Lines Matching +full:dma +full:- +full:channel
1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/dma-direction.h>
109 struct knav_dma_device *dma; member
118 unsigned channel, flow; member
124 #define chan_number(ch) ((ch->direction == DMA_MEM_TO_DEV) ? \
125 ch->channel : ch->flow)
138 if (!memcmp(&chan->cfg, cfg, sizeof(*cfg))) in check_config()
149 spin_lock(&chan->lock); in chan_start()
150 if ((chan->direction == DMA_MEM_TO_DEV) && chan->reg_chan) { in chan_start()
151 if (cfg->u.tx.filt_pswords) in chan_start()
153 if (cfg->u.tx.filt_einfo) in chan_start()
155 writel_relaxed(v, &chan->reg_chan->mode); in chan_start()
156 writel_relaxed(DMA_ENABLE, &chan->reg_chan->control); in chan_start()
159 if (chan->reg_tx_sched) in chan_start()
160 writel_relaxed(cfg->u.tx.priority, &chan->reg_tx_sched->prio); in chan_start()
162 if (chan->reg_rx_flow) { in chan_start()
165 if (cfg->u.rx.einfo_present) in chan_start()
167 if (cfg->u.rx.psinfo_present) in chan_start()
169 if (cfg->u.rx.err_mode == DMA_RETRY) in chan_start()
171 v |= (cfg->u.rx.desc_type & DESC_TYPE_MASK) << DESC_TYPE_SHIFT; in chan_start()
172 if (cfg->u.rx.psinfo_at_sop) in chan_start()
174 v |= (cfg->u.rx.sop_offset & CHAN_SOP_OFF_MASK) in chan_start()
176 v |= cfg->u.rx.dst_q & CHAN_QNUM_MASK; in chan_start()
178 writel_relaxed(v, &chan->reg_rx_flow->control); in chan_start()
179 writel_relaxed(0, &chan->reg_rx_flow->tags); in chan_start()
180 writel_relaxed(0, &chan->reg_rx_flow->tag_sel); in chan_start()
182 v = cfg->u.rx.fdq[0] << 16; in chan_start()
183 v |= cfg->u.rx.fdq[1] & CHAN_QNUM_MASK; in chan_start()
184 writel_relaxed(v, &chan->reg_rx_flow->fdq_sel[0]); in chan_start()
186 v = cfg->u.rx.fdq[2] << 16; in chan_start()
187 v |= cfg->u.rx.fdq[3] & CHAN_QNUM_MASK; in chan_start()
188 writel_relaxed(v, &chan->reg_rx_flow->fdq_sel[1]); in chan_start()
190 writel_relaxed(0, &chan->reg_rx_flow->thresh[0]); in chan_start()
191 writel_relaxed(0, &chan->reg_rx_flow->thresh[1]); in chan_start()
192 writel_relaxed(0, &chan->reg_rx_flow->thresh[2]); in chan_start()
196 memcpy(&chan->cfg, cfg, sizeof(*cfg)); in chan_start()
197 spin_unlock(&chan->lock); in chan_start()
206 if (!chan->reg_chan) in chan_teardown()
210 writel_relaxed(DMA_TEARDOWN, &chan->reg_chan->control); in chan_teardown()
212 /* wait for the dma to shut itself down */ in chan_teardown()
215 value = readl_relaxed(&chan->reg_chan->control); in chan_teardown()
220 if (readl_relaxed(&chan->reg_chan->control) & DMA_ENABLE) { in chan_teardown()
221 dev_err(kdev->dev, "timeout waiting for teardown\n"); in chan_teardown()
222 return -ETIMEDOUT; in chan_teardown()
230 spin_lock(&chan->lock); in chan_stop()
