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Message-ID: <20250103101231.1508151-10-b-padhi@ti.com>
Date: Fri, 3 Jan 2025 15:42:20 +0530
From: Beleswar Padhi <b-padhi@...com>
To: <andersson@...nel.org>, <mathieu.poirier@...aro.org>
CC: <afd@...com>, <hnagalla@...com>, <u-kumar1@...com>,
<p.zabel@...gutronix.de>, <jan.kiszka@...mens.com>,
<christophe.jaillet@...adoo.fr>, <jkangas@...hat.com>,
<eballetbo@...hat.com>, <b-padhi@...com>,
<linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 09/20] remoteproc: k3: Refactor .prepare rproc ops into common driver
The ti_k3_dsp_remoteproc.c driver asserts the local reset in probe and
releases the global reset in .prepare callback. Whereas, the
ti_k3_m4_remoteproc.c driver does both operations in .prepare callback,
which is more suitable as it ensures lreset is asserted for subsequent
core start operations from sysfs. Refactor the k3_m4_rproc_prepare()
function into the ti_k3_common.c driver as k3_rproc_prepare() and align
DSP and M4 drivers to register this common function as .prepare ops.
Signed-off-by: Beleswar Padhi <b-padhi@...com>
---
drivers/remoteproc/ti_k3_common.c | 46 +++++++++++++++++++++++
drivers/remoteproc/ti_k3_common.h | 1 +
drivers/remoteproc/ti_k3_dsp_remoteproc.c | 42 +--------------------
drivers/remoteproc/ti_k3_m4_remoteproc.c | 45 +---------------------
4 files changed, 49 insertions(+), 85 deletions(-)
diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
index a78abecf2756..699528e4a369 100644
--- a/drivers/remoteproc/ti_k3_common.c
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -205,5 +205,51 @@ int k3_rproc_request_mbox(struct rproc *rproc)
}
EXPORT_SYMBOL_GPL(k3_rproc_request_mbox);
+/*
+ * The K3 DSP and M4 cores have a local reset that affects only the CPU, and a
+ * generic module reset that powers on the device and allows the internal
+ * memories to be accessed while the local reset is asserted. This function is
+ * used to release the global reset on remote cores to allow loading into the
+ * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
+ * firmware loading, and is followed by the .start() ops after loading to
+ * actually let the remote cores to run.
+ */
+int k3_rproc_prepare(struct rproc *rproc)
+{
+ struct k3_rproc *kproc = rproc->priv;
+ struct device *dev = kproc->dev;
+ int ret;
+
+ /* If the core is running already no need to deassert the module reset */
+ if (rproc->state == RPROC_DETACHED)
+ return 0;
+
+ /*
+ * Ensure the local reset is asserted so the core doesn't
+ * execute bogus code when the module reset is released.
+ */
+ if (kproc->data->uses_lreset) {
+ ret = k3_rproc_reset(kproc);
+ if (ret)
+ return ret;
+
+ ret = reset_control_status(kproc->reset);
+ if (ret <= 0) {
+ dev_err(dev, "local reset still not asserted\n");
+ return ret;
+ }
+ }
+
+ ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+ kproc->ti_sci_id);
+ if (ret) {
+ dev_err(dev, "could not deassert module-reset for internal RAM loading\n");
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_prepare);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TI K3 common Remoteproc code");
diff --git a/drivers/remoteproc/ti_k3_common.h b/drivers/remoteproc/ti_k3_common.h
index 8e44c0455c39..22dd6e13f47a 100644
--- a/drivers/remoteproc/ti_k3_common.h
+++ b/drivers/remoteproc/ti_k3_common.h
@@ -93,4 +93,5 @@ void k3_rproc_kick(struct rproc *rproc, int vqid);
int k3_rproc_reset(struct k3_rproc *kproc);
int k3_rproc_release(struct k3_rproc *kproc);
int k3_rproc_request_mbox(struct rproc *rproc);
+int k3_rproc_prepare(struct rproc *rproc);
#endif /* REMOTEPROC_TI_K3_COMMON_H */
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
index c8bab63a4f4d..078bfb9aa233 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -24,31 +24,6 @@
#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
-/*
- * The C66x DSP cores have a local reset that affects only the CPU, and a
- * generic module reset that powers on the device and allows the DSP internal
- * memories to be accessed while the local reset is asserted. This function is
- * used to release the global reset on C66x DSPs to allow loading into the DSP
- * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
- * firmware loading, and is followed by the .start() ops after loading to
- * actually let the C66x DSP cores run. This callback is invoked only in
- * remoteproc mode.
