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Date: Fri, 26 Apr 2019 09:47:52 +0000
From: Igor Russkikh <Igor.Russkikh@...antia.com>
To: "David S . Miller" <davem@...emloft.net>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
Nikita Danilov <Nikita.Danilov@...antia.com>,
Dmitry Bogdanov <Dmitry.Bogdanov@...antia.com>,
Igor Russkikh <Igor.Russkikh@...antia.com>
Subject: [PATCH v3 net-next 06/15] net: aquantia: link status irq handling
Here we define and request an extra interrupt line,
assign it on link isr handler and restructure abit aq_pci code
to better support that.
We also remove logic for using different timer intervals
depending on link state, since thats now useless.
Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
---
.../net/ethernet/aquantia/atlantic/aq_nic.c | 36 ++++++++++++++-----
.../ethernet/aquantia/atlantic/aq_pci_func.c | 24 ++++++++-----
.../ethernet/aquantia/atlantic/aq_pci_func.h | 4 +--
.../aquantia/atlantic/hw_atl/hw_atl_b0.c | 5 +++
4 files changed, 50 insertions(+), 19 deletions(-)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 4851fc0a3ae5..0251566b66af 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -14,6 +14,7 @@
#include "aq_vec.h"
#include "aq_hw.h"
#include "aq_pci_func.h"
+#include "aq_main.h"
#include <linux/moduleparam.h>
#include <linux/netdevice.h>
@@ -92,7 +93,8 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
/*rss rings */
cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
cfg->vecs = min(cfg->vecs, num_online_cpus());
- cfg->vecs = min(cfg->vecs, self->irqvecs);
+ 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;
@@ -116,6 +118,15 @@ void aq_nic_cfg_start(struct aq_nic_s *self)
cfg->vecs = 1U;
}
+ /* Check if we have enough vectors allocated for
+ * link status IRQ. If no - we'll know link state from
+ * slower service task.
+ */
+ if (AQ_HW_SERVICE_IRQS > 0 && cfg->vecs + 1 <= self->irqvecs)
+ cfg->link_irq_vec = cfg->vecs;
+ else
+ cfg->link_irq_vec = 0;
+
cfg->link_speed_msk &= cfg->aq_hw_caps->link_speed_msk;
cfg->features = cfg->aq_hw_caps->hw_features;
}
@@ -178,7 +189,6 @@ static irqreturn_t aq_linkstate_threaded_isr(int irq, void *private)
static void aq_nic_service_timer_cb(struct timer_list *t)
{
struct aq_nic_s *self = from_timer(self, t, service_timer);
- int ctimer = AQ_CFG_SERVICE_TIMER_INTERVAL;
int err = 0;
if (aq_utils_obj_test(&self->flags, AQ_NIC_FLAGS_IS_NOT_READY))
@@ -193,12 +203,8 @@ static void aq_nic_service_timer_cb(struct timer_list *t)
aq_nic_update_ndev_stats(self);
- /* If no link - use faster timer rate to detect link up asap */
- if (!netif_carrier_ok(self->ndev))
- ctimer = max(ctimer / 2, 1);
-
err_exit:
- mod_timer(&self->service_timer, jiffies + ctimer);
+ mod_timer(&self->service_timer, jiffies + AQ_CFG_SERVICE_TIMER_INTERVAL);
}
static void aq_nic_polling_timer_cb(struct timer_list *t)
@@ -359,13 +365,25 @@ int aq_nic_start(struct aq_nic_s *self)
} else {
for (i = 0U, aq_vec = self->aq_vec[0];
self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
- err = aq_pci_func_alloc_irq(self, i,
- self->ndev->name, aq_vec,
+ err = aq_pci_func_alloc_irq(self, i, self->ndev->name,
+ aq_vec_isr, aq_vec,
aq_vec_get_affinity_mask(aq_vec));
if (err < 0)
goto err_exit;
}
+ if (self->aq_nic_cfg.link_irq_vec) {
+ int irqvec = pci_irq_vector(self->pdev,
+ self->aq_nic_cfg.link_irq_vec);
+ err = request_threaded_irq(irqvec, NULL,
