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da28723ecd
o Add CTASSERTs ensuring that HME_NRXDESC and HME_NTXDESC are set to
legal values.
o Use appropriate maxsize, nsegments and maxsegsize parameters when
creating DMA tags and correct some comments related to them.
o The FreeBSD bus_dmamap_sync(9) supports ored together flags for quite
some time now so collapse calls accordingly.
o Add missing BUS_DMASYNC_PREREAD when syncing the control DMA maps in
hme_rint() and hme_start_locked().
o Keep state of the link state and use it to enable or disable the MAC
in hme_mii_statchg() accordingly as well as to return early from
hme_start_locked() in case the link is down.
o Introduce a sc_flags and use it to replace individual members like
sc_pci.
o Add bus_barrier(9) calls to hme_mac_bitflip(), hme_mii_readreg(),
hme_mii_writereg() and hme_stop() to ensure the respective bit
has been written before we starting polling on it and for the right
bits to change.
o Rather just returning in case hme_mac_bitflip() fails and leaving us
in an undefined state report the problem and move on; chances are
the requested configuration will become active shortly after.
o Don't call hme_start_locked() in hme_init_locked() unconditionally
but only after calls to hme_init_locked() when it's appropriate, i.e.
in hme_watchdog().
o Add a KASSERT which asserts nsegs is valid also to hme_load_txmbuf().
o In hme_load_txmbuf():
- use a maximum of the newly introduced HME_NTXSEGS segments instead
of the incorrect HME_NTXQ, which reflects the maximum TX queue
length, for loading the mbufs and put the DMA segments back onto
the stack instead of the softc as 16 should be ok there.
- use the common errno(2) return values instead of homegrown ones,
- given that hme_load_txmbuf() is allowed to fail resulting in a
packet drop for quite some time now implement the functionality of
hme_txcksum() by means of m_pullup(9), which de-obfuscates the code
and allows to always retrieve the correct length of the IP header, [1]
- also add a KASSERT which asserts nsegs is valid,
- take advantage of m_collapse(9) instead of m_defrag(9) for
performance reasons.
o Don't bother to check whether the interface is running or whether its
queue is empty before calling hme_start_locked() in hme_tint(), the
former will check these anyway.
o In hme_intr() call hme_rint() before hme_tint() as gem_tint() may
take quite a while to return when it calls hme_start_locked().
o Get rid of sc_debug and just check if_flags for IFF_DEBUG directly.
o Add a shadow sc_ifflags so we don't reset the chip when unnecessary.
o Handle IFF_ALLMULTI correctly. [2]
o Use PCIR_BAR instead of a homegrown macro.
o Replace sc_enaddr[6] with sc_enaddr[ETHER_ADDR_LEN].
o Use the maximum of 256 TX descriptors for better performance as using
all of them has no additional static cost rather than using just half
of them.
