net: add Hisilicon Network Subsystem hnae framework support
authorhuangdaode <huangdaode@hisilicon.com>
Thu, 17 Sep 2015 06:51:48 +0000 (14:51 +0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 21 Sep 2015 04:42:57 +0000 (21:42 -0700)
HNAE (Hisilicon Network Acceleration Engine) is a framework to provide a
unified ring buffer interface for Hisilicon Network Acceleration
Engines.

With the interface, upper layer can work as ethernet driver, ODP driver
or other service driver on purpose.

Signed-off-by: huangdaode <huangdaode@hisilicon.com>
Signed-off-by: Kenneth Lee <liguozhu@huawei.com>
Signed-off-by: Yisen Zhuang <Yisen.Zhuang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/hisilicon/Kconfig
drivers/net/ethernet/hisilicon/Makefile
drivers/net/ethernet/hisilicon/hns/Makefile [new file with mode: 0644]
drivers/net/ethernet/hisilicon/hns/hnae.c [new file with mode: 0644]
drivers/net/ethernet/hisilicon/hns/hnae.h [new file with mode: 0644]

index 9184f1d0f92b5ad827c2f10f7e77856133a13c49..85a2609185adf45f35532dda38a4a6faf563cd5e 100644 (file)
@@ -39,4 +39,11 @@ config HNS_MDIO
          This selects the HNS MDIO support. It is needed by HNS_DSAF to access
          the PHY
 
+config HNS
+       tristate "Hisilicon Network Subsystem Support (Framework)"
+       ---help---
+         This selects the framework support for Hisilicon Network Subsystem. It
+         is needed by any driver which provides HNS acceleration engine or make
+         use of the engine
+
 endif # NET_VENDOR_HISILICON
index 04b4b2177ff48d434e368485f0d433cd71c5c105..390b71fb300062f18ffe0621fa20ded653aef11e 100644 (file)
@@ -5,3 +5,4 @@
 obj-$(CONFIG_HIX5HD2_GMAC) += hix5hd2_gmac.o
 obj-$(CONFIG_HIP04_ETH) += hip04_eth.o
 obj-$(CONFIG_HNS_MDIO) += hns_mdio.o
+obj-$(CONFIG_HNS) += hns/
diff --git a/drivers/net/ethernet/hisilicon/hns/Makefile b/drivers/net/ethernet/hisilicon/hns/Makefile
new file mode 100644 (file)
index 0000000..8a5f1e7
--- /dev/null
@@ -0,0 +1,5 @@
+#
+# Makefile for the HISILICON network device drivers.
+#
+
+obj-$(CONFIG_HNS) += hnae.o
diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.c b/drivers/net/ethernet/hisilicon/hns/hnae.c
new file mode 100644 (file)
index 0000000..0a0a9e8
--- /dev/null
@@ -0,0 +1,507 @@
+/*
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+
+#include "hnae.h"
+
+#define cls_to_ae_dev(dev) container_of(dev, struct hnae_ae_dev, cls_dev)
+
+static struct class *hnae_class;
+
+static void
+hnae_list_add(spinlock_t *lock, struct list_head *node, struct list_head *head)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(lock, flags);
+       list_add_tail_rcu(node, head);
+       spin_unlock_irqrestore(lock, flags);
+}
+
+static void hnae_list_del(spinlock_t *lock, struct list_head *node)
+{
+       unsigned long flags;
+
+       spin_lock_irqsave(lock, flags);
+       list_del_rcu(node);
+       spin_unlock_irqrestore(lock, flags);
+}
+
+static int hnae_alloc_buffer(struct hnae_ring *ring, struct hnae_desc_cb *cb)
+{
+       unsigned int order = hnae_page_order(ring);
+       struct page *p = dev_alloc_pages(order);
+
+       if (!p)
+               return -ENOMEM;
+
+       cb->priv = p;
+       cb->page_offset = 0;
+       cb->reuse_flag = 0;
+       cb->buf  = page_address(p);
+       cb->length = hnae_page_size(ring);
+       cb->type = DESC_TYPE_PAGE;
+
+       return 0;
+}
+
+static void hnae_free_buffer(struct hnae_ring *ring, struct hnae_desc_cb *cb)
+{
+       if (cb->type == DESC_TYPE_SKB)
+               dev_kfree_skb_any((struct sk_buff *)cb->priv);
+       else if (unlikely(is_rx_ring(ring)))
+               put_page((struct page *)cb->priv);
+       memset(cb, 0, sizeof(*cb));
+}
+
+static int hnae_map_buffer(struct hnae_ring *ring, struct hnae_desc_cb *cb)
+{
+       cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
+                              cb->length, ring_to_dma_dir(ring));
+
+       if (dma_mapping_error(ring_to_dev(ring), cb->dma))
+               return -EIO;
+
+       return 0;
+}
+
+static void hnae_unmap_buffer(struct hnae_ring *ring, struct hnae_desc_cb *cb)
+{
+       if (cb->type == DESC_TYPE_SKB)
+               dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
+                                ring_to_dma_dir(ring));
+       else
+               dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
+                              ring_to_dma_dir(ring));
+}
+
+static struct hnae_buf_ops hnae_bops = {
+       .alloc_buffer = hnae_alloc_buffer,
+       .free_buffer = hnae_free_buffer,
+       .map_buffer = hnae_map_buffer,
