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![Dmitry Baryshkov](/assets/img/avatar_default.png)
Verify that user applications are not using the kernel RPC message
handle to restrict them from directly attaching to guest OS on the
remote subsystem. This is a port of CVE-2019-2308 fix.
Fixes: c68cfb718c
("misc: fastrpc: Add support for context Invoke method")
Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Cc: Jonathan Marek <jonathan@marek.ca>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210212192658.3476137-1-dmitry.baryshkov@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1765 lines
40 KiB
C
1765 lines
40 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
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// Copyright (c) 2018, Linaro Limited
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/dma-buf.h>
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#include <linux/dma-mapping.h>
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#include <linux/idr.h>
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#include <linux/list.h>
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#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of.h>
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#include <linux/sort.h>
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#include <linux/of_platform.h>
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#include <linux/rpmsg.h>
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <uapi/misc/fastrpc.h>
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#define ADSP_DOMAIN_ID (0)
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#define MDSP_DOMAIN_ID (1)
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#define SDSP_DOMAIN_ID (2)
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#define CDSP_DOMAIN_ID (3)
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#define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/
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#define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/
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#define FASTRPC_ALIGN 128
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#define FASTRPC_MAX_FDLIST 16
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#define FASTRPC_MAX_CRCLIST 64
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#define FASTRPC_PHYS(p) ((p) & 0xffffffff)
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#define FASTRPC_CTX_MAX (256)
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#define FASTRPC_INIT_HANDLE 1
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#define FASTRPC_CTXID_MASK (0xFF0)
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#define INIT_FILELEN_MAX (2 * 1024 * 1024)
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#define FASTRPC_DEVICE_NAME "fastrpc"
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#define ADSP_MMAP_ADD_PAGES 0x1000
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/* Retrives number of input buffers from the scalars parameter */
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#define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
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/* Retrives number of output buffers from the scalars parameter */
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#define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff)
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/* Retrives number of input handles from the scalars parameter */
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#define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f)
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/* Retrives number of output handles from the scalars parameter */
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#define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f)
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#define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \
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REMOTE_SCALARS_OUTBUFS(sc) + \
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REMOTE_SCALARS_INHANDLES(sc)+ \
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REMOTE_SCALARS_OUTHANDLES(sc))
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#define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \
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(((attr & 0x07) << 29) | \
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((method & 0x1f) << 24) | \
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((in & 0xff) << 16) | \
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((out & 0xff) << 8) | \
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((oin & 0x0f) << 4) | \
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(oout & 0x0f))
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#define FASTRPC_SCALARS(method, in, out) \
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FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
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#define FASTRPC_CREATE_PROCESS_NARGS 6
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/* Remote Method id table */
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#define FASTRPC_RMID_INIT_ATTACH 0
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#define FASTRPC_RMID_INIT_RELEASE 1
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#define FASTRPC_RMID_INIT_MMAP 4
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#define FASTRPC_RMID_INIT_MUNMAP 5
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#define FASTRPC_RMID_INIT_CREATE 6
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#define FASTRPC_RMID_INIT_CREATE_ATTR 7
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#define FASTRPC_RMID_INIT_CREATE_STATIC 8
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/* Protection Domain(PD) ids */
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#define AUDIO_PD (0) /* also GUEST_OS PD? */
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#define USER_PD (1)
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#define SENSORS_PD (2)
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#define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev)
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static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp",
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"sdsp", "cdsp"};
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struct fastrpc_phy_page {
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u64 addr; /* physical address */
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u64 size; /* size of contiguous region */
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};
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struct fastrpc_invoke_buf {
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u32 num; /* number of contiguous regions */
