--- /dev/null
+/*
+ * SuperTrak EX Series Storage Controller driver for Linux
+ *
+ * Copyright (C) 2005-2009 Promise Technology Inc.
+ *
+ * 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 of the License, or (at your option) any later version.
+ *
+ * Written By:
+ * Ed Lin <promise_linux@promise.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/pci.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/byteorder.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_dbg.h>
+#include <scsi/scsi_eh.h>
+
+#define DRV_NAME "stex"
+#define ST_DRIVER_VERSION "4.6.0000.4"
+#define ST_VER_MAJOR 4
+#define ST_VER_MINOR 6
+#define ST_OEM 0
+#define ST_BUILD_VER 4
+
+enum {
+ /* MU register offset */
+ IMR0 = 0x10, /* MU_INBOUND_MESSAGE_REG0 */
+ IMR1 = 0x14, /* MU_INBOUND_MESSAGE_REG1 */
+ OMR0 = 0x18, /* MU_OUTBOUND_MESSAGE_REG0 */
+ OMR1 = 0x1c, /* MU_OUTBOUND_MESSAGE_REG1 */
+ IDBL = 0x20, /* MU_INBOUND_DOORBELL */
+ IIS = 0x24, /* MU_INBOUND_INTERRUPT_STATUS */
+ IIM = 0x28, /* MU_INBOUND_INTERRUPT_MASK */
+ ODBL = 0x2c, /* MU_OUTBOUND_DOORBELL */
+ OIS = 0x30, /* MU_OUTBOUND_INTERRUPT_STATUS */
+ OIM = 0x3c, /* MU_OUTBOUND_INTERRUPT_MASK */
+
+ YIOA_STATUS = 0x00,
+ YH2I_INT = 0x20,
+ YINT_EN = 0x34,
+ YI2H_INT = 0x9c,
+ YI2H_INT_C = 0xa0,
+ YH2I_REQ = 0xc0,
+ YH2I_REQ_HI = 0xc4,
+
+ /* MU register value */
+ MU_INBOUND_DOORBELL_HANDSHAKE = (1 << 0),
+ MU_INBOUND_DOORBELL_REQHEADCHANGED = (1 << 1),
+ MU_INBOUND_DOORBELL_STATUSTAILCHANGED = (1 << 2),
+ MU_INBOUND_DOORBELL_HMUSTOPPED = (1 << 3),
+ MU_INBOUND_DOORBELL_RESET = (1 << 4),
+
+ MU_OUTBOUND_DOORBELL_HANDSHAKE = (1 << 0),
+ MU_OUTBOUND_DOORBELL_REQUESTTAILCHANGED = (1 << 1),
+ MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED = (1 << 2),
+ MU_OUTBOUND_DOORBELL_BUSCHANGE = (1 << 3),
+ MU_OUTBOUND_DOORBELL_HASEVENT = (1 << 4),
+ MU_OUTBOUND_DOORBELL_REQUEST_RESET = (1 << 27),
+
+ /* MU status code */
+ MU_STATE_STARTING = 1,
+ MU_STATE_STARTED = 2,
+ MU_STATE_RESETTING = 3,
+ MU_STATE_FAILED = 4,
+
+ MU_MAX_DELAY = 120,
+ MU_HANDSHAKE_SIGNATURE = 0x55aaaa55,
+ MU_HANDSHAKE_SIGNATURE_HALF = 0x5a5a0000,
+ MU_HARD_RESET_WAIT = 30000,
+ HMU_PARTNER_TYPE = 2,
+
+ /* firmware returned values */
+ SRB_STATUS_SUCCESS = 0x01,
+ SRB_STATUS_ERROR = 0x04,
+ SRB_STATUS_BUSY = 0x05,
+ SRB_STATUS_INVALID_REQUEST = 0x06,
+ SRB_STATUS_SELECTION_TIMEOUT = 0x0A,
+ SRB_SEE_SENSE = 0x80,
+
+ /* task attribute */
+ TASK_ATTRIBUTE_SIMPLE = 0x0,
+ TASK_ATTRIBUTE_HEADOFQUEUE = 0x1,
+ TASK_ATTRIBUTE_ORDERED = 0x2,
+ TASK_ATTRIBUTE_ACA = 0x4,
+
+ SS_STS_NORMAL = 0x80000000,
+ SS_STS_DONE = 0x40000000,
+ SS_STS_HANDSHAKE = 0x20000000,
+
+ SS_HEAD_HANDSHAKE = 0x80,
+
+ SS_H2I_INT_RESET = 0x100,
+
+ SS_I2H_REQUEST_RESET = 0x2000,
+
+ SS_MU_OPERATIONAL = 0x80000000,
+
+ STEX_CDB_LENGTH = 16,
+ STATUS_VAR_LEN = 128,
+
+ /* sg flags */
+ SG_CF_EOT = 0x80, /* end of table */
+ SG_CF_64B = 0x40, /* 64 bit item */
+ SG_CF_HOST = 0x20, /* sg in host memory */
+ MSG_DATA_DIR_ND = 0,
+ MSG_DATA_DIR_IN = 1,
+ MSG_DATA_DIR_OUT = 2,
+
+ st_shasta = 0,
+ st_vsc = 1,
+ st_yosemite = 2,
+ st_seq = 3,
+ st_yel = 4,
+
+ PASSTHRU_REQ_TYPE = 0x00000001,
+ PASSTHRU_REQ_NO_WAKEUP = 0x00000100,
+ ST_INTERNAL_TIMEOUT = 180,
+
+ ST_TO_CMD = 0,
+ ST_FROM_CMD = 1,
+
+ /* vendor specific commands of Promise */
+ MGT_CMD = 0xd8,
+ SINBAND_MGT_CMD = 0xd9,
+ ARRAY_CMD = 0xe0,
+ CONTROLLER_CMD = 0xe1,
+ DEBUGGING_CMD = 0xe2,
+ PASSTHRU_CMD = 0xe3,
+
+ PASSTHRU_GET_ADAPTER = 0x05,
+ PASSTHRU_GET_DRVVER = 0x10,
+
+ CTLR_CONFIG_CMD = 0x03,
+ CTLR_SHUTDOWN = 0x0d,
+
+ CTLR_POWER_STATE_CHANGE = 0x0e,
+ CTLR_POWER_SAVING = 0x01,
+
+ PASSTHRU_SIGNATURE = 0x4e415041,
+ MGT_CMD_SIGNATURE = 0xba,
+
+ INQUIRY_EVPD = 0x01,
+
+ ST_ADDITIONAL_MEM = 0x200000,
+ ST_ADDITIONAL_MEM_MIN = 0x80000,
+};
+
+struct st_sgitem {
+ u8 ctrl; /* SG_CF_xxx */
+ u8 reserved[3];
+ __le32 count;
+ __le64 addr;
+};
+
+struct st_ss_sgitem {
+ __le32 addr;
+ __le32 addr_hi;
+ __le32 count;
+};
+
+struct st_sgtable {
+ __le16 sg_count;
+ __le16 max_sg_count;
+ __le32 sz_in_byte;
+};
+
+struct st_msg_header {
+ __le64 handle;
+ u8 flag;
+ u8 channel;
+ __le16 timeout;
+ u32 reserved;
+};
+
+struct handshake_frame {
+ __le64 rb_phy; /* request payload queue physical address */
+ __le16 req_sz; /* size of each request payload */
+ __le16 req_cnt; /* count of reqs the buffer can hold */
+ __le16 status_sz; /* size of each status payload */
+ __le16 status_cnt; /* count of status the buffer can hold */
+ __le64 hosttime; /* seconds from Jan 1, 1970 (GMT) */
+ u8 partner_type; /* who sends this frame */
+ u8 reserved0[7];
+ __le32 partner_ver_major;
+ __le32 partner_ver_minor;
+ __le32 partner_ver_oem;
+ __le32 partner_ver_build;
+ __le32 extra_offset; /* NEW */
+ __le32 extra_size; /* NEW */
+ __le32 scratch_size;
+ u32 reserved1;
+};
+
+struct req_msg {
+ __le16 tag;
+ u8 lun;
+ u8 target;
+ u8 task_attr;
+ u8 task_manage;
+ u8 data_dir;
+ u8 payload_sz; /* payload size in 4-byte, not used */
+ u8 cdb[STEX_CDB_LENGTH];