+       .unmap_buffer = hnae_unmap_buffer,
+};
+
+static int __ae_match(struct device *dev, const void *data)
+{
+       struct hnae_ae_dev *hdev = cls_to_ae_dev(dev);
+       const char *ae_id = data;
+
+       if (!strncmp(ae_id, hdev->name, AE_NAME_SIZE))
+               return 1;
+
+       return 0;
+}
+
+static struct hnae_ae_dev *find_ae(const char *ae_id)
+{
+       struct device *dev;
+
+       WARN_ON(!ae_id);
+
+       dev = class_find_device(hnae_class, NULL, ae_id, __ae_match);
+
+       return dev ? cls_to_ae_dev(dev) : NULL;
+}
+
+static void hnae_free_buffers(struct hnae_ring *ring)
+{
+       int i;
+
+       for (i = 0; i < ring->desc_num; i++)
+               hnae_free_buffer_detach(ring, i);
+}
+
+/* Allocate memory for raw pkg, and map with dma */
+static int hnae_alloc_buffers(struct hnae_ring *ring)
+{
+       int i, j, ret;
+
+       for (i = 0; i < ring->desc_num; i++) {
+               ret = hnae_alloc_buffer_attach(ring, i);
+               if (ret)
+                       goto out_buffer_fail;
+       }
+
+       return 0;
+
+out_buffer_fail:
+       for (j = i - 1; j >= 0; j--)
+               hnae_free_buffer_detach(ring, j);
+       return ret;
+}
+
+/* free desc along with its attached buffer */
+static void hnae_free_desc(struct hnae_ring *ring)
+{
+       hnae_free_buffers(ring);
+       dma_unmap_single(ring_to_dev(ring), ring->desc_dma_addr,
+                        ring->desc_num * sizeof(ring->desc[0]),
+                        ring_to_dma_dir(ring));
+       ring->desc_dma_addr = 0;
+       kfree(ring->desc);
+       ring->desc = NULL;
+}
+
+/* alloc desc, without buffer attached */
+static int hnae_alloc_desc(struct hnae_ring *ring)
+{
+       int size = ring->desc_num * sizeof(ring->desc[0]);
+
+       ring->desc = kzalloc(size, GFP_KERNEL);
+       if (!ring->desc)
+               return -ENOMEM;
+
+       ring->desc_dma_addr = dma_map_single(ring_to_dev(ring),
+               ring->desc, size, ring_to_dma_dir(ring));
+       if (dma_mapping_error(ring_to_dev(ring), ring->desc_dma_addr)) {
+               ring->desc_dma_addr = 0;
+               kfree(ring->desc);
+               ring->desc = NULL;
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+/* fini ring, also free the buffer for the ring */
+static void hnae_fini_ring(struct hnae_ring *ring)
+{
+       hnae_free_desc(ring);
+       kfree(ring->desc_cb);
+       ring->desc_cb = NULL;
+       ring->next_to_clean = 0;
+       ring->next_to_use = 0;
+}
+
+/* init ring, and with buffer for rx ring */
+static int
+hnae_init_ring(struct hnae_queue *q, struct hnae_ring *ring, int flags)
+{
+       int ret;
+
+       if (ring->desc_num <= 0 || ring->buf_size <= 0)
+               return -EINVAL;
+
+       ring->q = q;
+       ring->flags = flags;
+       assert(!ring->desc && !ring->desc_cb && !ring->desc_dma_addr);
+
+       /* not matter for tx or rx ring, the ntc and ntc start from 0 */
+       assert(ring->next_to_use == 0);
+       assert(ring->next_to_clean == 0);
+
+       ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
+                       GFP_KERNEL);
+       if (!ring->desc_cb) {
+               ret = -ENOMEM;
+               goto out;
+       }
+
+       ret = hnae_alloc_desc(ring);
+       if (ret)
+               goto out_with_desc_cb;
+
+       if (is_rx_ring(ring)) {
+               ret = hnae_alloc_buffers(ring);
+               if (ret)
+                       goto out_with_desc;
+       }
+
+       return 0;
+
+out_with_desc:
+       hnae_free_desc(ring);
+out_with_desc_cb:
+       kfree(ring->desc_cb);
+       ring->desc_cb = NULL;
+out:
+       return ret;
+}
+
+static int hnae_init_queue(struct hnae_handle *h, struct hnae_queue *q,
+                          struct hnae_ae_dev *dev)
+{
+       int ret;
+
+       q->dev = dev;
+       q->handle = h;
+
+       ret = hnae_init_ring(q, &q->tx_ring, q->tx_ring.flags | RINGF_DIR);
+       if (ret)
+               goto out;
+
+       ret = hnae_init_ring(q, &q->rx_ring, q->rx_ring.flags & ~RINGF_DIR);
+       if (ret)
+               goto out_with_tx_ring;
+
+       if (dev->ops->init_queue)
+               dev->ops->init_queue(q);
+
+       return 0;
+
+out_with_tx_ring:
+       hnae_fini_ring(&q->tx_ring);
+out:
+       return ret;
+}
+
+static void hnae_fini_queue(struct hnae_queue *q)
+{
+       if (q->dev->ops->fini_queue)
+               q->dev->ops->fini_queue(q);
+
+       hnae_fini_ring(&q->tx_ring);
+       hnae_fini_ring(&q->rx_ring);
+}
+
+/**
+ * ae_chain - define ae chain head
+ */
+static RAW_NOTIFIER_HEAD(ae_chain);
+
