aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-04-10 19:09:27 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2018-04-10 19:09:27 (GMT)
commit92589cbdda677a84ca5e485e1083c7d3bdcfc7b9 (patch)
tree3ba481707efe11a28d2cb27f8bacfde4224ad6cd
parent9ab89c407d904c284558bbcd285eb3baef9d8c07 (diff)
parent730b2ad8f72898029160a6832141ba954122a0c8 (diff)
downloadkernel_replicant_linux-92589cbdda677a84ca5e485e1083c7d3bdcfc7b9.zip
kernel_replicant_linux-92589cbdda677a84ca5e485e1083c7d3bdcfc7b9.tar.gz
kernel_replicant_linux-92589cbdda677a84ca5e485e1083c7d3bdcfc7b9.tar.bz2
Merge tag 'rproc-v4.17' of git://github.com/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson: - add support for generating coredumps for remoteprocs using devcoredump - add the Qualcomm sysmon driver for intra-remoteproc crash handling - a number of fixes in Qualcomm and IMX drivers * tag 'rproc-v4.17' of git://github.com/andersson/remoteproc: remoteproc: fix null pointer dereference on glink only platforms soc: qcom: qmi: add CONFIG_NET dependency remoteproc: imx_rproc: Slightly simplify code in 'imx_rproc_probe()' remoteproc: imx_rproc: Re-use existing error handling path in 'imx_rproc_probe()' remoteproc: imx_rproc: Fix an error handling path in 'imx_rproc_probe()' samples: Introduce Qualcomm QMI sample client remoteproc: qcom: Introduce sysmon remoteproc: Pass type of shutdown to subdev remove remoteproc: qcom: Register segments for core dump soc: qcom: mdt-loader: Return relocation base remoteproc: Rename "load_rsc_table" to "parse_fw" remoteproc: Add remote processor coredump support remoteproc: Remove null character write of shared mem
-rw-r--r--drivers/gpu/drm/msm/adreno/a5xx_gpu.c4
-rw-r--r--drivers/media/platform/qcom/venus/firmware.c2
-rw-r--r--drivers/remoteproc/Kconfig19
-rw-r--r--drivers/remoteproc/Makefile1
-rw-r--r--drivers/remoteproc/imx_rproc.c23
-rw-r--r--drivers/remoteproc/qcom_adsp_pil.c20
-rw-r--r--drivers/remoteproc/qcom_common.c56
-rw-r--r--drivers/remoteproc/qcom_common.h23
-rw-r--r--drivers/remoteproc/qcom_q6v5_pil.c9
-rw-r--r--drivers/remoteproc/qcom_sysmon.c579
-rw-r--r--drivers/remoteproc/qcom_wcnss.c11
-rw-r--r--drivers/remoteproc/remoteproc_core.c152
-rw-r--r--drivers/remoteproc/remoteproc_internal.h7
-rw-r--r--drivers/soc/qcom/Kconfig2
-rw-r--r--drivers/soc/qcom/mdt_loader.c7
-rw-r--r--include/linux/remoteproc.h27
-rw-r--r--include/linux/soc/qcom/mdt_loader.h3
-rw-r--r--samples/Kconfig10
-rw-r--r--samples/Makefile2
-rw-r--r--samples/qmi/Makefile1
-rw-r--r--samples/qmi/qmi_sample_client.c622
21 files changed, 1524 insertions, 56 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index a4f68af..d39400e 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -89,14 +89,14 @@ static int zap_shader_load_mdt(struct msm_gpu *gpu, const char *fwname)
*/
if (to_adreno_gpu(gpu)->fwloc == FW_LOCATION_LEGACY) {
ret = qcom_mdt_load(dev, fw, fwname, GPU_PAS_ID,
- mem_region, mem_phys, mem_size);
+ mem_region, mem_phys, mem_size, NULL);
} else {
char newname[strlen("qcom/") + strlen(fwname) + 1];
sprintf(newname, "qcom/%s", fwname);
ret = qcom_mdt_load(dev, fw, newname, GPU_PAS_ID,
- mem_region, mem_phys, mem_size);
+ mem_region, mem_phys, mem_size, NULL);
}
if (ret)
goto out;
diff --git a/drivers/media/platform/qcom/venus/firmware.c b/drivers/media/platform/qcom/venus/firmware.c
index 521d4b3..c4a5778 100644
--- a/drivers/media/platform/qcom/venus/firmware.c
+++ b/drivers/media/platform/qcom/venus/firmware.c
@@ -76,7 +76,7 @@ int venus_boot(struct device *dev, const char *fwname)
}
ret = qcom_mdt_load(dev, mdt, fwname, VENUS_PAS_ID, mem_va, mem_phys,
- mem_size);
+ mem_size, NULL);
release_firmware(mdt);
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index b609e1d..0272740 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -6,6 +6,7 @@ config REMOTEPROC
select CRC32
select FW_LOADER
select VIRTIO
+ select WANT_DEV_COREDUMP
help
Support for remote processors (such as DSP coprocessors). These
are mainly used on embedded systems.
@@ -90,6 +91,7 @@ config QCOM_ADSP_PIL
depends on QCOM_SMEM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+ depends on QCOM_SYSMON || QCOM_SYSMON=n
select MFD_SYSCON
select QCOM_MDT_LOADER
select QCOM_RPROC_COMMON
@@ -107,6 +109,7 @@ config QCOM_Q6V5_PIL
depends on QCOM_SMEM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+ depends on QCOM_SYSMON || QCOM_SYSMON=n
select MFD_SYSCON
select QCOM_RPROC_COMMON
select QCOM_SCM
@@ -114,12 +117,28 @@ config QCOM_Q6V5_PIL
Say y here to support the Qualcomm Peripherial Image Loader for the
Hexagon V5 based remote processors.
+config QCOM_SYSMON
+ tristate "Qualcomm sysmon driver"
+ depends on RPMSG
+ depends on ARCH_QCOM
+ depends on NET
+ select QCOM_QMI_HELPERS
+ help
+ The sysmon driver implements a sysmon QMI client and a handler for
+ the sys_mon SMD and GLINK channel, which are used for graceful
+ shutdown, retrieving failure information and propagating information
+ about other subsystems being shut down.
+
+ Say y here if your system runs firmware on any other subsystems, e.g.
+ modem or DSP.
