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iwlagn: move the tx allocation funcs to the transport layer

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These functions allocate all the Tx context. Only the simple tx_init is exported as API.

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 2011-06-28 08:58:41 -07:00 committed by Wey-Yi Guy
parent a0f6b0a211
commit 02aca585f5
8 changed files with 236 additions and 257 deletions
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9
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View File

@ -699,7 +699,6 @@ int iwlagn_hw_nic_init(struct iwl_priv *priv)
{
unsigned long flags;
struct iwl_rx_queue *rxq = &priv->rxq;
int ret;
/* nic_init */
spin_lock_irqsave(&priv->lock, flags);
@ -729,12 +728,8 @@ int iwlagn_hw_nic_init(struct iwl_priv *priv)
spin_unlock_irqrestore(&priv->lock, flags);
/* Allocate or reset and init all Tx and Command queues */
if (!priv->txq) {
ret = iwlagn_txq_ctx_alloc(priv);
if (ret)
return ret;
} else
iwlagn_txq_ctx_reset(priv);
if (priv->trans.ops->tx_init(priv))
return -ENOMEM;
if (priv->cfg->base_params->shadow_reg_enable) {
/* enable shadow regs in HW */

90
drivers/net/wireless/iwlwifi/iwl-agn-tx.c
View File

@ -877,96 +877,6 @@ void iwlagn_hw_txq_ctx_free(struct iwl_priv *priv)
iwl_free_txq_mem(priv);
}
/**
* iwlagn_txq_ctx_alloc - allocate TX queue context
* Allocate all Tx DMA structures and initialize them
*
* @param priv
* @return error code
*/
int iwlagn_txq_ctx_alloc(struct iwl_priv *priv)
{
int ret;
int txq_id, slots_num;
unsigned long flags;
/* Free all tx/cmd queues and keep-warm buffer */
iwlagn_hw_txq_ctx_free(priv);
ret = iwlagn_alloc_dma_ptr(priv, &priv->scd_bc_tbls,
priv->hw_params.scd_bc_tbls_size);
if (ret) {
IWL_ERR(priv, "Scheduler BC Table allocation failed\n");
goto error_bc_tbls;
}
/* Alloc keep-warm buffer */
ret = iwlagn_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE);
if (ret) {
IWL_ERR(priv, "Keep Warm allocation failed\n");
goto error_kw;
}
/* allocate tx queue structure */
ret = iwl_alloc_txq_mem(priv);
if (ret)
goto error;
spin_lock_irqsave(&priv->lock, flags);
/* Turn off all Tx DMA fifos */
iwlagn_txq_set_sched(priv, 0);
/* Tell NIC where to find the "keep warm" buffer */
iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
spin_unlock_irqrestore(&priv->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
slots_num = (txq_id == priv->cmd_queue) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
ret = iwl_tx_queue_init(priv, &priv->txq[txq_id], slots_num,
txq_id);
if (ret) {
IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
goto error;
}
}
return ret;
error:
iwlagn_hw_txq_ctx_free(priv);
iwlagn_free_dma_ptr(priv, &priv->kw);
error_kw:
iwlagn_free_dma_ptr(priv, &priv->scd_bc_tbls);
error_bc_tbls:
return ret;
}
void iwlagn_txq_ctx_reset(struct iwl_priv *priv)
{
int txq_id, slots_num;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
/* Turn off all Tx DMA fifos */
iwlagn_txq_set_sched(priv, 0);
/* Tell NIC where to find the "keep warm" buffer */
iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
spin_unlock_irqrestore(&priv->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4) */
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
slots_num = txq_id == priv->cmd_queue ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
iwl_tx_queue_reset(priv, &priv->txq[txq_id], slots_num, txq_id);
}
}
/**
* iwlagn_txq_ctx_stop - Stop all Tx DMA channels
*/

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

@ -218,8 +218,6 @@ void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
struct iwl_rx_mem_buffer *rxb);
int iwlagn_tx_queue_reclaim(struct iwl_priv *priv, int txq_id, int index);
void iwlagn_hw_txq_ctx_free(struct iwl_priv *priv);
int iwlagn_txq_ctx_alloc(struct iwl_priv *priv);
void iwlagn_txq_ctx_reset(struct iwl_priv *priv);
void iwlagn_txq_ctx_stop(struct iwl_priv *priv);
static inline u32 iwl_tx_status_to_mac80211(u32 status)

