From patchwork Fri May 29 08:04:06 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Narsimhulu Musini X-Patchwork-Id: 6504811 Return-Path: X-Original-To: patchwork-linux-scsi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 1E8DC9F46A for ; Fri, 29 May 2015 08:09:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1938C206E5 for ; Fri, 29 May 2015 08:09:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8E8AC2070D for ; Fri, 29 May 2015 08:09:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755708AbbE2IJs (ORCPT ); Fri, 29 May 2015 04:09:48 -0400 Received: from alln-iport-8.cisco.com ([173.37.142.95]:59451 "EHLO alln-iport-8.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755695AbbE2IJI (ORCPT ); Fri, 29 May 2015 04:09:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=74225; q=dns/txt; s=iport; t=1432886947; x=1434096547; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=BDWEXZSj7NV+9/H4E7T1x96xoYjsK9eMDc3PereREyg=; b=ReJgiyOBWr0DHLjqLiYEseH/v98A3sraTRUg7g34MAoibjDHigp82bsn X/9rqq7bT7q5kaaIdnBARRPa6bI+pHuKAXeD0qwlAcOFJhg1/l+eFvCHA SXPb+vQ8g5zSKHG02etSV8LJYuUIEUeDsqC1xZF0EOZfInMlVDMuD4/xP w=; X-IronPort-AV: E=Sophos;i="5.13,515,1427760000"; d="scan'208";a="154357210" Received: from alln-core-5.cisco.com ([173.36.13.138]) by alln-iport-8.cisco.com with ESMTP; 29 May 2015 08:09:07 +0000 Received: from hishah-lnx.cisco.com (dhcp-171-71-13-47.cisco.com [171.71.13.47]) (authenticated bits=0) by alln-core-5.cisco.com (8.14.5/8.14.5) with ESMTP id t4T88vdw000900 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 29 May 2015 08:09:06 GMT From: Narsimhulu Musini To: James.Bottomley@HansenPartnership.com, linux-scsi@vger.kernel.org, hare@suse.de, boaz@plexistor.com, jthumshirn@suse.de Cc: Narsimhulu Musini , Sesidhar Baddela Subject: [PATCH v7 6/9] snic:Add low level queuing interfaces Date: Fri, 29 May 2015 01:04:06 -0700 Message-Id: <1432886649-12034-7-git-send-email-nmusini@cisco.com> X-Mailer: git-send-email 1.8.5.4 In-Reply-To: <1432886649-12034-1-git-send-email-nmusini@cisco.com> References: <1432886649-12034-1-git-send-email-nmusini@cisco.com> X-Authenticated-User: nmusini@cisco.com Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Spam-Status: No, score=-14.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY, USER_IN_DEF_DKIM_WL autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP These files contain low level queueing interfaces includes hardware queues, and management of hardware features. Signed-off-by: Narsimhulu Musini Signed-off-by: Sesidhar Baddela Reviewed-by: Hannes Reinecke --- * v6 - Fixed bit width and endianness. * v5 - removed macro definitions that rename function names. * v3 - Cleaned up unused functions. * v2 - driver supports x86-64 arch, so removed cpu_to_XX API to maintain consistency. drivers/scsi/snic/cq_desc.h | 77 ++++ drivers/scsi/snic/cq_enet_desc.h | 38 ++ drivers/scsi/snic/vnic_cq.c | 86 +++++ drivers/scsi/snic/vnic_cq.h | 110 ++++++ drivers/scsi/snic/vnic_cq_fw.h | 62 ++++ drivers/scsi/snic/vnic_dev.c | 748 ++++++++++++++++++++++++++++++++++++++ drivers/scsi/snic/vnic_dev.h | 110 ++++++ drivers/scsi/snic/vnic_devcmd.h | 270 ++++++++++++++ drivers/scsi/snic/vnic_intr.c | 59 +++ drivers/scsi/snic/vnic_intr.h | 105 ++++++ drivers/scsi/snic/vnic_resource.h | 68 ++++ drivers/scsi/snic/vnic_snic.h | 54 +++ drivers/scsi/snic/vnic_stats.h | 68 ++++ drivers/scsi/snic/vnic_wq.c | 237 ++++++++++++ drivers/scsi/snic/vnic_wq.h | 170 +++++++++ drivers/scsi/snic/wq_enet_desc.h | 96 +++++ 16 files changed, 2358 insertions(+) create mode 100644 drivers/scsi/snic/cq_desc.h create mode 100644 drivers/scsi/snic/cq_enet_desc.h create mode 100644 drivers/scsi/snic/vnic_cq.c create mode 100644 drivers/scsi/snic/vnic_cq.h create mode 100644 drivers/scsi/snic/vnic_cq_fw.h create mode 100644 drivers/scsi/snic/vnic_dev.c create mode 100644 drivers/scsi/snic/vnic_dev.h create mode 100644 drivers/scsi/snic/vnic_devcmd.h create mode 100644 drivers/scsi/snic/vnic_intr.c create mode 100644 drivers/scsi/snic/vnic_intr.h create mode 100644 drivers/scsi/snic/vnic_resource.h create mode 100644 drivers/scsi/snic/vnic_snic.h create mode 100644 drivers/scsi/snic/vnic_stats.h create mode 100644 drivers/scsi/snic/vnic_wq.c create mode 100644 drivers/scsi/snic/vnic_wq.h create mode 100644 drivers/scsi/snic/wq_enet_desc.h diff --git a/drivers/scsi/snic/cq_desc.h b/drivers/scsi/snic/cq_desc.h new file mode 100644 index 0000000..a529056 --- /dev/null +++ b/drivers/scsi/snic/cq_desc.h @@ -0,0 +1,77 @@ +/* + * Copyright 2014 Cisco 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 _CQ_DESC_H_ +#define _CQ_DESC_H_ + +/* + * Completion queue descriptor types + */ +enum cq_desc_types { + CQ_DESC_TYPE_WQ_ENET = 0, + CQ_DESC_TYPE_DESC_COPY = 1, + CQ_DESC_TYPE_WQ_EXCH = 2, + CQ_DESC_TYPE_RQ_ENET = 3, + CQ_DESC_TYPE_RQ_FCP = 4, +}; + +/* Completion queue descriptor: 16B + * + * All completion queues have this basic layout. The + * type_specific area is unique for each completion + * queue type. + */ +struct cq_desc { + __le16 completed_index; + __le16 q_number; + u8 type_specific[11]; + u8 type_color; +}; + +#define CQ_DESC_TYPE_BITS 4 +#define CQ_DESC_TYPE_MASK ((1 << CQ_DESC_TYPE_BITS) - 1) +#define CQ_DESC_COLOR_MASK 1 +#define CQ_DESC_COLOR_SHIFT 7 +#define CQ_DESC_Q_NUM_BITS 10 +#define CQ_DESC_Q_NUM_MASK ((1 << CQ_DESC_Q_NUM_BITS) - 1) +#define CQ_DESC_COMP_NDX_BITS 12 +#define CQ_DESC_COMP_NDX_MASK ((1 << CQ_DESC_COMP_NDX_BITS) - 1) + +static inline void cq_desc_dec(const struct cq_desc *desc_arg, + u8 *type, u8 *color, u16 *q_number, u16 *completed_index) +{ + const struct cq_desc *desc = desc_arg; + const u8 type_color = desc->type_color; + + *color = (type_color >> CQ_DESC_COLOR_SHIFT) & CQ_DESC_COLOR_MASK; + + /* + * Make sure color bit is read from desc *before* other fields + * are read from desc. Hardware guarantees color bit is last + * bit (byte) written. Adding the rmb() prevents the compiler + * and/or CPU from reordering the reads which would potentially + * result in reading stale values. + */ + rmb(); + + *type = type_color & CQ_DESC_TYPE_MASK; + *q_number = le16_to_cpu(desc->q_number) & CQ_DESC_Q_NUM_MASK; + *completed_index = le16_to_cpu(desc->completed_index) & + CQ_DESC_COMP_NDX_MASK; +} + +#endif /* _CQ_DESC_H_ */ diff --git a/drivers/scsi/snic/cq_enet_desc.h b/drivers/scsi/snic/cq_enet_desc.h new file mode 100644 index 0000000..0a1be2e --- /dev/null +++ b/drivers/scsi/snic/cq_enet_desc.h @@ -0,0 +1,38 @@ +/* + * Copyright 2014 Cisco 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 _CQ_ENET_DESC_H_ +#define _CQ_ENET_DESC_H_ + +#include "cq_desc.h" + +/* Ethernet completion queue descriptor: 16B */ +struct cq_enet_wq_desc { + __le16 completed_index; + __le16 q_number; + u8 reserved[11]; + u8 type_color; +}; + +static inline void cq_enet_wq_desc_dec(struct cq_enet_wq_desc *desc, + u8 *type, u8 *color, u16 *q_number, u16 *completed_index) +{ + cq_desc_dec((struct cq_desc *)desc, type, + color, q_number, completed_index); +} + +#endif /* _CQ_ENET_DESC_H_ */ diff --git a/drivers/scsi/snic/vnic_cq.c b/drivers/scsi/snic/vnic_cq.c new file mode 100644 index 0000000..4c8e64e --- /dev/null +++ b/drivers/scsi/snic/vnic_cq.c @@ -0,0 +1,86 @@ +/* + * Copyright 2014 Cisco 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. + */ + +#include +#include +#include +#include "vnic_dev.h" +#include "vnic_cq.h" + +void svnic_cq_free(struct vnic_cq *cq) +{ + svnic_dev_free_desc_ring(cq->vdev, &cq->ring); + + cq->ctrl = NULL; +} + +int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, + unsigned int index, unsigned int desc_count, unsigned int desc_size) +{ + int err; + + cq->index = index; + cq->vdev = vdev; + + cq->ctrl = svnic_dev_get_res(vdev, RES_TYPE_CQ, index); + if (!cq->ctrl) { + pr_err("Failed to hook CQ[%d] resource\n", index); + + return -EINVAL; + } + + err = svnic_dev_alloc_desc_ring(vdev, &cq->ring, desc_count, desc_size); + if (err) + return err; + + return 0; +} + +void svnic_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 cq_message_enable, + unsigned int interrupt_offset, u64 cq_message_addr) +{ + u64 paddr; + + paddr = (u64)cq->ring.base_addr | VNIC_PADDR_TARGET; + writeq(paddr, &cq->ctrl->ring_base); + iowrite32(cq->ring.desc_count, &cq->ctrl->ring_size); + iowrite32(flow_control_enable, &cq->ctrl->flow_control_enable); + iowrite32(color_enable, &cq->ctrl->color_enable); + iowrite32(cq_head, &cq->ctrl->cq_head); + iowrite32(cq_tail, &cq->ctrl->cq_tail); + iowrite32(cq_tail_color, &cq->ctrl->cq_tail_color); + iowrite32(interrupt_enable, &cq->ctrl->interrupt_enable); + iowrite32(cq_entry_enable, &cq->ctrl->cq_entry_enable); + iowrite32(cq_message_enable, &cq->ctrl->cq_message_enable); + iowrite32(interrupt_offset, &cq->ctrl->interrupt_offset); + writeq(cq_message_addr, &cq->ctrl->cq_message_addr); +} + +void svnic_cq_clean(struct vnic_cq *cq) +{ + cq->to_clean = 0; + cq->last_color = 0; + + iowrite32(0, &cq->ctrl->cq_head); + iowrite32(0, &cq->ctrl->cq_tail); + iowrite32(1, &cq->ctrl->cq_tail_color); + + svnic_dev_clear_desc_ring(&cq->ring); +} diff --git a/drivers/scsi/snic/vnic_cq.h b/drivers/scsi/snic/vnic_cq.h new file mode 100644 index 0000000..6e651c3 --- /dev/null +++ b/drivers/scsi/snic/vnic_cq.h @@ -0,0 +1,110 @@ +/* + * Copyright 2014 Cisco 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" + +/* 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 svnic_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 svnic_cq_free(struct vnic_cq *cq); +int svnic_cq_alloc(struct vnic_dev *vdev, struct vnic_cq *cq, + unsigned int index, unsigned int desc_count, unsigned int desc_size); +void svnic_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 svnic_cq_clean(struct vnic_cq *cq); +#endif /* _VNIC_CQ_H_ */ diff --git a/drivers/scsi/snic/vnic_cq_fw.h b/drivers/scsi/snic/vnic_cq_fw.h new file mode 100644 index 0000000..c2d1bbd --- /dev/null +++ b/drivers/scsi/snic/vnic_cq_fw.h @@ -0,0 +1,62 @@ +/* + * Copyright 2014 Cisco 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_FW_H_ +#define _VNIC_CQ_FW_H_ + +#include "snic_fwint.h" + +static inline unsigned int +vnic_cq_fw_service(struct vnic_cq *cq, + int (*q_service)(struct vnic_dev *vdev, + unsigned int index, + struct snic_fw_req *desc), + unsigned int work_to_do) + +{ + struct snic_fw_req *desc; + unsigned int work_done = 0; + u8 color; + + desc = (struct snic_fw_req *)((u8 *)cq->ring.descs + + cq->ring.desc_size * cq->to_clean); + snic_color_dec(desc, &color); + + while (color != cq->last_color) { + + if ((*q_service)(cq->vdev, cq->index, desc)) + break; + + cq->to_clean++; + if (cq->to_clean == cq->ring.desc_count) { + cq->to_clean = 0; + cq->last_color = cq->last_color ? 0 : 1; + } + + desc = (struct snic_fw_req *)((u8 *)cq->ring.descs + + cq->ring.desc_size * cq->to_clean); + snic_color_dec(desc, &color); + + work_done++; + if (work_done >= work_to_do) + break; + } + + return work_done; +} + +#endif /* _VNIC_CQ_FW_H_ */ diff --git a/drivers/scsi/snic/vnic_dev.c b/drivers/scsi/snic/vnic_dev.c new file mode 100644 index 0000000..e0b5549 --- /dev/null +++ b/drivers/scsi/snic/vnic_dev.c @@ -0,0 +1,748 @@ +/* + * Copyright 2014 Cisco 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include "vnic_resource.h" +#include "vnic_devcmd.h" +#include "vnic_dev.h" +#include "vnic_stats.h" +#include "vnic_wq.h" + +#define VNIC_DVCMD_TMO 10000 /* Devcmd Timeout value */ +#define VNIC_NOTIFY_INTR_MASK 0x0000ffff00000000ULL + +struct devcmd2_controller { + struct vnic_wq_ctrl __iomem *wq_ctrl; + struct vnic_dev_ring results_ring; + struct vnic_wq wq; + struct vnic_devcmd2 *cmd_ring; + struct devcmd2_result *result; + u16 next_result; + u16 result_size; + int color; +}; + +struct vnic_res { + void __iomem *vaddr; + unsigned int count; +}; + +struct vnic_dev { + void *priv; + struct pci_dev *pdev; + struct vnic_res res[RES_TYPE_MAX]; + enum vnic_dev_intr_mode intr_mode; + struct vnic_devcmd __iomem *devcmd; + struct vnic_devcmd_notify *notify; + struct vnic_devcmd_notify notify_copy; + dma_addr_t notify_pa; + u32 *linkstatus; + dma_addr_t linkstatus_pa; + struct vnic_stats *stats; + dma_addr_t stats_pa; + struct vnic_devcmd_fw_info *fw_info; + dma_addr_t fw_info_pa; + u64 args[VNIC_DEVCMD_NARGS]; + struct devcmd2_controller *devcmd2; + + int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, + int wait); +}; + +#define VNIC_MAX_RES_HDR_SIZE \ + (sizeof(struct vnic_resource_header) + \ + sizeof(struct vnic_resource) * RES_TYPE_MAX) +#define VNIC_RES_STRIDE 128 + +void *svnic_dev_priv(struct vnic_dev *vdev) +{ + return vdev->priv; +} + +static int vnic_dev_discover_res(struct vnic_dev *vdev, + struct vnic_dev_bar *bar, unsigned int num_bars) +{ + struct vnic_resource_header __iomem *rh; + struct vnic_resource __iomem *r; + u8 type; + + if (num_bars == 0) + return -EINVAL; + + if (bar->len < VNIC_MAX_RES_HDR_SIZE) { + pr_err("vNIC BAR0 res hdr length error\n"); + + return -EINVAL; + } + + rh = bar->vaddr; + if (!rh) { + pr_err("vNIC BAR0 res hdr not mem-mapped\n"); + + return -EINVAL; + } + + if (ioread32(&rh->magic) != VNIC_RES_MAGIC || + ioread32(&rh->version) != VNIC_RES_VERSION) { + pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n", + VNIC_RES_MAGIC, VNIC_RES_VERSION, + ioread32(&rh->magic), ioread32(&rh->version)); + + return -EINVAL; + } + + r = (struct vnic_resource __iomem *)(rh + 1); + + while ((type = ioread8(&r->type)) != RES_TYPE_EOL) { + + u8 bar_num = ioread8(&r->bar); + u32 bar_offset = ioread32(&r->bar_offset); + u32 count = ioread32(&r->count); + u32 len; + + r++; + + if (bar_num >= num_bars) + continue; + + if (!bar[bar_num].len || !bar[bar_num].vaddr) + continue; + + switch (type) { + case RES_TYPE_WQ: + case RES_TYPE_RQ: + case RES_TYPE_CQ: + case RES_TYPE_INTR_CTRL: + /* each count is stride bytes long */ + len = count * VNIC_RES_STRIDE; + if (len + bar_offset > bar->len) { + pr_err("vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n", + type, bar_offset, + len, + bar->len); + + return -EINVAL; + } + break; + + case RES_TYPE_INTR_PBA_LEGACY: + case RES_TYPE_DEVCMD: + case RES_TYPE_DEVCMD2: + len = count; + break; + + default: + continue; + } + + vdev->res[type].count = count; + vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset; + } + + return 0; +} + +unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev, + enum vnic_res_type type) +{ + return vdev->res[type].count; +} + +void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, + unsigned int index) +{ + if (!vdev->res[type].vaddr) + return NULL; + + switch (type) { + case RES_TYPE_WQ: + case RES_TYPE_RQ: + case RES_TYPE_CQ: + case RES_TYPE_INTR_CTRL: + return (char __iomem *)vdev->res[type].vaddr + + index * VNIC_RES_STRIDE; + + default: + return (char __iomem *)vdev->res[type].vaddr; + } +} + +unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring, + unsigned int desc_count, + unsigned int desc_size) +{ + /* The base address of the desc rings must be 512 byte aligned. + * Descriptor count is aligned to groups of 32 descriptors. A + * count of 0 means the maximum 4096 descriptors. Descriptor + * size is aligned to 16 bytes. + */ + + unsigned int count_align = 32; + unsigned int desc_align = 16; + + ring->base_align = 512; + + if (desc_count == 0) + desc_count = 4096; + + ring->desc_count = ALIGN(desc_count, count_align); + + ring->desc_size = ALIGN(desc_size, desc_align); + + ring->size = ring->desc_count * ring->desc_size; + ring->size_unaligned = ring->size + ring->base_align; + + return ring->size_unaligned; +} + +void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) +{ + memset(ring->descs, 0, ring->size); +} + +int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, + unsigned int desc_count, unsigned int desc_size) +{ + svnic_dev_desc_ring_size(ring, desc_count, desc_size); + + ring->descs_unaligned = pci_alloc_consistent(vdev->pdev, + ring->size_unaligned, + &ring->base_addr_unaligned); + + if (!ring->descs_unaligned) { + pr_err("Failed to allocate ring (size=%d), aborting\n", + (int)ring->size); + + return -ENOMEM; + } + + ring->base_addr = ALIGN(ring->base_addr_unaligned, + ring->base_align); + ring->descs = (u8 *)ring->descs_unaligned + + (ring->base_addr - ring->base_addr_unaligned); + + svnic_dev_clear_desc_ring(ring); + + ring->desc_avail = ring->desc_count - 1; + + return 0; +} + +void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) +{ + if (ring->descs) { + pci_free_consistent(vdev->pdev, + ring->size_unaligned, + ring->descs_unaligned, + ring->base_addr_unaligned); + ring->descs = NULL; + } +} + +static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, + int wait) +{ + struct devcmd2_controller *dc2c = vdev->devcmd2; + struct devcmd2_result *result = dc2c->result + dc2c->next_result; + unsigned int i; + int delay; + int err; + u32 posted; + u32 new_posted; + + posted = ioread32(&dc2c->wq_ctrl->posted_index); + + if (posted == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: return error */ + return -ENODEV; + } + + new_posted = (posted + 1) % DEVCMD2_RING_SIZE; + dc2c->cmd_ring[posted].cmd = cmd; + dc2c->cmd_ring[posted].flags = 0; + + if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) + dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT; + + if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { + for (i = 0; i < VNIC_DEVCMD_NARGS; i++) + dc2c->cmd_ring[posted].args[i] = vdev->args[i]; + } + /* Adding write memory barrier prevents compiler and/or CPU + * reordering, thus avoiding descriptor posting before + * descriptor is initialized. Otherwise, hardware can read + * stale descriptor fields. + */ + wmb(); + iowrite32(new_posted, &dc2c->wq_ctrl->posted_index); + + if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT) + return 0; + + for (delay = 0; delay < wait; delay++) { + udelay(100); + if (result->color == dc2c->color) { + dc2c->next_result++; + if (dc2c->next_result == dc2c->result_size) { + dc2c->next_result = 0; + dc2c->color = dc2c->color ? 0 : 1; + } + if (result->error) { + err = (int) result->error; + if (err != ERR_ECMDUNKNOWN || + cmd != CMD_CAPABILITY) + pr_err("Error %d devcmd %d\n", + err, _CMD_N(cmd)); + + return err; + } + if (_CMD_DIR(cmd) & _CMD_DIR_READ) { + /* + * Adding the rmb() prevents the compiler + * and/or CPU from reordering the reads which + * would potentially result in reading stale + * values. + */ + rmb(); + for (i = 0; i < VNIC_DEVCMD_NARGS; i++) + vdev->args[i] = result->results[i]; + } + + return 0; + } + } + + pr_err("Timed out devcmd %d\n", _CMD_N(cmd)); + + return -ETIMEDOUT; +} + +static int svnic_dev_init_devcmd2(struct vnic_dev *vdev) +{ + struct devcmd2_controller *dc2c = NULL; + unsigned int fetch_idx; + int ret; + void __iomem *p; + + if (vdev->devcmd2) + return 0; + + p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); + if (!p) + return -ENODEV; + + dc2c = kzalloc(sizeof(*dc2c), GFP_ATOMIC); + if (!dc2c) + return -ENOMEM; + + vdev->devcmd2 = dc2c; + + dc2c->color = 1; + dc2c->result_size = DEVCMD2_RING_SIZE; + + ret = vnic_wq_devcmd2_alloc(vdev, + &dc2c->wq, + DEVCMD2_RING_SIZE, + DEVCMD2_DESC_SIZE); + if (ret) + goto err_free_devcmd2; + + fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index); + if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ + /* Hardware surprise removal: reset fetch_index */ + fetch_idx = 0; + } + + /* + * Don't change fetch_index ever and + * set posted_index same as fetch_index + * when setting up the WQ for devcmd2. + */ + vnic_wq_init_start(&dc2c->wq, 0, fetch_idx, fetch_idx, 0, 0); + svnic_wq_enable(&dc2c->wq); + ret = svnic_dev_alloc_desc_ring(vdev, + &dc2c->results_ring, + DEVCMD2_RING_SIZE, + DEVCMD2_DESC_SIZE); + if (ret) + goto err_free_wq; + + dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs; + dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs; + dc2c->wq_ctrl = dc2c->wq.ctrl; + vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET; + vdev->args[1] = DEVCMD2_RING_SIZE; + + ret = _svnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO); + if (ret < 0) + goto err_free_desc_ring; + + vdev->devcmd_rtn = &_svnic_dev_cmd2; + pr_info("DEVCMD2 Initialized.\n"); + + return ret; + +err_free_desc_ring: + svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); + +err_free_wq: + svnic_wq_disable(&dc2c->wq); + svnic_wq_free(&dc2c->wq); + +err_free_devcmd2: + kfree(dc2c); + vdev->devcmd2 = NULL; + + return ret; +} /* end of svnic_dev_init_devcmd2 */ + +static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev) +{ + struct devcmd2_controller *dc2c = vdev->devcmd2; + + vdev->devcmd2 = NULL; + vdev->devcmd_rtn = NULL; + + svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); + svnic_wq_disable(&dc2c->wq); + svnic_wq_free(&dc2c->wq); + kfree(dc2c); +} + +int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, + u64 *a0, u64 *a1, int wait) +{ + int err; + + memset(vdev->args, 0, sizeof(vdev->args)); + vdev->args[0] = *a0; + vdev->args[1] = *a1; + + err = (*vdev->devcmd_rtn)(vdev, cmd, wait); + + *a0 = vdev->args[0]; + *a1 = vdev->args[1]; + + return err; +} + +int svnic_dev_fw_info(struct vnic_dev *vdev, + struct vnic_devcmd_fw_info **fw_info) +{ + u64 a0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + int err = 0; + + if (!vdev->fw_info) { + vdev->fw_info = pci_alloc_consistent(vdev->pdev, + sizeof(struct vnic_devcmd_fw_info), + &vdev->fw_info_pa); + if (!vdev->fw_info) + return -ENOMEM; + + a0 = vdev->fw_info_pa; + + /* only get fw_info once and cache it */ + err = svnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait); + } + + *fw_info = vdev->fw_info; + + return err; +} + +int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, + unsigned int size, void *value) +{ + u64 a0, a1; + int wait = VNIC_DVCMD_TMO; + int err; + + a0 = offset; + a1 = size; + + err = svnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); + + switch (size) { + case 1: + *(u8 *)value = (u8)a0; + break; + case 2: + *(u16 *)value = (u16)a0; + break; + case 4: + *(u32 *)value = (u32)a0; + break; + case 8: + *(u64 *)value = a0; + break; + default: + BUG(); + break; + } + + return err; +} + +int svnic_dev_stats_clear(struct