[PATCH 1/1] inside-secure irq balance

[Sven Auhagen]

Balance the irqs of the inside secure driver over all
available cpus.
Currently all interrupts are handled by the first CPU.

>From my testing with IPSec AES-GCM 256
on my MCbin with 4 Cores I get a 50% speed increase:

Before the patch: 99.73 Kpps
With the patch: 151.25 Kpps

Signed-off-by: Sven Auhagen <sven.auha...@voleatech.de>
---
 drivers/crypto/inside-secure/safexcel.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/inside-secure/safexcel.c 
b/drivers/crypto/inside-secure/safexcel.c
index 2cb53fbae841..f206084be08e 100644
--- a/drivers/crypto/inside-secure/safexcel.c
+++ b/drivers/crypto/inside-secure/safexcel.c
@@ -1135,11 +1135,12 @@ static irqreturn_t safexcel_irq_ring_thread(int irq, 
void *data)
 
 static int safexcel_request_ring_irq(void *pdev, int irqid,
                                     int is_pci_dev,
+                                    int ring_id,
                                     irq_handler_t handler,
                                     irq_handler_t threaded_handler,
                                     struct safexcel_ring_irq_data 
*ring_irq_priv)
 {
-       int ret, irq;
+       int ret, irq, cpu;
        struct device *dev;
 
        if (IS_ENABLED(CONFIG_PCI) && is_pci_dev) {
@@ -1177,6 +1178,10 @@ static int safexcel_request_ring_irq(void *pdev, int 
irqid,
                return ret;
        }
 
+       // Set affinity
+       cpu = ring_id % num_online_cpus();
+       irq_set_affinity_hint(irq, get_cpu_mask(cpu));
+
        return irq;
 }
 
@@ -1611,6 +1616,7 @@ static int safexcel_probe_generic(void *pdev,
                irq = safexcel_request_ring_irq(pdev,
                                                EIP197_IRQ_NUMBER(i, 
is_pci_dev),
                                                is_pci_dev,
+                                               i,
                                                safexcel_irq_ring,
                                                safexcel_irq_ring_thread,
                                                ring_irq);
-- 
2.20.1