1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
3 // Copyright (c) 2018, Linaro Limited
5 #include <linux/completion.h>
6 #include <linux/device.h>
7 #include <linux/dma-buf.h>
8 #include <linux/dma-mapping.h>
10 #include <linux/list.h>
11 #include <linux/miscdevice.h>
12 #include <linux/module.h>
13 #include <linux/of_address.h>
15 #include <linux/of_platform.h>
16 #include <linux/rpmsg.h>
17 #include <linux/scatterlist.h>
18 #include <linux/slab.h>
19 #include <uapi/misc/fastrpc.h>
21 #define ADSP_DOMAIN_ID (0)
22 #define MDSP_DOMAIN_ID (1)
23 #define SDSP_DOMAIN_ID (2)
24 #define CDSP_DOMAIN_ID (3)
25 #define FASTRPC_DEV_MAX 4 /* adsp, mdsp, slpi, cdsp*/
26 #define FASTRPC_MAX_SESSIONS 9 /*8 compute, 1 cpz*/
27 #define FASTRPC_ALIGN 128
28 #define FASTRPC_MAX_FDLIST 16
29 #define FASTRPC_MAX_CRCLIST 64
30 #define FASTRPC_PHYS(p) ((p) & 0xffffffff)
31 #define FASTRPC_CTX_MAX (256)
32 #define FASTRPC_INIT_HANDLE 1
33 #define FASTRPC_CTXID_MASK (0xFF0)
34 #define INIT_FILELEN_MAX (2 * 1024 * 1024)
35 #define INIT_MEMLEN_MAX (8 * 1024 * 1024)
36 #define FASTRPC_DEVICE_NAME "fastrpc"
38 /* Retrives number of input buffers from the scalars parameter */
39 #define REMOTE_SCALARS_INBUFS(sc) (((sc) >> 16) & 0x0ff)
41 /* Retrives number of output buffers from the scalars parameter */
42 #define REMOTE_SCALARS_OUTBUFS(sc) (((sc) >> 8) & 0x0ff)
44 /* Retrives number of input handles from the scalars parameter */
45 #define REMOTE_SCALARS_INHANDLES(sc) (((sc) >> 4) & 0x0f)
47 /* Retrives number of output handles from the scalars parameter */
48 #define REMOTE_SCALARS_OUTHANDLES(sc) ((sc) & 0x0f)
50 #define REMOTE_SCALARS_LENGTH(sc) (REMOTE_SCALARS_INBUFS(sc) + \
51 REMOTE_SCALARS_OUTBUFS(sc) + \
52 REMOTE_SCALARS_INHANDLES(sc)+ \
53 REMOTE_SCALARS_OUTHANDLES(sc))
54 #define FASTRPC_BUILD_SCALARS(attr, method, in, out, oin, oout) \
55 (((attr & 0x07) << 29) | \
56 ((method & 0x1f) << 24) | \
57 ((in & 0xff) << 16) | \
58 ((out & 0xff) << 8) | \
59 ((oin & 0x0f) << 4) | \
62 #define FASTRPC_SCALARS(method, in, out) \
63 FASTRPC_BUILD_SCALARS(0, method, in, out, 0, 0)
65 #define FASTRPC_CREATE_PROCESS_NARGS 6
66 /* Remote Method id table */
67 #define FASTRPC_RMID_INIT_ATTACH 0
68 #define FASTRPC_RMID_INIT_RELEASE 1
69 #define FASTRPC_RMID_INIT_CREATE 6
70 #define FASTRPC_RMID_INIT_CREATE_ATTR 7
71 #define FASTRPC_RMID_INIT_CREATE_STATIC 8
73 #define miscdev_to_cctx(d) container_of(d, struct fastrpc_channel_ctx, miscdev)
75 static const char *domains[FASTRPC_DEV_MAX] = { "adsp", "mdsp",
77 struct fastrpc_phy_page {
78 u64 addr; /* physical address */
79 u64 size; /* size of contiguous region */
82 struct fastrpc_invoke_buf {
83 u32 num; /* number of contiguous regions */
84 u32 pgidx; /* index to start of contiguous region */
87 struct fastrpc_remote_arg {
93 int pid; /* process group id */
94 int tid; /* thread id */
95 u64 ctx; /* invoke caller context */
96 u32 handle; /* handle to invoke */
97 u32 sc; /* scalars structure describing the data */
98 u64 addr; /* physical address */
99 u64 size; /* size of contiguous region */
102 struct fastrpc_invoke_rsp {
103 u64 ctx; /* invoke caller context */
104 int retval; /* invoke return value */
108 struct fastrpc_user *fl;
109 struct dma_buf *dmabuf;
114 /* Lock for dma buf attachments */
116 struct list_head attachments;
119 struct fastrpc_dma_buf_attachment {
122 struct list_head node;
126 struct list_head node;
127 struct fastrpc_user *fl;
130 struct sg_table *table;
