[PATCH] net: thunderx: Switch to pci_alloc_irq_vectors

From: dev . srinivasulu
Date: Tue Apr 04 2017 - 05:34:29 EST

From: Thanneeru Srinivasulu <tsrinivasulu@xxxxxxxxxx>

Remove deprecated pci_enable_msix API in favour of it's
successor pci_alloc_irq_vectors.

Signed-off-by: Thanneeru Srinivasulu <tsrinivasulu@xxxxxxxxxx>
Signed-off-by: Sunil Goutham <sgoutham@xxxxxxxxxx>
---
drivers/net/ethernet/cavium/thunder/nic.h | 2 -
drivers/net/ethernet/cavium/thunder/nic_main.c | 64 +++++---------------
drivers/net/ethernet/cavium/thunder/nicvf_main.c | 70 ++++++++--------------
3 files changed, 40 insertions(+), 96 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h
index 2269ff5..6fb4421 100644
--- a/drivers/net/ethernet/cavium/thunder/nic.h
+++ b/drivers/net/ethernet/cavium/thunder/nic.h
@@ -319,9 +319,7 @@ struct nicvf {
struct bgx_stats bgx_stats;

/* MSI-X */
- bool msix_enabled;
u8 num_vec;
- struct msix_entry msix_entries[NIC_VF_MSIX_VECTORS];
char irq_name[NIC_VF_MSIX_VECTORS][IFNAMSIZ + 15];
bool irq_allocated[NIC_VF_MSIX_VECTORS];
cpumask_var_t affinity_mask[NIC_VF_MSIX_VECTORS];
diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index 767234e..fb770b0 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -65,9 +65,7 @@ struct nicpf {
bool mbx_lock[MAX_NUM_VFS_SUPPORTED];

/* MSI-X */
- bool msix_enabled;
u8 num_vec;
- struct msix_entry *msix_entries;
bool irq_allocated[NIC_PF_MSIX_VECTORS];
char irq_name[NIC_PF_MSIX_VECTORS][20];
};
@@ -1088,7 +1086,7 @@ static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)
u64 intr;
u8 vf, vf_per_mbx_reg = 64;

- if (irq == nic->msix_entries[NIC_PF_INTR_ID_MBOX0].vector)
+ if (irq == pci_irq_vector(nic->pdev, NIC_PF_INTR_ID_MBOX0))
mbx = 0;
else
mbx = 1;
@@ -1107,51 +1105,13 @@ static irqreturn_t nic_mbx_intr_handler(int irq, void *nic_irq)
return IRQ_HANDLED;
}

-static int nic_enable_msix(struct nicpf *nic)
-{
- int i, ret;
-
- nic->num_vec = pci_msix_vec_count(nic->pdev);
-
- nic->msix_entries = kmalloc_array(nic->num_vec,
- sizeof(struct msix_entry),
- GFP_KERNEL);
- if (!nic->msix_entries)
- return -ENOMEM;
-
- for (i = 0; i < nic->num_vec; i++)
- nic->msix_entries[i].entry = i;
-
- ret = pci_enable_msix(nic->pdev, nic->msix_entries, nic->num_vec);
- if (ret) {
- dev_err(&nic->pdev->dev,
- "Request for #%d msix vectors failed, returned %d\n",
- nic->num_vec, ret);
- kfree(nic->msix_entries);
- return ret;
- }
-
- nic->msix_enabled = 1;
- return 0;
-}
-
-static void nic_disable_msix(struct nicpf *nic)
-{
- if (nic->msix_enabled) {
- pci_disable_msix(nic->pdev);
- kfree(nic->msix_entries);
- nic->msix_enabled = 0;
- nic->num_vec = 0;
- }
-}
-
static void nic_free_all_interrupts(struct nicpf *nic)
{
int irq;

for (irq = 0; irq < nic->num_vec; irq++) {
if (nic->irq_allocated[irq])
- free_irq(nic->msix_entries[irq].vector, nic);
+ free_irq(pci_irq_vector(nic->pdev, irq), nic);
nic->irq_allocated[irq] = false;
}
}
@@ -1159,18 +1119,24 @@ static void nic_free_all_interrupts(struct nicpf *nic)
static int nic_register_interrupts(struct nicpf *nic)
{
int i, ret;
+ nic->num_vec = pci_msix_vec_count(nic->pdev);

