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i40e: Fix descriptor count manipulation 

Changing descriptor count via 'ethtool -G' is not persistent across resets.
When PF reset occurs, we roll back to the default value of vsi->num_desc,
which is used then in i40e_alloc_rings to set descriptor count. XDP does a
PF reset so when user has changed the descriptor count and load XDP
program, the default count will be back there.

To fix this:
  * introduce new VSI members - num_tx_desc and num_rx_desc in favour of
    num_desc
  * set them in i40e_set_ringparam to user's values
  * set them to default values in i40e_set_num_rings_in_vsi only when they
    don't have previous values

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Maciej Fijalkowski 2019-05-28 10:59:20 -07:00 committed by Jeff Kirsher
parent ee02865e4a
commit 15369ac3e3
4 changed files with 34 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/intel/i40e/i40e.h
View File

@ -775,7 +775,8 @@ struct i40e_vsi {
u16 alloc_queue_pairs; /* Allocated Tx/Rx queues */
u16 req_queue_pairs; /* User requested queue pairs */
u16 num_queue_pairs; /* Used tx and rx pairs */
u16 num_desc;
u16 num_tx_desc;
u16 num_rx_desc;
enum i40e_vsi_type type; /* VSI type, e.g., LAN, FCoE, etc */
s16 vf_id; /* Virtual function ID for SRIOV VSIs */

5
drivers/net/ethernet/intel/i40e/i40e_debugfs.c
View File

@ -333,8 +333,9 @@ static void i40e_dbg_dump_vsi_seid(struct i40e_pf *pf, int seid)
" seid = %d, id = %d, uplink_seid = %d\n",
vsi->seid, vsi->id, vsi->uplink_seid);
dev_info(&pf->pdev->dev,
" base_queue = %d, num_queue_pairs = %d, num_desc = %d\n",
vsi->base_queue, vsi->num_queue_pairs, vsi->num_desc);
" base_queue = %d, num_queue_pairs = %d, num_tx_desc = %d, num_rx_desc = %d\n",
vsi->base_queue, vsi->num_queue_pairs, vsi->num_tx_desc,
vsi->num_rx_desc);
dev_info(&pf->pdev->dev, " type = %i\n", vsi->type);
if (vsi->type == I40E_VSI_SRIOV)
dev_info(&pf->pdev->dev, " VF ID = %i\n", vsi->vf_id);

4
drivers/net/ethernet/intel/i40e/i40e_ethtool.c
View File

@ -1982,6 +1982,8 @@ static int i40e_set_ringparam(struct net_device *netdev,
if (i40e_enabled_xdp_vsi(vsi))
vsi->xdp_rings[i]->count = new_tx_count;
}
vsi->num_tx_desc = new_tx_count;
vsi->num_rx_desc = new_rx_count;
goto done;
}
@ -2118,6 +2120,8 @@ rx_unwind:
rx_rings = NULL;
}
vsi->num_tx_desc = new_tx_count;
vsi->num_rx_desc = new_rx_count;
i40e_up(vsi);
free_tx:

36
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -10078,8 +10078,12 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
switch (vsi->type) {
case I40E_VSI_MAIN:
vsi->alloc_queue_pairs = pf->num_lan_qps;
vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_tx_desc)
vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_rx_desc)
vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (pf->flags & I40E_FLAG_MSIX_ENABLED)
vsi->num_q_vectors = pf->num_lan_msix;
else
@ -10089,22 +10093,32 @@ static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
case I40E_VSI_FDIR:
vsi->alloc_queue_pairs = 1;
vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
I40E_REQ_DESCRIPTOR_MULTIPLE);
vsi->num_tx_desc = ALIGN(I40E_FDIR_RING_COUNT,
I40E_REQ_DESCRIPTOR_MULTIPLE);
vsi->num_rx_desc = ALIGN(I40E_FDIR_RING_COUNT,
I40E_REQ_DESCRIPTOR_MULTIPLE);
vsi->num_q_vectors = pf->num_fdsb_msix;
break;
case I40E_VSI_VMDQ2:
vsi->alloc_queue_pairs = pf->num_vmdq_qps;
vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_tx_desc)
vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_rx_desc)
vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
vsi->num_q_vectors = pf->num_vmdq_msix;
break;
case I40E_VSI_SRIOV:
vsi->alloc_queue_pairs = pf->num_vf_qps;
vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_tx_desc)
vsi->num_tx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
if (!vsi->num_rx_desc)
vsi->num_rx_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
I40E_REQ_DESCRIPTOR_MULTIPLE);
break;
default:
@ -10380,7 +10394,7 @@ static int i40e_alloc_rings(struct i40e_vsi *vsi)
ring->vsi = vsi;
ring->netdev = vsi->netdev;
ring->dev = &pf->pdev->dev;
ring->count = vsi->num_desc;
ring->count = vsi->num_tx_desc;
ring->size = 0;
ring->dcb_tc = 0;
if (vsi->back->hw_features & I40E_HW_WB_ON_ITR_CAPABLE)
@ -10397,7 +10411,7 @@ static int i40e_alloc_rings(struct i40e_vsi *vsi)
ring->vsi = vsi;
ring->netdev = NULL;
ring->dev = &pf->pdev->dev;
ring->count = vsi->num_desc;
ring->count = vsi->num_tx_desc;
ring->size = 0;
ring->dcb_tc = 0;
if (vsi->back->hw_features & I40E_HW_WB_ON_ITR_CAPABLE)
@ -10413,7 +10427,7 @@ setup_rx:
ring->vsi = vsi;
ring->netdev = vsi->netdev;
ring->dev = &pf->pdev->dev;
ring->count = vsi->num_desc;
ring->count = vsi->num_rx_desc;
ring->size = 0;
ring->dcb_tc = 0;
ring->itr_setting = pf->rx_itr_default;