131 struct dma_buf_attachment *attach;
136 struct kref refcount;
139 struct fastrpc_invoke_ctx {
149 struct kref refcount;
150 struct list_head node; /* list of ctxs */
151 struct completion work;
152 struct fastrpc_msg msg;
153 struct fastrpc_user *fl;
154 struct fastrpc_remote_arg *rpra;
155 struct fastrpc_map **maps;
156 struct fastrpc_buf *buf;
157 struct fastrpc_invoke_args *args;
158 struct fastrpc_channel_ctx *cctx;
161 struct fastrpc_session_ctx {
168 struct fastrpc_channel_ctx {
171 struct rpmsg_device *rpdev;
172 struct fastrpc_session_ctx session[FASTRPC_MAX_SESSIONS];
175 struct list_head users;
176 struct miscdevice miscdev;
179 struct fastrpc_user {
180 struct list_head user;
181 struct list_head maps;
182 struct list_head pending;
184 struct fastrpc_channel_ctx *cctx;
185 struct fastrpc_session_ctx *sctx;
186 struct fastrpc_buf *init_mem;
192 /* lock for allocations */
196 static void fastrpc_free_map(struct kref *ref)
198 struct fastrpc_map *map;
200 map = container_of(ref, struct fastrpc_map, refcount);
203 dma_buf_unmap_attachment(map->attach, map->table,
205 dma_buf_detach(map->buf, map->attach);
206 dma_buf_put(map->buf);
212 static void fastrpc_map_put(struct fastrpc_map *map)
215 kref_put(&map->refcount, fastrpc_free_map);
218 static void fastrpc_map_get(struct fastrpc_map *map)
221 kref_get(&map->refcount);
224 static int fastrpc_map_find(struct fastrpc_user *fl, int fd,
225 struct fastrpc_map **ppmap)
227 struct fastrpc_map *map = NULL;
229 mutex_lock(&fl->mutex);
230 list_for_each_entry(map, &fl->maps, node) {
232 fastrpc_map_get(map);
234 mutex_unlock(&fl->mutex);
238 mutex_unlock(&fl->mutex);
243 static void fastrpc_buf_free(struct fastrpc_buf *buf)
245 dma_free_coherent(buf->dev, buf->size, buf->virt,
246 FASTRPC_PHYS(buf->phys));
250 static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
251 u64 size, struct fastrpc_buf **obuf)
253 struct fastrpc_buf *buf;
255 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
259 INIT_LIST_HEAD(&buf->attachments);
260 mutex_init(&buf->lock);
268 buf->virt = dma_alloc_coherent(dev, buf->size, (dma_addr_t *)&buf->phys,
273 if (fl->sctx && fl->sctx->sid)
274 buf->phys += ((u64)fl->sctx->sid << 32);
281 static void fastrpc_context_free(struct kref *ref)
283 struct fastrpc_invoke_ctx *ctx;
284 struct fastrpc_channel_ctx *cctx;
287 ctx = container_of(ref, struct fastrpc_invoke_ctx, refcount);
290 for (i = 0; i < ctx->nscalars; i++)
291 fastrpc_map_put(ctx->maps[i]);
294 fastrpc_buf_free(ctx->buf);
296 spin_lock(&cctx->lock);
297 idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);
298 spin_unlock(&cctx->lock);
304 static void fastrpc_context_get(struct fastrpc_invoke_ctx *ctx)
306 kref_get(&ctx->refcount);
309 static void fastrpc_context_put(struct fastrpc_invoke_ctx *ctx)
311 kref_put(&ctx->refcount, fastrpc_context_free);
314 static struct fastrpc_invoke_ctx *fastrpc_context_alloc(
315 struct fastrpc_user *user, u32 kernel, u32 sc,
316 struct fastrpc_invoke_args *args)
318 struct fastrpc_channel_ctx *cctx = user->cctx;
319 struct fastrpc_invoke_ctx *ctx = NULL;
322 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
324 return ERR_PTR(-ENOMEM);
326 INIT_LIST_HEAD(&ctx->node);
328 ctx->nscalars = REMOTE_SCALARS_LENGTH(sc);
329 ctx->nbufs = REMOTE_SCALARS_INBUFS(sc) +
330 REMOTE_SCALARS_OUTBUFS(sc);
333 ctx->maps = kcalloc(ctx->nscalars,
334 sizeof(*ctx->maps), GFP_KERNEL);
337 return ERR_PTR(-ENOMEM);
344 ctx->pid = current->pid;