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u32 pgidx; /* index to start of contiguous region */
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};
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struct fastrpc_remote_arg {
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u64 pv;
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u64 len;
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};
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struct fastrpc_mmap_rsp_msg {
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u64 vaddr;
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};
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struct fastrpc_mmap_req_msg {
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s32 pgid;
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u32 flags;
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u64 vaddr;
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s32 num;
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};
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struct fastrpc_munmap_req_msg {
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s32 pgid;
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u64 vaddr;
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u64 size;
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};
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struct fastrpc_msg {
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int pid; /* process group id */
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int tid; /* thread id */
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u64 ctx; /* invoke caller context */
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u32 handle; /* handle to invoke */
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u32 sc; /* scalars structure describing the data */
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u64 addr; /* physical address */
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u64 size; /* size of contiguous region */
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};
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struct fastrpc_invoke_rsp {
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u64 ctx; /* invoke caller context */
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int retval; /* invoke return value */
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};
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struct fastrpc_buf_overlap {
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u64 start;
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u64 end;
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int raix;
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u64 mstart;
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u64 mend;
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u64 offset;
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};
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struct fastrpc_buf {
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struct fastrpc_user *fl;
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struct dma_buf *dmabuf;
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struct device *dev;
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void *virt;
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u64 phys;
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u64 size;
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/* Lock for dma buf attachments */
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struct mutex lock;
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struct list_head attachments;
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/* mmap support */
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struct list_head node; /* list of user requested mmaps */
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uintptr_t raddr;
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};
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struct fastrpc_dma_buf_attachment {
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struct device *dev;
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struct sg_table sgt;
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struct list_head node;
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};
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struct fastrpc_map {
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struct list_head node;
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struct fastrpc_user *fl;
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int fd;
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struct dma_buf *buf;
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struct sg_table *table;
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struct dma_buf_attachment *attach;
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u64 phys;
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u64 size;
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void *va;
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u64 len;
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struct kref refcount;
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};
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struct fastrpc_invoke_ctx {
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int nscalars;
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int nbufs;
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int retval;
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int pid;
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int tgid;
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u32 sc;
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u32 *crc;
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u64 ctxid;
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u64 msg_sz;
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struct kref refcount;
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struct list_head node; /* list of ctxs */
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struct completion work;
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struct work_struct put_work;
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struct fastrpc_msg msg;
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struct fastrpc_user *fl;
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struct fastrpc_remote_arg *rpra;
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struct fastrpc_map **maps;
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struct fastrpc_buf *buf;
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struct fastrpc_invoke_args *args;
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struct fastrpc_buf_overlap *olaps;
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struct fastrpc_channel_ctx *cctx;
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};
