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freebsd-dev/sys/dev/tws/tws.c
Pedro F. Giffuni 7282444b10 sys/dev: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:36:21 +00:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <dev/tws/tws.h>
#include <dev/tws/tws_services.h>
#include <dev/tws/tws_hdm.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
MALLOC_DEFINE(M_TWS, "twsbuf", "buffers used by tws driver");
int tws_queue_depth = TWS_MAX_REQS;
int tws_enable_msi = 0;
int tws_enable_msix = 0;
/* externs */
extern int tws_cam_attach(struct tws_softc *sc);
extern void tws_cam_detach(struct tws_softc *sc);
extern int tws_init_ctlr(struct tws_softc *sc);
extern boolean tws_ctlr_ready(struct tws_softc *sc);
extern void tws_turn_off_interrupts(struct tws_softc *sc);
extern void tws_q_insert_tail(struct tws_softc *sc, struct tws_request *req,
u_int8_t q_type );
extern struct tws_request *tws_q_remove_request(struct tws_softc *sc,
struct tws_request *req, u_int8_t q_type );
extern struct tws_request *tws_q_remove_head(struct tws_softc *sc,
u_int8_t q_type );
extern boolean tws_get_response(struct tws_softc *sc, u_int16_t *req_id);
extern boolean tws_ctlr_reset(struct tws_softc *sc);
extern void tws_intr(void *arg);
extern int tws_use_32bit_sgls;
struct tws_request *tws_get_request(struct tws_softc *sc, u_int16_t type);
int tws_init_connect(struct tws_softc *sc, u_int16_t mc);
void tws_send_event(struct tws_softc *sc, u_int8_t event);
uint8_t tws_get_state(struct tws_softc *sc);
void tws_release_request(struct tws_request *req);
/* Function prototypes */
static d_open_t tws_open;
static d_close_t tws_close;
static d_read_t tws_read;
static d_write_t tws_write;
extern d_ioctl_t tws_ioctl;
static int tws_init(struct tws_softc *sc);
static void tws_dmamap_cmds_load_cbfn(void *arg, bus_dma_segment_t *segs,
int nseg, int error);
static int tws_init_reqs(struct tws_softc *sc, u_int32_t dma_mem_size);
static int tws_init_aen_q(struct tws_softc *sc);
static int tws_init_trace_q(struct tws_softc *sc);
static int tws_setup_irq(struct tws_softc *sc);
int tws_setup_intr(struct tws_softc *sc, int irqs);
int tws_teardown_intr(struct tws_softc *sc);
/* Character device entry points */
static struct cdevsw tws_cdevsw = {
.d_version = D_VERSION,
.d_open = tws_open,
.d_close = tws_close,
.d_read = tws_read,
.d_write = tws_write,
.d_ioctl = tws_ioctl,
.d_name = "tws",
};
/*
* In the cdevsw routines, we find our softc by using the si_drv1 member
* of struct cdev. We set this variable to point to our softc in our
* attach routine when we create the /dev entry.
*/
int
tws_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
struct tws_softc *sc = dev->si_drv1;
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", dev, oflags);
return (0);
}
int
tws_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
struct tws_softc *sc = dev->si_drv1;
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", dev, fflag);
return (0);
}
int
tws_read(struct cdev *dev, struct uio *uio, int ioflag)
{
struct tws_softc *sc = dev->si_drv1;
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", dev, ioflag);
return (0);
}
int
tws_write(struct cdev *dev, struct uio *uio, int ioflag)
{
struct tws_softc *sc = dev->si_drv1;
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", dev, ioflag);
return (0);
}
/* PCI Support Functions */
/*
* Compare the device ID of this device against the IDs that this driver
* supports. If there is a match, set the description and return success.
