linux-kernel - [PATCH] bus: mhi: host: pci_generic: Add support for IP

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Date:   Fri, 19 May 2023 19:28:03 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     loic.poulain@...aro.org, quic_krichai@...cinc.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH] bus: mhi: host: pci_generic: Add support for IP_SW0 channels

IP_SW0 channels are used to transfer data over the networking interface
between MHI endpoint and the host. Define the channels in the MHI v1
channel config along with dedicated event rings.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/bus/mhi/host/pci_generic.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index db0a0b062d8e..70e37c490150 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -212,6 +212,19 @@ struct mhi_pci_dev_info {
 		.offload_channel = false,	\
 	}
 
+#define MHI_EVENT_CONFIG_SW_DATA(ev_ring, el_count) \
+	{					\
+		.num_elements = el_count,	\
+		.irq_moderation_ms = 0,		\
+		.irq = (ev_ring) + 1,		\
+		.priority = 1,			\
+		.mode = MHI_DB_BRST_DISABLE,	\
+		.data_type = MHI_ER_DATA,	\
+		.hardware_event = false,	\
+		.client_managed = false,	\
+		.offload_channel = false,	\
+	}
+
 #define MHI_EVENT_CONFIG_HW_DATA(ev_ring, el_count, ch_num) \
 	{					\
 		.num_elements = el_count,	\
@@ -237,8 +250,10 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
 	MHI_CHANNEL_CONFIG_DL_AUTOQUEUE(21, "IPCR", 8, 0),
 	MHI_CHANNEL_CONFIG_UL_FP(34, "FIREHOSE", 32, 0),
 	MHI_CHANNEL_CONFIG_DL_FP(35, "FIREHOSE", 32, 0),
-	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 2),
-	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 3),
+	MHI_CHANNEL_CONFIG_UL(46, "IP_SW0", 64, 2),
+	MHI_CHANNEL_CONFIG_DL(47, "IP_SW0", 64, 3),
+	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 128, 4),
+	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 128, 5),
 };
 
 static struct mhi_event_config modem_qcom_v1_mhi_events[] = {
@@ -246,9 +261,12 @@ static struct mhi_event_config modem_qcom_v1_mhi_events[] = {
 	MHI_EVENT_CONFIG_CTRL(0, 64),
 	/* DIAG dedicated event ring */
 	MHI_EVENT_CONFIG_DATA(1, 128),
+	/* Software channels dedicated event ring */
+	MHI_EVENT_CONFIG_SW_DATA(2, 64),
+	MHI_EVENT_CONFIG_SW_DATA(3, 64),
 	/* Hardware channels request dedicated hardware event rings */
-	MHI_EVENT_CONFIG_HW_DATA(2, 1024, 100),
-	MHI_EVENT_CONFIG_HW_DATA(3, 2048, 101)
+	MHI_EVENT_CONFIG_HW_DATA(4, 1024, 100),
+	MHI_EVENT_CONFIG_HW_DATA(5, 2048, 101)
 };
 
 static const struct mhi_controller_config modem_qcom_v1_mhiv_config = {
-- 
2.25.1