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       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                 :            : #include <linux/kernel.h>
      19                 :            : #include <linux/errno.h>
      20                 :            : #include <linux/types.h>
      21                 :            : #include <linux/pci.h>
      22                 :            : #include <linux/delay.h>
      23                 :            : #include "vnic_dev.h"
      24                 :            : #include "vnic_intr.h"
      25                 :            : 
      26                 :          0 : void svnic_intr_free(struct vnic_intr *intr)
      27                 :            : {
      28                 :          0 :         intr->ctrl = NULL;
      29                 :          0 : }
      30                 :            : 
      31                 :          0 : int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
      32                 :            :         unsigned int index)
      33                 :            : {
      34                 :          0 :         intr->index = index;
      35                 :          0 :         intr->vdev = vdev;
      36                 :            : 
      37                 :          0 :         intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
      38         [ #  # ]:          0 :         if (!intr->ctrl) {
      39                 :          0 :                 pr_err("Failed to hook INTR[%d].ctrl resource\n",
      40                 :            :                         index);
      41                 :          0 :                 return -EINVAL;
      42                 :            :         }
      43                 :            : 
      44                 :            :         return 0;
      45                 :            : }
      46                 :            : 
      47                 :          0 : void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
      48                 :            :         unsigned int coalescing_type, unsigned int mask_on_assertion)
      49                 :            : {
      50                 :          0 :         iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
      51                 :          0 :         iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
      52                 :          0 :         iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
      53                 :          0 :         iowrite32(0, &intr->ctrl->int_credits);
      54                 :          0 : }
      55                 :            : 
      56                 :          0 : void svnic_intr_clean(struct vnic_intr *intr)
      57                 :            : {
      58                 :          0 :         iowrite32(0, &intr->ctrl->int_credits);
      59                 :          0 : }