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net: txgbe: Add operations to interact with firmware 

Add firmware interaction to get EEPROM information.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiawen Wu 2022-10-31 15:07:56 +08:00 committed by David S. Miller
parent 1efa9bfe58
commit 049fe53653
5 changed files with 316 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/wangxun/txgbe/txgbe.h
View File

@ -35,6 +35,7 @@ struct txgbe_adapter {
struct txgbe_hw hw;
u16 msg_enable;
struct txgbe_mac_addr *mac_table;
char eeprom_id[32];
};
extern char txgbe_driver_name[];

219
drivers/net/ethernet/wangxun/txgbe/txgbe_hw.c
View File

@ -44,6 +44,218 @@ static void txgbe_init_thermal_sensor_thresh(struct txgbe_hw *hw)
wr32(wxhw, WX_TS_DALARM_THRE, 614);
}
/**
* txgbe_read_pba_string - Reads part number string from EEPROM
* @hw: pointer to hardware structure
* @pba_num: stores the part number string from the EEPROM
* @pba_num_size: part number string buffer length
*
* Reads the part number string from the EEPROM.
**/
int txgbe_read_pba_string(struct txgbe_hw *hw, u8 *pba_num, u32 pba_num_size)
{
u16 pba_ptr, offset, length, data;
struct wx_hw *wxhw = &hw->wxhw;
int ret_val;
if (!pba_num) {
wx_err(wxhw, "PBA string buffer was null\n");
return -EINVAL;
}
ret_val = wx_read_ee_hostif(wxhw,
wxhw->eeprom.sw_region_offset + TXGBE_PBANUM0_PTR,
&data);
if (ret_val != 0) {
wx_err(wxhw, "NVM Read Error\n");
return ret_val;
}
ret_val = wx_read_ee_hostif(wxhw,
wxhw->eeprom.sw_region_offset + TXGBE_PBANUM1_PTR,
&pba_ptr);
if (ret_val != 0) {
wx_err(wxhw, "NVM Read Error\n");
return ret_val;
}
/* if data is not ptr guard the PBA must be in legacy format which
* means pba_ptr is actually our second data word for the PBA number
* and we can decode it into an ascii string
*/
if (data != TXGBE_PBANUM_PTR_GUARD) {
wx_err(wxhw, "NVM PBA number is not stored as string\n");
/* we will need 11 characters to store the PBA */
if (pba_num_size < 11) {
wx_err(wxhw, "PBA string buffer too small\n");
return -ENOMEM;
}
/* extract hex string from data and pba_ptr */
pba_num[0] = (data >> 12) & 0xF;
pba_num[1] = (data >> 8) & 0xF;
pba_num[2] = (data >> 4) & 0xF;
pba_num[3] = data & 0xF;
pba_num[4] = (pba_ptr >> 12) & 0xF;
pba_num[5] = (pba_ptr >> 8) & 0xF;
pba_num[6] = '-';
pba_num[7] = 0;
pba_num[8] = (pba_ptr >> 4) & 0xF;
pba_num[9] = pba_ptr & 0xF;
/* put a null character on the end of our string */
pba_num[10] = '\0';
/* switch all the data but the '-' to hex char */
for (offset = 0; offset < 10; offset++) {
if (pba_num[offset] < 0xA)
pba_num[offset] += '0';
else if (pba_num[offset] < 0x10)
pba_num[offset] += 'A' - 0xA;
}
return 0;
}
ret_val = wx_read_ee_hostif(wxhw, pba_ptr, &length);
if (ret_val != 0) {
wx_err(wxhw, "NVM Read Error\n");
return ret_val;
}
if (length == 0xFFFF || length == 0) {
wx_err(wxhw, "NVM PBA number section invalid length\n");
return -EINVAL;
}
/* check if pba_num buffer is big enough */
if (pba_num_size < (((u32)length * 2) - 1)) {
wx_err(wxhw, "PBA string buffer too small\n");
return -ENOMEM;
}
/* trim pba length from start of string */
pba_ptr++;
length--;
for (offset = 0; offset < length; offset++) {
ret_val = wx_read_ee_hostif(wxhw, pba_ptr + offset, &data);
if (ret_val != 0) {
wx_err(wxhw, "NVM Read Error\n");
return ret_val;
