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/*
* Copyright (c) 2010, LSI Corp.
* All rights reserved.
* Author : Manjunath Ranganathaiah
* Support: freebsdraid@lsi.com
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of the <ORGANIZATION> nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/dev/tws/tws_user.c 241764 2012-10-20 07:39:47Z delphij $
*/
#include <dev/tws/tws.h>
#include <dev/tws/tws_services.h>
#include <dev/tws/tws_hdm.h>
#include <dev/tws/tws_user.h>
int tws_ioctl(struct cdev *dev, long unsigned int cmd, caddr_t buf, int flags,
d_thread_t *proc);
void tws_passthru_complete(struct tws_request *req);
extern void tws_circular_aenq_insert(struct tws_softc *sc,
struct tws_circular_q *cq, struct tws_event_packet *aen);
static int tws_passthru(struct tws_softc *sc, void *buf);
static int tws_ioctl_aen(struct tws_softc *sc, u_long cmd, void *buf);
extern int tws_bus_scan(struct tws_softc *sc);
extern struct tws_request *tws_get_request(struct tws_softc *sc,
u_int16_t type);
extern int32_t tws_map_request(struct tws_softc *sc, struct tws_request *req);
extern void tws_unmap_request(struct tws_softc *sc, struct tws_request *req);
extern uint8_t tws_get_state(struct tws_softc *sc);
extern void tws_timeout(void *arg);
int
tws_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, int flags,
d_thread_t *proc)
{
struct tws_softc *sc = (struct tws_softc *)(dev->si_drv1);
int error;
TWS_TRACE_DEBUG(sc, "entry", sc, cmd);
sc->stats.ioctls++;
switch(cmd) {
case TWS_IOCTL_FIRMWARE_PASS_THROUGH :
error = tws_passthru(sc, (void *)buf);
break;
case TWS_IOCTL_SCAN_BUS :
TWS_TRACE_DEBUG(sc, "scan-bus", 0, 0);
mtx_lock(&sc->sim_lock);
error = tws_bus_scan(sc);
mtx_unlock(&sc->sim_lock);
break;
default :
TWS_TRACE_DEBUG(sc, "ioctl-aen", cmd, buf);
error = tws_ioctl_aen(sc, cmd, (void *)buf);
break;
}
return(error);
}
static int
tws_passthru(struct tws_softc *sc, void *buf)
{
struct tws_request *req;
struct tws_ioctl_no_data_buf *ubuf = (struct tws_ioctl_no_data_buf *)buf;
int error;
u_int16_t lun4;
if ( tws_get_state(sc) != TWS_ONLINE) {
return(EBUSY);
}
//==============================================================================================
// Get a command
//
do {
req = tws_get_request(sc, TWS_REQ_TYPE_PASSTHRU);
if ( !req ) {
sc->chan = (void *)sc;
error = tsleep(sc->chan, 0, "tws_sleep", TWS_IOCTL_TIMEOUT*hz);
if ( error == EWOULDBLOCK ) {
return(ETIMEDOUT);
}
} else {
// Make sure we are still ready for new commands...
if ( tws_get_state(sc) != TWS_ONLINE) {
return(EBUSY);
}
break;
}
} while(1);
req->length = (ubuf->driver_pkt.buffer_length + 511) & ~511;
TWS_TRACE_DEBUG(sc, "datal,rid", req->length, req->request_id);
if ( req->length ) {
req->data = sc->ioctl_data_mem;
req->dma_map = sc->ioctl_data_map;
//==========================================================================================
// Copy data in from user space
//
error = copyin(ubuf->pdata, req->data, req->length);
}
//==============================================================================================
// Set command fields
//
req->flags = TWS_DIR_IN | TWS_DIR_OUT;
req->cb = tws_passthru_complete;
memcpy(&req->cmd_pkt->cmd, &ubuf->cmd_pkt.cmd,
sizeof(struct tws_command_apache));
if ( GET_OPCODE(req->cmd_pkt->cmd.pkt_a.res__opcode) ==
