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linux-zen-desktop/drivers/net/ethernet/mellanox/mlxsw/pci.c

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Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/export.h>
#include <linux/err.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <linux/log2.h>
#include <linux/string.h>
#include "pci_hw.h"
#include "pci.h"
#include "core.h"
#include "cmd.h"
#include "port.h"
#include "resources.h"
#define mlxsw_pci_write32(mlxsw_pci, reg, val) \
iowrite32be(val, (mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
#define mlxsw_pci_read32(mlxsw_pci, reg) \
ioread32be((mlxsw_pci)->hw_addr + (MLXSW_PCI_ ## reg))
enum mlxsw_pci_queue_type {
MLXSW_PCI_QUEUE_TYPE_SDQ,
MLXSW_PCI_QUEUE_TYPE_RDQ,
MLXSW_PCI_QUEUE_TYPE_CQ,
MLXSW_PCI_QUEUE_TYPE_EQ,
};
#define MLXSW_PCI_QUEUE_TYPE_COUNT 4
static const u16 mlxsw_pci_doorbell_type_offset[] = {
MLXSW_PCI_DOORBELL_SDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_SDQ */
MLXSW_PCI_DOORBELL_RDQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_RDQ */
MLXSW_PCI_DOORBELL_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
MLXSW_PCI_DOORBELL_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
};
static const u16 mlxsw_pci_doorbell_arm_type_offset[] = {
0, /* unused */
0, /* unused */
MLXSW_PCI_DOORBELL_ARM_CQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_CQ */
MLXSW_PCI_DOORBELL_ARM_EQ_OFFSET, /* for type MLXSW_PCI_QUEUE_TYPE_EQ */
};
struct mlxsw_pci_mem_item {
char *buf;
dma_addr_t mapaddr;
size_t size;
};
struct mlxsw_pci_queue_elem_info {
char *elem; /* pointer to actual dma mapped element mem chunk */
union {
struct {
struct sk_buff *skb;
} sdq;
struct {
struct sk_buff *skb;
} rdq;
} u;
};
struct mlxsw_pci_queue {
spinlock_t lock; /* for queue accesses */
struct mlxsw_pci_mem_item mem_item;
struct mlxsw_pci_queue_elem_info *elem_info;
u16 producer_counter;
u16 consumer_counter;
u16 count; /* number of elements in queue */
u8 num; /* queue number */
u8 elem_size; /* size of one element */
enum mlxsw_pci_queue_type type;
struct tasklet_struct tasklet; /* queue processing tasklet */
struct mlxsw_pci *pci;
union {
struct {
u32 comp_sdq_count;
u32 comp_rdq_count;
enum mlxsw_pci_cqe_v v;
} cq;
struct {
u32 ev_cmd_count;
u32 ev_comp_count;
u32 ev_other_count;
} eq;
} u;
};
struct mlxsw_pci_queue_type_group {
struct mlxsw_pci_queue *q;
u8 count; /* number of queues in group */
};
struct mlxsw_pci {
struct pci_dev *pdev;
u8 __iomem *hw_addr;
u64 free_running_clock_offset;
u64 utc_sec_offset;
u64 utc_nsec_offset;
struct mlxsw_pci_queue_type_group queues[MLXSW_PCI_QUEUE_TYPE_COUNT];
u32 doorbell_offset;
struct mlxsw_core *core;
struct {
struct mlxsw_pci_mem_item *items;
unsigned int count;
} fw_area;
struct {
struct mlxsw_pci_mem_item out_mbox;
struct mlxsw_pci_mem_item in_mbox;
struct mutex lock; /* Lock access to command registers */
bool nopoll;
wait_queue_head_t wait;
bool wait_done;
struct {
u8 status;
u64 out_param;
} comp;
} cmd;
struct mlxsw_bus_info bus_info;
const struct pci_device_id *id;
enum mlxsw_pci_cqe_v max_cqe_ver; /* Maximal supported CQE version */
u8 num_sdq_cqs; /* Number of CQs used for SDQs */
};
static void mlxsw_pci_queue_tasklet_schedule(struct mlxsw_pci_queue *q)
{
tasklet_schedule(&q->tasklet);
}
static char *__mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q,
size_t elem_size, int elem_index)
{
return q->mem_item.buf + (elem_size * elem_index);
}
static struct mlxsw_pci_queue_elem_info *
mlxsw_pci_queue_elem_info_get(struct mlxsw_pci_queue *q, int elem_index)
{
return &q->elem_info[elem_index];
}
static struct mlxsw_pci_queue_elem_info *
mlxsw_pci_queue_elem_info_producer_get(struct mlxsw_pci_queue *q)
{
int index = q->producer_counter & (q->count - 1);
if ((u16) (q->producer_counter - q->consumer_counter) == q->count)
return NULL;
return mlxsw_pci_queue_elem_info_get(q, index);
}
static struct mlxsw_pci_queue_elem_info *
mlxsw_pci_queue_elem_info_consumer_get(struct mlxsw_pci_queue *q)
{
int index = q->consumer_counter & (q->count - 1);
return mlxsw_pci_queue_elem_info_get(q, index);
}
static char *mlxsw_pci_queue_elem_get(struct mlxsw_pci_queue *q, int elem_index)
{
return mlxsw_pci_queue_elem_info_get(q, elem_index)->elem;
}
static bool mlxsw_pci_elem_hw_owned(struct mlxsw_pci_queue *q, bool owner_bit)
{
return owner_bit != !!(q->consumer_counter & q->count);
}
static struct mlxsw_pci_queue_type_group *
mlxsw_pci_queue_type_group_get(struct mlxsw_pci *mlxsw_pci,
enum mlxsw_pci_queue_type q_type)
{
return &mlxsw_pci->queues[q_type];
}
static u8 __mlxsw_pci_queue_count(struct mlxsw_pci *mlxsw_pci,
enum mlxsw_pci_queue_type q_type)
{
struct mlxsw_pci_queue_type_group *queue_group;
queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_type);
return queue_group->count;
}
static u8 mlxsw_pci_sdq_count(struct mlxsw_pci *mlxsw_pci)
{
return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_SDQ);
}
static u8 mlxsw_pci_cq_count(struct mlxsw_pci *mlxsw_pci)
{
return __mlxsw_pci_queue_count(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ);
}
static struct mlxsw_pci_queue *
__mlxsw_pci_queue_get(struct mlxsw_pci *mlxsw_pci,
enum mlxsw_pci_queue_type q_type, u8 q_num)
{
return &mlxsw_pci->queues[q_type].q[q_num];
}
static struct mlxsw_pci_queue *mlxsw_pci_sdq_get(struct mlxsw_pci *mlxsw_pci,
u8 q_num)
{
return __mlxsw_pci_queue_get(mlxsw_pci,
MLXSW_PCI_QUEUE_TYPE_SDQ, q_num);
}
static struct mlxsw_pci_queue *mlxsw_pci_rdq_get(struct mlxsw_pci *mlxsw_pci,
u8 q_num)
{
return __mlxsw_pci_queue_get(mlxsw_pci,
MLXSW_PCI_QUEUE_TYPE_RDQ, q_num);
}
static struct mlxsw_pci_queue *mlxsw_pci_cq_get(struct mlxsw_pci *mlxsw_pci,
u8 q_num)
{
return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_CQ, q_num);
}
static struct mlxsw_pci_queue *mlxsw_pci_eq_get(struct mlxsw_pci *mlxsw_pci,
u8 q_num)
{
return __mlxsw_pci_queue_get(mlxsw_pci, MLXSW_PCI_QUEUE_TYPE_EQ, q_num);
}
static void __mlxsw_pci_queue_doorbell_set(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q,
u16 val)
{
mlxsw_pci_write32(mlxsw_pci,
DOORBELL(mlxsw_pci->doorbell_offset,
mlxsw_pci_doorbell_type_offset[q->type],
q->num), val);
}
static void __mlxsw_pci_queue_doorbell_arm_set(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q,
u16 val)
{
mlxsw_pci_write32(mlxsw_pci,
DOORBELL(mlxsw_pci->doorbell_offset,
mlxsw_pci_doorbell_arm_type_offset[q->type],
q->num), val);
}
static void mlxsw_pci_queue_doorbell_producer_ring(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
wmb(); /* ensure all writes are done before we ring a bell */
__mlxsw_pci_queue_doorbell_set(mlxsw_pci, q, q->producer_counter);
}
static void mlxsw_pci_queue_doorbell_consumer_ring(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
wmb(); /* ensure all writes are done before we ring a bell */
__mlxsw_pci_queue_doorbell_set(mlxsw_pci, q,
q->consumer_counter + q->count);
}
static void
mlxsw_pci_queue_doorbell_arm_consumer_ring(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
wmb(); /* ensure all writes are done before we ring a bell */
__mlxsw_pci_queue_doorbell_arm_set(mlxsw_pci, q, q->consumer_counter);
}
static dma_addr_t __mlxsw_pci_queue_page_get(struct mlxsw_pci_queue *q,
int page_index)
{
return q->mem_item.mapaddr + MLXSW_PCI_PAGE_SIZE * page_index;
}
static int mlxsw_pci_sdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
struct mlxsw_pci_queue *q)
{
int tclass;
int lp;
int i;
int err;
q->producer_counter = 0;
q->consumer_counter = 0;
