isp.c

这个linux源代码是很全面的~基本完整了~使用c编译的~由于时间问题我没有亲自测试~但就算用来做参考资料也是非常好的

		USEC_DELAY(100);
		if (--loops < 0) {
			ISP_DUMPREGS(isp, "chip reset timed out");
			return;
		}
	}

	/*
	 * After we've fired this chip up, zero out the conf1 register
	 * for SCSI adapters and other settings for the 2100.
	 */

	if (IS_SCSI(isp)) {
		ISP_WRITE(isp, BIU_CONF1, 0);
	} else {
		ISP_WRITE(isp, BIU2100_CSR, 0);
	}

	/*
	 * Reset RISC Processor
	 */
	ISP_WRITE(isp, HCCR, HCCR_CMD_RESET);
	USEC_DELAY(100);
	/* Clear semaphore register (just to be sure) */
	ISP_WRITE(isp, BIU_SEMA, 0);

	/*
	 * Establish some initial burst rate stuff.
	 * (only for the 1XX0 boards). This really should
	 * be done later after fetching from NVRAM.
	 */
	if (IS_SCSI(isp)) {
		u_int16_t tmp = isp->isp_mdvec->dv_conf1;
		/*
		 * Busted FIFO. Turn off all but burst enables.
		 */
		if (isp->isp_type == ISP_HA_SCSI_1040A) {
			tmp &= BIU_BURST_ENABLE;
		}
		ISP_SETBITS(isp, BIU_CONF1, tmp);
		if (tmp & BIU_BURST_ENABLE) {
			ISP_SETBITS(isp, CDMA_CONF, DMA_ENABLE_BURST);
			ISP_SETBITS(isp, DDMA_CONF, DMA_ENABLE_BURST);
		}
#ifdef	PTI_CARDS
		if (((sdparam *) isp->isp_param)->isp_ultramode) {
			while (ISP_READ(isp, RISC_MTR) != 0x1313) {
				ISP_WRITE(isp, RISC_MTR, 0x1313);
				ISP_WRITE(isp, HCCR, HCCR_CMD_STEP);
			}
		} else {
			ISP_WRITE(isp, RISC_MTR, 0x1212);
		}
		/*
		 * PTI specific register
		 */
		ISP_WRITE(isp, RISC_EMB, DUAL_BANK)
#else
		ISP_WRITE(isp, RISC_MTR, 0x1212);
#endif
	} else {
		ISP_WRITE(isp, RISC_MTR2100, 0x1212);
		if (IS_2200(isp) || IS_23XX(isp)) {
			ISP_WRITE(isp, HCCR, HCCR_2X00_DISABLE_PARITY_PAUSE);
		}
	}

	ISP_WRITE(isp, HCCR, HCCR_CMD_RELEASE); /* release paused processor */

	/*
	 * Do MD specific post initialization
	 */
	ISP_RESET1(isp);

	/*
	 * Wait for everything to finish firing up.
	 *
	 * Avoid doing this on the 2312 because you can generate a PCI
	 * parity error (chip breakage).
	 */
	if (IS_23XX(isp)) {
		USEC_DELAY(5);
	} else {
		loops = MBOX_DELAY_COUNT;
		while (ISP_READ(isp, OUTMAILBOX0) == MBOX_BUSY) {
			USEC_DELAY(100);
			if (--loops < 0) {
				isp_prt(isp, ISP_LOGERR,
				    "MBOX_BUSY never cleared on reset");
				return;
			}
		}
	}

	/*
	 * Up until this point we've done everything by just reading or
	 * setting registers. From this point on we rely on at least *some*
	 * kind of firmware running in the card.
	 */

	/*
	 * Do some sanity checking.
	 */
	mbs.param[0] = MBOX_NO_OP;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}

	if (IS_SCSI(isp)) {
		mbs.param[0] = MBOX_MAILBOX_REG_TEST;
		mbs.param[1] = 0xdead;
		mbs.param[2] = 0xbeef;
		mbs.param[3] = 0xffff;
		mbs.param[4] = 0x1111;
		mbs.param[5] = 0xa5a5;
		isp_mboxcmd(isp, &mbs, MBLOGALL);
		if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
			return;
		}
		if (mbs.param[1] != 0xdead || mbs.param[2] != 0xbeef ||
		    mbs.param[3] != 0xffff || mbs.param[4] != 0x1111 ||
		    mbs.param[5] != 0xa5a5) {
			isp_prt(isp, ISP_LOGERR,
			    "Register Test Failed (0x%x 0x%x 0x%x 0x%x 0x%x)",
			    mbs.param[1], mbs.param[2], mbs.param[3],
			    mbs.param[4], mbs.param[5]);
			return;
		}