345 ctx->tgid = user->tgid;
347 init_completion(&ctx->work);
349 spin_lock(&user->lock);
350 list_add_tail(&ctx->node, &user->pending);
351 spin_unlock(&user->lock);
353 spin_lock(&cctx->lock);
354 ret = idr_alloc_cyclic(&cctx->ctx_idr, ctx, 1,
355 FASTRPC_CTX_MAX, GFP_ATOMIC);
357 spin_unlock(&cctx->lock);
360 ctx->ctxid = ret << 4;
361 spin_unlock(&cctx->lock);
363 kref_init(&ctx->refcount);
367 spin_lock(&user->lock);
368 list_del(&ctx->node);
369 spin_unlock(&user->lock);
376 static struct sg_table *
377 fastrpc_map_dma_buf(struct dma_buf_attachment *attachment,
378 enum dma_data_direction dir)
380 struct fastrpc_dma_buf_attachment *a = attachment->priv;
381 struct sg_table *table;
385 if (!dma_map_sg(attachment->dev, table->sgl, table->nents, dir))
386 return ERR_PTR(-ENOMEM);
391 static void fastrpc_unmap_dma_buf(struct dma_buf_attachment *attach,
392 struct sg_table *table,
393 enum dma_data_direction dir)
395 dma_unmap_sg(attach->dev, table->sgl, table->nents, dir);
398 static void fastrpc_release(struct dma_buf *dmabuf)
400 struct fastrpc_buf *buffer = dmabuf->priv;
402 fastrpc_buf_free(buffer);
405 static int fastrpc_dma_buf_attach(struct dma_buf *dmabuf,
406 struct dma_buf_attachment *attachment)
408 struct fastrpc_dma_buf_attachment *a;
409 struct fastrpc_buf *buffer = dmabuf->priv;
412 a = kzalloc(sizeof(*a), GFP_KERNEL);
416 ret = dma_get_sgtable(buffer->dev, &a->sgt, buffer->virt,
417 FASTRPC_PHYS(buffer->phys), buffer->size);
419 dev_err(buffer->dev, "failed to get scatterlist from DMA API\n");
423 a->dev = attachment->dev;
424 INIT_LIST_HEAD(&a->node);
425 attachment->priv = a;
427 mutex_lock(&buffer->lock);
428 list_add(&a->node, &buffer->attachments);
429 mutex_unlock(&buffer->lock);
434 static void fastrpc_dma_buf_detatch(struct dma_buf *dmabuf,
435 struct dma_buf_attachment *attachment)
437 struct fastrpc_dma_buf_attachment *a = attachment->priv;
438 struct fastrpc_buf *buffer = dmabuf->priv;
440 mutex_lock(&buffer->lock);
442 mutex_unlock(&buffer->lock);
446 static void *fastrpc_kmap(struct dma_buf *dmabuf, unsigned long pgnum)
448 struct fastrpc_buf *buf = dmabuf->priv;
450 return buf->virt ? buf->virt + pgnum * PAGE_SIZE : NULL;
453 static void *fastrpc_vmap(struct dma_buf *dmabuf)
455 struct fastrpc_buf *buf = dmabuf->priv;
460 static int fastrpc_mmap(struct dma_buf *dmabuf,
461 struct vm_area_struct *vma)
463 struct fastrpc_buf *buf = dmabuf->priv;
464 size_t size = vma->vm_end - vma->vm_start;
466 return dma_mmap_coherent(buf->dev, vma, buf->virt,
467 FASTRPC_PHYS(buf->phys), size);
470 static const struct dma_buf_ops fastrpc_dma_buf_ops = {
471 .attach = fastrpc_dma_buf_attach,
472 .detach = fastrpc_dma_buf_detatch,
473 .map_dma_buf = fastrpc_map_dma_buf,
474 .unmap_dma_buf = fastrpc_unmap_dma_buf,
475 .mmap = fastrpc_mmap,
477 .vmap = fastrpc_vmap,
478 .release = fastrpc_release,
481 static int fastrpc_map_create(struct fastrpc_user *fl, int fd,
482 u64 len, struct fastrpc_map **ppmap)
484 struct fastrpc_session_ctx *sess = fl->sctx;
485 struct fastrpc_map *map = NULL;
488 if (!fastrpc_map_find(fl, fd, ppmap))
491 map = kzalloc(sizeof(*map), GFP_KERNEL);
495 INIT_LIST_HEAD(&map->node);
498 map->buf = dma_buf_get(fd);
499 if (IS_ERR(map->buf)) {
500 err = PTR_ERR(map->buf);
504 map->attach = dma_buf_attach(map->buf, sess->dev);
505 if (IS_ERR(map->attach)) {
506 dev_err(sess->dev, "Failed to attach dmabuf\n");
507 err = PTR_ERR(map->attach);
511 map->table = dma_buf_map_attachment(map->attach, DMA_BIDIRECTIONAL);
