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tegrakernel/kernel/kernel-4.9/drivers/net/ethernet/qlogic/qed/qed_ll2.c

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/* QLogic qed NIC Driver
*
* Copyright (c) 2015 QLogic Corporation
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#include <linux/types.h>
#include <asm/byteorder.h>
#include <linux/dma-mapping.h>
#include <linux/if_vlan.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/stddef.h>
#include <linux/version.h>
#include <linux/workqueue.h>
#include <net/ipv6.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/etherdevice.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/qed/qed_ll2_if.h>
#include "qed.h"
#include "qed_cxt.h"
#include "qed_dev_api.h"
#include "qed_hsi.h"
#include "qed_hw.h"
#include "qed_int.h"
#include "qed_ll2.h"
#include "qed_mcp.h"
#include "qed_reg_addr.h"
#include "qed_sp.h"
#include "qed_roce.h"
#define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred)
#define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred)
#define QED_LL2_TX_SIZE (256)
#define QED_LL2_RX_SIZE (4096)
struct qed_cb_ll2_info {
int rx_cnt;
u32 rx_size;
u8 handle;
bool frags_mapped;
/* Lock protecting LL2 buffer lists in sleepless context */
spinlock_t lock;
struct list_head list;
const struct qed_ll2_cb_ops *cbs;
void *cb_cookie;
};
struct qed_ll2_buffer {
struct list_head list;
void *data;
dma_addr_t phys_addr;
};
static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn,
u8 connection_handle,
void *cookie,
dma_addr_t first_frag_addr,
bool b_last_fragment,
bool b_last_packet)
{
struct qed_dev *cdev = p_hwfn->cdev;
struct sk_buff *skb = cookie;
/* All we need to do is release the mapping */
dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr,
skb_headlen(skb), DMA_TO_DEVICE);
if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb)
cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb,
b_last_fragment);
if (cdev->ll2->frags_mapped)
/* Case where mapped frags were received, need to
* free skb with nr_frags marked as 0
*/
skb_shinfo(skb)->nr_frags = 0;
dev_kfree_skb_any(skb);
}
static int qed_ll2_alloc_buffer(struct qed_dev *cdev,
u8 **data, dma_addr_t *phys_addr)
{
*data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC);
if (!(*data)) {
DP_INFO(cdev, "Failed to allocate LL2 buffer data\n");
return -ENOMEM;
}
*phys_addr = dma_map_single(&cdev->pdev->dev,
((*data) + NET_SKB_PAD),
cdev->ll2->rx_size, DMA_FROM_DEVICE);
if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) {
DP_INFO(cdev, "Failed to map LL2 buffer data\n");
kfree((*data));
return -ENOMEM;
}
return 0;
}
static int qed_ll2_dealloc_buffer(struct qed_dev *cdev,
struct qed_ll2_buffer *buffer)
{
spin_lock_bh(&cdev->ll2->lock);
dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
cdev->ll2->rx_size, DMA_FROM_DEVICE);
kfree(buffer->data);
list_del(&buffer->list);
cdev->ll2->rx_cnt--;
if (!cdev->ll2->rx_cnt)
DP_INFO(cdev, "All LL2 entries were removed\n");
spin_unlock_bh(&cdev->ll2->lock);
return 0;
}
static void qed_ll2_kill_buffers(struct qed_dev *cdev)
{
struct qed_ll2_buffer *buffer, *tmp_buffer;
list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list)
qed_ll2_dealloc_buffer(cdev, buffer);
}
static void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn,
u8 connection_handle,
struct qed_ll2_rx_packet *p_pkt,
struct core_rx_fast_path_cqe *p_cqe,
bool b_last_packet)
{
u16 packet_length = le16_to_cpu(p_cqe->packet_length);
struct qed_ll2_buffer *buffer = p_pkt->cookie;
struct qed_dev *cdev = p_hwfn->cdev;
u16 vlan = le16_to_cpu(p_cqe->vlan);
u32 opaque_data_0, opaque_data_1;
u8 pad = p_cqe->placement_offset;
dma_addr_t new_phys_addr;
struct sk_buff *skb;
bool reuse = false;
int rc = -EINVAL;
u8 *new_data;
opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]);
opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]);
DP_VERBOSE(p_hwfn,
(NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA),
"Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n",
(u64)p_pkt->rx_buf_addr, pad, packet_length,
le16_to_cpu(p_cqe->parse_flags.flags), vlan,
opaque_data_0, opaque_data_1);
if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) {
print_hex_dump(KERN_INFO, "",
DUMP_PREFIX_OFFSET, 16, 1,
buffer->data, packet_length, false);
}
/* Determine if data is valid */
if (packet_length < ETH_HLEN)
reuse = true;
/* Allocate a replacement for buffer; Reuse upon failure */
if (!reuse)
rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data,
&new_phys_addr);
/* If need to reuse or there's no replacement buffer, repost this */
if (rc)
goto out_post;
dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
cdev->ll2->rx_size, DMA_FROM_DEVICE);
skb = build_skb(buffer->data, 0);
if (!skb) {
rc = -ENOMEM;
goto out_post;
}
pad += NET_SKB_PAD;
skb_reserve(skb, pad);
skb_put(skb, packet_length);
skb_checksum_none_assert(skb);
/* Get parital ethernet information instead of eth_type_trans(),
* Since we don't have an associated net_device.
