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path: root/drivers/net/wimax/i2400m/sdio-tx.c
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Diffstat (limited to 'drivers/net/wimax/i2400m/sdio-tx.c')
-rw-r--r--drivers/net/wimax/i2400m/sdio-tx.c177
1 files changed, 0 insertions, 177 deletions
diff --git a/drivers/net/wimax/i2400m/sdio-tx.c b/drivers/net/wimax/i2400m/sdio-tx.c
deleted file mode 100644
index b53cd1c80e3e..000000000000
--- a/drivers/net/wimax/i2400m/sdio-tx.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * SDIO TX transaction backends
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- *
- * Intel Corporation <linux-wimax@intel.com>
- * Dirk Brandewie <dirk.j.brandewie@intel.com>
- * - Initial implementation
- *
- *
- * Takes the TX messages in the i2400m's driver TX FIFO and sends them
- * to the device until there are no more.
- *
- * If we fail sending the message, we just drop it. There isn't much
- * we can do at this point. Most of the traffic is network, which has
- * recovery methods for dropped packets.
- *
- * The SDIO functions are not atomic, so we can't run from the context
- * where i2400m->bus_tx_kick() [i2400ms_bus_tx_kick()] is being called
- * (some times atomic). Thus, the actual TX work is deferred to a
- * workqueue.
- *
- * ROADMAP
- *
- * i2400ms_bus_tx_kick()
- * i2400ms_tx_submit() [through workqueue]
- *
- * i2400m_tx_setup()
- *
- * i2400m_tx_release()
- */
-#include <linux/mmc/sdio_func.h>
-#include "i2400m-sdio.h"
-
-#define D_SUBMODULE tx
-#include "sdio-debug-levels.h"
-
-
-/*
- * Pull TX transations from the TX FIFO and send them to the device
- * until there are no more.
- */
-static
-void i2400ms_tx_submit(struct work_struct *ws)
-{
- int result;
- struct i2400ms *i2400ms = container_of(ws, struct i2400ms, tx_worker);
- struct i2400m *i2400m = &i2400ms->i2400m;
- struct sdio_func *func = i2400ms->func;
- struct device *dev = &func->dev;
- struct i2400m_msg_hdr *tx_msg;
- size_t tx_msg_size;
-
- d_fnstart(4, dev, "(i2400ms %p, i2400m %p)\n", i2400ms, i2400ms);
-
- while (NULL != (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size))) {
- d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
- d_dump(5, dev, tx_msg, tx_msg_size);
-
- sdio_claim_host(func);
- result = sdio_memcpy_toio(func, 0, tx_msg, tx_msg_size);
- sdio_release_host(func);
-
- i2400m_tx_msg_sent(i2400m);
-
- if (result < 0) {
- dev_err(dev, "TX: cannot submit TX; tx_msg @%zu %zu B:"
- " %d\n", (void *) tx_msg - i2400m->tx_buf,
- tx_msg_size, result);
- }
-
- if (result == -ETIMEDOUT) {
- i2400m_error_recovery(i2400m);
- break;
- }
- d_printf(2, dev, "TX: %zub submitted\n", tx_msg_size);
- }
-
- d_fnend(4, dev, "(i2400ms %p) = void\n", i2400ms);
-}
-
-
-/*
- * The generic driver notifies us that there is data ready for TX
- *
- * Schedule a run of i2400ms_tx_submit() to handle it.
- */
-void i2400ms_bus_tx_kick(struct i2400m *i2400m)
-{
- struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
- struct device *dev = &i2400ms->func->dev;
- unsigned long flags;
-
- d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
-
- /* schedule tx work, this is because tx may block, therefore
- * it has to run in a thread context.
- */
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- if (i2400ms->tx_workqueue != NULL)
- queue_work(i2400ms->tx_workqueue, &i2400ms->tx_worker);
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
-}
-
-int i2400ms_tx_setup(struct i2400ms *i2400ms)
-{
- int result;
- struct device *dev = &i2400ms->func->dev;
- struct i2400m *i2400m = &i2400ms->i2400m;
- struct workqueue_struct *tx_workqueue;
- unsigned long flags;
-
- d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
-
- INIT_WORK(&i2400ms->tx_worker, i2400ms_tx_submit);
- snprintf(i2400ms->tx_wq_name, sizeof(i2400ms->tx_wq_name),
- "%s-tx", i2400m->wimax_dev.name);
- tx_workqueue =
- create_singlethread_workqueue(i2400ms->tx_wq_name);
- if (tx_workqueue == NULL) {
- dev_err(dev, "TX: failed to create workqueue\n");
- result = -ENOMEM;
- } else
- result = 0;
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- i2400ms->tx_workqueue = tx_workqueue;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
- d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
- return result;
-}
-
-void i2400ms_tx_release(struct i2400ms *i2400ms)
-{
- struct i2400m *i2400m = &i2400ms->i2400m;
- struct workqueue_struct *tx_workqueue;
- unsigned long flags;
-
- tx_workqueue = i2400ms->tx_workqueue;
-
- spin_lock_irqsave(&i2400m->tx_lock, flags);
- i2400ms->tx_workqueue = NULL;
- spin_unlock_irqrestore(&i2400m->tx_lock, flags);
-
- if (tx_workqueue)
- destroy_workqueue(tx_workqueue);
-}