TWS_FW_CMD_EXECUTE_SCSI ) {
lun4 = req->cmd_pkt->cmd.pkt_a.lun_l4__req_id & 0xF000;
req->cmd_pkt->cmd.pkt_a.lun_l4__req_id = lun4 | req->request_id;
} else {
req->cmd_pkt->cmd.pkt_g.generic.request_id = (u_int8_t) req->request_id;
}
//==============================================================================================
// Send command to controller
//
error = tws_map_request(sc, req);
if (error) {
ubuf->driver_pkt.os_status = error;
goto out_data;
}
if ( req->state == TWS_REQ_STATE_COMPLETE ) {
ubuf->driver_pkt.os_status = req->error_code;
goto out_unmap;
}
mtx_lock(&sc->gen_lock);
error = mtx_sleep(req, &sc->gen_lock, 0, "tws_passthru", TWS_IOCTL_TIMEOUT*hz);
mtx_unlock(&sc->gen_lock);
if (( req->state != TWS_REQ_STATE_COMPLETE ) && ( error == EWOULDBLOCK )) {
TWS_TRACE_DEBUG(sc, "msleep timeout", error, req->request_id);
tws_timeout((void*) req);
}
out_unmap:
if ( req->error_code == TWS_REQ_RET_RESET ) {
error = EBUSY;
req->error_code = EBUSY;
TWS_TRACE_DEBUG(sc, "ioctl reset", error, req->request_id);
}
tws_unmap_request(sc, req);
//==============================================================================================
// Return command status to user space
//
memcpy(&ubuf->cmd_pkt.hdr, &req->cmd_pkt->hdr, sizeof(struct tws_command_apache));
memcpy(&ubuf->cmd_pkt.cmd, &req->cmd_pkt->cmd, sizeof(struct tws_command_apache));
out_data:
if ( req->length ) {
//==========================================================================================
// Copy data out to user space
//
if ( !error )
error = copyout(req->data, ubuf->pdata, ubuf->driver_pkt.buffer_length);
}
if ( error )
TWS_TRACE_DEBUG(sc, "errored", error, 0);
if ( req->error_code != TWS_REQ_RET_SUBMIT_SUCCESS )
ubuf->driver_pkt.os_status = error;
//==============================================================================================
// Free command
//
req->state = TWS_REQ_STATE_FREE;
wakeup_one(sc->chan);
return(error);
}
void
tws_passthru_complete(struct tws_request *req)
{
req->state = TWS_REQ_STATE_COMPLETE;
wakeup_one(req);
}
static void
tws_retrive_aen(struct tws_softc *sc, u_long cmd,
struct tws_ioctl_packet *ubuf)
{
u_int16_t index=0;
struct tws_event_packet eventp, *qp;
if ( sc->aen_q.head == sc->aen_q.tail ) {
ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
return;
}
ubuf->driver_pkt.status = 0;
/*
* once this flag is set cli will not display alarms
* needs a revisit from tools?
*/
if ( sc->aen_q.overflow ) {
ubuf->driver_pkt.status = TWS_AEN_OVERFLOW;
sc->aen_q.overflow = 0; /* reset */
}
qp = (struct tws_event_packet *)sc->aen_q.q;
switch (cmd) {
case TWS_IOCTL_GET_FIRST_EVENT :
index = sc->aen_q.head;
break;
case TWS_IOCTL_GET_LAST_EVENT :
/* index = tail-1 */
index = (sc->aen_q.depth + sc->aen_q.tail - 1) % sc->aen_q.depth;
break;
case TWS_IOCTL_GET_NEXT_EVENT :
memcpy(&eventp, ubuf->data_buf, sizeof(struct tws_event_packet));
index = sc->aen_q.head;
do {
if ( qp[index].sequence_id ==
(eventp.sequence_id + 1) )
break;
index = (index+1) % sc->aen_q.depth;
}while ( index != sc->aen_q.tail );
if ( index == sc->aen_q.tail ) {
ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
return;
}
break;
case TWS_IOCTL_GET_PREVIOUS_EVENT :
memcpy(&eventp, ubuf->data_buf, sizeof(struct tws_event_packet));
index = sc->aen_q.head;
do {
