bff1c09640
The bit V_MAC_RX_PL_THRSH(4) was already set a few lines higher. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2954 lines
71 KiB
C
2954 lines
71 KiB
C
/*
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* Copyright (C) 2001,2002,2003,2004 Broadcom Corporation
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* Copyright (c) 2006, 2007 Maciej W. Rozycki
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*
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* This driver is designed for the Broadcom SiByte SOC built-in
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* Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp.
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*
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* Updated to the driver model and the PHY abstraction layer
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* by Maciej W. Rozycki.
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*/
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#include <linux/bug.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/phy.h>
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#include <linux/platform_device.h>
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#include <asm/cache.h>
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#include <asm/io.h>
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#include <asm/processor.h> /* Processor type for cache alignment. */
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/* This is only here until the firmware is ready. In that case,
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the firmware leaves the ethernet address in the register for us. */
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#ifdef CONFIG_SIBYTE_STANDALONE
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#define SBMAC_ETH0_HWADDR "40:00:00:00:01:00"
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#define SBMAC_ETH1_HWADDR "40:00:00:00:01:01"
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#define SBMAC_ETH2_HWADDR "40:00:00:00:01:02"
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#define SBMAC_ETH3_HWADDR "40:00:00:00:01:03"
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#endif
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/* These identify the driver base version and may not be removed. */
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#if 0
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static char version1[] __initdata =
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"sb1250-mac.c:1.00 1/11/2001 Written by Mitch Lichtenberg\n";
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#endif
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/* Operational parameters that usually are not changed. */
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#define CONFIG_SBMAC_COALESCE
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/* Time in jiffies before concluding the transmitter is hung. */
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#define TX_TIMEOUT (2*HZ)
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MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)");
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MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver");
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/* A few user-configurable values which may be modified when a driver
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module is loaded. */
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/* 1 normal messages, 0 quiet .. 7 verbose. */
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static int debug = 1;
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module_param(debug, int, S_IRUGO);
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MODULE_PARM_DESC(debug, "Debug messages");
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#ifdef CONFIG_SBMAC_COALESCE
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static int int_pktcnt_tx = 255;
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module_param(int_pktcnt_tx, int, S_IRUGO);
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MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count");
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static int int_timeout_tx = 255;
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module_param(int_timeout_tx, int, S_IRUGO);
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MODULE_PARM_DESC(int_timeout_tx, "TX timeout value");
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static int int_pktcnt_rx = 64;
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module_param(int_pktcnt_rx, int, S_IRUGO);
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MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count");
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static int int_timeout_rx = 64;
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module_param(int_timeout_rx, int, S_IRUGO);
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MODULE_PARM_DESC(int_timeout_rx, "RX timeout value");
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#endif
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#include <asm/sibyte/board.h>
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#include <asm/sibyte/sb1250.h>
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#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
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#include <asm/sibyte/bcm1480_regs.h>
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#include <asm/sibyte/bcm1480_int.h>
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#define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST
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#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
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#include <asm/sibyte/sb1250_regs.h>
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#include <asm/sibyte/sb1250_int.h>
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#else
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#error invalid SiByte MAC configuation
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#endif
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#include <asm/sibyte/sb1250_scd.h>
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#include <asm/sibyte/sb1250_mac.h>
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#include <asm/sibyte/sb1250_dma.h>
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#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
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#define UNIT_INT(n) (K_BCM1480_INT_MAC_0 + ((n) * 2))
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#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
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#define UNIT_INT(n) (K_INT_MAC_0 + (n))
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#else
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#error invalid SiByte MAC configuation
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#endif
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#ifdef K_INT_PHY
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#define SBMAC_PHY_INT K_INT_PHY
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#else
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#define SBMAC_PHY_INT PHY_POLL
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#endif
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/**********************************************************************
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* Simple types
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********************************************************************* */
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enum sbmac_speed {
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sbmac_speed_none = 0,
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sbmac_speed_10 = SPEED_10,
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sbmac_speed_100 = SPEED_100,
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sbmac_speed_1000 = SPEED_1000,
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};
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enum sbmac_duplex {
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sbmac_duplex_none = -1,
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sbmac_duplex_half = DUPLEX_HALF,
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sbmac_duplex_full = DUPLEX_FULL,
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};
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enum sbmac_fc {
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sbmac_fc_none,
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sbmac_fc_disabled,
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sbmac_fc_frame,
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sbmac_fc_collision,
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sbmac_fc_carrier,
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};
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enum sbmac_state {
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sbmac_state_uninit,
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sbmac_state_off,
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sbmac_state_on,
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sbmac_state_broken,
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};
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/**********************************************************************
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* Macros
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********************************************************************* */
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#define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \
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(d)->sbdma_dscrtable : (d)->f+1)
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#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
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#define SBMAC_MAX_TXDESCR 256
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#define SBMAC_MAX_RXDESCR 256
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#define ETHER_ADDR_LEN 6
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#define ENET_PACKET_SIZE 1518
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/*#define ENET_PACKET_SIZE 9216 */
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/**********************************************************************
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* DMA Descriptor structure
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********************************************************************* */
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struct sbdmadscr {
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uint64_t dscr_a;
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uint64_t dscr_b;
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};
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/**********************************************************************
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* DMA Controller structure
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********************************************************************* */
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struct sbmacdma {
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/*
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* This stuff is used to identify the channel and the registers
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* associated with it.
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*/
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struct sbmac_softc *sbdma_eth; /* back pointer to associated
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MAC */
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int sbdma_channel; /* channel number */
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int sbdma_txdir; /* direction (1=transmit) */
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int sbdma_maxdescr; /* total # of descriptors
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in ring */
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#ifdef CONFIG_SBMAC_COALESCE
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int sbdma_int_pktcnt;
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/* # descriptors rx/tx
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before interrupt */
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int sbdma_int_timeout;
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/* # usec rx/tx interrupt */
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#endif
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void __iomem *sbdma_config0; /* DMA config register 0 */
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void __iomem *sbdma_config1; /* DMA config register 1 */
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void __iomem *sbdma_dscrbase;
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/* descriptor base address */
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void __iomem *sbdma_dscrcnt; /* descriptor count register */
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void __iomem *sbdma_curdscr; /* current descriptor
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address */
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void __iomem *sbdma_oodpktlost;
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/* pkt drop (rx only) */
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/*
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* This stuff is for maintenance of the ring
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*/
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void *sbdma_dscrtable_unaligned;
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struct sbdmadscr *sbdma_dscrtable;
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/* base of descriptor table */
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struct sbdmadscr *sbdma_dscrtable_end;
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/* end of descriptor table */
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struct sk_buff **sbdma_ctxtable;
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/* context table, one
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per descr */
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dma_addr_t sbdma_dscrtable_phys;
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/* and also the phys addr */
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struct sbdmadscr *sbdma_addptr; /* next dscr for sw to add */
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struct sbdmadscr *sbdma_remptr; /* next dscr for sw
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to remove */
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};
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/**********************************************************************
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* Ethernet softc structure
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********************************************************************* */
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struct sbmac_softc {
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/*
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* Linux-specific things
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*/
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struct net_device *sbm_dev; /* pointer to linux device */
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struct napi_struct napi;
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struct phy_device *phy_dev; /* the associated PHY device */
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struct mii_bus *mii_bus; /* the MII bus */
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int phy_irq[PHY_MAX_ADDR];
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spinlock_t sbm_lock; /* spin lock */
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int sbm_devflags; /* current device flags */
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/*
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* Controller-specific things
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*/
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void __iomem *sbm_base; /* MAC's base address */
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enum sbmac_state sbm_state; /* current state */
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void __iomem *sbm_macenable; /* MAC Enable Register */
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void __iomem *sbm_maccfg; /* MAC Config Register */
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void __iomem *sbm_fifocfg; /* FIFO Config Register */
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void __iomem *sbm_framecfg; /* Frame Config Register */
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void __iomem *sbm_rxfilter; /* Receive Filter Register */
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void __iomem *sbm_isr; /* Interrupt Status Register */
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void __iomem *sbm_imr; /* Interrupt Mask Register */
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void __iomem *sbm_mdio; /* MDIO Register */
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enum sbmac_speed sbm_speed; /* current speed */
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enum sbmac_duplex sbm_duplex; /* current duplex */
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enum sbmac_fc sbm_fc; /* cur. flow control setting */
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int sbm_pause; /* current pause setting */
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int sbm_link; /* current link state */
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unsigned char sbm_hwaddr[ETHER_ADDR_LEN];
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struct sbmacdma sbm_txdma; /* only channel 0 for now */
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struct sbmacdma sbm_rxdma;
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int rx_hw_checksum;
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int sbe_idx;
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};
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/**********************************************************************
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* Externs
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********************************************************************* */
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/**********************************************************************
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* Prototypes
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********************************************************************* */
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static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
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int txrx, int maxdescr);
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static void sbdma_channel_start(struct sbmacdma *d, int rxtx);
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static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
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struct sk_buff *m);
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static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *m);
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static void sbdma_emptyring(struct sbmacdma *d);
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static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d);
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static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
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int work_to_do, int poll);
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static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
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int poll);
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static int sbmac_initctx(struct sbmac_softc *s);
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static void sbmac_channel_start(struct sbmac_softc *s);
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static void sbmac_channel_stop(struct sbmac_softc *s);
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static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *,
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enum sbmac_state);
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static void sbmac_promiscuous_mode(struct sbmac_softc *sc, int onoff);
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static uint64_t sbmac_addr2reg(unsigned char *ptr);
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static irqreturn_t sbmac_intr(int irq, void *dev_instance);
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static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev);
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static void sbmac_setmulti(struct sbmac_softc *sc);
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static int sbmac_init(struct platform_device *pldev, long long base);
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static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed);
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static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
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enum sbmac_fc fc);
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static int sbmac_open(struct net_device *dev);
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static void sbmac_tx_timeout (struct net_device *dev);
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static void sbmac_set_rx_mode(struct net_device *dev);
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static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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static int sbmac_close(struct net_device *dev);
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static int sbmac_poll(struct napi_struct *napi, int budget);
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static void sbmac_mii_poll(struct net_device *dev);
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static int sbmac_mii_probe(struct net_device *dev);
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static void sbmac_mii_sync(void __iomem *sbm_mdio);
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static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
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int bitcnt);
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static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx);
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static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
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u16 val);
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/**********************************************************************
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* Globals
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********************************************************************* */
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static char sbmac_string[] = "sb1250-mac";
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static char sbmac_pretty[] = "SB1250 MAC";
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static char sbmac_mdio_string[] = "sb1250-mac-mdio";
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/**********************************************************************
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* MDIO constants
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********************************************************************* */
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#define MII_COMMAND_START 0x01
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#define MII_COMMAND_READ 0x02
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#define MII_COMMAND_WRITE 0x01
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#define MII_COMMAND_ACK 0x02
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#define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */
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#define ENABLE 1
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#define DISABLE 0
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/**********************************************************************
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* SBMAC_MII_SYNC(sbm_mdio)
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*
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* Synchronize with the MII - send a pattern of bits to the MII
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* that will guarantee that it is ready to accept a command.
