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From 544f90bf8327f6898b8e3cfd648b101b48d58189 Mon Sep 17 00:00:00 2001
From: Igor Russkikh <irusskik@redhat.com>
Date: Fri, 6 Nov 2020 18:37:57 -0500
Subject: [PATCH 100/139] [netdrv] net: atlantic: automatically downgrade the
number of queues if necessary
Message-id: <1604687916-15087-101-git-send-email-irusskik@redhat.com>
Patchwork-id: 338531
Patchwork-instance: patchwork
O-Subject: [RHEL8.4 BZ 1857861 100/139] net: atlantic: automatically downgrade the number of queues if necessary
Bugzilla: 1857861
RH-Acked-by: David Arcari <darcari@redhat.com>
RH-Acked-by: John Linville <linville@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
Bugzilla: http://bugzilla.redhat.com/1857861
commit 14ef766b13822001087d468aa41f22caa2a42022
Author: Mark Starovoytov <mstarovoitov@marvell.com>
Date: Fri May 22 11:19:44 2020 +0300
net: atlantic: automatically downgrade the number of queues if necessary
This patch adds support for automatic queue number downgrade.
On A2: this is a must have, because only TC0/TC1 support more than 4Q.
Other TCs support 4Qs maximum.
Thus, on A2 we must downgrade the number of queues per TC to 4, if more
than 2 TCs are requested.
On A1: this allows using 8TCs even on systems with cpu count >= 8, when
we have 8 queues by default.
We will just automatically switch to 8TCx4Q mode in this case.
Signed-off-by: Mark Starovoytov <mstarovoitov@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Igor Russkikh <irusskik@redhat.com>
Cc: David Arcari <darcari@redhat.com>
Cc: Igor Russkikh <irusskik@redhat.com>
Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
.../net/ethernet/aquantia/atlantic/aq_ethtool.c | 15 ++---
drivers/net/ethernet/aquantia/atlantic/aq_main.c | 5 +-
drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 78 +++++++++++++++-------
drivers/net/ethernet/aquantia/atlantic/aq_nic.h | 1 +
4 files changed, 63 insertions(+), 36 deletions(-)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
index ff1e254f7471..59e7b326cfda 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
@@ -664,8 +664,6 @@ static int aq_set_ringparam(struct net_device *ndev,
dev_close(ndev);
}
- aq_nic_free_vectors(aq_nic);
-
cfg->rxds = max(ring->rx_pending, hw_caps->rxds_min);
cfg->rxds = min(cfg->rxds, hw_caps->rxds_max);
cfg->rxds = ALIGN(cfg->rxds, AQ_HW_RXD_MULTIPLE);
@@ -674,15 +672,10 @@ static int aq_set_ringparam(struct net_device *ndev,
cfg->txds = min(cfg->txds, hw_caps->txds_max);
cfg->txds = ALIGN(cfg->txds, AQ_HW_TXD_MULTIPLE);
- for (aq_nic->aq_vecs = 0; aq_nic->aq_vecs < cfg->vecs;
- aq_nic->aq_vecs++) {
- aq_nic->aq_vec[aq_nic->aq_vecs] =
- aq_vec_alloc(aq_nic, aq_nic->aq_vecs, cfg);
- if (unlikely(!aq_nic->aq_vec[aq_nic->aq_vecs])) {
- err = -ENOMEM;
- goto err_exit;
- }
- }
+ err = aq_nic_realloc_vectors(aq_nic);
+ if (err)
+ goto err_exit;
+
if (ndev_running)
err = dev_open(ndev, NULL);
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
index d8817047f4ef..57a116ccad55 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
@@ -337,9 +337,12 @@ static int aq_validate_mqprio_opt(struct aq_nic_s *self,
const unsigned int num_tc)
{
const bool has_min_rate = !!(mqprio->flags & TC_MQPRIO_F_MIN_RATE);
+ struct aq_nic_cfg_s *aq_nic_cfg = aq_nic_get_cfg(self);
+ const unsigned int tcs_max = min_t(u8, aq_nic_cfg->aq_hw_caps->tcs_max,
+ AQ_CFG_TCS_MAX);
int i;
- if (num_tc > aq_hw_num_tcs(self->aq_hw)) {
+ if (num_tc > tcs_max) {
netdev_err(self->ndev, "Too many TCs requested\n");
return -EOPNOTSUPP;
}
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 121e8d8875c8..4ed370777411 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -64,6 +64,33 @@ static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
rss_params->indirection_table[i] = i & (num_rss_queues - 1);
}
+/* Recalculate the number of vectors */
+static void aq_nic_cfg_update_num_vecs(struct aq_nic_s *self)
+{
+ struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
+
+ cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
+ cfg->vecs = min(cfg->vecs, num_online_cpus());