*/
static int
tws_probe(device_t dev)
{
static u_int8_t first_ctlr = 1;
if ((pci_get_vendor(dev) == TWS_VENDOR_ID) &&
(pci_get_device(dev) == TWS_DEVICE_ID)) {
device_set_desc(dev, "LSI 3ware SAS/SATA Storage Controller");
if (first_ctlr) {
printf("LSI 3ware device driver for SAS/SATA storage "
"controllers, version: %s\n", TWS_DRIVER_VERSION_STRING);
first_ctlr = 0;
}
return(BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
/* Attach function is only called if the probe is successful. */
static int
tws_attach(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
u_int32_t bar;
int error=0,i;
/* no tracing yet */
/* Look up our softc and initialize its fields. */
sc->tws_dev = dev;
sc->device_id = pci_get_device(dev);
sc->subvendor_id = pci_get_subvendor(dev);
sc->subdevice_id = pci_get_subdevice(dev);
/* Intialize mutexes */
mtx_init( &sc->q_lock, "tws_q_lock", NULL, MTX_DEF);
mtx_init( &sc->sim_lock, "tws_sim_lock", NULL, MTX_DEF);
mtx_init( &sc->gen_lock, "tws_gen_lock", NULL, MTX_DEF);
mtx_init( &sc->io_lock, "tws_io_lock", NULL, MTX_DEF | MTX_RECURSE);
callout_init(&sc->stats_timer, 1);
if ( tws_init_trace_q(sc) == FAILURE )
printf("trace init failure\n");
/* send init event */
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_INIT_START);
mtx_unlock(&sc->gen_lock);
#if _BYTE_ORDER == _BIG_ENDIAN
TWS_TRACE(sc, "BIG endian", 0, 0);
#endif
/* sysctl context setup */
sysctl_ctx_init(&sc->tws_clist);
sc->tws_oidp = SYSCTL_ADD_NODE(&sc->tws_clist,
SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
device_get_nameunit(dev),
CTLFLAG_RD, 0, "");
if ( sc->tws_oidp == NULL ) {
tws_log(sc, SYSCTL_TREE_NODE_ADD);
goto attach_fail_1;
}
SYSCTL_ADD_STRING(&sc->tws_clist, SYSCTL_CHILDREN(sc->tws_oidp),
OID_AUTO, "driver_version", CTLFLAG_RD,
TWS_DRIVER_VERSION_STRING, 0, "TWS driver version");
pci_enable_busmaster(dev);
bar = pci_read_config(dev, TWS_PCI_BAR0, 4);
TWS_TRACE_DEBUG(sc, "bar0 ", bar, 0);
bar = pci_read_config(dev, TWS_PCI_BAR1, 4);
bar = bar & ~TWS_BIT2;
TWS_TRACE_DEBUG(sc, "bar1 ", bar, 0);
/* MFA base address is BAR2 register used for
* push mode. Firmware will evatualy move to
* pull mode during witch this needs to change
*/
#ifndef TWS_PULL_MODE_ENABLE
sc->mfa_base = (u_int64_t)pci_read_config(dev, TWS_PCI_BAR2, 4);
sc->mfa_base = sc->mfa_base & ~TWS_BIT2;
TWS_TRACE_DEBUG(sc, "bar2 ", sc->mfa_base, 0);
#endif
/* allocate MMIO register space */
sc->reg_res_id = TWS_PCI_BAR1; /* BAR1 offset */
if ((sc->reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&(sc->reg_res_id), RF_ACTIVE))
== NULL) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_1;
}
sc->bus_tag = rman_get_bustag(sc->reg_res);
sc->bus_handle = rman_get_bushandle(sc->reg_res);
#ifndef TWS_PULL_MODE_ENABLE
/* Allocate bus space for inbound mfa */
sc->mfa_res_id = TWS_PCI_BAR2; /* BAR2 offset */
if ((sc->mfa_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&(sc->mfa_res_id), RF_ACTIVE))
== NULL) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_2;
}
sc->bus_mfa_tag = rman_get_bustag(sc->mfa_res);
sc->bus_mfa_handle = rman_get_bushandle(sc->mfa_res);
#endif
/* Allocate and register our interrupt. */
sc->intr_type = TWS_INTx; /* default */
if ( tws_enable_msi )
sc->intr_type = TWS_MSI;
if ( tws_setup_irq(sc) == FAILURE ) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_3;
}
/*
* Create a /dev entry for this device. The kernel will assign us
* a major number automatically. We use the unit number of this
* device as the minor number and name the character device
* "tws<unit>".