512 if (IS_ERR(map->table)) {
513 err = PTR_ERR(map->table);
517 map->phys = sg_dma_address(map->table->sgl);
518 map->phys += ((u64)fl->sctx->sid << 32);
520 map->va = sg_virt(map->table->sgl);
522 kref_init(&map->refcount);
524 spin_lock(&fl->lock);
525 list_add_tail(&map->node, &fl->maps);
526 spin_unlock(&fl->lock);
532 dma_buf_detach(map->buf, map->attach);
534 dma_buf_put(map->buf);
542 * Fastrpc payload buffer with metadata looks like:
544 * >>>>>> START of METADATA <<<<<<<<<
545 * +---------------------------------+
547 * | type:(struct fastrpc_remote_arg)|
549 * +---------------------------------+
550 * | Invoke Buffer list |
551 * | type:(struct fastrpc_invoke_buf)|
553 * +---------------------------------+
555 * | type:(struct fastrpc_phy_page) |
557 * +---------------------------------+
559 * |(can be specific to SoC/Firmware)|
560 * +---------------------------------+
561 * >>>>>>>> END of METADATA <<<<<<<<<
562 * +---------------------------------+
565 * +---------------------------------+
568 static int fastrpc_get_meta_size(struct fastrpc_invoke_ctx *ctx)
572 size = (sizeof(struct fastrpc_remote_arg) +
573 sizeof(struct fastrpc_invoke_buf) +
574 sizeof(struct fastrpc_phy_page)) * ctx->nscalars +
575 sizeof(u64) * FASTRPC_MAX_FDLIST +
576 sizeof(u32) * FASTRPC_MAX_CRCLIST;
581 static u64 fastrpc_get_payload_size(struct fastrpc_invoke_ctx *ctx, int metalen)
586 size = ALIGN(metalen, FASTRPC_ALIGN);
587 for (i = 0; i < ctx->nscalars; i++) {
588 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1) {
589 size = ALIGN(size, FASTRPC_ALIGN);
590 size += ctx->args[i].length;
597 static int fastrpc_create_maps(struct fastrpc_invoke_ctx *ctx)
599 struct device *dev = ctx->fl->sctx->dev;
602 for (i = 0; i < ctx->nscalars; ++i) {
603 /* Make sure reserved field is set to 0 */
604 if (ctx->args[i].reserved)
607 if (ctx->args[i].fd == 0 || ctx->args[i].fd == -1 ||
608 ctx->args[i].length == 0)
611 err = fastrpc_map_create(ctx->fl, ctx->args[i].fd,
612 ctx->args[i].length, &ctx->maps[i]);
614 dev_err(dev, "Error Creating map %d\n", err);
622 static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx)
624 struct device *dev = ctx->fl->sctx->dev;
625 struct fastrpc_remote_arg *rpra;
626 struct fastrpc_invoke_buf *list;
627 struct fastrpc_phy_page *pages;
628 int inbufs, i, err = 0;
634 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
635 metalen = fastrpc_get_meta_size(ctx);
636 pkt_size = fastrpc_get_payload_size(ctx, metalen);
638 err = fastrpc_create_maps(ctx);
642 ctx->msg_sz = pkt_size;
644 err = fastrpc_buf_alloc(ctx->fl, dev, pkt_size, &ctx->buf);
648 rpra = ctx->buf->virt;
649 list = ctx->buf->virt + ctx->nscalars * sizeof(*rpra);
650 pages = ctx->buf->virt + ctx->nscalars * (sizeof(*list) +
652 args = (uintptr_t)ctx->buf->virt + metalen;
653 rlen = pkt_size - metalen;
656 for (i = 0; i < ctx->nbufs; ++i) {
657 u64 len = ctx->args[i].length;
661 list[i].num = len ? 1 : 0;
667 pages[i].size = roundup(len, PAGE_SIZE);
670 rpra[i].pv = (u64) ctx->args[i].ptr;
671 pages[i].addr = ctx->maps[i]->phys;
673 rlen -= ALIGN(args, FASTRPC_ALIGN) - args;
674 args = ALIGN(args, FASTRPC_ALIGN);
679 pages[i].addr = ctx->buf->phys + (pkt_size - rlen);
680 pages[i].addr = pages[i].addr & PAGE_MASK;
685 if (i < inbufs && !ctx->maps[i]) {
686 void *dst = (void *)(uintptr_t)rpra[i].pv;
687 void *src = (void *)(uintptr_t)ctx->args[i].ptr;
690 if (copy_from_user(dst, (void __user *)src,