}
pba_num[offset * 2] = (u8)(data >> 8);
pba_num[(offset * 2) + 1] = (u8)(data & 0xFF);
}
pba_num[offset * 2] = '\0';
return 0;
}
/**
* txgbe_calc_eeprom_checksum - Calculates and returns the checksum
* @hw: pointer to hardware structure
* @checksum: pointer to cheksum
*
* Returns a negative error code on error
**/
static int txgbe_calc_eeprom_checksum(struct txgbe_hw *hw, u16 *checksum)
{
struct wx_hw *wxhw = &hw->wxhw;
u16 *eeprom_ptrs = NULL;
u32 buffer_size = 0;
u16 *buffer = NULL;
u16 *local_buffer;
int status;
u16 i;
wx_init_eeprom_params(wxhw);
if (!buffer) {
eeprom_ptrs = kvmalloc_array(TXGBE_EEPROM_LAST_WORD, sizeof(u16),
GFP_KERNEL);
if (!eeprom_ptrs)
return -ENOMEM;
/* Read pointer area */
status = wx_read_ee_hostif_buffer(wxhw, 0,
TXGBE_EEPROM_LAST_WORD,
eeprom_ptrs);
if (status != 0) {
wx_err(wxhw, "Failed to read EEPROM image\n");
return status;
}
local_buffer = eeprom_ptrs;
} else {
if (buffer_size < TXGBE_EEPROM_LAST_WORD)
return -EFAULT;
local_buffer = buffer;
}
for (i = 0; i < TXGBE_EEPROM_LAST_WORD; i++)
if (i != wxhw->eeprom.sw_region_offset + TXGBE_EEPROM_CHECKSUM)
*checksum += local_buffer[i];
*checksum = TXGBE_EEPROM_SUM - *checksum;
if (*checksum < 0)
return -EINVAL;
if (eeprom_ptrs)
kvfree(eeprom_ptrs);
return 0;
}
/**
* txgbe_validate_eeprom_checksum - Validate EEPROM checksum
* @hw: pointer to hardware structure
* @checksum_val: calculated checksum
*
* Performs checksum calculation and validates the EEPROM checksum. If the
* caller does not need checksum_val, the value can be NULL.
**/
int txgbe_validate_eeprom_checksum(struct txgbe_hw *hw, u16 *checksum_val)
{
struct wx_hw *wxhw = &hw->wxhw;
u16 read_checksum = 0;
u16 checksum;
int status;
/* Read the first word from the EEPROM. If this times out or fails, do
* not continue or we could be in for a very long wait while every
* EEPROM read fails
*/
status = wx_read_ee_hostif(wxhw, 0, &checksum);
if (status) {
wx_err(wxhw, "EEPROM read failed\n");
return status;
}
checksum = 0;
status = txgbe_calc_eeprom_checksum(hw, &checksum);
if (status != 0)
return status;
status = wx_read_ee_hostif(wxhw, wxhw->eeprom.sw_region_offset +
TXGBE_EEPROM_CHECKSUM, &read_checksum);
if (status != 0)
return status;
/* Verify read checksum from EEPROM is the same as
* calculated checksum
*/
if (read_checksum != checksum) {
status = -EIO;
wx_err(wxhw, "Invalid EEPROM checksum\n");
}
/* If the user cares, return the calculated checksum */
if (checksum_val)
*checksum_val = checksum;
return status;
}
static void txgbe_reset_misc(struct txgbe_hw *hw)
{
struct wx_hw *wxhw = &hw->wxhw;
@ -63,7 +275,6 @@ static void txgbe_reset_misc(struct txgbe_hw *hw)
int txgbe_reset_hw(struct txgbe_hw *hw)
{
struct wx_hw *wxhw = &hw->wxhw;
u32 reset = 0;
int status;
/* Call adapter stop to disable tx/rx and clear interrupts */
@ -71,10 +282,10 @@ int txgbe_reset_hw(struct txgbe_hw *hw)
if (status != 0)
return status;
reset = WX_MIS_RST_LAN_RST(wxhw->bus.func);
wr32(wxhw, WX_MIS_RST, reset | rd32(wxhw, WX_MIS_RST));
if (!(((wxhw->subsystem_device_id & WX_NCSI_MASK) == WX_NCSI_SUP) ||
((wxhw->subsystem_device_id & WX_WOL_MASK) == WX_WOL_SUP)))
wx_reset_hostif(wxhw);
WX_WRITE_FLUSH(wxhw);
usleep_range(10, 100);
status = wx_check_flash_load(wxhw, TXGBE_SPI_ILDR_STATUS_LAN_SW_RST(wxhw->bus.func));

