231 lines
8.1 KiB
C
231 lines
8.1 KiB
C
/*
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* Copyright (c) 1995, David Greenman
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Misc. defintions for the Intel EtherExpress Pro/100B PCI Fast
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* Ethernet driver
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*/
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/*
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* Number of transmit control blocks. This determines the number
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* of transmit buffers that can be chained in the CB list.
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* This must be a power of two.
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*/
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#define FXP_NTXCB 128
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/*
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* Size of the TxCB list.
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*/
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#define FXP_TXCB_SZ (FXP_NTXCB * sizeof(struct fxp_cb_tx))
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/*
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* Macro to obtain the DMA address of a virtual address in the
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* TxCB list based on the base DMA address of the TxCB list.
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*/
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#define FXP_TXCB_DMA_ADDR(sc, addr) \
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(sc->fxp_desc.cbl_addr + (uintptr_t)addr - \
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(uintptr_t)sc->fxp_desc.cbl_list)
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/*
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* Number of completed TX commands at which point an interrupt
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* will be generated to garbage collect the attached buffers.
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* Must be at least one less than FXP_NTXCB, and should be
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* enough less so that the transmitter doesn't becomes idle
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* during the buffer rundown (which would reduce performance).
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*/
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#define FXP_CXINT_THRESH 120
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/*
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* TxCB list index mask. This is used to do list wrap-around.
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*/
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#define FXP_TXCB_MASK (FXP_NTXCB - 1)
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/*
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* Number of receive frame area buffers. These are large so chose
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* wisely.
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*/
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#ifdef DEVICE_POLLING
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#define FXP_NRFABUFS 192
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#else
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#define FXP_NRFABUFS 64
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#endif
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/*
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* Maximum number of seconds that the receiver can be idle before we
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* assume it's dead and attempt to reset it by reprogramming the
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* multicast filter. This is part of a work-around for a bug in the
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* NIC. See fxp_stats_update().
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*/
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#define FXP_MAX_RX_IDLE 15
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/*
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* Default maximum time, in microseconds, that an interrupt may be delayed
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* in an attempt to coalesce interrupts. This is only effective if the Intel
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* microcode is loaded, and may be changed via either loader tunables or
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* sysctl. See also the CPUSAVER_DWORD entry in rcvbundl.h.
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*/
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#define TUNABLE_INT_DELAY 1000
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/*
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* Default number of packets that will be bundled, before an interrupt is
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* generated. This is only effective if the Intel microcode is loaded, and
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* may be changed via either loader tunables or sysctl. This may not be
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* present in all microcode revisions, see also the CPUSAVER_BUNDLE_MAX_DWORD
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* entry in rcvbundl.h.
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*/
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#define TUNABLE_BUNDLE_MAX 6
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#if __FreeBSD_version < 500000
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#define FXP_LOCK(_sc)
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#define FXP_UNLOCK(_sc)
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#define FXP_LOCKED(_sc)
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#define FXP_LOCK_ASSERT(_sc, _what)
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#define INTR_MPSAFE 0
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#define mtx_init(a, b, c, d)
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#define mtx_destroy(a)
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struct mtx { int dummy; };
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#else
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#define FXP_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
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#define FXP_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
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#define FXP_LOCKED(_sc) mtx_owned(&(_sc)->sc_mtx)
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#define FXP_LOCK_ASSERT(_sc, _what) mtx_assert(&(_sc)->sc_mtx, (_what))
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#endif
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/*
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* Structures to handle TX and RX descriptors.
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*/
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struct fxp_rx {
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struct fxp_rx *rx_next;
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struct mbuf *rx_mbuf;
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bus_dmamap_t rx_map;
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u_int32_t rx_addr;
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};
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struct fxp_tx {
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struct fxp_tx *tx_next;
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struct fxp_cb_tx *tx_cb;
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struct mbuf *tx_mbuf;
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bus_dmamap_t tx_map;
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};
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struct fxp_desc_list {
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struct fxp_rx rx_list[FXP_NRFABUFS];
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struct fxp_tx tx_list[FXP_NTXCB];
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struct fxp_tx mcs_tx;
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struct fxp_rx *rx_head;
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struct fxp_rx *rx_tail;
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struct fxp_tx *tx_first;
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struct fxp_tx *tx_last;
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struct fxp_rfa *rfa_list;
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struct fxp_cb_tx *cbl_list;
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u_int32_t cbl_addr;
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bus_dma_tag_t rx_tag;
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};
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/*
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* NOTE: Elements are ordered for optimal cacheline behavior, and NOT
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* for functional grouping.
