[PATCH v5 1/7] staging: et131x: make some tweaks to reduce split lines
ZHAO Gang
gamerh2o at gmail.com
Fri Nov 22 16:21:29 UTC 2013
1. As TODO list suggested, do this sort of things to reduce split lines:
struct fbr_lookup *fbr;
fbr = rx_local->fbr[id];
Then replace all the instances of "rx_local->fbr[id]" with fbr.
2. Some code style changes
Signed-off-by: ZHAO Gang <gamerh2o at gmail.com>
---
v4 -> v5: split "[PATCH v4 1/5] staging: et131x: clean up code" into 3 parts
Dan, I split [PATCH v4 1/5] into 3 parts instead of 4. My argument is
that code style changes in this patch are straight and not too
many. It maybe not worth the work to let code style changes be a stand
alone patch.
drivers/staging/et131x/et131x.c | 202 ++++++++++++++++++++--------------------
1 file changed, 103 insertions(+), 99 deletions(-)
diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index d9446c4..aeb24ee 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -1821,6 +1821,9 @@ static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
u32 __iomem *min_des;
u32 __iomem *base_hi;
u32 __iomem *base_lo;
+ struct fbr_lookup *fbr;
+
+ fbr = rx_local->fbr[id];
if (id == 0) {
num_des = &rx_dma->fbr0_num_des;
@@ -1837,12 +1840,10 @@ static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
}
/* Now's the best time to initialize FBR contents */
- fbr_entry =
- (struct fbr_desc *) rx_local->fbr[id]->ring_virtaddr;
- for (entry = 0;
- entry < rx_local->fbr[id]->num_entries; entry++) {
- fbr_entry->addr_hi = rx_local->fbr[id]->bus_high[entry];
- fbr_entry->addr_lo = rx_local->fbr[id]->bus_low[entry];
+ fbr_entry = (struct fbr_desc *)fbr->ring_virtaddr;
+ for (entry = 0; entry < fbr->num_entries; entry++) {
+ fbr_entry->addr_hi = fbr->bus_high[entry];
+ fbr_entry->addr_lo = fbr->bus_low[entry];
fbr_entry->word2 = entry;
fbr_entry++;
}
@@ -1850,19 +1851,16 @@ static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
/* Set the address and parameters of Free buffer ring 1 and 0
* into the 1310's registers
*/
- writel(upper_32_bits(rx_local->fbr[id]->ring_physaddr),
- base_hi);
- writel(lower_32_bits(rx_local->fbr[id]->ring_physaddr),
- base_lo);
- writel(rx_local->fbr[id]->num_entries - 1, num_des);
+ writel(upper_32_bits(fbr->ring_physaddr), base_hi);
+ writel(lower_32_bits(fbr->ring_physaddr), base_lo);
+ writel(fbr->num_entries - 1, num_des);
writel(ET_DMA10_WRAP, full_offset);
/* This variable tracks the free buffer ring 1 full position,
* so it has to match the above.
