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bus/fsl-mc: Add a container setup function

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Both DPRC driver and VFIO driver use the same initialization code
for the DPRC. Introduced a new function which groups this
initialization code. The function is exported and may be
used by VFIO as well.

Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
Link: https://lore.kernel.org/r/20200929085441.17448-10-diana.craciun@oss.nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Diana Craciun 2020-09-29 11:54:37 +03:00 committed by Greg Kroah-Hartman
parent 46f35b5fbb
commit 17eaf21320
2 changed files with 52 additions and 23 deletions
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73
drivers/bus/fsl-mc/dprc-driver.c
View file

@ -588,25 +588,24 @@ static int dprc_setup_irq(struct fsl_mc_device *mc_dev)
}
/**
* dprc_probe - callback invoked when a DPRC is being bound to this driver
* dprc_setup - opens and creates a mc_io for DPRC
*
* @mc_dev: Pointer to fsl-mc device representing a DPRC
*
* It opens the physical DPRC in the MC.
* It scans the DPRC to discover the MC objects contained in it.
* It creates the interrupt pool for the MC bus associated with the DPRC.
* It configures the interrupts for the DPRC device itself.
* It configures the DPRC portal used to communicate with MC
*/
static int dprc_probe(struct fsl_mc_device *mc_dev)
int dprc_setup(struct fsl_mc_device *mc_dev)
{
int error;
size_t region_size;
struct device *parent_dev = mc_dev->dev.parent;
struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
struct irq_domain *mc_msi_domain;
bool mc_io_created = false;
bool msi_domain_set = false;
u16 major_ver, minor_ver;
struct irq_domain *mc_msi_domain;
size_t region_size;
int error;
if (!is_fsl_mc_bus_dprc(mc_dev))
return -EINVAL;
@ -681,21 +680,6 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
goto error_cleanup_open;
}
/*
* Discover MC objects in DPRC object:
*/
error = dprc_scan_container(mc_dev, true);
if (error < 0)
goto error_cleanup_open;
/*
* Configure interrupt for the DPRC object associated with this MC bus:
*/
error = dprc_setup_irq(mc_dev);
if (error < 0)
goto error_cleanup_open;
dev_info(&mc_dev->dev, "DPRC device bound to driver");
return 0;
error_cleanup_open:
@ -712,6 +696,49 @@ static int dprc_probe(struct fsl_mc_device *mc_dev)
return error;
}
EXPORT_SYMBOL_GPL(dprc_setup);
/**
* dprc_probe - callback invoked when a DPRC is being bound to this driver
*
* @mc_dev: Pointer to fsl-mc device representing a DPRC
*
* It opens the physical DPRC in the MC.
* It scans the DPRC to discover the MC objects contained in it.
* It creates the interrupt pool for the MC bus associated with the DPRC.
* It configures the interrupts for the DPRC device itself.
*/
static int dprc_probe(struct fsl_mc_device *mc_dev)
{
int error;
error = dprc_setup(mc_dev);
if (error < 0)
return error;
/*
* Discover MC objects in DPRC object:
*/
error = dprc_scan_container(mc_dev, true);
if (error < 0)
goto dprc_cleanup;
/*
* Configure interrupt for the DPRC object associated with this MC bus:
*/
error = dprc_setup_irq(mc_dev);
if (error < 0)
goto scan_cleanup;
dev_info(&mc_dev->dev, "DPRC device bound to driver");
return 0;
scan_cleanup:
device_for_each_child(&mc_dev->dev, NULL, __fsl_mc_device_remove);
dprc_cleanup:
dprc_cleanup(mc_dev);
return error;
}
/*
* Tear down interrupt for a given DPRC object

2
include/linux/fsl/mc.h
View file

@ -540,6 +540,8 @@ void dprc_remove_devices(struct fsl_mc_device *mc_bus_dev,
int dprc_cleanup(struct fsl_mc_device *mc_dev);
int dprc_setup(struct fsl_mc_device *mc_dev);
/*
* Data Path Buffer Pool (DPBP) API
* Contains initialization APIs and runtime control APIs for DPBP