+
config QCOM_WCNSS_PIL
tristate "Qualcomm WCNSS Peripheral Image Loader"
depends on OF && ARCH_QCOM
depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
depends on QCOM_SMEM
+ depends on QCOM_SYSMON || QCOM_SYSMON=n
select QCOM_MDT_LOADER
select QCOM_RPROC_COMMON
select QCOM_SCM
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 6e16450..02627ed 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_KEYSTONE_REMOTEPROC) += keystone_remoteproc.o
obj-$(CONFIG_QCOM_ADSP_PIL) += qcom_adsp_pil.o
obj-$(CONFIG_QCOM_RPROC_COMMON) += qcom_common.o
obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
+obj-$(CONFIG_QCOM_SYSMON) += qcom_sysmon.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss_pil.o
qcom_wcnss_pil-y += qcom_wcnss.o
qcom_wcnss_pil-y += qcom_wcnss_iris.o
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index 633268e..54c07fd 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -333,14 +333,14 @@ static int imx_rproc_probe(struct platform_device *pdev)
/* set some other name then imx */
rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
NULL, sizeof(*priv));
- if (!rproc) {
- ret = -ENOMEM;
- goto err;
- }
+ if (!rproc)
+ return -ENOMEM;
dcfg = of_device_get_match_data(dev);
- if (!dcfg)
- return -EINVAL;
+ if (!dcfg) {
+ ret = -EINVAL;
+ goto err_put_rproc;
+ }
priv = rproc->priv;
priv->rproc = rproc;
@@ -359,8 +359,8 @@ static int imx_rproc_probe(struct platform_device *pdev)
priv->clk = devm_clk_get(dev, NULL);
if (IS_ERR(priv->clk)) {
dev_err(dev, "Failed to get clock\n");
- rproc_free(rproc);
- return PTR_ERR(priv->clk);
+ ret = PTR_ERR(priv->clk);
+ goto err_put_rproc;
}
/*
@@ -370,8 +370,7 @@ static int imx_rproc_probe(struct platform_device *pdev)
ret = clk_prepare_enable(priv->clk);
if (ret) {
dev_err(&rproc->dev, "Failed to enable clock\n");
- rproc_free(rproc);
- return ret;
+ goto err_put_rproc;
}
ret = rproc_add(rproc);
@@ -380,13 +379,13 @@ static int imx_rproc_probe(struct platform_device *pdev)
goto err_put_clk;
}
- return ret;
+ return 0;
err_put_clk:
clk_disable_unprepare(priv->clk);
err_put_rproc:
rproc_free(rproc);
-err:
+
return ret;
}
diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c
index 373c167..89a86ce 100644
--- a/drivers/remoteproc/qcom_adsp_pil.c
+++ b/drivers/remoteproc/qcom_adsp_pil.c
@@ -38,7 +38,10 @@ struct adsp_data {
const char *firmware_name;
int pas_id;
bool has_aggre2_clk;
+
const char *ssr_name;
+ const char *sysmon_name;
+ int ssctl_id;
};
struct qcom_adsp {
@@ -75,6 +78,7 @@ struct qcom_adsp {
struct qcom_rproc_glink glink_subdev;
struct qcom_rproc_subdev smd_subdev;
struct qcom_rproc_ssr ssr_subdev;
+ struct qcom_sysmon *sysmon;
};
static int adsp_load(struct rproc *rproc, const struct firmware *fw)
@@ -82,7 +86,9 @@ static int adsp_load(struct rproc *rproc, const struct firmware *fw)
struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
return qcom_mdt_load(adsp->dev, fw, rproc->firmware, adsp->pas_id,
- adsp->mem_region, adsp->mem_phys, adsp->mem_size);
+ adsp->mem_region, adsp->mem_phys, adsp->mem_size,
+ &adsp->mem_reloc);
+
}
static int adsp_start(struct rproc *rproc)
@@ -177,6 +183,7 @@ static const struct rproc_ops adsp_ops = {
.start = adsp_start,
.stop = adsp_stop,
.da_to_va = adsp_da_to_va,
+ .parse_fw = qcom_register_dump_segments,
.load = adsp_load,
};
@@ -201,9 +208,6 @@ static irqreturn_t adsp_fatal_interrupt(int irq, void *dev)
rproc_report_crash(adsp->rproc, RPROC_FATAL_ERROR);
- if (!IS_ERR(msg))
- msg[0] = '\0';
-
return IRQ_HANDLED;
}
@@ -398,6 +402,9 @@ static int adsp_probe(struct platform_device *pdev)
qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
qcom_add_ssr_subdev(rproc, &adsp->ssr_subdev, desc->ssr_name);
+ adsp->sysmon = qcom_add_sysmon_subdev(rproc,
+ desc->sysmon_name,
+ desc->ssctl_id);
ret = rproc_add(rproc);
if (ret)
@@ -419,6 +426,7 @@ static int adsp_remove(struct platform_device *pdev)
rproc_del(adsp->rproc);
qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
+ qcom_remove_sysmon_subdev(adsp->sysmon);
qcom_remove_smd_subdev(adsp->rproc, &adsp->smd_subdev);
qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
rproc_free(adsp->rproc);
@@ -432,6 +440,8 @@ static const struct adsp_data adsp_resource_init = {
.pas_id = 1,
.has_aggre2_clk = false,
.ssr_name = "lpass",
+ .sysmon_name = "adsp",
+ .ssctl_id = 0x14,
};
static const struct adsp_data slpi_resource_init = {
@@ -440,6 +450,8 @@ static const struct adsp_data slpi_resource_init = {
.pas_id = 12,
.has_aggre2_clk = true,
.ssr_name = "dsps",
+ .sysmon_name = "slpi",
+ .ssctl_id = 0x16,
};
static const struct of_device_id adsp_of_match[] = {
diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
index 0060249..acfc99f 100644
--- a/drivers/remoteproc/qcom_common.c
+++ b/drivers/remoteproc/qcom_common.c
@@ -22,6 +22,7 @@
#include <linux/remoteproc.h>
#include <linux/rpmsg/qcom_glink.h>
#include <linux/rpmsg/qcom_smd.h>
+#include <linux/soc/qcom/mdt_loader.h>
#include "remoteproc_internal.h"
#include "qcom_common.h"
@@ -41,7 +42,7 @@ static int glink_subdev_probe(struct rproc_subdev *subdev)
return PTR_ERR_OR_ZERO(glink->edge);
}
-static void glink_subdev_remove(struct rproc_subdev *subdev)
+static void glink_subdev_remove(struct rproc_subdev *subdev, bool crashed)
{
struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
@@ -74,11 +75,57 @@ EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);
*/
void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
{
+ if (!glink->node)
+ return;
+
rproc_remove_subdev(rproc, &glink->subdev);
of_node_put(glink->node);
}
EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);
+/**
+ * qcom_register_dump_segments() - register segments for coredump
+ * @rproc: remoteproc handle
+ * @fw: firmware header
+ *
+ * Register all segments of the ELF in the remoteproc coredump segment list
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
+int qcom_register_dump_segments(struct rproc *rproc,
+ const struct firmware *fw)
+{
+ const struct elf32_phdr *phdrs;
+ const struct elf32_phdr *phdr;
+ const struct elf32_hdr *ehdr;
+ int ret;
+ int i;
+
+ ehdr = (struct elf32_hdr *)fw->data;
+ phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+ for (i = 0; i < ehdr->e_phnum; i++) {
+ phdr = &phdrs[i];
+
+ if (phdr->p_type != PT_LOAD)
+ continue;
+
+ if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
+ continue;
+
+ if (!phdr->p_memsz)
+ continue;
+
+ ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,
+ phdr->p_memsz);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_register_dump_segments);
+
static int smd_subdev_probe(struct rproc_subdev *subdev)
{
struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
@@ -88,7 +135,7 @@ static int smd_subdev_probe(struct rproc_subdev *subdev)
return PTR_ERR_OR_ZERO(smd->edge);
}
-static void smd_subdev_remove(struct rproc_subdev *subdev)
+static void smd_subdev_remove(struct rproc_subdev *subdev, bool crashed)
{
struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
@@ -121,6 +168,9 @@ EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);
*/
void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
{
+ if (!smd->node)
+ return;
+
rproc_remove_subdev(rproc, &smd->subdev);
of_node_put(smd->node);
}
@@ -157,7 +207,7 @@ static int ssr_notify_start(struct rproc_subdev *subdev)
return 0;
}
-static void ssr_notify_stop(struct rproc_subdev *subdev)
+static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed)
{
struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
diff --git a/drivers/remoteproc/qcom_common.h b/drivers/remoteproc/qcom_common.h
index 728be98..58de71e 100644
--- a/drivers/remoteproc/qcom_common.h
+++ b/drivers/remoteproc/qcom_common.h
@@ -4,6 +4,9 @@
#include <linux/remoteproc.h>
#include "remoteproc_internal.h"
+#include <linux/soc/qcom/qmi.h>
+
+struct qcom_sysmon;
struct qcom_rproc_glink {
struct rproc_subdev subdev;
@@ -30,6 +33,8 @@ struct qcom_rproc_ssr {
void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
+int qcom_register_dump_segments(struct rproc *rproc, const struct firmware *fw);
+
void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);
void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);
@@ -37,4 +42,22 @@ void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
const char *ssr_name);
void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr);
+#if IS_ENABLED(CONFIG_QCOM_SYSMON)
+struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+ const char *name,
+ int ssctl_instance);
+void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon);
+#else
+static inline struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+ const char *name,
+ int ssctl_instance)
+{
+ return NULL;
+}
+
+static inline void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon)
+{
+}
+#endif
+
#endif
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index b4e5e72..8e70a62 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -168,6 +168,7 @@ struct q6v5 {
struct qcom_rproc_subdev smd_subdev;
struct qcom_rproc_ssr ssr_subdev;
+ struct qcom_sysmon *sysmon;
bool need_mem_protection;
int mpss_perm;
int mba_perm;
@@ -939,9 +940,6 @@ static irqreturn_t q6v5_wdog_interrupt(int irq, void *dev)
rproc_report_crash(qproc->rproc, RPROC_WATCHDOG);
- if (!IS_ERR(msg))
- msg[0] = '\0';
-
return IRQ_HANDLED;
}
@@ -959,9 +957,6 @@ static irqreturn_t q6v5_fatal_interrupt(int irq, void *dev)
rproc_report_crash(qproc->rproc, RPROC_FATAL_ERROR);
- if (!IS_ERR(msg))
- msg[0] = '\0';
-
return IRQ_HANDLED;
}
@@ -1215,6 +1210,7 @@ static int q6v5_probe(struct platform_device *pdev)
qproc->mba_perm = BIT(QCOM_SCM_VMID_HLOS);
qcom_add_smd_subdev(rproc, &qproc->smd_subdev);
qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss");
+ qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
ret = rproc_add(rproc);
if (ret)
@@ -1234,6 +1230,7 @@ static int q6v5_remove(struct platform_device *pdev)
rproc_del(qproc->rproc);
+ qcom_remove_sysmon_subdev(qproc->sysmon);
qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
rproc_free(qproc->rproc);
diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
new file mode 100644
index 0000000..f085545
--- /dev/null
+++ b/drivers/remoteproc/qcom_sysmon.c
@@ -0,0 +1,579 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2017, Linaro Ltd.
