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freebsd-skq/sys/dev/twa/tw_osl_freebsd.c
vkashyap 363d709ec6 The latest release of the FreeBSD driver (twa) for 
3ware's 9xxx series controllers.  This corresponds to
the 9.2 release (for FreeBSD 5.2.1) on the 3ware website.

Highlights of this release are:

1. The driver has been re-architected to use a "Common Layer"
    (all tw_cl* files), which is a consolidation of all OS-independent
    parts of the driver.  The FreeBSD OS specific portions of the
    driver go into an "OS Layer" (all tw_osl* files).
    This re-architecture is to achieve better maintainability, consistency
    of behavior across OS's, and better portability to new OS's (drivers
    for new OS's can be written by just adding an OS Layer that's specific
    to the OS, by complying to a "Common Layer Programming Interface" API.

2. The driver takes advantage of multiple processors.

3. The driver has a new firmware image bundled, the new features of which
   include Online Capacity Expansion and multi-lun support, among others.
   More details about 3ware's 9.2 release can be found here:
   http://www.3ware.com/download/Escalade9000Series/9.2/9.2_Release_Notes_Web.pdf

Since the Common Layer is used across OS's, the FreeBSD specific include
path for header files (/sys/dev/twa) is not part of the #include pre-processor
directive in any of the source files.  For being able to integrate twa into
the kernel despite this, Makefile.<arch> has been changed to add the include
path to CFLAGS.

Reviewed by: scottl
2005-04-12 22:07:11 +00:00

1984 lines
52 KiB
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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 "tw_osl_includes.h"
#include "tw_cl_fwif.h"
#include "tw_cl_ioctl.h"
#include "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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