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freebsd/sys/dev/dpt/dpt_scsi.c
Julian Elischer b37c91fdc7 Add Simon Shapiro's DPT driver 
this shouldn't break anything existing.
Userland utilities to follow.
1998-01-26 06:11:18 +00:00

3701 lines
94 KiB
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/**
* Copyright (c) 1997 by Simon Shapiro
* 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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. 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.
*/
/**
* dpt_scsi.c: SCSI dependant code for the DPT driver
*
* credits: Assisted by Mike Neuffer in the early low level DPT code
* Thanx to Mark Salyzyn of DPT for his assistance.
* Special thanx to Justin Gibbs for invaluable help in
* making this driver look and work like a FreeBSD component.
* Last but not least, many thanx to UCB and the FreeBSD
* team for creating and maintaining such a wonderful O/S.
*
* TODO: * Add EISA and ISA probe code.
* * Add driver-level RSID-0. This will allow interoperability with
* NiceTry, M$-Doze, Win-Dog, Slowlaris, etc. in recognizing RAID
* arrays that span controllers (Wow!).
*/
/**
* IMPORTANT:
* There are two critical section "levels" used in this driver:
* splcam() and splsoftcam(). Splcam() protects us from re-entrancy
* from both our software and hardware interrupt handler. Splsoftcam()
* protects us only from our software interrupt handler. The two
* main data structures that need protection are the submitted and
* completed queue.
*
* There are three places where the submitted queue is accessed:
*
* 1. dpt_run_queue inserts into the queue
* 2. dpt_intr removes from the queue
* 3 dpt_handle_timeouts potentially removes from the queue.
*
* There are three places where the the completed queue is accessed:
* 1. dpt_intr() inserts into the queue
* 2. dpt_sintr() removes from the queue
* 3. dpt_handle_timeouts potentially inserts into the queue
*/
#ident "$Id: dpt_scsi.c,v 1.29 1998/01/21 04:32:08 ShimonR Exp $"
#define _DPT_C_
#include "opt_dpt.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/malloc.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/acct.h>
#include <sys/queue.h>
#include <machine/endian.h>
#include <machine/ipl.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_message.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_disk.h>
#include <machine/clock.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <sys/reboot.h>
#include <sys/dpt.h>
#ifdef INLINE
#undef INLINE
#endif
#define INLINE __inline
#define INLINE_Q
/* Function Prototypes */
static INLINE u_int32_t dpt_inl(dpt_softc_t * dpt, u_int32_t offset);
static INLINE u_int8_t dpt_inb(dpt_softc_t * dpt, u_int32_t offset);
static INLINE void
dpt_outb(dpt_softc_t * dpt, u_int32_t offset,
u_int8_t value);
static INLINE void
dpt_outl(dpt_softc_t * dpt, u_int32_t offset,
u_int32_t value);
static INLINE_Q void dpt_Qpush_free(dpt_softc_t * dpt, dpt_ccb_t * ccb);
static INLINE_Q dpt_ccb_t *dpt_Qpop_free(dpt_softc_t * dpt);
static INLINE_Q void dpt_Qadd_waiting(dpt_softc_t * dpt, dpt_ccb_t * ccb);
static INLINE_Q void dpt_Qpush_waiting(dpt_softc_t * dpt, dpt_ccb_t * ccb);
static INLINE_Q void
dpt_Qremove_waiting(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static INLINE_Q void
dpt_Qadd_submitted(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static INLINE_Q void
dpt_Qremove_submitted(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static INLINE_Q void
dpt_Qadd_completed(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static INLINE_Q void
dpt_Qremove_completed(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static int
dpt_send_eata_command(dpt_softc_t * dpt,
eata_ccb_t * cmd_block,
u_int8_t command,
int32_t retries,
u_int8_t ifc, u_int8_t code,
u_int8_t code2);
static INLINE int
dpt_send_immediate(dpt_softc_t * dpt,
eata_ccb_t * cmd_block,
u_int8_t ifc, u_int8_t code,
u_int8_t code2);
static INLINE int dpt_just_reset(dpt_softc_t * dpt);
static INLINE int dpt_raid_busy(dpt_softc_t * dpt);
static INLINE void dpt_sched_queue(dpt_softc_t * dpt);
#ifdef DPT_MEASURE_PERFORMANCE
static void
dpt_IObySize(dpt_softc_t * dpt, dpt_ccb_t * ccb,
int op, int index);
#endif
static void dpt_swi_register(void *);
#ifdef DPT_HANDLE_TIMEOUTS
static void dpt_handle_timeouts(dpt_softc_t * dpt);
static void dpt_timeout(void *dpt);
#endif
#ifdef DPT_LOST_IRQ
static void dpt_irq_timeout(void *dpt);
#endif
typedef struct scsi_inquiry_data s_inq_data_t;
static int
dpt_scatter_gather(dpt_softc_t * dpt, dpt_ccb_t * ccb,
u_int32_t data_length,
caddr_t data);
static int dpt_alloc_freelist(dpt_softc_t * dpt);
static void dpt_run_queue(dpt_softc_t * dpt, int requests);
static void dpt_complete(dpt_softc_t * dpt);
static int
dpt_process_completion(dpt_softc_t * dpt,
dpt_ccb_t * ccb);
static void
dpt_set_target(int redo, dpt_softc_t * dpt,
u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb);
static void
dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
dpt_ccb_t * ccb, int mode, u_int8_t command,
u_int16_t length, u_int16_t offset);
static void dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb);
static void dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb);
u_int8_t dpt_blinking_led(dpt_softc_t * dpt);
int
dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
caddr_t cmdarg, int minor_no);
void dpt_detect_cache(dpt_softc_t * dpt);
void dpt_shutdown(int howto, void *dpt);
void hex_dump(u_int8_t * data, int length, char *name, int no);
char *i2bin(unsigned int no, int length);
dpt_conf_t *
dpt_get_conf(dpt_softc_t * dpt, u_int8_t page, u_int8_t target,
u_int8_t size, int extent);
dpt_inq_t *dpt_get_board_data(dpt_softc_t * dpt, u_int32_t target_id);
int dpt_setup(dpt_softc_t * dpt, dpt_conf_t * conf);
int dpt_attach(dpt_softc_t * dpt);
int32_t dpt_scsi_cmd(struct scsi_xfer * xs);
void dptminphys(struct buf * bp);
void dpt_sintr(void);
void dpt_intr(void *arg);
char *scsi_cmd_name(u_int8_t cmd);
dpt_rb_t
dpt_register_buffer(int unit,
u_int8_t channel,
u_int8_t target,
u_int8_t lun,
u_int8_t mode,
u_int16_t length,
u_int16_t offset,
dpt_rec_buff callback,
dpt_rb_op_t op);
int
dpt_send_buffer(int unit,
u_int8_t channel,
u_int8_t target,
u_int8_t lun,
u_int8_t mode,
u_int16_t length,
u_int16_t offset,
void *data,
buff_wr_done callback);
extern void (*ihandlers[32]) __P((void));
u_long dpt_unit; /* This one is kernel-related, do not touch! */
/* The linked list of softc structures */
TAILQ_HEAD(, dpt_softc) dpt_softc_list = TAILQ_HEAD_INITIALIZER(dpt_softc_list);
/*
* These will have to be setup by parameters passed at boot/load time. For
* perfromance reasons, we make them constants for the time being.
*/
#define dpt_min_segs DPT_MAX_SEGS
#define dpt_max_segs DPT_MAX_SEGS
static struct scsi_adapter dpt_switch =
{
dpt_scsi_cmd,
dptminphys,
NULL,
NULL,
NULL,
"dpt",
{0, 0}
};
static struct scsi_device dpt_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"dpt",
0,
{0, 0}
};
/* Software Interrupt Vector */
static void
dpt_swi_register(void *unused)
{
ihandlers[SWI_CAMBIO] = dpt_sintr;
}
SYSINIT(dpt_camswi, SI_SUB_DRIVERS, SI_ORDER_FIRST, dpt_swi_register, NULL)
/* These functions allows us to do memory mapped I/O, if hardware supported. */
static INLINE u_int8_t
dpt_inb(dpt_softc_t * dpt, u_int32_t offset)
{
u_int8_t result;
if (dpt->v_membase != NULL) {
result = dpt->v_membase[offset];
} else {
result = inb(dpt->io_base + offset);
}
return (result);
}
static INLINE u_int32_t
dpt_inl(dpt_softc_t * dpt, u_int32_t offset)
{
u_int32_t result;
if (dpt->v_membase != NULL) {
result = *(volatile u_int32_t *) (&dpt->v_membase[offset]);
} else {
result = inl(dpt->io_base + offset);
}
return (result);
}
static INLINE void
dpt_outb(dpt_softc_t * dpt, u_int32_t offset, u_int8_t value)
{
if (dpt->v_membase != NULL) {
dpt->v_membase[offset] = value;
} else {
outb(dpt->io_base + offset, value);
}
}
static INLINE void
dpt_outl(dpt_softc_t * dpt, u_int32_t offset, u_int32_t value)
{
if (dpt->v_membase != NULL) {
*(volatile u_int32_t *) (&dpt->v_membase[offset]) = value;
} else {
outl(dpt->io_base + offset, value);
}
}
static INLINE void
dpt_sched_queue(dpt_softc_t * dpt)
{
if (dpt->state & DPT_HA_QUIET) {
printf("dpt%d: Under Quiet Busses Condition. "
"No Commands are submitted\n", dpt->unit);
return;
}
setsoftcambio();
}
static INLINE int
dpt_wait(dpt_softc_t * dpt, u_int8_t bits, u_int8_t state)
{
int i;
u_int8_t c;
for (i = 0; i < 20000; i++) { /* wait 20ms for not busy */
c = dpt_inb(dpt, HA_RSTATUS) & bits;
if (c == state)
return (0);
else
DELAY(50);
}
return (-1);
}
static INLINE int
dpt_just_reset(dpt_softc_t * dpt)
{
if ((dpt_inb(dpt, 2) == 'D')
&& (dpt_inb(dpt, 3) == 'P')
&& (dpt_inb(dpt, 4) == 'T')
&& (dpt_inb(dpt, 5) == 'H'))
return (1);
else
return (0);
}
static INLINE int
dpt_raid_busy(dpt_softc_t * dpt)
{
if ((dpt_inb(dpt, 0) == 'D')
&& (dpt_inb(dpt, 1) == 'P')
&& (dpt_inb(dpt, 2) == 'T'))
return (1);
else
return (0);
}
/**
* Build a Command Block for target mode READ/WRITE BUFFER,
* with the ``sync'' bit ON.
*
* Although the length and offset are 24 bit fields in the command, they cannot
* exceed 8192 bytes, so we take them as short integers andcheck their range.
* If they are sensless, we round them to zero offset, maximum length and complain.
*/
static void
dpt_target_ccb(dpt_softc_t * dpt, int bus, u_int8_t target, u_int8_t lun,
dpt_ccb_t * ccb, int mode, u_int8_t command,
u_int16_t length, u_int16_t offset)
{
eata_ccb_t *cp;
int ospl;
if ((length + offset) > DPT_MAX_TARGET_MODE_BUFFER_SIZE) {
printf("dpt%d: Length of %d, and offset of %d are wrong\n",
dpt->unit, length, offset);
length = DPT_MAX_TARGET_MODE_BUFFER_SIZE;
offset = 0;
}
ccb->xs = NULL;
ccb->flags = 0;
ccb->state = DPT_CCB_STATE_NEW;
ccb->std_callback = (ccb_callback) dpt_target_done;
ccb->wrbuff_callback = NULL;
cp = &ccb->eata_ccb;
cp->CP_OpCode = EATA_CMD_DMA_SEND_CP;
cp->SCSI_Reset = 0;
cp->HBA_Init = 0;
cp->Auto_Req_Sen = 1;
cp->cp_id = target;
cp->DataIn = 1;
cp->DataOut = 0;
cp->Interpret = 0;
cp->reqlen = htonl(sizeof(struct scsi_sense_data));
cp->cp_statDMA = htonl(vtophys(&cp->cp_statDMA));
cp->cp_reqDMA = htonl(vtophys(&cp->cp_reqDMA));
cp->cp_viraddr = (u_int32_t) & ccb;
cp->cp_msg[0] = HA_IDENTIFY_MSG | HA_DISCO_RECO;
cp->cp_scsi_cmd = command;
cp->cp_cdb[1] = (u_int8_t) (mode & SCSI_TM_MODE_MASK);
cp->cp_lun = lun; /* Order is important here! */
cp->cp_cdb[2] = 0x00; /* Buffer Id, only 1 :-( */
cp->cp_cdb[3] = (length >> 16) & 0xFF; /* Buffer offset MSB */
cp->cp_cdb[4] = (length >> 8) & 0xFF;
cp->cp_cdb[5] = length & 0xFF;
cp->cp_cdb[6] = (length >> 16) & 0xFF; /* Length MSB */
cp->cp_cdb[7] = (length >> 8) & 0xFF;
cp->cp_cdb[8] = length & 0xFF; /* Length LSB */
cp->cp_cdb[9] = 0; /* No sync, no match bits */
/**
* This could be optimized to live in dpt_register_buffer.
