Lines Matching refs:pd_chan
159 struct pch_dma_desc *pdc_first_active(struct pch_dma_chan *pd_chan) in pdc_first_active() argument
161 return list_first_entry(&pd_chan->active_list, in pdc_first_active()
166 struct pch_dma_desc *pdc_first_queued(struct pch_dma_chan *pd_chan) in pdc_first_queued() argument
168 return list_first_entry(&pd_chan->queue, in pdc_first_queued()
198 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pdc_set_dir() local
212 if (pd_chan->dir == DMA_MEM_TO_DEV) in pdc_set_dir()
230 if (pd_chan->dir == DMA_MEM_TO_DEV) in pdc_set_dir()
278 static u32 pdc_get_status0(struct pch_dma_chan *pd_chan) in pdc_get_status0() argument
280 struct pch_dma *pd = to_pd(pd_chan->chan.device); in pdc_get_status0()
285 DMA_STATUS_BITS_PER_CH * pd_chan->chan.chan_id)); in pdc_get_status0()
288 static u32 pdc_get_status2(struct pch_dma_chan *pd_chan) in pdc_get_status2() argument
290 struct pch_dma *pd = to_pd(pd_chan->chan.device); in pdc_get_status2()
295 DMA_STATUS_BITS_PER_CH * (pd_chan->chan.chan_id - 8))); in pdc_get_status2()
298 static bool pdc_is_idle(struct pch_dma_chan *pd_chan) in pdc_is_idle() argument
302 if (pd_chan->chan.chan_id < 8) in pdc_is_idle()
303 sts = pdc_get_status0(pd_chan); in pdc_is_idle()
305 sts = pdc_get_status2(pd_chan); in pdc_is_idle()
314 static void pdc_dostart(struct pch_dma_chan *pd_chan, struct pch_dma_desc* desc) in pdc_dostart() argument
316 if (!pdc_is_idle(pd_chan)) { in pdc_dostart()
317 dev_err(chan2dev(&pd_chan->chan), in pdc_dostart()
322 dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> dev_addr: %x\n", in pdc_dostart()
323 pd_chan->chan.chan_id, desc->regs.dev_addr); in pdc_dostart()
324 dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> mem_addr: %x\n", in pdc_dostart()
325 pd_chan->chan.chan_id, desc->regs.mem_addr); in pdc_dostart()
326 dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> size: %x\n", in pdc_dostart()
327 pd_chan->chan.chan_id, desc->regs.size); in pdc_dostart()
328 dev_dbg(chan2dev(&pd_chan->chan), "chan %d -> next: %x\n", in pdc_dostart()
329 pd_chan->chan.chan_id, desc->regs.next); in pdc_dostart()
332 channel_writel(pd_chan, DEV_ADDR, desc->regs.dev_addr); in pdc_dostart()
333 channel_writel(pd_chan, MEM_ADDR, desc->regs.mem_addr); in pdc_dostart()
334 channel_writel(pd_chan, SIZE, desc->regs.size); in pdc_dostart()
335 channel_writel(pd_chan, NEXT, desc->regs.next); in pdc_dostart()
336 pdc_set_mode(&pd_chan->chan, DMA_CTL0_ONESHOT); in pdc_dostart()
338 channel_writel(pd_chan, NEXT, desc->txd.phys); in pdc_dostart()
339 pdc_set_mode(&pd_chan->chan, DMA_CTL0_SG); in pdc_dostart()
343 static void pdc_chain_complete(struct pch_dma_chan *pd_chan, in pdc_chain_complete() argument
350 list_splice_init(&desc->tx_list, &pd_chan->free_list); in pdc_chain_complete()
351 list_move(&desc->desc_node, &pd_chan->free_list); in pdc_chain_complete()
356 static void pdc_complete_all(struct pch_dma_chan *pd_chan) in pdc_complete_all() argument
361 BUG_ON(!pdc_is_idle(pd_chan)); in pdc_complete_all()
363 if (!list_empty(&pd_chan->queue)) in pdc_complete_all()
364 pdc_dostart(pd_chan, pdc_first_queued(pd_chan)); in pdc_complete_all()
366 list_splice_init(&pd_chan->active_list, &list); in pdc_complete_all()
367 list_splice_init(&pd_chan->queue, &pd_chan->active_list); in pdc_complete_all()
370 pdc_chain_complete(pd_chan, desc); in pdc_complete_all()
373 static void pdc_handle_error(struct pch_dma_chan *pd_chan) in pdc_handle_error() argument
377 bad_desc = pdc_first_active(pd_chan); in pdc_handle_error()
380 list_splice_init(&pd_chan->queue, pd_chan->active_list.prev); in pdc_handle_error()
