linux_dsm_epyc7002/drivers
Yevgeny Petrilin e8f081aacd net/mlx4_core: Implement the master-slave communication channel
When SRIOV is enabled, pf and vfs communicate via shared comm channel.
The vf gets its side of the comm channel via a VF BAR.
Each VF (slave) creates its vHCR (virtual HCA Command Register),
Its DMA address is passed to the PF (master) using Communication Channel Register.
The same Register is used to notify the master of commands posted by the
slaves and for the master to pass events to the slaves, such as command completions
and asynchronous events.

The vHCR format is identical to the HCR format, except for the 'go' and 't' bits,
which are reserved in the vHCR. Posting commands to the vHCR is identical to
the way it is done with the HCR, albeit that the function/PF token fields are
used instead of the HCR go bit.
Specifically:
- When the function prepares a new command in the vHCR, it issues the Post_vHCR_cmd
  communication channel command and toggles the value of the function token;
  when PF token has an equal value, the command has been accepted and a new command may be posted.
- When the PF detects a Post_vHCR_cmd command, it concludes that a new command is available in the vHCR;
  after processing the command, the PF toggles the PF token to match the function token.

When the 'e' bit is not set, the completion of a Post_vHCR_cmd command also indicates
the completion the vHCR command. If, however, the 'e' bit is set, the completion of a
Post_vHCR_cmd command only indicates that the vHCR command has been accepted for execution by the PF.

Function commands are processed by the PF as follows:
-DMA (using the ACCESS_MEM command) the vHCR image into a shadow buffer.
-Validate that the opcode is non-privileged, and that the opcode- and input-modifiers are legal.
-DMA the in-box (if required) into a shadow buffer.
-Validate the command:
	o Resource ranges (e.g., QP ranges).
	o Partition key.
	o Ranges of referenced resources (e.g., CQs within QP contexts).
-If the 'e' bit is set
	o complete the Post_vHCR_cmd command
-Execute the command on the HCR.
-DMA the results to the vHCR out-box (if required).
-If the 'e' bit is set
	o Indicate command completion by generating a completion event using the GEN_EQE command
-Otherwise
	o DMA the command status to the vHCR
	o Complete the Post_vHCR_cmd command

