linux-kernel - [PATCH v1] bus: mhi: host: pci_generic: Add support for EM929x and set MRU to 32768 for better performance.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20250521234640.3056893-1-zxue@semtech.com>
Date: Wed, 21 May 2025 16:46:40 -0700
From: Adam Xue <zxue@...tech.com>
To: manivannan.sadhasivam@...aro.org,
	slark_xiao@....com,
	johan+linaro@...nel.org,
	quic_vpernami@...cinc.com,
	tglx@...utronix.de,
	fabio.porcedda@...il.com,
	quic_msarkar@...cinc.com,
	mank.wang@...prisma.us,
	mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: zxue@...tech.com,
	imocanu@...tech.com
Subject: [PATCH v1] bus: mhi: host: pci_generic: Add support for EM929x and set MRU to 32768 for better performance.

Add MHI controller config for EM929x. It uses the same configuration
as EM919x. Also set the MRU to 32768 to improve downlink throughput.

02:00.0 Unassigned class [ff00]: Qualcomm Technologies, Inc Device 0308
	Subsystem: Device 18d7:0301

Signed-off-by: Adam Xue <zxue@...tech.com>
---
 drivers/bus/mhi/host/pci_generic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
index 03aa88795209..9bf8e7991745 100644
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@@ -695,6 +695,7 @@ static const struct mhi_pci_dev_info mhi_sierra_em919x_info = {
 	.config = &modem_sierra_em919x_config,
 	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
 	.dma_data_width = 32,
+	.mru_default = 32768,
 	.sideband_wake = false,
 };
 
@@ -813,6 +814,9 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 	/* EM919x (sdx55), use the same vid:pid as qcom-sdx55m */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x18d7, 0x0200),
 		.driver_data = (kernel_ulong_t) &mhi_sierra_em919x_info },
+	/* EM929x (sdx65), use the same configuration as EM919x */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0308, 0x18d7, 0x0301),
+		.driver_data = (kernel_ulong_t) &mhi_sierra_em919x_info },
 	/* Telit FN980 hardware revision v1 */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_QCOM, 0x0306, 0x1C5D, 0x2000),
 		.driver_data = (kernel_ulong_t) &mhi_telit_fn980_hw_v1_info },
-- 
2.45.2


To view our privacy policy, including the types of personal information we collect, process and share, and the rights and options you have in this respect, see www.semtech.com/legal.