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Message-Id: <20170406122448.31854-2-hch@lst.de>
Date: Thu, 6 Apr 2017 14:24:45 +0200
From: Christoph Hellwig <hch@....de>
To: bhelgaas@...gle.com, davem@...emloft.net,
netanel@...apurnalabs.com, jcliburn@...il.com,
chris.snook@...il.com, sgoutham@...ium.com, rric@...nel.org
Cc: netdev@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH 1/4] net: alx: switch to pci_alloc_irq_vectors
Remove the deprecated pci_enable_msix API in favour of it's successor,
and make sure to handle errors during IRQ setup properly.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/net/ethernet/atheros/alx/alx.h | 6 --
drivers/net/ethernet/atheros/alx/main.c | 128 ++++++++++++++------------------
2 files changed, 54 insertions(+), 80 deletions(-)
diff --git a/drivers/net/ethernet/atheros/alx/alx.h b/drivers/net/ethernet/atheros/alx/alx.h
index d4a409139ea2..78c5de467426 100644
--- a/drivers/net/ethernet/atheros/alx/alx.h
+++ b/drivers/net/ethernet/atheros/alx/alx.h
@@ -102,9 +102,6 @@ struct alx_napi {
#define ALX_MAX_NAPIS 8
-#define ALX_FLAG_USING_MSIX BIT(0)
-#define ALX_FLAG_USING_MSI BIT(1)
-
struct alx_priv {
struct net_device *dev;
@@ -112,7 +109,6 @@ struct alx_priv {
/* msi-x vectors */
int num_vec;
- struct msix_entry *msix_entries;
/* all descriptor memory */
struct {
@@ -139,8 +135,6 @@ struct alx_priv {
u16 msg_enable;
- int flags;
-
/* protects hw.stats */
spinlock_t stats_lock;
};
diff --git a/drivers/net/ethernet/atheros/alx/main.c b/drivers/net/ethernet/atheros/alx/main.c
index 6a27c2662675..a8c2db881b75 100644
--- a/drivers/net/ethernet/atheros/alx/main.c
+++ b/drivers/net/ethernet/atheros/alx/main.c
@@ -314,7 +314,7 @@ static int alx_poll(struct napi_struct *napi, int budget)
napi_complete_done(&np->napi, work);
/* enable interrupt */
- if (alx->flags & ALX_FLAG_USING_MSIX) {
+ if (alx->hw.pdev->msix_enabled) {
alx_mask_msix(hw, np->vec_idx, false);
} else {
spin_lock_irqsave(&alx->irq_lock, flags);
@@ -811,7 +811,7 @@ static void alx_config_vector_mapping(struct alx_priv *alx)
u32 tbl[2] = {0, 0};
int i, vector, idx, shift;
- if (alx->flags & ALX_FLAG_USING_MSIX) {
+ if (alx->hw.pdev->msix_enabled) {
/* tx mappings */
for (i = 0, vector = 1; i < alx->num_txq; i++, vector++) {
idx = txq_vec_mapping_shift[i * 2];
@@ -828,29 +828,19 @@ static void alx_config_vector_mapping(struct alx_priv *alx)
alx_write_mem32(hw, ALX_MSI_ID_MAP, 0);
}
-static bool alx_enable_msix(struct alx_priv *alx)
+static int alx_enable_msix(struct alx_priv *alx)
{
- int i, err, num_vec, num_txq, num_rxq;
+ int err, num_vec, num_txq, num_rxq;
num_txq = min_t(int, num_online_cpus(), ALX_MAX_TX_QUEUES);
num_rxq = 1;
num_vec = max_t(int, num_txq, num_rxq) + 1;
- alx->msix_entries = kcalloc(num_vec, sizeof(struct msix_entry),
- GFP_KERNEL);
- if (!alx->msix_entries) {
- netdev_warn(alx->dev, "Allocation of msix entries failed!\n");
- return false;
- }
-
- for (i = 0; i < num_vec; i++)
- alx->msix_entries[i].entry = i;
-
- err = pci_enable_msix(alx->hw.pdev, alx->msix_entries, num_vec);
+ err = pci_alloc_irq_vectors(alx->hw.pdev, num_vec, num_vec,
+ PCI_IRQ_MSIX);
if (err) {
- kfree(alx->msix_entries);
netdev_warn(alx->dev, "Enabling MSI-X interrupts failed!\n");
- return false;
