Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / scsi / fnic / vnic_cq.h

diff --git a/kernel/drivers/scsi/fnic/vnic_cq.h b/kernel/drivers/scsi/fnic/vnic_cq.h
new file mode 100644 (file)
index 0000000..4ede680
--- /dev/null
+++ b/kernel/drivers/scsi/fnic/vnic_cq.h
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
+ * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _VNIC_CQ_H_
+#define _VNIC_CQ_H_
+
+#include "cq_desc.h"
+#include "vnic_dev.h"
+
+/*
+ * These defines avoid symbol clash between fnic and enic (Cisco 10G Eth
+ * Driver) when both are built with CONFIG options =y
+ */
+#define vnic_cq_service fnic_cq_service
+#define vnic_cq_free fnic_cq_free
+#define vnic_cq_alloc fnic_cq_alloc
+#define vnic_cq_init fnic_cq_init
+#define vnic_cq_clean fnic_cq_clean
+
+/* Completion queue control */
+struct vnic_cq_ctrl {
+       u64 ring_base;                  /* 0x00 */
+       u32 ring_size;                  /* 0x08 */
+       u32 pad0;
+       u32 flow_control_enable;        /* 0x10 */
+       u32 pad1;
+       u32 color_enable;               /* 0x18 */
+       u32 pad2;
+       u32 cq_head;                    /* 0x20 */
+       u32 pad3;
+       u32 cq_tail;                    /* 0x28 */
+       u32 pad4;
+       u32 cq_tail_color;              /* 0x30 */
+       u32 pad5;
+       u32 interrupt_enable;           /* 0x38 */
+       u32 pad6;
+       u32 cq_entry_enable;            /* 0x40 */
+       u32 pad7;
+       u32 cq_message_enable;          /* 0x48 */
+       u32 pad8;
+       u32 interrupt_offset;           /* 0x50 */
+       u32 pad9;
+       u64 cq_message_addr;            /* 0x58 */
+       u32 pad10;
+};
+
+struct vnic_cq {
+       unsigned int index;
+       struct vnic_dev *vdev;
+       struct vnic_cq_ctrl __iomem *ctrl;      /* memory-mapped */
+       struct vnic_dev_ring ring;
+       unsigned int to_clean;
+       unsigned int last_color;
+};
+
+static inline unsigned int 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)
+{
+       struct cq_desc *cq_desc;
+       unsigned int work_done = 0;
+       u16 q_number, completed_index;
+       u8 type, color;
+
+       cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+               cq->ring.desc_size * cq->to_clean);
+       cq_desc_dec(cq_desc, &type, &color,
+               &q_number, &completed_index);
+
+       while (color != cq->last_color) {
+
+               if ((*q_service)(cq->vdev, cq_desc, type,
+                       q_number, completed_index, opaque))
+                       break;
+
+               cq->to_clean++;
+               if (cq->to_clean == cq->ring.desc_count) {
+                       cq->to_clean = 0;
+                       cq->last_color = cq->last_color ? 0 : 1;
+               }
+
+               cq_desc = (struct cq_desc *)((u8 *)cq->ring.descs +
+                       cq->ring.desc_size * cq->to_clean);
+               cq_desc_dec(cq_desc, &type, &color,
+                       &q_number, &completed_index);
+
+               work_done++;
+               if (work_done >= work_to_do)
+                       break;
+       }
+
+       return work_done;
+}
+
+void vnic_cq_free(struct vnic_cq *cq);
+int vnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, unsigned int index,
+       unsigned int desc_count, unsigned int desc_size);
+void vnic_cq_init(struct vnic_cq *cq, unsigned int flow_control_enable,
+       unsigned int color_enable, unsigned int cq_head, unsigned int cq_tail,
+       unsigned int cq_tail_color, unsigned int interrupt_enable,
+       unsigned int cq_entry_enable, unsigned int message_enable,
+       unsigned int interrupt_offset, u64 message_addr);
+void vnic_cq_clean(struct vnic_cq *cq);
+
+#endif /* _VNIC_CQ_H_ */