+ u32 variable[0];
+};
+
+struct status_msg {
+ __le16 tag;
+ u8 lun;
+ u8 target;
+ u8 srb_status;
+ u8 scsi_status;
+ u8 reserved;
+ u8 payload_sz; /* payload size in 4-byte */
+ u8 variable[STATUS_VAR_LEN];
+};
+
+struct ver_info {
+ u32 major;
+ u32 minor;
+ u32 oem;
+ u32 build;
+ u32 reserved[2];
+};
+
+struct st_frame {
+ u32 base[6];
+ u32 rom_addr;
+
+ struct ver_info drv_ver;
+ struct ver_info bios_ver;
+
+ u32 bus;
+ u32 slot;
+ u32 irq_level;
+ u32 irq_vec;
+ u32 id;
+ u32 subid;
+
+ u32 dimm_size;
+ u8 dimm_type;
+ u8 reserved[3];
+
+ u32 channel;
+ u32 reserved1;
+};
+
+struct st_drvver {
+ u32 major;
+ u32 minor;
+ u32 oem;
+ u32 build;
+ u32 signature[2];
+ u8 console_id;
+ u8 host_no;
+ u8 reserved0[2];
+ u32 reserved[3];
+};
+
+struct st_ccb {
+ struct req_msg *req;
+ struct scsi_cmnd *cmd;
+
+ void *sense_buffer;
+ unsigned int sense_bufflen;
+ int sg_count;
+
+ u32 req_type;
+ u8 srb_status;
+ u8 scsi_status;
+ u8 reserved[2];
+};
+
+struct st_hba {
+ void __iomem *mmio_base; /* iomapped PCI memory space */
+ void *dma_mem;
+ dma_addr_t dma_handle;
+ size_t dma_size;
+
+ struct Scsi_Host *host;
+ struct pci_dev *pdev;
+
+ struct req_msg * (*alloc_rq) (struct st_hba *);
+ int (*map_sg)(struct st_hba *, struct req_msg *, struct st_ccb *);
+ void (*send) (struct st_hba *, struct req_msg *, u16);
+
+ u32 req_head;
+ u32 req_tail;
+ u32 status_head;
+ u32 status_tail;
+
+ struct status_msg *status_buffer;
+ void *copy_buffer; /* temp buffer for driver-handled commands */
+ struct st_ccb *ccb;
+ struct st_ccb *wait_ccb;
+ __le32 *scratch;
+
+ char work_q_name[20];
+ struct workqueue_struct *work_q;
+ struct work_struct reset_work;
+ wait_queue_head_t reset_waitq;
+ unsigned int mu_status;
+ unsigned int cardtype;
+ int msi_enabled;
+ int out_req_cnt;
+ u32 extra_offset;
+ u16 rq_count;
+ u16 rq_size;
+ u16 sts_count;
+};
+
+struct st_card_info {
+ struct req_msg * (*alloc_rq) (struct st_hba *);
+ int (*map_sg)(struct st_hba *, struct req_msg *, struct st_ccb *);
+ void (*send) (struct st_hba *, struct req_msg *, u16);
+ unsigned int max_id;
+ unsigned int max_lun;
+ unsigned int max_channel;
+ u16 rq_count;
+ u16 rq_size;
+ u16 sts_count;
+};
+
+static int msi;
+module_param(msi, int, 0);
+MODULE_PARM_DESC(msi, "Enable Message Signaled Interrupts(0=off, 1=on)");
+
+static const char console_inq_page[] =
+{
+ 0x03,0x00,0x03,0x03,0xFA,0x00,0x00,0x30,
+ 0x50,0x72,0x6F,0x6D,0x69,0x73,0x65,0x20, /* "Promise " */
+ 0x52,0x41,0x49,0x44,0x20,0x43,0x6F,0x6E, /* "RAID Con" */
+ 0x73,0x6F,0x6C,0x65,0x20,0x20,0x20,0x20, /* "sole " */
+ 0x31,0x2E,0x30,0x30,0x20,0x20,0x20,0x20, /* "1.00 " */
+ 0x53,0x58,0x2F,0x52,0x53,0x41,0x46,0x2D, /* "SX/RSAF-" */
+ 0x54,0x45,0x31,0x2E,0x30,0x30,0x20,0x20, /* "TE1.00 " */
+ 0x0C,0x20,0x20,0x20,0x20,0x20,0x20,0x20
+};
+
+MODULE_AUTHOR("Ed Lin");
+MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(ST_DRIVER_VERSION);
+
+static void stex_gettime(__le64 *time)
+{
+ struct timeval tv;
+
+ do_gettimeofday(&tv);
+ *time = cpu_to_le64(tv.tv_sec);
+}
+
+static struct status_msg *stex_get_status(struct st_hba *hba)
+{
+ struct status_msg *status = hba->status_buffer + hba->status_tail;
+
+ ++hba->status_tail;
+ hba->status_tail %= hba->sts_count+1;
+
+ return status;
+}
+
+static void stex_invalid_field(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *))
+{
+ cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
+
+ /* "Invalid field in cdb" */
+ scsi_build_sense_buffer(0, cmd->sense_buffer, ILLEGAL_REQUEST, 0x24,
+ 0x0);
+ done(cmd);
+}
+
+static struct req_msg *stex_alloc_req(struct st_hba *hba)
+{
+ struct req_msg *req = hba->dma_mem + hba->req_head * hba->rq_size;
+
+ ++hba->req_head;
+ hba->req_head %= hba->rq_count+1;
+
+ return req;
+}
+
+static struct req_msg *stex_ss_alloc_req(struct st_hba *hba)
+{
+ return (struct req_msg *)(hba->dma_mem +
+ hba->req_head * hba->rq_size + sizeof(struct st_msg_header));
+}
+
+static int stex_map_sg(struct st_hba *hba,
+ struct req_msg *req, struct st_ccb *ccb)
+{
+ struct scsi_cmnd *cmd;
+ struct scatterlist *sg;
+ struct st_sgtable *dst;
+ struct st_sgitem *table;
+ int i, nseg;
+
+ cmd = ccb->cmd;
+ nseg = scsi_dma_map(cmd);
+ BUG_ON(nseg < 0);
+ if (nseg) {
+ dst = (struct st_sgtable *)req->variable;
+
+ ccb->sg_count = nseg;
+ dst->sg_count = cpu_to_le16((u16)nseg);
+ dst->max_sg_count = cpu_to_le16(hba->host->sg_tablesize);
+ dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));
+
+ table = (struct st_sgitem *)(dst + 1);
+ scsi_for_each_sg(cmd, sg, nseg, i) {
+ table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
+ table[i].addr = cpu_to_le64(sg_dma_address(sg));
+ table[i].ctrl = SG_CF_64B | SG_CF_HOST;
+ }
+ table[--i].ctrl |= SG_CF_EOT;
+ }
+
+ return nseg;
+}
+
+static int stex_ss_map_sg(struct st_hba *hba,
+ struct req_msg *req, struct st_ccb *ccb)
+{
+ struct scsi_cmnd *cmd;
+ struct scatterlist *sg;
+ struct st_sgtable *dst;
+ struct st_ss_sgitem *table;
+ int i, nseg;
+
