[PATCH net-next 8/9] net: atlantic: extend hw_ops and TX descriptor for AQC113 PTP for AQC113 PTP

[<sukhdeeps@marvell.com>]

From: Sukhdeep Singh <sukhdeeps@marvell.com>

Extend the aq_hw_ops interface with new function pointers required for
PTP support on AQC113:
- enable_ptp: enable/disable PTP counter with clock selection
- hw_ring_tx_ptp_get_ts: read TX timestamp from descriptor writeback
- hw_tx_ptp_ring_init/hw_rx_ptp_ring_init: per-ring PTP initialization
- hw_get_clk_sel: query active TSG clock selection

Update existing hw_ops signatures to support AQC113 dual-clock
architecture:
- hw_gpio_pulse: add clk_sel and hightime parameters
- hw_extts_gpio_enable: add channel parameter

Add PTP-related hardware defines:
- AQ_HW_TXD_CTL_TS_EN/TS_TSG0 for TX descriptor timestamp control
- AQ2_HW_PTP_COUNTER_HZ for AQC113 TSG clock frequency
- AQ_HW_PTP_IRQS for PTP interrupt vector accounting
- PTP enable flags (L2/L4) and TSG clock selection constants

Add request_ts and clk_sel bitfields to aq_ring_buff_s for per-packet
TX timestamp request tracking.

Update hw_atl_b0.c (AQC107) implementations:
- Adapt gpio_pulse and extts_gpio_enable to new signatures
- Add TX descriptor timestamp bits for AQC113 when ANTIGUA chip
  feature is detected

Signed-off-by: Sukhdeep Singh <sukhdeeps@marvell.com>
---
 .../net/ethernet/aquantia/atlantic/aq_hw.h    | 34 +++++++++++++++++--
 .../net/ethernet/aquantia/atlantic/aq_ptp.c   |  4 +--
 .../net/ethernet/aquantia/atlantic/aq_ring.h  |  4 ++-
 .../aquantia/atlantic/hw_atl/hw_atl_b0.c      | 15 ++++++--
 4 files changed, 48 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
index 04fb87d4e56d..e3bacad08b93 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
@@ -19,6 +19,9 @@
 #define AQ_HW_MAC_COUNTER_HZ   312500000ll
 #define AQ_HW_PHY_COUNTER_HZ   160000000ll
 
+#define AQ_HW_TXD_CTL_TS_EN       0x40000000U
+#define AQ_HW_TXD_CTL_TS_TSG0     0x80000000U
+
 enum aq_tc_mode {
 	AQ_TC_MODE_INVALID = -1,
 	AQ_TC_MODE_8TCS,
@@ -38,6 +41,8 @@ enum aq_tc_mode {
 
 #define AQ_FRAC_PER_NS 0x100000000LL
 
+#define AQ2_HW_PTP_COUNTER_HZ   156250000ll
+
 /* Used for rate to Mbps conversion */
 #define AQ_MBPS_DIVISOR         125000 /* 1000000 / 8 */
 
@@ -109,6 +114,7 @@ struct aq_stats_s {
 #define AQ_HW_IRQ_MSIX    3U
 
 #define AQ_HW_SERVICE_IRQS   1U
+#define AQ_HW_PTP_IRQS       1U
 
 #define AQ_HW_POWER_STATE_D0   0U
 #define AQ_HW_POWER_STATE_D3   3U
@@ -157,6 +163,15 @@ enum aq_priv_flags {
 	AQ_HW_LOOPBACK_PHYEXT_SYS,
 };
 
+enum {
+	AQ_HW_PTP_DISABLE = 0,
+	AQ_HW_PTP_L2_ENABLE = BIT(1),
+	AQ_HW_PTP_L4_ENABLE = BIT(2),
+};
+
+#define ATL_TSG_CLOCK_SEL_0 0
+#define ATL_TSG_CLOCK_SEL_1 1
+
 #define AQ_HW_LOOPBACK_MASK	(BIT(AQ_HW_LOOPBACK_DMA_SYS) |\
 				 BIT(AQ_HW_LOOPBACK_PKT_SYS) |\
 				 BIT(AQ_HW_LOOPBACK_DMA_NET) |\
@@ -198,6 +213,7 @@ struct aq_hw_s {
 	u32 rpc_tid;
 	struct hw_atl_utils_fw_rpc rpc;
 	s64 ptp_clk_offset;
+	s8 clk_select;
 	u16 phy_id;
 	void *priv;
 };
@@ -325,11 +341,15 @@ struct aq_hw_ops {
 
 	int (*hw_ts_to_sys_clock)(struct aq_hw_s *self, u64 ts, u64 *time);
 
