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/*
* Huawei HiNIC PCI Express Linux driver
* Copyright(c) 2017 Huawei Technologies Co., Ltd
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/semaphore.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/err.h>
#include "hinic_hw_if.h"
#include "hinic_hw_eqs.h"
#include "hinic_hw_wqe.h"
#include "hinic_hw_wq.h"
#include "hinic_hw_cmdq.h"
#include "hinic_hw_qp_ctxt.h"
#include "hinic_hw_qp.h"
#include "hinic_hw_io.h"
#define CI_Q_ADDR_SIZE sizeof(u32)
#define CI_ADDR(base_addr, q_id) ((base_addr) + \
(q_id) * CI_Q_ADDR_SIZE)
#define CI_TABLE_SIZE(num_qps) ((num_qps) * CI_Q_ADDR_SIZE)
#define DB_IDX(db, db_base) \
(((unsigned long)(db) - (unsigned long)(db_base)) / HINIC_DB_PAGE_SIZE)
enum io_cmd {
IO_CMD_MODIFY_QUEUE_CTXT = 0,
IO_CMD_CLEAN_QUEUE_CTXT,
};
static void init_db_area_idx(struct hinic_free_db_area *free_db_area)
{
int i;
for (i = 0; i < HINIC_DB_MAX_AREAS; i++)
free_db_area->db_idx[i] = i;
free_db_area->alloc_pos = 0;
free_db_area->return_pos = HINIC_DB_MAX_AREAS;
free_db_area->num_free = HINIC_DB_MAX_AREAS;
sema_init(&free_db_area->idx_lock, 1);
}
static void __iomem *get_db_area(struct hinic_func_to_io *func_to_io)
{
struct hinic_free_db_area *free_db_area = &func_to_io->free_db_area;
int pos, idx;
down(&free_db_area->idx_lock);
free_db_area->num_free--;
if (free_db_area->num_free < 0) {
free_db_area->num_free++;
up(&free_db_area->idx_lock);
return ERR_PTR(-ENOMEM);
}
pos = free_db_area->alloc_pos++;
pos &= HINIC_DB_MAX_AREAS - 1;
idx = free_db_area->db_idx[pos];
free_db_area->db_idx[pos] = -1;
up(&free_db_area->idx_lock);
return func_to_io->db_base + idx * HINIC_DB_PAGE_SIZE;
}
static void return_db_area(struct hinic_func_to_io *func_to_io,
void __iomem *db_base)
{
struct hinic_free_db_area *free_db_area = &func_to_io->free_db_area;
int pos, idx = DB_IDX(db_base, func_to_io->db_base);
down(&free_db_area->idx_lock);
pos = free_db_area->return_pos++;
pos &= HINIC_DB_MAX_AREAS - 1;
free_db_area->db_idx[pos] = idx;
free_db_area->num_free++;
up(&free_db_area->idx_lock);
}
static int write_sq_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
u16 num_sqs)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct hinic_sq_ctxt_block *sq_ctxt_block;
struct pci_dev *pdev = hwif->pdev;
struct hinic_cmdq_buf cmdq_buf;
struct hinic_sq_ctxt *sq_ctxt;
struct hinic_qp *qp;
u64 out_param;
int err, i;
err = hinic_alloc_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
if (err) {
dev_err(&pdev->dev, "Failed to allocate cmdq buf\n");
return err;
}
sq_ctxt_block = cmdq_buf.buf;
sq_ctxt = sq_ctxt_block->sq_ctxt;
hinic_qp_prepare_header(&sq_ctxt_block->hdr, HINIC_QP_CTXT_TYPE_SQ,
num_sqs, func_to_io->max_qps);
for (i = 0; i < num_sqs; i++) {
qp = &func_to_io->qps[i];
hinic_sq_prepare_ctxt(&sq_ctxt[i], &qp->sq,
