| /* |
| * Copyright (c) 2012-2017, The Linux Foundation. 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. |
| * |
| */ |
| #include <linux/dma-buf.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/slab.h> |
| #include <linux/completion.h> |
| #include <linux/pagemap.h> |
| #include <linux/mm.h> |
| #include <linux/fs.h> |
| #include <linux/sched.h> |
| #include <linux/module.h> |
| #include <linux/cdev.h> |
| #include <linux/list.h> |
| #include <linux/hash.h> |
| #include <linux/msm_ion.h> |
| #include <soc/qcom/secure_buffer.h> |
| #include <soc/qcom/glink.h> |
| #include <soc/qcom/subsystem_notif.h> |
| #include <soc/qcom/subsystem_restart.h> |
| #include <linux/scatterlist.h> |
| #include <linux/fs.h> |
| #include <linux/uaccess.h> |
| #include <linux/device.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/dma-contiguous.h> |
| #include <linux/cma.h> |
| #include <linux/iommu.h> |
| #include <linux/kref.h> |
| #include <linux/sort.h> |
| #include <linux/msm_dma_iommu_mapping.h> |
| #include <asm/dma-iommu.h> |
| #include "adsprpc_compat.h" |
| #include "adsprpc_shared.h" |
| #include <linux/debugfs.h> |
| |
| #define TZ_PIL_PROTECT_MEM_SUBSYS_ID 0x0C |
| #define TZ_PIL_CLEAR_PROTECT_MEM_SUBSYS_ID 0x0D |
| #define TZ_PIL_AUTH_QDSP6_PROC 1 |
| #define FASTRPC_ENOSUCH 39 |
| #define VMID_SSC_Q6 5 |
| #define VMID_ADSP_Q6 6 |
| #define DEBUGFS_SIZE 1024 |
| |
| #define RPC_TIMEOUT (5 * HZ) |
| #define BALIGN 128 |
| #define NUM_CHANNELS 4 /* adsp, mdsp, slpi, cdsp*/ |
| #define NUM_SESSIONS 9 /*8 compute, 1 cpz*/ |
| #define M_FDLIST (16) |
| #define M_CRCLIST (64) |
| |
| #define IS_CACHE_ALIGNED(x) (((x) & ((L1_CACHE_BYTES)-1)) == 0) |
| |
| #define FASTRPC_LINK_STATE_DOWN (0x0) |
| #define FASTRPC_LINK_STATE_UP (0x1) |
| #define FASTRPC_LINK_DISCONNECTED (0x0) |
| #define FASTRPC_LINK_CONNECTING (0x1) |
| #define FASTRPC_LINK_CONNECTED (0x3) |
| #define FASTRPC_LINK_DISCONNECTING (0x7) |
| |
| #define PERF_KEYS "count:flush:map:copy:glink:getargs:putargs:invalidate:invoke" |
| #define FASTRPC_STATIC_HANDLE_LISTENER (3) |
| #define FASTRPC_STATIC_HANDLE_MAX (20) |
| |
| #define PERF_END (void)0 |
| |
| #define PERF(enb, cnt, ff) \ |
| {\ |
| struct timespec startT = {0};\ |
| if (enb) {\ |
| getnstimeofday(&startT);\ |
| } \ |
| ff ;\ |
| if (enb) {\ |
| cnt += getnstimediff(&startT);\ |
| } \ |
| } |
| |
| static int fastrpc_glink_open(int cid); |
| static void fastrpc_glink_close(void *chan, int cid); |
| static struct dentry *debugfs_root; |
| static struct dentry *debugfs_global_file; |
| |
| static inline uint64_t buf_page_start(uint64_t buf) |
| { |
| uint64_t start = (uint64_t) buf & PAGE_MASK; |
| return start; |
| } |
| |
| static inline uint64_t buf_page_offset(uint64_t buf) |
| { |
| uint64_t offset = (uint64_t) buf & (PAGE_SIZE - 1); |
| return offset; |
| } |
| |
| static inline int buf_num_pages(uint64_t buf, ssize_t len) |
| { |
| uint64_t start = buf_page_start(buf) >> PAGE_SHIFT; |
| uint64_t end = (((uint64_t) buf + len - 1) & PAGE_MASK) >> PAGE_SHIFT; |
| int nPages = end - start + 1; |
| return nPages; |
| } |
| |
| static inline uint64_t buf_page_size(uint32_t size) |
| { |
| uint64_t sz = (size + (PAGE_SIZE - 1)) & PAGE_MASK; |
| |
| return sz > PAGE_SIZE ? sz : PAGE_SIZE; |
| } |
| |
| static inline void *uint64_to_ptr(uint64_t addr) |
| { |
| void *ptr = (void *)((uintptr_t)addr); |
| |
| return ptr; |
| } |
| |
| static inline uint64_t ptr_to_uint64(void *ptr) |
| { |
| uint64_t addr = (uint64_t)((uintptr_t)ptr); |
| |
| return addr; |
| } |
| |
| struct fastrpc_file; |
| |
| struct fastrpc_buf { |
| struct hlist_node hn; |
| struct fastrpc_file *fl; |
| void *virt; |
| uint64_t phys; |
| ssize_t size; |
| }; |
| |
| struct fastrpc_ctx_lst; |
| |
| struct overlap { |
| uintptr_t start; |
| uintptr_t end; |
| int raix; |
| uintptr_t mstart; |
| uintptr_t mend; |
| uintptr_t offset; |
| }; |
| |
| struct smq_invoke_ctx { |
| struct hlist_node hn; |
| struct completion work; |
| int retval; |
| int pid; |
| int tgid; |
| remote_arg_t *lpra; |
| remote_arg64_t *rpra; |
| int *fds; |
| unsigned int *attrs; |
| struct fastrpc_mmap **maps; |
| struct fastrpc_buf *buf; |
| ssize_t used; |
| struct fastrpc_file *fl; |
| uint32_t sc; |
| struct overlap *overs; |
| struct overlap **overps; |
| struct smq_msg msg; |
| uint32_t *crc; |
| }; |
| |
| struct fastrpc_ctx_lst { |
| struct hlist_head pending; |
| struct hlist_head interrupted; |
| }; |
| |
| struct fastrpc_smmu { |
| struct dma_iommu_mapping *mapping; |
| int cb; |
| int enabled; |
| int faults; |
| int secure; |
| int coherent; |
| }; |
| |
| struct fastrpc_session_ctx { |
| struct device *dev; |
| struct fastrpc_smmu smmu; |
| int used; |
| }; |
| |
| struct fastrpc_glink_info { |
| int link_state; |
| int port_state; |
| struct glink_open_config cfg; |
| struct glink_link_info link_info; |
| void *link_notify_handle; |
| }; |
| |
| struct fastrpc_channel_ctx { |
| char *name; |
| char *subsys; |
| void *chan; |
| struct device *dev; |
| struct fastrpc_session_ctx session[NUM_SESSIONS]; |
| struct completion work; |
| struct completion workport; |
| struct notifier_block nb; |
| struct kref kref; |
| int sesscount; |
| int ssrcount; |
| void *handle; |
| int prevssrcount; |
| int vmid; |
| struct fastrpc_glink_info link; |
| }; |
| |
| struct fastrpc_apps { |
| struct fastrpc_channel_ctx *channel; |
| struct cdev cdev; |
| struct class *class; |
| struct mutex smd_mutex; |
| struct smq_phy_page range; |
| struct hlist_head maps; |
| dev_t dev_no; |
| int compat; |
| struct hlist_head drivers; |
| spinlock_t hlock; |
| struct ion_client *client; |
| struct device *dev; |
| }; |
| |
| struct fastrpc_mmap { |
| struct hlist_node hn; |
| struct fastrpc_file *fl; |
| struct fastrpc_apps *apps; |
| int fd; |
| uint32_t flags; |
| struct dma_buf *buf; |
| struct sg_table *table; |
| struct dma_buf_attachment *attach; |
| struct ion_handle *handle; |
| uint64_t phys; |
| ssize_t size; |
| uintptr_t va; |
| ssize_t len; |
| int refs; |
| uintptr_t raddr; |
| int uncached; |
| int secure; |
| uintptr_t attr; |
| }; |
| |
| struct fastrpc_perf { |
| int64_t count; |
| int64_t flush; |
| int64_t map; |
| int64_t copy; |
| int64_t link; |
| int64_t getargs; |
| int64_t putargs; |
| int64_t invargs; |
| int64_t invoke; |
| }; |
| |
| struct fastrpc_file { |
| struct hlist_node hn; |
| spinlock_t hlock; |
| struct hlist_head maps; |
| struct hlist_head bufs; |
| struct fastrpc_ctx_lst clst; |
| struct fastrpc_session_ctx *sctx; |
| struct fastrpc_session_ctx *secsctx; |
| uint32_t mode; |
| uint32_t profile; |
| int tgid; |
| int cid; |
| int ssrcount; |
| int pd; |
| struct fastrpc_apps *apps; |
| struct fastrpc_perf perf; |
| struct dentry *debugfs_file; |
| }; |
| |
| static struct fastrpc_apps gfa; |
| |
| static struct fastrpc_channel_ctx gcinfo[NUM_CHANNELS] = { |
| { |
| .name = "adsprpc-smd", |
| .subsys = "adsp", |
| .link.link_info.edge = "lpass", |
| .link.link_info.transport = "smem", |
| }, |
| { |
| .name = "mdsprpc-smd", |
| .subsys = "modem", |
| .link.link_info.edge = "mpss", |
| .link.link_info.transport = "smem", |
| }, |
| { |
| .name = "sdsprpc-smd", |
| .subsys = "slpi", |
| .link.link_info.edge = "dsps", |
| .link.link_info.transport = "smem", |
| }, |
| { |
| .name = "cdsprpc-smd", |
| .subsys = "cdsp", |
| .link.link_info.edge = "cdsp", |
| .link.link_info.transport = "smem", |
| }, |
| }; |
| |
| static inline int64_t getnstimediff(struct timespec *start) |
| { |
| int64_t ns; |
| struct timespec ts, b; |
| |
| getnstimeofday(&ts); |
| b = timespec_sub(ts, *start); |
| ns = timespec_to_ns(&b); |
| return ns; |
| } |
| |
| static void fastrpc_buf_free(struct fastrpc_buf *buf, int cache) |
| { |
| struct fastrpc_file *fl = buf == 0 ? 0 : buf->fl; |
| int vmid; |
| |
| if (!fl) |
| return; |
| if (cache) { |
| spin_lock(&fl->hlock); |
| hlist_add_head(&buf->hn, &fl->bufs); |
| spin_unlock(&fl->hlock); |
| return; |
| } |
| if (!IS_ERR_OR_NULL(buf->virt)) { |
| int destVM[1] = {VMID_HLOS}; |
| int destVMperm[1] = {PERM_READ | PERM_WRITE | PERM_EXEC}; |
| |
| if (fl->sctx->smmu.cb) |
| buf->phys &= ~((uint64_t)fl->sctx->smmu.cb << 32); |
| vmid = fl->apps->channel[fl->cid].vmid; |
| if (vmid) { |
| int srcVM[2] = {VMID_HLOS, vmid}; |
| |
| hyp_assign_phys(buf->phys, buf_page_size(buf->size), |
| srcVM, 2, destVM, destVMperm, 1); |
| } |
| dma_free_coherent(fl->sctx->dev, buf->size, buf->virt, |
| buf->phys); |
| } |
| kfree(buf); |
| } |
| |
| static void fastrpc_buf_list_free(struct fastrpc_file *fl) |
| { |
| struct fastrpc_buf *buf, *free; |
| |
| do { |
| struct hlist_node *n; |
| |
| free = 0; |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(buf, n, &fl->bufs, hn) { |
| hlist_del_init(&buf->hn); |
| free = buf; |
| break; |
| } |
| spin_unlock(&fl->hlock); |
| if (free) |
| fastrpc_buf_free(free, 0); |
