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Benjamin Herrenschmidt 9f4a8a2d7f fsi/sbefifo: Add driver for the SBE FIFO 
This driver provides an in-kernel and a user API for accessing
the command FIFO of the SBE (Self Boot Engine) of the POWER9
processor, via the FSI bus.

It provides an in-kernel interface to submit command and receive
responses, along with a helper to locate and analyse the response
status block. It's a simple synchronous submit() type API.

The user interface uses the write/read interface that an earlier
version of this driver already provided, however it has some
specific limitations in order to keep the driver simple and
avoid using up a lot of kernel memory:

 - The user should perform a single write() with the command and
   a single read() to get the response (with a buffer big enough
   to hold the entire response).

 - On a write() the command is simply "stored" into a kernel buffer,
   it is submitted as one operation on the subsequent read(). This
   allows to have the code write directly from the FIFO into the user
   buffer and avoid hogging the SBE between the write() and read()
   syscall as it's critical that the SBE be freed asap to respond
   to the host. An extra write() will simply replace the previously
   written command.

 - A write of a single 4 bytes containing the value 0x52534554
   in big endian will trigger a reset request. No read is necessary,
   the write() call will return when the reset has been acknowledged
   or times out.

 - The command is limited to 4K bytes.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Tested-by: Joel Stanley <joel@jms.id.au>
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 		2018-06-12 14:05:39 +10:00
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accessibility
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acpi libnvdimm for 4.18 2018-06-08 17:21:52 -07:00
amba Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-06-06 13:49:25 -07:00
android
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ata SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
atm atm: zatm: fix memcmp casting 2018-05-29 09:59:53 -04:00
auxdisplay
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base arm64 updates for 4.18: 2018-06-08 11:10:58 -07:00
bcma dma-mapping updates for 4.18: 2018-06-04 10:58:12 -07:00
block for-linus-20180608 2018-06-08 13:36:19 -07:00
bluetooth Bluetooth: btusb: Add additional device ID for RTL8822BE 2018-05-30 15:45:01 +02:00
bus ARM: SoC driver updates 2018-06-11 18:15:22 -07:00
cdrom
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char Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2018-06-09 11:14:30 -07:00
clk This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
clocksource This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
connector Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
cpufreq ARM: SoC driver updates 2018-06-11 18:15:22 -07:00
cpuidle powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-06-05 15:51:21 -07:00
dax libnvdimm for 4.18 2018-06-08 17:21:52 -07:00
dca
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devfreq
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dio
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dma dmaengine updates for 4.18-rc1 2018-06-08 11:02:21 -07:00
dma-buf
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edac
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eisa
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extcon
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firewire treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
firmware ARM: SoC: late updates 2018-06-11 18:19:45 -07:00
fmc
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fpga fpga: clarify that unregister functions also free 2018-05-25 18:23:56 +02:00
fsi fsi/sbefifo: Add driver for the SBE FIFO 2018-06-12 14:05:39 +10:00
gpio This is the bulk of GPIO changes for the v4.18 development 2018-06-08 10:31:52 -07:00
gpu msm next, i915, vc4, v3d fixes 2018-06-11 07:17:36 -07:00
hid Merge branch 'for-4.18/wacom' into for-linus 2018-06-08 10:28:24 +02:00
hsi
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hv SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
hwmon powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
hwspinlock hwspinlock updates for v4.18 2018-06-11 12:09:19 -07:00
hwtracing Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
i2c USB/PHY patches for 4.18-rc1 2018-06-05 16:14:12 -07:00
ide ide: don't enable/disable interrupts in force threaded-IRQ mode 2018-06-05 16:26:47 -04:00
idle
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iio Staging/IIO patches for 4.18-rc1 2018-06-09 10:32:39 -07:00
infiniband 4.18 Merge window pull request 2018-06-07 13:04:07 -07:00
input - New Device Support 2018-06-11 07:20:17 -07:00
iommu Revert "iommu/amd_iommu: Use CONFIG_DMA_DIRECT_OPS=y and dma_direct_{alloc,free}()" 2018-06-11 12:22:12 -07:00
ipack
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irqchip irqchip/ls-scfg-msi: Map MSIs in the iommu 2018-06-06 12:05:19 +02:00
isdn Merge branch 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-06-04 13:57:43 -07:00
leds
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lightnvm lightnvm: pblk: fix resource leak of invalid_bitmap 2018-06-05 09:20:27 -06:00
