ionic: support longer tx sg lists

The version 1 Tx queues can use longer SG lists than the
original version 0 queues, but we need to check to see if the
firmware supports the v1 Tx queues.  This implements the queue
type query for all queue types, and uses the information to
set up for using the longer Tx SG lists.

Because the Tx SG list can be longer, we need to limit the
max ring length to be sure we stay inside the boundaries of a
DMA allocation max size, so we lower the max Tx ring size.

The driver sets its highest known version in the Q_IDENTITY
command, and the FW returns the highest version that it knows,
bounded by the driver's version.  The negotiated version number
is later used in the Q_INIT commands.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 587398b01997..33519a8765eb 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -12,7 +12,8 @@
 
 #define IONIC_MIN_MTU			ETH_MIN_MTU
 #define IONIC_MAX_MTU			9194
-#define IONIC_MAX_TXRX_DESC		16384
+#define IONIC_MAX_TX_DESC		8192
+#define IONIC_MAX_RX_DESC		16384
 #define IONIC_MIN_TXRX_DESC		16
 #define IONIC_DEF_TXRX_DESC		4096
 #define IONIC_LIFS_MAX			1024
@@ -83,6 +84,8 @@ static_assert(sizeof(struct ionic_q_init_cmd) == 64);
 static_assert(sizeof(struct ionic_q_init_comp) == 16);
 static_assert(sizeof(struct ionic_q_control_cmd) == 64);
 static_assert(sizeof(ionic_q_control_comp) == 16);
+static_assert(sizeof(struct ionic_q_identify_cmd) == 64);
+static_assert(sizeof(struct ionic_q_identify_comp) == 16);
 
 static_assert(sizeof(struct ionic_rx_mode_set_cmd) == 64);
 static_assert(sizeof(ionic_rx_mode_set_comp) == 16);
@@ -283,6 +286,8 @@ void ionic_dev_cmd_port_fec(struct ionic_dev *idev, u8 fec_type);
 void ionic_dev_cmd_port_pause(struct ionic_dev *idev, u8 pause_type);
 
 int ionic_set_vf_config(struct ionic *ionic, int vf, u8 attr, u8 *data);
+void ionic_dev_cmd_queue_identify(struct ionic_dev *idev,
+				  u16 lif_type, u8 qtype, u8 qver);
 void ionic_dev_cmd_lif_identify(struct ionic_dev *idev, u8 type, u8 ver);
 void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index,
 			    dma_addr_t addr);