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White Rabbit Network Interface Card
Commit 3508bf44 authored by Miguel Jimenez Lopez's avatar Miguel Jimenez Lopez
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Update NIC driver for the new IRQ scheme.

parent e09e5b30
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Showing with 6 additions and 68 deletions
sw/kernel/device.c
View file @ 3508bf44
...@@ -23,33 +23,10 @@ ...@@ -23,33 +23,10 @@
#include <linux/spinlock.h> #include <linux/spinlock.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/irqdomain.h>
#include "wr-nic.h" #include "wr-nic.h"
#include "nic-mem.h" #include "nic-mem.h"
/**
* IRQ domain to be used. This is static here but in general it should be
* a module parameter or somehow configurable. For the time being we keep
* it hard-coded here.
*/
#define HTVIC_IRQDOMAIN_NAME "htvic-irq"
static struct irq_domain * irq_find_irqdomain(const char *name)
{
struct irq_fwspec fwspec;
struct irq_domain *d = NULL;
memset(&fwspec,0,sizeof(fwspec));
fwspec.fwnode = (struct fwnode_handle *) name;
fwspec.param_count = 1;
d = irq_find_matching_fwspec(&fwspec,DOMAIN_BUS_ANY);
return d;
}
static inline struct wrn_dev *wrn_from_pdev(struct platform_device *pdev) static inline struct wrn_dev *wrn_from_pdev(struct platform_device *pdev)
{ {
#if WR_IS_SWITCH #if WR_IS_SWITCH
...@@ -64,25 +41,6 @@ static int wrn_remove(struct platform_device *pdev) ...@@ -64,25 +41,6 @@ static int wrn_remove(struct platform_device *pdev)
{ {
struct wrn_dev *wrn = wrn_from_pdev(pdev); struct wrn_dev *wrn = wrn_from_pdev(pdev);
int i, irq; int i, irq;
struct irq_domain *irqdomain;
char *irqdomain_name;
struct resource *r;
r = platform_get_resource(pdev, IORESOURCE_BUS, 0);
irqdomain_name = kasprintf(GFP_KERNEL, "%s-%d:%d",
HTVIC_IRQDOMAIN_NAME,
(unsigned char) ((!r) ? 0 : r->start),
(unsigned int) ((!r) ? 0 : r->end));
irqdomain = irq_find_irqdomain(irqdomain_name);
if (!irqdomain) {
dev_err(&pdev->dev, "The IRQ domain %s does not exist\n",
irqdomain_name);
return -EINVAL;
}
kfree(irqdomain_name);
if (WR_IS_SWITCH) { if (WR_IS_SWITCH) {
spin_lock(&wrn->lock); spin_lock(&wrn->lock);
...@@ -113,8 +71,7 @@ static int wrn_remove(struct platform_device *pdev) ...@@ -113,8 +71,7 @@ static int wrn_remove(struct platform_device *pdev)
for (i = 0; wrn->irq_registered; i++) { for (i = 0; wrn->irq_registered; i++) {
static int irqs[] = WRN_IRQ_NUMBERS; static int irqs[] = WRN_IRQ_NUMBERS;
if (wrn->irq_registered & (1 << i)) { if (wrn->irq_registered & (1 << i)) {
irq = irq_find_mapping(irqdomain, irqs[i]); free_irq(irqs[i], wrn);
free_irq(irq, wrn);
} }
wrn->irq_registered &= ~(1 << i); wrn->irq_registered &= ~(1 << i);
} }
...@@ -124,7 +81,7 @@ static int wrn_remove(struct platform_device *pdev) ...@@ -124,7 +81,7 @@ static int wrn_remove(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_IRQ, i); res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
if (!res) if (!res)
continue; continue;
irq = irq_find_mapping(irqdomain, res->start); irq = res->start;
free_irq(irq, wrn); free_irq(irq, wrn);
wrn->irq_registered &= ~(1 << i); wrn->irq_registered &= ~(1 << i);
} }
