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freebsd-dev/sys/dev/twa/tw_osl_freebsd.c

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/*
* Copyright (c) 2004-05 Applied Micro Circuits Corporation.
* Copyright (c) 2004-05 Vinod Kashyap.
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* AMCC'S 3ware driver for 9000 series storage controllers.
*
* Author: Vinod Kashyap
*/
/*
* FreeBSD specific functions not related to CAM, and other
* miscellaneous functions.
*/
#include <dev/twa/tw_osl_includes.h>
#include <dev/twa/tw_cl_fwif.h>
#include <dev/twa/tw_cl_ioctl.h>
#include <dev/twa/tw_osl_ioctl.h>
#ifdef TW_OSL_DEBUG
TW_INT32 TW_DEBUG_LEVEL_FOR_OSL = TW_OSL_DEBUG;
TW_INT32 TW_OSL_DEBUG_LEVEL_FOR_CL = TW_OSL_DEBUG;
#endif /* TW_OSL_DEBUG */
MALLOC_DEFINE(TW_OSLI_MALLOC_CLASS, "twa commands", "twa commands");
static d_open_t twa_open;
static d_close_t twa_close;
static d_ioctl_t twa_ioctl;
static struct cdevsw twa_cdevsw = {
.d_version = D_VERSION,
.d_open = twa_open,
.d_close = twa_close,
.d_ioctl = twa_ioctl,
.d_name = "twa",
};
static devclass_t twa_devclass;
/*
* Function name: twa_open
* Description: Called when the controller is opened.
* Simply marks the controller as open.
*
* Input: dev -- control device corresponding to the ctlr
* flags -- mode of open
* fmt -- device type (character/block etc.)
* proc -- current process
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_open(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, d_thread_t *proc)
{
TW_INT32 unit = minor(dev);
struct twa_softc *sc = devclass_get_softc(twa_devclass, unit);
tw_osli_dbg_dprintf(5, sc, "entered");
sc->state |= TW_OSLI_CTLR_STATE_OPEN;
return(0);
}
/*
* Function name: twa_close
* Description: Called when the controller is closed.
* Simply marks the controller as not open.
*
* Input: dev -- control device corresponding to the ctlr
* flags -- mode of corresponding open
* fmt -- device type (character/block etc.)
* proc -- current process
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_close(struct cdev *dev, TW_INT32 flags, TW_INT32 fmt, d_thread_t *proc)
{
TW_INT32 unit = minor(dev);
struct twa_softc *sc = devclass_get_softc(twa_devclass, unit);
tw_osli_dbg_dprintf(5, sc, "entered");
sc->state &= ~TW_OSLI_CTLR_STATE_OPEN;
return(0);
}
/*
* Function name: twa_ioctl
* Description: Called when an ioctl is posted to the controller.
* Handles any OS Layer specific cmds, passes the rest
* on to the Common Layer.
*
* Input: dev -- control device corresponding to the ctlr
* cmd -- ioctl cmd
* buf -- ptr to buffer in kernel memory, which is
* a copy of the input buffer in user-space
* flags -- mode of corresponding open
* proc -- current process
* Output: buf -- ptr to buffer in kernel memory, which will
* be copied to the output buffer in user-space
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_ioctl(struct cdev *dev, u_long cmd, caddr_t buf, TW_INT32 flags, d_thread_t *proc)
{
struct twa_softc *sc = (struct twa_softc *)(dev->si_drv1);
TW_INT32 error;
tw_osli_dbg_dprintf(5, sc, "entered");
switch (cmd) {
case TW_OSL_IOCTL_FIRMWARE_PASS_THROUGH:
tw_osli_dbg_dprintf(6, sc, "ioctl: fw_passthru");
error = tw_osli_fw_passthru(sc, (TW_INT8 *)buf);
break;
case TW_OSL_IOCTL_SCAN_BUS:
/* Request CAM for a bus scan. */
tw_osli_dbg_dprintf(6, sc, "ioctl: scan bus");
error = tw_osli_request_bus_scan(sc);
break;
default:
tw_osli_dbg_dprintf(6, sc, "ioctl: 0x%lx", cmd);
error = tw_cl_ioctl(&sc->ctlr_handle, cmd, buf);
break;
}
return(error);
}
static TW_INT32 twa_probe(device_t dev);
static TW_INT32 twa_attach(device_t dev);
static TW_INT32 twa_detach(device_t dev);
static TW_INT32 twa_shutdown(device_t dev);
static TW_VOID twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op);
static TW_VOID twa_pci_intr(TW_VOID *arg);
static TW_VOID twa_deferred_intr(TW_VOID *context, TW_INT32 pending);
static TW_INT32 tw_osli_alloc_mem(struct twa_softc *sc);
static TW_VOID tw_osli_free_resources(struct twa_softc *sc);
static TW_VOID twa_map_load_data_callback(TW_VOID *arg,
bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
static TW_VOID twa_map_load_callback(TW_VOID *arg,
bus_dma_segment_t *segs, TW_INT32 nsegments, TW_INT32 error);
static device_method_t twa_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, twa_probe),
DEVMETHOD(device_attach, twa_attach),
DEVMETHOD(device_detach, twa_detach),
DEVMETHOD(device_shutdown, twa_shutdown),
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
{0, 0}
};
static driver_t twa_pci_driver = {
"twa",
twa_methods,
sizeof(struct twa_softc)
};
DRIVER_MODULE(twa, pci, twa_pci_driver, twa_devclass, 0, 0);
/*
* Function name: twa_probe
* Description: Called at driver load time. Claims 9000 ctlrs.
*
* Input: dev -- bus device corresponding to the ctlr
* Output: None
* Return value: <= 0 -- success
* > 0 -- failure
*/
static TW_INT32
twa_probe(device_t dev)
{
static TW_UINT8 first_ctlr = 1;
tw_osli_dbg_printf(3, "entered");
if (tw_cl_ctlr_supported(pci_get_vendor(dev), pci_get_device(dev))) {
device_set_desc(dev, TW_OSLI_DEVICE_NAME);
/* Print the driver version only once. */
if (first_ctlr) {
printf("3ware device driver for 9000 series storage "
"controllers, version: %s\n",
TW_OSL_DRIVER_VERSION_STRING);
first_ctlr = 0;
}
return(0);
}
return(ENXIO);
}
/*
* Function name: twa_attach
* Description: Allocates pci resources; updates sc; adds a node to the
* sysctl tree to expose the driver version; makes calls
* (to the Common Layer) to initialize ctlr, and to
* attach to CAM.
