From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/remoteproc/omap_remoteproc.c | 1209 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 1,182 insertions(+), 27 deletions(-)
diff --git a/kernel/drivers/remoteproc/omap_remoteproc.c b/kernel/drivers/remoteproc/omap_remoteproc.c
index a96ce90..43531ca 100644
--- a/kernel/drivers/remoteproc/omap_remoteproc.c
+++ b/kernel/drivers/remoteproc/omap_remoteproc.c
@@ -1,7 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* OMAP Remote Processor driver
*
- * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011-2020 Texas Instruments Incorporated - http://www.ti.com/
* Copyright (C) 2011 Google, Inc.
*
* Ohad Ben-Cohen <ohad@wizery.com>
@@ -10,42 +11,468 @@
* 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/clk.h>
+#include <linux/clk/ti.h>
#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
#include <linux/remoteproc.h>
#include <linux/mailbox_client.h>
+#include <linux/omap-iommu.h>
#include <linux/omap-mailbox.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reset.h>
+#include <clocksource/timer-ti-dm.h>
-#include <linux/platform_data/remoteproc-omap.h>
+#include <linux/platform_data/dmtimer-omap.h>
#include "omap_remoteproc.h"
#include "remoteproc_internal.h"
+
+/* default auto-suspend delay (ms) */
+#define DEFAULT_AUTOSUSPEND_DELAY 10000
+
+/**
+ * struct omap_rproc_boot_data - boot data structure for the DSP omap rprocs
+ * @syscon: regmap handle for the system control configuration module
+ * @boot_reg: boot register offset within the @syscon regmap
+ * @boot_reg_shift: bit-field shift required for the boot address value in
+ * @boot_reg
+ */
+struct omap_rproc_boot_data {
+ struct regmap *syscon;
+ unsigned int boot_reg;
+ unsigned int boot_reg_shift;
+};
+
+/**
+ * struct omap_rproc_mem - internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: bus address used to access the memory region
+ * @dev_addr: device address of the memory region from DSP view
+ * @size: size of the memory region
+ */
+struct omap_rproc_mem {
+ void __iomem *cpu_addr;
+ phys_addr_t bus_addr;
+ u32 dev_addr;
+ size_t size;
+};
+
+/**
+ * struct omap_rproc_timer - data structure for a timer used by a omap rproc
+ * @odt: timer pointer
+ * @timer_ops: OMAP dmtimer ops for @odt timer
+ * @irq: timer irq
+ */
+struct omap_rproc_timer {
+ struct omap_dm_timer *odt;
+ const struct omap_dm_timer_ops *timer_ops;
+ int irq;
+};
/**
* struct omap_rproc - omap remote processor state
* @mbox: mailbox channel handle
* @client: mailbox client to request the mailbox channel
+ * @boot_data: boot data structure for setting processor boot address
+ * @mem: internal memory regions data
+ * @num_mems: number of internal memory regions
+ * @num_timers: number of rproc timer(s)
+ * @num_wd_timers: number of rproc watchdog timers
+ * @timers: timer(s) info used by rproc
+ * @autosuspend_delay: auto-suspend delay value to be used for runtime pm
+ * @need_resume: if true a resume is needed in the system resume callback
* @rproc: rproc handle
+ * @reset: reset handle
+ * @pm_comp: completion primitive to sync for suspend response
+ * @fck: functional clock for the remoteproc
+ * @suspend_acked: state machine flag to store the suspend request ack
*/
struct omap_rproc {
struct mbox_chan *mbox;
struct mbox_client client;
+ struct omap_rproc_boot_data *boot_data;
+ struct omap_rproc_mem *mem;
+ int num_mems;
+ int num_timers;
+ int num_wd_timers;
+ struct omap_rproc_timer *timers;
+ int autosuspend_delay;
+ bool need_resume;
struct rproc *rproc;
+ struct reset_control *reset;
+ struct completion pm_comp;
+ struct clk *fck;
+ bool suspend_acked;
};
+
+/**
+ * struct omap_rproc_mem_data - memory definitions for an omap remote processor
+ * @name: name for this memory entry
+ * @dev_addr: device address for the memory entry
+ */
+struct omap_rproc_mem_data {
+ const char *name;
+ const u32 dev_addr;
+};
+
+/**
+ * struct omap_rproc_dev_data - device data for the omap remote processor
+ * @device_name: device name of the remote processor
+ * @mems: memory definitions for this remote processor
+ */
+struct omap_rproc_dev_data {
+ const char *device_name;
+ const struct omap_rproc_mem_data *mems;
+};
+
+/**
+ * omap_rproc_request_timer() - request a timer for a remoteproc
+ * @dev: device requesting the timer
+ * @np: device node pointer to the desired timer
+ * @timer: handle to a struct omap_rproc_timer to return the timer handle
+ *
+ * This helper function is used primarily to request a timer associated with
+ * a remoteproc. The returned handle is stored in the .odt field of the
+ * @timer structure passed in, and is used to invoke other timer specific
+ * ops (like starting a timer either during device initialization or during
+ * a resume operation, or for stopping/freeing a timer).