14
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -1372,20 +1372,6 @@ void iwl_mac_remove_interface(struct ieee80211_hw *hw,
}
int iwl_alloc_txq_mem(struct iwl_priv *priv)
{
if (!priv->txq)
priv->txq = kzalloc(
sizeof(struct iwl_tx_queue) *
priv->cfg->base_params->num_of_queues,
GFP_KERNEL);
if (!priv->txq) {
IWL_ERR(priv, "Not enough memory for txq\n");
return -ENOMEM;
}
return 0;
}
void iwl_free_txq_mem(struct iwl_priv *priv)
{
kfree(priv->txq);

7
drivers/net/wireless/iwlwifi/iwl-core.h
View File

@ -337,7 +337,6 @@ void iwl_mac_remove_interface(struct ieee80211_hw *hw,
int iwl_mac_change_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum nl80211_iftype newtype, bool newp2p);
int iwl_alloc_txq_mem(struct iwl_priv *priv);
void iwl_free_txq_mem(struct iwl_priv *priv);
#ifdef CONFIG_IWLWIFI_DEBUGFS
@ -396,11 +395,9 @@ void iwl_chswitch_done(struct iwl_priv *priv, bool is_success);
* TX
******************************************************/
void iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq);
int iwl_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id);
void iwl_tx_queue_reset(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id);
void iwl_tx_queue_free(struct iwl_priv *priv, int txq_id);
int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
int count, int slots_num, u32 id);
void iwl_tx_queue_unmap(struct iwl_priv *priv, int txq_id);
void iwl_setup_watchdog(struct iwl_priv *priv);
/*****************************************************

4
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -1233,11 +1233,13 @@ 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
* @rx_free: frees the rx memory
* @tx_init:inits the tx memory, allocate if needed
*/
struct iwl_trans_ops {
int (*rx_init)(struct iwl_priv *priv);
void (*rx_free)(struct iwl_priv *priv);
int (*tx_init)(struct iwl_priv *priv);
};
struct iwl_trans {

