diag: Set the diag write buffers to busy state on channel close
Set the diag forward write buffers to busy state when glink diag channel receives remote disconnected event. Change-Id: I3c9422f3a790c0c1633ab64d4213a088faaeb9e5 Signed-off-by: Sreelakshmi Gownipalli <sgownipa@codeaurora.org>
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2d6dc48e83
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bddd67fc5c
3 changed files with 29 additions and 12 deletions
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@ -455,6 +455,8 @@ static void diag_glink_transport_notify_state(void *handle, const void *priv,
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"%s received channel remote disconnect for periph:%d\n",
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glink_info->name, glink_info->peripheral);
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atomic_set(&glink_info->opened, 0);
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diagfwd_channel_close(glink_info->fwd_ctxt);
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atomic_set(&glink_info->tx_intent_ready, 0);
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break;
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default:
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DIAG_LOG(DIAG_DEBUG_PERIPHERALS,
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@ -501,6 +503,7 @@ static void diag_glink_close_work_fn(struct work_struct *work)
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glink_close(glink_info->hdl);
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atomic_set(&glink_info->opened, 0);
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atomic_set(&glink_info->tx_intent_ready, 0);
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glink_info->hdl = NULL;
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diagfwd_channel_close(glink_info->fwd_ctxt);
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}
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@ -438,6 +438,7 @@ int diagfwd_peripheral_init(void)
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fwd_info->read_bytes = 0;
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fwd_info->write_bytes = 0;
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spin_lock_init(&fwd_info->buf_lock);
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spin_lock_init(&fwd_info->write_buf_lock);
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mutex_init(&fwd_info->data_mutex);
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}
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}
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@ -453,6 +454,7 @@ int diagfwd_peripheral_init(void)
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fwd_info->read_bytes = 0;
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fwd_info->write_bytes = 0;
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spin_lock_init(&fwd_info->buf_lock);
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spin_lock_init(&fwd_info->write_buf_lock);
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mutex_init(&fwd_info->data_mutex);
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/*
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* This state shouldn't be set for Control channels
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@ -686,16 +688,19 @@ void *diagfwd_request_write_buf(struct diagfwd_info *fwd_info)
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{
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void *buf = NULL;
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int index;
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unsigned long flags;
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spin_lock_irqsave(&fwd_info->write_buf_lock, flags);
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for (index = 0 ; index < NUM_WRITE_BUFFERS; index++) {
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if (!atomic_read(&(fwd_info->buf_ptr[index]->in_busy))) {
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atomic_set(&(fwd_info->buf_ptr[index]->in_busy), 1);
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buf = fwd_info->buf_ptr[index]->data;
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if (!buf)
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return NULL;
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atomic_set(&(fwd_info->buf_ptr[index]->in_busy), 1);
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break;
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}
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}
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spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags);
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return buf;
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}
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@ -760,7 +765,6 @@ int diagfwd_write(uint8_t peripheral, uint8_t type, void *buf, int len)
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static void __diag_fwd_open(struct diagfwd_info *fwd_info)
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{
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int i;
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if (!fwd_info)
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return;
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@ -775,10 +779,7 @@ static void __diag_fwd_open(struct diagfwd_info *fwd_info)
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if (fwd_info->p_ops && fwd_info->p_ops->open)
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fwd_info->p_ops->open(fwd_info->ctxt);
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for (i = 0; i < NUM_WRITE_BUFFERS; i++) {
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if (fwd_info->buf_ptr[i])
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atomic_set(&fwd_info->buf_ptr[i]->in_busy, 0);
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}
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diagfwd_queue_read(fwd_info);
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}
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@ -839,6 +840,7 @@ void diagfwd_close(uint8_t peripheral, uint8_t type)
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int diagfwd_channel_open(struct diagfwd_info *fwd_info)
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{
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int i;
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if (!fwd_info)
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return -EIO;
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@ -859,6 +861,10 @@ int diagfwd_channel_open(struct diagfwd_info *fwd_info)
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diagfwd_write_buffers_init(fwd_info);
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if (fwd_info && fwd_info->c_ops && fwd_info->c_ops->open)
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fwd_info->c_ops->open(fwd_info);
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for (i = 0; i < NUM_WRITE_BUFFERS; i++) {
