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Date: Tue, 26 Apr 2016 13:55:41 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: Kiran Patil <kiran.patil@...el.com>, netdev@...r.kernel.org,
nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 08/15] i40e: Allow user to change input set mask for flow director
From: Kiran Patil <kiran.patil@...el.com>
This patch implements feature, which allows user to change
input set mask for flow director using side-band channel.
This patch adds definition of FLOW_TYPE_MASK into the header file.
With this patch, user can now specify less than 4 tuple(src ip, dsp ip,
src port, dst port) for flow type TCP4/UDP4.
Change-Id: I90052508f8c172c0da5a4b78b949704b4a59ea78
Signed-off-by: Kiran Patil <kiran.patil@...el.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ethernet/intel/i40e/i40e.h | 6 ++
drivers/net/ethernet/intel/i40e/i40e_ethtool.c | 116 +++++++++++++++++++++++++
drivers/net/ethernet/intel/i40e/i40e_txrx.c | 2 +-
3 files changed, 123 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h
index e312adf..c2ac73d 100644
--- a/drivers/net/ethernet/intel/i40e/i40e.h
+++ b/drivers/net/ethernet/intel/i40e/i40e.h
@@ -240,6 +240,12 @@ struct i40e_fdir_filter {
u32 fd_id;
};
+#ifndef FLOW_TYPE_MASK
+#define FLOW_TYPE_MASK 0xFF
+#else
+#error FLOW_TYPE_MASK already defined elsewhere
+#endif
+
#define I40E_ETH_P_LLDP 0x88cc
#define I40E_DCB_PRIO_TYPE_STRICT 0
diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
index 8e56c43..ada448b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c
@@ -2488,6 +2488,116 @@ static int i40e_del_fdir_entry(struct i40e_vsi *vsi,
}
/**
+ * i40e_handle_input_set - Detect and handle input set changes
+ * @vsi: pointer to the targeted VSI
+ * @fsp: pointer to RX flow classification spec
+ *
+ * Reads register, detect change in input set based on existing register
+ * value and what user has passed. Update input set mask register if needed.
+ **/
+static int i40e_handle_input_set(struct i40e_vsi *vsi,
+ struct ethtool_rx_flow_spec *fsp)
+{
+ bool inset_mask_change = false;
+ struct i40e_pf *pf;
+ u64 val;
+ u8 idx;
+
+ if (unlikely(!vsi))
+ return -EINVAL;
+
+ pf = vsi->back;
+ switch (fsp->flow_type & FLOW_TYPE_MASK) {
+ case TCP_V4_FLOW:
+ idx = I40E_FILTER_PCTYPE_NONF_IPV4_TCP;
+ break;
+ case UDP_V4_FLOW:
+ idx = I40E_FILTER_PCTYPE_NONF_IPV4_UDP;
+ break;
+ default:
+ /* for all other flow types */
+ return 0;
+ }
+
+ val = ((u64)i40e_read_rx_ctl(&pf->hw,
+ I40E_PRTQF_FD_INSET(idx, 1)) << 32) |
+ (u64)i40e_read_rx_ctl(&pf->hw,
+ I40E_PRTQF_FD_INSET(idx, 0));
+
+ /* Default input set (TCP/UDP/SCTP) contains following
+ * fields: srcip + dest ip + src port + dest port
+ * For SCTP, there is one extra field, "verification tag"
+ */
+ if (val & I40E_L3_SRC_MASK) {
+ if (!fsp->h_u.tcp_ip4_spec.ip4src) {
+ val &= ~I40E_L3_SRC_MASK;
+ inset_mask_change = true;
+ }
+ } else {
+ if (fsp->h_u.tcp_ip4_spec.ip4src) {
