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freebsd-dev/sys/dev/buslogic/bt.c
Mark Murray ed34d0ade2 Turn on interrupt-entropy harvesting for all/any mass storage devices 
I could find. I have no doubt missed a couple.

Interrupt entropy harvesting is still conditional on the
kern.random.sys.harvest_interrupt sysctl.
2001-03-01 17:09:09 +00:00

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/*
* Generic driver for the BusLogic MultiMaster SCSI host adapters
* Product specific probe and attach routines can be found in:
* sys/dev/buslogic/bt_isa.c BT-54X, BT-445 cards
* sys/dev/buslogic/bt_mca.c BT-64X, SDC3211B, SDC3211F
* sys/dev/buslogic/bt_eisa.c BT-74X, BT-75x cards, SDC3222F
* sys/dev/buslogic/bt_pci.c BT-946, BT-948, BT-956, BT-958 cards
*
* Copyright (c) 1998, 1999 Justin T. Gibbs.
* 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,
* without modification, immediately at the beginning of the file.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* $FreeBSD$
*/
/*
* Special thanks to Leonard N. Zubkoff for writing such a complete and
* well documented Mylex/BusLogic MultiMaster driver for Linux. Support
* in this driver for the wide range of MultiMaster controllers and
* firmware revisions, with their otherwise undocumented quirks, would not
* have been possible without his efforts.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/bus.h>
/*
* XXX It appears that BusLogic PCI adapters go out to lunch if you
* attempt to perform memory mapped I/O.
*/
#if 0
#include "pci.h"
#if NPCI > 0
#include <machine/bus_memio.h>
#endif
#endif
#include <machine/bus_pio.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_message.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/buslogic/btreg.h>
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
/* MailBox Management functions */
static __inline void btnextinbox(struct bt_softc *bt);
static __inline void btnextoutbox(struct bt_softc *bt);
static __inline void
btnextinbox(struct bt_softc *bt)
{
if (bt->cur_inbox == bt->last_inbox)
bt->cur_inbox = bt->in_boxes;
else
bt->cur_inbox++;
}
static __inline void
btnextoutbox(struct bt_softc *bt)
{
if (bt->cur_outbox == bt->last_outbox)
bt->cur_outbox = bt->out_boxes;
else
bt->cur_outbox++;
}
/* CCB Mangement functions */
static __inline u_int32_t btccbvtop(struct bt_softc *bt,
struct bt_ccb *bccb);
static __inline struct bt_ccb* btccbptov(struct bt_softc *bt,
u_int32_t ccb_addr);
static __inline u_int32_t btsensepaddr(struct bt_softc *bt,
struct bt_ccb *bccb);
static __inline struct scsi_sense_data* btsensevaddr(struct bt_softc *bt,
struct bt_ccb *bccb);
static __inline u_int32_t
btccbvtop(struct bt_softc *bt, struct bt_ccb *bccb)
{
return (bt->bt_ccb_physbase
+ (u_int32_t)((caddr_t)bccb - (caddr_t)bt->bt_ccb_array));
}
static __inline struct bt_ccb *
btccbptov(struct bt_softc *bt, u_int32_t ccb_addr)
{
return (bt->bt_ccb_array +
((struct bt_ccb*)ccb_addr-(struct bt_ccb*)bt->bt_ccb_physbase));
}
static __inline u_int32_t
btsensepaddr(struct bt_softc *bt, struct bt_ccb *bccb)
{
u_int index;
index = (u_int)(bccb - bt->bt_ccb_array);
return (bt->sense_buffers_physbase
+ (index * sizeof(struct scsi_sense_data)));
}
static __inline struct scsi_sense_data *
btsensevaddr(struct bt_softc *bt, struct bt_ccb *bccb)
{
u_int index;
index = (u_int)(bccb - bt->bt_ccb_array);
return (bt->sense_buffers + index);
}
static __inline struct bt_ccb* btgetccb(struct bt_softc *bt);
static __inline void btfreeccb(struct bt_softc *bt,
struct bt_ccb *bccb);
static void btallocccbs(struct bt_softc *bt);
static bus_dmamap_callback_t btexecuteccb;
static void btdone(struct bt_softc *bt, struct bt_ccb *bccb,
bt_mbi_comp_code_t comp_code);
/* Host adapter command functions */
static int btreset(struct bt_softc* bt, int hard_reset);
/* Initialization functions */
static int btinitmboxes(struct bt_softc *bt);
static bus_dmamap_callback_t btmapmboxes;
static bus_dmamap_callback_t btmapccbs;
static bus_dmamap_callback_t btmapsgs;
/* Transfer Negotiation Functions */
static void btfetchtransinfo(struct bt_softc *bt,
struct ccb_trans_settings *cts);
/* CAM SIM entry points */
#define ccb_bccb_ptr spriv_ptr0
#define ccb_bt_ptr spriv_ptr1
static void btaction(struct cam_sim *sim, union ccb *ccb);
static void btpoll(struct cam_sim *sim);
/* Our timeout handler */
timeout_t bttimeout;
u_long bt_unit = 0;
/*
* XXX
* Do our own re-probe protection until a configuration
* manager can do it for us. This ensures that we don't
* reprobe a card already found by the EISA or PCI probes.
*/
struct bt_isa_port bt_isa_ports[] =
{
{ 0x130, 0, 4 },
{ 0x134, 0, 5 },
{ 0x230, 0, 2 },
{ 0x234, 0, 3 },
{ 0x330, 0, 0 },
{ 0x334, 0, 1 }
};
/*
* I/O ports listed in the order enumerated by the
* card for certain op codes.
*/
u_int16_t bt_board_ports[] =
{
0x330,
0x334,
0x230,
0x234,
0x130,
0x134
};
/* Exported functions */
void
bt_init_softc(device_t dev, struct resource *port,
struct resource *irq, struct resource *drq)
{
struct bt_softc *bt = device_get_softc(dev);
SLIST_INIT(&bt->free_bt_ccbs);
LIST_INIT(&bt->pending_ccbs);
SLIST_INIT(&bt->sg_maps);
bt->dev = dev;
bt->unit = device_get_unit(dev);
bt->port = port;
bt->irq = irq;
bt->drq = drq;
bt->tag = rman_get_bustag(port);
bt->bsh = rman_get_bushandle(port);
}
void
bt_free_softc(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
switch (bt->init_level) {
default:
case 11:
bus_dmamap_unload(bt->sense_dmat, bt->sense_dmamap);
case 10:
bus_dmamem_free(bt->sense_dmat, bt->sense_buffers,
bt->sense_dmamap);
case 9:
bus_dma_tag_destroy(bt->sense_dmat);
case 8:
{
struct sg_map_node *sg_map;
while ((sg_map = SLIST_FIRST(&bt->sg_maps))!= NULL) {
SLIST_REMOVE_HEAD(&bt->sg_maps, links);
bus_dmamap_unload(bt->sg_dmat,
sg_map->sg_dmamap);
bus_dmamem_free(bt->sg_dmat, sg_map->sg_vaddr,
sg_map->sg_dmamap);
free(sg_map, M_DEVBUF);
}
bus_dma_tag_destroy(bt->sg_dmat);
}
case 7:
bus_dmamap_unload(bt->ccb_dmat, bt->ccb_dmamap);
case 6:
bus_dmamem_free(bt->ccb_dmat, bt->bt_ccb_array,
bt->ccb_dmamap);
bus_dmamap_destroy(bt->ccb_dmat, bt->ccb_dmamap);
case 5:
bus_dma_tag_destroy(bt->ccb_dmat);
case 4:
bus_dmamap_unload(bt->mailbox_dmat, bt->mailbox_dmamap);
case 3:
bus_dmamem_free(bt->mailbox_dmat, bt->in_boxes,
bt->mailbox_dmamap);
bus_dmamap_destroy(bt->mailbox_dmat, bt->mailbox_dmamap);
case 2:
bus_dma_tag_destroy(bt->buffer_dmat);
case 1:
bus_dma_tag_destroy(bt->mailbox_dmat);
case 0:
break;
}
}
int
bt_port_probe(device_t dev, struct bt_probe_info *info)
{
struct bt_softc *bt = device_get_softc(dev);
config_data_t config_data;
int error;
/* See if there is really a card present */
if (bt_probe(dev) || bt_fetch_adapter_info(dev))
return(1);
/*
* Determine our IRQ, and DMA settings and
* export them to the configuration system.
