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path: root/drivers/net/ethernet/intel/i40e/i40e_nvm.c
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Diffstat (limited to 'drivers/net/ethernet/intel/i40e/i40e_nvm.c')
-rw-r--r--drivers/net/ethernet/intel/i40e/i40e_nvm.c520
1 files changed, 512 insertions, 8 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_nvm.c b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
index 81299189a47d..25c4f9a3011f 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_nvm.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_nvm.c
@@ -241,6 +241,46 @@ i40e_status i40e_read_nvm_buffer(struct i40e_hw *hw, u16 offset,
}
/**
+ * i40e_write_nvm_aq - Writes Shadow RAM.
+ * @hw: pointer to the HW structure.
+ * @module_pointer: module pointer location in words from the NVM beginning
+ * @offset: offset in words from module start
+ * @words: number of words to write
+ * @data: buffer with words to write to the Shadow RAM
+ * @last_command: tells the AdminQ that this is the last command
+ *
+ * Writes a 16 bit words buffer to the Shadow RAM using the admin command.
+ **/
+static i40e_status i40e_write_nvm_aq(struct i40e_hw *hw, u8 module_pointer,
+ u32 offset, u16 words, void *data,
+ bool last_command)
+{
+ i40e_status ret_code = I40E_ERR_NVM;
+
+ /* Here we are checking the SR limit only for the flat memory model.
+ * We cannot do it for the module-based model, as we did not acquire
+ * the NVM resource yet (we cannot get the module pointer value).
+ * Firmware will check the module-based model.
+ */
+ if ((offset + words) > hw->nvm.sr_size)
+ hw_dbg(hw, "NVM write error: offset beyond Shadow RAM limit.\n");
+ else if (words > I40E_SR_SECTOR_SIZE_IN_WORDS)
+ /* We can write only up to 4KB (one sector), in one AQ write */
+ hw_dbg(hw, "NVM write fail error: cannot write more than 4KB in a single write.\n");
+ else if (((offset + (words - 1)) / I40E_SR_SECTOR_SIZE_IN_WORDS)
+ != (offset / I40E_SR_SECTOR_SIZE_IN_WORDS))
+ /* A single write cannot spread over two sectors */
+ hw_dbg(hw, "NVM write error: cannot spread over two sectors in a single write.\n");
+ else
+ ret_code = i40e_aq_update_nvm(hw, module_pointer,
+ 2 * offset, /*bytes*/
+ 2 * words, /*bytes*/
+ data, last_command, NULL);
+
+ return ret_code;
+}
+
+/**
* i40e_calc_nvm_checksum - Calculates and returns the checksum
* @hw: pointer to hardware structure
* @checksum: pointer to the checksum
@@ -310,6 +350,27 @@ i40e_calc_nvm_checksum_exit:
}
/**
+ * i40e_update_nvm_checksum - Updates the NVM checksum
+ * @hw: pointer to hardware structure
+ *
+ * NVM ownership must be acquired before calling this function and released
+ * on ARQ completion event reception by caller.
+ * This function will commit SR to NVM.
+ **/
+i40e_status i40e_update_nvm_checksum(struct i40e_hw *hw)
+{
+ i40e_status ret_code = 0;
+ u16 checksum;
+
+ ret_code = i40e_calc_nvm_checksum(hw, &checksum);
+ if (!ret_code)
+ ret_code = i40e_write_nvm_aq(hw, 0x00, I40E_SR_SW_CHECKSUM_WORD,
+ 1, &checksum, true);
+
+ return ret_code;
+}
+
+/**
* i40e_validate_nvm_checksum - Validate EEPROM checksum
* @hw: pointer to hardware structure
* @checksum: calculated checksum
@@ -324,13 +385,9 @@ i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
u16 checksum_sr = 0;
u16 checksum_local = 0;
- ret_code = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
- if (ret_code)
- goto i40e_validate_nvm_checksum_exit;
-
ret_code = i40e_calc_nvm_checksum(hw, &checksum_local);
if (ret_code)
- goto i40e_validate_nvm_checksum_free;
+ goto i40e_validate_nvm_checksum_exit;
/* Do not use i40e_read_nvm_word() because we do not want to take
* the synchronization semaphores twice here.
