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From:   Abel Vesa <abel.vesa@linaro.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Amol Maheshwari <amahesh@qti.qualcomm.com>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@somainline.org>,
        Ekansh Gupta <quic_ekagupt@quicinc.com>
Cc:     Rob Herring <robh@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-arm-msm@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        devicetree@vger.kernel.org
Subject: [PATCH v2 09/10] misc: fastrpc: Add mmap request assigning for static PD pool
Date:   Fri,  2 Sep 2022 18:48:59 +0300
Message-Id: <20220902154900.3404524-10-abel.vesa@linaro.org>
In-Reply-To: <20220902154900.3404524-1-abel.vesa@linaro.org>
References: <20220902154900.3404524-1-abel.vesa@linaro.org>
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If the mmap request is to add pages and thre are VMIDs associated with
that context, do a call to SCM to reassign that memory. Do not do this
for remote heap allocation, that is done on init create static process
only.

Co-developed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 drivers/misc/fastrpc.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 41eabdf0a256..66dc71e20e4f 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -1849,8 +1849,9 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
 	if (copy_from_user(&req, argp, sizeof(req)))
 		return -EFAULT;
 
-	if (req.flags != ADSP_MMAP_ADD_PAGES) {
+	if (req.flags != ADSP_MMAP_ADD_PAGES && req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR) {
 		dev_err(dev, "flag not supported 0x%x\n", req.flags);
+
 		return -EINVAL;
 	}
 
@@ -1896,6 +1897,22 @@ static int fastrpc_req_mmap(struct fastrpc_user *fl, char __user *argp)
 	/* let the client know the address to use */
 	req.vaddrout = rsp_msg.vaddr;
 
+	/* Add memory to static PD pool, protection thru hypervisor */
+	if (req.flags != ADSP_MMAP_REMOTE_HEAP_ADDR && fl->cctx->vmcount) {
+		struct qcom_scm_vmperm perm;
+		int err = 0;
+
+		perm.vmid = QCOM_SCM_VMID_HLOS;
+		perm.perm = QCOM_SCM_PERM_RWX;
+		err = qcom_scm_assign_mem(buf->phys, buf->size,
+			&(fl->cctx->vmperms[0].vmid), &perm, 1);
+		if (err) {
+			dev_err(fl->sctx->dev, "Failed to assign memory phys 0x%llx size 0x%llx err %d",
+					buf->phys, buf->size, err);
+			goto err_assign;
+		}
+	}
+
 	spin_lock(&fl->lock);
 	list_add_tail(&buf->node, &fl->mmaps);
 	spin_unlock(&fl->lock);
-- 
2.34.1