*/
sc->tws_cdev = make_dev(&tws_cdevsw, device_get_unit(dev),
UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, "tws%u",
device_get_unit(dev));
sc->tws_cdev->si_drv1 = sc;
if ( tws_init(sc) == FAILURE ) {
tws_log(sc, TWS_INIT_FAILURE);
goto attach_fail_4;
}
if ( tws_init_ctlr(sc) == FAILURE ) {
tws_log(sc, TWS_CTLR_INIT_FAILURE);
goto attach_fail_4;
}
if ((error = tws_cam_attach(sc))) {
tws_log(sc, TWS_CAM_ATTACH);
goto attach_fail_4;
}
/* send init complete event */
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_INIT_COMPLETE);
mtx_unlock(&sc->gen_lock);
TWS_TRACE_DEBUG(sc, "attached successfully", 0, sc->device_id);
return(0);
attach_fail_4:
tws_teardown_intr(sc);
destroy_dev(sc->tws_cdev);
if (sc->dma_mem_phys)
bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
if (sc->dma_mem)
bus_dmamem_free(sc->cmd_tag, sc->dma_mem, sc->cmd_map);
if (sc->cmd_tag)
bus_dma_tag_destroy(sc->cmd_tag);
attach_fail_3:
for(i=0;i<sc->irqs;i++) {
if ( sc->irq_res[i] ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i]))
TWS_TRACE(sc, "bus irq res", 0, 0);
}
}
#ifndef TWS_PULL_MODE_ENABLE
attach_fail_2:
#endif
if ( sc->mfa_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res))
TWS_TRACE(sc, "bus release ", 0, sc->mfa_res_id);
}
if ( sc->reg_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res))
TWS_TRACE(sc, "bus release2 ", 0, sc->reg_res_id);
}
attach_fail_1:
mtx_destroy(&sc->q_lock);
mtx_destroy(&sc->sim_lock);
mtx_destroy(&sc->gen_lock);
mtx_destroy(&sc->io_lock);
sysctl_ctx_free(&sc->tws_clist);
return (ENXIO);
}
/* Detach device. */
static int
tws_detach(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
int i;
u_int32_t reg;
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_UNINIT_START);
mtx_unlock(&sc->gen_lock);
/* needs to disable interrupt before detaching from cam */
tws_turn_off_interrupts(sc);
/* clear door bell */
tws_write_reg(sc, TWS_I2O0_HOBDBC, ~0, 4);
reg = tws_read_reg(sc, TWS_I2O0_HIMASK, 4);
TWS_TRACE_DEBUG(sc, "turn-off-intr", reg, 0);
sc->obfl_q_overrun = false;
tws_init_connect(sc, 1);
/* Teardown the state in our softc created in our attach routine. */
/* Disconnect the interrupt handler. */
tws_teardown_intr(sc);
/* Release irq resource */
for(i=0;i<sc->irqs;i++) {
if ( sc->irq_res[i] ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i]))
TWS_TRACE(sc, "bus release irq resource",
i, sc->irq_res_id[i]);
}
}
if ( sc->intr_type == TWS_MSI ) {
pci_release_msi(sc->tws_dev);
}
tws_cam_detach(sc);
if (sc->dma_mem_phys)
bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
if (sc->dma_mem)
bus_dmamem_free(sc->cmd_tag, sc->dma_mem, sc->cmd_map);
if (sc->cmd_tag)
bus_dma_tag_destroy(sc->cmd_tag);
/* Release memory resource */
if ( sc->mfa_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res))
