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1019 lines
35 KiB
1019 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Copyright (c) 2018-2019, Vladimir Oltean <[email protected]> |
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*/ |
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#include "sja1105.h" |
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|
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/* In the dynamic configuration interface, the switch exposes a register-like |
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* view of some of the static configuration tables. |
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* Many times the field organization of the dynamic tables is abbreviated (not |
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* all fields are dynamically reconfigurable) and different from the static |
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* ones, but the key reason for having it is that we can spare a switch reset |
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* for settings that can be changed dynamically. |
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* |
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* This file creates a per-switch-family abstraction called |
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* struct sja1105_dynamic_table_ops and two operations that work with it: |
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* - sja1105_dynamic_config_write |
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* - sja1105_dynamic_config_read |
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* |
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* Compared to the struct sja1105_table_ops from sja1105_static_config.c, |
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* the dynamic accessors work with a compound buffer: |
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* |
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* packed_buf |
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* |
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* | |
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* V |
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* +-----------------------------------------+------------------+ |
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* | ENTRY BUFFER | COMMAND BUFFER | |
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* +-----------------------------------------+------------------+ |
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* |
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* <----------------------- packed_size ------------------------> |
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* |
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* The ENTRY BUFFER may or may not have the same layout, or size, as its static |
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* configuration table entry counterpart. When it does, the same packing |
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* function is reused (bar exceptional cases - see |
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* sja1105pqrs_dyn_l2_lookup_entry_packing). |
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* |
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* The reason for the COMMAND BUFFER being at the end is to be able to send |
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* a dynamic write command through a single SPI burst. By the time the switch |
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* reacts to the command, the ENTRY BUFFER is already populated with the data |
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* sent by the core. |
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* |
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* The COMMAND BUFFER is always SJA1105_SIZE_DYN_CMD bytes (one 32-bit word) in |
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* size. |
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* |
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* Sometimes the ENTRY BUFFER does not really exist (when the number of fields |
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* that can be reconfigured is small), then the switch repurposes some of the |
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* unused 32 bits of the COMMAND BUFFER to hold ENTRY data. |
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* |
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* The key members of struct sja1105_dynamic_table_ops are: |
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* - .entry_packing: A function that deals with packing an ENTRY structure |
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* into an SPI buffer, or retrieving an ENTRY structure |
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* from one. |
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* The @packed_buf pointer it's given does always point to |
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* the ENTRY portion of the buffer. |
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* - .cmd_packing: A function that deals with packing/unpacking the COMMAND |
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* structure to/from the SPI buffer. |
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* It is given the same @packed_buf pointer as .entry_packing, |
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* so most of the time, the @packed_buf points *behind* the |
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* COMMAND offset inside the buffer. |
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* To access the COMMAND portion of the buffer, the function |
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* knows its correct offset. |
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* Giving both functions the same pointer is handy because in |
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* extreme cases (see sja1105pqrs_dyn_l2_lookup_entry_packing) |
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* the .entry_packing is able to jump to the COMMAND portion, |
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* or vice-versa (sja1105pqrs_l2_lookup_cmd_packing). |
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* - .access: A bitmap of: |
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* OP_READ: Set if the hardware manual marks the ENTRY portion of the |
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* dynamic configuration table buffer as R (readable) after |
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* an SPI read command (the switch will populate the buffer). |
