diff --git a/arch/arm/mach-msm/include/mach/ion.h b/arch/arm/mach-msm/include/mach/ion.h new file mode 100755 index 00000000..4d12249d --- /dev/null +++ b/arch/arm/mach-msm/include/mach/ion.h @@ -0,0 +1,23 @@ +/** + * + * Copyright (c) 2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only 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 __MACH_ION_H_ +#define __MACH_ION_H_ + +enum ion_memory_types { + ION_EBI_TYPE, + ION_SMI_TYPE, +}; + +#endif diff --git a/drivers/gpu/msm/kgsl.c b/drivers/gpu/msm/kgsl.c index 626c66d8..22132197 100755 --- a/drivers/gpu/msm/kgsl.c +++ b/drivers/gpu/msm/kgsl.c @@ -1,5 +1,4 @@ /* Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved. - * Copyright (C) 2011 Sony Ericsson Mobile Communications AB. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -21,10 +20,10 @@ #include #include #include -#include #include #include +#include #include "kgsl.h" #include "kgsl_debugfs.h" @@ -45,62 +44,7 @@ module_param_named(mmutype, ksgl_mmu_type, charp, 0); MODULE_PARM_DESC(ksgl_mmu_type, "Type of MMU to be used for graphics. Valid values are 'iommu' or 'gpummu' or 'nommu'"); -#ifdef CONFIG_GENLOCK - -/** - * kgsl_add_event - Add a new timstamp event for the KGSL device - * @device - KGSL device for the new event - * @ts - the timestamp to trigger the event on - * @cb - callback function to call when the timestamp expires - * @priv - private data for the specific event type - * - * @returns - 0 on success or error code on failure - */ - -static int kgsl_add_event(struct kgsl_device *device, u32 ts, - void (*cb)(struct kgsl_device *, void *, u32), void *priv) -{ - struct kgsl_event *event; - struct list_head *n; - unsigned int cur = device->ftbl->readtimestamp(device, - KGSL_TIMESTAMP_RETIRED); - - if (cb == NULL) - return -EINVAL; - - /* Check to see if the requested timestamp has already fired */ - - if (timestamp_cmp(cur, ts) >= 0) { - cb(device, priv, cur); - return 0; - } - - event = kzalloc(sizeof(*event), GFP_KERNEL); - if (event == NULL) - return -ENOMEM; - - event->timestamp = ts; - event->priv = priv; - event->func = cb; - - /* Add the event in order to the list */ - - for (n = device->events.next ; n != &device->events; n = n->next) { - struct kgsl_event *e = - list_entry(n, struct kgsl_event, list); - - if (timestamp_cmp(e->timestamp, ts) > 0) { - list_add(&event->list, n->prev); - break; - } - } - - if (n == &device->events) - list_add_tail(&event->list, &device->events); - - return 0; -} -#endif +static struct ion_client *kgsl_ion_client; static inline struct kgsl_mem_entry * kgsl_mem_entry_create(void) @@ -127,6 +71,17 @@ kgsl_mem_entry_destroy(struct kref *kref) if (entry->memtype != KGSL_MEM_ENTRY_KERNEL) kgsl_driver.stats.mapped -= entry->memdesc.size; + /* + * Ion takes care of freeing the sglist for us (how nice ) so + * unmap the dma before freeing the sharedmem so kgsl_sharedmem_free + * doesn't try to free it again + */ + + if (entry->memtype == KGSL_MEM_ENTRY_ION) { + ion_unmap_dma(kgsl_ion_client, entry->priv_data); + entry->memdesc.sg = NULL; + } + kgsl_sharedmem_free(&entry->memdesc); switch (entry->memtype) { @@ -135,6 +90,9 @@ kgsl_mem_entry_destroy(struct kref *kref) if (entry->priv_data) fput(entry->priv_data); break; + case KGSL_MEM_ENTRY_ION: + ion_free(kgsl_ion_client, entry->priv_data); + break; } kfree(entry); @@ -1502,6 +1460,51 @@ static int kgsl_setup_ashmem(struct kgsl_mem_entry *entry, } #endif +static int kgsl_setup_ion(struct kgsl_mem_entry *entry, + struct kgsl_pagetable *pagetable, int fd) +{ + struct ion_handle *handle; + struct scatterlist *s; + unsigned long flags; + + if (kgsl_ion_client == NULL) { + kgsl_ion_client = msm_ion_client_create(UINT_MAX, KGSL_NAME); + if (kgsl_ion_client == NULL) + return -ENODEV; + } + + handle = ion_import_fd(kgsl_ion_client, fd); + if (IS_ERR_OR_NULL(handle)) + return PTR_ERR(handle); + + entry->memtype = KGSL_MEM_ENTRY_ION; + entry->priv_data = handle; + entry->memdesc.pagetable = pagetable; + entry->memdesc.size = 0; + + if (ion_handle_get_flags(kgsl_ion_client, handle, &flags)) + goto err; + + entry->memdesc.sg = ion_map_dma(kgsl_ion_client, handle, flags); + + if (IS_ERR_OR_NULL(entry->memdesc.sg)) + goto err; + + /* Calculate the size of the memdesc from the sglist */ + + entry->memdesc.sglen = 0; + + for (s = entry->memdesc.sg; s != NULL; s = sg_next(s)) { + entry->memdesc.size += s->length; + entry->memdesc.sglen++; + } + + return 0; +err: + ion_free(kgsl_ion_client, handle); + return -ENOMEM; +} + static long kgsl_ioctl_map_user_mem(struct kgsl_device_private *dev_priv, unsigned int cmd, void *data) { @@ -1566,6 +1569,10 @@ static long kgsl_ioctl_map_user_mem(struct kgsl_device_private *dev_priv, entry->memtype = KGSL_MEM_ENTRY_ASHMEM; break; + case KGSL_USER_MEM_TYPE_ION: + result = kgsl_setup_ion(entry, private->pagetable, + param->fd); + break; default: KGSL_CORE_ERR("Invalid memory type: %x\n", memtype); break; @@ -1694,114 +1701,6 @@ static long kgsl_ioctl_cff_user_event(struct kgsl_device_private *dev_priv, return result; } -#ifdef CONFIG_GENLOCK -struct kgsl_genlock_event_priv { - struct genlock_handle *handle; - struct genlock *lock; -}; - -/** - * kgsl_genlock_event_cb - Event callback for a genlock timestamp event - * @device - The KGSL device that expired the timestamp - * @priv - private data for the event - * @timestamp - the timestamp that triggered the event - * - * Release a genlock lock following the expiration of a timestamp - */ - -static void kgsl_genlock_event_cb(struct kgsl_device *device, - void *priv, u32 timestamp) -{ - struct kgsl_genlock_event_priv *ev = priv; - int ret; - - ret = genlock_lock(ev->handle, GENLOCK_UNLOCK, 0, 0); - if (ret) - KGSL_CORE_ERR("Error while unlocking genlock: %d\n", ret); - - genlock_put_handle(ev->handle); - - kfree(ev); -} - -/** - * kgsl_add_genlock-event - Create a new genlock event - * @device - KGSL device to create the event on - * @timestamp - Timestamp to trigger the event - * @data - User space buffer containing struct kgsl_genlock_event_priv - * @len - length of the userspace buffer - * @returns 0 on success or error code on error - * - * Attack to a genlock handle and register an event to release the - * genlock lock when the timestamp expires - */ - -static int kgsl_add_genlock_event(struct kgsl_device *device, - u32 timestamp, void __user *data, int len) -{ - struct kgsl_genlock_event_priv *event; - struct kgsl_timestamp_event_genlock priv; - int ret; - - if (len != sizeof(priv)) - return -EINVAL; - - if (copy_from_user(&priv, data, sizeof(priv))) - return -EFAULT; - - event = kzalloc(sizeof(*event), GFP_KERNEL); - - if (event == NULL) - return -ENOMEM; - - event->handle = genlock_get_handle_fd(priv.handle); - - if (IS_ERR(event->handle)) { - int ret = PTR_ERR(event->handle); - kfree(event); - return ret; - } - - ret = kgsl_add_event(device, timestamp, kgsl_genlock_event_cb, event); - if (ret) - kfree(event); - - return ret; -} -#else -static long kgsl_add_genlock_event(struct kgsl_device *device, - u32 timestamp, void __user *data, int len) -{ - return -EINVAL; -} -#endif - -/** - * kgsl_ioctl_timestamp_event - Register a new timestamp event from userspace - * @dev_priv - pointer to the private device structure - * @cmd - the ioctl