222 static inline bool imxdma_chan_is_doing_cyclic(struct imxdma_channel *imxdmac)  in imxdma_chan_is_doing_cyclic()  argument
226 	if (!list_empty(&imxdmac->ld_active)) {  in imxdma_chan_is_doing_cyclic()
227 		desc = list_first_entry(&imxdmac->ld_active, struct imxdma_desc,  in imxdma_chan_is_doing_cyclic()
248 static int imxdma_hw_chain(struct imxdma_channel *imxdmac)  in imxdma_hw_chain()  argument
250 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_hw_chain()
253 		return imxdmac->hw_chaining;  in imxdma_hw_chain()
263 	struct imxdma_channel *imxdmac = to_imxdma_chan(d->desc.chan);  in imxdma_sg_next()  local
264 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_sg_next()
274 				 DMA_DAR(imxdmac->channel));  in imxdma_sg_next()
277 				 DMA_SAR(imxdmac->channel));  in imxdma_sg_next()
279 	imx_dmav1_writel(imxdma, now, DMA_CNTR(imxdmac->channel));  in imxdma_sg_next()
282 		"size 0x%08x\n", __func__, imxdmac->channel,  in imxdma_sg_next()
283 		 imx_dmav1_readl(imxdma, DMA_DAR(imxdmac->channel)),  in imxdma_sg_next()
284 		 imx_dmav1_readl(imxdma, DMA_SAR(imxdmac->channel)),  in imxdma_sg_next()
285 		 imx_dmav1_readl(imxdma, DMA_CNTR(imxdmac->channel)));  in imxdma_sg_next()
290 	struct imxdma_channel *imxdmac = to_imxdma_chan(d->desc.chan);  in imxdma_enable_hw()  local
291 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_enable_hw()
292 	int channel = imxdmac->channel;  in imxdma_enable_hw()
306 			d->sg && imxdma_hw_chain(imxdmac)) {  in imxdma_enable_hw()
320 static void imxdma_disable_hw(struct imxdma_channel *imxdmac)  in imxdma_disable_hw()  argument
322 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_disable_hw()
323 	int channel = imxdmac->channel;  in imxdma_disable_hw()
328 	if (imxdma_hw_chain(imxdmac))  in imxdma_disable_hw()
329 		del_timer(&imxdmac->watchdog);  in imxdma_disable_hw()
342 	struct imxdma_channel *imxdmac = from_timer(imxdmac, t, watchdog);  in imxdma_watchdog()  local
343 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_watchdog()
344 	int channel = imxdmac->channel;  in imxdma_watchdog()
349 	tasklet_schedule(&imxdmac->dma_tasklet);  in imxdma_watchdog()
351 		imxdmac->channel);  in imxdma_watchdog()
407 static void dma_irq_handle_channel(struct imxdma_channel *imxdmac)  in dma_irq_handle_channel()  argument
409 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in dma_irq_handle_channel()
410 	int chno = imxdmac->channel;  in dma_irq_handle_channel()
415 	if (list_empty(&imxdmac->ld_active)) {  in dma_irq_handle_channel()
420 	desc = list_first_entry(&imxdmac->ld_active,  in dma_irq_handle_channel()
434 			if (imxdma_hw_chain(imxdmac)) {  in dma_irq_handle_channel()
438 				mod_timer(&imxdmac->watchdog,  in dma_irq_handle_channel()
451 			if (imxdma_chan_is_doing_cyclic(imxdmac))  in dma_irq_handle_channel()
453 				tasklet_schedule(&imxdmac->dma_tasklet);  in dma_irq_handle_channel()
458 		if (imxdma_hw_chain(imxdmac)) {  in dma_irq_handle_channel()
459 			del_timer(&imxdmac->watchdog);  in dma_irq_handle_channel()
467 	tasklet_schedule(&imxdmac->dma_tasklet);  in dma_irq_handle_channel()
493 	struct imxdma_channel *imxdmac = to_imxdma_chan(d->desc.chan);  in imxdma_xfer_desc()  local
494 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_xfer_desc()
519 		imxdmac->slot_2d = slot;  in imxdma_xfer_desc()
520 		imxdmac->enabled_2d = true;  in imxdma_xfer_desc()