+ if (self->irqvecs > AQ_HW_SERVICE_IRQS)
+ cfg->vecs = min(cfg->vecs, self->irqvecs - AQ_HW_SERVICE_IRQS);
+ /* cfg->vecs should be power of 2 for RSS */
+ cfg->vecs = rounddown_pow_of_two(cfg->vecs);
+
+ if (ATL_HW_IS_CHIP_FEATURE(self->aq_hw, ANTIGUA)) {
+ if (cfg->tcs > 2)
+ cfg->vecs = min(cfg->vecs, 4U);
+ }
+
+ if (cfg->vecs <= 4)
+ cfg->tc_mode = AQ_TC_MODE_8TCS;
+ else
+ cfg->tc_mode = AQ_TC_MODE_4TCS;
+
+ /*rss rings */
+ cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
+ aq_nic_rss_init(self, cfg->num_rss_queues);
+}
+
/* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
void aq_nic_cfg_start(struct aq_nic_s *self)
{
@@ -80,7 +107,6 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
cfg->rxpageorder = AQ_CFG_RX_PAGEORDER;
cfg->is_rss = AQ_CFG_IS_RSS_DEF;
- cfg->num_rss_queues = AQ_CFG_NUM_RSS_QUEUES_DEF;
cfg->aq_rss.base_cpu_number = AQ_CFG_RSS_BASE_CPU_NUM_DEF;
cfg->fc.req = AQ_CFG_FC_MODE;
cfg->wol = AQ_CFG_WOL_MODES;
@@ -96,24 +122,7 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
cfg->rxds = min(cfg->aq_hw_caps->rxds_max, AQ_CFG_RXDS_DEF);
cfg->txds = min(cfg->aq_hw_caps->txds_max, AQ_CFG_TXDS_DEF);
- /*rss rings */
- cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
- cfg->vecs = min(cfg->vecs, num_online_cpus());
- if (self->irqvecs > AQ_HW_SERVICE_IRQS)
- cfg->vecs = min(cfg->vecs, self->irqvecs - AQ_HW_SERVICE_IRQS);
- /* cfg->vecs should be power of 2 for RSS */
- if (cfg->vecs >= 8U)
- cfg->vecs = 8U;
- else if (cfg->vecs >= 4U)
- cfg->vecs = 4U;
- else if (cfg->vecs >= 2U)
- cfg->vecs = 2U;
- else
- cfg->vecs = 1U;
-
- cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
-
- aq_nic_rss_init(self, cfg->num_rss_queues);
+ aq_nic_cfg_update_num_vecs(self);
cfg->irq_type = aq_pci_func_get_irq_type(self);
@@ -124,11 +133,6 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
cfg->vecs = 1U;
}
- if (cfg->vecs <= 4)
- cfg->tc_mode = AQ_TC_MODE_8TCS;
- else
- cfg->tc_mode = AQ_TC_MODE_4TCS;
-
/* Check if we have enough vectors allocated for
* link status IRQ. If no - we'll know link state from
* slower service task.
@@ -1203,6 +1207,22 @@ void aq_nic_free_vectors(struct aq_nic_s *self)
err_exit:;
}
+int aq_nic_realloc_vectors(struct aq_nic_s *self)
+{
+ struct aq_nic_cfg_s *cfg = aq_nic_get_cfg(self);
+
+ aq_nic_free_vectors(self);
+
+ for (self->aq_vecs = 0; self->aq_vecs < cfg->vecs; self->aq_vecs++) {
+ self->aq_vec[self->aq_vecs] = aq_vec_alloc(self, self->aq_vecs,
+ cfg);
+ if (unlikely(!self->aq_vec[self->aq_vecs]))
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
void aq_nic_shutdown(struct aq_nic_s *self)
{
int err = 0;
@@ -1272,6 +1292,7 @@ void aq_nic_release_filter(struct aq_nic_s *self, enum aq_rx_filter_type type,
int aq_nic_setup_tc_mqprio(struct aq_nic_s *self, u32 tcs, u8 *prio_tc_map)
{
struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
+ const unsigned int prev_vecs = cfg->vecs;
bool ndev_running;
int err = 0;
int i;
@@ -1303,9 +1324,18 @@ int aq_nic_setup_tc_mqprio(struct aq_nic_s *self, u32 tcs, u8 *prio_tc_map)
netdev_set_num_tc(self->ndev, cfg->tcs);
+ /* Changing the number of TCs might change the number of vectors */
+ aq_nic_cfg_update_num_vecs(self);
+ if (prev_vecs != cfg->vecs) {
+ err = aq_nic_realloc_vectors(self);
+ if (err)
+ goto err_exit;
+ }
+
if (ndev_running)
err = dev_open(self->ndev, NULL);
+err_exit:
return err;
}
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
index 7dd2530453da..cff42a2a2936 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
@@ -173,6 +173,7 @@ void aq_nic_deinit(struct aq_nic_s *self, bool link_down);
void aq_nic_set_power(struct aq_nic_s *self);
void aq_nic_free_hot_resources(struct aq_nic_s *self);
void aq_nic_free_vectors(struct aq_nic_s *self);
+int aq_nic_realloc_vectors(struct aq_nic_s *self);
int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu);
int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev);
int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags);
--
2.13.6
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