696 memcpy(dst, src, len);
701 for (i = ctx->nbufs; i < ctx->nscalars; ++i) {
702 rpra[i].pv = (u64) ctx->args[i].ptr;
703 rpra[i].len = ctx->args[i].length;
704 list[i].num = ctx->args[i].length ? 1 : 0;
706 pages[i].addr = ctx->maps[i]->phys;
707 pages[i].size = ctx->maps[i]->size;
712 dev_err(dev, "Error: get invoke args failed:%d\n", err);
717 static int fastrpc_put_args(struct fastrpc_invoke_ctx *ctx,
720 struct fastrpc_remote_arg *rpra = ctx->rpra;
723 inbufs = REMOTE_SCALARS_INBUFS(ctx->sc);
725 for (i = inbufs; i < ctx->nbufs; ++i) {
726 void *src = (void *)(uintptr_t)rpra[i].pv;
727 void *dst = (void *)(uintptr_t)ctx->args[i].ptr;
728 u64 len = rpra[i].len;
731 if (copy_to_user((void __user *)dst, src, len))
734 memcpy(dst, src, len);
741 static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,
742 struct fastrpc_invoke_ctx *ctx,
743 u32 kernel, uint32_t handle)
745 struct fastrpc_channel_ctx *cctx;
746 struct fastrpc_user *fl = ctx->fl;
747 struct fastrpc_msg *msg = &ctx->msg;
751 msg->tid = current->pid;
756 msg->ctx = ctx->ctxid | fl->pd;
757 msg->handle = handle;
759 msg->addr = ctx->buf ? ctx->buf->phys : 0;
760 msg->size = roundup(ctx->msg_sz, PAGE_SIZE);
761 fastrpc_context_get(ctx);
763 return rpmsg_send(cctx->rpdev->ept, (void *)msg, sizeof(*msg));
766 static int fastrpc_internal_invoke(struct fastrpc_user *fl, u32 kernel,
768 struct fastrpc_invoke_args *args)
770 struct fastrpc_invoke_ctx *ctx = NULL;
776 ctx = fastrpc_context_alloc(fl, kernel, sc, args);
781 err = fastrpc_get_args(kernel, ctx);
785 /* Send invoke buffer to remote dsp */
786 err = fastrpc_invoke_send(fl->sctx, ctx, kernel, handle);
790 /* Wait for remote dsp to respond or time out */
791 err = wait_for_completion_interruptible(&ctx->work);
795 /* Check the response from remote dsp */
801 /* populate all the output buffers with results */
802 err = fastrpc_put_args(ctx, kernel);
808 /* We are done with this compute context, remove it from pending list */
809 spin_lock(&fl->lock);
810 list_del(&ctx->node);
811 spin_unlock(&fl->lock);
812 fastrpc_context_put(ctx);
815 dev_dbg(fl->sctx->dev, "Error: Invoke Failed %d\n", err);
820 static int fastrpc_init_create_process(struct fastrpc_user *fl,
823 struct fastrpc_init_create init;
824 struct fastrpc_invoke_args *args;
825 struct fastrpc_phy_page pages[1];
826 struct fastrpc_map *map = NULL;
827 struct fastrpc_buf *imem = NULL;
840 args = kcalloc(FASTRPC_CREATE_PROCESS_NARGS, sizeof(*args), GFP_KERNEL);
844 if (copy_from_user(&init, argp, sizeof(init))) {
849 if (init.filelen > INIT_FILELEN_MAX) {
854 inbuf.pgid = fl->tgid;
855 inbuf.namelen = strlen(current->comm) + 1;
856 inbuf.filelen = init.filelen;
858 inbuf.attrs = init.attrs;
859 inbuf.siglen = init.siglen;
862 if (init.filelen && init.filefd) {
863 err = fastrpc_map_create(fl, init.filefd, init.filelen, &map);
868 memlen = ALIGN(max(INIT_FILELEN_MAX, (int)init.filelen * 4),
870 err = fastrpc_buf_alloc(fl, fl->sctx->dev, memlen,
873 fastrpc_map_put(map);
878 args[0].ptr = (u64)(uintptr_t)&inbuf;
879 args[0].length = sizeof(inbuf);
882 args[1].ptr = (u64)(uintptr_t)current->comm;
883 args[1].length = inbuf.namelen;
886 args[2].ptr = (u64) init.file;
887 args[2].length = inbuf.filelen;
888 args[2].fd = init.filefd;
890 pages[0].addr = imem->phys;
891 pages[0].size = imem->size;
893 args[3].ptr = (u64)(uintptr_t) pages;
894 args[3].length = 1 * sizeof(*pages);
897 args[4].ptr = (u64)(uintptr_t)&inbuf.attrs;