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* OP_WRITE: Set if the manual marks the ENTRY portion of the dynamic |
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* table buffer as W (writable) after an SPI write command |
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* (the switch will read the fields provided in the buffer). |
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* OP_DEL: Set if the manual says the VALIDENT bit is supported in the |
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* COMMAND portion of this dynamic config buffer (i.e. the |
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* specified entry can be invalidated through a SPI write |
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* command). |
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* OP_SEARCH: Set if the manual says that the index of an entry can |
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* be retrieved in the COMMAND portion of the buffer based |
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* on its ENTRY portion, as a result of a SPI write command. |
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* Only the TCAM-based FDB table on SJA1105 P/Q/R/S supports |
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* this. |
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* - .max_entry_count: The number of entries, counting from zero, that can be |
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* reconfigured through the dynamic interface. If a static |
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* table can be reconfigured at all dynamically, this |
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* number always matches the maximum number of supported |
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* static entries. |
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* - .packed_size: The length in bytes of the compound ENTRY + COMMAND BUFFER. |
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* Note that sometimes the compound buffer may contain holes in |
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* it (see sja1105_vlan_lookup_cmd_packing). The @packed_buf is |
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* contiguous however, so @packed_size includes any unused |
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* bytes. |
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* - .addr: The base SPI address at which the buffer must be written to the |
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* switch's memory. When looking at the hardware manual, this must |
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* always match the lowest documented address for the ENTRY, and not |
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* that of the COMMAND, since the other 32-bit words will follow along |
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* at the correct addresses. |
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*/ |
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|
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#define SJA1105_SIZE_DYN_CMD 4 |
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|
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#define SJA1105ET_SIZE_VL_LOOKUP_DYN_CMD \ |
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SJA1105_SIZE_DYN_CMD |
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#define SJA1105PQRS_SIZE_VL_LOOKUP_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105_SIZE_VL_LOOKUP_ENTRY) |
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#define SJA1105ET_SIZE_MAC_CONFIG_DYN_ENTRY \ |
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SJA1105_SIZE_DYN_CMD |
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#define SJA1105ET_SIZE_L2_LOOKUP_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105ET_SIZE_L2_LOOKUP_ENTRY) |
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#define SJA1105PQRS_SIZE_L2_LOOKUP_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY) |
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#define SJA1105_SIZE_VLAN_LOOKUP_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + 4 + SJA1105_SIZE_VLAN_LOOKUP_ENTRY) |
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#define SJA1105_SIZE_L2_FORWARDING_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105_SIZE_L2_FORWARDING_ENTRY) |
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#define SJA1105ET_SIZE_MAC_CONFIG_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105ET_SIZE_MAC_CONFIG_DYN_ENTRY) |
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#define SJA1105PQRS_SIZE_MAC_CONFIG_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_MAC_CONFIG_ENTRY) |
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#define SJA1105ET_SIZE_L2_LOOKUP_PARAMS_DYN_CMD \ |
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SJA1105_SIZE_DYN_CMD |
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|
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#define SJA1105PQRS_SIZE_L2_LOOKUP_PARAMS_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_L2_LOOKUP_PARAMS_ENTRY) |
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#define SJA1105ET_SIZE_GENERAL_PARAMS_DYN_CMD \ |
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SJA1105_SIZE_DYN_CMD |
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#define SJA1105PQRS_SIZE_GENERAL_PARAMS_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_GENERAL_PARAMS_ENTRY) |
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#define SJA1105PQRS_SIZE_AVB_PARAMS_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_AVB_PARAMS_ENTRY) |
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#define SJA1105_SIZE_RETAGGING_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105_SIZE_RETAGGING_ENTRY) |
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#define SJA1105ET_SIZE_CBS_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105ET_SIZE_CBS_ENTRY) |
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#define SJA1105PQRS_SIZE_CBS_DYN_CMD \ |
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(SJA1105_SIZE_DYN_CMD + SJA1105PQRS_SIZE_CBS_ENTRY) |
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#define SJA1105_MAX_DYN_CMD_SIZE \ |
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SJA1105PQRS_SIZE_GENERAL_PARAMS_DYN_CMD |
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struct sja1105_dyn_cmd { |
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bool search; |
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u64 valid; |
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u64 rdwrset; |
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u64 errors; |
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u64 valident; |
