mirror of https://gitee.com/openkylin/linux.git
231 lines
7.2 KiB
C
231 lines
7.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (c) 2018, Intel Corporation. */
|
|
|
|
#ifndef _ICE_TXRX_H_
|
|
#define _ICE_TXRX_H_
|
|
|
|
#define ICE_DFLT_IRQ_WORK 256
|
|
#define ICE_RXBUF_2048 2048
|
|
#define ICE_MAX_CHAINED_RX_BUFS 5
|
|
#define ICE_MAX_BUF_TXD 8
|
|
#define ICE_MIN_TX_LEN 17
|
|
|
|
/* The size limit for a transmit buffer in a descriptor is (16K - 1).
|
|
* In order to align with the read requests we will align the value to
|
|
* the nearest 4K which represents our maximum read request size.
|
|
*/
|
|
#define ICE_MAX_READ_REQ_SIZE 4096
|
|
#define ICE_MAX_DATA_PER_TXD (16 * 1024 - 1)
|
|
#define ICE_MAX_DATA_PER_TXD_ALIGNED \
|
|
(~(ICE_MAX_READ_REQ_SIZE - 1) & ICE_MAX_DATA_PER_TXD)
|
|
|
|
#define ICE_RX_BUF_WRITE 16 /* Must be power of 2 */
|
|
#define ICE_MAX_TXQ_PER_TXQG 128
|
|
|
|
/* We are assuming that the cache line is always 64 Bytes here for ice.
|
|
* In order to make sure that is a correct assumption there is a check in probe
|
|
* to print a warning if the read from GLPCI_CNF2 tells us that the cache line
|
|
* size is 128 bytes. We do it this way because we do not want to read the
|
|
* GLPCI_CNF2 register or a variable containing the value on every pass through
|
|
* the Tx path.
|
|
*/
|
|
#define ICE_CACHE_LINE_BYTES 64
|
|
#define ICE_DESCS_PER_CACHE_LINE (ICE_CACHE_LINE_BYTES / \
|
|
sizeof(struct ice_tx_desc))
|
|
#define ICE_DESCS_FOR_CTX_DESC 1
|
|
#define ICE_DESCS_FOR_SKB_DATA_PTR 1
|
|
/* Tx descriptors needed, worst case */
|
|
#define DESC_NEEDED (MAX_SKB_FRAGS + ICE_DESCS_FOR_CTX_DESC + \
|
|
ICE_DESCS_PER_CACHE_LINE + ICE_DESCS_FOR_SKB_DATA_PTR)
|
|
#define ICE_DESC_UNUSED(R) \
|
|
((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
|
|
(R)->next_to_clean - (R)->next_to_use - 1)
|
|
|
|
#define ICE_TX_FLAGS_TSO BIT(0)
|
|
#define ICE_TX_FLAGS_HW_VLAN BIT(1)
|
|
#define ICE_TX_FLAGS_SW_VLAN BIT(2)
|
|
#define ICE_TX_FLAGS_VLAN_M 0xffff0000
|
|
#define ICE_TX_FLAGS_VLAN_PR_M 0xe0000000
|
|
#define ICE_TX_FLAGS_VLAN_PR_S 29
|
|
#define ICE_TX_FLAGS_VLAN_S 16
|
|
|
|
#define ICE_RX_DMA_ATTR \
|
|
(DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
|
|
|
|
struct ice_tx_buf {
|
|
struct ice_tx_desc *next_to_watch;
|
|
struct sk_buff *skb;
|
|
unsigned int bytecount;
|
|
unsigned short gso_segs;
|
|
u32 tx_flags;
|
|
DEFINE_DMA_UNMAP_LEN(len);
|
|
DEFINE_DMA_UNMAP_ADDR(dma);
|
|
};
|
|
|
|
struct ice_tx_offload_params {
|
|
u64 cd_qw1;
|
|
struct ice_ring *tx_ring;
|
|
u32 td_cmd;
|
|
u32 td_offset;
|
|
u32 td_l2tag1;
|
|
u32 cd_tunnel_params;
|
|
u16 cd_l2tag2;
|
|
u8 header_len;
|
|
};
|
|
|
|
struct ice_rx_buf {
|
