Ethernet Drivers: Question on Sending Received Packets to the FreeBSD Network Stack

Hi All, While sending the Received Ethernet Frames (non - LRO case) to the FreeBSD Network Stack via (struct ifnet *)->if_input((struct ifnet *), (struct *mbuf)); Is it possible to send multiple Ethernet Frames in a single invocation of the above callback function? In other words should (struct

Increasing TCP Window Size in FreeBSD.

I have been using iperf in server mode to do some performance analysis. I was trying to increase the Receive TCP Window Size via sysctl net.inet.tcp.recvspace= I noticed that I could increase it atmost to 128Kbytes (131072). Any value above 128k, results in a failure to get the requested window

RE: FreeBSD_HEAD_i386 - Build #2847 - Still Failing

Hi All, I would appreciate if you could let me know how to back off the following commits. https://svnweb.freebsd.org/changeset/base/297916 https://svnweb.freebsd.org/changeset/base/297909 https://svnweb.freebsd.org/changeset/base/297898 I tried the following but it fails: cd svn me

RoCE v2 on FreeBSD

Hi All, Does FreeBSD support RoCE v2 ? Thanks David S. ___ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"

Recommended methods to upgrade firmware on HBAs

Hi All, 1. What is the current recommended method for upgrading firmware for HBAs? 2. Is there a mechanism wherein the firmware binary can be provided as a separate file, which is then made accessible to the corresponding device driver during device initialization? 3. Is the

Choosing between DELAY(useconds) and pause()

It appears that the pause() function cannot be used in driver functions which are invoked early in the boot process. Is there is a kernel api which a device driver can use to determine whether to use pause() or DELAY(), for delays which are say greater than 10hz - may be even 1 hz ? Cheers, Dav

TSO and FreeBSD

Is there an upper limit on a transmit packet size, which has CSUM_TSO bit set in the mp->m_pkthdr.csum_flags field. Browsing the code I thought it was 65535 bytes. However at least on Freebsd 7.x, I am occasionally noticing that the driver is asked to transmit packets which are 65536 and 65537 b

Question on TSO/LSO Transmit Frames

Hi All, Is it safe to assume that when a driver receives an Ethernet frame to transmit with CSUM_TSO bit set in m_head->m_pkthdr.csum_flags ; where m_head is the first (struct mbuf) in the mbuf chain that the [Ethernet Header] + [VLAN Tag if present] + [IP Header] + [TCP Header] are all pre

iSCSI Target For Freebsd

Hi All, Is there are an iSCSI Software Target that you can recommend. I have tried using istgt ( on Freebsd7.2) with Windows iSCSI Software Initiator. The initiator is able to discover the target however it is unable to login to the target. The login Response shows that the = <0203> indicatin

Ethernet Drivers: Question on ifp->if_ioctl invocation for SIOCADDMULTI and SIOCDELMULTI

Hi All, When ifp->if_ioctl() is invoked for the ioctl cmd SIOCADDMULTI, IN_MULTI_LOCK() is called in one of the functions in_joingroup() in the caller stack. >From netinet/in_var.h, line 357 : #define IN_MULTI_LOCK() >mtx_lock(&in_multi_mtx) >From netinet/in_mcast.c 1098 in_joi

Questions on LRO and Delayed ACK

Hi All, 1. If there is hardware support for LRO, (where the hardware delivers coalesces a bunch of consecutive TCP segments into one large TCP Segment), is it enough for the driver to simply post the segment to the host stack via ifp->if_input() ? I mean is there a need to run thru tcp_l

Setting up a running FreeBSD/PCBSD system to enter kgdb on panic

Hi All, Is there some way I can setup a running FreeBSD - (I use PCBSD7.2) - to break into kgdb when the system panics. I am trying to get a stack trace when "Fatal trap 12: page fault while in kernel mode" happens. thanks david S. This message and any attached d

Loading drivers via kldload

Hi All, While loading PCIe based HBA drivers via kldload, does FreeBSD expect a valid (i.e., non-zero) PCI subsystem Vendor and Device IDs? Thanks, David Somayajulu This message and any attached documents contain information from QLogic Corporation or its

RE: Loading drivers via kldload

e = KMOD=qltest SRCS=qla_os.c SRCS+= device_if.h bus_if.h pci_if.h clean: rm -f opt_bdg.h device_if.h bus_if.h pci_if.h export_syms rm -f *.o *.kld *.ko rm -f @ machine .include Thanks david S. -Original Message----- From: Stanislav Sedov [m

RE: Loading drivers via kldload

Please see below. -david S. -Original Message- From: Andriy Gapon [mailto:a...@freebsd.org] Sent: Tuesday, August 16, 2011 9:26 AM To: John Baldwin Cc: David Somayajulu; freebsd-current@freebsd.org Subject: Re: Loading drivers via kldload The following are pure speculations, I'd r