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epfront_transfer.c
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epfront_transfer.c
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/*----------------------------------------------------------------------------
* Copyright (c) <2016-2017>, <Huawei Technologies Co., Ltd>
* All rights reserved.
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific prior written
* permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORSz
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*---------------------------------------------------------------------------*/
#include "epfront.h"
#include <linux/pci.h>
#include <linux/aer.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
#include <linux/sched/signal.h>
#endif
enum sdi_system_states{
SDI_SYSTEM_BOOTING,
SDI_SYSTEM_RUNNING,
SDI_SYSTEM_HALT,
SDI_SYSTEM_POWER_OFF,
SDI_SYSTEM_RESTART,
SDI_SYSTEM_STATE_NO_SUPPORT=255,
};
#define EPFRONT_STATES_ARRAY_MAX_LENGTH (9)
static int epfront_system_states_array[]={
SDI_SYSTEM_BOOTING,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,13,0)
SDI_SYSTEM_STATE_NO_SUPPORT,
#endif
SDI_SYSTEM_RUNNING,
SDI_SYSTEM_HALT,
SDI_SYSTEM_POWER_OFF,
SDI_SYSTEM_RESTART,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,18,0)
SDI_SYSTEM_STATE_NO_SUPPORT,
#endif
SDI_SYSTEM_STATE_NO_SUPPORT,
SDI_SYSTEM_STATE_NO_SUPPORT,
};
#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2, 6, 32) && !defined(RHEL_RELEASE))
/*****************************************************************************
Function : pcie_capability_read_word
Description : get pci capability and read config word
Input : struct pci_dev * dev
int pos
u16 * val
Output : int
Return : int
*****************************************************************************/
static int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val)
{
int ret;
int pcie_cap_reg;
*val = 0;
if (pos & 1)
return -EINVAL;
pcie_cap_reg = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pcie_cap_reg <= 0) {
epfront_err_limit("pci_find_capability failed");
return -EFAULT;
}
ret = pci_read_config_word(dev, pcie_cap_reg + pos, val);
/*
* Reset *val to 0 if pci_read_config_dword() fails, it may
* have been written as 0xFFFFFFFF if hardware error happens
* during pci_read_config_dword().
*/
if (ret)
*val = 0;
return ret;
}
/*****************************************************************************
Function : pcie_capability_write_word
Description : get pci capability and write config word
Input : struct pci_dev * dev
int pos
u16 val
Output : int
Return : int
*****************************************************************************/
static int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val)
{
int pcie_cap_reg;
if (pos & 1)
return -EINVAL;
pcie_cap_reg = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pcie_cap_reg <= 0) {
epfront_err_limit("pci_find_capability failed");
return -EFAULT;
}
return pci_write_config_word(dev, pcie_cap_reg + pos, val);
}
/*****************************************************************************
Function : pcie_capability_clear_and_set_word
Description : get pci capability and clear it by write word
Input : struct pci_dev * dev
int pos
u16 clear
u16 set
Output : int
Return : int
*****************************************************************************/
static int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
u16 clear, u16 set)
{
int ret;
u16 val;
ret = pcie_capability_read_word(dev, pos, &val);
if (!ret) {
val &= ~clear;
val |= set;
ret = pcie_capability_write_word(dev, pos, val);
}
return ret;
}
#endif
#define SDI_Q_MAX_DEPTH 4096
static int total_num = 0;
static sdi_pdev_info_t gsdev[SDI_MAX_NRS];
#ifdef TEST_BY_NVME
#define PCI_CLASS_STORAGE_EXPRESS 0x010802
#endif
#define SDI_DEVICE_ID_1610 0x1610
#define SDI_VENDOR_ID 0x19e5
#define PCIE_AER_REG 0x3c
#define PCIE_AER_ENABLE 17
/**
* PCI_DEVICE - macro used to describe a specific pci device
* @subdev: the 16 bit PCI sub system ID
*
* This macro is used to create a struct pci_device_id that matches a
* specific device. The subvendor fields will be set to
* PCI_ANY_ID.
