From: Justin Bronder jsbronder@cold-front.org
[ Upstream commit aa6908ca3bd1e713fd6cd8d7193a008f060bf7d9 ]
In Tables 8-12 and 8-22 in the X710/XXV710/XL710 datasheet, the QLEN description states that the maximum size of the descriptor queue is 8k minus 32, or 8160.
Signed-off-by: Justin Bronder jsbronder@cold-front.org Reviewed-by: Jacob Keller jacob.e.keller@intel.com Tested-by: Pucha Himasekhar Reddy himasekharx.reddy.pucha@intel.com (A Contingent worker at Intel) Signed-off-by: Tony Nguyen anthony.l.nguyen@intel.com Link: https://lore.kernel.org/r/20231113231047.548659-2-anthony.l.nguyen@intel.com Signed-off-by: Jakub Kicinski kuba@kernel.org Stable-dep-of: 55d225670def ("i40e: add validation for ring_len param") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/intel/i40e/i40e.h | 1 + .../net/ethernet/intel/i40e/i40e_ethtool.c | 25 ++++++++++++++----- 2 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/intel/i40e/i40e.h b/drivers/net/ethernet/intel/i40e/i40e.h index edb5e408c980f..1622573ffe37a 100644 --- a/drivers/net/ethernet/intel/i40e/i40e.h +++ b/drivers/net/ethernet/intel/i40e/i40e.h @@ -48,6 +48,7 @@ #define I40E_MAX_VEB 16
#define I40E_MAX_NUM_DESCRIPTORS 4096 +#define I40E_MAX_NUM_DESCRIPTORS_XL710 8160 #define I40E_MAX_CSR_SPACE (4 * 1024 * 1024 - 64 * 1024) #define I40E_DEFAULT_NUM_DESCRIPTORS 512 #define I40E_REQ_DESCRIPTOR_MULTIPLE 32 diff --git a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c index 95a6f8689b6f1..4c42c8b0e8936 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_ethtool.c +++ b/drivers/net/ethernet/intel/i40e/i40e_ethtool.c @@ -1914,6 +1914,18 @@ static void i40e_get_drvinfo(struct net_device *netdev, drvinfo->n_priv_flags += I40E_GL_PRIV_FLAGS_STR_LEN; }
+static u32 i40e_get_max_num_descriptors(struct i40e_pf *pf) +{ + struct i40e_hw *hw = &pf->hw; + + switch (hw->mac.type) { + case I40E_MAC_XL710: + return I40E_MAX_NUM_DESCRIPTORS_XL710; + default: + return I40E_MAX_NUM_DESCRIPTORS; + } +} + static void i40e_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) { @@ -1921,8 +1933,8 @@ static void i40e_get_ringparam(struct net_device *netdev, struct i40e_pf *pf = np->vsi->back; struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
- ring->rx_max_pending = I40E_MAX_NUM_DESCRIPTORS; - ring->tx_max_pending = I40E_MAX_NUM_DESCRIPTORS; + ring->rx_max_pending = i40e_get_max_num_descriptors(pf); + ring->tx_max_pending = i40e_get_max_num_descriptors(pf); ring->rx_mini_max_pending = 0; ring->rx_jumbo_max_pending = 0; ring->rx_pending = vsi->rx_rings[0]->count; @@ -1945,12 +1957,12 @@ static bool i40e_active_tx_ring_index(struct i40e_vsi *vsi, u16 index) static int i40e_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring) { + u32 new_rx_count, new_tx_count, max_num_descriptors; struct i40e_ring *tx_rings = NULL, *rx_rings = NULL; struct i40e_netdev_priv *np = netdev_priv(netdev); struct i40e_hw *hw = &np->vsi->back->hw; struct i40e_vsi *vsi = np->vsi; struct i40e_pf *pf = vsi->back; - u32 new_rx_count, new_tx_count; u16 tx_alloc_queue_pairs; int timeout = 50; int i, err = 0; @@ -1958,14 +1970,15 @@ static int i40e_set_ringparam(struct net_device *netdev, if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending)) return -EINVAL;
- if (ring->tx_pending > I40E_MAX_NUM_DESCRIPTORS || + max_num_descriptors = i40e_get_max_num_descriptors(pf); + if (ring->tx_pending > max_num_descriptors || ring->tx_pending < I40E_MIN_NUM_DESCRIPTORS || - ring->rx_pending > I40E_MAX_NUM_DESCRIPTORS || + ring->rx_pending > max_num_descriptors || ring->rx_pending < I40E_MIN_NUM_DESCRIPTORS) { netdev_info(netdev, "Descriptors requested (Tx: %d / Rx: %d) out of range [%d-%d]\n", ring->tx_pending, ring->rx_pending, - I40E_MIN_NUM_DESCRIPTORS, I40E_MAX_NUM_DESCRIPTORS); + I40E_MIN_NUM_DESCRIPTORS, max_num_descriptors); return -EINVAL; }