231 if (chan->reg_rx_flow) { in chan_stop()
233 writel_relaxed(0, &chan->reg_rx_flow->fdq_sel[0]); in chan_stop()
234 writel_relaxed(0, &chan->reg_rx_flow->fdq_sel[1]); in chan_stop()
235 writel_relaxed(0, &chan->reg_rx_flow->thresh[0]); in chan_stop()
236 writel_relaxed(0, &chan->reg_rx_flow->thresh[1]); in chan_stop()
237 writel_relaxed(0, &chan->reg_rx_flow->thresh[2]); in chan_stop()
240 /* teardown the dma channel */ in chan_stop()
244 if (chan->reg_rx_flow) { in chan_stop()
245 writel_relaxed(0, &chan->reg_rx_flow->control); in chan_stop()
246 writel_relaxed(0, &chan->reg_rx_flow->tags); in chan_stop()
247 writel_relaxed(0, &chan->reg_rx_flow->tag_sel); in chan_stop()
250 memset(&chan->cfg, 0, sizeof(struct knav_dma_cfg)); in chan_stop()
251 spin_unlock(&chan->lock); in chan_stop()
253 dev_dbg(kdev->dev, "channel stopped\n"); in chan_stop()
256 static void dma_hw_enable_all(struct knav_dma_device *dma) in dma_hw_enable_all() argument
260 for (i = 0; i < dma->max_tx_chan; i++) { in dma_hw_enable_all()
261 writel_relaxed(0, &dma->reg_tx_chan[i].mode); in dma_hw_enable_all()
262 writel_relaxed(DMA_ENABLE, &dma->reg_tx_chan[i].control); in dma_hw_enable_all()
267 static void knav_dma_hw_init(struct knav_dma_device *dma) in knav_dma_hw_init() argument
272 spin_lock(&dma->lock); in knav_dma_hw_init()
273 v = dma->loopback ? DMA_LOOPBACK : 0; in knav_dma_hw_init()
274 writel_relaxed(v, &dma->reg_global->emulation_control); in knav_dma_hw_init()
276 v = readl_relaxed(&dma->reg_global->perf_control); in knav_dma_hw_init()
277 v |= ((dma->rx_timeout & DMA_RX_TIMEOUT_MASK) << DMA_RX_TIMEOUT_SHIFT); in knav_dma_hw_init()
278 writel_relaxed(v, &dma->reg_global->perf_control); in knav_dma_hw_init()
280 v = ((dma->tx_priority << DMA_TX_PRIO_SHIFT) | in knav_dma_hw_init()
281 (dma->rx_priority << DMA_RX_PRIO_SHIFT)); in knav_dma_hw_init()
283 writel_relaxed(v, &dma->reg_global->priority_control); in knav_dma_hw_init()
286 for (i = 0; i < dma->max_rx_chan; i++) in knav_dma_hw_init()
287 writel_relaxed(DMA_ENABLE, &dma->reg_rx_chan[i].control); in knav_dma_hw_init()
289 for (i = 0; i < dma->logical_queue_managers; i++) in knav_dma_hw_init()
290 writel_relaxed(dma->qm_base_address[i], in knav_dma_hw_init()
291 &dma->reg_global->qm_base_address[i]); in knav_dma_hw_init()
292 spin_unlock(&dma->lock); in knav_dma_hw_init()
295 static void knav_dma_hw_destroy(struct knav_dma_device *dma) in knav_dma_hw_destroy() argument
300 spin_lock(&dma->lock); in knav_dma_hw_destroy()
303 for (i = 0; i < dma->max_rx_chan; i++) in knav_dma_hw_destroy()
304 writel_relaxed(v, &dma->reg_rx_chan[i].control); in knav_dma_hw_destroy()
306 for (i = 0; i < dma->max_tx_chan; i++) in knav_dma_hw_destroy()
