bnxt_en: Implement new method to reserve rings.
The new method will call firmware to reserve the desired tx, rx, cmpl rings, ring groups, stats context, and vnic resources. A second query call will check the actual resources that firmware is able to reserve. The driver will then trim and adjust based on the actual resources provided by firmware. The driver will then reserve the final resources in use. This method is a more flexible way of using hardware resources. The resources are not fixed and can by adjusted by firmware. The driver adapts to the available resources that the firmware can reserve for the driver. Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Chan
David S. Miller
parent
58ea801ac4
commit
674f50a5b0
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@ -4498,6 +4498,42 @@ static void bnxt_hwrm_ring_free(struct bnxt *bp, bool close_path)
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}
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}
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static int bnxt_hwrm_get_rings(struct bnxt *bp)
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{
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struct hwrm_func_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
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struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
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struct hwrm_func_qcfg_input req = {0};
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int rc;
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if (bp->hwrm_spec_code < 0x10601)
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return 0;
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bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QCFG, -1, -1);
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req.fid = cpu_to_le16(0xffff);
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mutex_lock(&bp->hwrm_cmd_lock);
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rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
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if (rc) {
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mutex_unlock(&bp->hwrm_cmd_lock);
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return -EIO;
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}
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hw_resc->resv_tx_rings = le16_to_cpu(resp->alloc_tx_rings);
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if (bp->flags & BNXT_FLAG_NEW_RM) {
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u16 cp, stats;
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hw_resc->resv_rx_rings = le16_to_cpu(resp->alloc_rx_rings);
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hw_resc->resv_hw_ring_grps =
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le32_to_cpu(resp->alloc_hw_ring_grps);
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hw_resc->resv_vnics = le16_to_cpu(resp->alloc_vnics);
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cp = le16_to_cpu(resp->alloc_cmpl_rings);
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stats = le16_to_cpu(resp->alloc_stat_ctx);
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cp = min_t(u16, cp, stats);
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hw_resc->resv_cp_rings = cp;
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}
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mutex_unlock(&bp->hwrm_cmd_lock);
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return 0;
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}
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/* Caller must hold bp->hwrm_cmd_lock */
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int __bnxt_hwrm_get_tx_rings(struct bnxt *bp, u16 fid, int *tx_rings)
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{
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@ -4517,33 +4553,190 @@ int __bnxt_hwrm_get_tx_rings(struct bnxt *bp, u16 fid, int *tx_rings)
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return rc;
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}
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static int bnxt_hwrm_reserve_tx_rings(struct bnxt *bp, int *tx_rings)
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static int
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bnxt_hwrm_reserve_pf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
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int ring_grps, int cp_rings, int vnics)
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{
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struct hwrm_func_cfg_input req = {0};
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u32 enables = 0;
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int rc;
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bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
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req.fid = cpu_to_le16(0xffff);
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enables |= tx_rings ? FUNC_CFG_REQ_ENABLES_NUM_TX_RINGS : 0;
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req.num_tx_rings = cpu_to_le16(tx_rings);
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if (bp->flags & BNXT_FLAG_NEW_RM) {
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enables |= rx_rings ? FUNC_CFG_REQ_ENABLES_NUM_RX_RINGS : 0;
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enables |= cp_rings ? FUNC_CFG_REQ_ENABLES_NUM_CMPL_RINGS |
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FUNC_CFG_REQ_ENABLES_NUM_STAT_CTXS : 0;
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enables |= ring_grps ?
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FUNC_CFG_REQ_ENABLES_NUM_HW_RING_GRPS : 0;
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enables |= vnics ? FUNC_VF_CFG_REQ_ENABLES_NUM_VNICS : 0;
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req.num_rx_rings = cpu_to_le16(rx_rings);
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req.num_hw_ring_grps = cpu_to_le16(ring_grps);
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req.num_cmpl_rings = cpu_to_le16(cp_rings);
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req.num_stat_ctxs = req.num_cmpl_rings;
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req.num_vnics = cpu_to_le16(vnics);
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}
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if (!enables)
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return 0;
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req.enables = cpu_to_le32(enables);
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rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
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if (rc)
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return -ENOMEM;
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if (bp->hwrm_spec_code < 0x10601)
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bp->hw_resc.resv_tx_rings = tx_rings;
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rc = bnxt_hwrm_get_rings(bp);
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return rc;
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}
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static int
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bnxt_hwrm_reserve_vf_rings(struct bnxt *bp, int tx_rings, int rx_rings,
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int ring_grps, int cp_rings, int vnics)
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{
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struct hwrm_func_vf_cfg_input req = {0};
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u32 enables = 0;
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int rc;
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if (!(bp->flags & BNXT_FLAG_NEW_RM)) {
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bp->hw_resc.resv_tx_rings = tx_rings;
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return 0;
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}
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bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_VF_CFG, -1, -1);
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enables |= tx_rings ? FUNC_VF_CFG_REQ_ENABLES_NUM_TX_RINGS : 0;