*/
skb_reset_mac_header(skb);
skb->protocol = eth_hdr(skb)->h_proto;
/* Pass SKB onward */
if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) {
if (vlan)
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb,
opaque_data_0, opaque_data_1);
}
/* Update Buffer information and update FW producer */
buffer->data = new_data;
buffer->phys_addr = new_phys_addr;
out_post:
rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle,
buffer->phys_addr, 0, buffer, 1);
if (rc)
qed_ll2_dealloc_buffer(cdev, buffer);
}
static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
u8 connection_handle,
bool b_lock,
bool b_only_active)
{
struct qed_ll2_info *p_ll2_conn, *p_ret = NULL;
if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS)
return NULL;
if (!p_hwfn->p_ll2_info)
return NULL;
p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
if (b_only_active) {
if (b_lock)
mutex_lock(&p_ll2_conn->mutex);
if (p_ll2_conn->b_active)
p_ret = p_ll2_conn;
if (b_lock)
mutex_unlock(&p_ll2_conn->mutex);
} else {
p_ret = p_ll2_conn;
}
return p_ret;
}
static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn,
u8 connection_handle)
{
return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true);
}
static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn,
u8 connection_handle)
{
return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true);
}
static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn
*p_hwfn,
u8 connection_handle)
{
return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false);
}
static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
{
bool b_last_packet = false, b_last_frag = false;
struct qed_ll2_tx_packet *p_pkt = NULL;
struct qed_ll2_info *p_ll2_conn;
struct qed_ll2_tx_queue *p_tx;
dma_addr_t tx_frag;
p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
if (!p_ll2_conn)
return;
p_tx = &p_ll2_conn->tx_queue;
while (!list_empty(&p_tx->active_descq)) {
p_pkt = list_first_entry(&p_tx->active_descq,
struct qed_ll2_tx_packet, list_entry);
if (!p_pkt)
break;
list_del(&p_pkt->list_entry);
b_last_packet = list_empty(&p_tx->active_descq);
list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
p_tx->cur_completing_packet = *p_pkt;
p_tx->cur_completing_bd_idx = 1;
b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
tx_frag = p_pkt->bds_set[0].tx_frag;
if (p_ll2_conn->gsi_enable)
qed_ll2b_release_tx_gsi_packet(p_hwfn,
p_ll2_conn->my_id,
p_pkt->cookie,
tx_frag,
b_last_frag,
b_last_packet);
else
qed_ll2b_complete_tx_packet(p_hwfn,
p_ll2_conn->my_id,
p_pkt->cookie,
tx_frag,
b_last_frag,
b_last_packet);
}
}
static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie)
{
struct qed_ll2_info *p_ll2_conn = p_cookie;
struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0;
struct qed_ll2_tx_packet *p_pkt;
bool b_last_frag = false;
unsigned long flags;
dma_addr_t tx_frag;
int rc = -EINVAL;
spin_lock_irqsave(&p_tx->lock, flags);
if (p_tx->b_completing_packet) {
rc = -EBUSY;
goto out;
}
new_idx = le16_to_cpu(*p_tx->p_fw_cons);
num_bds = ((s16)new_idx - (s16)p_tx->bds_idx);
while (num_bds) {
if (list_empty(&p_tx->active_descq))
goto out;
p_pkt = list_first_entry(&p_tx->active_descq,
struct qed_ll2_tx_packet, list_entry);
if (!p_pkt)
goto out;
p_tx->b_completing_packet = true;
p_tx->cur_completing_packet = *p_pkt;
num_bds_in_packet = p_pkt->bd_used;
list_del(&p_pkt->list_entry);
if (num_bds < num_bds_in_packet) {
DP_NOTICE(p_hwfn,
"Rest of BDs does not cover whole packet\n");
goto out;
}
num_bds -= num_bds_in_packet;
p_tx->bds_idx += num_bds_in_packet;
while (num_bds_in_packet--)
qed_chain_consume(&p_tx->txq_chain);
p_tx->cur_completing_bd_idx = 1;
b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used;
list_add_tail(&p_pkt->list_entry, &p_tx->free_descq);
spin_unlock_irqrestore(&p_tx->lock, flags);
tx_frag = p_pkt->bds_set[0].tx_frag;
if (p_ll2_conn->gsi_enable)
qed_ll2b_complete_tx_gsi_packet(p_hwfn,
p_ll2_conn->my_id,
p_pkt->cookie,
tx_frag,
b_last_frag, !num_bds);
else
qed_ll2b_complete_tx_packet(p_hwfn,
p_ll2_conn->my_id,
p_pkt->cookie,
tx_frag,
b_last_frag, !num_bds);
spin_lock_irqsave(&p_tx->lock, flags);
}
p_tx->b_completing_packet = false;
rc = 0;
out:
spin_unlock_irqrestore(&p_tx->lock, flags);
return rc;
}
static int
qed_ll2_rxq_completion_gsi(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_info,
union core_rx_cqe_union *p_cqe,
unsigned long lock_flags, bool b_last_cqe)
{
struct qed_ll2_rx_queue *p_rx = &p_ll2_info->rx_queue;
struct qed_ll2_rx_packet *p_pkt = NULL;
u16 packet_length, parse_flags, vlan;
u32 src_mac_addrhi;
u16 src_mac_addrlo;
if (!list_empty(&p_rx->active_descq))
p_pkt = list_first_entry(&p_rx->active_descq,
struct qed_ll2_rx_packet, list_entry);
if (!p_pkt) {
DP_NOTICE(p_hwfn,
"GSI Rx completion but active_descq is empty\n");
return -EIO;
}
list_del(&p_pkt->list_entry);
parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags);
packet_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length);
vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan);
src_mac_addrhi = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi);
src_mac_addrlo = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo);
if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
DP_NOTICE(p_hwfn,
"Mismatch between active_descq and the LL2 Rx chain\n");
list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
spin_unlock_irqrestore(&p_rx->lock, lock_flags);
qed_ll2b_complete_rx_gsi_packet(p_hwfn,
p_ll2_info->my_id,
p_pkt->cookie,
p_pkt->rx_buf_addr,
packet_length,
p_cqe->rx_cqe_gsi.data_length_error,
parse_flags,
vlan,
src_mac_addrhi,
src_mac_addrlo, b_last_cqe);
spin_lock_irqsave(&p_rx->lock, lock_flags);
return 0;
}
static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn,
union core_rx_cqe_union *p_cqe,
unsigned long *p_lock_flags,
bool b_last_cqe)
{
struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
