linux-kernel - Re: [PATCH v4] bus: mhi: host: pci_generic: Add support for QDU100 device

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Message-ID: <20241211064155.gqlbi3leoaaz3w6b@thinkpad>
Date: Wed, 11 Dec 2024 12:11:55 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Vivek Pernamitta <quic_vpernami@...cinc.com>
Cc: quic_krichai@...cinc.com, mhi@...ts.linux.dev,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] bus: mhi: host: pci_generic: Add support for QDU100
 device

On Mon, Dec 09, 2024 at 11:09:50AM +0530, Vivek Pernamitta wrote:
> Add MHI controller configuration for QDU100 device.
> 
> The Qualcomm X100 5G RAN Accelerator card is designed to enhance Open vRAN
> servers by offloading CPUs from intensive 5G baseband functions.
> 
> Link: https://docs.qualcomm.com/bundle/publicresource/87-79371-1_REV_A_Qualcomm_X100_5G_RAN_Accelerator_Card_Product_Brief.pdf
> 
> Signed-off-by: Vivek Pernamitta <quic_vpernami@...cinc.com>
> ---
> changes from V3:
> - Removed IP_SW1 and IP_SW2 support currently, will add once
>   SW_IP1/2 channels support are added to mhi-net driver.
> - Removed qdu100 edl images, as EDL images are not needed.
> - Added space inbetween kernel_ulong_t and mhi_qcom_qdu100_info.
> - QDU100 XBL FW images were pushed to linux-firmware git repo
>   https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/qcom/qdu100
> 
> changes from V2:
> - updated commit text.
> 
> changes from V1:
> - Changing naming convention from modem_qcom_qdu100*
>   to mhi_qcom_qdu100*.
> - Updated commit text.
> - Fixed and corrected by passing mhi_pci_dev_info struct
>   instead of mhi_controller_config.
> ---
> 
> ---
>  drivers/bus/mhi/host/pci_generic.c | 55 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 55 insertions(+)
> 
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index 07645ce2119a71c9277356e962252b840379cd81..dee9fa9e7ae441fbc9a86e53694568c0ba192002 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -245,6 +245,58 @@ struct mhi_pci_dev_info {
>  		.channel = ch_num,		\
>  	}
>  
> +static const struct mhi_channel_config mhi_qcom_qdu100_channels[] = {
> +	MHI_CHANNEL_CONFIG_UL(0, "LOOPBACK", 32, 2),
> +	MHI_CHANNEL_CONFIG_DL(1, "LOOPBACK", 32, 2),
> +	MHI_CHANNEL_CONFIG_UL_SBL(2, "SAHARA", 128, 1),
> +	MHI_CHANNEL_CONFIG_DL_SBL(3, "SAHARA", 128, 1),
> +	MHI_CHANNEL_CONFIG_UL(4, "DIAG", 64, 3),
> +	MHI_CHANNEL_CONFIG_DL(5, "DIAG", 64, 3),
> +	MHI_CHANNEL_CONFIG_UL(9, "QDSS", 64, 3),
> +	MHI_CHANNEL_CONFIG_UL(14, "NMEA", 32, 4),
> +	MHI_CHANNEL_CONFIG_DL(15, "NMEA", 32, 4),
> +	MHI_CHANNEL_CONFIG_UL(16, "CSM_CTRL", 32, 4),
> +	MHI_CHANNEL_CONFIG_DL(17, "CSM_CTRL", 32, 4),
> +	MHI_CHANNEL_CONFIG_UL(40, "MHI_PHC", 32, 4),
> +	MHI_CHANNEL_CONFIG_DL(41, "MHI_PHC", 32, 4),
> +	MHI_CHANNEL_CONFIG_UL(46, "IP_SW0", 256, 5),
> +	MHI_CHANNEL_CONFIG_DL(47, "IP_SW0", 256, 5),
> +};
> +
> +static struct mhi_event_config mhi_qcom_qdu100_events[] = {
> +	/* first ring is control+data ring */
> +	MHI_EVENT_CONFIG_CTRL(0, 64),
> +	/* SAHARA dedicated event ring */
> +	MHI_EVENT_CONFIG_SW_DATA(1, 256),
> +	/* Software channels dedicated event ring */
> +	MHI_EVENT_CONFIG_SW_DATA(2, 64),
> +	MHI_EVENT_CONFIG_SW_DATA(3, 256),
> +	MHI_EVENT_CONFIG_SW_DATA(4, 256),
> +	/* Software IP channels dedicated event ring */
> +	MHI_EVENT_CONFIG_SW_DATA(5, 512),
> +	MHI_EVENT_CONFIG_SW_DATA(6, 512),
> +	MHI_EVENT_CONFIG_SW_DATA(7, 512),
> +};
> +
> +static const struct mhi_controller_config mhi_qcom_qdu100_config = {
> +	.max_channels = 128,
> +	.timeout_ms = 120000,
> +	.num_channels = ARRAY_SIZE(mhi_qcom_qdu100_channels),
> +	.ch_cfg = mhi_qcom_qdu100_channels,
> +	.num_events = ARRAY_SIZE(mhi_qcom_qdu100_events),
> +	.event_cfg = mhi_qcom_qdu100_events,
> +};
> +
> +static const struct mhi_pci_dev_info mhi_qcom_qdu100_info = {
> +	.name = "qcom-qdu100",
> +	.fw = "qcom/qdu100/xbl_s.melf",

Can you first push this fw to linux-firmware? I haven't enforced this
requirement earlier, but that was my mistake.

> +	.edl_trigger = true,
> +	.config = &mhi_qcom_qdu100_config,
> +	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
> +	.dma_data_width = 32,
> +	.sideband_wake = false,
> +};
> +
>  static const struct mhi_channel_config modem_qcom_v1_mhi_channels[] = {
>  	MHI_CHANNEL_CONFIG_UL(4, "DIAG", 16, 1),
>  	MHI_CHANNEL_CONFIG_DL(5, "DIAG", 16, 1),
> @@ -822,6 +874,9 @@ static const struct pci_device_id mhi_pci_id_table[] = {
>  	/* NETPRISMA FCUN69 (SDX6X) */
>  	{ PCI_DEVICE(PCI_VENDOR_ID_NETPRISMA, 0x1001),
>  		.driver_data = (kernel_ulong_t) &mhi_netprisma_fcun69_info },
> +	/* QDU100, x100-DU */
> +	{ PCI_DEVICE(PCI_VENDOR_ID_QCOM, 0x0601),
> +		.driver_data = (kernel_ulong_t) &mhi_qcom_qdu100_info },

Did you read the comment on top of mhi_pci_id_table[]?

- Mani

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