764 lines
18 KiB
C
764 lines
18 KiB
C
/*
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* Freescale Management Complex (MC) bus driver
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*
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* Copyright (C) 2014 Freescale Semiconductor, Inc.
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* Author: German Rivera <German.Rivera@freescale.com>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include "../include/mc-private.h"
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_address.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/limits.h>
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#include "../include/dpmng.h"
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#include "../include/mc-sys.h"
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#include "dprc-cmd.h"
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static struct kmem_cache *mc_dev_cache;
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/**
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* fsl_mc_bus_match - device to driver matching callback
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* @dev: the MC object device structure to match against
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* @drv: the device driver to search for matching MC object device id
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* structures
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*
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* Returns 1 on success, 0 otherwise.
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*/
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static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv)
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{
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const struct fsl_mc_device_match_id *id;
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv);
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bool found = false;
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if (WARN_ON(!fsl_mc_bus_type.dev_root))
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goto out;
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if (!mc_drv->match_id_table)
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goto out;
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/*
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* If the object is not 'plugged' don't match.
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* Only exception is the root DPRC, which is a special case.
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*/
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if ((mc_dev->obj_desc.state & DPRC_OBJ_STATE_PLUGGED) == 0 &&
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&mc_dev->dev != fsl_mc_bus_type.dev_root)
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goto out;
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/*
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* Traverse the match_id table of the given driver, trying to find
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* a matching for the given MC object device.
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*/
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for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) {
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if (id->vendor == mc_dev->obj_desc.vendor &&
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strcmp(id->obj_type, mc_dev->obj_desc.type) == 0 &&
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id->ver_major == mc_dev->obj_desc.ver_major &&
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id->ver_minor == mc_dev->obj_desc.ver_minor) {
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found = true;
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break;
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}
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}
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out:
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dev_dbg(dev, "%smatched\n", found ? "" : "not ");
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return found;
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}
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/**
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* fsl_mc_bus_uevent - callback invoked when a device is added
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*/
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static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
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{
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pr_debug("%s invoked\n", __func__);
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return 0;
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}
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struct bus_type fsl_mc_bus_type = {
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.name = "fsl-mc",
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.match = fsl_mc_bus_match,
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.uevent = fsl_mc_bus_uevent,
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};
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EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
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static int fsl_mc_driver_probe(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv;
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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int error;
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if (WARN_ON(!dev->driver))
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return -EINVAL;
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mc_drv = to_fsl_mc_driver(dev->driver);
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if (WARN_ON(!mc_drv->probe))
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return -EINVAL;
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error = mc_drv->probe(mc_dev);
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if (error < 0) {
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dev_err(dev, "MC object device probe callback failed: %d\n",
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error);
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return error;
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}
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return 0;
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}
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static int fsl_mc_driver_remove(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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int error;
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if (WARN_ON(!dev->driver))
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return -EINVAL;
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error = mc_drv->remove(mc_dev);
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if (error < 0) {
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dev_err(dev,
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"MC object device remove callback failed: %d\n",
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error);
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return error;
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}
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return 0;
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}
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static void fsl_mc_driver_shutdown(struct device *dev)
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{
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struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
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struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
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mc_drv->shutdown(mc_dev);
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}
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/**
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* __fsl_mc_driver_register - registers a child device driver with the
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* MC bus
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*
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* This function is implicitly invoked from the registration function of
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* fsl_mc device drivers, which is generated by the
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* module_fsl_mc_driver() macro.
