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#include <linux/aer.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include "nitrox_dev.h"
#include "nitrox_common.h"
#include "nitrox_csr.h"
#define CNN55XX_DEV_ID 0x12
#define MAX_PF_QUEUES 64
#define UCODE_HLEN 48
#define SE_GROUP 0
#define DRIVER_VERSION "1.0"
/* SE microcode */
#define SE_FW "cnn55xx_se.fw"
static const char nitrox_driver_name[] = "CNN55XX";
static LIST_HEAD(ndevlist);
static DEFINE_MUTEX(devlist_lock);
static unsigned int num_devices;
/**
* nitrox_pci_tbl - PCI Device ID Table
*/
static const struct pci_device_id nitrox_pci_tbl[] = {
{PCI_VDEVICE(CAVIUM, CNN55XX_DEV_ID), 0},
/* required last entry */
{0, }
};
MODULE_DEVICE_TABLE(pci, nitrox_pci_tbl);
static unsigned int qlen = DEFAULT_CMD_QLEN;
module_param(qlen, uint, 0644);
MODULE_PARM_DESC(qlen, "Command queue length - default 2048");
/**
* struct ucode - Firmware Header
* @id: microcode ID
* @version: firmware version
* @code_size: code section size
* @raz: alignment
* @code: code section
*/
struct ucode {
u8 id;
char version[VERSION_LEN - 1];
__be32 code_size;
u8 raz[12];
u64 code[0];
};
/**
* write_to_ucd_unit - Write Firmware to NITROX UCD unit
*/
static void write_to_ucd_unit(struct nitrox_device *ndev,
struct ucode *ucode)
{
u32 code_size = be32_to_cpu(ucode->code_size) * 2;
u64 offset, data;
int i = 0;
/*
* UCD structure
*
* -------------
* | BLK 7 |
* -------------
* | BLK 6 |
* -------------
* | ... |
* -------------
* | BLK 0 |
* -------------
* Total of 8 blocks, each size 32KB
*/
/* set the block number */
offset = UCD_UCODE_LOAD_BLOCK_NUM;
nitrox_write_csr(ndev, offset, 0);
code_size = roundup(code_size, 8);
while (code_size) {
data = ucode->code[i];
/* write 8 bytes at a time */
offset = UCD_UCODE_LOAD_IDX_DATAX(i);
nitrox_write_csr(ndev, offset, data);
code_size -= 8;
i++;
}
/* put all SE cores in group 0 */
offset = POM_GRP_EXECMASKX(SE_GROUP);
nitrox_write_csr(ndev, offset, (~0ULL));
for (i = 0; i < ndev->hw.se_cores; i++) {
/*
* write block number and firware length
* bit:<2:0> block number
* bit:3 is set SE uses 32KB microcode
* bit:3 is clear SE uses 64KB microcode
*/
offset = UCD_SE_EID_UCODE_BLOCK_NUMX(i);
nitrox_write_csr(ndev, offset, 0x8);
}
usleep_range(300, 400);
}
static int nitrox_load_fw(struct nitrox_device *ndev, const char *fw_name)
{
const struct firmware *fw;
struct ucode *ucode;
int ret;
dev_info(DEV(ndev), "Loading firmware \"%s\"\n", fw_name);
ret = request_firmware(&fw, fw_name, DEV(ndev));
if (ret < 0) {
dev_err(DEV(ndev), "failed to get firmware %s\n", fw_name);
return ret;
}
ucode = (struct ucode *)fw->data;
/* copy the firmware version */
memcpy(ndev->hw.fw_name, ucode->version, (VERSION_LEN - 2));
ndev->hw.fw_name[VERSION_LEN - 1] = '\0';
write_to_ucd_unit(ndev, ucode);
release_firmware(fw);
set_bit(NITROX_UCODE_LOADED, &ndev->status);
/* barrier to sync with other cpus */
smp_mb__after_atomic();
return 0;
}
/**
* nitrox_add_to_devlist - add NITROX device to global device list
