AuxXxilium/linux_dsm_epyc7002
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74522a92bb
linux_dsm_epyc7002/drivers
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Chaitra P B 74522a92bb scsi: mpt3sas: Optimize I/O memory consumption in driver. 
For every IO, memory of PAGE size is allocated for handling NVMe native
PRPS. And in addition to that for every IO (chains need per IO * chain
buffer size, e.g. 38 * 128byte) amount of memory is allocated for chain
buffers.

However, at any point of time; the IO request can be for NVMe target
device (where PRP's page is used for framing PRP's) or can be for SCSI
target device (where chain buffers are used for framing chain
SGE's). This patch modifies the driver to reuse same pre-allocated PRP
page buffers as a chain buffer for IO's targeted for SCSI target
devices. No need to allocate separate buffers for chain SGE's buffers.

Suppose if the number of chain buffers need for IO doesn't fit in the
PRP Page size then driver maintain's separate buffers for those extra
chain buffers that exceeds the PRP page size. For example consider PRP
page size as 4K and chain buffer size as 128 bytes, then number of chain
buffers that can fit in PRP page is 4096/128 => 32. if the number of
chain buffer need per IO exceeds 32; for example consider number of
chains need per IO is 36 then for remaining 4 chain buffer's driver
allocates them individual.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2018-05-08 00:34:19 -04:00
..
accessibility
acpi xen: fixes for 4.17-rc1 2018-04-12 11:04:35 -07:00
amba
android
ata scsi: libsas: add transport class for ATA devices 2018-04-18 19:32:51 -04:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-04-01 19:49:34 -04:00
auxdisplay
base mm: check __highest_present_section_nr directly in memory_dev_init() 2018-04-11 10:28:31 -07:00
bcma
block for-linus-20180413 2018-04-13 15:15:15 -07:00
bluetooth Bluetooth: Set HCI_QUIRK_SIMULTANEOUS_DISCOVERY for BTUSB_QCA_ROME 2018-04-01 21:43:02 +03:00
bus pci-v4.17-changes 2018-04-06 18:31:06 -07:00
cdrom
char RTC for 4.17 2018-04-10 10:22:27 -07:00
clk The large diff this time around is from the addition of a new clk driver 2018-04-13 15:51:06 -07:00
clocksource ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
connector
cpufreq cpufreq: Drop cpufreq_table_validate_and_show() 2018-04-10 08:40:45 +02:00
cpuidle cpuidle: menu: Avoid selecting shallow states with stopped tick 2018-04-09 11:54:57 +02:00
crypto .gitignore: move *-asn1.[ch] patterns to the top-level .gitignore 2018-04-07 19:04:02 +09:00
dax libnvdimm for 4.17 2018-04-10 10:25:57 -07:00
dca
devfreq
dio
dma DMAengine updates for v4.17-rc1 2018-04-10 12:14:37 -07:00
dma-buf
edac * Add NVDIMM support to EDAC (Tony Luck) 2018-04-05 14:21:13 -07:00
eisa
extcon Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
firewire
firmware Merge branch 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2018-04-13 16:32:16 -07:00
fmc
fpga
fsi
gpio DeviceTree updates for 4.17: 2018-04-05 21:03:42 -07:00
gpu amdgpu, omap and snd regression fix 2018-04-12 20:56:10 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2018-04-05 11:53:34 -07:00
hsi
hv scsi: vmbus: Add function to report available ring buffer to write in total ring size percentage 2018-04-18 19:32:51 -04:00
hwmon hwmon updates for v4.17 2018-04-09 19:59:54 -07:00
hwspinlock
hwtracing Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
i2c i2c: add param sanity check to i2c_transfer() 2018-04-11 23:33:46 +02:00
ide for-4.17/block-20180402 2018-04-05 14:27:02 -07:00
idle
iio This is the bulk of GPIO changes for the v4.17 kernel cycle: 2018-04-05 09:51:41 -07:00
infiniband Merge candidates for 4.17 merge window 2018-04-06 17:35:43 -07:00
input Changes to chrome-platform for v4.17 2018-04-13 16:20:36 -07:00
iommu IOMMU Updates for Linux v4.17 2018-04-11 18:50:41 -07:00
ipack
