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| author |   Karicheri, Muralidharan <m-karicheri2@ti.com> | 2017-01-06 15:37:45 -0500 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-01-07 21:03:50 -0500 |
| commit | 7938a0d75fd64ce419b1cdf16aa182fa0fd1acd6 (patch) | |
| tree | 34b903b46d8c5b49cb8fa80b850797adeec87a53 /drivers/net/ethernet/ti/cpsw_ale.c | |
| parent | net: netcp: ale: update to support unknown vlan controls for NU switch (diff) | |
| download | linux-dev-7938a0d75fd64ce419b1cdf16aa182fa0fd1acd6.tar.xz linux-dev-7938a0d75fd64ce419b1cdf16aa182fa0fd1acd6.zip | |
net: netcp: ale: use ale_status to size the ale table
ALE h/w on newer version of NetCP (K2E/L/G) does provide a ALE_STATUS
register for the size of the ALE Table implemented in h/w. Currently
for example we set ALE Table size to 1024 for NetCP ALE on
K2E even though the ALE Status/Documentation shows it has 8192 entries.
So take advantage of this register to read the size of ALE table supported
and use that value in the driver for the newer version of NetCP ALE.
For NetCP lite, ALE Table size is much less (64) and indicated by a size
of zero in ALE_STATUS. So use that as a default for now. While at it,
also fix the ale table size on 10G switch to 2048 per User guide
http://www.ti.com/lit/ug/spruhj5/spruhj5.pdf
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/ti/cpsw_ale.c')
| -rw-r--r-- | drivers/net/ethernet/ti/cpsw_ale.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c index e15db39a2b69..62a18d61e0aa 100644 --- a/drivers/net/ethernet/ti/cpsw_ale.c +++ b/drivers/net/ethernet/ti/cpsw_ale.c @@ -33,6 +33,7 @@ /* ALE Registers */ #define ALE_IDVER 0x00 +#define ALE_STATUS 0x04 #define ALE_CONTROL 0x08 #define ALE_PRESCALE 0x10 #define ALE_UNKNOWNVLAN 0x18 @@ -58,6 +59,10 @@ #define ALE_UCAST_OUI 2 #define ALE_UCAST_TOUCHED 3 +#define ALE_TABLE_SIZE_MULTIPLIER 1024 +#define ALE_STATUS_SIZE_MASK 0x1f +#define ALE_TABLE_SIZE_DEFAULT 64 + static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits) { int idx; @@ -728,7 +733,7 @@ static void cpsw_ale_timer(unsigned long arg) void cpsw_ale_start(struct cpsw_ale *ale) { - u32 rev; + u32 rev, ale_entries; rev = __raw_readl(ale->params.ale_regs + ALE_IDVER); if (!ale->params.major_ver_mask) @@ -740,6 +745,30 @@ void cpsw_ale_start(struct cpsw_ale *ale) ALE_VERSION_MAJOR(rev, ale->params.major_ver_mask), ALE_VERSION_MINOR(rev)); + if (!ale->params.ale_entries) { + ale_entries = + __raw_readl(ale->params.ale_regs + ALE_STATUS) & + ALE_STATUS_SIZE_MASK; + /* ALE available on newer NetCP switches has introduced + * a register, ALE_STATUS, to indicate the size of ALE + * table which shows the size as a multiple of 1024 entries. + * For these, params.ale_entries will be set to zero. So + * read the register and update the value of ale_entries. + * ALE table on NetCP lite, is much smaller and is indicated + * by a value of zero in ALE_STATUS. So use a default value + * of ALE_TABLE_SIZE_DEFAULT for this. Caller is expected + * to set the value of ale_entries for all other versions + * of ALE. + */ + if (!ale_entries) + ale_entries = ALE_TABLE_SIZE_DEFAULT; + else + ale_entries *= ALE_TABLE_SIZE_MULTIPLIER; + ale->params.ale_entries = ale_entries; + } + dev_info(ale->params.dev, + "ALE Table size %ld\n", ale->params.ale_entries); + if (ale->params.nu_switch_ale) { /* Separate registers for unknown vlan configuration. * Also there are N bits, where N is number of ale |