v4.19.13 snapshot.
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
new file mode 100644
index 0000000..5d8266c
--- /dev/null
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -0,0 +1,948 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Freescale Management Complex (MC) bus driver
+ *
+ * Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
+ * Author: German Rivera <German.Rivera@freescale.com>
+ *
+ */
+
+#define pr_fmt(fmt) "fsl-mc: " fmt
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/bitops.h>
+#include <linux/msi.h>
+#include <linux/dma-mapping.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * Default DMA mask for devices on a fsl-mc bus
+ */
+#define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
+
+/**
+ * struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
+ * @root_mc_bus_dev: fsl-mc device representing the root DPRC
+ * @num_translation_ranges: number of entries in addr_translation_ranges
+ * @translation_ranges: array of bus to system address translation ranges
+ */
+struct fsl_mc {
+ struct fsl_mc_device *root_mc_bus_dev;
+ u8 num_translation_ranges;
+ struct fsl_mc_addr_translation_range *translation_ranges;
+};
+
+/**
+ * struct fsl_mc_addr_translation_range - bus to system address translation
+ * range
+ * @mc_region_type: Type of MC region for the range being translated
+ * @start_mc_offset: Start MC offset of the range being translated
+ * @end_mc_offset: MC offset of the first byte after the range (last MC
+ * offset of the range is end_mc_offset - 1)
+ * @start_phys_addr: system physical address corresponding to start_mc_addr
+ */
+struct fsl_mc_addr_translation_range {
+ enum dprc_region_type mc_region_type;
+ u64 start_mc_offset;
+ u64 end_mc_offset;
+ phys_addr_t start_phys_addr;
+};
+
+/**
+ * struct mc_version
+ * @major: Major version number: incremented on API compatibility changes
+ * @minor: Minor version number: incremented on API additions (that are
+ * backward compatible); reset when major version is incremented
+ * @revision: Internal revision number: incremented on implementation changes
+ * and/or bug fixes that have no impact on API
+ */
+struct mc_version {
+ u32 major;
+ u32 minor;
+ u32 revision;
+};
+
+/**
+ * fsl_mc_bus_match - device to driver matching callback
+ * @dev: the fsl-mc device to match against
+ * @drv: the device driver to search for matching fsl-mc object type
+ * structures
+ *
+ * Returns 1 on success, 0 otherwise.
+ */
+static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv)
+{
+ const struct fsl_mc_device_id *id;
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+ struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv);
+ bool found = false;
+
+ if (!mc_drv->match_id_table)
+ goto out;
+
+ /*
+ * If the object is not 'plugged' don't match.
+ * Only exception is the root DPRC, which is a special case.
+ */
+ if ((mc_dev->obj_desc.state & FSL_MC_OBJ_STATE_PLUGGED) == 0 &&
+ !fsl_mc_is_root_dprc(&mc_dev->dev))
+ goto out;
+
+ /*
+ * Traverse the match_id table of the given driver, trying to find
+ * a matching for the given device.