struct qed_ll2_rx_packet *p_pkt = NULL;
if (!list_empty(&p_rx->active_descq))
p_pkt = list_first_entry(&p_rx->active_descq,
struct qed_ll2_rx_packet, list_entry);
if (!p_pkt) {
DP_NOTICE(p_hwfn,
"LL2 Rx completion but active_descq is empty\n");
return -EIO;
}
list_del(&p_pkt->list_entry);
if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd)
DP_NOTICE(p_hwfn,
"Mismatch between active_descq and the LL2 Rx chain\n");
list_add_tail(&p_pkt->list_entry, &p_rx->free_descq);
spin_unlock_irqrestore(&p_rx->lock, *p_lock_flags);
qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id,
p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe);
spin_lock_irqsave(&p_rx->lock, *p_lock_flags);
return 0;
}
static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie)
{
struct qed_ll2_info *p_ll2_conn = cookie;
struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
union core_rx_cqe_union *cqe = NULL;
u16 cq_new_idx = 0, cq_old_idx = 0;
unsigned long flags = 0;
int rc = 0;
spin_lock_irqsave(&p_rx->lock, flags);
cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons);
cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
while (cq_new_idx != cq_old_idx) {
bool b_last_cqe = (cq_new_idx == cq_old_idx);
cqe = qed_chain_consume(&p_rx->rcq_chain);
cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain);
DP_VERBOSE(p_hwfn,
QED_MSG_LL2,
"LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n",
cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type);
switch (cqe->rx_cqe_sp.type) {
case CORE_RX_CQE_TYPE_SLOW_PATH:
DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n");
rc = -EINVAL;
break;
case CORE_RX_CQE_TYPE_GSI_OFFLOAD:
rc = qed_ll2_rxq_completion_gsi(p_hwfn, p_ll2_conn,
cqe, flags, b_last_cqe);
break;
case CORE_RX_CQE_TYPE_REGULAR:
rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn,
cqe, &flags,
b_last_cqe);
break;
default:
rc = -EIO;
}
}
spin_unlock_irqrestore(&p_rx->lock, flags);
return rc;
}
static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle)
{
struct qed_ll2_info *p_ll2_conn = NULL;
struct qed_ll2_rx_packet *p_pkt = NULL;
struct qed_ll2_rx_queue *p_rx;
p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle);
if (!p_ll2_conn)
return;
p_rx = &p_ll2_conn->rx_queue;
while (!list_empty(&p_rx->active_descq)) {
dma_addr_t rx_buf_addr;
void *cookie;
bool b_last;
p_pkt = list_first_entry(&p_rx->active_descq,
struct qed_ll2_rx_packet, list_entry);
if (!p_pkt)
break;
list_move_tail(&p_pkt->list_entry, &p_rx->free_descq);
rx_buf_addr = p_pkt->rx_buf_addr;
cookie = p_pkt->cookie;
b_last = list_empty(&p_rx->active_descq);
}
}
static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn,
u8 action_on_error)
{
enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type;
struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue;
struct core_rx_start_ramrod_data *p_ramrod = NULL;
struct qed_spq_entry *p_ent = NULL;
struct qed_sp_init_data init_data;
u16 cqe_pbl_size;
int rc = 0;
/* Get SPQ entry */
memset(&init_data, 0, sizeof(init_data));
init_data.cid = p_ll2_conn->cid;
init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
rc = qed_sp_init_request(p_hwfn, &p_ent,
CORE_RAMROD_RX_QUEUE_START,
PROTOCOLID_CORE, &init_data);
if (rc)
return rc;
p_ramrod = &p_ent->ramrod.core_rx_queue_start;
p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
p_ramrod->sb_index = p_rx->rx_sb_index;
p_ramrod->complete_event_flg = 1;
p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu);
DMA_REGPAIR_LE(p_ramrod->bd_base,
p_rx->rxq_chain.p_phys_addr);
cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain);
p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size);
DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr,
qed_chain_get_pbl_phys(&p_rx->rcq_chain));
p_ramrod->drop_ttl0_flg = p_ll2_conn->rx_drop_ttl0_flg;
p_ramrod->inner_vlan_removal_en = p_ll2_conn->rx_vlan_removal_en;
p_ramrod->queue_id = p_ll2_conn->queue_id;
p_ramrod->main_func_queue = 1;
if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) &&
p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) {
p_ramrod->mf_si_bcast_accept_all = 1;
p_ramrod->mf_si_mcast_accept_all = 1;
} else {
p_ramrod->mf_si_bcast_accept_all = 0;
p_ramrod->mf_si_mcast_accept_all = 0;
}
p_ramrod->action_on_error.error_type = action_on_error;
p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable;
return qed_spq_post(p_hwfn, p_ent, NULL);
}
static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn)
{
enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type;
struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
struct core_tx_start_ramrod_data *p_ramrod = NULL;
struct qed_spq_entry *p_ent = NULL;
struct qed_sp_init_data init_data;
union qed_qm_pq_params pq_params;
u16 pq_id = 0, pbl_size;
int rc = -EINVAL;
if (!QED_LL2_TX_REGISTERED(p_ll2_conn))
return 0;
/* Get SPQ entry */
memset(&init_data, 0, sizeof(init_data));
init_data.cid = p_ll2_conn->cid;
init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
rc = qed_sp_init_request(p_hwfn, &p_ent,
CORE_RAMROD_TX_QUEUE_START,
PROTOCOLID_CORE, &init_data);
if (rc)
return rc;
p_ramrod = &p_ent->ramrod.core_tx_queue_start;
p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn));
p_ramrod->sb_index = p_tx->tx_sb_index;
p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu);
p_ll2_conn->tx_stats_en = 1;
p_ramrod->stats_en = p_ll2_conn->tx_stats_en;
p_ramrod->stats_id = p_ll2_conn->tx_stats_id;
DMA_REGPAIR_LE(p_ramrod->pbl_base_addr,
qed_chain_get_pbl_phys(&p_tx->txq_chain));
pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain);
p_ramrod->pbl_size = cpu_to_le16(pbl_size);
memset(&pq_params, 0, sizeof(pq_params));
pq_params.core.tc = p_ll2_conn->tx_tc;
pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params);
p_ramrod->qm_pq_id = cpu_to_le16(pq_id);
switch (conn_type) {
case QED_LL2_TYPE_ISCSI:
case QED_LL2_TYPE_ISCSI_OOO:
p_ramrod->conn_type = PROTOCOLID_ISCSI;
break;
case QED_LL2_TYPE_ROCE:
p_ramrod->conn_type = PROTOCOLID_ROCE;
break;
default:
p_ramrod->conn_type = PROTOCOLID_ETH;
DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type);
}
p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable;
return qed_spq_post(p_hwfn, p_ent, NULL);
}
static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn)
{
struct core_rx_stop_ramrod_data *p_ramrod = NULL;
struct qed_spq_entry *p_ent = NULL;
struct qed_sp_init_data init_data;
int rc = -EINVAL;
/* Get SPQ entry */
memset(&init_data, 0, sizeof(init_data));
init_data.cid = p_ll2_conn->cid;
init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
rc = qed_sp_init_request(p_hwfn, &p_ent,
CORE_RAMROD_RX_QUEUE_STOP,
PROTOCOLID_CORE, &init_data);
if (rc)
return rc;
p_ramrod = &p_ent->ramrod.core_rx_queue_stop;
p_ramrod->complete_event_flg = 1;
p_ramrod->queue_id = p_ll2_conn->queue_id;
return qed_spq_post(p_hwfn, p_ent, NULL);
}
static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn)
{
struct qed_spq_entry *p_ent = NULL;
struct qed_sp_init_data init_data;
int rc = -EINVAL;
/* Get SPQ entry */
memset(&init_data, 0, sizeof(init_data));
init_data.cid = p_ll2_conn->cid;
init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
init_data.comp_mode = QED_SPQ_MODE_EBLOCK;
rc = qed_sp_init_request(p_hwfn, &p_ent,
CORE_RAMROD_TX_QUEUE_STOP,
PROTOCOLID_CORE, &init_data);
if (rc)
return rc;
return qed_spq_post(p_hwfn, p_ent, NULL);
}
static int
qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_info, u16 rx_num_desc)
{
struct qed_ll2_rx_packet *p_descq;
u32 capacity;
int rc = 0;
if (!rx_num_desc)
goto out;
rc = qed_chain_alloc(p_hwfn->cdev,
QED_CHAIN_USE_TO_CONSUME_PRODUCE,
QED_CHAIN_MODE_NEXT_PTR,
QED_CHAIN_CNT_TYPE_U16,
rx_num_desc,
sizeof(struct core_rx_bd),
&p_ll2_info->rx_queue.rxq_chain);
if (rc) {
DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n");
goto out;
}
capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain);
p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet),
GFP_KERNEL);
if (!p_descq) {
rc = -ENOMEM;
DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n");
goto out;
}
p_ll2_info->rx_queue.descq_array = p_descq;
rc = qed_chain_alloc(p_hwfn->cdev,
QED_CHAIN_USE_TO_CONSUME_PRODUCE,
QED_CHAIN_MODE_PBL,
QED_CHAIN_CNT_TYPE_U16,
rx_num_desc,
sizeof(struct core_rx_fast_path_cqe),
&p_ll2_info->rx_queue.rcq_chain);
if (rc) {
DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n");
goto out;
}
DP_VERBOSE(p_hwfn, QED_MSG_LL2,
"Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n",
p_ll2_info->conn_type, rx_num_desc);
out:
return rc;
}
static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_info,
u16 tx_num_desc)
{
struct qed_ll2_tx_packet *p_descq;
u32 capacity;
int rc = 0;
if (!tx_num_desc)
goto out;
rc = qed_chain_alloc(p_hwfn->cdev,
QED_CHAIN_USE_TO_CONSUME_PRODUCE,
QED_CHAIN_MODE_PBL,
QED_CHAIN_CNT_TYPE_U16,
tx_num_desc,
sizeof(struct core_tx_bd),
&p_ll2_info->tx_queue.txq_chain);
if (rc)
goto out;
capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain);
p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet),
GFP_KERNEL);
if (!p_descq) {
rc = -ENOMEM;
goto out;
}
p_ll2_info->tx_queue.descq_array = p_descq;
DP_VERBOSE(p_hwfn, QED_MSG_LL2,
"Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n",
p_ll2_info->conn_type, tx_num_desc);
out:
if (rc)
DP_NOTICE(p_hwfn,
"Can't allocate memory for Tx LL2 with 0x%08x buffers\n",
tx_num_desc);
return rc;
}
int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_params,
u16 rx_num_desc,
u16 tx_num_desc,
u8 *p_connection_handle)
{
qed_int_comp_cb_t comp_rx_cb, comp_tx_cb;
struct qed_ll2_info *p_ll2_info = NULL;
int rc;
u8 i;
if (!p_connection_handle || !p_hwfn->p_ll2_info)
return -EINVAL;
/* Find a free connection to be used */
for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) {
mutex_lock(&p_hwfn->p_ll2_info[i].mutex);
if (p_hwfn->p_ll2_info[i].b_active) {
mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
continue;
}
p_hwfn->p_ll2_info[i].b_active = true;
p_ll2_info = &p_hwfn->p_ll2_info[i];
mutex_unlock(&p_hwfn->p_ll2_info[i].mutex);
break;
}
if (!p_ll2_info)
return -EBUSY;
p_ll2_info->conn_type = p_params->conn_type;
p_ll2_info->mtu = p_params->mtu;
p_ll2_info->rx_drop_ttl0_flg = p_params->rx_drop_ttl0_flg;
p_ll2_info->rx_vlan_removal_en = p_params->rx_vlan_removal_en;
p_ll2_info->tx_tc = p_params->tx_tc;
p_ll2_info->tx_dest = p_params->tx_dest;
p_ll2_info->ai_err_packet_too_big = p_params->ai_err_packet_too_big;
p_ll2_info->ai_err_no_buf = p_params->ai_err_no_buf;
p_ll2_info->gsi_enable = p_params->gsi_enable;
rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info, rx_num_desc);
if (rc)
goto q_allocate_fail;
rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info, tx_num_desc);
if (rc)
goto q_allocate_fail;
/* Register callbacks for the Rx/Tx queues */
comp_rx_cb = qed_ll2_rxq_completion;
comp_tx_cb = qed_ll2_txq_completion;
if (rx_num_desc) {
qed_int_register_cb(p_hwfn, comp_rx_cb,
&p_hwfn->p_ll2_info[i],
&p_ll2_info->rx_queue.rx_sb_index,
&p_ll2_info->rx_queue.p_fw_cons);
p_ll2_info->rx_queue.b_cb_registred = true;
}
if (tx_num_desc) {
qed_int_register_cb(p_hwfn,
comp_tx_cb,
&p_hwfn->p_ll2_info[i],
&p_ll2_info->tx_queue.tx_sb_index,
&p_ll2_info->tx_queue.p_fw_cons);
p_ll2_info->tx_queue.b_cb_registred = true;
}
*p_connection_handle = i;
return rc;
q_allocate_fail:
qed_ll2_release_connection(p_hwfn, i);
return -ENOMEM;
}
static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn)
{
u8 action_on_error = 0;
if (!QED_LL2_RX_REGISTERED(p_ll2_conn))
return 0;
DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0);
SET_FIELD(action_on_error,
CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG,
p_ll2_conn->ai_err_packet_too_big);
SET_FIELD(action_on_error,
