removed unneeded drivers

1 files changed, 0 insertions, 510 deletions

diff --git a/drivers/iommu/exynos-iovmm.c b/drivers/iommu/exynos-iovmm.c
deleted file mode 100644
index bc78722..0000000
--- a/drivers/iommu/exynos-iovmm.c
+++ /dev/null
@@ -1,510 +0,0 @@
-/* linux/arch/arm/plat-s5p/s5p_iovmm.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- *		http://www.samsung.com
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifdef CONFIG_EXYNOS_IOMMU_DEBUG
-#define DEBUG
-#endif
-
-#include <linux/slab.h>
-#include <linux/scatterlist.h>
-#include <linux/device.h>
-#include <linux/list.h>
-#include <linux/iommu.h>
-#include <linux/genalloc.h>
-#include <linux/err.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/atomic.h>
-#include <linux/rculist.h>
-
-#include <plat/iovmm.h>
-
-#define IOVA_START 0xC0000000
-#define IOVM_SIZE (SZ_1G - SZ_4K) /* last 4K is for error values */
-
-struct s5p_vm_region {
-	struct list_head node;
-	dma_addr_t start;
-	size_t size;
-};
-
-struct s5p_iovmm {
-	struct list_head node;		/* element of s5p_iovmm_list */
-	struct rcu_head rcu;
-	struct iommu_domain *domain;
-	struct device *dev;
-	struct gen_pool *vmm_pool;
-	struct list_head regions_list;	/* list of s5p_vm_region */
-	atomic_t activations;
-	int num_setup;
-	spinlock_t lock;
-};
-
-static LIST_HEAD(s5p_iovmm_list);
-
-static struct s5p_iovmm *find_iovmm(struct device *dev)
-{
-	struct s5p_iovmm *vmm;
-
-	list_for_each_entry(vmm, &s5p_iovmm_list, node)
-		if ((vmm->dev == dev) && (vmm->num_setup > 0))
-			return vmm;
-
-	return NULL;
-}
-
-static struct s5p_vm_region *find_region(struct s5p_iovmm *vmm, dma_addr_t iova)
-{
-	struct s5p_vm_region *region;
-
-	list_for_each_entry(region, &vmm->regions_list, node)
-		if (region->start == iova)
-			return region;
-
-	return NULL;
-}
-
-int iovmm_setup(struct device *dev)
-{
-	struct s5p_iovmm *vmm = NULL;
-	struct list_head *pos;
-	int ret;
-
-	list_for_each(pos, &s5p_iovmm_list) {
-		vmm = list_entry(pos, struct s5p_iovmm, node);
-		if (vmm->dev == dev) {
-			struct s5p_iovmm *rcu_vmm;
-
-			rcu_vmm = kmalloc(sizeof(*rcu_vmm), GFP_KERNEL);
-			if (rcu_vmm == NULL)
-				return -ENOMEM;
-
-			memcpy(rcu_vmm, vmm, sizeof(*vmm));
-			rcu_vmm->num_setup++;
-			list_replace_rcu(&vmm->node, &rcu_vmm->node);
-
-			kfree(vmm);
-
-			return 0;
-		}
-	}
-
-	vmm = kzalloc(sizeof(*vmm), GFP_KERNEL);
-	if (!vmm) {
-		ret = -ENOMEM;
-		goto err_setup_alloc;
-	}
-
-	vmm->vmm_pool = gen_pool_create(PAGE_SHIFT, -1);
-	if (!vmm->vmm_pool) {
-		ret = -ENOMEM;
-		goto err_setup_genalloc;
-	}
-
-	/* (1GB - 4KB) addr space from 0xC0000000 */
-	ret = gen_pool_add(vmm->vmm_pool, IOVA_START, IOVM_SIZE, -1);
-	if (ret)
-		goto err_setup_domain;
-
-	vmm->domain = iommu_domain_alloc(&platform_bus_type);
-	if (!vmm->domain) {