+ */
+ for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) {
+ if (id->vendor == mc_dev->obj_desc.vendor &&
+ strcmp(id->obj_type, mc_dev->obj_desc.type) == 0) {
+ found = true;
+
+ break;
+ }
+ }
+
+out:
+ dev_dbg(dev, "%smatched\n", found ? "" : "not ");
+ return found;
+}
+
+/**
+ * fsl_mc_bus_uevent - callback invoked when a device is added
+ */
+static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+ if (add_uevent_var(env, "MODALIAS=fsl-mc:v%08Xd%s",
+ mc_dev->obj_desc.vendor,
+ mc_dev->obj_desc.type))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+ return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
+ mc_dev->obj_desc.type);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *fsl_mc_dev_attrs[] = {
+ &dev_attr_modalias.attr,
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(fsl_mc_dev);
+
+struct bus_type fsl_mc_bus_type = {
+ .name = "fsl-mc",
+ .match = fsl_mc_bus_match,
+ .uevent = fsl_mc_bus_uevent,
+ .dev_groups = fsl_mc_dev_groups,
+};
+EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
+
+struct device_type fsl_mc_bus_dprc_type = {
+ .name = "fsl_mc_bus_dprc"
+};
+
+struct device_type fsl_mc_bus_dpni_type = {
+ .name = "fsl_mc_bus_dpni"
+};
+
+struct device_type fsl_mc_bus_dpio_type = {
+ .name = "fsl_mc_bus_dpio"
+};
+
+struct device_type fsl_mc_bus_dpsw_type = {
+ .name = "fsl_mc_bus_dpsw"
+};
+
+struct device_type fsl_mc_bus_dpbp_type = {
+ .name = "fsl_mc_bus_dpbp"
+};
+
+struct device_type fsl_mc_bus_dpcon_type = {
+ .name = "fsl_mc_bus_dpcon"
+};
+
+struct device_type fsl_mc_bus_dpmcp_type = {
+ .name = "fsl_mc_bus_dpmcp"
+};
+
+struct device_type fsl_mc_bus_dpmac_type = {
+ .name = "fsl_mc_bus_dpmac"
+};
+
+struct device_type fsl_mc_bus_dprtc_type = {
+ .name = "fsl_mc_bus_dprtc"
+};
+
+static struct device_type *fsl_mc_get_device_type(const char *type)
+{
+ static const struct {
+ struct device_type *dev_type;
+ const char *type;
+ } dev_types[] = {
+ { &fsl_mc_bus_dprc_type, "dprc" },
+ { &fsl_mc_bus_dpni_type, "dpni" },
+ { &fsl_mc_bus_dpio_type, "dpio" },
+ { &fsl_mc_bus_dpsw_type, "dpsw" },
+ { &fsl_mc_bus_dpbp_type, "dpbp" },
+ { &fsl_mc_bus_dpcon_type, "dpcon" },
+ { &fsl_mc_bus_dpmcp_type, "dpmcp" },
+ { &fsl_mc_bus_dpmac_type, "dpmac" },
+ { &fsl_mc_bus_dprtc_type, "dprtc" },
+ { NULL, NULL }
+ };
+ int i;
+
+ for (i = 0; dev_types[i].dev_type; i++)
+ if (!strcmp(dev_types[i].type, type))
+ return dev_types[i].dev_type;
+
+ return NULL;
+}
+
+static int fsl_mc_driver_probe(struct device *dev)
+{
+ struct fsl_mc_driver *mc_drv;
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+ int error;
+
+ mc_drv = to_fsl_mc_driver(dev->driver);
+
+ error = mc_drv->probe(mc_dev);
+ if (error < 0) {
+ if (error != -EPROBE_DEFER)
+ dev_err(dev, "%s failed: %d\n", __func__, error);
+ return error;
+ }
+
+ return 0;
+}
+
+static int fsl_mc_driver_remove(struct device *dev)
+{
+ struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+ int error;
+
+ error = mc_drv->remove(mc_dev);
+ if (error < 0) {
+ dev_err(dev, "%s failed: %d\n", __func__, error);
+ return error;
+ }
+
+ return 0;
+}
+
+static void fsl_mc_driver_shutdown(struct device *dev)
+{
+ struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+ mc_drv->shutdown(mc_dev);
+}
+
+/**
+ * __fsl_mc_driver_register - registers a child device driver with the
+ * MC bus
+ *
+ * This function is implicitly invoked from the registration function of
+ * fsl_mc device drivers, which is generated by the
+ * module_fsl_mc_driver() macro.
+ */
+int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver,
+ struct module *owner)
+{
+ int error;
+
+ mc_driver->driver.owner = owner;
+ mc_driver->driver.bus = &fsl_mc_bus_type;
+
+ if (mc_driver->probe)
+ mc_driver->driver.probe = fsl_mc_driver_probe;
+
+ if (mc_driver->remove)
+ mc_driver->driver.remove = fsl_mc_driver_remove;
+
+ if (mc_driver->shutdown)
+ mc_driver->driver.shutdown = fsl_mc_driver_shutdown;
+
+ error = driver_register(&mc_driver->driver);
+ if (error < 0) {
+ pr_err("driver_register() failed for %s: %d\n",
+ mc_driver->driver.name, error);
+ return error;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(__fsl_mc_driver_register);
+
+/**
+ * fsl_mc_driver_unregister - unregisters a device driver from the
+ * MC bus
+ */
+void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver)
+{
+ driver_unregister(&mc_driver->driver);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
+
+/**
+ * mc_get_version() - Retrieves the Management Complex firmware
+ * version information
+ * @mc_io: Pointer to opaque I/O object
+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
+ * @mc_ver_info: Returned version information structure
+ *
+ * Return: '0' on Success; Error code otherwise.
