1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3*4882a593Smuzhiyun * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * This program is free software; you may redistribute it and/or modify
6*4882a593Smuzhiyun * it under the terms of the GNU General Public License as published by
7*4882a593Smuzhiyun * the Free Software Foundation; version 2 of the License.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16*4882a593Smuzhiyun * SOFTWARE.
17*4882a593Smuzhiyun *
18*4882a593Smuzhiyun */
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #ifndef _VNIC_CQ_H_
21*4882a593Smuzhiyun #define _VNIC_CQ_H_
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #include "cq_desc.h"
24*4882a593Smuzhiyun #include "vnic_dev.h"
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /* Completion queue control */
27*4882a593Smuzhiyun struct vnic_cq_ctrl {
28*4882a593Smuzhiyun u64 ring_base; /* 0x00 */
29*4882a593Smuzhiyun u32 ring_size; /* 0x08 */
30*4882a593Smuzhiyun u32 pad0;
31*4882a593Smuzhiyun u32 flow_control_enable; /* 0x10 */
32*4882a593Smuzhiyun u32 pad1;
33*4882a593Smuzhiyun u32 color_enable; /* 0x18 */
34*4882a593Smuzhiyun u32 pad2;
35*4882a593Smuzhiyun u32 cq_head; /* 0x20 */
36*4882a593Smuzhiyun u32 pad3;
37*4882a593Smuzhiyun u32 cq_tail; /* 0x28 */
38*4882a593Smuzhiyun u32 pad4;
39*4882a593Smuzhiyun u32 cq_tail_color; /* 0x30 */
40*4882a593Smuzhiyun u32 pad5;
41*4882a593Smuzhiyun u32 interrupt_enable; /* 0x38 */
42*4882a593Smuzhiyun u32 pad6;
43*4882a593Smuzhiyun u32 cq_entry_enable; /* 0x40 */
44*4882a593Smuzhiyun u32 pad7;
45*4882a593Smuzhiyun u32 cq_message_enable; /* 0x48 */
46*4882a593Smuzhiyun u32 pad8;
47*4882a593Smuzhiyun u32 interrupt_offset; /* 0x50 */
48*4882a593Smuzhiyun u32 pad9;
49*4882a593Smuzhiyun u64 cq_message_addr; /* 0x58 */
50*4882a593Smuzhiyun u32 pad10;
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun struct vnic_rx_bytes_counter {
54*4882a593Smuzhiyun unsigned int small_pkt_bytes_cnt;
55*4882a593Smuzhiyun unsigned int large_pkt_bytes_cnt;
56*4882a593Smuzhiyun };
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun struct vnic_cq {
59*4882a593Smuzhiyun unsigned int index;
60*4882a593Smuzhiyun struct vnic_dev *vdev;
61*4882a593Smuzhiyun struct vnic_cq_ctrl __iomem *ctrl; /* memory-mapped */
62*4882a593Smuzhiyun struct vnic_dev_ring ring;
63*4882a593Smuzhiyun unsigned int to_clean;
64*4882a593Smuzhiyun unsigned int last_color;
65*4882a593Smuzhiyun unsigned int interrupt_offset;
66*4882a593Smuzhiyun struct vnic_rx_bytes_counter pkt_size_counter;
67*4882a593Smuzhiyun unsigned int cur_rx_coal_timeval;
68*4882a593Smuzhiyun unsigned int tobe_rx_coal_timeval;
69*4882a593Smuzhiyun ktime_t prev_ts;
70*4882a593Smuzhiyun };
71*4882a593Smuzhiyun
vnic_cq_service(struct vnic_cq * cq,unsigned int work_to_do,int (* q_service)(struct vnic_dev * vdev,struct cq_desc * cq_desc,u8 type,u16 q_number,u16 completed_index,void * opaque),void * opaque)72*4882a593Smuzhiyun static inline unsigned int vnic_cq_service(struct vnic_cq *cq,
73*4882a593Smuzhiyun unsigned int work_to_do,
74*4882a593Smuzhiyun int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
75*4882a593Smuzhiyun u8 type, u16 q_number, u16 completed_index, void *opaque),
76*4882a593Smuzhiyun void *opaque)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun struct cq_desc *cq_desc;
79*4882a593Smuzhiyun unsigned int work_done = 0;
80*4882a593Smuzhiyun u16 q_number, completed_index;
81*4882a593Smuzhiyun u8 type, color;
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
84*4882a593Smuzhiyun cq->ring.desc_size * cq->to_clean);
85*4882a593Smuzhiyun cq_desc_dec(cq_desc, &type, &color,
86*4882a593Smuzhiyun &q_number, &completed_index);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun while (color != cq->last_color) {
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun if ((*q_service)(cq->vdev, cq_desc, type,
91*4882a593Smuzhiyun q_number, completed_index, opaque))
92*4882a593Smuzhiyun break;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun cq->to_clean++;
95*4882a593Smuzhiyun if (cq->to_clean == cq->ring.desc_count) {
96*4882a593Smuzhiyun cq->to_clean = 0;
97*4882a593Smuzhiyun cq->last_color = cq->last_color ? 0 : 1;
98*4882a593Smuzhiyun }
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
101*4882a593Smuzhiyun cq->ring.desc_size * cq->to_clean);
102*4882a593Smuzhiyun cq_desc_dec(cq_desc, &type, &color,
103*4882a593Smuzhiyun &q_number, &completed_index);
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun work_done++;
106*4882a593Smuzhiyun if (work_done >= work_to_do)
107*4882a593Smuzhiyun break;
108*4882a593Smuzhiyun }
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun return work_done;
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun void vnic_cq_free(struct vnic_cq *cq);
114*4882a593Smuzhiyun int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
115*4882a593Smuzhiyun unsigned int desc_count, unsigned int desc_size);
116*4882a593Smuzhiyun void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
117*4882a593Smuzhiyun unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
118*4882a593Smuzhiyun unsigned int cq_tail_color, unsigned int interrupt_enable,
119*4882a593Smuzhiyun unsigned int cq_entry_enable, unsigned int message_enable,
120*4882a593Smuzhiyun unsigned int interrupt_offset, u64 message_addr);
121*4882a593Smuzhiyun void vnic_cq_clean(struct vnic_cq *cq);
122*4882a593Smuzhiyun
123*4882a593Smuzhiyun #endif /* _VNIC_CQ_H_ */
124