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From: Wey-Yi Guy <wey-yi.w.guy@intel.com>
To: linville@tuxdriver.com
Cc: linux-wireless@vger.kernel.org,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
	Wey-Yi Guy <wey-yi.w.guy@intel.com>
Subject: [PATCH 51/60] iwlagn: upper layer uses slabs to allocate tx cmds
Date: Thu, 25 Aug 2011 23:11:23 -0700	[thread overview]
Message-ID: <1314339092-20797-52-git-send-email-wey-yi.w.guy@intel.com> (raw)
In-Reply-To: <1314339092-20797-1-git-send-email-wey-yi.w.guy@intel.com>

From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

In a near future, the upper layer won't be aware of the tx queues.
This allows to remove one place where the upper layer needed to
provide the tx queue index to the transport layer.
This also saves around 1.5MB.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
---
 drivers/net/wireless/iwlwifi/iwl-agn-tx.c    |   19 +++++++-
 drivers/net/wireless/iwlwifi/iwl-agn-ucode.c |    9 ++++
 drivers/net/wireless/iwlwifi/iwl-agn.c       |    2 +
 drivers/net/wireless/iwlwifi/iwl-dev.h       |    2 +
 drivers/net/wireless/iwlwifi/iwl-trans.c     |   57 +++++++++-----------------
 drivers/net/wireless/iwlwifi/iwl-trans.h     |   17 +++-----
 6 files changed, 55 insertions(+), 51 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
index 2b8fb53..bf66575 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c
@@ -276,6 +276,7 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct iwl_station_priv *sta_priv = NULL;
 	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
+	struct iwl_device_cmd *dev_cmd = NULL;
 	struct iwl_tx_cmd *tx_cmd;
 	int txq_id;
 
@@ -386,10 +387,14 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 		}
 	}
 
-	tx_cmd = iwl_trans_get_tx_cmd(trans(priv), txq_id);
-	if (unlikely(!tx_cmd))
+	dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC);
+
+	if (unlikely(!dev_cmd))
 		goto drop_unlock_sta;
 
+	memset(dev_cmd, 0, sizeof(*dev_cmd));
+	tx_cmd = &dev_cmd->cmd.tx;
+
 	/* Copy MAC header from skb into command buffer */
 	memcpy(tx_cmd->hdr, hdr, hdr_len);
 
@@ -409,8 +414,9 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 	iwl_update_stats(priv, true, fc, len);
 
 	info->driver_data[0] = ctx;
+	info->driver_data[1] = dev_cmd;
 
-	if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg))
+	if (iwl_trans_tx(trans(priv), skb, dev_cmd, txq_id, fc, is_agg))
 		goto drop_unlock_sta;
 
 	if (ieee80211_is_data_qos(fc)) {
@@ -436,6 +442,8 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb)
 	return 0;
 
 drop_unlock_sta:
+	if (dev_cmd)
+		kmem_cache_free(priv->tx_cmd_pool, dev_cmd);
 	spin_unlock(&priv->shrd->sta_lock);
 drop_unlock_priv:
 	spin_unlock_irqrestore(&priv->shrd->lock, flags);
@@ -1010,6 +1018,8 @@ void iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
 
 			info = IEEE80211_SKB_CB(skb);
 			ctx = info->driver_data[0];
+			kmem_cache_free(priv->tx_cmd_pool,
+					(info->driver_data[1]));
 
 			memset(&info->status, 0, sizeof(info->status));
 
@@ -1184,6 +1194,9 @@ void iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv,
 						    info);
 		}
 
+		info = IEEE80211_SKB_CB(skb);
+		kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1]));
+
 		ieee80211_tx_status_irqsafe(priv->hw, skb);
 	}
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c b/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c
index 02b00d1..ddb255a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-ucode.c
@@ -351,6 +351,15 @@ static int iwlagn_alive_notify(struct iwl_priv *priv)
 {
 	int ret;
 