* We keep it here, just in case the kernel decides to reallocate pages
*/
if (dpt_scatter_gather(dpt, ccb, DPT_RW_BUFFER_SIZE,
dpt->rw_buffer[bus][target][lun])) {
printf("dpt%d: Failed to setup Scatter/Gather for Target-Mode buffer\n",
dpt->unit);
}
}
/* Setup a target mode READ command */
#define cmd_ct dpt->performance.command_count[(int)ccb->eata_ccb.cp_scsi_cmd];
static void
dpt_set_target(int redo, dpt_softc_t * dpt,
u_int8_t bus, u_int8_t target, u_int8_t lun, int mode,
u_int16_t length, u_int16_t offset, dpt_ccb_t * ccb)
{
int ospl;
#ifdef DPT_MEASURE_PERFORMANCE
struct timeval now;
#endif
if (dpt->target_mode_enabled) {
ospl = splcam();
if (!redo)
dpt_target_ccb(dpt, bus, target, lun, ccb, mode,
SCSI_TM_READ_BUFFER, length, offset);
ccb->transaction_id = ++dpt->commands_processed;
#ifdef DPT_MEASURE_PERFORMANCE
++cmd_ct;
microtime(&now);
ccb->command_started = now;
#endif
dpt_Qadd_waiting(dpt, ccb);
dpt_sched_queue(dpt);
splx(ospl);
} else {
printf("dpt%d: Target Mode Request, but Target Mode is OFF\n",
dpt->unit);
}
}
/**
* Schedule a buffer to be sent to another target.
* The work will be scheduled and the callback provided will be called when the work is
* actually done.
*
* Please NOTE: ``Anyone'' can send a buffer, but only registered clients get notified
of receipt of buffers.
*/
int
dpt_send_buffer(int unit,
u_int8_t channel,
u_int8_t target,
u_int8_t lun,
u_int8_t mode,
u_int16_t length,
u_int16_t offset,
void *data,
buff_wr_done callback)
{
dpt_softc_t *dpt;
dpt_ccb_t *ccb = NULL;
int ospl;
#ifdef DPT_MEASURE_PERFORMANCE
struct timeval now;
#endif
/* This is an external call. Be a bit paranoid */
for (dpt = TAILQ_FIRST(&dpt_softc_list);
dpt != NULL;
dpt = TAILQ_NEXT(dpt, links)) {
if (dpt->unit == unit)
goto valid_unit;
}
return (INVALID_UNIT);
valid_unit:
if (dpt->target_mode_enabled) {
if ((channel >= dpt->channels) || (target > dpt->max_id) ||
(lun > dpt->max_lun)) {
return (INVALID_SENDER);
}
if ((dpt->rw_buffer[channel][target][lun] == NULL) ||
(dpt->buffer_receiver[channel][target][lun] == NULL))
return (NOT_REGISTERED);
ospl = splsoftcam();
/* Process the free list */
if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
" Please try later\n",
dpt->unit);
splx(ospl);
return (NO_RESOURCES);
}
/* Now grab the newest CCB */
if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
splx(ospl);
panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
}
splx(ospl);
bcopy(dpt->rw_buffer[channel][target][lun] + offset, data, length);
dpt_target_ccb(dpt, channel, target, lun, ccb, mode, SCSI_TM_WRITE_BUFFER,
length, offset);
ccb->std_callback = (ccb_callback) callback; /* A hack. Potential
* trouble */
ospl = splcam();
ccb->transaction_id = ++dpt->commands_processed;
#ifdef DPT_MEASURE_PERFORMANCE
++cmd_ct;
microtime(&now);
ccb->command_started = now;
#endif
dpt_Qadd_waiting(dpt, ccb);
dpt_sched_queue(dpt);
splx(ospl);
return (0);
}
return (DRIVER_DOWN);
}
static void
dpt_target_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
{
int ospl = splsoftcam();
eata_ccb_t *cp;
cp = &ccb->eata_ccb;
/**
* Remove the CCB from the waiting queue.
* We do NOT put it back on the free, etc., queues as it is a special
* ccb, owned by the dpt_softc of this unit.
*/
ospl = splsoftcam();
dpt_Qremove_completed(dpt, ccb);
splx(ospl);
#define br_channel (ccb->eata_ccb.cp_channel)
#define br_target (ccb->eata_ccb.cp_id)
#define br_lun (ccb->eata_ccb.cp_LUN)
#define br_index [br_channel][br_target][br_lun]
#define read_buffer_callback (dpt->buffer_receiver br_index )
#define read_buffer (dpt->rw_buffer[br_channel][br_target][br_lun])
#define cb(offset) (ccb->eata_ccb.cp_cdb[offset])
#define br_offset ((cb(3) << 16) | (cb(4) << 8) | cb(5))
#define br_length ((cb(6) << 16) | (cb(7) << 8) | cb(8))
/* Different reasons for being here, you know... */
switch (ccb->eata_ccb.cp_scsi_cmd) {
case SCSI_TM_READ_BUFFER:
if (read_buffer_callback != NULL) {
/* This is a buffer generated by a kernel process */
read_buffer_callback(dpt->unit, br_channel,
br_target, br_lun,
read_buffer,
br_offset, br_length);
} else {
/*
* This is a buffer waited for by a user (sleeping)
* command
*/
wakeup(ccb);
}
/* We ALWAYS re-issue the same command; args are don't-care */
dpt_set_target(1, 0, 0, 0, 0, 0, 0, 0, 0);
break;
case SCSI_TM_WRITE_BUFFER:
(ccb->wrbuff_callback) (dpt->unit, br_channel, br_target,
br_offset, br_length,
br_lun, ccb->status_packet.hba_stat);
break;
default:
printf("dpt%d: %s is an unsupported command for target mode\n",
dpt->unit, scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd));
}
ospl = splsoftcam();
dpt->target_ccb[br_channel][br_target][br_lun] = NULL;
dpt_Qpush_free(dpt, ccb);
splx(ospl);
}
/**
* Use this function to register a client for a buffer read target operation.
* The function you register will be called every time a buffer is received
* by the target mode code.
*/
dpt_rb_t
dpt_register_buffer(int unit,
u_int8_t channel,
u_int8_t target,
u_int8_t lun,
u_int8_t mode,
u_int16_t length,
u_int16_t offset,
dpt_rec_buff callback,
dpt_rb_op_t op)
{
dpt_softc_t *dpt;
dpt_ccb_t *ccb = NULL;
int ospl;
for (dpt = TAILQ_FIRST(&dpt_softc_list);
dpt != NULL;
dpt = TAILQ_NEXT(dpt, links)) {
if (dpt->unit == unit)
goto valid_unit;
}
return (INVALID_UNIT);
valid_unit:
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
return (DRIVER_DOWN);
if ((channel > (dpt->channels - 1)) || (target > (dpt->max_id - 1)) ||
(lun > (dpt->max_lun - 1)))
return (INVALID_SENDER);
if (dpt->buffer_receiver[channel][target][lun] == NULL) {
if (op == REGISTER_BUFFER) {
/* Assign the requested callback */
dpt->buffer_receiver[channel][target][lun] = callback;
/* Get a CCB */
ospl = splsoftcam();
/* Process the free list */
if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
" Please try later\n",
dpt->unit);
splx(ospl);
return (NO_RESOURCES);
}
/* Now grab the newest CCB */
if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
splx(ospl);
panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
}
splx(ospl);
/* Clean up the leftover of the previous tenant */
ccb->status = DPT_CCB_STATE_NEW;
dpt->target_ccb[channel][target][lun] = ccb;
dpt->rw_buffer[channel][target][lun] = malloc(DPT_RW_BUFFER_SIZE,
M_DEVBUF, M_NOWAIT);
if (dpt->rw_buffer[channel][target][lun] == NULL) {
printf("dpt%d: Failed to allocate Target-Mode buffer\n",
dpt->unit);
ospl = splsoftcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
return (NO_RESOURCES);
}
dpt_set_target(0, dpt, channel, target, lun, mode, length, offset, ccb);
return (SUCCESSFULLY_REGISTERED);
} else
return (NOT_REGISTERED);
} else {
if (op == REGISTER_BUFFER) {
if (dpt->buffer_receiver[channel][target][lun] == callback)
return (ALREADY_REGISTERED);
else
return (REGISTERED_TO_ANOTHER);
} else {
if (dpt->buffer_receiver[channel][target][lun] == callback) {
dpt->buffer_receiver[channel][target][lun] = NULL;
ospl = splsoftcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
free(dpt->rw_buffer[channel][target][lun], M_DEVBUF);
return (SUCCESSFULLY_REGISTERED);
} else
return (INVALID_CALLBACK);
}
}
}
/**
* This routine will try to send an EATA command to the DPT HBA.
* It will, by default, try AHZ times, waiting 10ms between tries.
* It returns 0 on success and 1 on failure.
* It assumes the caller protects it with splbio() or some such.
*
* IMPORTANT: We do NOT protect the ports from multiple access in here.
* You are expected to do it in the calling routine.
* Here, we cannot have any clue as to the scope of your work.
*/
static int
dpt_send_eata_command(dpt_softc_t * dpt, eata_ccb_t * cmd_block,
u_int8_t command, int32_t retries,
u_int8_t ifc, u_int8_t code, u_int8_t code2)
{
int32_t loop;
u_int8_t result;
u_int32_t test;
u_int32_t swapped_cmdaddr;
if (!retries)
retries = 1000;
/*
* I hate this polling nonsense. Wish there was a way to tell the DPT
* to go get commands at its own pace, or to interrupt when ready.
* In the mean time we will measure how many itterations it really
* takes.
*/
for (loop = 0; loop < retries; loop++) {
if ((dpt_inb(dpt, HA_RAUXSTAT) & HA_ABUSY) == 0)
break;
else
DELAY(50);
}
if (loop < retries) {
#ifdef DPT_MEASURE_PERFORMANCE
if (loop > dpt->performance.max_eata_tries)
dpt->performance.max_eata_tries = loop;
if (loop < dpt->performance.min_eata_tries)
dpt->performance.min_eata_tries = loop;
#endif
} else {
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.command_too_busy;
#endif
return (1);
}
if (cmd_block != NULL) {
swapped_cmdaddr = vtophys(cmd_block);
#if (BYTE_ORDER == BIG_ENDIAN)
swapped_cmdaddr = ((swapped_cmdaddr >> 24) & 0xFF)
| ((swapped_cmdaddr >> 16) & 0xFF)
| ((swapped_cmdaddr >> 8) & 0xFF)
| (swapped_cmdaddr & 0xFF);
#endif
} else {
swapped_cmdaddr = 0;
}
/* And now the address */
dpt_outl(dpt, HA_WDMAADDR, swapped_cmdaddr);
if (command == EATA_CMD_IMMEDIATE) {
if (cmd_block == NULL) {
dpt_outb(dpt, HA_WCODE2, code2);
dpt_outb(dpt, HA_WCODE, code);
}
dpt_outb(dpt, HA_WIFC, ifc);
}
dpt_outb(dpt, HA_WCOMMAND, command);
return (0);
}
/**
* Send a command for immediate execution by the DPT
* See above function for IMPORTANT notes.
*/
static INLINE int
dpt_send_immediate(dpt_softc_t * dpt, eata_ccb_t * cmd_block,
u_int8_t ifc, u_int8_t code, u_int8_t code2)
{
return (dpt_send_eata_command(dpt, cmd_block, EATA_CMD_IMMEDIATE,
/* retries */ 1000000, ifc, code, code2));
}
/* Return the state of the blinking DPT LED's */
u_int8_t
dpt_blinking_led(dpt_softc_t * dpt)
{
int ndx;
int ospl;
u_int32_t state;
u_int32_t previous;
u_int8_t result;
ospl = splcam();
result = 0;
for (ndx = 0, state = 0, previous = 0;
(ndx < 10) && (state != previous);
ndx++) {
previous = state;
state = dpt_inl(dpt, 1);
}
if ((state == previous) && (state == DPT_BLINK_INDICATOR))
result = dpt_inb(dpt, 5);
splx(ospl);
return (result);
}
/**
* Execute a command which did not come from the kernel's SCSI layer.
* The only way to map user commands to bus and target is to comply with the
* standard DPT wire-down scheme:
*/
int
dpt_user_cmd(dpt_softc_t * dpt, eata_pt_t * user_cmd,
caddr_t cmdarg, int minor_no)
{
int channel, target, lun;
int huh;
int result;
int ospl;
int submitted;
dpt_ccb_t *ccb;
void *data;
struct timeval now;
data = NULL;
channel = minor2hba(minor_no);
target = minor2target(minor_no);
lun = minor2lun(minor_no);
if ((channel > (dpt->channels - 1))
|| (target > dpt->max_id)
|| (lun > dpt->max_lun))
return (ENXIO);
if (target == dpt->sc_scsi_link[channel].adapter_targ) {
/* This one is for the controller itself */
if ((user_cmd->eataID[0] != 'E')
|| (user_cmd->eataID[1] != 'A')
|| (user_cmd->eataID[2] != 'T')
|| (user_cmd->eataID[3] != 'A')) {
return (ENXIO);
}
}
/* Get a DPT CCB, so we can prepare a command */
ospl = splsoftcam();
/* Process the free list */
if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
" Please try later\n",
dpt->unit);
splx(ospl);
return (EFAULT);
}
/* Now grab the newest CCB */
if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
splx(ospl);
panic("dpt%d: Got a NULL CCB from pop_free()\n", dpt->unit);
} else {
splx(ospl);
/* Clean up the leftover of the previous tenant */
ccb->status = DPT_CCB_STATE_NEW;
}
bcopy((caddr_t) & user_cmd->command_packet, (caddr_t) & ccb->eata_ccb,
sizeof(eata_ccb_t));
/* We do not want to do user specified scatter/gather. Why?? */
if (ccb->eata_ccb.scatter == 1)
return (EINVAL);
ccb->eata_ccb.Auto_Req_Sen = 1;
ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
ccb->eata_ccb.cp_datalen = htonl(sizeof(ccb->eata_ccb.cp_datalen));
ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->eata_ccb.cp_dataDMA));
ccb->eata_ccb.cp_statDMA = htonl(vtophys(&ccb->eata_ccb.cp_statDMA));
ccb->eata_ccb.cp_reqDMA = htonl(vtophys(&ccb->eata_ccb.cp_reqDMA));
ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
if (ccb->eata_ccb.DataIn || ccb->eata_ccb.DataOut) {
/* Data I/O is involved in this command. Alocate buffer */
if (ccb->eata_ccb.cp_datalen > PAGE_SIZE) {
data = contigmalloc(ccb->eata_ccb.cp_datalen,
M_TEMP, M_WAITOK, 0, ~0,
ccb->eata_ccb.cp_datalen,
0x10000);
} else {
data = malloc(ccb->eata_ccb.cp_datalen, M_TEMP,
M_WAITOK);
}
if (data == NULL) {
printf("dpt%d: Cannot allocate %d bytes "
"for EATA command\n", dpt->unit,
ccb->eata_ccb.cp_datalen);
return (EFAULT);
}
#define usr_cmd_DMA (caddr_t)user_cmd->command_packet.cp_dataDMA
if (ccb->eata_ccb.DataIn == 1) {
if (copyin(usr_cmd_DMA,
data, ccb->eata_ccb.cp_datalen) == -1)
return (EFAULT);
}
} else {
/* No data I/O involved here. Make sure the DPT knows that */
ccb->eata_ccb.cp_datalen = 0;
data = NULL;
}
if (ccb->eata_ccb.FWNEST == 1)
ccb->eata_ccb.FWNEST = 0;
if (ccb->eata_ccb.cp_datalen != 0) {
if (dpt_scatter_gather(dpt, ccb, ccb->eata_ccb.cp_datalen,
data) != 0) {
if (data != NULL)
free(data, M_TEMP);
return (EFAULT);
}
}
/**
* We are required to quiet a SCSI bus.