cmd passed from kgsl_ioctl - * @data - the user data buffer from kgsl_ioctl - * @returns 0 on success or error code on failure - */ - -static long kgsl_ioctl_timestamp_event(struct kgsl_device_private *dev_priv, - unsigned int cmd, void *data) -{ - struct kgsl_timestamp_event *param = data; - int ret; - - switch (param->type) { - case KGSL_TIMESTAMP_EVENT_GENLOCK: - ret = kgsl_add_genlock_event(dev_priv->device, - param->timestamp, param->priv, param->len); - break; - default: - ret = -EINVAL; - } - - return ret; -} - typedef long (*kgsl_ioctl_func_t)(struct kgsl_device_private *, unsigned int, void *); @@ -1843,8 +1742,6 @@ static const struct { kgsl_ioctl_cff_syncmem, 0), KGSL_IOCTL_FUNC(IOCTL_KGSL_CFF_USER_EVENT, kgsl_ioctl_cff_user_event, 0), - KGSL_IOCTL_FUNC(IOCTL_KGSL_TIMESTAMP_EVENT, - kgsl_ioctl_timestamp_event, 1), }; static long kgsl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) diff --git a/drivers/gpu/msm/kgsl.h b/drivers/gpu/msm/kgsl.h index 0c5eef57..0f8ff172 100755 --- a/drivers/gpu/msm/kgsl.h +++ b/drivers/gpu/msm/kgsl.h @@ -126,7 +126,8 @@ struct kgsl_memdesc { #define KGSL_MEM_ENTRY_PMEM 1 #define KGSL_MEM_ENTRY_ASHMEM 2 #define KGSL_MEM_ENTRY_USER 3 -#define KGSL_MEM_ENTRY_MAX 4 +#define KGSL_MEM_ENTRY_ION 4 +#define KGSL_MEM_ENTRY_MAX 5 struct kgsl_mem_entry { struct kref refcount; diff --git a/drivers/gpu/msm/kgsl_sharedmem.c b/drivers/gpu/msm/kgsl_sharedmem.c index db190d25..394e78c8 100755 --- a/drivers/gpu/msm/kgsl_sharedmem.c +++ b/drivers/gpu/msm/kgsl_sharedmem.c @@ -153,6 +153,9 @@ static struct mem_entry_stats mem_stats[] = { MEM_ENTRY_STAT(KGSL_MEM_ENTRY_ASHMEM, ashmem), #endif MEM_ENTRY_STAT(KGSL_MEM_ENTRY_USER, user), +#ifdef CONFIG_ION + MEM_ENTRY_STAT(KGSL_MEM_ENTRY_USER, ion), +#endif }; void diff --git a/include/linux/ion.h b/include/linux/ion.h new file mode 100755 index 00000000..4b7b8b7d --- /dev/null +++ b/include/linux/ion.h @@ -0,0 +1,548 @@ +/* + * include/linux/ion.h + * + * Copyright (C) 2011 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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 _LINUX_ION_H +#define _LINUX_ION_H + +#include +#include + + +struct ion_handle; +/** + * enum ion_heap_types - list of all possible types of heaps + * @ION_HEAP_TYPE_SYSTEM: memory allocated via vmalloc + * @ION_HEAP_TYPE_SYSTEM_CONTIG: memory allocated via kmalloc + * @ION_HEAP_TYPE_CARVEOUT: memory allocated from a prereserved + * carveout heap, allocations are physically + * contiguous + * @ION_HEAP_END: helper for iterating over heaps + */ +enum ion_heap_type { + ION_HEAP_TYPE_SYSTEM, + ION_HEAP_TYPE_SYSTEM_CONTIG, + ION_HEAP_TYPE_CARVEOUT, + ION_HEAP_TYPE_CUSTOM, /* must be last so device specific heaps always + are at the end of this enum */ + ION_NUM_HEAPS, +}; + +#define ION_HEAP_SYSTEM_MASK (1 << ION_HEAP_TYPE_SYSTEM) +#define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG) +#define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT) + + +/** + * These are the only ids that should be used for Ion heap ids. + * The ids listed are the order in which allocation will be attempted + * if specified. Don't swap the order of heap ids unless you know what + * you are doing! + */ + +enum ion_heap_ids { + ION_HEAP_SYSTEM_ID, + ION_HEAP_SYSTEM_CONTIG_ID, + ION_HEAP_EBI_ID, + ION_HEAP_SMI_ID, + ION_HEAP_ADSP_ID, + ION_HEAP_AUDIO_ID, +}; + +#define ION_KMALLOC_HEAP_NAME "kmalloc" +#define ION_VMALLOC_HEAP_NAME "vmalloc" +#define ION_EBI1_HEAP_NAME "EBI1" +#define ION_ADSP_HEAP_NAME "adsp" +#define ION_SMI_HEAP_NAME "smi" + +#define CACHED 1 +#define UNCACHED 0 + +#define ION_CACHE_SHIFT 0 + +#define