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*
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* Input parameters:
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* sbm_mdio - address of the MAC's MDIO register
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*
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* Return value:
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* nothing
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********************************************************************* */
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static void sbmac_mii_sync(void __iomem *sbm_mdio)
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{
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int cnt;
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uint64_t bits;
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int mac_mdio_genc;
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mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
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bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
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__raw_writeq(bits | mac_mdio_genc, sbm_mdio);
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for (cnt = 0; cnt < 32; cnt++) {
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__raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
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__raw_writeq(bits | mac_mdio_genc, sbm_mdio);
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}
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}
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/**********************************************************************
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* SBMAC_MII_SENDDATA(sbm_mdio, data, bitcnt)
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*
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* Send some bits to the MII. The bits to be sent are right-
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* justified in the 'data' parameter.
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*
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* Input parameters:
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* sbm_mdio - address of the MAC's MDIO register
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* data - data to send
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* bitcnt - number of bits to send
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********************************************************************* */
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static void sbmac_mii_senddata(void __iomem *sbm_mdio, unsigned int data,
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int bitcnt)
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{
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int i;
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uint64_t bits;
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unsigned int curmask;
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int mac_mdio_genc;
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mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
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bits = M_MAC_MDIO_DIR_OUTPUT;
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__raw_writeq(bits | mac_mdio_genc, sbm_mdio);
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curmask = 1 << (bitcnt - 1);
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for (i = 0; i < bitcnt; i++) {
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if (data & curmask)
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bits |= M_MAC_MDIO_OUT;
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else bits &= ~M_MAC_MDIO_OUT;
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__raw_writeq(bits | mac_mdio_genc, sbm_mdio);
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__raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, sbm_mdio);
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__raw_writeq(bits | mac_mdio_genc, sbm_mdio);
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curmask >>= 1;
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}
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}
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/**********************************************************************
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* SBMAC_MII_READ(bus, phyaddr, regidx)
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* Read a PHY register.
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*
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* Input parameters:
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* bus - MDIO bus handle
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* phyaddr - PHY's address
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* regnum - index of register to read
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*
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* Return value:
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* value read, or 0xffff if an error occurred.
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********************************************************************* */
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static int sbmac_mii_read(struct mii_bus *bus, int phyaddr, int regidx)
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{
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struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
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void __iomem *sbm_mdio = sc->sbm_mdio;
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int idx;
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int error;
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int regval;
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int mac_mdio_genc;
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/*
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* Synchronize ourselves so that the PHY knows the next
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* thing coming down is a command
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*/
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sbmac_mii_sync(sbm_mdio);
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/*
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* Send the data to the PHY. The sequence is
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* a "start" command (2 bits)
|
|
* a "read" command (2 bits)
|
|
* the PHY addr (5 bits)
|
|
* the register index (5 bits)
|
|
*/
|
|
sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
|
|
sbmac_mii_senddata(sbm_mdio, MII_COMMAND_READ, 2);
|
|
sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
|
|
sbmac_mii_senddata(sbm_mdio, regidx, 5);
|
|
|
|
mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
|
|
|
|
/*
|
|
* Switch the port around without a clock transition.
|
|
*/
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
|
|
|
|
/*
|
|
* Send out a clock pulse to signal we want the status
|
|
*/
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
|
|
sbm_mdio);
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
|
|
|
|
/*
|
|
* If an error occurred, the PHY will signal '1' back
|
|
*/
|
|
error = __raw_readq(sbm_mdio) & M_MAC_MDIO_IN;
|
|
|
|
/*
|
|
* Issue an 'idle' clock pulse, but keep the direction
|
|
* the same.
|
|
*/
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
|
|
sbm_mdio);
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
|
|
|
|
regval = 0;
|
|
|
|
for (idx = 0; idx < 16; idx++) {
|
|
regval <<= 1;
|
|
|
|
if (error == 0) {
|
|
if (__raw_readq(sbm_mdio) & M_MAC_MDIO_IN)
|
|
regval |= 1;
|
|
}
|
|
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc,
|
|
sbm_mdio);
|
|
__raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, sbm_mdio);
|
|
}
|
|
|
|
/* Switch back to output */
|
|
__raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
|
|
|
|
if (error == 0)
|
|
return regval;
|
|
return 0xffff;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_MII_WRITE(bus, phyaddr, regidx, regval)
|
|
*
|
|
* Write a value to a PHY register.
|
|
*
|
|
* Input parameters:
|
|
* bus - MDIO bus handle
|
|
* phyaddr - PHY to use
|
|
* regidx - register within the PHY
|
|
* regval - data to write to register
|
|
*
|
|
* Return value:
|
|
* 0 for success
|
|
********************************************************************* */
|
|
|
|
static int sbmac_mii_write(struct mii_bus *bus, int phyaddr, int regidx,
|
|
u16 regval)
|
|
{
|
|
struct sbmac_softc *sc = (struct sbmac_softc *)bus->priv;
|
|
void __iomem *sbm_mdio = sc->sbm_mdio;
|
|
int mac_mdio_genc;
|
|
|
|
sbmac_mii_sync(sbm_mdio);
|
|
|
|
sbmac_mii_senddata(sbm_mdio, MII_COMMAND_START, 2);
|
|
sbmac_mii_senddata(sbm_mdio, MII_COMMAND_WRITE, 2);
|
|
sbmac_mii_senddata(sbm_mdio, phyaddr, 5);
|
|
sbmac_mii_senddata(sbm_mdio, regidx, 5);
|
|
sbmac_mii_senddata(sbm_mdio, MII_COMMAND_ACK, 2);
|
|
sbmac_mii_senddata(sbm_mdio, regval, 16);
|
|
|
|
mac_mdio_genc = __raw_readq(sbm_mdio) & M_MAC_GENC;
|
|
|
|
__raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, sbm_mdio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* SBDMA_INITCTX(d,s,chan,txrx,maxdescr)
|
|
*
|
|
* Initialize a DMA channel context. Since there are potentially
|
|
* eight DMA channels per MAC, it's nice to do this in a standard
|
|
* way.
|
|
*
|
|
* Input parameters:
|
|
* d - struct sbmacdma (DMA channel context)
|
|
* s - struct sbmac_softc (pointer to a MAC)
|
|
* chan - channel number (0..1 right now)
|
|
* txrx - Identifies DMA_TX or DMA_RX for channel direction
|
|
* maxdescr - number of descriptors
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_initctx(struct sbmacdma *d, struct sbmac_softc *s, int chan,
|
|
int txrx, int maxdescr)
|
|
{
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
int int_pktcnt, int_timeout;
|
|
#endif
|
|
|
|
/*
|
|
* Save away interesting stuff in the structure
|
|
*/
|
|
|
|
d->sbdma_eth = s;
|
|
d->sbdma_channel = chan;
|
|
d->sbdma_txdir = txrx;
|
|
|
|
#if 0
|
|
/* RMON clearing */
|
|
s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
|
|
#endif
|
|
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BYTES);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_COLLISIONS);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_LATE_COL);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_EX_COL);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_FCS_ERROR);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_ABORT);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_BAD);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_GOOD);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_RUNT);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_TX_OVERSIZE);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BYTES);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_MCAST);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BCAST);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_BAD);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_GOOD);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_RUNT);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_OVERSIZE);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_FCS_ERROR);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_LENGTH_ERROR);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_CODE_ERROR);
|
|
__raw_writeq(0, s->sbm_base + R_MAC_RMON_RX_ALIGN_ERROR);
|
|
|
|
/*
|
|
* initialize register pointers
|
|
*/
|
|
|
|
d->sbdma_config0 =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0);
|
|
d->sbdma_config1 =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1);
|
|
d->sbdma_dscrbase =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE);
|
|
d->sbdma_dscrcnt =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT);
|
|
d->sbdma_curdscr =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR);
|
|
if (d->sbdma_txdir)
|
|
d->sbdma_oodpktlost = NULL;
|
|
else
|
|
d->sbdma_oodpktlost =
|
|
s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX);
|
|
|
|
/*
|
|
* Allocate memory for the ring
|
|
*/
|
|
|
|
d->sbdma_maxdescr = maxdescr;
|
|
|
|
d->sbdma_dscrtable_unaligned = kcalloc(d->sbdma_maxdescr + 1,
|
|
sizeof(*d->sbdma_dscrtable),
|
|
GFP_KERNEL);
|
|
|
|
/*
|
|
* The descriptor table must be aligned to at least 16 bytes or the
|
|
* MAC will corrupt it.
|
|
*/
|
|
d->sbdma_dscrtable = (struct sbdmadscr *)
|
|
ALIGN((unsigned long)d->sbdma_dscrtable_unaligned,
|
|
sizeof(*d->sbdma_dscrtable));
|
|
|
|
d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
|
|
|
|
d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable);
|
|
|
|
/*
|
|
* And context table
|
|
*/
|
|
|
|
d->sbdma_ctxtable = kcalloc(d->sbdma_maxdescr,
|
|
sizeof(*d->sbdma_ctxtable), GFP_KERNEL);
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
/*
|
|
* Setup Rx/Tx DMA coalescing defaults
|
|
*/
|
|
|
|
int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx;
|
|
if ( int_pktcnt ) {
|
|
d->sbdma_int_pktcnt = int_pktcnt;
|
|
} else {
|
|
d->sbdma_int_pktcnt = 1;
|
|
}
|
|
|
|
int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx;
|
|
if ( int_timeout ) {
|
|
d->sbdma_int_timeout = int_timeout;
|
|
} else {
|
|
d->sbdma_int_timeout = 0;
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBDMA_CHANNEL_START(d)
|
|
*
|
|
* Initialize the hardware registers for a DMA channel.
|
|
*
|
|
* Input parameters:
|
|
* d - DMA channel to init (context must be previously init'd
|
|
* rxtx - DMA_RX or DMA_TX depending on what type of channel
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_channel_start(struct sbmacdma *d, int rxtx)
|
|
{
|
|
/*
|
|
* Turn on the DMA channel
|
|
*/
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
__raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
|
|
0, d->sbdma_config1);
|
|
__raw_writeq(M_DMA_EOP_INT_EN |
|
|
V_DMA_RINGSZ(d->sbdma_maxdescr) |
|
|
V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
|
|
0, d->sbdma_config0);
|
|
#else
|
|
__raw_writeq(0, d->sbdma_config1);
|
|
__raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) |
|
|
0, d->sbdma_config0);
|
|
#endif
|
|
|
|
__raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase);
|
|
|
|
/*
|
|
* Initialize ring pointers
|
|
*/
|
|
|
|
d->sbdma_addptr = d->sbdma_dscrtable;
|
|
d->sbdma_remptr = d->sbdma_dscrtable;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBDMA_CHANNEL_STOP(d)
|
|
*
|
|
* Initialize the hardware registers for a DMA channel.
