linux.git/drivers/mailbox/ti-msgmgr.c, branch v6.0

mailbox: ti-msgmgr: Operate mailbox in polled mode during system suspend

2022-03-13T01:33:30+00:00

During the system suspend path we must set all queues to operate in
polled mode as it is possible for any protocol built using this mailbox,
such as TISCI, to require communication during the no irq phase of suspend,
and we cannot rely on interrupts there.

Polled mode is implemented by allowing the mailbox user to define an
RX channel as part of the message that is sent which is what gets polled
for a response. If polled mode is enabled, this will immediately be
polled for a response at the end of the mailbox send_data op before
returning success for the data send or timing out if no response is
received.

Finally, to ensure polled mode is always enabled during system suspend,
iterate through all queues to set RX queues to polled mode during system
suspend and disable polled mode for all in the resume handler.

Signed-off-by: Dave Gerlach 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Refactor message read during interrupt handler

2022-03-13T01:33:23+00:00

Refactor the portion of code that actually reads received messages from
a queue into its own function, ti_msgmgr_queue_rx_data, that is called
by the interrupt handler instead of reading directly from the handler.

Signed-off-by: Dave Gerlach 
Signed-off-by: Jassi Brar

mailbox: fix various typos in comments

2021-04-14T01:07:35+00:00

Fix trivial typos in mailbox driver comments.

s/Intergrated/Integrated/
s/extenstion/extension/
s/atleast/at least/
s/commnunication/communication/
s/assgined/assigned/
s/commnunication/communication/
s/recevied/received/
s/succeded/succeeded/
s/implmentation/implementation/
s/definiation/definition/
s/traget/target/
s/wont/won't/

Cc: trivial@kernel.org
Signed-off-by: Tom Saeger 
Reviewed-by: Randy Dunlap 
Signed-off-by: Jassi Brar

mailbox: Replace HTTP links with HTTPS ones

2020-08-04T04:24:43+00:00

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Use device-managed registration API

2018-12-21T22:49:26+00:00

Get rid of some boilerplate driver removal code by using the newly added
device-managed registration API.

Signed-off-by: Thierry Reding 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Off by one in ti_msgmgr_of_xlate()

2018-12-12T02:32:45+00:00

The > comparison should be >= or we access one element beyond the end
of the array.

(The inst->qinsts[] array is allocated in the ti_msgmgr_probe() function
and it has ->num_valid_queues elements.)

Fixes: a2b79838b891 ("mailbox: ti-msgmgr: Add support for Secure Proxy")
Signed-off-by: Dan Carpenter 
Acked-by: Nishanth Menon 
Signed-off-by: Jassi Brar

mailbox: Convert to using %pOFn instead of device_node.name

2018-09-29T07:12:38+00:00

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Signed-off-by: Rob Herring 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Add support for Secure Proxy

2018-08-03T13:27:41+00:00

Secure Proxy is another communication scheme in Texas Instrument's
devices intended to provide an unique communication path from various
processors in the System on Chip(SoC) to a central System Controller.

Secure proxy is, in effect, an evolution of current generation Message
Manager hardware block found in K2G devices. However the following
changes have taken place:

Secure Proxy instance exposes "threads" or "proxies" which is
primary representation of "a" communication channel. Each thread is
preconfigured by System controller configuration based on SoC usage
requirements. Secure proxy by itself represents a single "queue" of
communication but allows the proxies to be independently operated.

Each Secure proxy thread can uniquely have their own error and threshold
interrupts allowing for more fine control of IRQ handling.

Provide the driver support for Secure Proxy and thread instances.

NOTE: Secure proxy configuration is only done by System Controller,
hence these are assumed to be pre-configured instances.

See AM65x Technical Reference Manual (SPRUID7, April 2018)
for further details: http://www.ti.com/lit/pdf/spruid7

Signed-off-by: Nishanth Menon 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Move the memory region name to descriptor

2018-08-03T13:27:41+00:00

For newer generation of the hardware, the naming of the region is
decided at integration level and there could be additional regions
as well. Hence move the region naming to be described from compatible
descriptor.

Signed-off-by: Nishanth Menon 
Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Change message count mask to be descriptor based

2018-08-03T13:27:41+00:00

Change mask used to extract the message count to be descriptor based.

This is to support changes for count location for various SoC
solutions.

Signed-off-by: Nishanth Menon 
Signed-off-by: Jassi Brar