+int hnae_register_notifier(struct notifier_block *nb)
+{
+       return raw_notifier_chain_register(&ae_chain, nb);
+}
+EXPORT_SYMBOL(hnae_register_notifier);
+
+void hnae_unregister_notifier(struct notifier_block *nb)
+{
+       if (raw_notifier_chain_unregister(&ae_chain, nb))
+               dev_err(NULL, "notifier chain unregister fail\n");
+}
+EXPORT_SYMBOL(hnae_unregister_notifier);
+
+int hnae_reinit_handle(struct hnae_handle *handle)
+{
+       int i, j;
+       int ret;
+
+       for (i = 0; i < handle->q_num; i++) /* free ring*/
+               hnae_fini_queue(handle->qs[i]);
+
+       if (handle->dev->ops->reset)
+               handle->dev->ops->reset(handle);
+
+       for (i = 0; i < handle->q_num; i++) {/* reinit ring*/
+               ret = hnae_init_queue(handle, handle->qs[i], handle->dev);
+               if (ret)
+                       goto out_when_init_queue;
+       }
+       return 0;
+out_when_init_queue:
+       for (j = i - 1; j >= 0; j--)
+               hnae_fini_queue(handle->qs[j]);
+       return ret;
+}
+EXPORT_SYMBOL(hnae_reinit_handle);
+
+/* hnae_get_handle - get a handle from the AE
+ * @owner_dev: the dev use this handle
+ * @ae_id: the id of the ae to be used
+ * @ae_opts: the options set for the handle
+ * @bops: the callbacks for buffer management
+ *
+ * return handle ptr or ERR_PTR
+ */
+struct hnae_handle *hnae_get_handle(struct device *owner_dev,
+                                   const char *ae_id, u32 port_id,
+                                   struct hnae_buf_ops *bops)
+{
+       struct hnae_ae_dev *dev;
+       struct hnae_handle *handle;
+       int i, j;
+       int ret;
+
+       dev = find_ae(ae_id);
+       if (!dev)
+               return ERR_PTR(-ENODEV);
+
+       handle = dev->ops->get_handle(dev, port_id);
+       if (IS_ERR(handle))
+               return handle;
+
+       handle->dev = dev;
+       handle->owner_dev = owner_dev;
+       handle->bops = bops ? bops : &hnae_bops;
+       handle->eport_id = port_id;
+
+       for (i = 0; i < handle->q_num; i++) {
+               ret = hnae_init_queue(handle, handle->qs[i], dev);
+               if (ret)
+                       goto out_when_init_queue;
+       }
+
+       __module_get(dev->owner);
+
+       hnae_list_add(&dev->lock, &handle->node, &dev->handle_list);
+
+       return handle;
+
+out_when_init_queue:
+       for (j = i - 1; j >= 0; j--)
+               hnae_fini_queue(handle->qs[j]);
+
+       return ERR_PTR(-ENOMEM);
+}
+EXPORT_SYMBOL(hnae_get_handle);
+
+void hnae_put_handle(struct hnae_handle *h)
+{
+       struct hnae_ae_dev *dev = h->dev;
+       int i;
+
+       for (i = 0; i < h->q_num; i++)
+               hnae_fini_queue(h->qs[i]);
+
+       if (h->dev->ops->reset)
+               h->dev->ops->reset(h);
+
+       hnae_list_del(&dev->lock, &h->node);
+
+       if (dev->ops->put_handle)
+               dev->ops->put_handle(h);
+
+       module_put(dev->owner);
+}
+EXPORT_SYMBOL(hnae_put_handle);
+
+static void hnae_release(struct device *dev)
+{
+}
+
+/**
+ * hnae_ae_register - register a AE engine to hnae framework
+ * @hdev: the hnae ae engine device
+ * @owner:  the module who provides this dev
+ * NOTE: the duplicated name will not be checked
+ */
+int hnae_ae_register(struct hnae_ae_dev *hdev, struct module *owner)
+{
+       static atomic_t id = ATOMIC_INIT(-1);
+       int ret;
+
+       if (!hdev->dev)
+               return -ENODEV;
+
+       if (!hdev->ops || !hdev->ops->get_handle ||
+           !hdev->ops->toggle_ring_irq ||
+           !hdev->ops->toggle_queue_status ||
+           !hdev->ops->get_status || !hdev->ops->adjust_link)
+               return -EINVAL;
+
+       hdev->owner = owner;
+       hdev->id = (int)atomic_inc_return(&id);
+       hdev->cls_dev.parent = hdev->dev;
+       hdev->cls_dev.class = hnae_class;
+       hdev->cls_dev.release = hnae_release;
+       (void)dev_set_name(&hdev->cls_dev, "hnae%d", hdev->id);
+       ret = device_register(&hdev->cls_dev);
+       if (ret)
+               return ret;
+
+       __module_get(THIS_MODULE);
+
+       INIT_LIST_HEAD(&hdev->handle_list);
+       spin_lock_init(&hdev->lock);
+
+       ret = raw_notifier_call_chain(&ae_chain, HNAE_AE_REGISTER, NULL);
+       if (ret)
+               dev_dbg(hdev->dev,
+                       "has not notifier for AE: %s\n", hdev->name);
+
+       return 0;
+}
+EXPORT_SYMBOL(hnae_ae_register);
+
+/**
+ * hnae_ae_unregister - unregisters a HNAE AE engine
+ * @cdev: the device to unregister
+ */
+void hnae_ae_unregister(struct hnae_ae_dev *hdev)
+{
+       device_unregister(&hdev->cls_dev);