+ */
+static int mc_get_version(struct fsl_mc_io *mc_io,
+ u32 cmd_flags,
+ struct mc_version *mc_ver_info)
+{
+ struct fsl_mc_command cmd = { 0 };
+ struct dpmng_rsp_get_version *rsp_params;
+ int err;
+
+ /* prepare command */
+ cmd.header = mc_encode_cmd_header(DPMNG_CMDID_GET_VERSION,
+ cmd_flags,
+ 0);
+
+ /* send command to mc*/
+ err = mc_send_command(mc_io, &cmd);
+ if (err)
+ return err;
+
+ /* retrieve response parameters */
+ rsp_params = (struct dpmng_rsp_get_version *)cmd.params;
+ mc_ver_info->revision = le32_to_cpu(rsp_params->revision);
+ mc_ver_info->major = le32_to_cpu(rsp_params->version_major);
+ mc_ver_info->minor = le32_to_cpu(rsp_params->version_minor);
+
+ return 0;
+}
+
+/**
+ * fsl_mc_get_root_dprc - function to traverse to the root dprc
+ */
+static void fsl_mc_get_root_dprc(struct device *dev,
+ struct device **root_dprc_dev)
+{
+ if (!dev) {
+ *root_dprc_dev = NULL;
+ } else if (!dev_is_fsl_mc(dev)) {
+ *root_dprc_dev = NULL;
+ } else {
+ *root_dprc_dev = dev;
+ while (dev_is_fsl_mc((*root_dprc_dev)->parent))
+ *root_dprc_dev = (*root_dprc_dev)->parent;
+ }
+}
+
+static int get_dprc_attr(struct fsl_mc_io *mc_io,
+ int container_id, struct dprc_attributes *attr)
+{
+ u16 dprc_handle;
+ int error;
+
+ error = dprc_open(mc_io, 0, container_id, &dprc_handle);
+ if (error < 0) {
+ dev_err(mc_io->dev, "dprc_open() failed: %d\n", error);
+ return error;
+ }
+
+ memset(attr, 0, sizeof(struct dprc_attributes));
+ error = dprc_get_attributes(mc_io, 0, dprc_handle, attr);
+ if (error < 0) {
+ dev_err(mc_io->dev, "dprc_get_attributes() failed: %d\n",
+ error);
+ goto common_cleanup;
+ }
+
+ error = 0;
+
+common_cleanup:
+ (void)dprc_close(mc_io, 0, dprc_handle);
+ return error;
+}
+
+static int get_dprc_icid(struct fsl_mc_io *mc_io,
+ int container_id, u16 *icid)
+{
+ struct dprc_attributes attr;
+ int error;
+
+ error = get_dprc_attr(mc_io, container_id, &attr);
+ if (error == 0)
+ *icid = attr.icid;
+
+ return error;
+}
+
+static int translate_mc_addr(struct fsl_mc_device *mc_dev,
+ enum dprc_region_type mc_region_type,
+ u64 mc_offset, phys_addr_t *phys_addr)
+{
+ int i;
+ struct device *root_dprc_dev;
+ struct fsl_mc *mc;
+
+ fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev);
+ mc = dev_get_drvdata(root_dprc_dev->parent);
+
+ if (mc->num_translation_ranges == 0) {
+ /*
+ * Do identity mapping:
+ */
+ *phys_addr = mc_offset;
+ return 0;
+ }
+
+ for (i = 0; i < mc->num_translation_ranges; i++) {
+ struct fsl_mc_addr_translation_range *range =
+ &mc->translation_ranges[i];
+
+ if (mc_region_type == range->mc_region_type &&
+ mc_offset >= range->start_mc_offset &&
+ mc_offset < range->end_mc_offset) {
+ *phys_addr = range->start_phys_addr +
+ (mc_offset - range->start_mc_offset);
+ return 0;
+ }
+ }
+
+ return -EFAULT;
+}
+
+static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev,
+ struct fsl_mc_device *mc_bus_dev)
+{
+ int i;
+ int error;
+ struct resource *regions;
+ struct fsl_mc_obj_desc *obj_desc = &mc_dev->obj_desc;
+ struct device *parent_dev = mc_dev->dev.parent;
+ enum dprc_region_type mc_region_type;
+
