515d4440fe
recompiling the driver. See the comments near the top of "if_em.h"
for descriptions of these delays. Four new loader tunables control
the system-wide default values:
hw.em.tx_int_delay
hw.em.rx_int_delay
hw.em.tx_abs_int_delay
hw.em.rx_abs_int_delay
The tunables are specified in microseconds. The valid range is
0-67108 usec., and 0 means that the timer is disabled.
There are also four new sysctls (actually, a set of four for each
"em" device in the system) to query and change the interrupt delays
after the system is up:
hw.em0.tx_int_delay
hw.em0.rx_int_delay
hw.em0.tx_abs_int_delay (not present for 82542/3/4 adapters)
hw.em0.rx_abs_int_delay (not present for 82542/3/4 adapters)
It seems to be OK to change these values even while the adapter is
passing traffic.
Approved by: Prafulla Deuskar <pdeuskar@FreeBSD.ORG>
MFC after: 4 weeks
125 lines
4.4 KiB
C
125 lines
4.4 KiB
C
/**************************************************************************
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Copyright (c) 2001-2003, Intel Corporation
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All rights reserved.
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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 are met:
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1. Redistributions of source code must retain the above copyright notice,
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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. Neither the name of the Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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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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/*$FreeBSD$*/
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#ifndef _FREEBSD_OS_H_
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#define _FREEBSD_OS_H_
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/clock.h>
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#define ASSERT(x) if(!(x)) panic("EM: x")
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/* The happy-fun DELAY macro is defined in /usr/src/sys/i386/include/clock.h */
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#define usec_delay(x) DELAY(x)
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#define msec_delay(x) DELAY(1000*(x))
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#define MSGOUT(S, A, B) printf(S "\n", A, B)
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#define DEBUGFUNC(F) DEBUGOUT(F);
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#if DBG
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#define DEBUGOUT(S) printf(S "\n")
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#define DEBUGOUT1(S,A) printf(S "\n",A)
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#define DEBUGOUT2(S,A,B) printf(S "\n",A,B)
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#define DEBUGOUT3(S,A,B,C) printf(S "\n",A,B,C)
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#define DEBUGOUT7(S,A,B,C,D,E,F,G) printf(S "\n",A,B,C,D,E,F,G)
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#else
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#define DEBUGOUT(S)
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#define DEBUGOUT1(S,A)
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#define DEBUGOUT2(S,A,B)
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#define DEBUGOUT3(S,A,B,C)
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#define DEBUGOUT7(S,A,B,C,D,E,F,G)
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#endif
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#define FALSE 0
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#define TRUE 1
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#define CMD_MEM_WRT_INVALIDATE 0x0010 /* BIT_4 */
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#define PCI_COMMAND_REGISTER PCIR_COMMAND
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struct em_osdep
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{
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bus_space_tag_t mem_bus_space_tag;
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bus_space_handle_t mem_bus_space_handle;
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struct device *dev;
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};
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#define E1000_WRITE_FLUSH(hw) E1000_READ_REG(hw, STATUS)
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/* Read from an absolute offset in the adapter's memory space */
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#define E1000_READ_OFFSET(hw, offset) \
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bus_space_read_4( ((struct em_osdep *)(hw)->back)->mem_bus_space_tag, \
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((struct em_osdep *)(hw)->back)->mem_bus_space_handle, \
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offset)
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/* Write to an absolute offset in the adapter's memory space */
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#define E1000_WRITE_OFFSET(hw, offset, value) \
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bus_space_write_4( ((struct em_osdep *)(hw)->back)->mem_bus_space_tag, \
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((struct em_osdep *)(hw)->back)->mem_bus_space_handle, \
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offset, \
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value)
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/* Convert a register name to its offset in the adapter's memory space */
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#define E1000_REG_OFFSET(hw, reg) \
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((hw)->mac_type >= em_82543 ? E1000_##reg : E1000_82542_##reg)
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#define E1000_READ_REG(hw, reg) \
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E1000_READ_OFFSET(hw, E1000_REG_OFFSET(hw, reg))
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#define E1000_WRITE_REG(hw, reg, value) \
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E1000_WRITE_OFFSET(hw, E1000_REG_OFFSET(hw, reg), value)
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#define E1000_READ_REG_ARRAY(hw, reg, index) \
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E1000_READ_OFFSET(hw, E1000_REG_OFFSET(hw, reg) + ((index) << 2))
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#define E1000_WRITE_REG_ARRAY(hw, reg, index, value) \
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E1000_WRITE_OFFSET(hw, E1000_REG_OFFSET(hw, reg) + ((index) << 2), value)
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#endif /* _FREEBSD_OS_H_ */
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