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net: ipa: maintain bitmap of suspend-enabled endpoints

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Keep track of which endpoints have the SUSPEND IPA interrupt enabled
in a variable-length bitmap.  This will be used in the next patch to
allow the SUSPEND interrupt type to be disabled except when needed.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Alex Elder 2024-04-19 10:17:53 -05:00 committed by Paolo Abeni
parent 57f1591248
commit 2eca734440
1 changed files with 17 additions and 2 deletions
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19
drivers/net/ipa/ipa_interrupt.c
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@ -37,11 +37,13 @@
* @ipa: IPA pointer
* @irq: Linux IRQ number used for IPA interrupts
* @enabled: Mask indicating which interrupts are enabled
* @suspend_enabled: Bitmap of endpoints with the SUSPEND interrupt enabled
*/
struct ipa_interrupt {
struct ipa *ipa;
u32 irq;
u32 enabled;
unsigned long *suspend_enabled;
};
/* Clear the suspend interrupt for all endpoints that signaled it */
@ -211,6 +213,7 @@ static void ipa_interrupt_suspend_control(struct ipa_interrupt *interrupt,
val |= mask;
else
val &= ~mask;
__change_bit(endpoint_id, interrupt->suspend_enabled);
iowrite32(val, ipa->reg_virt + offset);
}
@ -246,7 +249,16 @@ int ipa_interrupt_config(struct ipa *ipa)
interrupt->ipa = ipa;
/* Disable all IPA interrupt types */
/* Initially all IPA interrupt types are disabled */
interrupt->enabled = 0;
interrupt->suspend_enabled = bitmap_zalloc(ipa->endpoint_count,
GFP_KERNEL);
if (!interrupt->suspend_enabled) {
ret = -ENOMEM;
goto err_kfree;
}
/* Disable IPA interrupt types */
reg = ipa_reg(ipa, IPA_IRQ_EN);
iowrite32(0, ipa->reg_virt + reg_offset(reg));
@ -254,7 +266,7 @@ int ipa_interrupt_config(struct ipa *ipa)
"ipa", interrupt);
if (ret) {
dev_err(dev, "error %d requesting \"ipa\" IRQ\n", ret);
goto err_kfree;
goto err_free_bitmap;
}
ret = dev_pm_set_wake_irq(dev, irq);
@ -270,6 +282,8 @@ int ipa_interrupt_config(struct ipa *ipa)
err_free_irq:
free_irq(interrupt->irq, interrupt);
err_free_bitmap:
bitmap_free(interrupt->suspend_enabled);
err_kfree:
kfree(interrupt);
@ -286,6 +300,7 @@ void ipa_interrupt_deconfig(struct ipa *ipa)
dev_pm_clear_wake_irq(dev);
free_irq(interrupt->irq, interrupt);
bitmap_free(interrupt->suspend_enabled);
}
/* Initialize the IPA interrupt structure */