+ cmd = ccb->cmd;
+ nseg = scsi_dma_map(cmd);
+ BUG_ON(nseg < 0);
+ if (nseg) {
+ dst = (struct st_sgtable *)req->variable;
+
+ ccb->sg_count = nseg;
+ dst->sg_count = cpu_to_le16((u16)nseg);
+ dst->max_sg_count = cpu_to_le16(hba->host->sg_tablesize);
+ dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));
+
+ table = (struct st_ss_sgitem *)(dst + 1);
+ scsi_for_each_sg(cmd, sg, nseg, i) {
+ table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
+ table[i].addr =
+ cpu_to_le32(sg_dma_address(sg) & 0xffffffff);
+ table[i].addr_hi =
+ cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
+ }
+ }
+
+ return nseg;
+}
+
+static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
+{
+ struct st_frame *p;
+ size_t count = sizeof(struct st_frame);
+
+ p = hba->copy_buffer;
+ scsi_sg_copy_to_buffer(ccb->cmd, p, count);
+ memset(p->base, 0, sizeof(u32)*6);
+ *(unsigned long *)(p->base) = pci_resource_start(hba->pdev, 0);
+ p->rom_addr = 0;
+
+ p->drv_ver.major = ST_VER_MAJOR;
+ p->drv_ver.minor = ST_VER_MINOR;
+ p->drv_ver.oem = ST_OEM;
+ p->drv_ver.build = ST_BUILD_VER;
+
+ p->bus = hba->pdev->bus->number;
+ p->slot = hba->pdev->devfn;
+ p->irq_level = 0;
+ p->irq_vec = hba->pdev->irq;
+ p->id = hba->pdev->vendor << 16 | hba->pdev->device;
+ p->subid =
+ hba->pdev->subsystem_vendor << 16 | hba->pdev->subsystem_device;
+
+ scsi_sg_copy_from_buffer(ccb->cmd, p, count);
+}
+
+static void
+stex_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)
+{
+ req->tag = cpu_to_le16(tag);
+
+ hba->ccb[tag].req = req;
+ hba->out_req_cnt++;
+
+ writel(hba->req_head, hba->mmio_base + IMR0);
+ writel(MU_INBOUND_DOORBELL_REQHEADCHANGED, hba->mmio_base + IDBL);
+ readl(hba->mmio_base + IDBL); /* flush */
+}
+
+static void
+stex_ss_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)
+{
+ struct scsi_cmnd *cmd;
+ struct st_msg_header *msg_h;
+ dma_addr_t addr;
+
+ req->tag = cpu_to_le16(tag);
+
+ hba->ccb[tag].req = req;
+ hba->out_req_cnt++;
+
+ cmd = hba->ccb[tag].cmd;
+ msg_h = (struct st_msg_header *)req - 1;
+ if (likely(cmd)) {
+ msg_h->channel = (u8)cmd->device->channel;
+ msg_h->timeout = cpu_to_le16(cmd->request->timeout/HZ);
+ }
+ addr = hba->dma_handle + hba->req_head * hba->rq_size;
+ addr += (hba->ccb[tag].sg_count+4)/11;
+ msg_h->handle = cpu_to_le64(addr);
+
+ ++hba->req_head;
+ hba->req_head %= hba->rq_count+1;
+
+ writel((addr >> 16) >> 16, hba->mmio_base + YH2I_REQ_HI);
+ readl(hba->mmio_base + YH2I_REQ_HI); /* flush */
+ writel(addr, hba->mmio_base + YH2I_REQ);
+ readl(hba->mmio_base + YH2I_REQ); /* flush */
+}
+
+static int
+stex_slave_config(struct scsi_device *sdev)
+{
+ sdev->use_10_for_rw = 1;
+ sdev->use_10_for_ms = 1;
+ blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
+
+ return 0;
+}
+
+static int
+stex_queuecommand_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
+{
+ struct st_hba *hba;
+ struct Scsi_Host *host;
+ unsigned int id, lun;
+ struct req_msg *req;
+ u16 tag;
+
+ host = cmd->device->host;
+ id = cmd->device->id;
+ lun = cmd->device->lun;
+ hba = (struct st_hba *) &host->hostdata[0];
+
+ if (unlikely(hba->mu_status == MU_STATE_RESETTING))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ switch (cmd->cmnd[0]) {
+ case MODE_SENSE_10:
+ {
+ static char ms10_caching_page[12] =
+ { 0, 0x12, 0, 0, 0, 0, 0, 0, 0x8, 0xa, 0x4, 0 };
+ unsigned char page;
+
+ page = cmd->cmnd[2] & 0x3f;
+ if (page == 0x8 || page == 0x3f) {
+ scsi_sg_copy_from_buffer(cmd, ms10_caching_page,
+ sizeof(ms10_caching_page));
+ cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
+ done(cmd);
+ } else
+ stex_invalid_field(cmd, done);
+ return 0;
+ }
+ case REPORT_LUNS:
+ /*
+ * The shasta firmware does not report actual luns in the
+ * target, so fail the command to force sequential lun scan.
+ * Also, the console device does not support this command.
+ */
+ if (hba->cardtype == st_shasta || id == host->max_id - 1) {
+ stex_invalid_field(cmd, done);
+ return 0;
+ }
+ break;
+ case TEST_UNIT_READY:
+ if (id == host->max_id - 1) {
+ cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
+ done(cmd);
+ return 0;
+ }
+ break;
+ case INQUIRY:
+ if (lun >= host->max_lun) {
+ cmd->result = DID_NO_CONNECT << 16;
+ done(cmd);
+ return 0;
+ }
+ if (id != host->max_id - 1)
+ break;
+ if (!lun && !cmd->device->channel &&
+ (cmd->cmnd[1] & INQUIRY_EVPD) == 0) {
+ scsi_sg_copy_from_buffer(cmd, (void *)console_inq_page,
+ sizeof(console_inq_page));
+ cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
+ done(cmd);
+ } else
+ stex_invalid_field(cmd, done);
+ return 0;
+ case PASSTHRU_CMD:
+ if (cmd->cmnd[1] == PASSTHRU_GET_DRVVER) {
+ struct st_drvver ver;
+ size_t cp_len = sizeof(ver);
+
+ ver.major = ST_VER_MAJOR;
+ ver.minor = ST_VER_MINOR;
+ ver.oem = ST_OEM;
+ ver.build = ST_BUILD_VER;
+ ver.signature[0] = PASSTHRU_SIGNATURE;
+ ver.console_id = host->max_id - 1;
+ ver.host_no = hba->host->host_no;
+ cp_len = scsi_sg_copy_from_buffer(cmd, &ver, cp_len);
+ cmd->result = sizeof(ver) == cp_len ?
