Re: [PATCH net-next v6 3/6] net: stmmac: Refactor FPE functions to generic version
From: Vladimir Oltean <olteanv@gmail.com>
Date: 2024-10-30 11:47:11
Also in:
linux-arm-kernel, lkml
On Wed, Oct 30, 2024 at 01:36:12PM +0800, Furong Xu wrote:
FPE implementation for DWMAC4 and DWXGMAC differs only for: 1) Offset address of MAC_FPE_CTRL_STS and MTL_FPE_CTRL_STS 2) FPRQ(Frame Preemption Residue Queue) field in MAC_RxQ_Ctrl1 3) Bit offset of Frame Preemption Interrupt Enable Refactor FPE functions to avoid code duplication.
I would add "and to simplify the code flow by avoiding the use of function pointers".
quoted hunk
Signed-off-by: Furong Xu <redacted> ---diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c index 70ea475046f0..ee86658f77b4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.c@@ -27,6 +27,20 @@ #define STMMAC_MAC_FPE_CTRL_STS_SVER BIT(1) #define STMMAC_MAC_FPE_CTRL_STS_EFPE BIT(0) +struct stmmac_fpe_reg { + const u32 mac_fpe_reg; /* offset of MAC_FPE_CTRL_STS */ + const u32 mtl_fpe_reg; /* offset of MTL_FPE_CTRL_STS */ + const u32 rxq_ctrl1_reg; /* offset of MAC_RxQ_Ctrl1 */ + const u32 fprq_mask; /* Frame Preemption Residue Queue */ + const u32 int_en_reg; /* offset of MAC_Interrupt_Enable */ + const u32 int_en_bit; /* Frame Preemption Interrupt Enable */ +}; + +bool stmmac_fpe_supported(struct stmmac_priv *priv) +{ + return (priv->dma_cap.fpesel && priv->fpe_cfg.reg); +}
This is a separate logical change from just refactoring. Refactoring changes (which are noisy) should not have functional changes. Could the introduction and use of stmmac_fpe_supported() please be a separate patch? Also, parentheses are not necessary.
quoted hunk
+ void stmmac_fpe_link_state_handle(struct stmmac_priv *priv, bool is_up) { struct stmmac_fpe_cfg *fpe_cfg = &priv->fpe_cfg;@@ -38,25 +52,19 @@ void stmmac_fpe_link_state_handle(struct stmmac_priv *priv, bool is_up) if (is_up && fpe_cfg->pmac_enabled) { /* VERIFY process requires pmac enabled when NIC comes up */ - stmmac_fpe_configure(priv, priv->ioaddr, fpe_cfg, - priv->plat->tx_queues_to_use, - priv->plat->rx_queues_to_use, - false, true); + stmmac_fpe_configure(priv, false, true); /* New link => maybe new partner => new verification process */ stmmac_fpe_apply(priv); } else { /* No link => turn off EFPE */ - stmmac_fpe_configure(priv, priv->ioaddr, fpe_cfg, - priv->plat->tx_queues_to_use, - priv->plat->rx_queues_to_use, - false, false); + stmmac_fpe_configure(priv, false, false); } spin_unlock_irqrestore(&fpe_cfg->lock, flags); } -void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) +static void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) { struct stmmac_fpe_cfg *fpe_cfg = &priv->fpe_cfg;@@ -68,8 +76,7 @@ void stmmac_fpe_event_status(struct stmmac_priv *priv, int status) /* LP has sent verify mPacket */ if ((status & FPE_EVENT_RVER) == FPE_EVENT_RVER) - stmmac_fpe_send_mpacket(priv, priv->ioaddr, fpe_cfg, - MPACKET_RESPONSE); + stmmac_fpe_send_mpacket(priv, MPACKET_RESPONSE); /* Local has sent verify mPacket */ if ((status & FPE_EVENT_TVER) == FPE_EVENT_TVER &&@@ -107,8 +114,7 @@ static void stmmac_fpe_verify_timer(struct timer_list *t) case ETHTOOL_MM_VERIFY_STATUS_INITIAL: case ETHTOOL_MM_VERIFY_STATUS_VERIFYING: if (fpe_cfg->verify_retries != 0) { - stmmac_fpe_send_mpacket(priv, priv->ioaddr, - fpe_cfg, MPACKET_VERIFY); + stmmac_fpe_send_mpacket(priv, MPACKET_VERIFY); rearm = true; } else { fpe_cfg->status = ETHTOOL_MM_VERIFY_STATUS_FAILED;@@ -118,10 +124,7 @@ static void stmmac_fpe_verify_timer(struct timer_list *t) break; case ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED: - stmmac_fpe_configure(priv, priv->ioaddr, fpe_cfg, - priv->plat->tx_queues_to_use, - priv->plat->rx_queues_to_use, - true, true); + stmmac_fpe_configure(priv, true, true); break; default:@@ -154,6 +157,9 @@ void stmmac_fpe_init(struct stmmac_priv *priv) priv->fpe_cfg.status = ETHTOOL_MM_VERIFY_STATUS_DISABLED; timer_setup(&priv->fpe_cfg.verify_timer, stmmac_fpe_verify_timer, 0); spin_lock_init(&priv->fpe_cfg.lock); + + if (priv->dma_cap.fpesel && !priv->fpe_cfg.reg) + dev_info(priv->device, "FPE on this MAC is not supported by driver.\n");
This as well.
quoted hunk
} void stmmac_fpe_apply(struct stmmac_priv *priv)diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.h index 25725fd5182f..00e616d7cbf1 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_fpe.h@@ -22,24 +22,21 @@ struct stmmac_priv; struct stmmac_fpe_cfg; void stmmac_fpe_link_state_handle(struct stmmac_priv *priv, bool is_up); -void stmmac_fpe_event_status(struct stmmac_priv *priv, int status); +bool stmmac_fpe_supported(struct stmmac_priv *priv); void stmmac_fpe_init(struct stmmac_priv *priv); void stmmac_fpe_apply(struct stmmac_priv *priv); - -void dwmac5_fpe_configure(void __iomem *ioaddr, struct stmmac_fpe_cfg *cfg, - u32 num_txq, u32 num_rxq, - bool tx_enable, bool pmac_enable); -void dwmac5_fpe_send_mpacket(void __iomem *ioaddr, - struct stmmac_fpe_cfg *cfg, +void stmmac_fpe_configure(struct stmmac_priv *priv, bool tx_enable, + bool pmac_enable); +void stmmac_fpe_send_mpacket(struct stmmac_priv *priv, enum stmmac_mpacket_type type);
Sorry I noticed this just now. After the refactoring, stmmac_fpe_send_mpacket() is only used from stmmac_fpe.c, and thus can be unexported and made static. Same goes for enum stmmac_mpacket_type.
-int dwmac5_fpe_irq_status(void __iomem *ioaddr, struct net_device *dev); -int dwmac5_fpe_get_add_frag_size(const void __iomem *ioaddr); -void dwmac5_fpe_set_add_frag_size(void __iomem *ioaddr, u32 add_frag_size); +void stmmac_fpe_irq_status(struct stmmac_priv *priv); +int stmmac_fpe_get_add_frag_size(struct stmmac_priv *priv); +void stmmac_fpe_set_add_frag_size(struct stmmac_priv *priv, u32 add_frag_size); + int dwmac5_fpe_map_preemption_class(struct net_device *ndev, struct netlink_ext_ack *extack, u32 pclass); -void dwxgmac3_fpe_configure(void __iomem *ioaddr, struct stmmac_fpe_cfg *cfg, - u32 num_txq, u32 num_rxq, - bool tx_enable, bool pmac_enable); +extern const struct stmmac_fpe_reg dwmac5_fpe_reg; +extern const struct stmmac_fpe_reg dwxgmac3_fpe_reg; #endif