*
* Input: dev -- bus device corresponding to the ctlr
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_attach(device_t dev)
{
struct twa_softc *sc = device_get_softc(dev);
TW_UINT32 command;
TW_INT32 error;
tw_osli_dbg_dprintf(3, sc, "entered");
sc->ctlr_handle.osl_ctlr_ctxt = sc;
/* Initialize the softc structure. */
sc->bus_dev = dev;
/* Initialize the mutexes right here. */
sc->io_lock = &(sc->io_lock_handle);
mtx_init(sc->io_lock, "tw_osl_io_lock", NULL, MTX_SPIN);
sc->q_lock = &(sc->q_lock_handle);
mtx_init(sc->q_lock, "tw_osl_q_lock", NULL, MTX_SPIN);
sysctl_ctx_init(&sc->sysctl_ctxt);
sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
device_get_nameunit(dev), CTLFLAG_RD, 0, "");
if (sc->sysctl_tree == NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2000,
"Cannot add sysctl tree node",
ENXIO);
return(ENXIO);
}
SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
OID_AUTO, "driver_version", CTLFLAG_RD,
TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");
/* Make sure we are going to be able to talk to this board. */
command = pci_read_config(dev, PCIR_COMMAND, 2);
if ((command & PCIM_CMD_PORTEN) == 0) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2001,
"Register window not available",
ENXIO);
tw_osli_free_resources(sc);
return(ENXIO);
}
/* Force the busmaster enable bit on, in case the BIOS forgot. */
command |= PCIM_CMD_BUSMASTEREN;
pci_write_config(dev, PCIR_COMMAND, command, 2);
/* Allocate the PCI register window. */
sc->reg_res_id = PCIR_BARS;
if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
== NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2002,
"Can't allocate register window",
ENXIO);
tw_osli_free_resources(sc);
return(ENXIO);
}
sc->bus_tag = rman_get_bustag(sc->reg_res);
sc->bus_handle = rman_get_bushandle(sc->reg_res);
/* Allocate and register our interrupt. */
sc->irq_res_id = 0;
if ((sc->irq_res = bus_alloc_resource(sc->bus_dev, SYS_RES_IRQ,
&(sc->irq_res_id), 0, ~0, 1,
RF_SHAREABLE | RF_ACTIVE)) == NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2003,
"Can't allocate interrupt",
ENXIO);
tw_osli_free_resources(sc);
return(ENXIO);
}
if ((error = bus_setup_intr(sc->bus_dev, sc->irq_res,
((mp_ncpus > 1) ? (INTR_MPSAFE | INTR_FAST) : 0) |
INTR_TYPE_CAM,
twa_pci_intr, sc, &sc->intr_handle))) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2004,
"Can't set up interrupt",
error);
tw_osli_free_resources(sc);
return(error);
}
TASK_INIT(&sc->deferred_intr_callback, 0, twa_deferred_intr, sc);
if ((error = tw_osli_alloc_mem(sc))) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2005,
"Memory allocation failure",
error);
tw_osli_free_resources(sc);
return(error);
}
/* Initialize the Common Layer for this controller. */
if ((error = tw_cl_init_ctlr(&sc->ctlr_handle, sc->flags,
TW_OSLI_MAX_NUM_IOS, TW_OSLI_MAX_NUM_AENS,
sc->non_dma_mem, sc->dma_mem,
sc->dma_mem_phys
#ifdef TW_OSL_FLASH_FIRMWARE
, sc->flash_dma_mem, sc->flash_dma_mem_phys
#endif /* TW_OSL_FLASH_FIRMWARE */
))) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2006,
"Failed to initialize Common Layer/controller",
error);
tw_osli_free_resources(sc);
return(error);
}
#ifdef TW_OSL_FLASH_FIRMWARE
/* Free any memory allocated for firmware flashing. */
if (sc->flash_dma_mem) {
bus_dmamap_unload(sc->flash_tag, sc->flash_map);
bus_dmamem_free(sc->flash_tag, sc->flash_dma_mem,
sc->flash_map);
}
if (sc->flash_tag)
bus_dma_tag_destroy(sc->flash_tag);
/*
* Set flash_tag and flash_dma_mem to 0, so we don't try freeing them
* again, later.
*/
sc->flash_tag = 0;
sc->flash_dma_mem = 0;
#endif /* TW_OSL_FLASH_FIRMWARE */
/* Create the control device. */
sc->ctrl_dev = make_dev(&twa_cdevsw, device_get_unit(sc->bus_dev),
UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR,
"twa%d", device_get_unit(sc->bus_dev));
sc->ctrl_dev->si_drv1 = sc;
if ((error = tw_osli_cam_attach(sc))) {
tw_osli_free_resources(sc);
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2007,
"Failed to initialize CAM",
error);
return(error);
}
return(0);
}
/*
* Function name: tw_osli_alloc_mem
* Description: Allocates memory needed both by CL and OSL.
*
* Input: sc -- OSL internal controller context
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
tw_osli_alloc_mem(struct twa_softc *sc)
{
struct tw_osli_req_context *req;
TW_UINT32 max_sg_elements;
TW_UINT32 non_dma_mem_size;
TW_UINT32 dma_mem_size;
#ifdef TW_OSL_FLASH_FIRMWARE
TW_UINT32 flash_dma_mem_size;
#endif /* TW_OSL_FLASH_FIRMWARE */
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
TW_UINT32 per_req_dma_mem_size;
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
TW_INT32 error;
TW_INT32 i;
tw_osli_dbg_dprintf(3, sc, "entered");
sc->flags |= (sizeof(bus_addr_t) == 8) ? TW_CL_64BIT_ADDRESSES : 0;
sc->flags |= (sizeof(bus_size_t) == 8) ? TW_CL_64BIT_SG_LENGTH : 0;
#ifdef TW_OSL_FLASH_FIRMWARE
sc->flags |= TW_CL_FLASH_FIRMWARE;
#endif /* TW_OSL_FLASH_FIRMWARE */
max_sg_elements = (sizeof(bus_addr_t) == 8) ?
