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i40e: Persistent LLDP support 

This patch adds a function to read NVM module data and uses it to
read current LLDP agent configuration from NVM API version 1.8.

Signed-off-by: Sylwia Wnuczko <sylwia.wnuczko@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Sylwia Wnuczko 2019-07-23 06:01:43 -04:00 committed by Jeff Kirsher
parent a39f165db5
commit 65c275e401
5 changed files with 127 additions and 1 deletions
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18
drivers/net/ethernet/intel/i40e/i40e_dcb.c
View File

@ -877,7 +877,23 @@ i40e_status i40e_init_dcb(struct i40e_hw *hw, bool enable_mib_change)
return I40E_NOT_SUPPORTED;
/* Read LLDP NVM area */
ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
if (hw->flags & I40E_HW_FLAG_FW_LLDP_PERSISTENT) {
u8 offset = 0;
if (hw->mac.type == I40E_MAC_XL710)
offset = I40E_LLDP_CURRENT_STATUS_XL710_OFFSET;
else if (hw->mac.type == I40E_MAC_X722)
offset = I40E_LLDP_CURRENT_STATUS_X722_OFFSET;
else
return I40E_NOT_SUPPORTED;
ret = i40e_read_nvm_module_data(hw,
I40E_SR_EMP_SR_SETTINGS_PTR,
offset, 1,
&lldp_cfg.adminstatus);
} else {
ret = i40e_read_lldp_cfg(hw, &lldp_cfg);
}
if (ret)
return I40E_ERR_NOT_READY;

2
drivers/net/ethernet/intel/i40e/i40e_dcb.h
View File

@ -30,6 +30,8 @@
#define I40E_CEE_SUBTYPE_APP_PRI 4
#define I40E_CEE_MAX_FEAT_TYPE 3
#define I40E_LLDP_CURRENT_STATUS_XL710_OFFSET 0x2B
#define I40E_LLDP_CURRENT_STATUS_X722_OFFSET 0x31
/* Defines for LLDP TLV header */
#define I40E_LLDP_TLV_LEN_SHIFT 0
#define I40E_LLDP_TLV_LEN_MASK (0x01FF << I40E_LLDP_TLV_LEN_SHIFT)