Reported by: rwatson [2]
Suggested by: yongari [1]
Reviewed by: yongari
MFC after: 1 month
317 lines
15 KiB
C
317 lines
15 KiB
C
/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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, this list of conditions and the following 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* from: NetBSD: hmereg.h,v 1.16 2003/11/02 11:07:45 wiz Exp
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*
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* $FreeBSD$
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*/
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/*
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* HME Shared Ethernet Block register offsets
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*/
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#define HME_SEBI_RESET (0*4)
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#define HME_SEBI_CFG (1*4)
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#define HME_SEBI_STAT (64*4)
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#define HME_SEBI_IMASK (65*4)
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/* HME SEB bits. */
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#define HME_SEB_RESET_ETX 0x00000001 /* reset external transmitter */
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#define HME_SEB_RESET_ERX 0x00000002 /* reset external receiver */
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#define HME_SEB_CFG_BURSTMASK 0x00000003 /* covers all burst bits */
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#define HME_SEB_CFG_BURST16 0x00000000 /* 16 byte bursts */
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#define HME_SEB_CFG_BURST32 0x00000001 /* 32 byte bursts */
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#define HME_SEB_CFG_BURST64 0x00000002 /* 64 byte bursts */
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#define HME_SEB_CFG_64BIT 0x00000004 /* extended transfer mode */
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#define HME_SEB_CFG_PARITY 0x00000008 /* parity check for DVMA/PIO */
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#define HME_SEB_STAT_GOTFRAME 0x00000001 /* frame received */
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#define HME_SEB_STAT_RCNTEXP 0x00000002 /* rx frame count expired */
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#define HME_SEB_STAT_ACNTEXP 0x00000004 /* align error count expired */
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#define HME_SEB_STAT_CCNTEXP 0x00000008 /* crc error count expired */
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#define HME_SEB_STAT_LCNTEXP 0x00000010 /* length error count expired */
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#define HME_SEB_STAT_RFIFOVF 0x00000020 /* rx fifo overflow */
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#define HME_SEB_STAT_CVCNTEXP 0x00000040 /* code violation counter exp */
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#define HME_SEB_STAT_STSTERR 0x00000080 /* xif sqe test failed */
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#define HME_SEB_STAT_SENTFRAME 0x00000100 /* frame sent */
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#define HME_SEB_STAT_TFIFO_UND 0x00000200 /* tx fifo underrun */
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#define HME_SEB_STAT_MAXPKTERR 0x00000400 /* max-packet size error */
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#define HME_SEB_STAT_NCNTEXP 0x00000800 /* normal collision count exp */
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#define HME_SEB_STAT_ECNTEXP 0x00001000 /* excess collision count exp */
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#define HME_SEB_STAT_LCCNTEXP 0x00002000 /* late collision count exp */
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#define HME_SEB_STAT_FCNTEXP 0x00004000 /* first collision count exp */
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#define HME_SEB_STAT_DTIMEXP 0x00008000 /* defer timer expired */
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#define HME_SEB_STAT_RXTOHOST 0x00010000 /* pkt moved from rx fifo->memory */
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#define HME_SEB_STAT_NORXD 0x00020000 /* out of receive descriptors */
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#define HME_SEB_STAT_RXERR 0x00040000 /* rx DMA error */
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#define HME_SEB_STAT_RXLATERR 0x00080000 /* late error during rx DMA */
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#define HME_SEB_STAT_RXPERR 0x00100000 /* parity error during rx DMA */
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#define HME_SEB_STAT_RXTERR 0x00200000 /* tag error during rx DMA */
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#define HME_SEB_STAT_EOPERR 0x00400000 /* tx descriptor did not set EOP */
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#define HME_SEB_STAT_MIFIRQ 0x00800000 /* mif needs attention */
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#define HME_SEB_STAT_HOSTTOTX 0x01000000 /* pkt moved from memory->tx fifo */
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#define HME_SEB_STAT_TXALL 0x02000000 /* all pkts in fifo transmitted */
