diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/7149-staging-fsl-mc-Populate-the-IRQ-pool-for-an-MC-bus-i.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/7149-staging-fsl-mc-Populate-the-IRQ-pool-for-an-MC-bus-i.patch | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/7149-staging-fsl-mc-Populate-the-IRQ-pool-for-an-MC-bus-i.patch b/target/linux/layerscape/patches-4.4/7149-staging-fsl-mc-Populate-the-IRQ-pool-for-an-MC-bus-i.patch new file mode 100644 index 0000000000..e72d5a7ef7 --- /dev/null +++ b/target/linux/layerscape/patches-4.4/7149-staging-fsl-mc-Populate-the-IRQ-pool-for-an-MC-bus-i.patch @@ -0,0 +1,109 @@ +From 78ab7589777526022757e9c95b9d5864786eb4e5 Mon Sep 17 00:00:00 2001 +From: "J. German Rivera" <German.Rivera@freescale.com> +Date: Wed, 6 Jan 2016 16:03:25 -0600 +Subject: [PATCH 149/226] staging: fsl-mc: Populate the IRQ pool for an MC bus + instance + +Scan the corresponding DPRC container to get total count +of IRQs needed by all its child DPAA2 objects. Then, +preallocate a set of MSI IRQs with the DPRC's ICID +(GIT-ITS device Id) to populate the the DPRC's IRQ pool. +Each child DPAA2 object in the DPRC and the DPRC object itself +will allocate their necessary MSI IRQs from the DPRC's IRQ pool, +in their driver probe function. + +Signed-off-by: J. German Rivera <German.Rivera@freescale.com> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/staging/fsl-mc/bus/dprc-driver.c | 24 ++++++++++++++++++++++-- + drivers/staging/fsl-mc/include/mc-private.h | 3 ++- + 2 files changed, 24 insertions(+), 3 deletions(-) + +--- a/drivers/staging/fsl-mc/bus/dprc-driver.c ++++ b/drivers/staging/fsl-mc/bus/dprc-driver.c +@@ -241,6 +241,7 @@ static void dprc_cleanup_all_resource_po + * dprc_scan_objects - Discover objects in a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object ++ * @total_irq_count: total number of IRQs needed by objects in the DPRC. + * + * Detects objects added and removed from a DPRC and synchronizes the + * state of the Linux bus driver, MC by adding and removing +@@ -254,11 +255,13 @@ static void dprc_cleanup_all_resource_po + * populated before they can get allocation requests from probe callbacks + * of the device drivers for the non-allocatable devices. + */ +-int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev) ++int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, ++ unsigned int *total_irq_count) + { + int num_child_objects; + int dprc_get_obj_failures; + int error; ++ unsigned int irq_count = mc_bus_dev->obj_desc.irq_count; + struct dprc_obj_desc *child_obj_desc_array = NULL; + + error = dprc_get_obj_count(mc_bus_dev->mc_io, +@@ -307,6 +310,7 @@ int dprc_scan_objects(struct fsl_mc_devi + continue; + } + ++ irq_count += obj_desc->irq_count; + dev_dbg(&mc_bus_dev->dev, + "Discovered object: type %s, id %d\n", + obj_desc->type, obj_desc->id); +@@ -319,6 +323,7 @@ int dprc_scan_objects(struct fsl_mc_devi + } + } + ++ *total_irq_count = irq_count; + dprc_remove_devices(mc_bus_dev, child_obj_desc_array, + num_child_objects); + +@@ -344,6 +349,7 @@ EXPORT_SYMBOL_GPL(dprc_scan_objects); + int dprc_scan_container(struct fsl_mc_device *mc_bus_dev) + { + int error; ++ unsigned int irq_count; + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev); + + dprc_init_all_resource_pools(mc_bus_dev); +@@ -352,11 +358,25 @@ int dprc_scan_container(struct fsl_mc_de + * Discover objects in the DPRC: + */ + mutex_lock(&mc_bus->scan_mutex); +- error = dprc_scan_objects(mc_bus_dev); ++ error = dprc_scan_objects(mc_bus_dev, &irq_count); + mutex_unlock(&mc_bus->scan_mutex); + if (error < 0) + goto error; + ++ if (dev_get_msi_domain(&mc_bus_dev->dev) && !mc_bus->irq_resources) { ++ if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) { ++ dev_warn(&mc_bus_dev->dev, ++ "IRQs needed (%u) exceed IRQs preallocated (%u)\n", ++ irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS); ++ } ++ ++ error = fsl_mc_populate_irq_pool( ++ mc_bus, ++ FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS); ++ if (error < 0) ++ goto error; ++ } ++ + return 0; + error: + dprc_cleanup_all_resource_pools(mc_bus_dev); +--- a/drivers/staging/fsl-mc/include/mc-private.h ++++ b/drivers/staging/fsl-mc/include/mc-private.h +@@ -114,7 +114,8 @@ void fsl_mc_device_remove(struct fsl_mc_ + + int dprc_scan_container(struct fsl_mc_device *mc_bus_dev); + +-int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev); ++int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, ++ unsigned int *total_irq_count); + + int __init dprc_driver_init(void); + |