tclass = q->num == MLXSW_PCI_SDQ_EMAD_INDEX ? MLXSW_PCI_SDQ_EMAD_TC :
MLXSW_PCI_SDQ_CTL_TC;
lp = q->num == MLXSW_PCI_SDQ_EMAD_INDEX ? MLXSW_CMD_MBOX_SW2HW_DQ_SDQ_LP_IGNORE_WQE :
MLXSW_CMD_MBOX_SW2HW_DQ_SDQ_LP_WQE;
/* Set CQ of same number of this SDQ. */
mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, q->num);
mlxsw_cmd_mbox_sw2hw_dq_sdq_lp_set(mbox, lp);
mlxsw_cmd_mbox_sw2hw_dq_sdq_tclass_set(mbox, tclass);
mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
}
err = mlxsw_cmd_sw2hw_sdq(mlxsw_pci->core, mbox, q->num);
if (err)
return err;
mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
return 0;
}
static void mlxsw_pci_sdq_fini(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
mlxsw_cmd_hw2sw_sdq(mlxsw_pci->core, q->num);
}
static int mlxsw_pci_wqe_frag_map(struct mlxsw_pci *mlxsw_pci, char *wqe,
int index, char *frag_data, size_t frag_len,
int direction)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
dma_addr_t mapaddr;
mapaddr = dma_map_single(&pdev->dev, frag_data, frag_len, direction);
if (unlikely(dma_mapping_error(&pdev->dev, mapaddr))) {
dev_err_ratelimited(&pdev->dev, "failed to dma map tx frag\n");
return -EIO;
}
mlxsw_pci_wqe_address_set(wqe, index, mapaddr);
mlxsw_pci_wqe_byte_count_set(wqe, index, frag_len);
return 0;
}
static void mlxsw_pci_wqe_frag_unmap(struct mlxsw_pci *mlxsw_pci, char *wqe,
int index, int direction)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
size_t frag_len = mlxsw_pci_wqe_byte_count_get(wqe, index);
dma_addr_t mapaddr = mlxsw_pci_wqe_address_get(wqe, index);
if (!frag_len)
return;
dma_unmap_single(&pdev->dev, mapaddr, frag_len, direction);
}
static int mlxsw_pci_rdq_skb_alloc(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue_elem_info *elem_info)
{
size_t buf_len = MLXSW_PORT_MAX_MTU;
char *wqe = elem_info->elem;
struct sk_buff *skb;
int err;
skb = netdev_alloc_skb_ip_align(NULL, buf_len);
if (!skb)
return -ENOMEM;
err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
buf_len, DMA_FROM_DEVICE);
if (err)
goto err_frag_map;
elem_info->u.rdq.skb = skb;
return 0;
err_frag_map:
dev_kfree_skb_any(skb);
return err;
}
static void mlxsw_pci_rdq_skb_free(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue_elem_info *elem_info)
{
struct sk_buff *skb;
char *wqe;
skb = elem_info->u.rdq.skb;
wqe = elem_info->elem;
mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
}
static int mlxsw_pci_rdq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
struct mlxsw_pci_queue *q)
{
struct mlxsw_pci_queue_elem_info *elem_info;
u8 sdq_count = mlxsw_pci_sdq_count(mlxsw_pci);
int i;
int err;
q->producer_counter = 0;
q->consumer_counter = 0;
/* Set CQ of same number of this RDQ with base
* above SDQ count as the lower ones are assigned to SDQs.
*/
mlxsw_cmd_mbox_sw2hw_dq_cq_set(mbox, sdq_count + q->num);
mlxsw_cmd_mbox_sw2hw_dq_log2_dq_sz_set(mbox, 3); /* 8 pages */
for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
mlxsw_cmd_mbox_sw2hw_dq_pa_set(mbox, i, mapaddr);
}
err = mlxsw_cmd_sw2hw_rdq(mlxsw_pci->core, mbox, q->num);
if (err)
return err;
mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
for (i = 0; i < q->count; i++) {
elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
BUG_ON(!elem_info);
err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
if (err)
goto rollback;
/* Everything is set up, ring doorbell to pass elem to HW */
q->producer_counter++;
mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
}
return 0;
rollback:
for (i--; i >= 0; i--) {
elem_info = mlxsw_pci_queue_elem_info_get(q, i);
mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
}
mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
return err;
}
static void mlxsw_pci_rdq_fini(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
struct mlxsw_pci_queue_elem_info *elem_info;
int i;
mlxsw_cmd_hw2sw_rdq(mlxsw_pci->core, q->num);
for (i = 0; i < q->count; i++) {
elem_info = mlxsw_pci_queue_elem_info_get(q, i);
mlxsw_pci_rdq_skb_free(mlxsw_pci, elem_info);
}
}
static void mlxsw_pci_cq_pre_init(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
q->u.cq.v = mlxsw_pci->max_cqe_ver;
if (q->u.cq.v == MLXSW_PCI_CQE_V2 &&
q->num < mlxsw_pci->num_sdq_cqs &&
!mlxsw_core_sdq_supports_cqe_v2(mlxsw_pci->core))
q->u.cq.v = MLXSW_PCI_CQE_V1;
}
static int mlxsw_pci_cq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
struct mlxsw_pci_queue *q)
{
int i;
int err;
q->consumer_counter = 0;
for (i = 0; i < q->count; i++) {
char *elem = mlxsw_pci_queue_elem_get(q, i);
mlxsw_pci_cqe_owner_set(q->u.cq.v, elem, 1);
}
if (q->u.cq.v == MLXSW_PCI_CQE_V1)
mlxsw_cmd_mbox_sw2hw_cq_cqe_ver_set(mbox,
MLXSW_CMD_MBOX_SW2HW_CQ_CQE_VER_1);
else if (q->u.cq.v == MLXSW_PCI_CQE_V2)
mlxsw_cmd_mbox_sw2hw_cq_cqe_ver_set(mbox,
MLXSW_CMD_MBOX_SW2HW_CQ_CQE_VER_2);
mlxsw_cmd_mbox_sw2hw_cq_c_eqn_set(mbox, MLXSW_PCI_EQ_COMP_NUM);
mlxsw_cmd_mbox_sw2hw_cq_st_set(mbox, 0);
mlxsw_cmd_mbox_sw2hw_cq_log_cq_size_set(mbox, ilog2(q->count));
for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
mlxsw_cmd_mbox_sw2hw_cq_pa_set(mbox, i, mapaddr);
}
err = mlxsw_cmd_sw2hw_cq(mlxsw_pci->core, mbox, q->num);
if (err)
return err;
mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
return 0;
}
static void mlxsw_pci_cq_fini(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
mlxsw_cmd_hw2sw_cq(mlxsw_pci->core, q->num);
}
static unsigned int mlxsw_pci_read32_off(struct mlxsw_pci *mlxsw_pci,
ptrdiff_t off)
{
return ioread32be(mlxsw_pci->hw_addr + off);
}
static void mlxsw_pci_skb_cb_ts_set(struct mlxsw_pci *mlxsw_pci,
struct sk_buff *skb,
enum mlxsw_pci_cqe_v cqe_v, char *cqe)
{
6.5.5
2023-10-24 12:59:35 +02:00
u8 ts_type;
Initial commit
2023-08-30 17:31:07 +02:00
if (cqe_v != MLXSW_PCI_CQE_V2)
return;
6.5.5
2023-10-24 12:59:35 +02:00
ts_type = mlxsw_pci_cqe2_time_stamp_type_get(cqe);
if (ts_type != MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC &&
ts_type != MLXSW_PCI_CQE_TIME_STAMP_TYPE_MIRROR_UTC)
Initial commit
2023-08-30 17:31:07 +02:00
return;
mlxsw_skb_cb(skb)->cqe_ts.sec = mlxsw_pci_cqe2_time_stamp_sec_get(cqe);
mlxsw_skb_cb(skb)->cqe_ts.nsec =
mlxsw_pci_cqe2_time_stamp_nsec_get(cqe);
}
static void mlxsw_pci_cqe_sdq_handle(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q,
u16 consumer_counter_limit,
enum mlxsw_pci_cqe_v cqe_v,
char *cqe)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
struct mlxsw_pci_queue_elem_info *elem_info;
struct mlxsw_tx_info tx_info;
char *wqe;
struct sk_buff *skb;
int i;
spin_lock(&q->lock);
elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
tx_info = mlxsw_skb_cb(elem_info->u.sdq.skb)->tx_info;
skb = elem_info->u.sdq.skb;
wqe = elem_info->elem;
for (i = 0; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
if (unlikely(!tx_info.is_emad &&
skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
mlxsw_pci_skb_cb_ts_set(mlxsw_pci, skb, cqe_v, cqe);
mlxsw_core_ptp_transmitted(mlxsw_pci->core, skb,
tx_info.local_port);
skb = NULL;
}
if (skb)
dev_kfree_skb_any(skb);
elem_info->u.sdq.skb = NULL;
if (q->consumer_counter++ != consumer_counter_limit)
dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in SDQ\n");
spin_unlock(&q->lock);
}
static void mlxsw_pci_cqe_rdq_md_tx_port_init(struct sk_buff *skb,
const char *cqe)
{
struct mlxsw_skb_cb *cb = mlxsw_skb_cb(skb);
if (mlxsw_pci_cqe2_tx_lag_get(cqe)) {
cb->rx_md_info.tx_port_is_lag = true;
cb->rx_md_info.tx_lag_id = mlxsw_pci_cqe2_tx_lag_id_get(cqe);
cb->rx_md_info.tx_lag_port_index =
mlxsw_pci_cqe2_tx_lag_subport_get(cqe);
} else {
