drivers/scsi/megaraid.c

377 	scb_t	*scb;
389 	 * allocate scb. We will return non-zero status in that case.
390 	 * NOTE: scb can be null even though certain commands completed
396 	scb = mega_build_cmd(adapter, scmd, &busy);
397 	if (!scb)
400 	scb->state |= SCB_PENDQ;
401 	list_add_tail(&scb->list, &adapter->pending_list);
431 	scb_t	*scb;
436 		scb = list_entry(head->next, scb_t, list);
440 		scb->state = SCB_ACTIVE;
441 		scb->cmd = cmd;
442 		scb->dma_type = MEGA_DMA_TYPE_NONE;
444 		return scb;
526 	scb_t	*scb;
644 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
649 			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
650 			scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
651 			scb->raw_mbox[3] = ldrv_num;
653 			scb->dma_direction = DMA_NONE;
655 			return scb;
692 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
696 			pthru = scb->pthru;
698 			mbox = (mbox_t *)scb->raw_mbox;
699 			memset(mbox, 0, sizeof(scb->raw_mbox));
717 			scb->dma_direction = DMA_FROM_DEVICE;
719 			pthru->numsgelements = mega_build_sglist(adapter, scb,
722 			mbox->m_out.xferaddr = scb->pthru_dma_addr;
724 			return scb;
734 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
738 			mbox = (mbox_t *)scb->raw_mbox;
740 			memset(mbox, 0, sizeof(scb->raw_mbox));
847 				scb->dma_direction = DMA_FROM_DEVICE;
850 				scb->dma_direction = DMA_TO_DEVICE;
854 			mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
857 			return scb;
874 			if(!(scb = mega_allocate_scb(adapter, cmd))) {
879 			scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
880 			scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
883 			scb->raw_mbox[3] = ldrv_num;
885 			scb->dma_direction = DMA_NONE;
887 			return scb;
902 		if(!(scb = mega_allocate_scb(adapter, cmd))) {
907 		mbox = (mbox_t *)scb->raw_mbox;
908 		memset(mbox, 0, sizeof(scb->raw_mbox));
912 			mega_prepare_extpassthru(adapter, scb, cmd,
917 			mbox->m_out.xferaddr = scb->epthru_dma_addr;
922 			pthru = mega_prepare_passthru(adapter, scb, cmd,
933 			mbox->m_out.xferaddr = scb->pthru_dma_addr;
936 		return scb;
945  * @scb: our scsi control block
953 mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
958 	pthru = scb->pthru;
979 	scb->dma_direction = DMA_BIDIRECTIONAL;
997 		pthru->numsgelements = mega_build_sglist(adapter, scb,
1008  * @scb: our scsi control block
1017 mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
1023 	epthru = scb->epthru;
1043 	scb->dma_direction = DMA_BIDIRECTIONAL;
1060 		epthru->numsgelements = mega_build_sglist(adapter, scb,
1071 	scb_t *scb;
1077 		scb = list_entry(pos, scb_t, list);
1079 		if( !(scb->state & SCB_ISSUED) ) {
1081 			if( issue_scb(adapter, scb) != 0 )
1093  * @scb: scsi control block
1096  * busy. We also take the scb from the pending list if the mailbox is
1100 issue_scb(adapter_t *adapter, scb_t *scb)
1116 	memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
1119 	mbox->m_out.cmdid = scb->idx;	/* Set cmdid */
1145 	scb->state |= SCB_ISSUED;
1176  * Issue a scb in synchronous and non-interrupt mode
1424 	scb_t	*scb;
1431 	 * and free the scb.
1445 			scb = &adapter->int_scb;
1447 			list_del_init(&scb->list);
1448 			scb->state = SCB_FREE;
1453 			scb = &adapter->scb_list[cmdid];
1458 			if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
1460 					"Id %d, scb->state:%x, scsi cmd:%p\n",
1461 					cmdid, scb->state, scb->cmd);
1469 			if( scb->state & SCB_ABORT ) {
1473 					scb->idx);
1475 				scb->cmd->result = (DID_ABORT << 16);
1477 				list_add_tail(SCSI_LIST(scb->cmd),
1480 				mega_free_scb(adapter, scb);
1488 			if( scb->state & SCB_RESET ) {
1492 					scb->idx);
1494 				scb->cmd->result = (DID_RESET << 16);
1496 				list_add_tail(SCSI_LIST(scb->cmd),
1499 				mega_free_scb (adapter, scb);
1504 			cmd = scb->cmd;
1505 			pthru = scb->pthru;
1506 			epthru = scb->epthru;
1507 			mbox = (mbox_t *)scb->raw_mbox;
1639 		mega_free_scb(adapter, scb);
1672  * Note: We assume the scsi commands associated with this scb is not free yet.
