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mpt_scst.c
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/*
* mpt_scst.c
*
* Copyright (C) 2005 Beijing Soul Technology Co., Ltd.
* Copyright (C) 2002, 2003, 2004 LSI Logic Corporation
* Copyright (C) 2004 Vladislav Bolkhovitin <[email protected]>
* Copyright (C) 2004 Leonid Stoljar
*
* MPT SCSI target mode driver for SCST.
*
* Originally By: Stephen Shirron
* Port to SCST By: Hu Gang <[email protected]>
*
* 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.
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <scsi/scsi.h>
#include <linux/seq_file.h>
#include <scsi/scsi_host.h>
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)
#include <linux/pci.h>
#endif
#ifdef INSIDE_KERNEL_TREE
#include <scst/scst.h>
#include <scst/scst_debug.h>
#else
#include "scst.h"
#include <scst_debug.h>
#endif
#include "mpt_scst.h"
#define MYNAM "mpt_scst"
#ifdef CONFIG_SCST_TRACING
static int trace_mpi;
#define TRACE_MPI 0x80000000
#endif
#ifdef CONFIG_SCST_DEBUG
static char *mpt_state_string[] = {
"0",
"new",
"need data",
"data in",
"data out",
"processed",
"NULL",
};
#endif
#ifdef CONFIG_SCST_DEBUG
#define SCST_DEFAULT_MPT_LOG_FLAGS (TRACE_FUNCTION | TRACE_PID | \
TRACE_OUT_OF_MEM | TRACE_MGMT | \
TRACE_MGMT_DEBUG | TRACE_MINOR | TRACE_SPECIAL)
#else
# ifdef CONFIG_SCST_TRACING
#define SCST_DEFAULT_MPT_LOG_FLAGS (TRACE_FUNCTION | TRACE_PID | \
TRACE_OUT_OF_MEM | TRACE_MGMT | TRACE_MINOR | TRACE_SPECIAL)
# endif
#endif
static MPT_STM_PRIV *mpt_stm_priv[MPT_MAX_ADAPTERS+1];
static int set_aliases_in_fcportpage1 = 1;
static int num_aliases;
static int stm_context;
static int mpt_stm_adapter_online(MPT_STM_PRIV *priv);
static void mpt_stm_adapter_dispose(MPT_STM_PRIV *priv);
static int mpt_stm_adapter_install(MPT_ADAPTER *ioc);
static int __init _mpt_stm_init(void);
static void stmapp_set_status(MPT_STM_PRIV *priv, CMD *cmd, int status);
static void stmapp_tgt_command(MPT_STM_PRIV *priv, u32 reply_word);
static void stm_cmd_buf_post(MPT_STM_PRIV *priv, int index);
static void stm_tgt_reply_high_pri(MPT_ADAPTER *ioc,
TargetCmdBufferPostErrorReply_t *rep);
static void stm_target_reply_error(MPT_ADAPTER *ioc, TargetErrorReply_t *rep);
static void stmapp_target_error(MPT_STM_PRIV *priv, u32 reply_word, int index,
int status, int reason);
static void stm_link_service_reply(MPT_ADAPTER *ioc,
LinkServiceBufferPostReply_t *rep);
static void stm_link_service_rsp_reply(MPT_ADAPTER *ioc,
LinkServiceRspRequest_t *req,
LinkServiceRspReply_t *rep);
static void stmapp_set_sense_info(MPT_STM_PRIV *priv,
CMD *cmd, int sense_key, int asc, int ascq);
static void stmapp_srr_adjust_offset(MPT_STM_PRIV *priv, int index);
static void stmapp_srr_convert_ta_to_tss(MPT_STM_PRIV *priv, int index);
static void stmapp_abts_process(MPT_STM_PRIV *priv, int rx_id,
LinkServiceBufferPostReply_t *rep, int index);
static int stm_do_config_action(MPT_STM_PRIV *priv, int action, int type,
int number, int address, int length, int sleep);
static int stm_get_config_page(MPT_STM_PRIV *priv, int type, int number,
int address, int sleep);
static int stm_set_config_page(MPT_STM_PRIV *priv, int type, int number,