cb->rx_md_info.tx_port_is_lag = false;
cb->rx_md_info.tx_sys_port =
mlxsw_pci_cqe2_tx_system_port_get(cqe);
}
if (cb->rx_md_info.tx_sys_port != MLXSW_PCI_CQE2_TX_PORT_MULTI_PORT &&
cb->rx_md_info.tx_sys_port != MLXSW_PCI_CQE2_TX_PORT_INVALID)
cb->rx_md_info.tx_port_valid = 1;
else
cb->rx_md_info.tx_port_valid = 0;
}
static void mlxsw_pci_cqe_rdq_md_init(struct sk_buff *skb, const char *cqe)
{
struct mlxsw_skb_cb *cb = mlxsw_skb_cb(skb);
cb->rx_md_info.tx_congestion = mlxsw_pci_cqe2_mirror_cong_get(cqe);
if (cb->rx_md_info.tx_congestion != MLXSW_PCI_CQE2_MIRROR_CONG_INVALID)
cb->rx_md_info.tx_congestion_valid = 1;
else
cb->rx_md_info.tx_congestion_valid = 0;
cb->rx_md_info.tx_congestion <<= MLXSW_PCI_CQE2_MIRROR_CONG_SHIFT;
cb->rx_md_info.latency = mlxsw_pci_cqe2_mirror_latency_get(cqe);
if (cb->rx_md_info.latency != MLXSW_PCI_CQE2_MIRROR_LATENCY_INVALID)
cb->rx_md_info.latency_valid = 1;
else
cb->rx_md_info.latency_valid = 0;
cb->rx_md_info.tx_tc = mlxsw_pci_cqe2_mirror_tclass_get(cqe);
if (cb->rx_md_info.tx_tc != MLXSW_PCI_CQE2_MIRROR_TCLASS_INVALID)
cb->rx_md_info.tx_tc_valid = 1;
else
cb->rx_md_info.tx_tc_valid = 0;
mlxsw_pci_cqe_rdq_md_tx_port_init(skb, cqe);
}
static void mlxsw_pci_cqe_rdq_handle(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q,
u16 consumer_counter_limit,
enum mlxsw_pci_cqe_v cqe_v, char *cqe)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
struct mlxsw_pci_queue_elem_info *elem_info;
struct mlxsw_rx_info rx_info = {};
char wqe[MLXSW_PCI_WQE_SIZE];
struct sk_buff *skb;
u16 byte_count;
int err;
elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
skb = elem_info->u.rdq.skb;
memcpy(wqe, elem_info->elem, MLXSW_PCI_WQE_SIZE);
if (q->consumer_counter++ != consumer_counter_limit)
dev_dbg_ratelimited(&pdev->dev, "Consumer counter does not match limit in RDQ\n");
err = mlxsw_pci_rdq_skb_alloc(mlxsw_pci, elem_info);
if (err) {
dev_err_ratelimited(&pdev->dev, "Failed to alloc skb for RDQ\n");
goto out;
}
mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, 0, DMA_FROM_DEVICE);
if (mlxsw_pci_cqe_lag_get(cqe_v, cqe)) {
rx_info.is_lag = true;
rx_info.u.lag_id = mlxsw_pci_cqe_lag_id_get(cqe_v, cqe);
rx_info.lag_port_index =
mlxsw_pci_cqe_lag_subport_get(cqe_v, cqe);
} else {
rx_info.is_lag = false;
rx_info.u.sys_port = mlxsw_pci_cqe_system_port_get(cqe);
}
rx_info.trap_id = mlxsw_pci_cqe_trap_id_get(cqe);
if (rx_info.trap_id == MLXSW_TRAP_ID_DISCARD_INGRESS_ACL ||
rx_info.trap_id == MLXSW_TRAP_ID_DISCARD_EGRESS_ACL) {
u32 cookie_index = 0;
if (mlxsw_pci->max_cqe_ver >= MLXSW_PCI_CQE_V2)
cookie_index = mlxsw_pci_cqe2_user_def_val_orig_pkt_len_get(cqe);
mlxsw_skb_cb(skb)->rx_md_info.cookie_index = cookie_index;
} else if (rx_info.trap_id >= MLXSW_TRAP_ID_MIRROR_SESSION0 &&
rx_info.trap_id <= MLXSW_TRAP_ID_MIRROR_SESSION7 &&
mlxsw_pci->max_cqe_ver >= MLXSW_PCI_CQE_V2) {
rx_info.mirror_reason = mlxsw_pci_cqe2_mirror_reason_get(cqe);
mlxsw_pci_cqe_rdq_md_init(skb, cqe);
} else if (rx_info.trap_id == MLXSW_TRAP_ID_PKT_SAMPLE &&
mlxsw_pci->max_cqe_ver >= MLXSW_PCI_CQE_V2) {
mlxsw_pci_cqe_rdq_md_tx_port_init(skb, cqe);
}
mlxsw_pci_skb_cb_ts_set(mlxsw_pci, skb, cqe_v, cqe);
byte_count = mlxsw_pci_cqe_byte_count_get(cqe);
if (mlxsw_pci_cqe_crc_get(cqe_v, cqe))
byte_count -= ETH_FCS_LEN;
skb_put(skb, byte_count);
mlxsw_core_skb_receive(mlxsw_pci->core, skb, &rx_info);
out:
/* Everything is set up, ring doorbell to pass elem to HW */
q->producer_counter++;
mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
return;
}
static char *mlxsw_pci_cq_sw_cqe_get(struct mlxsw_pci_queue *q)
{
struct mlxsw_pci_queue_elem_info *elem_info;
char *elem;
bool owner_bit;
elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
elem = elem_info->elem;
owner_bit = mlxsw_pci_cqe_owner_get(q->u.cq.v, elem);
if (mlxsw_pci_elem_hw_owned(q, owner_bit))
return NULL;
q->consumer_counter++;
rmb(); /* make sure we read owned bit before the rest of elem */
return elem;
}
static void mlxsw_pci_cq_tasklet(struct tasklet_struct *t)
{
struct mlxsw_pci_queue *q = from_tasklet(q, t, tasklet);
struct mlxsw_pci *mlxsw_pci = q->pci;
char *cqe;
int items = 0;
int credits = q->count >> 1;
while ((cqe = mlxsw_pci_cq_sw_cqe_get(q))) {
u16 wqe_counter = mlxsw_pci_cqe_wqe_counter_get(cqe);
u8 sendq = mlxsw_pci_cqe_sr_get(q->u.cq.v, cqe);
u8 dqn = mlxsw_pci_cqe_dqn_get(q->u.cq.v, cqe);
char ncqe[MLXSW_PCI_CQE_SIZE_MAX];
memcpy(ncqe, cqe, q->elem_size);
mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
if (sendq) {
struct mlxsw_pci_queue *sdq;
sdq = mlxsw_pci_sdq_get(mlxsw_pci, dqn);
mlxsw_pci_cqe_sdq_handle(mlxsw_pci, sdq,
wqe_counter, q->u.cq.v, ncqe);
q->u.cq.comp_sdq_count++;
} else {
struct mlxsw_pci_queue *rdq;
rdq = mlxsw_pci_rdq_get(mlxsw_pci, dqn);
mlxsw_pci_cqe_rdq_handle(mlxsw_pci, rdq,
wqe_counter, q->u.cq.v, ncqe);
q->u.cq.comp_rdq_count++;
}
if (++items == credits)
break;
}
if (items)
mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
}
static u16 mlxsw_pci_cq_elem_count(const struct mlxsw_pci_queue *q)
{
return q->u.cq.v == MLXSW_PCI_CQE_V2 ? MLXSW_PCI_CQE2_COUNT :
MLXSW_PCI_CQE01_COUNT;
}
static u8 mlxsw_pci_cq_elem_size(const struct mlxsw_pci_queue *q)
{
return q->u.cq.v == MLXSW_PCI_CQE_V2 ? MLXSW_PCI_CQE2_SIZE :
MLXSW_PCI_CQE01_SIZE;
}
static int mlxsw_pci_eq_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
struct mlxsw_pci_queue *q)
{
int i;
int err;
q->consumer_counter = 0;
for (i = 0; i < q->count; i++) {
char *elem = mlxsw_pci_queue_elem_get(q, i);
mlxsw_pci_eqe_owner_set(elem, 1);
}
mlxsw_cmd_mbox_sw2hw_eq_int_msix_set(mbox, 1); /* MSI-X used */
mlxsw_cmd_mbox_sw2hw_eq_st_set(mbox, 1); /* armed */
mlxsw_cmd_mbox_sw2hw_eq_log_eq_size_set(mbox, ilog2(q->count));
for (i = 0; i < MLXSW_PCI_AQ_PAGES; i++) {
dma_addr_t mapaddr = __mlxsw_pci_queue_page_get(q, i);
mlxsw_cmd_mbox_sw2hw_eq_pa_set(mbox, i, mapaddr);
}
err = mlxsw_cmd_sw2hw_eq(mlxsw_pci->core, mbox, q->num);
if (err)
return err;
mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
return 0;
}
static void mlxsw_pci_eq_fini(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q)
{
mlxsw_cmd_hw2sw_eq(mlxsw_pci->core, q->num);
}
static void mlxsw_pci_eq_cmd_event(struct mlxsw_pci *mlxsw_pci, char *eqe)
{
mlxsw_pci->cmd.comp.status = mlxsw_pci_eqe_cmd_status_get(eqe);
mlxsw_pci->cmd.comp.out_param =
((u64) mlxsw_pci_eqe_cmd_out_param_h_get(eqe)) << 32 |
mlxsw_pci_eqe_cmd_out_param_l_get(eqe);
mlxsw_pci->cmd.wait_done = true;
wake_up(&mlxsw_pci->cmd.wait);
}
static char *mlxsw_pci_eq_sw_eqe_get(struct mlxsw_pci_queue *q)
{
struct mlxsw_pci_queue_elem_info *elem_info;
char *elem;
bool owner_bit;
elem_info = mlxsw_pci_queue_elem_info_consumer_get(q);
elem = elem_info->elem;
owner_bit = mlxsw_pci_eqe_owner_get(elem);
if (mlxsw_pci_elem_hw_owned(q, owner_bit))
return NULL;
q->consumer_counter++;
rmb(); /* make sure we read owned bit before the rest of elem */
return elem;
}
static void mlxsw_pci_eq_tasklet(struct tasklet_struct *t)
{
struct mlxsw_pci_queue *q = from_tasklet(q, t, tasklet);
struct mlxsw_pci *mlxsw_pci = q->pci;
u8 cq_count = mlxsw_pci_cq_count(mlxsw_pci);
unsigned long active_cqns[BITS_TO_LONGS(MLXSW_PCI_CQS_MAX)];
char *eqe;
u8 cqn;
bool cq_handle = false;
int items = 0;
int credits = q->count >> 1;
memset(&active_cqns, 0, sizeof(active_cqns));
while ((eqe = mlxsw_pci_eq_sw_eqe_get(q))) {
/* Command interface completion events are always received on
* queue MLXSW_PCI_EQ_ASYNC_NUM (EQ0) and completion events
* are mapped to queue MLXSW_PCI_EQ_COMP_NUM (EQ1).