...@@ -165,7 +122,7 @@ static int __wrn_map_resources(struct platform_device *pdev) ...@@ -165,7 +122,7 @@ static int __wrn_map_resources(struct platform_device *pdev)
} }
/* This helper is used by probe below */ /* This helper is used by probe below */
static int __wrn_map_irq(struct platform_device *pdev, struct irq_domain *irqdomain) static int __wrn_map_irq(struct platform_device *pdev)
{ {
int i; int i;
struct resource *res; struct resource *res;
...@@ -180,7 +137,7 @@ static int __wrn_map_irq(struct platform_device *pdev, struct irq_domain *irqdom ...@@ -180,7 +137,7 @@ static int __wrn_map_irq(struct platform_device *pdev, struct irq_domain *irqdom
if (WR_IS_SWITCH) { if (WR_IS_SWITCH) {
/* Register the interrupt handlers (not shared) */ /* Register the interrupt handlers (not shared) */
for (i = 0; i < ARRAY_SIZE(irq_names); i++) { for (i = 0; i < ARRAY_SIZE(irq_names); i++) {
irq = irq_find_mapping(irqdomain, irqs[i]); irq = irqs[i];
err = request_any_context_irq(irq, irq_handlers[i], err = request_any_context_irq(irq, irq_handlers[i],
IRQF_TRIGGER_LOW, irq_names[i], wrn); IRQF_TRIGGER_LOW, irq_names[i], wrn);
if (err < 0) if (err < 0)
...@@ -193,7 +150,7 @@ static int __wrn_map_irq(struct platform_device *pdev, struct irq_domain *irqdom ...@@ -193,7 +150,7 @@ static int __wrn_map_irq(struct platform_device *pdev, struct irq_domain *irqdom
res = platform_get_resource(pdev, IORESOURCE_IRQ, i); res = platform_get_resource(pdev, IORESOURCE_IRQ, i);
if (!res) if (!res)
continue; continue;
irq = irq_find_mapping(irqdomain, res->start); irq = res->start;
err = request_any_context_irq(irq, irq_handlers[i], err = request_any_context_irq(irq, irq_handlers[i],
IRQF_TRIGGER_HIGH, res->name, wrn); IRQF_TRIGGER_HIGH, res->name, wrn);
...@@ -214,25 +171,6 @@ static int wrn_probe(struct platform_device *pdev) ...@@ -214,25 +171,6 @@ static int wrn_probe(struct platform_device *pdev)
struct wrn_ep *ep; struct wrn_ep *ep;
struct wrn_dev *wrn = wrn_from_pdev(pdev); struct wrn_dev *wrn = wrn_from_pdev(pdev);
int i, err = 0; int i, err = 0;
struct irq_domain *irqdomain;
char *irqdomain_name;
struct resource *r;
r = platform_get_resource(pdev, IORESOURCE_BUS, 0);
irqdomain_name = kasprintf(GFP_KERNEL, "%s-%d:%d",
HTVIC_IRQDOMAIN_NAME,
(unsigned char) ((!r) ? 0 : r->start),
(unsigned int) ((!r) ? 0 : r->end));
irqdomain = irq_find_irqdomain(irqdomain_name);
if (!irqdomain) {
dev_err(&pdev->dev, "The IRQ domain %s does not exist\n",
irqdomain_name);
return -EINVAL;
}
kfree(irqdomain_name);
/* No need to lock_irq: we only protect count and continue unlocked */ /* No need to lock_irq: we only protect count and continue unlocked */
if (WR_IS_SWITCH) { if (WR_IS_SWITCH) {
...@@ -258,7 +196,7 @@ static int wrn_probe(struct platform_device *pdev) ...@@ -258,7 +196,7 @@ static int wrn_probe(struct platform_device *pdev)
tasklet_init(&wrn->rx_tlet, wrn_rx_interrupt, (unsigned long)wrn); tasklet_init(&wrn->rx_tlet, wrn_rx_interrupt, (unsigned long)wrn);
; ;
/* Map our interrupts */ /* Map our interrupts */
if( (err = __wrn_map_irq(pdev,irqdomain)) ) if( (err = __wrn_map_irq(pdev)) )
goto out; goto out;
/* Finally, register one interface per endpoint */ /* Finally, register one interface per endpoint */
......
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