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u64 index; |
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}; |
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enum sja1105_hostcmd { |
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SJA1105_HOSTCMD_SEARCH = 1, |
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SJA1105_HOSTCMD_READ = 2, |
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SJA1105_HOSTCMD_WRITE = 3, |
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SJA1105_HOSTCMD_INVALIDATE = 4, |
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}; |
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static void |
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sja1105_vl_lookup_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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const int size = SJA1105_SIZE_DYN_CMD; |
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sja1105_packing(buf, &cmd->valid, 31, 31, size, op); |
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sja1105_packing(buf, &cmd->errors, 30, 30, size, op); |
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sja1105_packing(buf, &cmd->rdwrset, 29, 29, size, op); |
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sja1105_packing(buf, &cmd->index, 9, 0, size, op); |
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} |
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static size_t sja1105et_vl_lookup_entry_packing(void *buf, void *entry_ptr, |
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enum packing_op op) |
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{ |
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struct sja1105_vl_lookup_entry *entry = entry_ptr; |
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const int size = SJA1105ET_SIZE_VL_LOOKUP_DYN_CMD; |
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sja1105_packing(buf, &entry->egrmirr, 21, 17, size, op); |
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sja1105_packing(buf, &entry->ingrmirr, 16, 16, size, op); |
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return size; |
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} |
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static void |
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sja1105pqrs_l2_lookup_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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u64 hostcmd; |
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sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
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sja1105_packing(p, &cmd->rdwrset, 30, 30, size, op); |
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sja1105_packing(p, &cmd->errors, 29, 29, size, op); |
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sja1105_packing(p, &cmd->valident, 27, 27, size, op); |
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/* VALIDENT is supposed to indicate "keep or not", but in SJA1105 E/T, |
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* using it to delete a management route was unsupported. UM10944 |
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* said about it: |
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* |
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* In case of a write access with the MGMTROUTE flag set, |
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* the flag will be ignored. It will always be found cleared |
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* for read accesses with the MGMTROUTE flag set. |
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* |
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* SJA1105 P/Q/R/S keeps the same behavior w.r.t. VALIDENT, but there |
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* is now another flag called HOSTCMD which does more stuff (quoting |
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* from UM11040): |
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* |
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* A write request is accepted only when HOSTCMD is set to write host |
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* or invalid. A read request is accepted only when HOSTCMD is set to |
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* search host or read host. |
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* |
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* So it is possible to translate a RDWRSET/VALIDENT combination into |
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* HOSTCMD so that we keep the dynamic command API in place, and |
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* at the same time achieve compatibility with the management route |
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* command structure. |
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*/ |
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if (cmd->rdwrset == SPI_READ) { |
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if (cmd->search) |
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hostcmd = SJA1105_HOSTCMD_SEARCH; |
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else |
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hostcmd = SJA1105_HOSTCMD_READ; |
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} else { |
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/* SPI_WRITE */ |
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if (cmd->valident) |
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hostcmd = SJA1105_HOSTCMD_WRITE; |
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else |
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hostcmd = SJA1105_HOSTCMD_INVALIDATE; |
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} |
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sja1105_packing(p, &hostcmd, 25, 23, size, op); |
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/* Hack - The hardware takes the 'index' field within |
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* struct sja1105_l2_lookup_entry as the index on which this command |
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* will operate. However it will ignore everything else, so 'index' |
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* is logically part of command but physically part of entry. |
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* Populate the 'index' entry field from within the command callback, |
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* such that our API doesn't need to ask for a full-blown entry |
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* structure when e.g. a delete is requested. |
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*/ |