*/
error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
(u_int8_t*)&config_data, sizeof(config_data),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
printf("bt_port_probe: Could not determine IRQ or DMA "
"settings for adapter.\n");
return (1);
}
if (bt->model[0] == '5') {
/* DMA settings only make sense for ISA cards */
switch (config_data.dma_chan) {
case DMA_CHAN_5:
info->drq = 5;
break;
case DMA_CHAN_6:
info->drq = 6;
break;
case DMA_CHAN_7:
info->drq = 7;
break;
default:
printf("bt_port_probe: Invalid DMA setting "
"detected for adapter.\n");
return (1);
}
} else {
/* VL/EISA/PCI DMA */
info->drq = -1;
}
switch (config_data.irq) {
case IRQ_9:
case IRQ_10:
case IRQ_11:
case IRQ_12:
case IRQ_14:
case IRQ_15:
info->irq = ffs(config_data.irq) + 8;
break;
default:
printf("bt_port_probe: Invalid IRQ setting %x"
"detected for adapter.\n", config_data.irq);
return (1);
}
return (0);
}
/*
* Probe the adapter and verify that the card is a BusLogic.
*/
int
bt_probe(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
esetup_info_data_t esetup_info;
u_int status;
u_int intstat;
u_int geometry;
int error;
u_int8_t param;
/*
* See if the three I/O ports look reasonable.
* Touch the minimal number of registers in the
* failure case.
*/
status = bt_inb(bt, STATUS_REG);
if ((status == 0)
|| (status & (DIAG_ACTIVE|CMD_REG_BUSY|
STATUS_REG_RSVD|CMD_INVALID)) != 0) {
if (bootverbose)
device_printf(dev, "Failed Status Reg Test - %x\n",
status);
return (ENXIO);
}
intstat = bt_inb(bt, INTSTAT_REG);
if ((intstat & INTSTAT_REG_RSVD) != 0) {
device_printf(dev, "Failed Intstat Reg Test\n");
return (ENXIO);
}
geometry = bt_inb(bt, GEOMETRY_REG);
if (geometry == 0xFF) {
if (bootverbose)
device_printf(dev, "Failed Geometry Reg Test\n");
return (ENXIO);
}
/*
* Looking good so far. Final test is to reset the
* adapter and attempt to fetch the extended setup
* information. This should filter out all 1542 cards.
*/
if ((error = btreset(bt, /*hard_reset*/TRUE)) != 0) {
if (bootverbose)
device_printf(dev, "Failed Reset\n");
return (ENXIO);
}
param = sizeof(esetup_info);
error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &param, /*parmlen*/1,
(u_int8_t*)&esetup_info, sizeof(esetup_info),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
return (ENXIO);
}
return (0);
}
/*
* Pull the boards setup information and record it in our softc.
*/
int
bt_fetch_adapter_info(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
board_id_data_t board_id;
esetup_info_data_t esetup_info;
config_data_t config_data;
int error;
u_int8_t length_param;
/* First record the firmware version */
error = bt_cmd(bt, BOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
(u_int8_t*)&board_id, sizeof(board_id),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev, "bt_fetch_adapter_info - Failed Get Board Info\n");
return (error);
}
bt->firmware_ver[0] = board_id.firmware_rev_major;
bt->firmware_ver[1] = '.';
bt->firmware_ver[2] = board_id.firmware_rev_minor;
bt->firmware_ver[3] = '\0';
/*
* Depending on the firmware major and minor version,
* we may be able to fetch additional minor version info.
*/
if (bt->firmware_ver[0] > '0') {
error = bt_cmd(bt, BOP_INQUIRE_FW_VER_3DIG, NULL, /*parmlen*/0,
(u_int8_t*)&bt->firmware_ver[3], 1,
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed Get "
"Firmware 3rd Digit\n");
return (error);
}
if (bt->firmware_ver[3] == ' ')
bt->firmware_ver[3] = '\0';
bt->firmware_ver[4] = '\0';
}
if (strcmp(bt->firmware_ver, "3.3") >= 0) {
error = bt_cmd(bt, BOP_INQUIRE_FW_VER_4DIG, NULL, /*parmlen*/0,
(u_int8_t*)&bt->firmware_ver[4], 1,
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed Get "
"Firmware 4th Digit\n");
return (error);
}
if (bt->firmware_ver[4] == ' ')
bt->firmware_ver[4] = '\0';
bt->firmware_ver[5] = '\0';
}
/*
* Some boards do not handle the "recently documented"
* Inquire Board Model Number command correctly or do not give
* exact information. Use the Firmware and Extended Setup
* information in these cases to come up with the right answer.
* The major firmware revision number indicates:
*
* 5.xx BusLogic "W" Series Host Adapters:
* BT-948/958/958D
* 4.xx BusLogic "C" Series Host Adapters:
* BT-946C/956C/956CD/747C/757C/757CD/445C/545C/540CF
* 3.xx BusLogic "S" Series Host Adapters:
* BT-747S/747D/757S/757D/445S/545S/542D
* BT-542B/742A (revision H)
* 2.xx BusLogic "A" Series Host Adapters:
* BT-542B/742A (revision G and below)
* 0.xx AMI FastDisk VLB/EISA BusLogic Clone Host Adapter
*/
length_param = sizeof(esetup_info);
error = bt_cmd(bt, BOP_INQUIRE_ESETUP_INFO, &length_param, /*parmlen*/1,
(u_int8_t*)&esetup_info, sizeof(esetup_info),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
return (error);
}
bt->bios_addr = esetup_info.bios_addr << 12;
bt->mailbox_addrlimit = BUS_SPACE_MAXADDR;
if (esetup_info.bus_type == 'A'
&& bt->firmware_ver[0] == '2') {
snprintf(bt->model, sizeof(bt->model), "542B");
} else if (esetup_info.bus_type == 'E'
&& bt->firmware_ver[0] == '2') {
/*
* The 742A seems to object if its mailboxes are
* allocated above the 16MB mark.
*/
bt->mailbox_addrlimit = BUS_SPACE_MAXADDR_24BIT;
snprintf(bt->model, sizeof(bt->model), "742A");
} else if (esetup_info.bus_type == 'E'
&& bt->firmware_ver[0] == '0') {
/* AMI FastDisk EISA Series 441 0.x */
snprintf(bt->model, sizeof(bt->model), "747A");
} else {
ha_model_data_t model_data;
int i;
length_param = sizeof(model_data);
error = bt_cmd(bt, BOP_INQUIRE_MODEL, &length_param, 1,
(u_int8_t*)&model_data, sizeof(model_data),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed Inquire "
"Model Number\n");
return (error);
}
for (i = 0; i < sizeof(model_data.ascii_model); i++) {
bt->model[i] = model_data.ascii_model[i];
if (bt->model[i] == ' ')
break;
}
bt->model[i] = '\0';
}
bt->level_trigger_ints = esetup_info.level_trigger_ints ? 1 : 0;
/* SG element limits */
bt->max_sg = esetup_info.max_sg;
/* Set feature flags */
bt->wide_bus = esetup_info.wide_bus;
bt->diff_bus = esetup_info.diff_bus;
bt->ultra_scsi = esetup_info.ultra_scsi;
if ((bt->firmware_ver[0] == '5')
|| (bt->firmware_ver[0] == '4' && bt->wide_bus))
bt->extended_lun = TRUE;
bt->strict_rr = (strcmp(bt->firmware_ver, "3.31") >= 0);
bt->extended_trans =
((bt_inb(bt, GEOMETRY_REG) & EXTENDED_TRANSLATION) != 0);
/*
* Determine max CCB count and whether tagged queuing is
* available based on controller type. Tagged queuing
* only works on 'W' series adapters, 'C' series adapters
* with firmware of rev 4.42 and higher, and 'S' series
* adapters with firmware of rev 3.35 and higher. The
* maximum CCB counts are as follows:
*
* 192 BT-948/958/958D
* 100 BT-946C/956C/956CD/747C/757C/757CD/445C
* 50 BT-545C/540CF
* 30 BT-747S/747D/757S/757D/445S/545S/542D/542B/742A
*/
if (bt->firmware_ver[0] == '5') {
bt->max_ccbs = 192;
bt->tag_capable = TRUE;
} else if (bt->firmware_ver[0] == '4') {
if (bt->model[0] == '5')
bt->max_ccbs = 50;
else
bt->max_ccbs = 100;
bt->tag_capable = (strcmp(bt->firmware_ver, "4.22") >= 0);
} else {
bt->max_ccbs = 30;
if (bt->firmware_ver[0] == '3'
&& (strcmp(bt->firmware_ver, "3.35") >= 0))
bt->tag_capable = TRUE;
else
bt->tag_capable = FALSE;
}
if (bt->tag_capable != FALSE)
bt->tags_permitted = ALL_TARGETS;
/* Determine Sync/Wide/Disc settings */
if (bt->firmware_ver[0] >= '4') {
auto_scsi_data_t auto_scsi_data;
fetch_lram_params_t fetch_lram_params;
int error;
/*
* These settings are stored in the
* AutoSCSI data in LRAM of 'W' and 'C'
* adapters.
