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ice: Add priority information into VLAN header

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This patch introduces a new function ice_tx_prepare_vlan_flags_dcb to
insert 802.1p priority information into the VLAN header

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Anirudh Venkataramanan 2019-02-28 15:24:28 -08:00 committed by Jeff Kirsher
parent a629cf0a01
commit 5f6aa50e4e
4 changed files with 54 additions and 3 deletions
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39
drivers/net/ethernet/intel/ice/ice_dcb_lib.c
View File

@ -359,6 +359,45 @@ int ice_init_pf_dcb(struct ice_pf *pf)
return err;
}
/**
* ice_tx_prepare_vlan_flags_dcb - prepare VLAN tagging for DCB
* @tx_ring: ring to send buffer on
* @first: pointer to struct ice_tx_buf
*/
int
ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring,
struct ice_tx_buf *first)
{
struct sk_buff *skb = first->skb;
if (!test_bit(ICE_FLAG_DCB_ENA, tx_ring->vsi->back->flags))
return 0;
/* Insert 802.1p priority into VLAN header */
if ((first->tx_flags & (ICE_TX_FLAGS_HW_VLAN | ICE_TX_FLAGS_SW_VLAN)) ||
skb->priority != TC_PRIO_CONTROL) {
first->tx_flags &= ~ICE_TX_FLAGS_VLAN_PR_M;
/* Mask the lower 3 bits to set the 802.1p priority */
first->tx_flags |= (skb->priority & 0x7) <<
ICE_TX_FLAGS_VLAN_PR_S;
if (first->tx_flags & ICE_TX_FLAGS_SW_VLAN) {
struct vlan_ethhdr *vhdr;
int rc;
rc = skb_cow_head(skb, 0);
if (rc < 0)
return rc;
vhdr = (struct vlan_ethhdr *)skb->data;
vhdr->h_vlan_TCI = htons(first->tx_flags >>
ICE_TX_FLAGS_VLAN_S);
} else {
first->tx_flags |= ICE_TX_FLAGS_HW_VLAN;
}
}
return 0;
}
/**
* ice_dcb_process_lldp_set_mib_change - Process MIB change
* @pf: ptr to ice_pf

10
drivers/net/ethernet/intel/ice/ice_dcb_lib.h
View File

@ -12,6 +12,9 @@ u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg);
u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg);
void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi);
int ice_init_pf_dcb(struct ice_pf *pf);
int
ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring,
struct ice_tx_buf *first);
void
ice_dcb_process_lldp_set_mib_change(struct ice_pf *pf,
struct ice_rq_event_info *event);
@ -37,6 +40,13 @@ static inline int ice_init_pf_dcb(struct ice_pf *pf)
return -EOPNOTSUPP;
}
static inline int
ice_tx_prepare_vlan_flags_dcb(struct ice_ring __always_unused *tx_ring,
struct ice_tx_buf __always_unused *first)
{
return 0;
}
#define ice_vsi_cfg_dcb_rings(vsi) do {} while (0)
#define ice_dcb_process_lldp_set_mib_change(pf, event) do {} while (0)
#define ice_set_cgd_num(tlan_ctx, ring) do {} while (0)

6
drivers/net/ethernet/intel/ice/ice_txrx.c
View File

@ -6,6 +6,7 @@
#include <linux/prefetch.h>
#include <linux/mm.h>
#include "ice.h"
#include "ice_dcb_lib.h"
#define ICE_RX_HDR_SIZE 256
@ -1798,7 +1799,7 @@ ice_tx_prepare_vlan_flags(struct ice_ring *tx_ring, struct ice_tx_buf *first)
* to the encapsulated ethertype.
*/
skb->protocol = vlan_get_protocol(skb);
goto out;
return 0;
}
/* if we have a HW VLAN tag being added, default to the HW one */
@ -1820,8 +1821,7 @@ ice_tx_prepare_vlan_flags(struct ice_ring *tx_ring, struct ice_tx_buf *first)
first->tx_flags |= ICE_TX_FLAGS_SW_VLAN;
}
out:
return 0;
return ice_tx_prepare_vlan_flags_dcb(tx_ring, first);
}
/**

2
drivers/net/ethernet/intel/ice/ice_txrx.h
View File

@ -45,6 +45,8 @@
#define ICE_TX_FLAGS_HW_VLAN BIT(1)
#define ICE_TX_FLAGS_SW_VLAN BIT(2)
#define ICE_TX_FLAGS_VLAN_M 0xffff0000
#define ICE_TX_FLAGS_VLAN_PR_M 0xe0000000
#define ICE_TX_FLAGS_VLAN_PR_S 29
#define ICE_TX_FLAGS_VLAN_S 16
#define ICE_RX_DMA_ATTR \