TWS_TRACE(sc, "bus release mem resource", 0, sc->mfa_res_id);
}
if ( sc->reg_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res))
TWS_TRACE(sc, "bus release mem resource", 0, sc->reg_res_id);
}
for ( i=0; i< tws_queue_depth; i++) {
if (sc->reqs[i].dma_map)
bus_dmamap_destroy(sc->data_tag, sc->reqs[i].dma_map);
callout_drain(&sc->reqs[i].timeout);
}
callout_drain(&sc->stats_timer);
free(sc->reqs, M_TWS);
free(sc->sense_bufs, M_TWS);
free(sc->scan_ccb, M_TWS);
if (sc->ioctl_data_mem)
bus_dmamem_free(sc->data_tag, sc->ioctl_data_mem, sc->ioctl_data_map);
if (sc->data_tag)
bus_dma_tag_destroy(sc->data_tag);
free(sc->aen_q.q, M_TWS);
free(sc->trace_q.q, M_TWS);
mtx_destroy(&sc->q_lock);
mtx_destroy(&sc->sim_lock);
mtx_destroy(&sc->gen_lock);
mtx_destroy(&sc->io_lock);
destroy_dev(sc->tws_cdev);
sysctl_ctx_free(&sc->tws_clist);
return (0);
}
int
tws_setup_intr(struct tws_softc *sc, int irqs)
{
int i, error;
for(i=0;i<irqs;i++) {
if (!(sc->intr_handle[i])) {
if ((error = bus_setup_intr(sc->tws_dev, sc->irq_res[i],
INTR_TYPE_CAM | INTR_MPSAFE,
#if (__FreeBSD_version >= 700000)
NULL,
#endif
tws_intr, sc, &sc->intr_handle[i]))) {
tws_log(sc, SETUP_INTR_RES);
return(FAILURE);
}
}
}
return(SUCCESS);
}
int
tws_teardown_intr(struct tws_softc *sc)
{
int i, error;
for(i=0;i<sc->irqs;i++) {
if (sc->intr_handle[i]) {
error = bus_teardown_intr(sc->tws_dev,
sc->irq_res[i], sc->intr_handle[i]);
sc->intr_handle[i] = NULL;
}
}
return(SUCCESS);
}
static int
tws_setup_irq(struct tws_softc *sc)
{
int messages;
switch(sc->intr_type) {
case TWS_INTx :
sc->irqs = 1;
sc->irq_res_id[0] = 0;
sc->irq_res[0] = bus_alloc_resource_any(sc->tws_dev, SYS_RES_IRQ,
&sc->irq_res_id[0], RF_SHAREABLE | RF_ACTIVE);
if ( ! sc->irq_res[0] )
return(FAILURE);
if ( tws_setup_intr(sc, sc->irqs) == FAILURE )
return(FAILURE);
device_printf(sc->tws_dev, "Using legacy INTx\n");
break;
case TWS_MSI :
sc->irqs = 1;
sc->irq_res_id[0] = 1;
messages = 1;
if (pci_alloc_msi(sc->tws_dev, &messages) != 0 ) {
TWS_TRACE(sc, "pci alloc msi fail", 0, messages);
return(FAILURE);
}
sc->irq_res[0] = bus_alloc_resource_any(sc->tws_dev, SYS_RES_IRQ,
&sc->irq_res_id[0], RF_SHAREABLE | RF_ACTIVE);
if ( !sc->irq_res[0] )
return(FAILURE);
if ( tws_setup_intr(sc, sc->irqs) == FAILURE )
return(FAILURE);
device_printf(sc->tws_dev, "Using MSI\n");
break;
}
return(SUCCESS);
}
static int
tws_init(struct tws_softc *sc)
{
u_int32_t max_sg_elements;
u_int32_t dma_mem_size;
int error;
u_int32_t reg;
sc->seq_id = 0;
if ( tws_queue_depth > TWS_MAX_REQS )
tws_queue_depth = TWS_MAX_REQS;
if (tws_queue_depth < TWS_RESERVED_REQS+1)
tws_queue_depth = TWS_RESERVED_REQS+1;
sc->is64bit = (sizeof(bus_addr_t) == 8) ? true : false;
max_sg_elements = (sc->is64bit && !tws_use_32bit_sgls) ?