382 if (!list_empty(&pd_chan->active_list)) in pdc_handle_error()
383 pdc_dostart(pd_chan, pdc_first_active(pd_chan)); in pdc_handle_error()
385 dev_crit(chan2dev(&pd_chan->chan), "Bad descriptor submitted\n"); in pdc_handle_error()
386 dev_crit(chan2dev(&pd_chan->chan), "descriptor cookie: %d\n", in pdc_handle_error()
389 pdc_chain_complete(pd_chan, bad_desc); in pdc_handle_error()
392 static void pdc_advance_work(struct pch_dma_chan *pd_chan) in pdc_advance_work() argument
394 if (list_empty(&pd_chan->active_list) || in pdc_advance_work()
395 list_is_singular(&pd_chan->active_list)) { in pdc_advance_work()
396 pdc_complete_all(pd_chan); in pdc_advance_work()
398 pdc_chain_complete(pd_chan, pdc_first_active(pd_chan)); in pdc_advance_work()
399 pdc_dostart(pd_chan, pdc_first_active(pd_chan)); in pdc_advance_work()
406 struct pch_dma_chan *pd_chan = to_pd_chan(txd->chan); in pd_tx_submit() local
408 spin_lock(&pd_chan->lock); in pd_tx_submit()
410 if (list_empty(&pd_chan->active_list)) { in pd_tx_submit()
411 list_add_tail(&desc->desc_node, &pd_chan->active_list); in pd_tx_submit()
412 pdc_dostart(pd_chan, desc); in pd_tx_submit()
414 list_add_tail(&desc->desc_node, &pd_chan->queue); in pd_tx_submit()
417 spin_unlock(&pd_chan->lock); in pd_tx_submit()
439 static struct pch_dma_desc *pdc_desc_get(struct pch_dma_chan *pd_chan) in pdc_desc_get() argument
445 spin_lock(&pd_chan->lock); in pdc_desc_get()
446 list_for_each_entry_safe(desc, _d, &pd_chan->free_list, desc_node) { in pdc_desc_get()
453 dev_dbg(chan2dev(&pd_chan->chan), "desc %p not ACKed\n", desc); in pdc_desc_get()
455 spin_unlock(&pd_chan->lock); in pdc_desc_get()
456 dev_dbg(chan2dev(&pd_chan->chan), "scanned %d descriptors\n", i); in pdc_desc_get()
459 ret = pdc_alloc_desc(&pd_chan->chan, GFP_ATOMIC); in pdc_desc_get()
461 spin_lock(&pd_chan->lock); in pdc_desc_get()
462 pd_chan->descs_allocated++; in pdc_desc_get()
463 spin_unlock(&pd_chan->lock); in pdc_desc_get()
465 dev_err(chan2dev(&pd_chan->chan), in pdc_desc_get()
473 static void pdc_desc_put(struct pch_dma_chan *pd_chan, in pdc_desc_put() argument
477 spin_lock(&pd_chan->lock); in pdc_desc_put()
478 list_splice_init(&desc->tx_list, &pd_chan->free_list); in pdc_desc_put()
479 list_add(&desc->desc_node, &pd_chan->free_list); in pdc_desc_put()
480 spin_unlock(&pd_chan->lock); in pdc_desc_put()
486 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pd_alloc_chan_resources() local
491 if (!pdc_is_idle(pd_chan)) { in pd_alloc_chan_resources()
496 if (!list_empty(&pd_chan->free_list)) in pd_alloc_chan_resources()
497 return pd_chan->descs_allocated; in pd_alloc_chan_resources()
511 spin_lock_irq(&pd_chan->lock); in pd_alloc_chan_resources()
512 list_splice(&tmp_list, &pd_chan->free_list); in pd_alloc_chan_resources()
513 pd_chan->descs_allocated = i; in pd_alloc_chan_resources()
515 spin_unlock_irq(&pd_chan->lock); in pd_alloc_chan_resources()
519 return pd_chan->descs_allocated; in pd_alloc_chan_resources()
524 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pd_free_chan_resources() local
529 BUG_ON(!pdc_is_idle(pd_chan)); in pd_free_chan_resources()
530 BUG_ON(!list_empty(&pd_chan->active_list)); in pd_free_chan_resources()
531 BUG_ON(!list_empty(&pd_chan->queue)); in pd_free_chan_resources()
533 spin_lock_irq(&pd_chan->lock); in pd_free_chan_resources()
534 list_splice_init(&pd_chan->free_list, &tmp_list); in pd_free_chan_resources()
535 pd_chan->descs_allocated = 0; in pd_free_chan_resources()
536 spin_unlock_irq(&pd_chan->lock); in pd_free_chan_resources()
