netdev - [RFC 11/19] staging: qlge: the number of pages to contain a buffer queue is constant

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Date:   Mon, 21 Jun 2021 21:48:54 +0800
From:   Coiby Xu <coiby.xu@...il.com>
To:     linux-staging@...ts.linux.dev
Cc:     netdev@...r.kernel.org,
        Benjamin Poirier <benjamin.poirier@...il.com>,
        Shung-Hsi Yu <shung-hsi.yu@...e.com>,
        Manish Chopra <manishc@...vell.com>,
        GR-Linux-NIC-Dev@...vell.com (supporter:QLOGIC QLGE 10Gb ETHERNET
        DRIVER), Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org (open list)
Subject: [RFC 11/19] staging: qlge: the number of pages to contain a buffer queue is constant

This patch is extented work of commit ec705b983b46b8e2d3cafd40c188458bf4241f11
("staging: qlge: Remove qlge_bq.len & size"). Since the same len is used
for both sbq (small buffer queue) and lbq (large buffer queue), the
number of pages to contain a buffer queue is also known at compile time.

Signed-off-by: Coiby Xu <coiby.xu@...il.com>
---
 drivers/staging/qlge/qlge.h      | 13 ++++++-------
 drivers/staging/qlge/qlge_main.c |  8 ++++----
 2 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/qlge/qlge.h b/drivers/staging/qlge/qlge.h
index 9177baa9f022..32755b0e2fb7 100644
--- a/drivers/staging/qlge/qlge.h
+++ b/drivers/staging/qlge/qlge.h
@@ -42,16 +42,15 @@
 
 #define DB_PAGE_SIZE 4096
 
-/* Calculate the number of (4k) pages required to
- * contain a buffer queue of the given length.
+/*
+ * The number of (4k) pages required to contain a buffer queue.
  */
-#define MAX_DB_PAGES_PER_BQ(x) \
-		(((x * sizeof(u64)) / DB_PAGE_SIZE) + \
-		(((x * sizeof(u64)) % DB_PAGE_SIZE) ? 1 : 0))
+#define MAX_DB_PAGES_PER_BQ \
+		(((QLGE_BQ_LEN * sizeof(u64)) / DB_PAGE_SIZE) + \
+		(((QLGE_BQ_LEN * sizeof(u64)) % DB_PAGE_SIZE) ? 1 : 0))
 
 #define RX_RING_SHADOW_SPACE	(sizeof(u64) + \
-		MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN) * sizeof(u64) + \
-		MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN) * sizeof(u64))
+		MAX_DB_PAGES_PER_BQ * sizeof(u64) * 2)
 #define LARGE_BUFFER_MAX_SIZE 4096
 #define LARGE_BUFFER_MIN_SIZE 2048
 
diff --git a/drivers/staging/qlge/qlge_main.c b/drivers/staging/qlge/qlge_main.c
index 94853b182608..7aee9e904097 100644
--- a/drivers/staging/qlge/qlge_main.c
+++ b/drivers/staging/qlge/qlge_main.c
@@ -3015,8 +3015,8 @@ static int qlge_start_cq(struct qlge_adapter *qdev, struct qlge_cq *cq)
 		shadow_reg_dma += sizeof(u64);
 		rx_ring->lbq.base_indirect = shadow_reg;
 		rx_ring->lbq.base_indirect_dma = shadow_reg_dma;
-		shadow_reg += (sizeof(u64) * MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN));
-		shadow_reg_dma += (sizeof(u64) * MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN));
+		shadow_reg += (sizeof(u64) * MAX_DB_PAGES_PER_BQ);
+		shadow_reg_dma += (sizeof(u64) * MAX_DB_PAGES_PER_BQ);
 		rx_ring->sbq.base_indirect = shadow_reg;
 		rx_ring->sbq.base_indirect_dma = shadow_reg_dma;
 		/* PCI doorbell mem area + 0x18 for large buffer consumer */
@@ -3034,7 +3034,7 @@ static int qlge_start_cq(struct qlge_adapter *qdev, struct qlge_cq *cq)
 			tmp += DB_PAGE_SIZE;
 			base_indirect_ptr++;
 			page_entries++;
-		} while (page_entries < MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN));
+		} while (page_entries < MAX_DB_PAGES_PER_BQ);
 		cqicb->lbq_addr = cpu_to_le64(rx_ring->lbq.base_indirect_dma);
 		cqicb->lbq_buf_size =
 			cpu_to_le16(QLGE_FIT16(qdev->lbq_buf_size));
@@ -3051,7 +3051,7 @@ static int qlge_start_cq(struct qlge_adapter *qdev, struct qlge_cq *cq)
 			tmp += DB_PAGE_SIZE;
 			base_indirect_ptr++;
 			page_entries++;
-		} while (page_entries < MAX_DB_PAGES_PER_BQ(QLGE_BQ_LEN));
+		} while (page_entries < MAX_DB_PAGES_PER_BQ);
 		cqicb->sbq_addr = cpu_to_le64(rx_ring->sbq.base_indirect_dma);
 		cqicb->sbq_buf_size = cpu_to_le16(QLGE_SMALL_BUFFER_SIZE);
 		cqicb->sbq_len = cpu_to_le16(QLGE_FIT16(QLGE_BQ_LEN));
-- 
2.32.0