diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-platform | 14 | ||||
| -rw-r--r-- | drivers/base/platform-msi.c | 20 |
2 files changed, 29 insertions, 5 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-platform b/Documentation/ABI/testing/sysfs-bus-platform index 194ca700e962..ff30728595ef 100644 --- a/Documentation/ABI/testing/sysfs-bus-platform +++ b/Documentation/ABI/testing/sysfs-bus-platform @@ -28,3 +28,17 @@ Description: value comes from an ACPI _PXM method or a similar firmware source. Initial users for this file would be devices like arm smmu which are populated by arm64 acpi_iort. + +What: /sys/bus/platform/devices/.../msi_irqs/ +Date: August 2021 +Contact: Barry Song <song.bao.hua@hisilicon.com> +Description: + The /sys/devices/.../msi_irqs directory contains a variable set + of files, with each file being named after a corresponding msi + irq vector allocated to that device. + +What: /sys/bus/platform/devices/.../msi_irqs/<N> +Date: August 2021 +Contact: Barry Song <song.bao.hua@hisilicon.com> +Description: + This attribute will show "msi" if <N> is a valid msi irq diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c index 0b72b134a304..3d6c8f9caf43 100644 --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -21,11 +21,12 @@ * and the callback to write the MSI message. */ struct platform_msi_priv_data { - struct device *dev; - void *host_data; - msi_alloc_info_t arg; - irq_write_msi_msg_t write_msg; - int devid; + struct device *dev; + void *host_data; + const struct attribute_group **msi_irq_groups; + msi_alloc_info_t arg; + irq_write_msi_msg_t write_msg; + int devid; }; /* The devid allocator */ @@ -272,8 +273,16 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, if (err) goto out_free_desc; + priv_data->msi_irq_groups = msi_populate_sysfs(dev); + if (IS_ERR(priv_data->msi_irq_groups)) { + err = PTR_ERR(priv_data->msi_irq_groups); + goto out_free_irqs; + } + return 0; +out_free_irqs: + msi_domain_free_irqs(dev->msi_domain, dev); out_free_desc: platform_msi_free_descs(dev, 0, nvec); out_free_priv_data: @@ -293,6 +302,7 @@ void platform_msi_domain_free_irqs(struct device *dev) struct msi_desc *desc; desc = first_msi_entry(dev); + msi_destroy_sysfs(dev, desc->platform.msi_priv_data->msi_irq_groups); platform_msi_free_priv_data(desc->platform.msi_priv_data); } |