+ *
+ * Return: 0 on success, otherwise an appropriate failure
+ */
+static int omap_rproc_request_timer(struct device *dev, struct device_node *np,
+ struct omap_rproc_timer *timer)
+{
+ int ret;
+
+ timer->odt = timer->timer_ops->request_by_node(np);
+ if (!timer->odt) {
+ dev_err(dev, "request for timer node %p failed\n", np);
+ return -EBUSY;
+ }
+
+ ret = timer->timer_ops->set_source(timer->odt, OMAP_TIMER_SRC_SYS_CLK);
+ if (ret) {
+ dev_err(dev, "error setting OMAP_TIMER_SRC_SYS_CLK as source for timer node %p\n",
+ np);
+ timer->timer_ops->free(timer->odt);
+ return ret;
+ }
+
+ /* clean counter, remoteproc code will set the value */
+ timer->timer_ops->set_load(timer->odt, 0);
+
+ return 0;
+}
+
+/**
+ * omap_rproc_start_timer() - start a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used to start a timer associated with a remoteproc,
+ * obtained using the request_timer ops. The helper function needs to be
+ * invoked by the driver to start the timer (during device initialization)
+ * or to just resume the timer.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_start_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->start(timer->odt);
+}
+
+/**
+ * omap_rproc_stop_timer() - stop a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used to disable a timer associated with a
+ * remoteproc, and needs to be called either during a device shutdown
+ * or suspend operation. The separate helper function allows the driver
+ * to just stop a timer without having to release the timer during a
+ * suspend operation.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_stop_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->stop(timer->odt);
+}
+
+/**
+ * omap_rproc_release_timer() - release a timer for a remoteproc
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This helper function is used primarily to release a timer associated
+ * with a remoteproc. The dmtimer will be available for other clients to
+ * use once released.
+ *
+ * Return: 0 on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_release_timer(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->free(timer->odt);
+}
+
+/**
+ * omap_rproc_get_timer_irq() - get the irq for a timer
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This function is used to get the irq associated with a watchdog timer. The
+ * function is called by the OMAP remoteproc driver to register a interrupt
+ * handler to handle watchdog events on the remote processor.
+ *
+ * Return: irq id on success, otherwise a failure as returned by DMTimer ops
+ */
+static inline int omap_rproc_get_timer_irq(struct omap_rproc_timer *timer)
+{
+ return timer->timer_ops->get_irq(timer->odt);
+}
+
+/**
+ * omap_rproc_ack_timer_irq() - acknowledge a timer irq
+ * @timer: handle to a OMAP rproc timer
+ *
+ * This function is used to clear the irq associated with a watchdog timer. The
+ * The function is called by the OMAP remoteproc upon a watchdog event on the
+ * remote processor to clear the interrupt status of the watchdog timer.
+ */
+static inline void omap_rproc_ack_timer_irq(struct omap_rproc_timer *timer)
+{
+ timer->timer_ops->write_status(timer->odt, OMAP_TIMER_INT_OVERFLOW);
+}
+
+/**
+ * omap_rproc_watchdog_isr() - Watchdog ISR handler for remoteproc device
+ * @irq: IRQ number associated with a watchdog timer
+ * @data: IRQ handler data
+ *
+ * This ISR routine executes the required necessary low-level code to
+ * acknowledge a watchdog timer interrupt. There can be multiple watchdog
+ * timers associated with a rproc (like IPUs which have 2 watchdog timers,
+ * one per Cortex M3/M4 core), so a lookup has to be performed to identify
+ * the timer to acknowledge its interrupt.
+ *
+ * The function also invokes rproc_report_crash to report the watchdog event
+ * to the remoteproc driver core, to trigger a recovery.
+ *
+ * Return: IRQ_HANDLED on success, otherwise IRQ_NONE
+ */
+static irqreturn_t omap_rproc_watchdog_isr(int irq, void *data)
+{
+ struct rproc *rproc = data;
+ struct omap_rproc *oproc = rproc->priv;
+ struct device *dev = rproc->dev.parent;
+ struct omap_rproc_timer *timers = oproc->timers;
+ struct omap_rproc_timer *wd_timer = NULL;
+ int num_timers = oproc->num_timers + oproc->num_wd_timers;
+ int i;
+
+ for (i = oproc->num_timers; i < num_timers; i++) {
+ if (timers[i].irq > 0 && irq == timers[i].irq) {
+ wd_timer = &timers[i];
+ break;
+ }
+ }
+
+ if (!wd_timer) {
+ dev_err(dev, "invalid timer\n");
+ return IRQ_NONE;
+ }
+
+ omap_rproc_ack_timer_irq(wd_timer);
+
+ rproc_report_crash(rproc, RPROC_WATCHDOG);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * omap_rproc_enable_timers() - enable the timers for a remoteproc
+ * @rproc: handle of a remote processor
+ * @configure: boolean flag used to acquire and configure the timer handle
+ *
+ * This function is used primarily to enable the timers associated with
+ * a remoteproc. The configure flag is provided to allow the driver to
+ * to either acquire and start a timer (during device initialization) or
+ * to just start a timer (during a resume operation).