int address, int sleep);
static void stm_cmd_buf_post_list(MPT_STM_PRIV *priv, int index);
static int stm_send_target_status(MPT_STM_PRIV *priv, u32 reply_word,
int index, int flags, int lun, int tag);
static void stm_send_els(MPT_STM_PRIV *priv, LinkServiceBufferPostReply_t *rep,
int index, int length);
static void stm_link_serv_buf_post(MPT_STM_PRIV *priv, int index);
static void stm_wait(MPT_STM_PRIV *priv, int milliseconds, int sleep);
static int stm_wait_for(MPT_STM_PRIV *priv, volatile int *flag, int seconds,
int sleep);
static void stmapp_srr_process(MPT_STM_PRIV *priv, int rx_id, int r_ctl,
u32 offset, LinkServiceBufferPostReply_t *rep,
int index);
static void stm_set_scsi_port_page1(MPT_STM_PRIV *priv, int sleep);
#ifdef CONFIG_SCST_DEBUG
#define trace_flag mpt_trace_flag
static unsigned long mpt_trace_flag = TRACE_FUNCTION | TRACE_OUT_OF_MEM | TRACE_SPECIAL;
#else
# ifdef CONFIG_SCST_TRACING
#define trace_flag mpt_trace_flag
static unsigned long mpt_trace_flag = TRACE_OUT_OF_MEM | TRACE_MGMT | TRACE_SPECIAL;
# endif
#endif
#ifdef CONFIG_SCST_PROC
static int mpt_target_show(struct seq_file *seq, void *v)
{
struct mpt_tgt *tgt = (struct mpt_tgt *)seq->private;
MPT_ADAPTER *ioc = tgt->priv->ioc;
MPT_STM_PRIV *priv = tgt->priv;
TRACE_ENTRY();
TRACE_DBG("priv %p, tgt %p", priv, tgt);
sBUG_ON(tgt == NULL);
sBUG_ON(ioc == NULL);
seq_printf(seq, "ProductID :0x%04x (%s)\nTarget Enable :%s\n",
ioc->facts.ProductID, ioc->prod_name,
tgt->target_enable ? "True" : "False");
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 15)
if (ioc->bus_type == SCSI) {
#else
if (ioc->bus_type == SPI) {
#endif
int i = 0;
seq_printf(seq, "Target ID :%d\n"
"Capabilities :0x%x\n"
"PhysicalInterface:0x%x\n",
priv->port_id,
priv->SCSIPortPage0.Capabilities,
priv->SCSIPortPage0.PhysicalInterface);
seq_printf(seq, "Configuration :0x%x\n"
"OnBusTimerValue :0x%x\n"
"TargetConfig :0x%x\n"
"IDConfig :0x%x\n",
priv->SCSIPortPage1.Configuration,
priv->SCSIPortPage1.OnBusTimerValue,
priv->SCSIPortPage1.TargetConfig,
priv->SCSIPortPage1.IDConfig);
seq_printf(seq, "PortFlags :0x%x\n"
"PortSettings :0x%x\n",
priv->SCSIPortPage2.PortFlags,
priv->SCSIPortPage2.PortSettings);
#if 0
for (i = 0; i < 16; i++) {
seq_printf(seq, " DeviceSeting %02d: 0x%x 0x%x 0x%x\n",
priv->SCSIPortPage2.DeviceSettings[i].Timeout,
priv->SCSIPortPage2.DeviceSettings[i].SyncFactor,
priv->SCSIPortPage2.DeviceSettings[i].DeviceFlags);
}
#endif
for (i = 0; i < NUM_SCSI_DEVICES; i++) {
seq_printf(seq, " Device %02d: 0x%x, 0x%x\n", i,
priv->SCSIDevicePage1[i].RequestedParameters,
priv->SCSIDevicePage1[i].Configuration);
}
}
if (ioc->bus_type == FC) {
seq_printf(seq, "WWN :%08X%08X:%08X%08X\n",
ioc->fc_port_page0[0].WWNN.High,
ioc->fc_port_page0[0].WWNN.Low,
ioc->fc_port_page0[0].WWPN.High,
ioc->fc_port_page0[0].WWPN.Low);
}
TRACE_EXIT();
return 0;
}
static ssize_t mpt_proc_target_write(struct file *file, const char __user *buf,
size_t length, loff_t *off)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
struct mpt_tgt *tgt = (struct mpt_tgt *)PDE(file->f_dentry->d_inode)->data;
#else
struct mpt_tgt *tgt = (struct mpt_tgt *)PDE_DATA(file->f_dentry->d_inode);
#endif
MPT_ADAPTER *ioc = tgt->priv->ioc;