-		ret = -ENOMEM;
-		goto err_setup_domain;
-	}
-
-	vmm->dev = dev;
-	vmm->num_setup = 1;
-
-	spin_lock_init(&vmm->lock);
-
-	INIT_LIST_HEAD(&vmm->node);
-	INIT_LIST_HEAD(&vmm->regions_list);
-	atomic_set(&vmm->activations, 0);
-
-	list_add_rcu(&vmm->node, &s5p_iovmm_list);
-
-	dev_dbg(dev, "IOVMM: Created %#x B IOVMM from %#x.\n",
-						IOVM_SIZE, IOVA_START);
-
-	return 0;
-err_setup_domain:
-	gen_pool_destroy(vmm->vmm_pool);
-err_setup_genalloc:
-	kfree(vmm);
-err_setup_alloc:
-	dev_dbg(dev, "IOVMM: Failed to create IOVMM (%d)\n", ret);
-	return ret;
-}
-
-static void iovmm_destroy(struct rcu_head *rcu)
-{
-	struct s5p_iovmm *vmm = container_of(rcu, struct s5p_iovmm, rcu);
-	struct list_head *pos, *tmp;
-
-	while (WARN_ON(atomic_dec_return(&vmm->activations) > 0))
-		iommu_detach_device(vmm->domain, vmm->dev);
-
-	iommu_domain_free(vmm->domain);
-
-	WARN_ON(!list_empty(&vmm->regions_list));
-
-	list_for_each_safe(pos, tmp, &vmm->regions_list) {
-		struct s5p_vm_region *region;
-
-		region = list_entry(pos, struct s5p_vm_region, node);
-
-		/* No need to unmap the region because
-		 * iommu_domain_free() frees the page table */
-		gen_pool_free(vmm->vmm_pool, region->start,
-							region->size);
-
-		kfree(list_entry(pos, struct s5p_vm_region, node));
-	}
-
-	gen_pool_destroy(vmm->vmm_pool);
-
-	dev_dbg(vmm->dev, "IOVMM: Removed IOVMM\n");
-
-	kfree(vmm);
-}
-
-void iovmm_cleanup(struct device *dev)
-{
-	struct s5p_iovmm *vmm, *n;
-
-	list_for_each_entry_safe(vmm, n, &s5p_iovmm_list, node) {
-		if (vmm->dev == dev) {
-			struct s5p_iovmm *rcu_vmm = NULL;
-
-			while (rcu_vmm == NULL) /* should success */
-				rcu_vmm = kmalloc(sizeof(*rcu_vmm), GFP_ATOMIC);
-
-			memcpy(rcu_vmm, vmm, sizeof(*vmm));
-			rcu_vmm->num_setup--;
-			list_replace_rcu(&vmm->node, &rcu_vmm->node);
-
-			kfree(vmm);
-
-			if (rcu_vmm->num_setup == 0) {
-				list_del_rcu(&rcu_vmm->node);
-				call_rcu(&rcu_vmm->rcu, iovmm_destroy);
-			}
-
-			return;
-		}
-	}
-
-	WARN(true, "%s: No IOVMM exist for %s\n", __func__, dev_name(dev));
-}
-
-int iovmm_activate(struct device *dev)
-{
-	struct s5p_iovmm *vmm;
-	int ret = 0;
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-	if (WARN_ON(!vmm)) {
-		rcu_read_unlock();
-		return -EINVAL;
-	}
-
-	ret = iommu_attach_device(vmm->domain, vmm->dev);
-	if (!ret)
-		atomic_inc(&vmm->activations);
-
-	rcu_read_unlock();
-
-	return ret;
-}
-
-void iovmm_deactivate(struct device *dev)
-{
-	struct s5p_iovmm *vmm;
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-	if (WARN_ON(!vmm)) {
-		rcu_read_unlock();
-		return;
-	}
-
-	iommu_detach_device(vmm->domain, vmm->dev);
-
-	atomic_add_unless(&vmm->activations, -1, 0);
-
-	rcu_read_unlock();
-}
-
-dma_addr_t iovmm_map(struct device *dev, struct scatterlist *sg, off_t offset,