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sja1105_packing(buf, &cmd->index, 15, 6, |
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SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY, op); |
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} |
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/* The switch is so retarded that it makes our command/entry abstraction |
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* crumble apart. |
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* |
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* On P/Q/R/S, the switch tries to say whether a FDB entry |
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* is statically programmed or dynamically learned via a flag called LOCKEDS. |
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* The hardware manual says about this fiels: |
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* |
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* On write will specify the format of ENTRY. |
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* On read the flag will be found cleared at times the VALID flag is found |
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* set. The flag will also be found cleared in response to a read having the |
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* MGMTROUTE flag set. In response to a read with the MGMTROUTE flag |
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* cleared, the flag be set if the most recent access operated on an entry |
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* that was either loaded by configuration or through dynamic reconfiguration |
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* (as opposed to automatically learned entries). |
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* |
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* The trouble with this flag is that it's part of the *command* to access the |
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* dynamic interface, and not part of the *entry* retrieved from it. |
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* Otherwise said, for a sja1105_dynamic_config_read, LOCKEDS is supposed to be |
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* an output from the switch into the command buffer, and for a |
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* sja1105_dynamic_config_write, the switch treats LOCKEDS as an input |
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* (hence we can write either static, or automatically learned entries, from |
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* the core). |
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* But the manual contradicts itself in the last phrase where it says that on |
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* read, LOCKEDS will be set to 1 for all FDB entries written through the |
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* dynamic interface (therefore, the value of LOCKEDS from the |
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* sja1105_dynamic_config_write is not really used for anything, it'll store a |
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* 1 anyway). |
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* This means you can't really write a FDB entry with LOCKEDS=0 (automatically |
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* learned) into the switch, which kind of makes sense. |
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* As for reading through the dynamic interface, it doesn't make too much sense |
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* to put LOCKEDS into the command, since the switch will inevitably have to |
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* ignore it (otherwise a command would be like "read the FDB entry 123, but |
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* only if it's dynamically learned" <- well how am I supposed to know?) and |
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* just use it as an output buffer for its findings. But guess what... that's |
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* what the entry buffer is for! |
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* Unfortunately, what really breaks this abstraction is the fact that it |
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* wasn't designed having the fact in mind that the switch can output |
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* entry-related data as writeback through the command buffer. |
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* However, whether a FDB entry is statically or dynamically learned *is* part |
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* of the entry and not the command data, no matter what the switch thinks. |
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* In order to do that, we'll need to wrap around the |
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* sja1105pqrs_l2_lookup_entry_packing from sja1105_static_config.c, and take |
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* a peek outside of the caller-supplied @buf (the entry buffer), to reach the |
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* command buffer. |
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*/ |
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static size_t |
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sja1105pqrs_dyn_l2_lookup_entry_packing(void *buf, void *entry_ptr, |
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enum packing_op op) |
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{ |
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struct sja1105_l2_lookup_entry *entry = entry_ptr; |
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u8 *cmd = buf + SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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sja1105_packing(cmd, &entry->lockeds, 28, 28, size, op); |
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return sja1105pqrs_l2_lookup_entry_packing(buf, entry_ptr, op); |
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} |
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static void |
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sja1105et_l2_lookup_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105ET_SIZE_L2_LOOKUP_ENTRY; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
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sja1105_packing(p, &cmd->rdwrset, 30, 30, size, op); |
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sja1105_packing(p, &cmd->errors, 29, 29, size, op); |
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sja1105_packing(p, &cmd->valident, 27, 27, size, op); |
