[SCSI] be2iscsi: add 10Gbps iSCSI - BladeEngine 2 driver

[v2: fixed up virt_to_bus() issue spotted by sfr]
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Jayamohan Kallickal <jayamohank@serverengines.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 183 insertions, 0 deletions

diff --git a/drivers/scsi/be2iscsi/be.h b/drivers/scsi/be2iscsi/be.h
new file mode 100644
index 000000000000..b36020dcf012
--- /dev/null
+++ b/drivers/scsi/be2iscsi/be.h
@@ -0,0 +1,183 @@
+/**
+ * Copyright (C) 2005 - 2009 ServerEngines
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.  The full GNU General
+ * Public License is included in this distribution in the file called COPYING.
+ *
+ * Contact Information:
+ * linux-drivers@serverengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ */
+
+#ifndef BEISCSI_H
+#define BEISCSI_H
+
+#include <linux/pci.h>
+#include <linux/if_vlan.h>
+
+#define FW_VER_LEN 32
+
+struct be_dma_mem {
+        void *va;
+        dma_addr_t dma;
+        u32 size;
+};
+
+struct be_queue_info {
+        struct be_dma_mem dma_mem;
+        u16 len;
+        u16 entry_size;         /* Size of an element in the queue */
+        u16 id;
+        u16 tail, head;
+        bool created;
+        atomic_t used;          /* Number of valid elements in the queue */
+};
+
+static inline u32 MODULO(u16 val, u16 limit)
+{
+        WARN_ON(limit & (limit - 1));
+        return val & (limit - 1);
+}
+
+static inline void index_inc(u16 *index, u16 limit)
+{
+        *index = MODULO((*index + 1), limit);
+}
+
+static inline void *queue_head_node(struct be_queue_info *q)
+{
+        return q->dma_mem.va + q->head * q->entry_size;
+}
+
+static inline void *queue_tail_node(struct be_queue_info *q)
+{
+        return q->dma_mem.va + q->tail * q->entry_size;
+}
+
+static inline void queue_head_inc(struct be_queue_info *q)
+{
+        index_inc(&q->head, q->len);
+}
+
+static inline void queue_tail_inc(struct be_queue_info *q)
+{
+        index_inc(&q->tail, q->len);
+}
+
+/*ISCSI */
+
+struct be_eq_obj {
+        struct be_queue_info q;
+        char desc[32];
+
+        /* Adaptive interrupt coalescing (AIC) info */
+        bool enable_aic;
+        u16 min_eqd;            /* in usecs */
+        u16 max_eqd;            /* in usecs */
+        u16 cur_eqd;            /* in usecs */
+};
+
+struct be_mcc_obj {
+        struct be_queue_info *q;
+        struct be_queue_info *cq;
+};
+
+struct be_ctrl_info {
+        u8 __iomem *csr;
+        u8 __iomem *db;         /* Door Bell */
+        u8 __iomem *pcicfg;     /* PCI config space */
+        struct pci_dev *pdev;
+
+        /* Mbox used for cmd request/response */
+        spinlock_t mbox_lock;   /* For serializing mbox cmds to BE card */
+        struct be_dma_mem mbox_mem;
+        /* Mbox mem is adjusted to align to 16 bytes. The allocated addr
+         * is stored for freeing purpose */
+        struct be_dma_mem mbox_mem_alloced;
+
+        /* MCC Rings */
+        struct be_mcc_obj mcc_obj;
+        spinlock_t mcc_lock;    /* For serializing mcc cmds to BE card */
+        spinlock_t mcc_cq_lock;
+
+        /* MCC Async callback */
+        void (*async_cb) (void *adapter, bool link_up);
+        void *adapter_ctxt;
+};
+
+#include "be_cmds.h"
+
+#define PAGE_SHIFT_4K 12
+#define PAGE_SIZE_4K (1 << PAGE_SHIFT_4K)
+
+/* Returns number of pages spanned by the data starting at the given addr */
+#define PAGES_4K_SPANNED(_address, size)                                \
+                ((u32)((((size_t)(_address) & (PAGE_SIZE_4K - 1)) +     \
+                        (size) + (PAGE_SIZE_4K - 1)) >> PAGE_SHIFT_4K))
+
+/* Byte offset into the page corresponding to given address */
+#define OFFSET_IN_PAGE(addr)                                            \
+                ((size_t)(addr) & (PAGE_SIZE_4K-1))
+
+/* Returns bit offset within a DWORD of a bitfield */
+#define AMAP_BIT_OFFSET(_struct, field)                                 \
+                (((size_t)&(((_struct *)0)->field))%32)
+
+/* Returns the bit mask of the field that is NOT shifted into location. */
+static inline u32 amap_mask(u32 bitsize)
+{
+        return (bitsize == 32 ? 0xFFFFFFFF : (1 << bitsize) - 1);
+}
+
+static inline void amap_set(void *ptr, u32 dw_offset, u32 mask,
+                                        u32 offset, u32 value)
+{
+        u32 *dw = (u32 *) ptr + dw_offset;
+        *dw &= ~(mask << offset);
+        *dw |= (mask & value) << offset;
+}
+
+#define AMAP_SET_BITS(_struct, field, ptr, val)                         \
+                amap_set(ptr,                                           \
+                        offsetof(_struct, field)/32,                    \
+                        amap_mask(sizeof(((_struct *)0)->field)),       \
+                        AMAP_BIT_OFFSET(_struct, field),                \
+                        val)
+
+static inline u32 amap_get(void *ptr, u32 dw_offset, u32 mask, u32 offset)
+{
+        u32 *dw = ptr;
+        return mask & (*(dw + dw_offset) >> offset);
+}
+
+#define AMAP_GET_BITS(_struct, field, ptr)                              \
+                amap_get(ptr,                                           \
+                        offsetof(_struct, field)/32,                    \
+                        amap_mask(sizeof(((_struct *)0)->field)),       \
+                        AMAP_BIT_OFFSET(_struct, field))
+
+#define be_dws_cpu_to_le(wrb, len) swap_dws(wrb, len)
+#define be_dws_le_to_cpu(wrb, len) swap_dws(wrb, len)
+static inline void swap_dws(void *wrb, int len)
+{
+#ifdef __BIG_ENDIAN
+        u32 *dw = wrb;
+        WARN_ON(len % 4);
+        do {
+                *dw = cpu_to_le32(*dw);
+                dw++;
+                len -= 4;
+        } while (len);
+#endif /* __BIG_ENDIAN */
+}
+
+extern void beiscsi_cq_notify(struct be_ctrl_info *ctrl, u16 qid, bool arm,
+                              u16 num_popped);
+
+#endif /* BEISCSI_H */