[PATCH 6/6] ibmveth: Remove use of bitfields
Brian King
brking at linux.vnet.ibm.com
Sat Aug 11 05:29:26 EST 2007
Removes the use of bitfields from the ibmveth driver. This results
in slightly smaller object code.
Signed-off-by: Brian King <brking at linux.vnet.ibm.com>
---
linux-2.6-bjking1/drivers/net/ibmveth.c | 90 ++++++++++++++++----------------
linux-2.6-bjking1/drivers/net/ibmveth.h | 56 ++++++++-----------
2 files changed, 68 insertions(+), 78 deletions(-)
diff -puN drivers/net/ibmveth.h~ibmveth_nobitfields drivers/net/ibmveth.h
--- linux-2.6/drivers/net/ibmveth.h~ibmveth_nobitfields 2007-08-09 15:15:27.000000000 -0500
+++ linux-2.6-bjking1/drivers/net/ibmveth.h 2007-08-09 15:15:27.000000000 -0500
@@ -39,6 +39,12 @@
#define IbmVethMcastRemoveFilter 0x2UL
#define IbmVethMcastClearFilterTable 0x3UL
+#define IBMVETH_ILLAN_PADDED_PKT_CSUM 0x0000000000002000ULL
+#define IBMVETH_ILLAN_TRUNK_PRI_MASK 0x0000000000000F00ULL
+#define IBMVETH_ILLAN_IPV6_TCP_CSUM 0x0000000000000004ULL
+#define IBMVETH_ILLAN_IPV4_TCP_CSUM 0x0000000000000002ULL
+#define IBMVETH_ILLAN_ACTIVE_TRUNK 0x0000000000000001ULL
+
/* hcall macros */
#define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \
plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac)
@@ -150,13 +156,13 @@ struct ibmveth_adapter {
};
struct ibmveth_buf_desc_fields {
- u32 valid : 1;
- u32 toggle : 1;
- u32 reserved : 4;
- u32 no_csum : 1;
- u32 csum_good : 1;
- u32 length : 24;
- u32 address;
+ u32 flags_len;
+#define IBMVETH_BUF_VALID 0x80000000
+#define IBMVETH_BUF_TOGGLE 0x40000000
+#define IBMVETH_BUF_NO_CSUM 0x02000000
+#define IBMVETH_BUF_CSUM_GOOD 0x01000000
+#define IBMVETH_BUF_LEN_MASK 0x00FFFFFF
+ u32 address;
};
union ibmveth_buf_desc {
@@ -164,33 +170,17 @@ union ibmveth_buf_desc {
struct ibmveth_buf_desc_fields fields;
};
-struct ibmveth_illan_attributes_fields {
- u32 reserved;
- u32 reserved2 : 18;
- u32 csum_offload_padded_pkt_support : 1;
- u32 reserved3 : 1;
- u32 trunk_priority : 4;
- u32 reserved4 : 5;
- u32 tcp_csum_offload_ipv6 : 1;
- u32 tcp_csum_offload_ipv4 : 1;
- u32 active_trunk : 1;
-};
-
-union ibmveth_illan_attributes {
- u64 desc;
- struct ibmveth_illan_attributes_fields fields;
-};
-
struct ibmveth_rx_q_entry {
- u16 toggle : 1;
- u16 valid : 1;
- u16 reserved : 4;
- u16 no_csum : 1;
- u16 csum_good : 1;
- u16 reserved2 : 8;
- u16 offset;
- u32 length;
- u64 correlator;
+ u32 flags_off;
+#define IBMVETH_RXQ_TOGGLE 0x80000000
+#define IBMVETH_RXQ_TOGGLE_SHIFT 31
+#define IBMVETH_RXQ_VALID 0x40000000
+#define IBMVETH_RXQ_NO_CSUM 0x02000000
+#define IBMVETH_RXQ_CSUM_GOOD 0x01000000
+#define IBMVETH_RXQ_OFF_MASK 0x0000FFFF
+
+ u32 length;
+ u64 correlator;
};
#endif /* _IBMVETH_H */
diff -puN drivers/net/ibmveth.c~ibmveth_nobitfields drivers/net/ibmveth.c
--- linux-2.6/drivers/net/ibmveth.c~ibmveth_nobitfields 2007-08-09 15:15:27.000000000 -0500
+++ linux-2.6-bjking1/drivers/net/ibmveth.c 2007-08-09 15:15:27.000000000 -0500
@@ -131,19 +131,29 @@ struct ibmveth_stat ibmveth_stats[] = {
};
/* simple methods of getting data from the current rxq entry */
+static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
+{
+ return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
+}
+
+static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
+{
+ return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
+}
+
static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
{
- return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].toggle == adapter->rx_queue.toggle);
+ return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
}
static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
{
- return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].valid);
+ return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
}
static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
{
- return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].offset);
+ return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
}
static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
@@ -153,7 +163,7 @@ static inline int ibmveth_rxq_frame_leng
static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
{
- return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].csum_good);
+ return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
}
/* setup the initial settings for a buffer pool */
@@ -253,9 +263,7 @@ static void ibmveth_replenish_buffer_poo
correlator = ((u64)pool->index << 32) | index;
*(u64*)skb->data = correlator;
- desc.desc = 0;
- desc.fields.valid = 1;
- desc.fields.length = pool->buff_size;
+ desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
desc.fields.address = dma_addr;
lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
@@ -396,9 +404,8 @@ static void ibmveth_rxq_recycle_buffer(s
return;
}
- desc.desc = 0;
- desc.fields.valid = 1;
- desc.fields.length = adapter->rx_buff_pool[pool].buff_size;
+ desc.fields.flags_len = IBMVETH_BUF_VALID |
+ adapter->rx_buff_pool[pool].buff_size;
desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
