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linux/drivers/net/spider_net.h
Arnd Bergmann 11f1a52b87 [PATCH] spidernet: performance optimizations 
Performance optimizations, changes in these areas:
  - RX and TX checksum offload
  - correct maximum MTU
  - don't use TX interrupts anymore, use a timer instead
  - remove some superfluous barriers
  - improve RX RAM full handling

From: Utz Bacher <utz.bacher@de.ibm.com>
Signed-off-by: Jens Osterkamp <jens.osterkamp@de.ibm.com>
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-17 07:25:01 -05:00

479 lines
14 KiB
C
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/*
* Network device driver for Cell Processor-Based Blade
*
* (C) Copyright IBM Corp. 2005
*
* Authors : Utz Bacher <utz.bacher@de.ibm.com>
* Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _SPIDER_NET_H
#define _SPIDER_NET_H
#include "sungem_phy.h"
extern int spider_net_stop(struct net_device *netdev);
extern int spider_net_open(struct net_device *netdev);
extern struct ethtool_ops spider_net_ethtool_ops;
extern char spider_net_driver_name[];
#define SPIDER_NET_MAX_FRAME 2312
#define SPIDER_NET_MAX_MTU 2294
#define SPIDER_NET_MIN_MTU 64
#define SPIDER_NET_RXBUF_ALIGN 128
#define SPIDER_NET_RX_DESCRIPTORS_DEFAULT 256
#define SPIDER_NET_RX_DESCRIPTORS_MIN 16
#define SPIDER_NET_RX_DESCRIPTORS_MAX 512
#define SPIDER_NET_TX_DESCRIPTORS_DEFAULT 256
#define SPIDER_NET_TX_DESCRIPTORS_MIN 16
#define SPIDER_NET_TX_DESCRIPTORS_MAX 512
#define SPIDER_NET_TX_TIMER 20
#define SPIDER_NET_RX_CSUM_DEFAULT 1
#define SPIDER_NET_WATCHDOG_TIMEOUT 50*HZ
#define SPIDER_NET_NAPI_WEIGHT 64
#define SPIDER_NET_FIRMWARE_SEQS 6
#define SPIDER_NET_FIRMWARE_SEQWORDS 1024
#define SPIDER_NET_FIRMWARE_LEN (SPIDER_NET_FIRMWARE_SEQS * \
SPIDER_NET_FIRMWARE_SEQWORDS * \
sizeof(u32))
#define SPIDER_NET_FIRMWARE_NAME "spider_fw.bin"
/** spider_net SMMIO registers */
#define SPIDER_NET_GHIINT0STS 0x00000000
#define SPIDER_NET_GHIINT1STS 0x00000004
#define SPIDER_NET_GHIINT2STS 0x00000008
#define SPIDER_NET_GHIINT0MSK 0x00000010
#define SPIDER_NET_GHIINT1MSK 0x00000014
#define SPIDER_NET_GHIINT2MSK 0x00000018
#define SPIDER_NET_GRESUMINTNUM 0x00000020
#define SPIDER_NET_GREINTNUM 0x00000024
#define SPIDER_NET_GFFRMNUM 0x00000028
#define SPIDER_NET_GFAFRMNUM 0x0000002c
#define SPIDER_NET_GFBFRMNUM 0x00000030
#define SPIDER_NET_GFCFRMNUM 0x00000034
#define SPIDER_NET_GFDFRMNUM 0x00000038
/* clear them (don't use it) */
#define SPIDER_NET_GFREECNNUM 0x0000003c
#define SPIDER_NET_GONETIMENUM 0x00000040
#define SPIDER_NET_GTOUTFRMNUM 0x00000044
#define SPIDER_NET_GTXMDSET 0x00000050
#define SPIDER_NET_GPCCTRL 0x00000054
