[PATCH v2] net/axgbe: use PCI root complex device to distinguish AMD hardware

[Ferruh Yigit]

On 1/17/2022 5:40 AM, Sebastian, Selwin wrote:
> Acked by: Selwin Sebastian <selwin.sebastian at amd.com>
> 

Hi Selwin,

Patchwork doesn't recognize the tag, I guess because it is looking for
exact "Acked-by: " tag, with '-'.

Can you please pay attention next time, able to see the status in the patchwork
help maintainers to trace patch's status.

Cheers,
ferruh

> -----Original Message-----
> From: Namburu, Chandu-babu <chandu at amd.com>
> Sent: Monday, January 10, 2022 12:08 PM
> To: dev at dpdk.org; david.marchand at redhat.com; ferruh.yigit at intel.com
> Cc: Sebastian, Selwin <Selwin.Sebastian at amd.com>; Arsalan_Awan at mentor.com; stable at dpdk.org
> Subject: RE: [PATCH v2] net/axgbe: use PCI root complex device to distinguish AMD hardware
> 
> [Public]
> 
> Hi,
> 
> Gentle reminder.
> 
> This is patch is required to submit changes for new AMD products. Please review and let us know if any modification are required.
> 
> Regards,
> Chandu
> 
> -----Original Message-----
> From: Namburu, Chandu-babu
> Sent: Wednesday, December 22, 2021 2:58 PM
> To: dev at dpdk.org; david.marchand at redhat.com; ferruh.yigit at intel.com
> Cc: Sebastian, Selwin <Selwin.Sebastian at amd.com>; Arsalan_Awan at mentor.com; stable at dpdk.org
> Subject: RE: [PATCH v2] net/axgbe: use PCI root complex device to distinguish AMD hardware
> 
> [Public]
> 
> Hi David Marchand,
> 
> I have submitted v2 patch with your suggestion in git log. Please review changes.
> 
> Regards,
> Chandu
> 
> -----Original Message-----
> From: Namburu, Chandu-babu <chandu at amd.com>
> Sent: Thursday, December 2, 2021 9:41 PM
> To: dev at dpdk.org; david.marchand at redhat.com
> Cc: Sebastian, Selwin <Selwin.Sebastian at amd.com>; Arsalan_Awan at mentor.com; ferruh.yigit at intel.com; Namburu, Chandu-babu <chandu at amd.com>; stable at dpdk.org
> Subject: [PATCH v2] net/axgbe: use PCI root complex device to distinguish AMD hardware
> 
> "bus/pci: optimize bus scan" broke axgbe on V1000/R1000.
> RV root complex pci device does not have any kernel driver assigned so it is removed from pci scan list which is used in
> "net/axgbe: add a HW quirk for register definitions".
> 
> Get root complex device id directly from pci sysfs instead of pci scan list.
> 
> Fixes: 991e0b1dbc4a (net/axgbe: add a HW quirk for register definitions)
> Cc: stable at dpdk.org
> 
> Signed-off-by: Chandubabu Namburu <chandu at amd.com>
> ---
>   drivers/net/axgbe/axgbe_ethdev.c | 39 ++++++++++++++++----------------
>   1 file changed, 20 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/net/axgbe/axgbe_ethdev.c b/drivers/net/axgbe/axgbe_ethdev.c
> index 7d40c18a86..7b8d94ca3c 100644
> --- a/drivers/net/axgbe/axgbe_ethdev.c
> +++ b/drivers/net/axgbe/axgbe_ethdev.c
> @@ -10,6 +10,8 @@
>   #include "axgbe_regs.h"
>   #include "rte_time.h"
>   
> +#include "eal_filesystem.h"
> +
>   static int eth_axgbe_dev_init(struct rte_eth_dev *eth_dev);  static int  axgbe_dev_configure(struct rte_eth_dev *dev);  static int  axgbe_dev_start(struct rte_eth_dev *dev); @@ -2117,28 +2119,27 @@ static void axgbe_default_config(struct axgbe_port *pdata)
>   	pdata->power_down = 0;
>   }
>   
> -static int
> -pci_device_cmp(const struct rte_device *dev, const void *_pci_id)
> +/*
> + * Return PCI root complex device id on success else 0  */ static
> +uint16_t
> +get_pci_rc_devid(void)
>   {
> -	const struct rte_pci_device *pdev = RTE_DEV_TO_PCI_CONST(dev);
> -	const struct rte_pci_id *pcid = _pci_id;
> +	char pci_sysfs[PATH_MAX];
> +	const struct rte_pci_addr pci_rc_addr = {0, 0, 0, 0};
> +	unsigned long device_id;
>   
> -	if (pdev->id.vendor_id == AMD_PCI_VENDOR_ID &&
> -			pdev->id.device_id == pcid->device_id)
> -		return 0;
> -	return 1;
> -}
> +	snprintf(pci_sysfs, sizeof(pci_sysfs), "%s/" PCI_PRI_FMT "/device",
> +		 rte_pci_get_sysfs_path(), pci_rc_addr.domain,
> +		 pci_rc_addr.bus, pci_rc_addr.devid, pci_rc_addr.function);
>   
> -static bool
> -pci_search_device(int device_id)
> -{
> -	struct rte_bus *pci_bus;
> -	struct rte_pci_id dev_id;
> +	/* get device id */
> +	if (eal_parse_sysfs_value(pci_sysfs, &device_id) < 0) {
> +		PMD_INIT_LOG(ERR, "Error in reading PCI sysfs\n");
> +		return 0;
> +	}
>   
> -	dev_id.device_id = device_id;
> -	pci_bus = rte_bus_find_by_name("pci");
> -	return (pci_bus != NULL) &&
> -		(pci_bus->find_device(NULL, pci_device_cmp, &dev_id) != NULL);
> +	return (uint16_t)device_id;
>   }
>   
>   /*
> @@ -2180,7 +2181,7 @@ eth_axgbe_dev_init(struct rte_eth_dev *eth_dev)
>   	/*
>   	 * Use root complex device ID to differentiate RV AXGBE vs SNOWY AXGBE
>   	 */
> -	if (pci_search_device(AMD_PCI_RV_ROOT_COMPLEX_ID)) {
> +	if ((get_pci_rc_devid()) == AMD_PCI_RV_ROOT_COMPLEX_ID) {
>   		pdata->xpcs_window_def_reg = PCS_V2_RV_WINDOW_DEF;
>   		pdata->xpcs_window_sel_reg = PCS_V2_RV_WINDOW_SELECT;
>   	} else {
> --
> 2.25.1