*/
fetch_lram_params.offset = AUTO_SCSI_BYTE_OFFSET;
fetch_lram_params.response_len = sizeof(auto_scsi_data);
error = bt_cmd(bt, BOP_FETCH_LRAM,
(u_int8_t*)&fetch_lram_params,
sizeof(fetch_lram_params),
(u_int8_t*)&auto_scsi_data,
sizeof(auto_scsi_data), DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed "
"Get Auto SCSI Info\n");
return (error);
}
bt->disc_permitted = auto_scsi_data.low_disc_permitted
| (auto_scsi_data.high_disc_permitted << 8);
bt->sync_permitted = auto_scsi_data.low_sync_permitted
| (auto_scsi_data.high_sync_permitted << 8);
bt->fast_permitted = auto_scsi_data.low_fast_permitted
| (auto_scsi_data.high_fast_permitted << 8);
bt->ultra_permitted = auto_scsi_data.low_ultra_permitted
| (auto_scsi_data.high_ultra_permitted << 8);
bt->wide_permitted = auto_scsi_data.low_wide_permitted
| (auto_scsi_data.high_wide_permitted << 8);
if (bt->ultra_scsi == FALSE)
bt->ultra_permitted = 0;
if (bt->wide_bus == FALSE)
bt->wide_permitted = 0;
} else {
/*
* 'S' and 'A' series have this information in the setup
* information structure.
*/
setup_data_t setup_info;
length_param = sizeof(setup_info);
error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &length_param,
/*paramlen*/1, (u_int8_t*)&setup_info,
sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed "
"Get Setup Info\n");
return (error);
}
if (setup_info.initiate_sync != 0) {
bt->sync_permitted = ALL_TARGETS;
if (bt->model[0] == '7') {
if (esetup_info.sync_neg10MB != 0)
bt->fast_permitted = ALL_TARGETS;
if (strcmp(bt->model, "757") == 0)
bt->wide_permitted = ALL_TARGETS;
}
}
bt->disc_permitted = ALL_TARGETS;
}
/* We need as many mailboxes as we can have ccbs */
bt->num_boxes = bt->max_ccbs;
/* Determine our SCSI ID */
error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
(u_int8_t*)&config_data, sizeof(config_data),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
device_printf(dev,
"bt_fetch_adapter_info - Failed Get Config\n");
return (error);
}
bt->scsi_id = config_data.scsi_id;
return (0);
}
/*
* Start the board, ready for normal operation
*/
int
bt_init(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
/* Announce the Adapter */
device_printf(dev, "BT-%s FW Rev. %s ", bt->model, bt->firmware_ver);
if (bt->ultra_scsi != 0)
printf("Ultra ");
if (bt->wide_bus != 0)
printf("Wide ");
else
printf("Narrow ");
if (bt->diff_bus != 0)
printf("Diff ");
printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", bt->scsi_id,
bt->max_ccbs);
/*
* Create our DMA tags. These tags define the kinds of device
* accessible memory allocations and memory mappings we will
* need to perform during normal operation.
*
* Unless we need to further restrict the allocation, we rely
* on the restrictions of the parent dmat, hence the common
* use of MAXADDR and MAXSIZE.
*/
/* DMA tag for mapping buffers into device visible space. */
if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
/*maxsize*/MAXBSIZE, /*nsegments*/BT_NSEG,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/BUS_DMA_ALLOCNOW,
&bt->buffer_dmat) != 0) {
goto error_exit;
}
bt->init_level++;
/* DMA tag for our mailboxes */
if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
/*lowaddr*/bt->mailbox_addrlimit,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
bt->num_boxes * (sizeof(bt_mbox_in_t)
+ sizeof(bt_mbox_out_t)),
/*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->mailbox_dmat) != 0) {
goto error_exit;
}
bt->init_level++;
/* Allocation for our mailboxes */
if (bus_dmamem_alloc(bt->mailbox_dmat, (void **)&bt->out_boxes,
BUS_DMA_NOWAIT, &bt->mailbox_dmamap) != 0) {
goto error_exit;
}
bt->init_level++;
/* And permanently map them */
bus_dmamap_load(bt->mailbox_dmat, bt->mailbox_dmamap,
bt->out_boxes,
bt->num_boxes * (sizeof(bt_mbox_in_t)
+ sizeof(bt_mbox_out_t)),
btmapmboxes, bt, /*flags*/0);
bt->init_level++;
bt->in_boxes = (bt_mbox_in_t *)&bt->out_boxes[bt->num_boxes];
btinitmboxes(bt);
/* DMA tag for our ccb structures */
if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
bt->max_ccbs * sizeof(struct bt_ccb),
/*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->ccb_dmat) != 0) {
goto error_exit;
}
bt->init_level++;
/* Allocation for our ccbs */
if (bus_dmamem_alloc(bt->ccb_dmat, (void **)&bt->bt_ccb_array,
BUS_DMA_NOWAIT, &bt->ccb_dmamap) != 0) {
goto error_exit;
}
bt->init_level++;
/* And permanently map them */
bus_dmamap_load(bt->ccb_dmat, bt->ccb_dmamap,
bt->bt_ccb_array,
bt->max_ccbs * sizeof(struct bt_ccb),
btmapccbs, bt, /*flags*/0);
bt->init_level++;
/* DMA tag for our S/G structures. We allocate in page sized chunks */
if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/1, /*boundary*/0,
/*lowaddr*/BUS_SPACE_MAXADDR,
/*highaddr*/BUS_SPACE_MAXADDR,
/*filter*/NULL, /*filterarg*/NULL,
PAGE_SIZE, /*nsegments*/1,
/*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT,
/*flags*/0, &bt->sg_dmat) != 0) {
goto error_exit;
}
bt->init_level++;
/* Perform initial CCB allocation */
bzero(bt->bt_ccb_array, bt->max_ccbs * sizeof(struct bt_ccb));
btallocccbs(bt);
if (bt->num_ccbs == 0) {
device_printf(dev,
"bt_init - Unable to allocate initial ccbs\n");
goto error_exit;
}
/*
* Note that we are going and return (to probe)
*/
return 0;
error_exit:
return (ENXIO);
}
int
bt_attach(device_t dev)
{
struct bt_softc *bt = device_get_softc(dev);
int tagged_dev_openings;
struct cam_devq *devq;
int error;
/*
* We reserve 1 ccb for error recovery, so don't
* tell the XPT about it.
*/
if (bt->tag_capable != 0)
tagged_dev_openings = bt->max_ccbs - 1;
else
tagged_dev_openings = 0;
/*
* Create the device queue for our SIM.
*/
devq = cam_simq_alloc(bt->max_ccbs - 1);
if (devq == NULL)
return (ENOMEM);
/*
* Construct our SIM entry
*/
bt->sim = cam_sim_alloc(btaction, btpoll, "bt", bt, bt->unit,
2, tagged_dev_openings, devq);
if (bt->sim == NULL) {
cam_simq_free(devq);
return (ENOMEM);
}
if (xpt_bus_register(bt->sim, 0) != CAM_SUCCESS) {
cam_sim_free(bt->sim, /*free_devq*/TRUE);
return (ENXIO);
}
if (xpt_create_path(&bt->path, /*periph*/NULL,
cam_sim_path(bt->sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(bt->sim));
cam_sim_free(bt->sim, /*free_devq*/TRUE);
return (ENXIO);
}
/*
* Setup interrupt.
