ips.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 1,776 行 · 第 1/5 页

ips_intr_morpheus(ips_ha_t * ha)
{
	ips_stat_t *sp;
	ips_scb_t *scb;
	IPS_STATUS cstatus;
	int intrstatus;

	METHOD_TRACE("ips_intr_morpheus", 2);

	if (!ha)
		return 0;

	if (!ha->active)
		return 0;

	intrstatus = (*ha->func.isintr) (ha);

	if (!intrstatus) {
		/*
		 * Unexpected/Shared interrupt
		 */

		return 0;
	}

	while (TRUE) {
		sp = &ha->sp;

		intrstatus = (*ha->func.isintr) (ha);

		if (!intrstatus)
			break;
		else
			cstatus.value = (*ha->func.statupd) (ha);

		if (cstatus.value == 0xffffffff)
			/* No more to process */
			break;

		if (cstatus.fields.command_id > (IPS_MAX_CMDS - 1)) {
			IPS_PRINTK(KERN_WARNING, ha->pcidev,
				   "Spurious interrupt; no ccb.\n");

			continue;
		}

		ips_chkstatus(ha, &cstatus);
		scb = (ips_scb_t *) sp->scb_addr;

		/*
		 * use the callback function to finish things up
		 * NOTE: interrupts are OFF for this
		 */
		(*scb->callback) (ha, scb);
	}			/* end while */
	return 1;
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_info                                                   */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Return info about the driver                                           */
/*                                                                          */
/****************************************************************************/
const char *
ips_info(struct Scsi_Host *SH)
{
	static char buffer[256];
	char *bp;
	ips_ha_t *ha;

	METHOD_TRACE("ips_info", 1);

	ha = IPS_HA(SH);

	if (!ha)
		return (NULL);

	bp = &buffer[0];
	memset(bp, 0, sizeof (buffer));

	sprintf(bp, "%s%s%s Build %d", "IBM PCI ServeRAID ",
		IPS_VERSION_HIGH, IPS_VERSION_LOW, IPS_BUILD_IDENT);

	if (ha->ad_type > 0 && ha->ad_type <= MAX_ADAPTER_NAME) {
		strcat(bp, " <");
		strcat(bp, ips_adapter_name[ha->ad_type - 1]);
		strcat(bp, ">");
	}

	return (bp);
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_proc_info                                              */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   The passthru interface for the driver                                  */
/*                                                                          */
/****************************************************************************/
int
ips_proc_info(struct Scsi_Host *host, char *buffer, char **start, off_t offset,
	      int length, int func)
{
	int i;
	int ret;
	ips_ha_t *ha = NULL;

	METHOD_TRACE("ips_proc_info", 1);

	/* Find our host structure */
	for (i = 0; i < ips_next_controller; i++) {
		if (ips_sh[i]) {
			if (ips_sh[i] == host) {
				ha = (ips_ha_t *) ips_sh[i]->hostdata;
				break;
			}
		}
	}

	if (!ha)
		return (-EINVAL);

	if (func) {
		/* write */
		return (0);
	} else {
		/* read */
		if (start)
			*start = buffer;

		ret = ips_host_info(ha, buffer, offset, length);

		return (ret);
	}
}

/*--------------------------------------------------------------------------*/
/* Helper Functions                                                         */
/*--------------------------------------------------------------------------*/

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_is_passthru                                            */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Determine if the specified SCSI command is really a passthru command   */
/*                                                                          */
/****************************************************************************/
static int
ips_is_passthru(Scsi_Cmnd * SC)
{
	METHOD_TRACE("ips_is_passthru", 1);

	if (!SC)
		return (0);

	if ((SC->cmnd[0] == IPS_IOCTL_COMMAND) &&
	    (SC->device->channel == 0) &&
	    (SC->device->id == IPS_ADAPTER_ID) &&
	    (SC->device->lun == 0) && SC->request_buffer) {
		if ((!SC->use_sg) && SC->request_bufflen &&
		    (((char *) SC->request_buffer)[0] == 'C') &&
		    (((char *) SC->request_buffer)[1] == 'O') &&
		    (((char *) SC->request_buffer)[2] == 'P') &&
		    (((char *) SC->request_buffer)[3] == 'P'))
			return 1;
		else if (SC->use_sg) {
			struct scatterlist *sg = SC->request_buffer;
			char *buffer = IPS_SG_ADDRESS(sg);
			if (buffer && buffer[0] == 'C' && buffer[1] == 'O' &&
			    buffer[2] == 'P' && buffer[3] == 'P')
				return 1;
		}
	}
	return 0;
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_alloc_passthru_buffer                                  */
/*                                                                          */
/* Routine Description:                                                     */
/*   allocate a buffer large enough for the ioctl data if the ioctl buffer  */
/*   is too small or doesn't exist                                          */
/****************************************************************************/
static int
ips_alloc_passthru_buffer(ips_ha_t * ha, int length)
{
	void *bigger_buf;
	dma_addr_t dma_busaddr;

	if (ha->ioctl_data && length <= ha->ioctl_len)
		return 0;
	/* there is no buffer or it's not big enough, allocate a new one */
	bigger_buf = pci_alloc_consistent(ha->pcidev, length, &dma_busaddr);
	if (bigger_buf) {
		/* free the old memory */
		pci_free_consistent(ha->pcidev, ha->ioctl_len, ha->ioctl_data,
				    ha->ioctl_busaddr);
		/* use the new memory */
		ha->ioctl_data = (char *) bigger_buf;
		ha->ioctl_len = length;
		ha->ioctl_busaddr = dma_busaddr;
	} else {
		return -1;
	}
	return 0;
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_make_passthru                                          */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Make a passthru command out of the info in the Scsi block              */
/*                                                                          */
/****************************************************************************/
static int
ips_make_passthru(ips_ha_t * ha, Scsi_Cmnd * SC, ips_scb_t * scb, int intr)
{
	ips_passthru_t *pt;
	int length = 0;
	int ret;