+ */
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc/qcom_rproc.h>
+#include <linux/rpmsg.h>
+
+#include "qcom_common.h"
+
+static BLOCKING_NOTIFIER_HEAD(sysmon_notifiers);
+
+struct qcom_sysmon {
+ struct rproc_subdev subdev;
+ struct rproc *rproc;
+
+ struct list_head node;
+
+ const char *name;
+
+ int ssctl_version;
+ int ssctl_instance;
+
+ struct notifier_block nb;
+
+ struct device *dev;
+
+ struct rpmsg_endpoint *ept;
+ struct completion comp;
+ struct mutex lock;
+
+ bool ssr_ack;
+
+ struct qmi_handle qmi;
+ struct sockaddr_qrtr ssctl;
+};
+
+static DEFINE_MUTEX(sysmon_lock);
+static LIST_HEAD(sysmon_list);
+
+/**
+ * sysmon_send_event() - send notification of other remote's SSR event
+ * @sysmon: sysmon context
+ * @name: other remote's name
+ */
+static void sysmon_send_event(struct qcom_sysmon *sysmon, const char *name)
+{
+ char req[50];
+ int len;
+ int ret;
+
+ len = snprintf(req, sizeof(req), "ssr:%s:before_shutdown", name);
+ if (len >= sizeof(req))
+ return;
+
+ mutex_lock(&sysmon->lock);
+ reinit_completion(&sysmon->comp);
+ sysmon->ssr_ack = false;
+
+ ret = rpmsg_send(sysmon->ept, req, len);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to send sysmon event\n");
+ goto out_unlock;
+ }
+
+ ret = wait_for_completion_timeout(&sysmon->comp,
+ msecs_to_jiffies(5000));
+ if (!ret) {
+ dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
+ goto out_unlock;
+ }
+
+ if (!sysmon->ssr_ack)
+ dev_err(sysmon->dev, "unexpected response to sysmon event\n");
+
+out_unlock:
+ mutex_unlock(&sysmon->lock);
+}
+
+/**
+ * sysmon_request_shutdown() - request graceful shutdown of remote
+ * @sysmon: sysmon context
+ */
+static void sysmon_request_shutdown(struct qcom_sysmon *sysmon)
+{
+ char *req = "ssr:shutdown";
+ int ret;
+
+ mutex_lock(&sysmon->lock);
+ reinit_completion(&sysmon->comp);
+ sysmon->ssr_ack = false;
+
+ ret = rpmsg_send(sysmon->ept, req, strlen(req) + 1);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "send sysmon shutdown request failed\n");
+ goto out_unlock;
+ }
+
+ ret = wait_for_completion_timeout(&sysmon->comp,
+ msecs_to_jiffies(5000));
+ if (!ret) {
+ dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
+ goto out_unlock;
+ }
+
+ if (!sysmon->ssr_ack)
+ dev_err(sysmon->dev,
+ "unexpected response to sysmon shutdown request\n");
+
+out_unlock:
+ mutex_unlock(&sysmon->lock);
+}
+
+static int sysmon_callback(struct rpmsg_device *rpdev, void *data, int count,
+ void *priv, u32 addr)
+{
+ struct qcom_sysmon *sysmon = priv;
+ const char *ssr_ack = "ssr:ack";
+ const int ssr_ack_len = strlen(ssr_ack) + 1;
+
+ if (!sysmon)
+ return -EINVAL;
+
+ if (count >= ssr_ack_len && !memcmp(data, ssr_ack, ssr_ack_len))
+ sysmon->ssr_ack = true;
+
+ complete(&sysmon->comp);
+
+ return 0;
+}
+
+#define SSCTL_SHUTDOWN_REQ 0x21
+#define SSCTL_SUBSYS_EVENT_REQ 0x23
+
+#define SSCTL_MAX_MSG_LEN 7
+
+#define SSCTL_SUBSYS_NAME_LENGTH 15
+
+enum {
+ SSCTL_SSR_EVENT_BEFORE_POWERUP,
+ SSCTL_SSR_EVENT_AFTER_POWERUP,
+ SSCTL_SSR_EVENT_BEFORE_SHUTDOWN,
+ SSCTL_SSR_EVENT_AFTER_SHUTDOWN,
+};
+
+enum {
+ SSCTL_SSR_EVENT_FORCED,
+ SSCTL_SSR_EVENT_GRACEFUL,
+};
+
+struct ssctl_shutdown_resp {
+ struct qmi_response_type_v01 resp;
+};
+
+static struct qmi_elem_info ssctl_shutdown_resp_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x02,
+ .offset = offsetof(struct ssctl_shutdown_resp, resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {}
+};
+
+struct ssctl_subsys_event_req {
+ u8 subsys_name_len;
+ char subsys_name[SSCTL_SUBSYS_NAME_LENGTH];
+ u32 event;
+ u8 evt_driven_valid;
+ u32 evt_driven;
+};
+
+static struct qmi_elem_info ssctl_subsys_event_req_ei[] = {
+ {
+ .data_type = QMI_DATA_LEN,
+ .elem_len = 1,
+ .elem_size = sizeof(uint8_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x01,
+ .offset = offsetof(struct ssctl_subsys_event_req,
+ subsys_name_len),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = SSCTL_SUBSYS_NAME_LENGTH,
+ .elem_size = sizeof(char),
+ .array_type = VAR_LEN_ARRAY,
+ .tlv_type = 0x01,
+ .offset = offsetof(struct ssctl_subsys_event_req,
+ subsys_name),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_SIGNED_4_BYTE_ENUM,
+ .elem_len = 1,
+ .elem_size = sizeof(uint32_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x02,
+ .offset = offsetof(struct ssctl_subsys_event_req,
+ event),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(uint8_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct ssctl_subsys_event_req,
+ evt_driven_valid),
+ .ei_array = NULL,
+ },
+ {
+ .data_type = QMI_SIGNED_4_BYTE_ENUM,
+ .elem_len = 1,
+ .elem_size = sizeof(uint32_t),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x10,
+ .offset = offsetof(struct ssctl_subsys_event_req,
+ evt_driven),
+ .ei_array = NULL,
+ },
+ {}
+};
+
+struct ssctl_subsys_event_resp {
+ struct qmi_response_type_v01 resp;
+};
+
+static struct qmi_elem_info ssctl_subsys_event_resp_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = 0x02,
+ .offset = offsetof(struct ssctl_subsys_event_resp,
+ resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {}
+};
+
+/**
+ * ssctl_request_shutdown() - request shutdown via SSCTL QMI service
+ * @sysmon: sysmon context
+ */
+static void ssctl_request_shutdown(struct qcom_sysmon *sysmon)
+{
+ struct ssctl_shutdown_resp resp;
+ struct qmi_txn txn;
+ int ret;
+
+ ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_shutdown_resp_ei, &resp);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to allocate QMI txn\n");
+ return;
+ }
+
+ ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
+ SSCTL_SHUTDOWN_REQ, 0, NULL, NULL);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to send shutdown request\n");
+ qmi_txn_cancel(&txn);
+ return;
+ }
+
+ ret = qmi_txn_wait(&txn, 5 * HZ);
+ if (ret < 0)
+ dev_err(sysmon->dev, "failed receiving QMI response\n");
+ else if (resp.resp.result)
+ dev_err(sysmon->dev, "shutdown request failed\n");
+ else
+ dev_dbg(sysmon->dev, "shutdown request completed\n");
+}
+
+/**
+ * ssctl_send_event() - send notification of other remote's SSR event
+ * @sysmon: sysmon context
+ * @name: other remote's name
+ */
+static void ssctl_send_event(struct qcom_sysmon *sysmon, const char *name)
+{
+ struct ssctl_subsys_event_resp resp;
+ struct ssctl_subsys_event_req req;
+ struct qmi_txn txn;
+ int ret;
+
+ memset(&resp, 0, sizeof(resp));
+ ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_subsys_event_resp_ei, &resp);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to allocate QMI txn\n");
+ return;
+ }
+
+ memset(&req, 0, sizeof(req));
+ strlcpy(req.subsys_name, name, sizeof(req.subsys_name));
+ req.subsys_name_len = strlen(req.subsys_name);
+ req.event = SSCTL_SSR_EVENT_BEFORE_SHUTDOWN;
+ req.evt_driven_valid = true;
+ req.evt_driven = SSCTL_SSR_EVENT_FORCED;
+
+ ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
+ SSCTL_SUBSYS_EVENT_REQ, 40,
+ ssctl_subsys_event_req_ei, &req);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to send shutdown request\n");
+ qmi_txn_cancel(&txn);
+ return;
+ }
+
+ ret = qmi_txn_wait(&txn, 5 * HZ);
+ if (ret < 0)
+ dev_err(sysmon->dev, "failed receiving QMI response\n");
+ else if (resp.resp.result)
+ dev_err(sysmon->dev, "ssr event send failed\n");
+ else
+ dev_dbg(sysmon->dev, "ssr event send completed\n");
+}
+
+/**
+ * ssctl_new_server() - QMI callback indicating a new service
+ * @qmi: QMI handle
+ * @svc: service information
+ *
+ * Return: 0 if we're interested in this service, -EINVAL otherwise.