228
drivers/net/wireless/iwlwifi/iwl-trans.c
View File

@ -62,6 +62,10 @@
*****************************************************************************/
#include "iwl-dev.h"
#include "iwl-trans.h"
#include "iwl-core.h"
#include "iwl-helpers.h"
/*TODO remove uneeded includes when the transport layer tx_free will be here */
#include "iwl-agn.h"
static int iwl_trans_rx_alloc(struct iwl_priv *priv)
{
@ -184,9 +188,233 @@ static void iwl_trans_rx_free(struct iwl_priv *priv)
rxq->rb_stts = NULL;
}
/* TODO:remove this code duplication */
static inline int iwlagn_alloc_dma_ptr(struct iwl_priv *priv,
struct iwl_dma_ptr *ptr, size_t size)
{
if (WARN_ON(ptr->addr))
return -EINVAL;
ptr->addr = dma_alloc_coherent(priv->bus.dev, size,
&ptr->dma, GFP_KERNEL);
if (!ptr->addr)
return -ENOMEM;
ptr->size = size;
return 0;
}
static int iwl_trans_txq_alloc(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id)
{
size_t tfd_sz = priv->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
int i;
if (WARN_ON(txq->meta || txq->cmd || txq->txb || txq->tfds))
return -EINVAL;
txq->meta = kzalloc(sizeof(txq->meta[0]) * slots_num,
GFP_KERNEL);
txq->cmd = kzalloc(sizeof(txq->cmd[0]) * slots_num,
GFP_KERNEL);
if (!txq->meta || !txq->cmd)
goto error;
for (i = 0; i < slots_num; i++) {
txq->cmd[i] = kmalloc(sizeof(struct iwl_device_cmd),
GFP_KERNEL);
if (!txq->cmd[i])
goto error;
}
/* Alloc driver data array and TFD circular buffer */
/* Driver private data, only for Tx (not command) queues,
* not shared with device. */
if (txq_id != priv->cmd_queue) {
txq->txb = kzalloc(sizeof(txq->txb[0]) *
TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
if (!txq->txb) {
IWL_ERR(priv, "kmalloc for auxiliary BD "
"structures failed\n");
goto error;
}
} else {
txq->txb = NULL;
}
/* Circular buffer of transmit frame descriptors (TFDs),
* shared with device */
txq->tfds = dma_alloc_coherent(priv->bus.dev, tfd_sz, &txq->q.dma_addr,
GFP_KERNEL);
if (!txq->tfds) {
IWL_ERR(priv, "dma_alloc_coherent(%zd) failed\n", tfd_sz);
goto error;
}
txq->q.id = txq_id;
return 0;
error:
kfree(txq->txb);
txq->txb = NULL;
/* since txq->cmd has been zeroed,
* all non allocated cmd[i] will be NULL */
if (txq->cmd)
for (i = 0; i < slots_num; i++)
kfree(txq->cmd[i]);
kfree(txq->meta);
kfree(txq->cmd);
txq->meta = NULL;
txq->cmd = NULL;
return -ENOMEM;
}
static int iwl_trans_txq_init(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id)
{
int ret;
txq->need_update = 0;
memset(txq->meta, 0, sizeof(txq->meta[0]) * slots_num);
/*
* For the default queues 0-3, set up the swq_id
* already -- all others need to get one later
* (if they need one at all).
*/
if (txq_id < 4)
iwl_set_swq_id(txq, txq_id, txq_id);
/* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
* iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
/* Initialize queue's high/low-water marks, and head/tail indexes */
ret = iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num,
txq_id);
if (ret)
return ret;
/*
* Tell nic where to find circular buffer of Tx Frame Descriptors for
* given Tx queue, and enable the DMA channel used for that queue.
* Circular buffer (TFD queue in DRAM) physical base address */
iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
txq->q.dma_addr >> 8);
return 0;
}
/**
* iwl_trans_tx_alloc - allocate TX context
* Allocate all Tx DMA structures and initialize them
*
* @param priv
* @return error code
*/
static int iwl_trans_tx_alloc(struct iwl_priv *priv)
{
int ret;
int txq_id, slots_num;
/*It is not allowed to alloc twice, so warn when this happens.
* We cannot rely on the previous allocation, so free and fail */
if (WARN_ON(priv->txq)) {
ret = -EINVAL;
goto error;
}
ret = iwlagn_alloc_dma_ptr(priv, &priv->scd_bc_tbls,
priv->hw_params.scd_bc_tbls_size);
if (ret) {
IWL_ERR(priv, "Scheduler BC Table allocation failed\n");
goto error;
}
/* Alloc keep-warm buffer */
ret = iwlagn_alloc_dma_ptr(priv, &priv->kw, IWL_KW_SIZE);
if (ret) {
IWL_ERR(priv, "Keep Warm allocation failed\n");
goto error;
}
priv->txq = kzalloc(sizeof(struct iwl_tx_queue) *
priv->cfg->base_params->num_of_queues, GFP_KERNEL);
if (!priv->txq) {
IWL_ERR(priv, "Not enough memory for txq\n");
ret = ENOMEM;
goto error;
}
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
slots_num = (txq_id == priv->cmd_queue) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
ret = iwl_trans_txq_alloc(priv, &priv->txq[txq_id], slots_num,
txq_id);
if (ret) {
IWL_ERR(priv, "Tx %d queue alloc failed\n", txq_id);
goto error;
}
}
return 0;
error:
iwlagn_hw_txq_ctx_free(priv);
return ret;
}
static int iwl_trans_tx_init(struct iwl_priv *priv)
{
int ret;
int txq_id, slots_num;
unsigned long flags;
bool alloc = false;
if (!priv->txq) {
ret = iwl_trans_tx_alloc(priv);
if (ret)
goto error;
alloc = true;
}
spin_lock_irqsave(&priv->lock, flags);
/* Turn off all Tx DMA fifos */
iwl_write_prph(priv, IWLAGN_SCD_TXFACT, 0);
/* Tell NIC where to find the "keep warm" buffer */
iwl_write_direct32(priv, FH_KW_MEM_ADDR_REG, priv->kw.dma >> 4);
spin_unlock_irqrestore(&priv->lock, flags);
/* Alloc and init all Tx queues, including the command queue (#4/#9) */
for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) {
slots_num = (txq_id == priv->cmd_queue) ?
TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
ret = iwl_trans_txq_init(priv, &priv->txq[txq_id], slots_num,
txq_id);
if (ret) {
IWL_ERR(priv, "Tx %d queue init failed\n", txq_id);
goto error;
}
}
return 0;
error:
/*Upon error, free only if we allocated something */
if (alloc)
iwlagn_hw_txq_ctx_free(priv);
return ret;
}
static const struct iwl_trans_ops trans_ops = {
.rx_init = iwl_trans_rx_init,
.rx_free = iwl_trans_rx_free,
.tx_init = iwl_trans_tx_init,
};
void iwl_trans_register(struct iwl_trans *trans)

