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>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_dcb.c b/drivers/net/ethernet/intel/i40e/i40e_dcb.c
index 292eeb3..200a1cb 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_dcb.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_dcb.c
@@ -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;
 

diff --git a/drivers/net/ethernet/intel/i40e/i40e_dcb.h b/drivers/net/ethernet/intel/i40e/i40e_dcb.h
index ddb48ae..2a80c5d 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_dcb.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_dcb.h
@@ -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)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index c508b75..e4d8d20 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -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.

diff --git a/drivers/net/ethernet/intel/i40e/i40e_prototype.h b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
index 9c810d5..5250441 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_prototype.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_prototype.h
@@ -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);

diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h b/drivers/net/ethernet/intel/i40e/i40e_type.h
index 7c1d576..b43ec94 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_type.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
@@ -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