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Date: Wed, 12 Aug 2009 21:23:44 +0300
From: "Eilon Greenstein" <eilong@...adcom.com>
To: "David Miller" <davem@...emloft.net>
cc: netdev@...r.kernel.org, "Benjamin Li" <benli@...adcom.com>
Subject: [net-next 23/36] bnx2x: Remove the init_dmae field from bp
Moved the dmae_command from the heap to the stack. This will save 56
bytes per bnx2x structure. As a side benefit, we can also reduce the
time the dmae_mutex is held. This is because do we not need to hold
this mutex when setting up the dmae command. The memory where is dmae
command is stored is not a shared resource and doesn not need to be
protected.
Signed-off-by: Benjamin Li <benli@...adcom.com>
Signed-off-by: Eilon Greenstein <eilong@...adcom.com>
---
drivers/net/bnx2x.h | 1 -
drivers/net/bnx2x_main.c | 94 +++++++++++++++++++++++-----------------------
2 files changed, 47 insertions(+), 48 deletions(-)
diff --git a/drivers/net/bnx2x.h b/drivers/net/bnx2x.h
index 633acca..a231780 100644
--- a/drivers/net/bnx2x.h
+++ b/drivers/net/bnx2x.h
@@ -973,7 +973,6 @@ struct bnx2x {
int dmae_ready;
/* used to synchronize dmae accesses */
struct mutex dmae_mutex;
- struct dmae_command init_dmae;
/* used to synchronize stats collecting */
int stats_state;
diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c
index dd9a77f..cfcc4ee 100644
--- a/drivers/net/bnx2x_main.c
+++ b/drivers/net/bnx2x_main.c
@@ -203,7 +203,7 @@ static void bnx2x_post_dmae(struct bnx2x *bp, struct dmae_command *dmae,
void bnx2x_write_dmae(struct bnx2x *bp, dma_addr_t dma_addr, u32 dst_addr,
u32 len32)
{
- struct dmae_command *dmae = &bp->init_dmae;
+ struct dmae_command dmae;
u32 *wb_comp = bnx2x_sp(bp, wb_comp);
int cnt = 200;
@@ -216,43 +216,43 @@ void bnx2x_write_dmae(struct bnx2x *bp, dma_addr_t dma_addr, u32 dst_addr,
return;
}
- mutex_lock(&bp->dmae_mutex);
-
- memset(dmae, 0, sizeof(struct dmae_command));
+ memset(&dmae, 0, sizeof(struct dmae_command));
- dmae->opcode = (DMAE_CMD_SRC_PCI | DMAE_CMD_DST_GRC |
- DMAE_CMD_C_DST_PCI | DMAE_CMD_C_ENABLE |
- DMAE_CMD_SRC_RESET | DMAE_CMD_DST_RESET |
+ dmae.opcode = (DMAE_CMD_SRC_PCI | DMAE_CMD_DST_GRC |
+ DMAE_CMD_C_DST_PCI | DMAE_CMD_C_ENABLE |
+ DMAE_CMD_SRC_RESET | DMAE_CMD_DST_RESET |
#ifdef __BIG_ENDIAN
- DMAE_CMD_ENDIANITY_B_DW_SWAP |
+ DMAE_CMD_ENDIANITY_B_DW_SWAP |
#else
- DMAE_CMD_ENDIANITY_DW_SWAP |
+ DMAE_CMD_ENDIANITY_DW_SWAP |
#endif
- (BP_PORT(bp) ? DMAE_CMD_PORT_1 : DMAE_CMD_PORT_0) |
- (BP_E1HVN(bp) << DMAE_CMD_E1HVN_SHIFT));
- dmae->src_addr_lo = U64_LO(dma_addr);
- dmae->src_addr_hi = U64_HI(dma_addr);
- dmae->dst_addr_lo = dst_addr >> 2;
- dmae->dst_addr_hi = 0;
- dmae->len = len32;
- dmae->comp_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_comp));
- dmae->comp_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_comp));
- dmae->comp_val = DMAE_COMP_VAL;
+ (BP_PORT(bp) ? DMAE_CMD_PORT_1 : DMAE_CMD_PORT_0) |
+ (BP_E1HVN(bp) << DMAE_CMD_E1HVN_SHIFT));
+ dmae.src_addr_lo = U64_LO(dma_addr);
+ dmae.src_addr_hi = U64_HI(dma_addr);
+ dmae.dst_addr_lo = dst_addr >> 2;
+ dmae.dst_addr_hi = 0;
+ dmae.len = len32;
+ dmae.comp_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_comp));
+ dmae.comp_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_comp));
+ dmae.comp_val = DMAE_COMP_VAL;
DP(BNX2X_MSG_OFF, "DMAE: opcode 0x%08x\n"
DP_LEVEL "src_addr [%x:%08x] len [%d *4] "
"dst_addr [%x:%08x (%08x)]\n"
DP_LEVEL "comp_addr [%x:%08x] comp_val 0x%08x\n",