| } while (free); |
| } |
| |
| static void fastrpc_mmap_add(struct fastrpc_mmap *map) |
| { |
| struct fastrpc_file *fl = map->fl; |
| |
| spin_lock(&fl->hlock); |
| hlist_add_head(&map->hn, &fl->maps); |
| spin_unlock(&fl->hlock); |
| } |
| |
| static int fastrpc_mmap_find(struct fastrpc_file *fl, int fd, uintptr_t va, |
| ssize_t len, int mflags, int refs, struct fastrpc_mmap **ppmap) |
| { |
| struct fastrpc_mmap *match = 0, *map; |
| struct hlist_node *n; |
| |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(map, n, &fl->maps, hn) { |
| if (va >= map->va && |
| va + len <= map->va + map->len && |
| map->fd == fd) { |
| if (refs) |
| map->refs++; |
| match = map; |
| break; |
| } |
| } |
| spin_unlock(&fl->hlock); |
| if (match) { |
| *ppmap = match; |
| return 0; |
| } |
| return -ENOTTY; |
| } |
| |
| static int fastrpc_mmap_remove(struct fastrpc_file *fl, uintptr_t va, |
| ssize_t len, struct fastrpc_mmap **ppmap) |
| { |
| struct fastrpc_mmap *match = 0, *map; |
| struct hlist_node *n; |
| struct fastrpc_apps *me = &gfa; |
| |
| spin_lock(&me->hlock); |
| hlist_for_each_entry_safe(map, n, &me->maps, hn) { |
| if (map->raddr == va && |
| map->raddr + map->len == va + len && |
| map->refs == 1) { |
| match = map; |
| hlist_del_init(&map->hn); |
| break; |
| } |
| } |
| spin_unlock(&me->hlock); |
| if (match) { |
| *ppmap = match; |
| return 0; |
| } |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(map, n, &fl->maps, hn) { |
| if (map->raddr == va && |
| map->raddr + map->len == va + len && |
| map->refs == 1) { |
| match = map; |
| hlist_del_init(&map->hn); |
| break; |
| } |
| } |
| spin_unlock(&fl->hlock); |
| if (match) { |
| *ppmap = match; |
| return 0; |
| } |
| return -ENOTTY; |
| } |
| |
| static void fastrpc_mmap_free(struct fastrpc_mmap *map) |
| { |
| struct fastrpc_file *fl; |
| int vmid; |
| struct fastrpc_session_ctx *sess; |
| int destVM[1] = {VMID_HLOS}; |
| int destVMperm[1] = {PERM_READ | PERM_WRITE | PERM_EXEC}; |
| |
| if (!map) |
| return; |
| fl = map->fl; |
| spin_lock(&fl->hlock); |
| map->refs--; |
| if (!map->refs) |
| hlist_del_init(&map->hn); |
| spin_unlock(&fl->hlock); |
| if (map->refs > 0) |
| return; |
| if (map->secure) |
| sess = fl->secsctx; |
| else |
| sess = fl->sctx; |
| |
| if (!IS_ERR_OR_NULL(map->handle)) |
| ion_free(fl->apps->client, map->handle); |
| if (sess->smmu.enabled) { |
| if (map->size || map->phys) |
| msm_dma_unmap_sg(sess->dev, |
| map->table->sgl, |
| map->table->nents, DMA_BIDIRECTIONAL, |
| map->buf); |
| } |
| vmid = fl->apps->channel[fl->cid].vmid; |
| if (vmid && map->phys) { |
| int srcVM[2] = {VMID_HLOS, vmid}; |
| |
| hyp_assign_phys(map->phys, buf_page_size(map->size), |
| srcVM, 2, destVM, destVMperm, 1); |
| } |
| |
| if (!IS_ERR_OR_NULL(map->table)) |
| dma_buf_unmap_attachment(map->attach, map->table, |
| DMA_BIDIRECTIONAL); |
| if (!IS_ERR_OR_NULL(map->attach)) |
| dma_buf_detach(map->buf, map->attach); |
| if (!IS_ERR_OR_NULL(map->buf)) |
| dma_buf_put(map->buf); |
| kfree(map); |
| } |
| |
| static int fastrpc_session_alloc(struct fastrpc_channel_ctx *chan, int secure, |
| struct fastrpc_session_ctx **session); |
| |
| static int fastrpc_mmap_create(struct fastrpc_file *fl, int fd, |
| unsigned int attr, uintptr_t va, ssize_t len, int mflags, |
| struct fastrpc_mmap **ppmap) |
| { |
| struct fastrpc_session_ctx *sess; |
| struct fastrpc_apps *apps = fl->apps; |
| int cid = fl->cid; |
| struct fastrpc_channel_ctx *chan = &apps->channel[cid]; |
| struct fastrpc_mmap *map = 0; |
| unsigned long attrs; |
| unsigned long flags; |
| int err = 0, vmid; |
| |
| if (!fastrpc_mmap_find(fl, fd, va, len, mflags, 1, ppmap)) |
| return 0; |
| map = kzalloc(sizeof(*map), GFP_KERNEL); |
| VERIFY(err, !IS_ERR_OR_NULL(map)); |
| if (err) |
| goto bail; |
| INIT_HLIST_NODE(&map->hn); |
| map->flags = mflags; |
| map->refs = 1; |
| map->fl = fl; |
| map->fd = fd; |
| map->attr = attr; |
| VERIFY(err, !IS_ERR_OR_NULL(map->handle = |
| ion_import_dma_buf_fd(fl->apps->client, fd))); |
| if (err) |
| goto bail; |
| VERIFY(err, !ion_handle_get_flags(fl->apps->client, map->handle, |
| &flags)); |
| if (err) |
| goto bail; |
| |
| map->uncached = !ION_IS_CACHED(flags); |
| if (map->attr & FASTRPC_ATTR_NOVA) |
| map->uncached = 1; |
| |
| map->secure = flags & ION_FLAG_SECURE; |
| if (map->secure) { |
| if (!fl->secsctx) |
| err = fastrpc_session_alloc(chan, 1, |
| &fl->secsctx); |
| if (err) |
| goto bail; |
| } |
| if (map->secure) |
| sess = fl->secsctx; |
| else |
| sess = fl->sctx; |
| |
| VERIFY(err, !IS_ERR_OR_NULL(map->buf = dma_buf_get(fd))); |
| if (err) |
| goto bail; |
| VERIFY(err, !IS_ERR_OR_NULL(map->attach = |
| dma_buf_attach(map->buf, sess->dev))); |
| if (err) |
| goto bail; |
| VERIFY(err, !IS_ERR_OR_NULL(map->table = |
| dma_buf_map_attachment(map->attach, |
| DMA_BIDIRECTIONAL))); |
| if (err) |
| goto bail; |
| if (sess->smmu.enabled) { |
| attrs = DMA_ATTR_EXEC_MAPPING; |
| |
| if (map->attr & FASTRPC_ATTR_NON_COHERENT || |
| (sess->smmu.coherent && map->uncached)) |
| attrs |= DMA_ATTR_FORCE_NON_COHERENT; |
| else if (map->attr & FASTRPC_ATTR_COHERENT) |
| attrs |= DMA_ATTR_FORCE_COHERENT; |
| |
| VERIFY(err, map->table->nents == |
| msm_dma_map_sg_attrs(sess->dev, |
| map->table->sgl, map->table->nents, |
| DMA_BIDIRECTIONAL, map->buf, attrs)); |
| if (err) |
| goto bail; |
| } else { |
| VERIFY(err, map->table->nents == 1); |
| if (err) |
| goto bail; |
| } |
| map->phys = sg_dma_address(map->table->sgl); |
| if (sess->smmu.cb) { |
| map->phys += ((uint64_t)sess->smmu.cb << 32); |
| map->size = sg_dma_len(map->table->sgl); |
| } else { |
| map->size = buf_page_size(len); |
| } |
| vmid = fl->apps->channel[fl->cid].vmid; |
| if (vmid) { |
| int srcVM[1] = {VMID_HLOS}; |
| int destVM[2] = {VMID_HLOS, vmid}; |
| int destVMperm[2] = {PERM_READ | PERM_WRITE, |
| PERM_READ | PERM_WRITE | PERM_EXEC}; |
| |
| VERIFY(err, !hyp_assign_phys(map->phys, |
| buf_page_size(map->size), |
| srcVM, 1, destVM, destVMperm, 2)); |
| if (err) |
| goto bail; |
| } |
| map->va = va; |
| map->len = len; |
| |
| fastrpc_mmap_add(map); |
| *ppmap = map; |
| |
| bail: |
| if (err && map) |
| fastrpc_mmap_free(map); |
| return err; |
| } |
| |
| static int fastrpc_buf_alloc(struct fastrpc_file *fl, ssize_t size, |
| struct fastrpc_buf **obuf) |
| { |
| int err = 0, vmid; |
| struct fastrpc_buf *buf = 0, *fr = 0; |
| struct hlist_node *n; |
| |
| VERIFY(err, size > 0); |
| if (err) |
| goto bail; |
| |
| /* find the smallest buffer that fits in the cache */ |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(buf, n, &fl->bufs, hn) { |
| if (buf->size >= size && (!fr || fr->size > buf->size)) |
| fr = buf; |
| } |
| if (fr) |
| hlist_del_init(&fr->hn); |
| spin_unlock(&fl->hlock); |
| if (fr) { |
| *obuf = fr; |
| return 0; |
| } |
| buf = 0; |
| VERIFY(err, buf = kzalloc(sizeof(*buf), GFP_KERNEL)); |
| if (err) |
| goto bail; |
| INIT_HLIST_NODE(&buf->hn); |
| buf->fl = fl; |
| buf->virt = 0; |
| buf->phys = 0; |
| buf->size = size; |
| buf->virt = dma_alloc_coherent(fl->sctx->dev, buf->size, |
| (void *)&buf->phys, GFP_KERNEL); |
| if (IS_ERR_OR_NULL(buf->virt)) { |
| /* free cache and retry */ |
| fastrpc_buf_list_free(fl); |
| buf->virt = dma_alloc_coherent(fl->sctx->dev, buf->size, |
| (void *)&buf->phys, GFP_KERNEL); |
| VERIFY(err, !IS_ERR_OR_NULL(buf->virt)); |
| } |
| if (err) |
| goto bail; |
| if (fl->sctx->smmu.cb) |
| buf->phys += ((uint64_t)fl->sctx->smmu.cb << 32); |
| vmid = fl->apps->channel[fl->cid].vmid; |
| if (vmid) { |
| int srcVM[1] = {VMID_HLOS}; |
| int destVM[2] = {VMID_HLOS, vmid}; |
| int destVMperm[2] = {PERM_READ | PERM_WRITE, |
| PERM_READ | PERM_WRITE | PERM_EXEC}; |
| |
| VERIFY(err, !hyp_assign_phys(buf->phys, buf_page_size(size), |
| srcVM, 1, destVM, destVMperm, 2)); |
| if (err) |
| goto bail; |
| } |
| |
| *obuf = buf; |
| bail: |
| if (err && buf) |
| fastrpc_buf_free(buf, 0); |
| return err; |
| } |
| |
| |
| static int context_restore_interrupted(struct fastrpc_file *fl, |
| struct fastrpc_ioctl_invoke_crc *inv, |
| struct smq_invoke_ctx **po) |
| { |
| int err = 0; |
| struct smq_invoke_ctx *ctx = 0, *ictx = 0; |
| struct hlist_node *n; |
| struct fastrpc_ioctl_invoke *invoke = &inv->inv; |
| |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(ictx, n, &fl->clst.interrupted, hn) { |
| if (ictx->pid == current->pid) { |
| if (invoke->sc != ictx->sc || ictx->fl != fl) |
| err = -1; |
| else { |
| ctx = ictx; |
| hlist_del_init(&ctx->hn); |
| hlist_add_head(&ctx->hn, &fl->clst.pending); |
| } |
| break; |
| } |
| } |
| spin_unlock(&fl->hlock); |
| if (ctx) |
| *po = ctx; |
| return err; |
| } |
| |
| #define CMP(aa, bb) ((aa) == (bb) ? 0 : (aa) < (bb) ? -1 : 1) |
| static int overlap_ptr_cmp(const void *a, const void *b) |
| { |
| struct overlap *pa = *((struct overlap **)a); |
| struct overlap *pb = *((struct overlap **)b); |