+ aq_linkstate_threaded_isr,
+ IRQF_SHARED,
+ self->ndev->name, self);
+ if (err < 0)
+ goto err_exit;
+ self->msix_entry_mask |= (1 << self->aq_nic_cfg.link_irq_vec);
+ }
+
err = self->aq_hw_ops->hw_irq_enable(self->aq_hw,
AQ_CFG_IRQ_MASK);
if (err < 0)
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
index 151efd8f21d8..9cb8dc7656aa 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
@@ -140,26 +140,27 @@ int aq_pci_func_init(struct pci_dev *pdev)
}
int aq_pci_func_alloc_irq(struct aq_nic_s *self, unsigned int i,
- char *name, void *aq_vec, cpumask_t *affinity_mask)
+ char *name, irq_handler_t irq_handler,
+ void *irq_arg, cpumask_t *affinity_mask)
{
struct pci_dev *pdev = self->pdev;
int err;
if (pdev->msix_enabled || pdev->msi_enabled)
- err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr, 0,
- name, aq_vec);
+ err = request_irq(pci_irq_vector(pdev, i), irq_handler, 0,
+ name, irq_arg);
else
err = request_irq(pci_irq_vector(pdev, i), aq_vec_isr_legacy,
- IRQF_SHARED, name, aq_vec);
+ IRQF_SHARED, name, irq_arg);
if (err >= 0) {
self->msix_entry_mask |= (1 << i);
- self->aq_vec[i] = aq_vec;
- if (pdev->msix_enabled)
+ if (pdev->msix_enabled && affinity_mask)
irq_set_affinity_hint(pci_irq_vector(pdev, i),
affinity_mask);
}
+
return err;
}
@@ -167,16 +168,22 @@ void aq_pci_func_free_irqs(struct aq_nic_s *self)
{
struct pci_dev *pdev = self->pdev;
unsigned int i;
+ void *irq_data;
for (i = 32U; i--;) {
if (!((1U << i) & self->msix_entry_mask))
continue;
- if (i >= AQ_CFG_VECS_MAX)
+ if (self->aq_nic_cfg.link_irq_vec &&
+ i == self->aq_nic_cfg.link_irq_vec)
+ irq_data = self;
+ else if (i < AQ_CFG_VECS_MAX)
+ irq_data = self->aq_vec[i];
+ else
continue;
if (pdev->msix_enabled)
irq_set_affinity_hint(pci_irq_vector(pdev, i), NULL);
- free_irq(pci_irq_vector(pdev, i), self->aq_vec[i]);
+ free_irq(pci_irq_vector(pdev, i), irq_data);
self->msix_entry_mask &= ~(1U << i);
}
}
@@ -269,6 +276,7 @@ static int aq_pci_probe(struct pci_dev *pdev,
numvecs = min((u8)AQ_CFG_VECS_DEF,
aq_nic_get_cfg(self)->aq_hw_caps->msix_irqs);
numvecs = min(numvecs, num_online_cpus());
+ numvecs += AQ_HW_SERVICE_IRQS;
/*enable interrupts */
#if !AQ_CFG_FORCE_LEGACY_INT
err = pci_alloc_irq_vectors(self->pdev, 1, numvecs,
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
index 799c5e0d653b..670f9a940d65 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
@@ -24,8 +24,8 @@ struct aq_board_revision_s {
int aq_pci_func_init(struct pci_dev *pdev);
int aq_pci_func_alloc_irq(struct aq_nic_s *self, unsigned int i,
- char *name, void *aq_vec,
- cpumask_t *affinity_mask);
+ char *name, irq_handler_t irq_handler,
+ void *irq_arg, cpumask_t *affinity_mask);
void aq_pci_func_free_irqs(struct aq_nic_s *self);
unsigned int aq_pci_func_get_irq_type(struct aq_nic_s *self);
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index 7e95804e2180..d54566bab0e9 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -443,6 +443,11 @@ static int hw_atl_b0_hw_init(struct aq_hw_s *self, u8 *mac_addr)
((HW_ATL_B0_ERR_INT << 0x18) | (1U << 0x1F)) |
((HW_ATL_B0_ERR_INT << 0x10) | (1U << 0x17)), 0U);
+ /* Enable link interrupt */
+ if (aq_nic_cfg->link_irq_vec)
+ hw_atl_reg_gen_irq_map_set(self, BIT(7) |
+ aq_nic_cfg->link_irq_vec, 3U);
+
hw_atl_b0_hw_offload_set(self, aq_nic_cfg);
err_exit:
--
2.17.1
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