ION_SET_CACHE(__cache) ((__cache) << ION_CACHE_SHIFT) + +#define ION_IS_CACHED(__flags) ((__flags) & (1 << ION_CACHE_SHIFT)) + +#ifdef __KERNEL__ +#include +#include +struct ion_device; +struct ion_heap; +struct ion_mapper; +struct ion_client; +struct ion_buffer; + +/* This should be removed some day when phys_addr_t's are fully + plumbed in the kernel, and all instances of ion_phys_addr_t should + be converted to phys_addr_t. For the time being many kernel interfaces + do not accept phys_addr_t's that would have to */ +#define ion_phys_addr_t unsigned long + +/** + * struct ion_platform_heap - defines a heap in the given platform + * @type: type of the heap from ion_heap_type enum + * @id: unique identifier for heap. When allocating (lower numbers + * will be allocated from first) + * @name: used for debug purposes + * @base: base address of heap in physical memory if applicable + * @size: size of the heap in bytes if applicable + * + * Provided by the board file. + */ +struct ion_platform_heap { + enum ion_heap_type type; + unsigned int id; + const char *name; + ion_phys_addr_t base; + size_t size; + enum ion_memory_types memory_type; +}; + +/** + * struct ion_platform_data - array of platform heaps passed from board file + * @nr: number of structures in the array + * @heaps: array of platform_heap structions + * + * Provided by the board file in the form of platform data to a platform device. + */ +struct ion_platform_data { + int nr; + struct ion_platform_heap heaps[]; +}; + +#ifdef CONFIG_ION + +/** + * ion_client_create() - allocate a client and returns it + * @dev: the global ion device + * @heap_mask: mask of heaps this client can allocate from + * @name: used for debugging + */ +struct ion_client *ion_client_create(struct ion_device *dev, + unsigned int heap_mask, const char *name); + +/** + * msm_ion_client_create - allocate a client using the ion_device specified in + * drivers/gpu/ion/msm/msm_ion.c + * + * heap_mask and name are the same as ion_client_create, return values + * are the same as ion_client_create. + */ + +struct ion_client *msm_ion_client_create(unsigned int heap_mask, + const char *name); + +/** + * ion_client_destroy() - free's a client and all it's handles + * @client: the client + * + * Free the provided client and all it's resources including + * any handles it is holding. + */ +void ion_client_destroy(struct ion_client *client); + +/** + * ion_alloc - allocate ion memory + * @client: the client + * @len: size of the allocation + * @align: requested allocation alignment, lots of hardware blocks have + * alignment requirements of some kind + * @flags: mask of heaps to allocate from, if multiple bits are set + * heaps will be tried in order from lowest to highest order bit + * + * Allocate memory in one of the heaps provided in heap mask and return + * an opaque handle to it. + */ +struct ion_handle *ion_alloc(struct ion_client *client, size_t len, + size_t align, unsigned int flags); + +/** + * ion_free - free a handle + * @client: the client + * @handle: the handle to free + * + * Free the provided handle. + */ +void ion_free(struct ion_client *client, struct ion_handle *handle); + +/** + * ion_phys - returns the physical address and len of a handle + * @client: the client + * @handle: the handle + * @addr: a pointer to put the address in + * @len: a pointer to put the length in + * + * This function queries the heap for a particular handle to get the + * handle's physical address. It't output is only correct if + * a heap returns physically contiguous memory -- in other cases + * this api should not be implemented -- ion_map_dma should