int res = 0;
char tmp[32+1];
TRACE_ENTRY();
res = min_t(int, 32, length);
if (copy_from_user(tmp, buf, res)) {
res = -EFAULT;
goto out;
}
tmp[res] = 0;
TRACE_DBG("buff '%s'", tmp);
if (strncmp("target:enable", tmp, strlen("target:enable")) == 0) {
TRACE_DBG("Enable Target, %d, %d", ioc->id, tgt->target_enable);
if (tgt->target_enable != 1) {
mpt_stm_adapter_online(mpt_stm_priv[ioc->id]);
tgt->target_enable = 1;
}
}
if (strncmp("target:disable", tmp, strlen("target:disable")) == 0) {
TRACE_DBG("Disable Target %d, %d", ioc->id, tgt->target_enable);
if (tgt->target_enable != 0) {
/* FIXME */
tgt->target_enable = 0;
}
}
if (strncmp("target_id:", tmp, strlen("target_id:")) == 0) {
char *s = tmp + strlen("target_id:");
int id = simple_strtoul(s, NULL, 0);
if (id < MPT_MAX_SCSI_DEVICES) {
if (IsScsi(tgt->priv)) {
TRACE_DBG("Changing target id to %d\n", id);
tgt->priv->port_id = id;
stm_set_scsi_port_page1(tgt->priv, NO_SLEEP);
}
}
}
out:
TRACE_EXIT_RES(res);
return length;
}
static struct scst_proc_data mpt_target_proc_data = {
SCST_DEF_RW_SEQ_OP(mpt_proc_target_write)
.show = mpt_target_show,
};
#endif
static int mpt_target_detect(struct scst_tgt_template *temp1);
static int mpt_target_release(struct scst_tgt *scst_tgt);
static int stmapp_pending_sense(struct mpt_cmd *mpt_cmd);
static int mpt_xmit_response(struct scst_cmd *scst_cmd);
static void mpt_inquiry_no_tagged_commands(MPT_STM_PRIV *priv,
struct scst_cmd *scst_cmd);
static int mpt_rdy_to_xfer(struct scst_cmd *scst_cmd);
static void mpt_on_free_cmd(struct scst_cmd *scst_cmd);
static void mpt_task_mgmt_fn_done(struct scst_mgmt_cmd *mcmd);
static int mpt_handle_task_mgmt(MPT_STM_PRIV *priv, u32 reply_word,
int task_mgmt, int lun);
static int mpt_send_cmd_to_scst(struct mpt_cmd *cmd,
enum scst_exec_context context);
static struct scst_tgt_template tgt_template = {
.name = MYNAM,
.sg_tablesize = 128, /* FIXME */
.use_clustering = 1,
#ifdef DEBUG_WORK_IN_THREAD
.xmit_response_atomic = 0,
.rdy_to_xfer_atomic = 0,
#else
.xmit_response_atomic = 1,
.rdy_to_xfer_atomic = 1,
#endif
.detect = mpt_target_detect,
.release = mpt_target_release,
.xmit_response = mpt_xmit_response,
.rdy_to_xfer = mpt_rdy_to_xfer,
.on_free_cmd = mpt_on_free_cmd,
.task_mgmt_fn_done = mpt_task_mgmt_fn_done,
};
static inline void mpt_msg_frame_free(MPT_STM_PRIV *priv, int index)
{
MPT_ADAPTER *ioc = priv->ioc;
if (priv->current_mf[index] != NULL) {
TRACE_DBG("%s: free mf index %d, %p", ioc->name,
MF_TO_INDEX(priv->current_mf[index]),
priv->current_mf[index]);
mpt_free_msg_frame(_HANDLE_IOC_ID, priv->current_mf[index]);
priv->current_mf[index] = NULL;
}
}
static inline MPT_FRAME_HDR *mpt_msg_frame_alloc(MPT_ADAPTER *ioc, int index)
{
MPT_STM_PRIV *priv = mpt_stm_priv[ioc->id];
MPT_FRAME_HDR *mf;
if (index != -1) {
TRACE_DBG("%s: current_mf %p, index %d",
ioc->name, priv->current_mf[index], index);
WARN_ON(priv->current_mf[index] != NULL);
}
mf = mpt_get_msg_frame(stm_context, _IOC_ID);
sBUG_ON(mf == NULL);
if (index != -1)
priv->current_mf[index] = mf;
TRACE_DBG("%s: alloc mf index %d, %p, %d", ioc->name,
MF_TO_INDEX(mf), mf, index);
return mf;
}
static int _mpt_ada_nums;
