Merge branch 'bnxt_en-updates'

Michael Chan says:

====================
bnxt_en: Updates

This small patchset adds an improvement to the configuration of ethtool
RSS tuple hash and a PTP improvement when running in a multi-host
environment.
====================

Link: https://lore.kernel.org/r/1667780192-3700-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

6 files changed, 142 insertions, 33 deletions

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 03272aa48511..d9ad325f7840 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -5250,7 +5250,7 @@ int bnxt_get_nr_rss_ctxs(struct bnxt *bp, int rx_rings)
 	return 1;
 }
 
-static void __bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
+static void bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
 {
 	bool no_rss = !(vnic->flags & BNXT_VNIC_RSS_FLAG);
 	u16 i, j;
@@ -5263,8 +5263,8 @@ static void __bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
 	}
 }
 
-static void __bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
-				      struct bnxt_vnic_info *vnic)
+static void bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
+				    struct bnxt_vnic_info *vnic)
 {
 	__le16 *ring_tbl = vnic->rss_table;
 	struct bnxt_rx_ring_info *rxr;
@@ -5285,12 +5285,27 @@ static void __bnxt_fill_hw_rss_tbl_p5(struct bnxt *bp,
 	}
 }
 
-static void bnxt_fill_hw_rss_tbl(struct bnxt *bp, struct bnxt_vnic_info *vnic)
+static void
+__bnxt_hwrm_vnic_set_rss(struct bnxt *bp, struct hwrm_vnic_rss_cfg_input *req,
+			 struct bnxt_vnic_info *vnic)
 {
 	if (bp->flags & BNXT_FLAG_CHIP_P5)
-		__bnxt_fill_hw_rss_tbl_p5(bp, vnic);
+		bnxt_fill_hw_rss_tbl_p5(bp, vnic);
 	else
-		__bnxt_fill_hw_rss_tbl(bp, vnic);
+		bnxt_fill_hw_rss_tbl(bp, vnic);
+
+	if (bp->rss_hash_delta) {
+		req->hash_type = cpu_to_le32(bp->rss_hash_delta);
+		if (bp->rss_hash_cfg & bp->rss_hash_delta)
+			req->flags |= VNIC_RSS_CFG_REQ_FLAGS_HASH_TYPE_INCLUDE;
+		else
+			req->flags |= VNIC_RSS_CFG_REQ_FLAGS_HASH_TYPE_EXCLUDE;
+	} else {
+		req->hash_type = cpu_to_le32(bp->rss_hash_cfg);
+	}
+	req->hash_mode_flags = VNIC_RSS_CFG_REQ_HASH_MODE_FLAGS_DEFAULT;
+	req->ring_grp_tbl_addr = cpu_to_le64(vnic->rss_table_dma_addr);
+	req->hash_key_tbl_addr = cpu_to_le64(vnic->rss_hash_key_dma_addr);
 }
 
 static int bnxt_hwrm_vnic_set_rss(struct bnxt *bp, u16 vnic_id, bool set_rss)
@@ -5307,14 +5322,8 @@ static int bnxt_hwrm_vnic_set_rss(struct bnxt *bp, u16 vnic_id, bool set_rss)
 	if (rc)
 		return rc;
 
-	if (set_rss) {
-		bnxt_fill_hw_rss_tbl(bp, vnic);
-		req->hash_type = cpu_to_le32(bp->rss_hash_cfg);
-		req->hash_mode_flags = VNIC_RSS_CFG_REQ_HASH_MODE_FLAGS_DEFAULT;
-		req->ring_grp_tbl_addr = cpu_to_le64(vnic->rss_table_dma_addr);
-		req->hash_key_tbl_addr =
-			cpu_to_le64(vnic->rss_hash_key_dma_addr);
-	}
+	if (set_rss)
+		__bnxt_hwrm_vnic_set_rss(bp, req, vnic);
 	req->rss_ctx_idx = cpu_to_le16(vnic->fw_rss_cos_lb_ctx[0]);
 	return hwrm_req_send(bp, req);
 }
@@ -5335,10 +5344,7 @@ static int bnxt_hwrm_vnic_set_rss_p5(struct bnxt *bp, u16 vnic_id, bool set_rss)
 	if (!set_rss)
 		return hwrm_req_send(bp, req);
 
-	bnxt_fill_hw_rss_tbl(bp, vnic);
-	req->hash_type = cpu_to_le32(bp->rss_hash_cfg);
-	req->hash_mode_flags = VNIC_RSS_CFG_REQ_HASH_MODE_FLAGS_DEFAULT;
-	req->hash_key_tbl_addr = cpu_to_le64(vnic->rss_hash_key_dma_addr);
+	__bnxt_hwrm_vnic_set_rss(bp, req, vnic);
 	ring_tbl_map = vnic->rss_table_dma_addr;
 	nr_ctxs = bnxt_get_nr_rss_ctxs(bp, bp->rx_nr_rings);
 
