Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Oded Gabbay <oded.gabbay@gmail.com>
To:     linux-kernel@vger.kernel.org, SW_Drivers@habana.ai
Cc:     gregkh@linuxfoundation.org, Ofir Bitton <obitton@habana.ai>
Subject: [PATCH 4/7] habanalabs: Use mask instead of shift in sync stream registers
Date:   Tue, 16 Jun 2020 09:13:24 +0300
Message-Id: <20200616061327.12006-4-oded.gabbay@gmail.com>
In-Reply-To: <20200616061327.12006-1-oded.gabbay@gmail.com>
References: <20200616061327.12006-1-oded.gabbay@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Ofir Bitton <obitton@habana.ai>

Use proper bitfield masks instead of shifting values when configuring
packets sent to device.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/gaudi/gaudi.c         | 70 ++++++++++---------
 .../habanalabs/include/gaudi/gaudi_packets.h  |  4 +-
 2 files changed, 38 insertions(+), 36 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 9ce032466243..1ac7eb2498ef 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -21,6 +21,7 @@
 #include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/iommu.h>
 #include <linux/seq_file.h>
+#include <linux/bitfield.h>
 
 /*
  * Gaudi security scheme:
@@ -6289,16 +6290,17 @@ static void gaudi_gen_signal_cb(struct hl_device *hdev, void *data, u16 sob_id)
 	pkt = (struct packet_msg_short *) (uintptr_t) cb->kernel_address;
 	memset(pkt, 0, sizeof(*pkt));
 
-	value = 1 << GAUDI_PKT_SHORT_VAL_SOB_SYNC_VAL_SHIFT; /* inc by 1 */
-	value |= 1 << GAUDI_PKT_SHORT_VAL_SOB_MOD_SHIFT; /* add mode */
+	/* Inc by 1, Mode ADD */
+	value = FIELD_PREP(GAUDI_PKT_SHORT_VAL_SOB_SYNC_VAL_MASK, 1);
+	value |= FIELD_PREP(GAUDI_PKT_SHORT_VAL_SOB_MOD_MASK, 1);
 
-	ctl = (sob_id * 4) << GAUDI_PKT_SHORT_CTL_ADDR_SHIFT; /* SOB id */
-	ctl |= 0 << GAUDI_PKT_SHORT_CTL_OP_SHIFT; /* write the value */
-	ctl |= 3 << GAUDI_PKT_SHORT_CTL_BASE_SHIFT; /* W_S SOB base */
-	ctl |= PACKET_MSG_SHORT << GAUDI_PKT_SHORT_CTL_OPCODE_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_EB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_RB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_MB_SHIFT;
+	ctl = FIELD_PREP(GAUDI_PKT_SHORT_CTL_ADDR_MASK, sob_id * 4);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_OP_MASK, 0); /* write the value */
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_BASE_MASK, 3); /* W_S SOB base */
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_OPCODE_MASK, PACKET_MSG_SHORT);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_EB_MASK, 1);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_RB_MASK, 1);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_MB_MASK, 1);
 
 	pkt->value = cpu_to_le32(value);
 	pkt->ctl = cpu_to_le32(ctl);
@@ -6311,12 +6313,12 @@ static u32 gaudi_add_mon_msg_short(struct packet_msg_short *pkt, u32 value,
 
 	memset(pkt, 0, pkt_size);
 
-	ctl = addr << GAUDI_PKT_SHORT_CTL_ADDR_SHIFT;
-	ctl |= 2 << GAUDI_PKT_SHORT_CTL_BASE_SHIFT; /* W_S MON base */
-	ctl |= PACKET_MSG_SHORT << GAUDI_PKT_SHORT_CTL_OPCODE_SHIFT;
-	ctl |= 0 << GAUDI_PKT_SHORT_CTL_EB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_RB_SHIFT;
-	ctl |= 0 << GAUDI_PKT_SHORT_CTL_MB_SHIFT; /* only last pkt needs MB */
+	ctl = FIELD_PREP(GAUDI_PKT_SHORT_CTL_ADDR_MASK, addr);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_BASE_MASK, 2);  /* W_S MON base */
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_OPCODE_MASK, PACKET_MSG_SHORT);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_EB_MASK, 0);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_RB_MASK, 1);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_MB_MASK, 0); /* last pkt MB */
 
 	pkt->value = cpu_to_le32(value);
 	pkt->ctl = cpu_to_le32(ctl);
@@ -6332,18 +6334,19 @@ static u32 gaudi_add_arm_monitor_pkt(struct packet_msg_short *pkt, u16 sob_id,
 
 	memset(pkt, 0, pkt_size);
 