-								size_t size)
-{
-	off_t start_off;
-	dma_addr_t addr, start = 0;
-	size_t mapped_size = 0;
-	struct s5p_vm_region *region;
-	struct s5p_iovmm *vmm;
-	int order;
-	unsigned long flags;
-#ifdef CONFIG_EXYNOS_IOVMM_ALIGN64K
-	size_t iova_size = 0;
-#endif
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-	if (WARN_ON(!vmm))
-		goto err_map_nomem;
-
-	for (; sg_dma_len(sg) < offset; sg = sg_next(sg))
-		offset -= sg_dma_len(sg);
-
-	start_off = offset_in_page(sg_phys(sg) + offset);
-	size = PAGE_ALIGN(size + start_off);
-
-	order = __fls(min_t(size_t, size, SZ_1M));
-
-	region = kmalloc(sizeof(*region), GFP_KERNEL);
-	if (!region)
-		goto err_map_nomem;
-
-	INIT_LIST_HEAD(&region->node);
-
-	spin_lock_irqsave(&vmm->lock, flags);
-
-#ifdef CONFIG_EXYNOS_IOVMM_ALIGN64K
-	iova_size = ALIGN(size, SZ_64K);
-	start = (dma_addr_t)gen_pool_alloc_aligned(vmm->vmm_pool, iova_size,
-									order);
-#else
-	start = (dma_addr_t)gen_pool_alloc_aligned(vmm->vmm_pool, size, order);
-#endif
-	if (!start)
-		goto err_map_nomem_lock;
-
-	addr = start;
-	do {
-		phys_addr_t phys;
-		size_t len;
-
-		phys = sg_phys(sg);
-		len = sg_dma_len(sg);
-
-		if (offset > 0) {
-			len -= offset;
-			phys += offset;
-			offset = 0;
-		}
-
-		if (offset_in_page(phys)) {
-			len += offset_in_page(phys);
-			phys = round_down(phys, PAGE_SIZE);
-		}
-
-		len = PAGE_ALIGN(len);
-
-		if (len > (size - mapped_size))
-			len = size - mapped_size;
-
-		if (iommu_map(vmm->domain, addr, phys, len, 0))
-			break;
-
-		addr += len;
-		mapped_size += len;
-	} while ((sg = sg_next(sg)) && (mapped_size < size));
-
-	BUG_ON(mapped_size > size);
-
-	if (mapped_size < size)
-		goto err_map_map;
-
-#ifdef CONFIG_EXYNOS_IOVMM_ALIGN64K
-	if (iova_size != size) {
-		addr = start + size;
-		size = iova_size;
-
-		for (; addr < start + size; addr += PAGE_SIZE) {
-			if (iommu_map(vmm->domain, addr,
-				page_to_phys(ZERO_PAGE(0)), PAGE_SIZE, 0))
-				goto err_map_map;
-
-			mapped_size += PAGE_SIZE;
-		}
-	}
-#endif
-
-	region->start = start + start_off;
-	region->size = size;
-
-	list_add(&region->node, &vmm->regions_list);
-
-	spin_unlock_irqrestore(&vmm->lock, flags);
-
-	dev_dbg(dev, "IOVMM: Allocated VM region @ %#x/%#X bytes.\n",
-					region->start, region->size);
-
-	rcu_read_unlock();
-
-	return region->start;
-
-err_map_map:
-	iommu_unmap(vmm->domain, start, mapped_size);
-	gen_pool_free(vmm->vmm_pool, start, size);
-err_map_nomem_lock:
-	spin_unlock_irqrestore(&vmm->lock, flags);
-	kfree(region);
-err_map_nomem:
-	dev_dbg(dev, "IOVMM: Failed to allocated VM region for %#x bytes.\n",
-									size);
-	rcu_read_unlock();
-
-	return (dma_addr_t)0;
-}
-
-void iovmm_unmap(struct device *dev, dma_addr_t iova)
-{
-	struct s5p_vm_region *region;
-	struct s5p_iovmm *vmm;
-	unsigned long flags;
