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Message-Id: <1427202346-12502-4-git-send-email-vladz@cloudius-systems.com>
Date: Tue, 24 Mar 2015 15:05:42 +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 v7 3/7] ixgbe: Add a RETA query command to VF-PF channel API
82599 and x540 VFs and PF share the same RSS redirection table (RETA). Therefore we
just return it for all VFs. x550 on the other hand provides a separate redirection
table for each VF (there is a per-pool RETA table).
For 82599 and x540 RETA table is an array of 32 registers (128 bytes) and the maximum number of
registers that may be delivered in a single VF-PF channel command is 15. Therefore
we will deliver the whole table in 3 steps: 12, 12 and 8 registers in each
step correspondingly.
For x550 VFs RETA is a 64 byte array, so we may deliver it in two steps: 12 and 4 registers
correspondingly.
Thus this patch does the following:
- Adds a new API version (to specify a new commands set).
- Adds the IXGBE_VF_GET_RETA command to the VF-PF commands set.
Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com>
---
New in v5:
- Use the newly added netdev op to allow/prevent the RETA query on a per-VF basis.
New in v4:
- Deleted an empty line in ixgbe_get_vf_reta() switch-case.
New in v3:
- Pass the number of dwords and offset in RETA in the IXGBE_VF_GET_RETA request message.
This allows to reduce the added command set to a single command.
- Added a support for all devices supported by the ixgbe driver that have
SR-IOV functions support: 82599, x540 and x550. The original code supported
only 82599 and x540.
- Added the masking of the RETA entries according to the PSRTYPE[n].RQPL
value.
New in v1 (compared to RFC):
- Use "if-else" statement instead of a "switch-case" for a single option case
(in ixgbe_get_vf_reta()).
---
drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h | 8 ++++
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 65 ++++++++++++++++++++++++++
2 files changed, 73 insertions(+)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h
index a5cb755..f9b5eae 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_mbx.h
@@ -73,6 +73,7 @@ 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 */
};
@@ -97,6 +98,13 @@ 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/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index 4d67677..301bb1b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -437,6 +437,7 @@ static s32 ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
#endif /* CONFIG_FCOE */
switch (adapter->vfinfo[vf].vf_api) {
case ixgbe_mbox_api_11:
+ case ixgbe_mbox_api_12:
/*
* Version 1.1 supports jumbo frames on VFs if PF has
* jumbo frames enabled which means legacy VFs are
@@ -904,6 +905,7 @@ static int ixgbe_negotiate_vf_api(struct ixgbe_adapter *adapter,
switch (api) {
case ixgbe_mbox_api_10:
case ixgbe_mbox_api_11:
+ case ixgbe_mbox_api_12:
adapter->vfinfo[vf].vf_api = api;
return 0;
default:
@@ -927,6 +929,7 @@ static int ixgbe_get_vf_queues(struct ixgbe_adapter *adapter,
switch (adapter->vfinfo[vf].vf_api) {
case ixgbe_mbox_api_20:
case ixgbe_mbox_api_11:
+ case ixgbe_mbox_api_12:
break;
default:
return -1;
@@ -954,6 +957,65 @@ static int ixgbe_get_vf_queues(struct ixgbe_adapter *adapter,
return 0;
}
+static int ixgbe_get_vf_reta(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
+{
+ struct ixgbe_hw *hw = &adapter->hw;
+ int i, j;
+ u32 *reta = &msgbuf[1];
+ u32 mask = 0;
+ u32 psrtype;
+ u32 reta_offset_dw = msgbuf[IXGBE_VF_RETA_OFFSET];
+ u32 dwords = msgbuf[IXGBE_VF_RETA_SZ];
+
+ /* verify the PF is supporting the correct API */
+ if (!adapter->vfinfo[vf].rss_query_enabled ||
+ (adapter->vfinfo[vf].vf_api != ixgbe_mbox_api_12))
+ return -EPERM;
+
+ psrtype = IXGBE_READ_REG(hw, IXGBE_PSRTYPE(vf));
+
+ /* The redirection table is composed as follows:
+ * 82598: 128 (8 bit wide) entries containing pair of 4 bit RSS indices
+ * 82599/X540: 128 (8 bit wide) entries containing 4 bit RSS index X550:
+ * 512 (8 bit wide) entries containing 6 bit RSS index
+ *
+ * PSRTYPE[n].RQPL defines if 0, 1 or 2 bits from the redirection table
+ * value should be used.
+ */
+
+ if ((psrtype & (1 << 29)) == (1 << 29))
+ mask = 0x01010101;
+ else if ((psrtype & (2 << 29)) == (2 << 29))
+ mask = 0x03030303;
+ else
+ mask = 0;
+
+ switch (hw->mac.type) {
+ case ixgbe_mac_82599EB:
+ case ixgbe_mac_X540:
+ /* Read the appropriate portion of RETA */
+ for (i = 0; i < dwords; i++)
+ reta[i] = IXGBE_READ_REG(hw,
+ IXGBE_RETA(i + reta_offset_dw));
+ break;
+ case ixgbe_mac_X550:
+ case ixgbe_mac_X550EM_x:
+ /* X550 has a per-VF RETA */
+ for (i = 0, j = reta_offset_dw; i < dwords; i++, j++)
+ reta[i] = IXGBE_READ_REG(hw,
+ IXGBE_PFVFRETA(j, vf));
+ break;
+ default:
+ return -1;
+ }
+
+ /* Mask the relevant bits */
+ for (i = 0; i < dwords; i++)
+ reta[i] &= mask;
+
+ return 0;
+}
+
static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
{
u32 mbx_size = IXGBE_VFMAILBOX_SIZE;
@@ -1010,6 +1072,9 @@ static int ixgbe_rcv_msg_from_vf(struct ixgbe_adapter *adapter, u32 vf)
case IXGBE_VF_GET_QUEUES:
retval = ixgbe_get_vf_queues(adapter, msgbuf, vf);
break;
+ case IXGBE_VF_GET_RETA:
+ retval = ixgbe_get_vf_reta(adapter, msgbuf, vf);
+ break;
default:
e_err(drv, "Unhandled Msg %8.8x\n", msgbuf[0]);
retval = IXGBE_ERR_MBX;
--
2.1.0
--
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