CORE_RX_ACTION_ON_ERROR_NO_BUFF, p_ll2_conn->ai_err_no_buf);
return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error);
}
int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
{
struct qed_ll2_info *p_ll2_conn;
struct qed_ll2_rx_queue *p_rx;
struct qed_ll2_tx_queue *p_tx;
int rc = -EINVAL;
u32 i, capacity;
u8 qid;
p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
if (!p_ll2_conn)
return -EINVAL;
p_rx = &p_ll2_conn->rx_queue;
p_tx = &p_ll2_conn->tx_queue;
qed_chain_reset(&p_rx->rxq_chain);
qed_chain_reset(&p_rx->rcq_chain);
INIT_LIST_HEAD(&p_rx->active_descq);
INIT_LIST_HEAD(&p_rx->free_descq);
INIT_LIST_HEAD(&p_rx->posting_descq);
spin_lock_init(&p_rx->lock);
capacity = qed_chain_get_capacity(&p_rx->rxq_chain);
for (i = 0; i < capacity; i++)
list_add_tail(&p_rx->descq_array[i].list_entry,
&p_rx->free_descq);
*p_rx->p_fw_cons = 0;
qed_chain_reset(&p_tx->txq_chain);
INIT_LIST_HEAD(&p_tx->active_descq);
INIT_LIST_HEAD(&p_tx->free_descq);
INIT_LIST_HEAD(&p_tx->sending_descq);
spin_lock_init(&p_tx->lock);
capacity = qed_chain_get_capacity(&p_tx->txq_chain);
for (i = 0; i < capacity; i++)
list_add_tail(&p_tx->descq_array[i].list_entry,
&p_tx->free_descq);
p_tx->cur_completing_bd_idx = 0;
p_tx->bds_idx = 0;
p_tx->b_completing_packet = false;
p_tx->cur_send_packet = NULL;
p_tx->cur_send_frag_num = 0;
p_tx->cur_completing_frag_num = 0;
*p_tx->p_fw_cons = 0;
qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid);
qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle;
p_ll2_conn->queue_id = qid;
p_ll2_conn->tx_stats_id = qid;
p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview +
GTT_BAR0_MAP_REG_TSDM_RAM +
TSTORM_LL2_RX_PRODS_OFFSET(qid);
p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells +
qed_db_addr(p_ll2_conn->cid,
DQ_DEMS_LEGACY);
rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn);
if (rc)
return rc;
rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn);
if (rc)
return rc;
if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE)
qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1);
return rc;
}
static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn,
struct qed_ll2_rx_queue *p_rx,
struct qed_ll2_rx_packet *p_curp)
{
struct qed_ll2_rx_packet *p_posting_packet = NULL;
struct core_ll2_rx_prod rx_prod = { 0, 0, 0 };
bool b_notify_fw = false;
u16 bd_prod, cq_prod;
/* This handles the flushing of already posted buffers */
while (!list_empty(&p_rx->posting_descq)) {
p_posting_packet = list_first_entry(&p_rx->posting_descq,
struct qed_ll2_rx_packet,
list_entry);
list_move_tail(&p_posting_packet->list_entry,
&p_rx->active_descq);
b_notify_fw = true;
}
/* This handles the supplied packet [if there is one] */
if (p_curp) {
list_add_tail(&p_curp->list_entry, &p_rx->active_descq);
b_notify_fw = true;
}
if (!b_notify_fw)
return;
bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain);
cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain);
rx_prod.bd_prod = cpu_to_le16(bd_prod);
rx_prod.cqe_prod = cpu_to_le16(cq_prod);
/* Make sure chain element is updated before ringing the doorbell */
dma_wmb();
DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod));
}
int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn,
u8 connection_handle,
dma_addr_t addr,
u16 buf_len, void *cookie, u8 notify_fw)
{
struct core_rx_bd_with_buff_len *p_curb = NULL;
struct qed_ll2_rx_packet *p_curp = NULL;
struct qed_ll2_info *p_ll2_conn;
struct qed_ll2_rx_queue *p_rx;
unsigned long flags;
void *p_data;
int rc = 0;
p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
if (!p_ll2_conn)
return -EINVAL;
p_rx = &p_ll2_conn->rx_queue;
spin_lock_irqsave(&p_rx->lock, flags);
if (!list_empty(&p_rx->free_descq))
p_curp = list_first_entry(&p_rx->free_descq,
struct qed_ll2_rx_packet, list_entry);
if (p_curp) {
if (qed_chain_get_elem_left(&p_rx->rxq_chain) &&
qed_chain_get_elem_left(&p_rx->rcq_chain)) {
p_data = qed_chain_produce(&p_rx->rxq_chain);
p_curb = (struct core_rx_bd_with_buff_len *)p_data;
qed_chain_produce(&p_rx->rcq_chain);
}
}
/* If we're lacking entires, let's try to flush buffers to FW */
if (!p_curp || !p_curb) {
rc = -EBUSY;
p_curp = NULL;
goto out_notify;
}
/* We have an Rx packet we can fill */
DMA_REGPAIR_LE(p_curb->addr, addr);
p_curb->buff_length = cpu_to_le16(buf_len);
p_curp->rx_buf_addr = addr;
p_curp->cookie = cookie;
p_curp->rxq_bd = p_curb;
p_curp->buf_length = buf_len;
list_del(&p_curp->list_entry);
/* Check if we only want to enqueue this packet without informing FW */
if (!notify_fw) {
list_add_tail(&p_curp->list_entry, &p_rx->posting_descq);
goto out;
}
out_notify:
qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp);
out:
spin_unlock_irqrestore(&p_rx->lock, flags);
return rc;
}
static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn,
struct qed_ll2_tx_queue *p_tx,
struct qed_ll2_tx_packet *p_curp,
u8 num_of_bds,
dma_addr_t first_frag,
u16 first_frag_len, void *p_cookie,
u8 notify_fw)
{
list_del(&p_curp->list_entry);
p_curp->cookie = p_cookie;
p_curp->bd_used = num_of_bds;
p_curp->notify_fw = notify_fw;
p_tx->cur_send_packet = p_curp;
p_tx->cur_send_frag_num = 0;
p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag;
p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len;
p_tx->cur_send_frag_num++;
}
static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2,
struct qed_ll2_tx_packet *p_curp,
u8 num_of_bds,
enum core_tx_dest tx_dest,
u16 vlan,
u8 bd_flags,
u16 l4_hdr_offset_w,
enum core_roce_flavor_type type,
dma_addr_t first_frag,
u16 first_frag_len)
{
struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain;
u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain);
struct core_tx_bd *start_bd = NULL;
u16 frag_idx;
start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan);
SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W,
cpu_to_le16(l4_hdr_offset_w));
SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest);
start_bd->bd_flags.as_bitfield = bd_flags;
start_bd->bd_flags.as_bitfield |= CORE_TX_BD_FLAGS_START_BD_MASK <<
CORE_TX_BD_FLAGS_START_BD_SHIFT;
SET_FIELD(start_bd->bitfield0, CORE_TX_BD_NBDS, num_of_bds);
SET_FIELD(start_bd->bitfield0, CORE_TX_BD_ROCE_FLAV, type);
DMA_REGPAIR_LE(start_bd->addr, first_frag);
start_bd->nbytes = cpu_to_le16(first_frag_len);
DP_VERBOSE(p_hwfn,
(NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
"LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n",
p_ll2->queue_id,
p_ll2->cid,
p_ll2->conn_type,
prod_idx,
first_frag_len,
num_of_bds,
le32_to_cpu(start_bd->addr.hi),
le32_to_cpu(start_bd->addr.lo));
if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds)
return;
/* Need to provide the packet with additional BDs for frags */
for (frag_idx = p_ll2->tx_queue.cur_send_frag_num;
frag_idx < num_of_bds; frag_idx++) {
struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd;
*p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain);
(*p_bd)->bd_flags.as_bitfield = 0;
(*p_bd)->bitfield1 = 0;
(*p_bd)->bitfield0 = 0;
p_curp->bds_set[frag_idx].tx_frag = 0;
p_curp->bds_set[frag_idx].frag_len = 0;
}
}
/* This should be called while the Txq spinlock is being held */
static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_conn)
{
bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw;
struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue;
struct qed_ll2_tx_packet *p_pkt = NULL;
struct core_db_data db_msg = { 0, 0, 0 };
u16 bd_prod;
/* If there are missing BDs, don't do anything now */
if (p_ll2_conn->tx_queue.cur_send_frag_num !=
p_ll2_conn->tx_queue.cur_send_packet->bd_used)
return;
/* Push the current packet to the list and clean after it */
list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry,
&p_ll2_conn->tx_queue.sending_descq);
p_ll2_conn->tx_queue.cur_send_packet = NULL;
p_ll2_conn->tx_queue.cur_send_frag_num = 0;
/* Notify FW of packet only if requested to */
if (!b_notify)
return;
bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain);
while (!list_empty(&p_tx->sending_descq)) {
p_pkt = list_first_entry(&p_tx->sending_descq,
struct qed_ll2_tx_packet, list_entry);
if (!p_pkt)
break;
list_move_tail(&p_pkt->list_entry, &p_tx->active_descq);
}
SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM);
SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET);
SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL,
DQ_XCM_CORE_TX_BD_PROD_CMD);
db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD;
db_msg.spq_prod = cpu_to_le16(bd_prod);
/* Make sure the BDs data is updated before ringing the doorbell */
wmb();
DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg));
DP_VERBOSE(p_hwfn,
(NETIF_MSG_TX_QUEUED | QED_MSG_LL2),
"LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n",
p_ll2_conn->queue_id,
p_ll2_conn->cid, p_ll2_conn->conn_type, db_msg.spq_prod);
}
int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn,
u8 connection_handle,
u8 num_of_bds,
u16 vlan,
u8 bd_flags,
u16 l4_hdr_offset_w,
enum qed_ll2_roce_flavor_type qed_roce_flavor,
dma_addr_t first_frag,
u16 first_frag_len, void *cookie, u8 notify_fw)
{
struct qed_ll2_tx_packet *p_curp = NULL;
struct qed_ll2_info *p_ll2_conn = NULL;
enum core_roce_flavor_type roce_flavor;
struct qed_ll2_tx_queue *p_tx;
struct qed_chain *p_tx_chain;
unsigned long flags;
int rc = 0;
p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
if (!p_ll2_conn)
return -EINVAL;
p_tx = &p_ll2_conn->tx_queue;
p_tx_chain = &p_tx->txq_chain;
if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET)
return -EIO;
spin_lock_irqsave(&p_tx->lock, flags);
if (p_tx->cur_send_packet) {
rc = -EEXIST;
goto out;
}
/* Get entry, but only if we have tx elements for it */
if (!list_empty(&p_tx->free_descq))
p_curp = list_first_entry(&p_tx->free_descq,
struct qed_ll2_tx_packet, list_entry);
if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds)
p_curp = NULL;
if (!p_curp) {
rc = -EBUSY;
goto out;
}
if (qed_roce_flavor == QED_LL2_ROCE) {
roce_flavor = CORE_ROCE;
} else if (qed_roce_flavor == QED_LL2_RROCE) {
roce_flavor = CORE_RROCE;
} else {
rc = -EINVAL;
goto out;
}
/* Prepare packet and BD, and perhaps send a doorbell to FW */
qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp,
num_of_bds, first_frag,
first_frag_len, cookie, notify_fw);
qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp,
num_of_bds, CORE_TX_DEST_NW,
vlan, bd_flags, l4_hdr_offset_w,
roce_flavor,
first_frag, first_frag_len);
qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
out:
spin_unlock_irqrestore(&p_tx->lock, flags);
return rc;
}
int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn,
u8 connection_handle,
dma_addr_t addr, u16 nbytes)
{
struct qed_ll2_tx_packet *p_cur_send_packet = NULL;
struct qed_ll2_info *p_ll2_conn = NULL;
u16 cur_send_frag_num = 0;
struct core_tx_bd *p_bd;
unsigned long flags;
p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
if (!p_ll2_conn)
return -EINVAL;
if (!p_ll2_conn->tx_queue.cur_send_packet)
return -EINVAL;
p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet;
cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num;
if (cur_send_frag_num >= p_cur_send_packet->bd_used)
return -EINVAL;
/* Fill the BD information, and possibly notify FW */
p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd;
DMA_REGPAIR_LE(p_bd->addr, addr);
p_bd->nbytes = cpu_to_le16(nbytes);
p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr;
p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes;
p_ll2_conn->tx_queue.cur_send_frag_num++;
spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags);
qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn);
spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags);
return 0;
}
int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