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struct fastrpc_session_ctx {
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struct device *dev;
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int sid;
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bool used;
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bool valid;
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};
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struct fastrpc_channel_ctx {
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int domain_id;
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int sesscount;
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struct rpmsg_device *rpdev;
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struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS];
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spinlock_t lock;
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struct idr ctx_idr;
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struct list_head users;
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struct miscdevice miscdev;
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struct kref refcount;
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};
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struct fastrpc_user {
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struct list_head user;
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struct list_head maps;
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struct list_head pending;
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struct list_head mmaps;
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struct fastrpc_channel_ctx *cctx;
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struct fastrpc_session_ctx *sctx;
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struct fastrpc_buf *init_mem;
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int tgid;
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int pd;
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/* Lock for lists */
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spinlock_t lock;
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/* lock for allocations */
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struct mutex mutex;
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};
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static void fastrpc_free_map(struct kref *ref)
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{
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struct fastrpc_map *map;
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map = container_of(ref, struct fastrpc_map, refcount);
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if (map->table) {
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dma_buf_unmap_attachment(map->attach, map->table,
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DMA_BIDIRECTIONAL);
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dma_buf_detach(map->buf, map->attach);
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dma_buf_put(map->buf);
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}
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kfree(map);
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}
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static void fastrpc_map_put(struct fastrpc_map *map)
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{
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if (map)
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kref_put(&map->refcount, fastrpc_free_map);
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}
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static void fastrpc_map_get(struct fastrpc_map *map)
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{
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if (map)
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kref_get(&map->refcount);
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}
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static int fastrpc_map_find(struct fastrpc_user *fl, int fd,
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struct fastrpc_map **ppmap)
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{
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struct fastrpc_map *map = NULL;
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mutex_lock(&fl->mutex);
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list_for_each_entry(map, &fl->maps, node) {
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if (map->fd == fd) {
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fastrpc_map_get(map);
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*ppmap = map;
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mutex_unlock(&fl->mutex);
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return 0;
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}
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}
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mutex_unlock(&fl->mutex);
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return -ENOENT;
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}
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static void fastrpc_buf_free(struct fastrpc_buf *buf)
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{
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dma_free_coherent(buf->dev, buf->size, buf->virt,
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FASTRPC_PHYS(buf->phys));
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kfree(buf);
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}
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static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
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u64 size, struct fastrpc_buf **obuf)
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{
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struct fastrpc_buf *buf;
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buf = kzalloc(sizeof(*buf), GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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INIT_LIST_HEAD(&buf->attachments);
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INIT_LIST_HEAD(&buf->node);
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mutex_init(&buf->lock);
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buf->fl = fl;
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buf->virt = NULL;
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buf->phys = 0;
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buf->size = size;
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buf->dev = dev;
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buf->raddr = 0;
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buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys,
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GFP_KERNEL);