* since we do not queue comands on a bus basis,
* we wait for ALL commands on a controller to complete.
* In the mean time, sched_queue() will not schedule new commands.
*/
if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
&& (ccb->eata_ccb.cp_cdb[2] == BUS_QUIET)) {
/* We wait for ALL traffic for this HBa to subside */
ospl = splsoftcam();
dpt->state |= DPT_HA_QUIET;
splx(ospl);
while ((submitted = dpt->submitted_ccbs_count) != 0) {
huh = tsleep((void *) dpt, PCATCH | PRIBIO, "dptqt",
100 * hz);
switch (huh) {
case 0:
/* Wakeup call received */
break;
case EWOULDBLOCK:
/* Timer Expired */
break;
default:
/* anything else */
break;
}
}
}
/* Resume normal operation */
if ((ccb->eata_ccb.cp_cdb[0] == MULTIFUNCTION_CMD)
&& (ccb->eata_ccb.cp_cdb[2] == BUS_UNQUIET)) {
ospl = splsoftcam();
dpt->state &= ~DPT_HA_QUIET;
splx(ospl);
}
/**
* Schedule the command and submit it.
* We bypass dpt_sched_queue, as it will block on DPT_HA_QUIET
*/
ccb->xs = NULL;
ccb->flags = 0;
ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
ccb->transaction_id = ++dpt->commands_processed;
ccb->std_callback = (ccb_callback) dpt_user_cmd_done;
ccb->result = (u_int32_t) & cmdarg;
ccb->data = data;
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.command_count[(int) ccb->eata_ccb.cp_scsi_cmd];
microtime(&now);
ccb->command_started = now;
#endif
ospl = splcam();
dpt_Qadd_waiting(dpt, ccb);
splx(ospl);
dpt_sched_queue(dpt);
/* Wait for the command to complete */
(void) tsleep((void *) ccb, PCATCH | PRIBIO, "dptucw", 100 * hz);
/* Free allocated memory */
if (data != NULL)
free(data, M_TEMP);
return (0);
}
static void
dpt_user_cmd_done(dpt_softc_t * dpt, int bus, dpt_ccb_t * ccb)
{
int ospl = splsoftcam();
u_int32_t result;
caddr_t cmd_arg;
/**
* If Auto Request Sense is on, copyout the sense struct
*/
#define usr_pckt_DMA (caddr_t)ntohl(ccb->eata_ccb.cp_reqDMA)
#define usr_pckt_len ntohl(ccb->eata_ccb.cp_datalen)
if (ccb->eata_ccb.Auto_Req_Sen == 1) {
if (copyout((caddr_t) & ccb->sense_data, usr_pckt_DMA,
sizeof(struct scsi_sense_data))) {
ccb->result = EFAULT;
dpt_Qpush_free(dpt, ccb);
splx(ospl);
wakeup(ccb);
return;
}
}
/* If DataIn is on, copyout the data */
if ((ccb->eata_ccb.DataIn == 1)
&& (ccb->status_packet.hba_stat == HA_NO_ERROR)) {
if (copyout(ccb->data, usr_pckt_DMA, usr_pckt_len)) {
dpt_Qpush_free(dpt, ccb);
ccb->result = EFAULT;
splx(ospl);
wakeup(ccb);
return;
}
}
/* Copyout the status */
result = ccb->status_packet.hba_stat;
cmd_arg = (caddr_t) ccb->result;
if (copyout((caddr_t) & result, cmd_arg, sizeof(result))) {
dpt_Qpush_free(dpt, ccb);
ccb->result = EFAULT;
splx(ospl);
wakeup(ccb);
return;
}
/* Put the CCB back in the freelist */
ccb->state |= DPT_CCB_STATE_COMPLETED;
dpt_Qpush_free(dpt, ccb);
/* Free allocated memory */
splx(ospl);
return;
}
/* Detect Cache parameters and size */
void
dpt_detect_cache(dpt_softc_t * dpt)
{
int size;
int bytes;
int result;
int ospl;
int ndx;
u_int8_t status;
char name[64];
char *param;
char *buff;
eata_ccb_t cp;
dpt_sp_t sp;
struct scsi_sense_data snp;
/**
* We lock out the hardware early, so that we can either complete the
* operation or bust out right away.
*/
sprintf(name, "FreeBSD DPT Driver, version %d.%d.%d",
DPT_RELEASE, DPT_VERSION, DPT_PATCH);
/**
* Default setting, for best perfromance..
* This is what virtually all cards default to..
*/
dpt->cache_type = DPT_CACHE_WRITEBACK;
dpt->cache_size = 0;
if ((buff = malloc(512, M_DEVBUF, M_NOWAIT)) == NULL) {
printf("dpt%d: Failed to allocate %d bytes for a work "
"buffer\n",
dpt->unit, 512);
return;
}
bzero(&cp, sizeof(eata_ccb_t));
bzero((int8_t *) & sp, sizeof(dpt_sp_t));
bzero((int8_t *) & snp, sizeof(struct scsi_sense_data));
bzero(buff, 512);
/* Setup the command structure */
cp.Interpret = 1;
cp.DataIn = 1;
cp.Auto_Req_Sen = 1;
cp.reqlen = (u_int8_t) sizeof(struct scsi_sense_data);
cp.cp_id = 0; /* who cares? The HBA will interpret.. */
cp.cp_LUN = 0; /* In the EATA packet */
cp.cp_lun = 0; /* In the SCSI command */
cp.cp_channel = 0;
cp.cp_scsi_cmd = EATA_CMD_DMA_SEND_CP;
cp.cp_len = 56;
cp.cp_dataDMA = htonl(vtophys(buff));
cp.cp_statDMA = htonl(vtophys(&sp));
cp.cp_reqDMA = htonl(vtophys(&snp));
cp.cp_identify = 1;
cp.cp_dispri = 1;
/**
* Build the EATA Command Packet structure
* for a Log Sense Command.
*/
cp.cp_cdb[0] = 0x4d;
cp.cp_cdb[1] = 0x0;
cp.cp_cdb[2] = 0x40 | 0x33;
cp.cp_cdb[7] = 1;
cp.cp_datalen = htonl(512);
ospl = splcam();
result = dpt_send_eata_command(dpt, &cp, EATA_CMD_DMA_SEND_CP,
10000, 0, 0, 0);
if (result != 0) {
printf("dpt%d WARNING: detect_cache() failed (%d) to send "
"EATA_CMD_DMA_SEND_CP\n", dpt->unit, result);
free(buff, M_TEMP);
splx(ospl);
return;
}
/* Wait for two seconds for a response. This can be slow... */
for (ndx = 0;
(ndx < 20000) &&
!((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
ndx++) {
DELAY(50);
}
/* Grab the status and clear interrupts */
status = dpt_inb(dpt, HA_RSTATUS);
splx(ospl);
/**
* Sanity check
*/
if (buff[0] != 0x33) {
return;
}
bytes = DPT_HCP_LENGTH(buff);
param = DPT_HCP_FIRST(buff);
if (DPT_HCP_CODE(param) != 1) {
/**
* DPT Log Page layout error
*/
printf("dpt%d: NOTICE: Log Page (1) layout error\n",
dpt->unit);
return;
}
if (!(param[4] & 0x4)) {
dpt->cache_type = DPT_NO_CACHE;
return;
}
while (DPT_HCP_CODE(param) != 6) {
param = DPT_HCP_NEXT(param);
if ((param < buff)
|| (param >= &buff[bytes])) {
return;
}
}
if (param[4] & 0x2) {
/**
* Cache disabled
*/
dpt->cache_type = DPT_NO_CACHE;
return;
}
if (param[4] & 0x4) {
dpt->cache_type = DPT_CACHE_WRITETHROUGH;
return;
}
dpt->cache_size = param[5]
| (param[6] < 8)
| (param[7] << 16)
| (param[8] << 24);
return;
}
/**
* Initializes the softc structure and allocate all sorts of storage.
* Returns 0 on good luck, 1-n otherwise (error condition sensitive).
*/
int
dpt_setup(dpt_softc_t * dpt, dpt_conf_t * conf)
{
dpt_inq_t *board_data;
u_long rev;
int ndx;
int ospl;
dpt_ccb_t *ccb;
board_data = dpt_get_board_data(dpt, conf->scsi_id0);
if (board_data == NULL) {
printf("dpt%d ERROR: Get_board_data() failure. "
"Setup ignored!\n", dpt->unit);
return (1);
}
dpt->total_ccbs_count = 0;
dpt->free_ccbs_count = 0;
dpt->waiting_ccbs_count = 0;
dpt->submitted_ccbs_count = 0;
dpt->completed_ccbs_count = 0;
switch (ntohl(conf->splen)) {
case DPT_EATA_REVA:
dpt->EATA_revision = 'a';
break;
case DPT_EATA_REVB:
dpt->EATA_revision = 'b';
break;
case DPT_EATA_REVC:
dpt->EATA_revision = 'c';
break;
case DPT_EATA_REVZ:
dpt->EATA_revision = 'z';
break;
default:
dpt->EATA_revision = '?';
}
(void) memcpy(&dpt->board_data, board_data, sizeof(dpt_inq_t));
dpt->bustype = IS_PCI; /* We only support and operate on PCI devices */
dpt->channels = conf->MAX_CHAN + 1;
dpt->max_id = conf->MAX_ID;
dpt->max_lun = conf->MAX_LUN;
dpt->state |= DPT_HA_OK;
if (conf->SECOND)
dpt->primary = FALSE;
else
dpt->primary = TRUE;
dpt->more_support = conf->MORE_support;
if (board_data == NULL) {
rev = ('?' << 24)
| ('-' << 16)
| ('?' << 8)
| '-';
} else {
/* Convert from network byte order to a "string" */
rev = (dpt->board_data.firmware[0] << 24)
| (dpt->board_data.firmware[1] << 16)
| (dpt->board_data.firmware[2] << 8)
| dpt->board_data.firmware[3];
}
if (rev >= (('0' << 24) + ('7' << 16) + ('G' << 8) + '0'))
dpt->immediate_support = 1;
else
dpt->immediate_support = 0;
dpt->broken_INQUIRY = FALSE;
for (ndx = 0; ndx < MAX_CHANNELS; ndx++)
dpt->resetlevel[ndx] = DPT_HA_OK;
dpt->cplen = ntohl(conf->cplen);
dpt->cppadlen = ntohs(conf->cppadlen);
dpt->queuesize = ntohs(conf->queuesiz);
dpt->hostid[0] = conf->scsi_id0;
dpt->hostid[1] = conf->scsi_id1;
dpt->hostid[2] = conf->scsi_id2;
if (conf->SG_64K) {
dpt->sgsize = SG_SIZE_BIG;
} else if ((ntohs(conf->SGsiz) < 1)
|| (ntohs(conf->SGsiz) > SG_SIZE)) {
/* Just a sanity check */
dpt->sgsize = SG_SIZE;
} else {
dpt->sgsize = ntohs(conf->SGsiz);
}
if (dpt->sgsize > dpt_max_segs)
dpt->sgsize = dpt_max_segs;
if (dpt_alloc_freelist(dpt) != 0) {
return (2);
}
/* Prepare for Target Mode */
ospl = splsoftcam();
dpt->target_mode_enabled = 1;
splx(ospl);
return (0);
}
/**
* The following function returns a pointer to a buffer which MUST be freed by
* The caller, a la free(result, M_DEVBUF)
*
* This function (and its like) assumes it is only running during system
* initialization!
