23  * 1. SCSI command is transformed to SCB (Spider Control Block) by the
25  * 2. The address of the SCB is stored in a list to be able to access it, if
27  * 3. The address of the SCB is written to the Controller, which loads the SCB
189 static void wd719x_finish_cmd(struct wd719x_scb *scb, int result)  in wd719x_finish_cmd()  argument
191 	struct scsi_cmnd *cmd = scb->cmd;  in wd719x_finish_cmd()
194 	list_del(&scb->list);  in wd719x_finish_cmd()
196 	dma_unmap_single(&wd->pdev->dev, scb->phys,  in wd719x_finish_cmd()
199 	dma_unmap_single(&wd->pdev->dev, scb->dma_handle,  in wd719x_finish_cmd()
206 /* Build a SCB and send it to the card */
211 	struct wd719x_scb *scb = scsi_cmd_priv(cmd);  in wd719x_queuecommand()  local
214 	scb->cmd = cmd;  in wd719x_queuecommand()
216 	scb->CDB_tag = 0;	/* Tagged queueing not supported yet */  in wd719x_queuecommand()
217 	scb->devid = cmd->device->id;  in wd719x_queuecommand()
218 	scb->lun = cmd->device->lun;  in wd719x_queuecommand()
221 	memcpy(scb->CDB, cmd->cmnd, cmd->cmd_len);  in wd719x_queuecommand()
223 	/* map SCB */  in wd719x_queuecommand()
224 	scb->phys = dma_map_single(&wd->pdev->dev, scb, sizeof(*scb),  in wd719x_queuecommand()
227 	if (dma_mapping_error(&wd->pdev->dev, scb->phys))  in wd719x_queuecommand()
231 	scb->sense_buf_length = SCSI_SENSE_BUFFERSIZE;  in wd719x_queuecommand()
232 	scb->dma_handle = dma_map_single(&wd->pdev->dev, cmd->sense_buffer,  in wd719x_queuecommand()
234 	if (dma_mapping_error(&wd->pdev->dev, scb->dma_handle))  in wd719x_queuecommand()
236 	scb->sense_buf = cpu_to_le32(scb->dma_handle);  in wd719x_queuecommand()
239 	scb->SCB_options |= WD719X_SCB_FLAGS_AUTO_REQUEST_SENSE;  in wd719x_queuecommand()
243 		scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION  in wd719x_queuecommand()
246 		scb->SCB_options |= WD719X_SCB_FLAGS_CHECK_DIRECTION;  in wd719x_queuecommand()
257 		scb->data_length = cpu_to_le32(count_sg *  in wd719x_queuecommand()
259 		scb->data_p = cpu_to_le32(scb->phys +  in wd719x_queuecommand()
263 			scb->sg_list[i].ptr = cpu_to_le32(sg_dma_address(sg));  in wd719x_queuecommand()
264 			scb->sg_list[i].length = cpu_to_le32(sg_dma_len(sg));  in wd719x_queuecommand()
266 		scb->SCB_options |= WD719X_SCB_FLAGS_DO_SCATTER_GATHER;  in wd719x_queuecommand()
268 		scb->data_length = 0;  in wd719x_queuecommand()
269 		scb->data_p = 0;  in wd719x_queuecommand()
280 	list_add(&scb->list, &wd->active_scbs);  in wd719x_queuecommand()
283 	wd719x_writel(wd, WD719X_AMR_SCB_IN, scb->phys);  in wd719x_queuecommand()
284 	/* send SCB opcode */  in wd719x_queuecommand()
291 	dma_unmap_single(&wd->pdev->dev, scb->dma_handle,  in wd719x_queuecommand()
294 	dma_unmap_single(&wd->pdev->dev, scb->phys, sizeof(*scb),  in wd719x_queuecommand()
467 	struct wd719x_scb *scb = scsi_cmd_priv(cmd);  in wd719x_abort()  local
478 				   scb->phys, 0);  in wd719x_abort()
479 	wd719x_finish_cmd(scb, DID_ABORT);  in wd719x_abort()
492 	struct wd719x_scb *scb, *tmp;  in wd719x_reset()  local
501 	list_for_each_entry_safe(scb, tmp, &wd->active_scbs, list) {  in wd719x_reset()
503 		    scb->cmd->device->id == device)  in wd719x_reset()
504 			wd719x_finish_cmd(scb, DID_RESET);  in wd719x_reset()
526 	struct wd719x_scb *scb, *tmp;  in wd719x_host_reset()  local
539 	list_for_each_entry_safe(scb, tmp, &wd->active_scbs, list)  in wd719x_host_reset()
540 		wd719x_finish_cmd(scb, DID_RESET);  in wd719x_host_reset()
562 /* process a SCB-completion interrupt */
565 					struct wd719x_scb *scb)  in wd719x_interrupt_SCB()  argument
579 		dev_err(&wd->pdev->dev, "SCB queue is full\n");  in wd719x_interrupt_SCB()
583 		dev_dbg(&wd->pdev->dev, "SCB terminated by direct command\n");  in wd719x_interrupt_SCB()
633 			scb->cmd->device->id);  in wd719x_interrupt_SCB()
655 	wd719x_finish_cmd(scb, result);  in wd719x_interrupt_SCB()
666 	/* read SCB pointer back from card */  in wd719x_interrupt()
685 		/* was the cmd completed a direct or SCB command? */  in wd719x_interrupt()
687 			struct wd719x_scb *scb;  in wd719x_interrupt()  local
688 			list_for_each_entry(scb, &wd->active_scbs, list)  in wd719x_interrupt()
689 				if (SCB_out == scb->phys)  in wd719x_interrupt()
691 			if (SCB_out == scb->phys)  in wd719x_interrupt()
692 				wd719x_interrupt_SCB(wd, regs, scb);  in wd719x_interrupt()
694 				dev_err(&wd->pdev->dev, "card returned invalid SCB pointer\n");  in wd719x_interrupt()