static int mptstm_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
int ret = 0;
struct mpt_tgt *tgt;
#ifdef CONFIG_SCST_PROC
struct proc_dir_entry *p;
struct proc_dir_entry *root;
char name[4];
#endif
TRACE_ENTRY();
ret = mpt_stm_adapter_install(ioc);
if (ret != 0)
goto out;
tgt = kmalloc(sizeof(*tgt), GFP_KERNEL);
TRACE_MEM("kmalloc(GFP_KERNEL) for tgt (%zd), %p",
sizeof(*tgt), tgt);
if (tgt == NULL) {
TRACE(TRACE_OUT_OF_MEM, "%s",
"Allocation of tgt failed");
ret = -ENOMEM;
goto out;
}
memset(tgt, 0, sizeof(*tgt));
tgt->priv = mpt_stm_priv[ioc->id];
tgt->target_enable = 0;
tgt->priv->port_id = 1;
/* tgt->priv->scsi_port_config = MPI_SCSIPORTPAGE1_TARGCONFIG_INIT_TARG; */
tgt->priv->scsi_port_config = MPI_SCSIPORTPAGE1_TARGCONFIG_TARG_ONLY;
/* tgt->priv->scsi_id_config = 0x7; */
tgt->priv->scsi_id_config = 0;
atomic_set(&tgt->sess_count, 0);
init_waitqueue_head(&tgt->waitQ);
tgt->scst_tgt = scst_register_target(&tgt_template, MYNAM);
if (tgt->scst_tgt == NULL) {
PRINT_ERROR(MYNAM ": scst_register_target() failed for host %p",
pdev);
ret = -ENODEV;
goto out;
}
#ifdef CONFIG_SCST_PROC
root = scst_proc_get_tgt_root(&tgt_template);
scnprintf(name, sizeof(name), "%d", ioc->id);
mpt_target_proc_data.data = (void *)tgt;
p = scst_create_proc_entry(root, name,
&mpt_target_proc_data);
if (p == NULL) {
PRINT_ERROR("Not enough memory to register "
"target driver %s entry %s in /proc",
tgt_template.name, name);
scst_unregister_target(tgt->scst_tgt);
ret = -ENOMEM;
goto out;
}
#endif
scst_tgt_set_tgt_priv(tgt->scst_tgt, tgt);
mpt_stm_priv[ioc->id]->tgt = tgt;
_mpt_ada_nums++;
out:
TRACE_EXIT_RES(ret);
return ret;
}
static void mptstm_remove(struct pci_dev *pdev)
{
MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
MPT_STM_PRIV *priv;
priv = mpt_stm_priv[ioc->id];
if (priv != NULL)
mpt_stm_adapter_dispose(priv);
}
static struct mpt_pci_driver mptstm_driver = {
.probe = mptstm_probe,
.remove = mptstm_remove,
};
/*
* mpt_target_detect
*
* this function is intended to detect the target adapters that are present in
* the system. Each found adapter should be registered by calling
* scst_register_target(). The function should return a value >= 0 to signify
* the number of detected target adapters. A negative value should be
* returned whenever there is an error.
*/
static int mpt_target_detect(struct scst_tgt_template *templ)
{
int ret = 0;
TRACE_ENTRY();
ret = _mpt_stm_init();
if (ret != 0)
goto out;
if (mpt_device_driver_register(&mptstm_driver, MPTSTM_DRIVER)) {
printk(KERN_WARNING MYNAM
": failed to register for device driver callbacks\n");
ret = -ENODEV;
goto out;
}
ret = _mpt_ada_nums;
out:
TRACE_EXIT_RES(ret);
return ret;
}
static struct scst_cmd *_stm_target_command(MPT_STM_PRIV *priv, int reply_word,
struct mpt_cmd *mpt_cmd)
{
u8 *cdb;
int lun, tag, dl, alias, index, init_index, task_mgmt;
char alias_lun[32];
CMD *cmd;
struct scst_cmd *scst_cmd;
struct mpt_sess *sess = mpt_cmd->sess;
#ifdef CONFIG_SCST_DEBUG
MPT_ADAPTER *ioc = priv->ioc;
#endif
/*
* Get the CBD, LUN, tag, Task Mgmt flags, and data length from the
* receive packet
*/
TRACE_ENTRY();
index = GET_IO_INDEX(reply_word);
init_index = GET_INITIATOR_INDEX(reply_word);
cmd = &priv->hw->cmd_buf[index];
