File: [local] / sys / dev / pci / if_em.h (download)
Revision 1.1, Tue Mar 4 16:13:06 2008 UTC (16 years, 2 months ago) by nbrk
Branch point for: MAIN
Initial revision
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/**************************************************************************
Copyright (c) 2001-2003, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. Neither the name of the Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
/* $FreeBSD: if_em.h,v 1.26 2004/09/01 23:22:41 pdeuskar Exp $ */
/* $OpenBSD: if_em.h,v 1.35 2007/05/30 06:29:17 ckuethe Exp $ */
#ifndef _EM_H_DEFINED_
#define _EM_H_DEFINED_
#include "bpfilter.h"
#include "vlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#endif
#if NVLAN > 0
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#endif
#include <uvm/uvm_extern.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/if_em_hw.h>
/* Tunables */
/*
* EM_TXD: Maximum number of Transmit Descriptors
* Valid Range: 80-256 for 82542 and 82543-based adapters
* 80-4096 for others
* Default Value: 256
* This value is the number of transmit descriptors allocated by the driver.
* Increasing this value allows the driver to queue more transmits. Each
* descriptor is 16 bytes.
* Since TDLEN should be multiple of 128bytes, the number of transmit
* desscriptors should meet the following condition.
* (num_tx_desc * sizeof(struct em_tx_desc)) % 128 == 0
*/
#define EM_MIN_TXD 12
#define EM_MAX_TXD_82543 256
#define EM_MAX_TXD 512
/*
* EM_RXD - Maximum number of receive Descriptors
* Valid Range: 80-256 for 82542 and 82543-based adapters
* 80-4096 for others
* Default Value: 256
* This value is the number of receive descriptors allocated by the driver.
* Increasing this value allows the driver to buffer more incoming packets.
* Each descriptor is 16 bytes. A receive buffer is also allocated for each
* descriptor. The maximum MTU size is 16110.
* Since TDLEN should be multiple of 128bytes, the number of transmit
* desscriptors should meet the following condition.
* (num_tx_desc * sizeof(struct em_tx_desc)) % 128 == 0
*/
#define EM_MIN_RXD 12
#define EM_MAX_RXD 256
/*
* MAX_INTS_PER_SEC (ITR - Interrupt Throttle Register)
* The Interrupt Throttle Register (ITR) limits the delivery of interrupts
* to a reasonable rate by providing a guaranteed inter-interrupt delay
* between interrupts asserted by the Ethernet controller.
*/
#define MAX_INTS_PER_SEC 8000
#define DEFAULT_ITR 1000000000/(MAX_INTS_PER_SEC * 256)
/*
* EM_TIDV - Transmit Interrupt Delay Value
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value delays the generation of transmit interrupts in units of
* 1.024 microseconds. Transmit interrupt reduction can improve CPU
* efficiency if properly tuned for specific network traffic. If the
* system is reporting dropped transmits, this value may be set too high
* causing the driver to run out of available transmit descriptors.
*/
#define EM_TIDV 64
/*
* EM_TADV - Transmit Absolute Interrupt Delay Value
* (Not valid for 82542/82543/82544)
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value, in units of 1.024 microseconds, limits the delay in which a
* transmit interrupt is generated. Useful only if EM_TIDV is non-zero,
* this value ensures that an interrupt is generated after the initial
* packet is sent on the wire within the set amount of time. Proper tuning,
* along with EM_TIDV, may improve traffic throughput in specific
* network conditions.
*/
#define EM_TADV 64
/*
* EM_RDTR - Receive Interrupt Delay Timer (Packet Timer)
* Valid Range: 0-65535 (0=off)
* Default Value: 0
* This value delays the generation of receive interrupts in units of 1.024
* microseconds. Receive interrupt reduction can improve CPU efficiency if
* properly tuned for specific network traffic. Increasing this value adds
* extra latency to frame reception and can end up decreasing the throughput
* of TCP traffic. If the system is reporting dropped receives, this value
* may be set too high, causing the driver to run out of available receive
* descriptors.
*
* CAUTION: When setting EM_RDTR to a value other than 0, adapters
* may hang (stop transmitting) under certain network conditions.
* If this occurs a WATCHDOG message is logged in the system
* event log. In addition, the controller is automatically reset,
* restoring the network connection. To eliminate the potential
* for the hang ensure that EM_RDTR is set to 0.