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if (!buf->virt) {
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mutex_destroy(&buf->lock);
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kfree(buf);
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return -ENOMEM;
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}
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if (fl->sctx && fl->sctx->sid)
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buf->phys += ((u64)fl->sctx->sid << 32);
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*obuf = buf;
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return 0;
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}
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static void fastrpc_channel_ctx_free(struct kref *ref)
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{
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struct fastrpc_channel_ctx *cctx;
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cctx = container_of(ref, struct fastrpc_channel_ctx, refcount);
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kfree(cctx);
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}
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static void fastrpc_channel_ctx_get(struct fastrpc_channel_ctx *cctx)
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{
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kref_get(&cctx->refcount);
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}
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static void fastrpc_channel_ctx_put(struct fastrpc_channel_ctx *cctx)
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{
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kref_put(&cctx->refcount, fastrpc_channel_ctx_free);
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}
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static void fastrpc_context_free(struct kref *ref)
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{
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struct fastrpc_invoke_ctx *ctx;
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struct fastrpc_channel_ctx *cctx;
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unsigned long flags;
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int i;
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ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount);
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cctx = ctx->cctx;
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for (i = 0; i < ctx->nscalars; i++)
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fastrpc_map_put(ctx->maps[i]);
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if (ctx->buf)
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fastrpc_buf_free(ctx->buf);
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spin_lock_irqsave(&cctx->lock, flags);
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idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);
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spin_unlock_irqrestore(&cctx->lock, flags);
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kfree(ctx->maps);
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kfree(ctx->olaps);
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kfree(ctx);
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fastrpc_channel_ctx_put(cctx);
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}
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static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
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{
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kref_get(&ctx->refcount);
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}
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static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
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{
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kref_put(&ctx->refcount, fastrpc_context_free);
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}
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static void fastrpc_context_put_wq(struct work_struct *work)
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{
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struct fastrpc_invoke_ctx *ctx =
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container_of(work, struct fastrpc_invoke_ctx, put_work);
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fastrpc_context_put(ctx);
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}
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#define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1)
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static int olaps_cmp(const void *a, const void *b)
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{
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struct fastrpc_buf_overlap *pa = (struct fastrpc_buf_overlap *)a;
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struct fastrpc_buf_overlap *pb = (struct fastrpc_buf_overlap *)b;
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/* sort with lowest starting buffer first */
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int st = CMP(pa->start, pb->start);
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/* sort with highest ending buffer first */
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int ed = CMP(pb->end, pa->end);
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return st == 0 ? ed : st;
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}
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static void fastrpc_get_buff_overlaps(struct fastrpc_invoke_ctx *ctx)
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{
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u64 max_end = 0;
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int i;
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for (i = 0; i < ctx->nbufs; ++i) {
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ctx->olaps[i].start = ctx->args[i].ptr;
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ctx->olaps[i].end = ctx->olaps[i].start + ctx->args[i].length;
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ctx->olaps[i].raix = i;
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}
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sort(ctx->olaps, ctx->nbufs, sizeof(*ctx->olaps), olaps_cmp, NULL);
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for (i = 0; i < ctx->nbufs; ++i) {
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/* Falling inside previous range */
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if (ctx->olaps[i].start < max_end) {
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ctx->olaps[i].mstart = max_end;
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ctx->olaps[i].mend = ctx->olaps[i].end;