+ *
+ * Return: 0 on success, otherwise an appropriate failure
+ */
+static int omap_rproc_enable_timers(struct rproc *rproc, bool configure)
+{
+ int i;
+ int ret = 0;
+ struct platform_device *tpdev;
+ struct dmtimer_platform_data *tpdata;
+ const struct omap_dm_timer_ops *timer_ops;
+ struct omap_rproc *oproc = rproc->priv;
+ struct omap_rproc_timer *timers = oproc->timers;
+ struct device *dev = rproc->dev.parent;
+ struct device_node *np = NULL;
+ int num_timers = oproc->num_timers + oproc->num_wd_timers;
+
+ if (!num_timers)
+ return 0;
+
+ if (!configure)
+ goto start_timers;
+
+ for (i = 0; i < num_timers; i++) {
+ if (i < oproc->num_timers)
+ np = of_parse_phandle(dev->of_node, "ti,timers", i);
+ else
+ np = of_parse_phandle(dev->of_node,
+ "ti,watchdog-timers",
+ (i - oproc->num_timers));
+ if (!np) {
+ ret = -ENXIO;
+ dev_err(dev, "device node lookup for timer at index %d failed: %d\n",
+ i < oproc->num_timers ? i :
+ i - oproc->num_timers, ret);
+ goto free_timers;
+ }
+
+ tpdev = of_find_device_by_node(np);
+ if (!tpdev) {
+ ret = -ENODEV;
+ dev_err(dev, "could not get timer platform device\n");
+ goto put_node;
+ }
+
+ tpdata = dev_get_platdata(&tpdev->dev);
+ put_device(&tpdev->dev);
+ if (!tpdata) {
+ ret = -EINVAL;
+ dev_err(dev, "dmtimer pdata structure NULL\n");
+ goto put_node;
+ }
+
+ timer_ops = tpdata->timer_ops;
+ if (!timer_ops || !timer_ops->request_by_node ||
+ !timer_ops->set_source || !timer_ops->set_load ||
+ !timer_ops->free || !timer_ops->start ||
+ !timer_ops->stop || !timer_ops->get_irq ||
+ !timer_ops->write_status) {
+ ret = -EINVAL;
+ dev_err(dev, "device does not have required timer ops\n");
+ goto put_node;
+ }
+
+ timers[i].irq = -1;
+ timers[i].timer_ops = timer_ops;
+ ret = omap_rproc_request_timer(dev, np, &timers[i]);
+ if (ret) {
+ dev_err(dev, "request for timer %p failed: %d\n", np,
+ ret);
+ goto put_node;
+ }
+ of_node_put(np);
+
+ if (i >= oproc->num_timers) {
+ timers[i].irq = omap_rproc_get_timer_irq(&timers[i]);
+ if (timers[i].irq < 0) {
+ dev_err(dev, "get_irq for timer %p failed: %d\n",
+ np, timers[i].irq);
+ ret = -EBUSY;
+ goto free_timers;
+ }
+
+ ret = request_irq(timers[i].irq,
+ omap_rproc_watchdog_isr, IRQF_SHARED,
+ "rproc-wdt", rproc);
+ if (ret) {
+ dev_err(dev, "error requesting irq for timer %p\n",
+ np);
+ omap_rproc_release_timer(&timers[i]);
+ timers[i].odt = NULL;
+ timers[i].timer_ops = NULL;
+ timers[i].irq = -1;
+ goto free_timers;
+ }
+ }
+ }
+
+start_timers:
+ for (i = 0; i < num_timers; i++) {
+ ret = omap_rproc_start_timer(&timers[i]);
+ if (ret) {
+ dev_err(dev, "start timer %p failed failed: %d\n", np,
+ ret);
+ break;
+ }
+ }
+ if (ret) {
+ while (i >= 0) {
+ omap_rproc_stop_timer(&timers[i]);
+ i--;
+ }
+ goto put_node;
+ }
+ return 0;
+
+put_node:
+ if (configure)
+ of_node_put(np);
+free_timers:
+ while (i--) {
+ if (i >= oproc->num_timers)
+ free_irq(timers[i].irq, rproc);
+ omap_rproc_release_timer(&timers[i]);
+ timers[i].odt = NULL;
+ timers[i].timer_ops = NULL;
+ timers[i].irq = -1;
+ }
+
+ return ret;
+}
+
+/**
+ * omap_rproc_disable_timers() - disable the timers for a remoteproc
+ * @rproc: handle of a remote processor
+ * @configure: boolean flag used to release the timer handle
+ *
+ * This function is used primarily to disable the timers associated with
+ * a remoteproc. The configure flag is provided to allow the driver to
+ * to either stop and release a timer (during device shutdown) or to just
+ * stop a timer (during a suspend operation).
+ *
+ * Return: 0 on success or no timers
+ */
+static int omap_rproc_disable_timers(struct rproc *rproc, bool configure)
+{
+ int i;
+ struct omap_rproc *oproc = rproc->priv;
+ struct omap_rproc_timer *timers = oproc->timers;
+ int num_timers = oproc->num_timers + oproc->num_wd_timers;
+
+ if (!num_timers)
+ return 0;
+
+ for (i = 0; i < num_timers; i++) {
+ omap_rproc_stop_timer(&timers[i]);
+ if (configure) {
+ if (i >= oproc->num_timers)
+ free_irq(timers[i].irq, rproc);
+ omap_rproc_release_timer(&timers[i]);
+ timers[i].odt = NULL;
+ timers[i].timer_ops = NULL;
+ timers[i].irq = -1;
+ }
+ }
+
+ return 0;
+}
/**
* omap_rproc_mbox_callback() - inbound mailbox message handler
@@ -73,13 +500,28 @@
switch (msg) {
case RP_MBOX_CRASH:
- /* just log this for now. later, we'll also do recovery */
+ /*
+ * remoteproc detected an exception, notify the rproc core.