#define SPIDER_NET_GRXMDSET 0x00000058
#define SPIDER_NET_GIPSECINIT 0x0000005c
#define SPIDER_NET_GFTRESTRT 0x00000060
#define SPIDER_NET_GRXDMAEN 0x00000064
#define SPIDER_NET_GMRWOLCTRL 0x00000068
#define SPIDER_NET_GPCWOPCMD 0x0000006c
#define SPIDER_NET_GPCROPCMD 0x00000070
#define SPIDER_NET_GTTFRMCNT 0x00000078
#define SPIDER_NET_GTESTMD 0x0000007c
#define SPIDER_NET_GSINIT 0x00000080
#define SPIDER_NET_GSnPRGADR 0x00000084
#define SPIDER_NET_GSnPRGDAT 0x00000088
#define SPIDER_NET_GMACOPEMD 0x00000100
#define SPIDER_NET_GMACLENLMT 0x00000108
#define SPIDER_NET_GMACINTEN 0x00000118
#define SPIDER_NET_GMACPHYCTRL 0x00000120
#define SPIDER_NET_GMACAPAUSE 0x00000154
#define SPIDER_NET_GMACTXPAUSE 0x00000164
#define SPIDER_NET_GMACMODE 0x000001b0
#define SPIDER_NET_GMACBSTLMT 0x000001b4
#define SPIDER_NET_GMACUNIMACU 0x000001c0
#define SPIDER_NET_GMACUNIMACL 0x000001c8
#define SPIDER_NET_GMRMHFILnR 0x00000400
#define SPIDER_NET_MULTICAST_HASHES 256
#define SPIDER_NET_GMRUAFILnR 0x00000500
#define SPIDER_NET_GMRUA0FIL15R 0x00000578
/* RX DMA controller registers, all 0x00000a.. are for DMA controller A,
* 0x00000b.. for DMA controller B, etc. */
#define SPIDER_NET_GDADCHA 0x00000a00
#define SPIDER_NET_GDADMACCNTR 0x00000a04
#define SPIDER_NET_GDACTDPA 0x00000a08
#define SPIDER_NET_GDACTDCNT 0x00000a0c
#define SPIDER_NET_GDACDBADDR 0x00000a20
#define SPIDER_NET_GDACDBSIZE 0x00000a24
#define SPIDER_NET_GDACNEXTDA 0x00000a28
#define SPIDER_NET_GDACCOMST 0x00000a2c
#define SPIDER_NET_GDAWBCOMST 0x00000a30
#define SPIDER_NET_GDAWBRSIZE 0x00000a34
#define SPIDER_NET_GDAWBVSIZE 0x00000a38
#define SPIDER_NET_GDAWBTRST 0x00000a3c
#define SPIDER_NET_GDAWBTRERR 0x00000a40
/* TX DMA controller registers */
#define SPIDER_NET_GDTDCHA 0x00000e00
#define SPIDER_NET_GDTDMACCNTR 0x00000e04
#define SPIDER_NET_GDTCDPA 0x00000e08
#define SPIDER_NET_GDTDMASEL 0x00000e14
#define SPIDER_NET_ECMODE 0x00000f00
/* clock and reset control register */
#define SPIDER_NET_CKRCTRL 0x00000ff0
/** SCONFIG registers */
#define SPIDER_NET_SCONFIG_IOACTE 0x00002810
/** interrupt mask registers */
#define SPIDER_NET_INT0_MASK_VALUE 0x3f7fe2c7
#define SPIDER_NET_INT1_MASK_VALUE 0xffff7ff7
/* no MAC aborts -> auto retransmission */
#define SPIDER_NET_INT2_MASK_VALUE 0xffef7ff1
/* we rely on flagged descriptor interrupts */
#define SPIDER_NET_FRAMENUM_VALUE 0x00000000
/* set this first, then the FRAMENUM_VALUE */
#define SPIDER_NET_GFXFRAMES_VALUE 0x00000000
#define SPIDER_NET_STOP_SEQ_VALUE 0x00000000
#define SPIDER_NET_RUN_SEQ_VALUE 0x0000007e
#define SPIDER_NET_PHY_CTRL_VALUE 0x00040040
/* #define SPIDER_NET_PHY_CTRL_VALUE 0x01070080*/
#define SPIDER_NET_RXMODE_VALUE 0x00000011