@@ -5357,6 +5363,25 @@ exit:
 	return rc;
 }
 
+static void bnxt_hwrm_update_rss_hash_cfg(struct bnxt *bp)
+{
+	struct bnxt_vnic_info *vnic = &bp->vnic_info[0];
+	struct hwrm_vnic_rss_qcfg_output *resp;
+	struct hwrm_vnic_rss_qcfg_input *req;
+
+	if (hwrm_req_init(bp, req, HWRM_VNIC_RSS_QCFG))
+		return;
+
+	/* all contexts configured to same hash_type, zero always exists */
+	req->rss_ctx_idx = cpu_to_le16(vnic->fw_rss_cos_lb_ctx[0]);
+	resp = hwrm_req_hold(bp, req);
+	if (!hwrm_req_send(bp, req)) {
+		bp->rss_hash_cfg = le32_to_cpu(resp->hash_type) ?: bp->rss_hash_cfg;
+		bp->rss_hash_delta = 0;
+	}
+	hwrm_req_drop(bp, req);
+}
+
 static int bnxt_hwrm_vnic_set_hds(struct bnxt *bp, u16 vnic_id)
 {
 	struct bnxt_vnic_info *vnic = &bp->vnic_info[vnic_id];
@@ -5614,6 +5639,8 @@ static int bnxt_hwrm_vnic_qcaps(struct bnxt *bp)
 		    (BNXT_CHIP_P5_THOR(bp) &&
 		     !(bp->fw_cap & BNXT_FW_CAP_EXT_HW_STATS_SUPPORTED)))
 			bp->fw_cap |= BNXT_FW_CAP_VLAN_RX_STRIP;
+		if (flags & VNIC_QCAPS_RESP_FLAGS_RSS_HASH_TYPE_DELTA_CAP)
+			bp->fw_cap |= BNXT_FW_CAP_RSS_HASH_TYPE_DELTA;
 		bp->max_tpa_v2 = le16_to_cpu(resp->max_aggs_supported);
 		if (bp->max_tpa_v2) {
 			if (BNXT_CHIP_P5_THOR(bp))
@@ -6958,8 +6985,11 @@ static int bnxt_hwrm_func_qcfg(struct bnxt *bp)
 		if (flags & FUNC_QCFG_RESP_FLAGS_FW_DCBX_AGENT_ENABLED)
 			bp->fw_cap |= BNXT_FW_CAP_DCBX_AGENT;
 	}
-	if (BNXT_PF(bp) && (flags & FUNC_QCFG_RESP_FLAGS_MULTI_HOST))
+	if (BNXT_PF(bp) && (flags & FUNC_QCFG_RESP_FLAGS_MULTI_HOST)) {
 		bp->flags |= BNXT_FLAG_MULTI_HOST;
+		if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC)
+			bp->fw_cap &= ~BNXT_FW_CAP_PTP_RTC;
+	}
 	if (flags & FUNC_QCFG_RESP_FLAGS_RING_MONITOR_ENABLED)
 		bp->fw_cap |= BNXT_FW_CAP_RING_MONITOR;
 
@@ -8808,6 +8838,8 @@ static int bnxt_init_chip(struct bnxt *bp, bool irq_re_init)
 	rc = bnxt_setup_vnic(bp, 0);
 	if (rc)
 		goto err_out;
+	if (bp->fw_cap & BNXT_FW_CAP_RSS_HASH_TYPE_DELTA)
+		bnxt_hwrm_update_rss_hash_cfg(bp);
 
 	if (bp->flags & BNXT_FLAG_RFS) {
 		rc = bnxt_alloc_rfs_vnics(bp);
@@ -12243,6 +12275,8 @@ static void bnxt_set_dflt_rss_hash_type(struct bnxt *bp)
 			   VNIC_RSS_CFG_REQ_HASH_TYPE_TCP_IPV4 |
 			   VNIC_RSS_CFG_REQ_HASH_TYPE_IPV6 |
 			   VNIC_RSS_CFG_REQ_HASH_TYPE_TCP_IPV6;
+	if (bp->fw_cap & BNXT_FW_CAP_RSS_HASH_TYPE_DELTA)
+		bp->rss_hash_delta = bp->rss_hash_cfg;
 	if (BNXT_CHIP_P4_PLUS(bp) && bp->hwrm_spec_code >= 0x10501) {
 		bp->flags |= BNXT_FLAG_UDP_RSS_CAP;
 		bp->rss_hash_cfg |= VNIC_RSS_CFG_REQ_HASH_TYPE_UDP_IPV4 |
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 91a1ba0a914d..7611bed4a196 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1900,6 +1900,7 @@ struct bnxt {
 	u16			*rss_indir_tbl;
 	u16			rss_indir_tbl_entries;
 	u32			rss_hash_cfg;
+	u32			rss_hash_delta;
 
