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igb trivial annotations

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Al Viro 2008-03-16 22:23:24 +00:00 committed by Jeff Garzik
parent 7deb07b1be
commit 6d8126f988
3 changed files with 72 additions and 69 deletions
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42
drivers/net/igb/e1000_82575.h
View File

@ -61,28 +61,28 @@
/* Receive Descriptor - Advanced */ /* Receive Descriptor - Advanced */
union e1000_adv_rx_desc { union e1000_adv_rx_desc {
struct { struct {
u64 pkt_addr; /* Packet buffer address */ __le64 pkt_addr; /* Packet buffer address */
u64 hdr_addr; /* Header buffer address */ __le64 hdr_addr; /* Header buffer address */
} read; } read;
struct { struct {
struct { struct {
struct { struct {
u16 pkt_info; /* RSS type, Packet type */ __le16 pkt_info; /* RSS type, Packet type */
u16 hdr_info; /* Split Header, __le16 hdr_info; /* Split Header,
* header buffer length */ * header buffer length */
} lo_dword; } lo_dword;
union { union {
u32 rss; /* RSS Hash */ __le32 rss; /* RSS Hash */
struct { struct {
u16 ip_id; /* IP id */ __le16 ip_id; /* IP id */
u16 csum; /* Packet Checksum */ __le16 csum; /* Packet Checksum */
} csum_ip; } csum_ip;
} hi_dword; } hi_dword;
} lower; } lower;
struct { struct {
u32 status_error; /* ext status/error */ __le32 status_error; /* ext status/error */
u16 length; /* Packet length */ __le16 length; /* Packet length */
u16 vlan; /* VLAN tag */ __le16 vlan; /* VLAN tag */
} upper; } upper;
} wb; /* writeback */ } wb; /* writeback */
}; };
@ -97,14 +97,14 @@ union e1000_adv_rx_desc {
/* Transmit Descriptor - Advanced */ /* Transmit Descriptor - Advanced */
union e1000_adv_tx_desc { union e1000_adv_tx_desc {
struct { struct {
u64 buffer_addr; /* Address of descriptor's data buf */ __le64 buffer_addr; /* Address of descriptor's data buf */
u32 cmd_type_len; __le32 cmd_type_len;
u32 olinfo_status; __le32 olinfo_status;
} read; } read;
struct { struct {
u64 rsvd; /* Reserved */ __le64 rsvd; /* Reserved */
u32 nxtseq_seed; __le32 nxtseq_seed;
u32 status; __le32 status;
} wb; } wb;
}; };
@ -119,10 +119,10 @@ union e1000_adv_tx_desc {
/* Context descriptors */ /* Context descriptors */
struct e1000_adv_tx_context_desc { struct e1000_adv_tx_context_desc {
u32 vlan_macip_lens; __le32 vlan_macip_lens;
u32 seqnum_seed; __le32 seqnum_seed;
u32 type_tucmd_mlhl; __le32 type_tucmd_mlhl;
u32 mss_l4len_idx; __le32 mss_l4len_idx;
}; };
#define E1000_ADVTXD_MACLEN_SHIFT 9 /* Adv ctxt desc mac len shift */ #define E1000_ADVTXD_MACLEN_SHIFT 9 /* Adv ctxt desc mac len shift */

