LCOV - code coverage report
Current view: top level - drivers/scsi/snic - vnic_cq.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 20 0.0 %
Date: 2022-04-01 14:17:54 Functions: 0 1 0.0 %
Branches: 0 8 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright 2014 Cisco Systems, Inc.  All rights reserved.
       3                 :            :  *
       4                 :            :  * This program is free software; you may redistribute it and/or modify
       5                 :            :  * it under the terms of the GNU General Public License as published by
       6                 :            :  * the Free Software Foundation; version 2 of the License.
       7                 :            :  *
       8                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
       9                 :            :  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
      10                 :            :  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
      11                 :            :  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
      12                 :            :  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
      13                 :            :  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
      14                 :            :  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      15                 :            :  * SOFTWARE.
      16                 :            :  */
      17                 :            : 
      18                 :            : #ifndef _VNIC_CQ_H_
      19                 :            : #define _VNIC_CQ_H_
      20                 :            : 
      21                 :            : #include "cq_desc.h"
      22                 :            : #include "vnic_dev.h"
      23                 :            : 
      24                 :            : /* Completion queue control */
      25                 :            : struct vnic_cq_ctrl {
      26                 :            :         u64 ring_base;                  /* 0x00 */
      27                 :            :         u32 ring_size;                  /* 0x08 */
      28                 :            :         u32 pad0;
      29                 :            :         u32 flow_control_enable;        /* 0x10 */
      30                 :            :         u32 pad1;
      31                 :            :         u32 color_enable;               /* 0x18 */
      32                 :            :         u32 pad2;
      33                 :            :         u32 cq_head;                    /* 0x20 */
      34                 :            :         u32 pad3;
      35                 :            :         u32 cq_tail;                    /* 0x28 */
      36                 :            :         u32 pad4;
      37                 :            :         u32 cq_tail_color;              /* 0x30 */
      38                 :            :         u32 pad5;
      39                 :            :         u32 interrupt_enable;           /* 0x38 */
      40                 :            :         u32 pad6;
      41                 :            :         u32 cq_entry_enable;            /* 0x40 */
      42                 :            :         u32 pad7;
      43                 :            :         u32 cq_message_enable;          /* 0x48 */
      44                 :            :         u32 pad8;
      45                 :            :         u32 interrupt_offset;           /* 0x50 */
      46                 :            :         u32 pad9;
      47                 :            :         u64 cq_message_addr;            /* 0x58 */
      48                 :            :         u32 pad10;
      49                 :            : };
      50                 :            : 
      51                 :            : struct vnic_cq {
      52                 :            :         unsigned int index;
      53                 :            :         struct vnic_dev *vdev;
      54                 :            :         struct vnic_cq_ctrl __iomem *ctrl;      /* memory-mapped */
      55                 :            :         struct vnic_dev_ring ring;
      56                 :            :         unsigned int to_clean;
      57                 :            :         unsigned int last_color;
      58                 :            : };
      59                 :            : 
      60                 :          0 : static inline unsigned int svnic_cq_service(struct vnic_cq *cq,
      61                 :            :         unsigned int work_to_do,
      62                 :            :         int (*q_service)(struct vnic_dev *vdev, struct cq_desc *cq_desc,
      63                 :            :         u8 type, u16 q_number, u16 completed_index, void *opaque),
      64                 :            :         void *opaque)
      65                 :            : {
      66                 :          0 :         struct cq_desc *cq_desc;
      67                 :          0 :         unsigned int work_done = 0;
      68                 :          0 :         u16 q_number, completed_index;
      69                 :          0 :         u8 type, color;
      70                 :            : 
      71                 :          0 :         cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
      72                 :          0 :                 cq->ring.desc_size * cq->to_clean);
      73                 :          0 :         cq_desc_dec(cq_desc, &type, &color,
      74                 :            :                 &q_number, &completed_index);
      75                 :            : 
      76         [ #  # ]:          0 :         while (color != cq->last_color) {
      77                 :            : 
      78         [ #  # ]:          0 :                 if ((*q_service)(cq->vdev, cq_desc, type,
      79                 :            :                         q_number, completed_index, opaque))
      80                 :            :                         break;
      81                 :            : 
      82                 :          0 :                 cq->to_clean++;
      83         [ #  # ]:          0 :                 if (cq->to_clean == cq->ring.desc_count) {
      84                 :          0 :                         cq->to_clean = 0;
      85                 :          0 :                         cq->last_color = cq->last_color ? 0 : 1;
      86                 :            :                 }
      87                 :            : 
      88                 :          0 :                 cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
      89                 :          0 :                         cq->ring.desc_size * cq->to_clean);
      90                 :          0 :                 cq_desc_dec(cq_desc, &type, &color,
      91                 :            :                         &q_number, &completed_index);
      92                 :            : 
      93                 :          0 :                 work_done++;
      94         [ #  # ]:          0 :                 if (work_done >= work_to_do)
      95                 :            :                         break;
      96                 :            :         }
      97                 :            : 
      98                 :          0 :         return work_done;
      99                 :            : }
     100                 :            : 
     101                 :            : void svnic_cq_free(struct vnic_cq *cq);
     102                 :            : int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq,
     103                 :            :         unsigned int index, unsigned int desc_count, unsigned int desc_size);
     104                 :            : void svnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
     105                 :            :         unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
     106                 :            :         unsigned int cq_tail_color, unsigned int interrupt_enable,
     107                 :            :         unsigned int cq_entry_enable, unsigned int message_enable,
     108                 :            :         unsigned int interrupt_offset, u64 message_addr);
     109                 :            : void svnic_cq_clean(struct vnic_cq *cq);
     110                 :            : #endif /* _VNIC_CQ_H_ */

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