Commits · topic-fastmodels_mainline-20190726 · linux-arm / linux-power

Jul 23, 2019

mailbox: arm_mhu: Updated MHUv2 AMBA ID to 0xbb0d1 · 349b36b2

Samarth Parikh authored Dec 04, 2017 and

Douglas Raillard committed Jul 23, 2019

Updated MHUv2 AMBA ID to 0xbb0d1 from 0x4b0d1 as per the
latest change in MHUv2 specification and FVP models.

JIRA ID:
	https://jira.arm.com/browse/PLATFORMS-1389
	https://jira.arm.com/browse/PLATFORMS-1508



Change-Id: I2ee6e686e848c358e11ced9e023e76122139a015
Signed-off-by: Samarth Parikh <samarth.parikh@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>

349b36b2

mailbox: arm_mhu: add support for mhuv2 · 4a2af8d9

Samarth Parikh authored Oct 24, 2017 and

Douglas Raillard committed Jul 23, 2019

ARM has launched a next version of MHU i.e. MHUv2 with its latest
subsystems. The major changes that have gone into MHUv2 are,
MHUv2 now have two separate physical channels for Secure & Non-Secure
communications with two dedicated channels each for send & receive.
So, in all MHUv2 have total of 4 physical channels instead of 1 which
was shared across all the communications in case of older version of
MHU.

Also, with MHUv2 the non-secure communication happens over either High
priority channel (N=0) or Low priority channel (N=1) which has an offset
of 0x0 or 0x20 respectively. For, secure communication it still uses
single channel (N=0) which has an offset of 0x0. MHUv2 can support
upto 32 (N=31) sub-channels each having a width of 0x20 across secure
& non-secure channel. Base offset of any sub-channel N = (N * 0x20).

0x0  0x20  0x40               0x1000
---------------------....-----
| SE |    |    |    |        |
---------------------....-----
   Secure Transmit Channel

0x0  0x20  0x40               0x1000
---------------------....-----
| SE |    |    |    |        |
---------------------....-----
    Secure Receive Channel

0x0  0x20  0x40               0x1000
---------------------....-----
| HP | LP |    |    |        |
---------------------....-----
  Non-Secure Transmit Channel

0x0  0x20  0x40               0x1000
---------------------....-----
| HP | LP |    |    |        |
---------------------....-----
  Non-Secure Receive Channel

The register offsets have also changed for STAT, SET & CLEAR registers
from 0x0, 0x8 & 0x10 in MHUv1 to 0x0, 0xC & 0x8 in MHUv2 respectively.

0x0    0x4  0x8  0xC             0x1F
------------------------....-----
| STAT |    |    | SET |    |   |
------------------------....-----
      Transmit Channel

0x0    0x4  0x8   0xC            0x1F
------------------------....-----
| STAT |    | CLR |    |    |   |
------------------------....-----
        Receive Channel

With MHUv2, the receiver can be put to sleep by the MHU controller
in order to save power. So, in order for the receiver to be
awake when the sender wants to send data, the sender has to set
ACCESS_REQUEST register first in order to wake-up receiver if it was
asleep, state of which can be detected using ACCESS_READY register.
ACCESS_REQUEST has an offset of 0xF88 & ACCESS_READY has an offset
of 0xF8C and are accessible only on any transmit channel.

This patch adds necessary changes required to support the older
version of MHU & the latest MHUv2 controller. This patch also updates
DT binding for ARM MHU as we need a compatible string as
arm,mhuv2-doorbell for differentiating MHUv2 DT and also added second
register base (tx base) which would be used as the send channel base
for non-secure channels. (If the kernel is running in secure mode then
the same tx base address can be used as the send channel base register
for secure channel too.)

JIRA: https://jira.arm.com/browse/PLATFORMS-826
JIRA: https://jira.arm.com/browse/PLATFORMS-1026
JIRA: https://jira.arm.com/browse/PLATFORMS-1508



Change-Id: I62868dc94ea8ae1ec105db1e3edf4e5bbbff5ae1
Signed-off-by: Samarth Parikh <samarth.parikh@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>

4a2af8d9

mailbox: arm_mhu: add support to read and record mbox-name · 7aeb46d2

Sudeep Holla authored May 02, 2017 and

Douglas Raillard committed Jul 23, 2019



It's sometimes useful to identify the mailbox controller with the name
as specified in the devicetree via mbox-name property especially in a
system with multiple controllers.

