1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright (c) 2018, Intel Corporation. */
7 #define ICE_DFLT_IRQ_WORK 256
8 #define ICE_RXBUF_2048 2048
9 #define ICE_MAX_CHAINED_RX_BUFS 5
10 #define ICE_MAX_BUF_TXD 8
11 #define ICE_MIN_TX_LEN 17
13 /* The size limit for a transmit buffer in a descriptor is (16K - 1).
14 * In order to align with the read requests we will align the value to
15 * the nearest 4K which represents our maximum read request size.
17 #define ICE_MAX_READ_REQ_SIZE 4096
18 #define ICE_MAX_DATA_PER_TXD (16 * 1024 - 1)
19 #define ICE_MAX_DATA_PER_TXD_ALIGNED \
20 (~(ICE_MAX_READ_REQ_SIZE - 1) & ICE_MAX_DATA_PER_TXD)
22 #define ICE_RX_BUF_WRITE 16 /* Must be power of 2 */
23 #define ICE_MAX_TXQ_PER_TXQG 128
25 /* We are assuming that the cache line is always 64 Bytes here for ice.
26 * In order to make sure that is a correct assumption there is a check in probe
27 * to print a warning if the read from GLPCI_CNF2 tells us that the cache line
28 * size is 128 bytes. We do it this way because we do not want to read the
29 * GLPCI_CNF2 register or a variable containing the value on every pass through
32 #define ICE_CACHE_LINE_BYTES 64
33 #define ICE_DESCS_PER_CACHE_LINE (ICE_CACHE_LINE_BYTES / \
34 sizeof(struct ice_tx_desc))
35 #define ICE_DESCS_FOR_CTX_DESC 1
36 #define ICE_DESCS_FOR_SKB_DATA_PTR 1
37 /* Tx descriptors needed, worst case */
38 #define DESC_NEEDED (MAX_SKB_FRAGS + ICE_DESCS_FOR_CTX_DESC + \
39 ICE_DESCS_PER_CACHE_LINE + ICE_DESCS_FOR_SKB_DATA_PTR)
40 #define ICE_DESC_UNUSED(R) \
41 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
42 (R)->next_to_clean - (R)->next_to_use - 1)
44 #define ICE_TX_FLAGS_TSO BIT(0)
45 #define ICE_TX_FLAGS_HW_VLAN BIT(1)
46 #define ICE_TX_FLAGS_SW_VLAN BIT(2)
47 #define ICE_TX_FLAGS_VLAN_M 0xffff0000
48 #define ICE_TX_FLAGS_VLAN_S 16
50 #define ICE_RX_DMA_ATTR \
51 (DMA_ATTR_SKIP_CPU_SYNC | DMA_ATTR_WEAK_ORDERING)
54 struct ice_tx_desc *next_to_watch;
56 unsigned int bytecount;
57 unsigned short gso_segs;
59 DEFINE_DMA_UNMAP_ADDR(dma);
60 DEFINE_DMA_UNMAP_LEN(len);
63 struct ice_tx_offload_params {
71 struct ice_ring *tx_ring;
78 unsigned int page_offset;
87 struct ice_txq_stats {
91 int prev_pkt; /* negative if no pending Tx descriptors */
94 struct ice_rxq_stats {
96 u64 alloc_page_failed;
101 /* this enum matches hardware bits and is meant to be used by DYN_CTLN
102 * registers and QINT registers or more generally anywhere in the manual
103 * mentioning ITR_INDX, ITR_NONE cannot be used as an index 'n' into any
104 * register but instead is a special value meaning "don't update" ITR0/1/2.