TW_CL_MAX_64BIT_SG_ELEMENTS : TW_CL_MAX_32BIT_SG_ELEMENTS;
if ((error = tw_cl_get_mem_requirements(&sc->ctlr_handle, sc->flags,
TW_OSLI_MAX_NUM_IOS, TW_OSLI_MAX_NUM_AENS,
&(sc->alignment), &(sc->sg_size_factor),
&non_dma_mem_size, &dma_mem_size
#ifdef TW_OSL_FLASH_FIRMWARE
, &flash_dma_mem_size
#endif /* TW_OSL_FLASH_FIRMWARE */
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
, &per_req_dma_mem_size
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
))) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2008,
"Can't get Common Layer's memory requirements",
error);
return(error);
}
if ((sc->non_dma_mem = malloc(non_dma_mem_size, TW_OSLI_MALLOC_CLASS,
M_WAITOK)) == NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2009,
"Can't allocate non-dma memory",
ENOMEM);
return(ENOMEM);
}
/* Create the parent dma tag. */
if (bus_dma_tag_create(NULL, /* parent */
sc->alignment, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
TW_CL_MAX_IO_SIZE, /* maxsize */
max_sg_elements, /* nsegments */
TW_CL_MAX_IO_SIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&sc->parent_tag /* tag */)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200A,
"Can't allocate parent DMA tag",
ENOMEM);
return(ENOMEM);
}
/* Create a dma tag for Common Layer's DMA'able memory (dma_mem). */
if (bus_dma_tag_create(sc->parent_tag, /* parent */
sc->alignment, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
(TW_OSLI_MAX_NUM_IOS *
per_req_dma_mem_size) +
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
dma_mem_size, /* maxsize */
1, /* nsegments */
BUS_SPACE_MAXSIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&sc->cmd_tag /* tag */)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200B,
"Can't allocate DMA tag for Common Layer's "
"DMA'able memory",
ENOMEM);
return(ENOMEM);
}
if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
BUS_DMA_NOWAIT, &sc->cmd_map)) {
/* Try a second time. */
if (bus_dmamem_alloc(sc->cmd_tag, &sc->dma_mem,
BUS_DMA_NOWAIT, &sc->cmd_map)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200C,
"Can't allocate DMA'able memory for the"
"Common Layer",
ENOMEM);
return(ENOMEM);
}
}
bus_dmamap_load(sc->cmd_tag, sc->cmd_map, sc->dma_mem,
dma_mem_size, twa_map_load_callback,
&sc->dma_mem_phys, 0);
#ifdef TW_OSL_FLASH_FIRMWARE
/*
* Create a dma tag for Common Layer's DMA'able memory,
* used to flash firmware (flash_dma_mem).
*/
if (bus_dma_tag_create(sc->parent_tag, /* parent */
sc->alignment, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
flash_dma_mem_size, /* maxsize */
1, /* nsegments */
flash_dma_mem_size, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&sc->flash_tag /* tag */)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200D,
"Can't allocate DMA tag for Common Layer's "
"firmware flash memory",
ENOMEM);
return(ENOMEM);
}
if (bus_dmamem_alloc(sc->flash_tag, &sc->flash_dma_mem,
BUS_DMA_NOWAIT, &sc->flash_map)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200E,
"Can't allocate DMA'able memory for Common Layer's "
"firmware flash",
ENOMEM);
return(ENOMEM);
}
bus_dmamap_load(sc->flash_tag, sc->flash_map, sc->flash_dma_mem,
flash_dma_mem_size, twa_map_load_callback,
&sc->flash_dma_mem_phys, 0);
#endif /* TW_OSL_FLASH_FIRMWARE */
/*
* 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 */
sc->alignment, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
TW_CL_MAX_IO_SIZE, /* maxsize */
max_sg_elements, /* nsegments */
TW_CL_MAX_IO_SIZE, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
twa_busdma_lock, /* lockfunc */
sc->io_lock, /* lockfuncarg */
&sc->dma_tag /* tag */)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x200F,
"Can't allocate DMA tag for data buffers",
ENOMEM);
return(ENOMEM);
}
/*
* Create a dma tag for ioctl data buffers; size will be the maximum
* possible I/O size (128kB).
*/
if (bus_dma_tag_create(sc->parent_tag, /* parent */
sc->alignment, /* alignment */
0, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
TW_CL_MAX_IO_SIZE, /* maxsize */
max_sg_elements, /* nsegments */
TW_CL_MAX_IO_SIZE, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
twa_busdma_lock, /* lockfunc */
sc->io_lock, /* lockfuncarg */
&sc->ioctl_tag /* tag */)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2010,
"Can't allocate DMA tag for ioctl data buffers",
ENOMEM);
return(ENOMEM);
}
/* Create just one map for all ioctl request data buffers. */
if (bus_dmamap_create(sc->ioctl_tag, 0, &sc->ioctl_map)) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2011,
"Can't create ioctl map",
ENOMEM);
return(ENOMEM);
}
/* Initialize request queues. */
tw_osli_req_q_init(sc, TW_OSLI_FREE_Q);
tw_osli_req_q_init(sc, TW_OSLI_BUSY_Q);
if ((sc->req_ctxt_buf = (struct tw_osli_req_context *)
malloc((sizeof(struct tw_osli_req_context) *
TW_OSLI_MAX_NUM_IOS),
TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2012,
"Failed to allocate request packets",
ENOMEM);
return(ENOMEM);
}
bzero(sc->req_ctxt_buf,
sizeof(struct tw_osli_req_context) * TW_OSLI_MAX_NUM_IOS);
for (i = 0; i < TW_OSLI_MAX_NUM_IOS; i++) {
req = &(sc->req_ctxt_buf[i]);
req->ctlr = sc;
if (bus_dmamap_create(sc->dma_tag, 0, &req->dma_map)) {
tw_osli_printf(sc, "request # = %d, error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2013,
"Can't create dma map",
i, ENOMEM);
return(ENOMEM);
}
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->req_pkt.dma_mem = ((TW_INT8 *)(sc->dma_mem)) +
(i * per_req_dma_mem_size);
req->req_pkt.dma_mem_phys = sc->dma_mem_phys +
(i * per_req_dma_mem_size);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
/* Insert request into the free queue. */
tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
}
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
sc->dma_mem = ((TW_INT8 *)(sc->dma_mem)) +
(TW_OSLI_MAX_NUM_IOS * per_req_dma_mem_size);
sc->dma_mem_phys += (TW_OSLI_MAX_NUM_IOS * per_req_dma_mem_size);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
return(0);
}
/*
* Function name: tw_osli_free_resources
* Description: Performs clean-up at the time of going down.
