staging: fsl-mc: Freescale Management Complex (fsl-mc) bus driver
Platform device driver that sets up the basic bus infrastructure for the fsl-mc bus type, including support for adding/removing fsl-mc devices, register/unregister of fsl-mc drivers, and bus match support to bind devices to drivers. Signed-off-by: J. German Rivera <German.Rivera@freescale.com> Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
J. German Rivera
Greg Kroah-Hartman
parent
31c889653c
commit
bbf9d17d98
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@ -110,4 +110,6 @@ source "drivers/staging/fbtft/Kconfig"
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source "drivers/staging/i2o/Kconfig"
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source "drivers/staging/fsl-mc/Kconfig"
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endif # STAGING
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@ -47,3 +47,4 @@ obj-$(CONFIG_UNISYSSPAR) += unisys/
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obj-$(CONFIG_COMMON_CLK_XLNX_CLKWZRD) += clocking-wizard/
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obj-$(CONFIG_FB_TFT) += fbtft/
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obj-$(CONFIG_I2O) += i2o/
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obj-$(CONFIG_FSL_MC_BUS) += fsl-mc/
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@ -0,0 +1 @@
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source "drivers/staging/fsl-mc/bus/Kconfig"
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@ -0,0 +1,2 @@
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# Freescale Management Complex (MC) bus drivers
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obj-$(CONFIG_FSL_MC_BUS) += bus/
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@ -0,0 +1,24 @@
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#
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# Freescale Management Complex (MC) bus drivers
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#
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# Copyright (C) 2014 Freescale Semiconductor, Inc.
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#
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# This file is released under the GPLv2
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#
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config FSL_MC_BUS
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tristate "Freescale Management Complex (MC) bus driver"
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depends on OF && ARM64
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help
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Driver to enable the bus infrastructure for the Freescale
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QorIQ Management Complex (fsl-mc). The fsl-mc is a hardware
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module of the QorIQ LS2 SoCs, that does resource management
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for hardware building-blocks in the SoC that can be used
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to dynamically create networking hardware objects such as
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network interfaces (NICs), crypto accelerator instances,
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or L2 switches.
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Only enable this option when building the kernel for
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Freescale QorQIQ LS2xxxx SoCs.
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@ -0,0 +1,14 @@
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#
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# Freescale Management Complex (MC) bus drivers
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#
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# Copyright (C) 2014 Freescale Semiconductor, Inc.
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#
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# This file is released under the GPLv2
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#
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obj-$(CONFIG_FSL_MC_BUS) += mc-bus-driver.o
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mc-bus-driver-objs := mc-bus.o \
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mc-sys.o \
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dprc.o \
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dpmng.o
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@ -0,0 +1,755 @@
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/*
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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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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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|
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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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|
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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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mc_dev->flags |= FSL_MC_IS_DPRC;
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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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|
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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;
|
||||
} else {
|
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/*
|
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* A non-DPRC MC object device has to be a child of another
|
||||
* 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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* Get MMIO regions for the device from the MC:
|
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*
|
||||
* NOTE: the root DPRC is a special case as its MMIO region is
|
||||
* obtained from the device tree
|
||||
*/
|
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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,
|
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"device_add() failed for device %s: %d\n",
|
||||
dev_name(&mc_dev->dev), error);
|
||||
goto error_cleanup_dev;
|
||||
}
|
||||
|
||||
(void)get_device(&mc_dev->dev);
|
||||
dev_dbg(parent_dev, "Added MC object device %s\n",
|
||||
dev_name(&mc_dev->dev));
|
||||
|
||||
*new_mc_dev = mc_dev;
|
||||
return 0;
|
||||
|
||||
error_cleanup_dev:
|
||||
kfree(mc_dev->regions);
|
||||
if (mc_bus)
|
||||
devm_kfree(parent_dev, mc_bus);
|
||||
else
|
||||
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, 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;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
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;
|
||||
|
||||
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");
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
/*
|
||||
* Freescale Management Complex (MC) bus private declarations
|
||||
*
|
||||
* Copyright (C) 2014 Freescale Semiconductor, Inc.
|
||||
* Author: German Rivera <German.Rivera@freescale.com>
|
||||
*
|
||||
* This file is licensed under the terms of the GNU General Public
|
||||
* License version 2. This program is licensed "as is" without any
|
||||
* warranty of any kind, whether express or implied.
