diff options
| -rw-r--r-- | drivers/misc/fastrpc.c | 730 | ||||
| -rw-r--r-- | include/uapi/misc/fastrpc.h | 23 |
2 files changed, 753 insertions, 0 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 10b93fd5659a..cd69f8b308f6 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -2,7 +2,9 @@ // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved. // Copyright (c) 2018, Linaro Limited +#include <linux/completion.h> #include <linux/device.h> +#include <linux/dma-buf.h> #include <linux/dma-mapping.h> #include <linux/idr.h> #include <linux/list.h> @@ -14,6 +16,7 @@ #include <linux/rpmsg.h> #include <linux/scatterlist.h> #include <linux/slab.h> +#include <uapi/misc/fastrpc.h> #define ADSP_DOMAIN_ID (0) #define MDSP_DOMAIN_ID (1) @@ -21,14 +24,118 @@ #define CDSP_DOMAIN_ID (3) #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/ #define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/ +#define FASTRPC_ALIGN 128 +#define FASTRPC_MAX_FDLIST 16 +#define FASTRPC_MAX_CRCLIST 64 +#define FASTRPC_PHYS(p) ((p) & 0xffffffff) #define FASTRPC_CTX_MAX (256) #define FASTRPC_CTXID_MASK (0xFF0) #define FASTRPC_DEVICE_NAME "fastrpc" +/* Retrives number of input buffers from the scalars parameter */ +#define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff) + +/* Retrives number of output buffers from the scalars parameter */ +#define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff) + +/* Retrives number of input handles from the scalars parameter */ +#define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f) + +/* Retrives number of output handles from the scalars parameter */ +#define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f) + +#define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \ + REMOTE_SCALARS_OUTBUFS(sc) + \ + REMOTE_SCALARS_INHANDLES(sc)+ \ + REMOTE_SCALARS_OUTHANDLES(sc)) +#define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \ + (((attr & 0x07) << 29) | \ + ((method & 0x1f) << 24) | \ + ((in & 0xff) << 16) | \ + ((out & 0xff) << 8) | \ + ((oin & 0x0f) << 4) | \ + (oout & 0x0f)) + +#define FASTRPC_SCALARS(method, in, out) \ + FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0) + #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev) static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp", "sdsp", "cdsp"}; +struct fastrpc_phy_page { + u64 addr; /* physical address */ + u64 size; /* size of contiguous region */ +}; + +struct fastrpc_invoke_buf { + u32 num; /* number of contiguous regions */ + u32 pgidx; /* index to start of contiguous region */ +}; + +struct fastrpc_remote_arg { + u64 pv; + u64 len; +}; + +struct fastrpc_msg { + int pid; /* process group id */ + int tid; /* thread id */ + u64 ctx; /* invoke caller context */ + u32 handle; /* handle to invoke */ + u32 sc; /* scalars structure describing the data */ + u64 addr; /* physical address */ + u64 size; /* size of contiguous region */ +}; + +struct fastrpc_invoke_rsp { + u64 ctx; /* invoke caller context */ + int retval; /* invoke return value */ +}; + +struct fastrpc_buf { + struct fastrpc_user *fl; + struct device *dev; + void *virt; + u64 phys; + u64 size; +}; + +struct fastrpc_map { + struct list_head node; + struct fastrpc_user *fl; + int fd; + struct dma_buf *buf; + struct sg_table *table; + struct dma_buf_attachment *attach; + u64 phys; + u64 size; + void *va; + u64 len; + struct kref refcount; +}; + +struct fastrpc_invoke_ctx { + int nscalars; + int nbufs; + int retval; + int pid; + int tgid; + u32 sc; + u32 *crc; + u64 ctxid; + u64 msg_sz; + struct kref refcount; + struct list_head node; /* list of ctxs */ + struct completion work; + struct fastrpc_msg msg; + struct fastrpc_user *fl; + struct fastrpc_remote_arg *rpra; + struct fastrpc_map **maps; + struct fastrpc_buf *buf; + struct fastrpc_invoke_args *args; + struct fastrpc_channel_ctx *cctx; +}; struct fastrpc_session_ctx { struct device *dev; @@ -55,6 +162,7 @@ struct fastrpc_user { struct