+ DID_OK << 16 | COMMAND_COMPLETE << 8 :
+ DID_ERROR << 16 | COMMAND_COMPLETE << 8;
+ done(cmd);
+ return 0;
+ }
+ default:
+ break;
+ }
+
+ cmd->scsi_done = done;
+
+ tag = cmd->request->tag;
+
+ if (unlikely(tag >= host->can_queue))
+ return SCSI_MLQUEUE_HOST_BUSY;
+
+ req = hba->alloc_rq(hba);
+
+ req->lun = lun;
+ req->target = id;
+
+ /* cdb */
+ memcpy(req->cdb, cmd->cmnd, STEX_CDB_LENGTH);
+
+ if (cmd->sc_data_direction == DMA_FROM_DEVICE)
+ req->data_dir = MSG_DATA_DIR_IN;
+ else if (cmd->sc_data_direction == DMA_TO_DEVICE)
+ req->data_dir = MSG_DATA_DIR_OUT;
+ else
+ req->data_dir = MSG_DATA_DIR_ND;
+
+ hba->ccb[tag].cmd = cmd;
+ hba->ccb[tag].sense_bufflen = SCSI_SENSE_BUFFERSIZE;
+ hba->ccb[tag].sense_buffer = cmd->sense_buffer;
+
+ if (!hba->map_sg(hba, req, &hba->ccb[tag])) {
+ hba->ccb[tag].sg_count = 0;
+ memset(&req->variable[0], 0, 8);
+ }
+
+ hba->send(hba, req, tag);
+ return 0;
+}
+
+static DEF_SCSI_QCMD(stex_queuecommand)
+
+static void stex_scsi_done(struct st_ccb *ccb)
+{
+ struct scsi_cmnd *cmd = ccb->cmd;
+ int result;
+
+ if (ccb->srb_status == SRB_STATUS_SUCCESS || ccb->srb_status == 0) {
+ result = ccb->scsi_status;
+ switch (ccb->scsi_status) {
+ case SAM_STAT_GOOD:
+ result |= DID_OK << 16 | COMMAND_COMPLETE << 8;
+ break;
+ case SAM_STAT_CHECK_CONDITION:
+ result |= DRIVER_SENSE << 24;
+ break;
+ case SAM_STAT_BUSY:
+ result |= DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
+ break;
+ default:
+ result |= DID_ERROR << 16 | COMMAND_COMPLETE << 8;
+ break;
+ }
+ }
+ else if (ccb->srb_status & SRB_SEE_SENSE)
+ result = DRIVER_SENSE << 24 | SAM_STAT_CHECK_CONDITION;
+ else switch (ccb->srb_status) {
+ case SRB_STATUS_SELECTION_TIMEOUT:
+ result = DID_NO_CONNECT << 16 | COMMAND_COMPLETE << 8;
+ break;
+ case SRB_STATUS_BUSY:
+ result = DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
+ break;
+ case SRB_STATUS_INVALID_REQUEST:
+ case SRB_STATUS_ERROR:
+ default:
+ result = DID_ERROR << 16 | COMMAND_COMPLETE << 8;
+ break;
+ }
+
+ cmd->result = result;
+ cmd->scsi_done(cmd);
+}
+
+static void stex_copy_data(struct st_ccb *ccb,
+ struct status_msg *resp, unsigned int variable)
+{
+ if (resp->scsi_status != SAM_STAT_GOOD) {
+ if (ccb->sense_buffer != NULL)
+ memcpy(ccb->sense_buffer, resp->variable,
+ min(variable, ccb->sense_bufflen));
+ return;
+ }
+
+ if (ccb->cmd == NULL)
+ return;
+ scsi_sg_copy_from_buffer(ccb->cmd, resp->variable, variable);
+}
+
+static void stex_check_cmd(struct st_hba *hba,
+ struct st_ccb *ccb, struct status_msg *resp)
+{
+ if (ccb->cmd->cmnd[0] == MGT_CMD &&
+ resp->scsi_status != SAM_STAT_CHECK_CONDITION)
+ scsi_set_resid(ccb->cmd, scsi_bufflen(ccb->cmd) -
+ le32_to_cpu(*(__le32 *)&resp->variable[0]));
+}
+
+static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
+{
+ void __iomem *base = hba->mmio_base;
+ struct status_msg *resp;
+ struct st_ccb *ccb;
+ unsigned int size;
+ u16 tag;
+
+ if (unlikely(!(doorbell & MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED)))
+ return;
+
+ /* status payloads */
+ hba->status_head = readl(base + OMR1);
+ if (unlikely(hba->status_head > hba->sts_count)) {
+ printk(KERN_WARNING DRV_NAME "(%s): invalid status head\n",
+ pci_name(hba->pdev));
+ return;
+ }
+
+ /*
+ * it's not a valid status payload if:
+ * 1. there are no pending requests(e.g. during init stage)
+ * 2. there are some pending requests, but the controller is in
+ * reset status, and its type is not st_yosemite
+ * firmware of st_yosemite in reset status will return pending requests
+ * to driver, so we allow it to pass
+ */
+ if (unlikely(hba->out_req_cnt <= 0 ||
+ (hba->mu_status == MU_STATE_RESETTING &&
+ hba->cardtype != st_yosemite))) {
+ hba->status_tail = hba->status_head;
+ goto update_status;
+ }
+
+ while (hba->status_tail != hba->status_head) {
+ resp = stex_get_status(hba);
+ tag = le16_to_cpu(resp->tag);
+ if (unlikely(tag >= hba->host->can_queue)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): invalid tag\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ hba->out_req_cnt--;
+ ccb = &hba->ccb[tag];
+ if (unlikely(hba->wait_ccb == ccb))
+ hba->wait_ccb = NULL;
+ if (unlikely(ccb->req == NULL)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): lagging req\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ size = resp->payload_sz * sizeof(u32); /* payload size */
+ if (unlikely(size < sizeof(*resp) - STATUS_VAR_LEN ||
+ size > sizeof(*resp))) {
+ printk(KERN_WARNING DRV_NAME "(%s): bad status size\n",
+ pci_name(hba->pdev));
+ } else {
+ size -= sizeof(*resp) - STATUS_VAR_LEN; /* copy size */
+ if (size)
+ stex_copy_data(ccb, resp, size);
+ }
+
+ ccb->req = NULL;
+ ccb->srb_status = resp->srb_status;
+ ccb->scsi_status = resp->scsi_status;
+
+ if (likely(ccb->cmd != NULL)) {
+ if (hba->cardtype == st_yosemite)
+ stex_check_cmd(hba, ccb, resp);
+
+ if (unlikely(ccb->cmd->cmnd[0] == PASSTHRU_CMD &&
+ ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER))
+ stex_controller_info(hba, ccb);
+
+ scsi_dma_unmap(ccb->cmd);
+ stex_scsi_done(ccb);
+ } else
+ ccb->req_type = 0;
+ }
+
+update_status:
+ writel(hba->status_head, base + IMR1);
+ readl(base + IMR1); /* flush */
+}
+
+static irqreturn_t stex_intr(int irq, void *__hba)
+{
+ struct st_hba *hba = __hba;
+ void __iomem *base = hba->mmio_base;
+ u32 data;
+ unsigned long flags;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+
+ data = readl(base + ODBL);
+
+ if (data && data != 0xffffffff) {
+ /* clear the interrupt */
+ writel(data, base + ODBL);
+ readl(base + ODBL); /* flush */
+ stex_mu_intr(hba, data);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ if (unlikely(data & MU_OUTBOUND_DOORBELL_REQUEST_RESET &&
+ hba->cardtype == st_shasta))
+ queue_work(hba->work_q, &hba->reset_work);
+ return IRQ_HANDLED;
+ }
+
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ return IRQ_NONE;
+}
+
+static void stex_ss_mu_intr(struct st_hba *hba)
+{
+ struct status_msg *resp;
+ struct st_ccb *ccb;
+ __le32 *scratch;
+ unsigned int size;
+ int count = 0;
+ u32 value;
+ u16 tag;
+
+ if (unlikely(hba->out_req_cnt <= 0 ||
+ hba->mu_status == MU_STATE_RESETTING))
