Commit db8d9b4c authored by Peter Ujfalusi's avatar Peter Ujfalusi Committed by Vinod Koul
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dmaengine: ti: k3-udma: Implement custom dbg_summary_show for debugfs 



With the custom dbg_summary_show the driver can show useful information
about the used channels.

dma0 (285c0000.dma-controller): number of channels: 24

dma1 (31150000.dma-controller): number of channels: 84
 dma1chan0    | 2b00000.mcasp:tx (MEM_TO_DEV, tchan16 [0x1010 -> 0xc400], PDMA[ ACC32 BURST ], TR mode)
 dma1chan1    | 2b00000.mcasp:rx (DEV_TO_MEM, rchan16 [0x4400 -> 0x9010], PDMA[ ACC32 BURST ], TR mode)
 dma1chan2    | 2ba0000.mcasp:tx (MEM_TO_DEV, tchan17 [0x1011 -> 0xc507], PDMA[ ACC32 BURST ], TR mode)
 dma1chan3    | 2ba0000.mcasp:rx (DEV_TO_MEM, rchan17 [0x4507 -> 0x9011], PDMA[ ACC32 BURST ], TR mode)
 dma1chan4    | in-use (MEM_TO_MEM, chan0 pair [0x1000 -> 0x9000], PSI-L Native, TR mode)
 dma1chan5    | in-use (MEM_TO_MEM, chan1 pair [0x1001 -> 0x9001], PSI-L Native, TR mode)
 dma1chan6    | in-use (MEM_TO_MEM, chan4 pair [0x1004 -> 0x9004], PSI-L Native, TR mode)
 dma1chan7    | in-use (MEM_TO_MEM, chan5 pair [0x1005 -> 0x9005], PSI-L Native, TR mode)

Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200306142839.17910-3-peter.ujfalusi@ti.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent e937cc1d

drivers/dma/ti/k3-udma.c

+63 −0
Original line number Original line Diff line number Diff line
@@ -3276,6 +3276,66 @@ static int udma_setup_resources(struct udma_dev *ud) 
	return ch_count;

	return ch_count;

}

}





#ifdef CONFIG_DEBUG_FS

static void udma_dbg_summary_show_chan(struct seq_file *s,

				       struct dma_chan *chan)

{

	struct udma_chan *uc = to_udma_chan(chan);

	struct udma_chan_config *ucc = &uc->config;



	seq_printf(s, " %-13s| %s", dma_chan_name(chan),

		   chan->dbg_client_name ?: "in-use");

	seq_printf(s, " (%s, ", dmaengine_get_direction_text(uc->config.dir));



	switch (uc->config.dir) {

	case DMA_MEM_TO_MEM:

		seq_printf(s, "chan%d pair [0x%04x -> 0x%04x], ", uc->tchan->id,

			   ucc->src_thread, ucc->dst_thread);

		break;

	case DMA_DEV_TO_MEM:

		seq_printf(s, "rchan%d [0x%04x -> 0x%04x], ", uc->rchan->id,

			   ucc->src_thread, ucc->dst_thread);

		break;

	case DMA_MEM_TO_DEV:

		seq_printf(s, "tchan%d [0x%04x -> 0x%04x], ", uc->tchan->id,

			   ucc->src_thread, ucc->dst_thread);

		break;

	default:

		seq_printf(s, ")\n");

		return;

	}



	if (ucc->ep_type == PSIL_EP_NATIVE) {

		seq_printf(s, "PSI-L Native");

		if (ucc->metadata_size) {

			seq_printf(s, "[%s", ucc->needs_epib ? " EPIB" : "");

			if (ucc->psd_size)

				seq_printf(s, " PSDsize:%u", ucc->psd_size);

			seq_printf(s, " ]");

		}

	} else {

		seq_printf(s, "PDMA");

		if (ucc->enable_acc32 || ucc->enable_burst)

			seq_printf(s, "[%s%s ]",

				   ucc->enable_acc32 ? " ACC32" : "",

				   ucc->enable_burst ? " BURST" : "");

	}



	seq_printf(s, ", %s)\n", ucc->pkt_mode ? "Packet mode" : "TR mode");

}



static void udma_dbg_summary_show(struct seq_file *s,

				  struct dma_device *dma_dev)

{

	struct dma_chan *chan;



	list_for_each_entry(chan, &dma_dev->channels, device_node) {

		if (chan->client_count)

			udma_dbg_summary_show_chan(s, chan);

	}

}

#endif /* CONFIG_DEBUG_FS */



#define TI_UDMAC_BUSWIDTHS	(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \

#define TI_UDMAC_BUSWIDTHS	(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \

				 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \

				 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \

				 BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \

				 BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
@@ -3362,6 +3422,9 @@ static int udma_probe(struct platform_device *pdev) 
	ud->ddev.device_resume = udma_resume;

	ud->ddev.device_resume = udma_resume;

	ud->ddev.device_terminate_all = udma_terminate_all;

	ud->ddev.device_terminate_all = udma_terminate_all;

	ud->ddev.device_synchronize = udma_synchronize;

	ud->ddev.device_synchronize = udma_synchronize;

#ifdef CONFIG_DEBUG_FS

	ud->ddev.dbg_summary_show = udma_dbg_summary_show;

#endif





	ud->ddev.device_free_chan_resources = udma_free_chan_resources;

	ud->ddev.device_free_chan_resources = udma_free_chan_resources;

	ud->ddev.src_addr_widths = TI_UDMAC_BUSWIDTHS;

	ud->ddev.src_addr_widths = TI_UDMAC_BUSWIDTHS;

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