*/
error = bus_setup_intr(dev, bt->irq, INTR_TYPE_CAM|INTR_ENTROPY,
bt_intr, bt, &bt->ih);
if (error) {
device_printf(dev, "bus_setup_intr() failed: %d\n", error);
return (error);
}
return (0);
}
int
bt_check_probed_iop(u_int ioport)
{
u_int i;
for (i = 0; i < BT_NUM_ISAPORTS; i++) {
if (bt_isa_ports[i].addr == ioport) {
if (bt_isa_ports[i].probed != 0)
return (1);
else {
return (0);
}
}
}
return (1);
}
void
bt_mark_probed_bio(isa_compat_io_t port)
{
if (port < BIO_DISABLED)
bt_mark_probed_iop(bt_board_ports[port]);
}
void
bt_mark_probed_iop(u_int ioport)
{
u_int i;
for (i = 0; i < BT_NUM_ISAPORTS; i++) {
if (ioport == bt_isa_ports[i].addr) {
bt_isa_ports[i].probed = 1;
break;
}
}
}
void
bt_find_probe_range(int ioport, int *port_index, int *max_port_index)
{
if (ioport > 0) {
int i;
for (i = 0;i < BT_NUM_ISAPORTS; i++)
if (ioport <= bt_isa_ports[i].addr)
break;
if ((i >= BT_NUM_ISAPORTS)
|| (ioport != bt_isa_ports[i].addr)) {
printf("
bt_isa_probe: Invalid baseport of 0x%x specified.
bt_isa_probe: Nearest valid baseport is 0x%x.
bt_isa_probe: Failing probe.\n",
ioport,
(i < BT_NUM_ISAPORTS)
? bt_isa_ports[i].addr
: bt_isa_ports[BT_NUM_ISAPORTS - 1].addr);
*port_index = *max_port_index = -1;
return;
}
*port_index = *max_port_index = bt_isa_ports[i].bio;
} else {
*port_index = 0;
*max_port_index = BT_NUM_ISAPORTS - 1;
}
}
int
bt_iop_from_bio(isa_compat_io_t bio_index)
{
if (bio_index >= 0 && bio_index < BT_NUM_ISAPORTS)
return (bt_board_ports[bio_index]);
return (-1);
}
static void
btallocccbs(struct bt_softc *bt)
{
struct bt_ccb *next_ccb;
struct sg_map_node *sg_map;
bus_addr_t physaddr;
bt_sg_t *segs;
int newcount;
int i;
if (bt->num_ccbs >= bt->max_ccbs)
/* Can't allocate any more */
return;
next_ccb = &bt->bt_ccb_array[bt->num_ccbs];
sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
if (sg_map == NULL)
goto error_exit;
/* Allocate S/G space for the next batch of CCBS */
if (bus_dmamem_alloc(bt->sg_dmat, (void **)&sg_map->sg_vaddr,
BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
free(sg_map, M_DEVBUF);
goto error_exit;
}
SLIST_INSERT_HEAD(&bt->sg_maps, sg_map, links);
bus_dmamap_load(bt->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
PAGE_SIZE, btmapsgs, bt, /*flags*/0);
segs = sg_map->sg_vaddr;
physaddr = sg_map->sg_physaddr;
newcount = (PAGE_SIZE / (BT_NSEG * sizeof(bt_sg_t)));
for (i = 0; bt->num_ccbs < bt->max_ccbs && i < newcount; i++) {
int error;
next_ccb->sg_list = segs;
next_ccb->sg_list_phys = physaddr;
next_ccb->flags = BCCB_FREE;
error = bus_dmamap_create(bt->buffer_dmat, /*flags*/0,
&next_ccb->dmamap);
if (error != 0)
break;
SLIST_INSERT_HEAD(&bt->free_bt_ccbs, next_ccb, links);
segs += BT_NSEG;
physaddr += (BT_NSEG * sizeof(bt_sg_t));
next_ccb++;
bt->num_ccbs++;
}
/* Reserve a CCB for error recovery */
if (bt->recovery_bccb == NULL) {
bt->recovery_bccb = SLIST_FIRST(&bt->free_bt_ccbs);
SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
}
if (SLIST_FIRST(&bt->free_bt_ccbs) != NULL)
return;
error_exit:
device_printf(bt->dev, "Can't malloc BCCBs\n");
}
static __inline void
btfreeccb(struct bt_softc *bt, struct bt_ccb *bccb)
{
int s;
s = splcam();
if ((bccb->flags & BCCB_ACTIVE) != 0)
LIST_REMOVE(&bccb->ccb->ccb_h, sim_links.le);
if (bt->resource_shortage != 0
&& (bccb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
bccb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
bt->resource_shortage = FALSE;
}
bccb->flags = BCCB_FREE;
SLIST_INSERT_HEAD(&bt->free_bt_ccbs, bccb, links);
bt->active_ccbs--;
splx(s);
}
static __inline struct bt_ccb*
btgetccb(struct bt_softc *bt)
{
struct bt_ccb* bccb;
int s;
s = splcam();
if ((bccb = SLIST_FIRST(&bt->free_bt_ccbs)) != NULL) {
SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
bt->active_ccbs++;
} else {
btallocccbs(bt);
bccb = SLIST_FIRST(&bt->free_bt_ccbs);
if (bccb != NULL) {
SLIST_REMOVE_HEAD(&bt->free_bt_ccbs, links);
bt->active_ccbs++;
}
}
splx(s);
return (bccb);
}
static void
btaction(struct cam_sim *sim, union ccb *ccb)
{
struct bt_softc *bt;
CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("btaction\n"));
bt = (struct bt_softc *)cam_sim_softc(sim);
switch (ccb->ccb_h.func_code) {
/* Common cases first */
case XPT_SCSI_IO: /* Execute the requested I/O operation */
case XPT_RESET_DEV: /* Bus Device Reset the specified SCSI device */
{
struct bt_ccb *bccb;
struct bt_hccb *hccb;
/*
* get a bccb to use.
*/
if ((bccb = btgetccb(bt)) == NULL) {
int s;
s = splcam();
bt->resource_shortage = TRUE;
splx(s);
xpt_freeze_simq(bt->sim, /*count*/1);
ccb->ccb_h.status = CAM_REQUEUE_REQ;
xpt_done(ccb);
return;
}
hccb = &bccb->hccb;
/*
* So we can find the BCCB when an abort is requested
*/
bccb->ccb = ccb;
ccb->ccb_h.ccb_bccb_ptr = bccb;
ccb->ccb_h.ccb_bt_ptr = bt;
/*
* Put all the arguments for the xfer in the bccb
*/
hccb->target_id = ccb->ccb_h.target_id;
hccb->target_lun = ccb->ccb_h.target_lun;
hccb->btstat = 0;
hccb->sdstat = 0;
if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
struct ccb_scsiio *csio;
struct ccb_hdr *ccbh;
csio = &ccb->csio;
ccbh = &csio->ccb_h;
hccb->opcode = INITIATOR_CCB_WRESID;
hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) ? 1 : 0;
hccb->dataout =(ccb->ccb_h.flags & CAM_DIR_OUT) ? 1 : 0;
hccb->cmd_len = csio->cdb_len;
if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
ccb->ccb_h.status = CAM_REQ_INVALID;
btfreeccb(bt, bccb);
xpt_done(ccb);
return;
}
hccb->sense_len = csio->sense_len;
if ((ccbh->flags & CAM_TAG_ACTION_VALID) != 0
&& ccb->csio.tag_action != CAM_TAG_ACTION_NONE) {
hccb->tag_enable = TRUE;
hccb->tag_type = (ccb->csio.tag_action & 0x3);
} else {
hccb->tag_enable = FALSE;
hccb->tag_type = 0;
}
if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
bcopy(csio->cdb_io.cdb_ptr,
hccb->scsi_cdb, hccb->cmd_len);
} else {
/* I guess I could map it in... */
ccbh->status = CAM_REQ_INVALID;
btfreeccb(bt, bccb);
xpt_done(ccb);
return;
}
} else {
bcopy(csio->cdb_io.cdb_bytes,
hccb->scsi_cdb, hccb->cmd_len);
}
/* If need be, bounce our sense buffer */
if (bt->sense_buffers != NULL) {
hccb->sense_addr = btsensepaddr(bt, bccb);
} else {
hccb->sense_addr = vtophys(&csio->sense_data);
}
/*
* If we have any data to send with this command,
* map it into bus space.
*/
/* Only use S/G if there is a transfer */
if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
/*
* We've been given a pointer
* to a single buffer.
*/
if ((ccbh->flags & CAM_DATA_PHYS)==0) {
int s;
int error;
s = splsoftvm();
error = bus_dmamap_load(
bt->buffer_dmat,
bccb->dmamap,
csio->data_ptr,
csio->dxfer_len,
btexecuteccb,
bccb,
/*flags*/0);
if (error == EINPROGRESS) {
/*
* So as to maintain
* ordering, freeze the
* controller queue
* until our mapping is
* returned.