*/
switch (q->num) {
case MLXSW_PCI_EQ_ASYNC_NUM:
mlxsw_pci_eq_cmd_event(mlxsw_pci, eqe);
q->u.eq.ev_cmd_count++;
break;
case MLXSW_PCI_EQ_COMP_NUM:
cqn = mlxsw_pci_eqe_cqn_get(eqe);
set_bit(cqn, active_cqns);
cq_handle = true;
q->u.eq.ev_comp_count++;
break;
default:
q->u.eq.ev_other_count++;
}
if (++items == credits)
break;
}
if (items) {
mlxsw_pci_queue_doorbell_consumer_ring(mlxsw_pci, q);
mlxsw_pci_queue_doorbell_arm_consumer_ring(mlxsw_pci, q);
}
if (!cq_handle)
return;
for_each_set_bit(cqn, active_cqns, cq_count) {
q = mlxsw_pci_cq_get(mlxsw_pci, cqn);
mlxsw_pci_queue_tasklet_schedule(q);
}
}
struct mlxsw_pci_queue_ops {
const char *name;
enum mlxsw_pci_queue_type type;
void (*pre_init)(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q);
int (*init)(struct mlxsw_pci *mlxsw_pci, char *mbox,
struct mlxsw_pci_queue *q);
void (*fini)(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_queue *q);
void (*tasklet)(struct tasklet_struct *t);
u16 (*elem_count_f)(const struct mlxsw_pci_queue *q);
u8 (*elem_size_f)(const struct mlxsw_pci_queue *q);
u16 elem_count;
u8 elem_size;
};
static const struct mlxsw_pci_queue_ops mlxsw_pci_sdq_ops = {
.type = MLXSW_PCI_QUEUE_TYPE_SDQ,
.init = mlxsw_pci_sdq_init,
.fini = mlxsw_pci_sdq_fini,
.elem_count = MLXSW_PCI_WQE_COUNT,
.elem_size = MLXSW_PCI_WQE_SIZE,
};
static const struct mlxsw_pci_queue_ops mlxsw_pci_rdq_ops = {
.type = MLXSW_PCI_QUEUE_TYPE_RDQ,
.init = mlxsw_pci_rdq_init,
.fini = mlxsw_pci_rdq_fini,
.elem_count = MLXSW_PCI_WQE_COUNT,
.elem_size = MLXSW_PCI_WQE_SIZE
};
static const struct mlxsw_pci_queue_ops mlxsw_pci_cq_ops = {
.type = MLXSW_PCI_QUEUE_TYPE_CQ,
.pre_init = mlxsw_pci_cq_pre_init,
.init = mlxsw_pci_cq_init,
.fini = mlxsw_pci_cq_fini,
.tasklet = mlxsw_pci_cq_tasklet,
.elem_count_f = mlxsw_pci_cq_elem_count,
.elem_size_f = mlxsw_pci_cq_elem_size
};
static const struct mlxsw_pci_queue_ops mlxsw_pci_eq_ops = {
.type = MLXSW_PCI_QUEUE_TYPE_EQ,
.init = mlxsw_pci_eq_init,
.fini = mlxsw_pci_eq_fini,
.tasklet = mlxsw_pci_eq_tasklet,
.elem_count = MLXSW_PCI_EQE_COUNT,
.elem_size = MLXSW_PCI_EQE_SIZE
};
static int mlxsw_pci_queue_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
const struct mlxsw_pci_queue_ops *q_ops,
struct mlxsw_pci_queue *q, u8 q_num)
{
struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
int i;
int err;
q->num = q_num;
if (q_ops->pre_init)
q_ops->pre_init(mlxsw_pci, q);
spin_lock_init(&q->lock);
q->count = q_ops->elem_count_f ? q_ops->elem_count_f(q) :
q_ops->elem_count;
q->elem_size = q_ops->elem_size_f ? q_ops->elem_size_f(q) :
q_ops->elem_size;
q->type = q_ops->type;
q->pci = mlxsw_pci;
if (q_ops->tasklet)
tasklet_setup(&q->tasklet, q_ops->tasklet);
mem_item->size = MLXSW_PCI_AQ_SIZE;
mem_item->buf = dma_alloc_coherent(&mlxsw_pci->pdev->dev,
mem_item->size, &mem_item->mapaddr,
GFP_KERNEL);
if (!mem_item->buf)
return -ENOMEM;
q->elem_info = kcalloc(q->count, sizeof(*q->elem_info), GFP_KERNEL);
if (!q->elem_info) {
err = -ENOMEM;
goto err_elem_info_alloc;
}
/* Initialize dma mapped elements info elem_info for
* future easy access.