+ */
+static int ssctl_new_server(struct qmi_handle *qmi, struct qmi_service *svc)
+{
+ struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi);
+
+ switch (svc->version) {
+ case 1:
+ if (svc->instance != 0)
+ return -EINVAL;
+ if (strcmp(sysmon->name, "modem"))
+ return -EINVAL;
+ break;
+ case 2:
+ if (svc->instance != sysmon->ssctl_instance)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ sysmon->ssctl_version = svc->version;
+
+ sysmon->ssctl.sq_family = AF_QIPCRTR;
+ sysmon->ssctl.sq_node = svc->node;
+ sysmon->ssctl.sq_port = svc->port;
+
+ svc->priv = sysmon;
+
+ return 0;
+}
+
+/**
+ * ssctl_del_server() - QMI callback indicating that @svc is removed
+ * @qmi: QMI handle
+ * @svc: service information
+ */
+static void ssctl_del_server(struct qmi_handle *qmi, struct qmi_service *svc)
+{
+ struct qcom_sysmon *sysmon = svc->priv;
+
+ sysmon->ssctl_version = 0;
+}
+
+static const struct qmi_ops ssctl_ops = {
+ .new_server = ssctl_new_server,
+ .del_server = ssctl_del_server,
+};
+
+static int sysmon_start(struct rproc_subdev *subdev)
+{
+ return 0;
+}
+
+static void sysmon_stop(struct rproc_subdev *subdev, bool crashed)
+{
+ struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, subdev);
+
+ blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)sysmon->name);
+
+ /* Don't request graceful shutdown if we've crashed */
+ if (crashed)
+ return;
+
+ if (sysmon->ssctl_version)
+ ssctl_request_shutdown(sysmon);
+ else if (sysmon->ept)
+ sysmon_request_shutdown(sysmon);
+}
+
+/**
+ * sysmon_notify() - notify sysmon target of another's SSR
+ * @nb: notifier_block associated with sysmon instance
+ * @event: unused
+ * @data: SSR identifier of the remote that is going down
+ */
+static int sysmon_notify(struct notifier_block *nb, unsigned long event,
+ void *data)
+{
+ struct qcom_sysmon *sysmon = container_of(nb, struct qcom_sysmon, nb);
+ struct rproc *rproc = sysmon->rproc;
+ const char *ssr_name = data;
+
+ /* Skip non-running rprocs and the originating instance */
+ if (rproc->state != RPROC_RUNNING || !strcmp(data, sysmon->name)) {
+ dev_dbg(sysmon->dev, "not notifying %s\n", sysmon->name);
+ return NOTIFY_DONE;
+ }
+
+ /* Only SSCTL version 2 supports SSR events */
+ if (sysmon->ssctl_version == 2)
+ ssctl_send_event(sysmon, ssr_name);
+ else if (sysmon->ept)
+ sysmon_send_event(sysmon, ssr_name);
+
+ return NOTIFY_DONE;
+}
+
+/**
+ * qcom_add_sysmon_subdev() - create a sysmon subdev for the given remoteproc
+ * @rproc: rproc context to associate the subdev with
+ * @name: name of this subdev, to use in SSR
+ * @ssctl_instance: instance id of the ssctl QMI service
+ *
+ * Return: A new qcom_sysmon object, or NULL on failure
+ */
+struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+ const char *name,
+ int ssctl_instance)
+{
+ struct qcom_sysmon *sysmon;
+ int ret;
+
+ sysmon = kzalloc(sizeof(*sysmon), GFP_KERNEL);
+ if (!sysmon)
+ return NULL;
+
+ sysmon->dev = rproc->dev.parent;
+ sysmon->rproc = rproc;
+
+ sysmon->name = name;
+ sysmon->ssctl_instance = ssctl_instance;
+
+ init_completion(&sysmon->comp);
+ mutex_init(&sysmon->lock);
+
+ ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops, NULL);
+ if (ret < 0) {
+ dev_err(sysmon->dev, "failed to initialize qmi handle\n");
+ kfree(sysmon);
+ return NULL;
+ }
+
+ qmi_add_lookup(&sysmon->qmi, 43, 0, 0);
+
+ rproc_add_subdev(rproc, &sysmon->subdev, sysmon_start, sysmon_stop);
+
+ sysmon->nb.notifier_call = sysmon_notify;
+ blocking_notifier_chain_register(&sysmon_notifiers, &sysmon->nb);
+
+ mutex_lock(&sysmon_lock);
+ list_add(&sysmon->node, &sysmon_list);
+ mutex_unlock(&sysmon_lock);
+
+ return sysmon;
+}
+EXPORT_SYMBOL_GPL(qcom_add_sysmon_subdev);
+
+/**
+ * qcom_remove_sysmon_subdev() - release a qcom_sysmon
+ * @sysmon: sysmon context, as retrieved by qcom_add_sysmon_subdev()
+ */
+void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon)
+{
+ if (!sysmon)
+ return;
+
+ mutex_lock(&sysmon_lock);
+ list_del(&sysmon->node);
+ mutex_unlock(&sysmon_lock);
+
+ blocking_notifier_chain_unregister(&sysmon_notifiers, &sysmon->nb);
+
+ rproc_remove_subdev(sysmon->rproc, &sysmon->subdev);
+
+ qmi_handle_release(&sysmon->qmi);
+
+ kfree(sysmon);
+}
+EXPORT_SYMBOL_GPL(qcom_remove_sysmon_subdev);
+
+/**
+ * sysmon_probe() - probe sys_mon channel
+ * @rpdev: rpmsg device handle
+ *
+ * Find the sysmon context associated with the ancestor remoteproc and assign
+ * this rpmsg device with said sysmon context.
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
+static int sysmon_probe(struct rpmsg_device *rpdev)
+{
+ struct qcom_sysmon *sysmon;
+ struct rproc *rproc;
+
+ rproc = rproc_get_by_child(&rpdev->dev);
+ if (!rproc) {
+ dev_err(&rpdev->dev, "sysmon device not child of rproc\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&sysmon_lock);
+ list_for_each_entry(sysmon, &sysmon_list, node) {
+ if (sysmon->rproc == rproc)
+ goto found;
+ }
+ mutex_unlock(&sysmon_lock);
+
+ dev_err(&rpdev->dev, "no sysmon associated with parent rproc\n");
+
+ return -EINVAL;
+
+found:
+ mutex_unlock(&sysmon_lock);
+
+ rpdev->ept->priv = sysmon;
+ sysmon->ept = rpdev->ept;
+
+ return 0;
+}
+
+/**
+ * sysmon_remove() - sys_mon channel remove handler
+ * @rpdev: rpmsg device handle
+ *
+ * Disassociate the rpmsg device with the sysmon instance.