| /* sort with lowest starting buffer first */ |
| int st = CMP(pa->start, pb->start); |
| /* sort with highest ending buffer first */ |
| int ed = CMP(pb->end, pa->end); |
| return st == 0 ? ed : st; |
| } |
| |
| static int context_build_overlap(struct smq_invoke_ctx *ctx) |
| { |
| int i, err = 0; |
| remote_arg_t *lpra = ctx->lpra; |
| int inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); |
| int outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); |
| int nbufs = inbufs + outbufs; |
| struct overlap max; |
| |
| for (i = 0; i < nbufs; ++i) { |
| ctx->overs[i].start = (uintptr_t)lpra[i].buf.pv; |
| ctx->overs[i].end = ctx->overs[i].start + lpra[i].buf.len; |
| if (lpra[i].buf.len) { |
| VERIFY(err, ctx->overs[i].end > ctx->overs[i].start); |
| if (err) |
| goto bail; |
| } |
| ctx->overs[i].raix = i; |
| ctx->overps[i] = &ctx->overs[i]; |
| } |
| sort(ctx->overps, nbufs, sizeof(*ctx->overps), overlap_ptr_cmp, 0); |
| max.start = 0; |
| max.end = 0; |
| for (i = 0; i < nbufs; ++i) { |
| if (ctx->overps[i]->start < max.end) { |
| ctx->overps[i]->mstart = max.end; |
| ctx->overps[i]->mend = ctx->overps[i]->end; |
| ctx->overps[i]->offset = max.end - |
| ctx->overps[i]->start; |
| if (ctx->overps[i]->end > max.end) { |
| max.end = ctx->overps[i]->end; |
| } else { |
| ctx->overps[i]->mend = 0; |
| ctx->overps[i]->mstart = 0; |
| } |
| } else { |
| ctx->overps[i]->mend = ctx->overps[i]->end; |
| ctx->overps[i]->mstart = ctx->overps[i]->start; |
| ctx->overps[i]->offset = 0; |
| max = *ctx->overps[i]; |
| } |
| } |
| bail: |
| return err; |
| } |
| |
| #define K_COPY_FROM_USER(err, kernel, dst, src, size) \ |
| do {\ |
| if (!(kernel))\ |
| VERIFY(err, 0 == copy_from_user((dst), (src),\ |
| (size)));\ |
| else\ |
| memmove((dst), (src), (size));\ |
| } while (0) |
| |
| #define K_COPY_TO_USER(err, kernel, dst, src, size) \ |
| do {\ |
| if (!(kernel))\ |
| VERIFY(err, 0 == copy_to_user((dst), (src),\ |
| (size)));\ |
| else\ |
| memmove((dst), (src), (size));\ |
| } while (0) |
| |
| |
| static void context_free(struct smq_invoke_ctx *ctx); |
| |
| static int context_alloc(struct fastrpc_file *fl, uint32_t kernel, |
| struct fastrpc_ioctl_invoke_crc *invokefd, |
| struct smq_invoke_ctx **po) |
| { |
| int err = 0, bufs, size = 0; |
| struct smq_invoke_ctx *ctx = 0; |
| struct fastrpc_ctx_lst *clst = &fl->clst; |
| struct fastrpc_ioctl_invoke *invoke = &invokefd->inv; |
| |
| bufs = REMOTE_SCALARS_LENGTH(invoke->sc); |
| size = bufs * sizeof(*ctx->lpra) + bufs * sizeof(*ctx->maps) + |
| sizeof(*ctx->fds) * (bufs) + |
| sizeof(*ctx->attrs) * (bufs) + |
| sizeof(*ctx->overs) * (bufs) + |
| sizeof(*ctx->overps) * (bufs); |
| |
| VERIFY(err, ctx = kzalloc(sizeof(*ctx) + size, GFP_KERNEL)); |
| if (err) |
| goto bail; |
| |
| INIT_HLIST_NODE(&ctx->hn); |
| hlist_add_fake(&ctx->hn); |
| ctx->fl = fl; |
| ctx->maps = (struct fastrpc_mmap **)(&ctx[1]); |
| ctx->lpra = (remote_arg_t *)(&ctx->maps[bufs]); |
| ctx->fds = (int *)(&ctx->lpra[bufs]); |
| ctx->attrs = (unsigned int *)(&ctx->fds[bufs]); |
| ctx->overs = (struct overlap *)(&ctx->attrs[bufs]); |
| ctx->overps = (struct overlap **)(&ctx->overs[bufs]); |
| |
| K_COPY_FROM_USER(err, kernel, ctx->lpra, invoke->pra, |
| bufs * sizeof(*ctx->lpra)); |
| if (err) |
| goto bail; |
| |
| if (invokefd->fds) { |
| K_COPY_FROM_USER(err, kernel, ctx->fds, invokefd->fds, |
| bufs * sizeof(*ctx->fds)); |
| if (err) |
| goto bail; |
| } |
| if (invokefd->attrs) { |
| K_COPY_FROM_USER(err, kernel, ctx->attrs, invokefd->attrs, |
| bufs * sizeof(*ctx->attrs)); |
| if (err) |
| goto bail; |
| } |
| ctx->crc = (uint32_t *)invokefd->crc; |
| ctx->sc = invoke->sc; |
| if (bufs) { |
| VERIFY(err, 0 == context_build_overlap(ctx)); |
| if (err) |
| goto bail; |
| } |
| ctx->retval = -1; |
| ctx->pid = current->pid; |
| ctx->tgid = current->tgid; |
| init_completion(&ctx->work); |
| |
| spin_lock(&fl->hlock); |
| hlist_add_head(&ctx->hn, &clst->pending); |
| spin_unlock(&fl->hlock); |
| |
| *po = ctx; |
| bail: |
| if (ctx && err) |
| context_free(ctx); |
| return err; |
| } |
| |
| static void context_save_interrupted(struct smq_invoke_ctx *ctx) |
| { |
| struct fastrpc_ctx_lst *clst = &ctx->fl->clst; |
| |
| spin_lock(&ctx->fl->hlock); |
| hlist_del_init(&ctx->hn); |
| hlist_add_head(&ctx->hn, &clst->interrupted); |
| spin_unlock(&ctx->fl->hlock); |
| /* free the cache on power collapse */ |
| fastrpc_buf_list_free(ctx->fl); |
| } |
| |
| static void context_free(struct smq_invoke_ctx *ctx) |
| { |
| int i; |
| int nbufs = REMOTE_SCALARS_INBUFS(ctx->sc) + |
| REMOTE_SCALARS_OUTBUFS(ctx->sc); |
| spin_lock(&ctx->fl->hlock); |
| hlist_del_init(&ctx->hn); |
| spin_unlock(&ctx->fl->hlock); |
| for (i = 0; i < nbufs; ++i) |
| fastrpc_mmap_free(ctx->maps[i]); |
| fastrpc_buf_free(ctx->buf, 1); |
| kfree(ctx); |
| } |
| |
| static void context_notify_user(struct smq_invoke_ctx *ctx, int retval) |
| { |
| ctx->retval = retval; |
| complete(&ctx->work); |
| } |
| |
| |
| static void fastrpc_notify_users(struct fastrpc_file *me) |
| { |
| struct smq_invoke_ctx *ictx; |
| struct hlist_node *n; |
| |
| spin_lock(&me->hlock); |
| hlist_for_each_entry_safe(ictx, n, &me->clst.pending, hn) { |
| complete(&ictx->work); |
| } |
| hlist_for_each_entry_safe(ictx, n, &me->clst.interrupted, hn) { |
| complete(&ictx->work); |
| } |
| spin_unlock(&me->hlock); |
| |
| } |
| |
| static void fastrpc_notify_drivers(struct fastrpc_apps *me, int cid) |
| { |
| struct fastrpc_file *fl; |
| struct hlist_node *n; |
| |
| spin_lock(&me->hlock); |
| hlist_for_each_entry_safe(fl, n, &me->drivers, hn) { |
| if (fl->cid == cid) |
| fastrpc_notify_users(fl); |
| } |
| spin_unlock(&me->hlock); |
| |
| } |
| static void context_list_ctor(struct fastrpc_ctx_lst *me) |
| { |
| INIT_HLIST_HEAD(&me->interrupted); |
| INIT_HLIST_HEAD(&me->pending); |
| } |
| |
| static void fastrpc_context_list_dtor(struct fastrpc_file *fl) |
| { |
| struct fastrpc_ctx_lst *clst = &fl->clst; |
| struct smq_invoke_ctx *ictx = 0, *ctxfree; |
| struct hlist_node *n; |
| |
| do { |
| ctxfree = 0; |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(ictx, n, &clst->interrupted, hn) { |
| hlist_del_init(&ictx->hn); |
| ctxfree = ictx; |
| break; |
| } |
| spin_unlock(&fl->hlock); |
| if (ctxfree) |
| context_free(ctxfree); |
| } while (ctxfree); |
| do { |
| ctxfree = 0; |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(ictx, n, &clst->pending, hn) { |
| hlist_del_init(&ictx->hn); |
| ctxfree = ictx; |
| break; |
| } |
| spin_unlock(&fl->hlock); |
| if (ctxfree) |
| context_free(ctxfree); |
| } while (ctxfree); |
| } |
| |
| static int fastrpc_file_free(struct fastrpc_file *fl); |
| static void fastrpc_file_list_dtor(struct fastrpc_apps *me) |
| { |
| struct fastrpc_file *fl, *free; |
| struct hlist_node *n; |
| |
| do { |
| free = 0; |
| spin_lock(&me->hlock); |
| hlist_for_each_entry_safe(fl, n, &me->drivers, hn) { |
| hlist_del_init(&fl->hn); |
| free = fl; |
| break; |
| } |
| spin_unlock(&me->hlock); |
| if (free) |
| fastrpc_file_free(free); |
| } while (free); |
| } |
| |
| static int get_args(uint32_t kernel, struct smq_invoke_ctx *ctx) |
| { |
| remote_arg64_t *rpra; |
| remote_arg_t *lpra = ctx->lpra; |
| struct smq_invoke_buf *list; |
| struct smq_phy_page *pages, *ipage; |
| uint32_t sc = ctx->sc; |
| int inbufs = REMOTE_SCALARS_INBUFS(sc); |
| int outbufs = REMOTE_SCALARS_OUTBUFS(sc); |
| int handles, bufs = inbufs + outbufs; |
| uintptr_t args; |
| ssize_t rlen = 0, copylen = 0, metalen = 0; |
| int i, oix; |
| int err = 0; |
| int mflags = 0; |
| uint64_t *fdlist; |
| uint32_t *crclist; |
| |
| /* calculate size of the metadata */ |
| rpra = 0; |
| list = smq_invoke_buf_start(rpra, sc); |
| pages = smq_phy_page_start(sc, list); |
| ipage = pages; |
| |
| for (i = 0; i < bufs; ++i) { |
| uintptr_t buf = (uintptr_t)lpra[i].buf.pv; |
| ssize_t len = lpra[i].buf.len; |
| |
| if (ctx->fds[i] && (ctx->fds[i] != -1)) |
| fastrpc_mmap_create(ctx->fl, ctx->fds[i], |
| ctx->attrs[i], buf, len, |
| mflags, &ctx->maps[i]); |
| ipage += 1; |
| } |
| handles = REMOTE_SCALARS_INHANDLES(sc) + REMOTE_SCALARS_OUTHANDLES(sc); |
| for (i = bufs; i < bufs + handles; i++) { |
| VERIFY(err, !fastrpc_mmap_create(ctx->fl, ctx->fds[i], |
| FASTRPC_ATTR_NOVA, 0, 0, 0, &ctx->maps[i])); |
| if (err) |
| goto bail; |
| ipage += 1; |
| } |
| metalen = copylen = (ssize_t)&ipage[0] + (sizeof(uint64_t) * M_FDLIST) + |
| (sizeof(uint32_t) * M_CRCLIST); |
| |
| /* calculate len requreed for copying */ |
| for (oix = 0; oix < inbufs + outbufs; ++oix) { |
| int i = ctx->overps[oix]->raix; |
| uintptr_t mstart, mend; |
| ssize_t len = lpra[i].buf.len; |
| |
| if (!len) |
| continue; |
| if (ctx->maps[i]) |
| continue; |
| if (ctx->overps[oix]->offset == 0) |
| copylen = ALIGN(copylen, BALIGN); |
| mstart = ctx->overps[oix]->mstart; |
| mend = ctx->overps[oix]->mend; |