*/
for (i = 0; i < q->count; i++) {
struct mlxsw_pci_queue_elem_info *elem_info;
elem_info = mlxsw_pci_queue_elem_info_get(q, i);
elem_info->elem =
__mlxsw_pci_queue_elem_get(q, q->elem_size, i);
}
mlxsw_cmd_mbox_zero(mbox);
err = q_ops->init(mlxsw_pci, mbox, q);
if (err)
goto err_q_ops_init;
return 0;
err_q_ops_init:
kfree(q->elem_info);
err_elem_info_alloc:
dma_free_coherent(&mlxsw_pci->pdev->dev, mem_item->size,
mem_item->buf, mem_item->mapaddr);
return err;
}
static void mlxsw_pci_queue_fini(struct mlxsw_pci *mlxsw_pci,
const struct mlxsw_pci_queue_ops *q_ops,
struct mlxsw_pci_queue *q)
{
struct mlxsw_pci_mem_item *mem_item = &q->mem_item;
q_ops->fini(mlxsw_pci, q);
kfree(q->elem_info);
dma_free_coherent(&mlxsw_pci->pdev->dev, mem_item->size,
mem_item->buf, mem_item->mapaddr);
}
static int mlxsw_pci_queue_group_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
const struct mlxsw_pci_queue_ops *q_ops,
u8 num_qs)
{
struct mlxsw_pci_queue_type_group *queue_group;
int i;
int err;
queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
queue_group->q = kcalloc(num_qs, sizeof(*queue_group->q), GFP_KERNEL);
if (!queue_group->q)
return -ENOMEM;
for (i = 0; i < num_qs; i++) {
err = mlxsw_pci_queue_init(mlxsw_pci, mbox, q_ops,
&queue_group->q[i], i);
if (err)
goto err_queue_init;
}
queue_group->count = num_qs;
return 0;
err_queue_init:
for (i--; i >= 0; i--)
mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
kfree(queue_group->q);
return err;
}
static void mlxsw_pci_queue_group_fini(struct mlxsw_pci *mlxsw_pci,
const struct mlxsw_pci_queue_ops *q_ops)
{
struct mlxsw_pci_queue_type_group *queue_group;
int i;
queue_group = mlxsw_pci_queue_type_group_get(mlxsw_pci, q_ops->type);
for (i = 0; i < queue_group->count; i++)
mlxsw_pci_queue_fini(mlxsw_pci, q_ops, &queue_group->q[i]);
kfree(queue_group->q);
}
static int mlxsw_pci_aqs_init(struct mlxsw_pci *mlxsw_pci, char *mbox)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
u8 num_sdqs;
u8 sdq_log2sz;
u8 num_rdqs;
u8 rdq_log2sz;
u8 num_cqs;
u8 cq_log2sz;
u8 cqv2_log2sz;
u8 num_eqs;
u8 eq_log2sz;
int err;
mlxsw_cmd_mbox_zero(mbox);
err = mlxsw_cmd_query_aq_cap(mlxsw_pci->core, mbox);
if (err)
return err;
num_sdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_sdqs_get(mbox);
sdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_sdq_sz_get(mbox);
num_rdqs = mlxsw_cmd_mbox_query_aq_cap_max_num_rdqs_get(mbox);
rdq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_rdq_sz_get(mbox);
num_cqs = mlxsw_cmd_mbox_query_aq_cap_max_num_cqs_get(mbox);
cq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cq_sz_get(mbox);
cqv2_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_cqv2_sz_get(mbox);
num_eqs = mlxsw_cmd_mbox_query_aq_cap_max_num_eqs_get(mbox);
eq_log2sz = mlxsw_cmd_mbox_query_aq_cap_log_max_eq_sz_get(mbox);
if (num_sdqs + num_rdqs > num_cqs ||
num_sdqs < MLXSW_PCI_SDQS_MIN ||
num_cqs > MLXSW_PCI_CQS_MAX || num_eqs != MLXSW_PCI_EQS_COUNT) {
dev_err(&pdev->dev, "Unsupported number of queues\n");
return -EINVAL;
}
if ((1 << sdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
(1 << rdq_log2sz != MLXSW_PCI_WQE_COUNT) ||
(1 << cq_log2sz != MLXSW_PCI_CQE01_COUNT) ||
(mlxsw_pci->max_cqe_ver == MLXSW_PCI_CQE_V2 &&
(1 << cqv2_log2sz != MLXSW_PCI_CQE2_COUNT)) ||
(1 << eq_log2sz != MLXSW_PCI_EQE_COUNT)) {
dev_err(&pdev->dev, "Unsupported number of async queue descriptors\n");
return -EINVAL;
}
mlxsw_pci->num_sdq_cqs = num_sdqs;
err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_eq_ops,
num_eqs);
if (err) {
dev_err(&pdev->dev, "Failed to initialize event queues\n");
return err;
}
err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_cq_ops,
num_cqs);
if (err) {
dev_err(&pdev->dev, "Failed to initialize completion queues\n");
goto err_cqs_init;
}
err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_sdq_ops,
num_sdqs);
if (err) {
dev_err(&pdev->dev, "Failed to initialize send descriptor queues\n");
goto err_sdqs_init;
}
err = mlxsw_pci_queue_group_init(mlxsw_pci, mbox, &mlxsw_pci_rdq_ops,
num_rdqs);
if (err) {
dev_err(&pdev->dev, "Failed to initialize receive descriptor queues\n");
goto err_rdqs_init;
}
/* We have to poll in command interface until queues are initialized */
mlxsw_pci->cmd.nopoll = true;
return 0;
err_rdqs_init:
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
err_sdqs_init:
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
err_cqs_init:
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
return err;
}
static void mlxsw_pci_aqs_fini(struct mlxsw_pci *mlxsw_pci)
{
mlxsw_pci->cmd.nopoll = false;
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_rdq_ops);
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_sdq_ops);
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_cq_ops);
mlxsw_pci_queue_group_fini(mlxsw_pci, &mlxsw_pci_eq_ops);
}
static void
mlxsw_pci_config_profile_swid_config(struct mlxsw_pci *mlxsw_pci,
char *mbox, int index,
const struct mlxsw_swid_config *swid)
{
u8 mask = 0;
if (swid->used_type) {
mlxsw_cmd_mbox_config_profile_swid_config_type_set(
mbox, index, swid->type);
mask |= 1;
}
if (swid->used_properties) {
mlxsw_cmd_mbox_config_profile_swid_config_properties_set(
mbox, index, swid->properties);
mask |= 2;
}
mlxsw_cmd_mbox_config_profile_swid_config_mask_set(mbox, index, mask);
}
static int
mlxsw_pci_profile_get_kvd_sizes(const struct mlxsw_pci *mlxsw_pci,
const struct mlxsw_config_profile *profile,
struct mlxsw_res *res)
{
u64 single_size, double_size, linear_size;
int err;
err = mlxsw_core_kvd_sizes_get(mlxsw_pci->core, profile,
&single_size, &double_size,
&linear_size);
if (err)
return err;
MLXSW_RES_SET(res, KVD_SINGLE_SIZE, single_size);
MLXSW_RES_SET(res, KVD_DOUBLE_SIZE, double_size);
MLXSW_RES_SET(res, KVD_LINEAR_SIZE, linear_size);
return 0;
}
static int mlxsw_pci_config_profile(struct mlxsw_pci *mlxsw_pci, char *mbox,
const struct mlxsw_config_profile *profile,
struct mlxsw_res *res)
{
int i;
int err;
mlxsw_cmd_mbox_zero(mbox);
if (profile->used_max_vepa_channels) {
mlxsw_cmd_mbox_config_profile_set_max_vepa_channels_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_vepa_channels_set(
mbox, profile->max_vepa_channels);
}
if (profile->used_max_lag) {
mlxsw_cmd_mbox_config_profile_set_max_lag_set(mbox, 1);
mlxsw_cmd_mbox_config_profile_max_lag_set(mbox,
profile->max_lag);
}
if (profile->used_max_mid) {
mlxsw_cmd_mbox_config_profile_set_max_mid_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_mid_set(
mbox, profile->max_mid);
}
if (profile->used_max_pgt) {
mlxsw_cmd_mbox_config_profile_set_max_pgt_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_pgt_set(
mbox, profile->max_pgt);
}
if (profile->used_max_system_port) {
mlxsw_cmd_mbox_config_profile_set_max_system_port_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_system_port_set(
mbox, profile->max_system_port);
}
if (profile->used_max_vlan_groups) {
mlxsw_cmd_mbox_config_profile_set_max_vlan_groups_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_vlan_groups_set(
mbox, profile->max_vlan_groups);
}
if (profile->used_max_regions) {
mlxsw_cmd_mbox_config_profile_set_max_regions_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_regions_set(
mbox, profile->max_regions);
}
if (profile->used_flood_tables) {
mlxsw_cmd_mbox_config_profile_set_flood_tables_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_flood_tables_set(
mbox, profile->max_flood_tables);
mlxsw_cmd_mbox_config_profile_max_vid_flood_tables_set(
mbox, profile->max_vid_flood_tables);
mlxsw_cmd_mbox_config_profile_max_fid_offset_flood_tables_set(
mbox, profile->max_fid_offset_flood_tables);
mlxsw_cmd_mbox_config_profile_fid_offset_flood_table_size_set(
mbox, profile->fid_offset_flood_table_size);
mlxsw_cmd_mbox_config_profile_max_fid_flood_tables_set(
mbox, profile->max_fid_flood_tables);