TWS_MAX_64BIT_SG_ELEMENTS :
TWS_MAX_32BIT_SG_ELEMENTS;
dma_mem_size = (sizeof(struct tws_command_packet) * tws_queue_depth) +
(TWS_SECTOR_SIZE) ;
if ( bus_dma_tag_create(bus_get_dma_tag(sc->tws_dev), /* PCI parent */
TWS_ALIGNMENT, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE, /* maxsize */
max_sg_elements, /* numsegs */
BUS_SPACE_MAXSIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sc->parent_tag /* tag */
)) {
TWS_TRACE_DEBUG(sc, "DMA parent tag Create fail", max_sg_elements,
sc->is64bit);
return(ENOMEM);
}
/* In bound message frame requires 16byte alignment.
* Outbound MF's can live with 4byte alignment - for now just
* use 16 for both.
*/
if ( bus_dma_tag_create(sc->parent_tag, /* parent */
TWS_IN_MF_ALIGNMENT, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
dma_mem_size, /* maxsize */
1, /* numsegs */
BUS_SPACE_MAXSIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sc->cmd_tag /* tag */
)) {
TWS_TRACE_DEBUG(sc, "DMA cmd tag Create fail", max_sg_elements, sc->is64bit);
return(ENOMEM);
}
if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
BUS_DMA_NOWAIT, &sc->cmd_map)) {
TWS_TRACE_DEBUG(sc, "DMA mem alloc fail", max_sg_elements, sc->is64bit);
return(ENOMEM);
}
/* if bus_dmamem_alloc succeeds then bus_dmamap_load will succeed */
sc->dma_mem_phys=0;
error = bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
dma_mem_size, tws_dmamap_cmds_load_cbfn,
&sc->dma_mem_phys, 0);
/*
* Create a dma tag for data buffers; size will be the maximum
* possible I/O size (128kB).
*/
if (bus_dma_tag_create(sc->parent_tag, /* parent */
TWS_ALIGNMENT, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR_32BIT,/* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
TWS_MAX_IO_SIZE, /* maxsize */
max_sg_elements, /* nsegments */
TWS_MAX_IO_SIZE, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
busdma_lock_mutex, /* lockfunc */
&sc->io_lock, /* lockfuncarg */
&sc->data_tag /* tag */)) {
TWS_TRACE_DEBUG(sc, "DMA cmd tag Create fail", max_sg_elements, sc->is64bit);
return(ENOMEM);
}
sc->reqs = malloc(sizeof(struct tws_request) * tws_queue_depth, M_TWS,
M_WAITOK | M_ZERO);
sc->sense_bufs = malloc(sizeof(struct tws_sense) * tws_queue_depth, M_TWS,
M_WAITOK | M_ZERO);
sc->scan_ccb = malloc(sizeof(union ccb), M_TWS, M_WAITOK | M_ZERO);
if (bus_dmamem_alloc(sc->data_tag, (void **)&sc->ioctl_data_mem,
(BUS_DMA_NOWAIT | BUS_DMA_ZERO), &sc->ioctl_data_map)) {
device_printf(sc->tws_dev, "Cannot allocate ioctl data mem\n");
return(ENOMEM);
}
if ( !tws_ctlr_ready(sc) )
if( !tws_ctlr_reset(sc) )
return(FAILURE);
bzero(&sc->stats, sizeof(struct tws_stats));
tws_init_qs(sc);
tws_turn_off_interrupts(sc);
/*
* enable pull mode by setting bit1 .
* setting bit0 to 1 will enable interrupt coalesing
* will revisit.