*
* Input: sc -- ptr to OSL internal ctlr context
* Output: None
* Return value: None
*/
static TW_VOID
tw_osli_free_resources(struct twa_softc *sc)
{
struct tw_osli_req_context *req;
TW_INT32 error = 0;
tw_osli_dbg_dprintf(3, sc, "entered");
/* Detach from CAM */
tw_osli_cam_detach(sc);
if (sc->req_ctxt_buf)
while ((req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q)) !=
NULL)
if ((error = bus_dmamap_destroy(sc->dma_tag,
req->dma_map)))
tw_osli_dbg_dprintf(1, sc,
"dmamap_destroy(dma) returned %d",
error);
if ((error = bus_dmamap_destroy(sc->ioctl_tag, sc->ioctl_map)))
tw_osli_dbg_dprintf(1, sc,
"dmamap_destroy(ioctl) returned %d", error);
/* Free all memory allocated so far. */
if (sc->req_ctxt_buf)
free(sc->req_ctxt_buf, TW_OSLI_MALLOC_CLASS);
if (sc->non_dma_mem)
free(sc->non_dma_mem, TW_OSLI_MALLOC_CLASS);
if (sc->dma_mem) {
bus_dmamap_unload(sc->cmd_tag, sc->cmd_map);
bus_dmamem_free(sc->cmd_tag, sc->dma_mem,
sc->cmd_map);
}
if (sc->cmd_tag)
if ((error = bus_dma_tag_destroy(sc->cmd_tag)))
tw_osli_dbg_dprintf(1, sc,
"dma_tag_destroy(cmd) returned %d", error);
#ifdef TW_OSL_FLASH_FIRMWARE
if (sc->flash_dma_mem) {
/* In case this piece of memory has already been freed. */
bus_dmamap_unload(sc->flash_tag, sc->flash_map);
bus_dmamem_free(sc->flash_tag, sc->flash_dma_mem,
sc->flash_map);
}
if (sc->flash_tag)
if ((error = bus_dma_tag_destroy(sc->flash_tag)))
tw_osli_dbg_dprintf(1, sc,
"dma_tag_destroy(flash) returned %d", error);
#endif /* TW_OSL_FLASH_FIRMWARE */
if (sc->dma_tag)
if ((error = bus_dma_tag_destroy(sc->dma_tag)))
tw_osli_dbg_dprintf(1, sc,
"dma_tag_destroy(dma) returned %d", error);
if (sc->ioctl_tag)
if ((error = bus_dma_tag_destroy(sc->ioctl_tag)))
tw_osli_dbg_dprintf(1, sc,
"dma_tag_destroy(ioctl) returned %d", error);
if (sc->parent_tag)
if ((error = bus_dma_tag_destroy(sc->parent_tag)))
tw_osli_dbg_dprintf(1, sc,
"dma_tag_destroy(parent) returned %d", error);
/* Disconnect the interrupt handler. */
if (sc->intr_handle)
if ((error = bus_teardown_intr(sc->bus_dev,
sc->irq_res, sc->intr_handle)))
tw_osli_dbg_dprintf(1, sc,
"teardown_intr returned %d", error);
if (sc->irq_res != NULL)
if ((error = bus_release_resource(sc->bus_dev,
SYS_RES_IRQ, sc->irq_res_id, sc->irq_res)))
tw_osli_dbg_dprintf(1, sc,
"release_resource(irq) returned %d", error);
/* Release the register window mapping. */
if (sc->reg_res != NULL)
if ((error = bus_release_resource(sc->bus_dev,
SYS_RES_IOPORT, sc->reg_res_id, sc->reg_res)))
tw_osli_dbg_dprintf(1, sc,
"release_resource(io) returned %d", error);
/* Destroy the control device. */
if (sc->ctrl_dev != (struct cdev *)NULL)
destroy_dev(sc->ctrl_dev);
if ((error = sysctl_ctx_free(&sc->sysctl_ctxt)))
tw_osli_dbg_dprintf(1, sc,
"sysctl_ctx_free returned %d", error);
}
/*
* Function name: twa_detach
* Description: Called when the controller is being detached from
* the pci bus.
*
* Input: dev -- bus device corresponding to the ctlr
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_detach(device_t dev)
{
struct twa_softc *sc = device_get_softc(dev);
TW_INT32 error;
tw_osli_dbg_dprintf(3, sc, "entered");
error = EBUSY;
if (sc->state & TW_OSLI_CTLR_STATE_OPEN) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2014,
"Device open",
error);
goto out;
}
/* Shut the controller down. */
if ((error = twa_shutdown(dev)))
goto out;
/* Free all resources associated with this controller. */
tw_osli_free_resources(sc);
error = 0;
out:
return(error);
}
/*
* Function name: twa_shutdown
* Description: Called at unload/shutdown time. Lets the controller
* know that we are going down.
*
* Input: dev -- bus device corresponding to the ctlr
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
static TW_INT32
twa_shutdown(device_t dev)
{
struct twa_softc *sc = device_get_softc(dev);
TW_INT32 error = 0;
tw_osli_dbg_dprintf(3, sc, "entered");
/* Disconnect from the controller. */
if ((error = tw_cl_shutdown_ctlr(&(sc->ctlr_handle), 0))) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2015,
"Failed to shutdown Common Layer/controller",
error);
}
return(error);
}
/*
* Function name: twa_busdma_lock
* Description: Function to provide synchronization during busdma_swi.
*
* Input: lock_arg -- lock mutex sent as argument
* op -- operation (lock/unlock) expected of the function
* Output: None
* Return value: None
*/
TW_VOID
twa_busdma_lock(TW_VOID *lock_arg, bus_dma_lock_op_t op)
{
struct mtx *lock;
lock = (struct mtx *)lock_arg;
switch (op) {
case BUS_DMA_LOCK:
mtx_lock_spin(lock);
break;
case BUS_DMA_UNLOCK:
mtx_unlock_spin(lock);
break;
default:
panic("Unknown operation 0x%x for twa_busdma_lock!", op);
}
}
/*
* Function name: twa_pci_intr
* Description: Interrupt handler. Wrapper for twa_interrupt.
*
* Input: arg -- ptr to OSL internal ctlr context
* Output: None
* Return value: None
*/
static TW_VOID
twa_pci_intr(TW_VOID *arg)
{
struct twa_softc *sc = (struct twa_softc *)arg;
tw_osli_dbg_dprintf(10, sc, "entered");
if (tw_cl_interrupt(&(sc->ctlr_handle)))
taskqueue_enqueue_fast(taskqueue_fast,
&(sc->deferred_intr_callback));
}
/*
* Function name: twa_deferred_intr
* Description: Deferred interrupt handler.
*
* Input: context -- ptr to OSL internal ctlr context
* pending -- not used
* Output: None
* Return value: None
*/
static TW_VOID
twa_deferred_intr(TW_VOID *context, TW_INT32 pending)
{
struct twa_softc *sc = (struct twa_softc *)context;
tw_osli_dbg_dprintf(10, sc, "entered");
tw_cl_deferred_interrupt(&(sc->ctlr_handle));
}
/*
* Function name: tw_osli_fw_passthru
* Description: Builds a fw passthru cmd pkt, and submits it to CL.