+       module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL(hnae_ae_unregister);
+
+static ssize_t handles_show(struct device *dev,
+                           struct device_attribute *attr, char *buf)
+{
+       ssize_t s = 0;
+       struct hnae_ae_dev *hdev = cls_to_ae_dev(dev);
+       struct hnae_handle *h;
+       int i = 0, j;
+
+       list_for_each_entry_rcu(h, &hdev->handle_list, node) {
+               s += sprintf(buf + s, "handle %d (eport_id=%u from %s):\n",
+                           i++, h->eport_id, h->dev->name);
+               for (j = 0; j < h->q_num; j++) {
+                       s += sprintf(buf + s, "\tqueue[%d] on 0x%llx\n",
+                                    j, (u64)h->qs[i]->io_base);
+#define HANDEL_TX_MSG "\t\ttx_ring on 0x%llx:%u,%u,%u,%u,%u,%llu,%llu\n"
+                       s += sprintf(buf + s,
+                                    HANDEL_TX_MSG,
+                                    (u64)h->qs[i]->tx_ring.io_base,
+                                    h->qs[i]->tx_ring.buf_size,
+                                    h->qs[i]->tx_ring.desc_num,
+                                    h->qs[i]->tx_ring.max_desc_num_per_pkt,
+                                    h->qs[i]->tx_ring.max_raw_data_sz_per_desc,
+                                    h->qs[i]->tx_ring.max_pkt_size,
+                                h->qs[i]->tx_ring.stats.sw_err_cnt,
+                                h->qs[i]->tx_ring.stats.io_err_cnt);
+                       s += sprintf(buf + s,
+                               "\t\trx_ring on 0x%llx:%u,%u,%llu,%llu,%llu\n",
+                               (u64)h->qs[i]->rx_ring.io_base,
+                               h->qs[i]->rx_ring.buf_size,
+                               h->qs[i]->rx_ring.desc_num,
+                               h->qs[i]->rx_ring.stats.sw_err_cnt,
+                               h->qs[i]->rx_ring.stats.io_err_cnt,
+                               h->qs[i]->rx_ring.stats.seg_pkt_cnt);
+               }
+       }
+
+       return s;
+}
+
+static DEVICE_ATTR_RO(handles);
+static struct attribute *hnae_class_attrs[] = {
+       &dev_attr_handles.attr,
+       NULL,
+};
+ATTRIBUTE_GROUPS(hnae_class);
+
+static int __init hnae_init(void)
+{
+       hnae_class = class_create(THIS_MODULE, "hnae");
+       if (IS_ERR(hnae_class))
+               return PTR_ERR(hnae_class);
+
+       hnae_class->dev_groups = hnae_class_groups;
+       return 0;
+}
+
+static void __exit hnae_exit(void)
+{
+       class_destroy(hnae_class);
+}
+
+subsys_initcall(hnae_init);
+module_exit(hnae_exit);
+
+MODULE_AUTHOR("Hisilicon, Inc.");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Hisilicon Network Acceleration Engine Framework");
+
+/* vi: set tw=78 noet: */
diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.h b/drivers/net/ethernet/hisilicon/hns/hnae.h
new file mode 100644 (file)
index 0000000..5edd8cd
--- /dev/null
@@ -0,0 +1,583 @@
+/*
+ * Copyright (c) 2014-2015 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __HNAE_H
+#define __HNAE_H
+
+/* Names used in this framework:
+ *      ae handle (handle):
+ *        a set of queues provided by AE
+ *      ring buffer queue (rbq):
+ *        the channel between upper layer and the AE, can do tx and rx
+ *      ring:
+ *        a tx or rx channel within a rbq
+ *      ring description (desc):
+ *        an element in the ring with packet information
+ *      buffer:
+ *        a memory region referred by desc with the full packet payload
+ *
+ * "num" means a static number set as a parameter, "count" mean a dynamic
+ *   number set while running
+ * "cb" means control block
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/notifier.h>
+#include <linux/types.h>
+
+#define HNAE_DRIVER_VERSION "1.3.0"
+#define HNAE_DRIVER_NAME "hns"
+#define HNAE_COPYRIGHT "Copyright(c) 2015 Huawei Corporation."
+#define HNAE_DRIVER_STRING "Hisilicon Network Subsystem Driver"
+#define HNAE_DEFAULT_DEVICE_DESCR "Hisilicon Network Subsystem"
+
+#ifdef DEBUG
+
+#ifndef assert
+#define assert(expr) \
+do { \
+       if (!(expr)) { \
+               pr_err("Assertion failed! %s, %s, %s, line %d\n", \
+                          #expr, __FILE__, __func__, __LINE__); \
+       } \
+} while (0)
+#endif
+
+#else
+
+#ifndef assert
+#define assert(expr)
+#endif
+
+#endif
+
+#define AE_VERSION_1 ('6' << 16 | '6' << 8 | '0')
+#define AE_VERSION_2 ('1' << 24 | '6' << 16 | '1' << 8 | '0')
+#define AE_NAME_SIZE 16
+
+/* some said the RX and TX RCB format should not be the same in the future. But
+ * it is the same now...