mlxsw_cmd_mbox_config_profile_fid_flood_table_size_set(
mbox, profile->fid_flood_table_size);
}
if (profile->used_flood_mode) {
mlxsw_cmd_mbox_config_profile_set_flood_mode_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_flood_mode_set(
mbox, profile->flood_mode);
}
if (profile->used_max_ib_mc) {
mlxsw_cmd_mbox_config_profile_set_max_ib_mc_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_ib_mc_set(
mbox, profile->max_ib_mc);
}
if (profile->used_max_pkey) {
mlxsw_cmd_mbox_config_profile_set_max_pkey_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_max_pkey_set(
mbox, profile->max_pkey);
}
if (profile->used_ar_sec) {
mlxsw_cmd_mbox_config_profile_set_ar_sec_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_ar_sec_set(
mbox, profile->ar_sec);
}
if (profile->used_adaptive_routing_group_cap) {
mlxsw_cmd_mbox_config_profile_set_adaptive_routing_group_cap_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_adaptive_routing_group_cap_set(
mbox, profile->adaptive_routing_group_cap);
}
if (profile->used_ubridge) {
mlxsw_cmd_mbox_config_profile_set_ubridge_set(mbox, 1);
mlxsw_cmd_mbox_config_profile_ubridge_set(mbox,
profile->ubridge);
}
if (profile->used_kvd_sizes && MLXSW_RES_VALID(res, KVD_SIZE)) {
err = mlxsw_pci_profile_get_kvd_sizes(mlxsw_pci, profile, res);
if (err)
return err;
mlxsw_cmd_mbox_config_profile_set_kvd_linear_size_set(mbox, 1);
mlxsw_cmd_mbox_config_profile_kvd_linear_size_set(mbox,
MLXSW_RES_GET(res, KVD_LINEAR_SIZE));
mlxsw_cmd_mbox_config_profile_set_kvd_hash_single_size_set(mbox,
1);
mlxsw_cmd_mbox_config_profile_kvd_hash_single_size_set(mbox,
MLXSW_RES_GET(res, KVD_SINGLE_SIZE));
mlxsw_cmd_mbox_config_profile_set_kvd_hash_double_size_set(
mbox, 1);
mlxsw_cmd_mbox_config_profile_kvd_hash_double_size_set(mbox,
MLXSW_RES_GET(res, KVD_DOUBLE_SIZE));
}
for (i = 0; i < MLXSW_CONFIG_PROFILE_SWID_COUNT; i++)
mlxsw_pci_config_profile_swid_config(mlxsw_pci, mbox, i,
&profile->swid_config[i]);
if (mlxsw_pci->max_cqe_ver > MLXSW_PCI_CQE_V0) {
mlxsw_cmd_mbox_config_profile_set_cqe_version_set(mbox, 1);
mlxsw_cmd_mbox_config_profile_cqe_version_set(mbox, 1);
}
if (profile->used_cqe_time_stamp_type) {
mlxsw_cmd_mbox_config_profile_set_cqe_time_stamp_type_set(mbox,
1);
mlxsw_cmd_mbox_config_profile_cqe_time_stamp_type_set(mbox,
profile->cqe_time_stamp_type);
}
return mlxsw_cmd_config_profile_set(mlxsw_pci->core, mbox);
}
static int mlxsw_pci_boardinfo(struct mlxsw_pci *mlxsw_pci, char *mbox)
{
struct mlxsw_bus_info *bus_info = &mlxsw_pci->bus_info;
int err;
mlxsw_cmd_mbox_zero(mbox);
err = mlxsw_cmd_boardinfo(mlxsw_pci->core, mbox);
if (err)
return err;
mlxsw_cmd_mbox_boardinfo_vsd_memcpy_from(mbox, bus_info->vsd);
mlxsw_cmd_mbox_boardinfo_psid_memcpy_from(mbox, bus_info->psid);
return 0;
}
static int mlxsw_pci_fw_area_init(struct mlxsw_pci *mlxsw_pci, char *mbox,
u16 num_pages)
{
struct mlxsw_pci_mem_item *mem_item;
int nent = 0;
int i;
int err;
mlxsw_pci->fw_area.items = kcalloc(num_pages, sizeof(*mem_item),
GFP_KERNEL);
if (!mlxsw_pci->fw_area.items)
return -ENOMEM;
mlxsw_pci->fw_area.count = num_pages;
mlxsw_cmd_mbox_zero(mbox);
for (i = 0; i < num_pages; i++) {
mem_item = &mlxsw_pci->fw_area.items[i];
mem_item->size = MLXSW_PCI_PAGE_SIZE;
mem_item->buf = dma_alloc_coherent(&mlxsw_pci->pdev->dev,
mem_item->size,
&mem_item->mapaddr, GFP_KERNEL);
if (!mem_item->buf) {
err = -ENOMEM;
goto err_alloc;
}
mlxsw_cmd_mbox_map_fa_pa_set(mbox, nent, mem_item->mapaddr);
mlxsw_cmd_mbox_map_fa_log2size_set(mbox, nent, 0); /* 1 page */
if (++nent == MLXSW_CMD_MAP_FA_VPM_ENTRIES_MAX) {
err = mlxsw_cmd_map_fa(mlxsw_pci->core, mbox, nent);
if (err)
goto err_cmd_map_fa;
nent = 0;
mlxsw_cmd_mbox_zero(mbox);
}
}
if (nent) {
err = mlxsw_cmd_map_fa(mlxsw_pci->core, mbox, nent);
if (err)
goto err_cmd_map_fa;
}
return 0;
err_cmd_map_fa:
err_alloc:
for (i--; i >= 0; i--) {
mem_item = &mlxsw_pci->fw_area.items[i];
dma_free_coherent(&mlxsw_pci->pdev->dev, mem_item->size,
mem_item->buf, mem_item->mapaddr);
}
kfree(mlxsw_pci->fw_area.items);
return err;
}
static void mlxsw_pci_fw_area_fini(struct mlxsw_pci *mlxsw_pci)
{
struct mlxsw_pci_mem_item *mem_item;
int i;
mlxsw_cmd_unmap_fa(mlxsw_pci->core);
for (i = 0; i < mlxsw_pci->fw_area.count; i++) {
mem_item = &mlxsw_pci->fw_area.items[i];
dma_free_coherent(&mlxsw_pci->pdev->dev, mem_item->size,
mem_item->buf, mem_item->mapaddr);
}
kfree(mlxsw_pci->fw_area.items);
}
static irqreturn_t mlxsw_pci_eq_irq_handler(int irq, void *dev_id)
{
struct mlxsw_pci *mlxsw_pci = dev_id;
struct mlxsw_pci_queue *q;
int i;
for (i = 0; i < MLXSW_PCI_EQS_COUNT; i++) {
q = mlxsw_pci_eq_get(mlxsw_pci, i);
mlxsw_pci_queue_tasklet_schedule(q);
}
return IRQ_HANDLED;
}
static int mlxsw_pci_mbox_alloc(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_mem_item *mbox)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
int err = 0;
mbox->size = MLXSW_CMD_MBOX_SIZE;
mbox->buf = dma_alloc_coherent(&pdev->dev, MLXSW_CMD_MBOX_SIZE,
&mbox->mapaddr, GFP_KERNEL);
if (!mbox->buf) {
dev_err(&pdev->dev, "Failed allocating memory for mailbox\n");
err = -ENOMEM;
}
return err;
}
static void mlxsw_pci_mbox_free(struct mlxsw_pci *mlxsw_pci,
struct mlxsw_pci_mem_item *mbox)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
dma_free_coherent(&pdev->dev, MLXSW_CMD_MBOX_SIZE, mbox->buf,
mbox->mapaddr);
}
static int mlxsw_pci_sys_ready_wait(struct mlxsw_pci *mlxsw_pci,
const struct pci_device_id *id,
u32 *p_sys_status)
{
unsigned long end;
u32 val;
/* We must wait for the HW to become responsive. */
msleep(MLXSW_PCI_SW_RESET_WAIT_MSECS);
end = jiffies + msecs_to_jiffies(MLXSW_PCI_SW_RESET_TIMEOUT_MSECS);
do {
val = mlxsw_pci_read32(mlxsw_pci, FW_READY);
if ((val & MLXSW_PCI_FW_READY_MASK) == MLXSW_PCI_FW_READY_MAGIC)
return 0;
cond_resched();
} while (time_before(jiffies, end));
*p_sys_status = val & MLXSW_PCI_FW_READY_MASK;
return -EBUSY;
}
static int mlxsw_pci_sw_reset(struct mlxsw_pci *mlxsw_pci,
const struct pci_device_id *id)
{
struct pci_dev *pdev = mlxsw_pci->pdev;
char mrsr_pl[MLXSW_REG_MRSR_LEN];
u32 sys_status;
int err;
err = mlxsw_pci_sys_ready_wait(mlxsw_pci, id, &sys_status);
if (err) {
dev_err(&pdev->dev, "Failed to reach system ready status before reset. Status is 0x%x\n",
sys_status);
return err;
}
mlxsw_reg_mrsr_pack(mrsr_pl);
err = mlxsw_reg_write(mlxsw_pci->core, MLXSW_REG(mrsr), mrsr_pl);
if (err)
return err;
err = mlxsw_pci_sys_ready_wait(mlxsw_pci, id, &sys_status);
if (err) {
dev_err(&pdev->dev, "Failed to reach system ready status after reset. Status is 0x%x\n",
sys_status);
return err;
}
return 0;
}
static int mlxsw_pci_alloc_irq_vectors(struct mlxsw_pci *mlxsw_pci)
{
int err;
err = pci_alloc_irq_vectors(mlxsw_pci->pdev, 1, 1, PCI_IRQ_MSIX);
if (err < 0)
dev_err(&mlxsw_pci->pdev->dev, "MSI-X init failed\n");
return err;
}
static void mlxsw_pci_free_irq_vectors(struct mlxsw_pci *mlxsw_pci)
{
pci_free_irq_vectors(mlxsw_pci->pdev);
}
static int mlxsw_pci_init(void *bus_priv, struct mlxsw_core *mlxsw_core,
const struct mlxsw_config_profile *profile,
struct mlxsw_res *res)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
struct pci_dev *pdev = mlxsw_pci->pdev;
char *mbox;
u16 num_pages;
int err;
mlxsw_pci->core = mlxsw_core;
mbox = mlxsw_cmd_mbox_alloc();
if (!mbox)
return -ENOMEM;
err = mlxsw_pci_sw_reset(mlxsw_pci, mlxsw_pci->id);
if (err)
goto err_sw_reset;
err = mlxsw_pci_alloc_irq_vectors(mlxsw_pci);
if (err < 0) {
dev_err(&pdev->dev, "MSI-X init failed\n");
goto err_alloc_irq;
}
err = mlxsw_cmd_query_fw(mlxsw_core, mbox);
if (err)
goto err_query_fw;
mlxsw_pci->bus_info.fw_rev.major =
mlxsw_cmd_mbox_query_fw_fw_rev_major_get(mbox);
mlxsw_pci->bus_info.fw_rev.minor =
mlxsw_cmd_mbox_query_fw_fw_rev_minor_get(mbox);
mlxsw_pci->bus_info.fw_rev.subminor =
mlxsw_cmd_mbox_query_fw_fw_rev_subminor_get(mbox);
if (mlxsw_cmd_mbox_query_fw_cmd_interface_rev_get(mbox) != 1) {