irqchip IOMMU Updates for Linux v4.17 2018-04-11 18:50:41 -07:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-04-03 14:04:18 -07:00
leds
lightnvm lightnvm: pblk: remove some unnecessary NULL checks 2018-03-29 17:29:09 -06:00
macintosh powerpc updates for 4.17 2018-04-07 12:08:19 -07:00
mailbox
mcb
md libnvdimm for 4.17 2018-04-10 10:25:57 -07:00
media remoteproc updates for v4.17 2018-04-10 12:09:27 -07:00
memory
memstick
message scsi: mptfc: fix spelling mistake in macro names 2018-04-19 00:08:47 -04:00
mfd platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle 2018-04-10 22:25:07 -07:00
misc * Fix 2032 time access issues and new compiler warnings 2018-04-12 10:21:19 -07:00
mmc MMC core: 2018-04-12 10:59:03 -07:00
mtd This pull request contains updates for both UBI and UBIFS: 2018-04-11 16:39:34 -07:00
mux
net scsi: netvsc: Use the vmbus function to calculate ring buffer percentage 2018-04-18 19:32:52 -04:00
nfc
ntb
nubus
nvdimm libnvdimm for 4.17 2018-04-10 10:25:57 -07:00
nvme nvme: expand nvmf_check_if_ready checks 2018-04-12 09:58:27 -06:00
nvmem Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
of Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
opp
oprofile oprofilefs: don't oops on allocation failure 2018-03-29 15:07:48 -04:00
parisc parisc/pci: Switch LBA PCI bus from Hard Fail to Soft Fail mode 2018-03-27 18:52:22 +02:00
parport Char/Misc patches for 4.17-rc1 2018-04-04 20:07:20 -07:00
pci PCI: Remove messages about reassigning resources 2018-04-11 08:46:50 -05:00
pcmcia Merge branch 'for-linus-sa1100' of git://git.armlinux.org.uk/~rmk/linux-arm 2018-04-09 09:26:36 -07:00
perf ARM: SoC driver updates for 4.17 2018-04-05 21:29:35 -07:00
phy ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
pinctrl This is the bulk of GPIO changes for the v4.17 kernel cycle: 2018-04-05 09:51:41 -07:00
platform Changes to chrome-platform for v4.17 2018-04-13 16:20:36 -07:00
pnp
power ARM: SoC platform updates for 4.17 2018-04-05 21:21:08 -07:00
powercap
pps
ps3
ptp
pwm pwm: Changes for v4.17-rc1 2018-04-13 15:46:21 -07:00
rapidio rapidio: use a reference count for struct mport_dma_req 2018-04-11 10:28:37 -07:00
ras
regulator Merge remote-tracking branches 'regulator/topic/88pg86x', 'regulator/topic/dt', 'regulator/topic/formatting' and 'regulator/topic/gpio' into regulator-next 2018-03-28 10:33:53 +08:00
remoteproc remoteproc: fix null pointer dereference on glink only platforms 2018-04-05 22:53:16 -07:00
reset
rpmsg rpmsg: smd: Use announce_create to process any receive work 2018-03-27 21:54:37 -07:00
rtc RTC for 4.17 2018-04-10 10:22:27 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-13 09:43:20 -07:00
sbus sparc64: Properly range check DAX completion index 2018-04-01 20:07:00 -04:00
scsi scsi: mpt3sas: Optimize I/O memory consumption in driver. 2018-05-08 00:34:19 -04:00
sfi
sh
siox
slimbus
sn
soc The large diff this time around is from the addition of a new clk driver 2018-04-13 15:51:06 -07:00
soundwire
spi spi: SPI updates for v4.17 2018-04-03 12:06:21 -07:00
spmi
ssb
staging page cache: use xa_lock 2018-04-11 10:28:39 -07:00
target scsi: target: target_core_user.[ch]: convert comments into DOC: 2018-04-20 19:14:39 -04:00
tc
tee
thermal Merge branches 'thermal-core' and 'thermal-soc' into next 2018-04-13 14:11:53 +08:00
thunderbolt
tty Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2018-04-09 09:04:10 -07:00
uio
usb Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2018-04-07 11:11:41 -07:00
uwb
vfio VFIO updates for v4.17-rc1 2018-04-06 19:44:27 -07:00
vhost vhost: return bool from *_access_ok() functions 2018-04-11 10:54:06 -04:00
video fbdev changes for v4.17: 2018-04-10 10:20:00 -07:00
virt
virtio virtio: feature 2018-04-11 18:58:27 -07:00
visorbus
vlynq
vme
w1
watchdog linux-watchdog 4.17-rc1 merge window tag 2018-04-13 15:43:50 -07:00
xen xen: fixes for 4.17-rc1 2018-04-12 11:04:35 -07:00
zorro
Kconfig hwtracing: Add HW tracing support menu 2018-03-29 13:38:10 +03:00
Makefile