--- /dev/null
+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);
+
projects / openwrt / staging / lynxis.git / blobdiff