vnic_dev *vdev) +{ + u64 a0 = 0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + + return svnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait); +} + +int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) +{ + u64 a0, a1; + int wait = VNIC_DVCMD_TMO; + + if (!vdev->stats) { + vdev->stats = pci_alloc_consistent(vdev->pdev, + sizeof(struct vnic_stats), &vdev->stats_pa); + if (!vdev->stats) + return -ENOMEM; + } + + *stats = vdev->stats; + a0 = vdev->stats_pa; + a1 = sizeof(struct vnic_stats); + + return svnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); +} + +int svnic_dev_close(struct vnic_dev *vdev) +{ + u64 a0 = 0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + + return svnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); +} + +int svnic_dev_enable_wait(struct vnic_dev *vdev) +{ + u64 a0 = 0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + int err = 0; + + err = svnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait); + if (err == ERR_ECMDUNKNOWN) + return svnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); + + return err; +} + +int svnic_dev_disable(struct vnic_dev *vdev) +{ + u64 a0 = 0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + + return svnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); +} + +int svnic_dev_open(struct vnic_dev *vdev, int arg) +{ + u64 a0 = (u32)arg, a1 = 0; + int wait = VNIC_DVCMD_TMO; + + return svnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); +} + +int svnic_dev_open_done(struct vnic_dev *vdev, int *done) +{ + u64 a0 = 0, a1 = 0; + int wait = VNIC_DVCMD_TMO; + int err; + + *done = 0; + + err = svnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); + if (err) + return err; + + *done = (a0 == 0); + + return 0; +} + +int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) +{ + u64 a0, a1; + int wait = VNIC_DVCMD_TMO; + + if (!vdev->notify) { + vdev->notify = pci_alloc_consistent(vdev->pdev, + sizeof(struct vnic_devcmd_notify), + &vdev->notify_pa); + if (!vdev->notify) + return -ENOMEM; + } + + a0 = vdev->notify_pa; + a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK; + a1 += sizeof(struct vnic_devcmd_notify); + + return svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); +} + +void svnic_dev_notify_unset(struct vnic_dev *vdev) +{ + u64 a0, a1; + int wait = VNIC_DVCMD_TMO; + + a0 = 0; /* paddr = 0 to unset notify buffer */ + a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */ + a1 += sizeof(struct vnic_devcmd_notify); + + svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); +} + +static int vnic_dev_notify_ready(struct vnic_dev *vdev) +{ + u32 *words; + unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4; + unsigned int i; + u32 csum; + + if (!vdev->notify) + return 0; + + do { + csum = 0; + memcpy(&vdev->notify_copy, vdev->notify, + sizeof(struct vnic_devcmd_notify)); + words = (u32 *)&vdev->notify_copy; + for (i = 1; i < nwords; i++) + csum += words[i]; + } while (csum != words[0]); + + return 1; +} + +int svnic_dev_init(struct vnic_dev *vdev, int arg) +{ + u64 a0 = (u32)arg, a1 = 0; + int wait = VNIC_DVCMD_TMO; + + return svnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); +} + +int svnic_dev_link_status(struct vnic_dev *vdev) +{ + if (vdev->linkstatus) + return *vdev->linkstatus; + + if (!vnic_dev_notify_ready(vdev)) + return 0; + + return vdev->notify_copy.link_state; +} + +u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev) +{ + if (!vnic_dev_notify_ready(vdev)) + return 0; + + return vdev->notify_copy.link_down_cnt; +} + +void svnic_dev_set_intr_mode(struct vnic_dev *vdev, + enum vnic_dev_intr_mode intr_mode) +{ + vdev->intr_mode = intr_mode; +} + +enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev) +{ + return vdev->intr_mode; +} + +void svnic_dev_unregister(struct vnic_dev *vdev) +{ + if (vdev) { + if (vdev->notify) + pci_free_consistent(vdev->pdev, + sizeof(struct vnic_devcmd_notify), + vdev->notify, + vdev->notify_pa); + if (vdev->linkstatus) + pci_free_consistent(vdev->pdev, + sizeof(u32), + vdev->linkstatus, + vdev->linkstatus_pa); + if (vdev->stats) + pci_free_consistent(vdev->pdev, + sizeof(struct vnic_stats), + vdev->stats, vdev->stats_pa); + if (vdev->fw_info) + pci_free_consistent(vdev->pdev, + sizeof(struct vnic_devcmd_fw_info), + vdev->fw_info, vdev->fw_info_pa); + if (vdev->devcmd2) + vnic_dev_deinit_devcmd2(vdev); + kfree(vdev); + } +} + +struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev, + void *priv, + struct pci_dev *pdev, + struct vnic_dev_bar *bar, + unsigned int num_bars) +{ + if (!vdev) { + vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC); + if (!vdev) + return NULL; + } + + vdev->priv = priv; + vdev->pdev = pdev; + + if (vnic_dev_discover_res(vdev, bar, num_bars)) + goto err_out; + + return vdev; + +err_out: + svnic_dev_unregister(vdev); + + return NULL; +} /* end of svnic_dev_alloc_discover */ + +/* + * fallback option is left to keep the interface common for other vnics. + */ +int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback) +{ + int err = -ENODEV; + void __iomem *p; + + p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); + if (p) + err = svnic_dev_init_devcmd2(vdev); + else + pr_err("DEVCMD2 resource not found.\n"); + + return err; +} /* end of svnic_dev_cmd_init */ diff --git a/drivers/scsi/snic/vnic_dev.h b/drivers/scsi/snic/vnic_dev.h new file mode 100644 index 0000000..e65726d --- /dev/null +++ b/drivers/scsi/snic/vnic_dev.h @@ -0,0 +1,110 @@ +/* + * Copyright 2014 Cisco 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_DEV_H_ +#define _VNIC_DEV_H_ + +#include "vnic_resource.h" +#include "vnic_devcmd.h" + +#ifndef VNIC_PADDR_TARGET +#define VNIC_PADDR_TARGET 0x0000000000000000ULL +#endif + +#ifndef readq +static inline u64 readq(void __iomem *reg) +{ + return ((u64)readl(reg + 0x4UL) << 32) | (u64)readl(reg); +} + +static inline void writeq(u64 val, void __iomem *reg) +{ + writel(lower_32_bits(val), reg); + writel(upper_32_bits(val), reg + 0x4UL); +} +#endif + +enum vnic_dev_intr_mode { + VNIC_DEV_INTR_MODE_UNKNOWN, + VNIC_DEV_INTR_MODE_INTX, + VNIC_DEV_INTR_MODE_MSI, + VNIC_DEV_INTR_MODE_MSIX, +}; + +struct vnic_dev_bar { + void __iomem *vaddr; + dma_addr_t bus_addr; + unsigned long len; +}; + +struct vnic_dev_ring { + void *descs; + size_t size; + dma_addr_t base_addr; + size_t base_align; + void *descs_unaligned; + size_t size_unaligned; + dma_addr_t base_addr_unaligned; + unsigned int desc_size; + unsigned int desc_count; + unsigned int desc_avail; +}; + +struct vnic_dev; +struct vnic_stats; + +void *svnic_dev_priv(struct vnic_dev *vdev); +unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev, + enum vnic_res_type type); +void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, + unsigned int index); +unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring, + unsigned int desc_count, + unsigned int desc_size); +void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring); +int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, + unsigned int desc_count, unsigned int desc_size); +void svnic_dev_free_desc_ring(struct vnic_dev *vdev, + struct vnic_dev_ring *ring); +int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, + u64 *a0, u64 *a1, int wait); +int svnic_dev_fw_info(struct vnic_dev *vdev, + struct vnic_devcmd_fw_info **fw_info); +int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, + unsigned