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*/
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struct fxp_softc {
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struct arpcom arpcom; /* per-interface network data */
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struct resource *mem; /* resource descriptor for registers */
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int rtp; /* register resource type */
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int rgd; /* register descriptor in use */
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struct resource *irq; /* resource descriptor for interrupt */
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void *ih; /* interrupt handler cookie */
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struct mtx sc_mtx;
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bus_space_tag_t sc_st; /* bus space tag */
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bus_space_handle_t sc_sh; /* bus space handle */
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bus_dma_tag_t fxp_mtag; /* bus DMA tag for mbufs */
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bus_dma_tag_t fxp_stag; /* bus DMA tag for stats */
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bus_dmamap_t fxp_smap; /* bus DMA map for stats */
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bus_dma_tag_t cbl_tag; /* DMA tag for the TxCB list */
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bus_dmamap_t cbl_map; /* DMA map for the TxCB list */
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bus_dma_tag_t mcs_tag; /* DMA tag for the multicast setup */
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bus_dmamap_t mcs_map; /* DMA map for the multicast setup */
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bus_dmamap_t spare_map; /* spare DMA map */
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struct fxp_desc_list fxp_desc; /* descriptors management struct */
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int tx_queued; /* # of active TxCB's */
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int need_mcsetup; /* multicast filter needs programming */
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struct fxp_stats *fxp_stats; /* Pointer to interface stats */
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u_int32_t stats_addr; /* DMA address of the stats structure */
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int rx_idle_secs; /* # of seconds RX has been idle */
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struct callout stat_ch; /* stat callout */
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struct fxp_cb_mcs *mcsp; /* Pointer to mcast setup descriptor */
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u_int32_t mcs_addr; /* DMA address of the multicast cmd */
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struct ifmedia sc_media; /* media information */
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device_t miibus;
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device_t dev;
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int tunable_int_delay; /* interrupt delay value for ucode */
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int tunable_bundle_max; /* max # frames per interrupt (ucode) */
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int tunable_noflow; /* flow control disabled */
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int rnr; /* RNR events */
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int eeprom_size; /* size of serial EEPROM */
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int suspended; /* 0 = normal 1 = suspended or dead */
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int cu_resume_bug;
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int revision;
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int flags;
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u_int32_t saved_maps[5]; /* pci data */
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u_int32_t saved_biosaddr;
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u_int8_t saved_intline;
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u_int8_t saved_cachelnsz;
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u_int8_t saved_lattimer;
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u_int8_t rfa_size;
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u_int32_t tx_cmd;
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};
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#define FXP_FLAG_MWI_ENABLE 0x0001 /* MWI enable */
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#define FXP_FLAG_READ_ALIGN 0x0002 /* align read access with cacheline */
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#define FXP_FLAG_WRITE_ALIGN 0x0004 /* end write on cacheline */
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#define FXP_FLAG_EXT_TXCB 0x0008 /* enable use of extended TXCB */
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#define FXP_FLAG_SERIAL_MEDIA 0x0010 /* 10Mbps serial interface */
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#define FXP_FLAG_LONG_PKT_EN 0x0020 /* enable long packet reception */
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#define FXP_FLAG_ALL_MCAST 0x0040 /* accept all multicast frames */
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#define FXP_FLAG_CU_RESUME_BUG 0x0080 /* requires workaround for CU_RESUME */
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#define FXP_FLAG_UCODE 0x0100 /* ucode is loaded */
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#define FXP_FLAG_DEFERRED_RNR 0x0200 /* DEVICE_POLLING deferred RNR */
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#define FXP_FLAG_EXT_RFA 0x0400 /* extended RFDs for csum offload */
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#define FXP_FLAG_SAVE_BAD 0x0800 /* save bad pkts: bad size, CRC, etc */
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/* Macros to ease CSR access. */
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#define CSR_READ_1(sc, reg) \
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bus_space_read_1((sc)->sc_st, (sc)->sc_sh, (reg))
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#define CSR_READ_2(sc, reg) \
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bus_space_read_2((sc)->sc_st, (sc)->sc_sh, (reg))
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#define CSR_READ_4(sc, reg) \
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bus_space_read_4((sc)->sc_st, (sc)->sc_sh, (reg))
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#define CSR_WRITE_1(sc, reg, val) \
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bus_space_write_1((sc)->sc_st, (sc)->sc_sh, (reg), (val))
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#define CSR_WRITE_2(sc, reg, val) \
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bus_space_write_2((sc)->sc_st, (sc)->sc_sh, (reg), (val))
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#define CSR_WRITE_4(sc, reg, val) \
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bus_space_write_4((sc)->sc_st, (sc)->sc_sh, (reg), (val))
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#define sc_if arpcom.ac_if
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