*
* Input: sc -- ptr to OSL internal ctlr context
* buf -- ptr to ioctl pkt understood by CL
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_osli_fw_passthru(struct twa_softc *sc, TW_INT8 *buf)
{
struct tw_osli_req_context *req;
struct tw_osli_ioctl_no_data_buf *user_buf =
(struct tw_osli_ioctl_no_data_buf *)buf;
TW_TIME end_time;
TW_UINT32 timeout = 60;
TW_UINT32 data_buf_size_adjusted;
struct tw_cl_req_packet *req_pkt;
struct tw_cl_passthru_req_packet *pt_req;
TW_INT32 error;
tw_osli_dbg_dprintf(5, sc, "ioctl: passthru");
if ((req = tw_osli_get_request(sc)) == NULL)
return(EBUSY);
req->req_handle.osl_req_ctxt = req;
req->orig_req = buf;
req->flags |= TW_OSLI_REQ_FLAGS_PASSTHRU;
req_pkt = &(req->req_pkt);
req_pkt->status = 0;
req_pkt->tw_osl_callback = tw_osl_complete_passthru;
/* Let the Common Layer retry the request on cmd queue full. */
req_pkt->flags |= TW_CL_REQ_RETRY_ON_BUSY;
pt_req = &(req_pkt->gen_req_pkt.pt_req);
/*
* Make sure that the data buffer sent to firmware is a
* 512 byte multiple in size.
*/
data_buf_size_adjusted =
(user_buf->driver_pkt.buffer_length +
(sc->sg_size_factor - 1)) & ~(sc->sg_size_factor - 1);
if ((req->length = data_buf_size_adjusted)) {
if ((req->data = malloc(data_buf_size_adjusted,
TW_OSLI_MALLOC_CLASS, M_WAITOK)) == NULL) {
error = ENOMEM;
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2016,
"Could not alloc mem for "
"fw_passthru data_buf",
error);
goto fw_passthru_err;
}
/* Copy the payload. */
if ((error = copyin((TW_VOID *)(user_buf->pdata),
req->data,
user_buf->driver_pkt.buffer_length)) != 0) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2017,
"Could not copyin fw_passthru data_buf",
error);
goto fw_passthru_err;
}
pt_req->sgl_entries = 1; /* will be updated during mapping */
req->flags |= (TW_OSLI_REQ_FLAGS_DATA_IN |
TW_OSLI_REQ_FLAGS_DATA_OUT);
} else
pt_req->sgl_entries = 0; /* no payload */
pt_req->cmd_pkt = (TW_VOID *)(&(user_buf->cmd_pkt));
pt_req->cmd_pkt_length = sizeof(struct tw_cl_command_packet);
if ((error = tw_osli_map_request(req)))
goto fw_passthru_err;
end_time = tw_osl_get_local_time() + timeout;
while (req->state != TW_OSLI_REQ_STATE_COMPLETE) {
req->flags |= TW_OSLI_REQ_FLAGS_SLEEPING;
error = tsleep(req, PRIBIO, "twa_passthru", timeout * hz);
if (!(req->flags & TW_OSLI_REQ_FLAGS_SLEEPING))
error = 0;
req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
if (! error) {
if (((error = req->error_code)) ||
((error = (req->state !=
TW_OSLI_REQ_STATE_COMPLETE))) ||
((error = req_pkt->status)))
goto fw_passthru_err;
break;
}
if (req_pkt->status) {
error = req_pkt->status;
goto fw_passthru_err;
}
if (error == EWOULDBLOCK) {
/* Time out! */
tw_osli_printf(sc, "request = %p",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2018,
"Passthru request timed out!",
req);
/*
* Should I check here if the timeout happened
* because of yet another reset, and not do a
* second reset?
*/
tw_cl_reset_ctlr(&sc->ctlr_handle);
/*
* Don't touch req after a reset. It (and any
* associated data) will already have been
* freed by the callback. Just return.
*/
user_buf->driver_pkt.os_status = error;
return(ETIMEDOUT);
}
/*
* Either the request got completed, or we were woken up by a
* signal. Calculate the new timeout, in case it was the latter.
*/
timeout = (end_time - tw_osl_get_local_time());
}
/* If there was a payload, copy it back. */
if ((!error) && (req->length))
if ((error = copyout(req->data, user_buf->pdata,
user_buf->driver_pkt.buffer_length)))
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x2019,
"Could not copyout fw_passthru data_buf",
error);
fw_passthru_err:
/*
* Print the failure message. For some reason, on certain OS versions,
* printing this error message during reset hangs the display (although
* the rest of the system is running fine. So, don't print it if the
* failure was due to a reset.
*/
if ((error) && (error != TW_CL_ERR_REQ_BUS_RESET))
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x201A,
"Firmware passthru failed!",
error);
user_buf->driver_pkt.os_status = error;
/* Free resources. */
if (req->data)
free(req->data, TW_OSLI_MALLOC_CLASS);
tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
return(error);
}
/*
* Function name: tw_osl_complete_passthru
* Description: Called to complete passthru requests.
*
* Input: req_handle -- ptr to request handle
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_complete_passthru(struct tw_cl_req_handle *req_handle)
{
struct tw_osli_req_context *req = req_handle->osl_req_ctxt;
struct twa_softc *sc = req->ctlr;
tw_osli_dbg_dprintf(5, sc, "entered");
if (req->state != TW_OSLI_REQ_STATE_BUSY) {
tw_osli_printf(sc, "request = %p, status = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x201B,
"Unposted command completed!!",
req, req->state);
}
/*
* Remove request from the busy queue. Just mark it complete.
* There's no need to move it into the complete queue as we are
* going to be done with it right now.
*/
req->state = TW_OSLI_REQ_STATE_COMPLETE;
tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
tw_osli_unmap_request(req);
/*
* Don't do a wake up if there was an error even before the request
* was sent down to the Common Layer, and we hadn't gotten an
* EINPROGRESS. The request originator will then be returned an
* error, and he can do the clean-up.
*/
if ((req->error_code) &&
(!(req->state & TW_OSLI_REQ_FLAGS_IN_PROGRESS)))
return;
if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
if (req->flags & TW_OSLI_REQ_FLAGS_SLEEPING) {
/* Wake up the sleeping command originator. */
tw_osli_dbg_dprintf(5, sc,
"Waking up originator of request %p", req);
req->flags &= ~TW_OSLI_REQ_FLAGS_SLEEPING;
wakeup_one(req);
} else {
/*
* If the request completed even before tsleep
* was called, simply return.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_MAPPED)
return;
tw_osli_printf(sc, "request = %p",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x201C,
"Passthru callback called, "
"and caller not sleeping",
req);
}
} else {
tw_osli_printf(sc, "request = %p",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x201D,
"Passthru callback called for non-passthru request",
req);
}
}
/*
* Function name: tw_osli_get_request
* Description: Gets a request pkt from the free queue.