+ */
+static void sysmon_remove(struct rpmsg_device *rpdev)
+{
+ struct qcom_sysmon *sysmon = rpdev->ept->priv;
+
+ sysmon->ept = NULL;
+}
+
+static const struct rpmsg_device_id sysmon_match[] = {
+ { "sys_mon" },
+ {}
+};
+
+static struct rpmsg_driver sysmon_driver = {
+ .probe = sysmon_probe,
+ .remove = sysmon_remove,
+ .callback = sysmon_callback,
+ .id_table = sysmon_match,
+ .drv = {
+ .name = "qcom_sysmon",
+ },
+};
+
+module_rpmsg_driver(sysmon_driver);
+
+MODULE_DESCRIPTION("Qualcomm sysmon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
index 3f06092..b0e07e9 100644
--- a/drivers/remoteproc/qcom_wcnss.c
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -40,6 +40,7 @@
#define WCNSS_CRASH_REASON_SMEM 422
#define WCNSS_FIRMWARE_NAME "wcnss.mdt"
#define WCNSS_PAS_ID 6
+#define WCNSS_SSCTL_ID 0x13
#define WCNSS_SPARE_NVBIN_DLND BIT(25)
@@ -98,6 +99,7 @@ struct qcom_wcnss {
size_t mem_size;
struct qcom_rproc_subdev smd_subdev;
+ struct qcom_sysmon *sysmon;
};
static const struct wcnss_data riva_data = {
@@ -153,7 +155,8 @@ static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
return qcom_mdt_load(wcnss->dev, fw, rproc->firmware, WCNSS_PAS_ID,
- wcnss->mem_region, wcnss->mem_phys, wcnss->mem_size);
+ wcnss->mem_region, wcnss->mem_phys,
+ wcnss->mem_size, &wcnss->mem_reloc);
}
static void wcnss_indicate_nv_download(struct qcom_wcnss *wcnss)
@@ -308,6 +311,7 @@ static const struct rproc_ops wcnss_ops = {
.start = wcnss_start,
.stop = wcnss_stop,
.da_to_va = wcnss_da_to_va,
+ .parse_fw = qcom_register_dump_segments,
.load = wcnss_load,
};
@@ -332,9 +336,6 @@ static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
- if (!IS_ERR(msg))
- msg[0] = '\0';
-
return IRQ_HANDLED;
}
@@ -551,6 +552,7 @@ static int wcnss_probe(struct platform_device *pdev)
}
qcom_add_smd_subdev(rproc, &wcnss->smd_subdev);
+ wcnss->sysmon = qcom_add_sysmon_subdev(rproc, "wcnss", WCNSS_SSCTL_ID);
ret = rproc_add(rproc);
if (ret)
@@ -573,6 +575,7 @@ static int wcnss_remove(struct platform_device *pdev)
qcom_smem_state_put(wcnss->state);
rproc_del(wcnss->rproc);
+ qcom_remove_sysmon_subdev(wcnss->sysmon);
qcom_remove_smd_subdev(wcnss->rproc, &wcnss->smd_subdev);
rproc_free(wcnss->rproc);
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 4170dfb..6d9c583 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -33,6 +33,7 @@
#include <linux/firmware.h>
#include <linux/string.h>
#include <linux/debugfs.h>
+#include <linux/devcoredump.h>
#include <linux/remoteproc.h>
#include <linux/iommu.h>
#include <linux/idr.h>
@@ -307,7 +308,7 @@ static int rproc_vdev_do_probe(struct rproc_subdev *subdev)
return rproc_add_virtio_dev(rvdev, rvdev->id);
}
-static void rproc_vdev_do_remove(struct rproc_subdev *subdev)
+static void rproc_vdev_do_remove(struct rproc_subdev *subdev, bool crashed)
{
struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
@@ -788,17 +789,31 @@ static int rproc_probe_subdevices(struct rproc *rproc)
unroll_registration:
list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node)
- subdev->remove(subdev);
+ subdev->remove(subdev, true);
return ret;
}
-static void rproc_remove_subdevices(struct rproc *rproc)
+static void rproc_remove_subdevices(struct rproc *rproc, bool crashed)
{
struct rproc_subdev *subdev;
list_for_each_entry_reverse(subdev, &rproc->subdevs, node)
- subdev->remove(subdev);
+ subdev->remove(subdev, crashed);
+}
+
+/**
+ * rproc_coredump_cleanup() - clean up dump_segments list
+ * @rproc: the remote processor handle
+ */
+static void rproc_coredump_cleanup(struct rproc *rproc)
+{
+ struct rproc_dump_segment *entry, *tmp;
+
+ list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {
+ list_del(&entry->node);
+ kfree(entry);
+ }
}
/**
@@ -848,6 +863,8 @@ static void rproc_resource_cleanup(struct rproc *rproc)
/* clean up remote vdev entries */
list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
kref_put(&rvdev->refcount, rproc_vdev_release);
+
+ rproc_coredump_cleanup(rproc);
}
static int rproc_start(struct rproc *rproc, const struct firmware *fw)
@@ -927,8 +944,8 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
rproc->bootaddr = rproc_get_boot_addr(rproc, fw);
- /* load resource table */
- ret = rproc_load_rsc_table(rproc, fw);
+ /* Load resource table, core dump segment list etc from the firmware */
+ ret = rproc_parse_fw(rproc, fw);
if (ret)
goto disable_iommu;
@@ -992,13 +1009,13 @@ static int rproc_trigger_auto_boot(struct rproc *rproc)
return ret;
}
-static int rproc_stop(struct rproc *rproc)
+static int rproc_stop(struct rproc *rproc, bool crashed)
{
struct device *dev = &rproc->dev;
int ret;
/* remove any subdevices for the remote processor */
- rproc_remove_subdevices(rproc);
+ rproc_remove_subdevices(rproc, crashed);
/* the installed resource table is no longer accessible */
rproc->table_ptr = rproc->cached_table;
@@ -1018,6 +1035,113 @@ static int rproc_stop(struct rproc *rproc)
}
/**
+ * rproc_coredump_add_segment() - add segment of device memory to coredump
+ * @rproc: handle of a remote processor
+ * @da: device address
+ * @size: size of segment
+ *
+ * Add device memory to the list of segments to be included in a coredump for
+ * the remoteproc.
+ *
+ * Return: 0 on success, negative errno on error.
+ */
+int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size)
+{
+ struct rproc_dump_segment *segment;
+
+ segment = kzalloc(sizeof(*segment), GFP_KERNEL);
+ if (!segment)
+ return -ENOMEM;
+
+ segment->da = da;
+ segment->size = size;
+
+ list_add_tail(&segment->node, &rproc->dump_segments);
+
+ return 0;
+}
+EXPORT_SYMBOL(rproc_coredump_add_segment);
+
+/**
+ * rproc_coredump() - perform coredump
+ * @rproc: rproc handle
+ *
+ * This function will generate an ELF header for the registered segments
+ * and create a devcoredump device associated with rproc.