*/
dpt_inq_t *
dpt_get_board_data(dpt_softc_t * dpt, u_int32_t target_id)
{
/* get_conf returns 512 bytes, most of which are zeros... */
return ((dpt_inq_t *) dpt_get_conf(dpt, 0, target_id,
sizeof(dpt_inq_t), 0));
}
/**
* The following function returns a pointer to a buffer which MUST be freed by
* the caller, a la ``free(result, M_TEMP);''
*/
dpt_conf_t *
dpt_get_conf(dpt_softc_t * dpt, u_int8_t page, u_int8_t target,
u_int8_t size, int extent)
{
dpt_sp_t sp;
eata_ccb_t cp;
/* Get_conf returns 512 bytes, most of which are zeros... */
dpt_conf_t *config;
u_short *ip;
u_int8_t status, sig1, sig2, sig3;
int ndx;
int ospl;
int result;
struct scsi_sense_data snp;
if ((config = (dpt_conf_t *) malloc(512, M_TEMP, M_WAITOK)) == NULL)
return (NULL);
bzero(&cp, sizeof(eata_ccb_t));
bzero((int8_t *) & sp, sizeof(dpt_sp_t));
bzero(config, size);
cp.Interpret = 1;
cp.DataIn = 1;
cp.Auto_Req_Sen = 1;
cp.reqlen = sizeof(struct scsi_sense_data);
cp.cp_id = target;
cp.cp_LUN = 0; /* In the EATA packet */
cp.cp_lun = 0; /* In the SCSI command */
cp.cp_scsi_cmd = INQUIRY;
cp.cp_len = size;
cp.cp_extent = extent;
cp.cp_page = page;
cp.cp_channel = 0; /* DNC, Interpret mode is set */
cp.cp_identify = 1;
cp.cp_datalen = htonl(size);
cp.cp_dataDMA = htonl(vtophys(config));
cp.cp_statDMA = htonl(vtophys(&sp));
cp.cp_reqDMA = htonl(vtophys(&snp));
cp.cp_viraddr = (u_int32_t) & cp;
ospl = splcam();
#ifdef DPT_RESET_BOARD
printf("dpt%d: get_conf() resetting HBA at %x.\n",
dpt->unit, BaseRegister(dpt));
dpt_outb(dpt, HA_WCOMMAND, EATA_CMD_RESET);
DELAY(750000);
#endif
/**
* This could be a simple for loop, but we suspected the compiler To
* have optimized it a bit too much. Wait for the controller to
* become ready
*/
while ((((status = dpt_inb(dpt, HA_RSTATUS)) != (HA_SREADY | HA_SSC))
&& (status != (HA_SREADY | HA_SSC | HA_SERROR))
&& /* This results from the `wd' probe at our
* addresses */
(status != (HA_SDRDY | HA_SERROR | HA_SDRQ)))
|| (dpt_wait(dpt, HA_SBUSY, 0))) {
/**
* RAID Drives still Spinning up? (This should only occur if
* the DPT controller is in a NON PC (PCI?) platform).
*/
if (dpt_raid_busy(dpt)) {
printf("dpt%d WARNING: Get_conf() RSUS failed for "
"HBA at %x\n", dpt->unit, BaseRegister(dpt));
free(config, M_TEMP);
splx(ospl);
return (NULL);
}
}
DptStat_Reset_BUSY(&sp);
/**
* XXXX We might want to do something more clever than aborting at
* this point, like resetting (rebooting) the controller and trying
* again.
*/
if ((result = dpt_send_eata_command(dpt, &cp, EATA_CMD_DMA_SEND_CP,
10000, 0, 0, 0)) != 0) {
printf("dpt%d WARNING: Get_conf() failed (%d) to send "
"EATA_CMD_DMA_READ_CONFIG\n",
dpt->unit, result);
free(config, M_TEMP);
splx(ospl);
return (NULL);
}
/* Wait for two seconds for a response. This can be slow */
for (ndx = 0;
(ndx < 20000)
&& !((status = dpt_inb(dpt, HA_RAUXSTAT)) & HA_AIRQ);
ndx++) {
DELAY(50);
}
/* Grab the status and clear interrupts */
status = dpt_inb(dpt, HA_RSTATUS);
splx(ospl);
/**
* Check the status carefully. Return only if the
* command was successful.
*/
if (((status & HA_SERROR) == 0)
&& (sp.hba_stat == 0)
&& (sp.scsi_stat == 0)
&& (sp.residue_len == 0)) {
return (config);
}
free(config, M_TEMP);
return (NULL);
}
/* This gets called once per SCSI bus defined in config! */
int
dpt_attach(dpt_softc_t * dpt)
{
struct scsibus_data *scbus;
int ndx;
int idx;
int channel;
int target;
int lun;
struct scsi_inquiry_data *inq;
for (ndx = 0; ndx < dpt->channels; ndx++) {
/**
* We do not setup target nor lun on the assumption that
* these are being set for individual devices that will be
* attached to the bus later.
*/
dpt->sc_scsi_link[ndx].adapter_unit = dpt->unit;
dpt->sc_scsi_link[ndx].adapter_targ = dpt->hostid[ndx];
dpt->sc_scsi_link[ndx].fordriver = 0;
dpt->sc_scsi_link[ndx].adapter_softc = dpt;
dpt->sc_scsi_link[ndx].adapter = &dpt_switch;
/*
* These appear to be the # of openings per that DEVICE, not
* the DPT!
*/
dpt->sc_scsi_link[ndx].opennings = dpt->queuesize;
dpt->sc_scsi_link[ndx].device = &dpt_dev;
dpt->sc_scsi_link[ndx].adapter_bus = ndx;
/**
* Prepare the scsibus_data area for the upperlevel scsi
* code.
*/
if ((scbus = scsi_alloc_bus()) == NULL)
return 0;
dpt->sc_scsi_link[ndx].scsibus = ndx;
scbus->maxtarg = dpt->max_id;
scbus->adapter_link = &dpt->sc_scsi_link[ndx];
/*
* Invite the SCSI control layer to probe the busses.
*/
dpt->handle_interrupts = 1; /* Now we are ready to work */
scsi_attachdevs(scbus);
scbus = (struct scsibus_data *) NULL;
}
return (1);
}
/**
* Allocate another chunk of CCB's. Return 0 on success, 1 otherwise.
* If the free list is empty, we allocate a block of entries and add them
* to the list. We obtain, at most, DPT_FREE_LIST_INCREMENT CCB's at a time.
* If we cannot, we will try fewer entries until we succeed.
* For every CCB, we allocate a maximal Scatter/Gather list.
* This routine also initializes all the static data that pertains to this CCB.
*/
/**
* XXX JGibbs - How big are your SG lists? Remeber that the kernel malloc
* uses buckets and mallocs in powers of two. So, if your
* SG list is not a power of two (up to PAGESIZE), you might
* waste a lot of memory. This was the reason the ahc driver
* allocats multiple SG lists at a time up to a PAGESIZE.
* Just something to keep in mind.
* YYY Simon - Up to 8192 entries, each entry is two ulongs, comes to 64K.
* In reality they are much smaller, so you are right.
*/
static int
dpt_alloc_freelist(dpt_softc_t * dpt)
{
dpt_ccb_t *nccbp;
dpt_sg_t *sg;
u_int8_t *buff;
int ospl;
int incr;
int ndx;
int ccb_count;
ccb_count = DPT_FREE_LIST_INCREMENT;
#ifdef DPT_RESTRICTED_FREELIST
if (dpt->total_ccbs_count != 0) {
printf("dpt%d: Restricted FreeList, No more than %d entries "
"allowed\n", dpt->unit, dpt->total_ccbs_count);
return (-1);
}
#endif
/**
* Allocate a group of dpt_ccb's. Work on the CCB's, one at a time
*/
ospl = splsoftcam();
for (ndx = 0; ndx < ccb_count; ndx++) {
size_t alloc_size;
dpt_sg_t *sgbuff;
alloc_size = sizeof(dpt_ccb_t); /* About 200 bytes */
if (alloc_size > PAGE_SIZE) {
/*
* Does not fit in a page. we try to fit in a
* contigious block of memory. If not, we will, later
* try to allocate smaller, and smaller chunks. There
* is a tradeof between memory and performance here.
* We know.this (crude) algorithm works well on
* machines with plenty of memory. We have seen it
* allocate in excess of 8MB.
*/
nccbp = (dpt_ccb_t *) contigmalloc(alloc_size,
M_DEVBUF, M_NOWAIT,
0, ~0,
PAGE_SIZE,
0x10000);
} else {
/* fits all in one page */
nccbp = (dpt_ccb_t *) malloc(alloc_size, M_DEVBUF,
M_NOWAIT);
}
if (nccbp == (dpt_ccb_t *) NULL) {
printf("dpt%d ERROR: Alloc_free_list() failed to "
"allocate %d\n",
dpt->unit, ndx);
splx(ospl);
return (-1);
}
alloc_size = sizeof(dpt_sg_t) * dpt->sgsize;
if (alloc_size > PAGE_SIZE) {
/* Does not fit in a page */
sgbuff = (dpt_sg_t *) contigmalloc(alloc_size,
M_DEVBUF, M_NOWAIT,
0, ~0,
PAGE_SIZE,
0x10000);
} else {
/* fits all in one page */
sgbuff = (dpt_sg_t *) malloc(alloc_size, M_DEVBUF,
M_NOWAIT);
}
/**
* If we cannot allocate sg lists, we do not want the entire
* list
*/
if (sgbuff == (dpt_sg_t *) NULL) {
free(nccbp, M_DEVBUF);
--ndx;
break;
}
/* Clean up the mailboxes */
bzero(sgbuff, alloc_size);
bzero(nccbp, sizeof(dpt_ccb_t));
/*
* this line is nullified by the one below.
* nccbp->eata_ccb.cp_dataDMA = (u_int32_t) sgbuff; Thanx,
* Mike!
*/
nccbp->sg_list = sgbuff;
/**
* Now that we have a new block of free CCB's, put them into
* the free list. We always add to the head of the list and
* always take form the head of the list (LIFO). Each ccb
* has its own Scatter/Gather list. They are all of the same
* size, Regardless of how much is used.
*
* While looping through all the new CCB's, we initialize them
* properly. These items NEVER change; They are mostly
* self-pointers, relative to the CCB itself.
*/
dpt_Qpush_free(dpt, nccbp);
++dpt->total_ccbs_count;
nccbp->eata_ccb.cp_dataDMA = htonl(vtophys(nccbp->sg_list));
nccbp->eata_ccb.cp_viraddr = (u_int32_t) nccbp; /* Unique */
nccbp->eata_ccb.cp_statDMA = htonl(vtophys(&dpt->sp));
/**
* See dpt_intr for why we make ALL CCB's ``have the same''
* Status Packet
*/
nccbp->eata_ccb.cp_reqDMA = htonl(vtophys(&nccbp->sense_data));
}
splx(ospl);
return (0);
}
/**
* Prepare the data area for DMA.
*/
static int
dpt_scatter_gather(dpt_softc_t * dpt, dpt_ccb_t * ccb, u_int32_t data_length,
caddr_t data)
{
int seg;
int thiskv;
int bytes_this_seg;
int bytes_this_page;
u_int32_t datalen;
vm_offset_t vaddr;
u_int32_t paddr;
u_int32_t nextpaddr;
dpt_sg_t *sg;
/* we start with Scatter/Gather OFF */
ccb->eata_ccb.scatter = 0;
if (data_length) {
if (ccb->flags & SCSI_DATA_IN) {
ccb->eata_ccb.DataIn = 1;
}
if (ccb->flags & SCSI_DATA_OUT) {
ccb->eata_ccb.DataOut = 1;
}
seg = 0;
datalen = data_length;
vaddr = (vm_offset_t) data;
paddr = vtophys(vaddr);
ccb->eata_ccb.cp_dataDMA = htonl(vtophys(ccb->sg_list));
sg = ccb->sg_list;
while ((datalen > 0) && (seg < dpt->sgsize)) {
/* put in the base address and length */
sg->seg_addr = paddr;
sg->seg_len = 0;
/* do it at least once */
nextpaddr = paddr;
while ((datalen > 0) && (paddr == nextpaddr)) {
u_int32_t size;
/**
* This page is contiguous (physically) with
* the the last, just extend the length
*/
/* how far to the end of the page */
nextpaddr = trunc_page(paddr) + PAGE_SIZE;
/* Compute the maximum size */
size = nextpaddr - paddr;
if (size > datalen)
size = datalen;
sg->seg_len += size;
vaddr += size;
datalen -= size;
if (datalen > 0)
paddr = vtophys(vaddr);
}
/* Next page isn't contiguous, finish the seg */
sg->seg_addr = htonl(sg->seg_addr);
sg->seg_len = htonl(sg->seg_len);
seg++;
sg++;
}
if (datalen) {
/* There's still data, must have run out of segs! */
printf("dpt%d: scsi_cmd() Too Many (%d) DMA segs "
"(%d bytes left)\n",
dpt->unit, dpt->sgsize, datalen);
return (1);
}
if (seg == 1) {
/**
* After going through all this trouble, we
* still have only one segment. As an
* optimization measure, we will do the
* I/O as a single, non-S/G operation.
*/
ccb->eata_ccb.cp_dataDMA = ccb->sg_list[0].seg_addr;
ccb->eata_ccb.cp_datalen = ccb->sg_list[0].seg_len;
} else {
/**
* There is more than one segment. Use S/G.
*/
ccb->eata_ccb.scatter = 1;
ccb->eata_ccb.cp_datalen =
htonl(seg * sizeof(dpt_sg_t));
}
} else { /* datalen == 0 */
/* No data xfer */
ccb->eata_ccb.cp_datalen = 0;
ccb->eata_ccb.cp_dataDMA = 0;
}
return (0);
}
/**
* This function obtains a CCB for a command and attempts to queue it to the
* Controller.
*
* CCB Obtaining: Is done by getting the first entry in the free list for the
* HBA. If we fail to get an scb, we send a TRY_LATER to the caller.
*
* XXX - JGibbs: XS_DRIVER_STUFFUP is equivalent to failing the I/O in the
* current SCSI layer.
*
* Command Queuing: Is done by putting the command at the end of the waiting
* queue. This assures fair chance for all commands to be processed.
* If the queue was empty (has only this, current command in it, we try to
* submit it to the HBA. Otherwise we return SUCCESSFULLY_QUEUED.
