netdev - [PATCH net-next 05/10] bnxt_en: Add BCM5760X specific PHC registers mapping

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Date: Wed, 26 Jun 2024 09:43:02 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	richardcochran@...il.com
Subject: [PATCH net-next 05/10] bnxt_en: Add BCM5760X specific PHC registers mapping

From: Pavan Chebbi <pavan.chebbi@...adcom.com>

BCM5760X firmware will advertise direct 64-bit PHC registers access
for the driver from BAR0.

Make the necessary changes in handling HWRM_PORT_MAC_PTP_QCFG's
response and PHC register mapping for 5760X chips.

Signed-off-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 12 ++++++++----
 drivers/net/ethernet/broadcom/bnxt/bnxt.h     |  8 ++++++++
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 10 +++++++++-
 3 files changed, 25 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index e16f50d822c8..93858df547b2 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9012,7 +9012,7 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 	u8 flags;
 	int rc;
 
-	if (bp->hwrm_spec_code < 0x10801 || !BNXT_CHIP_P5(bp)) {
+	if (bp->hwrm_spec_code < 0x10801 || !BNXT_CHIP_P5_PLUS(bp)) {
 		rc = -ENODEV;
 		goto no_ptp;
 	}
@@ -9028,7 +9028,8 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 		goto exit;
 
 	flags = resp->flags;
-	if (!(flags & PORT_MAC_PTP_QCFG_RESP_FLAGS_HWRM_ACCESS)) {
+	if (BNXT_CHIP_P5_AND_MINUS(bp) &&
+	    !(flags & PORT_MAC_PTP_QCFG_RESP_FLAGS_HWRM_ACCESS)) {
 		rc = -ENODEV;
 		goto exit;
 	}
@@ -9041,10 +9042,13 @@ static int __bnxt_hwrm_ptp_qcfg(struct bnxt *bp)
 		ptp->bp = bp;
 		bp->ptp_cfg = ptp;
 	}
-	if (flags & PORT_MAC_PTP_QCFG_RESP_FLAGS_PARTIAL_DIRECT_ACCESS_REF_CLOCK) {
+
+	if (flags &
+	    (PORT_MAC_PTP_QCFG_RESP_FLAGS_PARTIAL_DIRECT_ACCESS_REF_CLOCK |
+	     PORT_MAC_PTP_QCFG_RESP_FLAGS_64B_PHC_TIME)) {
 		ptp->refclk_regs[0] = le32_to_cpu(resp->ts_ref_clock_reg_lower);
 		ptp->refclk_regs[1] = le32_to_cpu(resp->ts_ref_clock_reg_upper);
-	} else if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS) {
+	} else if (BNXT_CHIP_P5(bp)) {
 		ptp->refclk_regs[0] = BNXT_TS_REG_TIMESYNC_TS0_LOWER;
 		ptp->refclk_regs[1] = BNXT_TS_REG_TIMESYNC_TS0_UPPER;
 	} else {
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 12d6d17936a9..82b05641953f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -2263,9 +2263,17 @@ struct bnxt {
 	 (BNXT_CHIP_NUM_58700((bp)->chip_num) &&	\
 	  !BNXT_CHIP_TYPE_NITRO_A0(bp)))
 
+/* Chip class phase 3.x */
+#define BNXT_CHIP_P3(bp)			\
+	(BNXT_CHIP_NUM_57X0X((bp)->chip_num) ||	\
+	 BNXT_CHIP_TYPE_NITRO_A0(bp))
+
 #define BNXT_CHIP_P4_PLUS(bp)			\
 	(BNXT_CHIP_P4(bp) || BNXT_CHIP_P5_PLUS(bp))
 
+#define BNXT_CHIP_P5_AND_MINUS(bp)		\
+	(BNXT_CHIP_P3(bp) || BNXT_CHIP_P4(bp) || BNXT_CHIP_P5(bp))
+
 	struct bnxt_aux_priv	*aux_priv;
 	struct bnxt_en_dev	*edev;
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 0ca7bc75616b..a3795ef8887d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -656,6 +656,14 @@ static int bnxt_map_ptp_regs(struct bnxt *bp)
 				(ptp->refclk_regs[i] & BNXT_GRC_OFFSET_MASK);
 		return 0;
 	}
+	if (bp->flags & BNXT_FLAG_CHIP_P7) {
+		for (i = 0; i < 2; i++) {
+			if (reg_arr[i] & BNXT_GRC_BASE_MASK)
+				return -EINVAL;
+			ptp->refclk_mapped_regs[i] = reg_arr[i];
+		}
+		return 0;
+	}
 	return -ENODEV;
 }
 
@@ -1018,7 +1026,7 @@ int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg)
 	ptp->stats.ts_lost = 0;
 	atomic64_set(&ptp->stats.ts_err, 0);
 
-	if (BNXT_CHIP_P5(bp)) {
+	if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS) {
 		spin_lock_bh(&ptp->ptp_lock);
 		bnxt_refclk_read(bp, NULL, &ptp->current_time);
 		WRITE_ONCE(ptp->old_time, ptp->current_time);
-- 
2.30.1


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