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#define HME_SEB_STAT_TXEACK 0x04000000 /* error during tx DMA */
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#define HME_SEB_STAT_TXLERR 0x08000000 /* late error during tx DMA */
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#define HME_SEB_STAT_TXPERR 0x10000000 /* parity error during tx DMA */
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#define HME_SEB_STAT_TXTERR 0x20000000 /* tag error durig tx DMA */
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#define HME_SEB_STAT_SLVERR 0x40000000 /* pio access error */
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#define HME_SEB_STAT_SLVPERR 0x80000000 /* pio access parity error */
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#define HME_SEB_STAT_BITS "\177\020" \
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"b\0GOTFRAME\0b\1RCNTEXP\0b\2ACNTEXP\0" \
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"b\3CCNTEXP\0b\4LCNTEXP\0b\5RFIFOVF\0" \
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"b\6CVCNTEXP\0b\7STSTERR\0b\10SENTFRAME\0" \
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"b\11TFIFO_UND\0b\12MAXPKTERR\0b\13NCNTEXP\0" \
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"b\14ECNTEXP\0b\15LCCNTEXP\0b\16FCNTEXP\0" \
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"b\17DTIMEXP\0b\20RXTOHOST\0b\21NORXD\0" \
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"b\22RXERR\0b\23RXLATERR\0b\24RXPERR\0" \
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"b\25RXTERR\0b\26EOPERR\0b\27MIFIRQ\0" \
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"b\30HOSTTOTX\0b\31TXALL\0b\32XTEACK\0" \
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"b\33TXLERR\0b\34TXPERR\0b\35TXTERR\0" \
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"b\36SLVERR\0b\37SLVPERR\0\0"
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#define HME_SEB_STAT_ALL_ERRORS \
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(HME_SEB_STAT_SLVPERR | HME_SEB_STAT_SLVERR | HME_SEB_STAT_TXTERR |\
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HME_SEB_STAT_TXPERR | HME_SEB_STAT_TXLERR | HME_SEB_STAT_TXEACK |\
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HME_SEB_STAT_EOPERR | HME_SEB_STAT_RXTERR | HME_SEB_STAT_RXPERR |\
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HME_SEB_STAT_RXLATERR | HME_SEB_STAT_RXERR | HME_SEB_STAT_NORXD |\
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HME_SEB_STAT_MAXPKTERR| HME_SEB_STAT_TFIFO_UND| HME_SEB_STAT_STSTERR |\
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HME_SEB_STAT_RFIFOVF)
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#define HME_SEB_STAT_VLAN_ERRORS \
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(HME_SEB_STAT_SLVPERR | HME_SEB_STAT_SLVERR | HME_SEB_STAT_TXTERR |\
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HME_SEB_STAT_TXPERR | HME_SEB_STAT_TXLERR | HME_SEB_STAT_TXEACK |\
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HME_SEB_STAT_EOPERR | HME_SEB_STAT_RXTERR | HME_SEB_STAT_RXPERR |\
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HME_SEB_STAT_RXLATERR | HME_SEB_STAT_RXERR | HME_SEB_STAT_NORXD |\
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HME_SEB_STAT_TFIFO_UND| HME_SEB_STAT_STSTERR | HME_SEB_STAT_RFIFOVF)
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#define HME_SEB_STAT_FATAL_ERRORS \
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(HME_SEB_STAT_SLVPERR | HME_SEB_STAT_SLVERR | HME_SEB_STAT_TXTERR |\
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HME_SEB_STAT_TXPERR | HME_SEB_STAT_TXLERR | HME_SEB_STAT_TXEACK |\
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HME_SEB_STAT_RXTERR | HME_SEB_STAT_RXPERR | HME_SEB_STAT_RXLATERR |\
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HME_SEB_STAT_RXERR)
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/*
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* HME Transmitter register offsets
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*/
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#define HME_ETXI_PENDING (0*4) /* Pending/wakeup */
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#define HME_ETXI_CFG (1*4)
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#define HME_ETXI_RING (2*4) /* Descriptor Ring pointer */
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#define HME_ETXI_BBASE (3*4) /* Buffer base address (ro) */
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#define HME_ETXI_BDISP (4*4) /* Buffer displacement (ro) */
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#define HME_ETXI_FIFO_WPTR (5*4) /* FIFO write pointer */
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#define HME_ETXI_FIFO_SWPTR (6*4) /* FIFO shadow write pointer */
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#define HME_ETXI_FIFO_RPTR (7*4) /* FIFO read pointer */
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#define HME_ETXI_FIFO_SRPTR (8*4) /* FIFO shadow read pointer */
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#define HME_ETXI_FIFO_PKTCNT (9*4) /* FIFO packet counter */
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#define HME_ETXI_STATEMACHINE (10*4) /* State machine */
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#define HME_ETXI_RSIZE (11*4) /* Ring size */