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ctx->olaps[i].offset = max_end - ctx->olaps[i].start;
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if (ctx->olaps[i].end > max_end) {
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max_end = ctx->olaps[i].end;
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} else {
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ctx->olaps[i].mend = 0;
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ctx->olaps[i].mstart = 0;
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}
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} else {
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ctx->olaps[i].mend = ctx->olaps[i].end;
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ctx->olaps[i].mstart = ctx->olaps[i].start;
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ctx->olaps[i].offset = 0;
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max_end = ctx->olaps[i].end;
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}
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}
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}
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static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
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struct fastrpc_user *user, u32 kernel, u32 sc,
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struct fastrpc_invoke_args *args)
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{
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struct fastrpc_channel_ctx *cctx = user->cctx;
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struct fastrpc_invoke_ctx *ctx = NULL;
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unsigned long flags;
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int ret;
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ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return ERR_PTR(-ENOMEM);
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INIT_LIST_HEAD(&ctx->node);
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ctx->fl = user;
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ctx->nscalars = REMOTE_SCALARS_LENGTH(sc);
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ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) +
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REMOTE_SCALARS_OUTBUFS(sc);
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|
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if (ctx->nscalars) {
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ctx->maps = kcalloc(ctx->nscalars,
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sizeof(*ctx->maps), GFP_KERNEL);
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if (!ctx->maps) {
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kfree(ctx);
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return ERR_PTR(-ENOMEM);
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}
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ctx->olaps = kcalloc(ctx->nscalars,
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sizeof(*ctx->olaps), GFP_KERNEL);
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if (!ctx->olaps) {
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kfree(ctx->maps);
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kfree(ctx);
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return ERR_PTR(-ENOMEM);
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}
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ctx->args = args;
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fastrpc_get_buff_overlaps(ctx);
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}
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|
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/* Released in fastrpc_context_put() */
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fastrpc_channel_ctx_get(cctx);
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|
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ctx->sc = sc;
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ctx->retval = -1;
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ctx->pid = current->pid;
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ctx->tgid = user->tgid;
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ctx->cctx = cctx;
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init_completion(&ctx->work);
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INIT_WORK(&ctx->put_work, fastrpc_context_put_wq);
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spin_lock(&user->lock);
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list_add_tail(&ctx->node, &user->pending);
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spin_unlock(&user->lock);
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spin_lock_irqsave(&cctx->lock, flags);
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ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1,
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FASTRPC_CTX_MAX, GFP_ATOMIC);
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if (ret < 0) {
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spin_unlock_irqrestore(&cctx->lock, flags);
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goto err_idr;
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}
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ctx->ctxid = ret << 4;
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spin_unlock_irqrestore(&cctx->lock, flags);
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|
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kref_init(&ctx->refcount);
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return ctx;
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err_idr:
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spin_lock(&user->lock);
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list_del(&ctx->node);
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spin_unlock(&user->lock);
|
|
fastrpc_channel_ctx_put(cctx);
|
|
kfree(ctx->maps);
|
|
kfree(ctx->olaps);
|
|
kfree(ctx);
|
|
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
static struct sg_table *
|
|
fastrpc_map_dma_buf(struct dma_buf_attachment *attachment,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct fastrpc_dma_buf_attachment *a = attachment->priv;
|
|
struct sg_table *table;
|
|
int ret;
|
|
|
|
table = &a->sgt;
|
|
|
|
ret = dma_map_sgtable(attachment->dev, table, dir, 0);
|
|
if (ret)
|
|
table = ERR_PTR(ret);
|
|
return table;
|
|
}
|
|
|
|
static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach,
|
|
struct sg_table *table,
|
|
enum dma_data_direction dir)
|
|
{
|
|
dma_unmap_sgtable(attach->dev, table, dir, 0);
|
|
}
|
|
|
|
static void fastrpc_release(struct dma_buf *dmabuf)
|
|
{
|
|
struct fastrpc_buf *buffer = dmabuf->priv;
|
|
|
|
fastrpc_buf_free(buffer);
|
|
}
|
|
|
|
static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf,
|
|