+	if (!priv->tx_cmd_pool)
+		priv->tx_cmd_pool =
+			kmem_cache_create("iwlagn_dev_cmd",
+					  sizeof(struct iwl_device_cmd),
+					  sizeof(void *), 0, NULL);
+
+	if (!priv->tx_cmd_pool)
+		return -ENOMEM;
+
 	iwl_trans_tx_start(trans(priv));
 
 	ret = iwlagn_send_wimax_coex(priv);
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index d3e103c..cfb4a4a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -3124,6 +3124,8 @@ static void iwl_uninit_drv(struct iwl_priv *priv)
 	iwl_calib_free_results(priv);
 	iwl_free_geos(priv);
 	iwl_free_channel_map(priv);
+	if (priv->tx_cmd_pool)
+		kmem_cache_destroy(priv->tx_cmd_pool);
 	kfree(priv->scan_cmd);
 	kfree(priv->beacon_cmd);
 #ifdef CONFIG_IWLWIFI_DEBUGFS
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 5e79c14..977015b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -36,6 +36,7 @@
 #include <linux/kernel.h>
 #include <linux/wait.h>
 #include <linux/leds.h>
+#include <linux/slab.h>
 #include <net/ieee80211_radiotap.h>
 
 #include "iwl-eeprom.h"
@@ -1053,6 +1054,7 @@ struct iwl_priv {
 	struct ieee80211_hw *hw;
 	struct ieee80211_channel *ieee_channels;
 	struct ieee80211_rate *ieee_rates;
+	struct kmem_cache *tx_cmd_pool;
 	struct iwl_cfg *cfg;
 
 	enum ieee80211_band band;
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c
index e545898..7de042c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.c
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.c
@@ -317,12 +317,13 @@ static int iwl_trans_txq_alloc(struct iwl_trans *trans,
 	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;
-	}
+	if (txq_id == trans->shrd->cmd_queue)
+		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,
@@ -355,7 +356,7 @@ error:
 	txq->skbs = NULL;
 	/* since txq->cmd has been zeroed,
 	 * all non allocated cmd[i] will be NULL */
-	if (txq->cmd)
+	if (txq->cmd && txq_id == trans->shrd->cmd_queue)
 		for (i = 0; i < slots_num; i++)
 			kfree(txq->cmd[i]);
 	kfree(txq->meta);
@@ -442,8 +443,10 @@ static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id)
 	iwl_tx_queue_unmap(trans, txq_id);
 
 	/* De-alloc array of command/tx buffers */
-	for (i = 0; i < txq->q.n_window; i++)
-		kfree(txq->cmd[i]);
+
+	if (txq_id == trans->shrd->cmd_queue)
+		for (i = 0; i < txq->q.n_window; i++)
+			kfree(txq->cmd[i]);
 
 	/* De-alloc circular buffer of TFDs */
 	if (txq->q.n_bd) {
@@ -1009,37 +1012,13 @@ static void iwl_trans_pcie_stop_device(struct iwl_trans *trans)
 	iwl_apm_stop(priv(trans));
 }
 
-static struct iwl_tx_cmd *iwl_trans_pcie_get_tx_cmd(struct iwl_trans *trans,
-						int txq_id)
-{
-	struct iwl_priv *priv = priv(trans);
-	struct iwl_tx_queue *txq = &priv->txq[txq_id];
-	struct iwl_queue *q = &txq->q;
-	struct iwl_device_cmd *dev_cmd;
-
-	if (unlikely(iwl_queue_space(q) < q->high_mark))
-		return NULL;
-
-	/*
-	 * Set up the Tx-command (not MAC!) header.
-	 * Store the chosen Tx queue and TFD index within the sequence field;
-	 * after Tx, uCode's Tx response will return this value so driver can
-	 * locate the frame within the tx queue and do post-tx processing.
-	 */
-	dev_cmd = txq->cmd[q->write_ptr];
-	memset(dev_cmd, 0, sizeof(*dev_cmd));
-	dev_cmd->hdr.cmd = REPLY_TX;
-	dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
-				INDEX_TO_SEQ(q->write_ptr)));
-	return &dev_cmd->cmd.tx;
-}
-
 static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb,
-		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu)
+		struct iwl_device_cmd *dev_cmd, int txq_id,
+		__le16 fc, bool ampdu)
 {
 	struct iwl_tx_queue *txq = &priv->txq[txq_id];
 	struct iwl_queue *q = &txq->q;
-	struct iwl_device_cmd *dev_cmd = txq->cmd[q->write_ptr];
+	struct iwl_tx_cmd *tx_cmd = &dev_cmd->cmd.tx;
 	struct iwl_cmd_meta *out_meta;
 
 	dma_addr_t phys_addr = 0;
@@ -1051,6 +1030,11 @@ static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb,
 
