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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Freescale Management Complex (MC) bus driver
- *
- * Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
- * Copyright 2019-2020 NXP
- * 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 <linux/acpi.h>
- #include <linux/iommu.h>
- #include "fsl-mc-private.h"
- /**
- * Default DMA mask for devices on a fsl-mc bus
- */
- #define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
- static struct fsl_mc_version mc_version;
- /**
- * 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;
- void *fsl_mc_regs;
- };
- /**
- * 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;
- };
- #define FSL_MC_FAPR 0x28
- #define MC_FAPR_PL BIT(18)
- #define MC_FAPR_BMT BIT(17)
- static phys_addr_t mc_portal_base_phys_addr;
- /**
- * 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;
- /* When driver_override is set, only bind to the matching driver */
- if (mc_dev->driver_override) {
- found = !strcmp(mc_dev->driver_override, mc_drv->driver.name);
- goto out;
- }
- 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 int fsl_mc_dma_configure(struct device *dev)
- {
- struct device *dma_dev = dev;
- struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
- u32 input_id = mc_dev->icid;
- while (dev_is_fsl_mc(dma_dev))
- dma_dev = dma_dev->parent;
- if (dev_of_node(dma_dev))
- return of_dma_configure_id(dev, dma_dev->of_node, 0, &input_id);
- return acpi_dma_configure_id(dev, DEV_DMA_COHERENT, &input_id);
- }
- 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 ssize_t driver_override_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
- {
- struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
- char *driver_override, *old = mc_dev->driver_override;
- char *cp;
- if (WARN_ON(dev->bus != &fsl_mc_bus_type))
- return -EINVAL;
- if (count >= (PAGE_SIZE - 1))
- return -EINVAL;
- driver_override = kstrndup(buf, count, GFP_KERNEL);
- if (!driver_override)
- return -ENOMEM;
- cp = strchr(driver_override, '\n');
- if (cp)
- *cp = '\0';
- if (strlen(driver_override)) {
- mc_dev->driver_override = driver_override;
- } else {
- kfree(driver_override);
- mc_dev->driver_override = NULL;
- }
- kfree(old);
- return count;
- }
- static ssize_t driver_override_show(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
- return snprintf(buf, PAGE_SIZE, "%s\n", mc_dev->driver_override);
- }
- static DEVICE_ATTR_RW(driver_override);
- static struct attribute *fsl_mc_dev_attrs[] = {
- &dev_attr_modalias.attr,
- &dev_attr_driver_override.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,
- .dma_configure = fsl_mc_dma_configure,
- .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"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dprc_type);
- struct device_type fsl_mc_bus_dpni_type = {
- .name = "fsl_mc_bus_dpni"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpni_type);
- struct device_type fsl_mc_bus_dpio_type = {
- .name = "fsl_mc_bus_dpio"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpio_type);
- struct device_type fsl_mc_bus_dpsw_type = {
- .name = "fsl_mc_bus_dpsw"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpsw_type);
- struct device_type fsl_mc_bus_dpbp_type = {
- .name = "fsl_mc_bus_dpbp"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpbp_type);
- struct device_type fsl_mc_bus_dpcon_type = {
- .name = "fsl_mc_bus_dpcon"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpcon_type);
- struct device_type fsl_mc_bus_dpmcp_type = {
- .name = "fsl_mc_bus_dpmcp"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpmcp_type);
- struct device_type fsl_mc_bus_dpmac_type = {
- .name = "fsl_mc_bus_dpmac"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpmac_type);
- struct device_type fsl_mc_bus_dprtc_type = {
- .name = "fsl_mc_bus_dprtc"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dprtc_type);
- struct device_type fsl_mc_bus_dpseci_type = {
- .name = "fsl_mc_bus_dpseci"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpseci_type);
- struct device_type fsl_mc_bus_dpdmux_type = {
- .name = "fsl_mc_bus_dpdmux"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpdmux_type);
- struct device_type fsl_mc_bus_dpdcei_type = {
- .name = "fsl_mc_bus_dpdcei"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpdcei_type);
- struct device_type fsl_mc_bus_dpaiop_type = {
- .name = "fsl_mc_bus_dpaiop"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpaiop_type);
- struct device_type fsl_mc_bus_dpci_type = {
- .name = "fsl_mc_bus_dpci"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpci_type);
- struct device_type fsl_mc_bus_dpdmai_type = {
- .name = "fsl_mc_bus_dpdmai"
- };
- EXPORT_SYMBOL_GPL(fsl_mc_bus_dpdmai_type);
- 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" },
- { &fsl_mc_bus_dpseci_type, "dpseci" },
- { &fsl_mc_bus_dpdmux_type, "dpdmux" },
- { &fsl_mc_bus_dpdcei_type, "dpdcei" },
- { &fsl_mc_bus_dpaiop_type, "dpaiop" },
- { &fsl_mc_bus_dpci_type, "dpci" },
- { &fsl_mc_bus_dpdmai_type, "dpdmai" },
- { 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 fsl_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_version - function to retrieve the MC f/w version information
- *
- * Return: mc version when called after fsl-mc-bus probe; NULL otherwise.