-	size_t unmapped_size;
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-
-	if (WARN_ON(!vmm)) {
-		rcu_read_unlock();
-		return;
-	}
-
-	spin_lock_irqsave(&vmm->lock, flags);
-
-	region = find_region(vmm, iova);
-	if (WARN_ON(!region))
-		goto err_region_not_found;
-
-	region->start = round_down(region->start, PAGE_SIZE);
-
-	gen_pool_free(vmm->vmm_pool, region->start, region->size);
-	list_del(&region->node);
-
-	unmapped_size = iommu_unmap(vmm->domain, region->start, region->size);
-
-	WARN_ON(unmapped_size != region->size);
-	dev_dbg(dev, "IOVMM: Unmapped %#x bytes from %#x.\n",
-					unmapped_size, region->start);
-
-	kfree(region);
-err_region_not_found:
-	spin_unlock_irqrestore(&vmm->lock, flags);
-
-	rcu_read_unlock();
-}
-
-int iovmm_map_oto(struct device *dev, phys_addr_t phys, size_t size)
-{
-	struct s5p_vm_region *region;
-	struct s5p_iovmm *vmm;
-	unsigned long flags;
-	int ret;
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-	if (WARN_ON(!vmm)) {
-		ret = -EINVAL;
-		goto err_map_nomem;
-	}
-
-	region = kmalloc(sizeof(*region), GFP_KERNEL);
-	if (!region) {
-		ret = -ENOMEM;
-		goto err_map_nomem;
-	}
-
-	if (WARN_ON((phys + size) >= IOVA_START)) {
-		dev_err(dev,
-			"Unable to create one to one mapping for %#x @ %#x\n",
-			size, phys);
-		ret = -EINVAL;
-		goto err_out_of_memory;
-	}
-
-	if (WARN_ON(phys & ~PAGE_MASK))
-		phys = round_down(phys, PAGE_SIZE);
-
-	spin_lock_irqsave(&vmm->lock, flags);
-
-	ret = iommu_map(vmm->domain, (dma_addr_t)phys, phys, size, 0);
-	if (ret < 0)
-		goto err_map_failed;
-
-	region->start = (dma_addr_t)phys;
-	region->size = size;
-	INIT_LIST_HEAD(&region->node);
-
-	list_add(&region->node, &vmm->regions_list);
-
-	spin_unlock_irqrestore(&vmm->lock, flags);
-
-	rcu_read_unlock();
-
-	return 0;
-
-err_map_failed:
-	spin_unlock_irqrestore(&vmm->lock, flags);
-err_out_of_memory:
-	kfree(region);
-err_map_nomem:
-	rcu_read_unlock();
-
-	return ret;
-}
-
-void iovmm_unmap_oto(struct device *dev, phys_addr_t phys)
-{
-	struct s5p_vm_region *region;
-	struct s5p_iovmm *vmm;
-	unsigned long flags;
-	size_t unmapped_size;
-
-	rcu_read_lock();
-
-	vmm = find_iovmm(dev);
-	if (WARN_ON(!vmm)) {
-		rcu_read_unlock();
-		return;
-	}
-
-	if (WARN_ON(phys & ~PAGE_MASK))
-		phys = round_down(phys, PAGE_SIZE);
-
-	spin_lock_irqsave(&vmm->lock, flags);
-
-	region = find_region(vmm, (dma_addr_t)phys);
-	if (WARN_ON(!region))
-		goto err_region_not_found;
-
-	list_del(&region->node);
-
-	unmapped_size = iommu_unmap(vmm->domain, region->start, region->size);
-
-	WARN_ON(unmapped_size != region->size);
-	dev_dbg(dev, "IOVMM: Unmapped %#x bytes from %#x.\n",
-					unmapped_size, region->start);
-
-	kfree(region);
-err_region_not_found:
-	spin_unlock_irqrestore(&vmm->lock, flags);
-
-	rcu_read_unlock();
-}