+ if (is_fsl_mc_bus_dprc(mc_dev) ||
+ is_fsl_mc_bus_dpmcp(mc_dev)) {
+ mc_region_type = DPRC_REGION_TYPE_MC_PORTAL;
+ } else if (is_fsl_mc_bus_dpio(mc_dev)) {
+ mc_region_type = DPRC_REGION_TYPE_QBMAN_PORTAL;
+ } else {
+ /*
+ * This function should not have been called for this MC object
+ * type, as this object type is not supposed to have MMIO
+ * regions
+ */
+ return -EINVAL;
+ }
+
+ regions = kmalloc_array(obj_desc->region_count,
+ sizeof(regions[0]), GFP_KERNEL);
+ if (!regions)
+ return -ENOMEM;
+
+ for (i = 0; i < obj_desc->region_count; i++) {
+ struct dprc_region_desc region_desc;
+
+ error = dprc_get_obj_region(mc_bus_dev->mc_io,
+ 0,
+ mc_bus_dev->mc_handle,
+ obj_desc->type,
+ obj_desc->id, i, ®ion_desc);
+ if (error < 0) {
+ dev_err(parent_dev,
+ "dprc_get_obj_region() failed: %d\n", error);
+ goto error_cleanup_regions;
+ }
+
+ error = translate_mc_addr(mc_dev, mc_region_type,
+ region_desc.base_offset,
+ ®ions[i].start);
+ if (error < 0) {
+ dev_err(parent_dev,
+ "Invalid MC offset: %#x (for %s.%d\'s region %d)\n",
+ region_desc.base_offset,
+ obj_desc->type, obj_desc->id, i);
+ goto error_cleanup_regions;
+ }
+
+ regions[i].end = regions[i].start + region_desc.size - 1;
+ regions[i].name = "fsl-mc object MMIO region";
+ regions[i].flags = IORESOURCE_IO;
+ if (region_desc.flags & DPRC_REGION_CACHEABLE)
+ regions[i].flags |= IORESOURCE_CACHEABLE;
+ }
+
+ mc_dev->regions = regions;
+ return 0;
+
+error_cleanup_regions:
+ kfree(regions);
+ return error;
+}
+
+/**
+ * fsl_mc_is_root_dprc - function to check if a given device is a root dprc
+ */
+bool fsl_mc_is_root_dprc(struct device *dev)
+{
+ struct device *root_dprc_dev;
+
+ fsl_mc_get_root_dprc(dev, &root_dprc_dev);
+ if (!root_dprc_dev)
+ return false;
+ return dev == root_dprc_dev;
+}
+
+static void fsl_mc_device_release(struct device *dev)
+{
+ struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+ kfree(mc_dev->regions);
+
+ if (is_fsl_mc_bus_dprc(mc_dev))
+ kfree(to_fsl_mc_bus(mc_dev));
+ else
+ kfree(mc_dev);
+}
+
+/**
+ * Add a newly discovered fsl-mc device to be visible in Linux
+ */
+int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
+ struct fsl_mc_io *mc_io,
+ struct device *parent_dev,
+ struct fsl_mc_device **new_mc_dev)
+{
+ int error;
+ struct fsl_mc_device *mc_dev = NULL;
+ struct fsl_mc_bus *mc_bus = NULL;
+ struct fsl_mc_device *parent_mc_dev;
+
+ if (dev_is_fsl_mc(parent_dev))
+ parent_mc_dev = to_fsl_mc_device(parent_dev);
+ else
+ parent_mc_dev = NULL;
+
+ if (strcmp(obj_desc->type, "dprc") == 0) {
+ /*
+ * Allocate an MC bus device object:
+ */
+ mc_bus = kzalloc(sizeof(*mc_bus), GFP_KERNEL);
+ if (!mc_bus)
+ return -ENOMEM;
+
+ mc_dev = &mc_bus->mc_dev;
+ } else {
+ /*
+ * Allocate a regular fsl_mc_device object:
+ */
+ mc_dev = kzalloc(sizeof(*mc_dev), GFP_KERNEL);
+ if (!mc_dev)
+ return -ENOMEM;
+ }
+
+ mc_dev->obj_desc = *obj_desc;
+ mc_dev->mc_io = mc_io;
+ device_initialize(&mc_dev->dev);
+ mc_dev->dev.parent = parent_dev;
+ mc_dev->dev.bus = &fsl_mc_bus_type;
+ mc_dev->dev.release = fsl_mc_device_release;
+ mc_dev->dev.type = fsl_mc_get_device_type(obj_desc->type);