 	/* Set up driver data for this TFD */
 	txq->skbs[q->write_ptr] = skb;
+	txq->cmd[q->write_ptr] = dev_cmd;
+
+	dev_cmd->hdr.cmd = REPLY_TX;
+	dev_cmd->hdr.sequence = cpu_to_le16((u16)(QUEUE_TO_SEQ(txq_id) |
+				INDEX_TO_SEQ(q->write_ptr)));
 
 	/* Set up first empty entry in queue's array of Tx/cmd buffers */
 	out_meta = &txq->meta[q->write_ptr];
@@ -1862,7 +1846,6 @@ const struct iwl_trans_ops trans_ops_pcie = {
 	.send_cmd = iwl_trans_pcie_send_cmd,
 	.send_cmd_pdu = iwl_trans_pcie_send_cmd_pdu,
 
-	.get_tx_cmd = iwl_trans_pcie_get_tx_cmd,
 	.tx = iwl_trans_pcie_tx,
 	.reclaim = iwl_trans_pcie_reclaim,
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 011c824..0691d39 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -76,6 +76,7 @@ struct iwl_priv;
 struct iwl_rxon_context;
 struct iwl_host_cmd;
 struct iwl_shared;
+struct iwl_device_cmd;
 
 /**
  * struct iwl_trans_ops - transport specific operations
@@ -90,7 +91,6 @@ struct iwl_shared;
  * @stop_device:stops the whole device (embedded CPU put to reset)
  * @send_cmd:send a host command
  * @send_cmd_pdu:send a host command: flags can be CMD_*
- * @get_tx_cmd: returns a pointer to a new Tx cmd for the upper layer use
  * @tx: send an skb
  * @reclaim: free packet until ssn. Returns a list of freed packets.
  * @txq_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
@@ -117,9 +117,9 @@ struct iwl_trans_ops {
 
 	int (*send_cmd_pdu)(struct iwl_trans *trans, u8 id, u32 flags, u16 len,
 		     const void *data);
-	struct iwl_tx_cmd * (*get_tx_cmd)(struct iwl_trans *trans, int txq_id);
 	int (*tx)(struct iwl_priv *priv, struct sk_buff *skb,
-		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu);
+		struct iwl_device_cmd *dev_cmd,
+		int txq_id, __le16 fc, bool ampdu);
 	void (*reclaim)(struct iwl_trans *trans, int txq_id, int ssn,
 			u32 status, struct sk_buff_head *skbs);
 
@@ -190,16 +190,11 @@ static inline int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id,
 	return trans->ops->send_cmd_pdu(trans, id, flags, len, data);
 }
 
-static inline struct iwl_tx_cmd *iwl_trans_get_tx_cmd(struct iwl_trans *trans,
-					int txq_id)
-{
-	return trans->ops->get_tx_cmd(trans, txq_id);
-}
-
 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
-		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu)
+		struct iwl_device_cmd *dev_cmd,
+		int txq_id, __le16 fc, bool ampdu)
 {
-	return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu);
+	return trans->ops->tx(priv(trans), skb, dev_cmd, txq_id, fc, ampdu);
 }
 
 static inline void iwl_trans_reclaim(struct iwl_trans *trans, int txq_id,
-- 
1.7.0.4