| VERIFY(err, (mend - mstart) <= LONG_MAX); |
| if (err) |
| goto bail; |
| copylen += mend - mstart; |
| VERIFY(err, copylen >= 0); |
| if (err) |
| goto bail; |
| } |
| ctx->used = copylen; |
| |
| /* allocate new buffer */ |
| if (copylen) { |
| VERIFY(err, !fastrpc_buf_alloc(ctx->fl, copylen, &ctx->buf)); |
| if (err) |
| goto bail; |
| } |
| if (ctx->buf->virt && metalen <= copylen) |
| memset(ctx->buf->virt, 0, metalen); |
| |
| /* copy metadata */ |
| rpra = ctx->buf->virt; |
| ctx->rpra = rpra; |
| list = smq_invoke_buf_start(rpra, sc); |
| pages = smq_phy_page_start(sc, list); |
| ipage = pages; |
| args = (uintptr_t)ctx->buf->virt + metalen; |
| for (i = 0; i < bufs + handles; ++i) { |
| if (lpra[i].buf.len) |
| list[i].num = 1; |
| else |
| list[i].num = 0; |
| list[i].pgidx = ipage - pages; |
| ipage++; |
| } |
| /* map ion buffers */ |
| PERF(ctx->fl->profile, ctx->fl->perf.map, |
| for (i = 0; i < inbufs + outbufs; ++i) { |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| uint64_t buf = ptr_to_uint64(lpra[i].buf.pv); |
| ssize_t len = lpra[i].buf.len; |
| |
| rpra[i].buf.pv = 0; |
| rpra[i].buf.len = len; |
| if (!len) |
| continue; |
| if (map) { |
| struct vm_area_struct *vma; |
| uintptr_t offset; |
| int num = buf_num_pages(buf, len); |
| int idx = list[i].pgidx; |
| |
| if (map->attr & FASTRPC_ATTR_NOVA) { |
| offset = 0; |
| } else { |
| down_read(¤t->mm->mmap_sem); |
| VERIFY(err, NULL != (vma = find_vma(current->mm, |
| map->va))); |
| if (err) { |
| up_read(¤t->mm->mmap_sem); |
| goto bail; |
| } |
| offset = buf_page_start(buf) - vma->vm_start; |
| up_read(¤t->mm->mmap_sem); |
| VERIFY(err, offset < (uintptr_t)map->size); |
| if (err) |
| goto bail; |
| } |
| pages[idx].addr = map->phys + offset; |
| pages[idx].size = num << PAGE_SHIFT; |
| } |
| rpra[i].buf.pv = buf; |
| } |
| PERF_END); |
| for (i = bufs; i < bufs + handles; ++i) { |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| |
| pages[i].addr = map->phys; |
| pages[i].size = map->size; |
| } |
| fdlist = (uint64_t *)&pages[bufs + handles]; |
| for (i = 0; i < M_FDLIST; i++) |
| fdlist[i] = 0; |
| crclist = (uint32_t *)&fdlist[M_FDLIST]; |
| memset(crclist, 0, sizeof(uint32_t)*M_CRCLIST); |
| |
| /* copy non ion buffers */ |
| PERF(ctx->fl->profile, ctx->fl->perf.copy, |
| rlen = copylen - metalen; |
| for (oix = 0; oix < inbufs + outbufs; ++oix) { |
| int i = ctx->overps[oix]->raix; |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| ssize_t mlen; |
| uint64_t buf; |
| ssize_t len = lpra[i].buf.len; |
| |
| if (!len) |
| continue; |
| if (map) |
| continue; |
| if (ctx->overps[oix]->offset == 0) { |
| rlen -= ALIGN(args, BALIGN) - args; |
| args = ALIGN(args, BALIGN); |
| } |
| mlen = ctx->overps[oix]->mend - ctx->overps[oix]->mstart; |
| VERIFY(err, rlen >= mlen); |
| if (err) |
| goto bail; |
| rpra[i].buf.pv = (args - ctx->overps[oix]->offset); |
| pages[list[i].pgidx].addr = ctx->buf->phys - |
| ctx->overps[oix]->offset + |
| (copylen - rlen); |
| pages[list[i].pgidx].addr = |
| buf_page_start(pages[list[i].pgidx].addr); |
| buf = rpra[i].buf.pv; |
| pages[list[i].pgidx].size = buf_num_pages(buf, len) * PAGE_SIZE; |
| if (i < inbufs) { |
| K_COPY_FROM_USER(err, kernel, uint64_to_ptr(buf), |
| lpra[i].buf.pv, len); |
| if (err) |
| goto bail; |
| } |
| args = args + mlen; |
| rlen -= mlen; |
| } |
| PERF_END); |
| |
| PERF(ctx->fl->profile, ctx->fl->perf.flush, |
| for (oix = 0; oix < inbufs + outbufs; ++oix) { |
| int i = ctx->overps[oix]->raix; |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| |
| if (map && map->uncached) |
| continue; |
| if (ctx->fl->sctx->smmu.coherent && |
| !(map && (map->attr & FASTRPC_ATTR_NON_COHERENT))) |
| continue; |
| if (map && (map->attr & FASTRPC_ATTR_COHERENT)) |
| continue; |
| |
| if (rpra[i].buf.len && ctx->overps[oix]->mstart) |
| dmac_flush_range(uint64_to_ptr(rpra[i].buf.pv), |
| uint64_to_ptr(rpra[i].buf.pv + rpra[i].buf.len)); |
| } |
| PERF_END); |
| for (i = bufs; i < bufs + handles; i++) { |
| rpra[i].dma.fd = ctx->fds[i]; |
| rpra[i].dma.len = (uint32_t)lpra[i].buf.len; |
| rpra[i].dma.offset = (uint32_t)(uintptr_t)lpra[i].buf.pv; |
| } |
| |
| if (!ctx->fl->sctx->smmu.coherent) { |
| PERF(ctx->fl->profile, ctx->fl->perf.flush, |
| dmac_flush_range((char *)rpra, (char *)rpra + ctx->used); |
| PERF_END); |
| } |
| bail: |
| return err; |
| } |
| |
| static int put_args(uint32_t kernel, struct smq_invoke_ctx *ctx, |
| remote_arg_t *upra) |
| { |
| uint32_t sc = ctx->sc; |
| struct smq_invoke_buf *list; |
| struct smq_phy_page *pages; |
| struct fastrpc_mmap *mmap; |
| uint64_t *fdlist; |
| uint32_t *crclist = NULL; |
| |
| remote_arg64_t *rpra = ctx->rpra; |
| int i, inbufs, outbufs, handles; |
| int err = 0; |
| |
| inbufs = REMOTE_SCALARS_INBUFS(sc); |
| outbufs = REMOTE_SCALARS_OUTBUFS(sc); |
| handles = REMOTE_SCALARS_INHANDLES(sc) + REMOTE_SCALARS_OUTHANDLES(sc); |
| list = smq_invoke_buf_start(ctx->rpra, sc); |
| pages = smq_phy_page_start(sc, list); |
| fdlist = (uint64_t *)(pages + inbufs + outbufs + handles); |
| crclist = (uint32_t *)(fdlist + M_FDLIST); |
| |
| for (i = inbufs; i < inbufs + outbufs; ++i) { |
| if (!ctx->maps[i]) { |
| K_COPY_TO_USER(err, kernel, |
| ctx->lpra[i].buf.pv, |
| uint64_to_ptr(rpra[i].buf.pv), |
| rpra[i].buf.len); |
| if (err) |
| goto bail; |
| } else { |
| fastrpc_mmap_free(ctx->maps[i]); |
| ctx->maps[i] = 0; |
| } |
| } |
| if (inbufs + outbufs + handles) { |
| for (i = 0; i < M_FDLIST; i++) { |
| if (!fdlist[i]) |
| break; |
| if (!fastrpc_mmap_find(ctx->fl, (int)fdlist[i], 0, 0, |
| 0, 0, &mmap)) |
| fastrpc_mmap_free(mmap); |
| } |
| } |
| if (ctx->crc && crclist && rpra) |
| K_COPY_TO_USER(err, kernel, (void __user *)ctx->crc, |
| crclist, M_CRCLIST*sizeof(uint32_t)); |
| |
| bail: |
| return err; |
| } |
| |
| static void inv_args_pre(struct smq_invoke_ctx *ctx) |
| { |
| int i, inbufs, outbufs; |
| uint32_t sc = ctx->sc; |
| remote_arg64_t *rpra = ctx->rpra; |
| uintptr_t end; |
| |
| inbufs = REMOTE_SCALARS_INBUFS(sc); |
| outbufs = REMOTE_SCALARS_OUTBUFS(sc); |
| for (i = inbufs; i < inbufs + outbufs; ++i) { |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| |
| if (map && map->uncached) |
| continue; |
| if (!rpra[i].buf.len) |
| continue; |
| if (ctx->fl->sctx->smmu.coherent && |
| !(map && (map->attr & FASTRPC_ATTR_NON_COHERENT))) |
| continue; |
| if (map && (map->attr & FASTRPC_ATTR_COHERENT)) |
| continue; |
| |
| if (buf_page_start(ptr_to_uint64((void *)rpra)) == |
| buf_page_start(rpra[i].buf.pv)) |
| continue; |
| if (!IS_CACHE_ALIGNED((uintptr_t)uint64_to_ptr(rpra[i].buf.pv))) |
| dmac_flush_range(uint64_to_ptr(rpra[i].buf.pv), |
| (char *)(uint64_to_ptr(rpra[i].buf.pv + 1))); |
| end = (uintptr_t)uint64_to_ptr(rpra[i].buf.pv + |
| rpra[i].buf.len); |
| if (!IS_CACHE_ALIGNED(end)) |
| dmac_flush_range((char *)end, |
| (char *)end + 1); |
| } |
| } |
| |
| static void inv_args(struct smq_invoke_ctx *ctx) |
| { |
| int i, inbufs, outbufs; |
| uint32_t sc = ctx->sc; |
| remote_arg64_t *rpra = ctx->rpra; |
| int used = ctx->used; |
| |
| inbufs = REMOTE_SCALARS_INBUFS(sc); |
| outbufs = REMOTE_SCALARS_OUTBUFS(sc); |
| for (i = inbufs; i < inbufs + outbufs; ++i) { |
| struct fastrpc_mmap *map = ctx->maps[i]; |
| |
| if (map && map->uncached) |
| continue; |
| if (!rpra[i].buf.len) |
| continue; |
| if (ctx->fl->sctx->smmu.coherent && |
| !(map && (map->attr & FASTRPC_ATTR_NON_COHERENT))) |
| continue; |
| if (map && (map->attr & FASTRPC_ATTR_COHERENT)) |
| continue; |
| |
| if (buf_page_start(ptr_to_uint64((void *)rpra)) == |
| buf_page_start(rpra[i].buf.pv)) { |
| continue; |
| } |
| if (map && map->handle) |
| msm_ion_do_cache_op(ctx->fl->apps->client, map->handle, |
| (char *)uint64_to_ptr(rpra[i].buf.pv), |
| rpra[i].buf.len, ION_IOC_INV_CACHES); |
| else |
| dmac_inv_range((char *)uint64_to_ptr(rpra[i].buf.pv), |
| (char *)uint64_to_ptr(rpra[i].buf.pv |
| + rpra[i].buf.len)); |
| } |
| |
| if (rpra) |
| dmac_inv_range(rpra, (char *)rpra + used); |
| } |
| |
| static int fastrpc_invoke_send(struct smq_invoke_ctx *ctx, |
| uint32_t kernel, uint32_t handle) |
| { |
| struct smq_msg *msg = &ctx->msg; |
| struct fastrpc_file *fl = ctx->fl; |
| struct fastrpc_channel_ctx *channel_ctx = &fl->apps->channel[fl->cid]; |
| int err = 0; |
| |
| VERIFY(err, 0 != channel_ctx->chan); |
| if (err) |
| goto bail; |
| msg->pid = current->tgid; |
| msg->tid = current->pid; |
| if (kernel) |
| msg->pid = 0; |
| msg->invoke.header.ctx = ptr_to_uint64(ctx) | fl->pd; |
| msg->invoke.header.handle = handle; |
| msg->invoke.header.sc = ctx->sc; |
| msg->invoke.page.addr = ctx->buf ? ctx->buf->phys : 0; |
| msg->invoke.page.size = buf_page_size(ctx->used); |
| |
| if (fl->ssrcount != channel_ctx->ssrcount) { |
| err = -ECONNRESET; |
| goto bail; |
| } |
| VERIFY(err, channel_ctx->link.port_state == |
| FASTRPC_LINK_CONNECTED); |
