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[67.161.114.176]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-70242c270c7sm6298153b3a.220.2024.06.03.22.10.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 22:10:39 -0700 (PDT) From: mhkelley58@gmail.com X-Google-Original-From: mhklinux@outlook.com To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, arnd@arndb.de, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arch@vger.kernel.org Cc: maz@kernel.org, den@valinux.co.jp, jgowans@amazon.com, dawei.li@shingroup.cn Subject: [RFC 03/12] Drivers: hv: vmbus: Add an IRQ name to VMBus channels Date: Mon, 3 Jun 2024 22:09:31 -0700 Message-Id: <20240604050940.859909-4-mhklinux@outlook.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240604050940.859909-1-mhklinux@outlook.com> References: <20240604050940.859909-1-mhklinux@outlook.com> Reply-To: mhklinux@outlook.com Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Michael Kelley In preparation for assigning Linux IRQs to VMBus channels, assign a string name to each channel. The name is used when the IRQ is requested, and it will appear in the output of /proc/interrupts to make it easier to identify the device the IRQ is associated with. Many VMBus devices are single-instance, with a single channel. For such devices, a default string name can be determined based on the GUID identifying the device. So add default names to the vmbus_devs table that lists recognized devices. When a channel is created, set the channel name to that default so a reasonable name is displayed without requiring VMBus driver modifications. However, individual VMBus device drivers may be optionally modified to override the default name to provide additional information. In cases where a driver supports multiple instances of a device, or a device has multiple channels, the additional information may be helpful to display in /proc/interrupts. Signed-off-by: Michael Kelley --- drivers/hv/channel_mgmt.c | 45 +++++++++++++++++++++++++++++++-------- include/linux/hyperv.h | 5 +++++ 2 files changed, 41 insertions(+), 9 deletions(-) diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c index a216a0aede73..adbe184e5197 100644 --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include @@ -33,6 +34,7 @@ const struct vmbus_device vmbus_devs[] = { HV_IDE_GUID, .perf_device = true, .allowed_in_isolated = false, + .irq_name = "storvsc", }, /* SCSI */ @@ -40,6 +42,7 @@ const struct vmbus_device vmbus_devs[] = { HV_SCSI_GUID, .perf_device = true, .allowed_in_isolated = true, + .irq_name = "storvsc", }, /* Fibre Channel */ @@ -47,6 +50,7 @@ const struct vmbus_device vmbus_devs[] = { HV_SYNTHFC_GUID, .perf_device = true, .allowed_in_isolated = false, + .irq_name = "storvsc", }, /* Synthetic NIC */ @@ -54,6 +58,7 @@ const struct vmbus_device vmbus_devs[] = { HV_NIC_GUID, .perf_device = true, .allowed_in_isolated = true, + .irq_name = "netvsc", }, /* Network Direct */ @@ -61,6 +66,7 @@ const struct vmbus_device vmbus_devs[] = { HV_ND_GUID, .perf_device = true, .allowed_in_isolated = false, + .irq_name = "netdirect", }, /* PCIE */ @@ -68,6 +74,7 @@ const struct vmbus_device vmbus_devs[] = { HV_PCIE_GUID, .perf_device = false, .allowed_in_isolated = true, + .irq_name = "vpci", }, /* Synthetic Frame Buffer */ @@ -75,6 +82,7 @@ const struct vmbus_device vmbus_devs[] = { HV_SYNTHVID_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "framebuffer", }, /* Synthetic Keyboard */ @@ -82,6 +90,7 @@ const struct vmbus_device vmbus_devs[] = { HV_KBD_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "keyboard", }, /* Synthetic MOUSE */ @@ -89,6 +98,7 @@ const struct vmbus_device vmbus_devs[] = { HV_MOUSE_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "mouse", }, /* KVP */ @@ -96,6 +106,7 @@ const struct vmbus_device vmbus_devs[] = { HV_KVP_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "kvp", }, /* Time Synch */ @@ -103,6 +114,7 @@ const struct vmbus_device vmbus_devs[] = { HV_TS_GUID, .perf_device = false, .allowed_in_isolated = true, + .irq_name = "timesync", }, /* Heartbeat */ @@ -110,6 +122,7 @@ const struct vmbus_device vmbus_devs[] = { HV_HEART_BEAT_GUID, .perf_device = false, .allowed_in_isolated = true, + .irq_name = "heartbeat", }, /* Shutdown */ @@ -117,6 +130,7 @@ const struct vmbus_device vmbus_devs[] = { HV_SHUTDOWN_GUID, .perf_device = false, .allowed_in_isolated = true, + .irq_name = "shutdown", }, /* File copy */ @@ -126,6 +140,7 @@ const struct vmbus_device vmbus_devs[] = { HV_FCOPY_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "fcopy", }, /* Backup */ @@ -133,6 +148,7 @@ const struct vmbus_device vmbus_devs[] = { HV_VSS_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "vss", }, /* Dynamic Memory */ @@ -140,6 +156,7 @@ const struct vmbus_device vmbus_devs[] = { HV_DM_GUID, .perf_device = false, .allowed_in_isolated = false, + .irq_name = "balloon", }, /* @@ -198,20 +215,30 @@ static bool is_unsupported_vmbus_devs(const guid_t *guid) return false; } -static u16 hv_get_dev_type(const struct vmbus_channel *channel) +static void hv_set_dev_type_and_irq_name(struct vmbus_channel *channel) { const guid_t *guid = &channel->offermsg.offer.if_type; + char *name = NULL; u16 i; - if (is_hvsock_channel(channel)) - return HV_UNKNOWN; - - for (i = HV_IDE; i < HV_UNKNOWN; i++) { - if (guid_equal(guid, &vmbus_devs[i].guid)) - return i; + if (is_hvsock_channel(channel)) { + i = HV_UNKNOWN; + name = "hv_sock"; + goto found; } + + for (i = HV_IDE; i < HV_UNKNOWN; i++) + if (guid_equal(guid, &vmbus_devs[i].guid)) { + name = vmbus_devs[i].irq_name; + goto found; + } + pr_info("Unknown GUID: %pUl\n", guid); - return i; + +found: + channel->device_id = i; + if (name) + strscpy(channel->irq_name, name, VMBUS_CHAN_IRQ_NAME_MAX); } /** @@ -970,7 +997,7 @@ static void vmbus_setup_channel_state(struct vmbus_channel *channel, sizeof(struct vmbus_channel_offer_channel)); channel->monitor_grp = (u8)offer->monitorid / 32; channel->monitor_bit = (u8)offer->monitorid % 32; - channel->device_id = hv_get_dev_type(channel); + hv_set_dev_type_and_irq_name(channel); } /* diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h index d52c916cc492..897d96fa19d4 100644 --- a/include/linux/hyperv.h +++ b/include/linux/hyperv.h @@ -826,6 +826,7 @@ struct vmbus_device { guid_t guid; bool perf_device; bool allowed_in_isolated; + char *irq_name; }; #define VMBUS_DEFAULT_MAX_PKT_SIZE 4096 @@ -837,6 +838,8 @@ struct vmbus_gpadl { bool decrypted; }; +#define VMBUS_CHAN_IRQ_NAME_MAX 32 + struct vmbus_channel { struct list_head listentry; @@ -1068,6 +1071,8 @@ struct vmbus_channel { /* The max size of a packet on this channel */ u32 max_pkt_size; + + char irq_name[VMBUS_CHAN_IRQ_NAME_MAX]; }; #define lock_requestor(channel, flags) \