*/
#define SDI_PCI_DEVICE(subdev) {\
.vendor = (SDI_VENDOR_ID), .device = (SDI_DEVICE_ID_1610), \
.subvendor = PCI_ANY_ID, .subdevice = (subdev) }
#define SDI_PF0_SUBDEV 0
#define SDI_PF1_SUBDEV 1
#define SDI_PF2_SUBDEV 2
#define CHECK_LINK_TIMEOUT_NUM 60
#define CHECK_LINK_WAITTIME 100
#define LINK_CHECK_STATE 0xFFFFFFFF
#define HEATBEAT_WAITTIME 1000
#define ARM_SDIEP_PROBE_WAITTIME 1000
#define AER_WAITTIME 1000
#define AER_WAITNUM 180
/*
* perceiving restart needs 60s wait time to process,
* wait for arm reboot process and complete ep init.
*/
#define SDI_RESET_WAITTIME 90
#define HEATBEAT_TIMEOUT_NUM 3
#define UPDATE_WAIT_TIME 1
#define WAIT_COMPLETE_TIME 10000
#define WAIT_COMPLETE_NUM 10
#define WAIT_READY_TIMEOUT (10 * HZ)
#define WAIT_FRONT_RMMOD_TIMEOUT 10000
#define WAIT_FRONT_RMMOD_TIMENUM 12
#define WAIT_HEARTBEAT_2_NORMAL 1000
/* only matching SDI PF1 PF2 device.
* when enable IOMMU, if match PF0 device, probe will failed
* and cause IOMMU issue when PF1/2 using DMA.
*/
static struct pci_device_id sdi_pf12_pci_tbl[] = {
SDI_PCI_DEVICE(SDI_PF0_SUBDEV),
SDI_PCI_DEVICE(SDI_PF1_SUBDEV),
SDI_PCI_DEVICE(SDI_PF2_SUBDEV),
{0, }
};
MODULE_DEVICE_TABLE(pci, sdi_pf12_pci_tbl);
static void sdi_aq_remove (struct sdi_pdev_info *sdev);
static int gdev_list_add(struct sdi_pdev_info *sdev);
static void gdev_list_remove(struct sdi_pdev_info *sdev);
static int heartbeat_thread_add(struct sdi_pdev_info *sdev);
static void heartbeat_thread_remove(struct sdi_pdev_info *sdev);
static int update_thread_add(struct sdi_pdev_info *sdev);
static void update_thread_remove(struct sdi_pdev_info *sdev);
static int reset_thread_add(struct sdi_pdev_info *sdev);
static void reset_thread_remove(struct sdi_pdev_info *sdev);
static int sdi_start_probeep_thd(struct sdi_pdev_info *sdev);
static void sdi_admin_cancel_ios(sdi_admin_queue_t *admin_queue, bool timeout);
static int sdi_submit_admin_cmd(sdi_pdev_info_t *sdev, struct sdi_admin_command *cmd,u32 *result, unsigned timeout);
static void sdi_dev_shutdown(struct sdi_pdev_info *sdev);
static int heartbeat_kthread(void *data);
static int update_kthread(void *data);
static int reset_kthread(void *data);
static void transfer_do_aer_set(struct pci_dev *pdev, u32 enable);
enum
{
SYNC_UCMD_USING_DMA,
SYNC_UCMD_USING_PIO
};
enum {
SDI_QUEUE_PHYS_CONTIG = (1 << 0),
SDI_CQ_IRQ_ENABLED = (1 << 1)
};
/*****************************************************************************
Function : ep_get_sdi_dev
Description : get sdi device
Input : void
Output : sdi_pdev_info_t*
Return : sdi_pdev_info_t*
*****************************************************************************/
sdi_pdev_info_t* ep_get_sdi_dev(unsigned int idx)
{
if (idx >= SDI_MAX_NRS)
return NULL;
return &gsdev[idx];
}
/*****************************************************************************
Function : sdi_setup_sgl
Description : setup sgl
Input : struct sdi_iod * iod
u32 len
gfp_t gfp
Output : int
Return : int
*****************************************************************************/
int sdi_setup_sgl(struct cmnd_dma *dma_info, struct scatterlist *sg, int nents, u32 len)
{
//sdi_pdev_info_t *spdev = sdev;
//struct dma_pool *pool;
u32 i;
int status;
unsigned int dma_len;
int length;
//dma_addr_t sgs_dma, dma_addr, next_sgs_dma;