*/
- rx_local->fbr[id]->local_full = ET_DMA10_WRAP;
- writel(((rx_local->fbr[id]->num_entries *
- LO_MARK_PERCENT_FOR_RX) / 100) - 1,
+ fbr->local_full = ET_DMA10_WRAP;
+ writel((fbr->num_entries * LO_MARK_PERCENT_FOR_RX / 100) - 1,
min_des);
}
@@ -2204,6 +2202,7 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
u32 pktstat_ringsize;
u32 fbr_chunksize;
struct rx_ring *rx_ring;
+ struct fbr_lookup *fbr;
/* Setup some convenience pointers */
rx_ring = &adapter->rx_ring;
@@ -2252,15 +2251,16 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
adapter->rx_ring.fbr[1]->num_entries;
for (id = 0; id < NUM_FBRS; id++) {
+ fbr = rx_ring->fbr[id];
+
/* Allocate an area of memory for Free Buffer Ring */
- bufsize =
- (sizeof(struct fbr_desc) * rx_ring->fbr[id]->num_entries);
- rx_ring->fbr[id]->ring_virtaddr =
- dma_alloc_coherent(&adapter->pdev->dev,
- bufsize,
- &rx_ring->fbr[id]->ring_physaddr,
- GFP_KERNEL);
- if (!rx_ring->fbr[id]->ring_virtaddr) {
+ bufsize = sizeof(struct fbr_desc) * fbr->num_entries;
+ fbr->ring_virtaddr = dma_alloc_coherent(&adapter->pdev->dev,
+ bufsize,
+ &fbr->ring_physaddr,
+ GFP_KERNEL);
+
+ if (!fbr->ring_virtaddr) {
dev_err(&adapter->pdev->dev,
"Cannot alloc memory for Free Buffer Ring %d\n", id);
return -ENOMEM;
@@ -2268,25 +2268,26 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
}
for (id = 0; id < NUM_FBRS; id++) {
- fbr_chunksize = (FBR_CHUNKS * rx_ring->fbr[id]->buffsize);
+ fbr = rx_ring->fbr[id];
+ fbr_chunksize = (FBR_CHUNKS * fbr->buffsize);
- for (i = 0;
- i < (rx_ring->fbr[id]->num_entries / FBR_CHUNKS); i++) {
+ for (i = 0; i < (fbr->num_entries / FBR_CHUNKS); i++) {
dma_addr_t fbr_tmp_physaddr;
- rx_ring->fbr[id]->mem_virtaddrs[i] = dma_alloc_coherent(
- &adapter->pdev->dev, fbr_chunksize,
- &rx_ring->fbr[id]->mem_physaddrs[i],
- GFP_KERNEL);
+ fbr->mem_virtaddrs[i] =
+ dma_alloc_coherent(&adapter->pdev->dev,
+ fbr_chunksize,
+ &fbr->mem_physaddrs[i],
+ GFP_KERNEL);
- if (!rx_ring->fbr[id]->mem_virtaddrs[i]) {
+ if (!fbr->mem_virtaddrs[i]) {
dev_err(&adapter->pdev->dev,
"Could not alloc memory\n");
return -ENOMEM;
}
/* See NOTE in "Save Physical Address" comment above */
- fbr_tmp_physaddr = rx_ring->fbr[id]->mem_physaddrs[i];
+ fbr_tmp_physaddr = fbr->mem_physaddrs[i];
for (j = 0; j < FBR_CHUNKS; j++) {
u32 index = (i * FBR_CHUNKS) + j;
@@ -2294,19 +2295,18 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
/* Save the Virtual address of this index for
* quick access later
*/
- rx_ring->fbr[id]->virt[index] =
- (u8 *) rx_ring->fbr[id]->mem_virtaddrs[i] +
- (j * rx_ring->fbr[id]->buffsize);
+ fbr->virt[index] = (u8 *)fbr->mem_virtaddrs[i] +
+ (j * fbr->buffsize);
/* now store the physical address in the
* descriptor so the device can access it
*/
- rx_ring->fbr[id]->bus_high[index] =
+ fbr->bus_high[index] =
upper_32_bits(fbr_tmp_physaddr);
- rx_ring->fbr[id]->bus_low[index] =
+ fbr->bus_low[index] =
lower_32_bits(fbr_tmp_physaddr);
- fbr_tmp_physaddr += rx_ring->fbr[id]->buffsize;
+ fbr_tmp_physaddr += fbr->buffsize;
}
}
}
@@ -2322,7 +2322,7 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
if (!rx_ring->ps_ring_virtaddr) {