@@ -347,9 +404,456 @@ i40e_status i40e_validate_nvm_checksum(struct i40e_hw *hw,
if (checksum)
*checksum = checksum_local;
-i40e_validate_nvm_checksum_free:
- i40e_release_nvm(hw);
-
i40e_validate_nvm_checksum_exit:
return ret_code;
}
+
+static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno);
+static i40e_status i40e_nvmupd_state_reading(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno);
+static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno);
+static enum i40e_nvmupd_cmd i40e_nvmupd_validate_command(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ int *errno);
+static i40e_status i40e_nvmupd_nvm_erase(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ int *errno);
+static i40e_status i40e_nvmupd_nvm_write(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno);
+static i40e_status i40e_nvmupd_nvm_read(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno);
+static inline u8 i40e_nvmupd_get_module(u32 val)
+{
+ return (u8)(val & I40E_NVM_MOD_PNT_MASK);
+}
+static inline u8 i40e_nvmupd_get_transaction(u32 val)
+{
+ return (u8)((val & I40E_NVM_TRANS_MASK) >> I40E_NVM_TRANS_SHIFT);
+}
+
+/**
+ * i40e_nvmupd_command - Process an NVM update command
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * Dispatches command depending on what update state is current
+ **/
+i40e_status i40e_nvmupd_command(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status;
+
+ /* assume success */
+ *errno = 0;
+
+ switch (hw->nvmupd_state) {
+ case I40E_NVMUPD_STATE_INIT:
+ status = i40e_nvmupd_state_init(hw, cmd, bytes, errno);
+ break;
+
+ case I40E_NVMUPD_STATE_READING:
+ status = i40e_nvmupd_state_reading(hw, cmd, bytes, errno);
+ break;
+
+ case I40E_NVMUPD_STATE_WRITING:
+ status = i40e_nvmupd_state_writing(hw, cmd, bytes, errno);
+ break;
+
+ default:
+ /* invalid state, should never happen */
+ status = I40E_NOT_SUPPORTED;
+ *errno = -ESRCH;
+ break;
+ }
+ return status;
+}
+
+/**
+ * i40e_nvmupd_state_init - Handle NVM update state Init
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * Process legitimate commands of the Init state and conditionally set next
+ * state. Reject all other commands.
+ **/
+static i40e_status i40e_nvmupd_state_init(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status = 0;
+ enum i40e_nvmupd_cmd upd_cmd;
+
+ upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
+
+ switch (upd_cmd) {
+ case I40E_NVMUPD_READ_SA:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
+ i40e_release_nvm(hw);
+ }
+ break;
+
+ case I40E_NVMUPD_READ_SNT:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_READ);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
+ hw->nvmupd_state = I40E_NVMUPD_STATE_READING;
+ }
+ break;
+
+ case I40E_NVMUPD_WRITE_ERA:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_nvmupd_nvm_erase(hw, cmd, errno);
+ if (status)
+ i40e_release_nvm(hw);
+ else
+ hw->aq.nvm_release_on_done = true;
+ }
+ break;
+
+ case I40E_NVMUPD_WRITE_SA:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
+ if (status)
+ i40e_release_nvm(hw);
+ else
+ hw->aq.nvm_release_on_done = true;
+ }
+ break;
+
+ case I40E_NVMUPD_WRITE_SNT:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
+ hw->nvmupd_state = I40E_NVMUPD_STATE_WRITING;
+ }
+ break;
+
+ case I40E_NVMUPD_CSUM_SA:
+ status = i40e_acquire_nvm(hw, I40E_RESOURCE_WRITE);
+ if (status) {
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+ } else {
+ status = i40e_update_nvm_checksum(hw);
+ if (status) {
+ *errno = hw->aq.asq_last_status ?
+ i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+ -EIO;
+ i40e_release_nvm(hw);
+ } else {
+ hw->aq.nvm_release_on_done = true;
+ }
+ }
+ break;
+
+ default:
+ status = I40E_ERR_NVM;
+ *errno = -ESRCH;
+ break;
+ }
+ return status;
+}
+
+/**
+ * i40e_nvmupd_state_reading - Handle NVM update state Reading
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * NVM ownership is already held. Process legitimate commands and set any
+ * change in state; reject all other commands.
