--- /dev/null
+From 2b9110586a96afc0d0e246835da176c48ae7c973 Mon Sep 17 00:00:00 2001
+From: "J. German Rivera" <German.Rivera@freescale.com>
+Date: Fri, 13 Mar 2015 15:03:32 -0500
+Subject: [PATCH 192/226] staging: 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>
+---
+ drivers/staging/fsl-mc/bus/dprc-driver.c | 14 ++++++++++----
+ drivers/staging/fsl-mc/bus/mc-bus.c | 20 +++++++++++++++++---
+ drivers/staging/fsl-mc/include/mc-private.h | 2 ++
+ drivers/staging/fsl-mc/include/mc.h | 2 ++
+ 4 files changed, 31 insertions(+), 7 deletions(-)
+
+--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
++++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
+@@ -152,6 +152,8 @@ 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
+@@ -161,6 +163,7 @@ 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 dprc_obj_desc *obj_desc_array,
+ int num_child_objects_in_mc)
+ {
+@@ -184,7 +187,7 @@ 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;
+ }
+@@ -243,6 +246,8 @@ 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
++ * @driver_override: driver override to apply to new objects found in the DPRC,
++ * or NULL, if none.
+ * @total_irq_count: total number of IRQs needed by objects in the DPRC.
+ *
+ * Detects objects added and removed from a DPRC and synchronizes the
+@@ -258,6 +263,7 @@ static void dprc_cleanup_all_resource_po
+ * 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;
+@@ -338,7 +344,7 @@ 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)
+@@ -369,7 +375,7 @@ 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, &irq_count);
++ error = dprc_scan_objects(mc_bus_dev, NULL, &irq_count);
+ mutex_unlock(&mc_bus->scan_mutex);
+ if (error < 0)
+ goto error;
+@@ -456,7 +462,7 @@ 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/staging/fsl-mc/bus/mc-bus.c
++++ b/drivers/staging/fsl-mc/bus/mc-bus.c
+@@ -116,7 +116,7 @@ static ssize_t rescan_store(struct devic
+
+ if (val) {
+ mutex_lock(&root_mc_bus->scan_mutex);
+- dprc_scan_objects(root_mc_dev, &irq_count);
++ dprc_scan_objects(root_mc_dev, NULL, &irq_count);
+ mutex_unlock(&root_mc_bus->scan_mutex);
+ }
+
+@@ -149,7 +149,7 @@ 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, &irq_count);
++ dprc_scan_objects(root_mc_dev, NULL, &irq_count);
+ mutex_unlock(&root_mc_bus->scan_mutex);
+ }
+
+@@ -503,6 +503,7 @@ bool fsl_mc_is_root_dprc(struct device *
+ int fsl_mc_device_add(struct dprc_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;
+@@ -535,6 +536,18 @@ int fsl_mc_device_add(struct dprc_obj_de
+
+ 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;
+@@ -858,7 +871,8 @@ 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/staging/fsl-mc/include/mc-private.h
++++ b/drivers/staging/fsl-mc/include/mc-private.h
+@@ -110,6 +110,7 @@ struct fsl_mc_bus {
+ int __must_check fsl_mc_device_add(struct dprc_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);
+@@ -117,6 +118,7 @@ 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,
++ const char *driver_override,
+ unsigned int *total_irq_count);
+
+ int __init dprc_driver_init(void);
+--- a/drivers/staging/fsl-mc/include/mc.h
++++ b/drivers/staging/fsl-mc/include/mc.h
+@@ -129,6 +129,7 @@ struct fsl_mc_device_irq {
+ * @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.
+@@ -161,6 +162,7 @@ struct fsl_mc_device {
+ struct resource *regions;
+ struct fsl_mc_device_irq **irqs;
+ struct fsl_mc_resource *resource;
++ const char *driver_override;
+ };
+
+ #define to_fsl_mc_device(_dev) \
projects / openwrt / staging / yousong.git / blobdiff