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enables |= rx_rings ? FUNC_VF_CFG_REQ_ENABLES_NUM_RX_RINGS : 0;
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enables |= cp_rings ? FUNC_VF_CFG_REQ_ENABLES_NUM_CMPL_RINGS |
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FUNC_VF_CFG_REQ_ENABLES_NUM_STAT_CTXS : 0;
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enables |= ring_grps ? FUNC_VF_CFG_REQ_ENABLES_NUM_HW_RING_GRPS : 0;
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enables |= vnics ? FUNC_VF_CFG_REQ_ENABLES_NUM_VNICS : 0;
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req.num_tx_rings = cpu_to_le16(tx_rings);
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req.num_rx_rings = cpu_to_le16(rx_rings);
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req.num_hw_ring_grps = cpu_to_le16(ring_grps);
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req.num_cmpl_rings = cpu_to_le16(cp_rings);
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req.num_stat_ctxs = req.num_cmpl_rings;
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req.num_vnics = cpu_to_le16(vnics);
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req.enables = cpu_to_le32(enables);
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rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
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if (rc)
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return -ENOMEM;
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rc = bnxt_hwrm_get_rings(bp);
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return rc;
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}
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static int bnxt_hwrm_reserve_rings(struct bnxt *bp, int tx, int rx, int grp,
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int cp, int vnic)
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{
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if (BNXT_PF(bp))
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return bnxt_hwrm_reserve_pf_rings(bp, tx, rx, grp, cp, vnic);
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else
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return bnxt_hwrm_reserve_vf_rings(bp, tx, rx, grp, cp, vnic);
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}
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static int bnxt_trim_rings(struct bnxt *bp, int *rx, int *tx, int max,
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bool shared);
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static int __bnxt_reserve_rings(struct bnxt *bp)
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{
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struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
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int tx = bp->tx_nr_rings;
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int rx = bp->rx_nr_rings;
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int cp = bp->cp_nr_rings;
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int grp, rx_rings, rc;
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bool sh = false;
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int vnic = 1;
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if (bp->hwrm_spec_code < 0x10601)
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return 0;
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if (BNXT_VF(bp))
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if (bp->flags & BNXT_FLAG_SHARED_RINGS)
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sh = true;
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if (bp->flags & BNXT_FLAG_RFS)
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vnic = rx + 1;
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if (bp->flags & BNXT_FLAG_AGG_RINGS)
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rx <<= 1;
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grp = bp->rx_nr_rings;
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if (tx == hw_resc->resv_tx_rings &&
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(!(bp->flags & BNXT_FLAG_NEW_RM) ||
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(rx == hw_resc->resv_rx_rings &&
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grp == hw_resc->resv_hw_ring_grps &&
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cp == hw_resc->resv_cp_rings && vnic == hw_resc->resv_vnics)))
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return 0;
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bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1);
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req.fid = cpu_to_le16(0xffff);
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req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_NUM_TX_RINGS);
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req.num_tx_rings = cpu_to_le16(*tx_rings);
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rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
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rc = bnxt_hwrm_reserve_rings(bp, tx, rx, grp, cp, vnic);
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if (rc)
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return rc;
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mutex_lock(&bp->hwrm_cmd_lock);
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rc = __bnxt_hwrm_get_tx_rings(bp, 0xffff, tx_rings);
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mutex_unlock(&bp->hwrm_cmd_lock);
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if (!rc)
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bp->hw_resc.resv_tx_rings = *tx_rings;
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tx = hw_resc->resv_tx_rings;
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if (bp->flags & BNXT_FLAG_NEW_RM) {
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rx = hw_resc->resv_rx_rings;
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cp = hw_resc->resv_cp_rings;
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grp = hw_resc->resv_hw_ring_grps;
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vnic = hw_resc->resv_vnics;
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}
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rx_rings = rx;
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if (bp->flags & BNXT_FLAG_AGG_RINGS) {
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if (rx >= 2) {
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rx_rings = rx >> 1;
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} else {
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if (netif_running(bp->dev))
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return -ENOMEM;
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bp->flags &= ~BNXT_FLAG_AGG_RINGS;
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bp->flags |= BNXT_FLAG_NO_AGG_RINGS;
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bp->dev->hw_features &= ~NETIF_F_LRO;
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bp->dev->features &= ~NETIF_F_LRO;
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bnxt_set_ring_params(bp);
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}
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}
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rx_rings = min_t(int, rx_rings, grp);
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rc = bnxt_trim_rings(bp, &rx_rings, &tx, cp, sh);
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if (bp->flags & BNXT_FLAG_AGG_RINGS)
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rx = rx_rings << 1;
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cp = sh ? max_t(int, tx, rx_rings) : tx + rx_rings;
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bp->tx_nr_rings = tx;
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bp->rx_nr_rings = rx_rings;
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bp->cp_nr_rings = cp;
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if (!tx || !rx || !cp || !grp || !vnic)
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return -ENOMEM;
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return rc;
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}
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static bool bnxt_need_reserve_rings(struct bnxt *bp)