fastrpc_channel_ctx *cctx; struct fastrpc_session_ctx *sctx; + struct fastrpc_buf *init_mem; int tgid; int pd; @@ -64,6 +172,522 @@ struct fastrpc_user { struct mutex mutex; }; +static void fastrpc_free_map(struct kref *ref) +{ + struct fastrpc_map *map; + + map = container_of(ref, struct fastrpc_map, refcount); + + if (map->table) { + dma_buf_unmap_attachment(map->attach, map->table, + DMA_BIDIRECTIONAL); + dma_buf_detach(map->buf, map->attach); + dma_buf_put(map->buf); + } + + kfree(map); +} + +static void fastrpc_map_put(struct fastrpc_map *map) +{ + if (map) + kref_put(&map->refcount, fastrpc_free_map); +} + +static void fastrpc_map_get(struct fastrpc_map *map) +{ + if (map) + kref_get(&map->refcount); +} + +static int fastrpc_map_find(struct fastrpc_user *fl, int fd, + struct fastrpc_map **ppmap) +{ + struct fastrpc_map *map = NULL; + + mutex_lock(&fl->mutex); + list_for_each_entry(map, &fl->maps, node) { + if (map->fd == fd) { + fastrpc_map_get(map); + *ppmap = map; + mutex_unlock(&fl->mutex); + return 0; + } + } + mutex_unlock(&fl->mutex); + + return -ENOENT; +} + +static void fastrpc_buf_free(struct fastrpc_buf *buf) +{ + dma_free_coherent(buf->dev, buf->size, buf->virt, + FASTRPC_PHYS(buf->phys)); + kfree(buf); +} + +static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev, + u64 size, struct fastrpc_buf **obuf) +{ + struct fastrpc_buf *buf; + + buf = kzalloc(sizeof(*buf), GFP_KERNEL); + if (!buf) + return -ENOMEM; + + buf->fl = fl; + buf->virt = NULL; + buf->phys = 0; + buf->size = size; + buf->dev = dev; + + buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys, + GFP_KERNEL); + if (!buf->virt) + return -ENOMEM; + + if (fl->sctx && fl->sctx->sid) + buf->phys += ((u64)fl->sctx->sid << 32); + + *obuf = buf; + + return 0; +} + +static void fastrpc_context_free(struct kref *ref) +{ + struct fastrpc_invoke_ctx *ctx; + struct fastrpc_channel_ctx *cctx; + int i; + + ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount); + cctx = ctx->cctx; + + for (i = 0; i < ctx->nscalars; i++) + fastrpc_map_put(ctx->maps[i]); + + if (ctx->buf) + fastrpc_buf_free(ctx->buf); + + spin_lock(&cctx->lock); + idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4); + spin_unlock(&cctx->lock); + + kfree(ctx->maps); + kfree(ctx); +} + +static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx) +{ + kref_get(&ctx->refcount); +} + +static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx) +{ + kref_put(&ctx->refcount, fastrpc_context_free); +} + +static struct fastrpc_invoke_ctx *fastrpc_context_alloc( + struct fastrpc_user *user, u32 kernel, u32 sc, + struct fastrpc_invoke_args *args) +{ + struct fastrpc_channel_ctx *cctx = user->cctx; + struct fastrpc_invoke_ctx *ctx = NULL; + int ret; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return ERR_PTR(-ENOMEM); + + INIT_LIST_HEAD(&ctx->node); + ctx->fl = user; + ctx->nscalars = REMOTE_SCALARS_LENGTH(sc); + ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) + + REMOTE_SCALARS_OUTBUFS(sc); + + if (ctx->nscalars) { + ctx->maps = kcalloc(ctx->nscalars, + sizeof(*ctx->maps), GFP_KERNEL); + if (!ctx->maps) { + kfree(ctx); + return ERR_PTR(-ENOMEM); + } + ctx->args = args; + } + + ctx->sc = sc; + ctx->retval = -1; + ctx->pid = current->pid; + ctx->tgid = user->tgid; + ctx->cctx = cctx; + init_completion(&ctx->work); + + spin_lock(&user->lock); + list_add_tail(&ctx->node, &user->pending); + spin_unlock(&user->lock); + + spin_lock(&cctx->lock); + ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1, + FASTRPC_CTX_MAX, GFP_ATOMIC); + if (ret < 0) { + spin_unlock(&cctx->lock); + goto err_idr; + } + ctx->ctxid = ret << 4; + spin_unlock(&cctx->lock); + + kref_init(&ctx->refcount); + + return ctx; +err_idr: + spin_lock(&user->lock); + list_del(&ctx->node); + spin_unlock(&user->lock); + kfree(ctx->maps); + kfree(ctx); + + return ERR_PTR(ret); +} + +static int fastrpc_map_create(struct fastrpc_user *fl, int fd, + u64 len, struct