From 100bd04d2d0642f99c0e4e77b2e93d732e47549a Mon Sep 17 00:00:00 2001 From: Geoffrey McRae Date: Sat, 31 Oct 2020 18:00:00 +1100 Subject: [PATCH] Initial module framework --- .gitignore | 7 + LICENSE | 340 +++++++++++++++++++++++++++++++++++++++ Makefile | 20 +++ README.md | 21 +++ userspace/vendor-reset | Bin 0 -> 17496 bytes userspace/vendor-reset.c | 22 +++ vendor-reset.c | 17 ++ 7 files changed, 427 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 Makefile create mode 100644 README.md create mode 100755 userspace/vendor-reset create mode 100644 userspace/vendor-reset.c create mode 100644 vendor-reset.c diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..8323ab7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,7 @@ +*.mod +*.mod.c +*.cmd +*.ko +*.o +*.symvers +*.order diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..3912109 --- /dev/null +++ b/LICENSE @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..a036920 --- /dev/null +++ b/Makefile @@ -0,0 +1,20 @@ +obj-m += vendor-reset.o +USER := $(shell whoami) +KVER ?= $(shell uname -r) +KDIR ?= /lib/modules/$(KVER)/build + +all: + make -C $(KDIR) M=$(PWD) modules + +clean: + make -C $(KDIR) M=$(PWD) clean + +userspace: + gcc userspace/vendor-reset.c -Wall -Werror -g -Og -o userspace/vendor-reset + +load: all + grep -q '^uio' /proc/modules || sudo modprobe uio + grep -q '^vendor-reset' /proc/modules && sudo rmmod vendor-reset || true + sudo insmod ./vendor-reset.ko + +.PHONY: userspace diff --git a/README.md b/README.md new file mode 100644 index 0000000..b8d6542 --- /dev/null +++ b/README.md @@ -0,0 +1,21 @@ +Vendor Reset + +The goal of this project is to provide a kernel module that is capable of +resetting hardware devices into a state where they can be re-initialized or +passed through into a virtual machine (VFIO). While it would be great to have +these in the kernel as PCI quirks, some of the reset procedures are very complex +and would never be accepted as a quirk (ie AMD Vega 10). + +By providing this as an out of tree kernel module, vendors will be able to +easily create pull requests to add functionallity to this module, and users will +be able to easily update this module without requiring a complete kernel rebuild. + +If you are a vendor intending to add support for your device to this project +please first consider two things: + +1. Can you fix your hardware/firmware to reset correctly using FLR or a BUS + reset? +2. Is the reset simple enough that it should really be a kernel pci quirk + (see: pci_quirk.c)? + +If you answer yes to either of these questions this project is not for you. diff --git a/userspace/vendor-reset b/userspace/vendor-reset new file mode 100755 index 0000000000000000000000000000000000000000..b6f57c7eaebc1094fe66b9d093ae6b1df158749e GIT binary patch literal 17496 zcmeHOYit}>6~43MwKq6fJ9a{xq>yPyz=3-0gf?#{yM83I$a&T&uO`#=?s&arAJOit zYlot?a$00smk6j3QW51Lfe=DGTB$z}O-R%~Ak=~c;ZfD9Qb-ZBY1N{lk}T)U+;1~8 zUQ^T`NR{SFJLjJ7p6@=+y)$#~&b{{xkL(L6ia=1s9>H3?-9h3q;o>eCArTkbMJrv` ziyK8V=}k7~q{kgWsZN*(d1XZ6DoN&jPp13j4bl!0HDt-W#X?`$Nr4oy9n7#_hy;Pvt}S)xzIB@fcgW8ZYe9A4KRuWXm??vfHbR+-l=dEJr+`6F2#B>c%f;ok+B zpI;798V5+W<#6~#E5q?7jkSexw*w1E@Qx6V>-oP1xc#UsZ!y1ImhFR-s_4z<#2v!