Only a single dynamic configuration table of the SJA1105 P/Q/R/S
supports this operation: the FDB.
To keep the existing structure in place (sja1105_dynamic_config_read and
sja1105_dynamic_config_write) and not introduce any new function, a
convention is made for sja1105_dynamic_config_read that a negative index
argument denotes a search for the entry provided as argument.
Signed-off-by: Vladimir Oltean <olte...@gmail.com>
---
.../net/dsa/sja1105/sja1105_dynamic_config.c | 36 ++++++++++++++++++-
.../net/dsa/sja1105/sja1105_dynamic_config.h | 3 ++
2 files changed, 38 insertions(+), 1 deletion(-)
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))
diff --git a/drivers/net/dsa/sja1105/sja1105_dynamic_config.h
b/drivers/net/dsa/sja1105/sja1105_dynamic_config.h
index 49c611eb02cb..740dadf43f01 100644
--- a/drivers/net/dsa/sja1105/sja1105_dynamic_config.h
+++ b/drivers/net/dsa/sja1105/sja1105_dynamic_config.h
@@ -7,6 +7,9 @@
#include "sja1105.h"
#include <linux/packing.h>
+/* Special index that can be used for sja1105_dynamic_config_read */
+#define SJA1105_SEARCH -1
+
struct sja1105_dyn_cmd;
struct sja1105_dynamic_table_ops {
--
2.17.1