82
drivers/net/igb/e1000_hw.h
View File

@ -143,35 +143,35 @@ enum e1000_fc_type {
/* Receive Descriptor */ /* Receive Descriptor */
struct e1000_rx_desc { struct e1000_rx_desc {
u64 buffer_addr; /* Address of the descriptor's data buffer */ __le64 buffer_addr; /* Address of the descriptor's data buffer */
u16 length; /* Length of data DMAed into data buffer */ __le16 length; /* Length of data DMAed into data buffer */
u16 csum; /* Packet checksum */ __le16 csum; /* Packet checksum */
u8 status; /* Descriptor status */ u8 status; /* Descriptor status */
u8 errors; /* Descriptor Errors */ u8 errors; /* Descriptor Errors */
u16 special; __le16 special;
}; };
/* Receive Descriptor - Extended */ /* Receive Descriptor - Extended */
union e1000_rx_desc_extended { union e1000_rx_desc_extended {
struct { struct {
u64 buffer_addr; __le64 buffer_addr;
u64 reserved; __le64 reserved;
} read; } read;
struct { struct {
struct { struct {
u32 mrq; /* Multiple Rx Queues */ __le32 mrq; /* Multiple Rx Queues */
union { union {
u32 rss; /* RSS Hash */ __le32 rss; /* RSS Hash */
struct { struct {
u16 ip_id; /* IP id */ __le16 ip_id; /* IP id */
u16 csum; /* Packet Checksum */ __le16 csum; /* Packet Checksum */
} csum_ip; } csum_ip;
} hi_dword; } hi_dword;
} lower; } lower;
struct { struct {
u32 status_error; /* ext status/error */ __le32 status_error; /* ext status/error */
u16 length; __le16 length;
u16 vlan; /* VLAN tag */ __le16 vlan; /* VLAN tag */
} upper; } upper;
} wb; /* writeback */ } wb; /* writeback */
}; };
@ -181,49 +181,49 @@ union e1000_rx_desc_extended {
union e1000_rx_desc_packet_split { union e1000_rx_desc_packet_split {
struct { struct {
/* one buffer for protocol header(s), three data buffers */ /* one buffer for protocol header(s), three data buffers */
u64 buffer_addr[MAX_PS_BUFFERS]; __le64 buffer_addr[MAX_PS_BUFFERS];
} read; } read;
struct { struct {
struct { struct {
u32 mrq; /* Multiple Rx Queues */ __le32 mrq; /* Multiple Rx Queues */
union { union {
u32 rss; /* RSS Hash */ __le32 rss; /* RSS Hash */
struct { struct {
u16 ip_id; /* IP id */ __le16 ip_id; /* IP id */
u16 csum; /* Packet Checksum */ __le16 csum; /* Packet Checksum */
} csum_ip; } csum_ip;
} hi_dword; } hi_dword;
} lower; } lower;
struct { struct {
u32 status_error; /* ext status/error */ __le32 status_error; /* ext status/error */
u16 length0; /* length of buffer 0 */ __le16 length0; /* length of buffer 0 */
u16 vlan; /* VLAN tag */ __le16 vlan; /* VLAN tag */
} middle; } middle;
struct { struct {
u16 header_status; __le16 header_status;
u16 length[3]; /* length of buffers 1-3 */ __le16 length[3]; /* length of buffers 1-3 */
} upper; } upper;
u64 reserved; __le64 reserved;
} wb; /* writeback */ } wb; /* writeback */
}; };
/* Transmit Descriptor */ /* Transmit Descriptor */
struct e1000_tx_desc { struct e1000_tx_desc {
u64 buffer_addr; /* Address of the descriptor's data buffer */ __le64 buffer_addr; /* Address of the descriptor's data buffer */
union { union {
u32 data; __le32 data;
struct { struct {
u16 length; /* Data buffer length */ __le16 length; /* Data buffer length */
u8 cso; /* Checksum offset */ u8 cso; /* Checksum offset */
u8 cmd; /* Descriptor control */ u8 cmd; /* Descriptor control */
} flags; } flags;
} lower; } lower;
union { union {
u32 data; __le32 data;
struct { struct {
u8 status; /* Descriptor status */ u8 status; /* Descriptor status */
u8 css; /* Checksum start */ u8 css; /* Checksum start */
u16 special; __le16 special;
} fields; } fields;
} upper; } upper;
}; };
@ -231,49 +231,49 @@ struct e1000_tx_desc {
/* Offload Context Descriptor */ /* Offload Context Descriptor */
struct e1000_context_desc { struct e1000_context_desc {
union { union {
u32 ip_config; __le32 ip_config;
struct { struct {
u8 ipcss; /* IP checksum start */ u8 ipcss; /* IP checksum start */
u8 ipcso; /* IP checksum offset */ u8 ipcso; /* IP checksum offset */
u16 ipcse; /* IP checksum end */ __le16 ipcse; /* IP checksum end */
} ip_fields; } ip_fields;
} lower_setup; } lower_setup;
union { union {
u32 tcp_config; __le32 tcp_config;
struct { struct {
u8 tucss; /* TCP checksum start */ u8 tucss; /* TCP checksum start */
u8 tucso; /* TCP checksum offset */ u8 tucso; /* TCP checksum offset */
u16 tucse; /* TCP checksum end */ __le16 tucse; /* TCP checksum end */
} tcp_fields; } tcp_fields;
} upper_setup; } upper_setup;
u32 cmd_and_length; __le32 cmd_and_length;
union { union {
u32 data; __le32 data;
struct { struct {
u8 status; /* Descriptor status */ u8 status; /* Descriptor status */
u8 hdr_len; /* Header length */ u8 hdr_len; /* Header length */
u16 mss; /* Maximum segment size */ __le16 mss; /* Maximum segment size */
} fields; } fields;
} tcp_seg_setup; } tcp_seg_setup;
}; };
/* Offload data descriptor */ /* Offload data descriptor */
struct e1000_data_desc { struct e1000_data_desc {
u64 buffer_addr; /* Address of the descriptor's buffer address */ __le64 buffer_addr; /* Address of the descriptor's buffer address */
union { union {
u32 data; __le32 data;
struct { struct {
u16 length; /* Data buffer length */ __le16 length; /* Data buffer length */
u8 typ_len_ext; u8 typ_len_ext;
u8 cmd; u8 cmd;
} flags; } flags;
} lower; } lower;
union { union {
u32 data; __le32 data;
struct { struct {
u8 status; /* Descriptor status */ u8 status; /* Descriptor status */
u8 popts; /* Packet Options */ u8 popts; /* Packet Options */
u16 special; __le16 special;
} fields; } fields;
} upper; } upper;
}; };