/* Enable MSI-X */
- ret = nic_enable_msix(nic);
- if (ret)
- return ret;
+ ret = pci_alloc_irq_vectors(nic->pdev, nic->num_vec, nic->num_vec,
+ PCI_IRQ_MSIX);
+ if (ret < 0) {
+ dev_err(&nic->pdev->dev,
+ "Request for #%d msix vectors failed, returned %d\n",
+ nic->num_vec, ret);
+ return 1;
+ }

/* Register mailbox interrupt handler */
for (i = NIC_PF_INTR_ID_MBOX0; i < nic->num_vec; i++) {
sprintf(nic->irq_name[i],
"NICPF Mbox%d", (i - NIC_PF_INTR_ID_MBOX0));

- ret = request_irq(nic->msix_entries[i].vector,
+ ret = request_irq(pci_irq_vector(nic->pdev, i),
nic_mbx_intr_handler, 0,
nic->irq_name[i], nic);
if (ret)
@@ -1186,14 +1152,16 @@ static int nic_register_interrupts(struct nicpf *nic)
fail:
dev_err(&nic->pdev->dev, "Request irq failed\n");
nic_free_all_interrupts(nic);
- nic_disable_msix(nic);
+ pci_free_irq_vectors(nic->pdev);
+ nic->num_vec = 0;
return ret;
}

static void nic_unregister_interrupts(struct nicpf *nic)
{
nic_free_all_interrupts(nic);
- nic_disable_msix(nic);
+ pci_free_irq_vectors(nic->pdev);
+ nic->num_vec = 0;
}

static int nic_num_sqs_en(struct nicpf *nic, int vf_en)
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 2401758..bfaf858 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -882,38 +882,9 @@ static irqreturn_t nicvf_qs_err_intr_handler(int irq, void *nicvf_irq)
return IRQ_HANDLED;
}

-static int nicvf_enable_msix(struct nicvf *nic)
-{
- int ret, vec;
-
- nic->num_vec = NIC_VF_MSIX_VECTORS;
-
- for (vec = 0; vec < nic->num_vec; vec++)
- nic->msix_entries[vec].entry = vec;
-
- ret = pci_enable_msix(nic->pdev, nic->msix_entries, nic->num_vec);
- if (ret) {
- netdev_err(nic->netdev,
- "Req for #%d msix vectors failed\n", nic->num_vec);
- return 0;
- }
- nic->msix_enabled = 1;
- return 1;
-}
-
-static void nicvf_disable_msix(struct nicvf *nic)
-{
- if (nic->msix_enabled) {
- pci_disable_msix(nic->pdev);
- nic->msix_enabled = 0;
- nic->num_vec = 0;
- }
-}
-
static void nicvf_set_irq_affinity(struct nicvf *nic)
{
int vec, cpu;
- int irqnum;

for (vec = 0; vec < nic->num_vec; vec++) {
if (!nic->irq_allocated[vec])
@@ -930,15 +901,14 @@ static void nicvf_set_irq_affinity(struct nicvf *nic)

cpumask_set_cpu(cpumask_local_spread(cpu, nic->node),
nic->affinity_mask[vec]);
- irqnum = nic->msix_entries[vec].vector;
- irq_set_affinity_hint(irqnum, nic->affinity_mask[vec]);
+ irq_set_affinity_hint(pci_irq_vector(nic->pdev, vec),
+ nic->affinity_mask[vec]);
}
}

static int nicvf_register_interrupts(struct nicvf *nic)
{
int irq, ret = 0;
- int vector;

for_each_cq_irq(irq)
sprintf(nic->irq_name[irq], "%s-rxtx-%d",
@@ -957,8 +927,8 @@ static int nicvf_register_interrupts(struct nicvf *nic)