/* auto retransmission in case of MAC aborts */
#define SPIDER_NET_TXMODE_VALUE 0x00010000
#define SPIDER_NET_RESTART_VALUE 0x00000000
#define SPIDER_NET_WOL_VALUE 0x00001111
#if 0
#define SPIDER_NET_WOL_VALUE 0x00000000
#endif
#define SPIDER_NET_IPSECINIT_VALUE 0x6f716f71
/* pause frames: automatic, no upper retransmission count */
/* outside loopback mode: ETOMOD signal dont matter, not connected */
#define SPIDER_NET_OPMODE_VALUE 0x00000063
/*#define SPIDER_NET_OPMODE_VALUE 0x001b0062*/
#define SPIDER_NET_LENLMT_VALUE 0x00000908
#define SPIDER_NET_MACAPAUSE_VALUE 0x00000800 /* about 1 ms */
#define SPIDER_NET_TXPAUSE_VALUE 0x00000000
#define SPIDER_NET_MACMODE_VALUE 0x00000001
#define SPIDER_NET_BURSTLMT_VALUE 0x00000200 /* about 16 us */
/* 1(0) enable r/tx dma
* 0000000 fixed to 0
*
* 000000 fixed to 0
* 0(1) en/disable descr writeback on force end
* 0(1) force end
*
* 000000 fixed to 0
* 00 burst alignment: 128 bytes
*
* 00000 fixed to 0
* 0 descr writeback size 32 bytes
* 0(1) descr chain end interrupt enable
* 0(1) descr status writeback enable */
/* to set RX_DMA_EN */
#define SPIDER_NET_DMA_RX_VALUE 0x80000000
#define SPIDER_NET_DMA_RX_FEND_VALUE 0x00030003
/* to set TX_DMA_EN */
#define SPIDER_NET_DMA_TX_VALUE 0x80000000
#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */
#define SPIDER_NET_UA_DESCR_VALUE 0x00080000
#define SPIDER_NET_PROMISC_VALUE 0x00080000
#define SPIDER_NET_NONPROMISC_VALUE 0x00000000
#define SPIDER_NET_DMASEL_VALUE 0x00000001
#define SPIDER_NET_ECMODE_VALUE 0x00000000
#define SPIDER_NET_CKRCTRL_RUN_VALUE 0x1fff010f
#define SPIDER_NET_CKRCTRL_STOP_VALUE 0x0000010f
#define SPIDER_NET_SBIMSTATE_VALUE 0x00000000
#define SPIDER_NET_SBTMSTATE_VALUE 0x00000000
/* SPIDER_NET_GHIINT0STS bits, in reverse order so that they can be used
* with 1 << SPIDER_NET_... */
enum spider_net_int0_status {
SPIDER_NET_GPHYINT = 0,
SPIDER_NET_GMAC2INT,
SPIDER_NET_GMAC1INT,
SPIDER_NET_GIPSINT,
SPIDER_NET_GFIFOINT,
SPIDER_NET_GDMACINT,
SPIDER_NET_GSYSINT,
SPIDER_NET_GPWOPCMPINT,
SPIDER_NET_GPROPCMPINT,
SPIDER_NET_GPWFFINT,
SPIDER_NET_GRMDADRINT,
SPIDER_NET_GRMARPINT,
SPIDER_NET_GRMMPINT,
SPIDER_NET_GDTDEN0INT,
SPIDER_NET_GDDDEN0INT,
SPIDER_NET_GDCDEN0INT,
SPIDER_NET_GDBDEN0INT,
SPIDER_NET_GDADEN0INT,
SPIDER_NET_GDTFDCINT,
SPIDER_NET_GDDFDCINT,
SPIDER_NET_GDCFDCINT,
SPIDER_NET_GDBFDCINT,
SPIDER_NET_GDAFDCINT,
SPIDER_NET_GTTEDINT,
SPIDER_NET_GDTDCEINT,
SPIDER_NET_GRFDNMINT,
SPIDER_NET_GRFCNMINT,
SPIDER_NET_GRFBNMINT,
SPIDER_NET_GRFANMINT,
SPIDER_NET_GRFNMINT,
SPIDER_NET_G1TMCNTINT,
SPIDER_NET_GFREECNTINT
};
/* GHIINT1STS bits */
enum spider_net_int1_status {
SPIDER_NET_GTMFLLINT = 0,
SPIDER_NET_GRMFLLINT,
