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Merge "msm: adsprpc: limit number of pending invocations to DSP"

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qctecmdr 2020-07-10 21:39:49 -07:00 • committed by Gerrit - the friendly Code Review server
commit 44d49eecfb
1 changed files with 24 additions and 4 deletions
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28
drivers/char/adsprpc.c
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@ -121,6 +121,9 @@
*/
#define NUM_KERNEL_AND_STATIC_ONLY_CONTEXTS (70)
/* Maximum number of pending contexts per remote session */
#define MAX_PENDING_CTX_PER_SESSION (64)
#define NUM_DEVICES 2 /* adsprpc-smd, adsprpc-smd-secure */
#define MINOR_NUM_DEV 0
#define MINOR_NUM_SECURE_DEV 1
@ -358,6 +361,8 @@ struct smq_invoke_ctx {
struct fastrpc_ctx_lst {
struct hlist_head pending;
struct hlist_head interrupted;
/* Number of active contexts queued to DSP */
uint32_t num_active_ctxs;
/* Queue which holds all async job contexts of process */
struct list_head async_queue;
};
@ -1617,6 +1622,13 @@ static int context_alloc(struct fastrpc_file *fl, uint32_t kernel,
struct fastrpc_channel_ctx *chan = NULL;
unsigned long irq_flags = 0;
spin_lock(&fl->hlock);
if (fl->clst.num_active_ctxs > MAX_PENDING_CTX_PER_SESSION) {
err = -EDQUOT;
spin_unlock(&fl->hlock);
goto bail;
}
spin_unlock(&fl->hlock);
bufs = REMOTE_SCALARS_LENGTH(invoke->sc);
size = bufs * sizeof(*ctx->lpra) + bufs * sizeof(*ctx->maps) +
sizeof(*ctx->fds) * (bufs) +
@ -1698,9 +1710,6 @@ static int context_alloc(struct fastrpc_file *fl, uint32_t kernel,
if (err)
goto bail;
}
spin_lock(&fl->hlock);
hlist_add_head(&ctx->hn, &clst->pending);
spin_unlock(&fl->hlock);
chan = &me->channel[cid];
@ -1727,6 +1736,11 @@ static int context_alloc(struct fastrpc_file *fl, uint32_t kernel,
err = -ENOKEY;
goto bail;
}
spin_lock(&fl->hlock);
hlist_add_head(&ctx->hn, &clst->pending);
clst->num_active_ctxs++;
spin_unlock(&fl->hlock);
trace_fastrpc_context_alloc((uint64_t)ctx,
ctx->ctxid | fl->pd, ctx->handle, ctx->sc);
*po = ctx;
@ -1772,7 +1786,10 @@ static void context_free(struct smq_invoke_ctx *ctx)
spin_unlock_irqrestore(&chan->ctxlock, irq_flags);
spin_lock(&ctx->fl->hlock);
hlist_del_init(&ctx->hn);
if (!hlist_unhashed(&ctx->hn)) {
hlist_del_init(&ctx->hn);
ctx->fl->clst.num_active_ctxs--;
}
spin_unlock(&ctx->fl->hlock);
mutex_lock(&ctx->fl->map_mutex);
@ -1936,6 +1953,7 @@ static void context_list_ctor(struct fastrpc_ctx_lst *me)
{
INIT_HLIST_HEAD(&me->interrupted);
INIT_HLIST_HEAD(&me->pending);
me->num_active_ctxs = 0;
INIT_LIST_HEAD(&me->async_queue);
}
@ -1950,6 +1968,7 @@ static void fastrpc_context_list_dtor(struct fastrpc_file *fl)
spin_lock(&fl->hlock);
hlist_for_each_entry_safe(ictx, n, &clst->interrupted, hn) {
hlist_del_init(&ictx->hn);
clst->num_active_ctxs--;
ctxfree = ictx;
break;
}
@ -1962,6 +1981,7 @@ static void fastrpc_context_list_dtor(struct fastrpc_file *fl)
spin_lock(&fl->hlock);
hlist_for_each_entry_safe(ictx, n, &clst->pending, hn) {
hlist_del_init(&ictx->hn);
clst->num_active_ctxs--;
ctxfree = ictx;
break;
}