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https://github.com/torvalds/linux
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c8806b6c9e
Cisco has developed a new PCI HBA interface called sNIC, which stands for SCSI NIC. This is a new storage feature supported on specialized network adapter. The new PCI function provides a uniform host interface and abstracts backend storage. [jejb: fix up checkpatch errors] Signed-off-by: Narsimhulu Musini <nmusini@cisco.com> Signed-off-by: Sesidhar Baddela <sebaddel@cisco.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: James Bottomley <JBottomley@Odin.com>
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include "vnic_dev.h"
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#include "vnic_intr.h"
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void svnic_intr_free(struct vnic_intr *intr)
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{
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intr->ctrl = NULL;
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}
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int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr,
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unsigned int index)
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{
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intr->index = index;
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intr->vdev = vdev;
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intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index);
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if (!intr->ctrl) {
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pr_err("Failed to hook INTR[%d].ctrl resource\n",
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index);
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return -EINVAL;
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}
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return 0;
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}
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void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer,
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unsigned int coalescing_type, unsigned int mask_on_assertion)
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{
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iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer);
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iowrite32(coalescing_type, &intr->ctrl->coalescing_type);
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iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion);
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iowrite32(0, &intr->ctrl->int_credits);
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}
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void svnic_intr_clean(struct vnic_intr *intr)
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{
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iowrite32(0, &intr->ctrl->int_credits);
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}
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