+ */
+static void rproc_coredump(struct rproc *rproc)
+{
+ struct rproc_dump_segment *segment;
+ struct elf32_phdr *phdr;
+ struct elf32_hdr *ehdr;
+ size_t data_size;
+ size_t offset;
+ void *data;
+ void *ptr;
+ int phnum = 0;
+
+ if (list_empty(&rproc->dump_segments))
+ return;
+
+ data_size = sizeof(*ehdr);
+ list_for_each_entry(segment, &rproc->dump_segments, node) {
+ data_size += sizeof(*phdr) + segment->size;
+
+ phnum++;
+ }
+
+ data = vmalloc(data_size);
+ if (!data)
+ return;
+
+ ehdr = data;
+
+ memset(ehdr, 0, sizeof(*ehdr));
+ memcpy(ehdr->e_ident, ELFMAG, SELFMAG);
+ ehdr->e_ident[EI_CLASS] = ELFCLASS32;
+ ehdr->e_ident[EI_DATA] = ELFDATA2LSB;
+ ehdr->e_ident[EI_VERSION] = EV_CURRENT;
+ ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE;
+ ehdr->e_type = ET_CORE;
+ ehdr->e_machine = EM_NONE;
+ ehdr->e_version = EV_CURRENT;
+ ehdr->e_entry = rproc->bootaddr;
+ ehdr->e_phoff = sizeof(*ehdr);
+ ehdr->e_ehsize = sizeof(*ehdr);
+ ehdr->e_phentsize = sizeof(*phdr);
+ ehdr->e_phnum = phnum;
+
+ phdr = data + ehdr->e_phoff;
+ offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum;
+ list_for_each_entry(segment, &rproc->dump_segments, node) {
+ memset(phdr, 0, sizeof(*phdr));
+ phdr->p_type = PT_LOAD;
+ phdr->p_offset = offset;
+ phdr->p_vaddr = segment->da;
+ phdr->p_paddr = segment->da;
+ phdr->p_filesz = segment->size;
+ phdr->p_memsz = segment->size;
+ phdr->p_flags = PF_R | PF_W | PF_X;
+ phdr->p_align = 0;
+
+ ptr = rproc_da_to_va(rproc, segment->da, segment->size);
+ if (!ptr) {
+ dev_err(&rproc->dev,
+ "invalid coredump segment (%pad, %zu)\n",
+ &segment->da, segment->size);
+ memset(data + offset, 0xff, segment->size);
+ } else {
+ memcpy(data + offset, ptr, segment->size);
+ }
+
+ offset += phdr->p_filesz;
+ phdr++;
+ }
+
+ dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
+}
+
+/**
* rproc_trigger_recovery() - recover a remoteproc
* @rproc: the remote processor
*
@@ -1039,10 +1163,13 @@ int rproc_trigger_recovery(struct rproc *rproc)
if (ret)
return ret;
- ret = rproc_stop(rproc);
+ ret = rproc_stop(rproc, false);
if (ret)
goto unlock_mutex;
+ /* generate coredump */
+ rproc_coredump(rproc);
+
/* load firmware */
ret = request_firmware(&firmware_p, rproc->firmware, dev);
if (ret < 0) {
@@ -1189,7 +1316,7 @@ void rproc_shutdown(struct rproc *rproc)
if (!atomic_dec_and_test(&rproc->power))
goto out;
- ret = rproc_stop(rproc);
+ ret = rproc_stop(rproc, true);
if (ret) {
atomic_inc(&rproc->power);
goto out;
@@ -1428,7 +1555,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
/* Default to ELF loader if no load function is specified */
if (!rproc->ops->load) {
rproc->ops->load = rproc_elf_load_segments;
- rproc->ops->load_rsc_table = rproc_elf_load_rsc_table;
+ rproc->ops->parse_fw = rproc_elf_load_rsc_table;
rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
rproc->ops->sanity_check = rproc_elf_sanity_check;
rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
@@ -1443,6 +1570,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
INIT_LIST_HEAD(&rproc->traces);
INIT_LIST_HEAD(&rproc->rvdevs);
INIT_LIST_HEAD(&rproc->subdevs);
+ INIT_LIST_HEAD(&rproc->dump_segments);
INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work);
@@ -1535,7 +1663,7 @@ EXPORT_SYMBOL(rproc_del);
void rproc_add_subdev(struct rproc *rproc,
struct rproc_subdev *subdev,
int (*probe)(struct rproc_subdev *subdev),
- void (*remove)(struct rproc_subdev *subdev))
+ void (*remove)(struct rproc_subdev *subdev, bool crashed))
{
subdev->probe = probe;
subdev->remove = remove;
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 55a2950..7570beb 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -88,11 +88,10 @@ int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
return -EINVAL;
}
-static inline int rproc_load_rsc_table(struct rproc *rproc,
- const struct firmware *fw)
+static inline int rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
{
- if (rproc->ops->load_rsc_table)
- return rproc->ops->load_rsc_table(rproc, fw);
+ if (rproc->ops->parse_fw)
+ return rproc->ops->parse_fw(rproc, fw);
return 0;
}
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index a993d19..5c4535b 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -37,7 +37,7 @@ config QCOM_PM
config QCOM_QMI_HELPERS
tristate
- depends on ARCH_QCOM
+ depends on ARCH_QCOM && NET
help
Helper library for handling QMI encoded messages. QMI encoded
messages are used in communication between the majority of QRTR
diff --git a/drivers/soc/qcom/mdt_loader.c b/drivers/soc/qcom/mdt_loader.c
index 08bd854..17b314d 100644
--- a/drivers/soc/qcom/mdt_loader.c
+++ b/drivers/soc/qcom/mdt_loader.c
@@ -83,12 +83,14 @@ EXPORT_SYMBOL_GPL(qcom_mdt_get_size);
* @mem_region: allocated memory region to load firmware into
* @mem_phys: physical address of allocated memory region
* @mem_size: size of the allocated memory region
+ * @reloc_base: adjusted physical address after relocation
*
* Returns 0 on success, negative errno otherwise.
*/
int qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *firmware, int pas_id, void *mem_region,
- phys_addr_t mem_phys, size_t mem_size)
+ phys_addr_t mem_phys, size_t mem_size,
+ phys_addr_t *reloc_base)
{
const struct elf32_phdr *phdrs;
const struct elf32_phdr *phdr;
@@ -192,6 +194,9 @@ int qcom_mdt_load(struct device *dev, const struct firmware *fw,
memset(ptr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
}
+ if (reloc_base)
+ *reloc_base = mem_reloc;
+
out:
kfree(fw_name);
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 728d421..d09a9c7 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -344,7 +344,7 @@ struct rproc_ops {
int (*stop)(struct rproc *rproc);
void (*kick)(struct rproc *rproc, int vqid);
void * (*da_to_va)(struct rproc *rproc, u64 da, int len);
- int (*load_rsc_table)(struct rproc *rproc, const struct firmware *fw);
+ int (*parse_fw)(struct rproc *rproc, const struct firmware *fw);
struct resource_table *(*find_loaded_rsc_table)(
struct rproc *rproc, const struct firmware *fw);
int (*load)(struct rproc *rproc, const struct firmware *fw);
@@ -395,6 +395,21 @@ enum rproc_crash_type {
};
/**
+ * struct rproc_dump_segment - segment info from ELF header
+ * @node: list node related to the rproc segment list
+ * @da: device address of the segment
+ * @size: size of the segment
+ */
+struct rproc_dump_segment {
+ struct list_head node;
+
+ dma_addr_t da;
+ size_t size;
+
+ loff_t offset;
+};
+
+/**
* struct rproc - represents a physical remote processor device
* @node: list node of this rproc object
* @domain: iommu domain
@@ -424,6 +439,7 @@ enum rproc_crash_type {
* @cached_table: copy of the resource table
* @table_sz: size of @cached_table
* @has_iommu: flag to indicate if remote processor is behind an MMU
+ * @dump_segments: list of segments in the firmware
*/
struct rproc {
struct list_head node;
@@ -455,19 +471,21 @@ struct rproc {
size_t table_sz;
bool has_iommu;
bool auto_boot;
+ struct list_head dump_segments;
};
/**
* struct rproc_subdev - subdevice tied to a remoteproc
* @node: list node related to the rproc subdevs list
* @probe: probe function, called as the rproc is started
- * @remove: remove function, called as the rproc is stopped
+ * @remove: remove function, called as the rproc is being stopped, the @crashed
+ * parameter indicates if this originates from the a recovery
*/
struct rproc_subdev {
struct list_head node;
int (*probe)(struct rproc_subdev *subdev);
- void (*remove)(struct rproc_subdev *subdev);
+ void (*remove)(struct rproc_subdev *subdev, bool crashed);
};
/* we currently support only two vrings per rvdev */
@@ -534,6 +552,7 @@ void rproc_free(struct rproc *rproc);
int rproc_boot(struct rproc *rproc);
void rproc_shutdown(struct rproc *rproc);
void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type);
+int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size);
static inline struct rproc_vdev *vdev_to_rvdev(struct virtio_device *vdev)
{
@@ -550,7 +569,7 @@ static inline struct rproc *vdev_to_rproc(struct virtio_device *vdev)
void rproc_add_subdev(struct rproc *rproc,
struct rproc_subdev *subdev,
int (*probe)(struct rproc_subdev *subdev),
- void (*remove)(struct rproc_subdev *subdev));
+ void (*remove)(struct rproc_subdev *subdev, bool graceful));
void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev);
diff --git a/include/linux/soc/qcom/mdt_loader.h b/include/linux/soc/qcom/mdt_loader.h
index bd8e086..5b98bbd 100644
--- a/include/linux/soc/qcom/mdt_loader.h
+++ b/include/linux/soc/qcom/mdt_loader.h
@@ -14,6 +14,7 @@ struct firmware;
ssize_t qcom_mdt_get_size(const struct firmware *fw);
int qcom_mdt_load(struct device *dev, const struct firmware *fw,
const char *fw_name, int pas_id, void *mem_region,
- phys_addr_t mem_phys, size_t mem_size);
+ phys_addr_t mem_phys, size_t mem_size,
+ phys_addr_t *reloc_base);
#endif
diff --git a/samples/Kconfig b/samples/Kconfig
index f524f55..3db002b 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -62,6 +62,16 @@ config SAMPLE_KDB
Build an example of how to dynamically add the hello
command to the kdb shell.
+config SAMPLE_QMI_CLIENT
+ tristate "Build qmi client sample -- loadable modules only"
+ depends on m
+ depends on ARCH_QCOM
+ depends on NET
+ select QCOM_QMI_HELPERS
+ help
+ Build an QMI client sample driver, which demonstrates how to
+ communicate with a remote QRTR service, using QMI encoded messages.