-	int (*hw_gpio_pulse)(struct aq_hw_s *self, u32 index, u64 start,
-			     u32 period);
+	int (*hw_gpio_pulse)(struct aq_hw_s *self, u32 index,
+			     u32 clk_sel, u64 start,
+			     u32 period, u32 hightime);
 
 	int (*hw_extts_gpio_enable)(struct aq_hw_s *self, u32 index,
-				    u32 enable);
+				    u32 channel, int enable);
+
+	void (*enable_ptp)(struct aq_hw_s *self, unsigned int param,
+			   int enable);
 
 	int (*hw_get_sync_ts)(struct aq_hw_s *self, u64 *ts);
 
@@ -339,6 +359,14 @@ struct aq_hw_ops {
 	int (*extract_hwts)(struct aq_hw_s *self, u8 *p, unsigned int len,
 			    u64 *timestamp);
 
+	u64 (*hw_ring_tx_ptp_get_ts)(struct aq_ring_s *ring);
+
+	int (*hw_tx_ptp_ring_init)(struct aq_hw_s *self,
+				   struct aq_ring_s *aq_ring);
+	int (*hw_rx_ptp_ring_init)(struct aq_hw_s *self,
+				   struct aq_ring_s *aq_ring);
+	u32 (*hw_get_clk_sel)(struct aq_hw_s *self);
+
 	int (*hw_set_fc)(struct aq_hw_s *self, u32 fc, u32 tc);
 
 	int (*hw_set_loopback)(struct aq_hw_s *self, u32 mode, bool enable);
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c
index 9df8918216f6..7486a28d7ff8 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ptp.c
@@ -380,7 +380,7 @@ static int aq_ptp_hw_pin_conf(struct aq_nic_s *aq_nic, u32 pin_index, u64 start,
 	 */
 	mutex_lock(&aq_nic->fwreq_mutex);
 	aq_nic->aq_hw_ops->hw_gpio_pulse(aq_nic->aq_hw, pin_index,
-					 start, (u32)period);
+					 0, start, (u32)period, 0);
 	mutex_unlock(&aq_nic->fwreq_mutex);
 
 	return 0;
@@ -454,7 +454,7 @@ static void aq_ptp_extts_pin_ctrl(struct aq_ptp_s *aq_ptp)
 
 	if (aq_nic->aq_hw_ops->hw_extts_gpio_enable)
 		aq_nic->aq_hw_ops->hw_extts_gpio_enable(aq_nic->aq_hw, 0,
-							enable);
+							0, enable);
 }
 
 static int aq_ptp_extts_pin_configure(struct ptp_clock_info *ptp,
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
index d627ace850ff..e578fe04d22c 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
@@ -85,7 +85,9 @@ struct __packed aq_ring_buff_s {
 			u32 is_error:1;
 			u32 is_vlan:1;
 			u32 is_lro:1;
-			u32 rsvd3:3;
+			u32 request_ts:1;
+			u32 clk_sel:1;
+			u32 rsvd3:1;
 			u16 eop_index;
 			u16 rsvd4;
 		};
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index c7895bfb2ecf..6c25ad264b19 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -736,6 +736,15 @@ int hw_atl_b0_hw_ring_tx_xmit(struct aq_hw_s *self, struct aq_ring_s *ring,
 				txd->ctl |= HW_ATL_B0_TXD_CTL_CMD_WB;
 				is_gso = false;
 				is_vlan = false;
+
+				if (ATL_HW_IS_CHIP_FEATURE(self, ANTIGUA) &&
+				    unlikely(buff->request_ts)) {
+					txd->ctl |= AQ_HW_TXD_CTL_TS_EN;
+					if (buff->clk_sel != ATL_TSG_CLOCK_SEL_1)
+						txd->ctl |= AQ_HW_TXD_CTL_TS_TSG0;
+					/* The only DD+TS is required */
+					txd->ctl &= ~HW_ATL_B0_TXD_CTL_CMD_WB;
+				}
 			}
 		}
 		ring->sw_tail = aq_ring_next_dx(ring, ring->sw_tail);
@@ -1323,8 +1332,8 @@ static int hw_atl_b0_adj_clock_freq(struct aq_hw_s *self, s32 ppb)
 	return self->aq_fw_ops->send_fw_request(self, &fwreq, size);
 }
 
-static int hw_atl_b0_gpio_pulse(struct aq_hw_s *self, u32 index,
-				u64 start, u32 period)
+static int hw_atl_b0_gpio_pulse(struct aq_hw_s *self, u32 index, u32 clk_sel,
+				u64 start, u32 period, u32 hightime)
 {
 	struct hw_fw_request_iface fwreq;
 	size_t size;
@@ -1342,7 +1351,7 @@ static int hw_atl_b0_gpio_pulse(struct aq_hw_s *self, u32 index,
 }
 
 static int hw_atl_b0_extts_gpio_enable(struct aq_hw_s *self, u32 index,
-				       u32 enable)
+				       u32 channel, int enable)
 {
 	/* Enable/disable Sync1588 GPIO Timestamping */
 	aq_phy_write_reg(self, MDIO_MMD_PCS, 0xc611, enable ? 0x71 : 0);
-- 
2.43.0