1 files changed, 0 insertions, 648 deletions

diff --git a/drivers/staging/fsl-mc/bus/fsl-mc-allocator.c b/drivers/staging/fsl-mc/bus/fsl-mc-allocator.c
deleted file mode 100644
index 8f313a41240b..000000000000
--- a/drivers/staging/fsl-mc/bus/fsl-mc-allocator.c
+++ /dev/null
@@ -1,648 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * fsl-mc object allocator driver
- *
- * Copyright (C) 2013-2016 Freescale Semiconductor, Inc.
- *
- */
-
-#include <linux/module.h>
-#include <linux/msi.h>
-#include "../include/mc.h"
-
-#include "fsl-mc-private.h"
-
-static bool __must_check fsl_mc_is_allocatable(struct fsl_mc_device *mc_dev)
-{
-	return is_fsl_mc_bus_dpbp(mc_dev) ||
-	       is_fsl_mc_bus_dpmcp(mc_dev) ||
-	       is_fsl_mc_bus_dpcon(mc_dev);
-}
-
-/**
- * fsl_mc_resource_pool_add_device - add allocatable object to a resource
- * pool of a given fsl-mc bus
- *
- * @mc_bus: pointer to the fsl-mc bus
- * @pool_type: pool type
- * @mc_dev: pointer to allocatable fsl-mc device
- */
-static int __must_check fsl_mc_resource_pool_add_device(struct fsl_mc_bus
-								*mc_bus,
-							enum fsl_mc_pool_type
-								pool_type,
-							struct fsl_mc_device
-								*mc_dev)
-{
-	struct fsl_mc_resource_pool *res_pool;
-	struct fsl_mc_resource *resource;
-	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
-	int error = -EINVAL;
-
-	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
-		goto out;
-	if (!fsl_mc_is_allocatable(mc_dev))
-		goto out;
-	if (mc_dev->resource)
-		goto out;
-
-	res_pool = &mc_bus->resource_pools[pool_type];
-	if (res_pool->type != pool_type)
-		goto out;
-	if (res_pool->mc_bus != mc_bus)
-		goto out;
-
-	mutex_lock(&res_pool->mutex);
-
-	if (res_pool->max_count < 0)
-		goto out_unlock;
-	if (res_pool->free_count < 0 ||
-	    res_pool->free_count > res_pool->max_count)
-		goto out_unlock;
-
-	resource = devm_kzalloc(&mc_bus_dev->dev, sizeof(*resource),
-				GFP_KERNEL);
-	if (!resource) {
-		error = -ENOMEM;
-		dev_err(&mc_bus_dev->dev,
-			"Failed to allocate memory for fsl_mc_resource\n");
-		goto out_unlock;
-	}
-
-	resource->type = pool_type;
-	resource->id = mc_dev->obj_desc.id;
-	resource->data = mc_dev;
-	resource->parent_pool = res_pool;
-	INIT_LIST_HEAD(&resource->node);
-	list_add_tail(&resource->node, &res_pool->free_list);
-	mc_dev->resource = resource;
-	res_pool->free_count++;
-	res_pool->max_count++;
-	error = 0;
-out_unlock:
-	mutex_unlock(&res_pool->mutex);
-out:
-	return error;
-}
-
-/**
- * fsl_mc_resource_pool_remove_device - remove an allocatable device from a
- * resource pool
- *
- * @mc_dev: pointer to allocatable fsl-mc device
- *
- * It permanently removes an allocatable fsl-mc device from the resource
- * pool. It's an error if the device is in use.
- */
-static int __must_check fsl_mc_resource_pool_remove_device(struct fsl_mc_device
-								   *mc_dev)
-{
-	struct fsl_mc_device *mc_bus_dev;
-	struct fsl_mc_bus *mc_bus;
-	struct fsl_mc_resource_pool *res_pool;
-	struct fsl_mc_resource *resource;
-	int error = -EINVAL;
-
-	if (!fsl_mc_is_allocatable(mc_dev))
-		goto out;
-
-	resource = mc_dev->resource;
-	if (!resource || resource->data != mc_dev)
-		goto out;
-
-	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
-	mc_bus = to_fsl_mc_bus(mc_bus_dev);
-	res_pool = resource->parent_pool;
-	if (res_pool != &mc_bus->resource_pools[resource->type])
-		goto out;
-
-	mutex_lock(&res_pool->mutex);
-
-	if (res_pool->max_count <= 0)
-		goto out_unlock;
-	if (res_pool->free_count <= 0 ||
-	    res_pool->free_count > res_pool->max_count)
-		goto out_unlock;
-
-	/*
-	 * If the device is currently allocated, its resource is not
-	 * in the free list and thus, the device cannot be removed.