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Yevgeny Petrillin <yevgenyp@mellanox.com>
Signed-off-by: Liran Liss <liranl@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-13 13:56:05 -05:00
..
accessibility
acpi pstore: pass allocated memory region back to caller 2011-11-17 12:58:07 -08:00
amba
ata libata: fix build without BMDMA 2011-11-17 02:11:42 -05:00
atm atm: eliminate atm_guess_pdu2truesize() 2011-11-26 16:40:30 -05:00
auxdisplay
base Merge branch 'driver-core-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core 2011-11-21 20:36:26 -08:00
bcma bcma: pci: use fixed windows when possible 2011-12-06 16:07:07 -05:00
block paride: fix potential information leak in pg_read() 2011-11-16 09:21:50 +01:00
bluetooth Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next 2011-12-06 16:02:05 -05:00
cdrom
char fix typo/thinko in get_random_bytes() 2011-11-17 11:42:54 -02:00
clk
clocksource Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
connector
cpufreq [CPUFREQ] db8500: fix build error due to undeclared i variable 2011-11-11 22:28:33 -05:00
cpuidle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2011-11-07 10:13:52 -08:00
crypto Merge git://github.com/herbertx/crypto 2011-11-25 21:55:07 -08:00
dca drivers/dca: Add export.h for THIS_MODULE to dca-sysfs.c 2011-10-31 19:31:43 -04:00
devfreq PM / devfreq: correct Kconfig dependency 2011-11-14 23:31:35 +01:00
dio
dma Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
edac drivers/edac/mpc85xx_edac.c: fix memory controller compatible for edac 2011-11-24 01:59:38 -06:00
eisa
firewire Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
firmware Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound 2011-12-02 08:10:51 -08:00
gpio gpio: fix a build failure on KS8695 GPIO 2011-12-05 15:30:33 -08:00
gpu vmwgfx: integer overflow in vmw_kms_update_layout_ioctl() 2011-12-02 10:49:41 +00:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2011-12-02 08:25:46 -08:00
hv
hwmon hwmon: convert drivers/hwmon/* to use module_platform_driver() 2011-11-26 09:48:20 -08:00
hwspinlock Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-08 18:34:16 -08:00
i2c Merge branch 'fixes' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git-cur/linux-2.6-arm 2011-12-01 11:53:54 -08:00
ide Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide 2011-11-18 22:04:12 -02:00
idle Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2011-11-07 10:13:52 -08:00
ieee802154 net: remove NETIF_F_NO_CSUM feature bit 2011-11-16 17:43:12 -05:00
infiniband mlx4_core: Add "native" argument to mlx4_cmd and its callers (where needed) 2011-12-13 13:56:05 -05:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2011-11-22 09:18:06 -08:00
iommu intr_remapping: Fix section mismatch in ir_dev_scope_init() 2011-12-05 18:22:53 +01:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-02 13:49:21 -05:00
leds Revert "leds: save the delay values after a successful call to blink_set()" 2011-11-15 22:41:50 -02:00
lguest enable virtio_net to return bus_info in ethtool -i consistent with emulated NICs 2011-11-16 17:26:46 -05:00
macintosh m68k/irq: Remove obsolete IRQ_FLG_* users 2011-11-08 22:35:48 +01:00
mca
md md/raid5: STRIPE_ACTIVE has lock semantics, add barriers 2011-11-08 16:22:06 +11:00
media Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media 2011-11-12 00:03:50 -02:00
memstick drivers/memstick: Add module.h to the prev. implicit modular users 2011-10-31 19:31:52 -04:00
message drivers/message: Add module.h to i2o/pci.c 2011-10-31 19:31:53 -04:00
mfd mfd: fix build failures in recently added ab5500 code 2011-11-07 21:45:14 -05:00
misc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-02 13:49:21 -05:00
mmc arm/imx: fix imx6q mmc error when mounting rootfs 2011-11-11 16:53:35 +01:00
mtd MTD: MAPS: bcm963xx-flash.c: explicitly include module.h 2011-11-07 21:26:55 -05:00
net net/mlx4_core: Implement the master-slave communication channel 2011-12-13 13:56:05 -05:00
nfc NFC: pn533: Staticise pn533_data_exchange() 2011-11-30 15:09:00 -05:00
nubus
of of/irq: of_irq_init: add check for parent equal to child node 2011-11-29 08:22:40 -06:00
oprofile Merge branch 'urgent' of git://amd64.org/linux/rric into perf/urgent 2011-11-15 11:03:30 +01:00
parisc parisc: add module.h to files really requiring it 2011-10-31 19:31:01 -04:00
parport
pci Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2011-11-23 14:58:46 -08:00
pcmcia Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
pinctrl pinctrl: hide subsystem from the populace 2011-11-10 09:02:12 +01:00
platform toshiba_acpi: Fix machines that don't support HCI_SYSTEM_EVENT 2011-12-05 13:07:28 -05:00
pnp Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2011-11-07 10:13:52 -08:00
power x86/mrst: Battery fixes 2011-12-05 17:06:37 +01:00
pps pps gpio client: add missing dependency 2011-11-02 16:07:02 -07:00
ps3 powerpc/ps3: irq: Remove IRQF_DISABLED 2011-11-08 14:51:46 +11:00
ptp
rapidio Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
regulator regulator: twl: fix twl4030 support for smps regulators 2011-11-28 18:58:31 +00:00
rtc Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2011-12-05 16:53:43 -08:00
s390 net: make vlan ndo_vlan_rx_[add/kill]_vid return error value 2011-12-08 19:52:37 -05:00
sbus
scsi cxgb4i: Handle dst_get_neighbour_noref() returning NULL. 2011-12-05 15:20:20 -05:00
sfi drivers/sfi: sfi_acpi.c needs sysfs.h 2011-10-31 19:31:57 -04:00
sh Merge branches 'sh/pm-runtime' and 'common/clkfwk' into sh-fixes-for-linus 2011-11-11 16:16:25 +09:00
sn
spi ARM: 7175/1: add subname parameter to mfp_set_groupg callers 2011-11-26 21:58:54 +00:00
ssb ssb: Add export.h to files using EXPORT_SYMBOL/THIS_MODULE 2011-10-31 19:32:08 -04:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging 2011-12-02 13:30:25 -08:00
target Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
tc
telephony
thermal thermal: Prevent polling from happening during system suspend 2011-11-06 20:38:49 -05:00
tty Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 2011-11-21 20:36:46 -08:00
uio uio: Add module.h to implicit drivers/uio users 2011-10-31 19:32:10 -04:00
usb Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-06 21:10:05 -05:00
uwb uwb: Add export.h for EXPORT_SYMBOL/THIS_MODULE as required 2011-10-31 19:32:19 -04:00
vhost
video viafb: correct sync polarity for OLPC DCON 2011-11-22 00:56:17 +00:00
virt
virtio Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-12-02 13:49:21 -05:00
vlynq
w1 Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
watchdog watchdog: fix initialisation printout in s3c2410_wdt 2011-11-16 22:04:17 +01:00
xen xen-gntalloc: signedness bug in add_grefs() 2011-11-16 12:13:48 -05:00
zorro drivers/zorro: Add export.h to proc.c 2011-10-31 19:32:01 -04:00
Kconfig
Makefile