*/
int32_t
dpt_scsi_cmd(struct scsi_xfer * xs)
{
dpt_softc_t *dpt;
int incr;
int ndx;
int ospl;
int huh;
u_int32_t flags;
dpt_ccb_t *ccb;
u_int8_t status;
u_int32_t aux_status = 0; /* Initialized to shut GCC up */
int result;
int channel, target, lun;
struct scsi_inquiry_data *inq;
dpt = (dpt_softc_t *) xs->sc_link->adapter_softc;
flags = xs->flags;
channel = xs->sc_link->adapter_bus;
target = xs->sc_link->target;
lun = xs->sc_link->lun;
#ifdef DPT_HANDLE_TIMEOUTS
ospl = splsoftcam();
if ((dpt->state & DPT_HA_TIMEOUTS_SET) == 0) {
dpt->state |= DPT_HA_TIMEOUTS_SET;
timeout(dpt_timeout, dpt, hz * 10);
}
splx(ospl);
#endif
#ifdef DPT_LOST_IRQ
ospl = splcam();
if ((dpt->state & DPT_LOST_IRQ_SET) == 0) {
printf("dpt%d: Initializing Lost IRQ Timer\n", dpt->unit);
dpt->state |= DPT_LOST_IRQ_SET;
timeout(dpt_irq_timeout, dpt, hz);
}
splx(ospl);
#endif
/**
* Examine the command flags and handle properly. XXXX We are not
* handling external resets right now. Needs to be added. We do not
* care about the SCSI_NOSLEEP flag as we do not sleep here. We have
* to observe the SCSI_NOMASK flag, though.
*/
if (xs->flags & SCSI_RESET) {
printf("dpt%d: Unsupported option...\n"
" I refuse to Reset b%dt%du%d...!\n",
__FILE__, __LINE__, channel, target, lun);
xs->error = XS_DRIVER_STUFFUP;
return (COMPLETE);
}
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE) {
printf("dpt%d ERROR: Command \"%s\" recieved for b%dt%du%d\n"
" but controller is shutdown; Aborting...\n",
dpt->unit,
scsi_cmd_name(xs->cmd->opcode),
channel, target, lun);
xs->error = XS_DRIVER_STUFFUP;
return (COMPLETE);
}
if (flags & ITSDONE) {
printf("dpt%d WARNING: scsi_cmd(%s) already done on "
"b%dt%du%d?!\n",
dpt->unit, scsi_cmd_name(xs->cmd->opcode),
channel, target, lun);
xs->flags &= ~ITSDONE;
}
if (!(flags & INUSE)) {
printf("dpt%d WARNING: Unit not in use in scsi_cmd(%s) "
"on b%dt%du%d?!\n",
dpt->unit, scsi_cmd_name(xs->cmd->opcode), channel,
target, lun);
xs->flags |= INUSE;
}
/**
* We do not want to be disrupted when doing this, or another caller
* may do the same thing.
*/
ospl = splsoftcam();
/* Process the free list */
if ((TAILQ_EMPTY(&dpt->free_ccbs)) && dpt_alloc_freelist(dpt)) {
printf("dpt%d ERROR: Cannot allocate any more free CCB's.\n"
" Will try later\n",
dpt->unit);
xs->error = XS_DRIVER_STUFFUP;
splx(ospl);
return (COMPLETE);
}
/* Now grab the newest CCB */
if ((ccb = dpt_Qpop_free(dpt)) == NULL) {
/*
* No need to panic here. We can continue with only as many
* CCBs as we have.
*/
printf("dpt%d ERROR: Got a NULL CCB from pop_free()\n",
dpt->unit);
xs->error = XS_DRIVER_STUFFUP;
splx(ospl);
return (COMPLETE);
}
#ifdef DPT_HANDLE_TIMEOUTS
ccb->status &= ~(DPT_CCB_STATE_ABORTED | DPT_CCB_STATE_MARKED_LOST);
#endif
splx(ospl);
bcopy(xs->cmd, ccb->eata_ccb.cp_cdb, xs->cmdlen);
/* Put all the CCB population stuff below */
ccb->xs = xs;
ccb->flags = flags;
/* We NEVER reset the bus from a command */
ccb->eata_ccb.SCSI_Reset = 0;
/* We NEVER re-boot the HBA from a * command */
ccb->eata_ccb.HBA_Init = 0;
ccb->eata_ccb.Auto_Req_Sen = 1; /* We always want this feature */
ccb->eata_ccb.reqlen = htonl(sizeof(struct scsi_sense_data));
ccb->std_callback = NULL;
ccb->wrbuff_callback = NULL;
if (xs->sc_link->target == xs->sc_link->adapter_targ) {
ccb->eata_ccb.Interpret = 1;
} else {
ccb->eata_ccb.Interpret = 0;
}
ccb->eata_ccb.scatter = 0; /* S/G is OFF now */
ccb->eata_ccb.DataIn = 0;
ccb->eata_ccb.DataOut = 0;
/* At this time we do not deal with the RAID internals */
ccb->eata_ccb.FWNEST = 0;
ccb->eata_ccb.Phsunit = 0;
/* We do not do SMARTROM kind of things */
ccb->eata_ccb.I_AT = 0;
/* We do not inhibit the cache at this time */
ccb->eata_ccb.Disable_Cache = 0;
ccb->eata_ccb.cp_channel = channel;
ccb->eata_ccb.cp_id = target;
ccb->eata_ccb.cp_LUN = lun; /**
* In the EATA packet. We do not
* change the SCSI command yet
*/
/* We are currently dealing with target LUN's, not ROUTINEs */
ccb->eata_ccb.cp_luntar = 0;
/**
* XXXX - We grant the target disconnect prvileges, except in polled
* mode (????).
*/
if ((ccb->flags & SCSI_NOMASK) || !dpt->handle_interrupts) {
ccb->eata_ccb.cp_dispri = 0;
} else {
ccb->eata_ccb.cp_dispri = 1;
}
/* we always ask for Identify */
ccb->eata_ccb.cp_identify = 1;
/**
* These three are used for command queues and tags. How do we use
* them?
*
* XXX - JGibbs: Most likely like so: ccb->eata_ccb.cp_msg[0] =
* MSG_SIMPLEQ_TAG; ccb->eata_ccb.cp_msg[1] = tagid;
* ccb->eata_ccb.cp_msg[2] = 0;
*
* YYY - Shimon: Thanx! We still do not do that as the current
* firmware does it automatically, including on RAID arrays.
*/
ccb->eata_ccb.cp_msg[0] = 0;
ccb->eata_ccb.cp_msg[1] = 0;
ccb->eata_ccb.cp_msg[2] = 0;
/* End of CCB population */
if (dpt_scatter_gather(dpt, ccb, xs->datalen, xs->data) != 0) {
xs->error = XS_DRIVER_STUFFUP;
ospl = splsoftcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
return (COMPLETE);
}
xs->resid = 0;
xs->status = 0;
/**
* This is the polled mode section. If we are here to honor
* SCSI_NOMASK, during scsi_attachdevs(), please notice that
* interrupts are ENABLED in the system (2.2.1) and that the DPT
* WILL generate them, unless we turn them off!
*/
/**
* XXX - JGibbs: Polled mode was a botch at best. It's nice to
* know that it goes completely away with the CAM code.
* YYY - Simon: Take it out once the rest is stable. Be careful about
* how you wait for commands to complete when you switch
* to interrupt mode in the scanning code (initiated by
* scsi_attachdevs).
* Disabling it in 2.2 causes a hung system.
*/
if ((ccb->flags & SCSI_NOMASK) || !dpt->handle_interrupts) {
/**
* This is an ``immediate'' command. Poll it! We poll by
* partially bypassing the queues. We first submit the
* command by asking dpt_run_queue() to queue it. Then we
* poll its status packet, until it completes. Then we give
* it to dpt_process_completion() to analyze and then we
* return.
*/
/*
* Increase the number of commands queueable for a device. We
* force each device to the maximum allowed for its HBA. This
* appears wrong but all it will do is cause excessive
* commands to sit in our queue. On the other hand, we can
* burst as many commands as the DPT can take for a single
* device. We do it here, so only while in polled mode (early
* boot) do we waste time on it. We have no clean way
* to overrule sdattach() zeal in depressing the opennings
* back to one if it is more than 1.
*/
if (xs->sc_link->opennings < dpt->queuesize) {
xs->sc_link->opennings = dpt->queuesize;
}
/**
* This test only protects us from submitting polled
* commands during Non-polled times. We assumed polled
* commands go in serially, one at a time. BTW, we have NOT
* checked, nor verified the scope of the disaster that WILL
* follow going into polled mode after being in interrupt
* mode for any length of time.
*/
if (dpt->submitted_ccbs_count < dpt->queuesize) {
/**
* Submit the request to the DPT. Unfortunately, ALL
* this must be done as an atomic operation :-(
*/
ccb->eata_ccb.cp_viraddr = (u_int32_t) & ccb;
#define dpt_SP htonl(vtophys(&ccb->status_packet))
#define dpt_sense htonl(vtophys(&ccb->sense_data))
ccb->eata_ccb.cp_statDMA = dpt_SP;
ccb->eata_ccb.cp_reqDMA = dpt_sense;
/* Try to queue a command */
ospl = splcam();
result = dpt_send_eata_command(dpt, &ccb->eata_ccb,
EATA_CMD_DMA_SEND_CP,
0, 0, 0, 0);
if (result != 0) {
dpt_Qpush_free(dpt, ccb);
xs->error = XS_DRIVER_STUFFUP;
splx(ospl);
return (COMPLETE);
}
} else {
xs->error = XS_DRIVER_STUFFUP;
dpt_Qpush_free(dpt, ccb);
splx(ospl);
return (COMPLETE);
}
for (ndx = 0;
(ndx < xs->timeout)
&& !((aux_status = dpt_inb(dpt, HA_RAUXSTAT))
& HA_AIRQ);
ndx++) {
DELAY(50);
}
/**
* Get the status and clear the interrupt flag on the
* controller
*/
status = dpt_inb(dpt, HA_RSTATUS);
splx(ospl);
ccb->status_reg = status;
ccb->aux_status_reg = aux_status;
/* This will setup the xs flags */
dpt_process_completion(dpt, ccb);
if (status & HA_SERROR) {
ospl = splsoftcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
return (COMPLETE);
}
ospl = splsoftcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
return (COMPLETE);
} else {
struct timeval junk;
/**
* Not a polled command.
* The command can be queued normally.
* We start a critical section PRIOR to submitting to the DPT,
* and end it AFTER it moves to the submitted queue.
* If not, we cal (and will!) be hit with a completion
* interrupt while the command is in suspense between states.
*/
ospl = splsoftcam();
ccb->transaction_id = ++dpt->commands_processed;
#ifdef DPT_MEASURE_PERFORMANCE
#define cmd_ndx (int)ccb->eata_ccb.cp_scsi_cmd
++dpt->performance.command_count[cmd_ndx];
microtime(&junk);
ccb->command_started = junk;
#endif
dpt_Qadd_waiting(dpt, ccb);
splx(ospl);
dpt_sched_queue(dpt);
}
return (SUCCESSFULLY_QUEUED);
}
/**
* This function returns the transfer size in bytes,
* as a function of the maximum number of Scatter/Gather
* segments. It should do so for a given HBA, but right now it returns
* dpt_min_segs, which is the SMALLEST number, from the ``weakest'' HBA found.
*/
void
dptminphys(struct buf * bp)
{
/**
* This IS a performance sensitive routine.
* It gets called at least once per I/O. Sometimes more
*/
if (dpt_min_segs == 0) {
panic("DPT: Minphys without attach!\n");
}
if (bp->b_bcount > ((dpt_min_segs - 1) * PAGE_SIZE)) {
#ifdef DPT_DEBUG_MINPHYS
printf("DPT: Block size of %x is larger than %x. Truncating\n",
bp->b_bcount, ((dpt_min_segs - 1) * PAGE_SIZE));
#endif
bp->b_bcount = ((dpt_min_segs - 1) * PAGE_SIZE);
}
}
/*
* This function goes to the waiting queue, peels off a request, gives it to
* the DPT HBA and returns. It takes care of some housekeeping details first.
* The requests argument tells us how many requests to try and send to the
* DPT. A requests = 0 will attempt to send as many as the controller can
* take.
*/
static void
dpt_run_queue(dpt_softc_t * dpt, int requests)
{
int req;
int ospl;
int ndx;
int result;
u_int8_t status, aux_status;
eata_ccb_t *ccb;
dpt_ccb_t *dccb;
if (TAILQ_EMPTY(&dpt->waiting_ccbs)) {
return; /* Nothing to do if the list is empty */
}
if (!requests)
requests = dpt->queuesize;
/* Main work loop */
for (req = 0; (req < requests) && dpt->waiting_ccbs_count
&& (dpt->submitted_ccbs_count < dpt->queuesize); req++) {
/**
* Move the request from the waiting list to the submitted
* list, and submit to the DPT.
* We enter a critical section BEFORE even looking at the
* queue, and exit it AFTER the ccb has moved to a
* destination queue.
* This is normally the submitted queue but can be the waiting
* queue again, if pushing the command into the DPT failed.
*/
ospl = splsoftcam();
dccb = TAILQ_FIRST(&dpt->waiting_ccbs);
if (dccb == NULL) {
/* We have yet to see one report of this condition */
panic("dpt%d ERROR: Race condition in run_queue "
"(w%ds%d)\n",
dpt->unit, dpt->waiting_ccbs_count,
dpt->submitted_ccbs_count);
splx(ospl);
return;
}
dpt_Qremove_waiting(dpt, dccb);
splx(ospl);
/**
* Assign exact values here. We manipulate these values
* indirectly elsewhere, so BE CAREFUL!