if (IsScsi(priv)) {
SCSI_CMD *scsi_cmd = (SCSI_CMD *)cmd->cmd;
cdb = scsi_cmd->CDB;
lun = get2bytes(scsi_cmd->LogicalUnitNumber, 0);
tag = scsi_cmd->Tag;
task_mgmt = scsi_cmd->TaskManagementFlags;
dl = 0;
/*TRACE_DBG("AliasID %d, %d", scsi_cmd->AliasID, priv->port_id);*/
if (reply_word & TARGET_MODE_REPLY_ALIAS_MASK) {
alias = (scsi_cmd->AliasID - priv->port_id) & 15;
sprintf(alias_lun, "alias %d lun %d", alias, lun);
} else {
alias = 0;
sprintf(alias_lun, "lun %d", lun);
}
} else if (IsSas(priv)) {
SSP_CMD *ssp_cmd = (SSP_CMD *)cmd->cmd;
cdb = ssp_cmd->CDB;
lun = get2bytes(ssp_cmd->LogicalUnitNumber, 0);
if (ssp_cmd->FrameType == SSP_TASK_FRAME) {
SSP_TASK *ssp_task = (SSP_TASK *)cmd->cmd;
tag = ssp_task->ManagedTaskTag;
task_mgmt = ssp_task->TaskManagementFunction;
} else {
tag = ssp_cmd->InitiatorTag;
task_mgmt = 0;
}
dl = 0;
alias = 0;
sprintf(alias_lun, "lun %d", lun);
} else {
FCP_CMD *fcp_cmd = (FCP_CMD *)cmd->cmd;
cdb = fcp_cmd->FcpCdb;
lun = get2bytes(fcp_cmd->FcpLun, 0);
tag = 0;
task_mgmt = fcp_cmd->FcpCntl[2];
dl = be32_to_cpu(fcp_cmd->FcpDl);
if (reply_word & TARGET_MODE_REPLY_ALIAS_MASK) {
alias = fcp_cmd->AliasIndex;
sprintf(alias_lun, "alias %d lun %d", alias, lun);
} else {
alias = 0;
sprintf(alias_lun, "lun %d", lun);
}
}
cmd->reply_word = reply_word;
cmd->alias = alias;
cmd->lun = lun;
cmd->tag = tag;
TRACE_DBG("%s: cmd %p, re_word %x, alias %x, lun %x, tag %x,"
"%s, init_idx %d, %p, %d",
ioc->name, cmd, reply_word, alias, lun, tag, alias_lun,
init_index, priv->scst_cmd[index], dl);
mpt_cmd->CMD = cmd;
{
uint16_t _lun = lun;
_lun = swab16(le16_to_cpu(_lun));
scst_cmd = scst_rx_cmd(sess->scst_sess, (uint8_t *)&_lun,
sizeof(_lun), cdb, MPT_MAX_CDB_LEN, SCST_ATOMIC);
}
if (scst_cmd == NULL) {
PRINT_ERROR(MYNAM ": scst_rx_cmd() failed for %p", cmd);
goto out;
}
TRACE_DBG("scst cmd %p, index %d", priv->scst_cmd[index], index);
WARN_ON(priv->scst_cmd[index] != NULL);
priv->scst_cmd[index] = scst_cmd;
scst_cmd_set_tag(scst_cmd, tag);
scst_cmd_set_tgt_priv(scst_cmd, mpt_cmd);
/* FIXME scst_cmd_set_expected */
out:
TRACE_EXIT();
return scst_cmd;
}
static void mpt_send_busy(struct mpt_cmd *cmd)
{
stmapp_set_status(cmd->priv, cmd->CMD, STS_BUSY);
}
static void mpt_alloc_session_done(struct scst_session *scst_sess, void *data,
int result)
{
struct mpt_sess *sess = (struct mpt_sess *) data;
struct mpt_tgt *tgt = sess->tgt;
struct mpt_cmd *cmd = NULL;
int rc = 0;
TRACE_ENTRY();
if (result == 0) {
while (!list_empty(&sess->delayed_cmds)) {
cmd = list_entry(sess->delayed_cmds.next,
typeof(*cmd), delayed_cmds_entry);
list_del(&cmd->delayed_cmds_entry);
if (rc == 0)
rc = mpt_send_cmd_to_scst(cmd, SCST_CONTEXT_THREAD);
if (rc != 0) {
PRINT_INFO(MYNAM ": Unable to get the command, sending BUSY state %p",
cmd);
mpt_send_busy(cmd);
kfree(cmd);
}
}
__clear_bit(MPT_SESS_INITING, &sess->sess_flags);
} else {
PRINT_INFO(MYNAM ": Session initialization failed, "
"sending BUSY status to all deferred commands %p",
cmd);
while (!list_empty(&sess->delayed_cmds)) {
cmd = list_entry(sess->delayed_cmds.next,
typeof(*cmd), delayed_cmds_entry);
list_del(&cmd->delayed_cmds_entry);
TRACE(TRACE_MGMT, "Command <%p> Busy", cmd);
mpt_send_busy(cmd);