+ * The remoteproc core will handle the recovery.
+ */
dev_err(dev, "omap rproc %s crashed\n", name);
+ rproc_report_crash(oproc->rproc, RPROC_FATAL_ERROR);
break;
case RP_MBOX_ECHO_REPLY:
dev_info(dev, "received echo reply from %s\n", name);
break;
+ case RP_MBOX_SUSPEND_ACK:
+ case RP_MBOX_SUSPEND_CANCEL:
+ oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK;
+ complete(&oproc->pm_comp);
+ break;
default:
+ if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
+ return;
+ if (msg > oproc->rproc->max_notifyid) {
+ dev_dbg(dev, "dropping unknown message 0x%x", msg);
+ return;
+ }
/* 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);
@@ -93,11 +535,52 @@
struct device *dev = rproc->dev.parent;
int ret;
+ /* wake up the rproc before kicking it */
+ ret = pm_runtime_get_sync(dev);
+ if (WARN_ON(ret < 0)) {
+ dev_err(dev, "pm_runtime_get_sync() failed during kick, ret = %d\n",
+ ret);
+ pm_runtime_put_noidle(dev);
+ return;
+ }
+
/* 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);
+
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+}
+
+/**
+ * omap_rproc_write_dsp_boot_addr() - set boot address for DSP remote processor
+ * @rproc: handle of a remote processor
+ *
+ * Set boot address for a supported DSP remote processor.
+ *
+ * Return: 0 on success, or -EINVAL if boot address is not aligned properly
+ */
+static int omap_rproc_write_dsp_boot_addr(struct rproc *rproc)
+{
+ struct device *dev = rproc->dev.parent;
+ struct omap_rproc *oproc = rproc->priv;
+ struct omap_rproc_boot_data *bdata = oproc->boot_data;
+ u32 offset = bdata->boot_reg;
+ u32 value;
+ u32 mask;
+
+ if (rproc->bootaddr & (SZ_1K - 1)) {
+ dev_err(dev, "invalid boot address 0x%llx, must be aligned on a 1KB boundary\n",
+ rproc->bootaddr);
+ return -EINVAL;
+ }
+
+ value = rproc->bootaddr >> bdata->boot_reg_shift;
+ mask = ~(SZ_1K - 1) >> bdata->boot_reg_shift;
+
+ return regmap_update_bits(bdata->syscon, offset, mask, value);
}
/*
@@ -111,13 +594,14 @@
{
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);
+ if (oproc->boot_data) {
+ ret = omap_rproc_write_dsp_boot_addr(rproc);
+ if (ret)
+ return ret;
+ }
client->dev = dev;
client->tx_done = NULL;
@@ -125,7 +609,7 @@
client->tx_block = false;
client->knows_txdone = false;
- oproc->mbox = omap_mbox_request_channel(client, pdata->mbox_name);
+ oproc->mbox = mbox_request_channel(client, 0);
if (IS_ERR(oproc->mbox)) {
ret = -EBUSY;
dev_err(dev, "mbox_request_channel failed: %ld\n",
@@ -146,14 +630,34 @@
goto put_mbox;
}
- ret = pdata->device_enable(pdev);
+ ret = omap_rproc_enable_timers(rproc, true);
if (ret) {
- dev_err(dev, "omap_device_enable failed: %d\n", ret);
+ dev_err(dev, "omap_rproc_enable_timers failed: %d\n", ret);
goto put_mbox;
}
+ ret = reset_control_deassert(oproc->reset);
+ if (ret) {
+ dev_err(dev, "reset control deassert failed: %d\n", ret);
+ goto disable_timers;
+ }
+
+ /*
+ * remote processor is up, so update the runtime pm status and
+ * enable the auto-suspend. The device usage count is incremented
+ * manually for balancing it for auto-suspend
+ */
+ pm_runtime_set_active(dev);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_get_noresume(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
return 0;
+disable_timers:
+ omap_rproc_disable_timers(rproc, true);
put_mbox:
mbox_free_channel(oproc->mbox);
return ret;
@@ -163,32 +667,638 @@
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)
+ /*
+ * cancel any possible scheduled runtime suspend by incrementing
+ * the device usage count, and resuming the device. The remoteproc
+ * also needs to be woken up if suspended, to avoid the remoteproc
+ * OS to continue to remember any context that it has saved, and
+ * avoid potential issues in misindentifying a subsequent device
+ * reboot as a power restore boot
+ */
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0) {
+ pm_runtime_put_noidle(dev);
return ret;
+ }
+
+ ret = reset_control_assert(oproc->reset);
+ if (ret)
+ goto out;
+
+ ret = omap_rproc_disable_timers(rproc, true);
+ if (ret)
+ goto enable_device;
mbox_free_channel(oproc->mbox);
+ /*
+ * update the runtime pm states and status now that the remoteproc
+ * has stopped
+ */
+ pm_runtime_disable(dev);
+ pm_runtime_dont_use_autosuspend(dev);
+ pm_runtime_put_noidle(dev);
+ pm_runtime_set_suspended(dev);
+
return 0;
+
+enable_device:
+ reset_control_deassert(oproc->reset);
+out:
+ /* schedule the next auto-suspend */
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+ return ret;
+}
+
+/**
+ * omap_rproc_da_to_va() - internal memory translation helper
+ * @rproc: remote processor to apply the address translation for
+ * @da: device address to translate
+ * @len: length of the memory buffer
+ *
+ * Custom function implementing the rproc .da_to_va ops to provide address
+ * translation (device address to kernel virtual address) for internal RAMs
+ * present in a DSP or IPU device). The translated addresses can be used
+ * either by the remoteproc core for loading, or by any rpmsg bus drivers.