*/
xpt_freeze_simq(bt->sim,
1);
csio->ccb_h.status |=
CAM_RELEASE_SIMQ;
}
splx(s);
} else {
struct bus_dma_segment seg;
/* Pointer to physical buffer */
seg.ds_addr =
(bus_addr_t)csio->data_ptr;
seg.ds_len = csio->dxfer_len;
btexecuteccb(bccb, &seg, 1, 0);
}
} else {
struct bus_dma_segment *segs;
if ((ccbh->flags & CAM_DATA_PHYS) != 0)
panic("btaction - Physical "
"segment pointers "
"unsupported");
if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
panic("btaction - Virtual "
"segment addresses "
"unsupported");
/* Just use the segments provided */
segs = (struct bus_dma_segment *)
csio->data_ptr;
btexecuteccb(bccb, segs,
csio->sglist_cnt, 0);
}
} else {
btexecuteccb(bccb, NULL, 0, 0);
}
} else {
hccb->opcode = INITIATOR_BUS_DEV_RESET;
/* No data transfer */
hccb->datain = TRUE;
hccb->dataout = TRUE;
hccb->cmd_len = 0;
hccb->sense_len = 0;
hccb->tag_enable = FALSE;
hccb->tag_type = 0;
btexecuteccb(bccb, NULL, 0, 0);
}
break;
}
case XPT_EN_LUN: /* Enable LUN as a target */
case XPT_TARGET_IO: /* Execute target I/O request */
case XPT_ACCEPT_TARGET_IO: /* Accept Host Target Mode CDB */
case XPT_CONT_TARGET_IO: /* Continue Host Target I/O Connection*/
case XPT_ABORT: /* Abort the specified CCB */
/* XXX Implement */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_SET_TRAN_SETTINGS:
{
/* XXX Implement */
ccb->ccb_h.status = CAM_PROVIDE_FAIL;
xpt_done(ccb);
break;
}
case XPT_GET_TRAN_SETTINGS:
/* Get default/user set transfer settings for the target */
{
struct ccb_trans_settings *cts;
u_int target_mask;
cts = &ccb->cts;
target_mask = 0x01 << ccb->ccb_h.target_id;
if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) {
cts->flags = 0;
if ((bt->disc_permitted & target_mask) != 0)
cts->flags |= CCB_TRANS_DISC_ENB;
if ((bt->tags_permitted & target_mask) != 0)
cts->flags |= CCB_TRANS_TAG_ENB;
if ((bt->wide_permitted & target_mask) != 0)
cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
else
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
if ((bt->ultra_permitted & target_mask) != 0)
cts->sync_period = 12;
else if ((bt->fast_permitted & target_mask) != 0)
cts->sync_period = 25;
else if ((bt->sync_permitted & target_mask) != 0)
cts->sync_period = 50;
else
cts->sync_period = 0;
if (cts->sync_period != 0)
cts->sync_offset = 15;
cts->valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID
| CCB_TRANS_BUS_WIDTH_VALID
| CCB_TRANS_DISC_VALID
| CCB_TRANS_TQ_VALID;
} else {
btfetchtransinfo(bt, cts);
}
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
u_int32_t size_mb;
u_int32_t secs_per_cylinder;
ccg = &ccb->ccg;
size_mb = ccg->volume_size
/ ((1024L * 1024L) / ccg->block_size);
if (size_mb >= 1024 && (bt->extended_trans != 0)) {
if (size_mb >= 2048) {
ccg->heads = 255;
ccg->secs_per_track = 63;
} else {
ccg->heads = 128;
ccg->secs_per_track = 32;
}
} else {
ccg->heads = 64;
ccg->secs_per_track = 32;
}
secs_per_cylinder = ccg->heads * ccg->secs_per_track;
ccg->cylinders = ccg->volume_size / secs_per_cylinder;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_RESET_BUS: /* Reset the specified SCSI bus */
{
btreset(bt, /*hardreset*/TRUE);
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_TERM_IO: /* Terminate the I/O process */
/* XXX Implement */
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
case XPT_PATH_INQ: /* Path routing inquiry */
{
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = 1; /* XXX??? */
cpi->hba_inquiry = PI_SDTR_ABLE;
if (bt->tag_capable != 0)
cpi->hba_inquiry |= PI_TAG_ABLE;
if (bt->wide_bus != 0)
cpi->hba_inquiry |= PI_WIDE_16;
cpi->target_sprt = 0;
cpi->hba_misc = 0;
cpi->hba_eng_cnt = 0;
cpi->max_target = bt->wide_bus ? 15 : 7;
cpi->max_lun = 7;
cpi->initiator_id = bt->scsi_id;
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 3300;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "BusLogic", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static void
btexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
{
struct bt_ccb *bccb;
union ccb *ccb;
struct bt_softc *bt;
int s;
bccb = (struct bt_ccb *)arg;
ccb = bccb->ccb;
bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
if (error != 0) {
if (error != EFBIG)
device_printf(bt->dev,
"Unexepected error 0x%x returned from "
"bus_dmamap_load\n", error);
if (ccb->ccb_h.status == CAM_REQ_INPROG) {
xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
}
btfreeccb(bt, bccb);
xpt_done(ccb);
return;
}
if (nseg != 0) {
bt_sg_t *sg;
bus_dma_segment_t *end_seg;
bus_dmasync_op_t op;
end_seg = dm_segs + nseg;
/* Copy the segments into our SG list */
sg = bccb->sg_list;
while (dm_segs < end_seg) {
sg->len = dm_segs->ds_len;
sg->addr = dm_segs->ds_addr;
sg++;
dm_segs++;
}
if (nseg > 1) {
bccb->hccb.opcode = INITIATOR_SG_CCB_WRESID;
bccb->hccb.data_len = sizeof(bt_sg_t) * nseg;
bccb->hccb.data_addr = bccb->sg_list_phys;
} else {
bccb->hccb.data_len = bccb->sg_list->len;
bccb->hccb.data_addr = bccb->sg_list->addr;
}
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_PREREAD;
else
op = BUS_DMASYNC_PREWRITE;
bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
} else {
bccb->hccb.opcode = INITIATOR_CCB;
bccb->hccb.data_len = 0;
bccb->hccb.data_addr = 0;
}
s = splcam();
/*
* Last time we need to check if this CCB needs to
* be aborted.
*/
if (ccb->ccb_h.status != CAM_REQ_INPROG) {
if (nseg != 0)
bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
btfreeccb(bt, bccb);
xpt_done(ccb);
splx(s);
return;
}
bccb->flags = BCCB_ACTIVE;
ccb->ccb_h.status |= CAM_SIM_QUEUED;
LIST_INSERT_HEAD(&bt->pending_ccbs, &ccb->ccb_h, sim_links.le);
ccb->ccb_h.timeout_ch =
timeout(bttimeout, (caddr_t)bccb,
(ccb->ccb_h.timeout * hz) / 1000);
/* Tell the adapter about this command */
bt->cur_outbox->ccb_addr = btccbvtop(bt, bccb);
if (bt->cur_outbox->action_code != BMBO_FREE) {
/*
* We should never encounter a busy mailbox.
* If we do, warn the user, and treat it as
* a resource shortage. If the controller is
* hung, one of the pending transactions will
* timeout causing us to start recovery operations.
*/
device_printf(bt->dev,
"Encountered busy mailbox with %d out of %d "
"commands active!!!\n", bt->active_ccbs,
bt->max_ccbs);
untimeout(bttimeout, bccb, ccb->ccb_h.timeout_ch);
if (nseg != 0)
bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
btfreeccb(bt, bccb);
bt->resource_shortage = TRUE;
xpt_freeze_simq(bt->sim, /*count*/1);
ccb->ccb_h.status = CAM_REQUEUE_REQ;
xpt_done(ccb);
return;
}
bt->cur_outbox->action_code = BMBO_START;
bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
btnextoutbox(bt);
splx(s);
}
void
bt_intr(void *arg)
{
struct bt_softc *bt;
u_int intstat;
bt = (struct bt_softc *)arg;
while (((intstat = bt_inb(bt, INTSTAT_REG)) & INTR_PENDING) != 0) {
if ((intstat & CMD_COMPLETE) != 0) {
bt->latched_status = bt_inb(bt, STATUS_REG);
bt->command_cmp = TRUE;
}
bt_outb(bt, CONTROL_REG, RESET_INTR);
if ((intstat & IMB_LOADED) != 0) {
while (bt->cur_inbox->comp_code != BMBI_FREE) {
btdone(bt,
btccbptov(bt, bt->cur_inbox->ccb_addr),
bt->cur_inbox->comp_code);
bt->cur_inbox->comp_code = BMBI_FREE;
btnextinbox(bt);
}
}
if ((intstat & SCSI_BUS_RESET) != 0) {
btreset(bt, /*hardreset*/FALSE);
}
}
}
static void
btdone(struct bt_softc *bt, struct bt_ccb *bccb, bt_mbi_comp_code_t comp_code)
{
union ccb *ccb;
struct ccb_scsiio *csio;
ccb = bccb->ccb;
csio = &bccb->ccb->csio;
if ((bccb->flags & BCCB_ACTIVE) == 0) {
device_printf(bt->dev,
"btdone - Attempt to free non-active BCCB %p\n",
(void *)bccb);
return;
}
if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
bus_dmasync_op_t op;
if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
op = BUS_DMASYNC_POSTREAD;
else
op = BUS_DMASYNC_POSTWRITE;
bus_dmamap_sync(bt->buffer_dmat, bccb->dmamap, op);
bus_dmamap_unload(bt->buffer_dmat, bccb->dmamap);
}
if (bccb == bt->recovery_bccb) {
/*
* The recovery BCCB does not have a CCB associated
* with it, so short circuit the normal error handling.
