media: atomisp: get rid of hmm_vm.c

This is not used anywhere. So, let's trash it.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/Makefile

@@ -53,7 +53,6 @@ atomisp-objs += \
 	pci/hmm/hmm_dynamic_pool.o \
 	pci/hmm/hmm.o \
 	pci/hmm/hmm_reserved_pool.o \
-	pci/hmm/hmm_vm.o \
 	pci/hrt/hive_isp_css_mm_hrt.o \
 	pci/ia_css_device_access.o \
 	pci/ia_css_memory_access.o \

drivers/staging/media/atomisp/include/hmm/hmm_vm.h

-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * Copyright (c) 2010 Silicon Hive www.siliconhive.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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- *
- */
-
-#ifndef	__HMM_VM_H__
-#define	__HMM_VM_H__
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mutex.h>
-#include <linux/list.h>
-
-struct hmm_vm {
-	unsigned int start;
-	unsigned int pgnr;
-	unsigned int size;
-	struct list_head vm_node_list;
-	spinlock_t lock;
-	struct kmem_cache *cache;
-};
-
-struct hmm_vm_node {
-	struct list_head list;
-	unsigned int start;
-	unsigned int pgnr;
-	unsigned int size;
-	struct hmm_vm *vm;
-};
-
-#define	ISP_VM_START	0x0
-#define	ISP_VM_SIZE	(0x7FFFFFFF)	/* 2G address space */
-#define	ISP_PTR_NULL	NULL
-
-int hmm_vm_init(struct hmm_vm *vm, unsigned int start,
-		unsigned int size);
-
-void hmm_vm_clean(struct hmm_vm *vm);
-
-struct hmm_vm_node *hmm_vm_alloc_node(struct hmm_vm *vm,
-				      unsigned int pgnr);
-
-void hmm_vm_free_node(struct hmm_vm_node *node);
-
-struct hmm_vm_node *hmm_vm_find_node_start(struct hmm_vm *vm,
-	unsigned int addr);
-
-struct hmm_vm_node *hmm_vm_find_node_in_range(struct hmm_vm *vm,
-	unsigned int addr);
-
-#endif