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*/
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int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver,
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struct module *owner)
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{
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int error;
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mc_driver->driver.owner = owner;
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mc_driver->driver.bus = &fsl_mc_bus_type;
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if (mc_driver->probe)
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mc_driver->driver.probe = fsl_mc_driver_probe;
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if (mc_driver->remove)
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mc_driver->driver.remove = fsl_mc_driver_remove;
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if (mc_driver->shutdown)
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mc_driver->driver.shutdown = fsl_mc_driver_shutdown;
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error = driver_register(&mc_driver->driver);
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if (error < 0) {
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pr_err("driver_register() failed for %s: %d\n",
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mc_driver->driver.name, error);
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return error;
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}
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pr_info("MC object device driver %s registered\n",
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mc_driver->driver.name);
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return 0;
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}
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EXPORT_SYMBOL_GPL(__fsl_mc_driver_register);
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/**
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* fsl_mc_driver_unregister - unregisters a device driver from the
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* MC bus
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*/
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void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver)
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{
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driver_unregister(&mc_driver->driver);
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}
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EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
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static int get_dprc_icid(struct fsl_mc_io *mc_io,
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int container_id, uint16_t *icid)
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{
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uint16_t dprc_handle;
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struct dprc_attributes attr;
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int error;
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error = dprc_open(mc_io, container_id, &dprc_handle);
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if (error < 0) {
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pr_err("dprc_open() failed: %d\n", error);
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return error;
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}
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memset(&attr, 0, sizeof(attr));
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error = dprc_get_attributes(mc_io, dprc_handle, &attr);
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if (error < 0) {
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pr_err("dprc_get_attributes() failed: %d\n", error);
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goto common_cleanup;
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}
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*icid = attr.icid;
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error = 0;
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common_cleanup:
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(void)dprc_close(mc_io, dprc_handle);
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return error;
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}
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static int translate_mc_addr(uint64_t mc_addr, phys_addr_t *phys_addr)
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{
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int i;
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struct fsl_mc *mc = dev_get_drvdata(fsl_mc_bus_type.dev_root->parent);
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if (mc->num_translation_ranges == 0) {
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/*
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* Do identity mapping:
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*/
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*phys_addr = mc_addr;
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return 0;
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}
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for (i = 0; i < mc->num_translation_ranges; i++) {
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struct fsl_mc_addr_translation_range *range =
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&mc->translation_ranges[i];
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if (mc_addr >= range->start_mc_addr &&
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mc_addr < range->end_mc_addr) {
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*phys_addr = range->start_phys_addr +
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(mc_addr - range->start_mc_addr);
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return 0;
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}