fastrpc_map **ppmap) +{ + struct fastrpc_session_ctx *sess = fl->sctx; + struct fastrpc_map *map = NULL; + int err = 0; + + if (!fastrpc_map_find(fl, fd, ppmap)) + return 0; + + map = kzalloc(sizeof(*map), GFP_KERNEL); + if (!map) + return -ENOMEM; + + INIT_LIST_HEAD(&map->node); + map->fl = fl; + map->fd = fd; + map->buf = dma_buf_get(fd); + if (!map->buf) { + err = -EINVAL; + goto get_err; + } + + map->attach = dma_buf_attach(map->buf, sess->dev); + if (IS_ERR(map->attach)) { + dev_err(sess->dev, "Failed to attach dmabuf\n"); + err = PTR_ERR(map->attach); + goto attach_err; + } + + map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL); + if (IS_ERR(map->table)) { + err = PTR_ERR(map->table); + goto map_err; + } + + map->phys = sg_dma_address(map->table->sgl); + map->phys += ((u64)fl->sctx->sid << 32); + map->size = len; + map->va = sg_virt(map->table->sgl); + map->len = len; + kref_init(&map->refcount); + + spin_lock(&fl->lock); + list_add_tail(&map->node, &fl->maps); + spin_unlock(&fl->lock); + *ppmap = map; + + return 0; + +map_err: + dma_buf_detach(map->buf, map->attach); +attach_err: + dma_buf_put(map->buf); +get_err: + kfree(map); + + return err; +} + +/* + * Fastrpc payload buffer with metadata looks like: + * + * >>>>>> START of METADATA <<<<<<<<< + * +---------------------------------+ + * | Arguments | + * | type:(struct fastrpc_remote_arg)| + * | (0 - N) | + * +---------------------------------+ + * | Invoke Buffer list | + * | type:(struct fastrpc_invoke_buf)| + * | (0 - N) | + * +---------------------------------+ + * | Page info list | + * | type:(struct fastrpc_phy_page) | + * | (0 - N) | + * +---------------------------------+ + * | Optional info | + * |(can be specific to SoC/Firmware)| + * +---------------------------------+ + * >>>>>>>> END of METADATA <<<<<<<<< + * +---------------------------------+ + * | Inline ARGS | + * | (0-N) | + * +---------------------------------+ + */ + +static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx) +{ + int size = 0; + + size = (sizeof(struct fastrpc_remote_arg) + + sizeof(struct fastrpc_invoke_buf) + + sizeof(struct fastrpc_phy_page)) * ctx->nscalars + + sizeof(u64) * FASTRPC_MAX_FDLIST + + sizeof(u32) * FASTRPC_MAX_CRCLIST; + + return size; +} + +static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen) +{ + u64 size = 0; + int i; + + size = ALIGN(metalen, FASTRPC_ALIGN); + for (i = 0; i < ctx->nscalars; i++) { + if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) { + size = ALIGN(size, FASTRPC_ALIGN); + size += ctx->args[i].length; + } + } + + return size; +} + +static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx) +{ + struct device *dev = ctx->fl->sctx->dev; + int i, err; + + for (i = 0; i < ctx->nscalars; ++i) { + /* Make sure reserved field is set to 0 */ + if (ctx->args[i].reserved) + return -EINVAL; + + if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 || + ctx->args[i].length == 0) + continue; + + err = fastrpc_map_create(ctx->fl, ctx->args[i].fd, + ctx->args[i].length, &ctx->maps[i]); + if (err) { + dev_err(dev, "Error Creating map %d\n", err); + return -EINVAL; + } + + } + return 0; +} + +static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) +{ + struct device *dev = ctx->fl->sctx->dev; + struct fastrpc_remote_arg *rpra; + struct fastrpc_invoke_buf *list; + struct fastrpc_phy_page *pages; + int inbufs, i, err = 0; + u64 rlen, pkt_size; + uintptr_t args; + int metalen; + + + inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); + metalen = fastrpc_get_meta_size(ctx); + pkt_size = fastrpc_get_payload_size(ctx, metalen); + + err = fastrpc_create_maps(ctx); + if (err) + return err; + + ctx->msg_sz = pkt_size; + + err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf); + if (err) + return err; + + rpra = ctx->buf->virt; + list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra); + pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) + + sizeof(*rpra)); + args = (uintptr_t)ctx->buf->virt + metalen; + rlen = pkt_size - metalen; + ctx->rpra = rpra; + + for (i = 0; i < ctx->nbufs; ++i) { + u64 len = ctx->args[i].length; + + rpra[i].pv = 0; + rpra[i].len = len; + list[i].num = len ? 