|
||||
*/
|
||||
#ifndef _FSL_MC_PRIVATE_H_
|
||||
#define _FSL_MC_PRIVATE_H_
|
||||
|
||||
#include "../include/mc.h"
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/stringify.h>
|
||||
|
||||
#define FSL_MC_DEVICE_MATCH(_mc_dev, _obj_desc) \
|
||||
(strcmp((_mc_dev)->obj_desc.type, (_obj_desc)->type) == 0 && \
|
||||
(_mc_dev)->obj_desc.id == (_obj_desc)->id)
|
||||
|
||||
/**
|
||||
* struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
|
||||
* @root_mc_bus_dev: MC object device representing the root DPRC
|
||||
* @addr_translation_ranges: array of bus to system address translation ranges
|
||||
*/
|
||||
struct fsl_mc {
|
||||
struct fsl_mc_device *root_mc_bus_dev;
|
||||
uint8_t num_translation_ranges;
|
||||
struct fsl_mc_addr_translation_range *translation_ranges;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct fsl_mc_bus - logical bus that corresponds to a physical DPRC
|
||||
* @mc_dev: fsl-mc device for the bus device itself.
|
||||
* @scan_mutex: Serializes bus scanning
|
||||
*/
|
||||
struct fsl_mc_bus {
|
||||
struct fsl_mc_device mc_dev;
|
||||
struct mutex scan_mutex; /* serializes bus scanning */
|
||||
};
|
||||
|
||||
#define to_fsl_mc_bus(_mc_dev) \
|
||||
container_of(_mc_dev, struct fsl_mc_bus, mc_dev)
|
||||
|
||||
/**
|
||||
* struct fsl_mc_addr_translation_range - bus to system address translation
|
||||
* range
|
||||
* @start_mc_addr: Start MC address of the range being translated
|
||||
* @end_mc_addr: MC address of the first byte after the range (last MC
|
||||
* address of the range is end_mc_addr - 1)
|
||||
* @start_phys_addr: system physical address corresponding to start_mc_addr
|
||||
*/
|
||||
struct fsl_mc_addr_translation_range {
|
||||
uint64_t start_mc_addr;
|
||||
uint64_t end_mc_addr;
|
||||
phys_addr_t start_phys_addr;
|
||||
};
|
||||
|
||||
int __must_check fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
|
||||
struct fsl_mc_io *mc_io,
|
||||
struct device *parent_dev,
|
||||
struct fsl_mc_device **new_mc_dev);
|
||||
|
||||
void fsl_mc_device_remove(struct fsl_mc_device *mc_dev);
|
||||
|
||||
#endif /* _FSL_MC_PRIVATE_H_ */
|
||||
|
|
@ -0,0 +1,136 @@
|
|||
/*
|
||||
* Freescale Management Complex (MC) bus public interface
|
||||
*
|
||||
* Copyright (C) 2014 Freescale Semiconductor, Inc.
|
||||
* Author: German Rivera <German.Rivera@freescale.com>
|
||||
*
|
||||
* This file is licensed under the terms of the GNU General Public
|
||||
* License version 2. This program is licensed "as is" without any
|
||||
* warranty of any kind, whether express or implied.
|
||||
*/
|
||||
#ifndef _FSL_MC_H_
|
||||
#define _FSL_MC_H_
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/mod_devicetable.h>
|
||||
#include <linux/list.h>
|
||||
#include "../include/dprc.h"
|
||||
|
||||
#define FSL_MC_VENDOR_FREESCALE 0x1957
|
||||
|
||||
struct fsl_mc_device;
|
||||
struct fsl_mc_io;
|
||||
|
||||
/**
|
||||
* struct fsl_mc_driver - MC object device driver object
|
||||
* @driver: Generic device driver
|
||||
* @match_id_table: table of supported device matching Ids
|
||||
* @probe: Function called when a device is added
|
||||
* @remove: Function called when a device is removed
|
||||
* @shutdown: Function called at shutdown time to quiesce the device
|
||||
* @suspend: Function called when a device is stopped
|
||||
* @resume: Function called when a device is resumed
|
||||
*
|
||||
* Generic DPAA device driver object for device drivers that are registered
|
||||
* with a DPRC bus. This structure is to be embedded in each device-specific
|
||||
* driver structure.
