Re: [PATCH v2] bus: mhi: host: pci_generic: Add support for QDU100 device

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Mon, Oct 07, 2024 at 01:45:41PM +0530, Vivek Pernamitta wrote:
> Add MHI controller configuration for QDU100 device.
> 
> This Qualcomm QDU100 device is inline accelerator card
> which is an extension to QRU100 5G RAN platform.
> which is designed to simplify 5G deployments by offering
> a turnkey solution for ease of deployment with O-RAN
> fronthaul and 5G NR layer 1 High (L1 High) processing,
> and to accelerate operator and infrastructure vendor
> adoption of virtualized RAN platforms.
> 
> Currently IP_SW1/2 channel support is not present in
> mhi_net driver, will be supporting them in future.

I don't know what column width you are using, but please use 75 columns for
patch descriptions.

> 
> 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@quicinc.com>
> 
> ---
> changes from V1:
> - Changing naming convention from modem_qcom_qdu100*
>   to mhi_qcom_qdu100*
> - Added more commit test for IP_SW1/2 channels.
> - Fixed and corrected by passing mhi_pci_dev_info struct
>   instead of mhi_controller_config.
> ---
> ---
>  drivers/bus/mhi/host/pci_generic.c | 60 ++++++++++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
> 
> diff --git a/drivers/bus/mhi/host/pci_generic.c b/drivers/bus/mhi/host/pci_generic.c
> index 9938bb034c1c..b9b7dd8d9411 100644
> --- a/drivers/bus/mhi/host/pci_generic.c
> +++ b/drivers/bus/mhi/host/pci_generic.c
> @@ -245,6 +245,63 @@ 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),
> +	MHI_CHANNEL_CONFIG_UL(48, "IP_SW1", 256, 6),
> +	MHI_CHANNEL_CONFIG_DL(49, "IP_SW1", 256, 6),
> +	MHI_CHANNEL_CONFIG_UL(50, "IP_SW2", 256, 7),
> +	MHI_CHANNEL_CONFIG_DL(51, "IP_SW2", 256, 7),

Please drop these unsupported IP_SW channels until you add support in mhi-net
driver.

> +};
> +
> +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-lassen",

I don't think you can use internal chip name in the drivers. Please use the
actual chip code like QDU100.

> +	.fw = "qcom/lassen/xbl_s.melf",
> +	.edl = "qcom/lassen/edl.mbn",

Could you please push these fw to linux-firmware repo? This is a requirement to
get this patch accepted. I should've imposed this at the start itself...

> +	.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 +879,9 @@ 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 },

Spare after (kernel_ulong_t) and also sort the entries as per the comment above
mhi_pci_id_table[].

- Mani

-- 
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