2
drivers/net/ethernet/wangxun/txgbe/txgbe_hw.h
View File

@ -4,6 +4,8 @@
#ifndef _TXGBE_HW_H_
#define _TXGBE_HW_H_
int txgbe_read_pba_string(struct txgbe_hw *hw, u8 *pba_num, u32 pba_num_size);
int txgbe_validate_eeprom_checksum(struct txgbe_hw *hw, u16 *checksum_val);
int txgbe_reset_hw(struct txgbe_hw *hw);
#endif /* _TXGBE_HW_H_ */

85
drivers/net/ethernet/wangxun/txgbe/txgbe_main.c
View File

@ -158,6 +158,14 @@ static int txgbe_del_mac_filter(struct txgbe_adapter *adapter, u8 *addr, u16 poo
return -ENOMEM;
}
static void txgbe_up_complete(struct txgbe_adapter *adapter)
{
struct txgbe_hw *hw = &adapter->hw;
struct wx_hw *wxhw = &hw->wxhw;
wx_control_hw(wxhw, true);
}
static void txgbe_reset(struct txgbe_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
@ -270,6 +278,10 @@ static int txgbe_sw_init(struct txgbe_adapter *adapter)
**/
static int txgbe_open(struct net_device *netdev)
{
struct txgbe_adapter *adapter = netdev_priv(netdev);
txgbe_up_complete(adapter);
return 0;
}
@ -301,6 +313,7 @@ static int txgbe_close(struct net_device *netdev)
struct txgbe_adapter *adapter = netdev_priv(netdev);
txgbe_down(adapter);
wx_control_hw(&adapter->hw.wxhw, false);
return 0;
}
@ -309,6 +322,8 @@ static void txgbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
{
struct txgbe_adapter *adapter = pci_get_drvdata(pdev);
struct net_device *netdev = adapter->netdev;
struct txgbe_hw *hw = &adapter->hw;
struct wx_hw *wxhw = &hw->wxhw;
netif_device_detach(netdev);
@ -317,6 +332,8 @@ static void txgbe_dev_shutdown(struct pci_dev *pdev, bool *enable_wake)
txgbe_close_suspend(adapter);
rtnl_unlock();
wx_control_hw(wxhw, false);
pci_disable_device(pdev);
}
@ -393,6 +410,12 @@ static int txgbe_probe(struct pci_dev *pdev,
struct net_device *netdev;
int err, expected_gts;
u16 eeprom_verh = 0, eeprom_verl = 0, offset = 0;
u16 eeprom_cfg_blkh = 0, eeprom_cfg_blkl = 0;
u16 build = 0, major = 0, patch = 0;
u8 part_str[TXGBE_PBANUM_LENGTH];
u32 etrack_id = 0;
err = pci_enable_device_mem(pdev);
if (err)
return err;
@ -457,6 +480,12 @@ static int txgbe_probe(struct pci_dev *pdev,
if (err)
goto err_free_mac_table;
err = wx_mng_present(wxhw);
if (err) {
dev_err(&pdev->dev, "Management capability is not present\n");
goto err_free_mac_table;
}
err = txgbe_reset_hw(hw);
if (err) {
dev_err(&pdev->dev, "HW Init failed: %d\n", err);
@ -465,12 +494,59 @@ static int txgbe_probe(struct pci_dev *pdev,
netdev->features |= NETIF_F_HIGHDMA;
/* make sure the EEPROM is good */
err = txgbe_validate_eeprom_checksum(hw, NULL);
if (err != 0) {
dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
wr32(wxhw, WX_MIS_RST, WX_MIS_RST_SW_RST);
err = -EIO;
goto err_free_mac_table;
}
eth_hw_addr_set(netdev, wxhw->mac.perm_addr);
txgbe_mac_set_default_filter(adapter, wxhw->mac.perm_addr);
/* Save off EEPROM version number and Option Rom version which
* together make a unique identify for the eeprom
*/
wx_read_ee_hostif(wxhw,
wxhw->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_H,
&eeprom_verh);
wx_read_ee_hostif(wxhw,
wxhw->eeprom.sw_region_offset + TXGBE_EEPROM_VERSION_L,
&eeprom_verl);
etrack_id = (eeprom_verh << 16) | eeprom_verl;
wx_read_ee_hostif(wxhw,
wxhw->eeprom.sw_region_offset + TXGBE_ISCSI_BOOT_CONFIG,
&offset);
/* Make sure offset to SCSI block is valid */
if (!(offset == 0x0) && !(offset == 0xffff)) {
wx_read_ee_hostif(wxhw, offset + 0x84, &eeprom_cfg_blkh);
wx_read_ee_hostif(wxhw, offset + 0x83, &eeprom_cfg_blkl);
/* Only display Option Rom if exist */
if (eeprom_cfg_blkl && eeprom_cfg_blkh) {
major = eeprom_cfg_blkl >> 8;
build = (eeprom_cfg_blkl << 8) | (eeprom_cfg_blkh >> 8);
patch = eeprom_cfg_blkh & 0x00ff;
snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
"0x%08x, %d.%d.%d", etrack_id, major, build,
patch);
} else {
snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
"0x%08x", etrack_id);
}
} else {
snprintf(adapter->eeprom_id, sizeof(adapter->eeprom_id),
"0x%08x", etrack_id);
}
err = register_netdev(netdev);
if (err)
goto err_free_mac_table;
goto err_release_hw;
pci_set_drvdata(pdev, adapter);
@ -488,10 +564,17 @@ static int txgbe_probe(struct pci_dev *pdev,
else
dev_warn(&pdev->dev, "Failed to enumerate PF devices.\n");
/* First try to read PBA as a string */
err = txgbe_read_pba_string(hw, part_str, TXGBE_PBANUM_LENGTH);
if (err)
strncpy(part_str, "Unknown", TXGBE_PBANUM_LENGTH);
netif_info(adapter, probe, netdev, "%pM\n", netdev->dev_addr);
return 0;
err_release_hw:
wx_control_hw(wxhw, false);
err_free_mac_table:
kfree(adapter->mac_table);
err_pci_release_regions:

14
drivers/net/ethernet/wangxun/txgbe/txgbe_type.h
View File

@ -53,6 +53,20 @@
#define TXGBE_TS_CTL 0x10300
#define TXGBE_TS_CTL_EVAL_MD BIT(31)
/* Part Number String Length */
#define TXGBE_PBANUM_LENGTH 32
/* Checksum and EEPROM pointers */
#define TXGBE_EEPROM_LAST_WORD 0x800
#define TXGBE_EEPROM_CHECKSUM 0x2F
#define TXGBE_EEPROM_SUM 0xBABA
#define TXGBE_EEPROM_VERSION_L 0x1D
#define TXGBE_EEPROM_VERSION_H 0x1E
#define TXGBE_ISCSI_BOOT_CONFIG 0x07
#define TXGBE_PBANUM0_PTR 0x05
#define TXGBE_PBANUM1_PTR 0x06
#define TXGBE_PBANUM_PTR_GUARD 0xFAFA
struct txgbe_hw {
struct wx_hw wxhw;
};