- */
-static int k3_dsp_rproc_prepare(struct rproc *rproc)
-{
- struct k3_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- int ret;
-
- ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret)
- dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading (%pe)\n",
- ERR_PTR(ret));
-
- return ret;
-}
-
/*
* This function implements the .unprepare() ops and performs the complimentary
* operations to that of the .prepare() ops. The function is used to assert the
@@ -418,7 +393,7 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
rproc->has_iommu = false;
rproc->recovery_disabled = true;
if (data->uses_lreset) {
- rproc->ops->prepare = k3_dsp_rproc_prepare;
+ rproc->ops->prepare = k3_rproc_prepare;
rproc->ops->unprepare = k3_dsp_rproc_unprepare;
}
kproc = rproc->priv;
@@ -476,7 +451,6 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
dev_info(dev, "configured DSP for IPC-only mode\n");
rproc->state = RPROC_DETACHED;
/* override rproc ops with only required IPC-only mode ops */
- rproc->ops->prepare = NULL;
rproc->ops->unprepare = NULL;
rproc->ops->start = NULL;
rproc->ops->stop = NULL;
@@ -485,20 +459,6 @@ static int k3_dsp_rproc_probe(struct platform_device *pdev)
rproc->ops->get_loaded_rsc_table = k3_dsp_get_loaded_rsc_table;
} else {
dev_info(dev, "configured DSP for remoteproc mode\n");
- /*
- * ensure the DSP local reset is asserted to ensure the DSP
- * doesn't execute bogus code in .prepare() when the module
- * reset is released.
- */
- if (data->uses_lreset) {
- ret = reset_control_status(kproc->reset);
- if (ret < 0) {
- return dev_err_probe(dev, ret, "failed to get reset status\n");
- } else if (ret == 0) {
- dev_warn(dev, "local reset is deasserted for device\n");
- k3_rproc_reset(kproc);
- }
- }
}
ret = devm_rproc_add(dev, rproc);
diff --git a/drivers/remoteproc/ti_k3_m4_remoteproc.c b/drivers/remoteproc/ti_k3_m4_remoteproc.c
index 6dd93c8d0553..218d4bf941a1 100644
--- a/drivers/remoteproc/ti_k3_m4_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_m4_remoteproc.c
@@ -21,49 +21,6 @@
#include "ti_sci_proc.h"
#include "ti_k3_common.h"
-/*
- * The M4 cores have a local reset that affects only the CPU, and a
- * generic module reset that powers on the device and allows the internal
- * memories to be accessed while the local reset is asserted. This function is
- * used to release the global reset on remote cores to allow loading into the
- * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
- * firmware loading, and is followed by the .start() ops after loading to
- * actually let the remote cores to run.
- */
-static int k3_m4_rproc_prepare(struct rproc *rproc)
-{
- struct k3_rproc *kproc = rproc->priv;
- struct device *dev = kproc->dev;
- int ret;
-
- /* If the core is running already no need to deassert the module reset */
- if (rproc->state == RPROC_DETACHED)
- return 0;
-
- /*
- * Ensure the local reset is asserted so the core doesn't
- * execute bogus code when the module reset is released.
- */
- ret = k3_rproc_reset(kproc);
- if (ret)
- return ret;
-
- ret = reset_control_status(kproc->reset);
- if (ret <= 0) {
- dev_err(dev, "local reset still not asserted\n");
- return ret;
- }
-
- ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
- kproc->ti_sci_id);
- if (ret) {
- dev_err(dev, "could not deassert module-reset for internal RAM loading\n");
- return ret;
- }
-
- return 0;
-}
-
/*
* This function implements the .unprepare() ops and performs the complimentary
* operations to that of the .prepare() ops. The function is used to assert the
@@ -386,7 +343,7 @@ static int k3_m4_rproc_detach(struct rproc *rproc)
}
static const struct rproc_ops k3_m4_rproc_ops = {
- .prepare = k3_m4_rproc_prepare,
+ .prepare = k3_rproc_prepare,
.unprepare = k3_m4_rproc_unprepare,
.start = k3_m4_rproc_start,
.stop = k3_m4_rproc_stop,
--
2.34.1
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