+ return err;
}
alx->num_vec = num_vec;
@@ -858,7 +848,7 @@ static bool alx_enable_msix(struct alx_priv *alx)
alx->num_txq = num_txq;
alx->num_rxq = num_rxq;
- return true;
+ return err;
}
static int alx_request_msix(struct alx_priv *alx)
@@ -866,7 +856,7 @@ static int alx_request_msix(struct alx_priv *alx)
struct net_device *netdev = alx->dev;
int i, err, vector = 0, free_vector = 0;
- err = request_irq(alx->msix_entries[0].vector, alx_intr_msix_misc,
+ err = request_irq(pci_irq_vector(alx->hw.pdev, 0), alx_intr_msix_misc,
0, netdev->name, alx);
if (err)
goto out_err;
@@ -889,7 +879,7 @@ static int alx_request_msix(struct alx_priv *alx)
sprintf(np->irq_lbl, "%s-unused", netdev->name);
np->vec_idx = vector;
- err = request_irq(alx->msix_entries[vector].vector,
+ err = request_irq(pci_irq_vector(alx->hw.pdev, vector),
alx_intr_msix_ring, 0, np->irq_lbl, np);
if (err)
goto out_free;
@@ -897,47 +887,31 @@ static int alx_request_msix(struct alx_priv *alx)
return 0;
out_free:
- free_irq(alx->msix_entries[free_vector++].vector, alx);
+ free_irq(pci_irq_vector(alx->hw.pdev, free_vector++), alx);
vector--;
for (i = 0; i < vector; i++)
- free_irq(alx->msix_entries[free_vector++].vector,
+ free_irq(pci_irq_vector(alx->hw.pdev,free_vector++),
alx->qnapi[i]);
out_err:
return err;
}
-static void alx_init_intr(struct alx_priv *alx, bool msix)
+static int alx_init_intr(struct alx_priv *alx)
{
- if (msix) {
- if (alx_enable_msix(alx))
- alx->flags |= ALX_FLAG_USING_MSIX;
- }
+ int ret;
- if (!(alx->flags & ALX_FLAG_USING_MSIX)) {
- alx->num_vec = 1;
- alx->num_napi = 1;
- alx->num_txq = 1;
- alx->num_rxq = 1;
-
- if (!pci_enable_msi(alx->hw.pdev))
- alx->flags |= ALX_FLAG_USING_MSI;
- }
-}
-
-static void alx_disable_advanced_intr(struct alx_priv *alx)
-{
- if (alx->flags & ALX_FLAG_USING_MSIX) {
- kfree(alx->msix_entries);
- pci_disable_msix(alx->hw.pdev);
- alx->flags &= ~ALX_FLAG_USING_MSIX;
- }
+ ret = pci_alloc_irq_vectors(alx->hw.pdev, 1, 1,
+ PCI_IRQ_MSI | PCI_IRQ_LEGACY);
+ if (ret)
+ return ret;
- if (alx->flags & ALX_FLAG_USING_MSI) {
- pci_disable_msi(alx->hw.pdev);
- alx->flags &= ~ALX_FLAG_USING_MSI;
- }
+ alx->num_vec = 1;
+ alx->num_napi = 1;
+ alx->num_txq = 1;
+ alx->num_rxq = 1;
+ return 0;
}
static void alx_irq_enable(struct alx_priv *alx)
@@ -950,10 +924,11 @@ static void alx_irq_enable(struct alx_priv *alx)
alx_write_mem32(hw, ALX_IMR, alx->int_mask);
alx_post_write(hw);
- if (alx->flags & ALX_FLAG_USING_MSIX)
+ if (alx->hw.pdev->msix_enabled) {
/* enable all msix irqs */
for (i = 0; i < alx->num_vec; i++)
alx_mask_msix(hw, i, false);
+ }
}
static void alx_irq_disable(struct alx_priv *alx)
@@ -965,13 +940,13 @@ static void alx_irq_disable(struct alx_priv *alx)
alx_write_mem32(hw, ALX_IMR, 0);
alx_post_write(hw);
- if (alx->flags & ALX_FLAG_USING_MSIX) {
+ if (alx->hw.pdev->msix_enabled) {
for (i = 0; i < alx->num_vec; i++) {
alx_mask_msix(hw, i, true);
- synchronize_irq(alx->msix_entries[i].vector);
+ synchronize_irq(pci_irq_vector(alx->hw.pdev, i));
}
} else {
- synchronize_irq(alx->hw.pdev->irq);
+ synchronize_irq(pci_irq_vector(alx->hw.pdev, 0));
}
}
@@ -981,8 +956,11 @@ static int alx_realloc_resources(struct alx_priv *alx)
alx_free_rings(alx);
alx_free_napis(alx);
- alx_disable_advanced_intr(alx);