	}

	/*
	 * Download new Firmware, unless requested not to do so.
	 * This is made slightly trickier in some cases where the
	 * firmware of the ROM revision is newer than the revision
	 * compiled into the driver. So, where we used to compare
	 * versions of our f/w and the ROM f/w, now we just see
	 * whether we have f/w at all and whether a config flag
	 * has disabled our download.
	 */
	if ((isp->isp_mdvec->dv_ispfw == NULL) ||
	    (isp->isp_confopts & ISP_CFG_NORELOAD)) {
		dodnld = 0;
	}

	if (IS_23XX(isp))
		code_org = ISP_CODE_ORG_2300;
	else
		code_org = ISP_CODE_ORG;

	if (dodnld) {
		isp->isp_mbxworkp = (void *) &isp->isp_mdvec->dv_ispfw[1];
		isp->isp_mbxwrk0 = isp->isp_mdvec->dv_ispfw[3] - 1;
		isp->isp_mbxwrk1 = code_org + 1;
		mbs.param[0] = MBOX_WRITE_RAM_WORD;
		mbs.param[1] = code_org;
		mbs.param[2] = isp->isp_mdvec->dv_ispfw[0];
		isp_mboxcmd(isp, &mbs, MBLOGNONE);
		if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
			isp_prt(isp, ISP_LOGERR,
			    "F/W download failed at word %d",
			    isp->isp_mbxwrk1 - code_org);
			dodnld = 0;
			goto again;
		}
		/*
		 * Verify that it downloaded correctly.
		 */
		mbs.param[0] = MBOX_VERIFY_CHECKSUM;
		mbs.param[1] = code_org;
		isp_mboxcmd(isp, &mbs, MBLOGNONE);
		if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
			isp_prt(isp, ISP_LOGERR, "Ram Checksum Failure");
			return;
		}
		isp->isp_loaded_fw = 1;
	} else {
		isp->isp_loaded_fw = 0;
		isp_prt(isp, ISP_LOGDEBUG2, "skipping f/w download");
	}

	/*
	 * Now start it rolling.
	 *
	 * If we didn't actually download f/w,
	 * we still need to (re)start it.
	 */


	mbs.param[0] = MBOX_EXEC_FIRMWARE;
	mbs.param[1] = code_org;
	isp_mboxcmd(isp, &mbs, MBLOGNONE);
	/* give it a chance to start */
	USEC_SLEEP(isp, 500);

	if (IS_SCSI(isp)) {
		/*
		 * Set CLOCK RATE, but only if asked to.
		 */
		if (isp->isp_clock) {
			mbs.param[0] = MBOX_SET_CLOCK_RATE;
			mbs.param[1] = isp->isp_clock;
			isp_mboxcmd(isp, &mbs, MBLOGALL);
			/* we will try not to care if this fails */
		}
	}

	mbs.param[0] = MBOX_ABOUT_FIRMWARE;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}

	/*
	 * The SBus firmware that we are using apparently does not return
	 * major, minor, micro revisions in the mailbox registers, which
	 * is really, really, annoying.
	 */
	if (ISP_SBUS_SUPPORTED && isp->isp_bustype == ISP_BT_SBUS) {
		if (dodnld) {
#ifdef	ISP_TARGET_MODE
			isp->isp_fwrev[0] = 7;
			isp->isp_fwrev[1] = 55;
#else
			isp->isp_fwrev[0] = 1;
			isp->isp_fwrev[1] = 37;
#endif
			isp->isp_fwrev[2] = 0;
		} 
	} else {
		isp->isp_fwrev[0] = mbs.param[1];
		isp->isp_fwrev[1] = mbs.param[2];
		isp->isp_fwrev[2] = mbs.param[3];
	}
	isp_prt(isp, ISP_LOGCONFIG,
	    "Board Type %s, Chip Revision 0x%x, %s F/W Revision %d.%d.%d",
	    btype, isp->isp_revision, dodnld? "loaded" : "resident",
	    isp->isp_fwrev[0], isp->isp_fwrev[1], isp->isp_fwrev[2]);