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/* Hack - see comments above. */ |
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sja1105_packing(buf, &cmd->index, 29, 20, |
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SJA1105ET_SIZE_L2_LOOKUP_ENTRY, op); |
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} |
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static size_t sja1105et_dyn_l2_lookup_entry_packing(void *buf, void *entry_ptr, |
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enum packing_op op) |
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{ |
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struct sja1105_l2_lookup_entry *entry = entry_ptr; |
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u8 *cmd = buf + SJA1105ET_SIZE_L2_LOOKUP_ENTRY; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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sja1105_packing(cmd, &entry->lockeds, 28, 28, size, op); |
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return sja1105et_l2_lookup_entry_packing(buf, entry_ptr, op); |
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} |
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static void |
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sja1105et_mgmt_route_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105ET_SIZE_L2_LOOKUP_ENTRY; |
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u64 mgmtroute = 1; |
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sja1105et_l2_lookup_cmd_packing(buf, cmd, op); |
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if (op == PACK) |
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sja1105_pack(p, &mgmtroute, 26, 26, SJA1105_SIZE_DYN_CMD); |
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} |
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static size_t sja1105et_mgmt_route_entry_packing(void *buf, void *entry_ptr, |
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enum packing_op op) |
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{ |
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struct sja1105_mgmt_entry *entry = entry_ptr; |
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const size_t size = SJA1105ET_SIZE_L2_LOOKUP_ENTRY; |
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|
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/* UM10944: To specify if a PTP egress timestamp shall be captured on |
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* each port upon transmission of the frame, the LSB of VLANID in the |
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* ENTRY field provided by the host must be set. |
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* Bit 1 of VLANID then specifies the register where the timestamp for |
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* this port is stored in. |
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*/ |
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sja1105_packing(buf, &entry->tsreg, 85, 85, size, op); |
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sja1105_packing(buf, &entry->takets, 84, 84, size, op); |
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sja1105_packing(buf, &entry->macaddr, 83, 36, size, op); |
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sja1105_packing(buf, &entry->destports, 35, 31, size, op); |
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sja1105_packing(buf, &entry->enfport, 30, 30, size, op); |
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return size; |
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} |
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|
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static void |
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sja1105pqrs_mgmt_route_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY; |
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u64 mgmtroute = 1; |
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|
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sja1105pqrs_l2_lookup_cmd_packing(buf, cmd, op); |
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if (op == PACK) |
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sja1105_pack(p, &mgmtroute, 26, 26, SJA1105_SIZE_DYN_CMD); |
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} |
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|
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static size_t sja1105pqrs_mgmt_route_entry_packing(void *buf, void *entry_ptr, |
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enum packing_op op) |
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{ |
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const size_t size = SJA1105PQRS_SIZE_L2_LOOKUP_ENTRY; |
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struct sja1105_mgmt_entry *entry = entry_ptr; |
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|
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/* In P/Q/R/S, enfport got renamed to mgmtvalid, but its purpose |
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* is the same (driver uses it to confirm that frame was sent). |
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* So just keep the name from E/T. |
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*/ |
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sja1105_packing(buf, &entry->tsreg, 71, 71, size, op); |
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sja1105_packing(buf, &entry->takets, 70, 70, size, op); |
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sja1105_packing(buf, &entry->macaddr, 69, 22, size, op); |
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sja1105_packing(buf, &entry->destports, 21, 17, size, op); |
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sja1105_packing(buf, &entry->enfport, 16, 16, size, op); |
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return size; |
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} |
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|
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/* In E/T, entry is at addresses 0x27-0x28. There is a 4 byte gap at 0x29, |
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* and command is at 0x2a. Similarly in P/Q/R/S there is a 1 register gap |
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* between entry (0x2d, 0x2e) and command (0x30). |
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*/ |
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static void |
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sja1105_vlan_lookup_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105_SIZE_VLAN_LOOKUP_ENTRY + 4; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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|