+
config SAMPLE_RPMSG_CLIENT
tristate "Build rpmsg client sample -- loadable modules only"
depends on RPMSG && m
diff --git a/samples/Makefile b/samples/Makefile
index 70cf375..bd601c0 100644
--- a/samples/Makefile
+++ b/samples/Makefile
@@ -3,4 +3,4 @@
obj-$(CONFIG_SAMPLES) += kobject/ kprobes/ trace_events/ livepatch/ \
hw_breakpoint/ kfifo/ kdb/ hidraw/ rpmsg/ seccomp/ \
configfs/ connector/ v4l/ trace_printk/ \
- vfio-mdev/ statx/
+ vfio-mdev/ statx/ qmi/
diff --git a/samples/qmi/Makefile b/samples/qmi/Makefile
new file mode 100644
index 0000000..2b111d2
--- /dev/null
+++ b/samples/qmi/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_SAMPLE_QMI_CLIENT) += qmi_sample_client.o
diff --git a/samples/qmi/qmi_sample_client.c b/samples/qmi/qmi_sample_client.c
new file mode 100644
index 0000000..c9e7276
--- /dev/null
+++ b/samples/qmi/qmi_sample_client.c
@@ -0,0 +1,622 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sample in-kernel QMI client driver
+ *
+ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2017 Linaro Ltd.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/qrtr.h>
+#include <linux/net.h>
+#include <linux/completion.h>
+#include <linux/idr.h>
+#include <linux/string.h>
+#include <net/sock.h>
+#include <linux/soc/qcom/qmi.h>
+
+#define PING_REQ1_TLV_TYPE 0x1
+#define PING_RESP1_TLV_TYPE 0x2
+#define PING_OPT1_TLV_TYPE 0x10
+#define PING_OPT2_TLV_TYPE 0x11
+
+#define DATA_REQ1_TLV_TYPE 0x1
+#define DATA_RESP1_TLV_TYPE 0x2
+#define DATA_OPT1_TLV_TYPE 0x10
+#define DATA_OPT2_TLV_TYPE 0x11
+
+#define TEST_MED_DATA_SIZE_V01 8192
+#define TEST_MAX_NAME_SIZE_V01 255
+
+#define TEST_PING_REQ_MSG_ID_V01 0x20
+#define TEST_DATA_REQ_MSG_ID_V01 0x21
+
+#define TEST_PING_REQ_MAX_MSG_LEN_V01 266
+#define TEST_DATA_REQ_MAX_MSG_LEN_V01 8456
+
+struct test_name_type_v01 {
+ u32 name_len;
+ char name[TEST_MAX_NAME_SIZE_V01];
+};
+
+static struct qmi_elem_info test_name_type_v01_ei[] = {
+ {
+ .data_type = QMI_DATA_LEN,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = QMI_COMMON_TLV_TYPE,
+ .offset = offsetof(struct test_name_type_v01,
+ name_len),
+ },
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = TEST_MAX_NAME_SIZE_V01,
+ .elem_size = sizeof(char),
+ .array_type = VAR_LEN_ARRAY,
+ .tlv_type = QMI_COMMON_TLV_TYPE,
+ .offset = offsetof(struct test_name_type_v01,
+ name),
+ },
+ {}
+};
+
+struct test_ping_req_msg_v01 {
+ char ping[4];
+
+ u8 client_name_valid;
+ struct test_name_type_v01 client_name;
+};
+
+static struct qmi_elem_info test_ping_req_msg_v01_ei[] = {
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = 4,
+ .elem_size = sizeof(char),
+ .array_type = STATIC_ARRAY,
+ .tlv_type = PING_REQ1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_req_msg_v01,
+ ping),
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_req_msg_v01,
+ client_name_valid),
+ },
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct test_name_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_req_msg_v01,
+ client_name),
+ .ei_array = test_name_type_v01_ei,
+ },
+ {}
+};
+
+struct test_ping_resp_msg_v01 {
+ struct qmi_response_type_v01 resp;
+
+ u8 pong_valid;
+ char pong[4];
+
+ u8 service_name_valid;
+ struct test_name_type_v01 service_name;
+};
+
+static struct qmi_elem_info test_ping_resp_msg_v01_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_RESP1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_resp_msg_v01,
+ resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_resp_msg_v01,
+ pong_valid),
+ },
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = 4,
+ .elem_size = sizeof(char),
+ .array_type = STATIC_ARRAY,
+ .tlv_type = PING_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_ping_resp_msg_v01,
+ pong),
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_OPT2_TLV_TYPE,
+ .offset = offsetof(struct test_ping_resp_msg_v01,
+ service_name_valid),
+ },
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct test_name_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = PING_OPT2_TLV_TYPE,
+ .offset = offsetof(struct test_ping_resp_msg_v01,
+ service_name),
+ .ei_array = test_name_type_v01_ei,
+ },
+ {}
+};
+
+struct test_data_req_msg_v01 {
+ u32 data_len;
+ u8 data[TEST_MED_DATA_SIZE_V01];
+
+ u8 client_name_valid;
+ struct test_name_type_v01 client_name;
+};
+
+static struct qmi_elem_info test_data_req_msg_v01_ei[] = {
+ {
+ .data_type = QMI_DATA_LEN,
+ .elem_len = 1,
+ .elem_size = sizeof(u32),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_REQ1_TLV_TYPE,
+ .offset = offsetof(struct test_data_req_msg_v01,
+ data_len),
+ },
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = TEST_MED_DATA_SIZE_V01,
+ .elem_size = sizeof(u8),
+ .array_type = VAR_LEN_ARRAY,
+ .tlv_type = DATA_REQ1_TLV_TYPE,
+ .offset = offsetof(struct test_data_req_msg_v01,
+ data),
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_data_req_msg_v01,
+ client_name_valid),
+ },
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct test_name_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_data_req_msg_v01,
+ client_name),
+ .ei_array = test_name_type_v01_ei,
+ },
+ {}
+};
+
+struct test_data_resp_msg_v01 {
+ struct qmi_response_type_v01 resp;
+
+ u8 data_valid;
+ u32 data_len;
+ u8 data[TEST_MED_DATA_SIZE_V01];
+
+ u8 service_name_valid;
+ struct test_name_type_v01 service_name;
+};
+
+static struct qmi_elem_info test_data_resp_msg_v01_ei[] = {
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct qmi_response_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_RESP1_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ resp),
+ .ei_array = qmi_response_type_v01_ei,
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ data_valid),
+ },
+ {
+ .data_type = QMI_DATA_LEN,
+ .elem_len = 1,
+ .elem_size = sizeof(u32),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ data_len),
+ },
+ {
+ .data_type = QMI_UNSIGNED_1_BYTE,
+ .elem_len = TEST_MED_DATA_SIZE_V01,
+ .elem_size = sizeof(u8),
+ .array_type = VAR_LEN_ARRAY,
+ .tlv_type = DATA_OPT1_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ data),
+ },
+ {
+ .data_type = QMI_OPT_FLAG,
+ .elem_len = 1,
+ .elem_size = sizeof(u8),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT2_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ service_name_valid),
+ },
+ {
+ .data_type = QMI_STRUCT,
+ .elem_len = 1,
+ .elem_size = sizeof(struct test_name_type_v01),
+ .array_type = NO_ARRAY,
+ .tlv_type = DATA_OPT2_TLV_TYPE,
+ .offset = offsetof(struct test_data_resp_msg_v01,
+ service_name),
+ .ei_array = test_name_type_v01_ei,
+ },
+ {}
+};
+
+/*
+ * ping_write() - ping_pong debugfs file write handler
+ * @file: debugfs file context
+ * @user_buf: reference to the user data (ignored)
+ * @count: number of bytes in @user_buf
+ * @ppos: offset in @file to write
+ *
+ * This function allows user space to send out a ping_pong QMI encoded message
+ * to the associated remote test service and will return with the result of the
+ * transaction. It serves as an example of how to provide a custom response
+ * handler.
+ *
+ * Return: @count, or negative errno on failure.
