From: Vinod Koul <vkoul@kernel.org>
To: Sanjay R Mehta <Sanju.Mehta@amd.com>
Cc: gregkh@linuxfoundation.org, dan.j.williams@intel.com,
Thomas.Lendacky@amd.com, Shyam-sundar.S-k@amd.com,
Nehal-bakulchandra.Shah@amd.com, robh@kernel.org,
mchehab+samsung@kernel.org, davem@davemloft.net,
linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org
Subject: Re: [PATCH v9 3/3] dmaengine: ptdma: Add debugfs entries for PTDMA
Date: Wed, 9 Jun 2021 19:40:06 +0530 [thread overview]
Message-ID: <YMDLvnCyfo8+StpW@vkoul-mobl> (raw)
In-Reply-To: <1622654551-9204-4-git-send-email-Sanju.Mehta@amd.com>
On 02-06-21, 12:22, Sanjay R Mehta wrote:
> +/* DebugFS helpers */
> +#define MAX_NAME_LEN 20
> +#define RI_VERSION_NUM 0x0000003F
> +
> +#define RI_NUM_VQM 0x00078000
> +#define RI_NVQM_SHIFT 15
> +
> +static DEFINE_MUTEX(pt_debugfs_lock);
unused?
> +
> +static int pt_debugfs_info_show(struct seq_file *s, void *p)
> +{
> + struct pt_device *pt = s->private;
> + unsigned int regval;
> +
> + if (!pt)
> + return 0;
better return an error code?
> +
> + seq_printf(s, "Device name: %s\n", pt->name);
> + seq_printf(s, " # Queues: %d\n", 1);
> + seq_printf(s, " # Cmds: %d\n", pt->cmd_count);
> +
> + regval = ioread32(pt->io_regs + CMD_PT_VERSION);
how do you ensure your device is not sleeping or you can access iomem
safely?
> +void ptdma_debugfs_setup(struct pt_device *pt)
> +{
> + struct pt_cmd_queue *cmd_q;
> + char name[MAX_NAME_LEN + 1];
> + struct dentry *debugfs_q_instance;
> +
> + if (!debugfs_initialized())
> + return;
> +
> + debugfs_create_file("info", 0400, pt->dma_dev.dbg_dev_root, pt,
> + &pt_debugfs_info_fops);
> +
> + debugfs_create_file("stats", 0600, pt->dma_dev.dbg_dev_root, pt,
why 600 here?
--
~Vinod
next prev parent reply other threads:[~2021-06-09 14:10 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-02 17:22 [PATCH v9 0/3] Add support for AMD PTDMA controller driver Sanjay R Mehta
2021-06-02 17:22 ` [PATCH v9 1/3] dmaengine: ptdma: Initial driver for the AMD PTDMA Sanjay R Mehta
2021-06-08 17:39 ` Vinod Koul
2021-06-15 11:20 ` Sanjay R Mehta
2021-06-16 4:15 ` Vinod Koul
2021-06-16 4:54 ` Sanjay R Mehta
2021-06-16 6:16 ` Greg KH
2021-06-16 6:57 ` Sanjay R Mehta
2021-06-16 7:17 ` Greg KH
2021-06-16 7:52 ` Vinod Koul
2021-06-16 7:59 ` Greg KH
2021-06-16 9:46 ` Sanjay R Mehta
2021-06-16 9:56 ` Vinod Koul
2021-06-16 12:00 ` Sanjay R Mehta
2021-06-16 12:23 ` Greg KH
2021-06-16 12:53 ` Sanjay R Mehta
2021-06-16 12:57 ` Greg KH
2021-06-02 17:22 ` [PATCH v9 2/3] dmaengine: ptdma: register PTDMA controller as a DMA resource Sanjay R Mehta
2021-06-08 18:56 ` Vinod Koul
2021-06-15 11:34 ` Sanjay R Mehta
2021-06-16 4:18 ` Vinod Koul
2021-06-16 5:23 ` Sanjay R Mehta
2021-06-20 3:52 ` Sanjay R Mehta
2021-06-02 17:22 ` [PATCH v9 3/3] dmaengine: ptdma: Add debugfs entries for PTDMA Sanjay R Mehta
2021-06-09 14:10 ` Vinod Koul [this message]
2021-06-15 11:18 ` Sanjay R Mehta
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