dma_addr_t dma_addr, sgs_dma;
struct sdi_sgl_info *sg_list;
const int last_sg = PAGE_SIZE / sizeof(struct sdi_sgl_info) - 1;
if (!dma_info || !sg || !nents || !len) {
epfront_err("Input parameter is invalid.");
return -EINVAL;
}
sg_list = dma_info->sg_list;
sgs_dma = dma_info->first_dma_addr;
dma_addr = sg_dma_address(sg);
dma_len = sg_dma_len(sg);
length = (int)len;
i = 0;
for (;;) {
if (i > last_sg) {
struct sdi_sgl_info *old_sgl_list = sg_list;
sg_list = (struct sdi_sgl_info *)((char *)sg_list + PAGE_SIZE);
sgs_dma += PAGE_SIZE;
sg_list[0].addr = old_sgl_list[i - 1].addr;
sg_list[0].id = old_sgl_list[i - 1].id;
sg_list[0].len = old_sgl_list[i - 1].len;
old_sgl_list[i - 1].addr = cpu_to_le64(sgs_dma);
old_sgl_list[i - 1].len = PAGE_SIZE;
old_sgl_list[i - 1].id = SGL_SEGMENT_ID;
i = 1;
}
sg_list[i].addr = cpu_to_le64(dma_addr);
sg_list[i].len = cpu_to_le32(dma_len);
if ((length -= (int)dma_len) > 0) {
sg_list[i].id = SGL_DATA_BLOCK_ID;
} else if (!length) {
sg_list[i].id = SGL_LAST_SEGMENT_ID;
break;
} else {
epfront_err("Parameter len is not equal iod's sgs total len.");
status = -EINVAL;
goto reset_dma;
}
sg = sg_next(sg);
if (unlikely(!sg)) {
epfront_err("Next SG is NULL.");
status = -EINVAL;
goto reset_dma;
}
dma_addr = sg_dma_address(sg);
dma_len = sg_dma_len(sg);
i++;
}
return 0;
reset_dma:
memset(dma_info->sg_list, 0, dma_info->length);
return status;
}
/*****************************************************************************
Function : sq_alloc
Description : alloc sq
Input : const ulp_sq_base_t * sq_base
u16 qid
void * addr
dma_addr_t dma_addr
Output : sdi_sq_info_t *
Return : sdi_sq_info_t *
*****************************************************************************/
static sdi_sq_info_t *sq_alloc(const ulp_sq_base_t *sq_base, u16 qid,void *addr , dma_addr_t dma_addr, sdi_pdev_info_t *sdev){
sdi_pdev_info_t *spdev = sdev;
sdi_sq_info_t *sq_info;
u32 size;
BUG_ON(!spdev);
BUG_ON(!addr);
sq_info = (sdi_sq_info_t *)kzalloc(sizeof(sdi_sq_info_t), GFP_KERNEL);
if (!sq_info) {
epfront_err("Allocate memory failed.");
return NULL;
}
size = sq_base->q_depth * sq_base->stride;
sq_info->sq_addr = addr;
sq_info->dma_addr = dma_addr;
sq_info->q_db = &spdev->dbs[(long)qid * 2 * spdev->db_stride];
sq_info->sqid = qid;
sq_info->spdev = spdev;
sq_info->size = size;
sq_info->stride = sq_base->stride;
sq_info->q_depth = sq_base->q_depth;
sq_info->q_type = sq_base->q_type;
sq_info->cq_id = qid;
sq_info->spdev = spdev;
sq_info->q_prio = sq_base->qprio;
spin_lock_init(&(sq_info->sq_lock));
return sq_info;
}
/*****************************************************************************
Function : send_create_sq_cmd
Description : create sq command
Input : const sdi_sq_info_t * sq_info
Output : int
Return : int
*****************************************************************************/
static int send_create_sq_cmd(const sdi_sq_info_t *sq_info, sdi_pdev_info_t *sdev)
{
sdi_pdev_info_t *spdev = sdev;
struct sdi_admin_command c;
int status;
BUG_ON(!spdev);
memset((void *)&c, 0, sizeof(c));
c.create_sq.opcode = sdi_admin_create_sq;
c.create_sq.prp1 = cpu_to_le64(sq_info->dma_addr);
c.create_sq.sqid = cpu_to_le16(sq_info->sqid);
c.create_sq.qsize = cpu_to_le16(sq_info->q_depth - 1);
c.create_sq.cqid = cpu_to_le16(sq_info->sqid);
