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iwlagn: add rx_free to transport layer

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The transport layer ness to release all rx ressources. This function is an API for it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
This commit is contained in:
Emmanuel Grumbach 2011-06-21 14:25:45 +03:00 committed by Wey-Yi Guy
parent c85eb61969
commit a0f6b0a211
5 changed files with 62 additions and 49 deletions
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27
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View File

@ -910,33 +910,6 @@ void iwlagn_rx_replenish_now(struct iwl_priv *priv)
iwlagn_rx_queue_restock(priv);
}
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
* If an SKB has been detached, the POOL needs to have its SKB set to NULL
* This free routine walks the list of POOL entries and if SKB is set to
* non NULL it is unmapped and freed
*/
void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq)
{
int i;
for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) {
if (rxq->pool[i].page != NULL) {
dma_unmap_page(priv->bus.dev, rxq->pool[i].page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__iwl_free_pages(priv, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
}
dma_free_coherent(priv->bus.dev, 4 * RX_QUEUE_SIZE,
rxq->bd, rxq->bd_dma);
dma_free_coherent(priv->bus.dev,
sizeof(struct iwl_rb_status),
rxq->rb_stts, rxq->rb_stts_dma);
rxq->bd = NULL;
rxq->rb_stts = NULL;
}
int iwlagn_rxq_stop(struct iwl_priv *priv)
{

3
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -3718,8 +3718,7 @@ void __devexit iwl_remove(struct iwl_priv * priv)
iwl_dealloc_ucode(priv);
if (priv->rxq.bd)
iwlagn_rx_queue_free(priv, &priv->rxq);
priv->trans.ops->rx_free(priv);
iwlagn_hw_txq_ctx_free(priv);
iwl_eeprom_free(priv);

1
drivers/net/wireless/iwlwifi/iwl-agn.h
View File

@ -193,7 +193,6 @@ void iwlagn_rx_queue_restock(struct iwl_priv *priv);
void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority);
void iwlagn_rx_replenish(struct iwl_priv *priv);
void iwlagn_rx_replenish_now(struct iwl_priv *priv);
void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq);
int iwlagn_rxq_stop(struct iwl_priv *priv);
int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band);
void iwl_setup_rx_handlers(struct iwl_priv *priv);

2
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -1233,9 +1233,11 @@ struct iwl_trans;
* struct iwl_trans_ops - transport specific operations
* @rx_init: inits the rx memory, allocate it if needed
*@rx_free: frees the rx memory
*/
struct iwl_trans_ops {
int (*rx_init)(struct iwl_priv *priv);
void (*rx_free)(struct iwl_priv *priv);
};
struct iwl_trans {

78
drivers/net/wireless/iwlwifi/iwl-trans.c
View File

@ -60,7 +60,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*****************************************************************************/
#include "iwl-dev.h"
#include "iwl-dev.h"
#include "iwl-trans.h"
static int iwl_trans_rx_alloc(struct iwl_priv *priv)
@ -78,12 +78,11 @@ static int iwl_trans_rx_alloc(struct iwl_priv *priv)
return -EINVAL;
/* Allocate the circular buffer of Read Buffer Descriptors (RBDs) */
/*Every descriptor is an __le32, hence its */
rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
GFP_KERNEL);
rxq->bd = dma_alloc_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
&rxq->bd_dma, GFP_KERNEL);
if (!rxq->bd)
goto err_bd;
memset(rxq->bd, 0, 4 * RX_QUEUE_SIZE);
memset(rxq->bd, 0, sizeof(__le32) * RX_QUEUE_SIZE);
/*Allocate the driver's pointer to receive buffer status */
rxq->rb_stts = dma_alloc_coherent(dev, sizeof(*rxq->rb_stts),
@ -95,13 +94,34 @@ static int iwl_trans_rx_alloc(struct iwl_priv *priv)
return 0;
err_rb_stts:
dma_free_coherent(dev, 4 * RX_QUEUE_SIZE, rxq->bd, rxq->bd_dma);
dma_free_coherent(dev, sizeof(__le32) * RX_QUEUE_SIZE,
rxq->bd, rxq->bd_dma);
memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
rxq->bd = NULL;
err_bd:
return -ENOMEM;
}
static void iwl_trans_rxq_free_rx_bufs(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
int i;
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
/* In the reset function, these buffers may have been allocated
* to an SKB, so we need to unmap and free potential storage */
if (rxq->pool[i].page != NULL) {
dma_unmap_page(priv->bus.dev, rxq->pool[i].page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__iwl_free_pages(priv, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
}
}
static int iwl_trans_rx_init(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
@ -118,19 +138,7 @@ static int iwl_trans_rx_init(struct iwl_priv *priv)
INIT_LIST_HEAD(&rxq->rx_free);
INIT_LIST_HEAD(&rxq->rx_used);
/* Fill the rx_used queue with _all_ of the Rx buffers */
for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) {
/* In the reset function, these buffers may have been allocated
* to an SKB, so we need to unmap and free potential storage */
if (rxq->pool[i].page != NULL) {
dma_unmap_page(priv->bus.dev, rxq->pool[i].page_dma,
PAGE_SIZE << priv->hw_params.rx_page_order,
DMA_FROM_DEVICE);
__iwl_free_pages(priv, rxq->pool[i].page);
rxq->pool[i].page = NULL;
}
list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
}
iwl_trans_rxq_free_rx_bufs(priv);
for (i = 0; i < RX_QUEUE_SIZE; i++)
rxq->queue[i] = NULL;
@ -145,8 +153,40 @@ static int iwl_trans_rx_init(struct iwl_priv *priv)
return 0;
}
static void iwl_trans_rx_free(struct iwl_priv *priv)
{
struct iwl_rx_queue *rxq = &priv->rxq;
unsigned long flags;
/*if rxq->bd is NULL, it means that nothing has been allocated,
* exit now */
if (!rxq->bd) {
IWL_DEBUG_INFO(priv, "Free NULL rx context\n");
return;
}
spin_lock_irqsave(&rxq->lock, flags);
iwl_trans_rxq_free_rx_bufs(priv);
spin_unlock_irqrestore(&rxq->lock, flags);
dma_free_coherent(priv->bus.dev, sizeof(__le32) * RX_QUEUE_SIZE,
rxq->bd, rxq->bd_dma);
memset(&rxq->bd_dma, 0, sizeof(rxq->bd_dma));
rxq->bd = NULL;
if (rxq->rb_stts)
dma_free_coherent(priv->bus.dev,
sizeof(struct iwl_rb_status),
rxq->rb_stts, rxq->rb_stts_dma);
else
IWL_DEBUG_INFO(priv, "Free rxq->rb_stts which is NULL\n");
memset(&rxq->rb_stts_dma, 0, sizeof(rxq->rb_stts_dma));
rxq->rb_stts = NULL;
}
static const struct iwl_trans_ops trans_ops = {
.rx_init = iwl_trans_rx_init,
.rx_free = iwl_trans_rx_free,
};
void iwl_trans_register(struct iwl_trans *trans)