{
struct qed_ll2_info *p_ll2_conn = NULL;
int rc = -EINVAL;
p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle);
if (!p_ll2_conn)
return -EINVAL;
/* Stop Tx & Rx of connection, if needed */
if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn);
if (rc)
return rc;
qed_ll2_txq_flush(p_hwfn, connection_handle);
}
if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn);
if (rc)
return rc;
qed_ll2_rxq_flush(p_hwfn, connection_handle);
}
return rc;
}
void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle)
{
struct qed_ll2_info *p_ll2_conn = NULL;
p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle);
if (!p_ll2_conn)
return;
if (QED_LL2_RX_REGISTERED(p_ll2_conn)) {
p_ll2_conn->rx_queue.b_cb_registred = false;
qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index);
}
if (QED_LL2_TX_REGISTERED(p_ll2_conn)) {
p_ll2_conn->tx_queue.b_cb_registred = false;
qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index);
}
kfree(p_ll2_conn->tx_queue.descq_array);
qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain);
kfree(p_ll2_conn->rx_queue.descq_array);
qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain);
qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain);
qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid);
mutex_lock(&p_ll2_conn->mutex);
p_ll2_conn->b_active = false;
mutex_unlock(&p_ll2_conn->mutex);
}
struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn)
{
struct qed_ll2_info *p_ll2_connections;
u8 i;
/* Allocate LL2's set struct */
p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS,
sizeof(struct qed_ll2_info), GFP_KERNEL);
if (!p_ll2_connections) {
DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n");
return NULL;
}
for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
p_ll2_connections[i].my_id = i;
return p_ll2_connections;
}
void qed_ll2_setup(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_connections)
{
int i;
for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++)
mutex_init(&p_ll2_connections[i].mutex);
}
void qed_ll2_free(struct qed_hwfn *p_hwfn,
struct qed_ll2_info *p_ll2_connections)
{
kfree(p_ll2_connections);
}
static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
struct qed_ll2_info *p_ll2_conn,
struct qed_ll2_stats *p_stats)
{
struct core_ll2_tstorm_per_queue_stat tstats;
u8 qid = p_ll2_conn->queue_id;
u32 tstats_addr;
memset(&tstats, 0, sizeof(tstats));
tstats_addr = BAR0_MAP_REG_TSDM_RAM +
CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid);
qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
p_stats->packet_too_big_discard =
HILO_64_REGPAIR(tstats.packet_too_big_discard);
p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard);
}
static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
struct qed_ll2_info *p_ll2_conn,
struct qed_ll2_stats *p_stats)
{
struct core_ll2_ustorm_per_queue_stat ustats;
u8 qid = p_ll2_conn->queue_id;
u32 ustats_addr;
memset(&ustats, 0, sizeof(ustats));
ustats_addr = BAR0_MAP_REG_USDM_RAM +
CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid);
qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes);
p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes);
p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes);
p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts);
p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts);
p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts);
}
static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn,
struct qed_ptt *p_ptt,
struct qed_ll2_info *p_ll2_conn,
struct qed_ll2_stats *p_stats)
{
struct core_ll2_pstorm_per_queue_stat pstats;
u8 stats_id = p_ll2_conn->tx_stats_id;
u32 pstats_addr;
memset(&pstats, 0, sizeof(pstats));
pstats_addr = BAR0_MAP_REG_PSDM_RAM +
CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id);
qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes);
p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes);
p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes);
p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts);
p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts);
p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts);
}
int qed_ll2_get_stats(struct qed_hwfn *p_hwfn,
u8 connection_handle, struct qed_ll2_stats *p_stats)
{
struct qed_ll2_info *p_ll2_conn = NULL;
struct qed_ptt *p_ptt;
memset(p_stats, 0, sizeof(*p_stats));
if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) ||
!p_hwfn->p_ll2_info)
return -EINVAL;
p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle];
p_ptt = qed_ptt_acquire(p_hwfn);
if (!p_ptt) {
DP_ERR(p_hwfn, "Failed to acquire ptt\n");
return -EINVAL;
}
_qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
_qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
if (p_ll2_conn->tx_stats_en)
_qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats);
qed_ptt_release(p_hwfn, p_ptt);
return 0;
}
static void qed_ll2_register_cb_ops(struct qed_dev *cdev,
const struct qed_ll2_cb_ops *ops,
void *cookie)
{
cdev->ll2->cbs = ops;
cdev->ll2->cb_cookie = cookie;
}
static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params)
{
struct qed_ll2_info ll2_info;
struct qed_ll2_buffer *buffer, *tmp_buffer;
enum qed_ll2_conn_type conn_type;
struct qed_ptt *p_ptt;
int rc, i;
/* Initialize LL2 locks & lists */
INIT_LIST_HEAD(&cdev->ll2->list);
spin_lock_init(&cdev->ll2->lock);
cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN +
L1_CACHE_BYTES + params->mtu;
cdev->ll2->frags_mapped = params->frags_mapped;
/*Allocate memory for LL2 */
DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n",
cdev->ll2->rx_size);
for (i = 0; i < QED_LL2_RX_SIZE; i++) {
buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
if (!buffer) {
DP_INFO(cdev, "Failed to allocate LL2 buffers\n");
goto fail;
}
rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data,
&buffer->phys_addr);
