sym_fw.c

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/*
 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family 
 * of PCI-SCSI IO processors.
 *
 * Copyright (C) 1999-2001  Gerard Roudier <[e-mail]>
 *
 * This driver is derived from the Linux sym53c8xx driver.
 * Copyright (C) 1998-2000  Gerard Roudier
 *
 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been 
 * a port of the FreeBSD ncr driver to Linux-1.2.13.
 *
 * The original ncr driver has been written for 386bsd and FreeBSD by
 *         Wolfgang Stanglmeier        <[e-mail]>
 *         Stefan Esser                <[e-mail]>
 * Copyright (C) 1994  Wolfgang Stanglmeier
 *
 * Other major contributions:
 *
 * NVRAM detection and reading.
 * Copyright (C) 1997 Richard Waltham <[e-mail]>
 *
 *-----------------------------------------------------------------------------
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * Where this Software is combined with software released under the terms of 
 * the GNU Public License ("GPL") and the terms of the GPL would require the 
 * combined work to also be released under the terms of the GPL, the terms
 * and conditions of this License will apply in addition to those of the
 * GPL with the exception of any terms or conditions of this License that
 * conflict with, or are expressly prohibited by, the GPL.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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.
 */

#ifdef __FreeBSD__
#include <dev/sym/sym_glue.h>
#else
#include "sym_glue.h"
#endif

/*
 *  Macros used for all firmwares.
 */
#define	SYM_GEN_A(s, label)	((short) offsetof(s, label)),
#define	SYM_GEN_B(s, label)	((short) offsetof(s, label)),
#define	SYM_GEN_Z(s, label)	((short) offsetof(s, label)),
#define	PADDR_A(label)		SYM_GEN_PADDR_A(struct SYM_FWA_SCR, label)
#define	PADDR_B(label)		SYM_GEN_PADDR_B(struct SYM_FWB_SCR, label)


#if	SYM_CONF_GENERIC_SUPPORT
/*
 *  Allocate firmware #1 script area.
 */
#define	SYM_FWA_SCR		sym_fw1a_scr
#define	SYM_FWB_SCR		sym_fw1b_scr
#define	SYM_FWZ_SCR		sym_fw1z_scr
#ifdef __FreeBSD__
#include <dev/sym/sym_fw1.h>
#else
#include "sym_fw1.h"
#endif
static struct sym_fwa_ofs sym_fw1a_ofs = {
	SYM_GEN_FW_A(struct SYM_FWA_SCR)
};
static struct sym_fwb_ofs sym_fw1b_ofs = {
	SYM_GEN_FW_B(struct SYM_FWB_SCR)
#ifdef SYM_OPT_HANDLE_DIR_UNKNOWN
	SYM_GEN_B(struct SYM_FWB_SCR, data_io)
#endif
};
static struct sym_fwz_ofs sym_fw1z_ofs = {
	SYM_GEN_FW_Z(struct SYM_FWZ_SCR)
#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	SYM_GEN_Z(struct SYM_FWZ_SCR, start_ram)
#endif
};
#undef	SYM_FWA_SCR
#undef	SYM_FWB_SCR
#undef	SYM_FWZ_SCR
#endif	/* SYM_CONF_GENERIC_SUPPORT */

/*
 *  Allocate firmware #2 script area.
 */
#define	SYM_FWA_SCR		sym_fw2a_scr
#define	SYM_FWB_SCR		sym_fw2b_scr
#define	SYM_FWZ_SCR		sym_fw2z_scr
#ifdef __FreeBSD__
#include <dev/sym/sym_fw2.h>
#else
#include "sym_fw2.h"
#endif
static struct sym_fwa_ofs sym_fw2a_ofs = {
	SYM_GEN_FW_A(struct SYM_FWA_SCR)
};
static struct sym_fwb_ofs sym_fw2b_ofs = {
	SYM_GEN_FW_B(struct SYM_FWB_SCR)
#ifdef SYM_OPT_HANDLE_DIR_UNKNOWN
	SYM_GEN_B(struct SYM_FWB_SCR, data_io)
#endif
	SYM_GEN_B(struct SYM_FWB_SCR, start64)
	SYM_GEN_B(struct SYM_FWB_SCR, pm_handle)
};
static struct sym_fwz_ofs sym_fw2z_ofs = {
	SYM_GEN_FW_Z(struct SYM_FWZ_SCR)
#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	SYM_GEN_Z(struct SYM_FWZ_SCR, start_ram)
	SYM_GEN_Z(struct SYM_FWZ_SCR, start_ram64)
#endif
};
#undef	SYM_FWA_SCR
#undef	SYM_FWB_SCR
#undef	SYM_FWZ_SCR

