gianfar: Add per queue structure support
This patch introduces per tx and per rx queue structures.
Earlier the members of these structures were inside the
gfar_private structure.
Moving forward if we want to support multiple queues, we need
to refactor the gfar_private structure so that introduction of
multiple queues is easier.
Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 05732fa..a60f93f 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -7,8 +7,9 @@
*
* Author: Andy Fleming
* Maintainer: Kumar Gala
+ * Modifier: Sandeep Gopalpet <sandeep.kumar@freescale.com>
*
- * Copyright (c) 2002-2004 Freescale Semiconductor, Inc.
+ * Copyright 2002-2009 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -699,6 +700,76 @@
#define FSL_GIANFAR_DEV_HAS_BD_STASHING 0x00000200
#define FSL_GIANFAR_DEV_HAS_BUF_STASHING 0x00000400
+/**
+ * struct gfar_priv_tx_q - per tx queue structure
+ * @txlock: per queue tx spin lock
+ * @tx_skbuff:skb pointers
+ * @skb_curtx: to be used skb pointer
+ * @skb_dirtytx:the last used skb pointer
+ * @qindex: index of this queue
+ * @dev: back pointer to the dev structure
+ * @grp: back pointer to the group to which this queue belongs
+ * @tx_bd_base: First tx buffer descriptor
+ * @cur_tx: Next free ring entry
+ * @dirty_tx: First buffer in line to be transmitted
+ * @tx_ring_size: Tx ring size
+ * @num_txbdfree: number of free TxBds
+ * @txcoalescing: enable/disable tx coalescing
+ * @txic: transmit interrupt coalescing value
+ * @txcount: coalescing value if based on tx frame count
+ * @txtime: coalescing value if based on time
+ */
+struct gfar_priv_tx_q {
+ spinlock_t txlock __attribute__ ((aligned (SMP_CACHE_BYTES)));
+ struct sk_buff ** tx_skbuff;
+ /* Buffer descriptor pointers */
+ dma_addr_t tx_bd_dma_base;
+ struct txbd8 *tx_bd_base;
+ struct txbd8 *cur_tx;
+ struct txbd8 *dirty_tx;
+ struct net_device *dev;
+ u16 skb_curtx;
+ u16 skb_dirtytx;
+ u16 qindex;
+ unsigned int tx_ring_size;
+ unsigned int num_txbdfree;
+ /* Configuration info for the coalescing features */
+ unsigned char txcoalescing;
+ unsigned long txic;
+ unsigned short txcount;
+ unsigned short txtime;
+};
+
+/**
+ * struct gfar_priv_rx_q - per rx queue structure
+ * @rxlock: per queue rx spin lock
+ * @napi: the napi poll function
+ * @rx_skbuff: skb pointers
+ * @skb_currx: currently use skb pointer
+ * @rx_bd_base: First rx buffer descriptor
+ * @cur_rx: Next free rx ring entry
+ * @qindex: index of this queue
+ * @dev: back pointer to the dev structure
+ * @rx_ring_size: Rx ring size
+ * @rxcoalescing: enable/disable rx-coalescing
+ * @rxic: receive interrupt coalescing vlaue
+ */
+
+struct gfar_priv_rx_q {
+ spinlock_t rxlock __attribute__ ((aligned (SMP_CACHE_BYTES)));
+ struct napi_struct napi;
+ struct sk_buff ** rx_skbuff;
+ struct rxbd8 *rx_bd_base;
+ struct rxbd8 *cur_rx;
+ struct net_device *dev;
+ u16 skb_currx;
+ u16 qindex;
+ unsigned int rx_ring_size;
+ /* RX Coalescing values */
+ unsigned char rxcoalescing;
+ unsigned long rxic;
+};
+
/* Struct stolen almost completely (and shamelessly) from the FCC enet source
* (Ok, that's not so true anymore, but there is a family resemblence)
* The GFAR buffer descriptors track the ring buffers. The rx_bd_base
@@ -709,52 +780,15 @@
* the buffer descriptor determines the actual condition.
*/
struct gfar_private {
- /* Fields controlled by TX lock */
- spinlock_t txlock;
-
- /* Pointer to the array of skbuffs */
- struct sk_buff ** tx_skbuff;
-
- /* next free skb in the array */
- u16 skb_curtx;
-
- /* First skb in line to be transmitted */
- u16 skb_dirtytx;
-
- /* Configuration info for the coalescing features */
- unsigned char txcoalescing;
- unsigned long txic;
-
- /* Buffer descriptor pointers */
- dma_addr_t tx_bd_dma_base;
- struct txbd8 *tx_bd_base; /* First tx buffer descriptor */
- struct txbd8 *cur_tx; /* Next free ring entry */
- struct txbd8 *dirty_tx; /* First buffer in line
- to be transmitted */
- unsigned int tx_ring_size;
- unsigned int num_txbdfree; /* number of TxBDs free */
-
- /* RX Locked fields */
- spinlock_t rxlock;
struct device_node *node;
struct net_device *ndev;
struct of_device *ofdev;
- struct napi_struct napi;
- /* skb array and index */
- struct sk_buff ** rx_skbuff;
- u16 skb_currx;
+ struct gfar_priv_tx_q *tx_queue;
+ struct gfar_priv_rx_q *rx_queue;
- /* RX Coalescing values */
- unsigned char rxcoalescing;
- unsigned long rxic;
-
- struct rxbd8 *rx_bd_base; /* First Rx buffers */
- struct rxbd8 *cur_rx; /* Next free rx ring entry */
-
- /* RX parameters */
- unsigned int rx_ring_size;
+ /* RX per device parameters */
unsigned int rx_buffer_size;
unsigned int rx_stash_size;
unsigned int rx_stash_index;