c.create_sq.sq_flags = cpu_to_le16(SDI_QUEUE_PHYS_CONTIG | sq_info->q_prio);
c.create_sq.size = cpu_to_le32(sq_info->size);
c.create_sq.sq_type = cpu_to_le16(sq_info->q_type);
c.create_sq.stride = cpu_to_le16(sq_info->stride);
epfront_dbg("SDI_DBG_LOG: create SQ opcode: %d, sqid: %d, qsize: %d, cqid: %d, sq_flags: %d",
c.create_sq.opcode, c.create_sq.sqid , c.create_sq.qsize,
c.create_sq.cqid, c.create_sq.sq_flags);
status = sdi_submit_admin_cmd(spdev, &c, NULL, ADMIN_TIMEOUT);
if (status)
epfront_err("Create SQ[%d] failed status: %d", sq_info->sqid, status);
return status;
}
/*****************************************************************************
Function : process_io_cq
Description : process io cq list
Input : sdi_cq_info_t * cq
Output : int
Return : int
*****************************************************************************/
static int process_io_cq(sdi_cq_info_t *cq)
{
u16 head;
u8 phase;
cqe_head_t *cqe;
cqe_status_t head_info;
sdi_sq_info_t *sq_info;
sdi_pdev_info_t *spdev;
spdev = cq->spdev;
head = cq->head;
phase = cq->cq_phase;
for (; ;) {
cqe = (cqe_head_t *)((unsigned char*)cq->cq_addr + (long)head * cq->stride);
if(phase != cqe->phase)
break;
head_info.cqid = cq->cqid;
if (++head == cq->q_depth) {
head = 0;
phase = !phase;
}
if (likely(cq->cqe_handler))
cq->cqe_handler(cq->prv_data, cqe, cq->stride, &head_info);
cq->rx_ok_cnt++;
sq_info = spdev->sq_info[head_info.cqid];
if (unlikely(!sq_info)) {
epfront_warn("%s SQ[%d] not exist.", spdev->name, head_info.cqid); ////head_info.sqid
continue;
}
QUEUE_INC_ONE(sq_info->head, sq_info->q_depth);
}
if (head == cq->head && cq->cq_phase == phase)
return 0;
writel(head, cq->q_db);
cq->head = head;
cq->cq_phase = phase;
cq->cqe_seen = 1;
return 1;
}
/*****************************************************************************
Function : sdi_irq_check
Description : check sdi irq
Input : int irq
void * data
Output : irqreturn_t
Return : irqreturn_t
*****************************************************************************/
static irqreturn_t sdi_irq_check(int irq, void *data)
{
sdi_cq_info_t *cq = (sdi_cq_info_t *) data;
cqe_head_t *cqe;
UNREFERENCE_PARAM(irq);
cqe = (cqe_head_t *)((unsigned char* )cq->cq_addr + (long)cq->head * cq->stride);
if (cqe->phase != cq->cq_phase)
return IRQ_NONE;
return IRQ_WAKE_THREAD;
}
/*****************************************************************************
Function : sdi_io_irq
Description : callback function for irq request
Input : int irq
void * data
Output : irqreturn_t
Return : irqreturn_t
*****************************************************************************/
static irqreturn_t sdi_io_irq(int irq, void *data)
{
irqreturn_t result;
sdi_cq_info_t *cq = (sdi_cq_info_t *) data;
UNREFERENCE_PARAM(irq);
spin_lock(&cq->cq_lock);
(void)process_io_cq(cq);
spin_unlock(&cq->cq_lock);
result = cq->cqe_seen ? IRQ_HANDLED : IRQ_NONE;
cq->cqe_seen = 0;
return result;
}
/*****************************************************************************
Function : sdi_pf12_cq_request_irq
Description : cq request thread irq
Input : sdi_cq_info_t * cq_info
Output : int
Return : int
*****************************************************************************/
static int sdi_pf12_cq_request_irq(sdi_cq_info_t *cq_info)