struct dma_buf_attachment *attachment)
|
|
{
|
|
struct fastrpc_dma_buf_attachment *a;
|
|
struct fastrpc_buf *buffer = dmabuf->priv;
|
|
int ret;
|
|
|
|
a = kzalloc(sizeof(*a), GFP_KERNEL);
|
|
if (!a)
|
|
return -ENOMEM;
|
|
|
|
ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt,
|
|
FASTRPC_PHYS(buffer->phys), buffer->size);
|
|
if (ret < 0) {
|
|
dev_err(buffer->dev, "failed to get scatterlist from DMA API\n");
|
|
kfree(a);
|
|
return -EINVAL;
|
|
}
|
|
|
|
a->dev = attachment->dev;
|
|
INIT_LIST_HEAD(&a->node);
|
|
attachment->priv = a;
|
|
|
|
mutex_lock(&buffer->lock);
|
|
list_add(&a->node, &buffer->attachments);
|
|
mutex_unlock(&buffer->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
|
|
struct dma_buf_attachment *attachment)
|
|
{
|
|
struct fastrpc_dma_buf_attachment *a = attachment->priv;
|
|
struct fastrpc_buf *buffer = dmabuf->priv;
|
|
|
|
mutex_lock(&buffer->lock);
|
|
list_del(&a->node);
|
|
mutex_unlock(&buffer->lock);
|
|
sg_free_table(&a->sgt);
|
|
kfree(a);
|
|
}
|
|
|
|
static int fastrpc_vmap(struct dma_buf *dmabuf, struct dma_buf_map *map)
|
|
{
|
|
struct fastrpc_buf *buf = dmabuf->priv;
|
|
|
|
dma_buf_map_set_vaddr(map, buf->virt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fastrpc_mmap(struct dma_buf *dmabuf,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct fastrpc_buf *buf = dmabuf->priv;
|
|
size_t size = vma->vm_end - vma->vm_start;
|
|
|
|
return dma_mmap_coherent(buf->dev, vma, buf->virt,
|
|
FASTRPC_PHYS(buf->phys), size);
|
|
}
|
|
|
|
static const struct dma_buf_ops fastrpc_dma_buf_ops = {
|
|
.attach = fastrpc_dma_buf_attach,
|
|
.detach = fastrpc_dma_buf_detatch,
|
|
.map_dma_buf = fastrpc_map_dma_buf,
|
|
.unmap_dma_buf = fastrpc_unmap_dma_buf,
|
|
.mmap = fastrpc_mmap,
|
|
.vmap = fastrpc_vmap,
|
|
.release = fastrpc_release,
|
|
};
|
|
|
|
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 (IS_ERR(map->buf)) {
|
|
err = PTR_ERR(map->buf);
|
|
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) {
|
|
|
|
if (ctx->olaps[i].offset == 0)
|
|
size = ALIGN(size, FASTRPC_ALIGN);
|
|
|
|
size += (ctx->olaps[i].mend - ctx->olaps[i].mstart);
|
|
}
|
|
}
|
|
|
|
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, oix, err = 0;
|
|
u64 len, rlen, pkt_size;
|
|
u64 pg_start, pg_end;
|
|
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 (oix = 0; oix < ctx->nbufs; ++oix) {
|
|
int mlen;
|
|
|
|
i = ctx->olaps[oix].raix;
|
|
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;
|
|
|
|
if (ctx->maps[i]) {
|
|
struct vm_area_struct *vma = NULL;
|
|
|
|
rpra[i].pv = (u64) ctx->args[i].ptr;
|
|
pages[i].addr = ctx->maps[i]->phys;
|
|
|
|
vma = find_vma(current->mm, ctx->args[i].ptr);
|
|
if (vma)
|
|
pages[i].addr += ctx->args[i].ptr -
|
|
vma->vm_start;
|
|
|
|
pg_start = (ctx->args[i].ptr & PAGE_MASK) >> PAGE_SHIFT;
|
|
pg_end = ((ctx->args[i].ptr + len - 1) & PAGE_MASK) >>
|
|
PAGE_SHIFT;
|
|
pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
|
|
|
|
} else {
|
|
|
|
if (ctx->olaps[oix].offset == 0) {
|
|
rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
|
|
args = ALIGN(args, FASTRPC_ALIGN);
|
|
}
|
|
|
|
mlen = ctx->olaps[oix].mend - ctx->olaps[oix].mstart;
|
|
|
|
if (rlen < mlen)
|
|
goto bail;
|
|
|
|
rpra[i].pv = args - ctx->olaps[oix].offset;
|
|
pages[i].addr = ctx->buf->phys -
|
|
ctx->olaps[oix].offset +
|
|
(pkt_size - rlen);
|
|
pages[i].addr = pages[i].addr & PAGE_MASK;
|
|
|
|
pg_start = (args & PAGE_MASK) >> PAGE_SHIFT;
|
|
pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT;
|
|
pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE;
|
|
args = args + mlen;
|
|
rlen -= mlen;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
|
|
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);
|
|
|
|
ret = rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
|
|
|
|
if (ret)
|
|
fastrpc_context_put(ctx);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
if (!fl->cctx->rpdev)
|
|
return -EPIPE;
|
|
|
|
if (handle == FASTRPC_INIT_HANDLE && !kernel) {
|
|
dev_warn_ratelimited(fl->sctx->dev, "user app trying to send a kernel RPC message (%d)\n", handle);
|
|
return -EPERM;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
/* make sure that all CPU memory writes are seen by DSP */
|
|
dma_wmb();
|
|
/* Send invoke buffer to remote dsp */
|
|
err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
|
|
if (err)
|
|
goto bail;
|
|
|
|
if (kernel) {
|
|
if (!wait_for_completion_timeout(&ctx->work, 10 * HZ))
|
|
err = -ETIMEDOUT;
|
|
} else {
|
|
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) {
|
|
/* make sure that all memory writes by DSP are seen by CPU */
|
|
dma_rmb();
|
|
/* populate all the output buffers with results */
|
|
err = fastrpc_put_args(ctx, kernel);
|
|
if (err)
|
|
goto bail;
|
|
}
|
|
|
|
bail:
|
|
if (err != -ERESTARTSYS && err != -ETIMEDOUT) {
|
|
/* We are done with this compute context */
|
|
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 int fastrpc_init_create_process(struct fastrpc_user *fl,
|
|
char __user *argp)
|
|
{
|
|
struct fastrpc_init_create init;
|
|
struct fastrpc_invoke_args *args;
|
|
struct fastrpc_phy_page pages[1];
|
|
struct fastrpc_map *map = NULL;
|
|
struct fastrpc_buf *imem = NULL;
|
|
int memlen;
|
|
int err;
|
|
struct {
|
|
int pgid;
|
|
u32 namelen;
|
|
u32 filelen;
|
|
u32 pageslen;
|
|
u32 attrs;
|
|
u32 siglen;
|
|
} inbuf;
|
|
u32 sc;
|
|
|
|
args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
|
|
if (!args)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(&init, argp, sizeof(init))) {
|
|
err = -EFAULT;
|
|
goto err;
|
|
}
|
|
|
|
if (init.filelen > INIT_FILELEN_MAX) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
inbuf.pgid = fl->tgid;
|
|
inbuf.namelen = strlen(current->comm) + 1;
|
|
inbuf.filelen = init.filelen;
|
|
inbuf.pageslen = 1;
|
|
inbuf.attrs = init.attrs;
|
|
inbuf.siglen = init.siglen;
|
|
fl->pd = USER_PD;
|
|
|
|
if (init.filelen && init.filefd) {
|
|
err = fastrpc_map_create(fl, init.filefd, init.filelen, &map);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
|
|
1024 * 1024);
|
|
err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
|
|
&imem);
|
|
if (err)
|
|
goto err_alloc;
|
|
|
|
fl->init_mem = imem;
|
|
args[0].ptr = (u64)(uintptr_t)&inbuf;
|
|
args[0].length = sizeof(inbuf);
|
|
args[0].fd = -1;
|
|
|
|
args[1].ptr = (u64)(uintptr_t)current->comm;
|
|
args[1].length = inbuf.namelen;
|
|
args[1].fd = -1;
|
|
|
|
args[2].ptr = (u64) init.file;
|
|
args[2].length = inbuf.filelen;
|
|
args[2].fd = init.filefd;
|
|
|
|
pages[0].addr = imem->phys;
|
|
pages[0].size = imem->size;
|
|
|
|
args[3].ptr = (u64)(uintptr_t) pages;
|
|
args[3].length = 1 * sizeof(*pages);
|
|
args[3].fd = -1;
|
|
|
|
args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
|
|
args[4].length = sizeof(inbuf.attrs);
|
|
args[4].fd = -1;
|
|
|
|
args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
|
|
args[5].length = sizeof(inbuf.siglen);
|
|
args[5].fd = -1;