macintosh powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
mailbox - Remove HAS_DMA config dependencies 2018-06-07 13:35:59 -07:00
mcb
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md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2018-06-09 12:01:36 -07:00
media ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
memory memory: tegra: Changes for v4.18-rc1 2018-05-25 05:14:34 -07:00
memstick
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message SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
mfd - New Device Support 2018-06-11 07:20:17 -07:00
misc pci-v4.18-changes 2018-06-07 12:45:58 -07:00
mmc MMC core: 2018-06-05 16:11:43 -07:00
mtd ARM: SoC platform updates 2018-06-11 17:49:09 -07:00
mux
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net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-06-10 19:25:23 -07:00
nfc NFC: pn533: don't send USB data off of the stack 2018-05-31 12:43:14 +02:00
ntb
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nubus Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
nvdimm Merge branch 'for-4.18/mcsafe' into libnvdimm-for-next 2018-06-08 15:16:44 -07:00
nvme for-linus-20180608 2018-06-08 13:36:19 -07:00
nvmem
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of ARM: SoC: late updates 2018-06-11 18:19:45 -07:00
opp OPP: Allow same OPP table to be used for multiple genpd 2018-05-30 15:38:21 +05:30
oprofile
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parisc dma-mapping updates for 4.18: 2018-06-04 10:58:12 -07:00
parport
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pci pci-v4.18-changes 2018-06-07 12:45:58 -07:00
pcmcia
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perf drivers/bus: arm-cci: fix build warnings 2018-05-29 16:38:16 +01:00
phy Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
pinctrl This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
platform - New Device Support 2018-06-11 07:20:17 -07:00
pnp media updates for v4.18-rc1 2018-06-07 12:34:37 -07:00
power power supply and reset changes for the v4.18 series 2018-06-09 12:11:09 -07:00
powercap
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pps
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ps3
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ptp ptp_qoriq: move some definitions to header file 2018-05-28 23:05:11 -04:00
pwm pwm: stm32: Initialize raw local variables 2018-06-04 07:13:40 +01:00
rapidio
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ras
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regulator regulator: Updates for v4.18 2018-06-08 13:08:57 -07:00
remoteproc remoteproc: q6v5: Allow defining GLINK edge for mss remoteproc 2018-05-29 20:10:34 -07:00
reset ARM: SoC driver updates 2018-06-11 18:15:22 -07:00
rpmsg rpmsg: smd: do not use mananged resources for endpoints and channels 2018-06-04 12:35:03 -07:00
rtc - New Device Support 2018-06-11 07:20:17 -07:00
s390 SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
sbus
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scsi SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
sfi
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sh
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siox
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slimbus
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sn
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soc ARM: SoC: late updates 2018-06-11 18:19:45 -07:00
soundwire Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
spi Power management updates for 4.18-rc1 2018-06-05 09:38:39 -07:00
spmi
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ssb
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staging - Core Frameworks 2018-06-11 07:23:19 -07:00
target SCSI misc on 20180610 2018-06-10 13:01:12 -07:00
tc
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tee
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thermal - Introduce arithmetic overflow test helper functions (Rasmus) 2018-06-06 17:27:14 -07:00
thunderbolt
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tty powerpc updates for 4.18 2018-06-07 10:23:33 -07:00
uio
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usb - Introduce arithmetic overflow test helper functions (Rasmus) 2018-06-06 17:27:14 -07:00
uwb
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vfio Merge branch 'work.aio-1' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-06-04 13:57:43 -07:00
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-06-06 18:39:49 -07:00
video - Core Frameworks 2018-06-11 07:23:19 -07:00
virt
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virtio
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visorbus
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vlynq
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vme
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w1 Char/Misc driver patches for 4.18-rc1 2018-06-05 16:20:22 -07:00
watchdog watchdog: da9063: remove duplicated timeout_to_sel calls 2018-06-07 12:41:43 +02:00
xen xen: fixes and features for v4-18-rc1 2018-06-08 09:24:54 -07:00
zorro - Introduce arithmetic overflow test helper functions (Rasmus) 2018-06-06 17:27:14 -07:00
Kconfig
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Makefile
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