SPIDER_NET_GTMSHTINT,
SPIDER_NET_GDTINVDINT,
SPIDER_NET_GRFDFLLINT,
SPIDER_NET_GDDDCEINT,
SPIDER_NET_GDDINVDINT,
SPIDER_NET_GRFCFLLINT,
SPIDER_NET_GDCDCEINT,
SPIDER_NET_GDCINVDINT,
SPIDER_NET_GRFBFLLINT,
SPIDER_NET_GDBDCEINT,
SPIDER_NET_GDBINVDINT,
SPIDER_NET_GRFAFLLINT,
SPIDER_NET_GDADCEINT,
SPIDER_NET_GDAINVDINT,
SPIDER_NET_GDTRSERINT,
SPIDER_NET_GDDRSERINT,
SPIDER_NET_GDCRSERINT,
SPIDER_NET_GDBRSERINT,
SPIDER_NET_GDARSERINT,
SPIDER_NET_GDSERINT,
SPIDER_NET_GDTPTERINT,
SPIDER_NET_GDDPTERINT,
SPIDER_NET_GDCPTERINT,
SPIDER_NET_GDBPTERINT,
SPIDER_NET_GDAPTERINT
};
/* GHIINT2STS bits */
enum spider_net_int2_status {
SPIDER_NET_GPROPERINT = 0,
SPIDER_NET_GMCTCRSNGINT,
SPIDER_NET_GMCTLCOLINT,
SPIDER_NET_GMCTTMOTINT,
SPIDER_NET_GMCRCAERINT,
SPIDER_NET_GMCRCALERINT,
SPIDER_NET_GMCRALNERINT,
SPIDER_NET_GMCROVRINT,
SPIDER_NET_GMCRRNTINT,
SPIDER_NET_GMCRRXERINT,
SPIDER_NET_GTITCSERINT,
SPIDER_NET_GTIFMTERINT,
SPIDER_NET_GTIPKTRVKINT,
SPIDER_NET_GTISPINGINT,
SPIDER_NET_GTISADNGINT,
SPIDER_NET_GTISPDNGINT,
SPIDER_NET_GRIFMTERINT,
SPIDER_NET_GRIPKTRVKINT,
SPIDER_NET_GRISPINGINT,
SPIDER_NET_GRISADNGINT,
SPIDER_NET_GRISPDNGINT
};
#define SPIDER_NET_TXINT ( (1 << SPIDER_NET_GTTEDINT) | \
(1 << SPIDER_NET_GDTDCEINT) | \
(1 << SPIDER_NET_GDTFDCINT) )
/* we rely on flagged descriptor interrupts*/
#define SPIDER_NET_RXINT ( (1 << SPIDER_NET_GDAFDCINT) | \
(1 << SPIDER_NET_GRMFLLINT) )
#define SPIDER_NET_ERRINT ( 0xffffffff & \
(~SPIDER_NET_TXINT) & \
(~SPIDER_NET_RXINT) )
#define SPIDER_NET_GPREXEC 0x80000000
#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
/* descriptor bits
*
* 1010 descriptor ready
* 0 descr in middle of chain
* 000 fixed to 0
*
* 0 no interrupt on completion
* 000 fixed to 0
* 1 no ipsec processing
* 1 last descriptor for this frame
* 00 no checksum
* 10 tcp checksum
* 11 udp checksum
*
* 00 fixed to 0
* 0 fixed to 0
* 0 no interrupt on response errors
* 0 no interrupt on invalid descr
* 0 no interrupt on dma process termination
* 0 no interrupt on descr chain end
* 0 no interrupt on descr complete
*
* 000 fixed to 0
* 0 response error interrupt status
* 0 invalid descr status
* 0 dma termination status
* 0 descr chain end status
* 0 descr complete status */
#define SPIDER_NET_DMAC_CMDSTAT_NOCS 0xa00c0000
#define SPIDER_NET_DMAC_CMDSTAT_TCPCS 0xa00e0000
#define SPIDER_NET_DMAC_CMDSTAT_UDPCS 0xa00f0000
#define SPIDER_NET_DESCR_IND_PROC_SHIFT 28
#define SPIDER_NET_DESCR_IND_PROC_MASKO 0x0fffffff
/* descr ready, descr is in middle of chain, get interrupt on completion */
#define SPIDER_NET_DMAC_RX_CARDOWNED 0xa0800000
enum spider_net_descr_status {
SPIDER_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
