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0617522889
freebsd-skq/sys/pci
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Andrew Gallatin 0617522889 Fix an alpha-only race which causes the transmit side of the chip to 
lock up under moderate to heavy load.

The status & command fields share a 32-bit longword.  The programming
API of the eepro apparently requires that you update the command field
of a transmit slot that you've already given to the card.  This means
the card could be updating the status field of the same longword at
the same time. Since alphas can only operate on 32-bit chunks of
memory, both the status & command fields are loaded from memory &
operated on in registers when the following line of C is executed:

                sc->cbl_last->cb_command &= ~FXP_CB_COMMAND_S;

The race is caused by the card DMA'ing up the status at just the wrong
time -- after it has been loaded into a register & before it has been
written back.  The old value of the status is written back, clobbering
the status the card just DMA'ed up. The fact that the card has sent
this frame is missed & the transmit engine appears to hang.

Luckily, as numerous people on the freebsd-alpha list pointed out, the
load-locked/store-conditional instructions used by the atomic
functions work with respect changes in memory due to I/O devices.  We
now use them to safely update the command field.

Tested by: Bernd Walter <ticso@mail.cicely.de>
2000-07-19 14:33:52 +00:00
..
agp_ali.c A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
agp_amd.c Release resources properly in detach. 2000-06-10 17:53:20 +00:00
agp_i810.c Add support for Intel's i810 chipset with integrated graphics. An 2000-07-12 10:13:07 +00:00
agp_if.m A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
agp_intel.c A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
agp_sis.c A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
agp_via.c A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
agp.c Add support for Intel's i810 chipset with integrated graphics. An 2000-07-12 10:13:07 +00:00
agppriv.h Add support for Intel's i810 chipset with integrated graphics. An 2000-07-12 10:13:07 +00:00
agpreg.h Add support for Intel's i810 chipset with integrated graphics. An 2000-07-12 10:13:07 +00:00
agpvar.h A driver for programming the AGP hardware. This is only very lightly 2000-06-09 16:04:30 +00:00
alpm.c Remove ~25 unneeded #include <sys/conf.h> 2000-04-19 14:58:28 +00:00
amd.c Remove ~25 unneeded #include <sys/conf.h> 2000-04-19 14:58:28 +00:00
amd.h Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
cy_pci.c Ahhrggg. Put the test for the compat shims AFTER the file that includes 2000-03-27 20:24:02 +00:00
cy_pcireg.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
dc21040reg.h s/Id/FreeBSD/ 1999-08-09 12:52:49 +00:00
ide_pcireg.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
if_ar_p.c Ahhrggg. Put the test for the compat shims AFTER the file that includes 2000-03-27 20:24:02 +00:00
if_dc.c Add the PCI IDs for the Macronix 98727 and 98732 parts. These are 2000-07-17 19:27:41 +00:00
if_dcreg.h Add the PCI IDs for the Macronix 98727 and 98732 parts. These are 2000-07-17 19:27:41 +00:00
if_de.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_devar.h Use bus_space for all register accesses. 2000-05-13 18:47:24 +00:00
if_en_pci.c Ahhrggg. Put the test for the compat shims AFTER the file that includes 2000-03-27 20:24:02 +00:00
if_fxp.c Fix an alpha-only race which causes the transmit side of the chip to 2000-07-19 14:33:52 +00:00
if_fxpreg.h Added support for the i82559ER (10/100Mbps NIC for embedded applications). 2000-06-18 10:26:09 +00:00
if_fxpvar.h Added support for cards and on-motherboard NICs that use an SEEPROM 2000-03-28 04:41:42 +00:00
if_mn.c Newbusify this driver at an expense of 40 extra lines of code. 2000-07-10 19:33:41 +00:00
if_rl.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_rlreg.h Make some tweaks to the RealTek driver: 1999-10-21 19:42:03 +00:00
if_sf.c Close PR# 19904: remember to call sf_setmulti() when initializing the 2000-07-14 19:11:02 +00:00
if_sfreg.h Modify the Adaptec "starfire" driver to reset the PHY on the MII bus 1999-12-05 20:02:45 +00:00
if_sis.c sis_miibus_writereg() was checking for SIS_TYPE_900 and phy != 0 twice 2000-07-14 05:30:48 +00:00