* We now traverse our list of pending CCBs and process
* any that were terminated by the recovery CCBs action.
* We also reinstate timeouts for all remaining, pending,
* CCBs.
*/
struct cam_path *path;
struct ccb_hdr *ccb_h;
cam_status error;
/* Notify all clients that a BDR occured */
error = xpt_create_path(&path, /*periph*/NULL,
cam_sim_path(bt->sim),
bccb->hccb.target_id,
CAM_LUN_WILDCARD);
if (error == CAM_REQ_CMP)
xpt_async(AC_SENT_BDR, path, NULL);
ccb_h = LIST_FIRST(&bt->pending_ccbs);
while (ccb_h != NULL) {
struct bt_ccb *pending_bccb;
pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
if (pending_bccb->hccb.target_id
== bccb->hccb.target_id) {
pending_bccb->hccb.btstat = BTSTAT_HA_BDR;
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
btdone(bt, pending_bccb, BMBI_ERROR);
} else {
ccb_h->timeout_ch =
timeout(bttimeout, (caddr_t)pending_bccb,
(ccb_h->timeout * hz) / 1000);
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
}
}
device_printf(bt->dev, "No longer in timeout\n");
return;
}
untimeout(bttimeout, bccb, ccb->ccb_h.timeout_ch);
switch (comp_code) {
case BMBI_FREE:
device_printf(bt->dev,
"btdone - CCB completed with free status!\n");
break;
case BMBI_NOT_FOUND:
device_printf(bt->dev,
"btdone - CCB Abort failed to find CCB\n");
break;
case BMBI_ABORT:
case BMBI_ERROR:
if (bootverbose) {
printf("bt: ccb %p - error %x occured. "
"btstat = %x, sdstat = %x\n",
(void *)bccb, comp_code, bccb->hccb.btstat,
bccb->hccb.sdstat);
}
/* An error occured */
switch(bccb->hccb.btstat) {
case BTSTAT_DATARUN_ERROR:
if (bccb->hccb.data_len == 0) {
/*
* At least firmware 4.22, does this
* for a QUEUE FULL condition.
*/
bccb->hccb.sdstat = SCSI_STATUS_QUEUE_FULL;
} else if (bccb->hccb.data_len < 0) {
csio->ccb_h.status = CAM_DATA_RUN_ERR;
break;
}
/* FALLTHROUGH */
case BTSTAT_NOERROR:
case BTSTAT_LINKED_CMD_COMPLETE:
case BTSTAT_LINKED_CMD_FLAG_COMPLETE:
case BTSTAT_DATAUNDERUN_ERROR:
csio->scsi_status = bccb->hccb.sdstat;
csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
switch(csio->scsi_status) {
case SCSI_STATUS_CHECK_COND:
case SCSI_STATUS_CMD_TERMINATED:
csio->ccb_h.status |= CAM_AUTOSNS_VALID;
/* Bounce sense back if necessary */
if (bt->sense_buffers != NULL) {
csio->sense_data =
*btsensevaddr(bt, bccb);
}
break;
default:
break;
case SCSI_STATUS_OK:
csio->ccb_h.status = CAM_REQ_CMP;
break;
}
csio->resid = bccb->hccb.data_len;
break;
case BTSTAT_SELTIMEOUT:
csio->ccb_h.status = CAM_SEL_TIMEOUT;
break;
case BTSTAT_UNEXPECTED_BUSFREE:
csio->ccb_h.status = CAM_UNEXP_BUSFREE;
break;
case BTSTAT_INVALID_PHASE:
csio->ccb_h.status = CAM_SEQUENCE_FAIL;
break;
case BTSTAT_INVALID_ACTION_CODE:
panic("%s: Inavlid Action code", bt_name(bt));
break;
case BTSTAT_INVALID_OPCODE:
panic("%s: Inavlid CCB Opcode code", bt_name(bt));
break;
case BTSTAT_LINKED_CCB_LUN_MISMATCH:
/* We don't even support linked commands... */
panic("%s: Linked CCB Lun Mismatch", bt_name(bt));
break;
case BTSTAT_INVALID_CCB_OR_SG_PARAM:
panic("%s: Invalid CCB or SG list", bt_name(bt));
break;
case BTSTAT_AUTOSENSE_FAILED:
csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
break;
case BTSTAT_TAGGED_MSG_REJECTED:
{
struct ccb_trans_settings neg;
xpt_print_path(csio->ccb_h.path);
printf("refuses tagged commands. Performing "
"non-tagged I/O\n");
neg.flags = 0;
neg.valid = CCB_TRANS_TQ_VALID;
xpt_setup_ccb(&neg.ccb_h, csio->ccb_h.path,
/*priority*/1);
xpt_async(AC_TRANSFER_NEG, csio->ccb_h.path, &neg);
bt->tags_permitted &= ~(0x01 << csio->ccb_h.target_id);
csio->ccb_h.status = CAM_MSG_REJECT_REC;
break;
}
case BTSTAT_UNSUPPORTED_MSG_RECEIVED:
/*
* XXX You would think that this is
* a recoverable error... Hmmm.
*/
csio->ccb_h.status = CAM_REQ_CMP_ERR;
break;
case BTSTAT_HA_SOFTWARE_ERROR:
case BTSTAT_HA_WATCHDOG_ERROR:
case BTSTAT_HARDWARE_FAILURE:
/* Hardware reset ??? Can we recover ??? */
csio->ccb_h.status = CAM_NO_HBA;
break;
case BTSTAT_TARGET_IGNORED_ATN:
case BTSTAT_OTHER_SCSI_BUS_RESET:
case BTSTAT_HA_SCSI_BUS_RESET:
if ((csio->ccb_h.status & CAM_STATUS_MASK)
!= CAM_CMD_TIMEOUT)
csio->ccb_h.status = CAM_SCSI_BUS_RESET;
break;
case BTSTAT_HA_BDR:
if ((bccb->flags & BCCB_DEVICE_RESET) == 0)
csio->ccb_h.status = CAM_BDR_SENT;
else
csio->ccb_h.status = CAM_CMD_TIMEOUT;
break;
case BTSTAT_INVALID_RECONNECT:
case BTSTAT_ABORT_QUEUE_GENERATED:
csio->ccb_h.status = CAM_REQ_TERMIO;
break;
case BTSTAT_SCSI_PERROR_DETECTED:
csio->ccb_h.status = CAM_UNCOR_PARITY;
break;
}
if (csio->ccb_h.status != CAM_REQ_CMP) {
xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
csio->ccb_h.status |= CAM_DEV_QFRZN;
}
if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
btfreeccb(bt, bccb);
xpt_done(ccb);
break;
case BMBI_OK:
/* All completed without incident */
ccb->ccb_h.status |= CAM_REQ_CMP;
if ((bccb->flags & BCCB_RELEASE_SIMQ) != 0)
ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
btfreeccb(bt, bccb);
xpt_done(ccb);
break;
}
}
static int
btreset(struct bt_softc* bt, int hard_reset)
{
struct ccb_hdr *ccb_h;
u_int status;
u_int timeout;
u_int8_t reset_type;
if (hard_reset != 0)
reset_type = HARD_RESET;
else
reset_type = SOFT_RESET;
bt_outb(bt, CONTROL_REG, reset_type);
/* Wait 5sec. for Diagnostic start */
timeout = 5 * 10000;
while (--timeout) {
status = bt_inb(bt, STATUS_REG);
if ((status & DIAG_ACTIVE) != 0)
break;
DELAY(100);
}
if (timeout == 0) {
if (bootverbose)
printf("%s: btreset - Diagnostic Active failed to "
"assert. status = 0x%x\n", bt_name(bt), status);
return (ETIMEDOUT);
}
/* Wait 10sec. for Diagnostic end */
timeout = 10 * 10000;
while (--timeout) {
status = bt_inb(bt, STATUS_REG);
if ((status & DIAG_ACTIVE) == 0)
break;
DELAY(100);
}
if (timeout == 0) {
panic("%s: btreset - Diagnostic Active failed to drop. "
"status = 0x%x\n", bt_name(bt), status);
return (ETIMEDOUT);
}
/* Wait for the host adapter to become ready or report a failure */
timeout = 10000;
while (--timeout) {
status = bt_inb(bt, STATUS_REG);
if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
break;
DELAY(100);
}
if (timeout == 0) {
printf("%s: btreset - Host adapter failed to come ready. "
"status = 0x%x\n", bt_name(bt), status);
return (ETIMEDOUT);
}
/* If the diagnostics failed, tell the user */
if ((status & DIAG_FAIL) != 0
|| (status & HA_READY) == 0) {
printf("%s: btreset - Adapter failed diagnostics\n",
bt_name(bt));
if ((status & DATAIN_REG_READY) != 0)
printf("%s: btreset - Host Adapter Error code = 0x%x\n",
bt_name(bt), bt_inb(bt, DATAIN_REG));
return (ENXIO);
}
/* If we've allocated mailboxes, initialize them */
if (bt->init_level > 4)
btinitmboxes(bt);
/* If we've attached to the XPT, tell it about the event */
if (bt->path != NULL)
xpt_async(AC_BUS_RESET, bt->path, NULL);
/*
* Perform completion processing for all outstanding CCBs.