SPIDER_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
SPIDER_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
SPIDER_NET_DESCR_FRAME_END = 0x04, /* used in rx */
SPIDER_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
SPIDER_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
SPIDER_NET_DESCR_NOT_IN_USE /* any other value */
};
struct spider_net_descr {
/* as defined by the hardware */
u32 buf_addr;
u32 buf_size;
u32 next_descr_addr;
u32 dmac_cmd_status;
u32 result_size;
u32 valid_size; /* all zeroes for tx */
u32 data_status;
u32 data_error; /* all zeroes for tx */
/* used in the driver */
struct sk_buff *skb;
u32 bus_addr;
struct spider_net_descr *next;
struct spider_net_descr *prev;
} __attribute__((aligned(32)));
struct spider_net_descr_chain {
/* we walk from tail to head */
struct spider_net_descr *head;
struct spider_net_descr *tail;
};
/* descriptor data_status bits */
#define SPIDER_NET_RX_IPCHK 29
#define SPIDER_NET_RX_TCPCHK 28
#define SPIDER_NET_VLAN_PACKET 21
#define SPIDER_NET_DATA_STATUS_CKSUM_MASK ( (1 << SPIDER_NET_RX_IPCHK) | \
(1 << SPIDER_NET_RX_TCPCHK) )
/* descriptor data_error bits */
#define SPIDER_NET_RX_IPCHKERR 27
#define SPIDER_NET_RX_RXTCPCHKERR 28
#define SPIDER_NET_DATA_ERR_CKSUM_MASK (1 << SPIDER_NET_RX_IPCHKERR)
/* the cases we don't pass the packet to the stack.
* 701b8000 would be correct, but every packets gets that flag */
#define SPIDER_NET_DESTROY_RX_FLAGS 0x700b8000
#define SPIDER_NET_DESCR_SIZE 32
/* this will be bigger some time */
struct spider_net_options {
int rx_csum; /* for rx: if 0 ip_summed=NONE,
if 1 and hw has verified, ip_summed=UNNECESSARY */
};
#define SPIDER_NET_DEFAULT_MSG ( NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK | \
NETIF_MSG_TIMER | \
NETIF_MSG_IFDOWN | \
NETIF_MSG_IFUP | \
NETIF_MSG_RX_ERR | \
NETIF_MSG_TX_ERR | \
NETIF_MSG_TX_QUEUED | \
NETIF_MSG_INTR | \
NETIF_MSG_TX_DONE | \
NETIF_MSG_RX_STATUS | \
NETIF_MSG_PKTDATA | \
NETIF_MSG_HW | \
NETIF_MSG_WOL )
struct spider_net_card {
struct net_device *netdev;
struct pci_dev *pdev;
struct mii_phy phy;
void __iomem *regs;
struct spider_net_descr_chain tx_chain;
struct spider_net_descr_chain rx_chain;
atomic_t rx_chain_refill;
atomic_t tx_chain_release;
struct net_device_stats netdev_stats;
struct spider_net_options options;
spinlock_t intmask_lock;
struct tasklet_struct rxram_full_tl;
struct timer_list tx_timer;
struct work_struct tx_timeout_task;
atomic_t tx_timeout_task_counter;
wait_queue_head_t waitq;
/* for ethtool */
int msg_enable;
struct spider_net_descr descr[0];
};
#define pr_err(fmt,arg...) \
printk(KERN_ERR fmt ,##arg)
#endif
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