-	value = (sob_id / 8) << GAUDI_PKT_SHORT_VAL_MON_SYNC_GID_SHIFT;
-	value |= sob_val << GAUDI_PKT_SHORT_VAL_MON_SYNC_VAL_SHIFT;
-	value |= 0 << GAUDI_PKT_SHORT_VAL_MON_MODE_SHIFT; /* GREATER_OR_EQUAL */
-	value |= mask << GAUDI_PKT_SHORT_VAL_MON_MASK_SHIFT;
+	value = FIELD_PREP(GAUDI_PKT_SHORT_VAL_MON_SYNC_GID_MASK, sob_id / 8);
+	value |= FIELD_PREP(GAUDI_PKT_SHORT_VAL_MON_SYNC_VAL_MASK, sob_val);
+	value |= FIELD_PREP(GAUDI_PKT_SHORT_VAL_MON_MODE_MASK,
+			0); /* GREATER OR EQUAL*/
+	value |= FIELD_PREP(GAUDI_PKT_SHORT_VAL_MON_MASK_MASK, mask);
 
-	ctl = addr << GAUDI_PKT_SHORT_CTL_ADDR_SHIFT;
-	ctl |= 0 << GAUDI_PKT_SHORT_CTL_OP_SHIFT; /* write the value */
-	ctl |= 2 << GAUDI_PKT_SHORT_CTL_BASE_SHIFT; /* W_S MON base */
-	ctl |= PACKET_MSG_SHORT << GAUDI_PKT_SHORT_CTL_OPCODE_SHIFT;
-	ctl |= 0 << GAUDI_PKT_SHORT_CTL_EB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_RB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_SHORT_CTL_MB_SHIFT;
+	ctl = FIELD_PREP(GAUDI_PKT_SHORT_CTL_ADDR_MASK, addr);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_OP_MASK, 0); /* write the value */
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_BASE_MASK, 2); /* W_S MON base */
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_OPCODE_MASK, PACKET_MSG_SHORT);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_EB_MASK, 0);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_RB_MASK, 1);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_MB_MASK, 1);
 
 	pkt->value = cpu_to_le32(value);
 	pkt->ctl = cpu_to_le32(ctl);
@@ -6357,15 +6360,14 @@ static u32 gaudi_add_fence_pkt(struct packet_fence *pkt)
 
 	memset(pkt, 0, pkt_size);
 
-	cfg = 1 << GAUDI_PKT_FENCE_CFG_DEC_VAL_SHIFT;
-	cfg |= 1 << GAUDI_PKT_FENCE_CFG_TARGET_VAL_SHIFT;
-	cfg |= 2 << GAUDI_PKT_FENCE_CFG_ID_SHIFT;
+	cfg = FIELD_PREP(GAUDI_PKT_FENCE_CFG_DEC_VAL_MASK, 1);
+	cfg |= FIELD_PREP(GAUDI_PKT_FENCE_CFG_TARGET_VAL_MASK, 1);
+	cfg |= FIELD_PREP(GAUDI_PKT_FENCE_CFG_ID_MASK, 2);
 
-	ctl = 0 << GAUDI_PKT_FENCE_CTL_PRED_SHIFT;
-	ctl |= PACKET_FENCE << GAUDI_PKT_FENCE_CTL_OPCODE_SHIFT;
-	ctl |= 0 << GAUDI_PKT_FENCE_CTL_EB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_FENCE_CTL_RB_SHIFT;
-	ctl |= 1 << GAUDI_PKT_FENCE_CTL_MB_SHIFT;
+	ctl = FIELD_PREP(GAUDI_PKT_FENCE_CTL_OPCODE_MASK, PACKET_FENCE);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_EB_MASK, 0);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_RB_MASK, 1);
+	ctl |= FIELD_PREP(GAUDI_PKT_SHORT_CTL_MB_MASK, 1);
 
 	pkt->cfg = cpu_to_le32(cfg);
 	pkt->ctl = cpu_to_le32(ctl);
diff --git a/drivers/misc/habanalabs/include/gaudi/gaudi_packets.h b/drivers/misc/habanalabs/include/gaudi/gaudi_packets.h
index 9a5800b0086b..02d62bc53f7f 100644
--- a/drivers/misc/habanalabs/include/gaudi/gaudi_packets.h
+++ b/drivers/misc/habanalabs/include/gaudi/gaudi_packets.h
@@ -85,7 +85,7 @@ struct packet_msg_long {
 };
 
 #define GAUDI_PKT_SHORT_VAL_SOB_SYNC_VAL_SHIFT	0
-#define GAUDI_PKT_SHORT_VAL_SOB_SYNC_VAL_MASK	0x0000EFFF
+#define GAUDI_PKT_SHORT_VAL_SOB_SYNC_VAL_MASK	0x00007FFF
 
 #define GAUDI_PKT_SHORT_VAL_SOB_MOD_SHIFT	31
 #define GAUDI_PKT_SHORT_VAL_SOB_MOD_MASK	0x80000000
@@ -141,7 +141,7 @@ struct packet_msg_prot {
 #define GAUDI_PKT_FENCE_CFG_TARGET_VAL_MASK	0x00FF0000
 
 #define GAUDI_PKT_FENCE_CFG_ID_SHIFT		30
-#define GAUDI_PKT_FENCE_CFG_ID_MASK		0xC000000
+#define GAUDI_PKT_FENCE_CFG_ID_MASK		0xC0000000
 
 #define GAUDI_PKT_FENCE_CTL_PRED_SHIFT		0
 #define GAUDI_PKT_FENCE_CTL_PRED_MASK		0x0000001F
-- 
2.17.1