+ return;
+
+ while (count < hba->sts_count) {
+ scratch = hba->scratch + hba->status_tail;
+ value = le32_to_cpu(*scratch);
+ if (unlikely(!(value & SS_STS_NORMAL)))
+ return;
+
+ resp = hba->status_buffer + hba->status_tail;
+ *scratch = 0;
+ ++count;
+ ++hba->status_tail;
+ hba->status_tail %= hba->sts_count+1;
+
+ tag = (u16)value;
+ if (unlikely(tag >= hba->host->can_queue)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): invalid tag\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ hba->out_req_cnt--;
+ ccb = &hba->ccb[tag];
+ if (unlikely(hba->wait_ccb == ccb))
+ hba->wait_ccb = NULL;
+ if (unlikely(ccb->req == NULL)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): lagging req\n", pci_name(hba->pdev));
+ continue;
+ }
+
+ ccb->req = NULL;
+ if (likely(value & SS_STS_DONE)) { /* normal case */
+ ccb->srb_status = SRB_STATUS_SUCCESS;
+ ccb->scsi_status = SAM_STAT_GOOD;
+ } else {
+ ccb->srb_status = resp->srb_status;
+ ccb->scsi_status = resp->scsi_status;
+ size = resp->payload_sz * sizeof(u32);
+ if (unlikely(size < sizeof(*resp) - STATUS_VAR_LEN ||
+ size > sizeof(*resp))) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): bad status size\n",
+ pci_name(hba->pdev));
+ } else {
+ size -= sizeof(*resp) - STATUS_VAR_LEN;
+ if (size)
+ stex_copy_data(ccb, resp, size);
+ }
+ if (likely(ccb->cmd != NULL))
+ stex_check_cmd(hba, ccb, resp);
+ }
+
+ if (likely(ccb->cmd != NULL)) {
+ scsi_dma_unmap(ccb->cmd);
+ stex_scsi_done(ccb);
+ } else
+ ccb->req_type = 0;
+ }
+}
+
+static irqreturn_t stex_ss_intr(int irq, void *__hba)
+{
+ struct st_hba *hba = __hba;
+ void __iomem *base = hba->mmio_base;
+ u32 data;
+ unsigned long flags;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+
+ data = readl(base + YI2H_INT);
+ if (data && data != 0xffffffff) {
+ /* clear the interrupt */
+ writel(data, base + YI2H_INT_C);
+ stex_ss_mu_intr(hba);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ if (unlikely(data & SS_I2H_REQUEST_RESET))
+ queue_work(hba->work_q, &hba->reset_work);
+ return IRQ_HANDLED;
+ }
+
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ return IRQ_NONE;
+}
+
+static int stex_common_handshake(struct st_hba *hba)
+{
+ void __iomem *base = hba->mmio_base;
+ struct handshake_frame *h;
+ dma_addr_t status_phys;
+ u32 data;
+ unsigned long before;
+
+ if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
+ writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
+ readl(base + IDBL);
+ before = jiffies;
+ while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): no handshake signature\n",
+ pci_name(hba->pdev));
+ return -1;
+ }
+ rmb();
+ msleep(1);
+ }
+ }
+
+ udelay(10);
+
+ data = readl(base + OMR1);
+ if ((data & 0xffff0000) == MU_HANDSHAKE_SIGNATURE_HALF) {
+ data &= 0x0000ffff;
+ if (hba->host->can_queue > data) {
+ hba->host->can_queue = data;
+ hba->host->cmd_per_lun = data;
+ }
+ }
+
+ h = (struct handshake_frame *)hba->status_buffer;
+ h->rb_phy = cpu_to_le64(hba->dma_handle);
+ h->req_sz = cpu_to_le16(hba->rq_size);
+ h->req_cnt = cpu_to_le16(hba->rq_count+1);
+ h->status_sz = cpu_to_le16(sizeof(struct status_msg));
+ h->status_cnt = cpu_to_le16(hba->sts_count+1);
+ stex_gettime(&h->hosttime);
+ h->partner_type = HMU_PARTNER_TYPE;
+ if (hba->extra_offset) {
+ h->extra_offset = cpu_to_le32(hba->extra_offset);
+ h->extra_size = cpu_to_le32(hba->dma_size - hba->extra_offset);
+ } else
+ h->extra_offset = h->extra_size = 0;
+
+ status_phys = hba->dma_handle + (hba->rq_count+1) * hba->rq_size;
+ writel(status_phys, base + IMR0);
+ readl(base + IMR0);
+ writel((status_phys >> 16) >> 16, base + IMR1);
+ readl(base + IMR1);
+
+ writel((status_phys >> 16) >> 16, base + OMR0); /* old fw compatible */
+ readl(base + OMR0);
+ writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
+ readl(base + IDBL); /* flush */
+
+ udelay(10);
+ before = jiffies;
+ while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): no signature after handshake frame\n",
+ pci_name(hba->pdev));
+ return -1;
+ }
+ rmb();
+ msleep(1);
+ }
+
+ writel(0, base + IMR0);
+ readl(base + IMR0);
+ writel(0, base + OMR0);
+ readl(base + OMR0);
+ writel(0, base + IMR1);
+ readl(base + IMR1);
+ writel(0, base + OMR1);
+ readl(base + OMR1); /* flush */
+ return 0;
+}
+
+static int stex_ss_handshake(struct st_hba *hba)
+{
+ void __iomem *base = hba->mmio_base;
+ struct st_msg_header *msg_h;
+ struct handshake_frame *h;
+ __le32 *scratch;
+ u32 data, scratch_size;
+ unsigned long before;
+ int ret = 0;
+
+ before = jiffies;
+ while ((readl(base + YIOA_STATUS) & SS_MU_OPERATIONAL) == 0) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): firmware not operational\n",
+ pci_name(hba->pdev));
+ return -1;
+ }
+ msleep(1);
+ }
+
+ msg_h = (struct st_msg_header *)hba->dma_mem;
+ msg_h->handle = cpu_to_le64(hba->dma_handle);
+ msg_h->flag = SS_HEAD_HANDSHAKE;
+
+ h = (struct handshake_frame *)(msg_h + 1);
+ h->rb_phy = cpu_to_le64(hba->dma_handle);
+ h->req_sz = cpu_to_le16(hba->rq_size);
+ h->req_cnt = cpu_to_le16(hba->rq_count+1);
+ h->status_sz = cpu_to_le16(sizeof(struct status_msg));
+ h->status_cnt = cpu_to_le16(hba->sts_count+1);
+ stex_gettime(&h->hosttime);
+ h->partner_type = HMU_PARTNER_TYPE;
+ h->extra_offset = h->extra_size = 0;
+ scratch_size = (hba->sts_count+1)*sizeof(u32);
+ h->scratch_size = cpu_to_le32(scratch_size);
+
+ data = readl(base + YINT_EN);
+ data &= ~4;
+ writel(data, base + YINT_EN);
+ writel((hba->dma_handle >> 16) >> 16, base + YH2I_REQ_HI);
+ readl(base + YH2I_REQ_HI);
+ writel(hba->dma_handle, base + YH2I_REQ);
+ readl(base + YH2I_REQ); /* flush */
+
+ scratch = hba->scratch;
+ before = jiffies;
+ while (!(le32_to_cpu(*scratch) & SS_STS_HANDSHAKE)) {
+ if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+ printk(KERN_ERR DRV_NAME
+ "(%s): no signature after handshake frame\n",
+ pci_name(hba->pdev));
+ ret = -1;
+ break;
+ }
+ rmb();
+ msleep(1);
+ }
+
+ memset(scratch, 0, scratch_size);
+ msg_h->flag = 0;
+ return ret;
+}
+
+static int stex_handshake(struct st_hba *hba)
+{
+ int err;
+ unsigned long flags;
+ unsigned int mu_status;
+
+ err = (hba->cardtype == st_yel) ?
