linux-kernel - Re: [PATCH v3 07/12] dma: edma: Add function to dump a PaRAM set from PaRAM

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Date:	Mon, 12 Aug 2013 11:22:36 +0530
From:	Sekhar Nori <nsekhar@...com>
To:	Joel Fernandes <joelf@...com>
CC:	Tony Lindgren <tony@...mide.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Sricharan R <r.sricharan@...com>,
	Rajendra Nayak <rnayak@...com>,
	Lokesh Vutla <lokeshvutla@...com>,
	Matt Porter <matt@...orter.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Vinod Koul <vinod.koul@...el.com>, Dan Williams <djbw@...com>,
	Mark Brown <broonie@...aro.org>,
	Benoit Cousson <benoit.cousson@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
	Balaji TK <balajitk@...com>,
	Gururaja Hebbar <gururaja.hebbar@...com>,
	Chris Ball <cjb@...top.org>,
	Jason Kridner <jkridner@...gleboard.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH v3 07/12] dma: edma: Add function to dump a PaRAM set
 from PaRAM

On Monday 05 August 2013 09:44 PM, Joel Fernandes wrote:
> Previously, such a dump function was used but it wasn't reading
> from the PaRAM, rather just from a edmacc_param structure, we
> add a helpful function for debugging that directly reads from
> the PaRAM and gives the current state correctly (including links
> and interrupt information).
> 
> Signed-off-by: Joel Fernandes <joelf@...com>

You should convert existing instances of PaRAM set dump to use this new
function along with introducing it.

Thanks,
Sekhar

> ---
>  drivers/dma/edma.c |   31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
> 
> diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
> index 080d669..a242269 100644
> --- a/drivers/dma/edma.c
> +++ b/drivers/dma/edma.c
> @@ -102,6 +102,37 @@ static void edma_desc_free(struct virt_dma_desc *vdesc)
>  	kfree(container_of(vdesc, struct edma_desc, vdesc));
>  }
>  
> +static inline void dump_pset(struct edma_chan *echan, int slot,
> +		     struct edmacc_param *pset_unused, int pset_idx)
> +{
> +	struct edmacc_param pset_local, *pset;
> +	pset = &pset_local;
> +
> +	edma_read_slot(slot, pset);
> +
> +	dev_dbg(echan->vchan.chan.device->dev,
> +		"\n pset[%d]:\n"
> +		"  chnum\t%d\n"
> +		"  slot\t%d\n"
> +		"  opt\t%08x\n"
> +		"  src\t%08x\n"
> +		"  dst\t%08x\n"
> +		"  abcnt\t%08x\n"
> +		"  ccnt\t%08x\n"
> +		"  bidx\t%08x\n"
> +		"  cidx\t%08x\n"
> +		"  lkrld\t%08x\n",
> +		pset_idx, echan->ch_num, slot,
> +		pset[0].opt,
> +		pset[0].src,
> +		pset[0].dst,
> +		pset[0].a_b_cnt,
> +		pset[0].ccnt,
> +		pset[0].src_dst_bidx,
> +		pset[0].src_dst_cidx,
> +		pset[0].link_bcntrld);
> +}
> +
>  /* Dispatch a queued descriptor to the controller (caller holds lock) */
>  static void edma_execute(struct edma_chan *echan)
>  {
> 

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