base_qpn + qp->q_id);
}
cmdq_buf.size = HINIC_SQ_CTXT_SIZE(num_sqs);
err = hinic_cmdq_direct_resp(&func_to_io->cmdqs, HINIC_MOD_L2NIC,
IO_CMD_MODIFY_QUEUE_CTXT, &cmdq_buf,
&out_param);
if ((err) || (out_param != 0)) {
dev_err(&pdev->dev, "Failed to set SQ ctxts\n");
err = -EFAULT;
}
hinic_free_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
return err;
}
static int write_rq_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
u16 num_rqs)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct hinic_rq_ctxt_block *rq_ctxt_block;
struct pci_dev *pdev = hwif->pdev;
struct hinic_cmdq_buf cmdq_buf;
struct hinic_rq_ctxt *rq_ctxt;
struct hinic_qp *qp;
u64 out_param;
int err, i;
err = hinic_alloc_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
if (err) {
dev_err(&pdev->dev, "Failed to allocate cmdq buf\n");
return err;
}
rq_ctxt_block = cmdq_buf.buf;
rq_ctxt = rq_ctxt_block->rq_ctxt;
hinic_qp_prepare_header(&rq_ctxt_block->hdr, HINIC_QP_CTXT_TYPE_RQ,
num_rqs, func_to_io->max_qps);
for (i = 0; i < num_rqs; i++) {
qp = &func_to_io->qps[i];
hinic_rq_prepare_ctxt(&rq_ctxt[i], &qp->rq,
base_qpn + qp->q_id);
}
cmdq_buf.size = HINIC_RQ_CTXT_SIZE(num_rqs);
err = hinic_cmdq_direct_resp(&func_to_io->cmdqs, HINIC_MOD_L2NIC,
IO_CMD_MODIFY_QUEUE_CTXT, &cmdq_buf,
&out_param);
if ((err) || (out_param != 0)) {
dev_err(&pdev->dev, "Failed to set RQ ctxts\n");
err = -EFAULT;
}
hinic_free_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
return err;
}
/**
* write_qp_ctxts - write the qp ctxt to HW
* @func_to_io: func to io channel that holds the IO components
* @base_qpn: first qp number
* @num_qps: number of qps to write
*
* Return 0 - Success, negative - Failure
**/
static int write_qp_ctxts(struct hinic_func_to_io *func_to_io, u16 base_qpn,
u16 num_qps)
{
return (write_sq_ctxts(func_to_io, base_qpn, num_qps) ||
write_rq_ctxts(func_to_io, base_qpn, num_qps));
}
static int hinic_clean_queue_offload_ctxt(struct hinic_func_to_io *func_to_io,
enum hinic_qp_ctxt_type ctxt_type)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct hinic_clean_queue_ctxt *ctxt_block;
struct pci_dev *pdev = hwif->pdev;
struct hinic_cmdq_buf cmdq_buf;
u64 out_param = 0;
int err;
err = hinic_alloc_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
if (err) {
dev_err(&pdev->dev, "Failed to allocate cmdq buf\n");
return err;
}
ctxt_block = cmdq_buf.buf;
ctxt_block->cmdq_hdr.num_queues = func_to_io->max_qps;
ctxt_block->cmdq_hdr.queue_type = ctxt_type;
ctxt_block->cmdq_hdr.addr_offset = 0;
/* TSO/LRO ctxt size: 0x0:0B; 0x1:160B; 0x2:200B; 0x3:240B */
ctxt_block->ctxt_size = 0x3;
hinic_cpu_to_be32(ctxt_block, sizeof(*ctxt_block));
cmdq_buf.size = sizeof(*ctxt_block);
err = hinic_cmdq_direct_resp(&func_to_io->cmdqs, HINIC_MOD_L2NIC,
IO_CMD_CLEAN_QUEUE_CTXT,
&cmdq_buf, &out_param);