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}
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return -EFAULT;
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}
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static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev,
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struct fsl_mc_device *mc_bus_dev)
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{
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int i;
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int error;
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struct resource *regions;
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struct dprc_obj_desc *obj_desc = &mc_dev->obj_desc;
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struct device *parent_dev = mc_dev->dev.parent;
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regions = kmalloc_array(obj_desc->region_count,
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sizeof(regions[0]), GFP_KERNEL);
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if (!regions)
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return -ENOMEM;
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for (i = 0; i < obj_desc->region_count; i++) {
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struct dprc_region_desc region_desc;
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error = dprc_get_obj_region(mc_bus_dev->mc_io,
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mc_bus_dev->mc_handle,
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obj_desc->type,
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obj_desc->id, i, ®ion_desc);
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if (error < 0) {
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dev_err(parent_dev,
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"dprc_get_obj_region() failed: %d\n", error);
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goto error_cleanup_regions;
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}
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WARN_ON(region_desc.base_paddr == 0x0);
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WARN_ON(region_desc.size == 0);
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error = translate_mc_addr(region_desc.base_paddr,
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®ions[i].start);
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if (error < 0) {
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dev_err(parent_dev,
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"Invalid MC address: %#llx\n",
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region_desc.base_paddr);
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goto error_cleanup_regions;
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}
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regions[i].end = regions[i].start + region_desc.size - 1;
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regions[i].name = "fsl-mc object MMIO region";
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regions[i].flags = IORESOURCE_IO;
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}
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mc_dev->regions = regions;
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return 0;
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error_cleanup_regions:
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kfree(regions);
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return error;
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}
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/**
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* Add a newly discovered MC object device to be visible in Linux
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*/
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int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
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struct fsl_mc_io *mc_io,
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struct device *parent_dev,
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struct fsl_mc_device **new_mc_dev)
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{
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int error;
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struct fsl_mc_device *mc_dev = NULL;
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struct fsl_mc_bus *mc_bus = NULL;
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struct fsl_mc_device *parent_mc_dev;
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if (parent_dev->bus == &fsl_mc_bus_type)
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parent_mc_dev = to_fsl_mc_device(parent_dev);
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else
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parent_mc_dev = NULL;
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|
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if (strcmp(obj_desc->type, "dprc") == 0) {
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/*
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* Allocate an MC bus device object:
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*/
|
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mc_bus = devm_kzalloc(parent_dev, sizeof(*mc_bus), GFP_KERNEL);
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if (!mc_bus)
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return -ENOMEM;
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mc_dev = &mc_bus->mc_dev;
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} else {
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/*
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* Allocate a regular fsl_mc_device object:
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*/
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mc_dev = kmem_cache_zalloc(mc_dev_cache, GFP_KERNEL);
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if (!mc_dev)