552 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pd_issue_pending() local
554 if (pdc_is_idle(pd_chan)) { in pd_issue_pending()
555 spin_lock(&pd_chan->lock); in pd_issue_pending()
556 pdc_advance_work(pd_chan); in pd_issue_pending()
557 spin_unlock(&pd_chan->lock); in pd_issue_pending()
566 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pd_prep_slave_sg() local
587 pd_chan->dir = direction; in pd_prep_slave_sg()
591 desc = pdc_desc_get(pd_chan); in pd_prep_slave_sg()
643 pdc_desc_put(pd_chan, first); in pd_prep_slave_sg()
649 struct pch_dma_chan *pd_chan = to_pd_chan(chan); in pd_device_terminate_all() local
653 spin_lock_irq(&pd_chan->lock); in pd_device_terminate_all()
655 pdc_set_mode(&pd_chan->chan, DMA_CTL0_DISABLE); in pd_device_terminate_all()
657 list_splice_init(&pd_chan->active_list, &list); in pd_device_terminate_all()
658 list_splice_init(&pd_chan->queue, &list); in pd_device_terminate_all()
661 pdc_chain_complete(pd_chan, desc); in pd_device_terminate_all()
663 spin_unlock_irq(&pd_chan->lock); in pd_device_terminate_all()
670 struct pch_dma_chan *pd_chan = from_tasklet(pd_chan, t, tasklet); in pdc_tasklet() local
673 if (!pdc_is_idle(pd_chan)) { in pdc_tasklet()
674 dev_err(chan2dev(&pd_chan->chan), in pdc_tasklet()
679 spin_lock_irqsave(&pd_chan->lock, flags); in pdc_tasklet()
680 if (test_and_clear_bit(0, &pd_chan->err_status)) in pdc_tasklet()
681 pdc_handle_error(pd_chan); in pdc_tasklet()
683 pdc_advance_work(pd_chan); in pdc_tasklet()
684 spin_unlock_irqrestore(&pd_chan->lock, flags); in pdc_tasklet()
690 struct pch_dma_chan *pd_chan; in pd_irq() local
703 pd_chan = &pd->channels[i]; in pd_irq()
708 set_bit(0, &pd_chan->err_status); in pd_irq()
710 tasklet_schedule(&pd_chan->tasklet); in pd_irq()
716 set_bit(0, &pd_chan->err_status); in pd_irq()
718 tasklet_schedule(&pd_chan->tasklet); in pd_irq()
735 struct pch_dma_chan *pd_chan; in pch_dma_save_regs() local
745 pd_chan = to_pd_chan(chan); in pch_dma_save_regs()
747 pd->ch_regs[i].dev_addr = channel_readl(pd_chan, DEV_ADDR); in pch_dma_save_regs()
748 pd->ch_regs[i].mem_addr = channel_readl(pd_chan, MEM_ADDR); in pch_dma_save_regs()
749 pd->ch_regs[i].size = channel_readl(pd_chan, SIZE); in pch_dma_save_regs()
750 pd->ch_regs[i].next = channel_readl(pd_chan, NEXT); in pch_dma_save_regs()
758 struct pch_dma_chan *pd_chan; in pch_dma_restore_regs() local
768 pd_chan = to_pd_chan(chan); in pch_dma_restore_regs()
770 channel_writel(pd_chan, DEV_ADDR, pd->ch_regs[i].dev_addr); in pch_dma_restore_regs()
771 channel_writel(pd_chan, MEM_ADDR, pd->ch_regs[i].mem_addr); in pch_dma_restore_regs()
772 channel_writel(pd_chan, SIZE, pd->ch_regs[i].size); in pch_dma_restore_regs()
773 channel_writel(pd_chan, NEXT, pd->ch_regs[i].next); in pch_dma_restore_regs()
867 struct pch_dma_chan *pd_chan = &pd->channels[i]; in pch_dma_probe() local
869 pd_chan->chan.device = &pd->dma; in pch_dma_probe()
870 dma_cookie_init(&pd_chan->chan); in pch_dma_probe()
872 pd_chan->membase = ®s->desc[i]; in pch_dma_probe()
874 spin_lock_init(&pd_chan->lock); in pch_dma_probe()
876 INIT_LIST_HEAD(&pd_chan->active_list); in pch_dma_probe()
877 INIT_LIST_HEAD(&pd_chan->queue); in pch_dma_probe()
878 INIT_LIST_HEAD(&pd_chan->free_list); in pch_dma_probe()
880 tasklet_setup(&pd_chan->tasklet, pdc_tasklet); in pch_dma_probe()
881 list_add_tail(&pd_chan->chan.device_node, &pd->dma.channels); in pch_dma_probe()
921 struct pch_dma_chan *pd_chan; in pch_dma_remove() local
931 pd_chan = to_pd_chan(chan); in pch_dma_remove()
933 tasklet_kill(&pd_chan->tasklet); in pch_dma_remove()