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sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
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sja1105_packing(p, &cmd->rdwrset, 30, 30, size, op); |
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sja1105_packing(p, &cmd->valident, 27, 27, size, op); |
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/* Hack - see comments above, applied for 'vlanid' field of |
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* struct sja1105_vlan_lookup_entry. |
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*/ |
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sja1105_packing(buf, &cmd->index, 38, 27, |
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SJA1105_SIZE_VLAN_LOOKUP_ENTRY, op); |
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} |
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|
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static void |
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sja1105_l2_forwarding_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
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u8 *p = buf + SJA1105_SIZE_L2_FORWARDING_ENTRY; |
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const int size = SJA1105_SIZE_DYN_CMD; |
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|
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sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
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sja1105_packing(p, &cmd->errors, 30, 30, size, op); |
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sja1105_packing(p, &cmd->rdwrset, 29, 29, size, op); |
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sja1105_packing(p, &cmd->index, 4, 0, size, op); |
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} |
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|
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static void |
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sja1105et_mac_config_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
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enum packing_op op) |
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{ |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
/* Yup, user manual definitions are reversed */ |
|
u8 *reg1 = buf + 4; |
|
|
|
sja1105_packing(reg1, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(reg1, &cmd->index, 26, 24, size, op); |
|
} |
|
|
|
static size_t sja1105et_mac_config_entry_packing(void *buf, void *entry_ptr, |
|
enum packing_op op) |
|
{ |
|
const int size = SJA1105ET_SIZE_MAC_CONFIG_DYN_ENTRY; |
|
struct sja1105_mac_config_entry *entry = entry_ptr; |
|
/* Yup, user manual definitions are reversed */ |
|
u8 *reg1 = buf + 4; |
|
u8 *reg2 = buf; |
|
|
|
sja1105_packing(reg1, &entry->speed, 30, 29, size, op); |
|
sja1105_packing(reg1, &entry->drpdtag, 23, 23, size, op); |
|
sja1105_packing(reg1, &entry->drpuntag, 22, 22, size, op); |
|
sja1105_packing(reg1, &entry->retag, 21, 21, size, op); |
|
sja1105_packing(reg1, &entry->dyn_learn, 20, 20, size, op); |
|
sja1105_packing(reg1, &entry->egress, 19, 19, size, op); |
|
sja1105_packing(reg1, &entry->ingress, 18, 18, size, op); |
|
sja1105_packing(reg1, &entry->ing_mirr, 17, 17, size, op); |
|
sja1105_packing(reg1, &entry->egr_mirr, 16, 16, size, op); |
|
sja1105_packing(reg1, &entry->vlanprio, 14, 12, size, op); |
|
sja1105_packing(reg1, &entry->vlanid, 11, 0, size, op); |
|
sja1105_packing(reg2, &entry->tp_delin, 31, 16, size, op); |
|
sja1105_packing(reg2, &entry->tp_delout, 15, 0, size, op); |
|
/* MAC configuration table entries which can't be reconfigured: |
|
* top, base, enabled, ifg, maxage, drpnona664 |
|
*/ |
|
/* Bogus return value, not used anywhere */ |
|
return 0; |
|
} |
|
|
|
static void |
|
sja1105pqrs_mac_config_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
const int size = SJA1105ET_SIZE_MAC_CONFIG_DYN_ENTRY; |
|
u8 *p = buf + SJA1105PQRS_SIZE_MAC_CONFIG_ENTRY; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->errors, 30, 30, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 29, 29, size, op); |
|
sja1105_packing(p, &cmd->index, 2, 0, size, op); |
|
} |
|
|
|
static void |
|
sja1105et_l2_lookup_params_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
sja1105_packing(buf, &cmd->valid, 31, 31, |
|
SJA1105ET_SIZE_L2_LOOKUP_PARAMS_DYN_CMD, op); |
|
} |
|
|
|
static size_t |
|
sja1105et_l2_lookup_params_entry_packing(void *buf, void *entry_ptr, |
|
enum packing_op op) |
|
{ |
|
struct sja1105_l2_lookup_params_entry *entry = entry_ptr; |
|
|
|
sja1105_packing(buf, &entry->poly, 7, 0, |
|
SJA1105ET_SIZE_L2_LOOKUP_PARAMS_DYN_CMD, op); |
|
/* Bogus return value, not used anywhere */ |
|
return 0; |
|
} |
|
|
|
static void |
|
sja1105pqrs_l2_lookup_params_cmd_packing(void *buf, |
|
struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105PQRS_SIZE_L2_LOOKUP_PARAMS_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 30, 30, size, op); |
|
} |
|
|
|
static void |
|
sja1105et_general_params_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
const int size = SJA1105ET_SIZE_GENERAL_PARAMS_DYN_CMD; |
|
|
|
sja1105_packing(buf, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(buf, &cmd->errors, 30, 30, size, op); |
|
} |
|
|
|
static size_t |
|
sja1105et_general_params_entry_packing(void *buf, void *entry_ptr, |
|
enum packing_op op) |
|
{ |
|
struct sja1105_general_params_entry *entry = entry_ptr; |
|
const int size = SJA1105ET_SIZE_GENERAL_PARAMS_DYN_CMD; |
|
|
|
sja1105_packing(buf, &entry->mirr_port, 2, 0, size, op); |
|
/* Bogus return value, not used anywhere */ |
|
return 0; |
|
} |
|
|
|
static void |
|
sja1105pqrs_general_params_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105PQRS_SIZE_GENERAL_PARAMS_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->errors, 30, 30, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 28, 28, size, op); |
|
} |
|
|
|
static void |
|
sja1105pqrs_avb_params_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105PQRS_SIZE_AVB_PARAMS_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->errors, 30, 30, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 29, 29, size, op); |
|
} |
|
|
|
static void |
|
sja1105_retagging_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105_SIZE_RETAGGING_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->errors, 30, 30, size, op); |
|
sja1105_packing(p, &cmd->valident, 29, 29, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 28, 28, size, op); |
|
sja1105_packing(p, &cmd->index, 5, 0, size, op); |
|
} |
|
|
|
static void sja1105et_cbs_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105ET_SIZE_CBS_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->index, 19, 16, size, op); |