|
|
*
|
|
* Input parameters:
|
|
* d - DMA channel to init (context must be previously init'd
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_channel_stop(struct sbmacdma *d)
|
|
{
|
|
/*
|
|
* Turn off the DMA channel
|
|
*/
|
|
|
|
__raw_writeq(0, d->sbdma_config1);
|
|
|
|
__raw_writeq(0, d->sbdma_dscrbase);
|
|
|
|
__raw_writeq(0, d->sbdma_config0);
|
|
|
|
/*
|
|
* Zero ring pointers
|
|
*/
|
|
|
|
d->sbdma_addptr = NULL;
|
|
d->sbdma_remptr = NULL;
|
|
}
|
|
|
|
static inline void sbdma_align_skb(struct sk_buff *skb,
|
|
unsigned int power2, unsigned int offset)
|
|
{
|
|
unsigned char *addr = skb->data;
|
|
unsigned char *newaddr = PTR_ALIGN(addr, power2);
|
|
|
|
skb_reserve(skb, newaddr - addr + offset);
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBDMA_ADD_RCVBUFFER(d,sb)
|
|
*
|
|
* Add a buffer to the specified DMA channel. For receive channels,
|
|
* this queues a buffer for inbound packets.
|
|
*
|
|
* Input parameters:
|
|
* sc - softc structure
|
|
* d - DMA channel descriptor
|
|
* sb - sk_buff to add, or NULL if we should allocate one
|
|
*
|
|
* Return value:
|
|
* 0 if buffer could not be added (ring is full)
|
|
* 1 if buffer added successfully
|
|
********************************************************************* */
|
|
|
|
|
|
static int sbdma_add_rcvbuffer(struct sbmac_softc *sc, struct sbmacdma *d,
|
|
struct sk_buff *sb)
|
|
{
|
|
struct net_device *dev = sc->sbm_dev;
|
|
struct sbdmadscr *dsc;
|
|
struct sbdmadscr *nextdsc;
|
|
struct sk_buff *sb_new = NULL;
|
|
int pktsize = ENET_PACKET_SIZE;
|
|
|
|
/* get pointer to our current place in the ring */
|
|
|
|
dsc = d->sbdma_addptr;
|
|
nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
|
|
|
|
/*
|
|
* figure out if the ring is full - if the next descriptor
|
|
* is the same as the one that we're going to remove from
|
|
* the ring, the ring is full
|
|
*/
|
|
|
|
if (nextdsc == d->sbdma_remptr) {
|
|
return -ENOSPC;
|
|
}
|
|
|
|
/*
|
|
* Allocate a sk_buff if we don't already have one.
|
|
* If we do have an sk_buff, reset it so that it's empty.
|
|
*
|
|
* Note: sk_buffs don't seem to be guaranteed to have any sort
|
|
* of alignment when they are allocated. Therefore, allocate enough
|
|
* extra space to make sure that:
|
|
*
|
|
* 1. the data does not start in the middle of a cache line.
|
|
* 2. The data does not end in the middle of a cache line
|
|
* 3. The buffer can be aligned such that the IP addresses are
|
|
* naturally aligned.
|
|
*
|
|
* Remember, the SOCs MAC writes whole cache lines at a time,
|
|
* without reading the old contents first. So, if the sk_buff's
|
|
* data portion starts in the middle of a cache line, the SOC
|
|
* DMA will trash the beginning (and ending) portions.
|
|
*/
|
|
|
|
if (sb == NULL) {
|
|
sb_new = netdev_alloc_skb(dev, ENET_PACKET_SIZE +
|
|
SMP_CACHE_BYTES * 2 +
|
|
NET_IP_ALIGN);
|
|
if (sb_new == NULL) {
|
|
pr_info("%s: sk_buff allocation failed\n",
|
|
d->sbdma_eth->sbm_dev->name);
|
|
return -ENOBUFS;
|
|
}
|
|
|
|
sbdma_align_skb(sb_new, SMP_CACHE_BYTES, NET_IP_ALIGN);
|
|
}
|
|
else {
|
|
sb_new = sb;
|
|
/*
|
|
* nothing special to reinit buffer, it's already aligned
|
|
* and sb->data already points to a good place.
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* fill in the descriptor
|
|
*/
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
/*
|
|
* Do not interrupt per DMA transfer.
|
|
*/
|
|
dsc->dscr_a = virt_to_phys(sb_new->data) |
|
|
V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) | 0;
|
|
#else
|
|
dsc->dscr_a = virt_to_phys(sb_new->data) |
|
|
V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize + NET_IP_ALIGN)) |
|
|
M_DMA_DSCRA_INTERRUPT;
|
|
#endif
|
|
|
|
/* receiving: no options */
|
|
dsc->dscr_b = 0;
|
|
|
|
/*
|
|
* fill in the context
|
|
*/
|
|
|
|
d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new;
|
|
|
|
/*
|
|
* point at next packet
|
|
*/
|
|
|
|
d->sbdma_addptr = nextdsc;
|
|
|
|
/*
|
|
* Give the buffer to the DMA engine.
|
|
*/
|
|
|
|
__raw_writeq(1, d->sbdma_dscrcnt);
|
|
|
|
return 0; /* we did it */
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBDMA_ADD_TXBUFFER(d,sb)
|
|
*
|
|
* Add a transmit buffer to the specified DMA channel, causing a
|
|
* transmit to start.
|
|
*
|
|
* Input parameters:
|
|
* d - DMA channel descriptor
|
|
* sb - sk_buff to add
|
|
*
|
|
* Return value:
|
|
* 0 transmit queued successfully
|
|
* otherwise error code
|
|
********************************************************************* */
|
|
|
|
|
|
static int sbdma_add_txbuffer(struct sbmacdma *d, struct sk_buff *sb)
|
|
{
|
|
struct sbdmadscr *dsc;
|
|
struct sbdmadscr *nextdsc;
|
|
uint64_t phys;
|
|
uint64_t ncb;
|
|
int length;
|
|
|
|
/* get pointer to our current place in the ring */
|
|
|
|
dsc = d->sbdma_addptr;
|
|
nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
|
|
|
|
/*
|
|
* figure out if the ring is full - if the next descriptor
|
|
* is the same as the one that we're going to remove from
|
|
* the ring, the ring is full
|
|
*/
|
|
|
|
if (nextdsc == d->sbdma_remptr) {
|
|
return -ENOSPC;
|
|
}
|
|
|
|
/*
|
|
* Under Linux, it's not necessary to copy/coalesce buffers
|
|
* like it is on NetBSD. We think they're all contiguous,
|
|
* but that may not be true for GBE.
|
|
*/
|
|
|
|
length = sb->len;
|
|
|
|
/*
|
|
* fill in the descriptor. Note that the number of cache
|
|
* blocks in the descriptor is the number of blocks
|
|
* *spanned*, so we need to add in the offset (if any)
|
|
* while doing the calculation.
|
|
*/
|
|
|
|
phys = virt_to_phys(sb->data);
|
|
ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1)));
|
|
|
|
dsc->dscr_a = phys |
|
|
V_DMA_DSCRA_A_SIZE(ncb) |
|
|
#ifndef CONFIG_SBMAC_COALESCE
|
|
M_DMA_DSCRA_INTERRUPT |
|
|
#endif
|
|
M_DMA_ETHTX_SOP;
|
|
|
|
/* transmitting: set outbound options and length */
|
|
|
|
dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) |
|
|
V_DMA_DSCRB_PKT_SIZE(length);
|
|
|
|
/*
|
|
* fill in the context
|
|
*/
|
|
|
|
d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb;
|
|
|
|
/*
|
|
* point at next packet
|
|
*/
|
|
|
|
d->sbdma_addptr = nextdsc;
|
|
|
|
/*
|
|
* Give the buffer to the DMA engine.
|
|
*/
|
|
|
|
__raw_writeq(1, d->sbdma_dscrcnt);
|
|
|
|
return 0; /* we did it */
|
|
}
|
|
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* SBDMA_EMPTYRING(d)
|
|
*
|
|
* Free all allocated sk_buffs on the specified DMA channel;
|
|
*
|
|
* Input parameters:
|
|
* d - DMA channel
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_emptyring(struct sbmacdma *d)
|
|
{
|
|
int idx;
|
|
struct sk_buff *sb;
|
|
|
|
for (idx = 0; idx < d->sbdma_maxdescr; idx++) {
|
|
sb = d->sbdma_ctxtable[idx];
|
|
if (sb) {
|
|
dev_kfree_skb(sb);
|
|
d->sbdma_ctxtable[idx] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBDMA_FILLRING(d)
|
|
*
|
|
* Fill the specified DMA channel (must be receive channel)
|
|
* with sk_buffs
|
|
*
|
|
* Input parameters:
|
|
* sc - softc structure
|
|
* d - DMA channel
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_fillring(struct sbmac_softc *sc, struct sbmacdma *d)
|
|
{
|
|
int idx;
|
|
|
|
for (idx = 0; idx < SBMAC_MAX_RXDESCR - 1; idx++) {
|
|
if (sbdma_add_rcvbuffer(sc, d, NULL) != 0)
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void sbmac_netpoll(struct net_device *netdev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(netdev);
|
|
int irq = sc->sbm_dev->irq;
|
|
|
|
__raw_writeq(0, sc->sbm_imr);
|
|
|
|
sbmac_intr(irq, netdev);
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
__raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
|
|
((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
|
|
sc->sbm_imr);
|
|
#else
|
|
__raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
|
|
(M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
/**********************************************************************
|
|
* SBDMA_RX_PROCESS(sc,d,work_to_do,poll)
|
|
*
|
|
* Process "completed" receive buffers on the specified DMA channel.
|
|
*
|
|
* Input parameters:
|
|
* sc - softc structure
|
|
* d - DMA channel context
|
|
* work_to_do - no. of packets to process before enabling interrupt
|
|
* again (for NAPI)
|
|
* poll - 1: using polling (for NAPI)
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static int sbdma_rx_process(struct sbmac_softc *sc, struct sbmacdma *d,
|
|
int work_to_do, int poll)
|
|
{
|
|
struct net_device *dev = sc->sbm_dev;
|
|
int curidx;
|
|
int hwidx;
|
|
struct sbdmadscr *dsc;
|
|
struct sk_buff *sb;
|
|
int len;
|
|
int work_done = 0;
|
|
int dropped = 0;
|
|
|
|
prefetch(d);
|
|
|
|
again:
|
|
/* Check if the HW dropped any frames */
|
|
dev->stats.rx_fifo_errors
|
|
+= __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff;
|
|
__raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost);
|
|
|
|
while (work_to_do-- > 0) {
|
|
/*
|
|
* figure out where we are (as an index) and where
|
|
* the hardware is (also as an index)
|
|
*
|
|
* This could be done faster if (for example) the
|
|
* descriptor table was page-aligned and contiguous in
|
|
* both virtual and physical memory -- you could then
|
|
* just compare the low-order bits of the virtual address
|
|
* (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
|
|
*/
|
|
|
|
dsc = d->sbdma_remptr;
|
|
curidx = dsc - d->sbdma_dscrtable;
|
|
|
|
prefetch(dsc);
|
|
prefetch(&d->sbdma_ctxtable[curidx]);
|
|
|
|
hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
|
|
d->sbdma_dscrtable_phys) /
|
|
sizeof(*d->sbdma_dscrtable);
|
|
|
|
/*
|
|
* If they're the same, that means we've processed all
|
|
* of the descriptors up to (but not including) the one that
|
|
* the hardware is working on right now.