{
sdi_pdev_info_t *spdev;
spdev = cq_info->spdev;
if (spdev->use_threaded_interrupts)
return request_threaded_irq(cq_info->cq_vector, sdi_irq_check, sdi_io_irq,
(unsigned long)IRQF_SHARED, cq_info->irqname, (void *)cq_info);
return request_irq(cq_info->cq_vector, sdi_io_irq, (unsigned long)IRQF_SHARED,
cq_info->irqname, (void*)cq_info);
}
/*****************************************************************************
Function : cq_alloc
Description : alloc cq
Input : const ulp_cq_base_t * cq_base
int qid
void * addr
dma_addr_t dma_addr
Output : sdi_cq_info_t *
Return : sdi_cq_info_t *
*****************************************************************************/
static sdi_cq_info_t *cq_alloc(const ulp_cq_base_t *cq_base, int qid,void *addr, dma_addr_t dma_addr, sdi_pdev_info_t *sdev){
int size;
sdi_pdev_info_t *spdev = sdev;
sdi_cq_info_t *cq_info = NULL;
BUG_ON(!spdev);
BUG_ON(!addr);
cq_info = (sdi_cq_info_t *)kzalloc(sizeof(sdi_cq_info_t), GFP_KERNEL);
if (!cq_info) {
epfront_err("Allocate memory failed.");
return NULL;
}
size = cq_base->stride * cq_base->q_depth;
cq_info->cq_addr = addr;
cq_info->dma_addr = dma_addr;
memset((void *)cq_info->cq_addr, 0, size);
cq_info->q_db = &spdev->dbs[(long)qid * 2 * spdev->db_stride] + (long)spdev->db_stride;
cq_info->cq_vector = spdev->entry[qid].vector;
cq_info->cqid = qid;
cq_info->spdev = spdev;
cq_info->size = size;
cq_info->vecid = qid;
cq_info->stride = cq_base->stride;
cq_info->q_type = cq_base->q_type;
cq_info->q_depth = cq_base->q_depth;
cq_info->prv_data = cq_base->prv_data;
cq_info->cq_phase = 1;
cq_info->cqe_handler = cq_base->cqe_handler;
cq_info->cpu_no = cq_base->cpu_no;
cq_info->prv_data = cq_base->prv_data;
spin_lock_init(&(cq_info->cq_lock));
(void)snprintf(cq_info->irqname, sizeof(cq_info->irqname), "cqid:%02d", qid);
return cq_info;
}
/*****************************************************************************
Function : send_create_cq_cmd
Description : create cq command
Input : sdi_cq_info_t * cq_info
Output : int
Return : int
*****************************************************************************/
static int send_create_cq_cmd(sdi_cq_info_t *cq_info, sdi_pdev_info_t *sdev)
{
struct sdi_admin_command c;
sdi_pdev_info_t *spdev = sdev;
int status;
BUG_ON(!spdev);
memset((void *)&c, 0, sizeof(c));
c.create_cq.opcode = sdi_admin_create_cq;
c.create_cq.prp1 = cpu_to_le64(cq_info->dma_addr);
c.create_cq.cqid = cpu_to_le16(cq_info->cqid);
c.create_cq.qsize = cpu_to_le16(cq_info->q_depth- 1);
c.create_cq.irq_vector = cpu_to_le16(cq_info->vecid);
c.create_cq.cq_flags = cpu_to_le16(SDI_QUEUE_PHYS_CONTIG |SDI_CQ_IRQ_ENABLED);
c.create_cq.size = cpu_to_le32(cq_info->size);
c.create_cq.cq_type = cpu_to_le16(cq_info->q_type);
c.create_cq.stride = cpu_to_le16(cq_info->stride);
epfront_dbg("SDI_DBG_LOG: create CQ opcode: %d, cqid: %d, qsize: %d, cq_flags: %d, irq_vector: %d",
c.create_cq.opcode, c.create_cq.cqid , c.create_cq.qsize,
c.create_cq.cq_flags, c.create_cq.irq_vector);
status = sdi_submit_admin_cmd(spdev, &c, NULL, ADMIN_TIMEOUT);
if (status)
epfront_err("create CQ[%d] failed status: %x", cq_info->cqid ,status);
return status;
}
/*****************************************************************************
Function : send_delete_sq_cmd