if (err || out_param) {
dev_err(&pdev->dev, "Failed to clean offload ctxts, err: %d, out_param: 0x%llx\n",
err, out_param);
err = -EFAULT;
}
hinic_free_cmdq_buf(&func_to_io->cmdqs, &cmdq_buf);
return err;
}
static int hinic_clean_qp_offload_ctxt(struct hinic_func_to_io *func_to_io)
{
/* clean LRO/TSO context space */
return (hinic_clean_queue_offload_ctxt(func_to_io,
HINIC_QP_CTXT_TYPE_SQ) ||
hinic_clean_queue_offload_ctxt(func_to_io,
HINIC_QP_CTXT_TYPE_RQ));
}
/**
* init_qp - Initialize a Queue Pair
* @func_to_io: func to io channel that holds the IO components
* @qp: pointer to the qp to initialize
* @q_id: the id of the qp
* @sq_msix_entry: msix entry for sq
* @rq_msix_entry: msix entry for rq
*
* Return 0 - Success, negative - Failure
**/
static int init_qp(struct hinic_func_to_io *func_to_io,
struct hinic_qp *qp, int q_id,
struct msix_entry *sq_msix_entry,
struct msix_entry *rq_msix_entry)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
void __iomem *db_base;
int err;
qp->q_id = q_id;
err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->sq_wq[q_id],
HINIC_SQ_WQEBB_SIZE, HINIC_SQ_PAGE_SIZE,
HINIC_SQ_DEPTH, HINIC_SQ_WQE_MAX_SIZE);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQ for SQ\n");
return err;
}
err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->rq_wq[q_id],
HINIC_RQ_WQEBB_SIZE, HINIC_RQ_PAGE_SIZE,
HINIC_RQ_DEPTH, HINIC_RQ_WQE_SIZE);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQ for RQ\n");
goto err_rq_alloc;
}
db_base = get_db_area(func_to_io);
if (IS_ERR(db_base)) {
dev_err(&pdev->dev, "Failed to get DB area for SQ\n");
err = PTR_ERR(db_base);
goto err_get_db;
}
func_to_io->sq_db[q_id] = db_base;
err = hinic_init_sq(&qp->sq, hwif, &func_to_io->sq_wq[q_id],
sq_msix_entry,
CI_ADDR(func_to_io->ci_addr_base, q_id),
CI_ADDR(func_to_io->ci_dma_base, q_id), db_base);
if (err) {
dev_err(&pdev->dev, "Failed to init SQ\n");
goto err_sq_init;
}
err = hinic_init_rq(&qp->rq, hwif, &func_to_io->rq_wq[q_id],
rq_msix_entry);
if (err) {
dev_err(&pdev->dev, "Failed to init RQ\n");
goto err_rq_init;
}
return 0;
err_rq_init:
hinic_clean_sq(&qp->sq);
err_sq_init:
return_db_area(func_to_io, db_base);
err_get_db:
hinic_wq_free(&func_to_io->wqs, &func_to_io->rq_wq[q_id]);
err_rq_alloc:
hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
return err;
}
/**
* destroy_qp - Clean the resources of a Queue Pair
* @func_to_io: func to io channel that holds the IO components
* @qp: pointer to the qp to clean
**/
static void destroy_qp(struct hinic_func_to_io *func_to_io,
struct hinic_qp *qp)
{
int q_id = qp->q_id;
hinic_clean_rq(&qp->rq);
hinic_clean_sq(&qp->sq);
return_db_area(func_to_io, func_to_io->sq_db[q_id]);
hinic_wq_free(&func_to_io->wqs, &func_to_io->rq_wq[q_id]);
hinic_wq_free(&func_to_io->wqs, &func_to_io->sq_wq[q_id]);
}
/**