*
* Input: sc -- ptr to OSL internal ctlr context
* Output: None
* Return value: ptr to request pkt -- success
* NULL -- failure
*/
struct tw_osli_req_context *
tw_osli_get_request(struct twa_softc *sc)
{
struct tw_osli_req_context *req;
tw_osli_dbg_dprintf(4, sc, "entered");
/* Get a free request packet. */
req = tw_osli_req_q_remove_head(sc, TW_OSLI_FREE_Q);
/* Initialize some fields to their defaults. */
if (req) {
req->req_handle.osl_req_ctxt = NULL;
req->req_handle.cl_req_ctxt = NULL;
req->data = NULL;
req->length = 0;
req->real_data = NULL;
req->real_length = 0;
req->state = TW_OSLI_REQ_STATE_INIT;/* req being initialized */
req->flags = 0;
req->error_code = 0;
req->orig_req = NULL;
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
/* Don't zero dma_mem & dma_mem_phys in req_pkt. */
req->req_pkt.cmd = 0;
req->req_pkt.flags = 0;
req->req_pkt.status = 0;
req->req_pkt.tw_osl_callback = NULL;
bzero(&(req->req_pkt.gen_req_pkt),
sizeof(req->req_pkt.gen_req_pkt));
#else /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
bzero(&(req->req_pkt), sizeof(struct tw_cl_req_packet));
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
}
return(req);
}
/*
* Function name: twa_map_load_data_callback
* Description: Callback of bus_dmamap_load for the buffer associated
* with data. Updates the cmd pkt (size/sgl_entries
* fields, as applicable) to reflect the number of sg
* elements.
*
* Input: arg -- ptr to OSL internal request context
* segs -- ptr to a list of segment descriptors
* nsegments--# of segments
* error -- 0 if no errors encountered before callback,
* non-zero if errors were encountered
* Output: None
* Return value: None
*/
static TW_VOID
twa_map_load_data_callback(TW_VOID *arg, bus_dma_segment_t *segs,
TW_INT32 nsegments, TW_INT32 error)
{
struct tw_osli_req_context *req =
(struct tw_osli_req_context *)arg;
struct twa_softc *sc = req->ctlr;
struct tw_cl_req_packet *req_pkt = &(req->req_pkt);
tw_osli_dbg_dprintf(10, sc, "entered");
/* Mark the request as currently being processed. */
req->state = TW_OSLI_REQ_STATE_BUSY;
/* Move the request into the busy queue. */
tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
req->flags |= TW_OSLI_REQ_FLAGS_MAPPED;
if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
tw_osli_allow_new_requests(sc, (TW_VOID *)(req->orig_req));
if (error == EFBIG) {
req->error_code = error;
goto out;
}
if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
struct tw_cl_passthru_req_packet *pt_req;
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
BUS_DMASYNC_PREREAD);
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
/*
* If we're using an alignment buffer, and we're
* writing data, copy the real data out.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
bcopy(req->real_data, req->data, req->real_length);
bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
BUS_DMASYNC_PREWRITE);
}
pt_req = &(req_pkt->gen_req_pkt.pt_req);
pt_req->sg_list = (TW_UINT8 *)segs;
pt_req->sgl_entries += (nsegments - 1);
error = tw_cl_fw_passthru(&(sc->ctlr_handle), req_pkt,
&(req->req_handle));
} else {
struct tw_cl_scsi_req_packet *scsi_req;
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN)
bus_dmamap_sync(sc->dma_tag, req->dma_map,
BUS_DMASYNC_PREREAD);
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT) {
/*
* If we're using an alignment buffer, and we're
* writing data, copy the real data out.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
bcopy(req->real_data, req->data, req->real_length);
bus_dmamap_sync(sc->dma_tag, req->dma_map,
BUS_DMASYNC_PREWRITE);
}
scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
scsi_req->sg_list = (TW_UINT8 *)segs;
scsi_req->sgl_entries += (nsegments - 1);
error = tw_cl_start_io(&(sc->ctlr_handle), req_pkt,
&(req->req_handle));
}
out:
if (error) {
req->error_code = error;
req_pkt->tw_osl_callback(&(req->req_handle));
/*
* If the caller had been returned EINPROGRESS, and he has
* registered a callback for handling completion, the callback
* will never get called because we were unable to submit the
* request. So, free up the request right here.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_IN_PROGRESS)
tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
}
}
/*
* Function name: twa_map_load_callback
* Description: Callback of bus_dmamap_load for the buffer associated
* with a cmd pkt.
*
* Input: arg -- ptr to variable to hold phys addr
* segs -- ptr to a list of segment descriptors
* nsegments--# of segments
* error -- 0 if no errors encountered before callback,
* non-zero if errors were encountered
* Output: None
* Return value: None
*/
static TW_VOID
twa_map_load_callback(TW_VOID *arg, bus_dma_segment_t *segs,
TW_INT32 nsegments, TW_INT32 error)
{
*((bus_addr_t *)arg) = segs[0].ds_addr;
}
/*
* Function name: tw_osli_map_request
* Description: Maps a cmd pkt and data associated with it, into
* DMA'able memory.
*
* Input: req -- ptr to request pkt
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_osli_map_request(struct tw_osli_req_context *req)
{
struct twa_softc *sc = req->ctlr;
TW_INT32 error = 0;
tw_osli_dbg_dprintf(10, sc, "entered");
/* If the command involves data, map that too. */
if (req->data != NULL) {
/*
* It's sufficient for the data pointer to be 4-byte aligned
* to work with 9000. However, if 4-byte aligned addresses
* are passed to bus_dmamap_load, we can get back sg elements
* that are not 512-byte multiples in size. So, we will let
* only those buffers that are 512-byte aligned to pass
* through, and bounce the rest, so as to make sure that we
* always get back sg elements that are 512-byte multiples
* in size.
*/
if (((vm_offset_t)req->data % sc->sg_size_factor) ||
(req->length % sc->sg_size_factor)) {
req->flags |= TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED;
/* Save original data pointer and length. */
req->real_data = req->data;
req->real_length = req->length;
req->length = (req->length +
(sc->sg_size_factor - 1)) &
~(sc->sg_size_factor - 1);
req->data = malloc(req->length, TW_OSLI_MALLOC_CLASS,
M_NOWAIT);
if (req->data == NULL) {
tw_osli_printf(sc, "error = %d",
TW_CL_SEVERITY_ERROR_STRING,
TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
0x201E,
"Failed to allocate memory "
"for bounce buffer",
ENOMEM);
/* Restore original data pointer and length. */
req->data = req->real_data;
req->length = req->real_length;
return(ENOMEM);
}
}
/*
* Map the data buffer into bus space and build the SG list.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
/* Lock against multiple simultaneous ioctl calls. */
mtx_lock_spin(sc->io_lock);
error = bus_dmamap_load(sc->ioctl_tag, sc->ioctl_map,
req->data, req->length,
twa_map_load_data_callback, req,
BUS_DMA_WAITOK);
mtx_unlock_spin(sc->io_lock);
} else {
/*
* There's only one CAM I/O thread running at a time.