+ if (!mc_dev->dev.type) {
+ error = -ENODEV;
+ dev_err(parent_dev, "unknown device type %s\n", obj_desc->type);
+ goto error_cleanup_dev;
+ }
+ dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id);
+
+ if (strcmp(obj_desc->type, "dprc") == 0) {
+ struct fsl_mc_io *mc_io2;
+
+ mc_dev->flags |= FSL_MC_IS_DPRC;
+
+ /*
+ * To get the DPRC's ICID, we need to open the DPRC
+ * in get_dprc_icid(). For child DPRCs, we do so using the
+ * parent DPRC's MC portal instead of the child DPRC's MC
+ * portal, in case the child DPRC is already opened with
+ * its own portal (e.g., the DPRC used by AIOP).
+ *
+ * NOTE: There cannot be more than one active open for a
+ * given MC object, using the same MC portal.
+ */
+ if (parent_mc_dev) {
+ /*
+ * device being added is a child DPRC device
+ */
+ mc_io2 = parent_mc_dev->mc_io;
+ } else {
+ /*
+ * device being added is the root DPRC device
+ */
+ if (!mc_io) {
+ error = -EINVAL;
+ goto error_cleanup_dev;
+ }
+
+ mc_io2 = mc_io;
+ }
+
+ error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid);
+ if (error < 0)
+ goto error_cleanup_dev;
+ } else {
+ /*
+ * A non-DPRC object has to be a child of a DPRC, use the
+ * parent's ICID and interrupt domain.
+ */
+ mc_dev->icid = parent_mc_dev->icid;
+ mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK;
+ mc_dev->dev.dma_mask = &mc_dev->dma_mask;
+ dev_set_msi_domain(&mc_dev->dev,
+ dev_get_msi_domain(&parent_mc_dev->dev));
+ }
+
+ /*
+ * Get MMIO regions for the device from the MC:
+ *
+ * NOTE: the root DPRC is a special case as its MMIO region is
+ * obtained from the device tree
+ */
+ if (parent_mc_dev && obj_desc->region_count != 0) {
+ error = fsl_mc_device_get_mmio_regions(mc_dev,
+ parent_mc_dev);
+ if (error < 0)
+ goto error_cleanup_dev;
+ }
+
+ /* Objects are coherent, unless 'no shareability' flag set. */
+ if (!(obj_desc->flags & FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY))
+ arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
+
+ /*
+ * The device-specific probe callback will get invoked by device_add()
+ */
+ error = device_add(&mc_dev->dev);
+ if (error < 0) {
+ dev_err(parent_dev,
+ "device_add() failed for device %s: %d\n",
+ dev_name(&mc_dev->dev), error);
+ goto error_cleanup_dev;
+ }
+
+ dev_dbg(parent_dev, "added %s\n", dev_name(&mc_dev->dev));
+
+ *new_mc_dev = mc_dev;
+ return 0;
+
+error_cleanup_dev:
+ kfree(mc_dev->regions);
+ kfree(mc_bus);
+ kfree(mc_dev);
+
+ return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_device_add);
+
+/**
+ * fsl_mc_device_remove - Remove an fsl-mc device from being visible to
+ * Linux
+ *
+ * @mc_dev: Pointer to an fsl-mc device
+ */
+void fsl_mc_device_remove(struct fsl_mc_device *mc_dev)
+{
+ /*
+ * The device-specific remove callback will get invoked by device_del()
+ */
+ device_del(&mc_dev->dev);
+ put_device(&mc_dev->dev);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_device_remove);
+
+static int parse_mc_ranges(struct device *dev,
+ int *paddr_cells,
+ int *mc_addr_cells,
+ int *mc_size_cells,
+ const __be32 **ranges_start)
+{
+ const __be32 *prop;