+ **/
+static i40e_status i40e_nvmupd_state_reading(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status;
+ enum i40e_nvmupd_cmd upd_cmd;
+
+ upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
+
+ switch (upd_cmd) {
+ case I40E_NVMUPD_READ_SA:
+ case I40E_NVMUPD_READ_CON:
+ status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
+ break;
+
+ case I40E_NVMUPD_READ_LCB:
+ status = i40e_nvmupd_nvm_read(hw, cmd, bytes, errno);
+ i40e_release_nvm(hw);
+ hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+ break;
+
+ default:
+ status = I40E_NOT_SUPPORTED;
+ *errno = -ESRCH;
+ break;
+ }
+ return status;
+}
+
+/**
+ * i40e_nvmupd_state_writing - Handle NVM update state Writing
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * NVM ownership is already held. Process legitimate commands and set any
+ * change in state; reject all other commands
+ **/
+static i40e_status i40e_nvmupd_state_writing(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status;
+ enum i40e_nvmupd_cmd upd_cmd;
+
+ upd_cmd = i40e_nvmupd_validate_command(hw, cmd, errno);
+
+ switch (upd_cmd) {
+ case I40E_NVMUPD_WRITE_CON:
+ status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
+ break;
+
+ case I40E_NVMUPD_WRITE_LCB:
+ status = i40e_nvmupd_nvm_write(hw, cmd, bytes, errno);
+ if (!status) {
+ hw->aq.nvm_release_on_done = true;
+ hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+ }
+ break;
+
+ case I40E_NVMUPD_CSUM_CON:
+ status = i40e_update_nvm_checksum(hw);
+ if (status)
+ *errno = hw->aq.asq_last_status ?
+ i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+ -EIO;
+ break;
+
+ case I40E_NVMUPD_CSUM_LCB:
+ status = i40e_update_nvm_checksum(hw);
+ if (status) {
+ *errno = hw->aq.asq_last_status ?
+ i40e_aq_rc_to_posix(hw->aq.asq_last_status) :
+ -EIO;
+ } else {
+ hw->aq.nvm_release_on_done = true;
+ hw->nvmupd_state = I40E_NVMUPD_STATE_INIT;
+ }
+ break;
+
+ default:
+ status = I40E_NOT_SUPPORTED;
+ *errno = -ESRCH;
+ break;
+ }
+ return status;
+}
+
+/**
+ * i40e_nvmupd_validate_command - Validate given command
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @errno: pointer to return error code
+ *
+ * Return one of the valid command types or I40E_NVMUPD_INVALID
+ **/
+static enum i40e_nvmupd_cmd i40e_nvmupd_validate_command(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ int *errno)
+{
+ enum i40e_nvmupd_cmd upd_cmd;
+ u8 transaction, module;
+
+ /* anything that doesn't match a recognized case is an error */
+ upd_cmd = I40E_NVMUPD_INVALID;
+
+ transaction = i40e_nvmupd_get_transaction(cmd->config);
+ module = i40e_nvmupd_get_module(cmd->config);
+
+ /* limits on data size */
+ if ((cmd->data_size < 1) ||
+ (cmd->data_size > I40E_NVMUPD_MAX_DATA)) {
+ hw_dbg(hw, "i40e_nvmupd_validate_command data_size %d\n",
+ cmd->data_size);
+ *errno = -EFAULT;
+ return I40E_NVMUPD_INVALID;
+ }
+
+ switch (cmd->command) {
+ case I40E_NVM_READ:
+ switch (transaction) {
+ case I40E_NVM_CON:
+ upd_cmd = I40E_NVMUPD_READ_CON;
+ break;
+ case I40E_NVM_SNT:
+ upd_cmd = I40E_NVMUPD_READ_SNT;
+ break;
+ case I40E_NVM_LCB:
+ upd_cmd = I40E_NVMUPD_READ_LCB;
+ break;
+ case I40E_NVM_SA:
+ upd_cmd = I40E_NVMUPD_READ_SA;
+ break;
+ }
+ break;
+
+ case I40E_NVM_WRITE:
+ switch (transaction) {
+ case I40E_NVM_CON:
+ upd_cmd = I40E_NVMUPD_WRITE_CON;
+ break;
+ case I40E_NVM_SNT:
+ upd_cmd = I40E_NVMUPD_WRITE_SNT;