dev_err(&adapter->pdev->dev,
- "Cannot alloc memory for Packet Status Ring\n");
+ "Cannot alloc memory for Packet Status Ring\n");
return -ENOMEM;
}
pr_info("Packet Status Ring %llx\n",
@@ -2341,7 +2341,7 @@ static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
GFP_KERNEL);
if (!rx_ring->rx_status_block) {
dev_err(&adapter->pdev->dev,
- "Cannot alloc memory for Status Block\n");
+ "Cannot alloc memory for Status Block\n");
return -ENOMEM;
}
rx_ring->num_rfd = NIC_DEFAULT_NUM_RFD;
@@ -2365,6 +2365,7 @@ static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
u32 pktstat_ringsize;
struct rfd *rfd;
struct rx_ring *rx_ring;
+ struct fbr_lookup *fbr;
/* Setup some convenience pointers */
rx_ring = &adapter->rx_ring;
@@ -2383,34 +2384,34 @@ static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
/* Free Free Buffer Rings */
for (id = 0; id < NUM_FBRS; id++) {
- if (!rx_ring->fbr[id]->ring_virtaddr)
+ fbr = rx_ring->fbr[id];
+
+ if (!fbr->ring_virtaddr)
continue;
/* First the packet memory */
- for (index = 0;
- index < (rx_ring->fbr[id]->num_entries / FBR_CHUNKS);
+ for (index = 0; index < (fbr->num_entries / FBR_CHUNKS);
index++) {
- if (rx_ring->fbr[id]->mem_virtaddrs[index]) {
- bufsize =
- rx_ring->fbr[id]->buffsize * FBR_CHUNKS;
+ if (fbr->mem_virtaddrs[index]) {
+ bufsize = fbr->buffsize * FBR_CHUNKS;
dma_free_coherent(&adapter->pdev->dev,
- bufsize,
- rx_ring->fbr[id]->mem_virtaddrs[index],
- rx_ring->fbr[id]->mem_physaddrs[index]);
+ bufsize,
+ fbr->mem_virtaddrs[index],
+ fbr->mem_physaddrs[index]);
- rx_ring->fbr[id]->mem_virtaddrs[index] = NULL;
+ fbr->mem_virtaddrs[index] = NULL;
}
}
- bufsize =
- sizeof(struct fbr_desc) * rx_ring->fbr[id]->num_entries;
+ bufsize = sizeof(struct fbr_desc) * fbr->num_entries;
- dma_free_coherent(&adapter->pdev->dev, bufsize,
- rx_ring->fbr[id]->ring_virtaddr,
- rx_ring->fbr[id]->ring_physaddr);
+ dma_free_coherent(&adapter->pdev->dev,
+ bufsize,
+ fbr->ring_virtaddr,
+ fbr->ring_physaddr);
- rx_ring->fbr[id]->ring_virtaddr = NULL;
+ fbr->ring_virtaddr = NULL;
}
/* Free Packet Status Ring */
@@ -2418,9 +2419,10 @@ static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
pktstat_ringsize = sizeof(struct pkt_stat_desc) *
adapter->rx_ring.psr_num_entries;
- dma_free_coherent(&adapter->pdev->dev, pktstat_ringsize,
- rx_ring->ps_ring_virtaddr,
- rx_ring->ps_ring_physaddr);
+ dma_free_coherent(&adapter->pdev->dev,
+ pktstat_ringsize,
+ rx_ring->ps_ring_virtaddr,
+ rx_ring->ps_ring_physaddr);
rx_ring->ps_ring_virtaddr = NULL;
}
@@ -2428,8 +2430,10 @@ static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
/* Free area of memory for the writeback of status information */
if (rx_ring->rx_status_block) {
dma_free_coherent(&adapter->pdev->dev,
- sizeof(struct rx_status_block),
- rx_ring->rx_status_block, rx_ring->rx_status_bus);
+ sizeof(struct rx_status_block),
+ rx_ring->rx_status_block,
+ rx_ring->rx_status_bus);
+
rx_ring->rx_status_block = NULL;
}
@@ -2510,8 +2514,12 @@ static void nic_return_rfd(struct et131x_adapter *adapter, struct rfd *rfd)
* need to clean up OOB data
*/
if (buff_index < rx_local->fbr[ring_index]->num_entries) {