*/
#ifdef TWS_PULL_MODE_ENABLE
reg = tws_read_reg(sc, TWS_I2O0_CTL, 4);
TWS_TRACE_DEBUG(sc, "i20 ctl", reg, TWS_I2O0_CTL);
tws_write_reg(sc, TWS_I2O0_CTL, reg | TWS_BIT1, 4);
#endif
TWS_TRACE_DEBUG(sc, "dma_mem_phys", sc->dma_mem_phys, TWS_I2O0_CTL);
if ( tws_init_reqs(sc, dma_mem_size) == FAILURE )
return(FAILURE);
if ( tws_init_aen_q(sc) == FAILURE )
return(FAILURE);
return(SUCCESS);
}
static int
tws_init_aen_q(struct tws_softc *sc)
{
sc->aen_q.head=0;
sc->aen_q.tail=0;
sc->aen_q.depth=256;
sc->aen_q.overflow=0;
sc->aen_q.q = malloc(sizeof(struct tws_event_packet)*sc->aen_q.depth,
M_TWS, M_WAITOK | M_ZERO);
return(SUCCESS);
}
static int
tws_init_trace_q(struct tws_softc *sc)
{
sc->trace_q.head=0;
sc->trace_q.tail=0;
sc->trace_q.depth=256;
sc->trace_q.overflow=0;
sc->trace_q.q = malloc(sizeof(struct tws_trace_rec)*sc->trace_q.depth,
M_TWS, M_WAITOK | M_ZERO);
return(SUCCESS);
}
static int
tws_init_reqs(struct tws_softc *sc, u_int32_t dma_mem_size)
{
struct tws_command_packet *cmd_buf;
cmd_buf = (struct tws_command_packet *)sc->dma_mem;
int i;
bzero(cmd_buf, dma_mem_size);
TWS_TRACE_DEBUG(sc, "phy cmd", sc->dma_mem_phys, 0);
mtx_lock(&sc->q_lock);
for ( i=0; i< tws_queue_depth; i++)
{
if (bus_dmamap_create(sc->data_tag, 0, &sc->reqs[i].dma_map)) {
/* log a ENOMEM failure msg here */
mtx_unlock(&sc->q_lock);
return(FAILURE);
}
sc->reqs[i].cmd_pkt = &cmd_buf[i];
sc->sense_bufs[i].hdr = &cmd_buf[i].hdr ;
sc->sense_bufs[i].hdr_pkt_phy = sc->dma_mem_phys +
(i * sizeof(struct tws_command_packet));
sc->reqs[i].cmd_pkt_phy = sc->dma_mem_phys +
sizeof(struct tws_command_header) +
(i * sizeof(struct tws_command_packet));
sc->reqs[i].request_id = i;
sc->reqs[i].sc = sc;
sc->reqs[i].cmd_pkt->hdr.header_desc.size_header = 128;
callout_init(&sc->reqs[i].timeout, 1);
sc->reqs[i].state = TWS_REQ_STATE_FREE;
if ( i >= TWS_RESERVED_REQS )
tws_q_insert_tail(sc, &sc->reqs[i], TWS_FREE_Q);
}
mtx_unlock(&sc->q_lock);
return(SUCCESS);
}
static void
tws_dmamap_cmds_load_cbfn(void *arg, bus_dma_segment_t *segs,
int nseg, int error)
{
/* printf("command load done \n"); */
*((bus_addr_t *)arg) = segs[0].ds_addr;
}
void
tws_send_event(struct tws_softc *sc, u_int8_t event)
{
mtx_assert(&sc->gen_lock, MA_OWNED);
TWS_TRACE_DEBUG(sc, "received event ", 0, event);
switch (event) {
case TWS_INIT_START:
sc->tws_state = TWS_INIT;
break;
case TWS_INIT_COMPLETE:
if (sc->tws_state != TWS_INIT) {
device_printf(sc->tws_dev, "invalid state transition %d => TWS_ONLINE\n", sc->tws_state);
} else {
sc->tws_state = TWS_ONLINE;
}
break;
case TWS_RESET_START:
/* We can transition to reset state from any state except reset*/
if (sc->tws_state != TWS_RESET) {
sc->tws_prev_state = sc->tws_state;
sc->tws_state = TWS_RESET;
}
break;
case TWS_RESET_COMPLETE:
if (sc->tws_state != TWS_RESET) {
device_printf(sc->tws_dev, "invalid state transition %d => %d (previous state)\n", sc->tws_state, sc->tws_prev_state);