+ stex_ss_handshake(hba) : stex_common_handshake(hba);
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ mu_status = hba->mu_status;
+ if (err == 0) {
+ hba->req_head = 0;
+ hba->req_tail = 0;
+ hba->status_head = 0;
+ hba->status_tail = 0;
+ hba->out_req_cnt = 0;
+ hba->mu_status = MU_STATE_STARTED;
+ } else
+ hba->mu_status = MU_STATE_FAILED;
+ if (mu_status == MU_STATE_RESETTING)
+ wake_up_all(&hba->reset_waitq);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ return err;
+}
+
+static int stex_abort(struct scsi_cmnd *cmd)
+{
+ struct Scsi_Host *host = cmd->device->host;
+ struct st_hba *hba = (struct st_hba *)host->hostdata;
+ u16 tag = cmd->request->tag;
+ void __iomem *base;
+ u32 data;
+ int result = SUCCESS;
+ unsigned long flags;
+
+ scmd_printk(KERN_INFO, cmd, "aborting command\n");
+
+ base = hba->mmio_base;
+ spin_lock_irqsave(host->host_lock, flags);
+ if (tag < host->can_queue &&
+ hba->ccb[tag].req && hba->ccb[tag].cmd == cmd)
+ hba->wait_ccb = &hba->ccb[tag];
+ else
+ goto out;
+
+ if (hba->cardtype == st_yel) {
+ data = readl(base + YI2H_INT);
+ if (data == 0 || data == 0xffffffff)
+ goto fail_out;
+
+ writel(data, base + YI2H_INT_C);
+ stex_ss_mu_intr(hba);
+ } else {
+ data = readl(base + ODBL);
+ if (data == 0 || data == 0xffffffff)
+ goto fail_out;
+
+ writel(data, base + ODBL);
+ readl(base + ODBL); /* flush */
+
+ stex_mu_intr(hba, data);
+ }
+ if (hba->wait_ccb == NULL) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): lost interrupt\n", pci_name(hba->pdev));
+ goto out;
+ }
+
+fail_out:
+ scsi_dma_unmap(cmd);
+ hba->wait_ccb->req = NULL; /* nullify the req's future return */
+ hba->wait_ccb = NULL;
+ result = FAILED;
+out:
+ spin_unlock_irqrestore(host->host_lock, flags);
+ return result;
+}
+
+static void stex_hard_reset(struct st_hba *hba)
+{
+ struct pci_bus *bus;
+ int i;
+ u16 pci_cmd;
+ u8 pci_bctl;
+
+ for (i = 0; i < 16; i++)
+ pci_read_config_dword(hba->pdev, i * 4,
+ &hba->pdev->saved_config_space[i]);
+
+ /* Reset secondary bus. Our controller(MU/ATU) is the only device on
+ secondary bus. Consult Intel 80331/3 developer's manual for detail */
+ bus = hba->pdev->bus;
+ pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &pci_bctl);
+ pci_bctl |= PCI_BRIDGE_CTL_BUS_RESET;
+ pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
+
+ /*
+ * 1 ms may be enough for 8-port controllers. But 16-port controllers
+ * require more time to finish bus reset. Use 100 ms here for safety
+ */
+ msleep(100);
+ pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
+ pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);
+
+ for (i = 0; i < MU_HARD_RESET_WAIT; i++) {
+ pci_read_config_word(hba->pdev, PCI_COMMAND, &pci_cmd);
+ if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER))
+ break;
+ msleep(1);
+ }
+
+ ssleep(5);
+ for (i = 0; i < 16; i++)
+ pci_write_config_dword(hba->pdev, i * 4,
+ hba->pdev->saved_config_space[i]);
+}
+
+static int stex_yos_reset(struct st_hba *hba)
+{
+ void __iomem *base;
+ unsigned long flags, before;
+ int ret = 0;
+
+ base = hba->mmio_base;
+ writel(MU_INBOUND_DOORBELL_RESET, base + IDBL);
+ readl(base + IDBL); /* flush */
+ before = jiffies;
+ while (hba->out_req_cnt > 0) {
+ if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): reset timeout\n", pci_name(hba->pdev));
+ ret = -1;
+ break;
+ }
+ msleep(1);
+ }
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (ret == -1)
+ hba->mu_status = MU_STATE_FAILED;
+ else
+ hba->mu_status = MU_STATE_STARTED;
+ wake_up_all(&hba->reset_waitq);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ return ret;
+}
+
+static void stex_ss_reset(struct st_hba *hba)
+{
+ writel(SS_H2I_INT_RESET, hba->mmio_base + YH2I_INT);
+ readl(hba->mmio_base + YH2I_INT);
+ ssleep(5);
+}
+
+static int stex_do_reset(struct st_hba *hba)
+{
+ struct st_ccb *ccb;
+ unsigned long flags;
+ unsigned int mu_status = MU_STATE_RESETTING;
+ u16 tag;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ if (hba->mu_status == MU_STATE_STARTING) {
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ printk(KERN_INFO DRV_NAME "(%s): request reset during init\n",
+ pci_name(hba->pdev));
+ return 0;
+ }
+ while (hba->mu_status == MU_STATE_RESETTING) {
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ wait_event_timeout(hba->reset_waitq,
+ hba->mu_status != MU_STATE_RESETTING,
+ MU_MAX_DELAY * HZ);
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ mu_status = hba->mu_status;
+ }
+
+ if (mu_status != MU_STATE_RESETTING) {
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+ return (mu_status == MU_STATE_STARTED) ? 0 : -1;
+ }
+
+ hba->mu_status = MU_STATE_RESETTING;
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ if (hba->cardtype == st_yosemite)
+ return stex_yos_reset(hba);
+
+ if (hba->cardtype == st_shasta)
+ stex_hard_reset(hba);
+ else if (hba->cardtype == st_yel)
+ stex_ss_reset(hba);
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ for (tag = 0; tag < hba->host->can_queue; tag++) {
+ ccb = &hba->ccb[tag];
+ if (ccb->req == NULL)
+ continue;
+ ccb->req = NULL;
+ if (ccb->cmd) {
+ scsi_dma_unmap(ccb->cmd);
+ ccb->cmd->result = DID_RESET << 16;
+ ccb->cmd->scsi_done(ccb->cmd);
+ ccb->cmd = NULL;
+ }
+ }
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ if (stex_handshake(hba) == 0)
+ return 0;
+
+ printk(KERN_WARNING DRV_NAME "(%s): resetting: handshake failed\n",
+ pci_name(hba->pdev));
+ return -1;
+}
+
+static int stex_reset(struct scsi_cmnd *cmd)
+{
+ struct st_hba *hba;
+
+ hba = (struct st_hba *) &cmd->device->host->hostdata[0];
+
+ shost_printk(KERN_INFO, cmd->device->host,
+ "resetting host\n");
+