898 args[4].length = sizeof(inbuf.attrs);
901 args[5].ptr = (u64)(uintptr_t) &inbuf.siglen;
902 args[5].length = sizeof(inbuf.siglen);
905 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE, 4, 0);
907 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_CREATE_ATTR, 6, 0);
909 err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
913 fastrpc_map_put(map);
914 fastrpc_buf_free(imem);
923 static struct fastrpc_session_ctx *fastrpc_session_alloc(
924 struct fastrpc_channel_ctx *cctx)
926 struct fastrpc_session_ctx *session = NULL;
929 spin_lock(&cctx->lock);
930 for (i = 0; i < cctx->sesscount; i++) {
931 if (!cctx->session[i].used && cctx->session[i].valid) {
932 cctx->session[i].used = true;
933 session = &cctx->session[i];
937 spin_unlock(&cctx->lock);
942 static void fastrpc_session_free(struct fastrpc_channel_ctx *cctx,
943 struct fastrpc_session_ctx *session)
945 spin_lock(&cctx->lock);
946 session->used = false;
947 spin_unlock(&cctx->lock);
950 static int fastrpc_release_current_dsp_process(struct fastrpc_user *fl)
952 struct fastrpc_invoke_args args[1];
957 args[0].ptr = (u64)(uintptr_t) &tgid;
958 args[0].length = sizeof(tgid);
960 args[0].reserved = 0;
961 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_RELEASE, 1, 0);
963 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
967 static int fastrpc_device_release(struct inode *inode, struct file *file)
969 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
970 struct fastrpc_channel_ctx *cctx = fl->cctx;
971 struct fastrpc_invoke_ctx *ctx, *n;
972 struct fastrpc_map *map, *m;
974 fastrpc_release_current_dsp_process(fl);
976 spin_lock(&cctx->lock);
978 spin_unlock(&cctx->lock);
981 fastrpc_buf_free(fl->init_mem);
983 list_for_each_entry_safe(ctx, n, &fl->pending, node) {
984 list_del(&ctx->node);
985 fastrpc_context_put(ctx);
988 list_for_each_entry_safe(map, m, &fl->maps, node) {
989 list_del(&map->node);
990 fastrpc_map_put(map);
993 fastrpc_session_free(cctx, fl->sctx);
995 mutex_destroy(&fl->mutex);
997 file->private_data = NULL;
1002 static int fastrpc_device_open(struct inode *inode, struct file *filp)
1004 struct fastrpc_channel_ctx *cctx = miscdev_to_cctx(filp->private_data);
1005 struct fastrpc_user *fl = NULL;
1007 fl = kzalloc(sizeof(*fl), GFP_KERNEL);
1011 filp->private_data = fl;
1012 spin_lock_init(&fl->lock);
1013 mutex_init(&fl->mutex);
1014 INIT_LIST_HEAD(&fl->pending);
1015 INIT_LIST_HEAD(&fl->maps);
1016 INIT_LIST_HEAD(&fl->user);
1017 fl->tgid = current->tgid;
1020 fl->sctx = fastrpc_session_alloc(cctx);
1022 dev_err(&cctx->rpdev->dev, "No session available\n");
1023 mutex_destroy(&fl->mutex);
1029 spin_lock(&cctx->lock);
1030 list_add_tail(&fl->user, &cctx->users);
1031 spin_unlock(&cctx->lock);
1036 static int fastrpc_dmabuf_free(struct fastrpc_user *fl, char __user *argp)
1038 struct dma_buf *buf;
1041 if (copy_from_user(&info, argp, sizeof(info)))
1044 buf = dma_buf_get(info);
1045 if (IS_ERR_OR_NULL(buf))
1048 * one for the last get and other for the ALLOC_DMA_BUFF ioctl
1056 static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
1058 struct fastrpc_alloc_dma_buf bp;
1059 DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
1060 struct fastrpc_buf *buf = NULL;
1063 if (copy_from_user(&bp, argp, sizeof(bp)))
1066 err = fastrpc_buf_alloc(fl, fl->sctx->dev, bp.size, &buf);
1069 exp_info.ops = &fastrpc_dma_buf_ops;
1070 exp_info.size = bp.size;
1071 exp_info.flags = O_RDWR;
1072 exp_info.priv = buf;