| if (err) |
| goto bail; |
| err = glink_tx(channel_ctx->chan, |
| (void *)&fl->apps->channel[fl->cid], msg, sizeof(*msg), |
| GLINK_TX_REQ_INTENT); |
| bail: |
| return err; |
| } |
| |
| static void fastrpc_init(struct fastrpc_apps *me) |
| { |
| int i; |
| |
| INIT_HLIST_HEAD(&me->drivers); |
| spin_lock_init(&me->hlock); |
| mutex_init(&me->smd_mutex); |
| me->channel = &gcinfo[0]; |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| init_completion(&me->channel[i].work); |
| init_completion(&me->channel[i].workport); |
| me->channel[i].sesscount = 0; |
| } |
| } |
| |
| static int fastrpc_release_current_dsp_process(struct fastrpc_file *fl); |
| |
| static int fastrpc_internal_invoke(struct fastrpc_file *fl, uint32_t mode, |
| uint32_t kernel, |
| struct fastrpc_ioctl_invoke_crc *inv) |
| { |
| struct smq_invoke_ctx *ctx = 0; |
| struct fastrpc_ioctl_invoke *invoke = &inv->inv; |
| int cid = fl->cid; |
| int interrupted = 0; |
| int err = 0; |
| struct timespec invoket; |
| |
| if (fl->profile) |
| getnstimeofday(&invoket); |
| if (!kernel) { |
| VERIFY(err, 0 == context_restore_interrupted(fl, inv, |
| &ctx)); |
| if (err) |
| goto bail; |
| if (fl->sctx->smmu.faults) |
| err = FASTRPC_ENOSUCH; |
| if (err) |
| goto bail; |
| if (ctx) |
| goto wait; |
| } |
| |
| VERIFY(err, 0 == context_alloc(fl, kernel, inv, &ctx)); |
| if (err) |
| goto bail; |
| |
| if (REMOTE_SCALARS_LENGTH(ctx->sc)) { |
| PERF(fl->profile, fl->perf.getargs, |
| VERIFY(err, 0 == get_args(kernel, ctx)); |
| PERF_END); |
| if (err) |
| goto bail; |
| } |
| |
| if (!fl->sctx->smmu.coherent) |
| inv_args_pre(ctx); |
| PERF(fl->profile, fl->perf.link, |
| VERIFY(err, 0 == fastrpc_invoke_send(ctx, kernel, invoke->handle)); |
| PERF_END); |
| |
| if (err) |
| goto bail; |
| wait: |
| if (kernel) |
| wait_for_completion(&ctx->work); |
| else { |
| interrupted = wait_for_completion_interruptible(&ctx->work); |
| VERIFY(err, 0 == (err = interrupted)); |
| if (err) |
| goto bail; |
| } |
| |
| PERF(fl->profile, fl->perf.invargs, |
| if (!fl->sctx->smmu.coherent) |
| inv_args(ctx); |
| PERF_END); |
| |
| VERIFY(err, 0 == (err = ctx->retval)); |
| if (err) |
| goto bail; |
| |
| PERF(fl->profile, fl->perf.putargs, |
| VERIFY(err, 0 == put_args(kernel, ctx, invoke->pra)); |
| PERF_END); |
| if (err) |
| goto bail; |
| bail: |
| if (ctx && interrupted == -ERESTARTSYS) |
| context_save_interrupted(ctx); |
| else if (ctx) |
| context_free(ctx); |
| if (fl->ssrcount != fl->apps->channel[cid].ssrcount) |
| err = ECONNRESET; |
| |
| if (fl->profile && !interrupted) { |
| if (invoke->handle != FASTRPC_STATIC_HANDLE_LISTENER) |
| fl->perf.invoke += getnstimediff(&invoket); |
| if (!(invoke->handle >= 0 && |
| invoke->handle <= FASTRPC_STATIC_HANDLE_MAX)) |
| fl->perf.count++; |
| } |
| return err; |
| } |
| |
| static int fastrpc_channel_open(struct fastrpc_file *fl); |
| static int fastrpc_init_process(struct fastrpc_file *fl, |
| struct fastrpc_ioctl_init_attrs *uproc) |
| { |
| int err = 0; |
| struct fastrpc_ioctl_invoke_crc ioctl; |
| struct fastrpc_ioctl_init *init = &uproc->init; |
| struct smq_phy_page pages[1]; |
| struct fastrpc_mmap *file = 0, *mem = 0; |
| |
| VERIFY(err, !fastrpc_channel_open(fl)); |
| if (err) |
| goto bail; |
| if (init->flags == FASTRPC_INIT_ATTACH) { |
| remote_arg_t ra[1]; |
| int tgid = current->tgid; |
| |
| ra[0].buf.pv = (void *)&tgid; |
| ra[0].buf.len = sizeof(tgid); |
| ioctl.inv.handle = 1; |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(0, 1, 0); |
| ioctl.inv.pra = ra; |
| ioctl.fds = 0; |
| ioctl.attrs = 0; |
| ioctl.crc = NULL; |
| fl->pd = 0; |
| VERIFY(err, !(err = fastrpc_internal_invoke(fl, |
| FASTRPC_MODE_PARALLEL, 1, &ioctl))); |
| if (err) |
| goto bail; |
| } else if (init->flags == FASTRPC_INIT_CREATE) { |
| remote_arg_t ra[6]; |
| int fds[6]; |
| int mflags = 0; |
| struct { |
| int pgid; |
| int namelen; |
| int filelen; |
| int pageslen; |
| int attrs; |
| int siglen; |
| } inbuf; |
| |
| inbuf.pgid = current->tgid; |
| inbuf.namelen = strlen(current->comm) + 1; |
| inbuf.filelen = init->filelen; |
| fl->pd = 1; |
| if (init->filelen) { |
| VERIFY(err, !fastrpc_mmap_create(fl, init->filefd, 0, |
| init->file, init->filelen, mflags, &file)); |
| if (err) |
| goto bail; |
| } |
| inbuf.pageslen = 1; |
| VERIFY(err, !fastrpc_mmap_create(fl, init->memfd, 0, |
| init->mem, init->memlen, mflags, &mem)); |
| if (err) |
| goto bail; |
| inbuf.pageslen = 1; |
| ra[0].buf.pv = (void *)&inbuf; |
| ra[0].buf.len = sizeof(inbuf); |
| fds[0] = 0; |
| |
| ra[1].buf.pv = (void *)current->comm; |
| ra[1].buf.len = inbuf.namelen; |
| fds[1] = 0; |
| |
| ra[2].buf.pv = (void *)init->file; |
| ra[2].buf.len = inbuf.filelen; |
| fds[2] = init->filefd; |
| |
| pages[0].addr = mem->phys; |
| pages[0].size = mem->size; |
| ra[3].buf.pv = (void *)pages; |
| ra[3].buf.len = 1 * sizeof(*pages); |
| fds[3] = 0; |
| |
| inbuf.attrs = uproc->attrs; |
| ra[4].buf.pv = (void *)&(inbuf.attrs); |
| ra[4].buf.len = sizeof(inbuf.attrs); |
| fds[4] = 0; |
| |
| inbuf.siglen = uproc->siglen; |
| ra[5].buf.pv = (void *)&(inbuf.siglen); |
| ra[5].buf.len = sizeof(inbuf.siglen); |
| fds[5] = 0; |
| |
| ioctl.inv.handle = 1; |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(6, 4, 0); |
| if (uproc->attrs) |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(7, 6, 0); |
| ioctl.inv.pra = ra; |
| ioctl.fds = fds; |
| ioctl.attrs = 0; |
| ioctl.crc = NULL; |
| VERIFY(err, !(err = fastrpc_internal_invoke(fl, |
| FASTRPC_MODE_PARALLEL, 1, &ioctl))); |
| if (err) |
| goto bail; |
| } else { |
| err = -ENOTTY; |
| } |
| bail: |
| if (mem && err) |
| fastrpc_mmap_free(mem); |
| if (file) |
| fastrpc_mmap_free(file); |
| return err; |
| } |
| |
| static int fastrpc_release_current_dsp_process(struct fastrpc_file *fl) |
| { |
| int err = 0; |
| struct fastrpc_ioctl_invoke_crc ioctl; |
| remote_arg_t ra[1]; |
| int tgid = 0; |
| |
| VERIFY(err, fl->cid >= 0 && fl->cid < NUM_CHANNELS); |
| if (err) |
| goto bail; |
| VERIFY(err, fl->apps->channel[fl->cid].chan != 0); |
| if (err) |
| goto bail; |
| tgid = fl->tgid; |
| ra[0].buf.pv = (void *)&tgid; |
| ra[0].buf.len = sizeof(tgid); |
| ioctl.inv.handle = 1; |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(1, 1, 0); |
| ioctl.inv.pra = ra; |
| ioctl.fds = 0; |
| ioctl.attrs = 0; |
| ioctl.crc = NULL; |
| VERIFY(err, 0 == (err = fastrpc_internal_invoke(fl, |
| FASTRPC_MODE_PARALLEL, 1, &ioctl))); |
| bail: |
| return err; |
| } |
| |
| static int fastrpc_mmap_on_dsp(struct fastrpc_file *fl, uint32_t flags, |
| struct fastrpc_mmap *map) |
| { |
| struct fastrpc_ioctl_invoke_crc ioctl; |
| struct smq_phy_page page; |
| int num = 1; |
| remote_arg_t ra[3]; |
| int err = 0; |
| struct { |
| int pid; |
| uint32_t flags; |
| uintptr_t vaddrin; |
| int num; |
| } inargs; |
| struct { |
| uintptr_t vaddrout; |
| } routargs; |
| |
| inargs.pid = current->tgid; |
| inargs.vaddrin = (uintptr_t)map->va; |
| inargs.flags = flags; |
| inargs.num = fl->apps->compat ? num * sizeof(page) : num; |
| ra[0].buf.pv = (void *)&inargs; |
| ra[0].buf.len = sizeof(inargs); |
| page.addr = map->phys; |
| page.size = map->size; |
| ra[1].buf.pv = (void *)&page; |
| ra[1].buf.len = num * sizeof(page); |
| |
| ra[2].buf.pv = (void *)&routargs; |
| ra[2].buf.len = sizeof(routargs); |
| |
| ioctl.inv.handle = 1; |
| if (fl->apps->compat) |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(4, 2, 1); |
| else |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(2, 2, 1); |
| ioctl.inv.pra = ra; |
| ioctl.fds = 0; |
| ioctl.attrs = 0; |
| ioctl.crc = NULL; |
| VERIFY(err, 0 == (err = fastrpc_internal_invoke(fl, |
| FASTRPC_MODE_PARALLEL, 1, &ioctl))); |
| map->raddr = (uintptr_t)routargs.vaddrout; |
| |
| return err; |
| } |
| |
| static int fastrpc_munmap_on_dsp(struct fastrpc_file *fl, |
| struct fastrpc_mmap *map) |
| { |
| struct fastrpc_ioctl_invoke_crc ioctl; |
| remote_arg_t ra[1]; |
| int err = 0; |
| struct { |
| int pid; |
| uintptr_t vaddrout; |
| ssize_t size; |
| } inargs; |
| |
| inargs.pid = current->tgid; |
| inargs.size = map->size; |
| inargs.vaddrout = map->raddr; |
| ra[0].buf.pv = (void *)&inargs; |
| ra[0].buf.len = sizeof(inargs); |
| |
| ioctl.inv.handle = 1; |
| if (fl->apps->compat) |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(5, 1, 0); |
| else |
| ioctl.inv.sc = REMOTE_SCALARS_MAKE(3, 1, 0); |
| ioctl.inv.pra = ra; |
| ioctl.fds = 0; |
| ioctl.attrs = 0; |
| ioctl.crc = NULL; |
| VERIFY(err, 0 == (err = fastrpc_internal_invoke(fl, |
| FASTRPC_MODE_PARALLEL, 1, &ioctl))); |
| return err; |
| } |
| |
| static int fastrpc_mmap_remove(struct fastrpc_file *fl, uintptr_t va, |
| ssize_t len, struct fastrpc_mmap **ppmap); |
| |
| static void fastrpc_mmap_add(struct fastrpc_mmap *map); |
| |
| static int fastrpc_internal_munmap(struct fastrpc_file *fl, |
| struct fastrpc_ioctl_munmap *ud) |