#undef	SYM_GEN_A
#undef	SYM_GEN_B
#undef	SYM_GEN_Z
#undef	PADDR_A
#undef	PADDR_B

#if	SYM_CONF_GENERIC_SUPPORT
/*
 *  Patch routine for firmware #1.
 */
static void
sym_fw1_patch(hcb_p np)
{
	struct sym_fw1a_scr *scripta0;
	struct sym_fw1b_scr *scriptb0;
#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	struct sym_fw1z_scr *scriptz0 = 
		(struct sym_fw1z_scr *) np->scriptz0;
#endif

	scripta0 = (struct sym_fw1a_scr *) np->scripta0;
	scriptb0 = (struct sym_fw1b_scr *) np->scriptb0;

#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	/*
	 *  Set up BUS physical address of SCRIPTS that is to 
	 *  be copied to on-chip RAM by the SCRIPTS processor.
	 */
	scriptz0->scripta0_ba[0]	= cpu_to_scr(vtobus(scripta0));
#endif

	/*
	 *  Remove LED support if not needed.
	 */
	if (!(np->features & FE_LED0)) {
		scripta0->idle[0]	= cpu_to_scr(SCR_NO_OP);
		scripta0->reselected[0]	= cpu_to_scr(SCR_NO_OP);
		scripta0->start[0]	= cpu_to_scr(SCR_NO_OP);
	}

#ifdef SYM_CONF_IARB_SUPPORT
	/*
	 *    If user does not want to use IMMEDIATE ARBITRATION
	 *    when we are reselected while attempting to arbitrate,
	 *    patch the SCRIPTS accordingly with a SCRIPT NO_OP.
	 */
	if (!SYM_CONF_SET_IARB_ON_ARB_LOST)
		scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP);
#endif
	/*
	 *  Patch some data in SCRIPTS.
	 *  - start and done queue initial bus address.
	 *  - target bus address table bus address.
	 */
	scriptb0->startpos[0]	= cpu_to_scr(np->squeue_ba);
	scriptb0->done_pos[0]	= cpu_to_scr(np->dqueue_ba);
	scriptb0->targtbl[0]	= cpu_to_scr(np->targtbl_ba);
}
#endif	/* SYM_CONF_GENERIC_SUPPORT */

/*
 *  Patch routine for firmware #2.
 */
static void
sym_fw2_patch(hcb_p np)
{
	struct sym_fw2a_scr *scripta0;
	struct sym_fw2b_scr *scriptb0;
#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	struct sym_fw2z_scr *scriptz0 = 
		(struct sym_fw2z_scr *) np->scriptz0;
#endif

	scripta0 = (struct sym_fw2a_scr *) np->scripta0;
	scriptb0 = (struct sym_fw2b_scr *) np->scriptb0;

#ifdef SYM_OPT_NO_BUS_MEMORY_MAPPING
	/*
	 *  Set up BUS physical address of SCRIPTS that is to 
	 *  be copied to on-chip RAM by the SCRIPTS processor.
	 */
	scriptz0->scripta0_ba64[0]	= /* Nothing is missing here */
	scriptz0->scripta0_ba[0]	= cpu_to_scr(vtobus(scripta0));
	scriptz0->scriptb0_ba64[0]	= cpu_to_scr(vtobus(scriptb0));
	scriptz0->ram_seg64[0]		= np->scr_ram_seg;
#endif