int size, void *value); +int svnic_dev_stats_clear(struct vnic_dev *vdev); +int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats); +int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr); +void svnic_dev_notify_unset(struct vnic_dev *vdev); +int svnic_dev_link_status(struct vnic_dev *vdev); +u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev); +int svnic_dev_close(struct vnic_dev *vdev); +int svnic_dev_enable_wait(struct vnic_dev *vdev); +int svnic_dev_disable(struct vnic_dev *vdev); +int svnic_dev_open(struct vnic_dev *vdev, int arg); +int svnic_dev_open_done(struct vnic_dev *vdev, int *done); +int svnic_dev_init(struct vnic_dev *vdev, int arg); +struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev, + void *priv, struct pci_dev *pdev, + struct vnic_dev_bar *bar, + unsigned int num_bars); +void svnic_dev_set_intr_mode(struct vnic_dev *vdev, + enum vnic_dev_intr_mode intr_mode); +enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev); +void svnic_dev_unregister(struct vnic_dev *vdev); +int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback); +#endif /* _VNIC_DEV_H_ */ diff --git a/drivers/scsi/snic/vnic_devcmd.h b/drivers/scsi/snic/vnic_devcmd.h new file mode 100644 index 0000000..d81b4f0 --- /dev/null +++ b/drivers/scsi/snic/vnic_devcmd.h @@ -0,0 +1,270 @@ +/* + * Copyright 2014 Cisco 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_DEVCMD_H_ +#define _VNIC_DEVCMD_H_ + +#define _CMD_NBITS 14 +#define _CMD_VTYPEBITS 10 +#define _CMD_FLAGSBITS 6 +#define _CMD_DIRBITS 2 + +#define _CMD_NMASK ((1 << _CMD_NBITS)-1) +#define _CMD_VTYPEMASK ((1 << _CMD_VTYPEBITS)-1) +#define _CMD_FLAGSMASK ((1 << _CMD_FLAGSBITS)-1) +#define _CMD_DIRMASK ((1 << _CMD_DIRBITS)-1) + +#define _CMD_NSHIFT 0 +#define _CMD_VTYPESHIFT (_CMD_NSHIFT+_CMD_NBITS) +#define _CMD_FLAGSSHIFT (_CMD_VTYPESHIFT+_CMD_VTYPEBITS) +#define _CMD_DIRSHIFT (_CMD_FLAGSSHIFT+_CMD_FLAGSBITS) + +/* + * Direction bits (from host perspective). + */ +#define _CMD_DIR_NONE 0U +#define _CMD_DIR_WRITE 1U +#define _CMD_DIR_READ 2U +#define _CMD_DIR_RW (_CMD_DIR_WRITE | _CMD_DIR_READ) + +/* + * Flag bits. + */ +#define _CMD_FLAGS_NONE 0U +#define _CMD_FLAGS_NOWAIT 1U + +/* + * vNIC type bits. + */ +#define _CMD_VTYPE_NONE 0U +#define _CMD_VTYPE_ENET 1U +#define _CMD_VTYPE_FC 2U +#define _CMD_VTYPE_SCSI 4U +#define _CMD_VTYPE_ALL (_CMD_VTYPE_ENET | _CMD_VTYPE_FC | _CMD_VTYPE_SCSI) + +/* + * Used to create cmds.. +*/ +#define _CMDCF(dir, flags, vtype, nr) \ + (((dir) << _CMD_DIRSHIFT) | \ + ((flags) << _CMD_FLAGSSHIFT) | \ + ((vtype) << _CMD_VTYPESHIFT) | \ + ((nr) << _CMD_NSHIFT)) +#define _CMDC(dir, vtype, nr) _CMDCF(dir, 0, vtype, nr) +#define _CMDCNW(dir, vtype, nr) _CMDCF(dir, _CMD_FLAGS_NOWAIT, vtype, nr) + +/* + * Used to decode cmds.. +*/ +#define _CMD_DIR(cmd) (((cmd) >> _CMD_DIRSHIFT) & _CMD_DIRMASK) +#define _CMD_FLAGS(cmd) (((cmd) >> _CMD_FLAGSSHIFT) & _CMD_FLAGSMASK) +#define _CMD_VTYPE(cmd) (((cmd) >> _CMD_VTYPESHIFT) & _CMD_VTYPEMASK) +#define _CMD_N(cmd) (((cmd) >> _CMD_NSHIFT) & _CMD_NMASK) + +enum vnic_devcmd_cmd { + CMD_NONE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_NONE, 0), + + /* mcpu fw info in mem: (u64)a0=paddr to struct vnic_devcmd_fw_info */ + CMD_MCPU_FW_INFO = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 1), + + /* dev-specific block member: + * in: (u16)a0=offset,(u8)a1=size + * out: a0=value */ + CMD_DEV_SPEC = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 2), + + /* stats clear */ + CMD_STATS_CLEAR = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 3), + + /* stats dump in mem: (u64)a0=paddr to stats area, + * (u16)a1=sizeof stats area */ + CMD_STATS_DUMP = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 4), + + /* nic_cfg in (u32)a0 */ + CMD_NIC_CFG = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 16), + + /* set struct vnic_devcmd_notify buffer in mem: + * in: + * (u64)a0=paddr to notify (set paddr=0 to unset) + * (u32)a1 & 0x00000000ffffffff=sizeof(struct vnic_devcmd_notify) + * (u16)a1 & 0x0000ffff00000000=intr num (-1 for no intr) + * out: + * (u32)a1 = effective size + */ + CMD_NOTIFY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 21), + + /* initiate open sequence (u32)a0=flags (see CMD_OPENF_*) */ + CMD_OPEN = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 23), + + /* open status: + * out: a0=0 open complete, a0=1 open in progress */ + CMD_OPEN_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 24), + + /* close vnic */ + CMD_CLOSE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 25), + + /* initialize virtual link: (u32)a0=flags (see CMD_INITF_*) */ + CMD_INIT = _CMDCNW(_CMD_DIR_READ, _CMD_VTYPE_ALL, 26), + + /* enable virtual link */ + CMD_ENABLE = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28), + + /* enable virtual link, waiting variant. */ + CMD_ENABLE_WAIT = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 28), + + /* disable virtual link */ + CMD_DISABLE = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 29), + + /* stats dump all vnics on uplink in mem: (u64)a0=paddr (u32)a1=uif */ + CMD_STATS_DUMP_ALL = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 30), + + /* init status: + * out: a0=0 init complete, a0=1 init in progress + * if a0=0, a1=errno */ + CMD_INIT_STATUS = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 31), + + /* undo initialize of virtual link */ + CMD_DEINIT = _CMDCNW(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 34), + + /* check fw capability of a cmd: + * in: (u32)a0=cmd + * out: (u32)a0=errno, 0:valid cmd, a1=supported VNIC_STF_* bits */ + CMD_CAPABILITY = _CMDC(_CMD_DIR_RW, _CMD_VTYPE_ALL, 36), + + /* + * Initialization for the devcmd2 interface. + * in: (u64) a0=host result buffer physical address + * in: (u16) a1=number of entries in result buffer + */ + CMD_INITIALIZE_DEVCMD2 = _CMDC(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 57) +}; + +/* flags for CMD_OPEN */ +#define CMD_OPENF_OPROM 0x1 /* open coming from option rom */ + +/* flags for CMD_INIT */ +#define CMD_INITF_DEFAULT_MAC 0x1 /* init with default mac addr */ + +/* flags for CMD_PACKET_FILTER */ +#define CMD_PFILTER_DIRECTED 0x01 +#define CMD_PFILTER_MULTICAST 0x02 +#define CMD_PFILTER_BROADCAST 0x04 +#define CMD_PFILTER_PROMISCUOUS 0x08 +#define CMD_PFILTER_ALL_MULTICAST 0x10 + +enum vnic_devcmd_status { + STAT_NONE = 0, + STAT_BUSY = 1 << 0, /* cmd in progress */ + STAT_ERROR = 1 << 1, /* last cmd caused error (code in a0) */ +}; + +enum vnic_devcmd_error { + ERR_SUCCESS = 0, + ERR_EINVAL = 1, + ERR_EFAULT = 2, + ERR_EPERM = 3, + ERR_EBUSY = 4, + ERR_ECMDUNKNOWN = 5, + ERR_EBADSTATE = 6, + ERR_ENOMEM = 7, + ERR_ETIMEDOUT = 8, + ERR_ELINKDOWN = 9, +}; + +struct vnic_devcmd_fw_info { + char fw_version[32]; + char fw_build[32]; + char hw_version[32]; + char hw_serial_number[32]; +}; + +struct vnic_devcmd_notify { + u32 csum; /* checksum over following words */ + + u32 link_state; /* link up == 1 */ + u32 port_speed; /* effective port speed (rate limit) */ + u32 mtu; /* MTU */ + u32 msglvl; /* requested driver msg lvl */ + u32 uif; /* uplink interface */ + u32 status; /* status bits (see VNIC_STF_*) */ + u32 error; /* error code (see ERR_*) for first ERR */ + u32 link_down_cnt; /* running count of link down transitions */ +}; +#define VNIC_STF_FATAL_ERR 0x0001 /* fatal fw error */ + +struct vnic_devcmd_provinfo { + u8 oui[3]; + u8 type; + u8 data[0]; +}; + +/* + * Writing cmd register causes STAT_BUSY to get set in status register. + * When cmd completes, STAT_BUSY will be cleared. + * + * If cmd completed successfully STAT_ERROR will be clear + * and args registers contain cmd-specific results. + * + * If cmd error, STAT_ERROR will be set and args[0] contains error code. + * + * status register is read-only. While STAT_BUSY is set, + * all other register contents are read-only. + */ + +/* Make sizeof(vnic_devcmd) a power-of-2 for I/O BAR. */ +#define VNIC_DEVCMD_NARGS 15 +struct vnic_devcmd { + u32 status; /* RO */ + u32 cmd; /* RW */ + u64 args[VNIC_DEVCMD_NARGS]; /* RW cmd args (little-endian) */ +}; + + +/* + * Version 2 of the interface. + * + * Some things are carried over, notably the vnic_devcmd_cmd enum. + */ + +/* + * Flags for vnic_devcmd2.flags + */ + +#define DEVCMD2_FNORESULT 0x1 /* Don't copy result to host */ + +#define VNIC_DEVCMD2_NARGS VNIC_DEVCMD_NARGS +struct vnic_devcmd2 { + u16 pad; + u16 flags; + u32 cmd; /* same command #defines as original */ + u64 args[VNIC_DEVCMD2_NARGS]; +}; + +#define VNIC_DEVCMD2_NRESULTS VNIC_DEVCMD_NARGS +struct devcmd2_result { + u64 results[VNIC_DEVCMD2_NRESULTS]; + u32 pad; + u16 completed_index; /* into copy WQ */ + u8 error; /* same error codes as original */ + u8 color; /* 0 or 1 as with completion queues */ +}; + +#define DEVCMD2_RING_SIZE 32 +#define DEVCMD2_DESC_SIZE 128 + +#define DEVCMD2_RESULTS_SIZE_MAX ((1 << 16) - 1) + +#endif /* _VNIC_DEVCMD_H_ */ diff --git a/drivers/scsi/snic/vnic_intr.c b/drivers/scsi/snic/vnic_intr.c new file mode 100644 index 0000000..a7d5480 --- /dev/null +++ b/drivers/scsi/snic/vnic_intr.c @@ -0,0 +1,59 @@ +/* + * Copyright 2014 Cisco 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. + */ + +#include +#include +#include +#include +#include +#include "vnic_dev.h" +#include "vnic_intr.h" + +void svnic_intr_free(struct vnic_intr *intr) +{ + intr->ctrl = NULL; +} + +int svnic_intr_alloc(struct vnic_dev *vdev, struct vnic_intr *intr, + unsigned int index) +{ + intr->index = index; + intr->vdev = vdev; + + intr->ctrl = svnic_dev_get_res(vdev, RES_TYPE_INTR_CTRL, index); + if (!intr->ctrl) { + pr_err("Failed to hook INTR[%d].ctrl resource\n", + index); + return -EINVAL; + } + + return 0; +} + +void svnic_intr_init(struct vnic_intr *intr, unsigned int coalescing_timer, + unsigned int coalescing_type, unsigned int mask_on_assertion) +{ + iowrite32(coalescing_timer, &intr->ctrl->coalescing_timer); + iowrite32(coalescing_type, &intr->ctrl->coalescing_type); + iowrite32(mask_on_assertion, &intr->ctrl->mask_on_assertion); + iowrite32(0, &intr->ctrl->int_credits); +} + +void svnic_intr_clean(struct vnic_intr *intr) +{ + iowrite32(0, &intr->ctrl->int_credits); +} diff --git a/drivers/scsi/snic/vnic_intr.h b/drivers/scsi/snic/vnic_intr.h new file mode 100644 index 0000000..4547f60 --- /dev/null +++ b/drivers/scsi/snic/vnic_intr.h @@ -0,0 +1,105 @@ +/* + * Copyright 2014 Cisco 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_INTR_H_ +#define _VNIC_INTR_H_ + +#include +#include "vnic_dev.h" + +#define VNIC_INTR_TIMER_MAX 0xffff + +#define VNIC_INTR_TIMER_TYPE_ABS 0 +#define VNIC_INTR_TIMER_TYPE_QUIET 1 + +/* Interrupt control */ +struct vnic_intr_ctrl { + u32 coalescing_timer; /* 0x00 */ + u32 pad0; + u32 coalescing_value; /* 0x08 */ + u32 pad1; + u32 coalescing_type; /* 0x10 */ + u32 pad2; + u32 mask_on_assertion; /* 0x18 */ + u32 pad3; + u32 mask; /* 0x20 */ + u32 pad4; + u32 int_credits; /* 0x28 */ + u32 pad5; + u32 int_credit_return; /* 0x30 */ + u32 pad6; +}; + +struct vnic_intr { + unsigned int index; + struct vnic_dev *vdev; + struct vnic_intr_ctrl __iomem *ctrl; /* memory-mapped */ +}; + +static inline void +svnic_intr_unmask(struct vnic_intr *intr) +{ + iowrite32(0, &intr->ctrl->mask); +} + +static inline void +svnic_intr_mask(struct vnic_intr *intr) +{ + iowrite32(1, &intr->ctrl->mask); +} + +static inline void +svnic_intr_return_credits(struct vnic_intr *intr, + unsigned int credits, + int unmask, + int reset_timer) +{ +#define VNIC_INTR_UNMASK_SHIFT 16 +#define VNIC_INTR_RESET_TIMER_SHIFT 17 + + u32 int_credit_return = (credits & 0xffff) | + (unmask ? (1 << VNIC_INTR_UNMASK_SHIFT) : 0) | + (reset_timer ? (1 << VNIC_INTR_RESET_TIMER_SHIFT) : 0); + + iowrite32(int_credit_return, &intr->ctrl->int_credit_return); +} + +static inline unsigned int +svnic_intr_credits(struct vnic_intr *intr) +{ + return ioread32(&intr->ctrl->int_credits); +} + +static inline void +svnic_intr_return_all_credits(struct vnic_intr *intr) +{ + unsigned int credits = svnic_intr_credits(intr); + int unmask = 1; + int reset_timer = 1; + + svnic_intr_return_credits(intr, credits, unmask, reset_timer); +} + +void svnic_intr_free(struct vnic_intr *); +int svnic_intr_alloc(struct vnic_dev *, struct vnic_intr *, unsigned int); +void svnic_intr_init(struct vnic_intr *intr, + unsigned int coalescing_timer, + unsigned int coalescing_type, + unsigned int mask_on_assertion); +void svnic_intr_clean(struct vnic_intr *); + +#endif /* _VNIC_INTR_H_ */ diff --git a/drivers/scsi/snic/vnic_resource.h b/drivers/scsi/snic/vnic_resource.h new file mode 100644 index 0000000..9713d68 --- /dev/null +++ b/drivers/scsi/snic/vnic_resource.h @@ -0,0 +1,68 @@ +/* + * Copyright 2014 Cisco 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_RESOURCE_H_ +#define _VNIC_RESOURCE_H_ + +#define VNIC_RES_MAGIC 0x766E6963L /* 'vnic' */ +#define VNIC_RES_VERSION 0x00000000L + +/* vNIC resource types */ +enum vnic_res_type { + RES_TYPE_EOL, /* End-of-list */ + RES_TYPE_WQ, /* Work queues */ + RES_TYPE_RQ, /* Receive queues */ + RES_TYPE_CQ, /* Completion queues */ + RES_TYPE_RSVD1, + RES_TYPE_NIC_CFG, /* Enet NIC config registers */ + RES_TYPE_RSVD2, + RES_TYPE_RSVD3, + RES_TYPE_RSVD4, + RES_TYPE_RSVD5, + RES_TYPE_INTR_CTRL, /* Interrupt ctrl table */ + RES_TYPE_INTR_TABLE, /* MSI/MSI-X Interrupt table */ + RES_TYPE_INTR_PBA, /* MSI/MSI-X PBA table */ + RES_TYPE_INTR_PBA_LEGACY, /* Legacy intr status */ + RES_TYPE_RSVD6, + RES_TYPE_RSVD7, + RES_TYPE_DEVCMD, /* Device command region */ + RES_TYPE_PASS_THRU_PAGE, /* Pass-thru page */ + RES_TYPE_SUBVNIC, /* subvnic resource type */ + RES_TYPE_MQ_WQ, /* MQ Work queues */ + RES_TYPE_MQ_RQ, /* MQ Receive queues */ + RES_TYPE_MQ_CQ, /* MQ Completion queues */ + RES_TYPE_DEPRECATED1, /* Old version of devcmd 2 */ + RES_TYPE_DEPRECATED2, /* Old version of devcmd 2 */ + RES_TYPE_DEVCMD2, /* Device control region */ + + RES_TYPE_MAX, /* Count of resource types */ +}; + +struct vnic_resource_header { + u32 magic; + u32 version; +}; + +struct vnic_resource { + u8 type; + u8 bar; + u8 pad[2]; + u32 bar_offset; + u32 count; +}; + +#endif /* _VNIC_RESOURCE_H_ */ diff --git a/drivers/scsi/snic/vnic_snic.h b/drivers/scsi/snic/vnic_snic.h new file mode 100644 index 0000000..514d39f --- /dev/null +++ b/drivers/scsi/snic/vnic_snic.h @@ -0,0 +1,54 @@ +/* + * Copyright 2014 Cisco 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_SNIC_H_ +#define _VNIC_SNIC_H_ + +#define VNIC_SNIC_WQ_DESCS_MIN 64 +#define VNIC_SNIC_WQ_DESCS_MAX 1024 + +#define VNIC_SNIC_MAXDATAFIELDSIZE_MIN 256 +#define VNIC_SNIC_MAXDATAFIELDSIZE_MAX 2112 + +#define VNIC_SNIC_IO_THROTTLE_COUNT_MIN 1 +#define VNIC_SNIC_IO_THROTTLE_COUNT_MAX 1024 + +#define VNIC_SNIC_PORT_DOWN_TIMEOUT_MIN 0 +#define VNIC_SNIC_PORT_DOWN_TIMEOUT_MAX 