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| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/dev/nxge/xgehal/xgehal-channel.c |
/*-
* Copyright (c) 2002-2007 Neterion, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD: release/9.1.0/sys/dev/nxge/xgehal/xgehal-channel.c 173139 2007-10-29 14:19:32Z rwatson $
*/
#include <dev/nxge/include/xgehal-channel.h>
#include <dev/nxge/include/xgehal-fifo.h>
#include <dev/nxge/include/xgehal-ring.h>
#include <dev/nxge/include/xgehal-device.h>
#include <dev/nxge/include/xgehal-regs.h>
/*
* __hal_channel_dtr_next_reservelist
*
* Walking through the all available DTRs.
*/
static xge_hal_status_e
__hal_channel_dtr_next_reservelist(xge_hal_channel_h channelh,
xge_hal_dtr_h *dtrh)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
if (channel->reserve_top >= channel->reserve_length) {
return XGE_HAL_INF_NO_MORE_FREED_DESCRIPTORS;
}
*dtrh = channel->reserve_arr[channel->reserve_top++];
return XGE_HAL_OK;
}
/*
* __hal_channel_dtr_next_freelist
*
* Walking through the "freed" DTRs.
*/
static xge_hal_status_e
__hal_channel_dtr_next_freelist(xge_hal_channel_h channelh, xge_hal_dtr_h *dtrh)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
if (channel->reserve_initial == channel->free_length) {
return XGE_HAL_INF_NO_MORE_FREED_DESCRIPTORS;
}
*dtrh = channel->free_arr[channel->free_length++];
return XGE_HAL_OK;
}
/*
* __hal_channel_dtr_next_not_completed - Get the _next_ posted but
* not completed descriptor.
*
* Walking through the "not completed" DTRs.
*/
static xge_hal_status_e
__hal_channel_dtr_next_not_completed(xge_hal_channel_h channelh,
xge_hal_dtr_h *dtrh)
{
xge_hal_ring_rxd_1_t *rxdp; /* doesn't matter 1, 3 or 5... */
__hal_channel_dtr_try_complete(channelh, dtrh);
if (*dtrh == NULL) {
return XGE_HAL_INF_NO_MORE_COMPLETED_DESCRIPTORS;
}
rxdp = (xge_hal_ring_rxd_1_t *)*dtrh;
xge_assert(rxdp->host_control!=0);
__hal_channel_dtr_complete(channelh);
return XGE_HAL_OK;
}
xge_hal_channel_t*
__hal_channel_allocate(xge_hal_device_h devh, int post_qid,
xge_hal_channel_type_e type)
{
xge_hal_device_t *hldev = (xge_hal_device_t*)devh;
xge_hal_channel_t *channel;
int size = 0;
switch(type) {
case XGE_HAL_CHANNEL_TYPE_FIFO:
xge_assert(post_qid + 1 >= XGE_HAL_MIN_FIFO_NUM &&
post_qid + 1 <= XGE_HAL_MAX_FIFO_NUM);
size = sizeof(xge_hal_fifo_t);
break;
case XGE_HAL_CHANNEL_TYPE_RING:
xge_assert(post_qid + 1 >= XGE_HAL_MIN_RING_NUM &&
post_qid + 1 <= XGE_HAL_MAX_RING_NUM);
size = sizeof(xge_hal_ring_t);
break;
default :
xge_assert(size);
break;
}
/* allocate FIFO channel */
channel = (xge_hal_channel_t *) xge_os_malloc(hldev->pdev, size);
if (channel == NULL) {
return NULL;
}
xge_os_memzero(channel, size);
channel->pdev = hldev->pdev;
channel->regh0 = hldev->regh0;
channel->regh1 = hldev->regh1;
channel->type = type;
channel->devh = devh;
channel->post_qid = post_qid;
channel->compl_qid = 0;
return channel;
}
void __hal_channel_free(xge_hal_channel_t *channel)
{
int size = 0;
xge_assert(channel->pdev);
switch(channel->type) {
case XGE_HAL_CHANNEL_TYPE_FIFO:
size = sizeof(xge_hal_fifo_t);
break;
case XGE_HAL_CHANNEL_TYPE_RING:
size = sizeof(xge_hal_ring_t);
break;
case XGE_HAL_CHANNEL_TYPE_SEND_QUEUE:
case XGE_HAL_CHANNEL_TYPE_RECEIVE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_COMPLETION_QUEUE:
case XGE_HAL_CHANNEL_TYPE_UP_MESSAGE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_DOWN_MESSAGE_QUEUE:
xge_assert(size);
break;
default:
break;
}
xge_os_free(channel->pdev, channel, size);
}
xge_hal_status_e
__hal_channel_initialize (xge_hal_channel_h channelh,
xge_hal_channel_attr_t *attr, void **reserve_arr,
int reserve_initial, int reserve_max, int reserve_threshold)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
xge_hal_device_t *hldev;
hldev = (xge_hal_device_t *)channel->devh;
channel->dtr_term = attr->dtr_term;
channel->dtr_init = attr->dtr_init;
channel->callback = attr->callback;
channel->userdata = attr->userdata;
channel->flags = attr->flags;
channel->per_dtr_space = attr->per_dtr_space;
channel->reserve_arr = reserve_arr;
channel->reserve_initial = reserve_initial;
channel->reserve_max = reserve_max;
channel->reserve_length = channel->reserve_initial;
channel->reserve_threshold = reserve_threshold;
channel->reserve_top = 0;
channel->saved_arr = (void **) xge_os_malloc(hldev->pdev,
sizeof(void*)*channel->reserve_max);
if (channel->saved_arr == NULL) {
return XGE_HAL_ERR_OUT_OF_MEMORY;
}
xge_os_memzero(channel->saved_arr, sizeof(void*)*channel->reserve_max);
channel->free_arr = channel->saved_arr;
channel->free_length = channel->reserve_initial;
channel->work_arr = (void **) xge_os_malloc(hldev->pdev,
sizeof(void*)*channel->reserve_max);
if (channel->work_arr == NULL) {
return XGE_HAL_ERR_OUT_OF_MEMORY;
}
xge_os_memzero(channel->work_arr,
sizeof(void*)*channel->reserve_max);
channel->post_index = 0;
channel->compl_index = 0;
channel->length = channel->reserve_initial;
channel->orig_arr = (void **) xge_os_malloc(hldev->pdev,
sizeof(void*)*channel->reserve_max);
if (channel->orig_arr == NULL)
return XGE_HAL_ERR_OUT_OF_MEMORY;
xge_os_memzero(channel->orig_arr, sizeof(void*)*channel->reserve_max);
#if defined(XGE_HAL_RX_MULTI_FREE_IRQ) || defined(XGE_HAL_TX_MULTI_FREE_IRQ)
xge_os_spin_lock_init_irq(&channel->free_lock, hldev->irqh);
#elif defined(XGE_HAL_RX_MULTI_FREE) || defined(XGE_HAL_TX_MULTI_FREE)
xge_os_spin_lock_init(&channel->free_lock, hldev->pdev);
#endif
return XGE_HAL_OK;
}
void __hal_channel_terminate(xge_hal_channel_h channelh)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
xge_hal_device_t *hldev;
hldev = (xge_hal_device_t *)channel->devh;
xge_assert(channel->pdev);
/* undo changes made at channel_initialize() */
if (channel->work_arr) {
xge_os_free(channel->pdev, channel->work_arr,
sizeof(void*)*channel->reserve_max);
channel->work_arr = NULL;
}
if (channel->saved_arr) {
xge_os_free(channel->pdev, channel->saved_arr,
sizeof(void*)*channel->reserve_max);
channel->saved_arr = NULL;
}
if (channel->orig_arr) {
xge_os_free(channel->pdev, channel->orig_arr,
sizeof(void*)*channel->reserve_max);
channel->orig_arr = NULL;
}
#if defined(XGE_HAL_RX_MULTI_FREE_IRQ) || defined(XGE_HAL_TX_MULTI_FREE_IRQ)
xge_os_spin_lock_destroy_irq(&channel->free_lock, hldev->irqh);
#elif defined(XGE_HAL_RX_MULTI_FREE) || defined(XGE_HAL_TX_MULTI_FREE)
xge_os_spin_lock_destroy(&channel->free_lock, hldev->pdev);
#endif
}
/**
* xge_hal_channel_open - Open communication channel.