+ u32 free_buff_ring;
u32 __iomem *offset;
struct fbr_desc *next;
+ struct fbr_lookup *fbr;
+
+ fbr = rx_local->fbr[ring_index];
spin_lock_irqsave(&adapter->fbr_lock, flags);
@@ -2520,27 +2528,25 @@ static void nic_return_rfd(struct et131x_adapter *adapter, struct rfd *rfd)
else
offset = &rx_dma->fbr1_full_offset;
- next = (struct fbr_desc *)
- (rx_local->fbr[ring_index]->ring_virtaddr) +
- INDEX10(rx_local->fbr[ring_index]->local_full);
+ next = (struct fbr_desc *)(fbr->ring_virtaddr) +
+ INDEX10(fbr->local_full);
/* Handle the Free Buffer Ring advancement here. Write
* the PA / Buffer Index for the returned buffer into
* the oldest (next to be freed)FBR entry
*/
- next->addr_hi = rx_local->fbr[ring_index]->bus_high[buff_index];
- next->addr_lo = rx_local->fbr[ring_index]->bus_low[buff_index];
+ next->addr_hi = fbr->bus_high[buff_index];
+ next->addr_lo = fbr->bus_low[buff_index];
next->word2 = buff_index;
- writel(bump_free_buff_ring(
- &rx_local->fbr[ring_index]->local_full,
- rx_local->fbr[ring_index]->num_entries - 1),
- offset);
+ free_buff_ring = bump_free_buff_ring(&fbr->local_full,
+ fbr->num_entries - 1);
+ writel(free_buff_ring, offset);
spin_unlock_irqrestore(&adapter->fbr_lock, flags);
} else {
dev_err(&adapter->pdev->dev,
- "%s illegal Buffer Index returned\n", __func__);
+ "%s illegal Buffer Index returned\n", __func__);
}
/* The processing on this RFD is done, so put it back on the tail of
@@ -2569,17 +2575,18 @@ static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
struct rx_ring *rx_local = &adapter->rx_ring;
struct rx_status_block *status;
struct pkt_stat_desc *psr;
+ struct list_head *element;
+ struct fbr_lookup *fbr;
+ struct sk_buff *skb;
struct rfd *rfd;
- u32 i;
- u8 *buf;
unsigned long flags;
- struct list_head *element;
- u8 ring_index;
- u16 buff_index;
u32 len;
u32 word0;
u32 word1;
- struct sk_buff *skb;
+ u32 i;
+ u16 buff_index;
+ u8 ring_index;
+ u8 *buf;
/* RX Status block is written by the DMA engine prior to every
* interrupt. It contains the next to be used entry in the Packet
@@ -2601,6 +2608,7 @@ static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
*/
len = psr->word1 & 0xFFFF;
ring_index = (psr->word1 >> 26) & 0x03;
+ fbr = rx_local->fbr[ring_index];
buff_index = (psr->word1 >> 16) & 0x3FF;
word0 = psr->word0;
@@ -2616,8 +2624,7 @@ static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
writel(rx_local->local_psr_full, &adapter->regs->rxdma.psr_full_offset);
- if (ring_index > 1 ||
- buff_index > rx_local->fbr[ring_index]->num_entries - 1) {
+ if (ring_index > 1 || buff_index > fbr->num_entries - 1) {
/* Illegal buffer or ring index cannot be used by S/W*/
dev_err(&adapter->pdev->dev,
"NICRxPkts PSR Entry %d indicates length of %d and/or bad bi(%d)\n",
@@ -2670,7 +2677,7 @@ static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
&& !(adapter->packet_filter & ET131X_PACKET_TYPE_PROMISCUOUS)
&& !(adapter->packet_filter &
ET131X_PACKET_TYPE_ALL_MULTICAST)) {
- buf = rx_local->fbr[ring_index]->virt[buff_index];
+ buf = fbr->virt[buff_index];
/* Loop through our list to see if the destination
* address of this packet matches one in our list.