| { |
| int err = 0; |
| struct fastrpc_mmap *map = 0; |
| |
| VERIFY(err, !fastrpc_mmap_remove(fl, ud->vaddrout, ud->size, &map)); |
| if (err) |
| goto bail; |
| VERIFY(err, !fastrpc_munmap_on_dsp(fl, map)); |
| if (err) |
| goto bail; |
| fastrpc_mmap_free(map); |
| bail: |
| if (err && map) |
| fastrpc_mmap_add(map); |
| return err; |
| } |
| |
| static int fastrpc_internal_mmap(struct fastrpc_file *fl, |
| struct fastrpc_ioctl_mmap *ud) |
| { |
| |
| struct fastrpc_mmap *map = 0; |
| int err = 0; |
| |
| if (!fastrpc_mmap_find(fl, ud->fd, (uintptr_t)ud->vaddrin, ud->size, |
| ud->flags, 1, &map)) |
| return 0; |
| |
| VERIFY(err, !fastrpc_mmap_create(fl, ud->fd, 0, |
| (uintptr_t)ud->vaddrin, ud->size, ud->flags, &map)); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == fastrpc_mmap_on_dsp(fl, ud->flags, map)); |
| if (err) |
| goto bail; |
| ud->vaddrout = map->raddr; |
| bail: |
| if (err && map) |
| fastrpc_mmap_free(map); |
| return err; |
| } |
| |
| static void fastrpc_channel_close(struct kref *kref) |
| { |
| struct fastrpc_apps *me = &gfa; |
| struct fastrpc_channel_ctx *ctx; |
| int cid; |
| |
| ctx = container_of(kref, struct fastrpc_channel_ctx, kref); |
| cid = ctx - &gcinfo[0]; |
| fastrpc_glink_close(ctx->chan, cid); |
| ctx->chan = 0; |
| glink_unregister_link_state_cb(ctx->link.link_notify_handle); |
| ctx->link.link_notify_handle = NULL; |
| mutex_unlock(&me->smd_mutex); |
| pr_info("'closed /dev/%s c %d %d'\n", gcinfo[cid].name, |
| MAJOR(me->dev_no), cid); |
| } |
| |
| static void fastrpc_context_list_dtor(struct fastrpc_file *fl); |
| |
| static int fastrpc_session_alloc_locked(struct fastrpc_channel_ctx *chan, |
| int secure, struct fastrpc_session_ctx **session) |
| { |
| struct fastrpc_apps *me = &gfa; |
| int idx = 0, err = 0; |
| |
| if (chan->sesscount) { |
| for (idx = 0; idx < chan->sesscount; ++idx) { |
| if (!chan->session[idx].used && |
| chan->session[idx].smmu.secure == secure) { |
| chan->session[idx].used = 1; |
| break; |
| } |
| } |
| VERIFY(err, idx < chan->sesscount); |
| if (err) |
| goto bail; |
| chan->session[idx].smmu.faults = 0; |
| } else { |
| VERIFY(err, me->dev != NULL); |
| if (err) |
| goto bail; |
| chan->session[0].dev = me->dev; |
| } |
| |
| *session = &chan->session[idx]; |
| bail: |
| return err; |
| } |
| |
| bool fastrpc_glink_notify_rx_intent_req(void *h, const void *priv, size_t size) |
| { |
| if (glink_queue_rx_intent(h, NULL, size)) |
| return false; |
| return true; |
| } |
| |
| void fastrpc_glink_notify_tx_done(void *handle, const void *priv, |
| const void *pkt_priv, const void *ptr) |
| { |
| } |
| |
| void fastrpc_glink_notify_rx(void *handle, const void *priv, |
| const void *pkt_priv, const void *ptr, size_t size) |
| { |
| struct smq_invoke_rsp *rsp = (struct smq_invoke_rsp *)ptr; |
| int len = size; |
| |
| while (len >= sizeof(*rsp) && rsp) { |
| rsp->ctx = rsp->ctx & ~1; |
| context_notify_user(uint64_to_ptr(rsp->ctx), rsp->retval); |
| rsp++; |
| len = len - sizeof(*rsp); |
| } |
| glink_rx_done(handle, ptr, true); |
| } |
| |
| void fastrpc_glink_notify_state(void *handle, const void *priv, |
| unsigned int event) |
| { |
| struct fastrpc_apps *me = &gfa; |
| int cid = (int)(uintptr_t)priv; |
| struct fastrpc_glink_info *link; |
| |
| if (cid < 0 || cid >= NUM_CHANNELS) |
| return; |
| link = &me->channel[cid].link; |
| switch (event) { |
| case GLINK_CONNECTED: |
| link->port_state = FASTRPC_LINK_CONNECTED; |
| complete(&me->channel[cid].workport); |
| break; |
| case GLINK_LOCAL_DISCONNECTED: |
| link->port_state = FASTRPC_LINK_DISCONNECTED; |
| break; |
| case GLINK_REMOTE_DISCONNECTED: |
| if (me->channel[cid].chan) { |
| fastrpc_glink_close(me->channel[cid].chan, cid); |
| me->channel[cid].chan = 0; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static int fastrpc_session_alloc(struct fastrpc_channel_ctx *chan, int secure, |
| struct fastrpc_session_ctx **session) |
| { |
| int err = 0; |
| struct fastrpc_apps *me = &gfa; |
| |
| mutex_lock(&me->smd_mutex); |
| if (!*session) |
| err = fastrpc_session_alloc_locked(chan, secure, session); |
| mutex_unlock(&me->smd_mutex); |
| return err; |
| } |
| |
| static void fastrpc_session_free(struct fastrpc_channel_ctx *chan, |
| struct fastrpc_session_ctx *session) |
| { |
| struct fastrpc_apps *me = &gfa; |
| |
| mutex_lock(&me->smd_mutex); |
| session->used = 0; |
| mutex_unlock(&me->smd_mutex); |
| } |
| |
| static int fastrpc_file_free(struct fastrpc_file *fl) |
| { |
| struct hlist_node *n; |
| struct fastrpc_mmap *map = 0; |
| int cid; |
| |
| if (!fl) |
| return 0; |
| cid = fl->cid; |
| |
| spin_lock(&fl->apps->hlock); |
| hlist_del_init(&fl->hn); |
| spin_unlock(&fl->apps->hlock); |
| |
| if (!fl->sctx) { |
| kfree(fl); |
| return 0; |
| } |
| (void)fastrpc_release_current_dsp_process(fl); |
| fastrpc_context_list_dtor(fl); |
| fastrpc_buf_list_free(fl); |
| hlist_for_each_entry_safe(map, n, &fl->maps, hn) { |
| fastrpc_mmap_free(map); |
| } |
| if (fl->ssrcount == fl->apps->channel[cid].ssrcount) |
| kref_put_mutex(&fl->apps->channel[cid].kref, |
| fastrpc_channel_close, &fl->apps->smd_mutex); |
| if (fl->sctx) |
| fastrpc_session_free(&fl->apps->channel[cid], fl->sctx); |
| if (fl->secsctx) |
| fastrpc_session_free(&fl->apps->channel[cid], fl->secsctx); |
| kfree(fl); |
| return 0; |
| } |
| |
| static int fastrpc_device_release(struct inode *inode, struct file *file) |
| { |
| struct fastrpc_file *fl = (struct fastrpc_file *)file->private_data; |
| |
| if (fl) { |
| if (fl->debugfs_file != NULL) |
| debugfs_remove(fl->debugfs_file); |
| fastrpc_file_free(fl); |
| file->private_data = 0; |
| } |
| return 0; |
| } |
| |
| static void fastrpc_link_state_handler(struct glink_link_state_cb_info *cb_info, |
| void *priv) |
| { |
| struct fastrpc_apps *me = &gfa; |
| int cid = (int)((uintptr_t)priv); |
| struct fastrpc_glink_info *link; |
| |
| if (cid < 0 || cid >= NUM_CHANNELS) |
| return; |
| |
| link = &me->channel[cid].link; |
| switch (cb_info->link_state) { |
| case GLINK_LINK_STATE_UP: |
| link->link_state = FASTRPC_LINK_STATE_UP; |
| complete(&me->channel[cid].work); |
| break; |
| case GLINK_LINK_STATE_DOWN: |
| link->link_state = FASTRPC_LINK_STATE_DOWN; |
| break; |
| default: |
| pr_err("adsprpc: unknown link state %d\n", cb_info->link_state); |
| break; |
| } |
| } |
| |
| static int fastrpc_glink_register(int cid, struct fastrpc_apps *me) |
| { |
| int err = 0; |
| struct fastrpc_glink_info *link; |
| |
| VERIFY(err, (cid >= 0 && cid < NUM_CHANNELS)); |
| if (err) |
| goto bail; |
| |
| link = &me->channel[cid].link; |
| if (link->link_notify_handle != NULL) |
| goto bail; |
| |
| link->link_info.glink_link_state_notif_cb = fastrpc_link_state_handler; |
| link->link_notify_handle = glink_register_link_state_cb( |
| &link->link_info, |
| (void *)((uintptr_t)cid)); |
| VERIFY(err, !IS_ERR_OR_NULL(me->channel[cid].link.link_notify_handle)); |
| if (err) { |
| link->link_notify_handle = NULL; |
| goto bail; |
| } |
| VERIFY(err, wait_for_completion_timeout(&me->channel[cid].work, |
| RPC_TIMEOUT)); |
| bail: |
| return err; |
| } |
| |
| static void fastrpc_glink_close(void *chan, int cid) |
| { |
| int err = 0; |
| struct fastrpc_glink_info *link; |
| |
| VERIFY(err, (cid >= 0 && cid < NUM_CHANNELS)); |
| if (err) |
| return; |
| link = &gfa.channel[cid].link; |
| |
| if (link->port_state == FASTRPC_LINK_CONNECTED) { |
| link->port_state = FASTRPC_LINK_DISCONNECTING; |
| glink_close(chan); |
| } |
| } |
| |
| static int fastrpc_glink_open(int cid) |
| { |
| int err = 0; |
| void *handle = NULL; |
| struct fastrpc_apps *me = &gfa; |
| struct glink_open_config *cfg; |
| struct fastrpc_glink_info *link; |
| |
| VERIFY(err, (cid >= 0 && cid < NUM_CHANNELS)); |
| if (err) |
| goto bail; |
| link = &me->channel[cid].link; |
| cfg = &me->channel[cid].link.cfg; |
| VERIFY(err, (link->link_state == FASTRPC_LINK_STATE_UP)); |
| if (err) |
| goto bail; |
| |
| VERIFY(err, (link->port_state == FASTRPC_LINK_DISCONNECTED)); |
| if (err) |
| goto bail; |
| |
| link->port_state = FASTRPC_LINK_CONNECTING; |
| cfg->priv = (void *)(uintptr_t)cid; |
| cfg->edge = gcinfo[cid].link.link_info.edge; |
| cfg->transport = gcinfo[cid].link.link_info.transport; |
| cfg->name = FASTRPC_GLINK_GUID; |
| cfg->notify_rx = fastrpc_glink_notify_rx; |
| cfg->notify_tx_done = fastrpc_glink_notify_tx_done; |
| cfg->notify_state = fastrpc_glink_notify_state; |
| cfg->notify_rx_intent_req = fastrpc_glink_notify_rx_intent_req; |
| handle = glink_open(cfg); |
| VERIFY(err, !IS_ERR_OR_NULL(handle)); |
| if (err) |
| goto bail; |
| me->channel[cid].chan = handle; |
| bail: |
| return err; |
| } |
| |
| static int fastrpc_debugfs_open(struct inode *inode, struct file *filp) |
| { |
| filp->private_data = inode->i_private; |
| return 0; |
| } |
| |
| static ssize_t fastrpc_debugfs_read(struct file *filp, char __user *buffer, |