1073 buf->dmabuf = dma_buf_export(&exp_info);
1074 if (IS_ERR(buf->dmabuf)) {
1075 err = PTR_ERR(buf->dmabuf);
1076 fastrpc_buf_free(buf);
1080 bp.fd = dma_buf_fd(buf->dmabuf, O_ACCMODE);
1082 dma_buf_put(buf->dmabuf);
1086 if (copy_to_user(argp, &bp, sizeof(bp))) {
1087 dma_buf_put(buf->dmabuf);
1091 get_dma_buf(buf->dmabuf);
1096 static int fastrpc_init_attach(struct fastrpc_user *fl)
1098 struct fastrpc_invoke_args args[1];
1099 int tgid = fl->tgid;
1102 args[0].ptr = (u64)(uintptr_t) &tgid;
1103 args[0].length = sizeof(tgid);
1105 args[0].reserved = 0;
1106 sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
1109 return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
1113 static int fastrpc_invoke(struct fastrpc_user *fl, char __user *argp)
1115 struct fastrpc_invoke_args *args = NULL;
1116 struct fastrpc_invoke inv;
1120 if (copy_from_user(&inv, argp, sizeof(inv)))
1123 /* nscalars is truncated here to max supported value */
1124 nscalars = REMOTE_SCALARS_LENGTH(inv.sc);
1126 args = kcalloc(nscalars, sizeof(*args), GFP_KERNEL);
1130 if (copy_from_user(args, (void __user *)(uintptr_t)inv.args,
1131 nscalars * sizeof(*args))) {
1137 err = fastrpc_internal_invoke(fl, false, inv.handle, inv.sc, args);
1143 static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
1146 struct fastrpc_user *fl = (struct fastrpc_user *)file->private_data;
1147 char __user *argp = (char __user *)arg;
1151 case FASTRPC_IOCTL_INVOKE:
1152 err = fastrpc_invoke(fl, argp);
1154 case FASTRPC_IOCTL_INIT_ATTACH:
1155 err = fastrpc_init_attach(fl);
1157 case FASTRPC_IOCTL_INIT_CREATE:
1158 err = fastrpc_init_create_process(fl, argp);
1160 case FASTRPC_IOCTL_FREE_DMA_BUFF:
1161 err = fastrpc_dmabuf_free(fl, argp);
1163 case FASTRPC_IOCTL_ALLOC_DMA_BUFF:
1164 err = fastrpc_dmabuf_alloc(fl, argp);
1174 static const struct file_operations fastrpc_fops = {
1175 .open = fastrpc_device_open,
1176 .release = fastrpc_device_release,
1177 .unlocked_ioctl = fastrpc_device_ioctl,
1178 .compat_ioctl = fastrpc_device_ioctl,
1181 static int fastrpc_cb_probe(struct platform_device *pdev)
1183 struct fastrpc_channel_ctx *cctx;
1184 struct fastrpc_session_ctx *sess;
1185 struct device *dev = &pdev->dev;
1186 int i, sessions = 0;
1188 cctx = dev_get_drvdata(dev->parent);
1192 of_property_read_u32(dev->of_node, "qcom,nsessions", &sessions);
1194 spin_lock(&cctx->lock);
1195 sess = &cctx->session[cctx->sesscount];
1199 dev_set_drvdata(dev, sess);
1201 if (of_property_read_u32(dev->of_node, "reg", &sess->sid))
1202 dev_info(dev, "FastRPC Session ID not specified in DT\n");
1205 struct fastrpc_session_ctx *dup_sess;
1207 for (i = 1; i < sessions; i++) {
1208 if (cctx->sesscount++ >= FASTRPC_MAX_SESSIONS)
1210 dup_sess = &cctx->session[cctx->sesscount];
1211 memcpy(dup_sess, sess, sizeof(*dup_sess));
1215 spin_unlock(&cctx->lock);
1216 dma_set_mask(dev, DMA_BIT_MASK(32));
1221 static int fastrpc_cb_remove(struct platform_device *pdev)
1223 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent);
1224 struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev);
1227 spin_lock(&cctx->lock);
1228 for (i = 1; i < FASTRPC_MAX_SESSIONS; i++) {
1229 if (cctx->session[i].sid == sess->sid) {
1230 cctx->session[i].valid = false;
1234 spin_unlock(&cctx->lock);
1239 static const struct of_device_id fastrpc_match_table[] = {
1240 { .compatible = "qcom,fastrpc-compute-cb", },
1244 static struct platform_driver fastrpc_cb_driver = {
1245 .probe = fastrpc_cb_probe,