307 writel_relaxed(v, &dma->reg_tx_chan[i].control); in knav_dma_hw_destroy()
308 spin_unlock(&dma->lock); in knav_dma_hw_destroy()
317 ((chan->direction == DMA_MEM_TO_DEV) ? "tx chan" : "rx flow"), in dma_debug_show_channels()
320 if (chan->direction == DMA_MEM_TO_DEV) { in dma_debug_show_channels()
321 seq_printf(s, "einfo - %d, pswords - %d, priority - %d\n", in dma_debug_show_channels()
322 chan->cfg.u.tx.filt_einfo, in dma_debug_show_channels()
323 chan->cfg.u.tx.filt_pswords, in dma_debug_show_channels()
324 chan->cfg.u.tx.priority); in dma_debug_show_channels()
326 seq_printf(s, "einfo - %d, psinfo - %d, desc_type - %d\n", in dma_debug_show_channels()
327 chan->cfg.u.rx.einfo_present, in dma_debug_show_channels()
328 chan->cfg.u.rx.psinfo_present, in dma_debug_show_channels()
329 chan->cfg.u.rx.desc_type); in dma_debug_show_channels()
331 chan->cfg.u.rx.dst_q, in dma_debug_show_channels()
332 chan->cfg.u.rx.thresh); in dma_debug_show_channels()
334 seq_printf(s, "[%d]", chan->cfg.u.rx.fdq[i]); in dma_debug_show_channels()
340 struct knav_dma_device *dma) in dma_debug_show_devices() argument
344 list_for_each_entry(chan, &dma->chan_list, list) { in dma_debug_show_devices()
345 if (atomic_read(&chan->ref_count)) in dma_debug_show_devices()
352 struct knav_dma_device *dma; in knav_dma_debug_show() local
354 list_for_each_entry(dma, &kdev->list, list) { in knav_dma_debug_show()
355 if (atomic_read(&dma->ref_count)) { in knav_dma_debug_show()
357 dma->name, dma->max_tx_chan, dma->max_rx_flow); in knav_dma_debug_show()
358 dma_debug_show_devices(s, dma); in knav_dma_debug_show()
374 dma_node = of_parse_phandle(np, "ti,navigator-dmas", 0); in of_channel_match_helper()
376 return -ENODEV; in of_channel_match_helper()
378 *dma_instance = dma_node->name; in of_channel_match_helper()
379 index = of_property_match_string(np, "ti,navigator-dma-names", name); in of_channel_match_helper()
381 dev_err(kdev->dev, "No 'ti,navigator-dma-names' property\n"); in of_channel_match_helper()
382 return -ENODEV; in of_channel_match_helper()
385 if (of_parse_phandle_with_fixed_args(np, "ti,navigator-dmas", in of_channel_match_helper()
387 dev_err(kdev->dev, "Missing the phandle args name %s\n", name); in of_channel_match_helper()
388 return -ENODEV; in of_channel_match_helper()
392 dev_err(kdev->dev, "Missing args for %s\n", name); in of_channel_match_helper()
393 return -ENODEV; in of_channel_match_helper()
400 * knav_dma_open_channel() - try to setup an exclusive slave channel
402 * @name: slave channel name
403 * @config: dma configuration parameters
405 * Return: Pointer to appropriate DMA channel on success or NULL on error.