*/
while ((ccb_h = LIST_FIRST(&bt->pending_ccbs)) != NULL) {
struct bt_ccb *pending_bccb;
pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
pending_bccb->hccb.btstat = BTSTAT_HA_SCSI_BUS_RESET;
btdone(bt, pending_bccb, BMBI_ERROR);
}
return (0);
}
/*
* Send a command to the adapter.
*/
int
bt_cmd(struct bt_softc *bt, bt_op_t opcode, u_int8_t *params, u_int param_len,
u_int8_t *reply_data, u_int reply_len, u_int cmd_timeout)
{
u_int timeout;
u_int status;
u_int saved_status;
u_int intstat;
u_int reply_buf_size;
int s;
int cmd_complete;
int error;
/* No data returned to start */
reply_buf_size = reply_len;
reply_len = 0;
intstat = 0;
cmd_complete = 0;
saved_status = 0;
error = 0;
bt->command_cmp = 0;
/*
* Wait up to 10 sec. for the adapter to become
* ready to accept commands.
*/
timeout = 100000;
while (--timeout) {
status = bt_inb(bt, STATUS_REG);
if ((status & HA_READY) != 0
&& (status & CMD_REG_BUSY) == 0)
break;
/*
* Throw away any pending data which may be
* left over from earlier commands that we
* timedout on.
*/
if ((status & DATAIN_REG_READY) != 0)
(void)bt_inb(bt, DATAIN_REG);
DELAY(100);
}
if (timeout == 0) {
printf("%s: bt_cmd: Timeout waiting for adapter ready, "
"status = 0x%x\n", bt_name(bt), status);
return (ETIMEDOUT);
}
/*
* Send the opcode followed by any necessary parameter bytes.
*/
bt_outb(bt, COMMAND_REG, opcode);
/*
* Wait for up to 1sec for each byte of the the
* parameter list sent to be sent.
*/
timeout = 10000;
while (param_len && --timeout) {
DELAY(100);
s = splcam();
status = bt_inb(bt, STATUS_REG);
intstat = bt_inb(bt, INTSTAT_REG);
splx(s);
if ((intstat & (INTR_PENDING|CMD_COMPLETE))
== (INTR_PENDING|CMD_COMPLETE)) {
saved_status = status;
cmd_complete = 1;
break;
}
if (bt->command_cmp != 0) {
saved_status = bt->latched_status;
cmd_complete = 1;
break;
}
if ((status & DATAIN_REG_READY) != 0)
break;
if ((status & CMD_REG_BUSY) == 0) {
bt_outb(bt, COMMAND_REG, *params++);
param_len--;
timeout = 10000;
}
}
if (timeout == 0) {
printf("%s: bt_cmd: Timeout sending parameters, "
"status = 0x%x\n", bt_name(bt), status);
cmd_complete = 1;
saved_status = status;
error = ETIMEDOUT;
}
/*
* Wait for the command to complete.
*/
while (cmd_complete == 0 && --cmd_timeout) {
s = splcam();
status = bt_inb(bt, STATUS_REG);
intstat = bt_inb(bt, INTSTAT_REG);
/*
* It may be that this command was issued with
* controller interrupts disabled. We'll never
* get to our command if an incoming mailbox
* interrupt is pending, so take care of completed
* mailbox commands by calling our interrupt handler.
*/
if ((intstat & (INTR_PENDING|IMB_LOADED))
== (INTR_PENDING|IMB_LOADED))
bt_intr(bt);
splx(s);
if (bt->command_cmp != 0) {
/*
* Our interrupt handler saw CMD_COMPLETE
* status before we did.
*/
cmd_complete = 1;
saved_status = bt->latched_status;
} else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
== (INTR_PENDING|CMD_COMPLETE)) {
/*
* Our poll (in case interrupts are blocked)
* saw the CMD_COMPLETE interrupt.
*/
cmd_complete = 1;
saved_status = status;
} else if (opcode == BOP_MODIFY_IO_ADDR
&& (status & CMD_REG_BUSY) == 0) {
/*
* The BOP_MODIFY_IO_ADDR does not issue a CMD_COMPLETE,
* but it should update the status register. So, we
* consider this command complete when the CMD_REG_BUSY
* status clears.
*/
saved_status = status;
cmd_complete = 1;
} else if ((status & DATAIN_REG_READY) != 0) {
u_int8_t data;
data = bt_inb(bt, DATAIN_REG);
if (reply_len < reply_buf_size) {
*reply_data++ = data;
} else {
printf("%s: bt_cmd - Discarded reply data byte "
"for opcode 0x%x\n", bt_name(bt),
opcode);
}
/*
* Reset timeout to ensure at least a second
* between response bytes.
*/
cmd_timeout = MAX(cmd_timeout, 10000);
reply_len++;
} else if ((opcode == BOP_FETCH_LRAM)
&& (status & HA_READY) != 0) {
saved_status = status;
cmd_complete = 1;
}
DELAY(100);
}
if (cmd_timeout == 0) {
printf("%s: bt_cmd: Timeout waiting for command (%x) "
"to complete.\n%s: status = 0x%x, intstat = 0x%x, "
"rlen %d\n", bt_name(bt), opcode,
bt_name(bt), status, intstat, reply_len);
error = (ETIMEDOUT);
}
/*
* Clear any pending interrupts. Block interrupts so our
* interrupt handler is not re-entered.
*/
s = splcam();
bt_intr(bt);
splx(s);
if (error != 0)
return (error);
/*
* If the command was rejected by the controller, tell the caller.
*/
if ((saved_status & CMD_INVALID) != 0) {
/*
* Some early adapters may not recover properly from
* an invalid command. If it appears that the controller
* has wedged (i.e. status was not cleared by our interrupt
* reset above), perform a soft reset.
*/
if (bootverbose)
printf("%s: Invalid Command 0x%x\n", bt_name(bt),
opcode);
DELAY(1000);
status = bt_inb(bt, STATUS_REG);
if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
|| (status & (HA_READY|INIT_REQUIRED))
!= (HA_READY|INIT_REQUIRED)) {
btreset(bt, /*hard_reset*/FALSE);
}
return (EINVAL);
}
if (param_len > 0) {
/* The controller did not accept the full argument list */
return (E2BIG);
}
if (reply_len != reply_buf_size) {
/* Too much or too little data received */
return (EMSGSIZE);
}
/* We were successful */
return (0);
}
static int
btinitmboxes(struct bt_softc *bt) {
init_32b_mbox_params_t init_mbox;
int error;
bzero(bt->in_boxes, sizeof(bt_mbox_in_t) * bt->num_boxes);
bzero(bt->out_boxes, sizeof(bt_mbox_out_t) * bt->num_boxes);
bt->cur_inbox = bt->in_boxes;
bt->last_inbox = bt->in_boxes + bt->num_boxes - 1;
bt->cur_outbox = bt->out_boxes;
bt->last_outbox = bt->out_boxes + bt->num_boxes - 1;
/* Tell the adapter about them */
init_mbox.num_boxes = bt->num_boxes;
init_mbox.base_addr[0] = bt->mailbox_physbase & 0xFF;
init_mbox.base_addr[1] = (bt->mailbox_physbase >> 8) & 0xFF;
init_mbox.base_addr[2] = (bt->mailbox_physbase >> 16) & 0xFF;
init_mbox.base_addr[3] = (bt->mailbox_physbase >> 24) & 0xFF;
error = bt_cmd(bt, BOP_INITIALIZE_32BMBOX, (u_int8_t *)&init_mbox,
/*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
/*reply_len*/0, DEFAULT_CMD_TIMEOUT);
if (error != 0)
printf("btinitmboxes: Initialization command failed\n");
else if (bt->strict_rr != 0) {
/*
* If the controller supports
* strict round robin mode,
* enable it
*/
u_int8_t param;
param = 0;
error = bt_cmd(bt, BOP_ENABLE_STRICT_RR, &param, 1,
/*reply_buf*/NULL, /*reply_len*/0,
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
printf("btinitmboxes: Unable to enable strict RR\n");
error = 0;
} else if (bootverbose) {
printf("%s: Using Strict Round Robin Mailbox Mode\n",
bt_name(bt));
}
}
return (error);
}
/*
* Update the XPT's idea of the negotiated transfer
* parameters for a particular target.