1246 .remove = fastrpc_cb_remove,
1248 .name = "qcom,fastrpc-cb",
1249 .of_match_table = fastrpc_match_table,
1250 .suppress_bind_attrs = true,
1254 static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
1256 struct device *rdev = &rpdev->dev;
1257 struct fastrpc_channel_ctx *data;
1258 int i, err, domain_id = -1;
1261 data = devm_kzalloc(rdev, sizeof(*data), GFP_KERNEL);
1265 err = of_property_read_string(rdev->of_node, "label", &domain);
1267 dev_info(rdev, "FastRPC Domain not specified in DT\n");
1271 for (i = 0; i <= CDSP_DOMAIN_ID; i++) {
1272 if (!strcmp(domains[i], domain)) {
1278 if (domain_id < 0) {
1279 dev_info(rdev, "FastRPC Invalid Domain ID %d\n", domain_id);
1283 data->miscdev.minor = MISC_DYNAMIC_MINOR;
1284 data->miscdev.name = kasprintf(GFP_KERNEL, "fastrpc-%s",
1285 domains[domain_id]);
1286 data->miscdev.fops = &fastrpc_fops;
1287 err = misc_register(&data->miscdev);
1291 dev_set_drvdata(&rpdev->dev, data);
1292 dma_set_mask_and_coherent(rdev, DMA_BIT_MASK(32));
1293 INIT_LIST_HEAD(&data->users);
1294 spin_lock_init(&data->lock);
1295 idr_init(&data->ctx_idr);
1296 data->domain_id = domain_id;
1297 data->rpdev = rpdev;
1299 return of_platform_populate(rdev->of_node, NULL, NULL, rdev);
1302 static void fastrpc_notify_users(struct fastrpc_user *user)
1304 struct fastrpc_invoke_ctx *ctx;
1306 spin_lock(&user->lock);
1307 list_for_each_entry(ctx, &user->pending, node)
1308 complete(&ctx->work);
1309 spin_unlock(&user->lock);
1312 static void fastrpc_rpmsg_remove(struct rpmsg_device *rpdev)
1314 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
1315 struct fastrpc_user *user;
1317 spin_lock(&cctx->lock);
1318 list_for_each_entry(user, &cctx->users, user)
1319 fastrpc_notify_users(user);
1320 spin_unlock(&cctx->lock);
1322 misc_deregister(&cctx->miscdev);
1323 of_platform_depopulate(&rpdev->dev);
1327 static int fastrpc_rpmsg_callback(struct rpmsg_device *rpdev, void *data,
1328 int len, void *priv, u32 addr)
1330 struct fastrpc_channel_ctx *cctx = dev_get_drvdata(&rpdev->dev);
1331 struct fastrpc_invoke_rsp *rsp = data;
1332 struct fastrpc_invoke_ctx *ctx;
1333 unsigned long flags;
1334 unsigned long ctxid;
1336 if (len < sizeof(*rsp))
1339 ctxid = ((rsp->ctx & FASTRPC_CTXID_MASK) >> 4);
1341 spin_lock_irqsave(&cctx->lock, flags);
1342 ctx = idr_find(&cctx->ctx_idr, ctxid);
1343 spin_unlock_irqrestore(&cctx->lock, flags);
1346 dev_err(&rpdev->dev, "No context ID matches response\n");
1350 ctx->retval = rsp->retval;
1351 complete(&ctx->work);
1352 fastrpc_context_put(ctx);
1357 static const struct of_device_id fastrpc_rpmsg_of_match[] = {
1358 { .compatible = "qcom,fastrpc" },
1361 MODULE_DEVICE_TABLE(of, fastrpc_rpmsg_of_match);
1363 static struct rpmsg_driver fastrpc_driver = {
1364 .probe = fastrpc_rpmsg_probe,
1365 .remove = fastrpc_rpmsg_remove,
1366 .callback = fastrpc_rpmsg_callback,
1368 .name = "qcom,fastrpc",
1369 .of_match_table = fastrpc_rpmsg_of_match,
1373 static int fastrpc_init(void)
1377 ret = platform_driver_register(&fastrpc_cb_driver);
1379 pr_err("fastrpc: failed to register cb driver\n");
1383 ret = register_rpmsg_driver(&fastrpc_driver);
1385 pr_err("fastrpc: failed to register rpmsg driver\n");
1386 platform_driver_unregister(&fastrpc_cb_driver);
1392 module_init(fastrpc_init);
1394 static void fastrpc_exit(void)
1396 platform_driver_unregister(&fastrpc_cb_driver);
1397 unregister_rpmsg_driver(&fastrpc_driver);
1399 module_exit(fastrpc_exit);
1401 MODULE_LICENSE("GPL v2");