410 struct knav_dma_device *dma = NULL, *iter1; in knav_dma_open_channel() local
412 int chan_num = -1; in knav_dma_open_channel()
416 pr_err("keystone-navigator-dma driver not registered\n"); in knav_dma_open_channel()
420 chan_num = of_channel_match_helper(dev->of_node, name, &instance); in knav_dma_open_channel()
422 dev_err(kdev->dev, "No DMA instance with name %s\n", name); in knav_dma_open_channel()
426 dev_dbg(kdev->dev, "initializing %s channel %d from DMA %s\n", in knav_dma_open_channel()
427 config->direction == DMA_MEM_TO_DEV ? "transmit" : in knav_dma_open_channel()
428 config->direction == DMA_DEV_TO_MEM ? "receive" : in knav_dma_open_channel()
431 if (config->direction != DMA_MEM_TO_DEV && in knav_dma_open_channel()
432 config->direction != DMA_DEV_TO_MEM) { in knav_dma_open_channel()
433 dev_err(kdev->dev, "bad direction\n"); in knav_dma_open_channel()
437 /* Look for correct dma instance */ in knav_dma_open_channel()
438 list_for_each_entry(iter1, &kdev->list, list) { in knav_dma_open_channel()
439 if (!strcmp(iter1->name, instance)) { in knav_dma_open_channel()
440 dma = iter1; in knav_dma_open_channel()
444 if (!dma) { in knav_dma_open_channel()
445 dev_err(kdev->dev, "No DMA instance with name %s\n", instance); in knav_dma_open_channel()
449 /* Look for correct dma channel from dma instance */ in knav_dma_open_channel()
450 list_for_each_entry(iter2, &dma->chan_list, list) { in knav_dma_open_channel()
451 if (config->direction == DMA_MEM_TO_DEV) { in knav_dma_open_channel()
452 if (iter2->channel == chan_num) { in knav_dma_open_channel()
457 if (iter2->flow == chan_num) { in knav_dma_open_channel()
464 dev_err(kdev->dev, "channel %d is not in DMA %s\n", in knav_dma_open_channel()
469 if (atomic_read(&chan->ref_count) >= 1) { in knav_dma_open_channel()
471 dev_err(kdev->dev, "channel %d config miss-match\n", in knav_dma_open_channel()
477 if (atomic_inc_return(&chan->dma->ref_count) <= 1) in knav_dma_open_channel()
478 knav_dma_hw_init(chan->dma); in knav_dma_open_channel()
480 if (atomic_inc_return(&chan->ref_count) <= 1) in knav_dma_open_channel()
483 dev_dbg(kdev->dev, "channel %d opened from DMA %s\n", in knav_dma_open_channel()
491 * knav_dma_close_channel() - Destroy a dma channel
493 * @channel: dma channel handle
496 void knav_dma_close_channel(void *channel) in knav_dma_close_channel() argument
498 struct knav_dma_chan *chan = channel; in knav_dma_close_channel()
501 pr_err("keystone-navigator-dma driver not registered\n"); in knav_dma_close_channel()
505 if (atomic_dec_return(&chan->ref_count) <= 0) in knav_dma_close_channel()
508 if (atomic_dec_return(&chan->dma->ref_count) <= 0) in knav_dma_close_channel()
509 knav_dma_hw_destroy(chan->dma); in knav_dma_close_channel()
511 dev_dbg(kdev->dev, "channel %d or flow %d closed from DMA %s\n", in knav_dma_close_channel()
512 chan->channel, chan->flow, chan->dma->name); in knav_dma_close_channel()
516 static void __iomem *pktdma_get_regs(struct knav_dma_device *dma, in pktdma_get_regs() argument
520 struct device *dev = kdev->dev; in pktdma_get_regs()
532 regs = devm_ioremap_resource(kdev->dev, &res); in pktdma_get_regs()