* hinic_io_create_qps - Create Queue Pairs
* @func_to_io: func to io channel that holds the IO components
* @base_qpn: base qp number
* @num_qps: number queue pairs to create
* @sq_msix_entry: msix entries for sq
* @rq_msix_entry: msix entries for rq
*
* Return 0 - Success, negative - Failure
**/
int hinic_io_create_qps(struct hinic_func_to_io *func_to_io,
u16 base_qpn, int num_qps,
struct msix_entry *sq_msix_entries,
struct msix_entry *rq_msix_entries)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
size_t qps_size, wq_size, db_size;
void *ci_addr_base;
int i, j, err;
qps_size = num_qps * sizeof(*func_to_io->qps);
func_to_io->qps = devm_kzalloc(&pdev->dev, qps_size, GFP_KERNEL);
if (!func_to_io->qps)
return -ENOMEM;
wq_size = num_qps * sizeof(*func_to_io->sq_wq);
func_to_io->sq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
if (!func_to_io->sq_wq) {
err = -ENOMEM;
goto err_sq_wq;
}
wq_size = num_qps * sizeof(*func_to_io->rq_wq);
func_to_io->rq_wq = devm_kzalloc(&pdev->dev, wq_size, GFP_KERNEL);
if (!func_to_io->rq_wq) {
err = -ENOMEM;
goto err_rq_wq;
}
db_size = num_qps * sizeof(*func_to_io->sq_db);
func_to_io->sq_db = devm_kzalloc(&pdev->dev, db_size, GFP_KERNEL);
if (!func_to_io->sq_db) {
err = -ENOMEM;
goto err_sq_db;
}
ci_addr_base = dma_alloc_coherent(&pdev->dev, CI_TABLE_SIZE(num_qps),
&func_to_io->ci_dma_base,
GFP_KERNEL);
if (!ci_addr_base) {
dev_err(&pdev->dev, "Failed to allocate CI area\n");
err = -ENOMEM;
goto err_ci_base;
}
func_to_io->ci_addr_base = ci_addr_base;
for (i = 0; i < num_qps; i++) {
err = init_qp(func_to_io, &func_to_io->qps[i], i,
&sq_msix_entries[i], &rq_msix_entries[i]);
if (err) {
dev_err(&pdev->dev, "Failed to create QP %d\n", i);
goto err_init_qp;
}
}
err = write_qp_ctxts(func_to_io, base_qpn, num_qps);
if (err) {
dev_err(&pdev->dev, "Failed to init QP ctxts\n");
goto err_write_qp_ctxts;
}
err = hinic_clean_qp_offload_ctxt(func_to_io);
if (err) {
dev_err(&pdev->dev, "Failed to clean QP contexts space\n");
goto err_write_qp_ctxts;
}
return 0;
err_write_qp_ctxts:
err_init_qp:
for (j = 0; j < i; j++)
destroy_qp(func_to_io, &func_to_io->qps[j]);
dma_free_coherent(&pdev->dev, CI_TABLE_SIZE(num_qps),
func_to_io->ci_addr_base, func_to_io->ci_dma_base);
err_ci_base:
devm_kfree(&pdev->dev, func_to_io->sq_db);
err_sq_db:
devm_kfree(&pdev->dev, func_to_io->rq_wq);
err_rq_wq:
devm_kfree(&pdev->dev, func_to_io->sq_wq);
err_sq_wq:
devm_kfree(&pdev->dev, func_to_io->qps);
return err;
}
/**
* hinic_io_destroy_qps - Destroy the IO Queue Pairs
* @func_to_io: func to io channel that holds the IO components
* @num_qps: number queue pairs to destroy
**/
void hinic_io_destroy_qps(struct hinic_func_to_io *func_to_io, int num_qps)
{
struct hinic_hwif *hwif = func_to_io->hwif;
struct pci_dev *pdev = hwif->pdev;
size_t ci_table_size;
int i;
ci_table_size = CI_TABLE_SIZE(num_qps);
