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bus/fsl-mc: Export IRQ pool handling functions to be used by VFIO 

The IRQ pool handling functions can be used by both DPRC
driver and VFIO. Adapt and export those functions.

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/20200929085441.17448-12-diana.craciun@oss.nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Diana Craciun 2020-09-29 11:54:39 +03:00 committed by Greg Kroah-Hartman
parent 5026cf6051
commit 0dadd95216
4 changed files with 22 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/bus/fsl-mc/dprc-driver.c
View File

@ -327,8 +327,8 @@ static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
}
if (alloc_interrupts && !mc_bus->irq_resources) {
error = fsl_mc_populate_irq_pool(mc_bus,
FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
error = fsl_mc_populate_irq_pool(mc_bus_dev,
FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
if (error < 0)
return error;
}
@ -766,8 +766,6 @@ static void dprc_teardown_irq(struct fsl_mc_device *mc_dev)
int dprc_cleanup(struct fsl_mc_device *mc_dev)
{
int error;
struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
/* this function should be called only for DPRCs, it
* is an error to call it for regular objects
@ -776,7 +774,7 @@ int dprc_cleanup(struct fsl_mc_device *mc_dev)
return -EINVAL;
if (dev_get_msi_domain(&mc_dev->dev)) {
fsl_mc_cleanup_irq_pool(mc_bus);
fsl_mc_cleanup_irq_pool(mc_dev);
dev_set_msi_domain(&mc_dev->dev, NULL);
}

12
drivers/bus/fsl-mc/fsl-mc-allocator.c
View File

@ -344,7 +344,7 @@ EXPORT_SYMBOL_GPL(fsl_mc_object_free);
* Initialize the interrupt pool associated with an fsl-mc bus.
* It allocates a block of IRQs from the GIC-ITS.
*/
int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
int fsl_mc_populate_irq_pool(struct fsl_mc_device *mc_bus_dev,
unsigned int irq_count)
{
unsigned int i;
@ -352,10 +352,14 @@ int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
struct fsl_mc_device_irq *irq_resources;
struct fsl_mc_device_irq *mc_dev_irq;
int error;
struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
struct fsl_mc_resource_pool *res_pool =
&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
/* do nothing if the IRQ pool is already populated */
if (mc_bus->irq_resources)
return 0;
if (irq_count == 0 ||
irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS)
return -EINVAL;
@ -407,9 +411,9 @@ EXPORT_SYMBOL_GPL(fsl_mc_populate_irq_pool);
* Teardown the interrupt pool associated with an fsl-mc bus.
* It frees the IRQs that were allocated to the pool, back to the GIC-ITS.
*/
void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus)
void fsl_mc_cleanup_irq_pool(struct fsl_mc_device *mc_bus_dev)
{
struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
struct fsl_mc_resource_pool *res_pool =
&mc_bus->resource_pools[FSL_MC_POOL_IRQ];

10
drivers/bus/fsl-mc/fsl-mc-private.h
View File

@ -519,11 +519,6 @@ struct dpcon_cmd_set_notification {
__le64 user_ctx;
};
/**
* Maximum number of total IRQs that can be pre-allocated for an MC bus'
* IRQ pool
*/
#define FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS 256
/**
* struct fsl_mc_resource_pool - Pool of MC resources of a given
@ -598,11 +593,6 @@ void fsl_mc_msi_domain_free_irqs(struct device *dev);
struct irq_domain *fsl_mc_find_msi_domain(struct device *dev);
int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
unsigned int irq_count);
void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus);
int __must_check fsl_create_mc_io(struct device *dev,
phys_addr_t mc_portal_phys_addr,
u32 mc_portal_size,

11
include/linux/fsl/mc.h
View File

@ -542,6 +542,17 @@ int dprc_cleanup(struct fsl_mc_device *mc_dev);
int dprc_setup(struct fsl_mc_device *mc_dev);
/**
* Maximum number of total IRQs that can be pre-allocated for an MC bus'
* IRQ pool
*/
#define FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS 256
int fsl_mc_populate_irq_pool(struct fsl_mc_device *mc_bus_dev,
unsigned int irq_count);
void fsl_mc_cleanup_irq_pool(struct fsl_mc_device *mc_bus_dev);
/*
* Data Path Buffer Pool (DPBP) API
* Contains initialization APIs and runtime control APIs for DPBP