This patch adds support to read and record the mailbox controller name.

Change-Id: I50cf79bf3b68b2f74d38c29337db30e125fa2e87
Cc: Alexey Klimov <alexey.klimov@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

7aeb46d2

mailbox: arm_mhu: add full support for the doorbells · 41c7ea04

Sudeep Holla authored May 02, 2017 and

Douglas Raillard committed Jul 23, 2019



We now have the basic infrastructure and binding to support doorbells
on ARM MHU controller.

This patch adds all the necessary mailbox operations to add support for
the doorbells. Maximum of 32 doorbells are supported on each physical
channel, however the total number of doorbells is restricted to 20
in order to save memory. It can increased if required in future.

Change-Id: I9788b68bdae97c60d5573c97d2057e531b0f3ba8
Cc: Alexey Klimov <alexey.klimov@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

41c7ea04

mailbox: arm_mhu: re-factor data structure to add doorbell support · af5ee195

Sudeep Holla authored May 02, 2017 and

Douglas Raillard committed Jul 23, 2019



In order to support doorbells, we need a bit of reword around data
structures that are per-channel. Since the number of doorbells are
not fixed though restricted to maximum of 20, the channel assignment
and initialization is move to xlate function.

This patch also adds the platform data for the existing support of one
channel per physical channel.

Change-Id: I8d699c7dcca2a6e272a39582b06a29c14a7e3a62
Cc: Alexey Klimov <alexey.klimov@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

af5ee195

mailbox: arm_mhu: migrate to threaded irq handler · 1a2c7e5a

Sudeep Holla authored May 02, 2017 and

Douglas Raillard committed Jul 23, 2019



In preparation to introduce support for doorbells which require the
interrupt handlers to be threaded, this patch moves the existing
interrupt handler to threaded handler.

Also it moves out the registering and freeing of the handlers from
the mailbox startup and shutdown methods. This also is required to
support doorbells.

Change-Id: I8d7d826fa3b169cdccf7673ea94d7edb4af91c88
Cc: Alexey Klimov <alexey.klimov@arm.com>
Cc: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

1a2c7e5a

arm: Use common outgoing-CPU-notification code · e49f1467

Paul E. McKenney authored May 12, 2015 and

Douglas Raillard committed Jul 23, 2019

This commit removes the open-coded CPU-offline notification with new
common code. In particular, this change avoids calling scheduler code
using RCU from an offline CPU that RCU is ignoring. This is a minimal
change. A more intrusive change might invoke the cpu_check_up_prepare()
and cpu_set_state_online() functions at CPU-online time, which would
allow onlining throw an error if the CPU did not go offline properly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Russell King <linux@arm.linux.org.uk>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>

e49f1467

dts: hikey960: Fix bootwarning on mapping reboot reason syscon · f72f0131
John Stultz authored May 16, 2018 and Douglas Raillard committed Jul 23, 2019
```
Signed-off-by: John Stultz <john.stultz@linaro.org>
```
topic-hikey960_mainline-20190726

f72f0131
reset: hisi-reboot: adb reboot bootloader · bce9153b
Chen Feng authored Feb 06, 2017 and Douglas Raillard committed Jul 23, 2019
```
Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
```
bce9153b

arm64: dts: hi3660: adb reboot node · f6b7910b

Chen Jun authored Feb 06, 2017 and

Douglas Raillard committed Jul 23, 2019



Add "hisilicon,hi3660-reboot" node for hi3660.

Eventually when we've transitioned to UEFI this can be dropped.
As we can then use syscon-reboot-mode.

Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Chen Jun <chenjun14@huawei.com>

f6b7910b

arm64: defconfig: Add USB support for HiKey960 · b9c95a69
Valentin Schneider authored Feb 19, 2019 and Douglas Raillard committed Jul 23, 2019
```
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
```
b9c95a69