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i40e: Add support for configuring VF RSS
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Add support for configuring RSS on behalf of the VFs. This removes the
burden of dealing with different hardware interfaces from the VF
drivers, allowing for better future compatibility.

Change-ID: Icea75d3f37241ee8e447be5779e5abb53ddf04c0
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Mitch Williams authored and Jeff Kirsher committed Apr 26, 2016
1 parent 577389a commit c4e1868
Showing 3 changed files with 217 additions and 12 deletions.
1 change: 1 addition & 0 deletions drivers/net/ethernet/intel/i40e/i40e.h
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Original file line number Diff line number Diff line change
@@ -202,6 +202,7 @@ struct i40e_lump_tracking {

#define I40E_HKEY_ARRAY_SIZE ((I40E_PFQF_HKEY_MAX_INDEX + 1) * 4)
#define I40E_HLUT_ARRAY_SIZE ((I40E_PFQF_HLUT_MAX_INDEX + 1) * 4)
#define I40E_VF_HLUT_ARRAY_SIZE ((I40E_VFQF_HLUT1_MAX_INDEX + 1) * 4)

enum i40e_fd_stat_idx {
I40E_FD_STAT_ATR,
35 changes: 28 additions & 7 deletions drivers/net/ethernet/intel/i40e/i40e_main.c
View file
Original file line number Diff line number Diff line change
@@ -8082,24 +8082,45 @@ static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
{
struct i40e_pf *pf = vsi->back;
struct i40e_hw *hw = &pf->hw;
u16 vf_id = vsi->vf_id;
u8 i;

/* Fill out hash function seed */
if (seed) {
u32 *seed_dw = (u32 *)seed;

for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
i40e_write_rx_ctl(hw, I40E_PFQF_HKEY(i), seed_dw[i]);
if (vsi->type == I40E_VSI_MAIN) {
for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
i40e_write_rx_ctl(hw, I40E_PFQF_HKEY(i),
seed_dw[i]);
} else if (vsi->type == I40E_VSI_SRIOV) {
for (i = 0; i <= I40E_VFQF_HKEY1_MAX_INDEX; i++)
i40e_write_rx_ctl(hw,
I40E_VFQF_HKEY1(i, vf_id),
seed_dw[i]);
} else {
dev_err(&pf->pdev->dev, "Cannot set RSS seed - invalid VSI type\n");
}
}

if (lut) {
u32 *lut_dw = (u32 *)lut;

if (lut_size != I40E_HLUT_ARRAY_SIZE)
return -EINVAL;

for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
if (vsi->type == I40E_VSI_MAIN) {
if (lut_size != I40E_HLUT_ARRAY_SIZE)
return -EINVAL;
for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
} else if (vsi->type == I40E_VSI_SRIOV) {
if (lut_size != I40E_VF_HLUT_ARRAY_SIZE)
return -EINVAL;
for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
i40e_write_rx_ctl(hw,
I40E_VFQF_HLUT1(i, vf_id),
lut_dw[i]);
} else {
dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
}
}
i40e_flush(hw);

193 changes: 188 additions & 5 deletions drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
View file
Original file line number Diff line number Diff line change
@@ -1348,12 +1348,16 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
set_bit(I40E_VF_STAT_IWARPENA, &vf->vf_states);
}

if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
if (vf->driver_caps & I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ)
vfres->vf_offload_flags |=
I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ;
if (vf->driver_caps & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
vfres->vf_offload_flags |= I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF;
} else {
vfres->vf_offload_flags |= I40E_VIRTCHNL_VF_OFFLOAD_RSS_REG;
if ((pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) &&
(vf->driver_caps & I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ))
vfres->vf_offload_flags |=
I40E_VIRTCHNL_VF_OFFLOAD_RSS_AQ;
else
vfres->vf_offload_flags |=
I40E_VIRTCHNL_VF_OFFLOAD_RSS_REG;
}

if (pf->flags & I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE) {
@@ -1382,6 +1386,9 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
vfres->num_vsis = num_vsis;
vfres->num_queue_pairs = vf->num_queue_pairs;
vfres->max_vectors = pf->hw.func_caps.num_msix_vectors_vf;
vfres->rss_key_size = I40E_HKEY_ARRAY_SIZE;
vfres->rss_lut_size = I40E_VF_HLUT_ARRAY_SIZE;

if (vf->lan_vsi_idx) {
vfres->vsi_res[0].vsi_id = vf->lan_vsi_id;
vfres->vsi_res[0].vsi_type = I40E_VSI_SRIOV;
@@ -2041,6 +2048,139 @@ static int i40e_vc_iwarp_qvmap_msg(struct i40e_vf *vf, u8 *msg, u16 msglen,
aq_ret);
}