+ val |= I40E_L3_SRC_MASK;
+ inset_mask_change = true;
+ }
+ }
+ if (val & I40E_L3_DST_MASK) {
+ if (!fsp->h_u.tcp_ip4_spec.ip4dst) {
+ val &= ~I40E_L3_DST_MASK;
+ inset_mask_change = true;
+ }
+ } else {
+ if (fsp->h_u.tcp_ip4_spec.ip4dst) {
+ val |= I40E_L3_DST_MASK;
+ inset_mask_change = true;
+ }
+ }
+ if (val & I40E_L4_SRC_MASK) {
+ if (!fsp->h_u.tcp_ip4_spec.psrc) {
+ val &= ~I40E_L4_SRC_MASK;
+ inset_mask_change = true;
+ }
+ } else {
+ if (fsp->h_u.tcp_ip4_spec.psrc) {
+ val |= I40E_L4_SRC_MASK;
+ inset_mask_change = true;
+ }
+ }
+ if (val & I40E_L4_DST_MASK) {
+ if (!fsp->h_u.tcp_ip4_spec.pdst) {
+ val &= ~I40E_L4_DST_MASK;
+ inset_mask_change = true;
+ }
+ } else {
+ if (fsp->h_u.tcp_ip4_spec.pdst) {
+ val |= I40E_L4_DST_MASK;
+ inset_mask_change = true;
+ }
+ }
+
+ if (inset_mask_change) {
+ if (pf->flags & I40E_FLAG_MFP_ENABLED) {
+ netif_err(pf, drv, vsi->netdev, "Change of input set is not supported when MFP mode is enabled\n");
+ return -EOPNOTSUPP;
+ }
+ if (pf->fdir_pf_active_filters) {
+ netif_err(pf, drv, vsi->netdev, "Change of input set is not supported when there are existing filters. Please delete them and re-try\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (I40E_DEBUG_FD & pf->hw.debug_mask)
+ netif_info(pf, drv, vsi->netdev, "FD_INSET mask is changing to 0x%016llx\n",
+ val);
+ /* Update input mask register since input set mask changed */
+ i40e_write_rx_ctl(&pf->hw, I40E_PRTQF_FD_INSET(idx, 1),
+ (u32)(val >> 32));
+ i40e_write_rx_ctl(&pf->hw, I40E_PRTQF_FD_INSET(idx, 0),
+ (u32)val);
+ netif_info(pf, drv, vsi->netdev, "Input set mask change has been successful. Please note that this and all other interfaces on (related and derived from) this part are affected as well.\n");
+ }
+
+ return 0;
+}
+
+/**
* i40e_add_fdir_ethtool - Add/Remove Flow Director filters
* @vsi: pointer to the targeted VSI
* @cmd: command to get or set RX flow classification rules
@@ -2562,6 +2672,12 @@ static int i40e_add_fdir_ethtool(struct i40e_vsi *vsi,
input->dst_ip[0] = fsp->h_u.tcp_ip4_spec.ip4src;
input->src_ip[0] = fsp->h_u.tcp_ip4_spec.ip4dst;
+ ret = i40e_handle_input_set(vsi, fsp);
+ if (ret) {
+ netif_err(pf, drv, vsi->netdev, "Unable to handle change in input set mask\n");
+ goto free_input;
+ }
+
if (ntohl(fsp->m_ext.data[1])) {
vf_id = ntohl(fsp->h_ext.data[1]);
if (vf_id >= pf->num_alloc_vfs) {
diff --git a/drivers/net/ethernet/intel/i40e/i40e_txrx.c b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
index 6e44cf1..57af5f6 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_txrx.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_txrx.c
@@ -412,7 +412,7 @@ int i40e_add_del_fdir(struct i40e_vsi *vsi,
struct i40e_pf *pf = vsi->back;
int ret;
- switch (input->flow_type & ~FLOW_EXT) {
+ switch (input->flow_type & FLOW_TYPE_MASK) {
case TCP_V4_FLOW:
ret = i40e_add_del_fdir_tcpv4(vsi, input, add);
break;
--
2.5.5
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