be used + * instead. Returns -EINVAL if the handle is invalid. This has + * no implications on the reference counting of the handle -- + * the returned value may not be valid if the caller is not + * holding a reference. + */ +int ion_phys(struct ion_client *client, struct ion_handle *handle, + ion_phys_addr_t *addr, size_t *len); + +/** + * ion_map_kernel - create mapping for the given handle + * @client: the client + * @handle: handle to map + * @flags: flags for this mapping + * + * Map the given handle into the kernel and return a kernel address that + * can be used to access this address. If no flags are specified, this + * will return a non-secure uncached mapping. + */ +void *ion_map_kernel(struct ion_client *client, struct ion_handle *handle, + unsigned long flags); + +/** + * ion_unmap_kernel() - destroy a kernel mapping for a handle + * @client: the client + * @handle: handle to unmap + */ +void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle); + +/** + * ion_map_dma - create a dma mapping for a given handle + * @client: the client + * @handle: handle to map + * + * Return an sglist describing the given handle + */ +struct scatterlist *ion_map_dma(struct ion_client *client, + struct ion_handle *handle, + unsigned long flags); + +/** + * ion_unmap_dma() - destroy a dma mapping for a handle + * @client: the client + * @handle: handle to unmap + */ +void ion_unmap_dma(struct ion_client *client, struct ion_handle *handle); + +/** + * ion_share() - given a handle, obtain a buffer to pass to other clients + * @client: the client + * @handle: the handle to share + * + * Given a handle, return a buffer, which exists in a global name + * space, and can be passed to other clients. Should be passed into ion_import + * to obtain a new handle for this buffer. + * + * NOTE: This function does do not an extra reference. The burden is on the + * caller to make sure the buffer doesn't go away while it's being passed to + * another client. That is, ion_free should not be called on this handle until + * the buffer has been imported into the other client. + */ +struct ion_buffer *ion_share(struct ion_client *client, + struct ion_handle *handle); + +/** + * ion_import() - given an buffer in another client, import it + * @client: this blocks client + * @buffer: the buffer to import (as obtained from ion_share) + * + * Given a buffer, add it to the client and return the handle to use to refer + * to it further. This is called to share a handle from one kernel client to + * another. + */ +struct ion_handle *ion_import(struct ion_client *client, + struct ion_buffer *buffer); + +/** + * ion_import_fd() - given an fd obtained via ION_IOC_SHARE ioctl, import it + * @client: this blocks client + * @fd: the fd + * + * A helper function for drivers that will be recieving ion buffers shared + * with them from userspace. These buffers are represented by a file + * descriptor obtained as the return from the ION_IOC_SHARE ioctl. + * This function coverts that fd into the underlying buffer, and returns + * the handle to use to refer to it further. + */ +struct ion_handle *ion_import_fd(struct ion_client *client, int fd); + +/** + * ion_handle_get_flags - get the flags for a given handle + * + * @client - client who allocated the handle + * @handle - handle to get the flags + * @flags - pointer to store the flags + * + * Gets the current flags for a handle. These flags indicate various options + * of the buffer (caching, security, etc.) + */ +int ion_handle_get_flags(struct ion_client *client, struct ion_handle *handle, + unsigned long *flags); + +#else +static inline struct