541 		imx_dmav1_writel(imxdma, d->src, DMA_SAR(imxdmac->channel));  in imxdma_xfer_desc()
542 		imx_dmav1_writel(imxdma, d->dest, DMA_DAR(imxdmac->channel));  in imxdma_xfer_desc()
544 			 DMA_CCR(imxdmac->channel));  in imxdma_xfer_desc()
546 		imx_dmav1_writel(imxdma, d->len, DMA_CNTR(imxdmac->channel));  in imxdma_xfer_desc()
550 			__func__, imxdmac->channel,  in imxdma_xfer_desc()
559 			imx_dmav1_writel(imxdma, imxdmac->per_address,  in imxdma_xfer_desc()
560 					 DMA_SAR(imxdmac->channel));  in imxdma_xfer_desc()
561 			imx_dmav1_writel(imxdma, imxdmac->ccr_from_device,  in imxdma_xfer_desc()
562 					 DMA_CCR(imxdmac->channel));  in imxdma_xfer_desc()
566 				__func__, imxdmac->channel,  in imxdma_xfer_desc()
568 				(unsigned long long)imxdmac->per_address);  in imxdma_xfer_desc()
570 			imx_dmav1_writel(imxdma, imxdmac->per_address,  in imxdma_xfer_desc()
571 					 DMA_DAR(imxdmac->channel));  in imxdma_xfer_desc()
572 			imx_dmav1_writel(imxdma, imxdmac->ccr_to_device,  in imxdma_xfer_desc()
573 					 DMA_CCR(imxdmac->channel));  in imxdma_xfer_desc()
577 				__func__, imxdmac->channel,  in imxdma_xfer_desc()
579 				(unsigned long long)imxdmac->per_address);  in imxdma_xfer_desc()
582 				__func__, imxdmac->channel);  in imxdma_xfer_desc()
598 	struct imxdma_channel *imxdmac = from_tasklet(imxdmac, t, dma_tasklet);  in imxdma_tasklet()  local
599 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_tasklet()
605 	if (list_empty(&imxdmac->ld_active)) {  in imxdma_tasklet()
610 	desc = list_first_entry(&imxdmac->ld_active, struct imxdma_desc, node);  in imxdma_tasklet()
616 	if (imxdma_chan_is_doing_cyclic(imxdmac))  in imxdma_tasklet()
622 	if (imxdmac->enabled_2d) {  in imxdma_tasklet()
623 		imxdma->slots_2d[imxdmac->slot_2d].count--;  in imxdma_tasklet()
624 		imxdmac->enabled_2d = false;  in imxdma_tasklet()
627 	list_move_tail(imxdmac->ld_active.next, &imxdmac->ld_free);  in imxdma_tasklet()
629 	if (!list_empty(&imxdmac->ld_queue)) {  in imxdma_tasklet()
630 		next_desc = list_first_entry(&imxdmac->ld_queue,  in imxdma_tasklet()
632 		list_move_tail(imxdmac->ld_queue.next, &imxdmac->ld_active);  in imxdma_tasklet()
635 				 __func__, imxdmac->channel);  in imxdma_tasklet()
645 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_terminate_all()  local
646 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_terminate_all()
649 	imxdma_disable_hw(imxdmac);  in imxdma_terminate_all()
652 	list_splice_tail_init(&imxdmac->ld_active, &imxdmac->ld_free);  in imxdma_terminate_all()
653 	list_splice_tail_init(&imxdmac->ld_queue, &imxdmac->ld_free);  in imxdma_terminate_all()
662 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_config_write()  local
663 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_config_write()
667 		imxdmac->per_address = dmaengine_cfg->src_addr;  in imxdma_config_write()
668 		imxdmac->watermark_level = dmaengine_cfg->src_maxburst;  in imxdma_config_write()
669 		imxdmac->word_size = dmaengine_cfg->src_addr_width;  in imxdma_config_write()
671 		imxdmac->per_address = dmaengine_cfg->dst_addr;  in imxdma_config_write()
672 		imxdmac->watermark_level = dmaengine_cfg->dst_maxburst;  in imxdma_config_write()
673 		imxdmac->word_size = dmaengine_cfg->dst_addr_width;  in imxdma_config_write()
676 	switch (imxdmac->word_size) {  in imxdma_config_write()
689 	imxdmac->hw_chaining = 0;  in imxdma_config_write()
691 	imxdmac->ccr_from_device = (mode | IMX_DMA_TYPE_FIFO) |  in imxdma_config_write()