@@ -549,9 +556,7 @@ static int ibmveth_open(struct net_devic
memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
mac_address = mac_address >> 16;
- rxq_desc.desc = 0;
- rxq_desc.fields.valid = 1;
- rxq_desc.fields.length = adapter->rx_queue.queue_len;
+ rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
rxq_desc.fields.address = adapter->rx_queue.queue_dma;
ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
@@ -693,7 +698,7 @@ static int ibmveth_set_csum_offload(stru
void (*done) (struct net_device *, u32))
{
struct ibmveth_adapter *adapter = dev->priv;
- union ibmveth_illan_attributes set_attr, clr_attr, ret_attr;
+ u64 set_attr, clr_attr, ret_attr;
long ret;
int rc1 = 0, rc2 = 0;
int restart = 0;
@@ -705,21 +710,21 @@ static int ibmveth_set_csum_offload(stru
adapter->pool_config = 0;
}
- set_attr.desc = 0;
- clr_attr.desc = 0;
+ set_attr = 0;
+ clr_attr = 0;
if (data)
- set_attr.fields.tcp_csum_offload_ipv4 = 1;
+ set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
else
- clr_attr.fields.tcp_csum_offload_ipv4 = 1;
+ clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
- ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr.desc);
+ ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
- if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
- !ret_attr.fields.trunk_priority &&
- ret_attr.fields.csum_offload_padded_pkt_support) {
- ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr.desc,
- set_attr.desc, &ret_attr.desc);
+ if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
+ !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
+ (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
+ ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
+ set_attr, &ret_attr);
if (ret != H_SUCCESS) {
rc1 = -EIO;
@@ -727,13 +732,13 @@ static int ibmveth_set_csum_offload(stru
" %d rc=%ld\n", data, ret);
ret = h_illan_attributes(adapter->vdev->unit_address,
- set_attr.desc, clr_attr.desc, &ret_attr.desc);
+ set_attr, clr_attr, &ret_attr);
} else
done(dev, data);
} else {
rc1 = -EIO;
ibmveth_error_printk("unable to change checksum offload settings."
- " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr.desc);
+ " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
}
if (restart)
@@ -839,11 +844,9 @@ static int ibmveth_start_xmit(struct sk_
unsigned int tx_send_failed = 0;
unsigned int tx_map_failed = 0;
- desc.desc = 0;
- desc.fields.length = skb->len;
+ desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
desc.fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
- desc.fields.length, DMA_TO_DEVICE);
- desc.fields.valid = 1;
+ skb->len, DMA_TO_DEVICE);
if (skb->ip_summed == CHECKSUM_PARTIAL &&
ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
@@ -855,8 +858,7 @@ static int ibmveth_start_xmit(struct sk_
if (skb->ip_summed == CHECKSUM_PARTIAL) {
unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
- desc.fields.no_csum = 1;
- desc.fields.csum_good = 1;
+ desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
/* Need to zero out the checksum */
buf[0] = 0;
@@ -882,7 +884,8 @@ static int ibmveth_start_xmit(struct sk_
if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
- desc.fields.valid, desc.fields.length, desc.fields.address);
+ (desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
+ skb->len, desc.fields.address);
tx_send_failed++;
tx_dropped++;
} else {
@@ -892,7 +895,7 @@ static int ibmveth_start_xmit(struct sk_
}
dma_unmap_single(&adapter->vdev->dev, desc.fields.address,
- desc.fields.length, DMA_TO_DEVICE);
+ skb->len, DMA_TO_DEVICE);
out: spin_lock_irqsave(&adapter->stats_lock, flags);
adapter->stats.tx_dropped += tx_dropped;
@@ -1108,7 +1111,7 @@ static int __devinit ibmveth_probe(struc
long ret;
struct net_device *netdev;
struct ibmveth_adapter *adapter;
- union ibmveth_illan_attributes set_attr, ret_attr;
+ u64 set_attr, ret_attr;
unsigned char *mac_addr_p;
unsigned int *mcastFilterSize_p;
@@ -1202,23 +1205,20 @@ static int __devinit ibmveth_probe(struc
ibmveth_debug_printk("registering netdev...\n");
- ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr.desc);
+ ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
- if (ret == H_SUCCESS && !ret_attr.fields.active_trunk &&
- !ret_attr.fields.trunk_priority &&
- ret_attr.fields.csum_offload_padded_pkt_support) {
- set_attr.desc = 0;
- set_attr.fields.tcp_csum_offload_ipv4 = 1;
+ if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
+ !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
+ (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
+ set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
- ret = h_illan_attributes(dev->unit_address, 0, set_attr.desc,
- &ret_attr.desc);
+ ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
if (ret == H_SUCCESS) {
adapter->rx_csum = 1;
netdev->features |= NETIF_F_IP_CSUM;
} else
- ret = h_illan_attributes(dev->unit_address, set_attr.desc,
- 0, &ret_attr.desc);
+ ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
}
rc = register_netdev(netdev);
_
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