diff options
| author | Alex Elder <elder@linaro.org> | 2024-04-19 10:17:53 -0500 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2024-04-23 13:08:08 +0200 |
| commit | 2eca73444036ef5a3f55e209cb62baa7047f63b7 (patch) | |
| tree | d7d0ff2755c9a45af410307873a8199322e1e152 /drivers/net/ipa | |
| parent | 57f1591248bc90d879f34e3b4e85df382ca77f93 (diff) | |
net: ipa: maintain bitmap of suspend-enabled endpoints
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>
Diffstat (limited to 'drivers/net/ipa')
| -rw-r--r-- | drivers/net/ipa/ipa_interrupt.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c index 4d472f4b0002..18036e9cd161 100644 --- a/drivers/net/ipa/ipa_interrupt.c +++ b/drivers/net/ipa/ipa_interrupt.c @@ -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 */ |