if_sisreg.h Add support for the National Semiconductor DP83815 fast ethernet 2000-07-06 06:02:04 +00:00
if_sk.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_skreg.h Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
if_sr_p.c Ahhrggg. Put the test for the compat shims AFTER the file that includes 2000-03-27 20:24:02 +00:00
if_ste.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_stereg.h Spruce up the Sundance ST201 driver: 1999-12-07 20:14:42 +00:00
if_ti.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_tireg.h Back out the previous change to the queue(3) interface. 2000-05-26 02:09:24 +00:00
if_tl.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_tlreg.h Make some small performance tweaks to the tl driver. This should hopefully 1999-09-19 22:39:24 +00:00
if_tx.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_txvar.h Added support for SMC9432BTX cards. 2000-06-21 19:19:49 +00:00
if_vr.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_vrreg.h Close PR# 19617: add support for VIA VT6102 NICs to VIA Rhine driver. 2000-07-05 21:37:21 +00:00
if_wb.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_wbreg.h Convert the Adaptec and Winbond drivers to miibus. 1999-08-30 23:08:32 +00:00
if_wx.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_wxreg.h Fix this driver to (finally) work with switches. Some more black 2000-06-16 06:28:31 +00:00
if_wxvar.h Fix this driver to (finally) work with switches. Some more black 2000-06-16 06:28:31 +00:00
if_xl.c Make all Ethernet drivers attach using ether_ifattach() and detach using 2000-07-13 22:54:34 +00:00
if_xlreg.h Update the xl driver to recognize yet another 3c905B/3c905C class NIC: 1999-12-16 18:33:57 +00:00
intpm.c Fix some leakage from inside #ifdef PCI_COMPAT (the FreeBSD 2.2 compat 2000-05-28 16:17:18 +00:00
intpmreg.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
isp_pci.c Keep interrupts blocked for all of isp_pci_attach. Redo DMA routines 2000-07-18 06:40:22 +00:00
locate.pl use warnings 2000-06-27 22:41:12 +00:00
meteor_reg.h Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
meteor.c Ahhrggg. Put the test for the compat shims AFTER the file that includes 2000-03-27 20:24:02 +00:00
ncr.c ncr.c is no longer a COMPAT_OLDPCI device - remove the warning. 2000-05-28 10:45:06 +00:00
ncrreg.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
ohci_pci.c Only display the 'Disable PNP-OS BIOS option' message on the i386 arch. 2000-05-11 20:17:28 +00:00
pccbb.c Initial import of cardbus bridge driver (cbb) from the latest 1999-11-18 07:14:54 +00:00
pccbbreg.h Initial import of cardbus bridge driver (cbb) from the latest 1999-11-18 07:14:54 +00:00
pccbbvar.h Initial import of cardbus bridge driver (cbb) from the latest 1999-11-18 07:14:54 +00:00
pci_compat.c Encapsulate the old PCI compatability support and APIs completely under 2000-05-28 16:35:57 +00:00
pci_if.m * Factor out the object system from new-bus so that it can be used by 2000-04-08 14:17:18 +00:00
pci.c Nuke the useless chip driver. It gets in the way when you want to load 2000-06-09 16:00:29 +00:00
pcic_p.c Make this compile without depending on the FreeBSD 2.2 compatability 2000-05-28 16:31:35 +00:00
pcic_p.h Make this compile without depending on the FreeBSD 2.2 compatability 2000-05-28 16:31:35 +00:00
pcireg.h Encapsulate the old PCI compatability support and APIs completely under 2000-05-28 16:35:57 +00:00
pcisupport.c Nuke the useless chip driver. It gets in the way when you want to load 2000-06-09 16:00:29 +00:00
pcivar.h Nuke the useless chip driver. It gets in the way when you want to load 2000-06-09 16:00:29 +00:00
scsiiom.c Add $FreeBSD$ 2000-05-01 20:32:07 +00:00
simos.c Separate the struct bio related stuff out of <sys/buf.h> into 2000-05-05 09:59:14 +00:00
simos.h $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
ti_fw2.h Update the Tigon firmware to 12.3.21. This fixes a few bugs and adds support 2000-04-24 17:44:45 +00:00
ti_fw.h Update the Tigon firmware to 12.3.21. This fixes a few bugs and adds support 2000-04-24 17:44:45 +00:00
uhci_pci.c Add 440MX chipset. 2000-05-24 02:24:38 +00:00
xmaciireg.h Reoganize/update the SysKonnect driver: 2000-04-22 02:16:41 +00:00
xrpu.c Do not depend on FreeBSD 2.2 compatability defines. 2000-05-28 16:18:58 +00:00