mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
c008fad264
Declare rproc_ops structures as const as they are only passed as an argument to the function rproc_alloc. This argument is of type const, so rproc_ops structures having this property can be declared const too. Done using Coccinelle: @r1 disable optional_qualifier @ identifier i; position p; @@ static struct rproc_ops i@p = {...}; @ok1@ identifier r1.i; position p; @@ rproc_alloc(...,&i@p,...) @bad@ position p!={r1.p,ok1.p}; identifier r1.i; @@ i@p @depends on !bad disable optional_qualifier@ identifier r1.i; @@ +const struct rproc_ops i; File size details: Size of the file remoteproc/da8xx_remoteproc.o remains the same before and after applying the changes. text data bss dec hex filename 1312 100 4 1416 588 remoteproc/da8xx_remoteproc.o 1312 100 4 1416 588 remoteproc/da8xx_remoteproc.o 970 240 0 1210 4ba remoteproc/omap_remoteproc.o 1002 192 0 1194 4aa remoteproc/omap_remoteproc.o 1901 240 0 2141 85d remoteproc/st_remoteproc.o 1933 192 0 2125 84d remoteproc/st_remoteproc.o 1288 96 0 1384 568 remoteproc/st_slim_rproc.o 1320 64 0 1384 568 remoteproc/st_slim_rproc.o 2121 240 0 2361 939 remoteproc/wkup_m3_rproc.o 2161 192 0 2353 931 remoteproc/wkup_m3_rproc.o Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
244 lines
6.3 KiB
C
244 lines
6.3 KiB
C
/*
|
|
* OMAP Remote Processor driver
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments, Inc.
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* Ohad Ben-Cohen <ohad@wizery.com>
|
|
* Brian Swetland <swetland@google.com>
|
|
* Fernando Guzman Lugo <fernando.lugo@ti.com>
|
|
* Mark Grosen <mgrosen@ti.com>
|
|
* Suman Anna <s-anna@ti.com>
|
|
* Hari Kanigeri <h-kanigeri2@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/err.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/remoteproc.h>
|
|
#include <linux/mailbox_client.h>
|
|
#include <linux/omap-mailbox.h>
|
|
|
|
#include <linux/platform_data/remoteproc-omap.h>
|
|
|
|
#include "omap_remoteproc.h"
|
|
#include "remoteproc_internal.h"
|
|
|
|
/**
|
|
* struct omap_rproc - omap remote processor state
|
|
* @mbox: mailbox channel handle
|
|
* @client: mailbox client to request the mailbox channel
|
|
* @rproc: rproc handle
|
|
*/
|
|
struct omap_rproc {
|
|
struct mbox_chan *mbox;
|
|
struct mbox_client client;
|
|
struct rproc *rproc;
|
|
};
|
|
|
|
/**
|
|
* omap_rproc_mbox_callback() - inbound mailbox message handler
|
|
* @client: mailbox client pointer used for requesting the mailbox channel
|
|
* @data: mailbox payload
|
|
*
|
|
* This handler is invoked by omap's mailbox driver whenever a mailbox
|
|
* message is received. Usually, the mailbox payload simply contains
|
|
* the index of the virtqueue that is kicked by the remote processor,
|
|
* and we let remoteproc core handle it.
|
|
*
|
|
* In addition to virtqueue indices, we also have some out-of-band values
|
|
* that indicates different events. Those values are deliberately very
|
|
* big so they don't coincide with virtqueue indices.
|
|
*/
|
|
static void omap_rproc_mbox_callback(struct mbox_client *client, void *data)
|
|
{
|
|
struct omap_rproc *oproc = container_of(client, struct omap_rproc,
|
|
client);
|
|
struct device *dev = oproc->rproc->dev.parent;
|
|
const char *name = oproc->rproc->name;
|
|
u32 msg = (u32)data;
|
|
|
|
dev_dbg(dev, "mbox msg: 0x%x\n", msg);
|
|
|
|
switch (msg) {
|
|
case RP_MBOX_CRASH:
|
|
/* just log this for now. later, we'll also do recovery */
|
|
dev_err(dev, "omap rproc %s crashed\n", name);
|
|
break;
|
|
case RP_MBOX_ECHO_REPLY:
|
|
dev_info(dev, "received echo reply from %s\n", name);
|
|
break;
|
|
default:
|
|
/* msg contains the index of the triggered vring */
|
|
if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)
|
|
dev_dbg(dev, "no message was found in vqid %d\n", msg);
|
|
}
|
|
}
|
|
|
|
/* kick a virtqueue */
|
|
static void omap_rproc_kick(struct rproc *rproc, int vqid)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = rproc->dev.parent;
|
|
int ret;
|
|
|
|
/* send the index of the triggered virtqueue in the mailbox payload */
|
|
ret = mbox_send_message(oproc->mbox, (void *)vqid);
|
|
if (ret < 0)
|
|
dev_err(dev, "failed to send mailbox message, status = %d\n",
|
|
ret);
|
|
}
|
|
|
|
/*
|
|
* Power up the remote processor.
