[PATCH 2/3] cxl: Introduce module parameter 'enable_psltrace'
From: Vaibhav Jain <hidden>
Date: 2018-02-09 04:26:45
Subsystem:
char and misc drivers, the rest · Maintainers:
Arnd Bergmann, Greg Kroah-Hartman, Linus Torvalds
We introduce a new module parameter named 'enable_psltrace' which asks cxl to start(by default) psl-traces on an adapter as soon as its probe is finished. In case this default behavior is not needed then this module parameter can be set to '0'. Signed-off-by: Vaibhav Jain <redacted> --- drivers/misc/cxl/cxl.h | 2 ++ drivers/misc/cxl/main.c | 4 ++++ drivers/misc/cxl/pci.c | 3 +++ 3 files changed, 9 insertions(+)
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h
index 81da307b60c0..1af66451cbb4 100644
--- a/drivers/misc/cxl/cxl.h
+++ b/drivers/misc/cxl/cxl.h@@ -28,6 +28,7 @@ #include <uapi/misc/cxl.h> extern uint cxl_verbose; +extern bool cxl_enable_psltrace; #define CXL_TIMEOUT 5
@@ -678,6 +679,7 @@ struct cxl_service_layer_ops { void (*psl_irq_dump_registers)(struct cxl_context *ctx); void (*err_irq_dump_registers)(struct cxl *adapter); void (*stop_psltrace)(struct cxl *adapter); + void (*start_psltrace)(struct cxl *adapter); void (*write_timebase_ctrl)(struct cxl *adapter); u64 (*timebase_read)(struct cxl *adapter); int capi_mode;
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index c1ba0d42cbc8..593f2cdba3d8 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c@@ -34,6 +34,10 @@ uint cxl_verbose; module_param_named(verbose, cxl_verbose, uint, 0600); MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); +bool cxl_enable_psltrace = true; +module_param_named(enable_psltrace, cxl_enable_psltrace, bool, 0600); +MODULE_PARM_DESC(enable_psltrace, "Set PSL traces on probe. default: on"); + const struct cxl_backend_ops *cxl_ops; int cxl_afu_slbia(struct cxl_afu *afu)
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 926b13973b73..9e8b8525534c 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c@@ -1726,6 +1726,9 @@ static int cxl_configure_adapter(struct cxl *adapter, struct pci_dev *dev) if ((rc = cxl_native_register_psl_err_irq(adapter))) goto err; + if (cxl_enable_psltrace && adapter->native->sl_ops->start_psltrace) + adapter->native->sl_ops->start_psltrace(adapter); + return 0; err:
--
2.14.3