* So, there's no need to hold the io_lock.
*/
error = bus_dmamap_load(sc->dma_tag, req->dma_map,
req->data, req->length,
twa_map_load_data_callback, req,
BUS_DMA_WAITOK);
}
if (!error)
error = req->error_code;
else {
if (error == EINPROGRESS) {
/*
* Specifying sc->io_lock as the lockfuncarg
* in ...tag_create should protect the access
* of ...FLAGS_MAPPED from the callback.
*/
mtx_lock_spin(sc->io_lock);
if (!(req->flags & TW_OSLI_REQ_FLAGS_MAPPED)) {
req->flags |=
TW_OSLI_REQ_FLAGS_IN_PROGRESS;
tw_osli_disallow_new_requests(sc);
}
mtx_unlock_spin(sc->io_lock);
error = 0;
} else {
/* Free alignment buffer if it was used. */
if (req->flags &
TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
free(req->data, TW_OSLI_MALLOC_CLASS);
/*
* Restore original data pointer
* and length.
*/
req->data = req->real_data;
req->length = req->real_length;
}
}
}
} else {
/* Mark the request as currently being processed. */
req->state = TW_OSLI_REQ_STATE_BUSY;
/* Move the request into the busy queue. */
tw_osli_req_q_insert_tail(req, TW_OSLI_BUSY_Q);
if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU)
error = tw_cl_fw_passthru(&sc->ctlr_handle,
&(req->req_pkt), &(req->req_handle));
else
error = tw_cl_start_io(&sc->ctlr_handle,
&(req->req_pkt), &(req->req_handle));
if (error) {
req->error_code = error;
req->req_pkt.tw_osl_callback(&(req->req_handle));
}
}
return(error);
}
/*
* Function name: tw_osli_unmap_request
* Description: Undoes the mapping done by tw_osli_map_request.
*
* Input: req -- ptr to request pkt
* Output: None
* Return value: None
*/
TW_VOID
tw_osli_unmap_request(struct tw_osli_req_context *req)
{
struct twa_softc *sc = req->ctlr;
tw_osli_dbg_dprintf(10, sc, "entered");
/* If the command involved data, unmap that too. */
if (req->data != NULL) {
if (req->flags & TW_OSLI_REQ_FLAGS_PASSTHRU) {
/* Lock against multiple simultaneous ioctl calls. */
mtx_lock_spin(sc->io_lock);
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
bus_dmamap_sync(sc->ioctl_tag,
sc->ioctl_map, BUS_DMASYNC_POSTREAD);
/*
* If we are using a bounce buffer, and we are
* reading data, copy the real data in.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
bcopy(req->data, req->real_data,
req->real_length);
}
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
bus_dmamap_sync(sc->ioctl_tag, sc->ioctl_map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->ioctl_tag, sc->ioctl_map);
mtx_unlock_spin(sc->io_lock);
} else {
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_IN) {
bus_dmamap_sync(sc->dma_tag,
req->dma_map, BUS_DMASYNC_POSTREAD);
/*
* If we are using a bounce buffer, and we are
* reading data, copy the real data in.
*/
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED)
bcopy(req->data, req->real_data,
req->real_length);
}
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_OUT)
bus_dmamap_sync(sc->dma_tag, req->dma_map,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->dma_tag, req->dma_map);
}
}
/* Free alignment buffer if it was used. */
if (req->flags & TW_OSLI_REQ_FLAGS_DATA_COPY_NEEDED) {
free(req->data, TW_OSLI_MALLOC_CLASS);
/* Restore original data pointer and length. */
req->data = req->real_data;
req->length = req->real_length;
}
}
#ifdef TW_OSL_DEBUG
TW_VOID twa_report_stats(TW_VOID);
TW_VOID twa_reset_stats(TW_VOID);
TW_VOID tw_osli_print_ctlr_stats(struct twa_softc *sc);
TW_VOID twa_print_req_info(struct tw_osli_req_context *req);
/*
* Function name: twa_report_stats
* Description: For being called from ddb. Calls functions that print
* OSL and CL internal stats for the controller.
*
* Input: None
* Output: None
* Return value: None
*/
TW_VOID
twa_report_stats(TW_VOID)
{
struct twa_softc *sc;
TW_INT32 i;
for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
tw_osli_print_ctlr_stats(sc);
tw_cl_print_ctlr_stats(&sc->ctlr_handle);
}
}
/*
* Function name: tw_osli_print_ctlr_stats
* Description: For being called from ddb. Prints OSL controller stats
*
* Input: sc -- ptr to OSL internal controller context
* Output: None
* Return value: None
*/
TW_VOID
tw_osli_print_ctlr_stats(struct twa_softc *sc)
{
twa_printf(sc, "osl_ctlr_ctxt = %p\n", sc);
twa_printf(sc, "OSLq type current max\n");
twa_printf(sc, "free %04d %04d\n",
sc->q_stats[TW_OSLI_FREE_Q].cur_len,
sc->q_stats[TW_OSLI_FREE_Q].max_len);
twa_printf(sc, "busy %04d %04d\n",
sc->q_stats[TW_OSLI_BUSY_Q].cur_len,
sc->q_stats[TW_OSLI_BUSY_Q].max_len);
}
/*
* Function name: twa_print_req_info
* Description: For being called from ddb. Calls functions that print
* OSL and CL internal details for the request.
*
* Input: req -- ptr to OSL internal request context
* Output: None
* Return value: None
*/
TW_VOID
twa_print_req_info(struct tw_osli_req_context *req)
{
struct twa_softc *sc = req->ctlr;
twa_printf(sc, "OSL details for request:\n");
twa_printf(sc, "osl_req_ctxt = %p, cl_req_ctxt = %p\n"
"data = %p, length = 0x%x, real_data = %p, real_length = 0x%x\n"
"state = 0x%x, flags = 0x%x, error = 0x%x, orig_req = %p\n"
"next_req = %p, prev_req = %p, dma_map = %p\n",
req->req_handle.osl_req_ctxt, req->req_handle.cl_req_ctxt,
req->data, req->length, req->real_data, req->real_length,
req->state, req->flags, req->error_code, req->orig_req,
req->link.next, req->link.prev, req->dma_map);
tw_cl_print_req_info(&(req->req_handle));
}
/*
* Function name: twa_reset_stats
* Description: For being called from ddb.
* Resets some OSL controller stats.
