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From: Michael Chan <michael.chan@broadcom.com>
To: davem@davemloft.net
Cc: netdev@vger.kernel.org
Subject: [PATCH net-next 13/14] bnxt_en: Add cache line size setting to optimize performance.
Date: Wed, 17 Jan 2018 03:21:15 -0500	[thread overview]
Message-ID: <1516177276-9722-14-git-send-email-michael.chan@broadcom.com> (raw)
In-Reply-To: <1516177276-9722-1-git-send-email-michael.chan@broadcom.com>

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>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index ec8e623..77df92a 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 =
-- 
1.8.3.1

  parent reply	other threads:[~2018-01-17  8:21 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-17  8:21 [PATCH net-next 00/14] bnxt_en: Updates for net-next Michael Chan
2018-01-17  8:21 ` [PATCH net-next 01/14] bnxt_en: Update firmware interface to 1.9.0 Michael Chan
2018-01-17  8:21 ` [PATCH net-next 02/14] bnxt_en: Refactor bnxt_close_nic() Michael Chan
2018-01-17  8:21 ` [PATCH net-next 03/14] bnxt_en: Restore MSIX after disabling SRIOV Michael Chan
2018-01-17  8:21 ` [PATCH net-next 04/14] bnxt_en: Refactor hardware resource data structures Michael Chan
2018-01-17  8:21 ` [PATCH net-next 05/14] bnxt_en: Add the new firmware API to query hardware resources Michael Chan
2018-01-17  8:21 ` [PATCH net-next 06/14] bnxt_en: Set initial default RX and TX ring numbers the same in combined mode Michael Chan
2018-01-17  8:21 ` [PATCH net-next 07/14] bnxt_en: Implement new method to reserve rings Michael Chan
2018-01-17  8:21 ` [PATCH net-next 08/14] bnxt_en: Reserve resources for RFS Michael Chan
2018-01-17  8:21 ` [PATCH net-next 09/14] bnxt_en: Implement new method for the PF to assign SRIOV resources Michael Chan
2018-01-17  8:21 ` [PATCH net-next 10/14] bnxt_en: Expand bnxt_check_rings() to check all resources Michael Chan
2018-01-17  8:21 ` [PATCH net-next 11/14] bnxt_en: Add BCM5745X NPAR device IDs Michael Chan
2018-01-17  8:21 ` [PATCH net-next 12/14] bnxt_en: Forward VF MAC address to the PF Michael Chan
2018-01-17  8:21 ` Michael Chan [this message]
2018-01-17  8:21 ` [PATCH net-next 14/14] bnxt_en: export a common switchdev PARENT_ID for all reps of an adapter Michael Chan
2018-01-17 19:48 ` [PATCH net-next 00/14] bnxt_en: Updates for net-next David Miller

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