	METHOD_TRACE("ips_make_passthru", 1);

	if (!SC->use_sg) {
		length = SC->request_bufflen;
	} else {
		struct scatterlist *sg = SC->request_buffer;
		int i;
		for (i = 0; i < SC->use_sg; i++)
			length += sg[i].length;
	}
	if (length < sizeof (ips_passthru_t)) {
		/* wrong size */
		DEBUG_VAR(1, "(%s%d) Passthru structure wrong size",
			  ips_name, ha->host_num);
		return (IPS_FAILURE);
	}
	if (ips_alloc_passthru_buffer(ha, length)) {
		/* allocation failure!  If ha->ioctl_data exists, use it to return
		   some error codes.  Return a failed command to the scsi layer. */
		if (ha->ioctl_data) {
			pt = (ips_passthru_t *) ha->ioctl_data;
			ips_scmd_buf_read(SC, pt, sizeof (ips_passthru_t));
			pt->BasicStatus = 0x0B;
			pt->ExtendedStatus = 0x00;
			ips_scmd_buf_write(SC, pt, sizeof (ips_passthru_t));
		}
		return IPS_FAILURE;
	}
	ha->ioctl_datasize = length;

	ips_scmd_buf_read(SC, ha->ioctl_data, ha->ioctl_datasize);
	pt = (ips_passthru_t *) ha->ioctl_data;

	/*
	 * Some notes about the passthru interface used
	 *
	 * IF the scsi op_code == 0x0d then we assume
	 * that the data came along with/goes with the
	 * packet we received from the sg driver. In this
	 * case the CmdBSize field of the pt structure is
	 * used for the size of the buffer.
	 */

	switch (pt->CoppCmd) {
	case IPS_NUMCTRLS:
		memcpy(ha->ioctl_data + sizeof (ips_passthru_t),
		       &ips_num_controllers, sizeof (int));
		ips_scmd_buf_write(SC, ha->ioctl_data,
				   sizeof (ips_passthru_t) + sizeof (int));
		SC->result = DID_OK << 16;

		return (IPS_SUCCESS_IMM);

	case IPS_COPPUSRCMD:
	case IPS_COPPIOCCMD:
		if (SC->cmnd[0] == IPS_IOCTL_COMMAND) {
			if (length < (sizeof (ips_passthru_t) + pt->CmdBSize)) {
				/* wrong size */
				DEBUG_VAR(1,
					  "(%s%d) Passthru structure wrong size",
					  ips_name, ha->host_num);

				return (IPS_FAILURE);
			}

			if (ha->device_id == IPS_DEVICEID_COPPERHEAD &&
			    pt->CoppCP.cmd.flashfw.op_code ==
			    IPS_CMD_RW_BIOSFW) {
				ret = ips_flash_copperhead(ha, pt, scb);
				ips_scmd_buf_write(SC, ha->ioctl_data,
						   sizeof (ips_passthru_t));
				return ret;
			}
			if (ips_usrcmd(ha, pt, scb))
				return (IPS_SUCCESS);
			else
				return (IPS_FAILURE);
		}

		break;

	}			/* end switch */

	return (IPS_FAILURE);
}

/****************************************************************************/
/* Routine Name: ips_flash_copperhead                                       */
/* Routine Description:                                                     */
/*   Flash the BIOS/FW on a Copperhead style controller                     */
/****************************************************************************/
static int
ips_flash_copperhead(ips_ha_t * ha, ips_passthru_t * pt, ips_scb_t * scb)
{
	int datasize;

	/* Trombone is the only copperhead that can do packet flash, but only
	 * for firmware. No one said it had to make sence. */
	if (IPS_IS_TROMBONE(ha) && pt->CoppCP.cmd.flashfw.type == IPS_FW_IMAGE) {
		if (ips_usrcmd(ha, pt, scb))
			return IPS_SUCCESS;
		else
			return IPS_FAILURE;
	}
	pt->BasicStatus = 0x0B;
	pt->ExtendedStatus = 0;
	scb->scsi_cmd->result = DID_OK << 16;
	/* IF it's OK to Use the "CD BOOT" Flash Buffer, then you can     */
	/* avoid allocating a huge buffer per adapter ( which can fail ). */
	if (pt->CoppCP.cmd.flashfw.type == IPS_BIOS_IMAGE &&
	    pt->CoppCP.cmd.flashfw.direction == IPS_ERASE_BIOS) {
		pt->BasicStatus = 0;
		return ips_flash_bios(ha, pt, scb);
	} else if (pt->CoppCP.cmd.flashfw.packet_num == 0) {
		if (ips_FlashData && !test_and_set_bit(0, &ips_FlashDataInUse)){
			ha->flash_data = ips_FlashData;
			ha->flash_busaddr = ips_flashbusaddr;
			ha->flash_len = PAGE_SIZE << 7;
			ha->flash_datasize = 0;
		} else if (!ha->fla