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From:   Jonathan Marek <jonathan@marek.ca>
To:     linux-arm-msm@vger.kernel.org
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>,
        linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] misc: fastrpc: add ioctl for attaching to sensors pd
Date:   Mon, 31 Aug 2020 20:32:59 -0400
Message-Id: <20200901003300.11985-1-jonathan@marek.ca>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Initializing sensors requires attaching to pd 2. Add an ioctl for that.

This corresponds to FASTRPC_INIT_ATTACH_SENSORS in the downstream driver.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
---
 drivers/misc/fastrpc.c      | 9 ++++++---
 include/uapi/misc/fastrpc.h | 5 +++--
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 7939c55daceb..ea5e9ca0d705 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1276,7 +1276,7 @@ static int fastrpc_dmabuf_alloc(struct fastrpc_user *fl, char __user *argp)
 	return 0;
 }
 
-static int fastrpc_init_attach(struct fastrpc_user *fl)
+static int fastrpc_init_attach(struct fastrpc_user *fl, int pd)
 {
 	struct fastrpc_invoke_args args[1];
 	int tgid = fl->tgid;
@@ -1287,7 +1287,7 @@ static int fastrpc_init_attach(struct fastrpc_user *fl)
 	args[0].fd = -1;
 	args[0].reserved = 0;
 	sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_ATTACH, 1, 0);
-	fl->pd = 0;
+	fl->pd = pd;
 
 	return fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE,
 				       sc, &args[0]);
@@ -1477,7 +1477,10 @@ static long fastrpc_device_ioctl(struct file *file, unsigned int cmd,
 		err = fastrpc_invoke(fl, argp);
 		break;
 	case FASTRPC_IOCTL_INIT_ATTACH:
-		err = fastrpc_init_attach(fl);
+		err = fastrpc_init_attach(fl, 0);
+		break;
+	case FASTRPC_IOCTL_INIT_ATTACH_SNS:
+		err = fastrpc_init_attach(fl, 2);
 		break;
 	case FASTRPC_IOCTL_INIT_CREATE:
 		err = fastrpc_init_create_process(fl, argp);
diff --git a/include/uapi/misc/fastrpc.h b/include/uapi/misc/fastrpc.h
index 07de2b7aac85..0a89f95463f6 100644
--- a/include/uapi/misc/fastrpc.h
+++ b/include/uapi/misc/fastrpc.h
@@ -10,8 +10,9 @@
 #define FASTRPC_IOCTL_INVOKE		_IOWR('R', 3, struct fastrpc_invoke)
 #define FASTRPC_IOCTL_INIT_ATTACH	_IO('R', 4)
 #define FASTRPC_IOCTL_INIT_CREATE	_IOWR('R', 5, struct fastrpc_init_create)
-#define FASTRPC_IOCTL_MMAP              _IOWR('R', 6, struct fastrpc_req_mmap)
-#define FASTRPC_IOCTL_MUNMAP            _IOWR('R', 7, struct fastrpc_req_munmap)
+#define FASTRPC_IOCTL_MMAP		_IOWR('R', 6, struct fastrpc_req_mmap)
+#define FASTRPC_IOCTL_MUNMAP		_IOWR('R', 7, struct fastrpc_req_munmap)
+#define FASTRPC_IOCTL_INIT_ATTACH_SNS	_IO('R', 8)
 
 struct fastrpc_invoke_args {
 	__u64 ptr;
-- 
2.26.1