-	 */
-	if (list_empty(&resource->node)) {
-		error = -EBUSY;
-		dev_err(&mc_bus_dev->dev,
-			"Device %s cannot be removed from resource pool\n",
-			dev_name(&mc_dev->dev));
-		goto out_unlock;
-	}
-
-	list_del_init(&resource->node);
-	res_pool->free_count--;
-	res_pool->max_count--;
-
-	devm_kfree(&mc_bus_dev->dev, resource);
-	mc_dev->resource = NULL;
-	error = 0;
-out_unlock:
-	mutex_unlock(&res_pool->mutex);
-out:
-	return error;
-}
-
-static const char *const fsl_mc_pool_type_strings[] = {
-	[FSL_MC_POOL_DPMCP] = "dpmcp",
-	[FSL_MC_POOL_DPBP] = "dpbp",
-	[FSL_MC_POOL_DPCON] = "dpcon",
-	[FSL_MC_POOL_IRQ] = "irq",
-};
-
-static int __must_check object_type_to_pool_type(const char *object_type,
-						 enum fsl_mc_pool_type
-								*pool_type)
-{
-	unsigned int i;
-
-	for (i = 0; i < ARRAY_SIZE(fsl_mc_pool_type_strings); i++) {
-		if (strcmp(object_type, fsl_mc_pool_type_strings[i]) == 0) {
-			*pool_type = i;
-			return 0;
-		}
-	}
-
-	return -EINVAL;
-}
-
-int __must_check fsl_mc_resource_allocate(struct fsl_mc_bus *mc_bus,
-					  enum fsl_mc_pool_type pool_type,
-					  struct fsl_mc_resource **new_resource)
-{
-	struct fsl_mc_resource_pool *res_pool;
-	struct fsl_mc_resource *resource;
-	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
-	int error = -EINVAL;
-
-	BUILD_BUG_ON(ARRAY_SIZE(fsl_mc_pool_type_strings) !=
-		     FSL_MC_NUM_POOL_TYPES);
-
-	*new_resource = NULL;
-	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
-		goto out;
-
-	res_pool = &mc_bus->resource_pools[pool_type];
-	if (res_pool->mc_bus != mc_bus)
-		goto out;
-
-	mutex_lock(&res_pool->mutex);
-	resource = list_first_entry_or_null(&res_pool->free_list,
-					    struct fsl_mc_resource, node);
-
-	if (!resource) {
-		error = -ENXIO;
-		dev_err(&mc_bus_dev->dev,
-			"No more resources of type %s left\n",
-			fsl_mc_pool_type_strings[pool_type]);
-		goto out_unlock;
-	}
-
-	if (resource->type != pool_type)
-		goto out_unlock;
-	if (resource->parent_pool != res_pool)
-		goto out_unlock;
-	if (res_pool->free_count <= 0 ||
-	    res_pool->free_count > res_pool->max_count)
-		goto out_unlock;
-
-	list_del_init(&resource->node);
-
-	res_pool->free_count--;
-	error = 0;
-out_unlock:
-	mutex_unlock(&res_pool->mutex);
-	*new_resource = resource;
-out:
-	return error;
-}
-EXPORT_SYMBOL_GPL(fsl_mc_resource_allocate);
-
-void fsl_mc_resource_free(struct fsl_mc_resource *resource)
-{
-	struct fsl_mc_resource_pool *res_pool;
-
-	res_pool = resource->parent_pool;
-	if (resource->type != res_pool->type)
-		return;
-
-	mutex_lock(&res_pool->mutex);
-	if (res_pool->free_count < 0 ||
-	    res_pool->free_count >= res_pool->max_count)
-		goto out_unlock;
-
-	if (!list_empty(&resource->node))
-		goto out_unlock;
-
-	list_add_tail(&resource->node, &res_pool->free_list);
-	res_pool->free_count++;
-out_unlock:
-	mutex_unlock(&res_pool->mutex);
-}
-EXPORT_SYMBOL_GPL(fsl_mc_resource_free);
-
-/**
- * fsl_mc_object_allocate - Allocates an fsl-mc object of the given
- * pool type from a given fsl-mc bus instance
- *
- * @mc_dev: fsl-mc device which is used in conjunction with the
- * allocated object
- * @pool_type: pool type
- * @new_mc_dev: pointer to area where the pointer to the allocated device
- * is to be returned
- *
- * Allocatable objects are always used in conjunction with some functional
- * device.  This function allocates an object of the specified type from
- * the DPRC containing the functional device.