@^5v+XzE{A2R&_9wfaIFf&% zfTi(Ix7t~E&GGCLaJql9S<@bn@$ z*K2(Pdtn&qsgyCEE2i?fQzoh8sI*bBQf131q;f^UI{Rs>*gujS7&NxTw#04`MsoCk zkul3=HdnFC^5}uVe5q)TrpEG|N48KZ$~+9mw4tG0AIF36qe33!dZNFpYjR82%Qwlo z<37N+)s{O6njGiA=Vb<3+(`!x{o-B+=e}a!Ak4dP)QQtByKwGzgexu_W1G|7bm8)m z0!knQ4+I_vJP>#w@Ic^!zypB?0uQ`vJ)qD0J)%Dtey&#t{rFLb0KoR-k#bm zFHll#<0ZPbt&3Ca7Ze*m1B1=~NX|ZcLZ5v>pSg79@aV`~cqdKA^|@ugB@2D7{~U?h z%1Pq9-nMSYhJH+nJ{SHziyd!TE2;Q{9H-)!)aKjP-OG8Omy)u$&$hqi6pKyQ^w}%= zxtI6q=iXFxI0 z&oczyI_X zk0)+V98a7`7*wWU&)a?C=>;x72!RIz4+I_vJP>#w@Ic^!zypB?0uKZp2s{vY;GKIw zp>K1_T6GtHzvOReH(aUJPLsTe7Oi$Ed#U@6v2*(N8D*I2#T`+rJn}M!OzXhojnD({Qx= zq3}?&?}27Lx_zc)e>8q)bbBJ&mxy)`M74ov7ugR)Blh>qpAr2I%E$e^k+Td!;DNvc zfd>K)1Re-H5O^T)K;VJE1AzzL%^twMOzgwNn#W#*QNxy^adMyLGO2$>?&n-Bb?o zqHxbHeSj{!DZ3FdbRQ)so#A|gbmdV-)w^tqD94p!wo8@HwH4MzMN?BaSF}VpGEI6o zat~dbmFBxi2xYmlG1}RxM%PA{D;+KEt7xZkOxe3yjqYsS)w-kgL#vaWoDlE&>cDEH zlL`t8q$N8;G!~jRh}PCUttvG;+(ywP88u5RN+lejpDKE}Eak1}GP>GlEof9I)rwiJ zoJ^%nAtudYrc~}Jn-$ZFrS1L9VMQzn!5eC)5>`9IN^@tZnX*Wgvy;4uT^roIP4Ydu-5=MeqIQ2+aVwpJU>tB8-F#ebizft1zK71SDipvjN9*05tDGmDNPQp2V zyuaC&!zBF_I*H=%-$w{qW5M`2Pq;$==K9CaucW=d zp3mF(!twl?ozKE?^(ZwUBo^L}5yCsjKWF3{irdMdiz1pG^ImSZ@rC2_X2RRWss-b- zgYb^f!uxa=jmB4!$CNqqS>(2o>%@AKAoZH(c+iU*^ zPNbjHubswKUmQ6&@(yVqm*Wus-G7U4w)fwUKa}=(RpE{QQ^L8Pe*32g*StmA+8+pC z-vAfsvQ@FFu5RNlx~rEccfp)gGpmu8Tq{Fa$XSt(Gi9|eoYJtx2nwsKB+k*)X0myxNIjEPh+!^gprhsY|ED;o65 zr{-L*2|I@Lu}Vc|V^0hWgHDsd8GOvF;n^|oxixRqM65Dhpm_;NtL(@L#Aq&OmQRXU zv1FOCY_S>}tLErbU@jw}#6Xg!G+AM%O{6LlB9@shQhtuK%1+88O}=uaqDL_(t!(B~ zOb{`^wWlZgybp*d7%z&H%VDc@8fm!?8X7UxV= z;*N@u14WF6Y=K51VdhvhOO#YGOXFLrx#D;U@zmH@*_?z%=OInR$w`gwp?84s8mWC{jVX@j72vHDaq}_%gVbOsrJp}U_&;flh4L{^ zghcsRS7N<~Y!6a|*O1_2J_&h78uIgw+YUa~hqn>NQ&aFU?}WrUl}zm5_umOZc?}6Z z=BJQ6zu%W{WHq`3K-V>G zDT?r1m+t`%n9t$dx8EK*klo)xh*UYJjmaZ4UavPk9j7})#Lm;#wU2_ z$A^i_T?{_fGZ%R+Podip^(*+0^OWM|i?}rHb0nS<60Q3W{Ff-f&By$(OY%`qKOg!l z6ydy3f6T+WB_HL$p38EF*GXYan%9%S_pgM&hrBBJb)t;ylNtK+1rPR13Gic_HYtgp zhoO{yTb|GRF*dy_`D1Ux|KK8gW3xl#KdaoqU)C1M_qX$L$>;mq9l&=>+`DeOPi%2C uT@GB0RL&CpiE+ix7xX*2BOPV@~FBvX7UttA@sAKB>;`h5hSD*gk*hCP1( literal 0 HcmV?d00001 diff --git a/userspace/vendor-reset.c b/userspace/vendor-reset.c new file mode 100644 index 0000000..ec9ef50 --- /dev/null +++ b/userspace/vendor-reset.c @@ -0,0 +1,22 @@ +/* +Vendor Reset - Vendor Specific Reset +Copyright (C) 2020 Geoffrey McRae + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; either version 2 of the License, or (at your option) any later +version. + +This program is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A +PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +int main(int argc, char * argv[]) +{ + return 0; +} diff --git a/vendor-reset.c b/vendor-reset.c new file mode 100644 index 0000000..ff1081e --- /dev/null +++ b/vendor-reset.c @@ -0,0 +1,17 @@ +/* +Vendor Reset - Vendor Specific Reset +Copyright (C) 2020 Geoffrey McRae + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; either version 2 of the License, or (at your option) any later +version. + +This program is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A +PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA +*/