if ( qp[index].sequence_id ==
(eventp.sequence_id - 1) )
break;
index = (index+1) % sc->aen_q.depth;
}while ( index != sc->aen_q.tail );
if ( index == sc->aen_q.tail ) {
ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
return;
}
break;
default :
TWS_TRACE_DEBUG(sc, "not a valid event", sc, cmd);
ubuf->driver_pkt.status = TWS_AEN_NO_EVENTS;
return;
}
memcpy(ubuf->data_buf, &qp[index],
sizeof(struct tws_event_packet));
qp[index].retrieved = TWS_AEN_RETRIEVED;
return;
}
static int
tws_ioctl_aen(struct tws_softc *sc, u_long cmd, void *buf)
{
struct tws_ioctl_packet *ubuf = (struct tws_ioctl_packet *)buf;
struct tws_compatibility_packet cpkt;
struct tws_lock_packet lpkt;
time_t ctime;
mtx_lock(&sc->gen_lock);
ubuf->driver_pkt.status = 0;
switch(cmd) {
case TWS_IOCTL_GET_FIRST_EVENT :
case TWS_IOCTL_GET_LAST_EVENT :
case TWS_IOCTL_GET_NEXT_EVENT :
case TWS_IOCTL_GET_PREVIOUS_EVENT :
tws_retrive_aen(sc,cmd,ubuf);
break;
case TWS_IOCTL_GET_LOCK :
ctime = TWS_LOCAL_TIME;
memcpy(&lpkt, ubuf->data_buf, sizeof(struct tws_lock_packet));
if ( (sc->ioctl_lock.lock == TWS_IOCTL_LOCK_FREE) ||
(lpkt.force_flag) ||
(ctime >= sc->ioctl_lock.timeout) ) {
sc->ioctl_lock.lock = TWS_IOCTL_LOCK_HELD;
sc->ioctl_lock.timeout = ctime + (lpkt.timeout_msec / 1000);
lpkt.time_remaining_msec = lpkt.timeout_msec;
} else {
lpkt.time_remaining_msec = (u_int32_t)
((sc->ioctl_lock.timeout - ctime) * 1000);
ubuf->driver_pkt.status = TWS_IOCTL_LOCK_ALREADY_HELD;
}
break;
case TWS_IOCTL_RELEASE_LOCK :
if (sc->ioctl_lock.lock == TWS_IOCTL_LOCK_FREE) {
ubuf->driver_pkt.status = TWS_IOCTL_LOCK_NOT_HELD;
} else {
sc->ioctl_lock.lock = TWS_IOCTL_LOCK_FREE;
ubuf->driver_pkt.status = 0;
}
break;
case TWS_IOCTL_GET_COMPATIBILITY_INFO :
TWS_TRACE_DEBUG(sc, "get comp info", sc, cmd);
memcpy( cpkt.driver_version, TWS_DRIVER_VERSION_STRING,
sizeof(TWS_DRIVER_VERSION_STRING));
cpkt.working_srl = sc->cinfo.working_srl;
cpkt.working_branch = sc->cinfo.working_branch;
cpkt.working_build = sc->cinfo.working_build;
cpkt.driver_srl_high = TWS_CURRENT_FW_SRL;
cpkt.driver_branch_high = TWS_CURRENT_FW_BRANCH;
cpkt.driver_build_high = TWS_CURRENT_FW_BUILD;
cpkt.driver_srl_low = TWS_BASE_FW_SRL;
cpkt.driver_branch_low = TWS_BASE_FW_BRANCH;
cpkt.driver_build_low = TWS_BASE_FW_BUILD;
cpkt.fw_on_ctlr_srl = sc->cinfo.fw_on_ctlr_srl;
cpkt.fw_on_ctlr_branch = sc->cinfo.fw_on_ctlr_branch;
cpkt.fw_on_ctlr_build = sc->cinfo.fw_on_ctlr_build;
ubuf->driver_pkt.status = 0;
int len = sizeof(struct tws_compatibility_packet);
if ( ubuf->driver_pkt.buffer_length < len )
len = ubuf->driver_pkt.buffer_length;
memcpy(ubuf->data_buf, &cpkt, len);
break;
default :
TWS_TRACE_DEBUG(sc, "not valid cmd", cmd,
TWS_IOCTL_GET_COMPATIBILITY_INFO);
break;
}
mtx_unlock(&sc->gen_lock);
return(SUCCESS);
}
void
tws_circular_aenq_insert(struct tws_softc *sc, struct tws_circular_q *cq,
struct tws_event_packet *aen)
{
struct tws_event_packet *q = (struct tws_event_packet *)cq->q;
volatile u_int16_t head, tail;
u_int8_t retr;
mtx_assert(&sc->gen_lock, MA_OWNED);
head = cq->head;
tail = cq->tail;
retr = q[tail].retrieved;
memcpy(&q[tail], aen, sizeof(struct tws_event_packet));
tail = (tail+1) % cq->depth;
if ( head == tail ) { /* q is full */
if ( retr != TWS_AEN_RETRIEVED )
cq->overflow = 1;
cq->head = (head+1) % cq->depth;
}
cq->tail = tail;
}