diff options
Diffstat (limited to 'drivers/net/dsa/sja1105/sja1105_dynamic_config.c')
| -rw-r--r-- | drivers/net/dsa/sja1105/sja1105_dynamic_config.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c index 0023b03a010d..7e7efc2e8ee4 100644 --- a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c +++ b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c @@ -36,6 +36,7 @@ SJA1105PQRS_SIZE_MAC_CONFIG_DYN_CMD struct sja1105_dyn_cmd { + bool search; u64 valid; u64 rdwrset; u64 errors; @@ -248,6 +249,7 @@ sja1105et_general_params_entry_packing(void *buf, void *entry_ptr, #define OP_READ BIT(0) #define OP_WRITE BIT(1) #define OP_DEL BIT(2) +#define OP_SEARCH BIT(3) /* SJA1105E/T: First generation */ struct sja1105_dynamic_table_ops sja1105et_dyn_ops[BLK_IDX_MAX_DYN] = { @@ -367,6 +369,24 @@ struct sja1105_dynamic_table_ops sja1105pqrs_dyn_ops[BLK_IDX_MAX_DYN] = { [BLK_IDX_XMII_PARAMS] = {0}, }; +/* Provides read access to the settings through the dynamic interface + * of the switch. + * @blk_idx is used as key to select from the sja1105_dynamic_table_ops. + * The selection is limited by the hardware in respect to which + * configuration blocks can be read through the dynamic interface. + * @index is used to retrieve a particular table entry. If negative, + * (and if the @blk_idx supports the searching operation) a search + * is performed by the @entry parameter. + * @entry Type-casted to an unpacked structure that holds a table entry + * of the type specified in @blk_idx. + * Usually an output argument. If @index is negative, then this + * argument is used as input/output: it should be pre-populated + * with the element to search for. Entries which support the + * search operation will have an "index" field (not the @index + * argument to this function) and that is where the found index + * will be returned (or left unmodified - thus negative - if not + * found). + */ int sja1105_dynamic_config_read(struct sja1105_private *priv, enum sja1105_blk_idx blk_idx, int index, void *entry) @@ -385,6 +405,8 @@ int sja1105_dynamic_config_read(struct sja1105_private *priv, if (index >= ops->max_entry_count) return -ERANGE; + if (index < 0 && !(ops->access & OP_SEARCH)) + return -EOPNOTSUPP; if (!(ops->access & OP_READ)) return -EOPNOTSUPP; if (ops->packed_size > SJA1105_MAX_DYN_CMD_SIZE) @@ -396,9 +418,19 @@ int sja1105_dynamic_config_read(struct sja1105_private *priv, cmd.valid = true; /* Trigger action on table entry */ cmd.rdwrset = SPI_READ; /* Action is read */ - cmd.index = index; + if (index < 0) { + /* Avoid copying a signed negative number to an u64 */ + cmd.index = 0; + cmd.search = true; + } else { + cmd.index = index; + cmd.search = false; + } ops->cmd_packing(packed_buf, &cmd, PACK); + if (cmd.search) + ops->entry_packing(packed_buf, entry, PACK); + /* Send SPI write operation: read config table entry */ rc = sja1105_spi_send_packed_buf(priv, SPI_WRITE, ops->addr, packed_buf, ops->packed_size); @@ -456,6 +488,8 @@ int sja1105_dynamic_config_write(struct sja1105_private *priv, if (index >= ops->max_entry_count) return -ERANGE; + if (index < 0) + return -ERANGE; if (!(ops->access & OP_WRITE)) return -EOPNOTSUPP; if (!keep && !(ops->access & OP_DEL)) |