do it to it baby. */ +static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd, + struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr) +{ + struct dataseg *ds; + struct scatterlist *sg; + int i, n; + + if (Cmnd->use_sg) { + int sg_count; + + sg = (struct scatterlist *) Cmnd->buffer; + sg_count = sbus_map_sg(qpti->sdev, sg, Cmnd->use_sg, Cmnd->sc_data_direction); + + ds = cmd->dataseg; + cmd->segment_cnt = sg_count; + + /* Fill in first four sg entries: */ + n = sg_count; + if (n > 4) + n = 4; + for (i = 0; i < n; i++, sg++) { + ds[i].d_base = sg_dma_address(sg); + ds[i].d_count = sg_dma_len(sg); + } + sg_count -= 4; + while (sg_count > 0) { + struct Continuation_Entry *cont; + + ++cmd->hdr.entry_cnt; + cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr]; + in_ptr = NEXT_REQ_PTR(in_ptr); + if (in_ptr == out_ptr) + return -1; + + cont->hdr.entry_type = ENTRY_CONTINUATION; + cont->hdr.entry_cnt = 0; + cont->hdr.sys_def_1 = 0; + cont->hdr.flags = 0; + cont->reserved = 0; + ds = cont->dataseg; + n = sg_count; + if (n > 7) + n = 7; + for (i = 0; i < n; i++, sg++) { + ds[i].d_base = sg_dma_address(sg); + ds[i].d_count = sg_dma_len(sg); + } + sg_count -= n; + } + } else if (Cmnd->request_bufflen) { + Cmnd->SCp.ptr = (char *)(unsigned long) + sbus_map_single(qpti->sdev, + Cmnd->request_buffer, + Cmnd->request_bufflen, + Cmnd->sc_data_direction); + + cmd->dataseg[0].d_base = (u32) ((unsigned long)Cmnd->SCp.ptr); + cmd->dataseg[0].d_count = Cmnd->request_bufflen; + cmd->segment_cnt = 1; + } else { + cmd->dataseg[0].d_base = 0; + cmd->dataseg[0].d_count = 0; + cmd->segment_cnt = 1; /* Shouldn't this be 0? */ + } + + /* Committed, record Scsi_Cmd so we can find it later. */ + cmd->handle = in_ptr; + qpti->cmd_slots[in_ptr] = Cmnd; + + qpti->cmd_count[Cmnd->device->id]++; + sbus_writew(in_ptr, qpti->qregs + MBOX4); + qpti->req_in_ptr = in_ptr; + + return in_ptr; +} + +static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr) +{ + /* Temporary workaround until bug is found and fixed (one bug has been found + already, but fixing it makes things even worse) -jj */ + int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64; + host->can_queue = host->host_busy + num_free; + host->sg_tablesize = QLOGICPTI_MAX_SG(num_free); +} + +/* + * Until we scan the entire bus with inquiries, go throught this fella... + */ +static void ourdone(struct scsi_cmnd *Cmnd) +{ + struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata; + int tgt = Cmnd->device->id; + void (*done) (struct scsi_cmnd *); + + /* This grot added by DaveM, blame him for ugliness. + * The issue is that in the 2.3.x driver we use the + * host_scribble portion of the scsi command as a + * completion linked list at interrupt service time, + * so we have to store the done function pointer elsewhere. + */ + done = (void (*)(struct scsi_cmnd *)) + (((unsigned long) Cmnd->SCp.Message) +#ifdef __sparc_v9__ + | ((unsigned long) Cmnd->SCp.Status << 32UL) +#endif + ); + + if ((qpti->sbits & (1 << tgt)) == 0) { + int ok = host_byte(Cmnd->result) == DID_OK; + if (Cmnd->cmnd[0] == 0x12 && ok) { + unsigned char *iqd; + + if (Cmnd->use_sg != 0) + BUG(); + + iqd = ((unsigned char *)Cmnd->buffer); + + /* tags handled in midlayer */ + /* enable sync mode? */ + if (iqd[7] & 0x10) { + qpti->dev_param[tgt].device_flags |= 0x10; + } else { + qpti->dev_param[tgt].synchronous_offset = 0; + qpti->dev_param[tgt].synchronous_period = 0; + } + /* are we wide capable? */ + if (iqd[7] & 0x20) { + qpti->dev_param[tgt].device_flags |= 0x20; + } + qpti->sbits |= (1 << tgt); + } else if (!ok) { + qpti->sbits |= (1 << tgt); + } + } + done(Cmnd); +} + +static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *)); + +static int qlogicpti_queuecommand_slow(struct scsi_cmnd *Cmnd, + void (*done)(struct scsi_cmnd *)) +{ + struct qlogicpti *qpti = (struct qlogicpti *) Cmnd->device->host->hostdata; + + /* + * done checking this host adapter? + * If not, then rewrite the command + * to finish through ourdone so we + * can peek at Inquiry data results. + */ + if (qpti->sbits && qpti->sbits != 0xffff) { + /* See above about in ourdone this ugliness... */ + Cmnd->SCp.Message = ((unsigned long)done) & 0xffffffff; +#ifdef CONFIG_SPARC64 + Cmnd->SCp.Status = ((unsigned long)done >> 32UL) & 0xffffffff; +#endif + return qlogicpti_queuecommand(Cmnd, ourdone); + } + + /* + * We've peeked at all targets for this bus- time + * to set parameters for devices for real now. + */ + if (qpti->sbits == 0xffff) { + int i; + for(i = 0; i < MAX_TARGETS; i++) { + u_short param[6]; + param[0] = MBOX_SET_TARGET_PARAMS; + param[1] = (i << 8); + param[2] = (qpti->dev_param[i].device_flags << 8); + if (qpti->dev_param[i].device_flags & 0x10) { + param[3] = (qpti->dev_param[i].synchronous_offset << 8) | + qpti->dev_param[i].synchronous_period; + } else { + param[3] = 0; + } + (void) qlogicpti_mbox_command(qpti, param, 0); + } + /* + * set to zero so any traverse through ourdone + * doesn't start the whole process again, + */ + qpti->sbits = 0; + } + + /* check to see if we're done with all adapters... */ + for (qpti = qptichain; qpti != NULL; qpti = qpti->next) { + if (qpti->sbits) { + break; + } + } + + /* + * if we hit the end of the chain w/o finding adapters still + * capability-configuring, then we're done with all adapters + * and can rock on.. + */ + if (qpti == NULL) + Cmnd->device->host->hostt->queuecommand = qlogicpti_queuecommand; + + return qlogicpti_queuecommand(Cmnd, done); +} + +/* + * The middle SCSI layer ensures that queuecommand never gets invoked + * concurrently with itself or the interrupt handler (though the + * interrupt handler may call this routine as part of + * request-completion handling). + * + * "This code must fly." -davem + */ +static int qlogicpti_queuecommand(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *)) +{ + struct Scsi_Host *host = Cmnd->device->host; + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + struct Command_Entry *cmd; + u_int out_ptr; + int in_ptr; + + Cmnd->scsi_done = done; + + in_ptr = qpti->req_in_ptr; + cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr]; + out_ptr = sbus_readw(qpti->qregs + MBOX4); + in_ptr = NEXT_REQ_PTR(in_ptr); + if (in_ptr == out_ptr) + goto toss_command; + + if (qpti->send_marker) { + marker_frob(cmd); + qpti->send_marker = 0; + if (NEXT_REQ_PTR(in_ptr) == out_ptr) { + sbus_writew(in_ptr, qpti->qregs + MBOX4); + qpti->req_in_ptr = in_ptr; + goto toss_command; + } + cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr]; + in_ptr = NEXT_REQ_PTR(in_ptr); + } + cmd_frob(cmd, Cmnd, qpti); + if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1) + goto toss_command; + + update_can_queue(host, in_ptr, out_ptr); + + return 0; + +toss_command: + printk(KERN_EMERG "qlogicpti%d: request queue overflow\n", + qpti->qpti_id); + + /* Unfortunately, unless you use the new EH code, which + * we don't, the midlayer will ignore the return value, + * which is insane. We pick up the pieces like this. + */ + Cmnd->result = DID_BUS_BUSY; + done(Cmnd); + return 1; +} + +static int qlogicpti_return_status(struct Status_Entry *sts, int id) +{ + int host_status = DID_ERROR; + + switch (sts->completion_status) { + case CS_COMPLETE: + host_status = DID_OK; + break; + case CS_INCOMPLETE: + if (!(sts->state_flags & SF_GOT_BUS)) + host_status = DID_NO_CONNECT; + else if (!(sts->state_flags & SF_GOT_TARGET)) + host_status = DID_BAD_TARGET; + else if (!(sts->state_flags & SF_SENT_CDB)) + host_status = DID_ERROR; + else if (!(sts->state_flags & SF_TRANSFERRED_DATA)) + host_status = DID_ERROR; + else if (!(sts->state_flags & SF_GOT_STATUS)) + host_status = DID_ERROR; + else if (!(sts->state_flags & SF_GOT_SENSE)) + host_status = DID_ERROR; + break; + case CS_DMA_ERROR: + case CS_TRANSPORT_ERROR: + host_status = DID_ERROR; + break; + case CS_RESET_OCCURRED: + case CS_BUS_RESET: + host_status = DID_RESET; + break; + case CS_ABORTED: + host_status = DID_ABORT; + break; + case CS_TIMEOUT: + host_status = DID_TIME_OUT; + break; + case CS_DATA_OVERRUN: + case CS_COMMAND_OVERRUN: + case CS_STATUS_OVERRUN: + case CS_BAD_MESSAGE: + case CS_NO_MESSAGE_OUT: + case CS_EXT_ID_FAILED: + case CS_IDE_MSG_FAILED: + case CS_ABORT_MSG_FAILED: + case CS_NOP_MSG_FAILED: + case CS_PARITY_ERROR_MSG_FAILED: + case CS_DEVICE_RESET_MSG_FAILED: + case CS_ID_MSG_FAILED: + case CS_UNEXP_BUS_FREE: + host_status = DID_ERROR; + break; + case CS_DATA_UNDERRUN: + host_status = DID_OK; + break; + default: + printk(KERN_EMERG "qpti%d: unknown completion status 0x%04x\n", + id, sts->completion_status); + host_status = DID_ERROR; + break; + } + + return (sts->scsi_status & STATUS_MASK) | (host_status << 16); +} + +static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti) +{ + struct scsi_cmnd *Cmnd, *done_queue = NULL; + struct Status_Entry *sts; + u_int in_ptr, out_ptr; + + if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT)) + return NULL; + + in_ptr = sbus_readw(qpti->qregs + MBOX5); + sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL); + if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) { + switch (sbus_readw(qpti->qregs + MBOX0)) { + case ASYNC_SCSI_BUS_RESET: + case EXECUTION_TIMEOUT_RESET: + qpti->send_marker = 1; + break; + case INVALID_COMMAND: + case HOST_INTERFACE_ERROR: + case COMMAND_ERROR: + case COMMAND_PARAM_ERROR: + break; + }; + sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE); + } + + /* This looks like a network driver! */ + out_ptr = qpti->res_out_ptr; + while (out_ptr != in_ptr) { + u_int cmd_slot; + + sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr]; + out_ptr = NEXT_RES_PTR(out_ptr); + + /* We store an index in the handle, not the pointer in + * some form. This avoids problems due to the fact + * that the handle provided is only 32-bits. -DaveM + */ + cmd_slot = sts->handle; + Cmnd = qpti->cmd_slots[cmd_slot]; + qpti->cmd_slots[cmd_slot] = NULL; + + if (sts->completion_status == CS_RESET_OCCURRED || + sts->completion_status == CS_ABORTED || + (sts->status_flags & STF_BUS_RESET)) + qpti->send_marker = 1; + + if (sts->state_flags & SF_GOT_SENSE) + memcpy(Cmnd->sense_buffer, sts->req_sense_data, + sizeof(Cmnd->sense_buffer)); + + if (sts->hdr.entry_type == ENTRY_STATUS) + Cmnd->result = + qlogicpti_return_status(sts, qpti->qpti_id); + else + Cmnd->result = DID_ERROR << 16; + + if (Cmnd->use_sg) { + sbus_unmap_sg(qpti->sdev, + (struct scatterlist *)Cmnd->buffer, + Cmnd->use_sg, + Cmnd->sc_data_direction); + } else { + sbus_unmap_single(qpti->sdev, + (__u32)((unsigned long)Cmnd->SCp.ptr), + Cmnd->request_bufflen, + Cmnd->sc_data_direction); + } + qpti->cmd_count[Cmnd->device->id]--; + sbus_writew(out_ptr, qpti->qregs + MBOX5); + Cmnd->host_scribble = (unsigned char *) done_queue; + done_queue = Cmnd; + } + qpti->res_out_ptr = out_ptr; + + return done_queue; +} + +static irqreturn_t qpti_intr(int irq, void *dev_id, struct pt_regs *regs) +{ + struct qlogicpti *qpti = dev_id; + unsigned long flags; + struct scsi_cmnd *dq; + + spin_lock_irqsave(qpti->qhost->host_lock, flags); + dq = qlogicpti_intr_handler(qpti); + + if (dq != NULL) { + do { + struct scsi_cmnd *next; + + next = (struct scsi_cmnd *) dq->host_scribble; + dq->scsi_done(dq); + dq = next; + } while (dq != NULL); + } + spin_unlock_irqrestore(qpti->qhost->host_lock, flags); + + return IRQ_HANDLED; +} + +static int qlogicpti_abort(struct scsi_cmnd *Cmnd) +{ + u_short param[6]; + struct Scsi_Host *host = Cmnd->device->host; + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + int return_status = SUCCESS; + u32 cmd_cookie; + int i; + + printk(KERN_WARNING "qlogicpti : Aborting cmd for tgt[%d] lun[%d]\n", + (int)Cmnd->device->id, (int)Cmnd->device->lun); + + qlogicpti_disable_irqs(qpti); + + /* Find the 32-bit cookie we gave to the firmware for + * this command. + */ + for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++) + if (qpti->cmd_slots[i] == Cmnd) + break; + cmd_cookie = i; + + param[0] = MBOX_ABORT; + param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun; + param[2] = cmd_cookie >> 16; + param[3] = cmd_cookie & 0xffff; + if (qlogicpti_mbox_command(qpti, param, 0) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicpti : scsi abort failure: %x\n", param[0]); + return_status = FAILED; + } + + qlogicpti_enable_irqs(qpti); + + return return_status; +} + +static int qlogicpti_reset(struct scsi_cmnd *Cmnd) +{ + u_short param[6]; + struct Scsi_Host *host = Cmnd->device->host; + struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata; + int return_status = SUCCESS; + + printk(KERN_WARNING "qlogicpti : Resetting SCSI bus!\n"); + + qlogicpti_disable_irqs(qpti); + + param[0] = MBOX_BUS_RESET; + param[1] = qpti->host_param.bus_reset_delay; + if (qlogicpti_mbox_command(qpti, param, 0) || + (param[0] != MBOX_COMMAND_COMPLETE)) { + printk(KERN_EMERG "qlogicisp : scsi bus reset failure: %x\n", param[0]); + return_status = FAILED; + } + + qlogicpti_enable_irqs(qpti); + + return return_status; +} + +static struct scsi_host_template driver_template = { + .detect = qlogicpti_detect, + .release = qlogicpti_release, + .info = qlogicpti_info, + .queuecommand = qlogicpti_queuecommand_slow, + .eh_abort_handler = qlogicpti_abort, + .eh_bus_reset_handler = qlogicpti_reset, + .can_queue = QLOGICPTI_REQ_QUEUE_LEN, + .this_id = 7, + .sg_tablesize = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN), + .cmd_per_lun = 1, + .use_clustering = ENABLE_CLUSTERING, +}; + + +#include "scsi_module.c" + +MODULE_LICENSE("GPL"); + |