+ *
+ * Return: translated virtual address in kernel memory space on success,
+ * or NULL on failure.
+ */
+static void *omap_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
+{
+ struct omap_rproc *oproc = rproc->priv;
+ int i;
+ u32 offset;
+
+ if (len <= 0)
+ return NULL;
+
+ if (!oproc->num_mems)
+ return NULL;
+
+ for (i = 0; i < oproc->num_mems; i++) {
+ if (da >= oproc->mem[i].dev_addr && da + len <=
+ oproc->mem[i].dev_addr + oproc->mem[i].size) {
+ offset = da - oproc->mem[i].dev_addr;
+ /* __force to make sparse happy with type conversion */
+ return (__force void *)(oproc->mem[i].cpu_addr +
+ offset);
+ }
+ }
+
+ return NULL;
}
static const struct rproc_ops omap_rproc_ops = {
.start = omap_rproc_start,
.stop = omap_rproc_stop,
.kick = omap_rproc_kick,
+ .da_to_va = omap_rproc_da_to_va,
};
+
+#ifdef CONFIG_PM
+static bool _is_rproc_in_standby(struct omap_rproc *oproc)
+{
+ return ti_clk_is_in_standby(oproc->fck);
+}
+
+/* 1 sec is long enough time to let the remoteproc side suspend the device */
+#define DEF_SUSPEND_TIMEOUT 1000
+static int _omap_rproc_suspend(struct rproc *rproc, bool auto_suspend)
+{
+ struct device *dev = rproc->dev.parent;
+ struct omap_rproc *oproc = rproc->priv;
+ unsigned long to = msecs_to_jiffies(DEF_SUSPEND_TIMEOUT);
+ unsigned long ta = jiffies + to;
+ u32 suspend_msg = auto_suspend ?
+ RP_MBOX_SUSPEND_AUTO : RP_MBOX_SUSPEND_SYSTEM;
+ int ret;
+
+ reinit_completion(&oproc->pm_comp);
+ oproc->suspend_acked = false;
+ ret = mbox_send_message(oproc->mbox, (void *)suspend_msg);
+ if (ret < 0) {
+ dev_err(dev, "PM mbox_send_message failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = wait_for_completion_timeout(&oproc->pm_comp, to);
+ if (!oproc->suspend_acked)
+ return -EBUSY;
+
+ /*
+ * The remoteproc side is returning the ACK message before saving the
+ * context, because the context saving is performed within a SYS/BIOS
+ * function, and it cannot have any inter-dependencies against the IPC
+ * layer. Also, as the SYS/BIOS needs to preserve properly the processor
+ * register set, sending this ACK or signalling the completion of the
+ * context save through a shared memory variable can never be the
+ * absolute last thing to be executed on the remoteproc side, and the
+ * MPU cannot use the ACK message as a sync point to put the remoteproc
+ * into reset. The only way to ensure that the remote processor has
+ * completed saving the context is to check that the module has reached
+ * STANDBY state (after saving the context, the SYS/BIOS executes the
+ * appropriate target-specific WFI instruction causing the module to
+ * enter STANDBY).
+ */
+ while (!_is_rproc_in_standby(oproc)) {
+ if (time_after(jiffies, ta))
+ return -ETIME;
+ schedule();
+ }
+
+ ret = reset_control_assert(oproc->reset);
+ if (ret) {
+ dev_err(dev, "reset assert during suspend failed %d\n", ret);
+ return ret;
+ }
+
+ ret = omap_rproc_disable_timers(rproc, false);
+ if (ret) {
+ dev_err(dev, "disabling timers during suspend failed %d\n",
+ ret);
+ goto enable_device;
+ }
+
+ /*
+ * IOMMUs would have to be disabled specifically for runtime suspend.
+ * They are handled automatically through System PM callbacks for
+ * regular system suspend
+ */
+ if (auto_suspend) {
+ ret = omap_iommu_domain_deactivate(rproc->domain);
+ if (ret) {
+ dev_err(dev, "iommu domain deactivate failed %d\n",
+ ret);
+ goto enable_timers;
+ }
+ }
+
+ return 0;
+
+enable_timers:
+ /* ignore errors on re-enabling code */
+ omap_rproc_enable_timers(rproc, false);
+enable_device:
+ reset_control_deassert(oproc->reset);
+ return ret;
+}
+
+static int _omap_rproc_resume(struct rproc *rproc, bool auto_suspend)
+{
+ struct device *dev = rproc->dev.parent;
+ struct omap_rproc *oproc = rproc->priv;
+ int ret;
+
+ /*
+ * IOMMUs would have to be enabled specifically for runtime resume.
