diff options
Diffstat (limited to 'drivers/net/wimax/i2400m/sdio-tx.c')
| -rw-r--r-- | drivers/net/wimax/i2400m/sdio-tx.c | 177 |
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); -} |