|
|
*/
|
|
|
|
if (curidx == hwidx)
|
|
goto done;
|
|
|
|
/*
|
|
* Otherwise, get the packet's sk_buff ptr back
|
|
*/
|
|
|
|
sb = d->sbdma_ctxtable[curidx];
|
|
d->sbdma_ctxtable[curidx] = NULL;
|
|
|
|
len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4;
|
|
|
|
/*
|
|
* Check packet status. If good, process it.
|
|
* If not, silently drop it and put it back on the
|
|
* receive ring.
|
|
*/
|
|
|
|
if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) {
|
|
|
|
/*
|
|
* Add a new buffer to replace the old one. If we fail
|
|
* to allocate a buffer, we're going to drop this
|
|
* packet and put it right back on the receive ring.
|
|
*/
|
|
|
|
if (unlikely(sbdma_add_rcvbuffer(sc, d, NULL) ==
|
|
-ENOBUFS)) {
|
|
dev->stats.rx_dropped++;
|
|
/* Re-add old buffer */
|
|
sbdma_add_rcvbuffer(sc, d, sb);
|
|
/* No point in continuing at the moment */
|
|
printk(KERN_ERR "dropped packet (1)\n");
|
|
d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
|
|
goto done;
|
|
} else {
|
|
/*
|
|
* Set length into the packet
|
|
*/
|
|
skb_put(sb,len);
|
|
|
|
/*
|
|
* Buffer has been replaced on the
|
|
* receive ring. Pass the buffer to
|
|
* the kernel
|
|
*/
|
|
sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
|
|
/* Check hw IPv4/TCP checksum if supported */
|
|
if (sc->rx_hw_checksum == ENABLE) {
|
|
if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) &&
|
|
!((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) {
|
|
sb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
/* don't need to set sb->csum */
|
|
} else {
|
|
sb->ip_summed = CHECKSUM_NONE;
|
|
}
|
|
}
|
|
prefetch(sb->data);
|
|
prefetch((const void *)(((char *)sb->data)+32));
|
|
if (poll)
|
|
dropped = netif_receive_skb(sb);
|
|
else
|
|
dropped = netif_rx(sb);
|
|
|
|
if (dropped == NET_RX_DROP) {
|
|
dev->stats.rx_dropped++;
|
|
d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
|
|
goto done;
|
|
}
|
|
else {
|
|
dev->stats.rx_bytes += len;
|
|
dev->stats.rx_packets++;
|
|
}
|
|
}
|
|
} else {
|
|
/*
|
|
* Packet was mangled somehow. Just drop it and
|
|
* put it back on the receive ring.
|
|
*/
|
|
dev->stats.rx_errors++;
|
|
sbdma_add_rcvbuffer(sc, d, sb);
|
|
}
|
|
|
|
|
|
/*
|
|
* .. and advance to the next buffer.
|
|
*/
|
|
|
|
d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
|
|
work_done++;
|
|
}
|
|
if (!poll) {
|
|
work_to_do = 32;
|
|
goto again; /* collect fifo drop statistics again */
|
|
}
|
|
done:
|
|
return work_done;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBDMA_TX_PROCESS(sc,d)
|
|
*
|
|
* Process "completed" transmit buffers on the specified DMA channel.
|
|
* This is normally called within the interrupt service routine.
|
|
* Note that this isn't really ideal for priority channels, since
|
|
* it processes all of the packets on a given channel before
|
|
* returning.
|
|
*
|
|
* Input parameters:
|
|
* sc - softc structure
|
|
* d - DMA channel context
|
|
* poll - 1: using polling (for NAPI)
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbdma_tx_process(struct sbmac_softc *sc, struct sbmacdma *d,
|
|
int poll)
|
|
{
|
|
struct net_device *dev = sc->sbm_dev;
|
|
int curidx;
|
|
int hwidx;
|
|
struct sbdmadscr *dsc;
|
|
struct sk_buff *sb;
|
|
unsigned long flags;
|
|
int packets_handled = 0;
|
|
|
|
spin_lock_irqsave(&(sc->sbm_lock), flags);
|
|
|
|
if (d->sbdma_remptr == d->sbdma_addptr)
|
|
goto end_unlock;
|
|
|
|
hwidx = ((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
|
|
d->sbdma_dscrtable_phys) / sizeof(*d->sbdma_dscrtable);
|
|
|
|
for (;;) {
|
|
/*
|
|
* figure out where we are (as an index) and where
|
|
* the hardware is (also as an index)
|
|
*
|
|
* This could be done faster if (for example) the
|
|
* descriptor table was page-aligned and contiguous in
|
|
* both virtual and physical memory -- you could then
|
|
* just compare the low-order bits of the virtual address
|
|
* (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
|
|
*/
|
|
|
|
curidx = d->sbdma_remptr - d->sbdma_dscrtable;
|
|
|
|
/*
|
|
* If they're the same, that means we've processed all
|
|
* of the descriptors up to (but not including) the one that
|
|
* the hardware is working on right now.
|
|
*/
|
|
|
|
if (curidx == hwidx)
|
|
break;
|
|
|
|
/*
|
|
* Otherwise, get the packet's sk_buff ptr back
|
|
*/
|
|
|
|
dsc = &(d->sbdma_dscrtable[curidx]);
|
|
sb = d->sbdma_ctxtable[curidx];
|
|
d->sbdma_ctxtable[curidx] = NULL;
|
|
|
|
/*
|
|
* Stats
|
|
*/
|
|
|
|
dev->stats.tx_bytes += sb->len;
|
|
dev->stats.tx_packets++;
|
|
|
|
/*
|
|
* for transmits, we just free buffers.
|
|
*/
|
|
|
|
dev_kfree_skb_irq(sb);
|
|
|
|
/*
|
|
* .. and advance to the next buffer.
|
|
*/
|
|
|
|
d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
|
|
|
|
packets_handled++;
|
|
|
|
}
|
|
|
|
/*
|
|
* Decide if we should wake up the protocol or not.
|
|
* Other drivers seem to do this when we reach a low
|
|
* watermark on the transmit queue.
|
|
*/
|
|
|
|
if (packets_handled)
|
|
netif_wake_queue(d->sbdma_eth->sbm_dev);
|
|
|
|
end_unlock:
|
|
spin_unlock_irqrestore(&(sc->sbm_lock), flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_INITCTX(s)
|
|
*
|
|
* Initialize an Ethernet context structure - this is called
|
|
* once per MAC on the 1250. Memory is allocated here, so don't
|
|
* call it again from inside the ioctl routines that bring the
|
|
* interface up/down
|
|
*
|
|
* Input parameters:
|
|
* s - sbmac context structure
|
|
*
|
|
* Return value:
|
|
* 0
|
|
********************************************************************* */
|
|
|
|
static int sbmac_initctx(struct sbmac_softc *s)
|
|
{
|
|
|
|
/*
|
|
* figure out the addresses of some ports
|
|
*/
|
|
|
|
s->sbm_macenable = s->sbm_base + R_MAC_ENABLE;
|
|
s->sbm_maccfg = s->sbm_base + R_MAC_CFG;
|
|
s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG;
|
|
s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG;
|
|
s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG;
|
|
s->sbm_isr = s->sbm_base + R_MAC_STATUS;
|
|
s->sbm_imr = s->sbm_base + R_MAC_INT_MASK;
|
|
s->sbm_mdio = s->sbm_base + R_MAC_MDIO;
|
|
|
|
/*
|
|
* Initialize the DMA channels. Right now, only one per MAC is used
|
|
* Note: Only do this _once_, as it allocates memory from the kernel!
|
|
*/
|
|
|
|
sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR);
|
|
sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR);
|
|
|
|
/*
|
|
* initial state is OFF
|
|
*/
|
|
|
|
s->sbm_state = sbmac_state_off;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void sbdma_uninitctx(struct sbmacdma *d)
|
|
{
|
|
if (d->sbdma_dscrtable_unaligned) {
|
|
kfree(d->sbdma_dscrtable_unaligned);
|
|
d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL;
|
|
}
|
|
|
|
if (d->sbdma_ctxtable) {
|
|
kfree(d->sbdma_ctxtable);
|
|
d->sbdma_ctxtable = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
static void sbmac_uninitctx(struct sbmac_softc *sc)
|
|
{
|
|
sbdma_uninitctx(&(sc->sbm_txdma));
|
|
sbdma_uninitctx(&(sc->sbm_rxdma));
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_CHANNEL_START(s)
|
|
*
|
|
* Start packet processing on this MAC.
|
|
*
|
|
* Input parameters:
|
|
* s - sbmac structure
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbmac_channel_start(struct sbmac_softc *s)
|
|
{
|
|
uint64_t reg;
|
|
void __iomem *port;
|
|
uint64_t cfg,fifo,framecfg;
|
|
int idx, th_value;
|
|
|
|
/*
|
|
* Don't do this if running
|
|
*/
|
|
|
|
if (s->sbm_state == sbmac_state_on)
|
|
return;
|
|
|
|
/*
|
|
* Bring the controller out of reset, but leave it off.
|
|
*/
|
|
|
|
__raw_writeq(0, s->sbm_macenable);
|
|
|
|
/*
|
|
* Ignore all received packets
|
|
*/
|
|
|
|
__raw_writeq(0, s->sbm_rxfilter);
|
|
|
|
/*
|
|
* Calculate values for various control registers.
|
|
*/
|
|
|
|
cfg = M_MAC_RETRY_EN |
|
|
M_MAC_TX_HOLD_SOP_EN |
|
|
V_MAC_TX_PAUSE_CNT_16K |
|
|
M_MAC_AP_STAT_EN |
|
|
M_MAC_FAST_SYNC |
|
|
M_MAC_SS_EN |
|
|
0;
|
|
|
|
/*
|
|
* Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars
|
|
* and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above
|
|
* Use a larger RD_THRSH for gigabit
|
|
*/
|
|
if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2)
|
|
th_value = 28;
|
|
else
|
|
th_value = 64;
|
|
|
|
fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */
|
|
((s->sbm_speed == sbmac_speed_1000)
|
|
? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) |
|
|
V_MAC_TX_RL_THRSH(4) |
|
|
V_MAC_RX_PL_THRSH(4) |
|
|
V_MAC_RX_RD_THRSH(4) | /* Must be '4' */
|
|
V_MAC_RX_RL_THRSH(8) |
|
|
0;
|
|
|
|
framecfg = V_MAC_MIN_FRAMESZ_DEFAULT |
|
|
V_MAC_MAX_FRAMESZ_DEFAULT |
|
|
V_MAC_BACKOFF_SEL(1);
|
|
|
|
/*
|
|
* Clear out the hash address map
|
|
*/
|
|
|
|
port = s->sbm_base + R_MAC_HASH_BASE;
|
|
for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
|
|
__raw_writeq(0, port);
|
|
port += sizeof(uint64_t);
|
|
}
|
|
|
|
/*
|
|
* Clear out the exact-match table
|
|
*/
|
|
|
|
port = s->sbm_base + R_MAC_ADDR_BASE;
|
|
for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
|
|
__raw_writeq(0, port);
|
|
port += sizeof(uint64_t);
|
|
}
|
|
|
|
/*
|
|
* Clear out the DMA Channel mapping table registers
|
|
*/
|
|
|
|
port = s->sbm_base + R_MAC_CHUP0_BASE;
|
|
for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
|
|
__raw_writeq(0, port);
|
|
port += sizeof(uint64_t);
|
|
}
|
|
|
|
|
|
port = s->sbm_base + R_MAC_CHLO0_BASE;
|
|
for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
|
|
__raw_writeq(0, port);
|
|
port += sizeof(uint64_t);
|
|
}
|
|
|
|
/*
|
|
* Program the hardware address. It goes into the hardware-address
|
|
* register as well as the first filter register.