+ * They would have been already enabled automatically through System
+ * PM callbacks for regular system resume
+ */
+ if (auto_suspend) {
+ ret = omap_iommu_domain_activate(rproc->domain);
+ if (ret) {
+ dev_err(dev, "omap_iommu activate failed %d\n", ret);
+ goto out;
+ }
+ }
+
+ /* boot address could be lost after suspend, so restore it */
+ if (oproc->boot_data) {
+ ret = omap_rproc_write_dsp_boot_addr(rproc);
+ if (ret) {
+ dev_err(dev, "boot address restore failed %d\n", ret);
+ goto suspend_iommu;
+ }
+ }
+
+ ret = omap_rproc_enable_timers(rproc, false);
+ if (ret) {
+ dev_err(dev, "enabling timers during resume failed %d\n", ret);
+ goto suspend_iommu;
+ }
+
+ ret = reset_control_deassert(oproc->reset);
+ if (ret) {
+ dev_err(dev, "reset deassert during resume failed %d\n", ret);
+ goto disable_timers;
+ }
+
+ return 0;
+
+disable_timers:
+ omap_rproc_disable_timers(rproc, false);
+suspend_iommu:
+ if (auto_suspend)
+ omap_iommu_domain_deactivate(rproc->domain);
+out:
+ return ret;
+}
+
+static int __maybe_unused omap_rproc_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct omap_rproc *oproc = rproc->priv;
+ int ret = 0;
+
+ mutex_lock(&rproc->lock);
+ if (rproc->state == RPROC_OFFLINE)
+ goto out;
+
+ if (rproc->state == RPROC_SUSPENDED)
+ goto out;
+
+ if (rproc->state != RPROC_RUNNING) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ret = _omap_rproc_suspend(rproc, false);
+ if (ret) {
+ dev_err(dev, "suspend failed %d\n", ret);
+ goto out;
+ }
+
+ /*
+ * remoteproc is running at the time of system suspend, so remember
+ * it so as to wake it up during system resume
+ */
+ oproc->need_resume = true;
+ rproc->state = RPROC_SUSPENDED;
+
+out:
+ mutex_unlock(&rproc->lock);
+ return ret;
+}
+
+static int __maybe_unused omap_rproc_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rproc *rproc = platform_get_drvdata(pdev);
+ struct omap_rproc *oproc = rproc->priv;
+ int ret = 0;
+
+ mutex_lock(&rproc->lock);
+ if (rproc->state == RPROC_OFFLINE)
+ goto out;
+
+ if (rproc->state != RPROC_SUSPENDED) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ /*
+ * remoteproc was auto-suspended at the time of system suspend,
+ * so no need to wake-up the processor (leave it in suspended
+ * state, will be woken up during a subsequent runtime_resume)
+ */
+ if (!oproc->need_resume)
+ goto out;
+
+ ret = _omap_rproc_resume(rproc, false);
+ if (ret) {
+ dev_err(dev, "resume failed %d\n", ret);
+ goto out;
+ }
+
+ oproc->need_resume = false;
+ rproc->state = RPROC_RUNNING;
+
+ pm_runtime_mark_last_busy(dev);
+out:
+ mutex_unlock(&rproc->lock);
+ return ret;
+}
+
+static int omap_rproc_runtime_suspend(struct device *dev)
+{
+ struct rproc *rproc = dev_get_drvdata(dev);
+ struct omap_rproc *oproc = rproc->priv;
+ int ret;
+
+ mutex_lock(&rproc->lock);
+ if (rproc->state == RPROC_CRASHED) {
+ dev_dbg(dev, "rproc cannot be runtime suspended when crashed!\n");
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (WARN_ON(rproc->state != RPROC_RUNNING)) {
+ dev_err(dev, "rproc cannot be runtime suspended when not running!\n");
+ ret = -EBUSY;
+ goto out;
+ }
+
+ /*
+ * do not even attempt suspend if the remote processor is not
+ * idled for runtime auto-suspend
+ */
+ if (!_is_rproc_in_standby(oproc)) {
+ ret = -EBUSY;
+ goto abort;
+ }
+
+ ret = _omap_rproc_suspend(rproc, true);
+ if (ret)
+ goto abort;
+
+ rproc->state = RPROC_SUSPENDED;
+ mutex_unlock(&rproc->lock);
+ return 0;
+
+abort:
+ pm_runtime_mark_last_busy(dev);
+out:
+ mutex_unlock(&rproc->lock);
+ return ret;
+}
+
+static int omap_rproc_runtime_resume(struct device *dev)
+{
+ struct rproc *rproc = dev_get_drvdata(dev);
+ int ret;
+
+ mutex_lock(&rproc->lock);
+ if (WARN_ON(rproc->state != RPROC_SUSPENDED)) {
+ dev_err(dev, "rproc cannot be runtime resumed if not suspended! state=%d\n",
+ rproc->state);
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ret = _omap_rproc_resume(rproc, true);
+ if (ret) {
+ dev_err(dev, "runtime resume failed %d\n", ret);
+ goto out;
+ }
+
+ rproc->state = RPROC_RUNNING;
+out:
+ mutex_unlock(&rproc->lock);
+ return ret;
+}
+#endif /* CONFIG_PM */
+
+static const struct omap_rproc_mem_data ipu_mems[] = {