/**
* i40e_vc_config_rss_key
* @vf: pointer to the VF info
* @msg: pointer to the msg buffer
* @msglen: msg length
*
* Configure the VF's RSS key
**/
static int i40e_vc_config_rss_key(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
struct i40e_virtchnl_rss_key *vrk =
(struct i40e_virtchnl_rss_key *)msg;
struct i40e_pf *pf = vf->pf;
struct i40e_vsi *vsi = NULL;
u16 vsi_id = vrk->vsi_id;
i40e_status aq_ret = 0;

if (!test_bit(I40E_VF_STAT_ACTIVE, &vf->vf_states) ||
!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps) ||
!i40e_vc_isvalid_vsi_id(vf, vsi_id) ||
(vrk->key_len != I40E_HKEY_ARRAY_SIZE)) {
aq_ret = I40E_ERR_PARAM;
goto err;
}

vsi = pf->vsi[vf->lan_vsi_idx];
aq_ret = i40e_config_rss(vsi, vrk->key, NULL, 0);
err:
/* send the response to the VF */
return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_CONFIG_RSS_KEY,
aq_ret);
}

/**
* i40e_vc_config_rss_lut
* @vf: pointer to the VF info
* @msg: pointer to the msg buffer
* @msglen: msg length
*
* Configure the VF's RSS LUT
**/
static int i40e_vc_config_rss_lut(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
struct i40e_virtchnl_rss_lut *vrl =
(struct i40e_virtchnl_rss_lut *)msg;
struct i40e_pf *pf = vf->pf;
struct i40e_vsi *vsi = NULL;
u16 vsi_id = vrl->vsi_id;
i40e_status aq_ret = 0;

if (!test_bit(I40E_VF_STAT_ACTIVE, &vf->vf_states) ||
!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps) ||
!i40e_vc_isvalid_vsi_id(vf, vsi_id) ||
(vrl->lut_entries != I40E_VF_HLUT_ARRAY_SIZE)) {
aq_ret = I40E_ERR_PARAM;
goto err;
}

vsi = pf->vsi[vf->lan_vsi_idx];
aq_ret = i40e_config_rss(vsi, NULL, vrl->lut, I40E_VF_HLUT_ARRAY_SIZE);
/* send the response to the VF */
err:
return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_CONFIG_RSS_LUT,
aq_ret);
}

/**
* i40e_vc_get_rss_hena
* @vf: pointer to the VF info
* @msg: pointer to the msg buffer
* @msglen: msg length
*
* Return the RSS HENA bits allowed by the hardware
**/
static int i40e_vc_get_rss_hena(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
struct i40e_virtchnl_rss_hena *vrh = NULL;
struct i40e_pf *pf = vf->pf;
i40e_status aq_ret = 0;
int len = 0;

if (!test_bit(I40E_VF_STAT_ACTIVE, &vf->vf_states) ||
!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
aq_ret = I40E_ERR_PARAM;
goto err;
}
len = sizeof(struct i40e_virtchnl_rss_hena);

vrh = kzalloc(len, GFP_KERNEL);
if (!vrh) {
aq_ret = I40E_ERR_NO_MEMORY;
len = 0;
goto err;
}
vrh->hena = i40e_pf_get_default_rss_hena(pf);
err:
/* send the response back to the VF */
aq_ret = i40e_vc_send_msg_to_vf(vf, I40E_VIRTCHNL_OP_GET_RSS_HENA_CAPS,
aq_ret, (u8 *)vrh, len);
return aq_ret;
}