*/
#define EM_RDTR 0
/*
* Receive Interrupt Absolute Delay Timer (Not valid for 82542/82543/82544)
* Valid Range: 0-65535 (0=off)
* Default Value: 64
* This value, in units of 1.024 microseconds, limits the delay in which a
* receive interrupt is generated. Useful only if EM_RDTR is non-zero,
* this value ensures that an interrupt is generated after the initial
* packet is received within the set amount of time. Proper tuning,
* along with EM_RDTR, may improve traffic throughput in specific network
* conditions.
*/
#define EM_RADV 64
/*
* This parameter controls the duration of transmit watchdog timer.
*/
#define EM_TX_TIMEOUT 5 /* set to 5 seconds */
/*
* These parameters control when the driver calls the routine to reclaim
* transmit descriptors.
*/
#define EM_TX_CLEANUP_THRESHOLD (sc->num_tx_desc / 8)
#define EM_TX_OP_THRESHOLD (sc->num_tx_desc / 32)
/*
* This parameter controls whether or not autonegotation is enabled.
* 0 - Disable autonegotiation
* 1 - Enable autonegotiation
*/
#define DO_AUTO_NEG 1
/*
* This parameter control whether or not the driver will wait for
* autonegotiation to complete.
* 1 - Wait for autonegotiation to complete
* 0 - Don't wait for autonegotiation to complete
*/
#define WAIT_FOR_AUTO_NEG_DEFAULT 0
/*
* EM_MASTER_SLAVE is only defined to enable a workaround for a known
* compatibility issue with 82541/82547 devices and some switches.
* See the "Known Limitations" section of the README file for a complete
* description and a list of affected switches.
*
* 0 = Hardware default
* 1 = Master mode
* 2 = Slave mode
* 3 = Auto master/slave
*/
/* #define EM_MASTER_SLAVE 2 */
/* Tunables -- End */
#define AUTONEG_ADV_DEFAULT (ADVERTISE_10_HALF | ADVERTISE_10_FULL | \
ADVERTISE_100_HALF | ADVERTISE_100_FULL | \
ADVERTISE_1000_FULL)
#define EM_MMBA 0x0010 /* Mem base address */
#define EM_FLASH 0x0014 /* Flash memory on ICH8 */
#define EM_ROUNDUP(size, unit) (((size) + (unit) - 1) & ~((unit) - 1))
#define EM_SMARTSPEED_DOWNSHIFT 3
#define EM_SMARTSPEED_MAX 15
#define MAX_NUM_MULTICAST_ADDRESSES 128
/*
* TDBA/RDBA should be aligned on 16 byte boundary. But TDLEN/RDLEN should be
* multiple of 128 bytes. So we align TDBA/RDBA on 128 byte boundary. This will
* also optimize cache line size effect. H/W supports up to cache line size 128.
*/
#define EM_DBA_ALIGN 128
#define SPEED_MODE_BIT (1<<21) /* On PCI-E MACs only */
/* Defines for printing debug information */
#define DEBUG_INIT 0
#define DEBUG_IOCTL 0
#define DEBUG_HW 0
#define INIT_DEBUGOUT(S) if (DEBUG_INIT) printf(S "\n")
#define INIT_DEBUGOUT1(S, A) if (DEBUG_INIT) printf(S "\n", A)
#define INIT_DEBUGOUT2(S, A, B) if (DEBUG_INIT) printf(S "\n", A, B)
#define IOCTL_DEBUGOUT(S) if (DEBUG_IOCTL) printf(S "\n")
#define IOCTL_DEBUGOUT1(S, A) if (DEBUG_IOCTL) printf(S "\n", A)
#define IOCTL_DEBUGOUT2(S, A, B) if (DEBUG_IOCTL) printf(S "\n", A, B)
#define HW_DEBUGOUT(S) if (DEBUG_HW) printf(S "\n")
#define HW_DEBUGOUT1(S, A) if (DEBUG_HW) printf(S "\n", A)
#define HW_DEBUGOUT2(S, A, B) if (DEBUG_HW) printf(S "\n", A, B)
/* Supported RX Buffer Sizes */
#define EM_RXBUFFER_2048 2048
#define EM_RXBUFFER_4096 4096
#define EM_RXBUFFER_8192 8192
#define EM_RXBUFFER_16384 16384
#define EM_MAX_SCATTER 64
#define EM_TSO_SIZE 65535
struct em_buffer {
int next_eop; /* Index of the desc to watch */
struct mbuf *m_head;
bus_dmamap_t map; /* bus_dma map for packet */
};
/*
* Bus dma allocation structure used by
* em_dma_malloc and em_dma_free.