240000 + +#define VNIC_SNIC_PORT_DOWN_IO_RETRIES_MIN 0 +#define VNIC_SNIC_PORT_DOWN_IO_RETRIES_MAX 255 + +#define VNIC_SNIC_LUNS_PER_TARGET_MIN 1 +#define VNIC_SNIC_LUNS_PER_TARGET_MAX 1024 + +/* Device-specific region: scsi configuration */ +struct vnic_snic_config { + u32 flags; + u32 wq_enet_desc_count; + u32 io_throttle_count; + u32 port_down_timeout; + u32 port_down_io_retries; + u32 luns_per_tgt; + u16 maxdatafieldsize; + u16 intr_timer; + u8 intr_timer_type; + u8 _resvd2; + u8 xpt_type; + u8 hid; +}; +#endif /* _VNIC_SNIC_H_ */ diff --git a/drivers/scsi/snic/vnic_stats.h b/drivers/scsi/snic/vnic_stats.h new file mode 100644 index 0000000..370a37c --- /dev/null +++ b/drivers/scsi/snic/vnic_stats.h @@ -0,0 +1,68 @@ +/* + * Copyright 2014 Cisco 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_STATS_H_ +#define _VNIC_STATS_H_ + +/* Tx statistics */ +struct vnic_tx_stats { + u64 tx_frames_ok; + u64 tx_unicast_frames_ok; + u64 tx_multicast_frames_ok; + u64 tx_broadcast_frames_ok; + u64 tx_bytes_ok; + u64 tx_unicast_bytes_ok; + u64 tx_multicast_bytes_ok; + u64 tx_broadcast_bytes_ok; + u64 tx_drops; + u64 tx_errors; + u64 tx_tso; + u64 rsvd[16]; +}; + +/* Rx statistics */ +struct vnic_rx_stats { + u64 rx_frames_ok; + u64 rx_frames_total; + u64 rx_unicast_frames_ok; + u64 rx_multicast_frames_ok; + u64 rx_broadcast_frames_ok; + u64 rx_bytes_ok; + u64 rx_unicast_bytes_ok; + u64 rx_multicast_bytes_ok; + u64 rx_broadcast_bytes_ok; + u64 rx_drop; + u64 rx_no_bufs; + u64 rx_errors; + u64 rx_rss; + u64 rx_crc_errors; + u64 rx_frames_64; + u64 rx_frames_127; + u64 rx_frames_255; + u64 rx_frames_511; + u64 rx_frames_1023; + u64 rx_frames_1518; + u64 rx_frames_to_max; + u64 rsvd[16]; +}; + +struct vnic_stats { + struct vnic_tx_stats tx; + struct vnic_rx_stats rx; +}; + +#endif /* _VNIC_STATS_H_ */ diff --git a/drivers/scsi/snic/vnic_wq.c b/drivers/scsi/snic/vnic_wq.c new file mode 100644 index 0000000..1e91d43 --- /dev/null +++ b/drivers/scsi/snic/vnic_wq.c @@ -0,0 +1,237 @@ +/* + * Copyright 2014 Cisco 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. + */ + +#include +#include +#include +#include +#include +#include "vnic_dev.h" +#include "vnic_wq.h" + +static inline int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int index, enum vnic_res_type res_type) +{ + wq->ctrl = svnic_dev_get_res(vdev, res_type, index); + if (!wq->ctrl) + return -EINVAL; + + return 0; +} + +static inline int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int index, unsigned int desc_count, unsigned int desc_size) +{ + return svnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count, + desc_size); +} + +static int vnic_wq_alloc_bufs(struct vnic_wq *wq) +{ + struct vnic_wq_buf *buf; + unsigned int i, j, count = wq->ring.desc_count; + unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count); + + for (i = 0; i < blks; i++) { + wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC); + if (!wq->bufs[i]) { + pr_err("Failed to alloc wq_bufs\n"); + + return -ENOMEM; + } + } + + for (i = 0; i < blks; i++) { + buf = wq->bufs[i]; + for (j = 0; j < VNIC_WQ_BUF_DFLT_BLK_ENTRIES; j++) { + buf->index = i * VNIC_WQ_BUF_DFLT_BLK_ENTRIES + j; + buf->desc = (u8 *)wq->ring.descs + + wq->ring.desc_size * buf->index; + if (buf->index + 1 == count) { + buf->next = wq->bufs[0]; + break; + } else if (j + 1 == VNIC_WQ_BUF_DFLT_BLK_ENTRIES) { + buf->next = wq->bufs[i + 1]; + } else { + buf->next = buf + 1; + buf++; + } + } + } + + wq->to_use = wq->to_clean = wq->bufs[0]; + + return 0; +} + +void svnic_wq_free(struct vnic_wq *wq) +{ + struct vnic_dev *vdev; + unsigned int i; + + vdev = wq->vdev; + + svnic_dev_free_desc_ring(vdev, &wq->ring); + + for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) { + kfree(wq->bufs[i]); + wq->bufs[i] = NULL; + } + + wq->ctrl = NULL; + +} + +int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int desc_count, unsigned int desc_size) +{ + int err; + + wq->index = 0; + wq->vdev = vdev; + + err = vnic_wq_get_ctrl(vdev, wq, 0, RES_TYPE_DEVCMD2); + if (err) { + pr_err("Failed to get devcmd2 resource\n"); + + return err; + } + + svnic_wq_disable(wq); + + err = vnic_wq_alloc_ring(vdev, wq, 0, desc_count, desc_size); + if (err) + return err; + + return 0; +} + +int svnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int index, unsigned int desc_count, unsigned int desc_size) +{ + int err; + + wq->index = index; + wq->vdev = vdev; + + err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ); + if (err) { + pr_err("Failed to hook WQ[%d] resource\n", index); + + return err; + } + + svnic_wq_disable(wq); + + err = vnic_wq_alloc_ring(vdev, wq, index, desc_count, desc_size); + if (err) + return err; + + err = vnic_wq_alloc_bufs(wq); + if (err) { + svnic_wq_free(wq); + + return err; + } + + return 0; +} + +void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, + unsigned int fetch_index, unsigned int posted_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset) +{ + u64 paddr; + unsigned int count = wq->ring.desc_count; + + paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET; + writeq(paddr, &wq->ctrl->ring_base); + iowrite32(count, &wq->ctrl->ring_size); + iowrite32(fetch_index, &wq->ctrl->fetch_index); + iowrite32(posted_index, &wq->ctrl->posted_index); + iowrite32(cq_index, &wq->ctrl->cq_index); + iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable); + iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset); + iowrite32(0, &wq->ctrl->error_status); + + wq->to_use = wq->to_clean = + &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)] + [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)]; +} + +void svnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset) +{ + vnic_wq_init_start(wq, cq_index, 0, 0, error_interrupt_enable, + error_interrupt_offset); +} + +unsigned int svnic_wq_error_status(struct vnic_wq *wq) +{ + return ioread32(&wq->ctrl->error_status); +} + +void svnic_wq_enable(struct vnic_wq *wq) +{ + iowrite32(1, &wq->ctrl->enable); +} + +int svnic_wq_disable(struct vnic_wq *wq) +{ + unsigned int wait; + + iowrite32(0, &wq->ctrl->enable); + + /* Wait for HW to ACK disable request */ + for (wait = 0; wait < 100; wait++) { + if (!(ioread32(&wq->ctrl->running))) + return 0; + udelay(1); + } + + pr_err("Failed to disable WQ[%d]\n", wq->index); + + return -ETIMEDOUT; +} + +void svnic_wq_clean(struct vnic_wq *wq, + void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)) +{ + struct vnic_wq_buf *buf; + + BUG_ON(ioread32(&wq->ctrl->enable)); + + buf = wq->to_clean; + + while (svnic_wq_desc_used(wq) > 0) { + + (*buf_clean)(wq, buf); + + buf = wq->to_clean = buf->next; + wq->ring.desc_avail++; + } + + wq->to_use = wq->to_clean = wq->bufs[0]; + + iowrite32(0, &wq->ctrl->fetch_index); + iowrite32(0, &wq->ctrl->posted_index); + iowrite32(0, &wq->ctrl->error_status); + + svnic_dev_clear_desc_ring(&wq->ring); +} diff --git a/drivers/scsi/snic/vnic_wq.h b/drivers/scsi/snic/vnic_wq.h new file mode 100644 index 0000000..7cc031c --- /dev/null +++ b/drivers/scsi/snic/vnic_wq.h @@ -0,0 +1,170 @@ +/* + * Copyright 2014 Cisco 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_WQ_H_ +#define _VNIC_WQ_H_ + +#include +#include "vnic_dev.h" +#include "vnic_cq.h" + +/* Work queue control */ +struct vnic_wq_ctrl { + u64 ring_base; /* 0x00 */ + u32 ring_size; /* 0x08 */ + u32 pad0; + u32 posted_index; /* 