+ */
+#define RCB_REG_BASEADDR_L         0x00 /* P660 support only 32bit accessing */
+#define RCB_REG_BASEADDR_H         0x04
+#define RCB_REG_BD_NUM             0x08
+#define RCB_REG_BD_LEN             0x0C
+#define RCB_REG_PKTLINE            0x10
+#define RCB_REG_TAIL               0x18
+#define RCB_REG_HEAD               0x1C
+#define RCB_REG_FBDNUM             0x20
+#define RCB_REG_OFFSET             0x24 /* pkt num to be handled */
+#define RCB_REG_PKTNUM_RECORD      0x2C /* total pkt received */
+
+#define HNS_RX_HEAD_SIZE 256
+
+#define HNAE_AE_REGISTER 0x1
+
+#define RCB_RING_NAME_LEN 16
+
+enum hnae_led_state {
+       HNAE_LED_INACTIVE,
+       HNAE_LED_ACTIVE,
+       HNAE_LED_ON,
+       HNAE_LED_OFF
+};
+
+#define HNS_RX_FLAG_VLAN_PRESENT 0x1
+#define HNS_RX_FLAG_L3ID_IPV4 0x0
+#define HNS_RX_FLAG_L3ID_IPV6 0x1
+#define HNS_RX_FLAG_L4ID_UDP 0x0
+#define HNS_RX_FLAG_L4ID_TCP 0x1
+
+#define HNS_TXD_ASID_S 0
+#define HNS_TXD_ASID_M (0xff << HNS_TXD_ASID_S)
+#define HNS_TXD_BUFNUM_S 8
+#define HNS_TXD_BUFNUM_M (0x3 << HNS_TXD_BUFNUM_S)
+#define HNS_TXD_PORTID_S 10
+#define HNS_TXD_PORTID_M (0x7 << HNS_TXD_PORTID_S)
+
+#define HNS_TXD_RA_B 8
+#define HNS_TXD_RI_B 9
+#define HNS_TXD_L4CS_B 10
+#define HNS_TXD_L3CS_B 11
+#define HNS_TXD_FE_B 12
+#define HNS_TXD_VLD_B 13
+#define HNS_TXD_IPOFFSET_S 14
+#define HNS_TXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
+
+#define HNS_RXD_IPOFFSET_S 0
+#define HNS_RXD_IPOFFSET_M (0xff << HNS_TXD_IPOFFSET_S)
+#define HNS_RXD_BUFNUM_S 8
+#define HNS_RXD_BUFNUM_M (0x3 << HNS_RXD_BUFNUM_S)
+#define HNS_RXD_PORTID_S 10
+#define HNS_RXD_PORTID_M (0x7 << HNS_RXD_PORTID_S)
+#define HNS_RXD_DMAC_S 13
+#define HNS_RXD_DMAC_M (0x3 << HNS_RXD_DMAC_S)
+#define HNS_RXD_VLAN_S 15
+#define HNS_RXD_VLAN_M (0x3 << HNS_RXD_VLAN_S)
+#define HNS_RXD_L3ID_S 17
+#define HNS_RXD_L3ID_M (0xf << HNS_RXD_L3ID_S)
+#define HNS_RXD_L4ID_S 21
+#define HNS_RXD_L4ID_M (0xf << HNS_RXD_L4ID_S)
+#define HNS_RXD_FE_B 25
+#define HNS_RXD_FRAG_B 26
+#define HNS_RXD_VLD_B 27
+#define HNS_RXD_L2E_B 28
+#define HNS_RXD_L3E_B 29
+#define HNS_RXD_L4E_B 30
+#define HNS_RXD_DROP_B 31
+
+#define HNS_RXD_VLANID_S 8
+#define HNS_RXD_VLANID_M (0xfff << HNS_RXD_VLANID_S)
+#define HNS_RXD_CFI_B 20
+#define HNS_RXD_PRI_S 21
+#define HNS_RXD_PRI_M (0x7 << HNS_RXD_PRI_S)
+#define HNS_RXD_ASID_S 24
+#define HNS_RXD_ASID_M (0xff << HNS_RXD_ASID_S)
+
+/* hardware spec ring buffer format */
+struct __packed hnae_desc {
+       __le64 addr;
+       union {
+               struct {
+                       __le16 asid_bufnum_pid;
+                       __le16 send_size;
+                       __le32 flag_ipoffset;
+                       __le32 reserved_3[4];
+               } tx;
+
+               struct {
+                       __le32 ipoff_bnum_pid_flag;
+                       __le16 pkt_len;
+                       __le16 size;
+                       __le32 vlan_pri_asid;
+                       __le32 reserved_2[3];
+               } rx;
+       };
+};
+
+struct hnae_desc_cb {
+       dma_addr_t dma; /* dma address of this desc */
+       void *buf;      /* cpu addr for a desc */
+
+       /* priv data for the desc, e.g. skb when use with ip stack*/
+       void *priv;
+       u16 page_offset;
+       u16 reuse_flag;
+
+       u16 length;     /* length of the buffer */
+
+       /* desc type, used by the ring user to mark the type of the priv data */
+       u16 type;
+};
+
+#define setflags(flags, bits) ((flags) |= (bits))
+#define unsetflags(flags, bits) ((flags) &= ~(bits))
+
+/* hnae_ring->flags fields */
+#define RINGF_DIR 0x1      /* TX or RX ring, set if TX */
+#define is_tx_ring(ring) ((ring)->flags & RINGF_DIR)
+#define is_rx_ring(ring) (!is_tx_ring(ring))
+#define ring_to_dma_dir(ring) (is_tx_ring(ring) ? \
+       DMA_TO_DEVICE : DMA_FROM_DEVICE)
+
+struct ring_stats {
+       u64 io_err_cnt;
+       u64 sw_err_cnt;
+       u64 seg_pkt_cnt;
+       union {
+               struct {
+                       u64 tx_pkts;
+                       u64 tx_bytes;
