From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: Loic Pallardy <loic.pallardy@st.com>
Cc: ohad@wizery.com, linux-remoteproc@vger.kernel.org,
linux-kernel@vger.kernel.org, arnaud.pouliquen@st.com,
benjamin.gaignard@linaro.org
Subject: Re: [PATCH v2 07/16] remoteproc: st: add reserved memory support
Date: Wed, 13 Dec 2017 17:15:59 -0800 [thread overview]
Message-ID: <20171214011559.GI17344@builder> (raw)
In-Reply-To: <1512060411-729-8-git-send-email-loic.pallardy@st.com>
On Thu 30 Nov 08:46 PST 2017, Loic Pallardy wrote:
> ST remote processor needs some specified memory regions for firmware and IPC.
> Memory regions are defined as reserved memory and should be registered in
> remoteproc core thanks to rproc_add_carveout function.
> Memory region release is handled by ST driver itself on remove operation.
>
> Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
> ---
> drivers/remoteproc/st_remoteproc.c | 43 +++++++++++++++++++++++++++++++-------
> 1 file changed, 35 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
> index aacef0e..1549ce8 100644
> --- a/drivers/remoteproc/st_remoteproc.c
> +++ b/drivers/remoteproc/st_remoteproc.c
> @@ -19,6 +19,7 @@
> #include <linux/mfd/syscon.h>
> #include <linux/module.h>
> #include <linux/of.h>
> +#include <linux/of_address.h>
> #include <linux/of_device.h>
> #include <linux/of_reserved_mem.h>
> #include <linux/platform_device.h>
> @@ -208,8 +209,10 @@ static int st_rproc_parse_dt(struct platform_device *pdev)
> struct device *dev = &pdev->dev;
> struct rproc *rproc = platform_get_drvdata(pdev);
> struct st_rproc *ddata = rproc->priv;
> - struct device_node *np = dev->of_node;
> - int err;
> + struct device_node *node, *np = dev->of_node;
> + struct resource res;
> + struct rproc_mem_entry *mem;
> + int err, count, i;
>
> if (ddata->config->sw_reset) {
> ddata->sw_reset = devm_reset_control_get_exclusive(dev,
> @@ -254,10 +257,36 @@ static int st_rproc_parse_dt(struct platform_device *pdev)
> return -EINVAL;
> }
>
> - err = of_reserved_mem_device_init(dev);
> - if (err) {
> - dev_err(dev, "Failed to obtain shared memory\n");
> - return err;
> + count = of_count_phandle_with_args(np, "memory-region", NULL);
> +
> + for (i = 0; i < count; i++) {
If you use of_phandle_iterator this becomes a little bit more compact
and using of_reserved_mem_lookup() gives you the flexibility of
specifying the reserved-memory using size= in addition to a reg=.
of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
while ((err = of_phandle_iterator_next(&it)) == 0) {
rmem = of_reserved_mem_lookup(it->node);
// Memory is rmem->base, rmem->size;
}
> + node = of_parse_phandle(np, "memory-region", i);
> + if (!node) {
> + dev_err(dev, "No memory-region specified\n");
> + return -EINVAL;
> + }
> +
> + err = of_address_to_resource(node, 0, &res);
> + if (err) {
> + dev_err(dev, "Bad memory-region definition\n");
> + return err;
> + }
> +
> + mem = devm_kzalloc(dev, sizeof(*mem), GFP_KERNEL);
> + if (!mem)
> + return -ENOMEM;
> +
> + mem->dma = res.start;
> + mem->da = res.start;
> + mem->len = resource_size(&res);
> + mem->va = devm_ioremap_wc(dev, mem->dma, mem->len);
> + if (!mem->va) {
> + dev_err(dev, "Unable to map memory region: %pa+%zx\n",
> + &res.start, mem->len);
> + return -EBUSY;
> + }
> +
> + rproc_add_carveout(rproc, mem);
> }
We have a few copies of this logic, how about we move this into a helper
function in the core?
Regards,
Bjorn
next prev parent reply other threads:[~2017-12-14 1:16 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 16:46 [PATCH v2 00/16] remoteproc: add fixed memory region support Loic Pallardy
2017-11-30 16:46 ` [PATCH v2 01/16] remoteproc: add rproc_va_to_pa function Loic Pallardy
2017-12-14 0:30 ` Bjorn Andersson
2018-01-12 7:43 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 02/16] remoteproc: add release ops in rproc_mem_entry struct Loic Pallardy
2017-12-14 0:34 ` Bjorn Andersson
2018-01-12 7:43 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 03/16] remoteproc: introduce rproc_add_carveout function Loic Pallardy
2017-12-14 0:36 ` Bjorn Andersson
2018-01-12 7:45 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 04/16] remoteproc: introduce rproc_find_carveout_by_da Loic Pallardy
2017-12-14 0:45 ` Bjorn Andersson
2018-01-12 7:48 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 05/16] remoteproc: modify rproc_handle_carveout to support preallocated region Loic Pallardy
2017-12-14 0:59 ` Bjorn Andersson
2018-01-12 7:56 ` Loic PALLARDY
2018-10-23 17:40 ` Suman Anna
2018-10-23 19:09 ` Loic PALLARDY
2018-10-23 19:12 ` Suman Anna
2017-11-30 16:46 ` [PATCH v2 06/16] remoteproc: modify vring allocation " Loic Pallardy
2017-12-14 1:09 ` Bjorn Andersson
2018-01-12 8:13 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 07/16] remoteproc: st: add reserved memory support Loic Pallardy
2017-12-14 1:15 ` Bjorn Andersson [this message]
2018-01-12 8:19 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 08/16] remoteproc: add name in rproc_mem_entry struct Loic Pallardy
2017-12-14 1:21 ` Bjorn Andersson
2018-01-12 8:19 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 09/16] remoteproc: add memory device management support Loic Pallardy
2017-11-30 16:46 ` [PATCH v2 10/16] remoteproc: add memory device registering in rproc_add_carveout Loic Pallardy
2017-12-14 1:29 ` Bjorn Andersson
2018-01-15 9:09 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 11/16] remoteproc: introduce rproc_find_carveout_by_name function Loic Pallardy
2017-12-14 1:32 ` Bjorn Andersson
2018-01-15 9:10 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 12/16] remoteproc: look-up memory-device for vring allocation Loic Pallardy
2017-12-14 1:44 ` Bjorn Andersson
2018-01-15 20:44 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 13/16] remoteproc: look-up memory-device for virtio device allocation Loic Pallardy
2017-12-14 5:32 ` Bjorn Andersson
2018-01-15 20:57 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 14/16] remoteproc: look-up pre-registered carveout by name for carveout allocation Loic Pallardy
2017-12-14 5:34 ` Bjorn Andersson
2018-01-15 20:59 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 15/16] remoteproc: st: associate memory device to memory regions Loic Pallardy
2017-12-14 5:37 ` Bjorn Andersson
2018-01-15 21:04 ` Loic PALLARDY
2017-11-30 16:46 ` [PATCH v2 16/16] rpmsg: virtio: allocate buffer from parent Loic Pallardy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171214011559.GI17344@builder \
--to=bjorn.andersson@linaro.org \
--cc=arnaud.pouliquen@st.com \
--cc=benjamin.gaignard@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-remoteproc@vger.kernel.org \
--cc=loic.pallardy@st.com \
--cc=ohad@wizery.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).