- dmae->opcode, dmae->src_addr_hi, dmae->src_addr_lo,
- dmae->len, dmae->dst_addr_hi, dmae->dst_addr_lo, dst_addr,
- dmae->comp_addr_hi, dmae->comp_addr_lo, dmae->comp_val);
+ dmae.opcode, dmae.src_addr_hi, dmae.src_addr_lo,
+ dmae.len, dmae.dst_addr_hi, dmae.dst_addr_lo, dst_addr,
+ dmae.comp_addr_hi, dmae.comp_addr_lo, dmae.comp_val);
DP(BNX2X_MSG_OFF, "data [0x%08x 0x%08x 0x%08x 0x%08x]\n",
bp->slowpath->wb_data[0], bp->slowpath->wb_data[1],
bp->slowpath->wb_data[2], bp->slowpath->wb_data[3]);
+ mutex_lock(&bp->dmae_mutex);
+
*wb_comp = 0;
- bnx2x_post_dmae(bp, dmae, INIT_DMAE_C(bp));
+ bnx2x_post_dmae(bp, &dmae, INIT_DMAE_C(bp));
udelay(5);
@@ -276,7 +276,7 @@ void bnx2x_write_dmae(struct bnx2x *bp, dma_addr_t dma_addr, u32 dst_addr,
void bnx2x_read_dmae(struct bnx2x *bp, u32 src_addr, u32 len32)
{
- struct dmae_command *dmae = &bp->init_dmae;
+ struct dmae_command dmae;
u32 *wb_comp = bnx2x_sp(bp, wb_comp);
int cnt = 200;
@@ -291,41 +291,41 @@ void bnx2x_read_dmae(struct bnx2x *bp, u32 src_addr, u32 len32)
return;
}
- mutex_lock(&bp->dmae_mutex);
-
- memset(bnx2x_sp(bp, wb_data[0]), 0, sizeof(u32) * 4);
- memset(dmae, 0, sizeof(struct dmae_command));
+ memset(&dmae, 0, sizeof(struct dmae_command));
- dmae->opcode = (DMAE_CMD_SRC_GRC | DMAE_CMD_DST_PCI |
- DMAE_CMD_C_DST_PCI | DMAE_CMD_C_ENABLE |
- DMAE_CMD_SRC_RESET | DMAE_CMD_DST_RESET |
+ dmae.opcode = (DMAE_CMD_SRC_GRC | DMAE_CMD_DST_PCI |
+ DMAE_CMD_C_DST_PCI | DMAE_CMD_C_ENABLE |
+ DMAE_CMD_SRC_RESET | DMAE_CMD_DST_RESET |
#ifdef __BIG_ENDIAN
- DMAE_CMD_ENDIANITY_B_DW_SWAP |
+ DMAE_CMD_ENDIANITY_B_DW_SWAP |
#else
- DMAE_CMD_ENDIANITY_DW_SWAP |
+ DMAE_CMD_ENDIANITY_DW_SWAP |
#endif
- (BP_PORT(bp) ? DMAE_CMD_PORT_1 : DMAE_CMD_PORT_0) |
- (BP_E1HVN(bp) << DMAE_CMD_E1HVN_SHIFT));
- dmae->src_addr_lo = src_addr >> 2;
- dmae->src_addr_hi = 0;
- dmae->dst_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_data));
- dmae->dst_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_data));
- dmae->len = len32;
- dmae->comp_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_comp));
- dmae->comp_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_comp));
- dmae->comp_val = DMAE_COMP_VAL;
+ (BP_PORT(bp) ? DMAE_CMD_PORT_1 : DMAE_CMD_PORT_0) |
+ (BP_E1HVN(bp) << DMAE_CMD_E1HVN_SHIFT));
+ dmae.src_addr_lo = src_addr >> 2;
+ dmae.src_addr_hi = 0;
+ dmae.dst_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_data));
+ dmae.dst_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_data));
+ dmae.len = len32;
+ dmae.comp_addr_lo = U64_LO(bnx2x_sp_mapping(bp, wb_comp));
+ dmae.comp_addr_hi = U64_HI(bnx2x_sp_mapping(bp, wb_comp));
+ dmae.comp_val = DMAE_COMP_VAL;
DP(BNX2X_MSG_OFF, "DMAE: opcode 0x%08x\n"
DP_LEVEL "src_addr [%x:%08x] len [%d *4] "
"dst_addr [%x:%08x (%08x)]\n"
DP_LEVEL "comp_addr [%x:%08x] comp_val 0x%08x\n",
- dmae->opcode, dmae->src_addr_hi, dmae->src_addr_lo,
- dmae->len, dmae->dst_addr_hi, dmae->dst_addr_lo, src_addr,
- dmae->comp_addr_hi, dmae->comp_addr_lo, dmae->comp_val);
+ dmae.opcode, dmae.src_addr_hi, dmae.src_addr_lo,
+ dmae.len, dmae.dst_addr_hi, dmae.dst_addr_lo, src_addr,
+ dmae.comp_addr_hi, dmae.comp_addr_lo, dmae.comp_val);
+ mutex_lock(&bp->dmae_mutex);
+
+ memset(bnx2x_sp(bp, wb_data[0]), 0, sizeof(u32) * 4);
*wb_comp = 0;
- bnx2x_post_dmae(bp, dmae, INIT_DMAE_C(bp));
+ bnx2x_post_dmae(bp, &dmae, INIT_DMAE_C(bp));
udelay(5);
--
1.5.4.3
--
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