+                       u64 tx_err_cnt;
+                       u64 restart_queue;
+                       u64 tx_busy;
+               };
+               struct {
+                       u64 rx_pkts;
+                       u64 rx_bytes;
+                       u64 rx_err_cnt;
+                       u64 reuse_pg_cnt;
+                       u64 err_pkt_len;
+                       u64 non_vld_descs;
+                       u64 err_bd_num;
+                       u64 l2_err;
+                       u64 l3l4_csum_err;
+               };
+       };
+};
+
+struct hnae_queue;
+
+struct hnae_ring {
+       u8 __iomem *io_base; /* base io address for the ring */
+       struct hnae_desc *desc; /* dma map address space */
+       struct hnae_desc_cb *desc_cb;
+       struct hnae_queue *q;
+       int irq;
+       char ring_name[RCB_RING_NAME_LEN];
+
+       /* statistic */
+       struct ring_stats stats;
+
+       dma_addr_t desc_dma_addr;
+       u32 buf_size;       /* size for hnae_desc->addr, preset by AE */
+       u16 desc_num;       /* total number of desc */
+       u16 max_desc_num_per_pkt;
+       u16 max_raw_data_sz_per_desc;
+       u16 max_pkt_size;
+       int next_to_use;    /* idx of next spare desc */
+
+       /* idx of lastest sent desc, the ring is empty when equal to
+        * next_to_use
+        */
+       int next_to_clean;
+
+       int flags;          /* ring attribute */
+       int irq_init_flag;
+};
+
+#define ring_ptr_move_fw(ring, p) \
+       ((ring)->p = ((ring)->p + 1) % (ring)->desc_num)
+#define ring_ptr_move_bw(ring, p) \
+       ((ring)->p = ((ring)->p - 1 + (ring)->desc_num) % (ring)->desc_num)
+
+enum hns_desc_type {
+       DESC_TYPE_SKB,
+       DESC_TYPE_PAGE,
+};
+
+#define assert_is_ring_idx(ring, idx) \
+       assert((idx) >= 0 && (idx) < (ring)->desc_num)
+
+/* the distance between [begin, end) in a ring buffer
+ * note: there is a unuse slot between the begin and the end
+ */
+static inline int ring_dist(struct hnae_ring *ring, int begin, int end)
+{
+       assert_is_ring_idx(ring, begin);
+       assert_is_ring_idx(ring, end);
+
+       return (end - begin + ring->desc_num) % ring->desc_num;
+}
+
+static inline int ring_space(struct hnae_ring *ring)
+{
+       return ring->desc_num -
+               ring_dist(ring, ring->next_to_clean, ring->next_to_use) - 1;
+}
+
+static inline int is_ring_empty(struct hnae_ring *ring)
+{
+       assert_is_ring_idx(ring, ring->next_to_use);
+       assert_is_ring_idx(ring, ring->next_to_clean);
+
+       return ring->next_to_use == ring->next_to_clean;
+}
+
+#define hnae_buf_size(_ring) ((_ring)->buf_size)
+#define hnae_page_order(_ring) (get_order(hnae_buf_size(_ring)))
+#define hnae_page_size(_ring) (PAGE_SIZE << hnae_page_order(_ring))
+
+struct hnae_handle;
+
+/* allocate and dma map space for hnae desc */
+struct hnae_buf_ops {
+       int (*alloc_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
+       void (*free_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
+       int (*map_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
+       void (*unmap_buffer)(struct hnae_ring *ring, struct hnae_desc_cb *cb);
+};
+
+struct hnae_queue {
+       void __iomem *io_base;
+       phys_addr_t phy_base;
+       struct hnae_ae_dev *dev;        /* the device who use this queue */
+       struct hnae_ring rx_ring, tx_ring;
+       struct hnae_handle *handle;
+};
+
+/*hnae loop mode*/
+enum hnae_loop {
+       MAC_INTERNALLOOP_MAC = 0,
+       MAC_INTERNALLOOP_SERDES,
+       MAC_INTERNALLOOP_PHY,
+       MAC_LOOP_NONE,
+};
+
+/*hnae port type*/
+enum hnae_port_type {
+       HNAE_PORT_SERVICE = 0,
+       HNAE_PORT_DEBUG
+};
+
+/* This struct defines the operation on the handle.
+ *
+ * get_handle(): (mandatory)
+ *   Get a handle from AE according to its name and options.
+ *   the AE driver should manage the space used by handle and its queues while
+ *   the HNAE framework will allocate desc and desc_cb for all rings in the
+ *   queues.
+ * put_handle():
+ *   Release the handle.