|
|
*/
|
|
|
|
reg = sbmac_addr2reg(s->sbm_hwaddr);
|
|
|
|
port = s->sbm_base + R_MAC_ADDR_BASE;
|
|
__raw_writeq(reg, port);
|
|
port = s->sbm_base + R_MAC_ETHERNET_ADDR;
|
|
|
|
#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
|
|
/*
|
|
* Pass1 SOCs do not receive packets addressed to the
|
|
* destination address in the R_MAC_ETHERNET_ADDR register.
|
|
* Set the value to zero.
|
|
*/
|
|
__raw_writeq(0, port);
|
|
#else
|
|
__raw_writeq(reg, port);
|
|
#endif
|
|
|
|
/*
|
|
* Set the receive filter for no packets, and write values
|
|
* to the various config registers
|
|
*/
|
|
|
|
__raw_writeq(0, s->sbm_rxfilter);
|
|
__raw_writeq(0, s->sbm_imr);
|
|
__raw_writeq(framecfg, s->sbm_framecfg);
|
|
__raw_writeq(fifo, s->sbm_fifocfg);
|
|
__raw_writeq(cfg, s->sbm_maccfg);
|
|
|
|
/*
|
|
* Initialize DMA channels (rings should be ok now)
|
|
*/
|
|
|
|
sbdma_channel_start(&(s->sbm_rxdma), DMA_RX);
|
|
sbdma_channel_start(&(s->sbm_txdma), DMA_TX);
|
|
|
|
/*
|
|
* Configure the speed, duplex, and flow control
|
|
*/
|
|
|
|
sbmac_set_speed(s,s->sbm_speed);
|
|
sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc);
|
|
|
|
/*
|
|
* Fill the receive ring
|
|
*/
|
|
|
|
sbdma_fillring(s, &(s->sbm_rxdma));
|
|
|
|
/*
|
|
* Turn on the rest of the bits in the enable register
|
|
*/
|
|
|
|
#if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
|
|
__raw_writeq(M_MAC_RXDMA_EN0 |
|
|
M_MAC_TXDMA_EN0, s->sbm_macenable);
|
|
#elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
|
|
__raw_writeq(M_MAC_RXDMA_EN0 |
|
|
M_MAC_TXDMA_EN0 |
|
|
M_MAC_RX_ENABLE |
|
|
M_MAC_TX_ENABLE, s->sbm_macenable);
|
|
#else
|
|
#error invalid SiByte MAC configuation
|
|
#endif
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
__raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
|
|
((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr);
|
|
#else
|
|
__raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
|
|
(M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr);
|
|
#endif
|
|
|
|
/*
|
|
* Enable receiving unicasts and broadcasts
|
|
*/
|
|
|
|
__raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter);
|
|
|
|
/*
|
|
* we're running now.
|
|
*/
|
|
|
|
s->sbm_state = sbmac_state_on;
|
|
|
|
/*
|
|
* Program multicast addresses
|
|
*/
|
|
|
|
sbmac_setmulti(s);
|
|
|
|
/*
|
|
* If channel was in promiscuous mode before, turn that on
|
|
*/
|
|
|
|
if (s->sbm_devflags & IFF_PROMISC) {
|
|
sbmac_promiscuous_mode(s,1);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_CHANNEL_STOP(s)
|
|
*
|
|
* Stop packet processing on this MAC.
|
|
*
|
|
* Input parameters:
|
|
* s - sbmac structure
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbmac_channel_stop(struct sbmac_softc *s)
|
|
{
|
|
/* don't do this if already stopped */
|
|
|
|
if (s->sbm_state == sbmac_state_off)
|
|
return;
|
|
|
|
/* don't accept any packets, disable all interrupts */
|
|
|
|
__raw_writeq(0, s->sbm_rxfilter);
|
|
__raw_writeq(0, s->sbm_imr);
|
|
|
|
/* Turn off ticker */
|
|
|
|
/* XXX */
|
|
|
|
/* turn off receiver and transmitter */
|
|
|
|
__raw_writeq(0, s->sbm_macenable);
|
|
|
|
/* We're stopped now. */
|
|
|
|
s->sbm_state = sbmac_state_off;
|
|
|
|
/*
|
|
* Stop DMA channels (rings should be ok now)
|
|
*/
|
|
|
|
sbdma_channel_stop(&(s->sbm_rxdma));
|
|
sbdma_channel_stop(&(s->sbm_txdma));
|
|
|
|
/* Empty the receive and transmit rings */
|
|
|
|
sbdma_emptyring(&(s->sbm_rxdma));
|
|
sbdma_emptyring(&(s->sbm_txdma));
|
|
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_SET_CHANNEL_STATE(state)
|
|
*
|
|
* Set the channel's state ON or OFF
|
|
*
|
|
* Input parameters:
|
|
* state - new state
|
|
*
|
|
* Return value:
|
|
* old state
|
|
********************************************************************* */
|
|
static enum sbmac_state sbmac_set_channel_state(struct sbmac_softc *sc,
|
|
enum sbmac_state state)
|
|
{
|
|
enum sbmac_state oldstate = sc->sbm_state;
|
|
|
|
/*
|
|
* If same as previous state, return
|
|
*/
|
|
|
|
if (state == oldstate) {
|
|
return oldstate;
|
|
}
|
|
|
|
/*
|
|
* If new state is ON, turn channel on
|
|
*/
|
|
|
|
if (state == sbmac_state_on) {
|
|
sbmac_channel_start(sc);
|
|
}
|
|
else {
|
|
sbmac_channel_stop(sc);
|
|
}
|
|
|
|
/*
|
|
* Return previous state
|
|
*/
|
|
|
|
return oldstate;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_PROMISCUOUS_MODE(sc,onoff)
|
|
*
|
|
* Turn on or off promiscuous mode
|
|
*
|
|
* Input parameters:
|
|
* sc - softc
|
|
* onoff - 1 to turn on, 0 to turn off
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff)
|
|
{
|
|
uint64_t reg;
|
|
|
|
if (sc->sbm_state != sbmac_state_on)
|
|
return;
|
|
|
|
if (onoff) {
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg |= M_MAC_ALLPKT_EN;
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
}
|
|
else {
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg &= ~M_MAC_ALLPKT_EN;
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
}
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_SETIPHDR_OFFSET(sc,onoff)
|
|
*
|
|
* Set the iphdr offset as 15 assuming ethernet encapsulation
|
|
*
|
|
* Input parameters:
|
|
* sc - softc
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbmac_set_iphdr_offset(struct sbmac_softc *sc)
|
|
{
|
|
uint64_t reg;
|
|
|
|
/* Hard code the off set to 15 for now */
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15);
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
|
|
/* BCM1250 pass1 didn't have hardware checksum. Everything
|
|
later does. */
|
|
if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) {
|
|
sc->rx_hw_checksum = DISABLE;
|
|
} else {
|
|
sc->rx_hw_checksum = ENABLE;
|
|
}
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_ADDR2REG(ptr)
|
|
*
|
|
* Convert six bytes into the 64-bit register value that
|
|
* we typically write into the SBMAC's address/mcast registers
|
|
*
|
|
* Input parameters:
|
|
* ptr - pointer to 6 bytes
|
|
*
|
|
* Return value:
|
|
* register value
|
|
********************************************************************* */
|
|
|
|
static uint64_t sbmac_addr2reg(unsigned char *ptr)
|
|
{
|
|
uint64_t reg = 0;
|
|
|
|
ptr += 6;
|
|
|
|
reg |= (uint64_t) *(--ptr);
|
|
reg <<= 8;
|
|
reg |= (uint64_t) *(--ptr);
|
|
reg <<= 8;
|
|
reg |= (uint64_t) *(--ptr);
|
|
reg <<= 8;
|
|
reg |= (uint64_t) *(--ptr);
|
|
reg <<= 8;
|
|
reg |= (uint64_t) *(--ptr);
|
|
reg <<= 8;
|
|
reg |= (uint64_t) *(--ptr);
|
|
|
|
return reg;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_SET_SPEED(s,speed)
|
|
*
|
|
* Configure LAN speed for the specified MAC.
|
|
* Warning: must be called when MAC is off!
|
|
*
|
|
* Input parameters:
|
|
* s - sbmac structure
|
|
* speed - speed to set MAC to (see enum sbmac_speed)
|
|
*
|
|
* Return value:
|
|
* 1 if successful
|
|
* 0 indicates invalid parameters
|
|
********************************************************************* */
|
|
|
|
static int sbmac_set_speed(struct sbmac_softc *s, enum sbmac_speed speed)
|
|
{
|
|
uint64_t cfg;
|
|
uint64_t framecfg;
|
|
|
|
/*
|
|
* Save new current values
|
|
*/
|
|
|
|
s->sbm_speed = speed;
|
|
|
|
if (s->sbm_state == sbmac_state_on)
|
|
return 0; /* save for next restart */
|
|
|
|
/*
|
|
* Read current register values
|
|
*/
|
|
|
|
cfg = __raw_readq(s->sbm_maccfg);
|
|
framecfg = __raw_readq(s->sbm_framecfg);
|
|
|
|
/*
|
|
* Mask out the stuff we want to change
|
|
*/
|
|
|
|
cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL);
|
|
framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH |
|
|
M_MAC_SLOT_SIZE);
|
|
|
|
/*
|
|
* Now add in the new bits
|
|
*/
|
|
|
|
switch (speed) {
|
|
case sbmac_speed_10:
|
|
framecfg |= V_MAC_IFG_RX_10 |
|
|
V_MAC_IFG_TX_10 |
|
|
K_MAC_IFG_THRSH_10 |
|
|
V_MAC_SLOT_SIZE_10;
|
|
cfg |= V_MAC_SPEED_SEL_10MBPS;
|
|
break;
|
|
|
|
case sbmac_speed_100:
|
|
framecfg |= V_MAC_IFG_RX_100 |
|
|
V_MAC_IFG_TX_100 |
|
|
V_MAC_IFG_THRSH_100 |
|
|
V_MAC_SLOT_SIZE_100;
|
|
cfg |= V_MAC_SPEED_SEL_100MBPS ;
|
|
break;
|
|
|
|
case sbmac_speed_1000:
|
|
framecfg |= V_MAC_IFG_RX_1000 |
|
|
V_MAC_IFG_TX_1000 |
|
|
V_MAC_IFG_THRSH_1000 |
|
|
V_MAC_SLOT_SIZE_1000;
|
|
cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN;
|
|
break;
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send the bits back to the hardware
|
|
*/
|
|
|
|
__raw_writeq(framecfg, s->sbm_framecfg);
|
|
__raw_writeq(cfg, s->sbm_maccfg);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_SET_DUPLEX(s,duplex,fc)
|
|
*
|
|
* Set Ethernet duplex and flow control options for this MAC
|
|
* Warning: must be called when MAC is off!