|
|
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
|
|
if (init.attrs)
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0);
|
|
|
|
err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
|
|
sc, args);
|
|
if (err)
|
|
goto err_invoke;
|
|
|
|
kfree(args);
|
|
|
|
return 0;
|
|
|
|
err_invoke:
|
|
fl->init_mem = NULL;
|
|
fastrpc_buf_free(imem);
|
|
err_alloc:
|
|
if (map) {
|
|
spin_lock(&fl->lock);
|
|
list_del(&map->node);
|
|
spin_unlock(&fl->lock);
|
|
fastrpc_map_put(map);
|
|
}
|
|
err:
|
|
kfree(args);
|
|
|
|
return err;
|
|
}
|
|
|
|
static struct fastrpc_session_ctx *fastrpc_session_alloc(
|
|
struct fastrpc_channel_ctx *cctx)
|
|
{
|
|
struct fastrpc_session_ctx *session = NULL;
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
for (i = 0; i < cctx->sesscount; i++) {
|
|
if (!cctx->session[i].used && cctx->session[i].valid) {
|
|
cctx->session[i].used = true;
|
|
session = &cctx->session[i];
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
|
|
return session;
|
|
}
|
|
|
|
static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
|
|
struct fastrpc_session_ctx *session)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
session->used = false;
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
}
|
|
|
|
static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
|
|
{
|
|
struct fastrpc_invoke_args args[1];
|
|
int tgid = 0;
|
|
u32 sc;
|
|
|
|
tgid = fl->tgid;
|
|
args[0].ptr = (u64)(uintptr_t) &tgid;
|
|
args[0].length = sizeof(tgid);
|
|
args[0].fd = -1;
|
|
args[0].reserved = 0;
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
|
|
|
|
return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
|
|
sc, &args[0]);
|
|
}
|
|
|
|
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;
|
|
struct fastrpc_buf *buf, *b;
|
|
unsigned long flags;
|
|
|
|
fastrpc_release_current_dsp_process(fl);
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
list_del(&fl->user);
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
|
|
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);
|
|
}
|
|
|
|
list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
|
|
list_del(&buf->node);
|
|
fastrpc_buf_free(buf);
|
|
}
|
|
|
|
fastrpc_session_free(cctx, fl->sctx);
|
|
fastrpc_channel_ctx_put(cctx);
|
|
|
|
mutex_destroy(&fl->mutex);
|
|
kfree(fl);
|
|
file->private_data = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fastrpc_device_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data);
|
|
struct fastrpc_user *fl = NULL;
|
|
unsigned long flags;
|
|
|
|
fl = kzalloc(sizeof(*fl), GFP_KERNEL);
|
|
if (!fl)
|
|
return -ENOMEM;
|
|
|
|
/* Released in fastrpc_device_release() */
|
|
fastrpc_channel_ctx_get(cctx);
|
|
|
|
filp->private_data = fl;
|
|
spin_lock_init(&fl->lock);
|
|
mutex_init(&fl->mutex);
|
|
INIT_LIST_HEAD(&fl->pending);
|
|
INIT_LIST_HEAD(&fl->maps);
|
|
INIT_LIST_HEAD(&fl->mmaps);
|
|
INIT_LIST_HEAD(&fl->user);
|
|
fl->tgid = current->tgid;
|
|
fl->cctx = cctx;
|
|
|
|
fl->sctx = fastrpc_session_alloc(cctx);
|
|
if (!fl->sctx) {
|
|
dev_err(&cctx->rpdev->dev, "No session available\n");
|
|
mutex_destroy(&fl->mutex);
|
|
kfree(fl);
|
|
|
|
return -EBUSY;
|
|
}
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
list_add_tail(&fl->user, &cctx->users);
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
|
|
{
|
|
struct fastrpc_alloc_dma_buf bp;
|
|
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
|
|
struct fastrpc_buf *buf = NULL;
|
|
int err;
|
|
|
|
if (copy_from_user(&bp, argp, sizeof(bp)))
|
|
return -EFAULT;
|
|
|
|
err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
|
|
if (err)
|
|
return err;
|
|
exp_info.ops = &fastrpc_dma_buf_ops;
|
|
exp_info.size = bp.size;
|
|
exp_info.flags = O_RDWR;
|
|
exp_info.priv = buf;
|
|
buf->dmabuf = dma_buf_export(&exp_info);
|
|
if (IS_ERR(buf->dmabuf)) {
|
|
err = PTR_ERR(buf->dmabuf);
|
|
fastrpc_buf_free(buf);
|
|
return err;
|
|
}
|
|
|
|
bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
|
|
if (bp.fd < 0) {
|
|
dma_buf_put(buf->dmabuf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (copy_to_user(argp, &bp, sizeof(bp))) {
|
|
dma_buf_put(buf->dmabuf);
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
|
|
{
|
|
struct fastrpc_invoke_args args[1];
|
|
int tgid = fl->tgid;
|
|
u32 sc;
|
|
|
|
args[0].ptr = (u64)(uintptr_t) &tgid;
|
|
args[0].length = sizeof(tgid);
|
|
args[0].fd = -1;
|
|
args[0].reserved = 0;
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
|
|
fl->pd = pd;
|
|
|
|
return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
|
|
sc, &args[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 int fastrpc_req_munmap_impl(struct fastrpc_user *fl,
|
|
struct fastrpc_req_munmap *req)
|
|
{
|
|
struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
|
|
struct fastrpc_buf *buf, *b;
|
|
struct fastrpc_munmap_req_msg req_msg;
|
|
struct device *dev = fl->sctx->dev;
|
|
int err;
|
|
u32 sc;
|
|
|
|
spin_lock(&fl->lock);
|
|
list_for_each_entry_safe(buf, b, &fl->mmaps, node) {
|
|
if ((buf->raddr == req->vaddrout) && (buf->size == req->size))
|
|
break;
|
|
buf = NULL;
|
|
}
|
|
spin_unlock(&fl->lock);
|
|
|
|
if (!buf) {
|
|
dev_err(dev, "mmap not in list\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
req_msg.pgid = fl->tgid;
|
|
req_msg.size = buf->size;
|
|
req_msg.vaddr = buf->raddr;
|
|
|
|
args[0].ptr = (u64) (uintptr_t) &req_msg;
|
|
args[0].length = sizeof(req_msg);
|
|
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
|
|
err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
|
|
&args[0]);
|
|
if (!err) {
|
|
dev_dbg(dev, "unmmap\tpt 0x%09lx OK\n", buf->raddr);
|
|
spin_lock(&fl->lock);
|
|
list_del(&buf->node);
|
|
spin_unlock(&fl->lock);
|
|
fastrpc_buf_free(buf);
|
|
} else {
|
|
dev_err(dev, "unmmap\tpt 0x%09lx ERROR\n", buf->raddr);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int fastrpc_req_munmap(struct fastrpc_user *fl, char __user *argp)
|
|
{
|
|
struct fastrpc_req_munmap req;
|
|
|
|
if (copy_from_user(&req, argp, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
return fastrpc_req_munmap_impl(fl, &req);
|
|
}
|
|
|
|
static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
|
|
{
|
|
struct fastrpc_invoke_args args[3] = { [0 ... 2] = { 0 } };
|
|
struct fastrpc_buf *buf = NULL;
|
|
struct fastrpc_mmap_req_msg req_msg;
|
|
struct fastrpc_mmap_rsp_msg rsp_msg;
|
|
struct fastrpc_req_munmap req_unmap;
|
|
struct fastrpc_phy_page pages;
|
|
struct fastrpc_req_mmap req;
|
|
struct device *dev = fl->sctx->dev;
|
|
int err;
|
|
u32 sc;
|
|
|
|
if (copy_from_user(&req, argp, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
if (req.flags != ADSP_MMAP_ADD_PAGES) {
|
|
dev_err(dev, "flag not supported 0x%x\n", req.flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (req.vaddrin) {
|
|
dev_err(dev, "adding user allocated pages is not supported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = fastrpc_buf_alloc(fl, fl->sctx->dev, req.size, &buf);