dev_err(&pdev->dev, "Unsupported cmd interface revision ID queried from hw\n");
err = -EINVAL;
goto err_iface_rev;
}
if (mlxsw_cmd_mbox_query_fw_doorbell_page_bar_get(mbox) != 0) {
dev_err(&pdev->dev, "Unsupported doorbell page bar queried from hw\n");
err = -EINVAL;
goto err_doorbell_page_bar;
}
mlxsw_pci->doorbell_offset =
mlxsw_cmd_mbox_query_fw_doorbell_page_offset_get(mbox);
if (mlxsw_cmd_mbox_query_fw_fr_rn_clk_bar_get(mbox) != 0) {
dev_err(&pdev->dev, "Unsupported free running clock BAR queried from hw\n");
err = -EINVAL;
goto err_fr_rn_clk_bar;
}
mlxsw_pci->free_running_clock_offset =
mlxsw_cmd_mbox_query_fw_free_running_clock_offset_get(mbox);
if (mlxsw_cmd_mbox_query_fw_utc_sec_bar_get(mbox) != 0) {
dev_err(&pdev->dev, "Unsupported UTC sec BAR queried from hw\n");
err = -EINVAL;
goto err_utc_sec_bar;
}
mlxsw_pci->utc_sec_offset =
mlxsw_cmd_mbox_query_fw_utc_sec_offset_get(mbox);
if (mlxsw_cmd_mbox_query_fw_utc_nsec_bar_get(mbox) != 0) {
dev_err(&pdev->dev, "Unsupported UTC nsec BAR queried from hw\n");
err = -EINVAL;
goto err_utc_nsec_bar;
}
mlxsw_pci->utc_nsec_offset =
mlxsw_cmd_mbox_query_fw_utc_nsec_offset_get(mbox);
num_pages = mlxsw_cmd_mbox_query_fw_fw_pages_get(mbox);
err = mlxsw_pci_fw_area_init(mlxsw_pci, mbox, num_pages);
if (err)
goto err_fw_area_init;
err = mlxsw_pci_boardinfo(mlxsw_pci, mbox);
if (err)
goto err_boardinfo;
err = mlxsw_core_resources_query(mlxsw_core, mbox, res);
if (err)
goto err_query_resources;
if (MLXSW_CORE_RES_VALID(mlxsw_core, CQE_V2) &&
MLXSW_CORE_RES_GET(mlxsw_core, CQE_V2))
mlxsw_pci->max_cqe_ver = MLXSW_PCI_CQE_V2;
else if (MLXSW_CORE_RES_VALID(mlxsw_core, CQE_V1) &&
MLXSW_CORE_RES_GET(mlxsw_core, CQE_V1))
mlxsw_pci->max_cqe_ver = MLXSW_PCI_CQE_V1;
else if ((MLXSW_CORE_RES_VALID(mlxsw_core, CQE_V0) &&
MLXSW_CORE_RES_GET(mlxsw_core, CQE_V0)) ||
!MLXSW_CORE_RES_VALID(mlxsw_core, CQE_V0)) {
mlxsw_pci->max_cqe_ver = MLXSW_PCI_CQE_V0;
} else {
dev_err(&pdev->dev, "Invalid supported CQE version combination reported\n");
goto err_cqe_v_check;
}
err = mlxsw_pci_config_profile(mlxsw_pci, mbox, profile, res);
if (err)
goto err_config_profile;
/* Some resources depend on unified bridge model, which is configured
* as part of config_profile. Query the resources again to get correct
* values.
*/
err = mlxsw_core_resources_query(mlxsw_core, mbox, res);
if (err)
goto err_requery_resources;
err = mlxsw_pci_aqs_init(mlxsw_pci, mbox);
if (err)
goto err_aqs_init;
err = request_irq(pci_irq_vector(pdev, 0),
mlxsw_pci_eq_irq_handler, 0,
mlxsw_pci->bus_info.device_kind, mlxsw_pci);
if (err) {
dev_err(&pdev->dev, "IRQ request failed\n");
goto err_request_eq_irq;
}
goto mbox_put;
err_request_eq_irq:
mlxsw_pci_aqs_fini(mlxsw_pci);
err_aqs_init:
err_requery_resources:
err_config_profile:
err_cqe_v_check:
err_query_resources:
err_boardinfo:
mlxsw_pci_fw_area_fini(mlxsw_pci);
err_fw_area_init:
err_utc_nsec_bar:
err_utc_sec_bar:
err_fr_rn_clk_bar:
err_doorbell_page_bar:
err_iface_rev:
err_query_fw:
mlxsw_pci_free_irq_vectors(mlxsw_pci);
err_alloc_irq:
err_sw_reset:
mbox_put:
mlxsw_cmd_mbox_free(mbox);
return err;
}
static void mlxsw_pci_fini(void *bus_priv)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
free_irq(pci_irq_vector(mlxsw_pci->pdev, 0), mlxsw_pci);
mlxsw_pci_aqs_fini(mlxsw_pci);
mlxsw_pci_fw_area_fini(mlxsw_pci);
mlxsw_pci_free_irq_vectors(mlxsw_pci);
}
static struct mlxsw_pci_queue *
mlxsw_pci_sdq_pick(struct mlxsw_pci *mlxsw_pci,
const struct mlxsw_tx_info *tx_info)
{
u8 ctl_sdq_count = mlxsw_pci_sdq_count(mlxsw_pci) - 1;
u8 sdqn;
if (tx_info->is_emad) {
sdqn = MLXSW_PCI_SDQ_EMAD_INDEX;
} else {
BUILD_BUG_ON(MLXSW_PCI_SDQ_EMAD_INDEX != 0);
sdqn = 1 + (tx_info->local_port % ctl_sdq_count);
}
return mlxsw_pci_sdq_get(mlxsw_pci, sdqn);
}
static bool mlxsw_pci_skb_transmit_busy(void *bus_priv,
const struct mlxsw_tx_info *tx_info)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
struct mlxsw_pci_queue *q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
return !mlxsw_pci_queue_elem_info_producer_get(q);
}
static int mlxsw_pci_skb_transmit(void *bus_priv, struct sk_buff *skb,
const struct mlxsw_tx_info *tx_info)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
struct mlxsw_pci_queue *q;
struct mlxsw_pci_queue_elem_info *elem_info;
char *wqe;
int i;
int err;
if (skb_shinfo(skb)->nr_frags > MLXSW_PCI_WQE_SG_ENTRIES - 1) {
err = skb_linearize(skb);
if (err)
return err;
}
q = mlxsw_pci_sdq_pick(mlxsw_pci, tx_info);
spin_lock_bh(&q->lock);
elem_info = mlxsw_pci_queue_elem_info_producer_get(q);
if (!elem_info) {
/* queue is full */
err = -EAGAIN;
goto unlock;
}
mlxsw_skb_cb(skb)->tx_info = *tx_info;
elem_info->u.sdq.skb = skb;
wqe = elem_info->elem;
mlxsw_pci_wqe_c_set(wqe, 1); /* always report completion */
mlxsw_pci_wqe_lp_set(wqe, 0);
mlxsw_pci_wqe_type_set(wqe, MLXSW_PCI_WQE_TYPE_ETHERNET);
err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, 0, skb->data,
skb_headlen(skb), DMA_TO_DEVICE);
if (err)
goto unlock;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
err = mlxsw_pci_wqe_frag_map(mlxsw_pci, wqe, i + 1,
skb_frag_address(frag),
skb_frag_size(frag),
DMA_TO_DEVICE);
if (err)
goto unmap_frags;
}
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
/* Set unused sq entries byte count to zero. */
for (i++; i < MLXSW_PCI_WQE_SG_ENTRIES; i++)
mlxsw_pci_wqe_byte_count_set(wqe, i, 0);
/* Everything is set up, ring producer doorbell to get HW going */
q->producer_counter++;
mlxsw_pci_queue_doorbell_producer_ring(mlxsw_pci, q);
goto unlock;
unmap_frags:
for (; i >= 0; i--)
mlxsw_pci_wqe_frag_unmap(mlxsw_pci, wqe, i, DMA_TO_DEVICE);
unlock:
spin_unlock_bh(&q->lock);
return err;
}
static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, u8 opcode_mod,
u32 in_mod, bool out_mbox_direct,
char *in_mbox, size_t in_mbox_size,
char *out_mbox, size_t out_mbox_size,
u8 *p_status)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
dma_addr_t in_mapaddr = 0, out_mapaddr = 0;
bool evreq = mlxsw_pci->cmd.nopoll;
unsigned long timeout = msecs_to_jiffies(MLXSW_PCI_CIR_TIMEOUT_MSECS);
bool *p_wait_done = &mlxsw_pci->cmd.wait_done;
int err;
*p_status = MLXSW_CMD_STATUS_OK;
err = mutex_lock_interruptible(&mlxsw_pci->cmd.lock);
if (err)
return err;
if (in_mbox) {
memcpy(mlxsw_pci->cmd.in_mbox.buf, in_mbox, in_mbox_size);
in_mapaddr = mlxsw_pci->cmd.in_mbox.mapaddr;
}
mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, upper_32_bits(in_mapaddr));
mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, lower_32_bits(in_mapaddr));
if (out_mbox)
out_mapaddr = mlxsw_pci->cmd.out_mbox.mapaddr;
mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, upper_32_bits(out_mapaddr));
mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, lower_32_bits(out_mapaddr));
mlxsw_pci_write32(mlxsw_pci, CIR_IN_MODIFIER, in_mod);
mlxsw_pci_write32(mlxsw_pci, CIR_TOKEN, 0);
*p_wait_done = false;
wmb(); /* all needs to be written before we write control register */
mlxsw_pci_write32(mlxsw_pci, CIR_CTRL,
MLXSW_PCI_CIR_CTRL_GO_BIT |
(evreq ? MLXSW_PCI_CIR_CTRL_EVREQ_BIT : 0) |
(opcode_mod << MLXSW_PCI_CIR_CTRL_OPCODE_MOD_SHIFT) |
opcode);
if (!evreq) {
unsigned long end;
end = jiffies + timeout;
do {
u32 ctrl = mlxsw_pci_read32(mlxsw_pci, CIR_CTRL);
if (!(ctrl & MLXSW_PCI_CIR_CTRL_GO_BIT)) {
*p_wait_done = true;
*p_status = ctrl >> MLXSW_PCI_CIR_CTRL_STATUS_SHIFT;
break;
}
cond_resched();
} while (time_before(jiffies, end));
} else {
wait_event_timeout(mlxsw_pci->cmd.wait, *p_wait_done, timeout);
*p_status = mlxsw_pci->cmd.comp.status;
}
err = 0;
if (*p_wait_done) {
if (*p_status)
err = -EIO;
} else {
err = -ETIMEDOUT;
}
if (!err && out_mbox && out_mbox_direct) {
/* Some commands don't use output param as address to mailbox
* but they store output directly into registers. In that case,
* copy registers into mbox buffer.
