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linux-sg2042
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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@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eilon Greenstein 2009-08-12 08:23:44 +00:00 committed by David S. Miller
parent 0d28e49a26
commit 5ff7b6d4c1
2 changed files with 47 additions and 48 deletions
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1
drivers/net/bnx2x.h
View File

@ -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;

70
drivers/net/bnx2x_main.c
View File

@ -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;
@ -216,11 +216,9 @@ 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.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
@ -230,29 +228,31 @@ void bnx2x_write_dmae(struct bnx2x *bp, dma_addr_t dma_addr, u32 dst_addr,
#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;
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;
@ -291,12 +291,9 @@ void bnx2x_read_dmae(struct bnx2x *bp, u32 src_addr, u32 len32)
return;
}
mutex_lock(&bp->dmae_mutex);
memset(&dmae, 0, sizeof(struct dmae_command));
memset(bnx2x_sp(bp, wb_data[0]), 0, sizeof(u32) * 4);
memset(dmae, 0, sizeof(struct dmae_command));
dmae->opcode = (DMAE_CMD_SRC_GRC | DMAE_CMD_DST_PCI |
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
@ -306,26 +303,29 @@ void bnx2x_read_dmae(struct bnx2x *bp, u32 src_addr, u32 len32)
#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;
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);