kfree(cmd);
}
tgt->sess[sess->init_index] = NULL;
TRACE_MEM("kfree for sess %p", sess);
kfree(sess);
if (atomic_dec_and_test(&tgt->sess_count))
wake_up_all(&tgt->waitQ);
}
TRACE_EXIT();
return;
}
static int mpt_send_cmd_to_scst(struct mpt_cmd *cmd,
enum scst_exec_context context)
{
int res = 0;
TRACE_ENTRY();
cmd->scst_cmd = _stm_target_command(cmd->priv, cmd->reply_word, cmd);
if (cmd->scst_cmd == NULL) {
res = -EFAULT;
goto out;
}
#ifdef DEBUG_WORK_IN_THREAD
context = SCST_CONTEXT_THREAD;
#endif
scst_cmd_init_done(cmd->scst_cmd, context);
out:
TRACE_EXIT_RES(res);
return res;
}
static void stm_send_target_status_deferred(MPT_STM_PRIV *priv, u32 reply_word,
int index)
{
int ret = 0;
MPT_ADAPTER *ioc = priv->ioc;
MPT_FRAME_HDR *mf;
TargetStatusSendRequest_t *req;
TRACE_ENTRY();
mf = priv->status_deferred_mf[index];
TRACE_DBG("mf %p, index %d", mf, index);
req = (TargetStatusSendRequest_t *)mf;
priv->io_state[index] |= IO_STATE_STATUS_SENT;
priv->current_mf[index] = mf;
priv->status_deferred_mf[index] = NULL;
if (priv->io_state[index] & IO_STATE_HIGH_PRIORITY) {
ret = mpt_send_handshake_request(stm_context, _IOC_ID,
sizeof(*req), (u32 *)req _HS_SLEEP);
} else {
mpt_put_msg_frame(stm_context, _IOC_ID, mf);
}
TRACE_EXIT_RES(ret);
}
static void stm_data_done(MPT_ADAPTER *ioc, u32 reply_word,
struct scst_cmd *scst_cmd, struct mpt_cmd *cmd,
int index)
{
MPT_STM_PRIV *priv = mpt_stm_priv[ioc->id];
TRACE_ENTRY();
TRACE_DBG("scst cmd %p, index %d, data done", scst_cmd, index);
if (scst_cmd_get_resp_data_len(scst_cmd) > 0) {
TRACE_DBG("clear the data flags <%p>", scst_cmd);
sBUG_ON(scst_cmd_get_sg_cnt(scst_cmd) == 0);
pci_unmap_sg(priv->ioc->pcidev,
scst_cmd_get_sg(scst_cmd),
scst_cmd_get_sg_cnt(scst_cmd),
scst_to_tgt_dma_dir(scst_cmd_get_data_direction(scst_cmd)));
}
TRACE_EXIT();
}
static void stm_tgt_reply(MPT_ADAPTER *ioc, u32 reply_word)
{
MPT_STM_PRIV *priv = mpt_stm_priv[ioc->id];
int index, init_index;
enum scst_exec_context context;
struct scst_cmd *scst_cmd;
struct mpt_cmd *cmd;
volatile int *io_state;
TRACE_ENTRY();
#ifdef DEBUG_WORK_IN_THREAD
context = SCST_CONTEXT_THREAD;
#else
context = SCST_CONTEXT_TASKLET;
#endif
index = GET_IO_INDEX(reply_word);
init_index = GET_INITIATOR_INDEX(reply_word);
scst_cmd = priv->scst_cmd[index];
io_state = priv->io_state + index;
TRACE_DBG("index %d, state %x, scst cmd %p, current_mf %p",
index, *io_state, scst_cmd, priv->current_mf[index]);
/*
* if scst_cmd is NULL it show the command buffer not using by
* SCST, let parse the CDB
*/
if (scst_cmd == NULL) {
WARN_ON((*io_state & ~IO_STATE_HIGH_PRIORITY) != IO_STATE_POSTED);
*io_state &= ~IO_STATE_POSTED;
mpt_msg_frame_free(priv, index);
stmapp_tgt_command(priv, reply_word);
goto out;
}
cmd = (struct mpt_cmd *)scst_cmd_get_tgt_priv(scst_cmd);
TRACE_DBG("scst cmd %p, index %d, cmd %p, cmd state %s",
scst_cmd, index, cmd, mpt_state_string[cmd->state]);
if (cmd->state == MPT_STATE_NEED_DATA) {
int rx_status = SCST_RX_STATUS_SUCCESS;
cmd->state = MPT_STATE_DATA_IN;
TRACE_DBG("Data received, context %x, rx_status %d",
context, rx_status);
sBUG_ON(!(*io_state & IO_STATE_DATA_SENT));
mpt_msg_frame_free(priv, index);
if (*io_state & IO_STATE_DATA_SENT) {
