linux-kernel - Re: [PATCH 2/2] dmaengine: pl330: event debug messages.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20150819164115.GG13546@localhost>
Date:	Wed, 19 Aug 2015 22:11:15 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Michal Suchanek <hramrach@...il.com>
Cc:	Dan Williams <dan.j.williams@...el.com>, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] dmaengine: pl330: event debug messages.

On Tue, Jul 28, 2015 at 10:49:33AM +0000, Michal Suchanek wrote:
> In pl330.c is a define which enables very verbose decoding of genereted
> programs.
> 
> Also add decoding of thread abort states and signalled events.
> 
> Signed-off-by: Michal Suchanek <hramrach@...il.com>
> ---
>  drivers/dma/pl330.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 53 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
> index 257e0d9..9b02936 100644
> --- a/drivers/dma/pl330.c
> +++ b/drivers/dma/pl330.c
> @@ -1318,6 +1318,10 @@ static int _setup_req(unsigned dry_run, struct pl330_thread *thrd,
>  	u8 *buf = req->mc_cpu;
>  	int off = 0;
>  
> +	if (!dry_run)
> +		dev_dbg(thrd->dmac->ddma.dev,
> +			"setting up request on thread %i", thrd->id);
> +
>  	PL330_DBGMC_START(req->mc_bus);
>  
>  	/* DMAMOV CCR, ccr */
> @@ -1545,6 +1549,20 @@ static int pl330_update(struct pl330_dmac *pl330)
>  		pl330->dmac_tbd.reset_mngr = true;
>  	else
>  		pl330->dmac_tbd.reset_mngr = false;
> +#ifdef PL330_DEBUG_MCGEN
do we need this here?

> +	if (val) {
> +		val = readl(regs + FTM);
> +		dev_info(pl330->ddma.dev,
> +			 "Manager thread fault %s%s%s%s%s%s",
> +			 (val & (1 << 30)) ? "dbg iface" : "sys mem",
> +			 (val & (1 << 16)) ? " fetch error" : "",
> +			 (val & (1 << 5)) ? " event sec error" : "",
> +			 (val & (1 << 4)) ? " channel sec error" : "",
> +			 (val & (1 << 1)) ? " invalid operand" : "",
> +			 (val & (1 << 0)) ? " invalid instruction" : ""
> +			);
> +	}
> +#endif
>  
>  	val = readl(regs + FSC) & ((1 << pl330->pcfg.num_chan) - 1);
>  	pl330->dmac_tbd.reset_chan |= val;
> @@ -1552,10 +1570,41 @@ static int pl330_update(struct pl330_dmac *pl330)
>  		int i = 0;
>  		while (i < pl330->pcfg.num_chan) {
>  			if (val & (1 << i)) {
> +				u32 fault = readl(regs + FTC(i));
> +#ifdef PL330_DEBUG_MCGEN
> +				dev_info(pl330->ddma.dev,
> +					 "DMA thread fault"
> +					 "%s%s%s%s%s%s%s%s%s%s%s%s",
This break grep! also looks very ugly and should be a dev_debug rather

> +					 (fault & (1 << 31)) ?
> +					 " lockup" : "",
> +					 (fault & (1 << 30)) ?
> +					 " dbg iface" : " sys mem",
> +					 (fault & (1 << 18)) ?
> +					 " read error" : "",
> +					 (fault & (1 << 17)) ?
> +					 " write error" : "",
> +					 (fault & (1 << 16)) ?
> +					 " instr fetch error" : "",
> +					 (fault & (1 << 12)) ?
> +					 " mfifo over/underflow" : "",
> +					 (fault & (1 << 7)) ?
> +					 " data sec error" : "",
> +					 (fault & (1 << 6)) ?
> +					 " periph sec error" : "",
> +					 (fault & (1 << 5)) ?
> +					 " event sec error" : "",
> +					 (fault & (1 << 4)) ?
> +					 " channel sec error" : "",
> +					 (fault & (1 << 1)) ?
> +					 " invalid operand" : "",
> +					 (fault & (1 << 0)) ?
> +					 " invalid instruction" : ""
> +					);
> +#endif
>  				dev_info(pl330->ddma.dev,
>  					"Reset Channel-%d\t CS-%x FTC-%x\n",
>  						i, readl(regs + CS(i)),
> -						readl(regs + FTC(i)));
> +						fault);
>  				_stop(&pl330->channels[i]);
>  			}
>  			i++;
> @@ -1587,6 +1636,9 @@ static int pl330_update(struct pl330_dmac *pl330)
>  
>  			id = pl330->events[ev];
>  
> +			dev_dbg(pl330->ddma.dev,
> +				"event signalled on thread id %i", id);
> +
>  			thrd = &pl330->channels[id];
>  
>  			active = thrd->req_running;
> -- 
> 2.1.4
> 

-- 
~Vinod
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/