diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0135-bus-fsl-mc-Propagate-driver_override-for-a-child-DPR.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0135-bus-fsl-mc-Propagate-driver_override-for-a-child-DPR.patch | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0135-bus-fsl-mc-Propagate-driver_override-for-a-child-DPR.patch b/target/linux/layerscape/patches-5.4/701-net-0135-bus-fsl-mc-Propagate-driver_override-for-a-child-DPR.patch new file mode 100644 index 0000000000..b750c72664 --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0135-bus-fsl-mc-Propagate-driver_override-for-a-child-DPR.patch @@ -0,0 +1,196 @@ +From ab5ad879bf30318213a717ab50944b5590bc09c1 Mon Sep 17 00:00:00 2001 +From: Laurentiu Tudor <laurentiu.tudor@nxp.com> +Date: Fri, 13 Apr 2018 11:52:44 +0300 +Subject: [PATCH] bus: fsl-mc: Propagate driver_override for a child DPRC's + children + +When a child DPRC is bound to the vfio_fsl_mc driver via +driver_override, its own children should not be bound to corresponding +host kernel drivers, but instead should be bound to the vfio_fsl_mc +driver as well. + +Currently, when a child container is scanned by the vfio_fsl_mc +driver, child devices found are automatically bound to corresponding +host kernel drivers (e.g., DPMCP and DPBP objects are bound to the +fsl_mc_allocator driver, DPNI objects are bound to the ldpaa_eth +driver, etc), Then, the user has to manually unbind these child +devices from their drivers, set the driver_override sysfs attribute +to vfio_fsl_mc driver, for each of them and rebind them. + +Signed-off-by: J. German Rivera <German.Rivera@freescale.com> +Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> +Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com> +Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> +--- + drivers/bus/fsl-mc/dprc-driver.c | 16 +++++++++++----- + drivers/bus/fsl-mc/fsl-mc-bus.c | 19 +++++++++++++++++-- + drivers/bus/fsl-mc/fsl-mc-private.h | 2 ++ + include/linux/fsl/mc.h | 2 ++ + 4 files changed, 32 insertions(+), 7 deletions(-) + +--- a/drivers/bus/fsl-mc/dprc-driver.c ++++ b/drivers/bus/fsl-mc/dprc-driver.c +@@ -156,6 +156,8 @@ static void check_plugged_state_change(s + * dprc_add_new_devices - Adds devices to the logical bus for a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object ++ * @driver_override: driver override to apply to new objects found in the ++ * DPRC, or NULL, if none. + * @obj_desc_array: array of device descriptors for child devices currently + * present in the physical DPRC. + * @num_child_objects_in_mc: number of entries in obj_desc_array +@@ -165,6 +167,7 @@ static void check_plugged_state_change(s + * in the physical DPRC. + */ + static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev, ++ const char *driver_override, + struct fsl_mc_obj_desc *obj_desc_array, + int num_child_objects_in_mc) + { +@@ -189,7 +192,7 @@ static void dprc_add_new_devices(struct + } + + error = fsl_mc_device_add(obj_desc, NULL, &mc_bus_dev->dev, +- &child_dev); ++ driver_override, &child_dev); + if (error < 0) + continue; + } +@@ -199,6 +202,8 @@ static void dprc_add_new_devices(struct + * dprc_scan_objects - Discover objects in a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object ++ * @driver_override: driver override to apply to new objects found in the ++ * DPRC, or NULL, if none. + * @total_irq_count: If argument is provided the function populates the + * total number of IRQs created by objects in the DPRC. + * +@@ -215,6 +220,7 @@ static void dprc_add_new_devices(struct + * of the device drivers for the non-allocatable devices. + */ + int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, ++ const char *driver_override, + unsigned int *total_irq_count) + { + int num_child_objects; +@@ -315,7 +321,7 @@ int dprc_scan_objects(struct fsl_mc_devi + dprc_remove_devices(mc_bus_dev, child_obj_desc_array, + num_child_objects); + +- dprc_add_new_devices(mc_bus_dev, child_obj_desc_array, ++ dprc_add_new_devices(mc_bus_dev, driver_override, child_obj_desc_array, + num_child_objects); + + if (child_obj_desc_array) +@@ -344,7 +350,7 @@ static int dprc_scan_container(struct fs + * Discover objects in the DPRC: + */ + mutex_lock(&mc_bus->scan_mutex); +- error = dprc_scan_objects(mc_bus_dev, NULL); ++ error = dprc_scan_objects(mc_bus_dev, NULL, NULL); + mutex_unlock(&mc_bus->scan_mutex); + if (error < 0) { + fsl_mc_cleanup_all_resource_pools(mc_bus_dev); +@@ -373,7 +379,7 @@ static ssize_t rescan_store(struct devic + + if (val) { + mutex_lock(&root_mc_bus->scan_mutex); +- dprc_scan_objects(root_mc_dev, NULL); ++ dprc_scan_objects(root_mc_dev, NULL, NULL); + mutex_unlock(&root_mc_bus->scan_mutex); + } + +@@ -442,7 +448,7 @@ static irqreturn_t dprc_irq0_handler_thr + DPRC_IRQ_EVENT_OBJ_CREATED)) { + unsigned int irq_count; + +- error = dprc_scan_objects(mc_dev, &irq_count); ++ error = dprc_scan_objects(mc_dev, NULL, &irq_count); + if (error < 0) { + /* + * If the error is -ENXIO, we ignore it, as it indicates +--- a/drivers/bus/fsl-mc/fsl-mc-bus.c ++++ b/drivers/bus/fsl-mc/fsl-mc-bus.c +@@ -165,7 +165,7 @@ static int scan_fsl_mc_bus(struct device + 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); ++ dprc_scan_objects(root_mc_dev, NULL, NULL); + mutex_unlock(&root_mc_bus->scan_mutex); + + exit: +@@ -597,6 +597,7 @@ static void fsl_mc_device_release(struct + int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, + struct fsl_mc_io *mc_io, + struct device *parent_dev, ++ const char *driver_override, + struct fsl_mc_device **new_mc_dev) + { + int error; +@@ -629,6 +630,19 @@ int fsl_mc_device_add(struct fsl_mc_obj_ + + mc_dev->obj_desc = *obj_desc; + mc_dev->mc_io = mc_io; ++ ++ if (driver_override) { ++ /* ++ * We trust driver_override, so we don't need to use ++ * kstrndup() here ++ */ ++ mc_dev->driver_override = kstrdup(driver_override, GFP_KERNEL); ++ if (!mc_dev->driver_override) { ++ error = -ENOMEM; ++ goto error_cleanup_dev; ++ } ++ } ++ + device_initialize(&mc_dev->dev); + mc_dev->dev.parent = parent_dev; + mc_dev->dev.bus = &fsl_mc_bus_type; +@@ -924,7 +938,8 @@ static int fsl_mc_bus_probe(struct platf + obj_desc.irq_count = 1; + obj_desc.region_count = 0; + +- error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev); ++ error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, NULL, ++ &mc_bus_dev); + if (error < 0) + goto error_cleanup_mc_io; + +--- a/drivers/bus/fsl-mc/fsl-mc-private.h ++++ b/drivers/bus/fsl-mc/fsl-mc-private.h +@@ -558,6 +558,7 @@ struct fsl_mc_bus { + int __must_check fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, + struct fsl_mc_io *mc_io, + struct device *parent_dev, ++ const char *driver_override, + struct fsl_mc_device **new_mc_dev); + + void fsl_mc_device_remove(struct fsl_mc_device *mc_dev); +@@ -567,6 +568,7 @@ int __init dprc_driver_init(void); + void dprc_driver_exit(void); + + int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, ++ const char *driver_override, + unsigned int *total_irq_count); + int __init fsl_mc_allocator_driver_init(void); + +--- a/include/linux/fsl/mc.h ++++ b/include/linux/fsl/mc.h +@@ -162,6 +162,7 @@ struct fsl_mc_obj_desc { + * @regions: pointer to array of MMIO region entries + * @irqs: pointer to array of pointers to interrupts allocated to this device + * @resource: generic resource associated with this MC object device, if any. ++ * @driver_override: Driver name to force a match + * + * Generic device object for MC object devices that are "attached" to a + * MC bus. +@@ -195,6 +196,7 @@ struct fsl_mc_device { + struct fsl_mc_device_irq **irqs; + struct fsl_mc_resource *resource; + struct device_link *consumer_link; ++ const char *driver_override; + }; + + #define to_fsl_mc_device(_dev) \ |