*/
static void
btfetchtransinfo(struct bt_softc *bt, struct ccb_trans_settings* cts)
{
setup_data_t setup_info;
u_int target;
u_int targ_offset;
u_int targ_mask;
u_int sync_period;
int error;
u_int8_t param;
targ_syncinfo_t sync_info;
target = cts->ccb_h.target_id;
targ_offset = (target & 0x7);
targ_mask = (0x01 << targ_offset);
/*
* Inquire Setup Information. This command retreives the
* Wide negotiation status for recent adapters as well as
* the sync info for older models.
*/
param = sizeof(setup_info);
error = bt_cmd(bt, BOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
(u_int8_t*)&setup_info, sizeof(setup_info),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
printf("%s: btfetchtransinfo - Inquire Setup Info Failed %x\n",
bt_name(bt), error);
cts->valid = 0;
return;
}
sync_info = (target < 8) ? setup_info.low_syncinfo[targ_offset]
: setup_info.high_syncinfo[targ_offset];
if (sync_info.sync == 0)
cts->sync_offset = 0;
else
cts->sync_offset = sync_info.offset;
cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
if (strcmp(bt->firmware_ver, "5.06L") >= 0) {
u_int wide_active;
wide_active =
(target < 8) ? (setup_info.low_wide_active & targ_mask)
: (setup_info.high_wide_active & targ_mask);
if (wide_active)
cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
} else if ((bt->wide_permitted & targ_mask) != 0) {
struct ccb_getdev cgd;
/*
* Prior to rev 5.06L, wide status isn't provided,
* so we "guess" that wide transfers are in effect
* if the user settings allow for wide and the inquiry
* data for the device indicates that it can handle
* wide transfers.
*/
xpt_setup_ccb(&cgd.ccb_h, cts->ccb_h.path, /*priority*/1);
cgd.ccb_h.func_code = XPT_GDEV_TYPE;
xpt_action((union ccb *)&cgd);
if ((cgd.ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
&& (cgd.inq_data.flags & SID_WBus16) != 0)
cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
}
if (bt->firmware_ver[0] >= '3') {
/*
* For adapters that can do fast or ultra speeds,
* use the more exact Target Sync Information command.
*/
target_sync_info_data_t sync_info;
param = sizeof(sync_info);
error = bt_cmd(bt, BOP_TARG_SYNC_INFO, &param, /*paramlen*/1,
(u_int8_t*)&sync_info, sizeof(sync_info),
DEFAULT_CMD_TIMEOUT);
if (error != 0) {
printf("%s: btfetchtransinfo - Inquire Sync "
"Info Failed 0x%x\n", bt_name(bt), error);
cts->valid = 0;
return;
}
sync_period = sync_info.sync_rate[target] * 100;
} else {
sync_period = 2000 + (500 * sync_info.period);
}
/* Convert ns value to standard SCSI sync rate */
if (cts->sync_offset != 0)
cts->sync_period = scsi_calc_syncparam(sync_period);
else
cts->sync_period = 0;
cts->valid = CCB_TRANS_SYNC_RATE_VALID
| CCB_TRANS_SYNC_OFFSET_VALID
| CCB_TRANS_BUS_WIDTH_VALID;
xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
}
static void
btmapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct bt_softc* bt;
bt = (struct bt_softc*)arg;
bt->mailbox_physbase = segs->ds_addr;
}
static void
btmapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct bt_softc* bt;
bt = (struct bt_softc*)arg;
bt->bt_ccb_physbase = segs->ds_addr;
}
static void
btmapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct bt_softc* bt;
bt = (struct bt_softc*)arg;
SLIST_FIRST(&bt->sg_maps)->sg_physaddr = segs->ds_addr;
}
static void
btpoll(struct cam_sim *sim)
{
bt_intr(cam_sim_softc(sim));
}
void
bttimeout(void *arg)
{
struct bt_ccb *bccb;
union ccb *ccb;
struct bt_softc *bt;
int s;
bccb = (struct bt_ccb *)arg;
ccb = bccb->ccb;
bt = (struct bt_softc *)ccb->ccb_h.ccb_bt_ptr;
xpt_print_path(ccb->ccb_h.path);
printf("CCB %p - timed out\n", (void *)bccb);
s = splcam();
if ((bccb->flags & BCCB_ACTIVE) == 0) {
xpt_print_path(ccb->ccb_h.path);
printf("CCB %p - timed out CCB already completed\n",
(void *)bccb);
splx(s);
return;
}
/*
* In order to simplify the recovery process, we ask the XPT
* layer to halt the queue of new transactions and we traverse
* the list of pending CCBs and remove their timeouts. This
* means that the driver attempts to clear only one error
* condition at a time. In general, timeouts that occur
* close together are related anyway, so there is no benefit
* in attempting to handle errors in parrallel. Timeouts will
* be reinstated when the recovery process ends.
*/
if ((bccb->flags & BCCB_DEVICE_RESET) == 0) {
struct ccb_hdr *ccb_h;
if ((bccb->flags & BCCB_RELEASE_SIMQ) == 0) {
xpt_freeze_simq(bt->sim, /*count*/1);
bccb->flags |= BCCB_RELEASE_SIMQ;
}
ccb_h = LIST_FIRST(&bt->pending_ccbs);
while (ccb_h != NULL) {
struct bt_ccb *pending_bccb;
pending_bccb = (struct bt_ccb *)ccb_h->ccb_bccb_ptr;
untimeout(bttimeout, pending_bccb, ccb_h->timeout_ch);
ccb_h = LIST_NEXT(ccb_h, sim_links.le);
}
}
if ((bccb->flags & BCCB_DEVICE_RESET) != 0
|| bt->cur_outbox->action_code != BMBO_FREE
|| ((bccb->hccb.tag_enable == TRUE)
&& (bt->firmware_ver[0] < '5'))) {
/*
* Try a full host adapter/SCSI bus reset.
* We do this only if we have already attempted
* to clear the condition with a BDR, or we cannot
* attempt a BDR for lack of mailbox resources
* or because of faulty firmware. It turns out
* that firmware versions prior to 5.xx treat BDRs
* as untagged commands that cannot be sent until
* all outstanding tagged commands have been processed.
* This makes it somewhat difficult to use a BDR to
* clear up a problem with an uncompleted tagged command.
*/
ccb->ccb_h.status = CAM_CMD_TIMEOUT;
btreset(bt, /*hardreset*/TRUE);
printf("%s: No longer in timeout\n", bt_name(bt));
} else {
/*
* Send a Bus Device Reset message:
* The target that is holding up the bus may not
* be the same as the one that triggered this timeout
* (different commands have different timeout lengths),
* but we have no way of determining this from our
* timeout handler. Our strategy here is to queue a
* BDR message to the target of the timed out command.
* If this fails, we'll get another timeout 2 seconds
* later which will attempt a bus reset.
*/
bccb->flags |= BCCB_DEVICE_RESET;
ccb->ccb_h.timeout_ch =
timeout(bttimeout, (caddr_t)bccb, 2 * hz);
bt->recovery_bccb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
/* No Data Transfer */
bt->recovery_bccb->hccb.datain = TRUE;
bt->recovery_bccb->hccb.dataout = TRUE;
bt->recovery_bccb->hccb.btstat = 0;
bt->recovery_bccb->hccb.sdstat = 0;
bt->recovery_bccb->hccb.target_id = ccb->ccb_h.target_id;
/* Tell the adapter about this command */
bt->cur_outbox->ccb_addr = btccbvtop(bt, bt->recovery_bccb);
bt->cur_outbox->action_code = BMBO_START;
bt_outb(bt, COMMAND_REG, BOP_START_MBOX);
btnextoutbox(bt);
}
splx(s);
}
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