	if (IS_FC(isp)) {
		/*
		 * We do not believe firmware attributes for 2100 code less
		 * than 1.17.0.
		 */
		if (IS_2100(isp) && 
		   (ISP_FW_REVX(isp->isp_fwrev) < ISP_FW_REV(1, 17, 0))) {
			FCPARAM(isp)->isp_fwattr = 0;
		} else {
			FCPARAM(isp)->isp_fwattr = mbs.param[6];
			isp_prt(isp, ISP_LOGDEBUG0,
			    "Firmware Attributes = 0x%x", mbs.param[6]);
		}
		if (ISP_READ(isp, BIU2100_CSR) & BIU2100_PCI64) {
			isp_prt(isp, ISP_LOGCONFIG,
			    "Installed in 64-Bit PCI slot");
		}
	}

	if (isp->isp_romfw_rev[0] || isp->isp_romfw_rev[1] ||
	    isp->isp_romfw_rev[2]) {
		isp_prt(isp, ISP_LOGCONFIG, "Last F/W revision was %d.%d.%d",
		    isp->isp_romfw_rev[0], isp->isp_romfw_rev[1],
		    isp->isp_romfw_rev[2]);
	}

	mbs.param[0] = MBOX_GET_FIRMWARE_STATUS;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}
	isp->isp_maxcmds = mbs.param[2];
	isp_prt(isp, ISP_LOGINFO,
	    "%d max I/O commands supported", mbs.param[2]);
	isp_fw_state(isp);

	/*
	 * Set up DMA for the request and result mailboxes.
	 */
	if (ISP_MBOXDMASETUP(isp) != 0) {
		isp_prt(isp, ISP_LOGERR, "Cannot setup DMA");
		return;
	}
	isp->isp_state = ISP_RESETSTATE;

	/*
	 * Okay- now that we have new firmware running, we now (re)set our
	 * notion of how many luns we support. This is somewhat tricky because
	 * if we haven't loaded firmware, we sometimes do not have an easy way
	 * of knowing how many luns we support.
	 *
	 * Expanded lun firmware gives you 32 luns for SCSI cards and
	 * 65536 luns for Fibre Channel cards.
	 *
	 * It turns out that even for QLogic 2100s with ROM 1.10 and above
	 * we do get a firmware attributes word returned in mailbox register 6.
	 *
	 * Because the lun is in a a different position in the Request Queue
	 * Entry structure for Fibre Channel with expanded lun firmware, we
	 * can only support one lun (lun zero) when we don't know what kind
	 * of firmware we're running.
	 *
	 * Note that we only do this once (the first time thru isp_reset)
	 * because we may be called again after firmware has been loaded once
	 * and released.
	 */
	if (touched == 0) {
		if (IS_SCSI(isp)) {
			if (dodnld) {
				isp->isp_maxluns = 32;
			} else {
				isp->isp_maxluns = 8;
			}
		} else {
			if (FCPARAM(isp)->isp_fwattr & ISP_FW_ATTR_SCCLUN) {
				isp->isp_maxluns = 65536;
			} else {
				isp->isp_maxluns = 16;
			}
		}
	}
}

/*
 * Initialize Parameters of Hardware to a known state.
 *
 * Locks are held before coming here.
 */

void
isp_init(struct ispsoftc *isp)
{
	/*
	 * Must do this first to get defaults established.
	 */
	isp_setdfltparm(isp, 0);
	if (IS_DUALBUS(isp)) {
		isp_setdfltparm(isp, 1);
	}
	if (IS_FC(isp)) {
		isp_fibre_init(isp);
	} else {
		isp_scsi_init(isp);
	}
}

static void
isp_scsi_init(struct ispsoftc *isp)
{
	sdparam *sdp_chan0, *sdp_chan1;
	mbreg_t mbs;

	sdp_chan0 = isp->isp_param;
	sdp_chan1 = sdp_chan0;
	if (IS_DUALBUS(isp)) {
		sdp_chan1++;
	}