- alx_init_intr(alx, false);
+ pci_free_irq_vectors(alx->hw.pdev);
+
+ err = alx_init_intr(alx);
+ if (err)
+ return err;
err = alx_alloc_napis(alx);
if (err)
@@ -1004,7 +982,7 @@ static int alx_request_irq(struct alx_priv *alx)
msi_ctrl = (hw->imt >> 1) << ALX_MSI_RETRANS_TM_SHIFT;
- if (alx->flags & ALX_FLAG_USING_MSIX) {
+ if (alx->hw.pdev->msix_enabled) {
alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, msi_ctrl);
err = alx_request_msix(alx);
if (!err)
@@ -1016,20 +994,20 @@ static int alx_request_irq(struct alx_priv *alx)
goto out;
}
- if (alx->flags & ALX_FLAG_USING_MSI) {
+ if (alx->hw.pdev->msi_enabled) {
alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER,
msi_ctrl | ALX_MSI_MASK_SEL_LINE);
- err = request_irq(pdev->irq, alx_intr_msi, 0,
+ err = request_irq(pci_irq_vector(pdev, 0), alx_intr_msi, 0,
alx->dev->name, alx);
if (!err)
goto out;
+
/* fall back to legacy interrupt */
- alx->flags &= ~ALX_FLAG_USING_MSI;
- pci_disable_msi(alx->hw.pdev);
+ pci_free_irq_vectors(alx->hw.pdev);
}
alx_write_mem32(hw, ALX_MSI_RETRANS_TIMER, 0);
- err = request_irq(pdev->irq, alx_intr_legacy, IRQF_SHARED,
+ err = request_irq(pci_irq_vector(pdev, 0), alx_intr_legacy, IRQF_SHARED,
alx->dev->name, alx);
out:
if (!err)
@@ -1042,18 +1020,15 @@ static int alx_request_irq(struct alx_priv *alx)
static void alx_free_irq(struct alx_priv *alx)
{
struct pci_dev *pdev = alx->hw.pdev;
- int i, vector = 0;
+ int i;
- if (alx->flags & ALX_FLAG_USING_MSIX) {
- free_irq(alx->msix_entries[vector++].vector, alx);
+ free_irq(pci_irq_vector(pdev, 0), alx);
+ if (alx->hw.pdev->msix_enabled) {
for (i = 0; i < alx->num_napi; i++)
- free_irq(alx->msix_entries[vector++].vector,
- alx->qnapi[i]);
- } else {
- free_irq(pdev->irq, alx);
+ free_irq(pci_irq_vector(pdev, i + 1), alx->qnapi[i]);
}
- alx_disable_advanced_intr(alx);
+ pci_free_irq_vectors(pdev);
}
static int alx_identify_hw(struct alx_priv *alx)
@@ -1221,7 +1196,12 @@ static int __alx_open(struct alx_priv *alx, bool resume)
{
int err;
- alx_init_intr(alx, true);
+ err = alx_enable_msix(alx);
+ if (err < 0) {
+ err = alx_init_intr(alx);
+ if (err)
+ return err;
+ }
if (!resume)
netif_carrier_off(alx->dev);
@@ -1264,7 +1244,7 @@ static int __alx_open(struct alx_priv *alx, bool resume)
alx_free_rings(alx);
alx_free_napis(alx);
out_disable_adv_intr:
- alx_disable_advanced_intr(alx);
+ pci_free_irq_vectors(alx->hw.pdev);
return err;
}
@@ -1637,11 +1617,11 @@ static void alx_poll_controller(struct net_device *netdev)
struct alx_priv *alx = netdev_priv(netdev);
int i;
- if (alx->flags & ALX_FLAG_USING_MSIX) {
+ if (alx->hw.pdev->msix_enabled) {
alx_intr_msix_misc(0, alx);
for (i = 0; i < alx->num_txq; i++)
alx_intr_msix_ring(0, alx->qnapi[i]);
- } else if (alx->flags & ALX_FLAG_USING_MSI)
+ } else if (alx->hw.pdev->msi_enabled)
alx_intr_msi(0, alx);
else
alx_intr_legacy(0, alx);
@@ -1783,7 +1763,7 @@ static int alx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
netdev->netdev_ops = &alx_netdev_ops;
netdev->ethtool_ops = &alx_ethtool_ops;
- netdev->irq = pdev->irq;
+ netdev->irq = pci_irq_vector(pdev, 0);
netdev->watchdog_timeo = ALX_WATCHDOG_TIME;
if (ent->driver_data & ALX_DEV_QUIRK_MSI_INTX_DISABLE_BUG)
--
2.11.0
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