544 struct knav_dma_device *dma = chan->dma; in pktdma_init_rx_chan() local
546 chan->flow = flow; in pktdma_init_rx_chan()
547 chan->reg_rx_flow = dma->reg_rx_flow + flow; in pktdma_init_rx_chan()
548 chan->channel = DMA_INVALID_ID; in pktdma_init_rx_chan()
549 dev_dbg(kdev->dev, "rx flow(%d) (%p)\n", chan->flow, chan->reg_rx_flow); in pktdma_init_rx_chan()
554 static int pktdma_init_tx_chan(struct knav_dma_chan *chan, u32 channel) in pktdma_init_tx_chan() argument
556 struct knav_dma_device *dma = chan->dma; in pktdma_init_tx_chan() local
558 chan->channel = channel; in pktdma_init_tx_chan()
559 chan->reg_chan = dma->reg_tx_chan + channel; in pktdma_init_tx_chan()
560 chan->reg_tx_sched = dma->reg_tx_sched + channel; in pktdma_init_tx_chan()
561 chan->flow = DMA_INVALID_ID; in pktdma_init_tx_chan()
562 dev_dbg(kdev->dev, "tx channel(%d) (%p)\n", chan->channel, chan->reg_chan); in pktdma_init_tx_chan()
567 static int pktdma_init_chan(struct knav_dma_device *dma, in pktdma_init_chan() argument
571 struct device *dev = kdev->dev; in pktdma_init_chan()
573 int ret = -EINVAL; in pktdma_init_chan()
577 return -ENOMEM; in pktdma_init_chan()
579 INIT_LIST_HEAD(&chan->list); in pktdma_init_chan()
580 chan->dma = dma; in pktdma_init_chan()
581 chan->direction = DMA_TRANS_NONE; in pktdma_init_chan()
582 atomic_set(&chan->ref_count, 0); in pktdma_init_chan()
583 spin_lock_init(&chan->lock); in pktdma_init_chan()
586 chan->direction = dir; in pktdma_init_chan()
589 chan->direction = dir; in pktdma_init_chan()
592 dev_err(dev, "channel(%d) direction unknown\n", chan_num); in pktdma_init_chan()
595 list_add_tail(&chan->list, &dma->chan_list); in pktdma_init_chan()
604 struct knav_dma_device *dma; in dma_init() local
610 dma = devm_kzalloc(kdev->dev, sizeof(*dma), GFP_KERNEL); in dma_init()
611 if (!dma) { in dma_init()
612 dev_err(kdev->dev, "could not allocate driver mem\n"); in dma_init()
613 return -ENOMEM; in dma_init()
615 INIT_LIST_HEAD(&dma->list); in dma_init()
616 INIT_LIST_HEAD(&dma->chan_list); in dma_init()
618 ret = of_property_read_variable_u32_array(cloud, "ti,navigator-cloud-address", in dma_init()
619 dma->qm_base_address, 1, DMA_MAX_QMS); in dma_init()
621 dev_err(kdev->dev, "invalid navigator cloud addresses\n"); in dma_init()
622 return -ENODEV; in dma_init()
624 dma->logical_queue_managers = ret; in dma_init()
626 dma->reg_global = pktdma_get_regs(dma, node, 0, &size); in dma_init()
627 if (IS_ERR(dma->reg_global)) in dma_init()
628 return PTR_ERR(dma->reg_global); in dma_init()
630 dev_err(kdev->dev, "bad size %pa for global regs\n", &size); in dma_init()
631 return -ENODEV; in dma_init()
634 dma->reg_tx_chan = pktdma_get_regs(dma, node, 1, &size); in dma_init()
635 if (IS_ERR(dma->reg_tx_chan)) in dma_init()
636 return PTR_ERR(dma->reg_tx_chan); in dma_init()
639 dma->reg_rx_chan = pktdma_get_regs(dma, node, 2, &size); in dma_init()
640 if (IS_ERR(dma->reg_rx_chan)) in dma_init()
641 return PTR_ERR(dma->reg_rx_chan); in dma_init()
644 dma->reg_tx_sched = pktdma_get_regs(dma, node, 3, &size); in dma_init()
645 if (IS_ERR(dma->reg_tx_sched)) in dma_init()
646 return PTR_ERR(dma->reg_tx_sched); in dma_init()
649 dma->reg_rx_flow = pktdma_get_regs(dma, node, 4, &size); in dma_init()