	/*
	 * If we have no role (neither target nor initiator), return.
	 */
	if (isp->isp_role == ISP_ROLE_NONE) {
		return;
	}

	/* First do overall per-card settings. */

	/*
	 * If we have fast memory timing enabled, turn it on.
	 */
	if (sdp_chan0->isp_fast_mttr) {
		ISP_WRITE(isp, RISC_MTR, 0x1313);
	}

	/*
	 * Set Retry Delay and Count.
	 * You set both channels at the same time.
	 */
	mbs.param[0] = MBOX_SET_RETRY_COUNT;
	mbs.param[1] = sdp_chan0->isp_retry_count;
	mbs.param[2] = sdp_chan0->isp_retry_delay;
	mbs.param[6] = sdp_chan1->isp_retry_count;
	mbs.param[7] = sdp_chan1->isp_retry_delay;

	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}

	/*
	 * Set ASYNC DATA SETUP time. This is very important.
	 */
	mbs.param[0] = MBOX_SET_ASYNC_DATA_SETUP_TIME;
	mbs.param[1] = sdp_chan0->isp_async_data_setup;
	mbs.param[2] = sdp_chan1->isp_async_data_setup;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}

	/*
	 * Set ACTIVE Negation State.
	 */
	mbs.param[0] = MBOX_SET_ACT_NEG_STATE;
	mbs.param[1] =
	    (sdp_chan0->isp_req_ack_active_neg << 4) |
	    (sdp_chan0->isp_data_line_active_neg << 5);
	mbs.param[2] =
	    (sdp_chan1->isp_req_ack_active_neg << 4) |
	    (sdp_chan1->isp_data_line_active_neg << 5);

	isp_mboxcmd(isp, &mbs, MBLOGNONE);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		isp_prt(isp, ISP_LOGERR,
		    "failed to set active negation state (%d,%d), (%d,%d)",
		    sdp_chan0->isp_req_ack_active_neg,
		    sdp_chan0->isp_data_line_active_neg,
		    sdp_chan1->isp_req_ack_active_neg,
		    sdp_chan1->isp_data_line_active_neg);
		/*
		 * But don't return.
		 */
	}

	/*
	 * Set the Tag Aging limit
	 */
	mbs.param[0] = MBOX_SET_TAG_AGE_LIMIT;
	mbs.param[1] = sdp_chan0->isp_tag_aging;
	mbs.param[2] = sdp_chan1->isp_tag_aging;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		isp_prt(isp, ISP_LOGERR, "failed to set tag age limit (%d,%d)",
		    sdp_chan0->isp_tag_aging, sdp_chan1->isp_tag_aging);
		return;
	}

	/*
	 * Set selection timeout.
	 */
	mbs.param[0] = MBOX_SET_SELECT_TIMEOUT;
	mbs.param[1] = sdp_chan0->isp_selection_timeout;
	mbs.param[2] = sdp_chan1->isp_selection_timeout;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}

	/* now do per-channel settings */
	isp_scsi_channel_init(isp, 0);
	if (IS_DUALBUS(isp))
		isp_scsi_channel_init(isp, 1);

	/*
	 * Now enable request/response queues
	 */

	mbs.param[0] = MBOX_INIT_RES_QUEUE;
	mbs.param[1] = RESULT_QUEUE_LEN(isp);
	mbs.param[2] = DMA_WD1(isp->isp_result_dma);
	mbs.param[3] = DMA_WD0(isp->isp_result_dma);
	mbs.param[4] = 0;
	mbs.param[5] = 0;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}
	isp->isp_residx = mbs.param[5];

	mbs.param[0] = MBOX_INIT_REQ_QUEUE;
	mbs.param[1] = RQUEST_QUEUE_LEN(isp);
	mbs.param[2] = DMA_WD1(isp->isp_rquest_dma);
	mbs.param[3] = DMA_WD0(isp->isp_rquest_dma);
	mbs.param[4] = 0;
	isp_mboxcmd(isp, &mbs, MBLOGALL);
	if (mbs.param[0] != MBOX_COMMAND_COMPLETE) {
		return;
	}
	isp->isp_reqidx = isp->isp_reqodx = mbs.param[4];

	/*
	 * Turn on Fast Posting, LVD transitions
	 *