+ return stex_do_reset(hba) ? FAILED : SUCCESS;
+}
+
+static void stex_reset_work(struct work_struct *work)
+{
+ struct st_hba *hba = container_of(work, struct st_hba, reset_work);
+
+ stex_do_reset(hba);
+}
+
+static int stex_biosparam(struct scsi_device *sdev,
+ struct block_device *bdev, sector_t capacity, int geom[])
+{
+ int heads = 255, sectors = 63;
+
+ if (capacity < 0x200000) {
+ heads = 64;
+ sectors = 32;
+ }
+
+ sector_div(capacity, heads * sectors);
+
+ geom[0] = heads;
+ geom[1] = sectors;
+ geom[2] = capacity;
+
+ return 0;
+}
+
+static struct scsi_host_template driver_template = {
+ .module = THIS_MODULE,
+ .name = DRV_NAME,
+ .proc_name = DRV_NAME,
+ .bios_param = stex_biosparam,
+ .queuecommand = stex_queuecommand,
+ .slave_configure = stex_slave_config,
+ .eh_abort_handler = stex_abort,
+ .eh_host_reset_handler = stex_reset,
+ .this_id = -1,
+ .use_blk_tags = 1,
+};
+
+static struct pci_device_id stex_pci_tbl[] = {
+ /* st_shasta */
+ { 0x105a, 0x8350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ st_shasta }, /* SuperTrak EX8350/8300/16350/16300 */
+ { 0x105a, 0xc350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ st_shasta }, /* SuperTrak EX12350 */
+ { 0x105a, 0x4302, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ st_shasta }, /* SuperTrak EX4350 */
+ { 0x105a, 0xe350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ st_shasta }, /* SuperTrak EX24350 */
+
+ /* st_vsc */
+ { 0x105a, 0x7250, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_vsc },
+
+ /* st_yosemite */
+ { 0x105a, 0x8650, 0x105a, PCI_ANY_ID, 0, 0, st_yosemite },
+
+ /* st_seq */
+ { 0x105a, 0x3360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_seq },
+
+ /* st_yel */
+ { 0x105a, 0x8650, 0x1033, PCI_ANY_ID, 0, 0, st_yel },
+ { 0x105a, 0x8760, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_yel },
+ { } /* terminate list */
+};
+
+static struct st_card_info stex_card_info[] = {
+ /* st_shasta */
+ {
+ .max_id = 17,
+ .max_lun = 8,
+ .max_channel = 0,
+ .rq_count = 32,
+ .rq_size = 1048,
+ .sts_count = 32,
+ .alloc_rq = stex_alloc_req,
+ .map_sg = stex_map_sg,
+ .send = stex_send_cmd,
+ },
+
+ /* st_vsc */
+ {
+ .max_id = 129,
+ .max_lun = 1,
+ .max_channel = 0,
+ .rq_count = 32,
+ .rq_size = 1048,
+ .sts_count = 32,
+ .alloc_rq = stex_alloc_req,
+ .map_sg = stex_map_sg,
+ .send = stex_send_cmd,
+ },
+
+ /* st_yosemite */
+ {
+ .max_id = 2,
+ .max_lun = 256,
+ .max_channel = 0,
+ .rq_count = 256,
+ .rq_size = 1048,
+ .sts_count = 256,
+ .alloc_rq = stex_alloc_req,
+ .map_sg = stex_map_sg,
+ .send = stex_send_cmd,
+ },
+
+ /* st_seq */
+ {
+ .max_id = 129,
+ .max_lun = 1,
+ .max_channel = 0,
+ .rq_count = 32,
+ .rq_size = 1048,
+ .sts_count = 32,
+ .alloc_rq = stex_alloc_req,
+ .map_sg = stex_map_sg,
+ .send = stex_send_cmd,
+ },
+
+ /* st_yel */
+ {
+ .max_id = 129,
+ .max_lun = 256,
+ .max_channel = 3,
+ .rq_count = 801,
+ .rq_size = 512,
+ .sts_count = 801,
+ .alloc_rq = stex_ss_alloc_req,
+ .map_sg = stex_ss_map_sg,
+ .send = stex_ss_send_cmd,
+ },
+};
+
+static int stex_set_dma_mask(struct pci_dev * pdev)
+{
+ int ret;
+
+ if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
+ && !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)))
+ return 0;
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (!ret)
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ return ret;
+}
+
+static int stex_request_irq(struct st_hba *hba)
+{
+ struct pci_dev *pdev = hba->pdev;
+ int status;
+
+ if (msi) {
+ status = pci_enable_msi(pdev);
+ if (status != 0)
+ printk(KERN_ERR DRV_NAME
+ "(%s): error %d setting up MSI\n",
+ pci_name(pdev), status);
+ else
+ hba->msi_enabled = 1;
+ } else
+ hba->msi_enabled = 0;
+
+ status = request_irq(pdev->irq, hba->cardtype == st_yel ?
+ stex_ss_intr : stex_intr, IRQF_SHARED, DRV_NAME, hba);
+
+ if (status != 0) {
+ if (hba->msi_enabled)
+ pci_disable_msi(pdev);
+ }
+ return status;
+}
+
+static void stex_free_irq(struct st_hba *hba)
+{
+ struct pci_dev *pdev = hba->pdev;
+
+ free_irq(pdev->irq, hba);
+ if (hba->msi_enabled)
+ pci_disable_msi(pdev);
+}
+
+static int stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct st_hba *hba;
+ struct Scsi_Host *host;
+ const struct st_card_info *ci = NULL;
+ u32 sts_offset, cp_offset, scratch_offset;
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err)
+ return err;
+
+ pci_set_master(pdev);
+
+ host = scsi_host_alloc(&driver_template, sizeof(struct st_hba));
+
+ if (!host) {
+ printk(KERN_ERR DRV_NAME "(%s): scsi_host_alloc failed\n",
+ pci_name(pdev));
+ err = -ENOMEM;
+ goto out_disable;
+ }
+
+ hba = (struct st_hba *)host->hostdata;
+ memset(hba, 0, sizeof(struct st_hba));
+
+ err = pci_request_regions(pdev, DRV_NAME);
+ if (err < 0) {
+ printk(KERN_ERR DRV_NAME "(%s): request regions failed\n",
+ pci_name(pdev));
+ goto out_scsi_host_put;
+ }
+
+ hba->mmio_base = pci_ioremap_bar(pdev, 0);
+ if ( !hba->mmio_base) {
+ printk(KERN_ERR DRV_NAME "(%s): memory map failed\n",
+ pci_name(pdev));
+ err = -ENOMEM;
+ goto out_release_regions;
+ }
+
+ err = stex_set_dma_mask(pdev);
+ if (err) {
+ printk(KERN_ERR DRV_NAME "(%s): set dma mask failed\n",
+ pci_name(pdev));
+ goto out_iounmap;
+ }
+
+ hba->cardtype = (unsigned int) id->driver_data;
+ ci = &stex_card_info[hba->cardtype];
+ sts_offset = scratch_offset = (ci->rq_count+1) * ci->rq_size;
+ if (hba->cardtype == st_yel)
+ sts_offset += (ci->sts_count+1) * sizeof(u32);
+ cp_offset = sts_offset + (ci->sts_count+1) * sizeof(struct status_msg);
+ hba->dma_size = cp_offset + sizeof(struct st_frame);
+ if (hba->cardtype == st_seq ||
+ (hba->cardtype == st_vsc && (pdev->subsystem_device & 1))) {