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#define HME_ETXI_BPTR (12*4) /* Buffer pointer */
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/* TXI_PENDING bits */
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#define HME_ETX_TP_DMAWAKEUP 0x00000001 /* Start tx (rw, auto-clear) */
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/* TXI_CFG bits */
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#define HME_ETX_CFG_DMAENABLE 0x00000001 /* Enable TX DMA */
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#define HME_ETX_CFG_FIFOTHRESH 0x000003fe /* TX fifo threshold */
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#define HME_ETX_CFG_IRQDAFTER 0x00000400 /* Intr after tx-fifo empty */
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#define HME_ETX_CFG_IRQDBEFORE 0x00000000 /* Intr before tx-fifo empty */
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/*
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* HME Receiver register offsets
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*/
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#define HME_ERXI_CFG (0*4)
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#define HME_ERXI_RING (1*4) /* Descriptor Ring pointer */
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#define HME_ERXI_BPTR (2*4) /* Data Buffer pointer (ro) */
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#define HME_ERXI_FIFO_WPTR (3*4) /* FIFO write pointer */
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#define HME_ERXI_FIFO_SWPTR (4*4) /* FIFO shadow write pointer */
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#define HME_ERXI_FIFO_RPTR (5*4) /* FIFO read pointer */
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#define HME_ERXI_FIFO_PKTCNT (6*4) /* FIFO packet counter */
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#define HME_ERXI_STATEMACHINE (7*4) /* State machine */
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/* RXI_CFG bits */
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#define HME_ERX_CFG_DMAENABLE 0x00000001 /* Enable RX DMA */
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#define HME_ERX_CFG_FBO_MASK 0x00000038 /* RX first byte offset */
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#define HME_ERX_CFG_FBO_SHIFT 0x00000003
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#define HME_ERX_CFG_RINGSIZE32 0x00000000 /* Descriptor ring size: 32 */
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#define HME_ERX_CFG_RINGSIZE64 0x00000200 /* Descriptor ring size: 64 */
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#define HME_ERX_CFG_RINGSIZE128 0x00000400 /* Descriptor ring size: 128 */
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#define HME_ERX_CFG_RINGSIZE256 0x00000600 /* Descriptor ring size: 256 */
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#define HME_ERX_CFG_RINGSIZEMSK 0x00000600 /* Descriptor ring size: 256 */
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#define HME_ERX_CFG_CSUMSTART_MASK 0x007f0000 /* cksum offset mask */
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#define HME_ERX_CFG_CSUMSTART_SHIFT 16
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/*
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* HME MAC-core register offsets
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*/
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#define HME_MACI_XIF (0*4)
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#define HME_MACI_TXSWRST (130*4) /* TX reset */
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#define HME_MACI_TXCFG (131*4) /* TX config */
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#define HME_MACI_JSIZE (139*4) /* TX jam size */
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#define HME_MACI_TXSIZE (140*4) /* TX max size */
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#define HME_MACI_NCCNT (144*4) /* TX normal collision cnt */
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#define HME_MACI_FCCNT (145*4) /* TX first collision cnt */
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#define HME_MACI_EXCNT (146*4) /* TX excess collision cnt */
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#define HME_MACI_LTCNT (147*4) /* TX late collision cnt */
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#define HME_MACI_RANDSEED (148*4) /* */
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#define HME_MACI_RXSWRST (194*4) /* RX reset */
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#define HME_MACI_RXCFG (195*4) /* RX config */
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#define HME_MACI_RXSIZE (196*4) /* RX max size */
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#define HME_MACI_MACADDR2 (198*4) /* MAC address */
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#define HME_MACI_MACADDR1 (199*4)
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#define HME_MACI_MACADDR0 (200*4)
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#define HME_MACI_HASHTAB3 (208*4) /* Address hash table */
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#define HME_MACI_HASHTAB2 (209*4)
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#define HME_MACI_HASHTAB1 (210*4)
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#define HME_MACI_HASHTAB0 (211*4)