+ int range_tuple_cell_count;
+ int ranges_len;
+ int tuple_len;
+ struct device_node *mc_node = dev->of_node;
+
+ *ranges_start = of_get_property(mc_node, "ranges", &ranges_len);
+ if (!(*ranges_start) || !ranges_len) {
+ dev_warn(dev,
+ "missing or empty ranges property for device tree node '%s'\n",
+ mc_node->name);
+ return 0;
+ }
+
+ *paddr_cells = of_n_addr_cells(mc_node);
+
+ prop = of_get_property(mc_node, "#address-cells", NULL);
+ if (prop)
+ *mc_addr_cells = be32_to_cpup(prop);
+ else
+ *mc_addr_cells = *paddr_cells;
+
+ prop = of_get_property(mc_node, "#size-cells", NULL);
+ if (prop)
+ *mc_size_cells = be32_to_cpup(prop);
+ else
+ *mc_size_cells = of_n_size_cells(mc_node);
+
+ range_tuple_cell_count = *paddr_cells + *mc_addr_cells +
+ *mc_size_cells;
+
+ tuple_len = range_tuple_cell_count * sizeof(__be32);
+ if (ranges_len % tuple_len != 0) {
+ dev_err(dev, "malformed ranges property '%s'\n", mc_node->name);
+ return -EINVAL;
+ }
+
+ return ranges_len / tuple_len;
+}
+
+static int get_mc_addr_translation_ranges(struct device *dev,
+ struct fsl_mc_addr_translation_range
+ **ranges,
+ u8 *num_ranges)
+{
+ int ret;
+ int paddr_cells;
+ int mc_addr_cells;
+ int mc_size_cells;
+ int i;
+ const __be32 *ranges_start;
+ const __be32 *cell;
+
+ ret = parse_mc_ranges(dev,
+ &paddr_cells,
+ &mc_addr_cells,
+ &mc_size_cells,
+ &ranges_start);
+ if (ret < 0)
+ return ret;
+
+ *num_ranges = ret;
+ if (!ret) {
+ /*
+ * Missing or empty ranges property ("ranges;") for the
+ * 'fsl,qoriq-mc' node. In this case, identity mapping
+ * will be used.
+ */
+ *ranges = NULL;
+ return 0;
+ }
+
+ *ranges = devm_kcalloc(dev, *num_ranges,
+ sizeof(struct fsl_mc_addr_translation_range),
+ GFP_KERNEL);
+ if (!(*ranges))
+ return -ENOMEM;
+
+ cell = ranges_start;
+ for (i = 0; i < *num_ranges; ++i) {
+ struct fsl_mc_addr_translation_range *range = &(*ranges)[i];
+
+ range->mc_region_type = of_read_number(cell, 1);
+ range->start_mc_offset = of_read_number(cell + 1,
+ mc_addr_cells - 1);
+ cell += mc_addr_cells;
+ range->start_phys_addr = of_read_number(cell, paddr_cells);
+ cell += paddr_cells;
+ range->end_mc_offset = range->start_mc_offset +
+ of_read_number(cell, mc_size_cells);
+
+ cell += mc_size_cells;
+ }
+
+ return 0;
+}
+
+/**
+ * fsl_mc_bus_probe - callback invoked when the root MC bus is being
+ * added
+ */
+static int fsl_mc_bus_probe(struct platform_device *pdev)
+{
+ struct fsl_mc_obj_desc obj_desc;
+ int error;
+ struct fsl_mc *mc;
+ struct fsl_mc_device *mc_bus_dev = NULL;
+ struct fsl_mc_io *mc_io = NULL;
+ int container_id;
+ phys_addr_t mc_portal_phys_addr;
+ u32 mc_portal_size;
+ struct mc_version mc_version;
+ struct resource res;
+
+ mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
+ if (!mc)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, mc);
+
+ /*
+ * Get physical address of MC portal for the root DPRC:
+ */
+ error = of_address_to_resource(pdev->dev.of_node, 0, &res);
+ if (error < 0) {
+ dev_err(&pdev->dev,
+ "of_address_to_resource() failed for %pOF\n",
+ pdev->dev.of_node);
+ return error;
+ }
+
+ mc_portal_phys_addr = res.start;