|
struct sk_buff *skb;
|
|
dma_addr_t dma;
|
|
struct page *page;
|
|
unsigned int page_offset;
|
|
u16 pagecnt_bias;
|
|
};
|
|
|
|
struct ice_q_stats {
|
|
u64 pkts;
|
|
u64 bytes;
|
|
};
|
|
|
|
struct ice_txq_stats {
|
|
u64 restart_q;
|
|
u64 tx_busy;
|
|
u64 tx_linearize;
|
|
int prev_pkt; /* negative if no pending Tx descriptors */
|
|
};
|
|
|
|
struct ice_rxq_stats {
|
|
u64 non_eop_descs;
|
|
u64 alloc_page_failed;
|
|
u64 alloc_buf_failed;
|
|
u64 page_reuse_count;
|
|
};
|
|
|
|
/* this enum matches hardware bits and is meant to be used by DYN_CTLN
|
|
* registers and QINT registers or more generally anywhere in the manual
|
|
* mentioning ITR_INDX, ITR_NONE cannot be used as an index 'n' into any
|
|
* register but instead is a special value meaning "don't update" ITR0/1/2.
|
|
*/
|
|
enum ice_dyn_idx_t {
|
|
ICE_IDX_ITR0 = 0,
|
|
ICE_IDX_ITR1 = 1,
|
|
ICE_IDX_ITR2 = 2,
|
|
ICE_ITR_NONE = 3 /* ITR_NONE must not be used as an index */
|
|
};
|
|
|
|
/* Header split modes defined by DTYPE field of Rx RLAN context */
|
|
enum ice_rx_dtype {
|
|
ICE_RX_DTYPE_NO_SPLIT = 0,
|
|
ICE_RX_DTYPE_HEADER_SPLIT = 1,
|
|
ICE_RX_DTYPE_SPLIT_ALWAYS = 2,
|
|
};
|
|
|
|
/* indices into GLINT_ITR registers */
|
|
#define ICE_RX_ITR ICE_IDX_ITR0
|
|
#define ICE_TX_ITR ICE_IDX_ITR1
|
|
#define ICE_ITR_8K 124
|
|
#define ICE_ITR_20K 50
|
|
#define ICE_ITR_MAX 8160
|
|
#define ICE_DFLT_TX_ITR (ICE_ITR_20K | ICE_ITR_DYNAMIC)
|
|
#define ICE_DFLT_RX_ITR (ICE_ITR_20K | ICE_ITR_DYNAMIC)
|
|
#define ICE_ITR_DYNAMIC 0x8000 /* used as flag for itr_setting */
|
|
#define ITR_IS_DYNAMIC(setting) (!!((setting) & ICE_ITR_DYNAMIC))
|
|
#define ITR_TO_REG(setting) ((setting) & ~ICE_ITR_DYNAMIC)
|
|
#define ICE_ITR_GRAN_S 1 /* ITR granularity is always 2us */
|
|
#define ICE_ITR_GRAN_US BIT(ICE_ITR_GRAN_S)
|
|
#define ICE_ITR_MASK 0x1FFE /* ITR register value alignment mask */
|
|
#define ITR_REG_ALIGN(setting) __ALIGN_MASK(setting, ~ICE_ITR_MASK)
|
|
|
|
#define ICE_ITR_ADAPTIVE_MIN_INC 0x0002
|
|
#define ICE_ITR_ADAPTIVE_MIN_USECS 0x0002
|
|
#define ICE_ITR_ADAPTIVE_MAX_USECS 0x00FA
|
|
#define ICE_ITR_ADAPTIVE_LATENCY 0x8000
|
|
#define ICE_ITR_ADAPTIVE_BULK 0x0000
|
|
|
|
#define ICE_DFLT_INTRL 0
|
|
#define ICE_MAX_INTRL 236
|
|
|
|
/* Legacy or Advanced Mode Queue */
|
|
#define ICE_TX_ADVANCED 0
|
|
#define ICE_TX_LEGACY 1
|
|
|
|
/* descriptor ring, associated with a VSI */
|
|
struct ice_ring {
|
|
/* CL1 - 1st cacheline starts here */
|
|
struct ice_ring *next; /* pointer to next ring in q_vector */
|
|
void *desc; /* Descriptor ring memory */
|
|
struct device *dev; /* Used for DMA mapping */
|
|
struct net_device *netdev; /* netdev ring maps to */
|
|
