From 6fe6611ff275522a4e4c0359e2f46cdd07780d2f Mon Sep 17 00:00:00 2001 From: huangdaode Date: Thu, 17 Sep 2015 14:51:48 +0800 Subject: [PATCH] net: add Hisilicon Network Subsystem hnae framework support 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 Signed-off-by: Kenneth Lee Signed-off-by: Yisen Zhuang Signed-off-by: David S. Miller --- drivers/net/ethernet/hisilicon/Kconfig | 7 + drivers/net/ethernet/hisilicon/Makefile | 1 + drivers/net/ethernet/hisilicon/hns/Makefile | 5 + drivers/net/ethernet/hisilicon/hns/hnae.c | 507 +++++++++++++++++ drivers/net/ethernet/hisilicon/hns/hnae.h | 583 ++++++++++++++++++++ 5 files changed, 1103 insertions(+) create mode 100644 drivers/net/ethernet/hisilicon/hns/Makefile create mode 100644 drivers/net/ethernet/hisilicon/hns/hnae.c create mode 100644 drivers/net/ethernet/hisilicon/hns/hnae.h diff --git a/drivers/net/ethernet/hisilicon/Kconfig b/drivers/net/ethernet/hisilicon/Kconfig index 9184f1d0f92b..85a2609185ad 100644 --- a/drivers/net/ethernet/hisilicon/Kconfig +++ b/drivers/net/ethernet/hisilicon/Kconfig @@ -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 diff --git a/drivers/net/ethernet/hisilicon/Makefile b/drivers/net/ethernet/hisilicon/Makefile index 04b4b2177ff4..390b71fb3000 100644 --- a/drivers/net/ethernet/hisilicon/Makefile +++ b/drivers/net/ethernet/hisilicon/Makefile @@ -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 index 000000000000..8a5f1e70e936 --- /dev/null +++ b/drivers/net/ethernet/hisilicon/hns/Makefile @@ -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 index 000000000000..0a0a9e80dcd7 --- /dev/null +++ b/drivers/net/ethernet/hisilicon/hns/hnae.c @@ -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 +#include +#include +#include + +#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 index 000000000000..5edd8cdc2485 --- /dev/null +++ b/drivers/net/ethernet/hisilicon/hns/hnae.h @@ -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 +#include +#include +#include +#include +#include + +#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 -- 2.20.1