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nfp: read mailbox address from TLV caps
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Allow specifying alternative vNIC mailbox location in TLV caps.
This way we can size the mailbox to the needs and not necessarily
waste 512B of ctrl memory space.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jakub Kicinski authored and David S. Miller committed Jan 19, 2018
1 parent ce991ab commit 527d7d1
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Showing 3 changed files with 46 additions and 10 deletions.
20 changes: 14 additions & 6 deletions drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -293,17 +293,23 @@ int nfp_net_reconfig(struct nfp_net *nn, u32 update)
*/
static int nfp_net_reconfig_mbox(struct nfp_net *nn, u32 mbox_cmd)
{
u32 mbox = nn->tlv_caps.mbox_off;
int ret;

nn_writeq(nn, NFP_NET_CFG_MBOX_CMD, mbox_cmd);
if (!nfp_net_has_mbox(&nn->tlv_caps)) {
nn_err(nn, "no mailbox present, command: %u\n", mbox_cmd);
return -EIO;
}

nn_writeq(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_CMD, mbox_cmd);

ret = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_MBOX);
if (ret) {
nn_err(nn, "Mailbox update error\n");
return ret;
}

return -nn_readl(nn, NFP_NET_CFG_MBOX_RET);
return -nn_readl(nn, mbox + NFP_NET_CFG_MBOX_SIMPLE_RET);
}

/* Interrupt configuration and handling
Expand Down Expand Up @@ -3084,8 +3090,9 @@ nfp_net_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
if (!vid)
return 0;

nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid);
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q);
nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
ETH_P_8021Q);

return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD);
}
Expand All @@ -3101,8 +3108,9 @@ nfp_net_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
if (!vid)
return 0;

nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_VID, vid);
nn_writew(nn, NFP_NET_CFG_VLAN_FILTER_PROTO, ETH_P_8021Q);
nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_VID, vid);
nn_writew(nn, nn->tlv_caps.mbox_off + NFP_NET_CFG_VLAN_FILTER_PROTO,
ETH_P_8021Q);

return nfp_net_reconfig_mbox(nn, NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL);
}
Expand Down
11 changes: 11 additions & 0 deletions drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,8 @@ static void nfp_net_tlv_caps_reset(struct nfp_net_tlv_caps *caps)
{
memset(caps, 0, sizeof(*caps));
caps->me_freq_mhz = 1200;
caps->mbox_off = NFP_NET_CFG_MBOX_BASE;
caps->mbox_len = NFP_NET_CFG_MBOX_VAL_MAX_SZ;
}

int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,
Expand Down Expand Up @@ -102,6 +104,15 @@ int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,

caps->me_freq_mhz = readl(data);
break;
case NFP_NET_CFG_TLV_TYPE_MBOX:
if (!length) {
caps->mbox_off = 0;
caps->mbox_len = 0;
} else {
caps->mbox_off = data - ctrl_mem;
caps->mbox_len = length;
}
break;
default:
if (!FIELD_GET(NFP_NET_CFG_TLV_HEADER_REQUIRED, hdr))
break;
Expand Down
25 changes: 21 additions & 4 deletions drivers/net/ethernet/netronome/nfp/nfp_net_ctrl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -413,11 +413,14 @@
* 4B used for update command and 4B return code
* followed by a max of 504B of variable length value
*/
#define NFP_NET_CFG_MBOX_CMD 0x1800
#define NFP_NET_CFG_MBOX_RET 0x1804
#define NFP_NET_CFG_MBOX_VAL 0x1808
#define NFP_NET_CFG_MBOX_BASE 0x1800
#define NFP_NET_CFG_MBOX_VAL_MAX_SZ 0x1F8

#define NFP_NET_CFG_MBOX_SIMPLE_CMD 0x0
#define NFP_NET_CFG_MBOX_SIMPLE_RET 0x4
#define NFP_NET_CFG_MBOX_SIMPLE_VAL 0x8
#define NFP_NET_CFG_MBOX_SIMPLE_LEN 0x12

#define NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_ADD 1
#define NFP_NET_CFG_MBOX_CMD_CTAG_FILTER_KILL 2

Expand All @@ -428,7 +431,7 @@
* %NFP_NET_CFG_VLAN_FILTER_PROTO: VLAN proto to filter
* %NFP_NET_CFG_VXLAN_SZ: Size of the VLAN filter mailbox in bytes
*/
#define NFP_NET_CFG_VLAN_FILTER NFP_NET_CFG_MBOX_VAL
#define NFP_NET_CFG_VLAN_FILTER NFP_NET_CFG_MBOX_SIMPLE_VAL
#define NFP_NET_CFG_VLAN_FILTER_VID NFP_NET_CFG_VLAN_FILTER
#define NFP_NET_CFG_VLAN_FILTER_PROTO (NFP_NET_CFG_VLAN_FILTER + 2)
#define NFP_NET_CFG_VLAN_FILTER_SZ 0x0004
Expand Down Expand Up @@ -478,23 +481,37 @@
* %NFP_NET_CFG_TLV_TYPE_ME_FREQ:
* Single word, ME frequency in MHz as used in calculation for
* %NFP_NET_CFG_RXR_IRQ_MOD and %NFP_NET_CFG_TXR_IRQ_MOD.
*
* %NFP_NET_CFG_TLV_TYPE_MBOX:
* Variable, mailbox area. Overwrites the default location which is
* %NFP_NET_CFG_MBOX_BASE and length %NFP_NET_CFG_MBOX_VAL_MAX_SZ.
*/
#define NFP_NET_CFG_TLV_TYPE_UNKNOWN 0
#define NFP_NET_CFG_TLV_TYPE_RESERVED 1
#define NFP_NET_CFG_TLV_TYPE_END 2
#define NFP_NET_CFG_TLV_TYPE_ME_FREQ 3
#define NFP_NET_CFG_TLV_TYPE_MBOX 4

struct device;

/**
* struct nfp_net_tlv_caps - parsed control BAR TLV capabilities
* @me_freq_mhz: ME clock_freq (MHz)
* @mbox_off: vNIC mailbox area offset
* @mbox_len: vNIC mailbox area length
*/
struct nfp_net_tlv_caps {
u32 me_freq_mhz;
unsigned int mbox_off;
unsigned int mbox_len;
};

int nfp_net_tlv_caps_parse(struct device *dev, u8 __iomem *ctrl_mem,
struct nfp_net_tlv_caps *caps);

static inline bool nfp_net_has_mbox(struct nfp_net_tlv_caps *caps)
{
return caps->mbox_len >= NFP_NET_CFG_MBOX_SIMPLE_LEN;
}

#endif /* _NFP_NET_CTRL_H_ */

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