diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0133-bus-fsl-mc-add-bus-rescan-attribute.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0133-bus-fsl-mc-add-bus-rescan-attribute.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0133-bus-fsl-mc-add-bus-rescan-attribute.patch b/target/linux/layerscape/patches-5.4/701-net-0133-bus-fsl-mc-add-bus-rescan-attribute.patch new file mode 100644 index 0000000000..ea22ddb3fc --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0133-bus-fsl-mc-add-bus-rescan-attribute.patch @@ -0,0 +1,115 @@ +From 4eba1e0209a52798e1b6a233840a28fc5132cd9c Mon Sep 17 00:00:00 2001 +From: Ioana Ciornei <ioana.ciornei@nxp.com> +Date: Mon, 5 Mar 2018 18:38:46 +0200 +Subject: [PATCH] bus: fsl-mc: add bus rescan attribute + +Introduce the rescan attribute as a bus attribute to +synchronize the fsl-mc bus objects and the MC firmware. + +To rescan the fsl-mc bus, e.g., +echo 1 > /sys/bus/fsl-mc/rescan + +Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> +--- + Documentation/ABI/stable/sysfs-bus-fsl-mc | 10 ++++++++ + drivers/bus/fsl-mc/dprc-driver.c | 4 +-- + drivers/bus/fsl-mc/fsl-mc-bus.c | 41 +++++++++++++++++++++++++++++++ + drivers/bus/fsl-mc/fsl-mc-private.h | 2 ++ + 4 files changed, 55 insertions(+), 2 deletions(-) + +--- a/Documentation/ABI/stable/sysfs-bus-fsl-mc ++++ b/Documentation/ABI/stable/sysfs-bus-fsl-mc +@@ -7,3 +7,13 @@ Description: Writing a non-zero value to + synchronize the objects under dprc.X and the + Management Complex firmware. + Users: Userspace drivers and management tools ++ ++What: /sys/bus/fsl-mc/rescan ++Date: November 2018 ++KernelVersion: 5.0 ++Contact: Ioana Ciornei <ioana.ciornei@nxp.com> ++Description: Writing a non-zero value to this attribute will ++ force a rescan of fsl-mc bus in the system and ++ synchronize the objects under fsl-mc bus and the ++ Management Complex firmware. ++Users: Userspace drivers and management tools +--- a/drivers/bus/fsl-mc/dprc-driver.c ++++ b/drivers/bus/fsl-mc/dprc-driver.c +@@ -214,8 +214,8 @@ static void dprc_add_new_devices(struct + * populated before they can get allocation requests from probe callbacks + * of the device drivers for the non-allocatable devices. + */ +-static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, +- unsigned int *total_irq_count) ++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; +--- a/drivers/bus/fsl-mc/fsl-mc-bus.c ++++ b/drivers/bus/fsl-mc/fsl-mc-bus.c +@@ -154,12 +154,53 @@ static struct attribute *fsl_mc_dev_attr + + ATTRIBUTE_GROUPS(fsl_mc_dev); + ++static int scan_fsl_mc_bus(struct device *dev, void *data) ++{ ++ struct fsl_mc_device *root_mc_dev; ++ struct fsl_mc_bus *root_mc_bus; ++ ++ if (!fsl_mc_is_root_dprc(dev)) ++ goto exit; ++ ++ root_mc_dev = to_fsl_mc_device(dev); ++ root_mc_bus = to_fsl_mc_bus(root_mc_dev); ++ mutex_lock(&root_mc_bus->scan_mutex); ++ dprc_scan_objects(root_mc_dev, NULL); ++ mutex_unlock(&root_mc_bus->scan_mutex); ++ ++exit: ++ return 0; ++} ++ ++static ssize_t rescan_store(struct bus_type *bus, ++ const char *buf, size_t count) ++{ ++ unsigned long val; ++ ++ if (kstrtoul(buf, 0, &val) < 0) ++ return -EINVAL; ++ ++ if (val) ++ bus_for_each_dev(bus, NULL, NULL, scan_fsl_mc_bus); ++ ++ return count; ++} ++static BUS_ATTR_WO(rescan); ++ ++static struct attribute *fsl_mc_bus_attrs[] = { ++ &bus_attr_rescan.attr, ++ NULL, ++}; ++ ++ATTRIBUTE_GROUPS(fsl_mc_bus); ++ + struct bus_type fsl_mc_bus_type = { + .name = "fsl-mc", + .match = fsl_mc_bus_match, + .uevent = fsl_mc_bus_uevent, + .dma_configure = fsl_mc_dma_configure, + .dev_groups = fsl_mc_dev_groups, ++ .bus_groups = fsl_mc_bus_groups, + }; + EXPORT_SYMBOL_GPL(fsl_mc_bus_type); + +--- a/drivers/bus/fsl-mc/fsl-mc-private.h ++++ b/drivers/bus/fsl-mc/fsl-mc-private.h +@@ -556,6 +556,8 @@ int __init dprc_driver_init(void); + + void dprc_driver_exit(void); + ++int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, ++ unsigned int *total_irq_count); + int __init fsl_mc_allocator_driver_init(void); + + void fsl_mc_allocator_driver_exit(void); |