/** * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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: */