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WAN: convert HD64572-based drivers to NAPI.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa
parent
302243922b
commit
abc9d91a35
3 changed files with 71 additions and 37 deletions
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@ -1,7 +1,7 @@
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/*
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* Hitachi (now Renesas) SCA-II HD64572 driver for Linux
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*
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* Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
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* Copyright (C) 1998-2008 Krzysztof Halasa <khc@pm.waw.pl>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License
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@ -45,6 +45,8 @@
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#include <asm/uaccess.h>
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#include "hd64572.h"
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#define NAPI_WEIGHT 16
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#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET)
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#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
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#define get_dmac_tx(port) (phy_node(port) ? DMAC1TX_OFFSET : DMAC0TX_OFFSET)
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@ -53,6 +55,7 @@
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#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02)
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#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04)
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static int sca_poll(struct napi_struct *napi, int budget);
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static inline struct net_device *port_to_dev(port_t *port)
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{
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@ -86,6 +89,20 @@ static inline port_t* dev_to_port(struct net_device *dev)
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return dev_to_hdlc(dev)->priv;
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}
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static inline void enable_intr(port_t *port)
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{
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/* DMA & MSCI IRQ enable */
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/* IR0_TXINT | IR0_RXINTA | IR0_DMIB* | IR0_DMIA* */
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sca_outl(sca_inl(IER0, port->card) |
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(phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, port->card);
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}
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static inline void disable_intr(port_t *port)
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{
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sca_outl(sca_inl(IER0, port->card) &
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(phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, port->card);
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}
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static inline u16 next_desc(port_t *port, u16 desc, int transmit)
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{
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return (desc + 1) % (transmit ? port_to_card(port)->tx_ring_buffers
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@ -206,6 +223,7 @@ static void sca_init_port(port_t *port)
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}
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}
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sca_set_carrier(port);
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netif_napi_add(port_to_dev(port), &port->napi, sca_poll, NAPI_WEIGHT);
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}
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@ -256,17 +274,18 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
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dev->stats.rx_packets++;
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dev->stats.rx_bytes += skb->len;
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skb->protocol = hdlc_type_trans(skb, dev);
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netif_rx(skb);
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netif_receive_skb(skb);
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}
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/* Receive DMA interrupt service */
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static inline void sca_rx_intr(port_t *port)
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/* Receive DMA service */
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static inline int sca_rx_done(port_t *port, int budget)
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{
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struct net_device *dev = port_to_dev(port);
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u16 dmac = get_dmac_rx(port);
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card_t *card = port_to_card(port);
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u8 stat = sca_in(DSR_RX(phy_node(port)), card); /* read DMA Status */
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int received = 0;
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/* Reset DSR status bits */
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sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
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@ -276,7 +295,7 @@ static inline void sca_rx_intr(port_t *port)
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/* Dropped one or more frames */
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dev->stats.rx_over_errors++;
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while (1) {
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while (received < budget) {
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u32 desc_off = desc_offset(port, port->rxin, 0);
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pkt_desc __iomem *desc;
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u32 cda = sca_inl(dmac + CDAL, card);
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@ -299,8 +318,10 @@ static inline void sca_rx_intr(port_t *port)
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dev->stats.rx_crc_errors++;
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if (stat & ST_RX_EOM)
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port->rxpart = 0; /* received last fragment */
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} else
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} else {
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sca_rx(card, port, desc, port->rxin);
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received++;
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}
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/* Set new error descriptor address */
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sca_outl(desc_off, dmac + EDAL, card);
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@ -309,11 +330,12 @@ static inline void sca_rx_intr(port_t *port)
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/* make sure RX DMA is enabled */
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sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
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return received;
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}
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/* Transmit DMA interrupt service */
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static inline void sca_tx_intr(port_t *port)
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/* Transmit DMA service */
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static inline void sca_tx_done(port_t *port)
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{
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struct net_device *dev = port_to_dev(port);
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u16 dmac = get_dmac_tx(port);
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@ -348,27 +370,43 @@ static inline void sca_tx_intr(port_t *port)
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}
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static int sca_poll(struct napi_struct *napi, int budget)
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{
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port_t *port = container_of(napi, port_t, napi);
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u8 stat = sca_intr_status(port->card);
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int received = 0;
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if (stat & SCA_INTR_MSCI(port->phy_node))
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sca_msci_intr(port);
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if (stat & SCA_INTR_DMAC_TX(port->phy_node))
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sca_tx_done(port);
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if (stat & SCA_INTR_DMAC_RX(port->phy_node))