|
|
*
|
|
* This function will be invoked only after the firmware for this rproc
|
|
* was loaded, parsed successfully, and all of its resource requirements
|
|
* were met.
|
|
*/
|
|
static int omap_rproc_start(struct rproc *rproc)
|
|
{
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
struct device *dev = rproc->dev.parent;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
|
|
int ret;
|
|
struct mbox_client *client = &oproc->client;
|
|
|
|
if (pdata->set_bootaddr)
|
|
pdata->set_bootaddr(rproc->bootaddr);
|
|
|
|
client->dev = dev;
|
|
client->tx_done = NULL;
|
|
client->rx_callback = omap_rproc_mbox_callback;
|
|
client->tx_block = false;
|
|
client->knows_txdone = false;
|
|
|
|
oproc->mbox = omap_mbox_request_channel(client, pdata->mbox_name);
|
|
if (IS_ERR(oproc->mbox)) {
|
|
ret = -EBUSY;
|
|
dev_err(dev, "mbox_request_channel failed: %ld\n",
|
|
PTR_ERR(oproc->mbox));
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Ping the remote processor. this is only for sanity-sake;
|
|
* there is no functional effect whatsoever.
|
|
*
|
|
* Note that the reply will _not_ arrive immediately: this message
|
|
* will wait in the mailbox fifo until the remote processor is booted.
|
|
*/
|
|
ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
|
|
if (ret < 0) {
|
|
dev_err(dev, "mbox_send_message failed: %d\n", ret);
|
|
goto put_mbox;
|
|
}
|
|
|
|
ret = pdata->device_enable(pdev);
|
|
if (ret) {
|
|
dev_err(dev, "omap_device_enable failed: %d\n", ret);
|
|
goto put_mbox;
|
|
}
|
|
|
|
return 0;
|
|
|
|
put_mbox:
|
|
mbox_free_channel(oproc->mbox);
|
|
return ret;
|
|
}
|
|
|
|
/* power off the remote processor */
|
|
static int omap_rproc_stop(struct rproc *rproc)
|
|
{
|
|
struct device *dev = rproc->dev.parent;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
|
|
struct omap_rproc *oproc = rproc->priv;
|
|
int ret;
|
|
|
|
ret = pdata->device_shutdown(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mbox_free_channel(oproc->mbox);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rproc_ops omap_rproc_ops = {
|
|
.start = omap_rproc_start,
|
|
.stop = omap_rproc_stop,
|
|
.kick = omap_rproc_kick,
|
|
};
|
|
|
|
static int omap_rproc_probe(struct platform_device *pdev)
|
|
{
|
|
struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
|
|
struct omap_rproc *oproc;
|
|
struct rproc *rproc;
|
|
int ret;
|
|
|
|
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
rproc = rproc_alloc(&pdev->dev, pdata->name, &omap_rproc_ops,
|
|
pdata->firmware, sizeof(*oproc));
|
|
if (!rproc)
|
|
return -ENOMEM;
|
|
|
|
oproc = rproc->priv;
|
|
oproc->rproc = rproc;
|
|
/* All existing OMAP IPU and DSP processors have an MMU */
|
|
rproc->has_iommu = true;
|
|
|
|
platform_set_drvdata(pdev, rproc);
|
|
|
|
ret = rproc_add(rproc);
|
|
if (ret)
|
|
goto free_rproc;
|
|
|
|
return 0;
|
|
|
|
free_rproc:
|
|
rproc_free(rproc);
|
|
return ret;
|
|
}
|
|
|
|
static int omap_rproc_remove(struct platform_device *pdev)
|
|
{
|
|
struct rproc *rproc = platform_get_drvdata(pdev);
|
|
|
|
rproc_del(rproc);
|
|
rproc_free(rproc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver omap_rproc_driver = {
|
|
.probe = omap_rproc_probe,
|
|
.remove = omap_rproc_remove,
|
|
.driver = {
|
|
.name = "omap-rproc",
|
|
},
|
|
};
|
|
|
|
module_platform_driver(omap_rproc_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("OMAP Remote Processor control driver");
|