+ * start():
+ *   Enable the hardware, include all queues
+ * stop():
+ *   Disable the hardware
+ * set_opts(): (mandatory)
+ *   Set options to the AE
+ * get_opts(): (mandatory)
+ *   Get options from the AE
+ * get_status():
+ *   Get the carrier state of the back channel of the handle, 1 for ok, 0 for
+ *   non-ok
+ * toggle_ring_irq(): (mandatory)
+ *   Set the ring irq to be enabled(0) or disable(1)
+ * toggle_queue_status(): (mandatory)
+ *   Set the queue to be enabled(1) or disable(0), this will not change the
+ *   ring irq state
+ * adjust_link()
+ *   adjust link status
+ * set_loopback()
+ *   set loopback
+ * get_ring_bdnum_limit()
+ *   get ring bd number limit
+ * get_pauseparam()
+ *   get tx and rx of pause frame use
+ * set_autoneg()
+ *   set auto autonegotiation of pause frame use
+ * get_autoneg()
+ *   get auto autonegotiation of pause frame use
+ * set_pauseparam()
+ *   set tx and rx of pause frame use
+ * get_coalesce_usecs()
+ *   get usecs to delay a TX interrupt after a packet is sent
+ * get_rx_max_coalesced_frames()
+ *   get Maximum number of packets to be sent before a TX interrupt.
+ * set_coalesce_usecs()
+ *   set usecs to delay a TX interrupt after a packet is sent
+ * set_coalesce_frames()
+ *   set Maximum number of packets to be sent before a TX interrupt.
+ * get_ringnum()
+ *   get RX/TX ring number
+ * get_max_ringnum()
+ *   get RX/TX ring maximum number
+ * get_mac_addr()
+ *   get mac address
+ * set_mac_addr()
+ *   set mac address
+ * set_mc_addr()
+ *   set multicast mode
+ * set_mtu()
+ *   set mtu
+ * update_stats()
+ *   update Old network device statistics
+ * get_ethtool_stats()
+ *   get ethtool network device statistics
+ * get_strings()
+ *   get a set of strings that describe the requested objects
+ * get_sset_count()
+ *   get number of strings that @get_strings will write
+ * update_led_status()
+ *   update the led status
+ * set_led_id()
+ *   set led id
+ * get_regs()
+ *   get regs dump
+ * get_regs_len()
+ *   get the len of the regs dump
+ */
+struct hnae_ae_ops {
+       struct hnae_handle *(*get_handle)(struct hnae_ae_dev *dev,
+                                         u32 port_id);
+       void (*put_handle)(struct hnae_handle *handle);
+       void (*init_queue)(struct hnae_queue *q);
+       void (*fini_queue)(struct hnae_queue *q);
+       int (*start)(struct hnae_handle *handle);
+       void (*stop)(struct hnae_handle *handle);
+       void (*reset)(struct hnae_handle *handle);
+       int (*set_opts)(struct hnae_handle *handle, int type, void *opts);
+       int (*get_opts)(struct hnae_handle *handle, int type, void **opts);
+       int (*get_status)(struct hnae_handle *handle);
+       int (*get_info)(struct hnae_handle *handle,
+                       u8 *auto_neg, u16 *speed, u8 *duplex);
+       void (*toggle_ring_irq)(struct hnae_ring *ring, u32 val);
+       void (*toggle_queue_status)(struct hnae_queue *queue, u32 val);
+       void (*adjust_link)(struct hnae_handle *handle, int speed, int duplex);
+       int (*set_loopback)(struct hnae_handle *handle,
+                           enum hnae_loop loop_mode, int en);
+       void (*get_ring_bdnum_limit)(struct hnae_queue *queue,
+                                    u32 *uplimit);
+       void (*get_pauseparam)(struct hnae_handle *handle,
+                              u32 *auto_neg, u32 *rx_en, u32 *tx_en);
+       int (*set_autoneg)(struct hnae_handle *handle, u8 enable);
+       int (*get_autoneg)(struct hnae_handle *handle);
+       int (*set_pauseparam)(struct hnae_handle *handle,
+                             u32 auto_neg, u32 rx_en, u32 tx_en);
+       void (*get_coalesce_usecs)(struct hnae_handle *handle,
+                                  u32 *tx_usecs, u32 *rx_usecs);
+       void (*get_rx_max_coalesced_frames)(struct hnae_handle *handle,
+                                           u32 *tx_frames, u32 *rx_frames);
+       void (*set_coalesce_usecs)(struct hnae_handle *handle, u32 timeout);
+       int (*set_coalesce_frames)(struct hnae_handle *handle,
+                                  u32 coalesce_frames);
+       int (*get_mac_addr)(struct hnae_handle *handle, void **p);
+       int (*set_mac_addr)(struct hnae_handle *handle, void *p);
+       int (*set_mc_addr)(struct hnae_handle *handle, void *addr);
+       int (*set_mtu)(struct hnae_handle *handle, int new_mtu);
+       void (*update_stats)(struct hnae_handle *handle,
+                            struct net_device_stats *net_stats);
+       void (*get_stats)(struct hnae_handle *handle, u64 *data);
+       void (*get_strings)(struct hnae_handle *handle,
+                           u32 stringset, u8 *data);