1675 mega_free_scb(adapter_t *adapter, scb_t *scb)
1677 	switch( scb->dma_type ) {
1683 		scsi_dma_unmap(scb->cmd);
1692 	list_del_init(&scb->list);
1694 	/* Link the scb back into free list */
1695 	scb->state = SCB_FREE;
1696 	scb->cmd = NULL;
1698 	list_add(&scb->list, &adapter->free_list);
1722 mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
1729 	cmd = scb->cmd;
1738 	scb->dma_type = MEGA_SGLIST;
1746 		scb->dma_h_bulkdata = sg_dma_address(sg);
1747 		*buf = (u32)scb->dma_h_bulkdata;
1754 			scb->sgl64[idx].address = sg_dma_address(sg);
1755 			*len += scb->sgl64[idx].length = sg_dma_len(sg);
1757 			scb->sgl[idx].address = sg_dma_address(sg);
1758 			*len += scb->sgl[idx].length = sg_dma_len(sg);
1763 	*buf = scb->sgl_dma_addr;
1813 	scb_t	*scb;
1818 		scb = &adapter->scb_list[i];
1820 		if( scb->sgl64 ) {
1823 					  scb->sgl64, scb->sgl_dma_addr);
1825 			scb->sgl64 = NULL;
1828 		if( scb->pthru ) {
1830 					  sizeof(mega_passthru), scb->pthru,
1831 					  scb->pthru_dma_addr);
1833 			scb->pthru = NULL;
1836 		if( scb->epthru ) {
1839 					  scb->epthru, scb->epthru_dma_addr);
1841 			scb->epthru = NULL;
1939 	scb_t			*scb;
1951 		scb = list_entry(pos, scb_t, list);
1953 		if (scb->cmd == cmd) { /* Found command */
1955 			scb->state |= aor;
1963 			if( scb->state & SCB_ISSUED ) {
1968 					scb->idx);
1981 					scb->idx);
1983 				mega_free_scb(adapter, scb);
2866  * Allocate memory for the various pointers in the scb structures:
2873 	scb_t	*scb;
2878 		scb = &adapter->scb_list[i];
2880 		scb->sgl64 = NULL;
2881 		scb->sgl = NULL;
2882 		scb->pthru = NULL;
2883 		scb->epthru = NULL;
2888 		scb = &adapter->scb_list[i];
2890 		scb->idx = i;
2892 		scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
2894 						&scb->sgl_dma_addr, GFP_KERNEL);
2896 		scb->sgl = (mega_sglist *)scb->sgl64;
2898 		if( !scb->sgl ) {
2904 		scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
2906 						&scb->pthru_dma_addr, GFP_KERNEL);
2908 		if( !scb->pthru ) {
2914 		scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
2916 						 &scb->epthru_dma_addr, GFP_KERNEL);
2918 		if( !scb->epthru ) {
2926 		scb->dma_type = MEGA_DMA_TYPE_NONE;
2933 		scb->state = SCB_FREE;
2934 		scb->cmd = NULL;
2935 		list_add(&scb->list, &adapter->free_list);
3794 	scb_t *scb;
3822 			scb = list_entry(pos, scb_t, list);
3823 			if (scb->pthru->logdrv < 0x80 )
3824 				scb->pthru->logdrv += 0x80;
4079 	scb_t	*scb;
4089 	scb = &adapter->int_scb;
4090 	memset(scb, 0, sizeof(scb_t));
4092 	scb->idx = CMDID_INT_CMDS;
4093 	scb->state |= SCB_ACTIVE | SCB_PENDQ;
4095 	memcpy(scb->raw_mbox, mc, sizeof(megacmd_t));
4101 		scb->pthru = pthru;
4104 	list_add_tail(&scb->list, &adapter->pending_list);