From: Marc Bonnici <Marc.Bonnici@arm.com>
To: Sudeep Holla <Sudeep.Holla@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Cc: Sudeep Holla <Sudeep.Holla@arm.com>,
Trilok Soni <tsoni@codeaurora.org>,
"arve@android.com" <arve@android.com>,
Andrew Walbran <qwandor@google.com>,
David Hartley <dhh@qti.qualcomm.com>,
Achin Gupta <Achin.Gupta@arm.com>,
Jens Wiklander <jens.wiklander@linaro.org>,
Arunachalam Ganapathy <Arunachalam.Ganapathy@arm.com>
Subject: RE: [PATCH v5 6/7] firmware: arm_ffa: Setup in-kernel users of FFA partitions
Date: Fri, 9 Apr 2021 15:45:13 +0000 [thread overview]
Message-ID: <VI1PR08MB356704472CA87B757B89AB5296739@VI1PR08MB3567.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <20210325143255.1532452-7-sudeep.holla@arm.com>
Hi Sudeep,
> -----Original Message-----
> From: Sudeep Holla <sudeep.holla@arm.com>
> Sent: 25 March 2021 14:33
> To: linux-arm-kernel@lists.infradead.org; devicetree@vger.kernel.org
> Cc: Sudeep Holla <Sudeep.Holla@arm.com>; Trilok Soni
> <tsoni@codeaurora.org>; arve@android.com; Andrew Walbran
> <qwandor@google.com>; David Hartley <dhh@qti.qualcomm.com>; Achin
> Gupta <Achin.Gupta@arm.com>; Jens Wiklander
> <jens.wiklander@linaro.org>; Arunachalam Ganapathy
> <Arunachalam.Ganapathy@arm.com>; Marc Bonnici <Marc.Bonnici@arm.com>
> Subject: [PATCH v5 6/7] firmware: arm_ffa: Setup in-kernel users of
> FFA partitions
>
> Parse the FFA nodes from the device-tree and register all the
> partitions whose services will be used in the kernel.
>
> In order to also enable in-kernel users of FFA interface, let us add
> simple set of operations for such devices.
>
> The in-kernel users are registered without the character device
> interface.
>
> Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
> Tested-by: Jens Wiklander <jens.wiklander@linaro.org>
> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
> ---
> drivers/firmware/arm_ffa/common.h | 2 +
> drivers/firmware/arm_ffa/driver.c | 188
> ++++++++++++++++++++++++++++++
> include/linux/arm_ffa.h | 38 +++++-
> 3 files changed, 227 insertions(+), 1 deletion(-)
>
[snip]
>
> +static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool
> mode_32bit,
> + struct ffa_send_direct_data *data) {
> + u32 req_id, resp_id, src_dst_ids = PACK_TARGET_INFO(src_id,
> dst_id);
> + ffa_res_t ret;
> +
> + if (mode_32bit) {
> + req_id = FFA_MSG_SEND_DIRECT_REQ;
> + resp_id = FFA_MSG_SEND_DIRECT_RESP;
> + } else {
> + req_id = FFA_FN_NATIVE(MSG_SEND_DIRECT_REQ);
> + resp_id = FFA_FN_NATIVE(MSG_SEND_DIRECT_RESP);
> + }
> +
> + ret = invoke_ffa_fn(req_id, src_dst_ids, 0, data->data0, data-
> >data1,
> + data->data2, data->data3, data->data4);
> +
> + while (ret.a0 == FFA_INTERRUPT)
> + ret = invoke_ffa_fn(FFA_RUN, ret.a1, 0, 0, 0, 0, 0, 0);
> + if (ret.a0 == FFA_ERROR)
> + return ffa_to_linux_errno((int)ret.a2);
> +
> + if (ret.a0 == resp_id) {
> + data->data0 = ret.a3;
> + data->data1 = ret.a4;
> + data->data2 = ret.a5;
> + data->data3 = ret.a6;
> + data->data4 = ret.a7;
> + }
> +
> + return 0;
> +}
> +
If the returned function ID is not FFA_ERROR but still not what we're
expecting here we should return an error to the calling code rather
than success.
Kind Regards
Marc Bonnici
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next prev parent reply other threads:[~2021-04-09 15:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 14:32 [PATCH v5 0/7] firmware: Add initial support for Arm FF-A Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 1/7] dt-bindings: Arm: Add Firmware Framework for Armv8-A (FF-A) binding Sudeep Holla
2021-03-26 5:05 ` Sumit Garg
2021-03-26 10:55 ` Sudeep Holla
2021-03-26 11:56 ` Sumit Garg
2021-03-30 15:03 ` Rob Herring
2021-04-06 15:08 ` Achin Gupta
2021-03-25 14:32 ` [PATCH v5 2/7] arm64: smccc: Add support for SMCCCv1.2 input/output registers Sudeep Holla
2021-03-25 14:41 ` Mark Rutland
2021-03-26 12:18 ` Mark Rutland
2021-03-26 12:51 ` Sudeep Holla
2021-04-01 15:50 ` Michael Kelley
2021-03-25 14:32 ` [PATCH v5 3/7] firmware: arm_ffa: Add initial FFA bus support for device enumeration Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 4/7] firmware: arm_ffa: Add initial Arm FFA driver support Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 5/7] firmware: arm_ffa: Add support for SMCCC as transport to FFA driver Sudeep Holla
2021-03-25 14:32 ` [PATCH v5 6/7] firmware: arm_ffa: Setup in-kernel users of FFA partitions Sudeep Holla
2021-04-09 15:45 ` Marc Bonnici [this message]
2021-03-25 14:32 ` [PATCH v5 7/7] firmware: arm_ffa: Add support for MEM_* interfaces Sudeep Holla
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