drivers/staging/media/atomisp/pci/hmm/hmm_vm.c

-/*
- * Support for Medifield PNW Camera Imaging ISP subsystem.
- *
- * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
- *
- * Copyright (c) 2010 Silicon Hive www.siliconhive.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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- *
- */
-/*
- * This file contains function for ISP virtual address management in ISP driver
- */
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <asm/page.h>
-
-#include "atomisp_internal.h"
-#include "mmu/isp_mmu.h"
-#include "hmm/hmm_vm.h"
-#include "hmm/hmm_common.h"
-
-static unsigned int vm_node_end(unsigned int start, unsigned int pgnr)
-{
-	return start + pgnr_to_size(pgnr);
-}
-
-static int addr_in_vm_node(unsigned int addr,
-			   struct hmm_vm_node *node)
-{
-	return (addr >= node->start) && (addr < (node->start + node->size));
-}
-
-int hmm_vm_init(struct hmm_vm *vm, unsigned int start,
-		unsigned int size)
-{
-	if (!vm)
-		return -1;
-
-	vm->start = start;
-	vm->pgnr = size_to_pgnr_ceil(size);
-	vm->size = pgnr_to_size(vm->pgnr);
-
-	INIT_LIST_HEAD(&vm->vm_node_list);
-	spin_lock_init(&vm->lock);
-	vm->cache = kmem_cache_create("atomisp_vm", sizeof(struct hmm_vm_node),
-				      0, 0, NULL);
-
-	return vm->cache ? 0 : -ENOMEM;
-}
-
-void hmm_vm_clean(struct hmm_vm *vm)
-{
-	struct hmm_vm_node *node, *tmp;
-	struct list_head new_head;
-
-	if (!vm)
-		return;
-
-	spin_lock(&vm->lock);
-	list_replace_init(&vm->vm_node_list, &new_head);
-	spin_unlock(&vm->lock);
-
-	list_for_each_entry_safe(node, tmp, &new_head, list) {
-		list_del(&node->list);
-		kmem_cache_free(vm->cache, node);
-	}
-
-	kmem_cache_destroy(vm->cache);
-}
-
-static struct hmm_vm_node *alloc_hmm_vm_node(unsigned int pgnr,
-	struct hmm_vm *vm)
-{
-	struct hmm_vm_node *node;
-
-	node = kmem_cache_alloc(vm->cache, GFP_KERNEL);
-	if (!node)
-		return NULL;
-
-	INIT_LIST_HEAD(&node->list);
-	node->pgnr = pgnr;
-	node->size = pgnr_to_size(pgnr);
-	node->vm = vm;
-
-	return node;
-}
-
-struct hmm_vm_node *hmm_vm_alloc_node(struct hmm_vm *vm, unsigned int pgnr)
-{
-	struct list_head *head;
-	struct hmm_vm_node *node, *cur, *next;
-	unsigned int vm_start, vm_end;
-	unsigned int addr;
-	unsigned int size;
-
-	if (!vm)
-		return NULL;
-
-	vm_start = vm->start;
-	vm_end = vm_node_end(vm->start, vm->pgnr);
-	size = pgnr_to_size(pgnr);
-
-	addr = vm_start;
-	head = &vm->vm_node_list;
-
-	node = alloc_hmm_vm_node(pgnr, vm);
-	if (!node) {
-		dev_err(atomisp_dev, "no memory to allocate hmm vm node.\n");
-		return NULL;
-	}
-
-	spin_lock(&vm->lock);
-	/*
-	 * if list is empty, the loop code will not be executed.
-	 */
-	list_for_each_entry(cur, head, list) {
-		/* Add gap between vm areas as helper to not hide overflow */
-		addr = PAGE_ALIGN(vm_node_end(cur->start, cur->pgnr) + 1);
-
-		if (list_is_last(&cur->list, head)) {
-			if (addr + size > vm_end) {
-				/* vm area does not have space anymore */
-				spin_unlock(&vm->lock);
-				kmem_cache_free(vm->cache, node);
-				dev_err(atomisp_dev,
-					"no enough virtual address space.\n");
-				return NULL;
-			}
-
-			/* We still have vm space to add new node to tail */
-			break;
-		}
-
-		next = list_entry(cur->list.next, struct hmm_vm_node, list);
-		if ((next->start - addr) > size)
-			break;
-	}
-	node->start = addr;
-	node->vm = vm;
-	list_add(&node->list, &cur->list);
-	spin_unlock(&vm->lock);
-
-	return node;
-}
-
-void hmm_vm_free_node(struct hmm_vm_node *node)
-{
-	struct hmm_vm *vm;
-
-	if (!node)
-		return;
-
-	vm = node->vm;
-
-	spin_lock(&vm->lock);
-	list_del(&node->list);
-	spin_unlock(&vm->lock);
-
-	kmem_cache_free(vm->cache, node);
-}
-
-struct hmm_vm_node *hmm_vm_find_node_start(struct hmm_vm *vm, unsigned int addr)
-{
-	struct hmm_vm_node *node;
-
-	if (!vm)
-		return NULL;
-
-	spin_lock(&vm->lock);
-
-	list_for_each_entry(node, &vm->vm_node_list, list) {
-		if (node->start == addr) {
-			spin_unlock(&vm->lock);
-			return node;
-		}
-	}
-
-	spin_unlock(&vm->lock);
-	return NULL;
-}
-
-struct hmm_vm_node *hmm_vm_find_node_in_range(struct hmm_vm *vm,
-	unsigned int addr)
-{
-	struct hmm_vm_node *node;
-
-	if (!vm)
-		return NULL;
-
-	spin_lock(&vm->lock);
-
-	list_for_each_entry(node, &vm->vm_node_list, list) {
-		if (addr_in_vm_node(addr, node)) {
-			spin_unlock(&vm->lock);
-			return node;
-		}
-	}
-
-	spin_unlock(&vm->lock);
-	return NULL;
-}