} else {
sc->tws_state = sc->tws_prev_state;
}
break;
case TWS_SCAN_FAILURE:
if (sc->tws_state != TWS_ONLINE) {
device_printf(sc->tws_dev, "invalid state transition %d => TWS_OFFLINE\n", sc->tws_state);
} else {
sc->tws_state = TWS_OFFLINE;
}
break;
case TWS_UNINIT_START:
if ((sc->tws_state != TWS_ONLINE) && (sc->tws_state != TWS_OFFLINE)) {
device_printf(sc->tws_dev, "invalid state transition %d => TWS_UNINIT\n", sc->tws_state);
} else {
sc->tws_state = TWS_UNINIT;
}
break;
}
}
uint8_t
tws_get_state(struct tws_softc *sc)
{
return((u_int8_t)sc->tws_state);
}
/* Called during system shutdown after sync. */
static int
tws_shutdown(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
tws_turn_off_interrupts(sc);
tws_init_connect(sc, 1);
return (0);
}
/*
* Device suspend routine.
*/
static int
tws_suspend(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
return (0);
}
/*
* Device resume routine.
*/
static int
tws_resume(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
if ( sc )
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
return (0);
}
struct tws_request *
tws_get_request(struct tws_softc *sc, u_int16_t type)
{
struct mtx *my_mutex = ((type == TWS_REQ_TYPE_SCSI_IO) ? &sc->q_lock : &sc->gen_lock);
struct tws_request *r = NULL;
mtx_lock(my_mutex);
if (type == TWS_REQ_TYPE_SCSI_IO) {
r = tws_q_remove_head(sc, TWS_FREE_Q);
} else {
if ( sc->reqs[type].state == TWS_REQ_STATE_FREE ) {
r = &sc->reqs[type];
}
}
if ( r ) {
bzero(&r->cmd_pkt->cmd, sizeof(struct tws_command_apache));
r->data = NULL;
r->length = 0;
r->type = type;
r->flags = TWS_DIR_UNKNOWN;
r->error_code = TWS_REQ_RET_INVALID;
r->cb = NULL;
r->ccb_ptr = NULL;
callout_stop(&r->timeout);
r->next = r->prev = NULL;
r->state = ((type == TWS_REQ_TYPE_SCSI_IO) ? TWS_REQ_STATE_TRAN : TWS_REQ_STATE_BUSY);
}
mtx_unlock(my_mutex);
return(r);
}
void
tws_release_request(struct tws_request *req)
{
struct tws_softc *sc = req->sc;
TWS_TRACE_DEBUG(sc, "entry", sc, 0);
mtx_lock(&sc->q_lock);
tws_q_insert_tail(sc, req, TWS_FREE_Q);
mtx_unlock(&sc->q_lock);
}
static device_method_t tws_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, tws_probe),
DEVMETHOD(device_attach, tws_attach),
DEVMETHOD(device_detach, tws_detach),
DEVMETHOD(device_shutdown, tws_shutdown),
DEVMETHOD(device_suspend, tws_suspend),
DEVMETHOD(device_resume, tws_resume),
DEVMETHOD_END
};
static driver_t tws_driver = {
"tws",
tws_methods,
sizeof(struct tws_softc)
};
static devclass_t tws_devclass;
/* DEFINE_CLASS_0(tws, tws_driver, tws_methods, sizeof(struct tws_softc)); */
DRIVER_MODULE(tws, pci, tws_driver, tws_devclass, 0, 0);
MODULE_DEPEND(tws, cam, 1, 1, 1);
MODULE_DEPEND(tws, pci, 1, 1, 1);
TUNABLE_INT("hw.tws.queue_depth", &tws_queue_depth);
TUNABLE_INT("hw.tws.enable_msi", &tws_enable_msi);
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