650 if (IS_ERR(dma->reg_rx_flow)) in dma_init()
651 return PTR_ERR(dma->reg_rx_flow); in dma_init()
654 dma->rx_priority = DMA_PRIO_DEFAULT; in dma_init()
655 dma->tx_priority = DMA_PRIO_DEFAULT; in dma_init()
657 dma->enable_all = of_property_read_bool(node, "ti,enable-all"); in dma_init()
658 dma->loopback = of_property_read_bool(node, "ti,loop-back"); in dma_init()
660 ret = of_property_read_u32(node, "ti,rx-retry-timeout", &timeout); in dma_init()
662 dev_dbg(kdev->dev, "unspecified rx timeout using value %d\n", in dma_init()
667 dma->rx_timeout = timeout; in dma_init()
668 dma->max_rx_chan = max_rx_chan; in dma_init()
669 dma->max_rx_flow = max_rx_flow; in dma_init()
670 dma->max_tx_chan = min(max_tx_chan, max_tx_sched); in dma_init()
671 atomic_set(&dma->ref_count, 0); in dma_init()
672 strcpy(dma->name, node->name); in dma_init()
673 spin_lock_init(&dma->lock); in dma_init()
675 for (i = 0; i < dma->max_tx_chan; i++) { in dma_init()
676 if (pktdma_init_chan(dma, DMA_MEM_TO_DEV, i) >= 0) in dma_init()
680 for (i = 0; i < dma->max_rx_flow; i++) { in dma_init()
681 if (pktdma_init_chan(dma, DMA_DEV_TO_MEM, i) >= 0) in dma_init()
685 list_add_tail(&dma->list, &kdev->list); in dma_init()
689 * the DMA hardware resources. in dma_init()
691 if (dma->enable_all) { in dma_init()
692 atomic_inc(&dma->ref_count); in dma_init()
693 knav_dma_hw_init(dma); in dma_init()
694 dma_hw_enable_all(dma); in dma_init()
697 …dev_info(kdev->dev, "DMA %s registered %d logical channels, flows %d, tx chans: %d, rx chans: %d%s… in dma_init()
698 dma->name, num_chan, dma->max_rx_flow, in dma_init()
699 dma->max_tx_chan, dma->max_rx_chan, in dma_init()
700 dma->loopback ? ", loopback" : ""); in dma_init()
707 struct device *dev = &pdev->dev; in knav_dma_probe()
708 struct device_node *node = pdev->dev.of_node; in knav_dma_probe()
713 dev_err(&pdev->dev, "could not find device info\n"); in knav_dma_probe()
714 return -EINVAL; in knav_dma_probe()
721 return -ENOMEM; in knav_dma_probe()
724 kdev->dev = dev; in knav_dma_probe()
725 INIT_LIST_HEAD(&kdev->list); in knav_dma_probe()
727 pm_runtime_enable(kdev->dev); in knav_dma_probe()
728 ret = pm_runtime_resume_and_get(kdev->dev); in knav_dma_probe()
730 dev_err(kdev->dev, "unable to enable pktdma, err %d\n", ret); in knav_dma_probe()
739 dev_err(&pdev->dev, "init failed with %d\n", ret); in knav_dma_probe()
744 if (list_empty(&kdev->list)) { in knav_dma_probe()
745 dev_err(dev, "no valid dma instance\n"); in knav_dma_probe()
746 ret = -ENODEV; in knav_dma_probe()
757 pm_runtime_put_sync(kdev->dev); in knav_dma_probe()
759 pm_runtime_disable(kdev->dev); in knav_dma_probe()
766 struct knav_dma_device *dma; in knav_dma_remove() local
768 list_for_each_entry(dma, &kdev->list, list) { in knav_dma_remove()
769 if (atomic_dec_return(&dma->ref_count) == 0) in knav_dma_remove()
770 knav_dma_hw_destroy(dma); in knav_dma_remove()
773 pm_runtime_put_sync(&pdev->dev); in knav_dma_remove()
774 pm_runtime_disable(&pdev->dev); in knav_dma_remove()
778 { .compatible = "ti,keystone-navigator-dma", },
788 .name = "keystone-navigator-dma",
795 MODULE_DESCRIPTION("TI Keystone Navigator Packet DMA driver");