for (i = 0; i < num_qps; i++)
destroy_qp(func_to_io, &func_to_io->qps[i]);
dma_free_coherent(&pdev->dev, ci_table_size, func_to_io->ci_addr_base,
func_to_io->ci_dma_base);
devm_kfree(&pdev->dev, func_to_io->sq_db);
devm_kfree(&pdev->dev, func_to_io->rq_wq);
devm_kfree(&pdev->dev, func_to_io->sq_wq);
devm_kfree(&pdev->dev, func_to_io->qps);
}
/**
* hinic_io_init - Initialize the IO components
* @func_to_io: func to io channel that holds the IO components
* @hwif: HW interface for accessing IO
* @max_qps: maximum QPs in HW
* @num_ceqs: number completion event queues
* @ceq_msix_entries: msix entries for ceqs
*
* Return 0 - Success, negative - Failure
**/
int hinic_io_init(struct hinic_func_to_io *func_to_io,
struct hinic_hwif *hwif, u16 max_qps, int num_ceqs,
struct msix_entry *ceq_msix_entries)
{
struct pci_dev *pdev = hwif->pdev;
enum hinic_cmdq_type cmdq, type;
void __iomem *db_area;
int err;
func_to_io->hwif = hwif;
func_to_io->qps = NULL;
func_to_io->max_qps = max_qps;
err = hinic_ceqs_init(&func_to_io->ceqs, hwif, num_ceqs,
HINIC_DEFAULT_CEQ_LEN, HINIC_EQ_PAGE_SIZE,
ceq_msix_entries);
if (err) {
dev_err(&pdev->dev, "Failed to init CEQs\n");
return err;
}
err = hinic_wqs_alloc(&func_to_io->wqs, 2 * max_qps, hwif);
if (err) {
dev_err(&pdev->dev, "Failed to allocate WQS for IO\n");
goto err_wqs_alloc;
}
func_to_io->db_base = pci_ioremap_bar(pdev, HINIC_PCI_DB_BAR);
if (!func_to_io->db_base) {
dev_err(&pdev->dev, "Failed to remap IO DB area\n");
err = -ENOMEM;
goto err_db_ioremap;
}
init_db_area_idx(&func_to_io->free_db_area);
for (cmdq = HINIC_CMDQ_SYNC; cmdq < HINIC_MAX_CMDQ_TYPES; cmdq++) {
db_area = get_db_area(func_to_io);
if (IS_ERR(db_area)) {
dev_err(&pdev->dev, "Failed to get cmdq db area\n");
err = PTR_ERR(db_area);
goto err_db_area;
}
func_to_io->cmdq_db_area[cmdq] = db_area;
}
err = hinic_init_cmdqs(&func_to_io->cmdqs, hwif,
func_to_io->cmdq_db_area);
if (err) {
dev_err(&pdev->dev, "Failed to initialize cmdqs\n");
goto err_init_cmdqs;
}
return 0;
err_init_cmdqs:
err_db_area:
for (type = HINIC_CMDQ_SYNC; type < cmdq; type++)
return_db_area(func_to_io, func_to_io->cmdq_db_area[type]);
iounmap(func_to_io->db_base);
err_db_ioremap:
hinic_wqs_free(&func_to_io->wqs);
err_wqs_alloc:
hinic_ceqs_free(&func_to_io->ceqs);
return err;
}
/**
* hinic_io_free - Free the IO components
* @func_to_io: func to io channel that holds the IO components
**/
void hinic_io_free(struct hinic_func_to_io *func_to_io)
{
enum hinic_cmdq_type cmdq;
hinic_free_cmdqs(&func_to_io->cmdqs);
for (cmdq = HINIC_CMDQ_SYNC; cmdq < HINIC_MAX_CMDQ_TYPES; cmdq++)
return_db_area(func_to_io, func_to_io->cmdq_db_area[cmdq]);
iounmap(func_to_io->db_base);
hinic_wqs_free(&func_to_io->wqs);
hinic_ceqs_free(&func_to_io->ceqs);
}
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