	/*
	 *  Remove LED support if not needed.
	 */
	if (!(np->features & FE_LED0)) {
		scripta0->idle[0]	= cpu_to_scr(SCR_NO_OP);
		scripta0->reselected[0]	= cpu_to_scr(SCR_NO_OP);
		scripta0->start[0]	= cpu_to_scr(SCR_NO_OP);
	}

#if   SYM_CONF_DMA_ADDRESSING_MODE == 2
	/*
	 *  Remove useless 64 bit DMA specific SCRIPTS, 
	 *  when this feature is not available.
	 */
	if (!np->use_dac) {
		scripta0->is_dmap_dirty[0] = cpu_to_scr(SCR_NO_OP);
		scripta0->is_dmap_dirty[1] = 0;
		scripta0->is_dmap_dirty[2] = cpu_to_scr(SCR_NO_OP);
		scripta0->is_dmap_dirty[3] = 0;
	}
#endif

#ifdef SYM_CONF_IARB_SUPPORT
	/*
	 *    If user does not want to use IMMEDIATE ARBITRATION
	 *    when we are reselected while attempting to arbitrate,
	 *    patch the SCRIPTS accordingly with a SCRIPT NO_OP.
	 */
	if (!SYM_CONF_SET_IARB_ON_ARB_LOST)
		scripta0->ungetjob[0] = cpu_to_scr(SCR_NO_OP);
#endif
	/*
	 *  Patch some variable in SCRIPTS.
	 *  - start and done queue initial bus address.
	 *  - target bus address table bus address.
	 */
	scriptb0->startpos[0]	= cpu_to_scr(np->squeue_ba);
	scriptb0->done_pos[0]	= cpu_to_scr(np->dqueue_ba);
	scriptb0->targtbl[0]	= cpu_to_scr(np->targtbl_ba);

	/*
	 *  Remove the load of SCNTL4 on reselection if not a C10.
	 */
	if (!(np->features & FE_C10)) {
		scripta0->resel_scntl4[0] = cpu_to_scr(SCR_NO_OP);
		scripta0->resel_scntl4[1] = cpu_to_scr(0);
	}

	/*
	 *  Remove a couple of work-arounds specific to C1010 if 
	 *  they are not desirable. See `sym_fw2.h' for more details.
	 */
	if (!(np->device_id == PCI_ID_LSI53C1010_2 &&
	      np->revision_id < 0x1 &&
	      np->pciclk_khz < 60000)) {
		scripta0->datao_phase[0] = cpu_to_scr(SCR_NO_OP);
		scripta0->datao_phase[1] = cpu_to_scr(0);
	}
	if (!(np->device_id == PCI_ID_LSI53C1010 &&
	      /* np->revision_id < 0xff */ 1)) {
		scripta0->sel_done[0] = cpu_to_scr(SCR_NO_OP);
		scripta0->sel_done[1] = cpu_to_scr(0);
	}

	/*
	 *  Patch some other variables in SCRIPTS.
	 *  These ones are loaded by the SCRIPTS processor.
	 */
	scriptb0->pm0_data_addr[0] =
		cpu_to_scr(np->scripta_ba + 
			   offsetof(struct sym_fw2a_scr, pm0_data));
	scriptb0->pm1_data_addr[0] =
		cpu_to_scr(np->scripta_ba + 
			   offsetof(struct sym_fw2a_scr, pm1_data));
}

/*
 *  Fill the data area in scripts.
 *  To be done for all firmwares.
 */
static void
sym_fw_fill_data (u32 *in, u32 *out)
{
	int	i;

	for (i = 0; i < SYM_CONF_MAX_SG; i++) {
		*in++  = SCR_CHMOV_TBL ^ SCR_DATA_IN;
		*in++  = offsetof (struct sym_dsb, data[i]);
		*out++ = SCR_CHMOV_TBL ^ SCR_DATA_OUT;