  parent reply	other threads:[~2011-08-26  6:53 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-26  6:10 [RESEND PATCH 00/60] update for 3.2 Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 01/60] iwlagn: Rename iwlcore prefix Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 02/60] iwlagn: remove out-dated comments Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 03/60] iwlagn: use iwl_get_debug_level instead of iwl_debug_level Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 04/60] iwlagn: introduce iwl-shared.h Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 05/60] iwlagn: introduce struct iwl-shared - known by all layers Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 06/60] iwlagn: debug_level moves to struct iwl_shared Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 07/60] iwlagn: hw_params moves to iwl_shared Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 08/60] iwlagn: cmd_queue " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 09/60] iwlagn: workqueue " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 10/60] iwlagn: priv->status " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 11/60] iwlagn: priv->lock " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 12/60] iwlagn: priv->mutex " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 13/60] iwlagn: modify the debug macro to be usable by all the layers Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 14/60] iwlagn: add IWL_DEBUG_FW_ERRORS Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 15/60] iwlagn: priv->sta_lock moves to iwl_shared Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 16/60] iwlagn: bus layer chooses its transport layer Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 17/60] iwlagn: add comments to iwl_bus / iwl_trans Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 18/60] iwlagn: transport handler can register debugfs entries Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 19/60] iwlagn: iwl_rx_queue moves to the iwl_trans_pcie Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 20/60] iwlagn: move iwl_suspend / iwl_resume to the transport layer Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 21/60] iwlagn: move ISR related data to " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 22/60] iwlagn: move the NIC error flow to the " Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 23/60] iwlagn: enable 11n aggregation without checking traffic load Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 24/60] iwlagn: support small form factor SKU of 6205 Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 25/60] iwlagn: more comments for bt channel inhibition Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 26/60] iwlagn: add comments to module parameters Wey-Yi Guy
2011-08-26  6:10 ` [PATCH 27/60] iwlagn: move isr_statistics to transport layer Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 28/60] iwlagn: reclaim the packets in " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 29/60] iwlagn: move reclaim related functions Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 30/60] iwlagn: move scd_bc_tbls and scd_base_addr to iwl_trans_pcie Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 31/60] iwlagn: fix the check of IWLAGN_FIRST_AMPDU_QUEUE Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 33/60] iwlagn: move iwl_free_pages to iwl-shared.h Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 34/60] iwlagn: transport layer should receive iwl_trans Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 35/60] iwlagn: move hcmd_lock to transport layer Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 36/60] iwlagn: move dump_csr and dump_fh " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 37/60] iwlagn: remove references to priv from the " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 38/60] iwlagn: remove unused parameters from hw_params Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 39/60] iwlagn: iwl-dev.h doesn't include iwl-fh.h any more Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 40/60] iwlagn: move Keep Warm to transport layer Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 41/60] iwlagn: add missing includes Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 42/60] iwlagn: all function iwl-io.c receive iwl_bus Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 43/60] iwlagn: fix compile warnings when CONFIG_PM_SLEEP is not set Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 44/60] iwlagn: iwl-pci doesn't include iwl-dev any more Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 45/60] iwlagn: adding special "D" SKU for 2000 series Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 46/60] iwlagn: iwl_tid_data moves to iwl-shared Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 47/60] iwlagn: remove dereferences of priv from transport Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 48/60] iwlagn: stop the device before freeing it Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 49/60] iwlagn: upper layer stores iwl_rxon_context in skb's CB Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 50/60] iwlagn: set tx_fifo for ampdu in transport layer Wey-Yi Guy
2011-08-26  6:11 ` Wey-Yi Guy [this message]
2011-08-26  6:11 ` [PATCH 52/60] iwlagn: move the mapping ac to queue / fifo to transport Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 53/60] iwlagn: allocate resources for TX BA session in transport Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 54/60] iwlagn: move the check_empty logic to the transport layer Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 55/60] iwlagn: move the disable agg logic to " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 56/60] iwlagn: cosmetics in iwl-trans.h Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 57/60] iwlagn: move wait_for_tx_queue_empty to transport layer Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 58/60] iwlagn: move check_stuck_queue " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 59/60] iwlagn: move the stop / wake queue logic " Wey-Yi Guy
2011-08-26  6:11 ` [PATCH 60/60] iwlagn: move tx queues " Wey-Yi Guy
  -- strict thread matches above, loose matches on Subject: below --
2011-08-13 17:37 [PATCH 00/60] update for 3.2 Wey-Yi Guy
2011-08-13 17:38 ` [PATCH 51/60] iwlagn: upper layer uses slabs to allocate tx cmds Wey-Yi Guy

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