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return -ENOMEM;
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}
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mc_dev->obj_desc = *obj_desc;
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mc_dev->mc_io = mc_io;
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device_initialize(&mc_dev->dev);
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mc_dev->dev.parent = parent_dev;
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mc_dev->dev.bus = &fsl_mc_bus_type;
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dev_set_name(&mc_dev->dev, "%s.%x", obj_desc->type, obj_desc->id);
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if (strcmp(obj_desc->type, "dprc") == 0) {
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struct fsl_mc_io *mc_io2;
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|
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mc_dev->flags |= FSL_MC_IS_DPRC;
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|
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/*
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* To get the DPRC's ICID, we need to open the DPRC
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* in get_dprc_icid(). For child DPRCs, we do so using the
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* parent DPRC's MC portal instead of the child DPRC's MC
|
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* portal, in case the child DPRC is already opened with
|
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* its own portal (e.g., the DPRC used by AIOP).
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*
|
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* NOTE: There cannot be more than one active open for a
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* given MC object, using the same MC portal.
|
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*/
|
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if (parent_mc_dev) {
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/*
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* device being added is a child DPRC device
|
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*/
|
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mc_io2 = parent_mc_dev->mc_io;
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} else {
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/*
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* device being added is the root DPRC device
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*/
|
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if (WARN_ON(!mc_io)) {
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error = -EINVAL;
|
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goto error_cleanup_dev;
|
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}
|
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mc_io2 = mc_io;
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|
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if (!fsl_mc_bus_type.dev_root)
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fsl_mc_bus_type.dev_root = &mc_dev->dev;
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}
|
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|
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error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid);
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if (error < 0)
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goto error_cleanup_dev;
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} else {
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/*
|
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* A non-DPRC MC object device has to be a child of another
|
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* MC object (specifically a DPRC object)
|
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*/
|
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mc_dev->icid = parent_mc_dev->icid;
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mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK;
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mc_dev->dev.dma_mask = &mc_dev->dma_mask;
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}
|
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|
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/*
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* Get MMIO regions for the device from the MC:
|
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*
|
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* NOTE: the root DPRC is a special case as its MMIO region is
|
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* obtained from the device tree
|
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*/
|
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if (parent_mc_dev && obj_desc->region_count != 0) {
|
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error = fsl_mc_device_get_mmio_regions(mc_dev,
|
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parent_mc_dev);
|
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if (error < 0)
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goto error_cleanup_dev;
|
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}
|
|
|
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/*
|
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* The device-specific probe callback will get invoked by device_add()
|
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*/
|
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error = device_add(&mc_dev->dev);
|
|
if (error < 0) {
|
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dev_err(parent_dev,
|
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"device_add() failed for device %s: %d\n",
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dev_name(&mc_dev->dev), error);
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goto error_cleanup_dev;
|
|
}
|
|
|
