/*-
* Copyright (c) 1995, David Greenman
* 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 unmodified, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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: src/sys/dev/fxp/if_fxpvar.h,v 1.40.6.1 2008/11/25 02:59:29 kensmith Exp $
*/
/*
* Misc. defintions for the Intel EtherExpress Pro/100B PCI Fast
* Ethernet driver
*/
/*
* Number of transmit control blocks. This determines the number
* of transmit buffers that can be chained in the CB list.
* This must be a power of two.
*/
#define FXP_NTXCB 128
/*
* Size of the TxCB list.
*/
#define FXP_TXCB_SZ (FXP_NTXCB * sizeof(struct fxp_cb_tx))
/*
* Macro to obtain the DMA address of a virtual address in the
* TxCB list based on the base DMA address of the TxCB list.
*/
#define FXP_TXCB_DMA_ADDR(sc, addr) \
(sc->fxp_desc.cbl_addr + (uintptr_t)addr - \
(uintptr_t)sc->fxp_desc.cbl_list)
/*
* Number of completed TX commands at which point an interrupt
* will be generated to garbage collect the attached buffers.
* Must be at least one less than FXP_NTXCB, and should be
* enough less so that the transmitter doesn't becomes idle
* during the buffer rundown (which would reduce performance).
*/
#define FXP_CXINT_THRESH 120
/*
* TxCB list index mask. This is used to do list wrap-around.
*/
#define FXP_TXCB_MASK (FXP_NTXCB - 1)
/*
* Number of receive frame area buffers. These are large so chose
* wisely.
*/
#ifdef DEVICE_POLLING
#define FXP_NRFABUFS 192
#else
#define FXP_NRFABUFS 64
#endif
/*
* Maximum number of seconds that the receiver can be idle before we
* assume it's dead and attempt to reset it by reprogramming the
* multicast filter. This is part of a work-around for a bug in the
* NIC. See fxp_stats_update().
*/
#define FXP_MAX_RX_IDLE 15
/*
* Default maximum time, in microseconds, that an interrupt may be delayed
* in an attempt to coalesce interrupts. This is only effective if the Intel
* microcode is loaded, and may be changed via either loader tunables or
* sysctl. See also the CPUSAVER_DWORD entry in rcvbundl.h.
*/
#define TUNABLE_INT_DELAY 1000
/*
* Default number of packets that will be bundled, before an interrupt is
* generated. This is only effective if the Intel microcode is loaded, and
* may be changed via either loader tunables or sysctl. This may not be
* present in all microcode revisions, see also the CPUSAVER_BUNDLE_MAX_DWORD
* entry in rcvbundl.h.
*/
#define TUNABLE_BUNDLE_MAX 6
#define FXP_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define FXP_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define FXP_LOCK_ASSERT(_sc, _what) mtx_assert(&(_sc)->sc_mtx, (_what))
/*
* Structures to handle TX and RX descriptors.
*/
struct fxp_rx {
struct fxp_rx *rx_next;
struct mbuf *rx_mbuf;
bus_dmamap_t rx_map;
uint32_t rx_addr;
};
struct fxp_tx {
struct fxp_tx *tx_next;
struct fxp_cb_tx *tx_cb;
struct mbuf *tx_mbuf;
bus_dmamap_t tx_map;
};
struct fxp_desc_list {
struct fxp_rx rx_list[FXP_NRFABUFS];
struct fxp_tx tx_list[FXP_NTXCB];
struct fxp_tx mcs_tx;
struct fxp_rx *rx_head;
struct fxp_rx *rx_tail;
struct fxp_tx *tx_first;
struct fxp_tx *tx_last;
struct fxp_rfa *rfa_list;
struct fxp_cb_tx *cbl_list;
uint32_t cbl_addr;
bus_dma_tag_t rx_tag;
};
/*
* NOTE: Elements are ordered for optimal cacheline behavior, and NOT
* for functional grouping.
