cxgb4: RSS table is 4k for T6

RSS table is 4k for T6 and later cards, add check for the
same.

Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 36 insertions, 23 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
index d73fb6a85f8e..336670d00a52 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
@@ -1004,9 +1004,10 @@ int cudbg_collect_rss(struct cudbg_init *pdbg_init,
 {
 	struct adapter *padap = pdbg_init->adap;
 	struct cudbg_buffer temp_buff = { 0 };
-	int rc;
+	int rc, nentries;
 
-	rc = cudbg_get_buff(dbg_buff, RSS_NENTRIES * sizeof(u16), &temp_buff);
+	nentries = t4_chip_rss_size(padap);
+	rc = cudbg_get_buff(dbg_buff, nentries * sizeof(u16), &temp_buff);
 	if (rc)
 		return rc;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index b1df2aa6be94..69d0b64e6986 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -1528,6 +1528,7 @@ int t4_init_portinfo(struct port_info *pi, int mbox,
 		     int port, int pf, int vf, u8 mac[]);
 int t4_port_init(struct adapter *adap, int mbox, int pf, int vf);
 void t4_fatal_err(struct adapter *adapter);
+unsigned int t4_chip_rss_size(struct adapter *adapter);
 int t4_config_rss_range(struct adapter *adapter, int mbox, unsigned int viid,
 			int start, int n, const u16 *rspq, unsigned int nrspq);
 int t4_config_glbl_rss(struct adapter *adapter, int mbox, unsigned int mode,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
index 41c8736314f8..581d628f01cc 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_cudbg.c
@@ -179,7 +179,7 @@ static u32 cxgb4_get_entity_length(struct adapter *adap, u32 entity)
 		len = cudbg_mbytes_to_bytes(len);
 		break;
 	case CUDBG_RSS:
-		len = RSS_NENTRIES * sizeof(u16);
+		len = t4_chip_rss_size(adap) * sizeof(u16);
 		break;
 	case CUDBG_RSS_VF_CONF:
 		len = adap->params.arch.vfcount *
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
index d8efcd9e55d3..d3ced0438474 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_debugfs.c
@@ -2021,11 +2021,12 @@ static int rss_show(struct seq_file *seq, void *v, int idx)
 
 static int rss_open(struct inode *inode, struct file *file)
 {
-	int ret;
-	struct seq_tab *p;
 	struct adapter *adap = inode->i_private;
+	int ret, nentries;
+	struct seq_tab *p;
 
-	p = seq_open_tab(file, RSS_NENTRIES / 8, 8 * sizeof(u16), 0, rss_show);
+	nentries = t4_chip_rss_size(adap);
+	p = seq_open_tab(file, nentries / 8, 8 * sizeof(u16), 0, rss_show);
 	if (!p)
 		return -ENOMEM;
 
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index d18e708c21c5..44930ca06c4b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -4927,6 +4927,14 @@ void t4_intr_disable(struct adapter *adapter)
 	t4_set_reg_field(adapter, PL_INT_MAP0_A, 1 << pf, 0);
 }
 
+unsigned int t4_chip_rss_size(struct adapter *adap)
+{
+	if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5)
+		return RSS_NENTRIES;
+	else
+		return T6_RSS_NENTRIES;
+}
+
 /**
  *	t4_config_rss_range - configure a portion of the RSS mapping table
  *	@adapter: the adapter
@@ -5065,10 +5073,11 @@ static int rd_rss_row(struct adapter *adap, int row, u32 *val)
  */
 int t4_read_rss(struct adapter *adapter, u16 *map)
 {
+	int i, ret, nentries;
 	u32 val;
-	int i, ret;
 
-	for (i = 0; i < RSS_NENTRIES / 2; ++i) {
+	nentries = t4_chip_rss_size(adapter);
+	for (i = 0; i < nentries / 2; ++i) {
 		ret = rd_rss_row(adapter, i, &val);
 		if (ret)
 			return ret;
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
index 872a91b1930c..361d5032c288 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.h
@@ -38,21 +38,22 @@
 #include <linux/types.h>
 
 enum {
-	NCHAN          = 4,     /* # of HW channels */
-	MAX_MTU        = 9600,  /* max MAC MTU, excluding header + FCS */
-	EEPROMSIZE     = 17408, /* Serial EEPROM physical size */
-	EEPROMVSIZE    = 32768, /* Serial EEPROM virtual address space size */
-	EEPROMPFSIZE   = 1024,  /* EEPROM writable area size for PFn, n>0 */
-	RSS_NENTRIES   = 2048,  /* # of entries in RSS mapping table */
-	TCB_SIZE       = 128,   /* TCB size */
-	NMTUS          = 16,    /* size of MTU table */
-	NCCTRL_WIN     = 32,    /* # of congestion control windows */
-	NTX_SCHED      = 8,     /* # of HW Tx scheduling queues */
-	PM_NSTATS      = 5,     /* # of PM stats */
-	T6_PM_NSTATS   = 7,     /* # of PM stats in T6 */
-	MBOX_LEN       = 64,    /* mailbox size in bytes */
-	TRACE_LEN      = 112,   /* length of trace data and mask */
-	FILTER_OPT_LEN = 36,    /* filter tuple width for optional components */
+	NCHAN           = 4,    /* # of HW channels */
+	MAX_MTU         = 9600, /* max MAC MTU, excluding header + FCS */
+	EEPROMSIZE      = 17408,/* Serial EEPROM physical size */
+	EEPROMVSIZE     = 32768,/* Serial EEPROM virtual address space size */
+	EEPROMPFSIZE    = 1024, /* EEPROM writable area size for PFn, n>0 */
+	RSS_NENTRIES    = 2048, /* # of entries in RSS mapping table */
+	T6_RSS_NENTRIES = 4096, /* # of entries in RSS mapping table */
+	TCB_SIZE        = 128,  /* TCB size */
+	NMTUS           = 16,   /* size of MTU table */
+	NCCTRL_WIN      = 32,   /* # of congestion control windows */
+	NTX_SCHED       = 8,    /* # of HW Tx scheduling queues */
+	PM_NSTATS       = 5,    /* # of PM stats */
+	T6_PM_NSTATS    = 7,    /* # of PM stats in T6 */
+	MBOX_LEN        = 64,   /* mailbox size in bytes */
+	TRACE_LEN       = 112,  /* length of trace data and mask */
+	FILTER_OPT_LEN  = 36,   /* filter tuple width for optional components */
 };
 
 enum {