struct ice_vsi *vsi; /* Backreference to associated VSI */
|
|
struct ice_q_vector *q_vector; /* Backreference to associated vector */
|
|
u8 __iomem *tail;
|
|
union {
|
|
struct ice_tx_buf *tx_buf;
|
|
struct ice_rx_buf *rx_buf;
|
|
};
|
|
/* CL2 - 2nd cacheline starts here */
|
|
u16 q_index; /* Queue number of ring */
|
|
u16 q_handle; /* Queue handle per TC */
|
|
|
|
u8 ring_active:1; /* is ring online or not */
|
|
|
|
u16 count; /* Number of descriptors */
|
|
u16 reg_idx; /* HW register index of the ring */
|
|
|
|
/* used in interrupt processing */
|
|
u16 next_to_use;
|
|
u16 next_to_clean;
|
|
u16 next_to_alloc;
|
|
|
|
/* stats structs */
|
|
struct ice_q_stats stats;
|
|
struct u64_stats_sync syncp;
|
|
union {
|
|
struct ice_txq_stats tx_stats;
|
|
struct ice_rxq_stats rx_stats;
|
|
};
|
|
|
|
struct rcu_head rcu; /* to avoid race on free */
|
|
/* CLX - the below items are only accessed infrequently and should be
|
|
* in their own cache line if possible
|
|
*/
|
|
dma_addr_t dma; /* physical address of ring */
|
|
unsigned int size; /* length of descriptor ring in bytes */
|
|
u32 txq_teid; /* Added Tx queue TEID */
|
|
u16 rx_buf_len;
|
|
#ifdef CONFIG_DCB
|
|
u8 dcb_tc; /* Traffic class of ring */
|
|
#endif /* CONFIG_DCB */
|
|
} ____cacheline_internodealigned_in_smp;
|
|
|
|
struct ice_ring_container {
|
|
/* head of linked-list of rings */
|
|
struct ice_ring *ring;
|
|
unsigned long next_update; /* jiffies value of next queue update */
|
|
unsigned int total_bytes; /* total bytes processed this int */
|
|
unsigned int total_pkts; /* total packets processed this int */
|
|
u16 itr_idx; /* index in the interrupt vector */
|
|
u16 target_itr; /* value in usecs divided by the hw->itr_gran */
|
|
u16 current_itr; /* value in usecs divided by the hw->itr_gran */
|
|
/* high bit set means dynamic ITR, rest is used to store user
|
|
* readable ITR value in usecs and must be converted before programming
|
|
* to a register.
|
|
*/
|
|
u16 itr_setting;
|
|
};
|
|
|
|
/* iterator for handling rings in ring container */
|
|
#define ice_for_each_ring(pos, head) \
|
|
for (pos = (head).ring; pos; pos = pos->next)
|
|
|
|
bool ice_alloc_rx_bufs(struct ice_ring *rxr, u16 cleaned_count);
|
|
netdev_tx_t ice_start_xmit(struct sk_buff *skb, struct net_device *netdev);
|
|
void ice_clean_tx_ring(struct ice_ring *tx_ring);
|
|
void ice_clean_rx_ring(struct ice_ring *rx_ring);
|
|
int ice_setup_tx_ring(struct ice_ring *tx_ring);
|
|
int ice_setup_rx_ring(struct ice_ring *rx_ring);
|
|
void ice_free_tx_ring(struct ice_ring *tx_ring);
|
|
void ice_free_rx_ring(struct ice_ring *rx_ring);
|
|
int ice_napi_poll(struct napi_struct *napi, int budget);
|
|
|
|
#endif /* _ICE_TXRX_H_ */
|