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{
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struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
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int rx = bp->rx_nr_rings;
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int vnic = 1;
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if (bp->hwrm_spec_code < 0x10601)
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return false;
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if (hw_resc->resv_tx_rings != bp->tx_nr_rings)
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return true;
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if (bp->flags & BNXT_FLAG_RFS)
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vnic = rx + 1;
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if (bp->flags & BNXT_FLAG_AGG_RINGS)
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rx <<= 1;
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if ((bp->flags & BNXT_FLAG_NEW_RM) &&
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(hw_resc->resv_rx_rings != rx ||
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hw_resc->resv_cp_rings != bp->cp_nr_rings ||
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hw_resc->resv_vnics != vnic))
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return true;
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return false;
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}
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static int bnxt_hwrm_check_tx_rings(struct bnxt *bp, int tx_rings)
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{
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struct hwrm_func_cfg_input req = {0};
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@ -5270,15 +5463,6 @@ static int bnxt_init_chip(struct bnxt *bp, bool irq_re_init)
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rc);
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goto err_out;
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}
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if (bp->hw_resc.resv_tx_rings != bp->tx_nr_rings) {
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int tx = bp->tx_nr_rings;
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if (bnxt_hwrm_reserve_tx_rings(bp, &tx) ||
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tx < bp->tx_nr_rings) {
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rc = -ENOMEM;
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goto err_out;
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}
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}
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}
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rc = bnxt_hwrm_ring_alloc(bp);
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@ -5637,6 +5821,36 @@ static void bnxt_clear_int_mode(struct bnxt *bp)
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bp->flags &= ~BNXT_FLAG_USING_MSIX;
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}
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static int bnxt_reserve_rings(struct bnxt *bp)
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{
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int orig_cp = bp->hw_resc.resv_cp_rings;
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int tcs = netdev_get_num_tc(bp->dev);
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int rc;
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if (!bnxt_need_reserve_rings(bp))
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return 0;
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rc = __bnxt_reserve_rings(bp);
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if (rc) {
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netdev_err(bp->dev, "ring reservation failure rc: %d\n", rc);
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return rc;
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}
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if ((bp->flags & BNXT_FLAG_NEW_RM) && bp->cp_nr_rings > orig_cp) {
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bnxt_clear_int_mode(bp);
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rc = bnxt_init_int_mode(bp);
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if (rc)
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return rc;
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}
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if (tcs && (bp->tx_nr_rings_per_tc * tcs != bp->tx_nr_rings)) {
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netdev_err(bp->dev, "tx ring reservation failure\n");
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netdev_reset_tc(bp->dev);
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bp->tx_nr_rings_per_tc = bp->tx_nr_rings;
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return -ENOMEM;
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}
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bp->num_stat_ctxs = bp->cp_nr_rings;
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return 0;
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}
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static void bnxt_free_irq(struct bnxt *bp)
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{
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struct bnxt_irq *irq;
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@ -6387,6 +6601,10 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
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bnxt_preset_reg_win(bp);
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netif_carrier_off(bp->dev);
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if (irq_re_init) {
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rc = bnxt_reserve_rings(bp);
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if (rc)
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return rc;
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rc = bnxt_setup_int_mode(bp);
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if (rc) {
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netdev_err(bp->dev, "bnxt_setup_int_mode err: %x\n",
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@ -8062,16 +8280,20 @@ static int bnxt_set_dflt_rings(struct bnxt *bp, bool sh)
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bp->cp_nr_rings = bp->tx_nr_rings_per_tc + bp->rx_nr_rings;
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bp->tx_nr_rings = bp->tx_nr_rings_per_tc;
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rc = bnxt_hwrm_reserve_tx_rings(bp, &bp->tx_nr_rings_per_tc);
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rc = __bnxt_reserve_rings(bp);
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if (rc)
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netdev_warn(bp->dev, "Unable to reserve tx rings\n");
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bp->tx_nr_rings_per_tc = bp->tx_nr_rings;
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if (sh)
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bnxt_trim_dflt_sh_rings(bp);
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bp->tx_nr_rings = bp->tx_nr_rings_per_tc;
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bp->cp_nr_rings = sh ? max_t(int, bp->tx_nr_rings, bp->rx_nr_rings) :
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bp->tx_nr_rings + bp->rx_nr_rings;
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/* Rings may have been trimmed, re-reserve the trimmed rings. */
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if (bnxt_need_reserve_rings(bp)) {
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rc = __bnxt_reserve_rings(bp);
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if (rc)
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netdev_warn(bp->dev, "2nd rings reservation failed.\n");
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bp->tx_nr_rings_per_tc = bp->tx_nr_rings;
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}
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bp->num_stat_ctxs = bp->cp_nr_rings;
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if (BNXT_CHIP_TYPE_NITRO_A0(bp)) {
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bp->rx_nr_rings++;
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