17
drivers/net/igb/igb_main.c
View File

@ -3254,6 +3254,13 @@ quit_polling:
return 1; return 1;
} }
static inline u32 get_head(struct igb_ring *tx_ring)
{
void *end = (struct e1000_tx_desc *)tx_ring->desc + tx_ring->count;
return le32_to_cpu(*(volatile __le32 *)end);
}
/** /**
* igb_clean_tx_irq - Reclaim resources after transmit completes * igb_clean_tx_irq - Reclaim resources after transmit completes
* @adapter: board private structure * @adapter: board private structure
@ -3275,9 +3282,7 @@ static bool igb_clean_tx_irq(struct igb_adapter *adapter,
unsigned int total_bytes = 0, total_packets = 0; unsigned int total_bytes = 0, total_packets = 0;
rmb(); rmb();
head = *(volatile u32 *)((struct e1000_tx_desc *)tx_ring->desc head = get_head(tx_ring);
+ tx_ring->count);
head = le32_to_cpu(head);
i = tx_ring->next_to_clean; i = tx_ring->next_to_clean;
while (1) { while (1) {
while (i != head) { while (i != head) {
@ -3312,9 +3317,7 @@ static bool igb_clean_tx_irq(struct igb_adapter *adapter,
} }
oldhead = head; oldhead = head;
rmb(); rmb();
head = *(volatile u32 *)((struct e1000_tx_desc *)tx_ring->desc head = get_head(tx_ring);
+ tx_ring->count);
head = le32_to_cpu(head);
if (head == oldhead) if (head == oldhead)
goto done_cleaning; goto done_cleaning;
} /* while (1) */ } /* while (1) */
@ -3388,7 +3391,7 @@ done_cleaning:
* @vlan: descriptor vlan field as written by hardware (no le/be conversion) * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
* @skb: pointer to sk_buff to be indicated to stack * @skb: pointer to sk_buff to be indicated to stack
**/ **/
static void igb_receive_skb(struct igb_adapter *adapter, u8 status, u16 vlan, static void igb_receive_skb(struct igb_adapter *adapter, u8 status, __le16 vlan,
struct sk_buff *skb) struct sk_buff *skb)
{ {
if (adapter->vlgrp && (status & E1000_RXD_STAT_VP)) if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))