Description : delete sq command
Input : u16 qid
Output : void
Return : void
*****************************************************************************/
static void send_delete_sq_cmd(u16 qid, struct sdi_pdev_info *sdev){
struct sdi_admin_command c;
sdi_pdev_info_t *spdev = sdev;
BUG_ON(!spdev);
memset((void*)&c,0,sizeof(c));
c.delete_queue.opcode = sdi_admin_delete_sq;
c.delete_queue.qid = cpu_to_le16(qid);
(void)sdi_submit_admin_cmd(spdev, &c, NULL, ADMIN_TIMEOUT);
}
/*****************************************************************************
Function : send_delete_cq_cmd
Description : delete cq command
Input : u16 qid
Output : void
Return : void
*****************************************************************************/
static void send_delete_cq_cmd(u16 qid, struct sdi_pdev_info *sdev){
struct sdi_admin_command c;
sdi_pdev_info_t *spdev = sdev;
BUG_ON(!spdev);
memset((void*)&c, 0, sizeof(c));
c.delete_queue.opcode = sdi_admin_delete_cq;
c.delete_queue.qid = cpu_to_le16(qid);
(void)sdi_submit_admin_cmd(spdev, &c, NULL, ADMIN_TIMEOUT);
}
/*****************************************************************************
Function : ep_create_queue
Description : create queue
Input : ulp_cq_base_t * cq_base
ulp_sq_base_t * sq_base
Output : s16
Return : s16
*****************************************************************************/
s16 ep_create_queue(ulp_cq_base_t *cq_base,ulp_sq_base_t *sq_base, struct sdi_pdev_info *sdev){
sdi_pdev_info_t *spdev = sdev;
u16 depth, qid;
int status = -1;
int cq_size = 0, sq_size = 0, offset = 0;
void *addr = NULL;
dma_addr_t dma_addr;
depth = spdev->max_io_cq_nr + 1;
spin_lock(&spdev->qid_lock);
do {
qid = (u16)find_first_zero_bit((unsigned long *)spdev->qids, (unsigned long)depth);
if (qid >= depth) {
spin_unlock(&spdev->qid_lock);
epfront_err("%s no more CQ resource.", spdev->name);
return -ENOMEM;
}
} while (test_and_set_bit(qid, spdev->qids));
spin_unlock(&spdev->qid_lock);
epfront_info("qids %lx ",spdev->qids[0]);
cq_size = cq_base->stride * cq_base->q_depth;
sq_size = sq_base->stride * sq_base->q_depth;
offset = (int)(((cq_size + PAGE_SIZE - 1 ) >> PAGE_SHIFT) << PAGE_SHIFT);
addr = (u8 *)dma_alloc_coherent(&spdev->pdev->dev,
(unsigned int)(cq_size + sq_size + (u32)PAGE_SIZE), &dma_addr, GFP_KERNEL);
if (!addr) {
epfront_err("alloc mem failed");
status = -ENOMEM;
goto free_qid;
}
spdev->cq_info[qid] = cq_alloc(cq_base, qid, addr, dma_addr, spdev);
if (!spdev->cq_info[qid]) {
epfront_err("alloc cq failed");
status = -ENOMEM;
goto free_queue;
}
sq_base->cq_id = qid;
spdev->sq_info[qid] = sq_alloc(sq_base, qid,
(unsigned char*)addr + offset, dma_addr + offset, spdev);
if (!spdev->sq_info[qid]) {
epfront_err("alloc cq failed");
status = -ENOMEM;
goto free_cq_info;
}
epfront_info("alloc queue %d success", qid);
status= send_create_cq_cmd(spdev->cq_info[qid], spdev);
if (status) {
epfront_err("send cq cmd failed");
status = -ENODEV;
goto free_sq_info;
}
status= send_create_sq_cmd(spdev->sq_info[qid], spdev);
if (status) {
epfront_err("send sq cmd failed");
status = -ENODEV;
goto free_cq;
}
if (cq_base->cpu_no >= 0){
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 32) || defined(RHEL_RELEASE))
(void)irq_set_affinity_hint(spdev->cq_info[qid]->cq_vector, get_cpu_mask((u32)cq_base->cpu_no));