+       int (*get_sset_count)(struct hnae_handle *handle, int stringset);
+       void (*update_led_status)(struct hnae_handle *handle);
+       int (*set_led_id)(struct hnae_handle *handle,
+                         enum hnae_led_state status);
+       void (*get_regs)(struct hnae_handle *handle, void *data);
+       int (*get_regs_len)(struct hnae_handle *handle);
+};
+
+struct hnae_ae_dev {
+       struct device cls_dev; /* the class dev */
+       struct device *dev; /* the presented dev */
+       struct hnae_ae_ops *ops;
+       struct list_head node;
+       struct module *owner; /* the module who provides this dev */
+       int id;
+       char name[AE_NAME_SIZE];
+       struct list_head handle_list;
+       spinlock_t lock; /* lock to protect the handle_list */
+};
+
+struct hnae_handle {
+       struct device *owner_dev; /* the device which make use of this handle */
+       struct hnae_ae_dev *dev;  /* the device who provides this handle */
+       struct device_node *phy_node;
+       phy_interface_t phy_if;
+       u32 if_support;
+       int q_num;
+       int vf_id;
+       u32 eport_id;
+       enum hnae_port_type port_type;
+       struct list_head node;    /* list to hnae_ae_dev->handle_list */
+       struct hnae_buf_ops *bops; /* operation for the buffer */
+       struct hnae_queue **qs;  /* array base of all queues */
+};
+
+#define ring_to_dev(ring) ((ring)->q->dev->dev)
+
+struct hnae_handle *hnae_get_handle(struct device *owner_dev, const char *ae_id,
+                                   u32 port_id, struct hnae_buf_ops *bops);
+void hnae_put_handle(struct hnae_handle *handle);
+int hnae_ae_register(struct hnae_ae_dev *dev, struct module *owner);
+void hnae_ae_unregister(struct hnae_ae_dev *dev);
+
+int hnae_register_notifier(struct notifier_block *nb);
+void hnae_unregister_notifier(struct notifier_block *nb);
+int hnae_reinit_handle(struct hnae_handle *handle);
+
+#define hnae_queue_xmit(q, buf_num) writel_relaxed(buf_num, \
+       (q)->tx_ring.io_base + RCB_REG_TAIL)
+
+#ifndef assert
+#define assert(cond)
+#endif
+
+static inline int hnae_reserve_buffer_map(struct hnae_ring *ring,
+                                         struct hnae_desc_cb *cb)
+{
+       struct hnae_buf_ops *bops = ring->q->handle->bops;
+       int ret;
+
+       ret = bops->alloc_buffer(ring, cb);
+       if (ret)
+               goto out;
+
+       ret = bops->map_buffer(ring, cb);
+       if (ret)
+               goto out_with_buf;
+
+       return 0;
+
+out_with_buf:
+       bops->free_buffer(ring, cb);
+out:
+       return ret;
+}
+
+static inline int hnae_alloc_buffer_attach(struct hnae_ring *ring, int i)
+{
+       int ret = hnae_reserve_buffer_map(ring, &ring->desc_cb[i]);
+
+       if (ret)
+               return ret;
+
+       ring->desc[i].addr = (__le64)ring->desc_cb[i].dma;
+
+       return 0;
+}
+
+static inline void hnae_buffer_detach(struct hnae_ring *ring, int i)
+{
+       ring->q->handle->bops->unmap_buffer(ring, &ring->desc_cb[i]);
+       ring->desc[i].addr = 0;
+}
+
+static inline void hnae_free_buffer_detach(struct hnae_ring *ring, int i)
+{
+       struct hnae_buf_ops *bops = ring->q->handle->bops;
+       struct hnae_desc_cb *cb = &ring->desc_cb[i];
+
+       if (!ring->desc_cb[i].dma)
+               return;
+
+       hnae_buffer_detach(ring, i);
+       bops->free_buffer(ring, cb);
+}
+
+/* detach a in-used buffer and replace with a reserved one  */
+static inline void hnae_replace_buffer(struct hnae_ring *ring, int i,
+                                      struct hnae_desc_cb *res_cb)
+{
+       struct hnae_buf_ops *bops = ring->q->handle->bops;
+       struct hnae_desc_cb tmp_cb = ring->desc_cb[i];
+
+       bops->unmap_buffer(ring, &ring->desc_cb[i]);
+       ring->desc_cb[i] = *res_cb;
+       *res_cb = tmp_cb;
+       ring->desc[i].addr = (__le64)ring->desc_cb[i].dma;
+       ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
+}
+
+static inline void hnae_reuse_buffer(struct hnae_ring *ring, int i)
+{
+       ring->desc_cb[i].reuse_flag = 0;
+       ring->desc[i].addr = (__le64)(ring->desc_cb[i].dma
+               + ring->desc_cb[i].page_offset);
+       ring->desc[i].rx.ipoff_bnum_pid_flag = 0;
+}
+
+#define hnae_set_field(origin, mask, shift, val) \
+       do { \
+               (origin) &= (~(mask)); \
+               (origin) |= ((val) << (shift)) & (mask); \
+       } while (0)
+
+#define hnae_set_bit(origin, shift, val) \
+       hnae_set_field((origin), (0x1 << (shift)), (shift), (val))
+
+#define hnae_get_field(origin, mask, shift) (((origin) & (mask)) >> (shift))
+
+#define hnae_get_bit(origin, shift) \
+       hnae_get_field((origin), (0x1 << (shift)), (shift))
+
+#endif