|
} |
|
|
|
static size_t sja1105et_cbs_entry_packing(void *buf, void *entry_ptr, |
|
enum packing_op op) |
|
{ |
|
const size_t size = SJA1105ET_SIZE_CBS_ENTRY; |
|
struct sja1105_cbs_entry *entry = entry_ptr; |
|
u8 *cmd = buf + size; |
|
u32 *p = buf; |
|
|
|
sja1105_packing(cmd, &entry->port, 5, 3, SJA1105_SIZE_DYN_CMD, op); |
|
sja1105_packing(cmd, &entry->prio, 2, 0, SJA1105_SIZE_DYN_CMD, op); |
|
sja1105_packing(p + 3, &entry->credit_lo, 31, 0, size, op); |
|
sja1105_packing(p + 2, &entry->credit_hi, 31, 0, size, op); |
|
sja1105_packing(p + 1, &entry->send_slope, 31, 0, size, op); |
|
sja1105_packing(p + 0, &entry->idle_slope, 31, 0, size, op); |
|
return size; |
|
} |
|
|
|
static void sja1105pqrs_cbs_cmd_packing(void *buf, struct sja1105_dyn_cmd *cmd, |
|
enum packing_op op) |
|
{ |
|
u8 *p = buf + SJA1105PQRS_SIZE_CBS_ENTRY; |
|
const int size = SJA1105_SIZE_DYN_CMD; |
|
|
|
sja1105_packing(p, &cmd->valid, 31, 31, size, op); |
|
sja1105_packing(p, &cmd->rdwrset, 30, 30, size, op); |
|
sja1105_packing(p, &cmd->errors, 29, 29, size, op); |
|
sja1105_packing(p, &cmd->index, 3, 0, size, op); |
|
} |
|
|
|
static size_t sja1105pqrs_cbs_entry_packing(void *buf, void *entry_ptr, |
|
enum packing_op op) |
|
{ |
|
const size_t size = SJA1105PQRS_SIZE_CBS_ENTRY; |
|
struct sja1105_cbs_entry *entry = entry_ptr; |
|
|
|
sja1105_packing(buf, &entry->port, 159, 157, size, op); |
|
sja1105_packing(buf, &entry->prio, 156, 154, size, op); |
|
sja1105_packing(buf, &entry->credit_lo, 153, 122, size, op); |
|
sja1105_packing(buf, &entry->credit_hi, 121, 90, size, op); |
|
sja1105_packing(buf, &entry->send_slope, 89, 58, size, op); |
|
sja1105_packing(buf, &entry->idle_slope, 57, 26, size, op); |
|
return size; |
|
} |
|
|
|
#define OP_READ BIT(0) |
|
#define OP_WRITE BIT(1) |
|
#define OP_DEL BIT(2) |
|
#define OP_SEARCH BIT(3) |
|
|
|
/* SJA1105E/T: First generation */ |
|
const struct sja1105_dynamic_table_ops sja1105et_dyn_ops[BLK_IDX_MAX_DYN] = { |
|
[BLK_IDX_VL_LOOKUP] = { |
|
.entry_packing = sja1105et_vl_lookup_entry_packing, |
|
.cmd_packing = sja1105_vl_lookup_cmd_packing, |
|
.access = OP_WRITE, |
|
.max_entry_count = SJA1105_MAX_VL_LOOKUP_COUNT, |
|
.packed_size = SJA1105ET_SIZE_VL_LOOKUP_DYN_CMD, |
|
.addr = 0x35, |
|
}, |
|
[BLK_IDX_L2_LOOKUP] = { |
|
.entry_packing = sja1105et_dyn_l2_lookup_entry_packing, |
|
.cmd_packing = sja1105et_l2_lookup_cmd_packing, |
|
.access = (OP_READ | OP_WRITE | OP_DEL), |
|
.max_entry_count = SJA1105_MAX_L2_LOOKUP_COUNT, |
|
.packed_size = SJA1105ET_SIZE_L2_LOOKUP_DYN_CMD, |
|
.addr = 0x20, |
|
}, |
|
[BLK_IDX_MGMT_ROUTE] = { |
|
.entry_packing = sja1105et_mgmt_route_entry_packing, |
|
.cmd_packing = sja1105et_mgmt_route_cmd_packing, |
|
.access = (OP_READ | OP_WRITE), |
|
.max_entry_count = SJA1105_NUM_PORTS, |
|
.packed_size = SJA1105ET_SIZE_L2_LOOKUP_DYN_CMD, |
|
.addr = 0x20, |
|
}, |
|
[BLK_IDX_VLAN_LOOKUP] = { |
|
.entry_packing = sja1105_vlan_lookup_entry_packing, |
|
.cmd_packing = sja1105_vlan_lookup_cmd_packing, |
|
.access = (OP_WRITE | OP_DEL), |
|
.max_entry_count = SJA1105_MAX_VLAN_LOOKUP_COUNT, |
|
.packed_size = SJA1105_SIZE_VLAN_LOOKUP_DYN_CMD, |
|
.addr = 0x27, |
|
}, |
|
[BLK_IDX_L2_FORWARDING] = { |
|
.entry_packing = sja1105_l2_forwarding_entry_packing, |
|
.cmd_packing = sja1105_l2_forwarding_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_L2_FORWARDING_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105_SIZE_L2_FORWARDING_DYN_CMD, |
|
.addr = 0x24, |
|
}, |
|
[BLK_IDX_MAC_CONFIG] = { |
|
.entry_packing = sja1105et_mac_config_entry_packing, |
|
.cmd_packing = sja1105et_mac_config_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_MAC_CONFIG_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105ET_SIZE_MAC_CONFIG_DYN_CMD, |
|
.addr = 0x36, |
|
}, |
|
[BLK_IDX_L2_LOOKUP_PARAMS] = { |
|
.entry_packing = sja1105et_l2_lookup_params_entry_packing, |
|
.cmd_packing = sja1105et_l2_lookup_params_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_L2_LOOKUP_PARAMS_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105ET_SIZE_L2_LOOKUP_PARAMS_DYN_CMD, |
|
.addr = 0x38, |
|
}, |
|
[BLK_IDX_GENERAL_PARAMS] = { |
|
.entry_packing = sja1105et_general_params_entry_packing, |
|
.cmd_packing = sja1105et_general_params_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_GENERAL_PARAMS_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105ET_SIZE_GENERAL_PARAMS_DYN_CMD, |
|
.addr = 0x34, |
|
}, |
|
[BLK_IDX_RETAGGING] = { |
|
.entry_packing = sja1105_retagging_entry_packing, |
|
.cmd_packing = sja1105_retagging_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_RETAGGING_COUNT, |
|
.access = (OP_WRITE | OP_DEL), |
|
.packed_size = SJA1105_SIZE_RETAGGING_DYN_CMD, |
|
.addr = 0x31, |
|
}, |
|
[BLK_IDX_CBS] = { |
|
.entry_packing = sja1105et_cbs_entry_packing, |
|
.cmd_packing = sja1105et_cbs_cmd_packing, |
|
.max_entry_count = SJA1105ET_MAX_CBS_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105ET_SIZE_CBS_DYN_CMD, |
|
.addr = 0x2c, |
|
}, |
|
}; |
|
|
|
/* SJA1105P/Q/R/S: Second generation */ |
|
const struct sja1105_dynamic_table_ops sja1105pqrs_dyn_ops[BLK_IDX_MAX_DYN] = { |
|
[BLK_IDX_VL_LOOKUP] = { |
|
.entry_packing = sja1105_vl_lookup_entry_packing, |
|
.cmd_packing = sja1105_vl_lookup_cmd_packing, |
|
.access = (OP_READ | OP_WRITE), |
|
.max_entry_count = SJA1105_MAX_VL_LOOKUP_COUNT, |
|
.packed_size = SJA1105PQRS_SIZE_VL_LOOKUP_DYN_CMD, |
|
.addr = 0x47, |
|
}, |
|
[BLK_IDX_L2_LOOKUP] = { |
|
.entry_packing = sja1105pqrs_dyn_l2_lookup_entry_packing, |
|
.cmd_packing = sja1105pqrs_l2_lookup_cmd_packing, |
|
.access = (OP_READ | OP_WRITE | OP_DEL | OP_SEARCH), |
|
.max_entry_count = SJA1105_MAX_L2_LOOKUP_COUNT, |
|
.packed_size = SJA1105PQRS_SIZE_L2_LOOKUP_DYN_CMD, |
|
.addr = 0x24, |
|
}, |
|
[BLK_IDX_MGMT_ROUTE] = { |
|
.entry_packing = sja1105pqrs_mgmt_route_entry_packing, |
|
.cmd_packing = sja1105pqrs_mgmt_route_cmd_packing, |
|
.access = (OP_READ | OP_WRITE | OP_DEL | OP_SEARCH), |
|
.max_entry_count = SJA1105_NUM_PORTS, |
|
.packed_size = SJA1105PQRS_SIZE_L2_LOOKUP_DYN_CMD, |
|
.addr = 0x24, |
|
}, |
|
[BLK_IDX_VLAN_LOOKUP] = { |
|
.entry_packing = sja1105_vlan_lookup_entry_packing, |
|
.cmd_packing = sja1105_vlan_lookup_cmd_packing, |
|
.access = (OP_READ | OP_WRITE | OP_DEL), |
|
.max_entry_count = SJA1105_MAX_VLAN_LOOKUP_COUNT, |
|
.packed_size = SJA1105_SIZE_VLAN_LOOKUP_DYN_CMD, |
|
.addr = 0x2D, |
|
}, |
|
[BLK_IDX_L2_FORWARDING] = { |
|
.entry_packing = sja1105_l2_forwarding_entry_packing, |
|
.cmd_packing = sja1105_l2_forwarding_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_L2_FORWARDING_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105_SIZE_L2_FORWARDING_DYN_CMD, |
|
.addr = 0x2A, |
|
}, |
|
[BLK_IDX_MAC_CONFIG] = { |