* @ndev: NITROX device
*/
static int nitrox_add_to_devlist(struct nitrox_device *ndev)
{
struct nitrox_device *dev;
int ret = 0;
INIT_LIST_HEAD(&ndev->list);
refcount_set(&ndev->refcnt, 1);
mutex_lock(&devlist_lock);
list_for_each_entry(dev, &ndevlist, list) {
if (dev == ndev) {
ret = -EEXIST;
goto unlock;
}
}
ndev->idx = num_devices++;
list_add_tail(&ndev->list, &ndevlist);
unlock:
mutex_unlock(&devlist_lock);
return ret;
}
/**
* nitrox_remove_from_devlist - remove NITROX device from
* global device list
* @ndev: NITROX device
*/
static void nitrox_remove_from_devlist(struct nitrox_device *ndev)
{
mutex_lock(&devlist_lock);
list_del(&ndev->list);
num_devices--;
mutex_unlock(&devlist_lock);
}
static int nitrox_reset_device(struct pci_dev *pdev)
{
int pos = 0;
pos = pci_save_state(pdev);
if (pos) {
dev_err(&pdev->dev, "Failed to save pci state\n");
return -ENOMEM;
}
pos = pci_pcie_cap(pdev);
if (!pos)
return -ENOTTY;
if (!pci_wait_for_pending_transaction(pdev))
dev_err(&pdev->dev, "waiting for pending transaction\n");
pcie_capability_set_word(pdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
msleep(100);
pci_restore_state(pdev);
return 0;
}
static int nitrox_pf_sw_init(struct nitrox_device *ndev)
{
int err;
err = nitrox_common_sw_init(ndev);
if (err)
return err;
err = nitrox_pf_init_isr(ndev);
if (err)
nitrox_common_sw_cleanup(ndev);
return err;
}
static void nitrox_pf_sw_cleanup(struct nitrox_device *ndev)
{
nitrox_pf_cleanup_isr(ndev);
nitrox_common_sw_cleanup(ndev);
}
/**
* nitrox_bist_check - Check NITORX BIST registers status
* @ndev: NITROX device
*/
static int nitrox_bist_check(struct nitrox_device *ndev)
{
u64 value = 0;
int i;
for (i = 0; i < NR_CLUSTERS; i++) {
value += nitrox_read_csr(ndev, EMU_BIST_STATUSX(i));
value += nitrox_read_csr(ndev, EFL_CORE_BIST_REGX(i));
}
value += nitrox_read_csr(ndev, UCD_BIST_STATUS);
value += nitrox_read_csr(ndev, NPS_CORE_BIST_REG);
value += nitrox_read_csr(ndev, NPS_CORE_NPC_BIST_REG);
value += nitrox_read_csr(ndev, NPS_PKT_SLC_BIST_REG);
value += nitrox_read_csr(ndev, NPS_PKT_IN_BIST_REG);
value += nitrox_read_csr(ndev, POM_BIST_REG);
value += nitrox_read_csr(ndev, BMI_BIST_REG);
value += nitrox_read_csr(ndev, EFL_TOP_BIST_STAT);
value += nitrox_read_csr(ndev, BMO_BIST_REG);
value += nitrox_read_csr(ndev, LBC_BIST_STATUS);
value += nitrox_read_csr(ndev, PEM_BIST_STATUSX(0));
if (value)
return -EIO;
return 0;
}
static void nitrox_get_hwinfo(struct nitrox_device *ndev)
{
union emu_fuse_map emu_fuse;
u64 offset;
int i;
for (i = 0; i < NR_CLUSTERS; i++) {
u8 dead_cores;
offset = EMU_FUSE_MAPX(i);
emu_fuse.value = nitrox_read_csr(ndev, offset);
if (emu_fuse.s.valid) {
dead_cores = hweight32(emu_fuse.s.ae_fuse);
ndev->hw.ae_cores += AE_CORES_PER_CLUSTER - dead_cores;
dead_cores = hweight16(emu_fuse.s.se_fuse);
ndev->hw.se_cores += SE_CORES_PER_CLUSTER - dead_cores;
}
}
}
static int nitrox_pf_hw_init(struct nitrox_device *ndev)
{
int err;
err = nitrox_bist_check(ndev);
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