if (rc) {
kfree(buffer);
goto fail;
}
list_add_tail(&buffer->list, &cdev->ll2->list);
}
switch (QED_LEADING_HWFN(cdev)->hw_info.personality) {
case QED_PCI_ISCSI:
conn_type = QED_LL2_TYPE_ISCSI;
break;
case QED_PCI_ETH_ROCE:
conn_type = QED_LL2_TYPE_ROCE;
break;
default:
conn_type = QED_LL2_TYPE_TEST;
}
/* Prepare the temporary ll2 information */
memset(&ll2_info, 0, sizeof(ll2_info));
ll2_info.conn_type = conn_type;
ll2_info.mtu = params->mtu;
ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets;
ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping;
ll2_info.tx_tc = 0;
ll2_info.tx_dest = CORE_TX_DEST_NW;
ll2_info.gsi_enable = 1;
rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info,
QED_LL2_RX_SIZE, QED_LL2_TX_SIZE,
&cdev->ll2->handle);
if (rc) {
DP_INFO(cdev, "Failed to acquire LL2 connection\n");
goto fail;
}
rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev),
cdev->ll2->handle);
if (rc) {
DP_INFO(cdev, "Failed to establish LL2 connection\n");
goto release_fail;
}
/* Post all Rx buffers to FW */
spin_lock_bh(&cdev->ll2->lock);
list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) {
rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev),
cdev->ll2->handle,
buffer->phys_addr, 0, buffer, 1);
if (rc) {
DP_INFO(cdev,
"Failed to post an Rx buffer; Deleting it\n");
dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr,
cdev->ll2->rx_size, DMA_FROM_DEVICE);
kfree(buffer->data);
list_del(&buffer->list);
kfree(buffer);
} else {
cdev->ll2->rx_cnt++;
}
}
spin_unlock_bh(&cdev->ll2->lock);
if (!cdev->ll2->rx_cnt) {
DP_INFO(cdev, "Failed passing even a single Rx buffer\n");
goto release_terminate;
}
if (!is_valid_ether_addr(params->ll2_mac_address)) {
DP_INFO(cdev, "Invalid Ethernet address\n");
goto release_terminate;
}
p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
if (!p_ptt) {
DP_INFO(cdev, "Failed to acquire PTT\n");
goto release_terminate;
}
rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
params->ll2_mac_address);
qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
if (rc) {
DP_ERR(cdev, "Failed to allocate LLH filter\n");
goto release_terminate_all;
}
ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address);
return 0;
release_terminate_all:
release_terminate:
qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
release_fail:
qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
fail:
qed_ll2_kill_buffers(cdev);
cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
return -EINVAL;
}
static int qed_ll2_stop(struct qed_dev *cdev)
{
struct qed_ptt *p_ptt;
int rc;
if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE)
return 0;
p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev));
if (!p_ptt) {
DP_INFO(cdev, "Failed to acquire PTT\n");
goto fail;
}
qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt,
cdev->ll2_mac_address);
qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt);
eth_zero_addr(cdev->ll2_mac_address);
rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev),
cdev->ll2->handle);
if (rc)
DP_INFO(cdev, "Failed to terminate LL2 connection\n");
qed_ll2_kill_buffers(cdev);
qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle);
cdev->ll2->handle = QED_LL2_UNUSED_HANDLE;
return rc;
fail:
return -EINVAL;
}
static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb)
{
const skb_frag_t *frag;
int rc = -EINVAL, i;
dma_addr_t mapping;
u16 vlan = 0;
u8 flags = 0;
if (unlikely(skb->ip_summed != CHECKSUM_NONE)) {
DP_INFO(cdev, "Cannot transmit a checksumed packet\n");
return -EINVAL;
}
if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) {
DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n",
1 + skb_shinfo(skb)->nr_frags);
return -EINVAL;
}
mapping = dma_map_single(&cdev->pdev->dev, skb->data,
skb->len, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) {
DP_NOTICE(cdev, "SKB mapping failed\n");
return -EINVAL;
}
/* Request HW to calculate IP csum */
if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) &&
ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6))
flags |= BIT(CORE_TX_BD_FLAGS_IP_CSUM_SHIFT);
if (skb_vlan_tag_present(skb)) {
vlan = skb_vlan_tag_get(skb);
flags |= BIT(CORE_TX_BD_FLAGS_VLAN_INSERTION_SHIFT);
}
rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev),
cdev->ll2->handle,
1 + skb_shinfo(skb)->nr_frags,
vlan, flags, 0, 0 /* RoCE FLAVOR */,
mapping, skb->len, skb, 1);
if (rc)
goto err;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
frag = &skb_shinfo(skb)->frags[i];
if (!cdev->ll2->frags_mapped) {
mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0,
skb_frag_size(frag),
DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(&cdev->pdev->dev,
mapping))) {
DP_NOTICE(cdev,
"Unable to map frag - dropping packet\n");
rc = -ENOMEM;
goto err;
}
} else {
mapping = page_to_phys(skb_frag_page(frag)) |
frag->page_offset;
}
rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev),
cdev->ll2->handle,
mapping,
skb_frag_size(frag));
/* if failed not much to do here, partial packet has been posted
* we can't free memory, will need to wait for completion.
*/
if (rc)
goto err2;
}
return 0;
err:
dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE);
err2:
return rc;
}
static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats)
{
if (!cdev->ll2)
return -EINVAL;
return qed_ll2_get_stats(QED_LEADING_HWFN(cdev),
cdev->ll2->handle, stats);
}
const struct qed_ll2_ops qed_ll2_ops_pass = {
.start = &qed_ll2_start,
.stop = &qed_ll2_stop,
.start_xmit = &qed_ll2_start_xmit,
.register_cb_ops = &qed_ll2_register_cb_ops,
.get_stats = &qed_ll2_stats,
};
int qed_ll2_alloc_if(struct qed_dev *cdev)
{
cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL);
return cdev->ll2 ? 0 : -ENOMEM;
}
void qed_ll2_dealloc_if(struct qed_dev *cdev)
{
kfree(cdev->ll2);
cdev->ll2 = NULL;
}
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