* @devh: HAL device, pointer to xge_hal_device_t structure.
* @attr: Contains attributes required to open
* the channel.
* @channelh: The channel handle. On success (XGE_HAL_OK) HAL fills
* this "out" parameter with a valid channel handle.
* @reopen: See xge_hal_channel_reopen_e{}.
*
* Open communication channel with the device.
*
* HAL uses (persistent) channel configuration to allocate both channel
* and Xframe Tx and Rx descriptors.
* Notes:
* 1) The channel config data is fed into HAL prior to
* xge_hal_channel_open().
*
* 2) The corresponding hardware queues must be already configured and
* enabled.
*
* 3) Either down or up queue may be omitted, in which case the channel
* is treated as _unidirectional_.
*
* 4) Post and completion queue may be the same, in which case the channel
* is said to have "in-band completions".
*
* Note that free_channels list is not protected. i.e. caller must provide
* safe context.
*
* Returns: XGE_HAL_OK - success.
* XGE_HAL_ERR_CHANNEL_NOT_FOUND - Unable to locate the channel.
* XGE_HAL_ERR_OUT_OF_MEMORY - Memory allocation failed.
*
* See also: xge_hal_channel_attr_t{}.
* Usage: See ex_open{}.
*/
xge_hal_status_e
xge_hal_channel_open(xge_hal_device_h devh,
xge_hal_channel_attr_t *attr,
xge_hal_channel_h *channelh,
xge_hal_channel_reopen_e reopen)
{
xge_list_t *item;
int i;
xge_hal_status_e status = XGE_HAL_OK;
xge_hal_channel_t *channel = NULL;
xge_hal_device_t *device = (xge_hal_device_t *)devh;
xge_assert(device);
xge_assert(attr);
*channelh = NULL;
/* find channel */
xge_list_for_each(item, &device->free_channels) {
xge_hal_channel_t *tmp;
tmp = xge_container_of(item, xge_hal_channel_t, item);
if (tmp->type == attr->type &&
tmp->post_qid == attr->post_qid &&
tmp->compl_qid == attr->compl_qid) {
channel = tmp;
break;
}
}
if (channel == NULL) {
return XGE_HAL_ERR_CHANNEL_NOT_FOUND;
}
xge_assert((channel->type == XGE_HAL_CHANNEL_TYPE_FIFO) ||
(channel->type == XGE_HAL_CHANNEL_TYPE_RING));
if (reopen == XGE_HAL_CHANNEL_OC_NORMAL) {
/* allocate memory, initialize pointers, etc */
switch(channel->type) {
case XGE_HAL_CHANNEL_TYPE_FIFO:
status = __hal_fifo_open(channel, attr);
break;
case XGE_HAL_CHANNEL_TYPE_RING:
status = __hal_ring_open(channel, attr);
break;
case XGE_HAL_CHANNEL_TYPE_SEND_QUEUE:
case XGE_HAL_CHANNEL_TYPE_RECEIVE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_COMPLETION_QUEUE:
case XGE_HAL_CHANNEL_TYPE_UP_MESSAGE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_DOWN_MESSAGE_QUEUE:
status = XGE_HAL_FAIL;
break;
default:
break;
}
if (status == XGE_HAL_OK) {
for (i = 0; i < channel->reserve_initial; i++) {
channel->orig_arr[i] =
channel->reserve_arr[i];
}
}
else
return status;
} else {
xge_assert(reopen == XGE_HAL_CHANNEL_RESET_ONLY);
for (i = 0; i < channel->reserve_initial; i++) {
channel->reserve_arr[i] = channel->orig_arr[i];
channel->free_arr[i] = NULL;
}
