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Date: Sun, 22 Mar 2015 21:01:24 +0200
From: Vlad Zolotarov <vladz@...udius-systems.com>
To: netdev@...r.kernel.org
Cc: jeffrey.t.kirsher@...el.com, avi@...udius-systems.com,
gleb@...udius-systems.com,
Vlad Zolotarov <vladz@...udius-systems.com>
Subject: [PATCH net-next v6 4/7] ixgbevf: Add a RETA query code
- Added a new API version support.
- Added the query implementation in the ixgbevf.
Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com>
---
New in v6:
- Add a proper return code when an operation is blocked by PF.
New in v3:
- Adjusted to the new interface IXGBE_VF_GET_RETA command.
- Added a proper support for x550 devices.
New in v1 (compared to RFC):
- Use "if-else" statement instead of a "switch-case" for a single option case
(in ixgbevf_get_reta()).
---
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 4 +-
drivers/net/ethernet/intel/ixgbevf/mbx.h | 8 ++
drivers/net/ethernet/intel/ixgbevf/vf.c | 92 +++++++++++++++++++++++
drivers/net/ethernet/intel/ixgbevf/vf.h | 1 +
4 files changed, 104 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
index 4ee15ad..4787fcf 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
@@ -2030,7 +2030,8 @@ static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
- int api[] = { ixgbe_mbox_api_11,
+ int api[] = { ixgbe_mbox_api_12,
+ ixgbe_mbox_api_11,
ixgbe_mbox_api_10,
ixgbe_mbox_api_unknown };
int err = 0, idx = 0;
@@ -3712,6 +3713,7 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
switch (adapter->hw.api_version) {
case ixgbe_mbox_api_11:
+ case ixgbe_mbox_api_12:
max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
break;
default:
diff --git a/drivers/net/ethernet/intel/ixgbevf/mbx.h b/drivers/net/ethernet/intel/ixgbevf/mbx.h
index 6253e93..7342554 100644
--- a/drivers/net/ethernet/intel/ixgbevf/mbx.h
+++ b/drivers/net/ethernet/intel/ixgbevf/mbx.h
@@ -83,6 +83,7 @@ enum ixgbe_pfvf_api_rev {
ixgbe_mbox_api_10, /* API version 1.0, linux/freebsd VF driver */
ixgbe_mbox_api_20, /* API version 2.0, solaris Phase1 VF driver */
ixgbe_mbox_api_11, /* API version 1.1, linux/freebsd VF driver */
+ ixgbe_mbox_api_12, /* API version 1.2, linux/freebsd VF driver */
/* This value should always be last */
ixgbe_mbox_api_unknown, /* indicates that API version is not known */
};
@@ -107,6 +108,13 @@ enum ixgbe_pfvf_api_rev {
#define IXGBE_VF_TRANS_VLAN 3 /* Indication of port VLAN */
#define IXGBE_VF_DEF_QUEUE 4 /* Default queue offset */
+/* mailbox API, version 1.2 VF requests */
+#define IXGBE_VF_GET_RETA 0x0a /* VF request for RETA */
+
+/* GET_RETA request data indices within the mailbox */
+#define IXGBE_VF_RETA_SZ 1 /* Number of RETA DWs to bring */
+#define IXGBE_VF_RETA_OFFSET 2 /* Offset in RETA */
+
/* length of permanent address message returned from PF */
#define IXGBE_VF_PERMADDR_MSG_LEN 4
/* word in permanent address message with the current multicast type */
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.c b/drivers/net/ethernet/intel/ixgbevf/vf.c
index 2614fd3..f31e097 100644
--- a/drivers/net/ethernet/intel/ixgbevf/vf.c
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.c
@@ -256,6 +256,97 @@ static s32 ixgbevf_set_uc_addr_vf(struct ixgbe_hw *hw, u32 index, u8 *addr)
return ret_val;
}
+static inline int _ixgbevf_get_reta(struct ixgbe_hw *hw, u32 *msgbuf,
+ u32 *reta, u32 reta_offset_dw, u32 dwords)
+{
+ int err;
+
+ msgbuf[0] = IXGBE_VF_GET_RETA;
+ msgbuf[IXGBE_VF_RETA_SZ] = dwords;
+ msgbuf[IXGBE_VF_RETA_OFFSET] = reta_offset_dw;
+
+ err = hw->mbx.ops.write_posted(hw, msgbuf, 3);
+
+ if (err)
+ return err;
+
+ err = hw->mbx.ops.read_posted(hw, msgbuf, 1 + dwords);
+
+ if (err)
+ return err;
+
+ msgbuf[0] &= ~IXGBE_VT_MSGTYPE_CTS;
+
+ /* If the operation has been refused by a PF return -EPERM */
+ if (msgbuf[0] == (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_NACK))
+ return -EPERM;
+
+ /* If we didn't get an ACK there must have been
+ * some sort of mailbox error so we should treat it
+ * as such.