110 ICE_ITR_NONE = 3 /* ITR_NONE must not be used as an index */
113 /* Header split modes defined by DTYPE field of Rx RLAN context */
115 ICE_RX_DTYPE_NO_SPLIT = 0,
116 ICE_RX_DTYPE_HEADER_SPLIT = 1,
117 ICE_RX_DTYPE_SPLIT_ALWAYS = 2,
120 /* indices into GLINT_ITR registers */
121 #define ICE_RX_ITR ICE_IDX_ITR0
122 #define ICE_TX_ITR ICE_IDX_ITR1
123 #define ICE_ITR_8K 124
124 #define ICE_ITR_20K 50
125 #define ICE_ITR_MAX 8160
126 #define ICE_DFLT_TX_ITR (ICE_ITR_20K | ICE_ITR_DYNAMIC)
127 #define ICE_DFLT_RX_ITR (ICE_ITR_20K | ICE_ITR_DYNAMIC)
128 #define ICE_ITR_DYNAMIC 0x8000 /* used as flag for itr_setting */
129 #define ITR_IS_DYNAMIC(setting) (!!((setting) & ICE_ITR_DYNAMIC))
130 #define ITR_TO_REG(setting) ((setting) & ~ICE_ITR_DYNAMIC)
131 #define ICE_ITR_GRAN_S 1 /* Assume ITR granularity is 2us */
132 #define ICE_ITR_GRAN_US BIT(ICE_ITR_GRAN_S)
133 #define ICE_ITR_MASK 0x1FFE /* ITR register value alignment mask */
134 #define ITR_REG_ALIGN(setting) __ALIGN_MASK(setting, ~ICE_ITR_MASK)
136 #define ICE_ITR_ADAPTIVE_MIN_INC 0x0002
137 #define ICE_ITR_ADAPTIVE_MIN_USECS 0x0002
138 #define ICE_ITR_ADAPTIVE_MAX_USECS 0x00FA
139 #define ICE_ITR_ADAPTIVE_LATENCY 0x8000
140 #define ICE_ITR_ADAPTIVE_BULK 0x0000
142 #define ICE_DFLT_INTRL 0
144 /* Legacy or Advanced Mode Queue */
145 #define ICE_TX_ADVANCED 0
146 #define ICE_TX_LEGACY 1
148 /* descriptor ring, associated with a VSI */
150 struct ice_ring *next; /* pointer to next ring in q_vector */
151 void *desc; /* Descriptor ring memory */
152 struct device *dev; /* Used for DMA mapping */
153 struct net_device *netdev; /* netdev ring maps to */
154 struct ice_vsi *vsi; /* Backreference to associated VSI */
155 struct ice_q_vector *q_vector; /* Backreference to associated vector */
158 struct ice_tx_buf *tx_buf;
159 struct ice_rx_buf *rx_buf;
161 u16 q_index; /* Queue number of ring */
162 u32 txq_teid; /* Added Tx queue TEID */
164 u16 count; /* Number of descriptors */
165 u16 reg_idx; /* HW register index of the ring */
167 /* used in interrupt processing */
171 u8 ring_active; /* is ring online or not */
174 struct ice_q_stats stats;
175 struct u64_stats_sync syncp;
177 struct ice_txq_stats tx_stats;
178 struct ice_rxq_stats rx_stats;
181 unsigned int size; /* length of descriptor ring in bytes */
182 dma_addr_t dma; /* physical address of ring */
183 struct rcu_head rcu; /* to avoid race on free */
185 } ____cacheline_internodealigned_in_smp;
187 struct ice_ring_container {
188 /* head of linked-list of rings */
189 struct ice_ring *ring;
190 unsigned long next_update; /* jiffies value of next queue update */
191 unsigned int total_bytes; /* total bytes processed this int */
192 unsigned int total_pkts; /* total packets processed this int */
193 u16 itr_idx; /* index in the interrupt vector */
194 u16 target_itr; /* value in usecs divided by the hw->itr_gran */
195 u16 current_itr; /* value in usecs divided by the hw->itr_gran */
196 /* high bit set means dynamic ITR, rest is used to store user
197 * readable ITR value in usecs and must be converted before programming
203 /* iterator for handling rings in ring container */
204 #define ice_for_each_ring(pos, head) \
205 for (pos = (head).ring; pos; pos = pos->next)
207 bool ice_alloc_rx_bufs(struct ice_ring *rxr, u16 cleaned_count);
208 netdev_tx_t ice_start_xmit(struct sk_buff *skb, struct net_device *netdev);
209 void ice_clean_tx_ring(struct ice_ring *tx_ring);
210 void ice_clean_rx_ring(struct ice_ring *rx_ring);
211 int ice_setup_tx_ring(struct ice_ring *tx_ring);
212 int ice_setup_rx_ring(struct ice_ring *rx_ring);
213 void ice_free_tx_ring(struct ice_ring *tx_ring);
214 void ice_free_rx_ring(struct ice_ring *rx_ring);
215 int ice_napi_poll(struct napi_struct *napi, int budget);
217 #endif /* _ICE_TXRX_H_ */