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#define HME_MACI_AFILTER2 (212*4) /* Address filter */
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#define HME_MACI_AFILTER1 (213*4)
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#define HME_MACI_AFILTER0 (214*4)
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#define HME_MACI_AFILTER_MASK (215*4)
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/* XIF config register. */
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#define HME_MAC_XIF_OE 0x00000001 /* Output driver enable */
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#define HME_MAC_XIF_XLBACK 0x00000002 /* Loopback-mode XIF enable */
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#define HME_MAC_XIF_MLBACK 0x00000004 /* Loopback-mode MII enable */
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#define HME_MAC_XIF_MIIENABLE 0x00000008 /* MII receive buffer enable */
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#define HME_MAC_XIF_SQENABLE 0x00000010 /* SQE test enable */
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#define HME_MAC_XIF_SQETWIN 0x000003e0 /* SQE time window */
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#define HME_MAC_XIF_LANCE 0x00000010 /* Lance mode enable */
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#define HME_MAC_XIF_LIPG0 0x000003e0 /* Lance mode IPG0 */
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/* Transmit config register. */
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#define HME_MAC_TXCFG_ENABLE 0x00000001 /* Enable the transmitter */
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#define HME_MAC_TXCFG_SMODE 0x00000020 /* Enable slow transmit mode */
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#define HME_MAC_TXCFG_CIGN 0x00000040 /* Ignore transmit collisions */
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#define HME_MAC_TXCFG_FCSOFF 0x00000080 /* Do not emit FCS */
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#define HME_MAC_TXCFG_DBACKOFF 0x00000100 /* Disable backoff */
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#define HME_MAC_TXCFG_FULLDPLX 0x00000200 /* Enable full-duplex */
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#define HME_MAC_TXCFG_DGIVEUP 0x00000400 /* Don't give up on transmits */
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/* Receive config register. */
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#define HME_MAC_RXCFG_ENABLE 0x00000001 /* Enable the receiver */
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#define HME_MAC_RXCFG_PSTRIP 0x00000020 /* Pad byte strip enable */
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#define HME_MAC_RXCFG_PMISC 0x00000040 /* Enable promiscuous mode */
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#define HME_MAC_RXCFG_DERR 0x00000080 /* Disable error checking */
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#define HME_MAC_RXCFG_DCRCS 0x00000100 /* Disable CRC stripping */
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#define HME_MAC_RXCFG_ME 0x00000200 /* Receive packets addressed to me */
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#define HME_MAC_RXCFG_PGRP 0x00000400 /* Enable promisc group mode */
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#define HME_MAC_RXCFG_HENABLE 0x00000800 /* Enable the hash filter */
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#define HME_MAC_RXCFG_AENABLE 0x00001000 /* Enable the address filter */
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/*
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* HME MIF register offsets
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*/
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#define HME_MIFI_BB_CLK (0*4) /* bit-bang clock */
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#define HME_MIFI_BB_DATA (1*4) /* bit-bang data */
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#define HME_MIFI_BB_OE (2*4) /* bit-bang output enable */
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#define HME_MIFI_FO (3*4) /* frame output */
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#define HME_MIFI_CFG (4*4) /* */
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#define HME_MIFI_IMASK (5*4) /* Interrupt mask for status change */
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#define HME_MIFI_STAT (6*4) /* Status (ro, auto-clear) */
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#define HME_MIFI_SM (7*4) /* State machine (ro) */
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/* MIF Configuration register */
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#define HME_MIF_CFG_PHY 0x00000001 /* PHY select */
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#define HME_MIF_CFG_PE 0x00000002 /* Poll enable */
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#define HME_MIF_CFG_BBMODE 0x00000004 /* Bit-bang mode */
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#define HME_MIF_CFG_PRADDR 0x000000f8 /* Poll register address */
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#define HME_MIF_CFG_MDI0 0x00000100 /* MDI_0 (ro) */
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#define HME_MIF_CFG_MDI1 0x00000200 /* MDI_1 (ro) */
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#define HME_MIF_CFG_PPADDR 0x00007c00 /* Poll phy address */