- */
- struct fsl_mc_version *fsl_mc_get_version(void)
- {
- if (mc_version.major)
- return &mc_version;
- return NULL;
- }
- EXPORT_SYMBOL_GPL(fsl_mc_get_version);
- /**
- * fsl_mc_get_root_dprc - function to traverse to the root dprc
- */
- 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, u32 *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;
- }
- /*
- * Older MC only returned region offset and no base address
- * If base address is in the region_desc use it otherwise
- * revert to old mechanism
- */
- if (region_desc.base_address) {
- regions[i].start = region_desc.base_address +
- region_desc.base_offset;
- } else {
- error = translate_mc_addr(mc_dev, mc_region_type,
- region_desc.base_offset,
- ®ions[i].start);
- /*
- * Some versions of the MC firmware wrongly report
- * 0 for register base address of the DPMCP associated
- * with child DPRC objects thus rendering them unusable.
- * This is particularly troublesome in ACPI boot
- * scenarios where the legacy way of extracting this
- * base address from the device tree does not apply.
- * Given that DPMCPs share the same base address,
- * workaround this by using the base address extracted
- * from the root DPRC container.
- */
- if (is_fsl_mc_bus_dprc(mc_dev) &&
- regions[i].start == region_desc.base_offset)
- regions[i].start += mc_portal_base_phys_addr;
- }
- 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 = region_desc.flags & IORESOURCE_BITS;
- regions[i].flags |= IORESOURCE_MEM;
- }
- 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;
- mutex_init(&mc_bus->scan_mutex);
- 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;
- mc_dev->dev.coherent_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;
- }
- /*
- * 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)
- {
- kfree(mc_dev->driver_override);
- mc_dev->driver_override = NULL;
- /*
- * 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);
- struct fsl_mc_device *fsl_mc_get_endpoint(struct fsl_mc_device *mc_dev)
- {
- struct fsl_mc_device *mc_bus_dev, *endpoint;
- struct fsl_mc_obj_desc endpoint_desc = {{ 0 }};
- struct dprc_endpoint endpoint1 = {{ 0 }};
- struct dprc_endpoint endpoint2 = {{ 0 }};
- int state, err;
- mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
- strcpy(endpoint1.type, mc_dev->obj_desc.type);
- endpoint1.id = mc_dev->obj_desc.id;
- err = dprc_get_connection(mc_bus_dev->mc_io, 0,
- mc_bus_dev->mc_handle,
- &endpoint1, &endpoint2,
- &state);
- if (err == -ENOTCONN || state == -1)
- return ERR_PTR(-ENOTCONN);
- if (err < 0) {
- dev_err(&mc_bus_dev->dev, "dprc_get_connection() = %d\n", err);
- return ERR_PTR(err);
- }
- strcpy(endpoint_desc.type, endpoint2.type);
- endpoint_desc.id = endpoint2.id;
- endpoint = fsl_mc_device_lookup(&endpoint_desc, mc_bus_dev);
- return endpoint;
- }
- EXPORT_SYMBOL_GPL(fsl_mc_get_endpoint);
- 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 '%pOFn'\n",
- mc_node);
- 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 '%pOFn'\n", mc_node);
- 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, mc_stream_id;
- struct resource *plat_res;
- mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
- if (!mc)
- return -ENOMEM;
- platform_set_drvdata(pdev, mc);
- plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (plat_res) {
- mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
- if (IS_ERR(mc->fsl_mc_regs))
- return PTR_ERR(mc->fsl_mc_regs);
- }
- if (mc->fsl_mc_regs && IS_ENABLED(CONFIG_ACPI) &&
- !dev_of_node(&pdev->dev)) {
- mc_stream_id = readl(mc->fsl_mc_regs + FSL_MC_FAPR);
- /*
- * HW ORs the PL and BMT bit, places the result in bit 15 of
- * the StreamID and ORs in the ICID. Calculate it accordingly.
- */
- mc_stream_id = (mc_stream_id & 0xffff) |
- ((mc_stream_id & (MC_FAPR_PL | MC_FAPR_BMT)) ?
- 0x4000 : 0);
- error = acpi_dma_configure_id(&pdev->dev, DEV_DMA_COHERENT,
- &mc_stream_id);
- if (error)
- dev_warn(&pdev->dev, "failed to configure dma: %d.\n",
- error);
- }
- /*
- * Get physical address of MC portal for the root DPRC:
- */
- plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mc_portal_phys_addr = plat_res->start;
- mc_portal_size = resource_size(plat_res);
- mc_portal_base_phys_addr = mc_portal_phys_addr & ~0x3ffffff;
- 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);
- if (dev_of_node(&pdev->dev)) {
- 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;
- mc_bus_dev->dev.fwnode = pdev->dev.fwnode;
- 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 const struct acpi_device_id fsl_mc_bus_acpi_match_table[] = {
- {"NXP0008", 0 },
- { }
- };
- MODULE_DEVICE_TABLE(acpi, fsl_mc_bus_acpi_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,
- .acpi_match_table = fsl_mc_bus_acpi_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);
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