#endif
}
status = sdi_pf12_cq_request_irq(spdev->cq_info[qid]);
if (status) {
epfront_err("%s CQ[%d] request IRQ [%d] failed.", spdev->name, qid, spdev->cq_info[qid]->cq_vector);
status = -ENOMEM;
goto free_sq;
}
status = sdi_create_cq_sysfs(spdev->cq_info[qid], &spdev->kobj);
if (status) {
epfront_err("sdi_create_cq_sysfs failed, qid[%d] ret[%d]", qid, status);
goto free_cq_irq;
}
status = sdi_create_sq_sysfs(spdev->sq_info[qid], &spdev->kobj);
if (status) {
epfront_err("sdi_create_sq_sysfs failed, qid[%d] ret[%d]", qid, status);
goto destroy_cq_sys;
}
return (signed short)qid;
destroy_cq_sys:
sdi_destroy_cq_sysfs(spdev->cq_info[qid]);
free_cq_irq:
free_irq(spdev->cq_info[qid]->cq_vector, spdev->cq_info[qid]);
free_sq:
send_delete_sq_cmd(qid, spdev);
free_cq:
send_delete_cq_cmd(qid, spdev);
free_sq_info:
kfree(spdev->sq_info[qid]);
spdev->sq_info[qid] = NULL;
free_cq_info:
kfree(spdev->cq_info[qid]);
spdev->cq_info[qid] = NULL;
free_queue:
dma_free_coherent(&spdev->pdev->dev, (unsigned int)(cq_size + sq_size + (u32)PAGE_SIZE), addr, dma_addr);
free_qid:
spin_lock(&spdev->qid_lock);
clear_bit(qid, spdev->qids);
spin_unlock(&spdev->qid_lock);
return status;
}
/*****************************************************************************
Function : __ep_delete_cq
Description : delete cq
Input : u16 qid
Output : void
Return : void
*****************************************************************************/
static void __ep_delete_cq(u16 qid, struct sdi_pdev_info *sdev){
sdi_pdev_info_t *spdev = sdev;
sdi_cq_info_t *cq_info = NULL;
if (!spdev || QID_CHECK(qid)) {
epfront_err("Input parameter is invalid.");
return;
}
cq_info = spdev->cq_info[qid];
if (!cq_info) {
epfront_err("cq is not exist,return");
return;
}
#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 32) || defined(RHEL_RELEASE))
(void)irq_set_affinity_hint(cq_info->cq_vector, NULL);
#endif
free_irq(cq_info->cq_vector, cq_info);
kfree(cq_info);
spdev->cq_info[qid]= NULL;
}
/*****************************************************************************
Function : __ep_delete_sq
Description : delete sq
Input : u16 qid
Output : void
Return : void
*****************************************************************************/
static void __ep_delete_sq(u16 qid, struct sdi_pdev_info *sdev)
{
sdi_sq_info_t *sq_info = NULL;
sdi_pdev_info_t *spdev = sdev;
if (!spdev || QID_CHECK(qid)) {
epfront_err("Input parameter is invalid.");
return ;
}
sq_info = spdev->sq_info[qid];
if (!sq_info) {
epfront_err("sq is not exist,return");
return;
}
kfree(sq_info);
spdev->sq_info[qid]= NULL;
}
/*****************************************************************************
Function : is_send_cmd
Description : check device sendcmd status
Input : void
Output : int
Return : int
*****************************************************************************/
static int is_send_cmd(struct sdi_pdev_info *sdev)
{
u32 val = 0;
sdi_pdev_info_t *spdev = sdev;
if (!spdev || !spdev->pdev)
{
epfront_info("sdev or pdev is invalib");
return 0;
}
(void)pci_read_config_dword(spdev->pdev, 0, &val);
// check link state
if ((val & LINK_CHECK_STATE) == LINK_CHECK_STATE) {
epfront_info("link state is 0xffff");
return 0;
}
// check bar state;check update state,if update,admin queue may be not exist.