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/* MIF Frame/Output register */
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#define HME_MIF_FO_ST 0xc0000000 /* Start of frame */
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#define HME_MIF_FO_ST_SHIFT 30 /* */
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#define HME_MIF_FO_OPC 0x30000000 /* Opcode */
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#define HME_MIF_FO_OPC_SHIFT 28 /* */
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#define HME_MIF_FO_PHYAD 0x0f800000 /* PHY Address */
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#define HME_MIF_FO_PHYAD_SHIFT 23 /* */
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#define HME_MIF_FO_REGAD 0x007c0000 /* Register Address */
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#define HME_MIF_FO_REGAD_SHIFT 18 /* */
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#define HME_MIF_FO_TAMSB 0x00020000 /* Turn-around MSB */
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#define HME_MIF_FO_TALSB 0x00010000 /* Turn-around LSB */
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#define HME_MIF_FO_DATA 0x0000ffff /* data to read or write */
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/* Wired HME PHY addresses */
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#define HME_PHYAD_INTERNAL 1
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#define HME_PHYAD_EXTERNAL 0
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/*
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* Buffer Descriptors.
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*/
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#define HME_XD_SIZE 8
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#define HME_XD_FLAGS(base, index) ((base) + ((index) * HME_XD_SIZE) + 0)
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#define HME_XD_ADDR(base, index) ((base) + ((index) * HME_XD_SIZE) + 4)
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#define HME_XD_GETFLAGS(p, b, i) \
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((p) ? le32toh(*((u_int32_t *)HME_XD_FLAGS(b,i))) : \
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(*((u_int32_t *)HME_XD_FLAGS(b,i))))
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#define HME_XD_SETFLAGS(p, b, i, f) do { \
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*((u_int32_t *)HME_XD_FLAGS(b,i)) = ((p) ? htole32((f)) : (f)); \
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} while(/* CONSTCOND */ 0)
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#define HME_XD_SETADDR(p, b, i, a) do { \
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*((u_int32_t *)HME_XD_ADDR(b,i)) = ((p) ? htole32((a)) : (a)); \
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} while(/* CONSTCOND */ 0)
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/* Descriptor flag values */
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#define HME_XD_OWN 0x80000000 /* ownership: 1=hw, 0=sw */
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#define HME_XD_SOP 0x40000000 /* start of packet marker (tx) */
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#define HME_XD_OFL 0x40000000 /* buffer overflow (rx) */
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#define HME_XD_EOP 0x20000000 /* end of packet marker (tx) */
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#define HME_XD_TXCKSUM 0x10000000 /* checksum enable (tx) */
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#define HME_XD_RXLENMSK 0x3fff0000 /* packet length mask (rx) */
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#define HME_XD_RXLENSHIFT 16
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#define HME_XD_TXLENMSK 0x00003fff /* packet length mask (tx) */
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#define HME_XD_TXCKSUM_SSHIFT 14
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#define HME_XD_TXCKSUM_OSHIFT 20
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#define HME_XD_RXCKSUM 0x0000ffff /* packet checksum (rx) */
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/* Macros to encode/decode the receive buffer size from the flags field */
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#define HME_XD_ENCODE_RSIZE(sz) \
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(((sz) << HME_XD_RXLENSHIFT) & HME_XD_RXLENMSK)
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#define HME_XD_DECODE_RSIZE(flags) \
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(((flags) & HME_XD_RXLENMSK) >> HME_XD_RXLENSHIFT)
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/* Provide encode/decode macros for the transmit buffers for symmetry */
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#define HME_XD_ENCODE_TSIZE(sz) \
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(((sz) << 0) & HME_XD_TXLENMSK)
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#define HME_XD_DECODE_TSIZE(flags) \
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(((flags) & HME_XD_TXLENMSK) >> 0)
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#define HME_MINRXALIGN 0x10
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#define HME_RXOFFS 2
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