0x10 */ + u32 pad1; + u32 cq_index; /* 0x18 */ + u32 pad2; + u32 enable; /* 0x20 */ + u32 pad3; + u32 running; /* 0x28 */ + u32 pad4; + u32 fetch_index; /* 0x30 */ + u32 pad5; + u32 dca_value; /* 0x38 */ + u32 pad6; + u32 error_interrupt_enable; /* 0x40 */ + u32 pad7; + u32 error_interrupt_offset; /* 0x48 */ + u32 pad8; + u32 error_status; /* 0x50 */ + u32 pad9; +}; + +struct vnic_wq_buf { + struct vnic_wq_buf *next; + dma_addr_t dma_addr; + void *os_buf; + unsigned int len; + unsigned int index; + int sop; + void *desc; +}; + +/* Break the vnic_wq_buf allocations into blocks of 64 entries */ +#define VNIC_WQ_BUF_MIN_BLK_ENTRIES 32 +#define VNIC_WQ_BUF_DFLT_BLK_ENTRIES 64 +#define VNIC_WQ_BUF_BLK_ENTRIES(entries) \ + ((unsigned int)(entries < VNIC_WQ_BUF_DFLT_BLK_ENTRIES) ? \ + VNIC_WQ_BUF_MIN_BLK_ENTRIES : VNIC_WQ_BUF_DFLT_BLK_ENTRIES) +#define VNIC_WQ_BUF_BLK_SZ \ + (VNIC_WQ_BUF_DFLT_BLK_ENTRIES * sizeof(struct vnic_wq_buf)) +#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ + DIV_ROUND_UP(entries, VNIC_WQ_BUF_DFLT_BLK_ENTRIES) +#define VNIC_WQ_BUF_BLKS_NEEDED(entries) \ + DIV_ROUND_UP(entries, VNIC_WQ_BUF_DFLT_BLK_ENTRIES) +#define VNIC_WQ_BUF_BLKS_MAX VNIC_WQ_BUF_BLKS_NEEDED(4096) + +struct vnic_wq { + unsigned int index; + struct vnic_dev *vdev; + struct vnic_wq_ctrl __iomem *ctrl; /* memory-mapped */ + struct vnic_dev_ring ring; + struct vnic_wq_buf *bufs[VNIC_WQ_BUF_BLKS_MAX]; + struct vnic_wq_buf *to_use; + struct vnic_wq_buf *to_clean; + unsigned int pkts_outstanding; +}; + +static inline unsigned int svnic_wq_desc_avail(struct vnic_wq *wq) +{ + /* how many does SW own? */ + return wq->ring.desc_avail; +} + +static inline unsigned int svnic_wq_desc_used(struct vnic_wq *wq) +{ + /* how many does HW own? */ + return wq->ring.desc_count - wq->ring.desc_avail - 1; +} + +static inline void *svnic_wq_next_desc(struct vnic_wq *wq) +{ + return wq->to_use->desc; +} + +static inline void svnic_wq_post(struct vnic_wq *wq, + void *os_buf, dma_addr_t dma_addr, + unsigned int len, int sop, int eop) +{ + struct vnic_wq_buf *buf = wq->to_use; + + buf->sop = sop; + buf->os_buf = eop ? os_buf : NULL; + buf->dma_addr = dma_addr; + buf->len = len; + + buf = buf->next; + if (eop) { + /* Adding write memory barrier prevents compiler and/or CPU + * reordering, thus avoiding descriptor posting before + * descriptor is initialized. Otherwise, hardware can read + * stale descriptor fields. + */ + wmb(); + iowrite32(buf->index, &wq->ctrl->posted_index); + } + wq->to_use = buf; + + wq->ring.desc_avail--; +} + +static inline void svnic_wq_service(struct vnic_wq *wq, + struct cq_desc *cq_desc, u16 completed_index, + void (*buf_service)(struct vnic_wq *wq, + struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque), + void *opaque) +{ + struct vnic_wq_buf *buf; + + buf = wq->to_clean; + while (1) { + + (*buf_service)(wq, cq_desc, buf, opaque); + + wq->ring.desc_avail++; + + wq->to_clean = buf->next; + + if (buf->index == completed_index) + break; + + buf = wq->to_clean; + } +} + +void svnic_wq_free(struct vnic_wq *wq); +int svnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int index, unsigned int desc_count, unsigned int desc_size); +int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq, + unsigned int desc_count, unsigned int desc_size); +void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index, + unsigned int fetch_index, unsigned int post_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset); + +void svnic_wq_init(struct vnic_wq *wq, unsigned int cq_index, + unsigned int error_interrupt_enable, + unsigned int error_interrupt_offset); +unsigned int svnic_wq_error_status(struct vnic_wq *wq); +void svnic_wq_enable(struct vnic_wq *wq); +int svnic_wq_disable(struct vnic_wq *wq); +void svnic_wq_clean(struct vnic_wq *wq, + void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf)); +#endif /* _VNIC_WQ_H_ */ diff --git a/drivers/scsi/snic/wq_enet_desc.h b/drivers/scsi/snic/wq_enet_desc.h new file mode 100644 index 0000000..68f62b6 --- /dev/null +++ b/drivers/scsi/snic/wq_enet_desc.h @@ -0,0 +1,96 @@ +/* + * Copyright 2014 Cisco 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 _WQ_ENET_DESC_H_ +#define _WQ_ENET_DESC_H_ + +/* Ethernet work queue descriptor: 16B */ +struct wq_enet_desc { + __le64 address; + __le16 length; + __le16 mss_loopback; + __le16 header_length_flags; + __le16 vlan_tag; +}; + +#define WQ_ENET_ADDR_BITS 64 +#define WQ_ENET_LEN_BITS 14 +#define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) +#define WQ_ENET_MSS_BITS 14 +#define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) +#define WQ_ENET_MSS_SHIFT 2 +#define WQ_ENET_LOOPBACK_SHIFT 1 +#define WQ_ENET_HDRLEN_BITS 10 +#define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) +#define WQ_ENET_FLAGS_OM_BITS 2 +#define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) +#define WQ_ENET_FLAGS_EOP_SHIFT 12 +#define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 +#define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 +#define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 + +#define WQ_ENET_OFFLOAD_MODE_CSUM 0 +#define WQ_ENET_OFFLOAD_MODE_RESERVED 1 +#define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 +#define WQ_ENET_OFFLOAD_MODE_TSO 3 + +static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, + u64 address, u16 length, u16 mss, u16 header_length, + u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, + u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) +{ + desc->address = cpu_to_le64(address); + desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); + desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << + WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); + desc->header_length_flags = cpu_to_le16( + (header_length & WQ_ENET_HDRLEN_MASK) | + (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | + (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | + (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | + (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | + (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); + desc->vlan_tag = cpu_to_le16(vlan_tag); +} + +static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, + u64 *address, u16 *length, u16 *mss, u16 *header_length, + u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, + u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) +{ + *address = le64_to_cpu(desc->address); + *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; + *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & + WQ_ENET_MSS_MASK; + *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> + WQ_ENET_LOOPBACK_SHIFT) & 1); + *header_length = le16_to_cpu(desc->header_length_flags) & + WQ_ENET_HDRLEN_MASK; + *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> + WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); + *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> + WQ_ENET_FLAGS_EOP_SHIFT) & 1); + *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> + WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); + *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> + WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); + *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> + WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); + *vlan_tag = le16_to_cpu(desc->vlan_tag); +} + +#endif /* _WQ_ENET_DESC_H_ */