*/
dccb->eata_ccb.cp_viraddr = (u_int32_t) dccb;
dccb->eata_ccb.cp_statDMA = htonl(vtophys(&dpt->sp));
dccb->eata_ccb.cp_reqDMA = htonl(vtophys(&dccb->sense_data));
if (dccb->xs != NULL)
bzero(&dccb->xs->sense, sizeof(struct scsi_sense_data));
/* Try to queue a command */
ospl = splcam();
if ((result = dpt_send_eata_command(dpt, &dccb->eata_ccb,
EATA_CMD_DMA_SEND_CP, 0,
0, 0, 0)) != 0) {
dpt_Qpush_waiting(dpt, dccb);
splx(ospl);
return;
}
dpt_Qadd_submitted(dpt, dccb);
splx(ospl);
}
}
/**
* This is the interrupt handler for the DPT driver.
* This routine runs at splcam (or whatever was configured for this device).
*/
void
dpt_intr(void *arg)
{
dpt_softc_t *dpt;
dpt_softc_t *ldpt;
u_int8_t status, aux_status;
dpt_ccb_t *dccb;
dpt_ccb_t *tccb;
eata_ccb_t *ccb;
dpt = (dpt_softc_t *) arg;
#ifdef DPT_INTR_DELAY
DELAY(DPT_INTR_DELAY);
#endif
#ifdef DPT_MEASURE_PERFORMANCE
{
struct timeval junk;
microtime(&junk);
dpt->performance.intr_started = junk;
}
#endif
/* First order of business is to check if this interrupt is for us */
aux_status = dpt_inb(dpt, HA_RAUXSTAT);
if (!(aux_status & HA_AIRQ)) {
#ifdef DPT_LOST_IRQ
if (dpt->state & DPT_LOST_IRQ_ACTIVE) {
dpt->state &= ~DPT_LOST_IRQ_ACTIVE;
return;
}
#endif
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.spurious_interrupts;
#endif
return;
}
if (!dpt->handle_interrupts) {
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.aborted_interrupts;
#endif
status = dpt_inb(dpt, HA_RSTATUS); /* This CLEARS
* interrupts */
return;
}
/**
* What we want to do now, is to capture the status, all of it, move
* it where it belongs, wake up whoever sleeps waiting to process
* this result, and get out of here.
*/
dccb = dpt->sp.ccb; /**
* There is a very SERIOUS and dangerous
* assumption here. We assume that EVERY
* interrupt is in response to some request we
* put to the DPT. IOW, we assume that the
* Virtual Address of CP always has a valid
* pointer that we put in! How will the DPT
* behave if it is in Target mode? How does it
* (and our driver) know it switches from
* Initiator to target? What will the SP be
* when a target mode interrupt is received?
*/
#ifdef DPT_VERIFY_HINTR
dpt->sp.ccb = (dpt_ccb_t *) 0x55555555;
#else
dpt->sp.ccb = (dpt_ccb_t *) NULL;
#endif
#ifdef DPT_HANDLE_TIMEOUTS
if (dccb->state & DPT_CCB_STATE_MARKED_LOST) {
struct timeval now;
u_int32_t age;
struct scsi_xfer *xs = dccb->xs;
microtime(&now);
age = dpt_time_delta(dccb->command_started, now);
printf("dpt%d: Salvaging Tx %d from the jaws of destruction "
"(%d/%d)\n",
dpt->unit, dccb->transaction_id, xs->timeout, age);
dccb->state |= DPT_CCB_STATE_MARKED_SALVAGED;
dccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
}
#endif
/* Ignore status packets with EOC not set */
if (dpt->sp.EOC == 0) {
printf("dpt%d ERROR: Request %d recieved with clear EOC.\n"
" Marking as LOST.\n",
dpt->unit, dccb->transaction_id);
#ifdef DPT_VERIFY_HINTR
dpt->sp.ccb = (dpt_sp_t *) 0x55555555;
#else
dpt->sp.ccb = (dpt_sp_t *) NULL;
#endif
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.aborted_interrupts;
#endif
#ifdef DPT_HANDLE_TIMEOUTS
dccb->state |= DPT_CCB_STATE_MARKED_LOST;
#endif
/* This CLEARS the interrupt! */
status = dpt_inb(dpt, HA_RSTATUS);
return;
}
dpt->sp.EOC = 0;
#ifdef DPT_VERIFY_HINTR
/*
* Make SURE the next caller is legitimate. If they are not, we will
* find 0x55555555 here. We see 0x000000 or 0xffffffff when the PCi
* bus has DMA troubles (as when behing a PCI-PCI * bridge .
*/
if ((dccb == NULL)
|| (dccb == (dpt_ccb_t *) ~ 0)
|| (dccb == (dpt_ccb_t *) 0x55555555)) {
printf("dpt%d: BAD (%x) CCB in SP (AUX status = %s).\n",
dpt->unit, dccb, i2bin((unsigned long) aux_status,
sizeof(aux_status) * 8));
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.aborted_interrupts;
#endif
/* This CLEARS the interrupt! */
status = dpt_inb(dpt, HA_RSTATUS);
return;
}
for (tccb = TAILQ_FIRST(&dpt->submitted_ccbs);
(tccb != NULL) && (tccb != dccb);
tccb = TAILQ_NEXT(tccb, links));
if (tccb == NULL) {
printf("dpt%d: %x is not in the SUBMITTED queue\n",
dpt->unit, dccb);
for (tccb = TAILQ_FIRST(&dpt->completed_ccbs);
(tccb != NULL) && (tccb != dccb);
tccb = TAILQ_NEXT(tccb, links));
if (tccb != NULL)
printf("dpt%d: %x is in the COMPLETED queue\n",
dpt->unit, dccb);
for (tccb = TAILQ_FIRST(&dpt->waiting_ccbs);
(tccb != NULL) && (tccb != dccb);
tccb = TAILQ_NEXT(tccb, links));
if (tccb != NULL)
printf("dpt%d: %x is in the WAITING queue\n",
dpt->unit, dccb);
for (tccb = TAILQ_FIRST(&dpt->free_ccbs);
(tccb != NULL) && (tccb != dccb);
tccb = TAILQ_NEXT(tccb, links));
if (tccb != NULL)
printf("dpt%d: %x is in the FREE queue\n",
dpt->unit, dccb);
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.aborted_interrupts;
#endif
/* This CLEARS the interrupt! */
status = dpt_inb(dpt, HA_RSTATUS);
return;
}
#endif /* DPT_VERIFY_HINTR */
/**
* Copy the status packet from the general area to the dpt_ccb.
* According to Mark Salyzyn, we only need few pieces of it.
* Originally we had:
* bcopy((void *) &dpt->sp, (void *) &dccb->status_packet,
* sizeof(dpt_sp_t));
*/
dccb->status_packet.hba_stat = dpt->sp.hba_stat;
dccb->status_packet.scsi_stat = dpt->sp.scsi_stat;
dccb->status_packet.residue_len = dpt->sp.residue_len;
/* Make sure the EOC bit is OFF! */
dpt->sp.EOC = 0;
/* Clear interrupts, check for error */
if ((status = dpt_inb(dpt, HA_RSTATUS)) & HA_SERROR) {
/**
* Error Condition. Check for magic cookie. Exit this test
* on earliest sign of non-reset condition
*/
/* Check that this is not a board reset interrupt */
if (dpt_just_reset(dpt)) {
printf("dpt%d: HBA rebooted.\n"
" All transactions should be "
"resubmitted\n",
dpt->unit);
printf("dpt%d: >>---->> This is incomplete, fix me"
".... <<----<<",
dpt->unit);
printf(" Incomplete Code; Re-queue the lost "
"commands\n",
dpt->unit);
Debugger("DPT Rebooted");
#ifdef DPT_MEASURE_PERFORMANCE
++dpt->performance.aborted_interrupts;
#endif
return;
}
}
dccb->status_reg = status;
dccb->aux_status_reg = aux_status;
/* Mark BOTH queues as busy */
dpt->queue_status |= (DPT_SUBMITTED_QUEUE_ACTIVE
| DPT_COMPLETED_QUEUE_ACTIVE);
dpt_Qremove_submitted(dpt, dccb);
dpt_Qadd_completed(dpt, dccb);
dpt->queue_status &= ~(DPT_SUBMITTED_QUEUE_ACTIVE
| DPT_COMPLETED_QUEUE_ACTIVE);
dpt_sched_queue(dpt);
#ifdef DPT_MEASURE_PERFORMANCE
{
u_int32_t result;
struct timeval junk;
microtime(&junk);
result = dpt_time_delta(dpt->performance.intr_started, junk);
if (result != ~0) {
if (dpt->performance.max_intr_time < result)
dpt->performance.max_intr_time = result;
if (result < dpt->performance.min_intr_time) {
dpt->performance.min_intr_time = result;
}
}
}
#endif
}
/*
* This function is the DPT_ISR Software Interrupt Service Routine. When the
* DPT completes a SCSI command, it puts the results in a Status Packet, sets
* up two 1-byte registers and generates an interrupt. We catch this
* interrupt in dpt_intr and copy the whole status to the proper CCB. Once
* this is done, we generate a software interrupt that calls this routine.
* The routine then scans ALL the complete queues of all the DPT HBA's and
* processes ALL the commands that are in the queue.
*
* XXXX REMEMBER: We always scan ALL the queues of all the HBA's. Always
* starting with the first controller registered (dpt0). This creates
* an ``unfair'' opportunity for the first controllers in being served.
* Careful instrumentation may prove a need to change this policy.
*
* This command rns at splSOFTcam. Remember that.
*/
void
dpt_sintr(void)
{
dpt_softc_t *dpt;
int ospl;
/* Find which DPT needs help */
for (dpt = TAILQ_FIRST(&dpt_softc_list);
dpt != NULL;
dpt = TAILQ_NEXT(dpt, links)) {
/*
* Drain the completed queue, to make room for new, " waiting
* requests. We change to splcam to block interrupts from
* mucking with " the completed queue
*/
ospl = splcam();
if (dpt->queue_status & DPT_SINTR_ACTIVE) {
splx(ospl);
continue;
}
dpt->queue_status |= DPT_SINTR_ACTIVE;
if (!TAILQ_EMPTY(&dpt->completed_ccbs)) {
splx(ospl);
dpt_complete(dpt);
ospl = splcam();
}
/* Submit as many waiting requests as the DPT can take */
if (!TAILQ_EMPTY(&dpt->waiting_ccbs)) {
dpt_run_queue(dpt, 0);
}
dpt->queue_status &= ~DPT_SINTR_ACTIVE;
splx(ospl);
}
}
/**
* Scan the complete queue for a given controller and process ALL the completed
* commands in the queue.
*/
static void
dpt_complete(dpt_softc_t * dpt)
{
dpt_ccb_t *ccb;
int ospl;
ospl = splcam();
if (dpt->queue_status & DPT_COMPLETED_QUEUE_ACTIVE) {
splx(ospl);
return;
}
dpt->queue_status |= DPT_COMPLETED_QUEUE_ACTIVE;
while ((ccb = TAILQ_FIRST(&dpt->completed_ccbs)) != NULL) {
struct scsi_xfer *xs;
dpt_Qremove_completed(dpt, ccb);
splx(ospl);
/* Process this completed request */
if (dpt_process_completion(dpt, ccb) == 0) {
xs = ccb->xs;
if (ccb->std_callback != NULL) {
(ccb->std_callback) (dpt, ccb->eata_ccb.cp_channel,
ccb);
} else {
ospl = splcam();
dpt_Qpush_free(dpt, ccb);
splx(ospl);
#ifdef DPT_MEASURE_PERFORMANCE
{
u_int32_t result;
struct timeval junk;
microtime(&junk);
ccb->command_ended = junk;
#define time_delta dpt_time_delta(ccb->command_started, ccb->command_ended)
result = time_delta;
#define maxctime dpt->performance.max_command_time[ccb->eata_ccb.cp_scsi_cmd]
#define minctime dpt->performance.min_command_time[ccb->eata_ccb.cp_scsi_cmd]
if (result != ~0) {
if (maxctime < result) {
maxctime = result;
}
if ((minctime == 0)
|| (minctime > result))
minctime = result;
}
}
#endif
scsi_done(xs);
}
ospl = splcam();
}
}
splx(ospl);
/**
* As per Justin's suggestion, we now will call the run_queue for
* this HBA. This is done in case there are left-over requests that
* were not submitted yet.
*/
dpt_run_queue(dpt, 0);
ospl = splsoftcam();
dpt->queue_status &= ~DPT_COMPLETED_QUEUE_ACTIVE;
splx(ospl);
}
#ifdef DPT_MEASURE_PERFORMANCE
/**
* Given a dpt_ccb and a scsi_xfr structures,
* this functions translates the result of a SCSI operation.
* It returns values in the structures pointed by the arguments.
* This function does NOT attempt to protect itself from bad influence!