1 : 0; + list[i].pgidx = i; + + if (!len) + continue; + + pages[i].size = roundup(len, PAGE_SIZE); + + if (ctx->maps[i]) { + rpra[i].pv = (u64) ctx->args[i].ptr; + pages[i].addr = ctx->maps[i]->phys; + } else { + rlen -= ALIGN(args, FASTRPC_ALIGN) - args; + args = ALIGN(args, FASTRPC_ALIGN); + if (rlen < len) + goto bail; + + rpra[i].pv = args; + pages[i].addr = ctx->buf->phys + (pkt_size - rlen); + pages[i].addr = pages[i].addr & PAGE_MASK; + args = args + len; + rlen -= len; + } + + if (i < inbufs && !ctx->maps[i]) { + void *dst = (void *)(uintptr_t)rpra[i].pv; + void *src = (void *)(uintptr_t)ctx->args[i].ptr; + + if (!kernel) { + if (copy_from_user(dst, (void __user *)src, + len)) { + err = -EFAULT; + goto bail; + } + } else { + memcpy(dst, src, len); + } + } + } + + for (i = ctx->nbufs; i < ctx->nscalars; ++i) { + rpra[i].pv = (u64) ctx->args[i].ptr; + rpra[i].len = ctx->args[i].length; + list[i].num = ctx->args[i].length ? 1 : 0; + list[i].pgidx = i; + pages[i].addr = ctx->maps[i]->phys; + pages[i].size = ctx->maps[i]->size; + } + +bail: + if (err) + dev_err(dev, "Error: get invoke args failed:%d\n", err); + + return err; +} + +static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx, + u32 kernel) +{ + struct fastrpc_remote_arg *rpra = ctx->rpra; + int i, inbufs; + + inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); + + for (i = inbufs; i < ctx->nbufs; ++i) { + void *src = (void *)(uintptr_t)rpra[i].pv; + void *dst = (void *)(uintptr_t)ctx->args[i].ptr; + u64 len = rpra[i].len; + + if (!kernel) { + if (copy_to_user((void __user *)dst, src, len)) + return -EFAULT; + } else { + memcpy(dst, src, len); + } + } + + return 0; +} + +static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx, + struct fastrpc_invoke_ctx *ctx, + u32 kernel, uint32_t handle) +{ + struct fastrpc_channel_ctx *cctx; + struct fastrpc_user *fl = ctx->fl; + struct fastrpc_msg *msg = &ctx->msg; + + cctx = fl->cctx; + msg->pid = fl->tgid; + msg->tid = current->pid; + + if (kernel) + msg->pid = 0; + + msg->ctx = ctx->ctxid | fl->pd; + msg->handle = handle; + msg->sc = ctx->sc; + msg->addr = ctx->buf ? ctx->buf->phys : 0; + msg->size = roundup(ctx->msg_sz, PAGE_SIZE); + fastrpc_context_get(ctx); + + return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg)); +} + +static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel, + u32 handle, u32 sc, + struct fastrpc_invoke_args *args) +{ + struct fastrpc_invoke_ctx *ctx = NULL; + int err = 0; + + if (!fl->sctx) + return -EINVAL; + + ctx = fastrpc_context_alloc(fl, kernel, sc, args); + if (IS_ERR(ctx)) + return PTR_ERR(ctx); + + if (ctx->nscalars) { + err = fastrpc_get_args(kernel, ctx); + if (err) + goto bail; + } + /* Send invoke buffer to remote dsp */ + err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle); + if (err) + goto bail; + + /* Wait for remote dsp to respond or time out */ + err = wait_for_completion_interruptible(&ctx->work); + if (err) + goto bail; + + /* Check the response from remote dsp */ + err = ctx->retval; + if (err) + goto bail; + + if (ctx->nscalars) { + /* populate all the output buffers with results */ + err = fastrpc_put_args(ctx, kernel); + if (err) + goto bail; + } + +bail: + /* We are done with this compute context, remove it from pending list */ + spin_lock(&fl->lock); + list_del(&ctx->node); + spin_unlock(&fl->lock); + fastrpc_context_put(ctx); + + if (err) + dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err); + + return err; +} + static struct fastrpc_session_ctx *fastrpc_session_alloc( struct fastrpc_channel_ctx *cctx) { @@ -95,11 +719,26 @@ static int fastrpc_device_release(struct inode *inode, struct file *file) { struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; struct