@@ -2723,9 +2730,7 @@ static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
adapter->net_stats.rx_bytes += rfd->len;
- memcpy(skb_put(skb, rfd->len),
- rx_local->fbr[ring_index]->virt[buff_index],
- rfd->len);
+ memcpy(skb_put(skb, rfd->len), fbr->virt[buff_index], rfd->len);
skb->protocol = eth_type_trans(skb, adapter->netdev);
skb->ip_summed = CHECKSUM_NONE;
@@ -2813,10 +2818,10 @@ static int et131x_tx_dma_memory_alloc(struct et131x_adapter *adapter)
desc_size = (sizeof(struct tx_desc) * NUM_DESC_PER_RING_TX);
tx_ring->tx_desc_ring =
- (struct tx_desc *) dma_alloc_coherent(&adapter->pdev->dev,
- desc_size,
- &tx_ring->tx_desc_ring_pa,
- GFP_KERNEL);
+ (struct tx_desc *)dma_alloc_coherent(&adapter->pdev->dev,
+ desc_size,
+ &tx_ring->tx_desc_ring_pa,
+ GFP_KERNEL);
if (!adapter->tx_ring.tx_desc_ring) {
dev_err(&adapter->pdev->dev,
"Cannot alloc memory for Tx Ring\n");
@@ -2832,9 +2837,9 @@ static int et131x_tx_dma_memory_alloc(struct et131x_adapter *adapter)
*/
/* Allocate memory for the Tx status block */
tx_ring->tx_status = dma_alloc_coherent(&adapter->pdev->dev,
- sizeof(u32),
- &tx_ring->tx_status_pa,
- GFP_KERNEL);
+ sizeof(u32),
+ &tx_ring->tx_status_pa,
+ GFP_KERNEL);
if (!adapter->tx_ring.tx_status_pa) {
dev_err(&adapter->pdev->dev,
"Cannot alloc memory for Tx status block\n");
@@ -2856,18 +2861,18 @@ static void et131x_tx_dma_memory_free(struct et131x_adapter *adapter)
/* Free memory relating to Tx rings here */
desc_size = (sizeof(struct tx_desc) * NUM_DESC_PER_RING_TX);
dma_free_coherent(&adapter->pdev->dev,
- desc_size,
- adapter->tx_ring.tx_desc_ring,
- adapter->tx_ring.tx_desc_ring_pa);
+ desc_size,
+ adapter->tx_ring.tx_desc_ring,
+ adapter->tx_ring.tx_desc_ring_pa);
adapter->tx_ring.tx_desc_ring = NULL;
}
/* Free memory for the Tx status block */
if (adapter->tx_ring.tx_status) {
dma_free_coherent(&adapter->pdev->dev,
- sizeof(u32),
- adapter->tx_ring.tx_status,
- adapter->tx_ring.tx_status_pa);
+ sizeof(u32),
+ adapter->tx_ring.tx_status,
+ adapter->tx_ring.tx_status_pa);
adapter->tx_ring.tx_status = NULL;
}
@@ -3204,9 +3209,8 @@ static inline void free_send_packet(struct et131x_adapter *adapter,
* they point to
*/
do {
- desc = (struct tx_desc *)
- (adapter->tx_ring.tx_desc_ring +
- INDEX10(tcb->index_start));
+ desc = (adapter->tx_ring.tx_desc_ring +
+ INDEX10(tcb->index_start));
dma_addr = desc->addr_lo;
dma_addr |= (u64)desc->addr_hi << 32;
@@ -3222,7 +3226,7 @@ static inline void free_send_packet(struct et131x_adapter *adapter,
tcb->index_start ^= ET_DMA10_WRAP;
}
} while (desc != (adapter->tx_ring.tx_desc_ring +
- INDEX10(tcb->index)));
+ INDEX10(tcb->index)));
dev_kfree_skb_any(tcb->skb);
}
--
1.8.3.1
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