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received = sca_rx_done(port, budget);
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if (received < budget) {
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netif_rx_complete(port->dev, napi);
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enable_intr(port);
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}
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return received;
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}
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static irqreturn_t sca_intr(int irq, void* dev_id)
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{
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card_t *card = dev_id;
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int i;
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u8 stat;
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u8 stat = sca_intr_status(card);
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int handled = 0;
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while((stat = sca_intr_status(card)) != 0) {
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handled = 1;
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for (i = 0; i < 2; i++) {
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port_t *port = get_port(card, i);
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if (port) {
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if (stat & SCA_INTR_MSCI(i))
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sca_msci_intr(port);
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if (stat & SCA_INTR_DMAC_RX(i))
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sca_rx_intr(port);
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if (stat & SCA_INTR_DMAC_TX(i))
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sca_tx_intr(port);
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}
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for (i = 0; i < 2; i++) {
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port_t *port = get_port(card, i);
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if (port && (stat & (SCA_INTR_MSCI(i) | SCA_INTR_DMAC_RX(i) |
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SCA_INTR_DMAC_TX(i)))) {
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handled = 1;
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disable_intr(port);
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netif_rx_schedule(port->dev, &port->napi);
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}
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}
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@ -470,18 +508,12 @@ static void sca_open(struct net_device *dev)
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sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
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/* We're using the following interrupts:
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- TXINT (DMAC completed all transmisions, underrun or DCD change)
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- TXINT (DMAC completed all transmissions, underrun or DCD change)
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- all DMA interrupts
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*/
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sca_set_carrier(port);
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/* MSCI TXINT and RXINTA interrupt enable */
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sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0,
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card);
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/* DMA & MSCI IRQ enable */
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sca_outl(sca_inl(IER0, card) |
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(phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card);
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sca_out(port->tmc, msci + TMCR, card);
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sca_out(port->tmc, msci + TMCT, card);
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@ -490,6 +522,9 @@ static void sca_open(struct net_device *dev)
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sca_out(CMD_TX_ENABLE, msci + CMD, card);
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sca_out(CMD_RX_ENABLE, msci + CMD, card);
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sca_set_carrier(port);
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enable_intr(port);
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napi_enable(&port->napi);
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netif_start_queue(dev);
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}
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@ -497,14 +532,11 @@ static void sca_open(struct net_device *dev)
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static void sca_close(struct net_device *dev)
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{
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port_t *port = dev_to_port(dev);
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card_t* card = port_to_card(port);
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/* reset channel */
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sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port));
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/* disable DMA & MSCI IRQ */
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sca_outl(sca_inl(IER0, card) &
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(phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card);
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disable_intr(port);
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napi_disable(&port->napi);
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netif_stop_queue(dev);
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}
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@ -78,6 +78,7 @@ typedef struct {
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typedef struct port_s {
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struct napi_struct napi;
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struct net_device *dev;
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struct card_s *card;
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spinlock_t lock; /* TX lock */
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@ -481,6 +482,7 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
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else
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port->iface = IF_IFACE_V35;
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sca_init_port(port);
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if (register_hdlc_device(dev)) {
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printk(KERN_ERR "pc300: unable to register hdlc "
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"device\n");
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@ -488,7 +490,6 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
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pc300_pci_remove_one(pdev);
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return -ENOBUFS;
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}
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sca_init_port(port); /* Set up SCA memory */
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printk(KERN_INFO "%s: PC300 node %d\n",
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dev->name, port->phy_node);
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@ -65,6 +65,7 @@ typedef struct {
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typedef struct port_s {
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struct napi_struct napi;
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struct net_device *dev;
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struct card_s *card;
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spinlock_t lock; /* TX lock */
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@ -423,6 +424,7 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
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hdlc->xmit = sca_xmit;
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port->settings.clock_type = CLOCK_EXT;
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port->card = card;
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sca_init_port(port);
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if (register_hdlc_device(dev)) {
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printk(KERN_ERR "pci200syn: unable to register hdlc "
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"device\n");
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@ -430,7 +432,6 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
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pci200_pci_remove_one(pdev);
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return -ENOBUFS;
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}
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sca_init_port(port); /* Set up SCA memory */
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printk(KERN_INFO "%s: PCI200SYN node %d\n",
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dev->name, port->phy_node);
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