From: Loic Poulain <loic.poulain@linaro.org>
To: mani@kernel.org, hemantk@codeaurora.org
Cc: linux-arm-msm@vger.kernel.org,
Loic Poulain <loic.poulain@linaro.org>,
stable@vger.kernel.org
Subject: [PATCH] mhi: pci_generic: Fix inbound IPCR channel
Date: Thu, 8 Jul 2021 11:32:29 +0200 [thread overview]
Message-ID: <1625736749-24947-1-git-send-email-loic.poulain@linaro.org> (raw)
The qrtr-mhi client driver assumes that inbound buffers are
automatically allocated and queued by the MHI core, but this
no happens for mhi pci devices since IPCR inbound channel is
not flagged with auto_queue, causing unusable IPCR (qrtr)
feature. Fix that.
Cc: stable@vger.kernel.org
Fixes: 855a70c12021 ("bus: mhi: Add MHI PCI support for WWAN modems")
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
---
drivers/bus/mhi/pci_generic.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/drivers/bus/mhi/pci_generic.c b/drivers/bus/mhi/pci_generic.c
index 8bc6149..6d2ddec 100644
--- a/drivers/bus/mhi/pci_generic.c
+++ b/drivers/bus/mhi/pci_generic.c
@@ -75,6 +75,22 @@ struct mhi_pci_dev_info {
.doorbell_mode_switch = false, \
}
+#define MHI_CHANNEL_CONFIG_DL_AUTOQUEUE(ch_num, ch_name, el_count, ev_ring) \
+ { \
+ .num = ch_num, \
+ .name = ch_name, \
+ .num_elements = el_count, \
+ .event_ring = ev_ring, \
+ .dir = DMA_FROM_DEVICE, \
+ .ee_mask = BIT(MHI_EE_AMSS), \
+ .pollcfg = 0, \
+ .doorbell = MHI_DB_BRST_DISABLE, \
+ .lpm_notify = false, \
+ .offload_channel = false, \
+ .doorbell_mode_switch = false, \
+ .auto_queue = true, \
+ }
+
#define MHI_EVENT_CONFIG_CTRL(ev_ring, el_count) \
{ \
.num_elements = el_count, \
@@ -213,7 +229,7 @@ static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
MHI_CHANNEL_CONFIG_UL(14, "QMI", 4, 0),
MHI_CHANNEL_CONFIG_DL(15, "QMI", 4, 0),
MHI_CHANNEL_CONFIG_UL(20, "IPCR", 8, 0),
- MHI_CHANNEL_CONFIG_DL(21, "IPCR", 8, 0),
+ 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),
--
2.7.4
next reply other threads:[~2021-07-08 9:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-08 9:32 Loic Poulain [this message]
2021-07-08 17:37 ` [PATCH] mhi: pci_generic: Fix inbound IPCR channel Hemant Kumar
2021-07-08 19:54 ` Bhaumik Bhatt
2021-07-16 7:21 ` Manivannan Sadhasivam
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