- *
- * NOTE: pool_type must be different from FSL_MC_POOL_MCP, since MC
- * portals are allocated using fsl_mc_portal_allocate(), instead of
- * this function.
- */
-int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
-					enum fsl_mc_pool_type pool_type,
-					struct fsl_mc_device **new_mc_adev)
-{
-	struct fsl_mc_device *mc_bus_dev;
-	struct fsl_mc_bus *mc_bus;
-	struct fsl_mc_device *mc_adev;
-	int error = -EINVAL;
-	struct fsl_mc_resource *resource = NULL;
-
-	*new_mc_adev = NULL;
-	if (mc_dev->flags & FSL_MC_IS_DPRC)
-		goto error;
-
-	if (!dev_is_fsl_mc(mc_dev->dev.parent))
-		goto error;
-
-	if (pool_type == FSL_MC_POOL_DPMCP)
-		goto error;
-
-	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
-	mc_bus = to_fsl_mc_bus(mc_bus_dev);
-	error = fsl_mc_resource_allocate(mc_bus, pool_type, &resource);
-	if (error < 0)
-		goto error;
-
-	mc_adev = resource->data;
-	if (!mc_adev)
-		goto error;
-
-	*new_mc_adev = mc_adev;
-	return 0;
-error:
-	if (resource)
-		fsl_mc_resource_free(resource);
-
-	return error;
-}
-EXPORT_SYMBOL_GPL(fsl_mc_object_allocate);
-
-/**
- * fsl_mc_object_free - Returns an fsl-mc object to the resource
- * pool where it came from.
- * @mc_adev: Pointer to the fsl-mc device
- */
-void fsl_mc_object_free(struct fsl_mc_device *mc_adev)
-{
-	struct fsl_mc_resource *resource;
-
-	resource = mc_adev->resource;
-	if (resource->type == FSL_MC_POOL_DPMCP)
-		return;
-	if (resource->data != mc_adev)
-		return;
-
-	fsl_mc_resource_free(resource);
-}
-EXPORT_SYMBOL_GPL(fsl_mc_object_free);
-
-/*
- * A DPRC and the devices in the DPRC all share the same GIC-ITS device
- * ID.  A block of IRQs is pre-allocated and maintained in a pool
- * from which devices can allocate them when needed.
- */
-
-/*
- * Initialize the interrupt pool associated with an fsl-mc bus.
- * It allocates a block of IRQs from the GIC-ITS.
- */
-int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
-			     unsigned int irq_count)
-{
-	unsigned int i;
-	struct msi_desc *msi_desc;
-	struct fsl_mc_device_irq *irq_resources;
-	struct fsl_mc_device_irq *mc_dev_irq;
-	int error;
-	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
-	struct fsl_mc_resource_pool *res_pool =
-			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
-
-	if (irq_count == 0 ||
-	    irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS)
-		return -EINVAL;
-
-	error = fsl_mc_msi_domain_alloc_irqs(&mc_bus_dev->dev, irq_count);
-	if (error < 0)
-		return error;
-
-	irq_resources = devm_kzalloc(&mc_bus_dev->dev,
-				     sizeof(*irq_resources) * irq_count,
-				     GFP_KERNEL);
-	if (!irq_resources) {
-		error = -ENOMEM;
-		goto cleanup_msi_irqs;
-	}
-
-	for (i = 0; i < irq_count; i++) {
-		mc_dev_irq = &irq_resources[i];
-
-		/*
-		 * NOTE: This mc_dev_irq's MSI addr/value pair will be set
-		 * by the fsl_mc_msi_write_msg() callback
-		 */
-		mc_dev_irq->resource.type = res_pool->type;
-		mc_dev_irq->resource.data = mc_dev_irq;
-		mc_dev_irq->resource.parent_pool = res_pool;
-		INIT_LIST_HEAD(&mc_dev_irq->resource.node);
-		list_add_tail(&mc_dev_irq->resource.node, &res_pool->free_list);
-	}
-
-	for_each_msi_entry(msi_desc, &mc_bus_dev->dev) {
-		mc_dev_irq = &irq_resources[msi_desc->fsl_mc.msi_index];
-		mc_dev_irq->msi_desc = msi_desc;
-		mc_dev_irq->resource.id = msi_desc->irq;
-	}
-
-	res_pool->max_count = irq_count;
-	res_pool->free_count = irq_count;
-	mc_bus->irq_resources = irq_resources;
-	return 0;
-
-cleanup_msi_irqs:
-	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
-	return error;
-}
-EXPORT_SYMBOL_GPL(fsl_mc_populate_irq_pool);
-
-/**
- * Teardown the interrupt pool associated with an fsl-mc bus.