694 	imxdmac->ccr_to_device =  in imxdma_config_write()
697 	imx_dmav1_writel(imxdma, imxdmac->dma_request,  in imxdma_config_write()
698 			 DMA_RSSR(imxdmac->channel));  in imxdma_config_write()
701 	imx_dmav1_writel(imxdma, imxdmac->watermark_level *  in imxdma_config_write()
702 			 imxdmac->word_size, DMA_BLR(imxdmac->channel));  in imxdma_config_write()
710 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_config()  local
712 	memcpy(&imxdmac->config, dmaengine_cfg, sizeof(*dmaengine_cfg));  in imxdma_config()
726 	struct imxdma_channel *imxdmac = to_imxdma_chan(tx->chan);  in imxdma_tx_submit()  local
727 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_tx_submit()
732 	list_move_tail(imxdmac->ld_free.next, &imxdmac->ld_queue);  in imxdma_tx_submit()
741 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_alloc_chan_resources()  local
745 		imxdmac->dma_request = data->dma_request;  in imxdma_alloc_chan_resources()
747 	while (imxdmac->descs_allocated < IMXDMA_MAX_CHAN_DESCRIPTORS) {  in imxdma_alloc_chan_resources()
760 		list_add_tail(&desc->node, &imxdmac->ld_free);  in imxdma_alloc_chan_resources()
761 		imxdmac->descs_allocated++;  in imxdma_alloc_chan_resources()
764 	if (!imxdmac->descs_allocated)  in imxdma_alloc_chan_resources()
767 	return imxdmac->descs_allocated;  in imxdma_alloc_chan_resources()
772 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_free_chan_resources()  local
773 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_free_chan_resources()
779 	imxdma_disable_hw(imxdmac);  in imxdma_free_chan_resources()
780 	list_splice_tail_init(&imxdmac->ld_active, &imxdmac->ld_free);  in imxdma_free_chan_resources()
781 	list_splice_tail_init(&imxdmac->ld_queue, &imxdmac->ld_free);  in imxdma_free_chan_resources()
785 	list_for_each_entry_safe(desc, _desc, &imxdmac->ld_free, node) {  in imxdma_free_chan_resources()
787 		imxdmac->descs_allocated--;  in imxdma_free_chan_resources()
789 	INIT_LIST_HEAD(&imxdmac->ld_free);  in imxdma_free_chan_resources()
791 	kfree(imxdmac->sg_list);  in imxdma_free_chan_resources()
792 	imxdmac->sg_list = NULL;  in imxdma_free_chan_resources()
800 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_prep_slave_sg()  local
805 	if (list_empty(&imxdmac->ld_free) ||  in imxdma_prep_slave_sg()
806 	    imxdma_chan_is_doing_cyclic(imxdmac))  in imxdma_prep_slave_sg()
809 	desc = list_first_entry(&imxdmac->ld_free, struct imxdma_desc, node);  in imxdma_prep_slave_sg()
815 	imxdma_config_write(chan, &imxdmac->config, direction);  in imxdma_prep_slave_sg()
817 	switch (imxdmac->word_size) {  in imxdma_prep_slave_sg()
838 		desc->src = imxdmac->per_address;  in imxdma_prep_slave_sg()
840 		desc->dest = imxdmac->per_address;  in imxdma_prep_slave_sg()
853 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_prep_dma_cyclic()  local
854 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_prep_dma_cyclic()
860 			__func__, imxdmac->channel, buf_len, period_len);  in imxdma_prep_dma_cyclic()
862 	if (list_empty(&imxdmac->ld_free) ||  in imxdma_prep_dma_cyclic()
863 	    imxdma_chan_is_doing_cyclic(imxdmac))  in imxdma_prep_dma_cyclic()
866 	desc = list_first_entry(&imxdmac->ld_free, struct imxdma_desc, node);  in imxdma_prep_dma_cyclic()
868 	kfree(imxdmac->sg_list);  in imxdma_prep_dma_cyclic()
870 	imxdmac->sg_list = kcalloc(periods + 1,  in imxdma_prep_dma_cyclic()