fastrpc_channel_ctx *cctx = fl->cctx; + struct fastrpc_invoke_ctx *ctx, *n; + struct fastrpc_map *map, *m; spin_lock(&cctx->lock); list_del(&fl->user); spin_unlock(&cctx->lock); + if (fl->init_mem) + fastrpc_buf_free(fl->init_mem); + + list_for_each_entry_safe(ctx, n, &fl->pending, node) { + list_del(&ctx->node); + fastrpc_context_put(ctx); + } + + list_for_each_entry_safe(map, m, &fl->maps, node) { + list_del(&map->node); + fastrpc_map_put(map); + } + fastrpc_session_free(cctx, fl->sctx); mutex_destroy(&fl->mutex); @@ -134,9 +773,60 @@ static int fastrpc_device_open(struct inode *inode, struct file *filp) return 0; } +static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp) +{ + struct fastrpc_invoke_args *args = NULL; + struct fastrpc_invoke inv; + u32 nscalars; + int err; + + if (copy_from_user(&inv, argp, sizeof(inv))) + return -EFAULT; + + /* nscalars is truncated here to max supported value */ + nscalars = REMOTE_SCALARS_LENGTH(inv.sc); + if (nscalars) { + args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL); + if (!args) + return -ENOMEM; + + if (copy_from_user(args, (void __user *)(uintptr_t)inv.args, + nscalars * sizeof(*args))) { + kfree(args); + return -EFAULT; + } + } + + err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args); + kfree(args); + + return err; +} + +static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data; + char __user *argp = (char __user *)arg; + int err; + + switch (cmd) { + case FASTRPC_IOCTL_INVOKE: + err = fastrpc_invoke(fl, argp); + break; + default: + err = -ENOTTY; + break; + } + + return err; +} + static const struct file_operations fastrpc_fops = { .open = fastrpc_device_open, .release = fastrpc_device_release, + .unlocked_ioctl = fastrpc_device_ioctl, + .compat_ioctl = fastrpc_device_ioctl, }; static int fastrpc_cb_probe(struct platform_device *pdev) @@ -260,9 +950,25 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev) return of_platform_populate(rdev->of_node, NULL, NULL, rdev); } +static void fastrpc_notify_users(struct fastrpc_user *user) +{ + struct fastrpc_invoke_ctx *ctx; + + spin_lock(&user->lock); + list_for_each_entry(ctx, &user->pending, node) + complete(&ctx->work); + spin_unlock(&user->lock); +} + static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) { struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); + struct fastrpc_user *user; + + spin_lock(&cctx->lock); + list_for_each_entry(user, &cctx->users, user) + fastrpc_notify_users(user); + spin_unlock(&cctx->lock); misc_deregister(&cctx->miscdev); of_platform_depopulate(&rpdev->dev); @@ -272,6 +978,30 @@ static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev) static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 addr) { + struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev); + struct fastrpc_invoke_rsp *rsp = data; + struct fastrpc_invoke_ctx *ctx; + unsigned long flags; + unsigned long ctxid; + + if (len < sizeof(*rsp)) + return -EINVAL; + + ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4); + + spin_lock_irqsave(&cctx->lock, flags); + ctx = idr_find(&cctx->ctx_idr, ctxid); + spin_unlock_irqrestore(&cctx->lock, flags); + + if (!ctx) { + dev_err(&rpdev->dev, "No context ID matches response\n"); + return -ENOENT; + } + + ctx->retval = rsp->retval; + complete(&ctx->work); + fastrpc_context_put(ctx); + return 0; } diff --git a/include/uapi/misc/fastrpc.h b/include/uapi/misc/fastrpc.h new file mode 100644 index 000000000000..a69ef33dc37e --- /dev/null +++ b/include/uapi/misc/fastrpc.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __QCOM_FASTRPC_H__ +#define __QCOM_FASTRPC_H__ + +#include <linux/types.h> + +#define FASTRPC_IOCTL_INVOKE _IOWR('R', 3, struct fastrpc_invoke) + +struct fastrpc_invoke_args { + __u64 ptr; + __u64 length; + __s32 fd; + __u32 reserved; +}; + +struct fastrpc_invoke { + __u32 handle; + __u32 sc; + __u64 args; +}; + +#endif /* __QCOM_FASTRPC_H__ */ |