+ */
+static ssize_t ping_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct qmi_handle *qmi = file->private_data;
+ struct test_ping_req_msg_v01 req = {};
+ struct qmi_txn txn;
+ int ret;
+
+ memcpy(req.ping, "ping", sizeof(req.ping));
+
+ ret = qmi_txn_init(qmi, &txn, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = qmi_send_request(qmi, NULL, &txn,
+ TEST_PING_REQ_MSG_ID_V01,
+ TEST_PING_REQ_MAX_MSG_LEN_V01,
+ test_ping_req_msg_v01_ei, &req);
+ if (ret < 0) {
+ qmi_txn_cancel(&txn);
+ return ret;
+ }
+
+ ret = qmi_txn_wait(&txn, 5 * HZ);
+ if (ret < 0)
+ count = ret;
+
+ return count;
+}
+
+static const struct file_operations ping_fops = {
+ .open = simple_open,
+ .write = ping_write,
+};
+
+static void ping_pong_cb(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+ struct qmi_txn *txn, const void *data)
+{
+ const struct test_ping_resp_msg_v01 *resp = data;
+
+ if (!txn) {
+ pr_err("spurious ping response\n");
+ return;
+ }
+
+ if (resp->resp.result == QMI_RESULT_FAILURE_V01)
+ txn->result = -ENXIO;
+ else if (!resp->pong_valid || memcmp(resp->pong, "pong", 4))
+ txn->result = -EINVAL;
+
+ complete(&txn->completion);
+}
+
+/*
+ * data_write() - data debugfs file write handler
+ * @file: debugfs file context
+ * @user_buf: reference to the user data
+ * @count: number of bytes in @user_buf
+ * @ppos: offset in @file to write
+ *
+ * This function allows user space to send out a data QMI encoded message to
+ * the associated remote test service and will return with the result of the
+ * transaction. It serves as an example of how to have the QMI helpers decode a
+ * transaction response into a provided object automatically.
+ *
+ * Return: @count, or negative errno on failure.
+ */
+static ssize_t data_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+
+{
+ struct qmi_handle *qmi = file->private_data;
+ struct test_data_resp_msg_v01 *resp;
+ struct test_data_req_msg_v01 *req;
+ struct qmi_txn txn;
+ int ret;
+
+ req = kzalloc(sizeof(*req), GFP_KERNEL);
+ if (!req)
+ return -ENOMEM;
+
+ resp = kzalloc(sizeof(*resp), GFP_KERNEL);
+ if (!resp) {
+ kfree(req);
+ return -ENOMEM;
+ }
+
+ req->data_len = min_t(size_t, sizeof(req->data), count);
+ if (copy_from_user(req->data, user_buf, req->data_len)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ ret = qmi_txn_init(qmi, &txn, test_data_resp_msg_v01_ei, resp);
+ if (ret < 0)
+ goto out;
+
+ ret = qmi_send_request(qmi, NULL, &txn,
+ TEST_DATA_REQ_MSG_ID_V01,
+ TEST_DATA_REQ_MAX_MSG_LEN_V01,
+ test_data_req_msg_v01_ei, req);
+ if (ret < 0) {
+ qmi_txn_cancel(&txn);
+ goto out;
+ }
+
+ ret = qmi_txn_wait(&txn, 5 * HZ);
+ if (ret < 0) {
+ goto out;
+ } else if (!resp->data_valid ||
+ resp->data_len != req->data_len ||
+ memcmp(resp->data, req->data, req->data_len)) {
+ pr_err("response data doesn't match expectation\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = count;
+
+out:
+ kfree(resp);
+ kfree(req);
+
+ return ret;
+}
+
+static const struct file_operations data_fops = {
+ .open = simple_open,
+ .write = data_write,
+};
+
+static struct qmi_msg_handler qmi_sample_handlers[] = {
+ {
+ .type = QMI_RESPONSE,
+ .msg_id = TEST_PING_REQ_MSG_ID_V01,
+ .ei = test_ping_resp_msg_v01_ei,
+ .decoded_size = sizeof(struct test_ping_req_msg_v01),
+ .fn = ping_pong_cb
+ },
+ {}
+};
+
+struct qmi_sample {
+ struct qmi_handle qmi;
+
+ struct dentry *de_dir;
+ struct dentry *de_data;
+ struct dentry *de_ping;
+};
+
+static struct dentry *qmi_debug_dir;
+
+static int qmi_sample_probe(struct platform_device *pdev)
+{
+ struct sockaddr_qrtr *sq;
+ struct qmi_sample *sample;
+ char path[20];
+ int ret;
+
+ sample = devm_kzalloc(&pdev->dev, sizeof(*sample), GFP_KERNEL);
+ if (!sample)
+ return -ENOMEM;
+
+ ret = qmi_handle_init(&sample->qmi, TEST_DATA_REQ_MAX_MSG_LEN_V01,
+ NULL,
+ qmi_sample_handlers);
+ if (ret < 0)
+ return ret;
+
+ sq = dev_get_platdata(&pdev->dev);
+ ret = kernel_connect(sample->qmi.sock, (struct sockaddr *)sq,
+ sizeof(*sq), 0);
+ if (ret < 0) {
+ pr_err("failed to connect to remote service port\n");
+ goto err_release_qmi_handle;
+ }
+
+ snprintf(path, sizeof(path), "%d:%d", sq->sq_node, sq->sq_port);
+
+ sample->de_dir = debugfs_create_dir(path, qmi_debug_dir);
+ if (IS_ERR(sample->de_dir)) {
+ ret = PTR_ERR(sample->de_dir);
+ goto err_release_qmi_handle;
+ }
+
+ sample->de_data = debugfs_create_file("data", 0600, sample->de_dir,
+ sample, &data_fops);
+ if (IS_ERR(sample->de_data)) {
+ ret = PTR_ERR(sample->de_data);
+ goto err_remove_de_dir;
+ }
+
+ sample->de_ping = debugfs_create_file("ping", 0600, sample->de_dir,
+ sample, &ping_fops);
+ if (IS_ERR(sample->de_ping)) {
+ ret = PTR_ERR(sample->de_ping);
+ goto err_remove_de_data;
+ }
+
+ platform_set_drvdata(pdev, sample);
+
+ return 0;
+
+err_remove_de_data:
+ debugfs_remove(sample->de_data);
+err_remove_de_dir:
+ debugfs_remove(sample->de_dir);
+err_release_qmi_handle:
+ qmi_handle_release(&sample->qmi);
+
+ return ret;
+}
+
+static int qmi_sample_remove(struct platform_device *pdev)
+{
+ struct qmi_sample *sample = platform_get_drvdata(pdev);
+
+ debugfs_remove(sample->de_ping);
+ debugfs_remove(sample->de_data);
+ debugfs_remove(sample->de_dir);
+
+ qmi_handle_release(&sample->qmi);
+
+ return 0;
+}
+
+static struct platform_driver qmi_sample_driver = {
+ .probe = qmi_sample_probe,
+ .remove = qmi_sample_remove,
+ .driver = {
+ .name = "qmi_sample_client",
+ },
+};
+
+static int qmi_sample_new_server(struct qmi_handle *qmi,
+ struct qmi_service *service)
+{
+ struct platform_device *pdev;
+ struct sockaddr_qrtr sq = { AF_QIPCRTR, service->node, service->port };
+ int ret;
+
+ pdev = platform_device_alloc("qmi_sample_client", PLATFORM_DEVID_AUTO);
+ if (!pdev)
+ return -ENOMEM;
+
+ ret = platform_device_add_data(pdev, &sq, sizeof(sq));
+ if (ret)
+ goto err_put_device;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto err_put_device;
+
+ service->priv = pdev;
+
+ return 0;
+
+err_put_device:
+ platform_device_put(pdev);
+
+ return ret;
+}
+
+static void qmi_sample_del_server(struct qmi_handle *qmi,
+ struct qmi_service *service)
+{
+ struct platform_device *pdev = service->priv;
+
+ platform_device_unregister(pdev);
+}
+
+static struct qmi_handle lookup_client;
+
+static struct qmi_ops lookup_ops = {
+ .new_server = qmi_sample_new_server,
+ .del_server = qmi_sample_del_server,
+};
+
+static int qmi_sample_init(void)
+{
+ int ret;
+
+ qmi_debug_dir = debugfs_create_dir("qmi_sample", NULL);
+ if (IS_ERR(qmi_debug_dir)) {
+ pr_err("failed to create qmi_sample dir\n");
+ return PTR_ERR(qmi_debug_dir);
+ }
+
+ ret = platform_driver_register(&qmi_sample_driver);
+ if (ret)
+ goto err_remove_debug_dir;
+
+ ret = qmi_handle_init(&lookup_client, 0, &lookup_ops, NULL);
+ if (ret < 0)
+ goto err_unregister_driver;
+
+ qmi_add_lookup(&lookup_client, 15, 0, 0);
+
+ return 0;
+
+err_unregister_driver:
+ platform_driver_unregister(&qmi_sample_driver);
+err_remove_debug_dir:
+ debugfs_remove(qmi_debug_dir);
+
+ return ret;
+}
+
+static void qmi_sample_exit(void)
+{
+ qmi_handle_release(&lookup_client);
+
+ platform_driver_unregister(&qmi_sample_driver);
+
+ debugfs_remove(qmi_debug_dir);
+}
+
+module_init(qmi_sample_init);
+module_exit(qmi_sample_exit);
+
+MODULE_DESCRIPTION("Sample QMI client driver");
+MODULE_LICENSE("GPL v2");