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(void)get_device(&mc_dev->dev);
|
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dev_dbg(parent_dev, "Added MC object device %s\n",
|
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dev_name(&mc_dev->dev));
|
|
|
|
*new_mc_dev = mc_dev;
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|
return 0;
|
|
|
|
error_cleanup_dev:
|
|
kfree(mc_dev->regions);
|
|
if (mc_bus)
|
|
devm_kfree(parent_dev, mc_bus);
|
|
else
|
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kmem_cache_free(mc_dev_cache, mc_dev);
|
|
|
|
return error;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fsl_mc_device_add);
|
|
|
|
/**
|
|
* fsl_mc_device_remove - Remove a MC object device from being visible to
|
|
* Linux
|
|
*
|
|
* @mc_dev: Pointer to a MC object device object
|
|
*/
|
|
void fsl_mc_device_remove(struct fsl_mc_device *mc_dev)
|
|
{
|
|
struct fsl_mc_bus *mc_bus = NULL;
|
|
|
|
kfree(mc_dev->regions);
|
|
|
|
/*
|
|
* The device-specific remove callback will get invoked by device_del()
|
|
*/
|
|
device_del(&mc_dev->dev);
|
|
put_device(&mc_dev->dev);
|
|
|
|
if (strcmp(mc_dev->obj_desc.type, "dprc") == 0) {
|
|
struct fsl_mc_io *mc_io = mc_dev->mc_io;
|
|
|
|
mc_bus = to_fsl_mc_bus(mc_dev);
|
|
fsl_destroy_mc_io(mc_io);
|
|
if (&mc_dev->dev == fsl_mc_bus_type.dev_root)
|
|
fsl_mc_bus_type.dev_root = NULL;
|
|
}
|
|
|
|
mc_dev->mc_io = NULL;
|
|
if (mc_bus)
|
|
devm_kfree(mc_dev->dev.parent, mc_bus);
|
|
else
|
|
kmem_cache_free(mc_dev_cache, mc_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,
|
|
uint8_t *num_ranges)
|
|
{
|
|
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);
|
|
|
|
*num_ranges = 0;
|
|
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;
|
|
}
|
|
|
|
*num_ranges = ranges_len / tuple_len;
|
|
return 0;
|
|
}
|
|
|
|
static int get_mc_addr_translation_ranges(struct device *dev,
|
|
struct fsl_mc_addr_translation_range
|
|
**ranges,
|
|
uint8_t *num_ranges)
|
|
{
|
|
int error;
|
|
int paddr_cells;
|
|
int mc_addr_cells;
|
|
int mc_size_cells;
|
|
int i;
|
|
const __be32 *ranges_start;
|
|
const __be32 *cell;
|
|
|
|
error = parse_mc_ranges(dev,
|
|
&paddr_cells,
|
|
&mc_addr_cells,
|
|
&mc_size_cells,
|
|
&ranges_start,
|
|
num_ranges);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
if (!(*num_ranges)) {
|
|
/*
|
|
* 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->start_mc_addr = of_read_number(cell, mc_addr_cells);
|
|
cell += mc_addr_cells;
|
|
range->start_phys_addr = of_read_number(cell, paddr_cells);
|
|
cell += paddr_cells;
|
|
range->end_mc_addr = range->start_mc_addr +
|
|
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 dprc_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;
|
|
uint32_t mc_portal_size;
|
|
struct mc_version mc_version;
|
|
struct resource res;
|
|
|
|
dev_info(&pdev->dev, "Root MC bus device probed");
|
|
|
|
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 %s\n",
|
|
pdev->dev.of_node->full_name);
|
|
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, 0, &mc_io);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
error = mc_get_version(mc_io, &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,
|
|
"Freescale Management Complex Firmware version: %u.%u.%u\n",
|
|
mc_version.major, mc_version.minor, mc_version.revision);
|
|
|
|
if (mc_version.major < MC_VER_MAJOR) {
|
|
dev_err(&pdev->dev,
|
|
"ERROR: MC firmware version not supported by driver (driver version: %u.%u)\n",
|
|
MC_VER_MAJOR, MC_VER_MINOR);
|
|
error = -ENOTSUPP;
|
|
goto error_cleanup_mc_io;
|
|
}
|
|
|
|
if (mc_version.major > MC_VER_MAJOR) {
|
|
dev_warn(&pdev->dev,
|
|
"WARNING: driver may not support newer MC firmware features (driver version: %u.%u)\n",
|
|
MC_VER_MAJOR, MC_VER_MINOR);
|
|
}
|
|
|
|
error = get_mc_addr_translation_ranges(&pdev->dev,
|
|
&mc->translation_ranges,
|
|
&mc->num_translation_ranges);
|
|
if (error < 0)
|
|
goto error_cleanup_mc_io;
|
|
|
|
error = dpmng_get_container_id(mc_io, &container_id);
|
|
if (error < 0) {
|
|
dev_err(&pdev->dev,
|
|
"dpmng_get_container_id() failed: %d\n", error);
|
|
goto error_cleanup_mc_io;
|
|
}
|
|
|
|
obj_desc.vendor = FSL_MC_VENDOR_FREESCALE;
|
|
strcpy(obj_desc.type, "dprc");
|
|
obj_desc.id = container_id;
|
|
obj_desc.ver_major = DPRC_VER_MAJOR;
|
|
obj_desc.ver_minor = DPRC_VER_MINOR;
|
|
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 (WARN_ON(&mc->root_mc_bus_dev->dev != fsl_mc_bus_type.dev_root))
|
|
return -EINVAL;
|
|
|
|
fsl_mc_device_remove(mc->root_mc_bus_dev);
|
|
dev_info(&pdev->dev, "Root MC bus device removed");
|
|
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",
|
|
.owner = THIS_MODULE,
|
|
.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;
|
|
|
|
mc_dev_cache = kmem_cache_create("fsl_mc_device",
|
|
sizeof(struct fsl_mc_device), 0, 0,
|
|
NULL);
|
|
if (!mc_dev_cache) {
|
|
pr_err("Could not create fsl_mc_device cache\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
error = bus_register(&fsl_mc_bus_type);
|
|
if (error < 0) {
|
|
pr_err("fsl-mc bus type registration failed: %d\n", error);
|
|
goto error_cleanup_cache;
|
|
}
|
|
|
|
pr_info("fsl-mc bus type registered\n");
|
|
|
|
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;
|
|
|
|
return 0;
|
|
|
|
error_cleanup_driver:
|
|
platform_driver_unregister(&fsl_mc_bus_driver);
|
|
|
|
error_cleanup_bus:
|
|
bus_unregister(&fsl_mc_bus_type);
|
|
|
|
error_cleanup_cache:
|
|
kmem_cache_destroy(mc_dev_cache);
|
|
return error;
|
|
}
|
|
|
|
postcore_initcall(fsl_mc_bus_driver_init);
|
|
|
|
static void __exit fsl_mc_bus_driver_exit(void)
|
|
{
|
|
if (WARN_ON(!mc_dev_cache))
|
|
return;
|
|
|
|
dprc_driver_exit();
|
|
platform_driver_unregister(&fsl_mc_bus_driver);
|
|
bus_unregister(&fsl_mc_bus_type);
|
|
kmem_cache_destroy(mc_dev_cache);
|
|
pr_info("MC bus unregistered\n");
|
|
}
|
|
|
|
module_exit(fsl_mc_bus_driver_exit);
|
|
|
|
MODULE_AUTHOR("Freescale Semiconductor Inc.");
|
|
MODULE_DESCRIPTION("Freescale Management Complex (MC) bus driver");
|
|
MODULE_LICENSE("GPL");
|