6.12-stable review patch. If anyone has any objections, please let me know.
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From: Jacob Keller jacob.e.keller@intel.com
[ Upstream commit 7e61c89c6065731dfc11ac7a2c0dd27a910f2afb ]
The max_frame and rx_buf_len fields of the VSI set the maximum frame size for packets on the wire, and configure the size of the Rx buffer. In the hardware, these are per-queue configuration. Most VSI types use a simple method to determine the size of the buffers for all queues.
However, VFs may potentially configure different values for each queue. While the Linux iAVF driver does not do this, it is allowed by the virtchnl interface.
The current virtchnl code simply sets the per-VSI fields inbetween calls to ice_vsi_cfg_single_rxq(). This technically works, as these fields are only ever used when programming the Rx ring, and otherwise not checked again. However, it is confusing to maintain.
The Rx ring also already has an rx_buf_len field in order to access the buffer length in the hotpath. It also has extra unused bytes in the ring structure which we can make use of to store the maximum frame size.
Drop the VSI max_frame and rx_buf_len fields. Add max_frame to the Rx ring, and slightly re-order rx_buf_len to better fit into the gaps in the structure layout.
Change the ice_vsi_cfg_frame_size function so that it writes to the ring fields. Call this function once per ring in ice_vsi_cfg_rxqs(). This is done over calling it inside the ice_vsi_cfg_rxq(), because ice_vsi_cfg_rxq() is called in the virtchnl flow where the max_frame and rx_buf_len have already been configured.
Change the accesses for rx_buf_len and max_frame to all point to the ring structure. This has the added benefit that ice_vsi_cfg_rxq() no longer has the surprise side effect of updating ring->rx_buf_len based on the VSI field.
Update the virtchnl ice_vc_cfg_qs_msg() function to set the ring values directly, and drop references to the removed VSI fields.
This now makes the VF logic clear, as the ring fields are obviously per-queue. This reduces the required cognitive load when reasoning about this logic.
Note that removing the VSI fields does leave a 4 byte gap, but the ice_vsi structure has many gaps, and its layout is not as critical in the hot path. The structure may benefit from a more thorough repacking, but no attempt was made in this change.
Signed-off-by: Jacob Keller jacob.e.keller@intel.com Tested-by: Rafal Romanowski rafal.romanowski@intel.com Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Stable-dep-of: 84bf1ac85af8 ("ice: fix Rx page leak on multi-buffer frames") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/ice/ice.h | 3 -- drivers/net/ethernet/intel/ice/ice_base.c | 34 ++++++++++--------- drivers/net/ethernet/intel/ice/ice_txrx.h | 3 +- drivers/net/ethernet/intel/ice/ice_virtchnl.c | 7 ++-- 4 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index 2960709f6b62c..0e699a0432c5b 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -372,9 +372,6 @@ struct ice_vsi { spinlock_t arfs_lock; /* protects aRFS hash table and filter state */ atomic_t *arfs_last_fltr_id;
- u16 max_frame; - u16 rx_buf_len; - struct ice_aqc_vsi_props info; /* VSI properties */ struct ice_vsi_vlan_info vlan_info; /* vlan config to be restored */
diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c index 4a9a6899fc453..98c3764fed396 100644 --- a/drivers/net/ethernet/intel/ice/ice_base.c +++ b/drivers/net/ethernet/intel/ice/ice_base.c @@ -445,7 +445,7 @@ static int ice_setup_rx_ctx(struct ice_rx_ring *ring) /* Max packet size for this queue - must not be set to a larger value * than 5 x DBUF */ - rlan_ctx.rxmax = min_t(u32, vsi->max_frame, + rlan_ctx.rxmax = min_t(u32, ring->max_frame, ICE_MAX_CHAINED_RX_BUFS * ring->rx_buf_len);