+ { .name = "l2ram", .dev_addr = 0x20000000 },
+ { },
+};
+
+static const struct omap_rproc_mem_data dra7_dsp_mems[] = {
+ { .name = "l2ram", .dev_addr = 0x800000 },
+ { .name = "l1pram", .dev_addr = 0xe00000 },
+ { .name = "l1dram", .dev_addr = 0xf00000 },
+ { },
+};
+
+static const struct omap_rproc_dev_data omap4_dsp_dev_data = {
+ .device_name = "dsp",
+};
+
+static const struct omap_rproc_dev_data omap4_ipu_dev_data = {
+ .device_name = "ipu",
+ .mems = ipu_mems,
+};
+
+static const struct omap_rproc_dev_data omap5_dsp_dev_data = {
+ .device_name = "dsp",
+};
+
+static const struct omap_rproc_dev_data omap5_ipu_dev_data = {
+ .device_name = "ipu",
+ .mems = ipu_mems,
+};
+
+static const struct omap_rproc_dev_data dra7_dsp_dev_data = {
+ .device_name = "dsp",
+ .mems = dra7_dsp_mems,
+};
+
+static const struct omap_rproc_dev_data dra7_ipu_dev_data = {
+ .device_name = "ipu",
+ .mems = ipu_mems,
+};
+
+static const struct of_device_id omap_rproc_of_match[] = {
+ {
+ .compatible = "ti,omap4-dsp",
+ .data = &omap4_dsp_dev_data,
+ },
+ {
+ .compatible = "ti,omap4-ipu",
+ .data = &omap4_ipu_dev_data,
+ },
+ {
+ .compatible = "ti,omap5-dsp",
+ .data = &omap5_dsp_dev_data,
+ },
+ {
+ .compatible = "ti,omap5-ipu",
+ .data = &omap5_ipu_dev_data,
+ },
+ {
+ .compatible = "ti,dra7-dsp",
+ .data = &dra7_dsp_dev_data,
+ },
+ {
+ .compatible = "ti,dra7-ipu",
+ .data = &dra7_ipu_dev_data,
+ },
+ {
+ /* end */
+ },
+};
+MODULE_DEVICE_TABLE(of, omap_rproc_of_match);
+
+static const char *omap_rproc_get_firmware(struct platform_device *pdev)
+{
+ const char *fw_name;
+ int ret;
+
+ ret = of_property_read_string(pdev->dev.of_node, "firmware-name",
+ &fw_name);
+ if (ret)
+ return ERR_PTR(ret);
+
+ return fw_name;
+}
+
+static int omap_rproc_get_boot_data(struct platform_device *pdev,
+ struct rproc *rproc)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct omap_rproc *oproc = rproc->priv;
+ const struct omap_rproc_dev_data *data;
+ int ret;
+
+ data = of_device_get_match_data(&pdev->dev);
+ if (!data)
+ return -ENODEV;
+
+ if (!of_property_read_bool(np, "ti,bootreg"))
+ return 0;
+
+ oproc->boot_data = devm_kzalloc(&pdev->dev, sizeof(*oproc->boot_data),
+ GFP_KERNEL);
+ if (!oproc->boot_data)
+ return -ENOMEM;
+
+ oproc->boot_data->syscon =
+ syscon_regmap_lookup_by_phandle(np, "ti,bootreg");
+ if (IS_ERR(oproc->boot_data->syscon)) {
+ ret = PTR_ERR(oproc->boot_data->syscon);
+ return ret;
+ }
+
+ if (of_property_read_u32_index(np, "ti,bootreg", 1,
+ &oproc->boot_data->boot_reg)) {
+ dev_err(&pdev->dev, "couldn't get the boot register\n");
+ return -EINVAL;
+ }
+
+ of_property_read_u32_index(np, "ti,bootreg", 2,
+ &oproc->boot_data->boot_reg_shift);
+
+ return 0;
+}
+
+static int omap_rproc_of_get_internal_memories(struct platform_device *pdev,
+ struct rproc *rproc)
+{
+ struct omap_rproc *oproc = rproc->priv;
+ struct device *dev = &pdev->dev;
+ const struct omap_rproc_dev_data *data;
+ struct resource *res;
+ int num_mems;
+ int i;
+
+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -ENODEV;
+
+ if (!data->mems)
+ return 0;
+
+ num_mems = of_property_count_elems_of_size(dev->of_node, "reg",
+ sizeof(u32)) / 2;
+
+ oproc->mem = devm_kcalloc(dev, num_mems, sizeof(*oproc->mem),
+ GFP_KERNEL);
+ if (!oproc->mem)
+ return -ENOMEM;
+
+ for (i = 0; data->mems[i].name; i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ data->mems[i].name);
+ if (!res) {
+ dev_err(dev, "no memory defined for %s\n",
+ data->mems[i].name);
+ return -ENOMEM;
+ }
+ oproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+ if (IS_ERR(oproc->mem[i].cpu_addr)) {
+ dev_err(dev, "failed to parse and map %s memory\n",
+ data->mems[i].name);
+ return PTR_ERR(oproc->mem[i].cpu_addr);
+ }
+ oproc->mem[i].bus_addr = res->start;
+ oproc->mem[i].dev_addr = data->mems[i].dev_addr;
+ oproc->mem[i].size = resource_size(res);
+
+ dev_dbg(dev, "memory %8s: bus addr %pa size 0x%x va %pK da 0x%x\n",
+ data->mems[i].name, &oproc->mem[i].bus_addr,
+ oproc->mem[i].size, oproc->mem[i].cpu_addr,
+ oproc->mem[i].dev_addr);
+ }
+ oproc->num_mems = num_mems;
+
+ return 0;
+}
+
+#ifdef CONFIG_OMAP_REMOTEPROC_WATCHDOG