*/
#define WRITE_OP 1
#define READ_OP 2
#define min_submitR dpt->performance.read_by_size_min_time[index]
#define max_submitR dpt->performance.read_by_size_max_time[index]
#define min_submitW dpt->performance.write_by_size_min_time[index]
#define max_submitW dpt->performance.write_by_size_max_time[index]
static void
dpt_IObySize(dpt_softc_t * dpt, dpt_ccb_t * ccb, int op, int index)
{
if (op == READ_OP) {
++dpt->performance.read_by_size_count[index];
if (ccb->submitted_time < min_submitR)
min_submitR = ccb->submitted_time;
if (ccb->submitted_time > max_submitR)
max_submitR = ccb->submitted_time;
} else { /* WRITE operation */
++dpt->performance.write_by_size_count[index];
if (ccb->submitted_time < min_submitW)
min_submitW = ccb->submitted_time;
if (ccb->submitted_time > max_submitW)
max_submitW = ccb->submitted_time;
}
}
#endif
static int
dpt_process_completion(dpt_softc_t * dpt,
dpt_ccb_t * ccb)
{
int ospl;
struct scsi_xfer *xs;
if (ccb == NULL) {
panic("dpt%d: Improper argumet to process_completion (%p%p)\n",
dpt->unit, ccb);
} else {
xs = ccb->xs;
}
#ifdef DPT_MEASURE_PERFORMANCE
{
u_int32_t size;
struct scsi_rw_big *cmd;
int op_type;
cmd = (struct scsi_rw_big *) & ccb->eata_ccb.cp_scsi_cmd;
switch (cmd->op_code) {
case 0xa8: /* 12-byte READ */
case 0x08: /* 6-byte READ */
case 0x28: /* 10-byte READ */
op_type = READ_OP;
break;
case 0x0a: /* 6-byte WRITE */
case 0xaa: /* 12-byte WRITE */
case 0x2a: /* 10-byte WRITE */
op_type = WRITE_OP;
break;
default:
op_type = 0;
break;
}
if (op_type != 0) {
size = (((u_int32_t) cmd->length2 << 8)
| ((u_int32_t) cmd->length1)) << 9;
switch (size) {
case 512:
dpt_IObySize(dpt, ccb, op_type, SIZE_512);
break;
case 1024:
dpt_IObySize(dpt, ccb, op_type, SIZE_1K);
break;
case 2048:
dpt_IObySize(dpt, ccb, op_type, SIZE_2K);
break;
case 4096:
dpt_IObySize(dpt, ccb, op_type, SIZE_4K);
break;
case 8192:
dpt_IObySize(dpt, ccb, op_type, SIZE_8K);
break;
case 16384:
dpt_IObySize(dpt, ccb, op_type, SIZE_16K);
break;
case 32768:
dpt_IObySize(dpt, ccb, op_type, SIZE_32K);
break;
case 65536:
dpt_IObySize(dpt, ccb, op_type, SIZE_64K);
break;
default:
if (size > (1 << 16))
dpt_IObySize(dpt, ccb, op_type,
SIZE_BIGGER);
else
dpt_IObySize(dpt, ccb, op_type,
SIZE_OTHER);
break;
}
}
}
#endif /* DPT_MEASURE_PERFORMANCE */
switch ((int) ccb->status_packet.hba_stat) {
case HA_NO_ERROR:
if (xs != NULL) {
xs->error = XS_NOERROR;
xs->flags |= SCSI_ITSDONE;
}
break;
case HA_ERR_SEL_TO:
case HA_ERR_CMD_TO:
if (xs != NULL) {
xs->error |= XS_SELTIMEOUT;
xs->flags |= SCSI_ITSDONE;
}
break;
case HA_SCSIBUS_RESET:
case HA_CP_ABORTED:
case HA_CP_RESET:
case HA_PCI_PARITY:
case HA_PCI_MABORT:
case HA_PCI_TABORT:
case HA_PCI_STABORT:
case HA_BUS_PARITY:
case HA_UNX_MSGRJCT:
if (ccb->retries++ > DPT_RETRIES) {
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
} else {
ospl = splsoftcam();
dpt_Qpush_waiting(dpt, ccb);
splx(ospl);
dpt_sched_queue(dpt);
}
break;
case HA_HBA_POWER_UP:
case HA_UNX_BUSPHASE:
case HA_UNX_BUS_FREE:
case HA_SCSI_HUNG:
case HA_RESET_STUCK:
if (ccb->retries++ > DPT_RETRIES) {
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
} else {
ospl = splsoftcam();
dpt_Qpush_waiting(dpt, ccb);
splx(ospl);
dpt_sched_queue(dpt);
return (1);
}
break;
case HA_RSENSE_FAIL:
if (ccb->status_packet.EOC) {
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
} else {
if (ccb->retries++ > DPT_RETRIES) {
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
} else {
ospl = splsoftcam();
dpt_Qpush_waiting(dpt, ccb);
splx(ospl);
dpt_sched_queue(dpt);
return (1);
}
}
break;
case HA_PARITY_ERR:
case HA_CP_ABORT_NA:
case HA_CP_RESET_NA:
case HA_ECC_ERR:
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
break;
default:
printf("dpt%d: Undocumented Error %x",
dpt->unit, ccb->status_packet.hba_stat);
if (xs != NULL) {
xs->error |= XS_SENSE;
xs->flags |= SCSI_ITSDONE;
}
Debugger("Please mail this message to shimon@i-connect.net");
break;
}
if (xs != NULL) {
if ((xs->error & XS_SENSE))
bcopy(&ccb->sense_data, &xs->sense,
sizeof(struct scsi_sense_data));
if (ccb->status_packet.residue_len != 0) {
xs->flags |= SCSI_RESID_VALID;
xs->resid = ccb->status_packet.residue_len;
}
}
return (0);
}
#ifdef DPT_LOST_IRQ
/**
* This functions handles the calling of the interrupt routine on a periodic
* basis.
* It is a completely ugly hack which purpose is to handle the problem of
* missing interrupts on certain platforms..
*/
static void
dpt_irq_timeout(void *arg)
{
dpt_softc_t *dpt = (dpt_softc_t *) arg;
int ospl;
if (!(dpt->state & DPT_LOST_IRQ_ACTIVE)) {
ospl = splcam();
dpt->state |= DPT_LOST_IRQ_ACTIVE;
dpt_intr(dpt);
splx(ospl);
if (dpt->state & DPT_LOST_IRQ_ACTIVE) {
printf("dpt %d: %d lost Interrupts Recovered\n",
dpt->unit, ++dpt->lost_interrupts);
}
dpt->state &= ~DPT_LOST_IRQ_ACTIVE;
}
timeout(dpt_irq_timeout, (caddr_t) dpt, hz * 1);
}
#endif /* DPT_LOST_IRQ */
#ifdef DPT_HANDLE_TIMEOUTS
/**
* This function walks down the SUBMITTED queue.
* Every request that is too old gets aborted and marked.
* Since the DPT will complete (interrupt) immediately (what does that mean?),
* We just walk the list, aborting old commands and marking them as such.
* The dpt_complete function will get rid of the that were interrupted in the
* normal manner.
*
* This function needs to run at splcam(), as it interacts with the submitted
* queue, as well as the completed and free queues. Just like dpt_intr() does.
* To run it at any ISPL other than that of dpt_intr(), will mean that dpt_intr
* willbe able to pre-empt it, grab a transaction in progress (towards
* destruction) and operate on it. The state of this transaction will be not
* very clear.
* The only other option, is to lock it only as long as necessary but have
* dpt_intr() spin-wait on it. In a UP environment this makes no sense and in
* a SMP environment, the advantage is dubvious for a function that runs once
* every ten seconds for few microseconds and, on systems with healthy
* hardware, does not do anything anyway.
*/
static void
dpt_handle_timeouts(dpt_softc_t * dpt)
{
dpt_ccb_t *ccb;
int ospl;
ospl = splcam();
if (dpt->state & DPT_HA_TIMEOUTS_ACTIVE) {
printf("dpt%d WARNING: Timeout Handling Collision\n",
dpt->unit);
splx(ospl);
return;
}
dpt->state |= DPT_HA_TIMEOUTS_ACTIVE;
/* Loop through the entire submitted queue, looking for lost souls */
for (ccb = TAILQ_FIRST(&dpt->submitted_ccbs);
ccb != NULL;
ccb = TAILQ_NEXT(ccb, links)) {
struct scsi_xfer *xs;
struct timeval now;
u_int32_t age, max_age;
xs = ccb->xs;
microtime(&now);
age = dpt_time_delta(ccb->command_started, now);
#define TenSec 10000000
if (xs == NULL) { /* Local, non-kernel call */
max_age = TenSec;
} else {
max_age = (((xs->timeout * (dpt->submitted_ccbs_count
+ DPT_TIMEOUT_FACTOR))
> TenSec)
? (xs->timeout * (dpt->submitted_ccbs_count
+ DPT_TIMEOUT_FACTOR))
: TenSec);
}
/*
* If a transaction is marked lost and is TWICE as old as we
* care, then, and only then do we destroy it!
*/
if (ccb->state & DPT_CCB_STATE_MARKED_LOST) {
/* Remember who is next */
if (age > (max_age * 2)) {
dpt_Qremove_submitted(dpt, ccb);
ccb->state &= ~DPT_CCB_STATE_MARKED_LOST;
ccb->state |= DPT_CCB_STATE_ABORTED;
#define cmd_name scsi_cmd_name(ccb->eata_ccb.cp_scsi_cmd)
if (ccb->retries++ > DPT_RETRIES) {
printf("dpt%d ERROR: Destroying stale "
"%d (%s)\n"
" on "
"c%db%dt%du%d (%d/%d)\n",
dpt->unit, ccb->transaction_id,
cmd_name,
dpt->unit,
ccb->eata_ccb.cp_channel,
ccb->eata_ccb.cp_id,
ccb->eata_ccb.cp_LUN, age,
ccb->retries);
#define send_ccb &ccb->eata_ccb
#define ESA EATA_SPECIFIC_ABORT
(void) dpt_send_immediate(dpt,
send_ccb,
ESA,
0, 0);
dpt_Qpush_free(dpt, ccb);
/* The SCSI layer should re-try */
xs->error |= XS_TIMEOUT;
xs->flags |= SCSI_ITSDONE;
scsi_done(xs);
} else {
printf("dpt%d ERROR: Stale %d (%s) on "
"c%db%dt%du%d (%d)\n"
" gets another "
"chance(%d/%d)\n",
dpt->unit, ccb->transaction_id,
cmd_name,
dpt->unit,
ccb->eata_ccb.cp_channel,
ccb->eata_ccb.cp_id,
ccb->eata_ccb.cp_LUN,
age, ccb->retries, DPT_RETRIES);
dpt_Qpush_waiting(dpt, ccb);
dpt_sched_queue(dpt);
}
}
} else {
/*
* This is a transaction that is not to be destroyed
* (yet) But it is too old for our liking. We wait as
* long as the upper layer thinks. Not really, we
* multiply that by the number of commands in the
* submitted queue + 1.
*/
if (!(ccb->state & DPT_CCB_STATE_MARKED_LOST) &&
(age != ~0) && (age > max_age)) {
printf("dpt%d ERROR: Marking %d (%s) on "
"c%db%dt%du%d \n"
" as late after %dusec\n",
dpt->unit, ccb->transaction_id,
cmd_name,
dpt->unit, ccb->eata_ccb.cp_channel,
ccb->eata_ccb.cp_id,
ccb->eata_ccb.cp_LUN, age);
ccb->state |= DPT_CCB_STATE_MARKED_LOST;
}
}
}
dpt->state &= ~DPT_HA_TIMEOUTS_ACTIVE;
splx(ospl);
}
static void
dpt_timeout(void *arg)
{
dpt_softc_t *dpt = (dpt_softc_t *) arg;
if (!(dpt->state & DPT_HA_TIMEOUTS_ACTIVE))
dpt_handle_timeouts(dpt);
timeout(dpt_timeout, (caddr_t) dpt, hz * 10);
}
#endif /* DPT_HANDLE_TIMEOUTS */
/*
* Remove a ccb from the completed queue
*/
static INLINE_Q void
dpt_Qremove_completed(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
#ifdef DPT_MEASURE_PERFORMANCE
u_int32_t complete_time;
struct timeval now;
microtime(&now);
complete_time = dpt_time_delta(ccb->command_ended, now);
if (complete_time != ~0) {
if (dpt->performance.max_complete_time < complete_time)
dpt->performance.max_complete_time = complete_time;
if (complete_time < dpt->performance.min_complete_time)
dpt->performance.min_complete_time = complete_time;
}
#endif
TAILQ_REMOVE(&dpt->completed_ccbs, ccb, links);
--dpt->completed_ccbs_count; /* One less completed ccb in the
* queue */
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Pop the most recently used ccb off the (HEAD of the) FREE ccb queue
*/
static INLINE_Q dpt_ccb_t *
dpt_Qpop_free(dpt_softc_t * dpt)
{
dpt_ccb_t *ccb;
if ((ccb = TAILQ_FIRST(&dpt->free_ccbs)) == NULL) {
if (dpt_alloc_freelist(dpt))
return (ccb);
else
return (dpt_Qpop_free(dpt));
} else {
TAILQ_REMOVE(&dpt->free_ccbs, ccb, links);
--dpt->free_ccbs_count;
}
return (ccb);
}
/**
* Put a (now freed) ccb back into the HEAD of the FREE ccb queue
*/
static INLINE_Q void
dpt_Qpush_free(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
#ifdef DPT_FREELIST_IS_STACK
TAILQ_INSERT_HEAD(&dpt->free_ccbs, ccb, links)
#else
TAILQ_INSERT_TAIL(&dpt->free_ccbs, ccb, links);
#endif
++dpt->free_ccbs_count;
}
/**
* Add a request to the TAIL of the WAITING ccb queue
*/
static INLINE_Q void
dpt_Qadd_waiting(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
struct timeval junk;
TAILQ_INSERT_TAIL(&dpt->waiting_ccbs, ccb, links);
++dpt->waiting_ccbs_count;
#ifdef DPT_MEASURE_PERFORMANCE
microtime(&junk);
ccb->command_ended = junk;
if (dpt->waiting_ccbs_count > dpt->performance.max_waiting_count)
dpt->performance.max_waiting_count = dpt->waiting_ccbs_count;
#endif
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Add a request to the HEAD of the WAITING ccb queue
*/
static INLINE_Q void
dpt_Qpush_waiting(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
struct timeval junk;
TAILQ_INSERT_HEAD(&dpt->waiting_ccbs, ccb, links);
++dpt->waiting_ccbs_count;
#ifdef DPT_MEASURE_PERFORMANCE
microtime(&junk);
ccb->command_ended = junk;
if (dpt->performance.max_waiting_count < dpt->waiting_ccbs_count)
dpt->performance.max_waiting_count = dpt->waiting_ccbs_count;
#endif
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Remove a ccb from the waiting queue
*/
static INLINE_Q void
dpt_Qremove_waiting(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
#ifdef DPT_MEASURE_PERFORMANCE
struct timeval now;
u_int32_t waiting_time;
microtime(&now);
waiting_time = dpt_time_delta(ccb->command_ended, now);
if (waiting_time != ~0) {
if (dpt->performance.max_waiting_time < waiting_time)
dpt->performance.max_waiting_time = waiting_time;
if (waiting_time < dpt->performance.min_waiting_time)
dpt->performance.min_waiting_time = waiting_time;
}
#endif
TAILQ_REMOVE(&dpt->waiting_ccbs, ccb, links);
--dpt->waiting_ccbs_count; /* One less waiting ccb in the queue */
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Add a request to the TAIL of the SUBMITTED ccb queue
*/
static INLINE_Q void
dpt_Qadd_submitted(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
struct timeval junk;
TAILQ_INSERT_TAIL(&dpt->submitted_ccbs, ccb, links);
++dpt->submitted_ccbs_count;
#ifdef DPT_MEASURE_PERFORMANCE
microtime(&junk);
ccb->command_ended = junk;
if (dpt->performance.max_submit_count < dpt->submitted_ccbs_count)
dpt->performance.max_submit_count = dpt->submitted_ccbs_count;
#endif
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Add a request to the TAIL of the Completed ccb queue
*/
static INLINE_Q void
dpt_Qadd_completed(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
struct timeval junk;
TAILQ_INSERT_TAIL(&dpt->completed_ccbs, ccb, links);
++dpt->completed_ccbs_count;
#ifdef DPT_MEASURE_PERFORMANCE
microtime(&junk);
ccb->command_ended = junk;
if (dpt->performance.max_complete_count < dpt->completed_ccbs_count)
dpt->performance.max_complete_count =
dpt->completed_ccbs_count;
#endif
if (dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
wakeup(&dpt);
}
/**
* Remove a ccb from the submitted queue
*/
static INLINE_Q void
dpt_Qremove_submitted(dpt_softc_t * dpt, dpt_ccb_t * ccb)
{
#ifdef DPT_MEASURE_PERFORMANCE
struct timeval now;
u_int32_t submit_time;
microtime(&now);
submit_time = dpt_time_delta(ccb->command_ended, now);
if (submit_time != ~0) {
ccb->submitted_time = submit_time;
if (dpt->performance.max_submit_time < submit_time)
dpt->performance.max_submit_time = submit_time;
if (submit_time < dpt->performance.min_submit_time)
dpt->performance.min_submit_time = submit_time;
} else {
ccb->submitted_time = 0;
}
#endif
TAILQ_REMOVE(&dpt->submitted_ccbs, ccb, links);
--dpt->submitted_ccbs_count; /* One less submitted ccb in the
* queue */
if ((dpt->state & DPT_HA_SHUTDOWN_ACTIVE)
|| (dpt->state & DPT_HA_QUIET))
wakeup(&dpt);
}
/**
* Handle Shutdowns.
