scsi/snic/vnic_wq.c

12 static inline int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
15 	wq->ctrl = svnic_dev_get_res(vdev, res_type, index);
16 	if (!wq->ctrl)
22 static inline int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
25 	return svnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count,
29 static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
32 	unsigned int i, j, count = wq->ring.desc_count;
36 		wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
37 		if (!wq->bufs[i]) {
45 		buf = wq->bufs[i];
48 			buf->desc = (u8 *)wq->ring.descs +
49 				wq->ring.desc_size * buf->index;
51 				buf->next = wq->bufs[0];
54 				buf->next = wq->bufs[i + 1];
62 	wq->to_use = wq->to_clean = wq->bufs[0];
67 void svnic_wq_free(struct vnic_wq *wq)
72 	vdev = wq->vdev;
74 	svnic_dev_free_desc_ring(vdev, &wq->ring);
77 		kfree(wq->bufs[i]);
78 		wq->bufs[i] = NULL;
81 	wq->ctrl = NULL;
85 int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
90 	wq->index = 0;
91 	wq->vdev = vdev;
93 	err = vnic_wq_get_ctrl(vdev, wq, 0, RES_TYPE_DEVCMD2);
100 	svnic_wq_disable(wq);
102 	err = vnic_wq_alloc_ring(vdev, wq, 0, desc_count, desc_size);
109 int svnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
114 	wq->index = index;
115 	wq->vdev = vdev;
117 	err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ);
124 	svnic_wq_disable(wq);
126 	err = vnic_wq_alloc_ring(vdev, wq, index, desc_count, desc_size);
130 	err = vnic_wq_alloc_bufs(wq);
132 		svnic_wq_free(wq);
140 void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
146 	unsigned int count = wq->ring.desc_count;
148 	paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
149 	writeq(paddr, &wq->ctrl->ring_base);
150 	iowrite32(count, &wq->ctrl->ring_size);
151 	iowrite32(fetch_index, &wq->ctrl->fetch_index);
152 	iowrite32(posted_index, &wq->ctrl->posted_index);
153 	iowrite32(cq_index, &wq->ctrl->cq_index);
154 	iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
155 	iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
156 	iowrite32(0, &wq->ctrl->error_status);
158 	wq->to_use = wq->to_clean =
159 		&wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
163 void svnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
167 	vnic_wq_init_start(wq, cq_index, 0, 0, error_interrupt_enable,
171 unsigned int svnic_wq_error_status(struct vnic_wq *wq)
173 	return ioread32(&wq->ctrl->error_status);
176 void svnic_wq_enable(struct vnic_wq *wq)
178 	iowrite32(1, &wq->ctrl->enable);
181 int svnic_wq_disable(struct vnic_wq *wq)
185 	iowrite32(0, &wq->ctrl->enable);
189 		if (!(ioread32(&wq->ctrl->running)))
194 	pr_err("Failed to disable WQ[%d]\n", wq->index);
199 void svnic_wq_clean(struct vnic_wq *wq,
200 	void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
204 	BUG_ON(ioread32(&wq->ctrl->enable));
206 	buf = wq->to_clean;
208 	while (svnic_wq_desc_used(wq) > 0) {
210 		(*buf_clean)(wq, buf);
212 		buf = wq->to_clean = buf->next;
213 		wq->ring.desc_avail++;
216 	wq->to_use = wq->to_clean = wq->bufs[0];
218 	iowrite32(0, &wq->ctrl->fetch_index);
219 	iowrite32(0, &wq->ctrl->posted_index);
220 	iowrite32(0, &wq->ctrl->error_status);
222 	svnic_dev_clear_desc_ring(&wq->ring);