LXR linux/drivers/net/enic/enic

   1/*
   2 * Copyright 2008 Cisco Systems, Inc.  All rights reserved.
   3 * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4 *
   5 * This program is free software; you may redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; version 2 of the License.
   8 *
   9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16 * SOFTWARE.
  17 *
  18 */
  19
  20#ifndef _ENIC_RES_H_
  21#define _ENIC_RES_H_
  22
  23#include "wq_enet_desc.h"
  24#include "rq_enet_desc.h"
  25#include "vnic_wq.h"
  26#include "vnic_rq.h"
  27
  28#define ENIC_MIN_WQ_DESCS               64
  29#define ENIC_MAX_WQ_DESCS               4096
  30#define ENIC_MIN_RQ_DESCS               64
  31#define ENIC_MAX_RQ_DESCS               4096
  32
  33#define ENIC_MIN_MTU                    576  /* minimum for IPv4 */
  34#define ENIC_MAX_MTU                    9000
  35
  36#define ENIC_MULTICAST_PERFECT_FILTERS  32
  37
  38#define ENIC_NON_TSO_MAX_DESC           16
  39
  40#define ENIC_SETTING(enic, f) ((enic->config.flags & VENETF_##f) ? 1 : 0)
  41
  42static inline void enic_queue_wq_desc_ex(struct vnic_wq *wq,
  43        void *os_buf, dma_addr_t dma_addr, unsigned int len,
  44        unsigned int mss_or_csum_offset, unsigned int hdr_len,
  45        int vlan_tag_insert, unsigned int vlan_tag,
  46        int offload_mode, int cq_entry, int sop, int eop)
  47{
  48        struct wq_enet_desc *desc = vnic_wq_next_desc(wq);
  49
  50        wq_enet_desc_enc(desc,
  51                (u64)dma_addr | VNIC_PADDR_TARGET,
  52                (u16)len,
  53                (u16)mss_or_csum_offset,
  54                (u16)hdr_len, (u8)offload_mode,
  55                (u8)eop, (u8)cq_entry,
  56                0, /* fcoe_encap */
  57                (u8)vlan_tag_insert,
  58                (u16)vlan_tag,
  59                0 /* loopback */);
  60
  61        wmb();
  62
  63        vnic_wq_post(wq, os_buf, dma_addr, len, sop, eop);
  64}
  65
  66static inline void enic_queue_wq_desc_cont(struct vnic_wq *wq,
  67        void *os_buf, dma_addr_t dma_addr, unsigned int len, int eop)
  68{
  69        enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
  70                0, 0, 0, 0, 0,
  71                eop, 0 /* !SOP */, eop);
  72}
  73
  74static inline void enic_queue_wq_desc(struct vnic_wq *wq, void *os_buf,
  75        dma_addr_t dma_addr, unsigned int len, int vlan_tag_insert,
  76        unsigned int vlan_tag, int eop)
  77{
  78        enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
  79                0, 0, vlan_tag_insert, vlan_tag,
  80                WQ_ENET_OFFLOAD_MODE_CSUM,
  81                eop, 1 /* SOP */, eop);
  82}
  83
  84static inline void enic_queue_wq_desc_csum(struct vnic_wq *wq,
  85        void *os_buf, dma_addr_t dma_addr, unsigned int len,
  86        int ip_csum, int tcpudp_csum, int vlan_tag_insert,
  87        unsigned int vlan_tag, int eop)
  88{
  89        enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
  90                (ip_csum ? 1 : 0) + (tcpudp_csum ? 2 : 0),
  91                0, vlan_tag_insert, vlan_tag,
  92                WQ_ENET_OFFLOAD_MODE_CSUM,
  93                eop, 1 /* SOP */, eop);
  94}
  95
  96static inline void enic_queue_wq_desc_csum_l4(struct vnic_wq *wq,
  97        void *os_buf, dma_addr_t dma_addr, unsigned int len,
  98        unsigned int csum_offset, unsigned int hdr_len,
  99        int vlan_tag_insert, unsigned int vlan_tag, int eop)
 100{
 101        enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
 102                csum_offset, hdr_len, vlan_tag_insert, vlan_tag,
 103                WQ_ENET_OFFLOAD_MODE_CSUM_L4,
 104                eop, 1 /* SOP */, eop);
 105}
 106
 107static inline void enic_queue_wq_desc_tso(struct vnic_wq *wq,
 108        void *os_buf, dma_addr_t dma_addr, unsigned int len,
 109        unsigned int mss, unsigned int hdr_len, int vlan_tag_insert,
 110        unsigned int vlan_tag, int eop)
 111{
 112        enic_queue_wq_desc_ex(wq, os_buf, dma_addr, len,
 113                mss, hdr_len, vlan_tag_insert, vlan_tag,
 114                WQ_ENET_OFFLOAD_MODE_TSO,
 115                eop, 1 /* SOP */, eop);
 116}
 117
 118static inline void enic_queue_rq_desc(struct vnic_rq *rq,
 119        void *os_buf, unsigned int os_buf_index,
 120        dma_addr_t dma_addr, unsigned int len)
 121{
 122        struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
 123        u8 type = os_buf_index ?
 124                RQ_ENET_TYPE_NOT_SOP : RQ_ENET_TYPE_ONLY_SOP;
 125
 126        rq_enet_desc_enc(desc,
 127                (u64)dma_addr | VNIC_PADDR_TARGET,
 128                type, (u16)len);
 129
 130        wmb();
 131
 132        vnic_rq_post(rq, os_buf, os_buf_index, dma_addr, len);
 133}
 134
 135struct enic;
 136
 137int enic_get_vnic_config(struct enic *);
 138void enic_add_station_addr(struct enic *enic);
 139void enic_add_multicast_addr(struct enic *enic, u8 *addr);
 140void enic_del_multicast_addr(struct enic *enic, u8 *addr);
 141void enic_add_vlan(struct enic *enic, u16 vlanid);
 142void enic_del_vlan(struct enic *enic, u16 vlanid);
 143int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
 144        u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
 145        u8 ig_vlan_strip_en);
 146void enic_get_res_counts(struct enic *enic);
 147void enic_init_vnic_resources(struct enic *enic);
 148int enic_alloc_vnic_resources(struct enic *);
 149void enic_free_vnic_resources(struct enic *);
 150
 151#endif /* _ENIC_RES_H_ */
 152