linux-kernel - [PATCH v2 04/10] misc: fastrpc: Add fastrpc_remote_heap

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Message-Id: <20221125071405.148786-5-srinivas.kandagatla@linaro.org>
Date:   Fri, 25 Nov 2022 07:13:59 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH v2 04/10] misc: fastrpc: Add fastrpc_remote_heap_alloc

From: Abel Vesa <abel.vesa@...aro.org>

Split fastrpc_buf_alloc in such a way it allows allocation of remote
heap too and add fastrpc_remote_heap_alloc to do so.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/misc/fastrpc.c | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 395036a10e15..9e83743eaca1 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -379,7 +379,7 @@ static void fastrpc_buf_free(struct fastrpc_buf *buf)
 	kfree(buf);
 }
 
-static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
+static int __fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
 			     u64 size, struct fastrpc_buf **obuf)
 {
 	struct fastrpc_buf *buf;
@@ -407,14 +407,37 @@ static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
 		return -ENOMEM;
 	}
 
+	*obuf = buf;
+
+	return 0;
+}
+
+static int fastrpc_buf_alloc(struct fastrpc_user *fl, struct device *dev,
+			     u64 size, struct fastrpc_buf **obuf)
+{
+	int ret;
+	struct fastrpc_buf *buf;
+
+	ret = __fastrpc_buf_alloc(fl, dev, size, obuf);
+	if (ret)
+		return ret;
+
+	buf = *obuf;
+
 	if (fl->sctx && fl->sctx->sid)
 		buf->phys += ((u64)fl->sctx->sid << 32);
 
-	*obuf = buf;
-
 	return 0;
 }
 
+static int fastrpc_remote_heap_alloc(struct fastrpc_user *fl, struct device *dev,
+				     u64 size, struct fastrpc_buf **obuf)
+{
+	struct device *rdev = &fl->cctx->rpdev->dev;
+
+	return  __fastrpc_buf_alloc(fl, rdev, size, obuf);
+}
+
 static void fastrpc_channel_ctx_free(struct kref *ref)
 {
 	struct fastrpc_channel_ctx *cctx;
-- 
2.25.1