channel->free_length = channel->reserve_initial;
channel->reserve_length = channel->reserve_initial;
channel->reserve_top = 0;
channel->post_index = 0;
channel->compl_index = 0;
if (channel->type == XGE_HAL_CHANNEL_TYPE_RING) {
status = __hal_ring_initial_replenish(channel,
reopen);
if (status != XGE_HAL_OK)
return status;
}
}
/* move channel to the open state list */
switch(channel->type) {
case XGE_HAL_CHANNEL_TYPE_FIFO:
xge_list_remove(&channel->item);
xge_list_insert(&channel->item, &device->fifo_channels);
break;
case XGE_HAL_CHANNEL_TYPE_RING:
xge_list_remove(&channel->item);
xge_list_insert(&channel->item, &device->ring_channels);
break;
case XGE_HAL_CHANNEL_TYPE_SEND_QUEUE:
case XGE_HAL_CHANNEL_TYPE_RECEIVE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_COMPLETION_QUEUE:
case XGE_HAL_CHANNEL_TYPE_UP_MESSAGE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_DOWN_MESSAGE_QUEUE:
xge_assert(channel->type == XGE_HAL_CHANNEL_TYPE_FIFO ||
channel->type == XGE_HAL_CHANNEL_TYPE_RING);
break;
default:
break;
}
channel->is_open = 1;
channel->terminating = 0;
/*
* The magic check the argument validity, has to be
* removed before 03/01/2005.
*/
channel->magic = XGE_HAL_MAGIC;
*channelh = channel;
return XGE_HAL_OK;
}
/**
* xge_hal_channel_abort - Abort the channel.
* @channelh: Channel handle.
* @reopen: See xge_hal_channel_reopen_e{}.
*
* Terminate (via xge_hal_channel_dtr_term_f{}) all channel descriptors.
* Currently used internally only by HAL, as part of its
* xge_hal_channel_close() and xge_hal_channel_open() in case
* of fatal error.
*
* See also: xge_hal_channel_dtr_term_f{}.
*/
void xge_hal_channel_abort(xge_hal_channel_h channelh,
xge_hal_channel_reopen_e reopen)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
xge_hal_dtr_h dtr;
#ifdef XGE_OS_MEMORY_CHECK
int check_cnt = 0;
#endif
int free_length_sav;
int reserve_top_sav;
if (channel->dtr_term == NULL) {
return;
}
free_length_sav = channel->free_length;
while (__hal_channel_dtr_next_freelist(channelh, &dtr) == XGE_HAL_OK) {
#ifdef XGE_OS_MEMORY_CHECK
#ifdef XGE_DEBUG_ASSERT
if (channel->type == XGE_HAL_CHANNEL_TYPE_FIFO) {
xge_assert(!__hal_fifo_txdl_priv(dtr)->allocated);
} else {
if (channel->type == XGE_HAL_CHANNEL_TYPE_RING) {
xge_assert(!__hal_ring_rxd_priv((xge_hal_ring_t * ) channelh, dtr)->allocated);
}
}
#endif
check_cnt++;
#endif
channel->dtr_term(channel, dtr, XGE_HAL_DTR_STATE_FREED,
channel->userdata, reopen);
}
channel->free_length = free_length_sav;
while (__hal_channel_dtr_next_not_completed(channelh, &dtr) ==
XGE_HAL_OK) {
#ifdef XGE_OS_MEMORY_CHECK
#ifdef XGE_DEBUG_ASSERT
if (channel->type == XGE_HAL_CHANNEL_TYPE_FIFO) {
xge_assert(__hal_fifo_txdl_priv(dtr)->allocated);
} else {
if (channel->type == XGE_HAL_CHANNEL_TYPE_RING) {
xge_assert(__hal_ring_rxd_priv((xge_hal_ring_t * ) channelh, dtr)
->allocated);
}
}
#endif
check_cnt++;
#endif