*/
struct fxp_softc {
struct ifnet *ifp; /* per-interface network data */
struct resource *fxp_res[2]; /* I/O and IRQ resources */
struct resource_spec *fxp_spec; /* the resource spec we used */
void *ih; /* interrupt handler cookie */
struct mtx sc_mtx;
bus_dma_tag_t fxp_mtag; /* bus DMA tag for mbufs */
bus_dma_tag_t fxp_stag; /* bus DMA tag for stats */
bus_dmamap_t fxp_smap; /* bus DMA map for stats */
bus_dma_tag_t cbl_tag; /* DMA tag for the TxCB list */
bus_dmamap_t cbl_map; /* DMA map for the TxCB list */
bus_dma_tag_t mcs_tag; /* DMA tag for the multicast setup */
bus_dmamap_t mcs_map; /* DMA map for the multicast setup */
bus_dmamap_t spare_map; /* spare DMA map */
struct fxp_desc_list fxp_desc; /* descriptors management struct */
int maxtxseg; /* maximum # of TX segments */
int tx_queued; /* # of active TxCB's */
int need_mcsetup; /* multicast filter needs programming */
struct fxp_stats *fxp_stats; /* Pointer to interface stats */
uint32_t stats_addr; /* DMA address of the stats structure */
int rx_idle_secs; /* # of seconds RX has been idle */
struct callout stat_ch; /* stat callout */
int watchdog_timer; /* seconds until chip reset */
struct fxp_cb_mcs *mcsp; /* Pointer to mcast setup descriptor */
uint32_t mcs_addr; /* DMA address of the multicast cmd */
struct ifmedia sc_media; /* media information */
device_t miibus;
#ifdef __rtems__
int phyidx;
#endif
device_t dev;
int tunable_int_delay; /* interrupt delay value for ucode */
int tunable_bundle_max; /* max # frames per interrupt (ucode) */
int tunable_noflow; /* flow control disabled */
int rnr; /* RNR events */
int eeprom_size; /* size of serial EEPROM */
int suspended; /* 0 = normal 1 = suspended or dead */
int cu_resume_bug;
int revision;
int flags;
uint8_t rfa_size;
uint32_t tx_cmd;
};
#define FXP_FLAG_MWI_ENABLE 0x0001 /* MWI enable */
#define FXP_FLAG_READ_ALIGN 0x0002 /* align read access with cacheline */
#define FXP_FLAG_WRITE_ALIGN 0x0004 /* end write on cacheline */
#define FXP_FLAG_EXT_TXCB 0x0008 /* enable use of extended TXCB */
#define FXP_FLAG_SERIAL_MEDIA 0x0010 /* 10Mbps serial interface */
#define FXP_FLAG_LONG_PKT_EN 0x0020 /* enable long packet reception */
#define FXP_FLAG_ALL_MCAST 0x0040 /* accept all multicast frames */
#define FXP_FLAG_CU_RESUME_BUG 0x0080 /* requires workaround for CU_RESUME */
#define FXP_FLAG_UCODE 0x0100 /* ucode is loaded */
#define FXP_FLAG_DEFERRED_RNR 0x0200 /* DEVICE_POLLING deferred RNR */
#define FXP_FLAG_EXT_RFA 0x0400 /* extended RFDs for csum offload */
#define FXP_FLAG_SAVE_BAD 0x0800 /* save bad pkts: bad size, CRC, etc */
/* Macros to ease CSR access. */
#define CSR_READ_1(sc, reg) bus_read_1(sc->fxp_res[0], reg)
#define CSR_READ_2(sc, reg) bus_read_2(sc->fxp_res[0], reg)
#define CSR_READ_4(sc, reg) bus_read_4(sc->fxp_res[0], reg)
#define CSR_WRITE_1(sc, reg, val) bus_write_1(sc->fxp_res[0], reg, val)
#define CSR_WRITE_2(sc, reg, val) bus_write_2(sc->fxp_res[0], reg, val)
#define CSR_WRITE_4(sc, reg, val) bus_write_4(sc->fxp_res[0], reg, val)