+ break;
+ case I40E_NVM_LCB:
+ upd_cmd = I40E_NVMUPD_WRITE_LCB;
+ break;
+ case I40E_NVM_SA:
+ upd_cmd = I40E_NVMUPD_WRITE_SA;
+ break;
+ case I40E_NVM_ERA:
+ upd_cmd = I40E_NVMUPD_WRITE_ERA;
+ break;
+ case I40E_NVM_CSUM:
+ upd_cmd = I40E_NVMUPD_CSUM_CON;
+ break;
+ case (I40E_NVM_CSUM|I40E_NVM_SA):
+ upd_cmd = I40E_NVMUPD_CSUM_SA;
+ break;
+ case (I40E_NVM_CSUM|I40E_NVM_LCB):
+ upd_cmd = I40E_NVMUPD_CSUM_LCB;
+ break;
+ }
+ break;
+ }
+
+ if (upd_cmd == I40E_NVMUPD_INVALID) {
+ *errno = -EFAULT;
+ hw_dbg(hw,
+ "i40e_nvmupd_validate_command returns %d errno: %d\n",
+ upd_cmd, *errno);
+ }
+ return upd_cmd;
+}
+
+/**
+ * i40e_nvmupd_nvm_read - Read NVM
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * cmd structure contains identifiers and data buffer
+ **/
+static i40e_status i40e_nvmupd_nvm_read(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status;
+ u8 module, transaction;
+ bool last;
+
+ transaction = i40e_nvmupd_get_transaction(cmd->config);
+ module = i40e_nvmupd_get_module(cmd->config);
+ last = (transaction == I40E_NVM_LCB) || (transaction == I40E_NVM_SA);
+ hw_dbg(hw, "i40e_nvmupd_nvm_read mod 0x%x off 0x%x len 0x%x\n",
+ module, cmd->offset, cmd->data_size);
+
+ status = i40e_aq_read_nvm(hw, module, cmd->offset, (u16)cmd->data_size,
+ bytes, last, NULL);
+ hw_dbg(hw, "i40e_nvmupd_nvm_read status %d\n", status);
+ if (status)
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+
+ return status;
+}
+
+/**
+ * i40e_nvmupd_nvm_erase - Erase an NVM module
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @errno: pointer to return error code
+ *
+ * module, offset, data_size and data are in cmd structure
+ **/
+static i40e_status i40e_nvmupd_nvm_erase(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ int *errno)
+{
+ i40e_status status = 0;
+ u8 module, transaction;
+ bool last;
+
+ transaction = i40e_nvmupd_get_transaction(cmd->config);
+ module = i40e_nvmupd_get_module(cmd->config);
+ last = (transaction & I40E_NVM_LCB);
+ hw_dbg(hw, "i40e_nvmupd_nvm_erase mod 0x%x off 0x%x len 0x%x\n",
+ module, cmd->offset, cmd->data_size);
+ status = i40e_aq_erase_nvm(hw, module, cmd->offset, (u16)cmd->data_size,
+ last, NULL);
+ hw_dbg(hw, "i40e_nvmupd_nvm_erase status %d\n", status);
+ if (status)
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+
+ return status;
+}
+
+/**
+ * i40e_nvmupd_nvm_write - Write NVM
+ * @hw: pointer to hardware structure
+ * @cmd: pointer to nvm update command buffer
+ * @bytes: pointer to the data buffer
+ * @errno: pointer to return error code
+ *
+ * module, offset, data_size and data are in cmd structure
+ **/
+static i40e_status i40e_nvmupd_nvm_write(struct i40e_hw *hw,
+ struct i40e_nvm_access *cmd,
+ u8 *bytes, int *errno)
+{
+ i40e_status status = 0;
+ u8 module, transaction;
+ bool last;
+
+ transaction = i40e_nvmupd_get_transaction(cmd->config);
+ module = i40e_nvmupd_get_module(cmd->config);
+ last = (transaction & I40E_NVM_LCB);
+ hw_dbg(hw, "i40e_nvmupd_nvm_write mod 0x%x off 0x%x len 0x%x\n",
+ module, cmd->offset, cmd->data_size);
+ status = i40e_aq_update_nvm(hw, module, cmd->offset,
+ (u16)cmd->data_size, bytes, last, NULL);
+ hw_dbg(hw, "i40e_nvmupd_nvm_write status %d\n", status);
+ if (status)
+ *errno = i40e_aq_rc_to_posix(hw->aq.asq_last_status);
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-19 11:25:00 +0300