*
* Input: None
* Output: None
* Return value: None
*/
TW_VOID
twa_reset_stats(TW_VOID)
{
struct twa_softc *sc;
TW_INT32 i;
for (i = 0; (sc = devclass_get_softc(twa_devclass, i)) != NULL; i++) {
sc->q_stats[TW_OSLI_FREE_Q].max_len = 0;
sc->q_stats[TW_OSLI_BUSY_Q].max_len = 0;
tw_cl_reset_stats(&sc->ctlr_handle);
}
}
#endif /* TW_OSL_DEBUG */
#ifdef TW_OSL_DEBUG
/*
* Function name: tw_osl_dbg_printf
* Description: Prints passed info (prefixed by ctlr name)to syslog
*
* Input: ctlr_handle -- controller handle
* fmt -- format string for the arguments to follow
* ... -- variable number of arguments, to be printed
* based on the fmt string
* Output: None
* Return value: Number of bytes printed
*/
TW_INT32
tw_osl_dbg_printf(struct tw_cl_ctlr_handle *ctlr_handle,
const TW_INT8 *fmt, ...)
{
va_list args;
TW_INT32 bytes_printed;
bytes_printed = device_print_prettyname(((struct twa_softc *)
(ctlr_handle->osl_ctlr_ctxt))->bus_dev);
va_start(args, fmt);
bytes_printed += vprintf(fmt, args);
va_end(args);
return(bytes_printed);
}
#endif /* TW_OSL_DEBUG */
/*
* Function name: tw_osl_notify_event
* Description: Prints passed event info (prefixed by ctlr name)
* to syslog
*
* Input: ctlr_handle -- controller handle
* event -- ptr to a packet describing the event/error
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_notify_event(struct tw_cl_ctlr_handle *ctlr_handle,
struct tw_cl_event_packet *event)
{
struct twa_softc *sc =
(struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt);
twa_printf(sc, "%s: (0x%02X: 0x%04X): %s: %s\n",
event->severity_str,
event->event_src,
event->aen_code,
event->parameter_data +
strlen(event->parameter_data) + 1,
event->parameter_data);
}
/*
* Function name: tw_osl_read_reg
* Description: Reads a register on the controller
*
* Input: ctlr_handle -- controller handle
* offset -- offset from Base Address
* size -- # of bytes to read
* Output: None
* Return value: Value read
*/
TW_UINT32
tw_osl_read_reg(struct tw_cl_ctlr_handle *ctlr_handle,
TW_INT32 offset, TW_INT32 size)
{
bus_space_tag_t bus_tag =
((struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt))->bus_tag;
bus_space_handle_t bus_handle =
((struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt))->bus_handle;
if (size == 4)
return((TW_UINT32)bus_space_read_4(bus_tag, bus_handle,
offset));
else if (size == 2)
return((TW_UINT32)bus_space_read_2(bus_tag, bus_handle,
offset));
else
return((TW_UINT32)bus_space_read_1(bus_tag, bus_handle,
offset));
}
/*
* Function name: tw_osl_write_reg
* Description: Writes to a register on the controller
*
* Input: ctlr_handle -- controller handle
* offset -- offset from Base Address
* value -- value to write
* size -- # of bytes to write
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_write_reg(struct tw_cl_ctlr_handle *ctlr_handle,
TW_INT32 offset, TW_INT32 value, TW_INT32 size)
{
bus_space_tag_t bus_tag =
((struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt))->bus_tag;
bus_space_handle_t bus_handle =
((struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt))->bus_handle;
if (size == 4)
bus_space_write_4(bus_tag, bus_handle, offset, value);
else if (size == 2)
bus_space_write_2(bus_tag, bus_handle, offset, (TW_INT16)value);
else
bus_space_write_1(bus_tag, bus_handle, offset, (TW_INT8)value);
}
#ifdef TW_OSL_PCI_CONFIG_ACCESSIBLE
/*
* Function name: tw_osl_read_pci_config
* Description: Reads from the PCI config space.
*
* Input: sc -- ptr to per ctlr structure
* offset -- register offset
* size -- # of bytes to be read
* Output: None
* Return value: Value read
*/
TW_UINT32
tw_osl_read_pci_config(struct tw_cl_ctlr_handle *ctlr_handle,
TW_INT32 offset, TW_INT32 size)
{
struct twa_softc *sc =
(struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt);
tw_osli_dbg_dprintf(1, sc, "entered");
return(pci_read_config(sc->bus_dev, offset, size));
}
/*
* Function name: tw_osl_write_pci_config
* Description: Writes to the PCI config space.
*
* Input: sc -- ptr to per ctlr structure
* offset -- register offset
* value -- value to write
* size -- # of bytes to be written
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_write_pci_config(struct tw_cl_ctlr_handle *ctlr_handle,
TW_INT32 offset, TW_INT32 value, TW_INT32 size)
{
struct twa_softc *sc =
(struct twa_softc *)(ctlr_handle->osl_ctlr_ctxt);
tw_osli_dbg_dprintf(1, sc, "entered");
pci_write_config(sc->bus_dev, offset/*PCIR_STATUS*/, value, size);
}
#endif /* TW_OSL_PCI_CONFIG_ACCESSIBLE */
/*
* Function name: tw_osl_get_local_time
* Description: Gets the local time
*
* Input: None
* Output: None
* Return value: local time
*/
TW_TIME
tw_osl_get_local_time()
{
return(time_second - (tz_minuteswest * 60) -
(wall_cmos_clock ? adjkerntz : 0));
}
/*
* Function name: tw_osl_delay
* Description: Spin for the specified time
*
* Input: usecs -- micro-seconds to spin
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_delay(TW_INT32 usecs)
{
DELAY(usecs);
}
#ifdef TW_OSL_CAN_SLEEP
/*
* Function name: tw_osl_sleep
* Description: Sleep for the specified time, or until woken up
*
* Input: ctlr_handle -- controller handle
* sleep_handle -- handle to sleep on
* timeout -- time period (in ms) to sleep
* Output: None
* Return value: 0 -- successfully woken up
* EWOULDBLOCK -- time out
* ERESTART -- woken up by a signal
*/
TW_INT32
tw_osl_sleep(struct tw_cl_ctlr_handle *ctlr_handle,
TW_SLEEP_HANDLE *sleep_handle, TW_INT32 timeout)
{
return(tsleep((TW_VOID *)sleep_handle, PRIBIO, NULL, timeout));
}
/*
* Function name: tw_osl_wakeup
* Description: Wake up a sleeping process
*
* Input: ctlr_handle -- controller handle
* sleep_handle -- handle of sleeping process to be
woken up
* Output: None
* Return value: None
*/
TW_VOID
tw_osl_wakeup(struct tw_cl_ctlr_handle *ctlr_handle,
TW_SLEEP_HANDLE *sleep_handle)
{
wakeup_one(sleep_handle);
}
#endif /* TW_OSL_CAN_SLEEP */
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