|
.entry_packing = sja1105pqrs_mac_config_entry_packing, |
|
.cmd_packing = sja1105pqrs_mac_config_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_MAC_CONFIG_COUNT, |
|
.access = (OP_READ | OP_WRITE), |
|
.packed_size = SJA1105PQRS_SIZE_MAC_CONFIG_DYN_CMD, |
|
.addr = 0x4B, |
|
}, |
|
[BLK_IDX_L2_LOOKUP_PARAMS] = { |
|
.entry_packing = sja1105pqrs_l2_lookup_params_entry_packing, |
|
.cmd_packing = sja1105pqrs_l2_lookup_params_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_L2_LOOKUP_PARAMS_COUNT, |
|
.access = (OP_READ | OP_WRITE), |
|
.packed_size = SJA1105PQRS_SIZE_L2_LOOKUP_PARAMS_DYN_CMD, |
|
.addr = 0x54, |
|
}, |
|
[BLK_IDX_AVB_PARAMS] = { |
|
.entry_packing = sja1105pqrs_avb_params_entry_packing, |
|
.cmd_packing = sja1105pqrs_avb_params_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_AVB_PARAMS_COUNT, |
|
.access = (OP_READ | OP_WRITE), |
|
.packed_size = SJA1105PQRS_SIZE_AVB_PARAMS_DYN_CMD, |
|
.addr = 0x8003, |
|
}, |
|
[BLK_IDX_GENERAL_PARAMS] = { |
|
.entry_packing = sja1105pqrs_general_params_entry_packing, |
|
.cmd_packing = sja1105pqrs_general_params_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_GENERAL_PARAMS_COUNT, |
|
.access = (OP_READ | OP_WRITE), |
|
.packed_size = SJA1105PQRS_SIZE_GENERAL_PARAMS_DYN_CMD, |
|
.addr = 0x3B, |
|
}, |
|
[BLK_IDX_RETAGGING] = { |
|
.entry_packing = sja1105_retagging_entry_packing, |
|
.cmd_packing = sja1105_retagging_cmd_packing, |
|
.max_entry_count = SJA1105_MAX_RETAGGING_COUNT, |
|
.access = (OP_READ | OP_WRITE | OP_DEL), |
|
.packed_size = SJA1105_SIZE_RETAGGING_DYN_CMD, |
|
.addr = 0x38, |
|
}, |
|
[BLK_IDX_CBS] = { |
|
.entry_packing = sja1105pqrs_cbs_entry_packing, |
|
.cmd_packing = sja1105pqrs_cbs_cmd_packing, |
|
.max_entry_count = SJA1105PQRS_MAX_CBS_COUNT, |
|
.access = OP_WRITE, |
|
.packed_size = SJA1105PQRS_SIZE_CBS_DYN_CMD, |
|
.addr = 0x32, |
|
}, |
|
}; |
|
|
|
/* 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) |
|
{ |
|
const struct sja1105_dynamic_table_ops *ops; |
|
struct sja1105_dyn_cmd cmd = {0}; |
|
/* SPI payload buffer */ |
|
u8 packed_buf[SJA1105_MAX_DYN_CMD_SIZE] = {0}; |
|
int retries = 3; |
|
int rc; |
|
|
|
if (blk_idx >= BLK_IDX_MAX_DYN) |
|
return -ERANGE; |
|
|
|
ops = &priv->info->dyn_ops[blk_idx]; |
|
|
|
if (index >= 0 && 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) |
|
return -ERANGE; |
|
if (!ops->cmd_packing) |
|
return -EOPNOTSUPP; |
|
if (!ops->entry_packing) |
|
return -EOPNOTSUPP; |
|
|
|
cmd.valid = true; /* Trigger action on table entry */ |
|
cmd.rdwrset = SPI_READ; /* Action is read */ |
|
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; |
|
} |
|
cmd.valident = true; |
|
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_xfer_buf(priv, SPI_WRITE, ops->addr, packed_buf, |
|
ops->packed_size); |
|
if (rc < 0) |
|
return rc; |
|
|
|
/* Loop until we have confirmation that hardware has finished |
|
* processing the command and has cleared the VALID field |
|
*/ |
|
do { |
|
memset(packed_buf, 0, ops->packed_size); |
|
|
|
/* Retrieve the read operation's result */ |
|
rc = sja1105_xfer_buf(priv, SPI_READ, ops->addr, packed_buf, |
|
ops->packed_size); |
|
if (rc < 0) |
|
return rc; |
|
|
|
cmd = (struct sja1105_dyn_cmd) {0}; |
|
ops->cmd_packing(packed_buf, &cmd, UNPACK); |
|
/* UM10944: [valident] will always be found cleared |
|
* during a read access with MGMTROUTE set. |
|
* So don't error out in that case. |
|
*/ |
|
if (!cmd.valident && blk_idx != BLK_IDX_MGMT_ROUTE) |
|
return -ENOENT; |
|
cpu_relax(); |
|
} while (cmd.valid && --retries); |
|
|
|
if (cmd.valid) |
|
return -ETIMEDOUT; |
|
|
|
/* Don't dereference possibly NULL pointer - maybe caller |
|
* only wanted to see whether the entry existed or not. |
|
*/ |
|
if (entry) |
|
ops->entry_packing(packed_buf, entry, UNPACK); |
|
return 0; |
|
} |
|
|
|
int sja1105_dynamic_config_write(struct sja1105_private *priv, |
|
enum sja1105_blk_idx blk_idx, |
|
int index, void *entry, bool keep) |
|
{ |
|
const struct sja1105_dynamic_table_ops *ops; |
|
struct sja1105_dyn_cmd cmd = {0}; |
|
/* SPI payload buffer */ |
|
u8 packed_buf[SJA1105_MAX_DYN_CMD_SIZE] = {0}; |
|
int rc; |
|
|
|
if (blk_idx >= BLK_IDX_MAX_DYN) |
|
return -ERANGE; |
|
|
|
ops = &priv->info->dyn_ops[blk_idx]; |
|
|
|
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)) |
|
return -EOPNOTSUPP; |
|
if (ops->packed_size > SJA1105_MAX_DYN_CMD_SIZE) |
|
return -ERANGE; |
|
|
|
cmd.valident = keep; /* If false, deletes entry */ |
|
cmd.valid = true; /* Trigger action on table entry */ |
|
cmd.rdwrset = SPI_WRITE; /* Action is write */ |
|
cmd.index = index; |
|
|
|
if (!ops->cmd_packing) |
|
return -EOPNOTSUPP; |
|
ops->cmd_packing(packed_buf, &cmd, PACK); |
|
|
|
if (!ops->entry_packing) |
|
return -EOPNOTSUPP; |
|
/* Don't dereference potentially NULL pointer if just |
|
* deleting a table entry is what was requested. For cases |
|
* where 'index' field is physically part of entry structure, |
|
* and needed here, we deal with that in the cmd_packing callback. |
|
*/ |
|
if (keep) |
|
ops->entry_packing(packed_buf, entry, PACK); |
|
|
|
/* Send SPI write operation: read config table entry */ |
|
rc = sja1105_xfer_buf(priv, SPI_WRITE, ops->addr, packed_buf, |
|
ops->packed_size); |
|
if (rc < 0) |
|
return rc; |
|
|
|
cmd = (struct sja1105_dyn_cmd) {0}; |
|
ops->cmd_packing(packed_buf, &cmd, UNPACK); |
|
if (cmd.errors) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static u8 sja1105_crc8_add(u8 crc, u8 byte, u8 poly) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < 8; i++) { |
|
if ((crc ^ byte) & (1 << 7)) { |
|
crc <<= 1; |
|
crc ^= poly; |
|
} else { |
|
crc <<= 1; |
|
} |
|
byte <<= 1; |
|
} |
|
return crc; |
|
} |
|
|
|
/* CRC8 algorithm with non-reversed input, non-reversed output, |
|
* no input xor and no output xor. Code customized for receiving |
|
* the SJA1105 E/T FDB keys (vlanid, macaddr) as input. CRC polynomial |
|
* is also received as argument in the Koopman notation that the switch |
|
* hardware stores it in. |
|
*/ |
|
u8 sja1105et_fdb_hash(struct sja1105_private *priv, const u8 *addr, u16 vid) |
|
{ |
|
struct sja1105_l2_lookup_params_entry *l2_lookup_params = |
|
priv->static_config.tables[BLK_IDX_L2_LOOKUP_PARAMS].entries; |
|
u64 poly_koopman = l2_lookup_params->poly; |
|
/* Convert polynomial from Koopman to 'normal' notation */ |
|
u8 poly = (u8)(1 + (poly_koopman << 1)); |
|
u64 vlanid = l2_lookup_params->shared_learn ? 0 : vid; |
|
u64 input = (vlanid << 48) | ether_addr_to_u64(addr); |
|
u8 crc = 0; /* seed */ |
|
int i; |
|
|
|
/* Mask the eight bytes starting from MSB one at a time */ |
|
for (i = 56; i >= 0; i -= 8) { |
|
u8 byte = (input & (0xffull << i)) >> i; |
|
|
|
crc = sja1105_crc8_add(crc, byte, poly); |
|
} |
|
return crc; |
|
}
|
|
|