 	u16			max_mtu;
 	u8			max_tc;
@@ -1965,6 +1966,7 @@ struct bnxt {
 	#define BNXT_FW_CAP_CFA_RFS_RING_TBL_IDX_V2	0x00010000
 	#define BNXT_FW_CAP_PCIE_STATS_SUPPORTED	0x00020000
 	#define BNXT_FW_CAP_EXT_STATS_SUPPORTED		0x00040000
+	#define BNXT_FW_CAP_RSS_HASH_TYPE_DELTA		0x00080000
 	#define BNXT_FW_CAP_ERR_RECOVER_RELOAD		0x00100000
 	#define BNXT_FW_CAP_HOT_RESET			0x00200000
 	#define BNXT_FW_CAP_PTP_RTC			0x00400000
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index d8f0351df954..132e4f56816e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1234,6 +1234,8 @@ static int bnxt_srxfh(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 	if (bp->rss_hash_cfg == rss_hash_cfg)
 		return 0;
 
+	if (bp->fw_cap & BNXT_FW_CAP_RSS_HASH_TYPE_DELTA)
+		bp->rss_hash_delta = bp->rss_hash_cfg ^ rss_hash_cfg;
 	bp->rss_hash_cfg = rss_hash_cfg;
 	if (netif_running(bp->dev)) {
 		bnxt_close_nic(bp, false, false);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h
index 184dd8d11cd3..2686a714a59f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_hsi.h
@@ -6768,6 +6768,53 @@ struct hwrm_vnic_rss_cfg_cmd_err {
 	u8	unused_0[7];
 };
 
+/* hwrm_vnic_rss_qcfg_input (size:192b/24B) */
+struct hwrm_vnic_rss_qcfg_input {
+	__le16	req_type;
+	__le16	cmpl_ring;
+	__le16	seq_id;
+	__le16	target_id;
+	__le64	resp_addr;
+	__le16	rss_ctx_idx;
+	__le16	vnic_id;
+	u8	unused_0[4];
+};
+
+/* hwrm_vnic_rss_qcfg_output (size:512b/64B) */
+struct hwrm_vnic_rss_qcfg_output {
+	__le16	error_code;
+	__le16	req_type;
+	__le16	seq_id;
+	__le16	resp_len;
+	__le32	hash_type;
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_IPV4                0x1UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_TCP_IPV4            0x2UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_UDP_IPV4            0x4UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_IPV6                0x8UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_TCP_IPV6            0x10UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_UDP_IPV6            0x20UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_IPV6_FLOW_LABEL     0x40UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_AH_SPI_IPV4         0x80UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_ESP_SPI_IPV4        0x100UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_AH_SPI_IPV6         0x200UL
+	#define VNIC_RSS_QCFG_RESP_HASH_TYPE_ESP_SPI_IPV6        0x400UL
+	u8	unused_0[4];
+	__le32	hash_key[10];
+	u8	hash_mode_flags;
+	#define VNIC_RSS_QCFG_RESP_HASH_MODE_FLAGS_DEFAULT         0x1UL
+	#define VNIC_RSS_QCFG_RESP_HASH_MODE_FLAGS_INNERMOST_4     0x2UL
+	#define VNIC_RSS_QCFG_RESP_HASH_MODE_FLAGS_INNERMOST_2     0x4UL
+	#define VNIC_RSS_QCFG_RESP_HASH_MODE_FLAGS_OUTERMOST_4     0x8UL
+	#define VNIC_RSS_QCFG_RESP_HASH_MODE_FLAGS_OUTERMOST_2     0x10UL
+	u8	ring_select_mode;
+	#define VNIC_RSS_QCFG_RESP_RING_SELECT_MODE_TOEPLITZ          0x0UL
+	#define VNIC_RSS_QCFG_RESP_RING_SELECT_MODE_XOR               0x1UL
+	#define VNIC_RSS_QCFG_RESP_RING_SELECT_MODE_TOEPLITZ_CHECKSUM 0x2UL
+	#define VNIC_RSS_QCFG_RESP_RING_SELECT_MODE_LAST             VNIC_RSS_QCFG_RESP_RING_SELECT_MODE_TOEPLITZ_CHECKSUM
+	u8	unused_1[5];
+	u8	valid;
+};
+
 /* hwrm_vnic_plcmodes_cfg_input (size:320b/40B) */
 struct hwrm_vnic_plcmodes_cfg_input {
 	__le16	req_type;
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 2132ce63193c..460cb20599f6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -14,6 +14,7 @@
 #include <linux/net_tstamp.h>
 #include <linux/timekeeping.h>
 #include <linux/ptp_classify.h>
+#include <linux/clocksource.h>
 #include "bnxt_hsi.h"
 #include "bnxt.h"
 #include "bnxt_hwrm.h"
@@ -210,18 +211,37 @@ static int bnxt_ptp_adjfreq(struct ptp_clock_info *ptp_info, s32 ppb)
 						ptp_info);
 	struct hwrm_port_mac_cfg_input *req;
 	struct bnxt *bp = ptp->bp;
-	int rc;
+	int rc = 0;
 