channel->dtr_term(channel, dtr, XGE_HAL_DTR_STATE_POSTED,
channel->userdata, reopen);
}
reserve_top_sav = channel->reserve_top;
while (__hal_channel_dtr_next_reservelist(channelh, &dtr) ==
XGE_HAL_OK) {
#ifdef XGE_OS_MEMORY_CHECK
#ifdef XGE_DEBUG_ASSERT
if (channel->type == XGE_HAL_CHANNEL_TYPE_FIFO) {
xge_assert(!__hal_fifo_txdl_priv(dtr)->allocated);
} else {
if (channel->type == XGE_HAL_CHANNEL_TYPE_RING) {
xge_assert(!__hal_ring_rxd_priv((xge_hal_ring_t * ) channelh, dtr)->allocated);
}
}
#endif
check_cnt++;
#endif
channel->dtr_term(channel, dtr, XGE_HAL_DTR_STATE_AVAIL,
channel->userdata, reopen);
}
channel->reserve_top = reserve_top_sav;
xge_assert(channel->reserve_length ==
(channel->free_length + channel->reserve_top));
#ifdef XGE_OS_MEMORY_CHECK
xge_assert(check_cnt == channel->reserve_initial);
#endif
}
/**
* xge_hal_channel_close - Close communication channel.
* @channelh: The channel handle.
* @reopen: See xge_hal_channel_reopen_e{}.
*
* Will close previously opened channel and deallocate associated resources.
* Channel must be opened otherwise assert will be generated.
* Note that free_channels list is not protected. i.e. caller must provide
* safe context.
*/
void xge_hal_channel_close(xge_hal_channel_h channelh,
xge_hal_channel_reopen_e reopen)
{
xge_hal_channel_t *channel = (xge_hal_channel_t *)channelh;
xge_hal_device_t *hldev;
xge_list_t *item;
xge_assert(channel);
xge_assert(channel->type < XGE_HAL_CHANNEL_TYPE_MAX);
hldev = (xge_hal_device_t *)channel->devh;
channel->is_open = 0;
channel->magic = XGE_HAL_DEAD;
/* sanity check: make sure channel is not in free list */
xge_list_for_each(item, &hldev->free_channels) {
xge_hal_channel_t *tmp;
tmp = xge_container_of(item, xge_hal_channel_t, item);
xge_assert(!tmp->is_open);
if (channel == tmp) {
return;
}
}
xge_hal_channel_abort(channel, reopen);
xge_assert((channel->type == XGE_HAL_CHANNEL_TYPE_FIFO) ||
(channel->type == XGE_HAL_CHANNEL_TYPE_RING));
if (reopen == XGE_HAL_CHANNEL_OC_NORMAL) {
/* de-allocate */
switch(channel->type) {
case XGE_HAL_CHANNEL_TYPE_FIFO:
__hal_fifo_close(channelh);
break;
case XGE_HAL_CHANNEL_TYPE_RING:
__hal_ring_close(channelh);
break;
case XGE_HAL_CHANNEL_TYPE_SEND_QUEUE:
case XGE_HAL_CHANNEL_TYPE_RECEIVE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_COMPLETION_QUEUE:
case XGE_HAL_CHANNEL_TYPE_UP_MESSAGE_QUEUE:
case XGE_HAL_CHANNEL_TYPE_DOWN_MESSAGE_QUEUE:
xge_assert(channel->type == XGE_HAL_CHANNEL_TYPE_FIFO ||
channel->type == XGE_HAL_CHANNEL_TYPE_RING);
break;
default:
break;
}
}
else
xge_assert(reopen == XGE_HAL_CHANNEL_RESET_ONLY);
/* move channel back to free state list */
xge_list_remove(&channel->item);
xge_list_insert(&channel->item, &hldev->free_channels);
if (xge_list_is_empty(&hldev->fifo_channels) &&
xge_list_is_empty(&hldev->ring_channels)) {
/* clear msix_idx in case of following HW reset */
hldev->reset_needed_after_close = 1;
}
}