ion_client *ion_client_create(struct ion_device *dev, + unsigned int heap_mask, const char *name) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct ion_client *msm_ion_client_create(unsigned int heap_mask, + const char *name) +{ + return ERR_PTR(-ENODEV); +} + +static inline void ion_client_destroy(struct ion_client *client) { } + +static inline struct ion_handle *ion_alloc(struct ion_client *client, + size_t len, size_t align, unsigned int flags) +{ + return ERR_PTR(-ENODEV); +} + +static inline void ion_free(struct ion_client *client, + struct ion_handle *handle) { } + + +static inline int ion_phys(struct ion_client *client, + struct ion_handle *handle, ion_phys_addr_t *addr, size_t *len) +{ + return -ENODEV; +} + +static inline void *ion_map_kernel(struct ion_client *client, + struct ion_handle *handle, unsigned long flags) +{ + return ERR_PTR(-ENODEV); +} + +static inline void ion_unmap_kernel(struct ion_client *client, + struct ion_handle *handle) { } + +static inline struct scatterlist *ion_map_dma(struct ion_client *client, + struct ion_handle *handle, unsigned long flags) +{ + return ERR_PTR(-ENODEV); +} + +static inline void ion_unmap_dma(struct ion_client *client, + struct ion_handle *handle) { } + +static inline struct ion_buffer *ion_share(struct ion_client *client, + struct ion_handle *handle) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct ion_handle *ion_import(struct ion_client *client, + struct ion_buffer *buffer) +{ + return ERR_PTR(-ENODEV); +} + +static inline struct ion_handle *ion_import_fd(struct ion_client *client, + int fd) +{ + return ERR_PTR(-ENODEV); +} + +static inline int ion_handle_get_flags(struct ion_client *client, + struct ion_handle *handle, unsigned long *flags) +{ + return -ENODEV; +} +#endif /* CONFIG_ION */ +#endif /* __KERNEL__ */ + +/** + * DOC: Ion Userspace API + * + * create a client by opening /dev/ion + * most operations handled via following ioctls + * + */ + +/** + * struct ion_allocation_data - metadata passed from userspace for allocations + * @len: size of the allocation + * @align: required alignment of the allocation + * @flags: flags passed to heap + * @handle: pointer that will be populated with a cookie to use to refer + * to this allocation + * + * Provided by userspace as an argument to the ioctl + */ +struct ion_allocation_data { + size_t len; + size_t align; + unsigned int flags; + struct ion_handle *handle; +}; + +/** + * struct ion_fd_data - metadata passed to/from userspace for a handle/fd pair + * @handle: a handle + * @fd: a file descriptor representing that handle + * + * For ION_IOC_SHARE or ION_IOC_MAP userspace populates the handle field with + * the handle returned from ion alloc, and the kernel returns the file + * descriptor to share or map in the fd field. For ION_IOC_IMPORT, userspace + * provides the file descriptor and the kernel returns the handle. + */ +struct ion_fd_data { + struct ion_handle *handle; + int fd; +}; + +/** + * struct ion_handle_data - a handle passed to/from the kernel + * @handle: a handle + */ +struct ion_handle_data { + struct ion_handle *handle; +}; + +/** + * struct ion_custom_data - metadata passed to/from userspace for a custom ioctl + * @cmd: the custom ioctl function to call + * @arg: additional data to pass to the custom ioctl, typically a user + * pointer to a predefined structure + * + * This works just like the regular cmd and arg fields of an ioctl. + */ +struct ion_custom_data { + unsigned int cmd; + unsigned long arg; +}; + + +/* struct ion_flush_data - data passed to ion for flushing caches + * + * @handle: handle with data to flush + * @vaddr: userspace virtual address mapped with mmap + * @offset: offset into the handle to flush + * @length: length of handle to flush + * + * Performs cache operations on the handle. If p is the start address + * of the handle, p + offset through p + offset + length will have + * the cache operations performed + */ +struct ion_flush_data { + struct ion_handle *handle; + void *vaddr; + unsigned int offset; + unsigned int length; +}; + +/* struct ion_flag_data - information about flags for this buffer + * + * @handle: handle to get flags from + * @flags: flags of this handle + * + * Takes handle as an input and outputs the flags from the handle + * in the flag field. + */ +struct ion_flag_data { + struct ion_handle *handle; + unsigned long flags; +}; + +#define ION_IOC_MAGIC 'I' + +/** + * DOC: ION_IOC_ALLOC - allocate memory + * + * Takes an ion_allocation_data struct and returns it with the handle field + * populated with the opaque handle for the allocation. + */ +#define ION_IOC_ALLOC _IOWR(ION_IOC_MAGIC, 0, \ + struct ion_allocation_data) + +/** + * DOC: ION_IOC_FREE - free memory + * + * Takes an ion_handle_data struct and frees the handle. + */ +#define ION_IOC_FREE _IOWR(ION_IOC_MAGIC, 1, struct ion_handle_data) + +/** + * DOC: ION_IOC_MAP - get a file descriptor to mmap + * + * Takes an ion_fd_data struct with the handle field populated with a valid + * opaque handle. Returns the struct with the fd field set to a file + * descriptor open in the current address space. This file descriptor + * can then be used as an argument to mmap. + */ +#define ION_IOC_MAP _IOWR(ION_IOC_MAGIC, 2, struct ion_fd_data) + +/** + * DOC: ION_IOC_SHARE - creates a file descriptor to use to share an allocation + * + * Takes an ion_fd_data struct with the handle field populated with a valid + * opaque handle. Returns the struct with the fd field set to a file + * descriptor open in the current address space. This file descriptor + * can then be passed to another process. The corresponding opaque handle can + * be retrieved via ION_IOC_IMPORT. + */ +#define ION_IOC_SHARE _IOWR(ION_IOC_MAGIC, 4, struct ion_fd_data) + +/** + * DOC: ION_IOC_IMPORT - imports a shared file descriptor + * + * Takes an ion_fd_data struct with the fd field populated with a valid file + * descriptor obtained from ION_IOC_SHARE and returns the struct with the handle + * filed set to the corresponding opaque handle. + */ +#define ION_IOC_IMPORT _IOWR(ION_IOC_MAGIC, 5, int) + +/** + * DOC: ION_IOC_CUSTOM - call architecture specific ion ioctl + * + * Takes the argument of the architecture specific ioctl to call and + * passes appropriate userdata for that ioctl + */ +#define ION_IOC_CUSTOM _IOWR(ION_IOC_MAGIC, 6, struct ion_custom_data) + + +/** + * DOC: ION_IOC_CLEAN_CACHES - clean the caches + * + * Clean the caches of the handle specified. + */ +#define ION_IOC_CLEAN_CACHES _IOWR(ION_IOC_MAGIC, 7, \ + struct ion_flush_data) +/** + * DOC: ION_MSM_IOC_INV_CACHES - invalidate the caches + * + * Invalidate the caches of the handle specified. + */ +#define ION_IOC_INV_CACHES _IOWR(ION_IOC_MAGIC, 8, \ + struct ion_flush_data) +/** + * DOC: ION_MSM_IOC_CLEAN_CACHES - clean and invalidate the caches + * + * Clean and invalidate the caches of the handle specified. + */ +#define ION_IOC_CLEAN_INV_CACHES _IOWR(ION_IOC_MAGIC, 9, \ + struct ion_flush_data) + +/** + * DOC: ION_IOC_GET_FLAGS - get the flags of the handle + * + * Gets the flags of the current handle which indicate cachability, + * secure state etc. + */ +#define ION_IOC_GET_FLAGS _IOWR(ION_IOC_MAGIC, 10, \ + struct ion_flag_data) +#endif /* _LINUX_ION_H */