* Gets registered by the dpt_pci.c registar and called AFTER the system did
* all its sync work.
*/
void
dpt_shutdown(int howto, void *arg_dpt)
{
dpt_softc_t *ldpt;
u_int8_t channel;
u_int32_t target;
u_int32_t lun;
int waiting;
int submitted;
int completed;
int huh;
int wait_is_over;
int ospl;
dpt_softc_t *dpt;
dpt = (dpt_softc_t *) arg_dpt;
printf("dpt%d: Shutting down (mode %d) HBA. Please wait...",
dpt->unit, howto);
wait_is_over = 0;
ospl = splcam();
dpt->state |= DPT_HA_SHUTDOWN_ACTIVE;
splx(ospl);
while ((((waiting = dpt->waiting_ccbs_count) != 0)
|| ((submitted = dpt->submitted_ccbs_count) != 0)
|| ((completed = dpt->completed_ccbs_count) != 0))
&& (wait_is_over == 0)) {
#ifdef DPT_DEBUG_SHUTDOWN
printf("dpt%d: Waiting for queues w%ds%dc%d to deplete\n",
dpt->unit, dpt->waiting_ccbs_count,
dpt->submitted_ccbs_count,
dpt->completed_ccbs_count);
#endif
huh = tsleep((void *) dpt, PCATCH | PRIBIO, "dptoff", 100 * hz);
switch (huh) {
case 0:
/* Wakeup call received */
goto checkit;
break;
case EWOULDBLOCK:
/* Timer Expired */
printf("dpt%d: Shutdown timer expired with queues at "
"w%ds%dc%d\n",
dpt->unit, dpt->waiting_ccbs_count,
dpt->submitted_ccbs_count,
dpt->completed_ccbs_count);
++wait_is_over;
break;
default:
/* anything else */
printf("dpt%d: Shutdown UNKNOWN with qeueues at "
"w%ds%dc%d\n",
dpt->unit, dpt->waiting_ccbs_count,
dpt->submitted_ccbs_count,
dpt->completed_ccbs_count);
++wait_is_over;
break;
}
checkit:
}
/**
* What we do for a shutdown, is give the DPT early power loss
* warning
. */
(void) dpt_send_immediate(dpt, NULL, EATA_POWER_OFF_WARN, 0, 0);
printf("dpt%d: Controller was warned of shutdown and is now "
"disabled\n",
dpt->unit);
return;
}
/* A primitive subset of isgraph. Used by hex_dump below */
#define IsGraph(val) ((((val) >= ' ') && ((val) <= '~')))
/**
* This function dumps bytes to the screen in hex format.
*/
void
hex_dump(u_int8_t * data, int length, char *name, int no)
{
int line, column, ndx;
printf("Kernel Hex Dump for %s-%d at %p (%d bytes)\n",
name, no, data, length);
/* Zero out all the counters and repeat for as many bytes as we have */
for (ndx = 0, column = 0, line = 0; ndx < length; ndx++) {
/* Print relative offset at the beginning of every line */
if (column == 0)
printf("%04x ", ndx);
/* Print the byte as two hex digits, followed by a space */
printf("%02x ", data[ndx]);
/* Split the row of 16 bytes in half */
if (++column == 8) {
printf(" ");
}
/* St the end of each row of 16 bytes, put a space ... */
if (column == 16) {
printf(" ");
/* ... and then print the ASCII-visible on a line. */
for (column = 0; column < 16; column++) {
int ascii_pos = ndx - 15 + column;
/**
* Non-printable and non-ASCII are just a
* dot. ;-(
*/
if (IsGraph(data[ascii_pos]))
printf("%c", data[ascii_pos]);
else
printf(".");
}
/* Each line ends with a new line */
printf("\n");
column = 0;
/**
* Every 256 bytes (16 lines of 16 bytes each) have
* an empty line, separating them from the next
* ``page''. Yes, I programmed on a Z-80, where a
* page was 256 bytes :-)
*/
if (++line > 15) {
printf("\n");
line = 0;
}
}
}
/**
* We are basically done. We do want, however, to handle the ASCII
* translation of fractional lines.
*/
if ((ndx == length) && (column != 0)) {
int modulus = 16 - column, spaces = modulus * 3,
skip;
/**
* Skip to the right, as many spaces as there are bytes
* ``missing'' ...
*/
for (skip = 0; skip < spaces; skip++)
printf(" ");
/* ... And the gap separating the hex dump from the ASCII */
printf(" ");
/**
* Do not forget the extra space that splits the hex dump
* vertically
*/
if (column < 8)
printf(" ");
for (column = 0; column < (16 - modulus); column++) {
int ascii_pos = ndx - (16 - modulus) + column;
if (IsGraph(data[ascii_pos]))
printf("%c", data[ascii_pos]);
else
printf(".");
}
printf("\n");
}
}
/**
* and this one presents an integer as ones and zeros
*/
static char i2bin_bitmap[48]; /* Used for binary dump of registers */
char *
i2bin(unsigned int no, int length)
{
int ndx, rind;
for (ndx = 0, rind = 0; ndx < 32; ndx++, rind++) {
i2bin_bitmap[rind] = (((no << ndx) & 0x80000000) ? '1' : '0');
if (((ndx % 4) == 3))
i2bin_bitmap[++rind] = ' ';
}
if ((ndx % 4) == 3)
i2bin_bitmap[rind - 1] = '\0';
else
i2bin_bitmap[rind] = '\0';
switch (length) {
case 8:
return (i2bin_bitmap + 30);
break;
case 16:
return (i2bin_bitmap + 20);
break;
case 24:
return (i2bin_bitmap + 10);
break;
case 32:
return (i2bin_bitmap);
default:
return ("i2bin: Invalid length Specs");
break;
}
}
/**
* This function translates a SCSI command numeric code to a human readable
* string.
* The string contains the class of devices, scope, description, (length),
* and [SCSI III documentation section].
*/
char *
scsi_cmd_name(u_int8_t cmd)
{
switch (cmd) {
case 0x40:
return ("Change Definition [7.1]");
break;
case 0x39:
return ("Compare [7,2]");
break;
case 0x18:
return ("Copy [7.3]");
break;
case 0x3a:
return ("Copy and Verify [7.4]");
break;
case 0x04:
return ("Format Unit [6.1.1]");
break;
case 0x12:
return ("Inquiry [7.5]");
break;
case 0x36:
return ("lock/Unlock Cache [6.1.2]");
break;
case 0x4c:
return ("Log Select [7.6]");
break;
case 0x4d:
return ("Log Sense [7.7]");
break;
case 0x15:
return ("Mode select (6) [7.8]");
break;
case 0x55:
return ("Mode Select (10) [7.9]");
break;
case 0x1a:
return ("Mode Sense (6) [7.10]");
break;
case 0x5a:
return ("Mode Sense (10) [7.11]");
break;
case 0xa7:
return ("Move Medium Attached [SMC]");
break;
case 0x5e:
return ("Persistent Reserve In [7.12]");
break;
case 0x5f:
return ("Persistent Reserve Out [7.13]");
break;
case 0x1e:
return ("Prevent/Allow Medium Removal [7.14]");
break;
case 0x08:
return ("Read, Receive (6) [6.1.5]");
break;
case 0x28:
return ("Read (10) [6.1.5]");
break;
case 0xa8:
return ("Read (12) [6.1.5]");
break;
case 0x3c:
return ("Read Buffer [7.15]");
break;
case 0x25:
return ("Read Capacity [6.1.6]");
break;
case 0x37:
return ("Read Defect Data (10) [6.1.7]");
break;
case 0xb7:
return ("Read Defect Data (12) [6.2.5]");
break;
case 0xb4:
return ("Read Element Status Attached [SMC]");
break;
case 0x3e:
return ("Read Long [6.1.8]");
break;
case 0x07:
return ("Reassign Blocks [6.1.9]");
break;
case 0x81:
return ("Rebuild [6.1.10]");
break;
case 0x1c:
return ("Receive Diagnostics Result [7.16]");
break;
case 0x82:
return ("Regenerate [6.1.11]");
break;
case 0x17:
return ("Release(6) [7.17]");
break;
case 0x57:
return ("Release(10) [7.18]");
break;
case 0xa0:
return ("Report LUNs [7.19]");
break;
case 0x03:
return ("Request Sense [7.20]");
break;
case 0x16:
return ("Resereve (6) [7.21]");
break;
case 0x56:
return ("Reserve(10) [7.22]");
break;
case 0x2b:
return ("Reserve(10) [6.1.12]");
break;
case 0x1d:
return ("Send Disagnostics [7.23]");
break;
case 0x33:
return ("Set Limit (10) [6.1.13]");
break;
case 0xb3:
return ("Set Limit (12) [6.2.8]");
break;
case 0x1b:
return ("Start/Stop Unit [6.1.14]");
break;
case 0x35:
return ("Synchronize Cache [6.1.15]");
break;
case 0x00:
return ("Test Unit Ready [7.24]");
break;
case 0x3d:
return ("Update Block (6.2.9");
break;
case 0x2f:
return ("Verify (10) [6.1.16, 6.2.10]");
break;
case 0xaf:
return ("Verify (12) [6.2.11]");
break;
case 0x0a:
return ("Write, Send (6) [6.1.17, 9.2]");
break;
case 0x2a:
return ("Write (10) [6.1.18]");
break;
case 0xaa:
return ("Write (12) [6.2.13]");
break;
case 0x2e:
return ("Write and Verify (10) [6.1.19, 6.2.14]");
break;
case 0xae:
return ("Write and Verify (12) [6.1.19, 6.2.15]");
break;
case 0x03b:
return ("Write Buffer [7.25]");
break;
case 0x03f:
return ("Write Long [6.1.20]");
break;
case 0x041:
return ("Write Same [6.1.21]");
break;
case 0x052:
return ("XD Read [6.1.22]");
break;
case 0x050:
return ("XD Write [6.1.22]");
break;
case 0x080:
return ("XD Write Extended [6.1.22]");
break;
case 0x051:
return ("XO Write [6.1.22]");
break;
default:
return ("Unknown SCSI Command");
}
}
/* End of the DPT driver */
/**
* Hello emacs, these are the
* Local Variables:
* c-indent-level: 8
* c-continued-statement-offset: 8
* c-continued-brace-offset: 0
* c-brace-offset: -8
* c-brace-imaginary-offset: 0
* c-argdecl-indent: 8
* c-label-offset: -8
* c++-hanging-braces: 1
* c++-access-specifier-offset: -8
* c++-empty-arglist-indent: 8
* c++-friend-offset: 0
* End:
*/
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