/* Register CQ interrupts */
for (irq = 0; irq < nic->qs->cq_cnt; irq++) {
- vector = nic->msix_entries[irq].vector;
- ret = request_irq(vector, nicvf_intr_handler,
+ ret = request_irq(pci_irq_vector(nic->pdev, irq),
+ nicvf_intr_handler,
0, nic->irq_name[irq], nic->napi[irq]);
if (ret)
goto err;
@@ -968,8 +938,8 @@ static int nicvf_register_interrupts(struct nicvf *nic)
/* Register RBDR interrupt */
for (irq = NICVF_INTR_ID_RBDR;
irq < (NICVF_INTR_ID_RBDR + nic->qs->rbdr_cnt); irq++) {
- vector = nic->msix_entries[irq].vector;
- ret = request_irq(vector, nicvf_rbdr_intr_handler,
+ ret = request_irq(pci_irq_vector(nic->pdev, irq),
+ nicvf_rbdr_intr_handler,
0, nic->irq_name[irq], nic);
if (ret)
goto err;
@@ -981,7 +951,7 @@ static int nicvf_register_interrupts(struct nicvf *nic)
nic->pnicvf->netdev->name,
nic->sqs_mode ? (nic->sqs_id + 1) : 0);
irq = NICVF_INTR_ID_QS_ERR;
- ret = request_irq(nic->msix_entries[irq].vector,
+ ret = request_irq(pci_irq_vector(nic->pdev, irq),
nicvf_qs_err_intr_handler,
0, nic->irq_name[irq], nic);
if (ret)
@@ -1001,6 +971,7 @@ static int nicvf_register_interrupts(struct nicvf *nic)

static void nicvf_unregister_interrupts(struct nicvf *nic)
{
+ struct pci_dev *pdev = nic->pdev;
int irq;

/* Free registered interrupts */
@@ -1008,19 +979,20 @@ static void nicvf_unregister_interrupts(struct nicvf *nic)
if (!nic->irq_allocated[irq])
continue;

- irq_set_affinity_hint(nic->msix_entries[irq].vector, NULL);
+ irq_set_affinity_hint(pci_irq_vector(pdev, irq), NULL);
free_cpumask_var(nic->affinity_mask[irq]);

if (irq < NICVF_INTR_ID_SQ)
- free_irq(nic->msix_entries[irq].vector, nic->napi[irq]);
+ free_irq(pci_irq_vector(pdev, irq), nic->napi[irq]);
else
- free_irq(nic->msix_entries[irq].vector, nic);
+ free_irq(pci_irq_vector(pdev, irq), nic);

nic->irq_allocated[irq] = false;
}

/* Disable MSI-X */
- nicvf_disable_msix(nic);
+ pci_free_irq_vectors(pdev);
+ nic->num_vec = 0;
}

/* Initialize MSIX vectors and register MISC interrupt.
@@ -1032,16 +1004,22 @@ static int nicvf_register_misc_interrupt(struct nicvf *nic)
int irq = NICVF_INTR_ID_MISC;

/* Return if mailbox interrupt is already registered */
- if (nic->msix_enabled)
+ if (nic->pdev->msix_enabled)
return 0;

/* Enable MSI-X */
- if (!nicvf_enable_msix(nic))
+ nic->num_vec = pci_msix_vec_count(nic->pdev);
+ ret = pci_alloc_irq_vectors(nic->pdev, nic->num_vec, nic->num_vec,
+ PCI_IRQ_MSIX);
+ if (ret < 0) {
+ netdev_err(nic->netdev,
+ "Req for #%d msix vectors failed\n", nic->num_vec);
return 1;
+ }

sprintf(nic->irq_name[irq], "%s Mbox", "NICVF");
/* Register Misc interrupt */
- ret = request_irq(nic->msix_entries[irq].vector,
+ ret = request_irq(pci_irq_vector(nic->pdev, irq),
nicvf_misc_intr_handler, 0, nic->irq_name[irq], nic);

if (ret)
@@ -1164,7 +1142,7 @@ int nicvf_stop(struct net_device *netdev)

/* Wait for pending IRQ handlers to finish */
for (irq = 0; irq < nic->num_vec; irq++)
- synchronize_irq(nic->msix_entries[irq].vector);
+ synchronize_irq(pci_irq_vector(nic->pdev, irq));

tasklet_kill(&nic->rbdr_task);
tasklet_kill(&nic->qs_err_task);
@@ -1365,7 +1343,7 @@ static int nicvf_set_mac_address(struct net_device *netdev, void *p)

memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);

- if (nic->msix_enabled) {
+ if (nic->pdev->msix_enabled) {
if (nicvf_hw_set_mac_addr(nic, netdev))
return -EBUSY;
} else {
--
1.7.1