101
drivers/net/ethernet/intel/i40e/i40e_nvm.c
View File

@ -321,6 +321,77 @@ i40e_status i40e_read_nvm_word(struct i40e_hw *hw, u16 offset,
return ret_code;
}
/**
* i40e_read_nvm_module_data - Reads NVM Buffer to specified memory location
* @hw: pointer to the HW structure
* @module_ptr: Pointer to module in words with respect to NVM beginning
* @offset: offset in words from module start
* @words_data_size: Words to read from NVM
* @data_ptr: Pointer to memory location where resulting buffer will be stored
**/
i40e_status i40e_read_nvm_module_data(struct i40e_hw *hw,
u8 module_ptr, u16 offset,
u16 words_data_size,
u16 *data_ptr)
{
i40e_status status;
u16 ptr_value = 0;
u32 flat_offset;
if (module_ptr != 0) {
status = i40e_read_nvm_word(hw, module_ptr, &ptr_value);
if (status) {
i40e_debug(hw, I40E_DEBUG_ALL,
"Reading nvm word failed.Error code: %d.\n",
status);
return I40E_ERR_NVM;
}
}
#define I40E_NVM_INVALID_PTR_VAL 0x7FFF
#define I40E_NVM_INVALID_VAL 0xFFFF
/* Pointer not initialized */
if (ptr_value == I40E_NVM_INVALID_PTR_VAL ||
ptr_value == I40E_NVM_INVALID_VAL)
return I40E_ERR_BAD_PTR;
/* Check whether the module is in SR mapped area or outside */
if (ptr_value & I40E_PTR_TYPE) {
/* Pointer points outside of the Shared RAM mapped area */
ptr_value &= ~I40E_PTR_TYPE;
/* PtrValue in 4kB units, need to convert to words */
ptr_value /= 2;
flat_offset = ((u32)ptr_value * 0x1000) + (u32)offset;
status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
if (!status) {
status = i40e_aq_read_nvm(hw, 0, 2 * flat_offset,
2 * words_data_size,
data_ptr, true, NULL);
i40e_release_nvm(hw);
if (status) {
i40e_debug(hw, I40E_DEBUG_ALL,
"Reading nvm aq failed.Error code: %d.\n",
status);
return I40E_ERR_NVM;
}
} else {
return I40E_ERR_NVM;
}
} else {
/* Read from the Shadow RAM */
status = i40e_read_nvm_buffer(hw, ptr_value + offset,
&words_data_size, data_ptr);
if (status) {
i40e_debug(hw, I40E_DEBUG_ALL,
"Reading nvm buffer failed.Error code: %d.\n",
status);
}
}
return status;
}
/**
* i40e_read_nvm_buffer_srctl - Reads Shadow RAM buffer via SRCTL register
* @hw: pointer to the HW structure
@ -429,6 +500,36 @@ static i40e_status __i40e_read_nvm_buffer(struct i40e_hw *hw,
return i40e_read_nvm_buffer_srctl(hw, offset, words, data);
}
/**
* i40e_read_nvm_buffer - Reads Shadow RAM buffer and acquire lock if necessary
* @hw: pointer to the HW structure
* @offset: offset of the Shadow RAM word to read (0x000000 - 0x001FFF).
* @words: (in) number of words to read; (out) number of words actually read
* @data: words read from the Shadow RAM
*
* Reads 16 bit words (data buffer) from the SR using the i40e_read_nvm_srrd()
* method. The buffer read is preceded by the NVM ownership take
* and followed by the release.
**/
i40e_status i40e_read_nvm_buffer(struct i40e_hw *hw, u16 offset,
u16 *words, u16 *data)
{
i40e_status ret_code = 0;
if (hw->flags & I40E_HW_FLAG_AQ_SRCTL_ACCESS_ENABLE) {
ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
if (!ret_code) {
ret_code = i40e_read_nvm_buffer_aq(hw, offset, words,
data);
i40e_release_nvm(hw);
}
} else {
ret_code = i40e_read_nvm_buffer_srctl(hw, offset, words, data);
}
return ret_code;
}
/**
* i40e_write_nvm_aq - Writes Shadow RAM.
* @hw: pointer to the HW structure.

6
drivers/net/ethernet/intel/i40e/i40e_prototype.h
View File

@ -315,6 +315,12 @@ i40e_status i40e_acquire_nvm(struct i40e_hw *hw,
void i40e_release_nvm(struct i40e_hw *hw);
i40e_status i40e_read_nvm_word(struct i40e_hw *hw, u16 offset,
u16 *data);
i40e_status i40e_read_nvm_module_data(struct i40e_hw *hw,
u8 module_ptr, u16 offset,
u16 words_data_size,
u16 *data_ptr);
i40e_status i40e_read_nvm_buffer(struct i40e_hw *hw, u16 offset,
u16 *words, u16 *data);
i40e_status i40e_update_nvm_checksum(struct i40e_hw *hw);
i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
u16 *checksum);

1
drivers/net/ethernet/intel/i40e/i40e_type.h
View File

@ -1318,6 +1318,7 @@ struct i40e_hw_port_stats {
#define I40E_SR_VPD_PTR 0x2F
#define I40E_SR_PCIE_ALT_AUTO_LOAD_PTR 0x3E
#define I40E_SR_SW_CHECKSUM_WORD 0x3F
#define I40E_SR_EMP_SR_SETTINGS_PTR 0x48
/* Auxiliary field, mask and shift definition for Shadow RAM and NVM Flash */
#define I40E_SR_VPD_MODULE_MAX_SIZE 1024