*/
struct em_dma_alloc {
bus_addr_t dma_paddr;
caddr_t dma_vaddr;
bus_dma_tag_t dma_tag;
bus_dmamap_t dma_map;
bus_dma_segment_t dma_seg;
bus_size_t dma_size;
int dma_nseg;
};
typedef enum _XSUM_CONTEXT_T {
OFFLOAD_NONE,
OFFLOAD_TCP_IP,
OFFLOAD_UDP_IP
} XSUM_CONTEXT_T;
/* For 82544 PCI-X Workaround */
typedef struct _ADDRESS_LENGTH_PAIR
{
u_int64_t address;
u_int32_t length;
} ADDRESS_LENGTH_PAIR, *PADDRESS_LENGTH_PAIR;
typedef struct _DESCRIPTOR_PAIR
{
ADDRESS_LENGTH_PAIR descriptor[4];
u_int32_t elements;
} DESC_ARRAY, *PDESC_ARRAY;
/* Our adapter structure */
struct em_softc {
struct device sc_dv;
struct arpcom interface_data;
struct em_hw hw;
/* OpenBSD operating-system-specific structures */
struct em_osdep osdep;
struct ifmedia media;
int io_rid;
void *sc_intrhand;
struct timeout em_intr_enable;
struct timeout timer_handle;
struct timeout tx_fifo_timer_handle;
int if_flags;
void *sc_powerhook;
void *sc_shutdownhook;
#ifdef __STRICT_ALIGNMENT
/* Used for carrying forward alignment adjustments */
unsigned char align_buf[ETHER_ALIGN]; /* tail of unaligned packet */
u_int8_t align_buf_len; /* bytes in tail */
#endif /* __STRICT_ALIGNMENT */
/* Info about the board itself */
u_int32_t part_num;
u_int8_t link_active;
u_int16_t link_speed;
u_int16_t link_duplex;
u_int32_t smartspeed;
u_int32_t tx_int_delay;
u_int32_t tx_abs_int_delay;
u_int32_t rx_int_delay;
u_int32_t rx_abs_int_delay;
XSUM_CONTEXT_T active_checksum_context;
/*
* Transmit definitions
*
* We have an array of num_tx_desc descriptors (handled
* by the controller) paired with an array of tx_buffers
* (at tx_buffer_area).
* The index of the next available descriptor is next_avail_tx_desc.
* The number of remaining tx_desc is num_tx_desc_avail.
*/
struct em_dma_alloc txdma; /* bus_dma glue for tx desc */
struct em_tx_desc *tx_desc_base;
u_int32_t next_avail_tx_desc;
u_int32_t next_tx_to_clean;
volatile u_int16_t num_tx_desc_avail;
u_int16_t num_tx_desc;
u_int32_t txd_cmd;
struct em_buffer *tx_buffer_area;
bus_dma_tag_t txtag; /* dma tag for tx */
/*
* Receive definitions
*
* we have an array of num_rx_desc rx_desc (handled by the
* controller), and paired with an array of rx_buffers
* (at rx_buffer_area).
* The next pair to check on receive is at offset next_rx_desc_to_check
*/
struct em_dma_alloc rxdma; /* bus_dma glue for rx desc */
struct em_rx_desc *rx_desc_base;
u_int32_t next_rx_desc_to_check;
u_int32_t rx_buffer_len;
u_int16_t num_rx_desc;
struct em_buffer *rx_buffer_area;
bus_dma_tag_t rxtag;
bus_dmamap_t rx_sparemap;
/*
* First/last mbuf pointers, for
* collecting multisegment RX packets.
*/
struct mbuf *fmp;
struct mbuf *lmp;
/* Misc stats maintained by the driver */
unsigned long dropped_pkts;
unsigned long mbuf_alloc_failed;
unsigned long mbuf_cluster_failed;
unsigned long no_tx_desc_avail1;
unsigned long no_tx_desc_avail2;
unsigned long no_tx_map_avail;
unsigned long no_tx_dma_setup;
unsigned long watchdog_events;
unsigned long rx_overruns;
/* Used in for 82547 10Mb Half workaround */
#define EM_PBA_BYTES_SHIFT 0xA
#define EM_TX_HEAD_ADDR_SHIFT 7
#define EM_PBA_TX_MASK 0xFFFF0000
#define EM_FIFO_HDR 0x10
#define EM_82547_PKT_THRESH 0x3e0
u_int32_t tx_fifo_size;
u_int32_t tx_fifo_head;
u_int32_t tx_fifo_head_addr;
u_int64_t tx_fifo_reset_cnt;
u_int64_t tx_fifo_wrk_cnt;
u_int32_t tx_head_addr;
/* For 82544 PCI-X Workaround */
boolean_t pcix_82544;
struct em_hw_stats stats;
};
#endif /* _EM_H_DEFINED_ */
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