|
|
*
|
|
* Input parameters:
|
|
* s - sbmac structure
|
|
* duplex - duplex setting (see enum sbmac_duplex)
|
|
* fc - flow control setting (see enum sbmac_fc)
|
|
*
|
|
* Return value:
|
|
* 1 if ok
|
|
* 0 if an invalid parameter combination was specified
|
|
********************************************************************* */
|
|
|
|
static int sbmac_set_duplex(struct sbmac_softc *s, enum sbmac_duplex duplex,
|
|
enum sbmac_fc fc)
|
|
{
|
|
uint64_t cfg;
|
|
|
|
/*
|
|
* Save new current values
|
|
*/
|
|
|
|
s->sbm_duplex = duplex;
|
|
s->sbm_fc = fc;
|
|
|
|
if (s->sbm_state == sbmac_state_on)
|
|
return 0; /* save for next restart */
|
|
|
|
/*
|
|
* Read current register values
|
|
*/
|
|
|
|
cfg = __raw_readq(s->sbm_maccfg);
|
|
|
|
/*
|
|
* Mask off the stuff we're about to change
|
|
*/
|
|
|
|
cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN);
|
|
|
|
|
|
switch (duplex) {
|
|
case sbmac_duplex_half:
|
|
switch (fc) {
|
|
case sbmac_fc_disabled:
|
|
cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED;
|
|
break;
|
|
|
|
case sbmac_fc_collision:
|
|
cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED;
|
|
break;
|
|
|
|
case sbmac_fc_carrier:
|
|
cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR;
|
|
break;
|
|
|
|
case sbmac_fc_frame: /* not valid in half duplex */
|
|
default: /* invalid selection */
|
|
return 0;
|
|
}
|
|
break;
|
|
|
|
case sbmac_duplex_full:
|
|
switch (fc) {
|
|
case sbmac_fc_disabled:
|
|
cfg |= V_MAC_FC_CMD_DISABLED;
|
|
break;
|
|
|
|
case sbmac_fc_frame:
|
|
cfg |= V_MAC_FC_CMD_ENABLED;
|
|
break;
|
|
|
|
case sbmac_fc_collision: /* not valid in full duplex */
|
|
case sbmac_fc_carrier: /* not valid in full duplex */
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Send the bits back to the hardware
|
|
*/
|
|
|
|
__raw_writeq(cfg, s->sbm_maccfg);
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* SBMAC_INTR()
|
|
*
|
|
* Interrupt handler for MAC interrupts
|
|
*
|
|
* Input parameters:
|
|
* MAC structure
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
static irqreturn_t sbmac_intr(int irq,void *dev_instance)
|
|
{
|
|
struct net_device *dev = (struct net_device *) dev_instance;
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
uint64_t isr;
|
|
int handled = 0;
|
|
|
|
/*
|
|
* Read the ISR (this clears the bits in the real
|
|
* register, except for counter addr)
|
|
*/
|
|
|
|
isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
|
|
|
|
if (isr == 0)
|
|
return IRQ_RETVAL(0);
|
|
handled = 1;
|
|
|
|
/*
|
|
* Transmits on channel 0
|
|
*/
|
|
|
|
if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
|
|
sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
|
|
|
|
if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
|
|
if (napi_schedule_prep(&sc->napi)) {
|
|
__raw_writeq(0, sc->sbm_imr);
|
|
__napi_schedule(&sc->napi);
|
|
/* Depend on the exit from poll to reenable intr */
|
|
}
|
|
else {
|
|
/* may leave some packets behind */
|
|
sbdma_rx_process(sc,&(sc->sbm_rxdma),
|
|
SBMAC_MAX_RXDESCR * 2, 0);
|
|
}
|
|
}
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_START_TX(skb,dev)
|
|
*
|
|
* Start output on the specified interface. Basically, we
|
|
* queue as many buffers as we can until the ring fills up, or
|
|
* we run off the end of the queue, whichever comes first.
|
|
*
|
|
* Input parameters:
|
|
*
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
/* lock eth irq */
|
|
spin_lock_irqsave(&sc->sbm_lock, flags);
|
|
|
|
/*
|
|
* Put the buffer on the transmit ring. If we
|
|
* don't have room, stop the queue.
|
|
*/
|
|
|
|
if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
|
|
/* XXX save skb that we could not send */
|
|
netif_stop_queue(dev);
|
|
spin_unlock_irqrestore(&sc->sbm_lock, flags);
|
|
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
spin_unlock_irqrestore(&sc->sbm_lock, flags);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_SETMULTI(sc)
|
|
*
|
|
* Reprogram the multicast table into the hardware, given
|
|
* the list of multicasts associated with the interface
|
|
* structure.
|
|
*
|
|
* Input parameters:
|
|
* sc - softc
|
|
*
|
|
* Return value:
|
|
* nothing
|
|
********************************************************************* */
|
|
|
|
static void sbmac_setmulti(struct sbmac_softc *sc)
|
|
{
|
|
uint64_t reg;
|
|
void __iomem *port;
|
|
int idx;
|
|
struct dev_mc_list *mclist;
|
|
struct net_device *dev = sc->sbm_dev;
|
|
|
|
/*
|
|
* Clear out entire multicast table. We do this by nuking
|
|
* the entire hash table and all the direct matches except
|
|
* the first one, which is used for our station address
|
|
*/
|
|
|
|
for (idx = 1; idx < MAC_ADDR_COUNT; idx++) {
|
|
port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t));
|
|
__raw_writeq(0, port);
|
|
}
|
|
|
|
for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
|
|
port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t));
|
|
__raw_writeq(0, port);
|
|
}
|
|
|
|
/*
|
|
* Clear the filter to say we don't want any multicasts.
|
|
*/
|
|
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
|
|
if (dev->flags & IFF_ALLMULTI) {
|
|
/*
|
|
* Enable ALL multicasts. Do this by inverting the
|
|
* multicast enable bit.
|
|
*/
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* Progam new multicast entries. For now, only use the
|
|
* perfect filter. In the future we'll need to use the
|
|
* hash filter if the perfect filter overflows
|
|
*/
|
|
|
|
/* XXX only using perfect filter for now, need to use hash
|
|
* XXX if the table overflows */
|
|
|
|
idx = 1; /* skip station address */
|
|
mclist = dev->mc_list;
|
|
while (mclist && (idx < MAC_ADDR_COUNT)) {
|
|
reg = sbmac_addr2reg(mclist->dmi_addr);
|
|
port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t));
|
|
__raw_writeq(reg, port);
|
|
idx++;
|
|
mclist = mclist->next;
|
|
}
|
|
|
|
/*
|
|
* Enable the "accept multicast bits" if we programmed at least one
|
|
* multicast.
|
|
*/
|
|
|
|
if (idx > 1) {
|
|
reg = __raw_readq(sc->sbm_rxfilter);
|
|
reg |= M_MAC_MCAST_EN;
|
|
__raw_writeq(reg, sc->sbm_rxfilter);
|
|
}
|
|
}
|
|
|
|
#if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) || defined(SBMAC_ETH3_HWADDR)
|
|
/**********************************************************************
|
|
* SBMAC_PARSE_XDIGIT(str)
|
|
*
|
|
* Parse a hex digit, returning its value
|
|
*
|
|
* Input parameters:
|
|
* str - character
|
|
*
|
|
* Return value:
|
|
* hex value, or -1 if invalid
|
|
********************************************************************* */
|
|
|
|
static int sbmac_parse_xdigit(char str)
|
|
{
|
|
int digit;
|
|
|
|
if ((str >= '0') && (str <= '9'))
|
|
digit = str - '0';
|
|
else if ((str >= 'a') && (str <= 'f'))
|
|
digit = str - 'a' + 10;
|
|
else if ((str >= 'A') && (str <= 'F'))
|
|
digit = str - 'A' + 10;
|
|
else
|
|
return -1;
|
|
|
|
return digit;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* SBMAC_PARSE_HWADDR(str,hwaddr)
|
|
*
|
|
* Convert a string in the form xx:xx:xx:xx:xx:xx into a 6-byte
|
|
* Ethernet address.
|
|
*
|
|
* Input parameters:
|
|
* str - string
|
|
* hwaddr - pointer to hardware address
|
|
*
|
|
* Return value:
|
|
* 0 if ok, else -1
|
|
********************************************************************* */
|
|
|
|
static int sbmac_parse_hwaddr(char *str, unsigned char *hwaddr)
|
|
{
|
|
int digit1,digit2;
|
|
int idx = 6;
|
|
|
|
while (*str && (idx > 0)) {
|
|
digit1 = sbmac_parse_xdigit(*str);
|
|
if (digit1 < 0)
|
|
return -1;
|
|
str++;
|
|
if (!*str)
|
|
return -1;
|
|
|
|
if ((*str == ':') || (*str == '-')) {
|
|
digit2 = digit1;
|
|
digit1 = 0;
|
|
}
|
|
else {
|
|
digit2 = sbmac_parse_xdigit(*str);
|
|
if (digit2 < 0)
|
|
return -1;
|
|
str++;
|
|
}
|
|
|
|
*hwaddr++ = (digit1 << 4) | digit2;
|
|
idx--;
|
|
|
|
if (*str == '-')
|
|
str++;
|
|
if (*str == ':')
|
|
str++;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int sb1250_change_mtu(struct net_device *_dev, int new_mtu)
|
|
{
|
|
if (new_mtu > ENET_PACKET_SIZE)
|
|
return -EINVAL;
|
|
_dev->mtu = new_mtu;
|
|
pr_info("changing the mtu to %d\n", new_mtu);
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops sbmac_netdev_ops = {
|
|
.ndo_open = sbmac_open,
|
|
.ndo_stop = sbmac_close,
|
|
.ndo_start_xmit = sbmac_start_tx,
|
|
.ndo_set_multicast_list = sbmac_set_rx_mode,
|
|
.ndo_tx_timeout = sbmac_tx_timeout,
|
|
.ndo_do_ioctl = sbmac_mii_ioctl,
|
|
.ndo_change_mtu = sb1250_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = sbmac_netpoll,
|
|
#endif
|
|
};
|
|
|
|
/**********************************************************************
|
|
* SBMAC_INIT(dev)
|
|
*
|
|
* Attach routine - init hardware and hook ourselves into linux
|
|
*
|
|
* Input parameters:
|
|
* dev - net_device structure
|
|
*
|
|
* Return value:
|
|
* status
|
|
********************************************************************* */
|
|
|
|
static int sbmac_init(struct platform_device *pldev, long long base)
|
|
{
|
|
struct net_device *dev = dev_get_drvdata(&pldev->dev);
|
|
int idx = pldev->id;
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
unsigned char *eaddr;
|
|
uint64_t ea_reg;
|
|
int i;
|
|
int err;
|
|
|
|
sc->sbm_dev = dev;
|
|
sc->sbe_idx = idx;
|
|
|
|
eaddr = sc->sbm_hwaddr;
|
|
|
|
/*
|
|
* Read the ethernet address. The firmware left this programmed
|
|
* for us in the ethernet address register for each mac.