/**
* i40e_vc_set_rss_hena
* @vf: pointer to the VF info
* @msg: pointer to the msg buffer
* @msglen: msg length
*
* Set the RSS HENA bits for the VF
**/
static int i40e_vc_set_rss_hena(struct i40e_vf *vf, u8 *msg, u16 msglen)
{
struct i40e_virtchnl_rss_hena *vrh =
(struct i40e_virtchnl_rss_hena *)msg;
struct i40e_pf *pf = vf->pf;
struct i40e_hw *hw = &pf->hw;
i40e_status aq_ret = 0;

if (!test_bit(I40E_VF_STAT_ACTIVE, &vf->vf_states) ||
!test_bit(I40E_VIRTCHNL_VF_CAP_PRIVILEGE, &vf->vf_caps)) {
aq_ret = I40E_ERR_PARAM;
goto err;
}
i40e_write_rx_ctl(hw, I40E_VFQF_HENA1(0, vf->vf_id), (u32)vrh->hena);
i40e_write_rx_ctl(hw, I40E_VFQF_HENA1(1, vf->vf_id),
(u32)(vrh->hena >> 32));

/* send the response to the VF */
err:
return i40e_vc_send_resp_to_vf(vf, I40E_VIRTCHNL_OP_SET_RSS_HENA,
aq_ret);
}

/**
* i40e_vc_validate_vf_msg
* @vf: pointer to the VF info
@@ -2162,6 +2302,36 @@ static int i40e_vc_validate_vf_msg(struct i40e_vf *vf, u32 v_opcode,
sizeof(struct i40e_virtchnl_iwarp_qv_info));
}
break;
case I40E_VIRTCHNL_OP_CONFIG_RSS_KEY:
valid_len = sizeof(struct i40e_virtchnl_rss_key);
if (msglen >= valid_len) {
struct i40e_virtchnl_rss_key *vrk =
(struct i40e_virtchnl_rss_key *)msg;
if (vrk->key_len != I40E_HKEY_ARRAY_SIZE) {
err_msg_format = true;
break;
}
valid_len += vrk->key_len - 1;
}
break;
case I40E_VIRTCHNL_OP_CONFIG_RSS_LUT:
valid_len = sizeof(struct i40e_virtchnl_rss_lut);
if (msglen >= valid_len) {
struct i40e_virtchnl_rss_lut *vrl =
(struct i40e_virtchnl_rss_lut *)msg;
if (vrl->lut_entries != I40E_VF_HLUT_ARRAY_SIZE) {
err_msg_format = true;
break;
}
valid_len += vrl->lut_entries - 1;
}
break;
case I40E_VIRTCHNL_OP_GET_RSS_HENA_CAPS:
valid_len = 0;
break;
case I40E_VIRTCHNL_OP_SET_RSS_HENA:
valid_len = sizeof(struct i40e_virtchnl_rss_hena);
break;
/* These are always errors coming from the VF. */
case I40E_VIRTCHNL_OP_EVENT:
case I40E_VIRTCHNL_OP_UNKNOWN:
@@ -2260,6 +2430,19 @@ int i40e_vc_process_vf_msg(struct i40e_pf *pf, u16 vf_id, u32 v_opcode,
case I40E_VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP:
ret = i40e_vc_iwarp_qvmap_msg(vf, msg, msglen, false);
break;
case I40E_VIRTCHNL_OP_CONFIG_RSS_KEY:
ret = i40e_vc_config_rss_key(vf, msg, msglen);
break;
case I40E_VIRTCHNL_OP_CONFIG_RSS_LUT:
ret = i40e_vc_config_rss_lut(vf, msg, msglen);
break;
case I40E_VIRTCHNL_OP_GET_RSS_HENA_CAPS:
ret = i40e_vc_get_rss_hena(vf, msg, msglen);
break;
case I40E_VIRTCHNL_OP_SET_RSS_HENA:
ret = i40e_vc_set_rss_hena(vf, msg, msglen);
break;

case I40E_VIRTCHNL_OP_UNKNOWN:
default:
dev_err(&pf->pdev->dev, "Unsupported opcode %d from VF %d\n",

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