+ hba->extra_offset = hba->dma_size;
+ hba->dma_size += ST_ADDITIONAL_MEM;
+ }
+ hba->dma_mem = dma_alloc_coherent(&pdev->dev,
+ hba->dma_size, &hba->dma_handle, GFP_KERNEL);
+ if (!hba->dma_mem) {
+ /* Retry minimum coherent mapping for st_seq and st_vsc */
+ if (hba->cardtype == st_seq ||
+ (hba->cardtype == st_vsc && (pdev->subsystem_device & 1))) {
+ printk(KERN_WARNING DRV_NAME
+ "(%s): allocating min buffer for controller\n",
+ pci_name(pdev));
+ hba->dma_size = hba->extra_offset
+ + ST_ADDITIONAL_MEM_MIN;
+ hba->dma_mem = dma_alloc_coherent(&pdev->dev,
+ hba->dma_size, &hba->dma_handle, GFP_KERNEL);
+ }
+
+ if (!hba->dma_mem) {
+ err = -ENOMEM;
+ printk(KERN_ERR DRV_NAME "(%s): dma mem alloc failed\n",
+ pci_name(pdev));
+ goto out_iounmap;
+ }
+ }
+
+ hba->ccb = kcalloc(ci->rq_count, sizeof(struct st_ccb), GFP_KERNEL);
+ if (!hba->ccb) {
+ err = -ENOMEM;
+ printk(KERN_ERR DRV_NAME "(%s): ccb alloc failed\n",
+ pci_name(pdev));
+ goto out_pci_free;
+ }
+
+ if (hba->cardtype == st_yel)
+ hba->scratch = (__le32 *)(hba->dma_mem + scratch_offset);
+ hba->status_buffer = (struct status_msg *)(hba->dma_mem + sts_offset);
+ hba->copy_buffer = hba->dma_mem + cp_offset;
+ hba->rq_count = ci->rq_count;
+ hba->rq_size = ci->rq_size;
+ hba->sts_count = ci->sts_count;
+ hba->alloc_rq = ci->alloc_rq;
+ hba->map_sg = ci->map_sg;
+ hba->send = ci->send;
+ hba->mu_status = MU_STATE_STARTING;
+
+ if (hba->cardtype == st_yel)
+ host->sg_tablesize = 38;
+ else
+ host->sg_tablesize = 32;
+ host->can_queue = ci->rq_count;
+ host->cmd_per_lun = ci->rq_count;
+ host->max_id = ci->max_id;
+ host->max_lun = ci->max_lun;
+ host->max_channel = ci->max_channel;
+ host->unique_id = host->host_no;
+ host->max_cmd_len = STEX_CDB_LENGTH;
+
+ hba->host = host;
+ hba->pdev = pdev;
+ init_waitqueue_head(&hba->reset_waitq);
+
+ snprintf(hba->work_q_name, sizeof(hba->work_q_name),
+ "stex_wq_%d", host->host_no);
+ hba->work_q = create_singlethread_workqueue(hba->work_q_name);
+ if (!hba->work_q) {
+ printk(KERN_ERR DRV_NAME "(%s): create workqueue failed\n",
+ pci_name(pdev));
+ err = -ENOMEM;
+ goto out_ccb_free;
+ }
+ INIT_WORK(&hba->reset_work, stex_reset_work);
+
+ err = stex_request_irq(hba);
+ if (err) {
+ printk(KERN_ERR DRV_NAME "(%s): request irq failed\n",
+ pci_name(pdev));
+ goto out_free_wq;
+ }
+
+ err = stex_handshake(hba);
+ if (err)
+ goto out_free_irq;
+
+ err = scsi_init_shared_tag_map(host, host->can_queue);
+ if (err) {
+ printk(KERN_ERR DRV_NAME "(%s): init shared queue failed\n",
+ pci_name(pdev));
+ goto out_free_irq;
+ }
+
+ pci_set_drvdata(pdev, hba);
+
+ err = scsi_add_host(host, &pdev->dev);
+ if (err) {
+ printk(KERN_ERR DRV_NAME "(%s): scsi_add_host failed\n",
+ pci_name(pdev));
+ goto out_free_irq;
+ }
+
+ scsi_scan_host(host);
+
+ return 0;
+
+out_free_irq:
+ stex_free_irq(hba);
+out_free_wq:
+ destroy_workqueue(hba->work_q);
+out_ccb_free:
+ kfree(hba->ccb);
+out_pci_free:
+ dma_free_coherent(&pdev->dev, hba->dma_size,
+ hba->dma_mem, hba->dma_handle);
+out_iounmap:
+ iounmap(hba->mmio_base);
+out_release_regions:
+ pci_release_regions(pdev);
+out_scsi_host_put:
+ scsi_host_put(host);
+out_disable:
+ pci_disable_device(pdev);
+
+ return err;
+}
+
+static void stex_hba_stop(struct st_hba *hba)
+{
+ struct req_msg *req;
+ struct st_msg_header *msg_h;
+ unsigned long flags;
+ unsigned long before;
+ u16 tag = 0;
+
+ spin_lock_irqsave(hba->host->host_lock, flags);
+ req = hba->alloc_rq(hba);
+ if (hba->cardtype == st_yel) {
+ msg_h = (struct st_msg_header *)req - 1;
+ memset(msg_h, 0, hba->rq_size);
+ } else
+ memset(req, 0, hba->rq_size);
+
+ if (hba->cardtype == st_yosemite || hba->cardtype == st_yel) {
+ req->cdb[0] = MGT_CMD;
+ req->cdb[1] = MGT_CMD_SIGNATURE;
+ req->cdb[2] = CTLR_CONFIG_CMD;
+ req->cdb[3] = CTLR_SHUTDOWN;
+ } else {
+ req->cdb[0] = CONTROLLER_CMD;
+ req->cdb[1] = CTLR_POWER_STATE_CHANGE;
+ req->cdb[2] = CTLR_POWER_SAVING;
+ }
+
+ hba->ccb[tag].cmd = NULL;
+ hba->ccb[tag].sg_count = 0;
+ hba->ccb[tag].sense_bufflen = 0;
+ hba->ccb[tag].sense_buffer = NULL;
+ hba->ccb[tag].req_type = PASSTHRU_REQ_TYPE;
+
+ hba->send(hba, req, tag);
+ spin_unlock_irqrestore(hba->host->host_lock, flags);
+
+ before = jiffies;
+ while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
+ if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
+ hba->ccb[tag].req_type = 0;
+ return;
+ }
+ msleep(1);
+ }
+}
+
+static void stex_hba_free(struct st_hba *hba)
+{
+ stex_free_irq(hba);
+
+ destroy_workqueue(hba->work_q);
+
+ iounmap(hba->mmio_base);
+
+ pci_release_regions(hba->pdev);
+
+ kfree(hba->ccb);
+
+ dma_free_coherent(&hba->pdev->dev, hba->dma_size,
+ hba->dma_mem, hba->dma_handle);
+}
+
+static void stex_remove(struct pci_dev *pdev)
+{
+ struct st_hba *hba = pci_get_drvdata(pdev);
+
+ scsi_remove_host(hba->host);
+
+ stex_hba_stop(hba);
+
+ stex_hba_free(hba);
+
+ scsi_host_put(hba->host);
+
+ pci_disable_device(pdev);
+}
+
+static void stex_shutdown(struct pci_dev *pdev)
+{
+ struct st_hba *hba = pci_get_drvdata(pdev);
+
+ stex_hba_stop(hba);
+}
+
+MODULE_DEVICE_TABLE(pci, stex_pci_tbl);
+
+static struct pci_driver stex_pci_driver = {
+ .name = DRV_NAME,
+ .id_table = stex_pci_tbl,
+ .probe = stex_probe,
+ .remove = stex_remove,
+ .shutdown = stex_shutdown,
+};
+
+static int __init stex_init(void)
+{
+ printk(KERN_INFO DRV_NAME
+ ": Promise SuperTrak EX Driver version: %s\n",
+ ST_DRIVER_VERSION);
+
+ return pci_register_driver(&stex_pci_driver);
+}
+
+static void __exit stex_exit(void)
+{
+ pci_unregister_driver(&stex_pci_driver);
+}
+
+module_init(stex_init);
+module_exit(stex_exit);
Code Review / kvmfornfv.git / blobdiff