|
|
*/
|
|
|
|
ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR);
|
|
__raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR);
|
|
for (i = 0; i < 6; i++) {
|
|
eaddr[i] = (uint8_t) (ea_reg & 0xFF);
|
|
ea_reg >>= 8;
|
|
}
|
|
|
|
for (i = 0; i < 6; i++) {
|
|
dev->dev_addr[i] = eaddr[i];
|
|
}
|
|
|
|
/*
|
|
* Initialize context (get pointers to registers and stuff), then
|
|
* allocate the memory for the descriptor tables.
|
|
*/
|
|
|
|
sbmac_initctx(sc);
|
|
|
|
/*
|
|
* Set up Linux device callins
|
|
*/
|
|
|
|
spin_lock_init(&(sc->sbm_lock));
|
|
|
|
dev->netdev_ops = &sbmac_netdev_ops;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
|
|
|
|
dev->irq = UNIT_INT(idx);
|
|
|
|
/* This is needed for PASS2 for Rx H/W checksum feature */
|
|
sbmac_set_iphdr_offset(sc);
|
|
|
|
sc->mii_bus = mdiobus_alloc();
|
|
if (sc->mii_bus == NULL) {
|
|
sbmac_uninitctx(sc);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
err = register_netdev(dev);
|
|
if (err) {
|
|
printk(KERN_ERR "%s.%d: unable to register netdev\n",
|
|
sbmac_string, idx);
|
|
mdiobus_free(sc->mii_bus);
|
|
sbmac_uninitctx(sc);
|
|
return err;
|
|
}
|
|
|
|
pr_info("%s.%d: registered as %s\n", sbmac_string, idx, dev->name);
|
|
|
|
if (sc->rx_hw_checksum == ENABLE)
|
|
pr_info("%s: enabling TCP rcv checksum\n", dev->name);
|
|
|
|
/*
|
|
* Display Ethernet address (this is called during the config
|
|
* process so we need to finish off the config message that
|
|
* was being displayed)
|
|
*/
|
|
pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %pM\n",
|
|
dev->name, base, eaddr);
|
|
|
|
sc->mii_bus->name = sbmac_mdio_string;
|
|
snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%x", idx);
|
|
sc->mii_bus->priv = sc;
|
|
sc->mii_bus->read = sbmac_mii_read;
|
|
sc->mii_bus->write = sbmac_mii_write;
|
|
sc->mii_bus->irq = sc->phy_irq;
|
|
for (i = 0; i < PHY_MAX_ADDR; ++i)
|
|
sc->mii_bus->irq[i] = SBMAC_PHY_INT;
|
|
|
|
sc->mii_bus->parent = &pldev->dev;
|
|
dev_set_drvdata(&pldev->dev, sc->mii_bus);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int sbmac_open(struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
int err;
|
|
|
|
if (debug > 1)
|
|
pr_debug("%s: sbmac_open() irq %d.\n", dev->name, dev->irq);
|
|
|
|
/*
|
|
* map/route interrupt (clear status first, in case something
|
|
* weird is pending; we haven't initialized the mac registers
|
|
* yet)
|
|
*/
|
|
|
|
__raw_readq(sc->sbm_isr);
|
|
err = request_irq(dev->irq, &sbmac_intr, IRQF_SHARED, dev->name, dev);
|
|
if (err) {
|
|
printk(KERN_ERR "%s: unable to get IRQ %d\n", dev->name,
|
|
dev->irq);
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* Probe PHY address
|
|
*/
|
|
err = mdiobus_register(sc->mii_bus);
|
|
if (err) {
|
|
printk(KERN_ERR "%s: unable to register MDIO bus\n",
|
|
dev->name);
|
|
goto out_unirq;
|
|
}
|
|
|
|
sc->sbm_speed = sbmac_speed_none;
|
|
sc->sbm_duplex = sbmac_duplex_none;
|
|
sc->sbm_fc = sbmac_fc_none;
|
|
sc->sbm_pause = -1;
|
|
sc->sbm_link = 0;
|
|
|
|
/*
|
|
* Attach to the PHY
|
|
*/
|
|
err = sbmac_mii_probe(dev);
|
|
if (err)
|
|
goto out_unregister;
|
|
|
|
/*
|
|
* Turn on the channel
|
|
*/
|
|
|
|
sbmac_set_channel_state(sc,sbmac_state_on);
|
|
|
|
netif_start_queue(dev);
|
|
|
|
sbmac_set_rx_mode(dev);
|
|
|
|
phy_start(sc->phy_dev);
|
|
|
|
napi_enable(&sc->napi);
|
|
|
|
return 0;
|
|
|
|
out_unregister:
|
|
mdiobus_unregister(sc->mii_bus);
|
|
|
|
out_unirq:
|
|
free_irq(dev->irq, dev);
|
|
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
static int sbmac_mii_probe(struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
struct phy_device *phy_dev;
|
|
int i;
|
|
|
|
for (i = 0; i < PHY_MAX_ADDR; i++) {
|
|
phy_dev = sc->mii_bus->phy_map[i];
|
|
if (phy_dev)
|
|
break;
|
|
}
|
|
if (!phy_dev) {
|
|
printk(KERN_ERR "%s: no PHY found\n", dev->name);
|
|
return -ENXIO;
|
|
}
|
|
|
|
phy_dev = phy_connect(dev, dev_name(&phy_dev->dev), &sbmac_mii_poll, 0,
|
|
PHY_INTERFACE_MODE_GMII);
|
|
if (IS_ERR(phy_dev)) {
|
|
printk(KERN_ERR "%s: could not attach to PHY\n", dev->name);
|
|
return PTR_ERR(phy_dev);
|
|
}
|
|
|
|
/* Remove any features not supported by the controller */
|
|
phy_dev->supported &= SUPPORTED_10baseT_Half |
|
|
SUPPORTED_10baseT_Full |
|
|
SUPPORTED_100baseT_Half |
|
|
SUPPORTED_100baseT_Full |
|
|
SUPPORTED_1000baseT_Half |
|
|
SUPPORTED_1000baseT_Full |
|
|
SUPPORTED_Autoneg |
|
|
SUPPORTED_MII |
|
|
SUPPORTED_Pause |
|
|
SUPPORTED_Asym_Pause;
|
|
phy_dev->advertising = phy_dev->supported;
|
|
|
|
pr_info("%s: attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
|
|
dev->name, phy_dev->drv->name,
|
|
dev_name(&phy_dev->dev), phy_dev->irq);
|
|
|
|
sc->phy_dev = phy_dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void sbmac_mii_poll(struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
struct phy_device *phy_dev = sc->phy_dev;
|
|
unsigned long flags;
|
|
enum sbmac_fc fc;
|
|
int link_chg, speed_chg, duplex_chg, pause_chg, fc_chg;
|
|
|
|
link_chg = (sc->sbm_link != phy_dev->link);
|
|
speed_chg = (sc->sbm_speed != phy_dev->speed);
|
|
duplex_chg = (sc->sbm_duplex != phy_dev->duplex);
|
|
pause_chg = (sc->sbm_pause != phy_dev->pause);
|
|
|
|
if (!link_chg && !speed_chg && !duplex_chg && !pause_chg)
|
|
return; /* Hmmm... */
|
|
|
|
if (!phy_dev->link) {
|
|
if (link_chg) {
|
|
sc->sbm_link = phy_dev->link;
|
|
sc->sbm_speed = sbmac_speed_none;
|
|
sc->sbm_duplex = sbmac_duplex_none;
|
|
sc->sbm_fc = sbmac_fc_disabled;
|
|
sc->sbm_pause = -1;
|
|
pr_info("%s: link unavailable\n", dev->name);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (phy_dev->duplex == DUPLEX_FULL) {
|
|
if (phy_dev->pause)
|
|
fc = sbmac_fc_frame;
|
|
else
|
|
fc = sbmac_fc_disabled;
|
|
} else
|
|
fc = sbmac_fc_collision;
|
|
fc_chg = (sc->sbm_fc != fc);
|
|
|
|
pr_info("%s: link available: %dbase-%cD\n", dev->name, phy_dev->speed,
|
|
phy_dev->duplex == DUPLEX_FULL ? 'F' : 'H');
|
|
|
|
spin_lock_irqsave(&sc->sbm_lock, flags);
|
|
|
|
sc->sbm_speed = phy_dev->speed;
|
|
sc->sbm_duplex = phy_dev->duplex;
|
|
sc->sbm_fc = fc;
|
|
sc->sbm_pause = phy_dev->pause;
|
|
sc->sbm_link = phy_dev->link;
|
|
|
|
if ((speed_chg || duplex_chg || fc_chg) &&
|
|
sc->sbm_state != sbmac_state_off) {
|
|
/*
|
|
* something changed, restart the channel
|
|
*/
|
|
if (debug > 1)
|
|
pr_debug("%s: restarting channel "
|
|
"because PHY state changed\n", dev->name);
|
|
sbmac_channel_stop(sc);
|
|
sbmac_channel_start(sc);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&sc->sbm_lock, flags);
|
|
}
|
|
|
|
|
|
static void sbmac_tx_timeout (struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&sc->sbm_lock, flags);
|
|
|
|
|
|
dev->trans_start = jiffies;
|
|
dev->stats.tx_errors++;
|
|
|
|
spin_unlock_irqrestore(&sc->sbm_lock, flags);
|
|
|
|
printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
|
|
}
|
|
|
|
|
|
|
|
|
|
static void sbmac_set_rx_mode(struct net_device *dev)
|
|
{
|
|
unsigned long flags;
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
|
|
spin_lock_irqsave(&sc->sbm_lock, flags);
|
|
if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
|
|
/*
|
|
* Promiscuous changed.
|
|
*/
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
sbmac_promiscuous_mode(sc,1);
|
|
}
|
|
else {
|
|
sbmac_promiscuous_mode(sc,0);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&sc->sbm_lock, flags);
|
|
|
|
/*
|
|
* Program the multicasts. Do this every time.