872 	if (!imxdmac->sg_list)  in imxdma_prep_dma_cyclic()
875 	sg_init_table(imxdmac->sg_list, periods);  in imxdma_prep_dma_cyclic()
878 		sg_assign_page(&imxdmac->sg_list[i], NULL);  in imxdma_prep_dma_cyclic()
879 		imxdmac->sg_list[i].offset = 0;  in imxdma_prep_dma_cyclic()
880 		imxdmac->sg_list[i].dma_address = dma_addr;  in imxdma_prep_dma_cyclic()
881 		sg_dma_len(&imxdmac->sg_list[i]) = period_len;  in imxdma_prep_dma_cyclic()
886 	sg_chain(imxdmac->sg_list, periods + 1, imxdmac->sg_list);  in imxdma_prep_dma_cyclic()
889 	desc->sg = imxdmac->sg_list;  in imxdma_prep_dma_cyclic()
894 		desc->src = imxdmac->per_address;  in imxdma_prep_dma_cyclic()
896 		desc->dest = imxdmac->per_address;  in imxdma_prep_dma_cyclic()
901 	imxdma_config_write(chan, &imxdmac->config, direction);  in imxdma_prep_dma_cyclic()
910 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_prep_dma_memcpy()  local
911 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_prep_dma_memcpy()
915 		__func__, imxdmac->channel, (unsigned long long)src,  in imxdma_prep_dma_memcpy()
918 	if (list_empty(&imxdmac->ld_free) ||  in imxdma_prep_dma_memcpy()
919 	    imxdma_chan_is_doing_cyclic(imxdmac))  in imxdma_prep_dma_memcpy()
922 	desc = list_first_entry(&imxdmac->ld_free, struct imxdma_desc, node);  in imxdma_prep_dma_memcpy()
941 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_prep_dma_interleaved()  local
942 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_prep_dma_interleaved()
947 		imxdmac->channel, (unsigned long long)xt->src_start,  in imxdma_prep_dma_interleaved()
952 	if (list_empty(&imxdmac->ld_free) ||  in imxdma_prep_dma_interleaved()
953 	    imxdma_chan_is_doing_cyclic(imxdmac))  in imxdma_prep_dma_interleaved()
959 	desc = list_first_entry(&imxdmac->ld_free, struct imxdma_desc, node);  in imxdma_prep_dma_interleaved()
983 	struct imxdma_channel *imxdmac = to_imxdma_chan(chan);  in imxdma_issue_pending()  local
984 	struct imxdma_engine *imxdma = imxdmac->imxdma;  in imxdma_issue_pending()
989 	if (list_empty(&imxdmac->ld_active) &&  in imxdma_issue_pending()
990 	    !list_empty(&imxdmac->ld_queue)) {  in imxdma_issue_pending()
991 		desc = list_first_entry(&imxdmac->ld_queue,  in imxdma_issue_pending()
997 				 __func__, imxdmac->channel);  in imxdma_issue_pending()
999 			list_move_tail(imxdmac->ld_queue.next,  in imxdma_issue_pending()
1000 				       &imxdmac->ld_active);  in imxdma_issue_pending()
1127 		struct imxdma_channel *imxdmac = &imxdma->channel[i];  in imxdma_probe()  local
1139 			imxdmac->irq = irq + i;  in imxdma_probe()
1140 			timer_setup(&imxdmac->watchdog, imxdma_watchdog, 0);  in imxdma_probe()
1143 		imxdmac->imxdma = imxdma;  in imxdma_probe()
1145 		INIT_LIST_HEAD(&imxdmac->ld_queue);  in imxdma_probe()
1146 		INIT_LIST_HEAD(&imxdmac->ld_free);  in imxdma_probe()
1147 		INIT_LIST_HEAD(&imxdmac->ld_active);  in imxdma_probe()
1149 		tasklet_setup(&imxdmac->dma_tasklet, imxdma_tasklet);  in imxdma_probe()
1150 		imxdmac->chan.device = &imxdma->dma_device;  in imxdma_probe()
1151 		dma_cookie_init(&imxdmac->chan);  in imxdma_probe()
1152 		imxdmac->channel = i;  in imxdma_probe()
1155 		list_add_tail(&imxdmac->chan.device_node,  in imxdma_probe()
1213 		struct imxdma_channel *imxdmac = &imxdma->channel[i];  in imxdma_free_irq()  local
1216 			disable_irq(imxdmac->irq);  in imxdma_free_irq()
1218 		tasklet_kill(&imxdmac->dma_tasklet);  in imxdma_free_irq()