| size_t count, loff_t *position) |
| { |
| struct fastrpc_file *fl = filp->private_data; |
| struct hlist_node *n; |
| struct fastrpc_buf *buf = 0; |
| struct fastrpc_mmap *map = 0; |
| struct smq_invoke_ctx *ictx = 0; |
| struct fastrpc_channel_ctx *chan; |
| struct fastrpc_session_ctx *sess; |
| unsigned int len = 0; |
| int i, j, ret = 0; |
| char *fileinfo = NULL; |
| |
| fileinfo = kzalloc(DEBUGFS_SIZE, GFP_KERNEL); |
| if (!fileinfo) |
| goto bail; |
| if (fl == NULL) { |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| chan = &gcinfo[i]; |
| len += scnprintf(fileinfo + len, |
| DEBUGFS_SIZE - len, "%s\n\n", |
| chan->name); |
| len += scnprintf(fileinfo + len, |
| DEBUGFS_SIZE - len, "%s %d\n", |
| "sesscount:", chan->sesscount); |
| for (j = 0; j < chan->sesscount; j++) { |
| sess = &chan->session[j]; |
| len += scnprintf(fileinfo + len, |
| DEBUGFS_SIZE - len, |
| "%s%d\n\n", "SESSION", j); |
| len += scnprintf(fileinfo + len, |
| DEBUGFS_SIZE - len, |
| "%s %d\n", "sid:", |
| sess->smmu.cb); |
| len += scnprintf(fileinfo + len, |
| DEBUGFS_SIZE - len, |
| "%s %d\n", "SECURE:", |
| sess->smmu.secure); |
| } |
| } |
| } else { |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %d\n\n", |
| "PROCESS_ID:", fl->tgid); |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %d\n\n", |
| "CHANNEL_ID:", fl->cid); |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %d\n\n", |
| "SSRCOUNT:", fl->ssrcount); |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s\n", |
| "LIST OF BUFS:"); |
| spin_lock(&fl->hlock); |
| hlist_for_each_entry_safe(buf, n, &fl->bufs, hn) { |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %p %s %p %s %llx\n", "buf:", |
| buf, "buf->virt:", buf->virt, |
| "buf->phys:", buf->phys); |
| } |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "\n%s\n", |
| "LIST OF MAPS:"); |
| hlist_for_each_entry_safe(map, n, &fl->maps, hn) { |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %p %s %lx %s %llx\n", |
| "map:", map, |
| "map->va:", map->va, |
| "map->phys:", map->phys); |
| } |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "\n%s\n", |
| "LIST OF PENDING SMQCONTEXTS:"); |
| hlist_for_each_entry_safe(ictx, n, &fl->clst.pending, hn) { |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %p %s %u %s %u %s %u\n", |
| "smqcontext:", ictx, |
| "sc:", ictx->sc, |
| "tid:", ictx->pid, |
| "handle", ictx->rpra->h); |
| } |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "\n%s\n", |
| "LIST OF INTERRUPTED SMQCONTEXTS:"); |
| hlist_for_each_entry_safe(ictx, n, &fl->clst.interrupted, hn) { |
| len += scnprintf(fileinfo + len, DEBUGFS_SIZE - len, |
| "%s %p %s %u %s %u %s %u\n", |
| "smqcontext:", ictx, |
| "sc:", ictx->sc, |
| "tid:", ictx->pid, |
| "handle", ictx->rpra->h); |
| } |
| spin_unlock(&fl->hlock); |
| } |
| if (len > DEBUGFS_SIZE) |
| len = DEBUGFS_SIZE; |
| ret = simple_read_from_buffer(buffer, count, position, fileinfo, len); |
| kfree(fileinfo); |
| bail: |
| return ret; |
| } |
| |
| static const struct file_operations debugfs_fops = { |
| .open = fastrpc_debugfs_open, |
| .read = fastrpc_debugfs_read, |
| }; |
| static int fastrpc_channel_open(struct fastrpc_file *fl) |
| { |
| struct fastrpc_apps *me = &gfa; |
| int cid, err = 0; |
| |
| mutex_lock(&me->smd_mutex); |
| |
| VERIFY(err, fl && fl->sctx); |
| if (err) |
| goto bail; |
| cid = fl->cid; |
| VERIFY(err, cid >= 0 && cid < NUM_CHANNELS); |
| if (err) |
| goto bail; |
| fl->ssrcount = me->channel[cid].ssrcount; |
| if ((kref_get_unless_zero(&me->channel[cid].kref) == 0) || |
| (me->channel[cid].chan == 0)) { |
| VERIFY(err, 0 == fastrpc_glink_register(cid, me)); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == fastrpc_glink_open(cid)); |
| if (err) |
| goto bail; |
| |
| VERIFY(err, |
| wait_for_completion_timeout(&me->channel[cid].workport, |
| RPC_TIMEOUT)); |
| if (err) { |
| me->channel[cid].chan = 0; |
| goto bail; |
| } |
| kref_init(&me->channel[cid].kref); |
| pr_info("'opened /dev/%s c %d %d'\n", gcinfo[cid].name, |
| MAJOR(me->dev_no), cid); |
| if (me->channel[cid].ssrcount != |
| me->channel[cid].prevssrcount) { |
| me->channel[cid].prevssrcount = |
| me->channel[cid].ssrcount; |
| } |
| } |
| |
| bail: |
| mutex_unlock(&me->smd_mutex); |
| return err; |
| } |
| |
| static int fastrpc_device_open(struct inode *inode, struct file *filp) |
| { |
| int err = 0; |
| struct dentry *debugfs_file; |
| struct fastrpc_file *fl = 0; |
| struct fastrpc_apps *me = &gfa; |
| |
| VERIFY(err, fl = kzalloc(sizeof(*fl), GFP_KERNEL)); |
| if (err) |
| return err; |
| debugfs_file = debugfs_create_file(current->comm, 0644, debugfs_root, |
| fl, &debugfs_fops); |
| context_list_ctor(&fl->clst); |
| spin_lock_init(&fl->hlock); |
| INIT_HLIST_HEAD(&fl->maps); |
| INIT_HLIST_HEAD(&fl->bufs); |
| INIT_HLIST_NODE(&fl->hn); |
| fl->tgid = current->tgid; |
| fl->apps = me; |
| fl->mode = FASTRPC_MODE_SERIAL; |
| fl->cid = -1; |
| if (debugfs_file != NULL) |
| fl->debugfs_file = debugfs_file; |
| memset(&fl->perf, 0, sizeof(fl->perf)); |
| filp->private_data = fl; |
| spin_lock(&me->hlock); |
| hlist_add_head(&fl->hn, &me->drivers); |
| spin_unlock(&me->hlock); |
| return 0; |
| } |
| |
| static int fastrpc_get_info(struct fastrpc_file *fl, uint32_t *info) |
| { |
| int err = 0; |
| uint32_t cid; |
| |
| VERIFY(err, fl != 0); |
| if (err) |
| goto bail; |
| if (fl->cid == -1) { |
| cid = *info; |
| VERIFY(err, cid < NUM_CHANNELS); |
| if (err) |
| goto bail; |
| fl->cid = cid; |
| fl->ssrcount = fl->apps->channel[cid].ssrcount; |
| VERIFY(err, !fastrpc_session_alloc_locked( |
| &fl->apps->channel[cid], 0, &fl->sctx)); |
| if (err) |
| goto bail; |
| } |
| *info = (fl->sctx->smmu.enabled ? 1 : 0); |
| bail: |
| return err; |
| } |
| |
| static long fastrpc_device_ioctl(struct file *file, unsigned int ioctl_num, |
| unsigned long ioctl_param) |
| { |
| union { |
| struct fastrpc_ioctl_invoke_crc inv; |
| struct fastrpc_ioctl_mmap mmap; |
| struct fastrpc_ioctl_munmap munmap; |
| struct fastrpc_ioctl_init_attrs init; |
| struct fastrpc_ioctl_perf perf; |
| } p; |
| void *param = (char *)ioctl_param; |
| struct fastrpc_file *fl = (struct fastrpc_file *)file->private_data; |
| int size = 0, err = 0; |
| uint32_t info; |
| |
| p.inv.fds = 0; |
| p.inv.attrs = 0; |
| p.inv.crc = NULL; |
| |
| switch (ioctl_num) { |
| case FASTRPC_IOCTL_INVOKE: |
| size = sizeof(struct fastrpc_ioctl_invoke); |
| /* fall through */ |
| case FASTRPC_IOCTL_INVOKE_FD: |
| if (!size) |
| size = sizeof(struct fastrpc_ioctl_invoke_fd); |
| /* fall through */ |
| case FASTRPC_IOCTL_INVOKE_ATTRS: |
| if (!size) |
| size = sizeof(struct fastrpc_ioctl_invoke_attrs); |
| /* fall through */ |
| case FASTRPC_IOCTL_INVOKE_CRC: |
| if (!size) |
| size = sizeof(struct fastrpc_ioctl_invoke_crc); |
| VERIFY(err, 0 == copy_from_user(&p.inv, param, size)); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == (err = fastrpc_internal_invoke(fl, fl->mode, |
| 0, &p.inv))); |
| if (err) |
| goto bail; |
| break; |
| case FASTRPC_IOCTL_MMAP: |
| VERIFY(err, 0 == copy_from_user(&p.mmap, param, |
| sizeof(p.mmap))); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == (err = fastrpc_internal_mmap(fl, &p.mmap))); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == copy_to_user(param, &p.mmap, sizeof(p.mmap))); |
| if (err) |
| goto bail; |
| break; |
| case FASTRPC_IOCTL_MUNMAP: |
| VERIFY(err, 0 == copy_from_user(&p.munmap, param, |
| sizeof(p.munmap))); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == (err = fastrpc_internal_munmap(fl, |
| &p.munmap))); |
| if (err) |
| goto bail; |
| break; |
| case FASTRPC_IOCTL_SETMODE: |
| switch ((uint32_t)ioctl_param) { |
| case FASTRPC_MODE_PARALLEL: |
| case FASTRPC_MODE_SERIAL: |
| fl->mode = (uint32_t)ioctl_param; |
| break; |
| case FASTRPC_MODE_PROFILE: |
| fl->profile = (uint32_t)ioctl_param; |
| break; |
| default: |
| err = -ENOTTY; |
| break; |
| } |
| break; |
| case FASTRPC_IOCTL_GETPERF: |
| VERIFY(err, 0 == copy_from_user(&p.perf, |
| param, sizeof(p.perf))); |
| if (err) |
| goto bail; |
| p.perf.numkeys = sizeof(struct fastrpc_perf)/sizeof(int64_t); |
| if (p.perf.keys) { |
| char *keys = PERF_KEYS; |
| |
| VERIFY(err, 0 == copy_to_user((char *)p.perf.keys, |
| keys, strlen(keys)+1)); |
| if (err) |
| goto bail; |
| } |
| if (p.perf.data) { |
| VERIFY(err, 0 == copy_to_user((int64_t *)p.perf.data, |
| &fl->perf, sizeof(fl->perf))); |
| } |
| VERIFY(err, 0 == copy_to_user(param, &p.perf, sizeof(p.perf))); |
| if (err) |
| goto bail; |
| break; |
| case FASTRPC_IOCTL_GETINFO: |
| VERIFY(err, 0 == copy_from_user(&info, param, sizeof(info))); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == (err = fastrpc_get_info(fl, &info))); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == copy_to_user(param, &info, sizeof(info))); |
| if (err) |
| goto bail; |
| break; |