|
|
if (err) {
|
|
dev_err(dev, "failed to allocate buffer\n");
|
|
return err;
|
|
}
|
|
|
|
req_msg.pgid = fl->tgid;
|
|
req_msg.flags = req.flags;
|
|
req_msg.vaddr = req.vaddrin;
|
|
req_msg.num = sizeof(pages);
|
|
|
|
args[0].ptr = (u64) (uintptr_t) &req_msg;
|
|
args[0].length = sizeof(req_msg);
|
|
|
|
pages.addr = buf->phys;
|
|
pages.size = buf->size;
|
|
|
|
args[1].ptr = (u64) (uintptr_t) &pages;
|
|
args[1].length = sizeof(pages);
|
|
|
|
args[2].ptr = (u64) (uintptr_t) &rsp_msg;
|
|
args[2].length = sizeof(rsp_msg);
|
|
|
|
sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MMAP, 2, 1);
|
|
err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
|
|
&args[0]);
|
|
if (err) {
|
|
dev_err(dev, "mmap error (len 0x%08llx)\n", buf->size);
|
|
goto err_invoke;
|
|
}
|
|
|
|
/* update the buffer to be able to deallocate the memory on the DSP */
|
|
buf->raddr = (uintptr_t) rsp_msg.vaddr;
|
|
|
|
/* let the client know the address to use */
|
|
req.vaddrout = rsp_msg.vaddr;
|
|
|
|
spin_lock(&fl->lock);
|
|
list_add_tail(&buf->node, &fl->mmaps);
|
|
spin_unlock(&fl->lock);
|
|
|
|
if (copy_to_user((void __user *)argp, &req, sizeof(req))) {
|
|
/* unmap the memory and release the buffer */
|
|
req_unmap.vaddrout = buf->raddr;
|
|
req_unmap.size = buf->size;
|
|
fastrpc_req_munmap_impl(fl, &req_unmap);
|
|
return -EFAULT;
|
|
}
|
|
|
|
dev_dbg(dev, "mmap\t\tpt 0x%09lx OK [len 0x%08llx]\n",
|
|
buf->raddr, buf->size);
|
|
|
|
return 0;
|
|
|
|
err_invoke:
|
|
fastrpc_buf_free(buf);
|
|
|
|
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;
|
|
case FASTRPC_IOCTL_INIT_ATTACH:
|
|
err = fastrpc_init_attach(fl, AUDIO_PD);
|
|
break;
|
|
case FASTRPC_IOCTL_INIT_ATTACH_SNS:
|
|
err = fastrpc_init_attach(fl, SENSORS_PD);
|
|
break;
|
|
case FASTRPC_IOCTL_INIT_CREATE:
|
|
err = fastrpc_init_create_process(fl, argp);
|
|
break;
|
|
case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
|
|
err = fastrpc_dmabuf_alloc(fl, argp);
|
|
break;
|
|
case FASTRPC_IOCTL_MMAP:
|
|
err = fastrpc_req_mmap(fl, argp);
|
|
break;
|
|
case FASTRPC_IOCTL_MUNMAP:
|
|
err = fastrpc_req_munmap(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)
|
|
{
|
|
struct fastrpc_channel_ctx *cctx;
|
|
struct fastrpc_session_ctx *sess;
|
|
struct device *dev = &pdev->dev;
|
|
int i, sessions = 0;
|
|
unsigned long flags;
|
|
int rc;
|
|
|
|
cctx = dev_get_drvdata(dev->parent);
|
|
if (!cctx)
|
|
return -EINVAL;
|
|
|
|
of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
sess = &cctx->session[cctx->sesscount];
|
|
sess->used = false;
|
|
sess->valid = true;
|
|
sess->dev = dev;
|
|
dev_set_drvdata(dev, sess);
|
|
|
|
if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
|
|
dev_info(dev, "FastRPC Session ID not specified in DT\n");
|
|
|
|
if (sessions > 0) {
|
|
struct fastrpc_session_ctx *dup_sess;
|
|
|
|
for (i = 1; i < sessions; i++) {
|
|
if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS)
|
|
break;
|
|
dup_sess = &cctx->session[cctx->sesscount];
|
|
memcpy(dup_sess, sess, sizeof(*dup_sess));
|
|
}
|
|
}
|
|
cctx->sesscount++;
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
rc = dma_set_mask(dev, DMA_BIT_MASK(32));
|
|
if (rc) {
|
|
dev_err(dev, "32-bit DMA enable failed\n");
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fastrpc_cb_remove(struct platform_device *pdev)
|
|
{
|
|
struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
|
|
struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) {
|
|
if (cctx->session[i].sid == sess->sid) {
|
|
cctx->session[i].valid = false;
|
|
cctx->sesscount--;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id fastrpc_match_table[] = {
|
|
{ .compatible = "qcom,fastrpc-compute-cb", },
|
|
{}
|
|
};
|
|
|
|
static struct platform_driver fastrpc_cb_driver = {
|
|
.probe = fastrpc_cb_probe,
|
|
.remove = fastrpc_cb_remove,
|
|
.driver = {
|
|
.name = "qcom,fastrpc-cb",
|
|
.of_match_table = fastrpc_match_table,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
};
|
|
|
|
static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
|
|
{
|
|
struct device *rdev = &rpdev->dev;
|
|
struct fastrpc_channel_ctx *data;
|
|
int i, err, domain_id = -1;
|
|
const char *domain;
|
|
|
|
err = of_property_read_string(rdev->of_node, "label", &domain);
|
|
if (err) {
|
|
dev_info(rdev, "FastRPC Domain not specified in DT\n");
|
|
return err;
|
|
}
|
|
|
|
for (i = 0; i <= CDSP_DOMAIN_ID; i++) {
|
|
if (!strcmp(domains[i], domain)) {
|
|
domain_id = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (domain_id < 0) {
|
|
dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->miscdev.minor = MISC_DYNAMIC_MINOR;
|
|
data->miscdev.name = devm_kasprintf(rdev, GFP_KERNEL, "fastrpc-%s",
|
|
domains[domain_id]);
|
|
data->miscdev.fops = &fastrpc_fops;
|
|
err = misc_register(&data->miscdev);
|
|
if (err) {
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
kref_init(&data->refcount);
|
|
|
|
dev_set_drvdata(&rpdev->dev, data);
|
|
dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
|
|
INIT_LIST_HEAD(&data->users);
|
|
spin_lock_init(&data->lock);
|
|
idr_init(&data->ctx_idr);
|
|
data->domain_id = domain_id;
|
|
data->rpdev = 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;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cctx->lock, flags);
|
|
list_for_each_entry(user, &cctx->users, user)
|
|
fastrpc_notify_users(user);
|
|
spin_unlock_irqrestore(&cctx->lock, flags);
|
|
|
|
misc_deregister(&cctx->miscdev);
|
|
of_platform_depopulate(&rpdev->dev);
|
|
|
|
cctx->rpdev = NULL;
|
|
fastrpc_channel_ctx_put(cctx);
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* The DMA buffer associated with the context cannot be freed in
|
|
* interrupt context so schedule it through a worker thread to
|
|
* avoid a kernel BUG.
|
|
*/
|
|
schedule_work(&ctx->put_work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id fastrpc_rpmsg_of_match[] = {
|
|
{ .compatible = "qcom,fastrpc" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
|
|
|
|
static struct rpmsg_driver fastrpc_driver = {
|
|
.probe = fastrpc_rpmsg_probe,
|
|
.remove = fastrpc_rpmsg_remove,
|
|
.callback = fastrpc_rpmsg_callback,
|
|
.drv = {
|
|
.name = "qcom,fastrpc",
|
|
.of_match_table = fastrpc_rpmsg_of_match,
|
|
},
|
|
};
|
|
|
|
static int fastrpc_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&fastrpc_cb_driver);
|
|
if (ret < 0) {
|
|
pr_err("fastrpc: failed to register cb driver\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = register_rpmsg_driver(&fastrpc_driver);
|
|
if (ret < 0) {
|
|
pr_err("fastrpc: failed to register rpmsg driver\n");
|
|
platform_driver_unregister(&fastrpc_cb_driver);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
module_init(fastrpc_init);
|
|
|
|
static void fastrpc_exit(void)
|
|
{
|
|
platform_driver_unregister(&fastrpc_cb_driver);
|
|
unregister_rpmsg_driver(&fastrpc_driver);
|
|
}
|
|
module_exit(fastrpc_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|