*/
__be32 tmp;
if (!evreq) {
tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
CIR_OUT_PARAM_HI));
memcpy(out_mbox, &tmp, sizeof(tmp));
tmp = cpu_to_be32(mlxsw_pci_read32(mlxsw_pci,
CIR_OUT_PARAM_LO));
memcpy(out_mbox + sizeof(tmp), &tmp, sizeof(tmp));
}
} else if (!err && out_mbox) {
memcpy(out_mbox, mlxsw_pci->cmd.out_mbox.buf, out_mbox_size);
}
mutex_unlock(&mlxsw_pci->cmd.lock);
return err;
}
static u32 mlxsw_pci_read_frc_h(void *bus_priv)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
u64 frc_offset_h;
frc_offset_h = mlxsw_pci->free_running_clock_offset;
return mlxsw_pci_read32_off(mlxsw_pci, frc_offset_h);
}
static u32 mlxsw_pci_read_frc_l(void *bus_priv)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
u64 frc_offset_l;
frc_offset_l = mlxsw_pci->free_running_clock_offset + 4;
return mlxsw_pci_read32_off(mlxsw_pci, frc_offset_l);
}
static u32 mlxsw_pci_read_utc_sec(void *bus_priv)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
return mlxsw_pci_read32_off(mlxsw_pci, mlxsw_pci->utc_sec_offset);
}
static u32 mlxsw_pci_read_utc_nsec(void *bus_priv)
{
struct mlxsw_pci *mlxsw_pci = bus_priv;
return mlxsw_pci_read32_off(mlxsw_pci, mlxsw_pci->utc_nsec_offset);
}
static const struct mlxsw_bus mlxsw_pci_bus = {
.kind = "pci",
.init = mlxsw_pci_init,
.fini = mlxsw_pci_fini,
.skb_transmit_busy = mlxsw_pci_skb_transmit_busy,
.skb_transmit = mlxsw_pci_skb_transmit,
.cmd_exec = mlxsw_pci_cmd_exec,
.read_frc_h = mlxsw_pci_read_frc_h,
.read_frc_l = mlxsw_pci_read_frc_l,
.read_utc_sec = mlxsw_pci_read_utc_sec,
.read_utc_nsec = mlxsw_pci_read_utc_nsec,
.features = MLXSW_BUS_F_TXRX | MLXSW_BUS_F_RESET,
};
static int mlxsw_pci_cmd_init(struct mlxsw_pci *mlxsw_pci)
{
int err;
mutex_init(&mlxsw_pci->cmd.lock);
init_waitqueue_head(&mlxsw_pci->cmd.wait);
err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
if (err)
goto err_in_mbox_alloc;
err = mlxsw_pci_mbox_alloc(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
if (err)
goto err_out_mbox_alloc;
return 0;
err_out_mbox_alloc:
mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
err_in_mbox_alloc:
mutex_destroy(&mlxsw_pci->cmd.lock);
return err;
}
static void mlxsw_pci_cmd_fini(struct mlxsw_pci *mlxsw_pci)
{
mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.out_mbox);
mlxsw_pci_mbox_free(mlxsw_pci, &mlxsw_pci->cmd.in_mbox);
mutex_destroy(&mlxsw_pci->cmd.lock);
}
static int mlxsw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
const char *driver_name = dev_driver_string(&pdev->dev);
struct mlxsw_pci *mlxsw_pci;
int err;
mlxsw_pci = kzalloc(sizeof(*mlxsw_pci), GFP_KERNEL);
if (!mlxsw_pci)
return -ENOMEM;
err = pci_enable_device(pdev);
if (err) {
dev_err(&pdev->dev, "pci_enable_device failed\n");
goto err_pci_enable_device;
}
err = pci_request_regions(pdev, driver_name);
if (err) {
dev_err(&pdev->dev, "pci_request_regions failed\n");
goto err_pci_request_regions;
}
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
if (err) {
err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
if (err) {
dev_err(&pdev->dev, "dma_set_mask failed\n");
goto err_pci_set_dma_mask;
}
}
if (pci_resource_len(pdev, 0) < MLXSW_PCI_BAR0_SIZE) {
dev_err(&pdev->dev, "invalid PCI region size\n");
err = -EINVAL;
goto err_pci_resource_len_check;
}
mlxsw_pci->hw_addr = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!mlxsw_pci->hw_addr) {
dev_err(&pdev->dev, "ioremap failed\n");
err = -EIO;
goto err_ioremap;
}
pci_set_master(pdev);
mlxsw_pci->pdev = pdev;
pci_set_drvdata(pdev, mlxsw_pci);
err = mlxsw_pci_cmd_init(mlxsw_pci);
if (err)
goto err_pci_cmd_init;
mlxsw_pci->bus_info.device_kind = driver_name;
mlxsw_pci->bus_info.device_name = pci_name(mlxsw_pci->pdev);
mlxsw_pci->bus_info.dev = &pdev->dev;
mlxsw_pci->bus_info.read_clock_capable = true;
mlxsw_pci->id = id;
err = mlxsw_core_bus_device_register(&mlxsw_pci->bus_info,
&mlxsw_pci_bus, mlxsw_pci, false,
NULL, NULL);
if (err) {
dev_err(&pdev->dev, "cannot register bus device\n");
goto err_bus_device_register;
}
return 0;
err_bus_device_register:
mlxsw_pci_cmd_fini(mlxsw_pci);
err_pci_cmd_init:
iounmap(mlxsw_pci->hw_addr);
err_ioremap:
err_pci_resource_len_check:
err_pci_set_dma_mask:
pci_release_regions(pdev);
err_pci_request_regions:
pci_disable_device(pdev);
err_pci_enable_device:
kfree(mlxsw_pci);
return err;
}
static void mlxsw_pci_remove(struct pci_dev *pdev)
{
struct mlxsw_pci *mlxsw_pci = pci_get_drvdata(pdev);
mlxsw_core_bus_device_unregister(mlxsw_pci->core, false);
mlxsw_pci_cmd_fini(mlxsw_pci);
iounmap(mlxsw_pci->hw_addr);
pci_release_regions(mlxsw_pci->pdev);
pci_disable_device(mlxsw_pci->pdev);
kfree(mlxsw_pci);
}
int mlxsw_pci_driver_register(struct pci_driver *pci_driver)
{
pci_driver->probe = mlxsw_pci_probe;
pci_driver->remove = mlxsw_pci_remove;
pci_driver->shutdown = mlxsw_pci_remove;
return pci_register_driver(pci_driver);
}
EXPORT_SYMBOL(mlxsw_pci_driver_register);
void mlxsw_pci_driver_unregister(struct pci_driver *pci_driver)
{
pci_unregister_driver(pci_driver);
}
EXPORT_SYMBOL(mlxsw_pci_driver_unregister);
static int __init mlxsw_pci_module_init(void)
{
return 0;
}
static void __exit mlxsw_pci_module_exit(void)
{
}
module_init(mlxsw_pci_module_init);
module_exit(mlxsw_pci_module_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Mellanox switch PCI interface driver");