*io_state &= ~IO_STATE_DATA_SENT;
stm_data_done(ioc, reply_word, scst_cmd, cmd, index);
}
#if 0
if ((*io_state & ~IO_STATE_HIGH_PRIORITY) == IO_STATE_AUTO_REPOST) {
TRACE_DBG("%s", "io state auto repost");
*io_state = IO_STATE_POSTED;
} else if ((*io_state & ~IO_STATE_HIGH_PRIORITY) == 0) {
TRACE_DBG("%s", "io state");
stm_cmd_buf_post(priv, index);
}
#endif
scst_rx_data(scst_cmd, rx_status, context);
goto out;
}
if (*io_state & IO_STATE_STATUS_SENT) {
/*
* status (and maybe data too) was being sent, so repost the
* command buffer
*/
*io_state &= ~IO_STATE_STATUS_SENT;
mpt_free_msg_frame(_HANDLE_IOC_ID, priv->current_mf[index]);
if (*io_state & IO_STATE_DATA_SENT) {
*io_state &= ~IO_STATE_DATA_SENT;
stm_data_done(ioc, reply_word, scst_cmd, cmd, index);
}
TRACE_DBG("set priv->scst_cmd[%d] = NULL", index);
priv->scst_cmd[index] = NULL;
if ((*io_state & ~IO_STATE_HIGH_PRIORITY) == IO_STATE_AUTO_REPOST) {
TRACE_DBG("%s", "io state auto repost");
*io_state = IO_STATE_POSTED;
} else if ((*io_state & ~IO_STATE_HIGH_PRIORITY) == 0) {
TRACE_DBG("%s", "io state");
stm_cmd_buf_post(priv, index);
}
/*
* figure out how we're handling cached sense data.
*/
if (IsScsi(priv)) {
switch (atomic_read(&priv->pending_sense[init_index])) {
/* attempt to send status and sense succeeded */
case MPT_STATUS_SENSE_ATTEMPT:
atomic_set(&priv->pending_sense[init_index],
MPT_STATUS_SENSE_IDLE);
/* ToDo: check and set scst_set_delivery_status(), if necessary */
scst_tgt_cmd_done(scst_cmd, context);
break;
/* we tried to send status and sense
* simltaneously and failed. Prepare to handle
* the next command without SCST if it is
* REQUEST_SENSE */
case MPT_STATUS_SENSE_NOT_SENT:
atomic_set(&priv->pending_sense[init_index],
MPT_STATUS_SENSE_HANDLE_RQ);
/* ToDo: check and set scst_set_delivery_status(), if necessary */
scst_tgt_cmd_done(scst_cmd, context);
break;
/* we've handled REQUEST_SENSE ourselves and
* we're done with the command. Clean up */
case MPT_STATUS_SENSE_HANDLE_RQ:
TRACE_DBG("%s: clearing pending sense",
ioc->name);
atomic_set(&priv->pending_sense[init_index],
MPT_STATUS_SENSE_IDLE);
mpt_on_free_cmd(scst_cmd);
/* scst_cmd alloced in stmapp_pending_sense */
kfree(scst_cmd);
break;
default:
/* nothing much to do here, we aren't
* handling cached sense/status */
/* ToDo: check and set scst_set_delivery_status(), if necessary */
scst_tgt_cmd_done(scst_cmd, context);
break;
}
} else {
/* ToDo: check and set scst_set_delivery_status(), if necessary */
scst_tgt_cmd_done(scst_cmd, context);
}
goto out;
}
/*
* data (but not status) was being sent, so if status needs to be
* set now, go ahead and do it; otherwise do nothing
*/
if (*io_state & IO_STATE_DATA_SENT) {
*io_state &= ~IO_STATE_DATA_SENT;
mpt_free_msg_frame(_HANDLE_IOC_ID, priv->current_mf[index]);
stm_data_done(ioc, reply_word, scst_cmd, cmd, index);
if (*io_state & IO_STATE_STATUS_DEFERRED) {
*io_state &= ~IO_STATE_STATUS_DEFERRED;
stm_send_target_status_deferred(priv, reply_word, index);
}
cmd->state = MPT_STATE_PROCESSED;
goto out;
}
/*
* just insert into list
* bug how can i handle it
*/
if (*io_state == 0 && cmd->state == MPT_STATE_NEW) {
WARN_ON(1);
goto out;
}
#if 0