- * It frees the IRQs that were allocated to the pool, back to the GIC-ITS.
- */
-void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus)
-{
-	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
-	struct fsl_mc_resource_pool *res_pool =
-			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
-
-	if (!mc_bus->irq_resources)
-		return;
-
-	if (res_pool->max_count == 0)
-		return;
-
-	if (res_pool->free_count != res_pool->max_count)
-		return;
-
-	INIT_LIST_HEAD(&res_pool->free_list);
-	res_pool->max_count = 0;
-	res_pool->free_count = 0;
-	mc_bus->irq_resources = NULL;
-	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
-}
-EXPORT_SYMBOL_GPL(fsl_mc_cleanup_irq_pool);
-
-/**
- * Allocate the IRQs required by a given fsl-mc device.
- */
-int __must_check fsl_mc_allocate_irqs(struct fsl_mc_device *mc_dev)
-{
-	int i;
-	int irq_count;
-	int res_allocated_count = 0;
-	int error = -EINVAL;
-	struct fsl_mc_device_irq **irqs = NULL;
-	struct fsl_mc_bus *mc_bus;
-	struct fsl_mc_resource_pool *res_pool;
-
-	if (mc_dev->irqs)
-		return -EINVAL;
-
-	irq_count = mc_dev->obj_desc.irq_count;
-	if (irq_count == 0)
-		return -EINVAL;
-
-	if (is_fsl_mc_bus_dprc(mc_dev))
-		mc_bus = to_fsl_mc_bus(mc_dev);
-	else
-		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
-
-	if (!mc_bus->irq_resources)
-		return -EINVAL;
-
-	res_pool = &mc_bus->resource_pools[FSL_MC_POOL_IRQ];
-	if (res_pool->free_count < irq_count) {
-		dev_err(&mc_dev->dev,
-			"Not able to allocate %u irqs for device\n", irq_count);
-		return -ENOSPC;
-	}
-
-	irqs = devm_kzalloc(&mc_dev->dev, irq_count * sizeof(irqs[0]),
-			    GFP_KERNEL);
-	if (!irqs)
-		return -ENOMEM;
-
-	for (i = 0; i < irq_count; i++) {
-		struct fsl_mc_resource *resource;
-
-		error = fsl_mc_resource_allocate(mc_bus, FSL_MC_POOL_IRQ,
-						 &resource);
-		if (error < 0)
-			goto error_resource_alloc;
-
-		irqs[i] = to_fsl_mc_irq(resource);
-		res_allocated_count++;
-
-		irqs[i]->mc_dev = mc_dev;
-		irqs[i]->dev_irq_index = i;
-	}
-
-	mc_dev->irqs = irqs;
-	return 0;
-
-error_resource_alloc:
-	for (i = 0; i < res_allocated_count; i++) {
-		irqs[i]->mc_dev = NULL;
-		fsl_mc_resource_free(&irqs[i]->resource);
-	}
-
-	return error;
-}
-EXPORT_SYMBOL_GPL(fsl_mc_allocate_irqs);
-
-/*
- * Frees the IRQs that were allocated for an fsl-mc device.