if (!(spdev->bar) || test_bit(SDI_FRONT_UPDATE, &spdev->demand_status)) {
epfront_info("sdev->bar NULL, demand 0x%lx", spdev->demand_status);
return 0;
}
val = readl(&spdev->bar->csts) & LINK_CHECK_STATE;
// check csts reg is 0xffffffff?
if (val == LINK_CHECK_STATE) {
epfront_info("csts reg is 0xffffffff.");
return 0;
}
/*
* check csts 8bit : check sdi.ko exist
* check csts 0bit:check csts.ready,if not ready,admin queue may be not exist.
*/
if (((val & 0x1) == 0x1) && (((val >> 8) & 0x1) == 0x1))
return 1;
epfront_info("csts 0x%x", val);
return 0;
}
/*****************************************************************************
Function : ep_delete_queue
Description : delete queue
Input : u16 qid
Output : void
Return : void
*****************************************************************************/
void ep_delete_queue(u16 qid, struct sdi_pdev_info *sdev)
{
sdi_pdev_info_t *spdev = sdev;
sdi_cq_info_t *cq_info = NULL;
sdi_sq_info_t *sq_info = NULL;
BUG_ON(!spdev);
if (!spdev || QID_CHECK(qid)) {
epfront_err("invalid qid %d",qid);
return;
}
spin_lock(&spdev->qid_lock);
if (!test_bit(qid, spdev->qids)) {
epfront_err("qid %d has already delete",qid);
spin_unlock(&spdev->qid_lock);
return;
}
spin_unlock(&spdev->qid_lock);
cq_info = spdev->cq_info[qid];
sq_info = spdev->sq_info[qid];
if (sq_info)
sdi_destroy_sq_sysfs(sq_info);
if (cq_info)
sdi_destroy_cq_sysfs(cq_info);
if (is_send_cmd(spdev)) {
send_delete_sq_cmd(qid, spdev);
send_delete_cq_cmd(qid, spdev);
}
if (cq_info && sq_info)
dma_free_coherent(&sq_info->spdev->pdev->dev,
(unsigned int)(sq_info->size + cq_info->size + (u32)PAGE_SIZE),
(void*)cq_info->cq_addr, cq_info->dma_addr);
else
epfront_err("can't happen: qid %d sq_info[0x%p] cq_info[0x%p]", qid, sq_info, cq_info);
__ep_delete_sq(qid, spdev);
__ep_delete_cq(qid, spdev);
spin_lock(&spdev->qid_lock);
clear_bit(qid, spdev->qids);
spin_unlock(&spdev->qid_lock);
epfront_info("delete queue %d success", qid);
}
/*****************************************************************************
Function : ep_send_cmd
Description : submit admin command
Input : void * cmd_data
u32 len
int * result
unsigned timeout
Output : int
Return : int
*****************************************************************************/
int ep_send_cmd(void *cmd_data, u32 len,int *result, unsigned timeout, struct sdi_pdev_info *sdev)
{
sdi_pdev_info_t *spdev = sdev;
int status;
struct sdi_admin_command c;
if (!spdev || !cmd_data || !len || !timeout) {
epfront_err("Input parameter is invalid.");
return -EINVAL;
}
memset((void *)&c, 0, sizeof(struct sdi_admin_command));
c.ucmd.opcode = sdi_admin_udrv_send_cmd;