/* Rx queue threshold in units of 64 */ @@ -541,8 +541,6 @@ static int ice_vsi_cfg_rxq(struct ice_rx_ring *ring) u32 num_bufs = ICE_RX_DESC_UNUSED(ring); int err;
- ring->rx_buf_len = ring->vsi->rx_buf_len; - if (ring->vsi->type == ICE_VSI_PF || ring->vsi->type == ICE_VSI_SF) { if (!xdp_rxq_info_is_reg(&ring->xdp_rxq)) { err = __xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev, @@ -641,21 +639,25 @@ int ice_vsi_cfg_single_rxq(struct ice_vsi *vsi, u16 q_idx) /** * ice_vsi_cfg_frame_size - setup max frame size and Rx buffer length * @vsi: VSI + * @ring: Rx ring to configure + * + * Determine the maximum frame size and Rx buffer length to use for a PF VSI. + * Set these in the associated Rx ring structure. */ -static void ice_vsi_cfg_frame_size(struct ice_vsi *vsi) +static void ice_vsi_cfg_frame_size(struct ice_vsi *vsi, struct ice_rx_ring *ring) { if (!vsi->netdev || test_bit(ICE_FLAG_LEGACY_RX, vsi->back->flags)) { - vsi->max_frame = ICE_MAX_FRAME_LEGACY_RX; - vsi->rx_buf_len = ICE_RXBUF_1664; + ring->max_frame = ICE_MAX_FRAME_LEGACY_RX; + ring->rx_buf_len = ICE_RXBUF_1664; #if (PAGE_SIZE < 8192) } else if (!ICE_2K_TOO_SMALL_WITH_PADDING && (vsi->netdev->mtu <= ETH_DATA_LEN)) { - vsi->max_frame = ICE_RXBUF_1536 - NET_IP_ALIGN; - vsi->rx_buf_len = ICE_RXBUF_1536 - NET_IP_ALIGN; + ring->max_frame = ICE_RXBUF_1536 - NET_IP_ALIGN; + ring->rx_buf_len = ICE_RXBUF_1536 - NET_IP_ALIGN; #endif } else { - vsi->max_frame = ICE_AQ_SET_MAC_FRAME_SIZE_MAX; - vsi->rx_buf_len = ICE_RXBUF_3072; + ring->max_frame = ICE_AQ_SET_MAC_FRAME_SIZE_MAX; + ring->rx_buf_len = ICE_RXBUF_3072; } }
@@ -670,15 +672,15 @@ int ice_vsi_cfg_rxqs(struct ice_vsi *vsi) { u16 i;
- if (vsi->type == ICE_VSI_VF) - goto setup_rings; - - ice_vsi_cfg_frame_size(vsi); -setup_rings: /* set up individual rings */ ice_for_each_rxq(vsi, i) { - int err = ice_vsi_cfg_rxq(vsi->rx_rings[i]); + struct ice_rx_ring *ring = vsi->rx_rings[i]; + int err; + + if (vsi->type != ICE_VSI_VF) + ice_vsi_cfg_frame_size(vsi, ring);
+ err = ice_vsi_cfg_rxq(ring); if (err) return err; } diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h index 7130992d41779..7eef66f5964a3 100644 --- a/drivers/net/ethernet/intel/ice/ice_txrx.h +++ b/drivers/net/ethernet/intel/ice/ice_txrx.h @@ -358,8 +358,9 @@ struct ice_rx_ring { struct ice_rx_ring *next; /* pointer to next ring in q_vector */ struct xsk_buff_pool *xsk_pool; u32 nr_frags; - dma_addr_t dma; /* physical address of ring */ + u16 max_frame; u16 rx_buf_len; + dma_addr_t dma; /* physical address of ring */ u8 dcb_tc; /* Traffic class of ring */ u8 ptp_rx; #define ICE_RX_FLAGS_RING_BUILD_SKB BIT(1) diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl.c b/drivers/net/ethernet/intel/ice/ice_virtchnl.c index 87ffd25b268a2..471d64d202b76 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl.c @@ -1748,19 +1748,18 @@ static int ice_vc_cfg_qs_msg(struct ice_vf *vf, u8 *msg) (qpi->rxq.databuffer_size > ((16 * 1024) - 128) || qpi->rxq.databuffer_size < 1024)) goto error_param; - vsi->rx_buf_len = qpi->rxq.databuffer_size; - ring->rx_buf_len = vsi->rx_buf_len; + ring->rx_buf_len = qpi->rxq.databuffer_size; if (qpi->rxq.max_pkt_size > max_frame_size || qpi->rxq.max_pkt_size < 64) goto error_param;
- vsi->max_frame = qpi->rxq.max_pkt_size; + ring->max_frame = qpi->rxq.max_pkt_size; /* add space for the port VLAN since the VF driver is * not expected to account for it in the MTU * calculation */ if (ice_vf_is_port_vlan_ena(vf)) - vsi->max_frame += VLAN_HLEN; + ring->max_frame += VLAN_HLEN;
if (ice_vsi_cfg_single_rxq(vsi, q_idx)) { dev_warn(ice_pf_to_dev(pf), "VF-%d failed to configure RX queue %d\n",