|
|
*/
|
|
|
|
sbmac_setmulti(sc);
|
|
|
|
}
|
|
|
|
static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
|
|
if (!netif_running(dev) || !sc->phy_dev)
|
|
return -EINVAL;
|
|
|
|
return phy_mii_ioctl(sc->phy_dev, if_mii(rq), cmd);
|
|
}
|
|
|
|
static int sbmac_close(struct net_device *dev)
|
|
{
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
|
|
napi_disable(&sc->napi);
|
|
|
|
phy_stop(sc->phy_dev);
|
|
|
|
sbmac_set_channel_state(sc, sbmac_state_off);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
if (debug > 1)
|
|
pr_debug("%s: Shutting down ethercard\n", dev->name);
|
|
|
|
phy_disconnect(sc->phy_dev);
|
|
sc->phy_dev = NULL;
|
|
|
|
mdiobus_unregister(sc->mii_bus);
|
|
|
|
free_irq(dev->irq, dev);
|
|
|
|
sbdma_emptyring(&(sc->sbm_txdma));
|
|
sbdma_emptyring(&(sc->sbm_rxdma));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sbmac_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
|
|
struct net_device *dev = sc->sbm_dev;
|
|
int work_done;
|
|
|
|
work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
|
|
sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
|
|
|
|
if (work_done < budget) {
|
|
napi_complete(napi);
|
|
|
|
#ifdef CONFIG_SBMAC_COALESCE
|
|
__raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
|
|
((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
|
|
sc->sbm_imr);
|
|
#else
|
|
__raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
|
|
(M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
|
|
#endif
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
|
|
static int __devinit sbmac_probe(struct platform_device *pldev)
|
|
{
|
|
struct net_device *dev;
|
|
struct sbmac_softc *sc;
|
|
void __iomem *sbm_base;
|
|
struct resource *res;
|
|
u64 sbmac_orig_hwaddr;
|
|
int err;
|
|
|
|
res = platform_get_resource(pldev, IORESOURCE_MEM, 0);
|
|
BUG_ON(!res);
|
|
sbm_base = ioremap_nocache(res->start, res->end - res->start + 1);
|
|
if (!sbm_base) {
|
|
printk(KERN_ERR "%s: unable to map device registers\n",
|
|
dev_name(&pldev->dev));
|
|
err = -ENOMEM;
|
|
goto out_out;
|
|
}
|
|
|
|
/*
|
|
* The R_MAC_ETHERNET_ADDR register will be set to some nonzero
|
|
* value for us by the firmware if we're going to use this MAC.
|
|
* If we find a zero, skip this MAC.
|
|
*/
|
|
sbmac_orig_hwaddr = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR);
|
|
pr_debug("%s: %sconfiguring MAC at 0x%08Lx\n", dev_name(&pldev->dev),
|
|
sbmac_orig_hwaddr ? "" : "not ", (long long)res->start);
|
|
if (sbmac_orig_hwaddr == 0) {
|
|
err = 0;
|
|
goto out_unmap;
|
|
}
|
|
|
|
/*
|
|
* Okay, cool. Initialize this MAC.
|
|
*/
|
|
dev = alloc_etherdev(sizeof(struct sbmac_softc));
|
|
if (!dev) {
|
|
printk(KERN_ERR "%s: unable to allocate etherdev\n",
|
|
dev_name(&pldev->dev));
|
|
err = -ENOMEM;
|
|
goto out_unmap;
|
|
}
|
|
|
|
dev_set_drvdata(&pldev->dev, dev);
|
|
SET_NETDEV_DEV(dev, &pldev->dev);
|
|
|
|
sc = netdev_priv(dev);
|
|
sc->sbm_base = sbm_base;
|
|
|
|
err = sbmac_init(pldev, res->start);
|
|
if (err)
|
|
goto out_kfree;
|
|
|
|
return 0;
|
|
|
|
out_kfree:
|
|
free_netdev(dev);
|
|
__raw_writeq(sbmac_orig_hwaddr, sbm_base + R_MAC_ETHERNET_ADDR);
|
|
|
|
out_unmap:
|
|
iounmap(sbm_base);
|
|
|
|
out_out:
|
|
return err;
|
|
}
|
|
|
|
static int __exit sbmac_remove(struct platform_device *pldev)
|
|
{
|
|
struct net_device *dev = dev_get_drvdata(&pldev->dev);
|
|
struct sbmac_softc *sc = netdev_priv(dev);
|
|
|
|
unregister_netdev(dev);
|
|
sbmac_uninitctx(sc);
|
|
mdiobus_free(sc->mii_bus);
|
|
iounmap(sc->sbm_base);
|
|
free_netdev(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct platform_device **sbmac_pldev;
|
|
static int sbmac_max_units;
|
|
|
|
#if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) || defined(SBMAC_ETH3_HWADDR)
|
|
static void __init sbmac_setup_hwaddr(int idx, char *addr)
|
|
{
|
|
void __iomem *sbm_base;
|
|
unsigned long start, end;
|
|
uint8_t eaddr[6];
|
|
uint64_t val;
|
|
|
|
if (idx >= sbmac_max_units)
|
|
return;
|
|
|
|
start = A_MAC_CHANNEL_BASE(idx);
|
|
end = A_MAC_CHANNEL_BASE(idx + 1) - 1;
|
|
|
|
sbm_base = ioremap_nocache(start, end - start + 1);
|
|
if (!sbm_base) {
|
|
printk(KERN_ERR "%s: unable to map device registers\n",
|
|
sbmac_string);
|
|
return;
|
|
}
|
|
|
|
sbmac_parse_hwaddr(addr, eaddr);
|
|
val = sbmac_addr2reg(eaddr);
|
|
__raw_writeq(val, sbm_base + R_MAC_ETHERNET_ADDR);
|
|
val = __raw_readq(sbm_base + R_MAC_ETHERNET_ADDR);
|
|
|
|
iounmap(sbm_base);
|
|
}
|
|
#endif
|
|
|
|
static int __init sbmac_platform_probe_one(int idx)
|
|
{
|
|
struct platform_device *pldev;
|
|
struct {
|
|
struct resource r;
|
|
char name[strlen(sbmac_pretty) + 4];
|
|
} *res;
|
|
int err;
|
|
|
|
res = kzalloc(sizeof(*res), GFP_KERNEL);
|
|
if (!res) {
|
|
printk(KERN_ERR "%s.%d: unable to allocate memory\n",
|
|
sbmac_string, idx);
|
|
err = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
|
|
/*
|
|
* This is the base address of the MAC.
|
|
*/
|
|
snprintf(res->name, sizeof(res->name), "%s %d", sbmac_pretty, idx);
|
|
res->r.name = res->name;
|
|
res->r.flags = IORESOURCE_MEM;
|
|
res->r.start = A_MAC_CHANNEL_BASE(idx);
|
|
res->r.end = A_MAC_CHANNEL_BASE(idx + 1) - 1;
|
|
|
|
pldev = platform_device_register_simple(sbmac_string, idx, &res->r, 1);
|
|
if (IS_ERR(pldev)) {
|
|
printk(KERN_ERR "%s.%d: unable to register platform device\n",
|
|
sbmac_string, idx);
|
|
err = PTR_ERR(pldev);
|
|
goto out_kfree;
|
|
}
|
|
|
|
if (!pldev->dev.driver) {
|
|
err = 0; /* No hardware at this address. */
|
|
goto out_unregister;
|
|
}
|
|
|
|
sbmac_pldev[idx] = pldev;
|
|
return 0;
|
|
|
|
out_unregister:
|
|
platform_device_unregister(pldev);
|
|
|
|
out_kfree:
|
|
kfree(res);
|
|
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
static void __init sbmac_platform_probe(void)
|
|
{
|
|
int i;
|
|
|
|
/* Set the number of available units based on the SOC type. */
|
|
switch (soc_type) {
|
|
case K_SYS_SOC_TYPE_BCM1250:
|
|
case K_SYS_SOC_TYPE_BCM1250_ALT:
|
|
sbmac_max_units = 3;
|
|
break;
|
|
case K_SYS_SOC_TYPE_BCM1120:
|
|
case K_SYS_SOC_TYPE_BCM1125:
|
|
case K_SYS_SOC_TYPE_BCM1125H:
|
|
case K_SYS_SOC_TYPE_BCM1250_ALT2: /* Hybrid */
|
|
sbmac_max_units = 2;
|
|
break;
|
|
case K_SYS_SOC_TYPE_BCM1x55:
|
|
case K_SYS_SOC_TYPE_BCM1x80:
|
|
sbmac_max_units = 4;
|
|
break;
|
|
default:
|
|
return; /* none */
|
|
}
|
|
|
|
/*
|
|
* For bringup when not using the firmware, we can pre-fill
|
|
* the MAC addresses using the environment variables
|
|
* specified in this file (or maybe from the config file?)
|
|
*/
|
|
#ifdef SBMAC_ETH0_HWADDR
|
|
sbmac_setup_hwaddr(0, SBMAC_ETH0_HWADDR);
|
|
#endif
|
|
#ifdef SBMAC_ETH1_HWADDR
|
|
sbmac_setup_hwaddr(1, SBMAC_ETH1_HWADDR);
|
|
#endif
|
|
#ifdef SBMAC_ETH2_HWADDR
|
|
sbmac_setup_hwaddr(2, SBMAC_ETH2_HWADDR);
|
|
#endif
|
|
#ifdef SBMAC_ETH3_HWADDR
|
|
sbmac_setup_hwaddr(3, SBMAC_ETH3_HWADDR);
|
|
#endif
|
|
|
|
sbmac_pldev = kcalloc(sbmac_max_units, sizeof(*sbmac_pldev),
|
|
GFP_KERNEL);
|
|
if (!sbmac_pldev) {
|
|
printk(KERN_ERR "%s: unable to allocate memory\n",
|
|
sbmac_string);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Walk through the Ethernet controllers and find
|
|
* those who have their MAC addresses set.
|
|
*/
|
|
for (i = 0; i < sbmac_max_units; i++)
|
|
if (sbmac_platform_probe_one(i))
|
|
break;
|
|
}
|
|
|
|
|
|
static void __exit sbmac_platform_cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sbmac_max_units; i++)
|
|
platform_device_unregister(sbmac_pldev[i]);
|
|
kfree(sbmac_pldev);
|
|
}
|
|
|
|
|
|
static struct platform_driver sbmac_driver = {
|
|
.probe = sbmac_probe,
|
|
.remove = __exit_p(sbmac_remove),
|
|
.driver = {
|
|
.name = sbmac_string,
|
|
},
|
|
};
|
|
|
|
static int __init sbmac_init_module(void)
|
|
{
|
|
int err;
|
|
|
|
err = platform_driver_register(&sbmac_driver);
|
|
if (err)
|
|
return err;
|
|
|
|
sbmac_platform_probe();
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __exit sbmac_cleanup_module(void)
|
|
{
|
|
sbmac_platform_cleanup();
|
|
platform_driver_unregister(&sbmac_driver);
|
|
}
|
|
|
|
module_init(sbmac_init_module);
|
|
module_exit(sbmac_cleanup_module);
|