|
||||
*/
|
||||
struct fsl_mc_driver {
|
||||
struct device_driver driver;
|
||||
const struct fsl_mc_device_match_id *match_id_table;
|
||||
int (*probe)(struct fsl_mc_device *dev);
|
||||
int (*remove)(struct fsl_mc_device *dev);
|
||||
void (*shutdown)(struct fsl_mc_device *dev);
|
||||
int (*suspend)(struct fsl_mc_device *dev, pm_message_t state);
|
||||
int (*resume)(struct fsl_mc_device *dev);
|
||||
};
|
||||
|
||||
#define to_fsl_mc_driver(_drv) \
|
||||
container_of(_drv, struct fsl_mc_driver, driver)
|
||||
|
||||
/**
|
||||
* struct fsl_mc_device_match_id - MC object device Id entry for driver matching
|
||||
* @vendor: vendor ID
|
||||
* @obj_type: MC object type
|
||||
* @ver_major: MC object version major number
|
||||
* @ver_minor: MC object version minor number
|
||||
*
|
||||
* Type of entries in the "device Id" table for MC object devices supported by
|
||||
* a MC object device driver. The last entry of the table has vendor set to 0x0
|
||||
*/
|
||||
struct fsl_mc_device_match_id {
|
||||
uint16_t vendor;
|
||||
const char obj_type[16];
|
||||
uint32_t ver_major;
|
||||
uint32_t ver_minor;
|
||||
};
|
||||
|
||||
/**
|
||||
* Bit masks for a MC object device (struct fsl_mc_device) flags
|
||||
*/
|
||||
#define FSL_MC_IS_DPRC 0x0001
|
||||
|
||||
/**
|
||||
* Default DMA mask for devices on a fsl-mc bus
|
||||
*/
|
||||
#define FSL_MC_DEFAULT_DMA_MASK (~0ULL)
|
||||
|
||||
/**
|
||||
* struct fsl_mc_device - MC object device object
|
||||
* @dev: Linux driver model device object
|
||||
* @dma_mask: Default DMA mask
|
||||
* @flags: MC object device flags
|
||||
* @icid: Isolation context ID for the device
|
||||
* @mc_handle: MC handle for the corresponding MC object opened
|
||||
* @mc_io: Pointer to MC IO object assigned to this device or
|
||||
* NULL if none.
|
||||
* @obj_desc: MC description of the DPAA device
|
||||
* @regions: pointer to array of MMIO region entries
|
||||
*
|
||||
* Generic device object for MC object devices that are "attached" to a
|
||||
* MC bus.
|
||||
*
|
||||
* NOTES:
|
||||
* - For a non-DPRC object its icid is the same as its parent DPRC's icid.
|
||||
* - The SMMU notifier callback gets invoked after device_add() has been
|
||||
* called for an MC object device, but before the device-specific probe
|
||||
* callback gets called.
|
||||
*/
|
||||
struct fsl_mc_device {
|
||||
struct device dev;
|
||||
uint64_t dma_mask;
|
||||
uint16_t flags;
|
||||
uint16_t icid;
|
||||
uint16_t mc_handle;
|
||||
struct fsl_mc_io *mc_io;
|
||||
struct dprc_obj_desc obj_desc;
|
||||
struct resource *regions;
|
||||
};
|
||||
|
||||
#define to_fsl_mc_device(_dev) \
|
||||
container_of(_dev, struct fsl_mc_device, dev)
|
||||
|
||||
/*
|
||||
* module_fsl_mc_driver() - Helper macro for drivers that don't do
|
||||
* anything special in module init/exit. This eliminates a lot of
|
||||
* boilerplate. Each module may only use this macro once, and
|
||||
* calling it replaces module_init() and module_exit()
|
||||
*/
|
||||
#define module_fsl_mc_driver(__fsl_mc_driver) \
|
||||
module_driver(__fsl_mc_driver, fsl_mc_driver_register, \
|
||||
fsl_mc_driver_unregister)
|
||||
|
||||
/*
|
||||
* Macro to avoid include chaining to get THIS_MODULE
|
||||
*/
|
||||
#define fsl_mc_driver_register(drv) \
|
||||
__fsl_mc_driver_register(drv, THIS_MODULE)
|
||||
|
||||
int __must_check __fsl_mc_driver_register(struct fsl_mc_driver *fsl_mc_driver,
|
||||
struct module *owner);
|
||||
|
||||
void fsl_mc_driver_unregister(struct fsl_mc_driver *driver);
|
||||
|
||||
extern struct bus_type fsl_mc_bus_type;
|
||||
|
||||
#endif /* _FSL_MC_H_ */
|
||||
Loading…
Reference in New Issue