+ */
+ if (msgbuf[0] != (IXGBE_VF_GET_RETA | IXGBE_VT_MSGTYPE_ACK))
+ return IXGBE_ERR_MBX;
+
+ memcpy(reta + reta_offset_dw, msgbuf + 1, 4 * dwords);
+
+ return 0;
+}
+
+/**
+ * ixgbevf_get_reta - get the RSS redirection table (RETA) contents.
+ * @hw: pointer to the HW structure
+ * @reta: buffer to fill with RETA contents.
+ *
+ * The "reta" buffer should be big enough to contain 32 registers.
+ *
+ * Returns: 0 on success.
+ * if API doesn't support this operation - (-EPERM).
+ */
+int ixgbevf_get_reta(struct ixgbe_hw *hw, u32 *reta)
+{
+ int err;
+ u32 msgbuf[IXGBE_VFMAILBOX_SIZE];
+
+ /* Return an error if API doesn't RETA querying. */
+ if (hw->api_version != ixgbe_mbox_api_12)
+ return -EPERM;
+
+ /* x550 devices have a separate RETA for each VF: 64 bytes each.
+ *
+ * We'll get it in 2 steps due to mailbox size limitation - we can bring
+ * up to 15 dwords every time. Therefore we'll bring 12 and 4 dwords.
+ *
+ * Older devices share a RETA table with the PF: 128 bytes.
+ *
+ * For them we do it in 3 steps. Therefore we'll bring it in 3 steps:
+ * 12, 12 and 8 dwords in each step correspondingly.
+ */
+
+ /* RETA[0..11] */
+ err = _ixgbevf_get_reta(hw, msgbuf, reta, 0, 12);
+ if (err)
+ return err;
+
+ if (hw->mac.type >= ixgbe_mac_X550_vf) {
+ /* RETA[12..15] */
+ err = _ixgbevf_get_reta(hw, msgbuf, reta, 12, 4);
+ if (err)
+ return err;
+
+ } else {
+ /* RETA[12..23] */
+ err = _ixgbevf_get_reta(hw, msgbuf, reta, 12, 12);
+ if (err)
+ return err;
+
+ /* RETA[24..31] */
+ err = _ixgbevf_get_reta(hw, msgbuf, reta, 24, 8);
+ }
+
+ return err;
+}
+
/**
* ixgbevf_set_rar_vf - set device MAC address
* @hw: pointer to hardware structure
@@ -545,6 +636,7 @@ int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
/* do nothing if API doesn't support ixgbevf_get_queues */
switch (hw->api_version) {
case ixgbe_mbox_api_11:
+ case ixgbe_mbox_api_12:
break;
default:
return 0;
diff --git a/drivers/net/ethernet/intel/ixgbevf/vf.h b/drivers/net/ethernet/intel/ixgbevf/vf.h
index 6688250..89bc88e 100644
--- a/drivers/net/ethernet/intel/ixgbevf/vf.h
+++ b/drivers/net/ethernet/intel/ixgbevf/vf.h
@@ -210,4 +210,5 @@ void ixgbevf_rlpml_set_vf(struct ixgbe_hw *hw, u16 max_size);
int ixgbevf_negotiate_api_version(struct ixgbe_hw *hw, int api);
int ixgbevf_get_queues(struct ixgbe_hw *hw, unsigned int *num_tcs,
unsigned int *default_tc);
+int ixgbevf_get_reta(struct ixgbe_hw *hw, u32 *reta);
#endif /* __IXGBE_VF_H__ */
--
2.1.0
--
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