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if (fwd_info->buf_ptr[i])
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atomic_set(&fwd_info->buf_ptr[i]->in_busy, 0);
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}
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diagfwd_queue_read(fwd_info);
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DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered opened\n",
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fwd_info->peripheral, fwd_info->type);
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@ -873,6 +879,7 @@ int diagfwd_channel_open(struct diagfwd_info *fwd_info)
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int diagfwd_channel_close(struct diagfwd_info *fwd_info)
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{
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int i;
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if (!fwd_info)
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return -EIO;
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@ -885,6 +892,10 @@ int diagfwd_channel_close(struct diagfwd_info *fwd_info)
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if (fwd_info->buf_2 && fwd_info->buf_2->data)
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atomic_set(&fwd_info->buf_2->in_busy, 0);
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for (i = 0; i < NUM_WRITE_BUFFERS; i++) {
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if (fwd_info->buf_ptr[i])
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atomic_set(&fwd_info->buf_ptr[i]->in_busy, 1);
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}
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DIAG_LOG(DIAG_DEBUG_PERIPHERALS, "p: %d t: %d considered closed\n",
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fwd_info->peripheral, fwd_info->type);
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@ -940,10 +951,11 @@ int diagfwd_write_buffer_done(struct diagfwd_info *fwd_info, const void *ptr)
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int found = 0;
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int index = 0;
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unsigned long flags;
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if (!fwd_info || !ptr)
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return found;
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spin_lock_irqsave(&fwd_info->write_buf_lock, flags);
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for (index = 0; index < NUM_WRITE_BUFFERS; index++) {
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if (fwd_info->buf_ptr[index]->data == ptr) {
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atomic_set(&fwd_info->buf_ptr[index]->in_busy, 0);
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@ -951,6 +963,7 @@ int diagfwd_write_buffer_done(struct diagfwd_info *fwd_info, const void *ptr)
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break;
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}
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}
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spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags);
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return found;
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}
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@ -1197,7 +1210,7 @@ void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info)
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return;
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}
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spin_lock_irqsave(&fwd_info->buf_lock, flags);
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spin_lock_irqsave(&fwd_info->write_buf_lock, flags);
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for (i = 0; i < NUM_WRITE_BUFFERS; i++) {
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if (!fwd_info->buf_ptr[i])
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fwd_info->buf_ptr[i] =
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@ -1215,11 +1228,11 @@ void diagfwd_write_buffers_init(struct diagfwd_info *fwd_info)
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kmemleak_not_leak(fwd_info->buf_ptr[i]->data);
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}
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}
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spin_unlock_irqrestore(&fwd_info->buf_lock, flags);
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spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags);
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return;
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err:
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spin_unlock_irqrestore(&fwd_info->buf_lock, flags);
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spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags);
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pr_err("diag:unable to allocate write buffers\n");
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diagfwd_write_buffers_exit(fwd_info);
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@ -1233,7 +1246,7 @@ static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info)
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if (!fwd_info)
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return;
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spin_lock_irqsave(&fwd_info->buf_lock, flags);
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spin_lock_irqsave(&fwd_info->write_buf_lock, flags);
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for (i = 0; i < NUM_WRITE_BUFFERS; i++) {
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if (fwd_info->buf_ptr[i]) {
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kfree(fwd_info->buf_ptr[i]->data);
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@ -1242,5 +1255,5 @@ static void diagfwd_write_buffers_exit(struct diagfwd_info *fwd_info)
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fwd_info->buf_ptr[i] = NULL;
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}
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}
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spin_unlock_irqrestore(&fwd_info->buf_lock, flags);
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spin_unlock_irqrestore(&fwd_info->write_buf_lock, flags);
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}
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@ -71,6 +71,7 @@ struct diagfwd_info {
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unsigned long read_bytes;
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unsigned long write_bytes;
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spinlock_t buf_lock;
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spinlock_t write_buf_lock;
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struct mutex data_mutex;
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void *ctxt;
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struct diagfwd_buf_t *buf_1;
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