net/qede/base: fix number of ports per engine

  Fix the way in which the number of ports per engine of an adapter is
determined by reading port mode register. Set default value to 1.

Fixes: 3b307c55f2ac ("net/qede/base: update FW to 8.40.25.0")
Cc: stable@dpdk.com

Signed-off-by: Rasesh Mody <rmody@marvell.com>
---
 drivers/net/qede/base/ecore_dev.c | 38 ++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 11 deletions(-)
  

On Sat, Dec 21, 2019 at 7:05 AM Rasesh Mody <rmody@marvell.com> wrote:
>
> Fix the way in which the number of ports per engine of an adapter is
> determined by reading port mode register. Set default value to 1.
>
> Fixes: 3b307c55f2ac ("net/qede/base: update FW to 8.40.25.0")
> Cc: stable@dpdk.com

Corrected Cc to stable@dpdk.org

Applied to dpdk-next-net-mrvl/master. Thanks


>
> Signed-off-by: Rasesh Mody <rmody@marvell.com>
> ---
>  drivers/net/qede/base/ecore_dev.c | 38 ++++++++++++++++++++++---------
>  1 file changed, 27 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/qede/base/ecore_dev.c b/drivers/net/qede/base/ecore_dev.c
> index 9d1db14590..f33b9910c0 100644
> --- a/drivers/net/qede/base/ecore_dev.c
> +++ b/drivers/net/qede/base/ecore_dev.c
> @@ -5253,7 +5253,6 @@ static void ecore_emul_hw_info_port_num(struct ecore_hwfn *p_hwfn,
>
>         /* MISCS_REG_ECO_RESERVED[15:12]: num of ports in an engine */
>         eco_reserved = ecore_rd(p_hwfn, p_ptt, MISCS_REG_ECO_RESERVED);
> -
>         switch ((eco_reserved & 0xf000) >> 12) {
>                 case 1:
>                         p_dev->num_ports_in_engine = 1;
> @@ -5268,7 +5267,7 @@ static void ecore_emul_hw_info_port_num(struct ecore_hwfn *p_hwfn,
>                         DP_NOTICE(p_hwfn, false,
>                           "Emulation: Unknown port mode [ECO_RESERVED 0x%08x]\n",
>                           eco_reserved);
> -               p_dev->num_ports_in_engine = 2; /* Default to something */
> +               p_dev->num_ports_in_engine = 1; /* Default to something */
>                 break;
>                 }
>
> @@ -5281,8 +5280,8 @@ static void ecore_emul_hw_info_port_num(struct ecore_hwfn *p_hwfn,
>  static void ecore_hw_info_port_num(struct ecore_hwfn *p_hwfn,
>                                    struct ecore_ptt *p_ptt)
>  {
> +       u32 addr, global_offsize, global_addr, port_mode;
>         struct ecore_dev *p_dev = p_hwfn->p_dev;
> -       u32 addr, global_offsize, global_addr;
>
>  #ifndef ASIC_ONLY
>         if (CHIP_REV_IS_TEDIBEAR(p_dev)) {
> @@ -5304,15 +5303,32 @@ static void ecore_hw_info_port_num(struct ecore_hwfn *p_hwfn,
>                 return;
>         }
>
> -               addr = SECTION_OFFSIZE_ADDR(p_hwfn->mcp_info->public_base,
> -                                           PUBLIC_GLOBAL);
> -               global_offsize = ecore_rd(p_hwfn, p_ptt, addr);
> -               global_addr = SECTION_ADDR(global_offsize, 0);
> -               addr = global_addr + OFFSETOF(struct public_global, max_ports);
> -               p_dev->num_ports = (u8)ecore_rd(p_hwfn, p_ptt, addr);
> +       /* Determine the number of ports per engine */
> +       port_mode = ecore_rd(p_hwfn, p_ptt, MISC_REG_PORT_MODE);
> +       switch (port_mode) {
> +       case 0x0:
> +               p_dev->num_ports_in_engine = 1;
> +               break;
> +       case 0x1:
> +               p_dev->num_ports_in_engine = 2;
> +               break;
> +       case 0x2:
> +               p_dev->num_ports_in_engine = 4;
> +               break;
> +       default:
> +               DP_NOTICE(p_hwfn, false, "Unknown port mode 0x%08x\n",
> +                         port_mode);
> +               p_dev->num_ports_in_engine = 1; /* Default to something */
> +               break;
> +       }
>
> -       p_dev->num_ports_in_engine = p_dev->num_ports >>
> -                                    (ecore_device_num_engines(p_dev) - 1);
> +       /* Get the total number of ports of the device */
> +       addr = SECTION_OFFSIZE_ADDR(p_hwfn->mcp_info->public_base,
> +                                   PUBLIC_GLOBAL);
> +       global_offsize = ecore_rd(p_hwfn, p_ptt, addr);
> +       global_addr = SECTION_ADDR(global_offsize, 0);
> +       addr = global_addr + OFFSETOF(struct public_global, max_ports);
> +       p_dev->num_ports = (u8)ecore_rd(p_hwfn, p_ptt, addr);
>  }
>
>  static void ecore_mcp_get_eee_caps(struct ecore_hwfn *p_hwfn,
> --
> 2.18.0
>