+static int omap_rproc_count_wdog_timers(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ int ret;
+
+ ret = of_count_phandle_with_args(np, "ti,watchdog-timers", NULL);
+ if (ret <= 0) {
+ dev_dbg(dev, "device does not have watchdog timers, status = %d\n",
+ ret);
+ ret = 0;
+ }
+
+ return ret;
+}
+#else
+static int omap_rproc_count_wdog_timers(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+static int omap_rproc_of_get_timers(struct platform_device *pdev,
+ struct rproc *rproc)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct omap_rproc *oproc = rproc->priv;
+ struct device *dev = &pdev->dev;
+ int num_timers;
+
+ /*
+ * Timer nodes are directly used in client nodes as phandles, so
+ * retrieve the count using appropriate size
+ */
+ oproc->num_timers = of_count_phandle_with_args(np, "ti,timers", NULL);
+ if (oproc->num_timers <= 0) {
+ dev_dbg(dev, "device does not have timers, status = %d\n",
+ oproc->num_timers);
+ oproc->num_timers = 0;
+ }
+
+ oproc->num_wd_timers = omap_rproc_count_wdog_timers(dev);
+
+ num_timers = oproc->num_timers + oproc->num_wd_timers;
+ if (num_timers) {
+ oproc->timers = devm_kcalloc(dev, num_timers,
+ sizeof(*oproc->timers),
+ GFP_KERNEL);
+ if (!oproc->timers)
+ return -ENOMEM;
+
+ dev_dbg(dev, "device has %d tick timers and %d watchdog timers\n",
+ oproc->num_timers, oproc->num_wd_timers);
+ }
+
+ return 0;
+}
static int omap_rproc_probe(struct platform_device *pdev)
{
- struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
struct omap_rproc *oproc;
struct rproc *rproc;
+ const char *firmware;
int ret;
+ struct reset_control *reset;
+
+ if (!np) {
+ dev_err(&pdev->dev, "only DT-based devices are supported\n");
+ return -ENODEV;
+ }
+
+ reset = devm_reset_control_array_get_exclusive(&pdev->dev);
+ if (IS_ERR(reset))
+ return PTR_ERR(reset);
+
+ firmware = omap_rproc_get_firmware(pdev);
+ if (IS_ERR(firmware))
+ return PTR_ERR(firmware);
ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
if (ret) {
@@ -196,24 +1306,60 @@
return ret;
}
- rproc = rproc_alloc(&pdev->dev, pdata->name, &omap_rproc_ops,
- pdata->firmware, sizeof(*oproc));
+ rproc = rproc_alloc(&pdev->dev, dev_name(&pdev->dev), &omap_rproc_ops,
+ firmware, sizeof(*oproc));
if (!rproc)
return -ENOMEM;
oproc = rproc->priv;
oproc->rproc = rproc;
+ oproc->reset = reset;
/* All existing OMAP IPU and DSP processors have an MMU */
rproc->has_iommu = true;
+
+ ret = omap_rproc_of_get_internal_memories(pdev, rproc);
+ if (ret)
+ goto free_rproc;
+
+ ret = omap_rproc_get_boot_data(pdev, rproc);
+ if (ret)
+ goto free_rproc;
+
+ ret = omap_rproc_of_get_timers(pdev, rproc);
+ if (ret)
+ goto free_rproc;
+
+ init_completion(&oproc->pm_comp);
+ oproc->autosuspend_delay = DEFAULT_AUTOSUSPEND_DELAY;
+
+ of_property_read_u32(pdev->dev.of_node, "ti,autosuspend-delay-ms",
+ &oproc->autosuspend_delay);
+
+ pm_runtime_set_autosuspend_delay(&pdev->dev, oproc->autosuspend_delay);
+
+ oproc->fck = devm_clk_get(&pdev->dev, 0);
+ if (IS_ERR(oproc->fck)) {
+ ret = PTR_ERR(oproc->fck);
+ goto free_rproc;
+ }
+
+ ret = of_reserved_mem_device_init(&pdev->dev);
+ if (ret) {
+ dev_warn(&pdev->dev, "device does not have specific CMA pool.\n");
+ dev_warn(&pdev->dev, "Typically this should be provided,\n");
+ dev_warn(&pdev->dev, "only omit if you know what you are doing.\n");
+ }
platform_set_drvdata(pdev, rproc);
ret = rproc_add(rproc);
if (ret)
- goto free_rproc;
+ goto release_mem;
return 0;
+release_mem:
+ of_reserved_mem_device_release(&pdev->dev);
free_rproc:
rproc_free(rproc);
return ret;
@@ -225,15 +1371,24 @@
rproc_del(rproc);
rproc_free(rproc);
+ of_reserved_mem_device_release(&pdev->dev);
return 0;
}
+
+static const struct dev_pm_ops omap_rproc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(omap_rproc_suspend, omap_rproc_resume)
+ SET_RUNTIME_PM_OPS(omap_rproc_runtime_suspend,
+ omap_rproc_runtime_resume, NULL)
+};
static struct platform_driver omap_rproc_driver = {
.probe = omap_rproc_probe,
.remove = omap_rproc_remove,
.driver = {
.name = "omap-rproc",
+ .pm = &omap_rproc_pm_ops,
+ .of_match_table = omap_rproc_of_match,
},
};
--
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