diff options
| author | Michael Chan <michael.chan@broadcom.com> | 2018-01-17 03:21:15 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-17 14:48:27 -0500 |
| commit | c3480a603773cfc5d8aa44dbbee6c96e0f9d4d9d (patch) | |
| tree | d0814e265b4ba099bf7fdd43e26da5acda882054 | |
| parent | 91cdda40714178497cbd182261b2ea6ec5cb9276 (diff) | |
| download | linux-c3480a603773cfc5d8aa44dbbee6c96e0f9d4d9d.tar.bz2 | |
bnxt_en: Add cache line size setting to optimize performance.
The chip supports 64-byte and 128-byte cache line size for more optimal
DMA performance when matched to the CPU cache line size. The default is 64.
If the system is using 128-byte cache line size, set it to 128.
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index ec8e623be0b0..77df92aa489d 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -5412,6 +5412,28 @@ static int bnxt_hwrm_set_br_mode(struct bnxt *bp, u16 br_mode) return rc; } +static int bnxt_hwrm_set_cache_line_size(struct bnxt *bp, int size) +{ + struct hwrm_func_cfg_input req = {0}; + int rc; + + if (BNXT_VF(bp) || bp->hwrm_spec_code < 0x10803) + return 0; + + bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_CFG, -1, -1); + req.fid = cpu_to_le16(0xffff); + req.enables = cpu_to_le32(FUNC_CFG_REQ_ENABLES_CACHE_LINESIZE); + req.cache_linesize = FUNC_QCFG_RESP_CACHE_LINESIZE_CACHE_LINESIZE_64; + if (size == 128) + req.cache_linesize = + FUNC_QCFG_RESP_CACHE_LINESIZE_CACHE_LINESIZE_128; + + rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); + if (rc) + rc = -EIO; + return rc; +} + static int bnxt_setup_vnic(struct bnxt *bp, u16 vnic_id) { struct bnxt_vnic_info *vnic = &bp->vnic_info[vnic_id]; @@ -8645,6 +8667,8 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) else device_set_wakeup_capable(&pdev->dev, false); + bnxt_hwrm_set_cache_line_size(bp, cache_line_size()); + if (BNXT_PF(bp)) { if (!bnxt_pf_wq) { bnxt_pf_wq = |