-	rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG);
-	if (rc)
-		return rc;
+	if (!(ptp->bp->fw_cap & BNXT_FW_CAP_PTP_RTC)) {
+		int neg_adj = 0;
+		u32 diff;
+		u64 adj;
 
-	req->ptp_freq_adj_ppb = cpu_to_le32(ppb);
-	req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
-	rc = hwrm_req_send(ptp->bp, req);
-	if (rc)
-		netdev_err(ptp->bp->dev,
-			   "ptp adjfreq failed. rc = %d\n", rc);
+		if (ppb < 0) {
+			neg_adj = 1;
+			ppb = -ppb;
+		}
+		adj = ptp->cmult;
+		adj *= ppb;
+		diff = div_u64(adj, 1000000000ULL);
+
+		spin_lock_bh(&ptp->ptp_lock);
+		timecounter_read(&ptp->tc);
+		ptp->cc.mult = neg_adj ? ptp->cmult - diff : ptp->cmult + diff;
+		spin_unlock_bh(&ptp->ptp_lock);
+	} else {
+		rc = hwrm_req_init(bp, req, HWRM_PORT_MAC_CFG);
+		if (rc)
+			return rc;
+
+		req->ptp_freq_adj_ppb = cpu_to_le32(ppb);
+		req->enables = cpu_to_le32(PORT_MAC_CFG_REQ_ENABLES_PTP_FREQ_ADJ_PPB);
+		rc = hwrm_req_send(ptp->bp, req);
+		if (rc)
+			netdev_err(ptp->bp->dev,
+				   "ptp adjfreq failed. rc = %d\n", rc);
+	}
 	return rc;
 }
 
@@ -846,8 +866,9 @@ static void bnxt_ptp_timecounter_init(struct bnxt *bp, bool init_tc)
 		memset(&ptp->cc, 0, sizeof(ptp->cc));
 		ptp->cc.read = bnxt_cc_read;
 		ptp->cc.mask = CYCLECOUNTER_MASK(48);
-		ptp->cc.shift = 0;
-		ptp->cc.mult = 1;
+		ptp->cc.shift = BNXT_CYCLES_SHIFT;
+		ptp->cc.mult = clocksource_khz2mult(BNXT_DEVCLK_FREQ, ptp->cc.shift);
+		ptp->cmult = ptp->cc.mult;
 		ptp->next_overflow_check = jiffies + BNXT_PHC_OVERFLOW_PERIOD;
 	}
 	if (init_tc)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
index 4ce0a14c1e23..34162e07a119 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
@@ -17,6 +17,8 @@
 #define BNXT_PTP_GRC_WIN_BASE	0x6000
 
 #define BNXT_MAX_PHC_DRIFT	31000000
+#define BNXT_CYCLES_SHIFT	23
+#define BNXT_DEVCLK_FREQ	1000000
 #define BNXT_LO_TIMER_MASK	0x0000ffffffffUL
 #define BNXT_HI_TIMER_MASK	0xffff00000000UL
 
@@ -88,8 +90,9 @@ struct bnxt_ptp_cfg {
 	u64			old_time;
 	unsigned long		next_period;
 	unsigned long		next_overflow_check;
-	/* 48-bit PHC overflows in 78 hours.  Check overflow every 19 hours. */
-	#define BNXT_PHC_OVERFLOW_PERIOD	(19 * 3600 * HZ)
+	u32			cmult;
+	/* a 23b shift cyclecounter will overflow in ~36 mins.  Check overflow every 18 mins. */
+	#define BNXT_PHC_OVERFLOW_PERIOD	(18 * 60 * HZ)
 
 	u16			tx_seqid;
 	u16			tx_hdr_off;