| case FASTRPC_IOCTL_INIT: |
| p.init.attrs = 0; |
| p.init.siglen = 0; |
| size = sizeof(struct fastrpc_ioctl_init); |
| /* fall through */ |
| case FASTRPC_IOCTL_INIT_ATTRS: |
| if (!size) |
| size = sizeof(struct fastrpc_ioctl_init_attrs); |
| VERIFY(err, 0 == copy_from_user(&p.init, param, size)); |
| if (err) |
| goto bail; |
| VERIFY(err, 0 == fastrpc_init_process(fl, &p.init)); |
| if (err) |
| goto bail; |
| break; |
| |
| default: |
| err = -ENOTTY; |
| pr_info("bad ioctl: %d\n", ioctl_num); |
| break; |
| } |
| bail: |
| return err; |
| } |
| |
| static int fastrpc_restart_notifier_cb(struct notifier_block *nb, |
| unsigned long code, |
| void *data) |
| { |
| struct fastrpc_apps *me = &gfa; |
| struct fastrpc_channel_ctx *ctx; |
| int cid; |
| |
| ctx = container_of(nb, struct fastrpc_channel_ctx, nb); |
| cid = ctx - &me->channel[0]; |
| if (code == SUBSYS_BEFORE_SHUTDOWN) { |
| mutex_lock(&me->smd_mutex); |
| ctx->ssrcount++; |
| if (ctx->chan) { |
| fastrpc_glink_close(ctx->chan, cid); |
| ctx->chan = 0; |
| pr_info("'restart notifier: closed /dev/%s c %d %d'\n", |
| gcinfo[cid].name, MAJOR(me->dev_no), cid); |
| } |
| mutex_unlock(&me->smd_mutex); |
| fastrpc_notify_drivers(me, cid); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static const struct file_operations fops = { |
| .open = fastrpc_device_open, |
| .release = fastrpc_device_release, |
| .unlocked_ioctl = fastrpc_device_ioctl, |
| .compat_ioctl = compat_fastrpc_device_ioctl, |
| }; |
| |
| static const struct of_device_id fastrpc_match_table[] = { |
| { .compatible = "qcom,msm-fastrpc-adsp", }, |
| { .compatible = "qcom,msm-fastrpc-compute", }, |
| { .compatible = "qcom,msm-fastrpc-compute-cb", }, |
| { .compatible = "qcom,msm-adsprpc-mem-region", }, |
| {} |
| }; |
| |
| static int fastrpc_cb_probe(struct device *dev) |
| { |
| struct fastrpc_channel_ctx *chan; |
| struct fastrpc_session_ctx *sess; |
| struct of_phandle_args iommuspec; |
| const char *name; |
| unsigned int start = 0x80000000; |
| int err = 0, i; |
| int secure_vmid = VMID_CP_PIXEL; |
| |
| VERIFY(err, 0 != (name = of_get_property(dev->of_node, "label", NULL))); |
| if (err) |
| goto bail; |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| if (!gcinfo[i].name) |
| continue; |
| if (!strcmp(name, gcinfo[i].name)) |
| break; |
| } |
| VERIFY(err, i < NUM_CHANNELS); |
| if (err) |
| goto bail; |
| chan = &gcinfo[i]; |
| VERIFY(err, chan->sesscount < NUM_SESSIONS); |
| if (err) |
| goto bail; |
| |
| VERIFY(err, !of_parse_phandle_with_args(dev->of_node, "iommus", |
| "#iommu-cells", 0, &iommuspec)); |
| if (err) |
| goto bail; |
| sess = &chan->session[chan->sesscount]; |
| sess->smmu.cb = iommuspec.args[0] & 0xf; |
| sess->used = 0; |
| sess->smmu.coherent = of_property_read_bool(dev->of_node, |
| "dma-coherent"); |
| sess->smmu.secure = of_property_read_bool(dev->of_node, |
| "qcom,secure-context-bank"); |
| if (sess->smmu.secure) |
| start = 0x60000000; |
| VERIFY(err, !IS_ERR_OR_NULL(sess->smmu.mapping = |
| arm_iommu_create_mapping(&platform_bus_type, |
| start, 0x7fffffff))); |
| if (err) |
| goto bail; |
| |
| if (sess->smmu.secure) |
| iommu_domain_set_attr(sess->smmu.mapping->domain, |
| DOMAIN_ATTR_SECURE_VMID, |
| &secure_vmid); |
| |
| VERIFY(err, !arm_iommu_attach_device(dev, sess->smmu.mapping)); |
| if (err) |
| goto bail; |
| sess->dev = dev; |
| sess->smmu.enabled = 1; |
| chan->sesscount++; |
| debugfs_global_file = debugfs_create_file("global", 0644, debugfs_root, |
| NULL, &debugfs_fops); |
| bail: |
| return err; |
| } |
| |
| static int fastrpc_probe(struct platform_device *pdev) |
| { |
| int err = 0; |
| struct fastrpc_apps *me = &gfa; |
| struct device *dev = &pdev->dev; |
| struct smq_phy_page range; |
| struct device_node *ion_node, *node; |
| struct platform_device *ion_pdev; |
| struct cma *cma; |
| uint32_t val; |
| |
| if (of_device_is_compatible(dev->of_node, |
| "qcom,msm-fastrpc-compute-cb")) |
| return fastrpc_cb_probe(dev); |
| |
| if (of_device_is_compatible(dev->of_node, |
| "qcom,msm-adsprpc-mem-region")) { |
| me->dev = dev; |
| range.addr = 0; |
| ion_node = of_find_compatible_node(NULL, NULL, "qcom,msm-ion"); |
| if (ion_node) { |
| for_each_available_child_of_node(ion_node, node) { |
| if (of_property_read_u32(node, "reg", &val)) |
| continue; |
| if (val != ION_ADSP_HEAP_ID) |
| continue; |
| ion_pdev = of_find_device_by_node(node); |
| if (!ion_pdev) |
| break; |
| cma = dev_get_cma_area(&ion_pdev->dev); |
| if (cma) { |
| range.addr = cma_get_base(cma); |
| range.size = (size_t)cma_get_size(cma); |
| } |
| break; |
| } |
| } |
| if (range.addr) { |
| int srcVM[1] = {VMID_HLOS}; |
| int destVM[4] = {VMID_HLOS, VMID_MSS_MSA, VMID_SSC_Q6, |
| VMID_ADSP_Q6}; |
| int destVMperm[4] = {PERM_READ | PERM_WRITE | PERM_EXEC, |
| PERM_READ | PERM_WRITE | PERM_EXEC, |
| PERM_READ | PERM_WRITE | PERM_EXEC, |
| PERM_READ | PERM_WRITE | PERM_EXEC, |
| }; |
| |
| VERIFY(err, !hyp_assign_phys(range.addr, range.size, |
| srcVM, 1, destVM, destVMperm, 4)); |
| if (err) |
| goto bail; |
| } |
| return 0; |
| } |
| |
| VERIFY(err, !of_platform_populate(pdev->dev.of_node, |
| fastrpc_match_table, |
| NULL, &pdev->dev)); |
| if (err) |
| goto bail; |
| bail: |
| return err; |
| } |
| |
| static void fastrpc_deinit(void) |
| { |
| struct fastrpc_apps *me = &gfa; |
| struct fastrpc_channel_ctx *chan = gcinfo; |
| int i, j; |
| |
| for (i = 0; i < NUM_CHANNELS; i++, chan++) { |
| if (chan->chan) { |
| kref_put_mutex(&chan->kref, |
| fastrpc_channel_close, &me->smd_mutex); |
| chan->chan = 0; |
| } |
| for (j = 0; j < NUM_SESSIONS; j++) { |
| struct fastrpc_session_ctx *sess = &chan->session[j]; |
| |
| if (sess->smmu.enabled) { |
| arm_iommu_detach_device(sess->dev); |
| sess->dev = 0; |
| } |
| if (sess->smmu.mapping) { |
| arm_iommu_release_mapping(sess->smmu.mapping); |
| sess->smmu.mapping = 0; |
| } |
| } |
| } |
| } |
| |
| static struct platform_driver fastrpc_driver = { |
| .probe = fastrpc_probe, |
| .driver = { |
| .name = "fastrpc", |
| .owner = THIS_MODULE, |
| .of_match_table = fastrpc_match_table, |
| }, |
| }; |
| |
| static int __init fastrpc_device_init(void) |
| { |
| struct fastrpc_apps *me = &gfa; |
| struct device *dev = 0; |
| int err = 0, i; |
| |
| memset(me, 0, sizeof(*me)); |
| |
| fastrpc_init(me); |
| me->dev = NULL; |
| VERIFY(err, 0 == platform_driver_register(&fastrpc_driver)); |
| if (err) |
| goto register_bail; |
| VERIFY(err, 0 == alloc_chrdev_region(&me->dev_no, 0, NUM_CHANNELS, |
| DEVICE_NAME)); |
| if (err) |
| goto alloc_chrdev_bail; |
| cdev_init(&me->cdev, &fops); |
| me->cdev.owner = THIS_MODULE; |
| VERIFY(err, 0 == cdev_add(&me->cdev, MKDEV(MAJOR(me->dev_no), 0), |
| 1)); |
| if (err) |
| goto cdev_init_bail; |
| me->class = class_create(THIS_MODULE, "fastrpc"); |
| VERIFY(err, !IS_ERR(me->class)); |
| if (err) |
| goto class_create_bail; |
| me->compat = (fops.compat_ioctl == NULL) ? 0 : 1; |
| dev = device_create(me->class, NULL, |
| MKDEV(MAJOR(me->dev_no), 0), |
| NULL, gcinfo[0].name); |
| VERIFY(err, !IS_ERR_OR_NULL(dev)); |
| if (err) |
| goto device_create_bail; |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| me->channel[i].dev = dev; |
| me->channel[i].ssrcount = 0; |
| me->channel[i].prevssrcount = 0; |
| me->channel[i].nb.notifier_call = fastrpc_restart_notifier_cb; |
| me->channel[i].handle = subsys_notif_register_notifier( |
| gcinfo[i].subsys, |
| &me->channel[i].nb); |
| } |
| |
| me->client = msm_ion_client_create(DEVICE_NAME); |
| VERIFY(err, !IS_ERR_OR_NULL(me->client)); |
| if (err) |
| goto device_create_bail; |
| debugfs_root = debugfs_create_dir("adsprpc", NULL); |
| return 0; |
| device_create_bail: |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| if (me->channel[i].handle) |
| subsys_notif_unregister_notifier(me->channel[i].handle, |
| &me->channel[i].nb); |
| } |
| if (!IS_ERR_OR_NULL(dev)) |
| device_destroy(me->class, MKDEV(MAJOR(me->dev_no), 0)); |
| class_destroy(me->class); |
| class_create_bail: |
| cdev_del(&me->cdev); |
| cdev_init_bail: |
| unregister_chrdev_region(me->dev_no, NUM_CHANNELS); |
| alloc_chrdev_bail: |
| register_bail: |
| fastrpc_deinit(); |
| return err; |
| } |
| |
| static void __exit fastrpc_device_exit(void) |
| { |
| struct fastrpc_apps *me = &gfa; |
| int i; |
| |
| fastrpc_file_list_dtor(me); |
| fastrpc_deinit(); |
| for (i = 0; i < NUM_CHANNELS; i++) { |
| if (!gcinfo[i].name) |
| continue; |
| device_destroy(me->class, MKDEV(MAJOR(me->dev_no), i)); |
| subsys_notif_unregister_notifier(me->channel[i].handle, |
| &me->channel[i].nb); |
| } |
| class_destroy(me->class); |
| cdev_del(&me->cdev); |
| unregister_chrdev_region(me->dev_no, NUM_CHANNELS); |
| ion_client_destroy(me->client); |
| debugfs_remove_recursive(debugfs_root); |
| } |
| |
| late_initcall(fastrpc_device_init); |
| module_exit(fastrpc_device_exit); |
| |
| MODULE_LICENSE("GPL v2"); |