139
drivers/net/wireless/iwlwifi/iwl-tx.c
View File

@ -220,24 +220,6 @@ int iwlagn_txq_attach_buf_to_tfd(struct iwl_priv *priv,
return 0;
}
/*
* Tell nic where to find circular buffer of Tx Frame Descriptors for
* given Tx queue, and enable the DMA channel used for that queue.
*
* supports up to 16 Tx queues in DRAM, mapped to up to 8 Tx DMA
* channels supported in hardware.
*/
static int iwlagn_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq)
{
int txq_id = txq->q.id;
/* Circular buffer (TFD queue in DRAM) physical base address */
iwl_write_direct32(priv, FH_MEM_CBBC_QUEUE(txq_id),
txq->q.dma_addr >> 8);
return 0;
}
/**
* iwl_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
*/
@ -392,11 +374,10 @@ int iwl_queue_space(const struct iwl_queue *q)
return s;
}
/**
* iwl_queue_init - Initialize queue's high/low-water and read/write indexes
*/
static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
int count, int slots_num, u32 id)
{
q->n_bd = count;
@ -426,124 +407,6 @@ static int iwl_queue_init(struct iwl_priv *priv, struct iwl_queue *q,
return 0;
}
/**
* iwl_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
*/
static int iwl_tx_queue_alloc(struct iwl_priv *priv,
struct iwl_tx_queue *txq, u32 id)
{
struct device *dev = priv->bus.dev;
size_t tfd_sz = priv->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
/* Driver private data, only for Tx (not command) queues,
* not shared with device. */
if (id != priv->cmd_queue) {
txq->txb = kzalloc(sizeof(txq->txb[0]) *
TFD_QUEUE_SIZE_MAX, GFP_KERNEL);
if (!txq->txb) {
IWL_ERR(priv, "kmalloc for auxiliary BD "
"structures failed\n");
goto error;
}
} else {
txq->txb = NULL;
}
/* Circular buffer of transmit frame descriptors (TFDs),
* shared with device */
txq->tfds = dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr,
GFP_KERNEL);
if (!txq->tfds) {
IWL_ERR(priv, "dma_alloc_coherent(%zd) failed\n", tfd_sz);
goto error;
}
txq->q.id = id;
return 0;
error:
kfree(txq->txb);
txq->txb = NULL;
return -ENOMEM;
}
/**
* iwl_tx_queue_init - Allocate and initialize one tx/cmd queue
*/
int iwl_tx_queue_init(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id)
{
int i, len;
int ret;
txq->meta = kzalloc(sizeof(struct iwl_cmd_meta) * slots_num,
GFP_KERNEL);
txq->cmd = kzalloc(sizeof(struct iwl_device_cmd *) * slots_num,
GFP_KERNEL);
if (!txq->meta || !txq->cmd)
goto out_free_arrays;
len = sizeof(struct iwl_device_cmd);
for (i = 0; i < slots_num; i++) {
txq->cmd[i] = kmalloc(len, GFP_KERNEL);
if (!txq->cmd[i])
goto err;
}
/* Alloc driver data array and TFD circular buffer */
ret = iwl_tx_queue_alloc(priv, txq, txq_id);
if (ret)
goto err;
txq->need_update = 0;
/*
* For the default queues 0-3, set up the swq_id
* already -- all others need to get one later
* (if they need one at all).
*/
if (txq_id < 4)
iwl_set_swq_id(txq, txq_id, txq_id);
/* TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
* iwl_queue_inc_wrap and iwl_queue_dec_wrap are broken. */
BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
/* Initialize queue's high/low-water marks, and head/tail indexes */
ret = iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
if (ret)
return ret;
/* Tell device where to find queue */
iwlagn_tx_queue_init(priv, txq);
return 0;
err:
for (i = 0; i < slots_num; i++)
kfree(txq->cmd[i]);
out_free_arrays:
kfree(txq->meta);
kfree(txq->cmd);
return -ENOMEM;
}
void iwl_tx_queue_reset(struct iwl_priv *priv, struct iwl_tx_queue *txq,
int slots_num, u32 txq_id)
{
memset(txq->meta, 0, sizeof(struct iwl_cmd_meta) * slots_num);
txq->need_update = 0;
/* Initialize queue's high/low-water marks, and head/tail indexes */
iwl_queue_init(priv, &txq->q, TFD_QUEUE_SIZE_MAX, slots_num, txq_id);
/* Tell device where to find queue */
iwlagn_tx_queue_init(priv, txq);
}
/*************** HOST COMMAND QUEUE FUNCTIONS *****/
/**