- */
-void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev)
-{
-	int i;
-	int irq_count;
-	struct fsl_mc_bus *mc_bus;
-	struct fsl_mc_device_irq **irqs = mc_dev->irqs;
-
-	if (!irqs)
-		return;
-
-	irq_count = mc_dev->obj_desc.irq_count;
-
-	if (is_fsl_mc_bus_dprc(mc_dev))
-		mc_bus = to_fsl_mc_bus(mc_dev);
-	else
-		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
-
-	if (!mc_bus->irq_resources)
-		return;
-
-	for (i = 0; i < irq_count; i++) {
-		irqs[i]->mc_dev = NULL;
-		fsl_mc_resource_free(&irqs[i]->resource);
-	}
-
-	mc_dev->irqs = NULL;
-}
-EXPORT_SYMBOL_GPL(fsl_mc_free_irqs);
-
-void fsl_mc_init_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
-{
-	int pool_type;
-	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
-
-	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++) {
-		struct fsl_mc_resource_pool *res_pool =
-		    &mc_bus->resource_pools[pool_type];
-
-		res_pool->type = pool_type;
-		res_pool->max_count = 0;
-		res_pool->free_count = 0;
-		res_pool->mc_bus = mc_bus;
-		INIT_LIST_HEAD(&res_pool->free_list);
-		mutex_init(&res_pool->mutex);
-	}
-}
-
-static void fsl_mc_cleanup_resource_pool(struct fsl_mc_device *mc_bus_dev,
-					 enum fsl_mc_pool_type pool_type)
-{
-	struct fsl_mc_resource *resource;
-	struct fsl_mc_resource *next;
-	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
-	struct fsl_mc_resource_pool *res_pool =
-					&mc_bus->resource_pools[pool_type];
-	int free_count = 0;
-
-	list_for_each_entry_safe(resource, next, &res_pool->free_list, node) {
-		free_count++;
-		devm_kfree(&mc_bus_dev->dev, resource);
-	}
-}
-
-void fsl_mc_cleanup_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
-{
-	int pool_type;
-
-	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++)
-		fsl_mc_cleanup_resource_pool(mc_bus_dev, pool_type);
-}
-
-/**
- * fsl_mc_allocator_probe - callback invoked when an allocatable device is
- * being added to the system
- */
-static int fsl_mc_allocator_probe(struct fsl_mc_device *mc_dev)
-{
-	enum fsl_mc_pool_type pool_type;
-	struct fsl_mc_device *mc_bus_dev;
-	struct fsl_mc_bus *mc_bus;
-	int error;
-
-	if (!fsl_mc_is_allocatable(mc_dev))
-		return -EINVAL;
-
-	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
-	if (!dev_is_fsl_mc(&mc_bus_dev->dev))
-		return -EINVAL;
-
-	mc_bus = to_fsl_mc_bus(mc_bus_dev);
-	error = object_type_to_pool_type(mc_dev->obj_desc.type, &pool_type);
-	if (error < 0)
-		return error;
-
-	error = fsl_mc_resource_pool_add_device(mc_bus, pool_type, mc_dev);
-	if (error < 0)
-		return error;
-
-	dev_dbg(&mc_dev->dev,
-		"Allocatable fsl-mc device bound to fsl_mc_allocator driver");
-	return 0;
-}
-
-/**
- * fsl_mc_allocator_remove - callback invoked when an allocatable device is
- * being removed from the system
- */
-static int fsl_mc_allocator_remove(struct fsl_mc_device *mc_dev)
-{
-	int error;
-
-	if (!fsl_mc_is_allocatable(mc_dev))
-		return -EINVAL;
-
-	if (mc_dev->resource) {
-		error = fsl_mc_resource_pool_remove_device(mc_dev);
-		if (error < 0)
-			return error;
-	}
-
-	dev_dbg(&mc_dev->dev,
-		"Allocatable fsl-mc device unbound from fsl_mc_allocator driver");
-	return 0;
-}
-
-static const struct fsl_mc_device_id match_id_table[] = {
-	{
-	 .vendor = FSL_MC_VENDOR_FREESCALE,
-	 .obj_type = "dpbp",
-	},
-	{
-	 .vendor = FSL_MC_VENDOR_FREESCALE,
-	 .obj_type = "dpmcp",
-	},
-	{
-	 .vendor = FSL_MC_VENDOR_FREESCALE,
-	 .obj_type = "dpcon",
-	},
-	{.vendor = 0x0},
-};
-
-static struct fsl_mc_driver fsl_mc_allocator_driver = {
-	.driver = {
-		   .name = "fsl_mc_allocator",
-		   .pm = NULL,
-		   },
-	.match_id_table = match_id_table,
-	.probe = fsl_mc_allocator_probe,
-	.remove = fsl_mc_allocator_remove,
-};
-
-int __init fsl_mc_allocator_driver_init(void)
-{
-	return fsl_mc_driver_register(&fsl_mc_allocator_driver);
-}