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stmmac: review private structure fields 

recently many new supports have been added in the stmmac driver w/o taking care
about where each new field had to be placed inside the private structure for
guaranteeing the best cache usage.
This is what I wanted in the beginning, so this patch reorganizes all the fields
in order to keep adjacent fields for cache effect.
I have also tried to optimize them by using pahole.

V2: do not abuse with ____cacheline_aligned_in_smp and keep fields that
potentially could stay in the same cache-line for better usage in SMP systems.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Giuseppe CAVALLARO 2013-04-08 02:10:02 +00:00 committed by David S. Miller
parent ceb694997e
commit 1bb6dea8cc
1 changed files with 35 additions and 35 deletions
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70
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View File

@ -35,36 +35,45 @@
struct stmmac_priv {
/* Frequently used values are kept adjacent for cache effect */
struct dma_desc *dma_tx ____cacheline_aligned; /* Basic TX desc */
struct dma_extended_desc *dma_etx; /* Extended TX descriptor */
dma_addr_t dma_tx_phy;
struct dma_extended_desc *dma_etx ____cacheline_aligned_in_smp;
struct dma_desc *dma_tx;
struct sk_buff **tx_skbuff;
dma_addr_t *tx_skbuff_dma;
unsigned int cur_tx;
unsigned int dirty_tx;
unsigned int dma_tx_size;
u32 tx_count_frames;
u32 tx_coal_frames;
u32 tx_coal_timer;
dma_addr_t *tx_skbuff_dma;
dma_addr_t dma_tx_phy;
int tx_coalesce;
int hwts_tx_en;
spinlock_t tx_lock;
bool tx_path_in_lpi_mode;
struct timer_list txtimer;
struct dma_desc *dma_rx; /* Basic RX descriptor */
struct dma_extended_desc *dma_erx; /* Extended RX descriptor */
struct dma_desc *dma_rx ____cacheline_aligned_in_smp;
struct dma_extended_desc *dma_erx;
struct sk_buff **rx_skbuff;
unsigned int cur_rx;
unsigned int dirty_rx;
struct sk_buff **rx_skbuff;
dma_addr_t *rx_skbuff_dma;
struct net_device *dev;
dma_addr_t dma_rx_phy;
unsigned int dma_rx_size;
unsigned int dma_buf_sz;
u32 rx_riwt;
int hwts_rx_en;
dma_addr_t *rx_skbuff_dma;
dma_addr_t dma_rx_phy;
struct napi_struct napi ____cacheline_aligned_in_smp;
void __iomem *ioaddr;
struct net_device *dev;
struct device *device;
struct mac_device_info *hw;
void __iomem *ioaddr;
struct stmmac_extra_stats xstats;
struct napi_struct napi;
int no_csum_insertion;
spinlock_t lock;
struct phy_device *phydev;
struct phy_device *phydev ____cacheline_aligned_in_smp;
int oldlink;
int speed;
int oldduplex;
@ -73,39 +82,30 @@ struct stmmac_priv {
struct mii_bus *mii;
int mii_irq[PHY_MAX_ADDR];
struct stmmac_extra_stats xstats ____cacheline_aligned_in_smp;
struct plat_stmmacenet_data *plat;
struct dma_features dma_cap;
struct stmmac_counters mmc;
int hw_cap_support;
int synopsys_id;
u32 msg_enable;
spinlock_t lock;
spinlock_t tx_lock;
int wolopts;
int wol_irq;
struct plat_stmmacenet_data *plat;
struct stmmac_counters mmc;
struct dma_features dma_cap;
int hw_cap_support;
struct clk *stmmac_clk;
int clk_csr;
int synopsys_id;
struct timer_list eee_ctrl_timer;
bool tx_path_in_lpi_mode;
int lpi_irq;
int eee_enabled;
int eee_active;
int tx_lpi_timer;
struct timer_list txtimer;
u32 tx_count_frames;
u32 tx_coal_frames;
u32 tx_coal_timer;
int use_riwt;
u32 rx_riwt;
int pcs;
unsigned int mode;
int extend_desc;
int pcs;
int hwts_tx_en;
int hwts_rx_en;
unsigned int default_addend;
u32 adv_ts;
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_clock_ops;
unsigned int default_addend;
u32 adv_ts;
int use_riwt;
spinlock_t ptp_lock;
};