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Subject[PATCH 06/12] atl1c: split 2 32bit registers of TPD to 4 16bit registers
Date
TPD producer/consumer index is 16bit wide.
16bit read/write reduce the dependency of the 2 tpd rings (hi and lo)
rename reg(157C/1580) to keep name coninsistency.

Signed-off-by: xiong <xiong@qca.qualcomm.com>
Tested-by: Liu David <dwliu@qca.qualcomm.com>
---
drivers/net/ethernet/atheros/atl1c/atl1c.h | 10 +++++-
drivers/net/ethernet/atheros/atl1c/atl1c_hw.h | 17 ++++-------
drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 34 +++++-----------------
3 files changed, 22 insertions(+), 39 deletions(-)
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c.h b/drivers/net/ethernet/atheros/atl1c/atl1c.h
index f8628bc..16a5c7a 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c.h
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c.h
@@ -583,8 +583,14 @@ struct atl1c_adapter {
#define AT_WRITE_REGW(a, reg, value) (\
writew((value), ((a)->hw_addr + reg)))

-#define AT_READ_REGW(a, reg) (\
- readw((a)->hw_addr + reg))
+#define AT_READ_REGW(a, reg, pdata) do { \
+ if (unlikely((a)->hibernate)) { \
+ readw((a)->hw_addr + reg); \
+ *(u16 *)pdata = readw((a)->hw_addr + reg); \
+ } else { \
+ *(u16 *)pdata = readw((a)->hw_addr + reg); \
+ } \
+ } while (0)

#define AT_WRITE_REG_ARRAY(a, reg, offset, value) ( \
writel((value), (((a)->hw_addr + reg) + ((offset) << 2))))
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h b/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
index caff2ae..ca45fad 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_hw.h
@@ -455,8 +455,8 @@ int atl1c_phy_power_saving(struct atl1c_hw *hw);
#define REG_RRD0_HEAD_ADDR_LO 0x1568
#define REG_RRD_RING_SIZE 0x1578
#define RRD_RING_SIZE_MASK 0x0FFF
-#define REG_HTPD_HEAD_ADDR_LO 0x157C
-#define REG_NTPD_HEAD_ADDR_LO 0x1580
+#define REG_TPD_PRI1_ADDR_LO 0x157C
+#define REG_TPD_PRI0_ADDR_LO 0x1580
#define REG_TPD_RING_SIZE 0x1584
#define TPD_RING_SIZE_MASK 0xFFFF

@@ -562,15 +562,10 @@ int atl1c_phy_power_saving(struct atl1c_hw *hw);
#define MB_RFDX_PROD_IDX_MASK 0xFFFF
#define REG_MB_RFD0_PROD_IDX 0x15E0

-#define MB_PRIO_PROD_IDX_MASK 0xFFFF
-#define REG_MB_PRIO_PROD_IDX 0x15F0
-#define MB_HTPD_PROD_IDX_SHIFT 0
-#define MB_NTPD_PROD_IDX_SHIFT 16
-
-#define MB_PRIO_CONS_IDX_MASK 0xFFFF
-#define REG_MB_PRIO_CONS_IDX 0x15F4
-#define MB_HTPD_CONS_IDX_SHIFT 0
-#define MB_NTPD_CONS_IDX_SHIFT 16
+#define REG_TPD_PRI1_PIDX 0x15F0 /* 16bit,hi-tpd producer idx */
+#define REG_TPD_PRI0_PIDX 0x15F2 /* 16bit,lo-tpd producer idx */
+#define REG_TPD_PRI1_CIDX 0x15F4 /* 16bit,hi-tpd consumer idx */
+#define REG_TPD_PRI0_CIDX 0x15F6 /* 16bit,lo-tpd consumer idx */

#define REG_MB_RFD01_CONS_IDX 0x15F8
#define MB_RFD0_CONS_IDX_MASK 0x0000FFFF
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index ceb9df5..c7d7640 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -995,10 +995,10 @@ static void atl1c_configure_des_ring(struct atl1c_adapter *adapter)
(u32)((tpd_ring[atl1c_trans_normal].dma &
AT_DMA_HI_ADDR_MASK) >> 32));
/* just enable normal priority TX queue */
- AT_WRITE_REG(hw, REG_NTPD_HEAD_ADDR_LO,
+ AT_WRITE_REG(hw, REG_TPD_PRI0_ADDR_LO,
(u32)(tpd_ring[atl1c_trans_normal].dma &
AT_DMA_LO_ADDR_MASK));
- AT_WRITE_REG(hw, REG_HTPD_HEAD_ADDR_LO,
+ AT_WRITE_REG(hw, REG_TPD_PRI1_ADDR_LO,
(u32)(tpd_ring[atl1c_trans_high].dma &
AT_DMA_LO_ADDR_MASK));
AT_WRITE_REG(hw, REG_TPD_RING_SIZE,
@@ -1519,16 +1519,11 @@ static bool atl1c_clean_tx_irq(struct atl1c_adapter *adapter,
struct pci_dev *pdev = adapter->pdev;
u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
u16 hw_next_to_clean;
- u16 shift;
- u32 data;
+ u16 reg;

- if (type == atl1c_trans_high)
- shift = MB_HTPD_CONS_IDX_SHIFT;
- else
- shift = MB_NTPD_CONS_IDX_SHIFT;
+ reg = type == atl1c_trans_high ? REG_TPD_PRI1_CIDX : REG_TPD_PRI0_CIDX;

- AT_READ_REG(&adapter->hw, REG_MB_PRIO_CONS_IDX, &data);
- hw_next_to_clean = (data >> shift) & MB_PRIO_PROD_IDX_MASK;
+ AT_READ_REGW(&adapter->hw, reg, &hw_next_to_clean);

while (next_to_clean != hw_next_to_clean) {
buffer_info = &tpd_ring->buffer_info[next_to_clean];
@@ -2090,23 +2085,10 @@ static void atl1c_tx_queue(struct atl1c_adapter *adapter, struct sk_buff *skb,
struct atl1c_tpd_desc *tpd, enum atl1c_trans_queue type)
{
struct atl1c_tpd_ring *tpd_ring = &adapter->tpd_ring[type];
- u32 prod_data;
+ u16 reg;

- AT_READ_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, &prod_data);
- switch (type) {
- case atl1c_trans_high:
- prod_data &= 0xFFFF0000;
- prod_data |= tpd_ring->next_to_use & 0xFFFF;
- break;
- case atl1c_trans_normal:
- prod_data &= 0x0000FFFF;
- prod_data |= (tpd_ring->next_to_use & 0xFFFF) << 16;
- break;
- default:
- break;
- }
- wmb();
- AT_WRITE_REG(&adapter->hw, REG_MB_PRIO_PROD_IDX, prod_data);
+ reg = type == atl1c_trans_high ? REG_TPD_PRI1_PIDX : REG_TPD_PRI0_PIDX;
+ AT_WRITE_REGW(&adapter->hw, reg, tpd_ring->next_to_use);
}

static netdev_tx_t atl1c_xmit_frame(struct sk_buff *skb,
--
1.7.7


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