if (*io_state == IO_STATE_POSTED) {
TRACE_DBG("%s", "io state posted");
/*
* command buffer was posted, so we now have a SCSI command
*/
*io_state &= ~IO_STATE_POSTED;
goto out;
}
#endif
WARN_ON(1);
out:
TRACE_EXIT();
}
static int mpt_is_task_mgm(MPT_STM_PRIV *priv, u32 reply_word, int *lun)
{
int task_mgmt = 0, index;
CMD *cmd;
/*struct mpt_tgt *tgt = priv->tgt;*/
TRACE_ENTRY();
index = GET_IO_INDEX(reply_word);
cmd = &priv->hw->cmd_buf[index];
if (IsScsi(priv)) {
SCSI_CMD *scsi_cmd = (SCSI_CMD *)cmd->cmd;
task_mgmt = scsi_cmd->TaskManagementFlags;
*lun = get2bytes(scsi_cmd->LogicalUnitNumber, 0);
} else if (IsSas(priv)) {
SSP_CMD *ssp_cmd = (SSP_CMD *)cmd->cmd;
if (ssp_cmd->FrameType == SSP_TASK_FRAME) {
SSP_TASK *ssp_task = (SSP_TASK *)cmd->cmd;
task_mgmt = ssp_task->TaskManagementFunction;
}
*lun = get2bytes(ssp_cmd->LogicalUnitNumber, 0);
} else {
FCP_CMD *fcp_cmd = (FCP_CMD *)cmd->cmd;
task_mgmt = fcp_cmd->FcpCntl[2];
*lun = get2bytes(fcp_cmd->FcpLun, 0);
}
TRACE_EXIT_RES(task_mgmt);
return task_mgmt;
}
static void stmapp_tgt_command(MPT_STM_PRIV *priv, u32 reply_word)
{
struct mpt_tgt *tgt = NULL;
struct mpt_sess *sess = NULL;
struct mpt_cmd *cmd = NULL;
int init_index, res = 0, task_mgmt, lun;
TRACE_ENTRY();
tgt = priv->tgt;
task_mgmt = mpt_is_task_mgm(priv, reply_word, &lun);
if (task_mgmt)
mpt_handle_task_mgmt(priv, reply_word, task_mgmt, lun);
init_index = GET_INITIATOR_INDEX(reply_word);
if (test_bit(MPT_TGT_SHUTDOWN, &tgt->tgt_flags)) {
TRACE_DBG("New command while the device %p is shutting down", tgt);
res = -EFAULT;
goto out;
}
cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
TRACE_MEM("kmalloc(GFP_ATOMIC) for cmd (%zd): %p", sizeof(*cmd), cmd);
if (cmd == NULL) {
TRACE(TRACE_OUT_OF_MEM, "%s", "Allocation of cmd failed");
res = -ENOMEM;
goto out;
}
memset(cmd, 0, sizeof(*cmd));
cmd->priv = priv;
cmd->reply_word = reply_word;
cmd->state = MPT_STATE_NEW;
sess = tgt->sess[init_index];
if (sess == NULL) {
sess = kmalloc(sizeof(*sess), GFP_ATOMIC);
if (sess == NULL) {
TRACE(TRACE_OUT_OF_MEM, "%s",
"Allocation of sess failed");
res = -ENOMEM;
goto out_free_cmd;
}
/* WWPN */
atomic_inc(&tgt->sess_count);
smp_mb__after_atomic_inc();
memset(sess, 0, sizeof(*sess));
sess->tgt = tgt;
sess->init_index = init_index;
INIT_LIST_HEAD(&sess->delayed_cmds);
sess->scst_sess = scst_register_session(tgt->scst_tgt, 1,
"", sess, sess,
mpt_alloc_session_done);
if (sess->scst_sess == NULL) {
PRINT_ERROR(MYNAM ": scst_register_session failed %p",
tgt);
res = -EFAULT;
goto out_free_sess;
}
__set_bit(MPT_SESS_INITING, &sess->sess_flags);
tgt->sess[init_index] = sess;
cmd->sess = sess;
list_add_tail(&cmd->delayed_cmds_entry, &sess->delayed_cmds);
goto out;
}
/* seesion is ready let us do it */
cmd->sess = sess;
if (test_bit(MPT_SESS_INITING, &sess->sess_flags)) {
list_add_tail(&cmd->delayed_cmds_entry, &sess->delayed_cmds);
} else {
/* if there is pending sense left over from the last command,
* we need to send that if this is a REQUEST SENSE command.
* Otherwise send the command to SCST */
if (!stmapp_pending_sense(cmd)) {
res = mpt_send_cmd_to_scst(cmd, SCST_CONTEXT_TASKLET);
/*res = mpt_send_cmd_to_scst(cmd, SCST_CONTEXT_DIRECT_ATOMIC);*/