From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>,
Ohad Ben-Cohen <ohad@wizery.com>, Andy Gross <agross@kernel.org>,
linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH v2 04/16] rpmsg: ctrl: implement the ioctl function to create device
Date: Thu, 21 Jan 2021 16:52:58 -0700 [thread overview]
Message-ID: <20210121235258.GG611676@xps15> (raw)
In-Reply-To: <20201222105726.16906-5-arnaud.pouliquen@foss.st.com>
On Tue, Dec 22, 2020 at 11:57:14AM +0100, Arnaud Pouliquen wrote:
> Implement the ioctl function that parses the list of
> rpmsg drivers registered to create an associated device.
> To be ISO user API, in a first step, the driver_override
> is only allowed for the RPMsg raw service, supported by the
> rpmsg_char driver.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
> ---
> drivers/rpmsg/rpmsg_ctrl.c | 43 ++++++++++++++++++++++++++++++++++++--
> 1 file changed, 41 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c
> index 065e2e304019..8381b5b2b794 100644
> --- a/drivers/rpmsg/rpmsg_ctrl.c
> +++ b/drivers/rpmsg/rpmsg_ctrl.c
> @@ -56,12 +56,51 @@ static int rpmsg_ctrl_dev_open(struct inode *inode, struct file *filp)
> return 0;
> }
>
> +static const char *rpmsg_ctrl_get_drv_name(u32 service)
> +{
> + struct rpmsg_ctl_info *drv_info;
> +
> + list_for_each_entry(drv_info, &rpmsg_drv_list, node) {
> + if (drv_info->ctrl->service == service)
> + return drv_info->ctrl->drv_name;
> + }
> +
I'm unsure about the above... To me this looks like what the .match() function
of a bus would do. And when I read Bjorn's comment he brought up the
auxiliary_bus. I don't know about the auxiliary_bus but it is worth looking
into. Registering with a bus would streamline a lot of the code in this
patchset.
I'm out of time for today - I will continue tomorrow.
Thanks,
Mathieu
> + return NULL;
> +}
> +
> static long rpmsg_ctrl_dev_ioctl(struct file *fp, unsigned int cmd,
> unsigned long arg)
> {
> struct rpmsg_ctrl_dev *ctrldev = fp->private_data;
> -
> - dev_info(&ctrldev->dev, "Control not yet implemented\n");
> + void __user *argp = (void __user *)arg;
> + struct rpmsg_channel_info chinfo;
> + struct rpmsg_endpoint_info eptinfo;
> + struct rpmsg_device *newch;
> +
> + if (cmd != RPMSG_CREATE_EPT_IOCTL)
> + return -EINVAL;
> +
> + if (copy_from_user(&eptinfo, argp, sizeof(eptinfo)))
> + return -EFAULT;
> +
> + /*
> + * In a frst step only the rpmsg_raw service is supported.
> + * The override is foorced to RPMSG_RAW_SERVICE
> + */
> + chinfo.driver_override = rpmsg_ctrl_get_drv_name(RPMSG_RAW_SERVICE);
> + if (!chinfo.driver_override)
> + return -ENODEV;
> +
> + memcpy(chinfo.name, eptinfo.name, RPMSG_NAME_SIZE);
> + chinfo.name[RPMSG_NAME_SIZE - 1] = '\0';
> + chinfo.src = eptinfo.src;
> + chinfo.dst = eptinfo.dst;
> +
> + newch = rpmsg_create_channel(ctrldev->rpdev, &chinfo);
> + if (!newch) {
> + dev_err(&ctrldev->dev, "rpmsg_create_channel failed\n");
> + return -ENXIO;
> + }
>
> return 0;
> };
> --
> 2.17.1
>
next prev parent reply other threads:[~2021-01-21 23:53 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-22 10:57 [PATCH v2 00/16] introduce generic IOCTL interface for RPMsg channels management Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 01/16] rpmsg: introduce RPMsg control driver for channel creation Arnaud Pouliquen
2020-12-22 16:45 ` Randy Dunlap
2021-01-05 0:21 ` Bjorn Andersson
2021-01-21 23:31 ` Mathieu Poirier
2020-12-22 10:57 ` [PATCH v2 02/16] rpmsg: add RPMsg control API to register service Arnaud Pouliquen
2021-01-05 0:34 ` Bjorn Andersson
2021-01-05 16:53 ` Arnaud POULIQUEN
2021-01-21 23:46 ` Mathieu Poirier
2020-12-22 10:57 ` [PATCH v2 03/16] rpmsg: add override field in channel info Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 04/16] rpmsg: ctrl: implement the ioctl function to create device Arnaud Pouliquen
2021-01-05 1:33 ` Bjorn Andersson
2021-01-05 18:07 ` Arnaud POULIQUEN
2021-01-21 23:52 ` Mathieu Poirier [this message]
2021-01-22 13:05 ` Arnaud POULIQUEN
2021-01-22 20:59 ` Mathieu Poirier
2021-01-25 10:52 ` Arnaud POULIQUEN
2021-01-29 0:13 ` Mathieu Poirier
2021-01-29 9:45 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 05/16] rpmsg: ns: initialize channel info override field Arnaud Pouliquen
2021-01-05 0:38 ` Bjorn Andersson
2021-01-05 17:02 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 06/16] rpmsg: add helper to register the rpmsg ctrl device Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 07/16] rpmsg: char: clean up rpmsg class Arnaud Pouliquen
2021-01-05 0:47 ` Bjorn Andersson
2021-01-05 0:54 ` Bjorn Andersson
2021-01-05 17:03 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 08/16] rpmsg: char: make char rpmsg a rpmsg device without the control part Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 09/16] rpmsg: char: register RPMsg raw service to the ioctl interface Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 10/16] rpmsg: char: allow only one endpoint per device Arnaud Pouliquen
2021-01-05 0:59 ` Bjorn Andersson
2021-01-05 17:05 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 11/16] rpmsg: char: check destination address is not null Arnaud Pouliquen
2021-01-05 1:03 ` Bjorn Andersson
2021-01-05 17:08 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 12/16] rpmsg: virtio: use the driver_override in channel creation ops Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 13/16] rpmsg: virtio: probe the rpmsg_ctl device Arnaud Pouliquen
2020-12-29 4:16 ` kernel test robot
2021-01-04 12:59 ` Dan Carpenter
2020-12-22 10:57 ` [PATCH v2 14/16] rpmsg: glink: add create and release rpmsg channel ops Arnaud Pouliquen
2021-01-05 1:08 ` Bjorn Andersson
2021-01-05 17:29 ` Arnaud POULIQUEN
2020-12-22 10:57 ` [PATCH v2 15/16] rpmsg: smd: " Arnaud Pouliquen
2020-12-22 10:57 ` [PATCH v2 16/16] rpmsg: replace rpmsg_chrdev_register_device use Arnaud Pouliquen
2021-01-05 1:10 ` Bjorn Andersson
2021-01-04 23:03 ` [PATCH v2 00/16] introduce generic IOCTL interface for RPMsg channels management Bjorn Andersson
2021-01-05 16:59 ` Arnaud POULIQUEN
2021-01-13 20:31 ` Mathieu Poirier
2021-01-14 9:05 ` Arnaud POULIQUEN
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