+ mc_portal_size = resource_size(&res);
+ error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
+ mc_portal_size, NULL,
+ FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, &mc_io);
+ if (error < 0)
+ return error;
+
+ error = mc_get_version(mc_io, 0, &mc_version);
+ if (error != 0) {
+ dev_err(&pdev->dev,
+ "mc_get_version() failed with error %d\n", error);
+ goto error_cleanup_mc_io;
+ }
+
+ dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",
+ mc_version.major, mc_version.minor, mc_version.revision);
+
+ error = get_mc_addr_translation_ranges(&pdev->dev,
+ &mc->translation_ranges,
+ &mc->num_translation_ranges);
+ if (error < 0)
+ goto error_cleanup_mc_io;
+
+ error = dprc_get_container_id(mc_io, 0, &container_id);
+ if (error < 0) {
+ dev_err(&pdev->dev,
+ "dprc_get_container_id() failed: %d\n", error);
+ goto error_cleanup_mc_io;
+ }
+
+ memset(&obj_desc, 0, sizeof(struct fsl_mc_obj_desc));
+ error = dprc_get_api_version(mc_io, 0,
+ &obj_desc.ver_major,
+ &obj_desc.ver_minor);
+ if (error < 0)
+ goto error_cleanup_mc_io;
+
+ obj_desc.vendor = FSL_MC_VENDOR_FREESCALE;
+ strcpy(obj_desc.type, "dprc");
+ obj_desc.id = container_id;
+ obj_desc.irq_count = 1;
+ obj_desc.region_count = 0;
+
+ error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev);
+ if (error < 0)
+ goto error_cleanup_mc_io;
+
+ mc->root_mc_bus_dev = mc_bus_dev;
+ return 0;
+
+error_cleanup_mc_io:
+ fsl_destroy_mc_io(mc_io);
+ return error;
+}
+
+/**
+ * fsl_mc_bus_remove - callback invoked when the root MC bus is being
+ * removed
+ */
+static int fsl_mc_bus_remove(struct platform_device *pdev)
+{
+ struct fsl_mc *mc = platform_get_drvdata(pdev);
+
+ if (!fsl_mc_is_root_dprc(&mc->root_mc_bus_dev->dev))
+ return -EINVAL;
+
+ fsl_mc_device_remove(mc->root_mc_bus_dev);
+
+ fsl_destroy_mc_io(mc->root_mc_bus_dev->mc_io);
+ mc->root_mc_bus_dev->mc_io = NULL;
+
+ return 0;
+}
+
+static const struct of_device_id fsl_mc_bus_match_table[] = {
+ {.compatible = "fsl,qoriq-mc",},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table);
+
+static struct platform_driver fsl_mc_bus_driver = {
+ .driver = {
+ .name = "fsl_mc_bus",
+ .pm = NULL,
+ .of_match_table = fsl_mc_bus_match_table,
+ },
+ .probe = fsl_mc_bus_probe,
+ .remove = fsl_mc_bus_remove,
+};
+
+static int __init fsl_mc_bus_driver_init(void)
+{
+ int error;
+
+ error = bus_register(&fsl_mc_bus_type);
+ if (error < 0) {
+ pr_err("bus type registration failed: %d\n", error);
+ goto error_cleanup_cache;
+ }
+
+ error = platform_driver_register(&fsl_mc_bus_driver);
+ if (error < 0) {
+ pr_err("platform_driver_register() failed: %d\n", error);
+ goto error_cleanup_bus;
+ }
+
+ error = dprc_driver_init();
+ if (error < 0)
+ goto error_cleanup_driver;
+
+ error = fsl_mc_allocator_driver_init();
+ if (error < 0)
+ goto error_cleanup_dprc_driver;
+
+ return 0;
+
+error_cleanup_dprc_driver:
+ dprc_driver_exit();
+
+error_cleanup_driver:
+ platform_driver_unregister(&fsl_mc_bus_driver);
+
+error_cleanup_bus:
+ bus_unregister(&fsl_mc_bus_type);
+
+error_cleanup_cache:
+ return error;
+}
+postcore_initcall(fsl_mc_bus_driver_init);