From 5c9bf3635b66add7d829b4d8d538ae0d770d9d89 Mon Sep 17 00:00:00 2001 From: John Garry Date: Fri, 11 Mar 2022 20:23:49 +0800 Subject: [PATCH] scsi: libsas: Add sas_execute_internal_abort_single() The internal abort feature is common to hisi_sas and pm8001 HBAs, and the driver support is similar also, so add a common handler. Two modes of operation will be supported: - single: Abort a single tagged command - device: Abort all commands associated with a specific domain device A new protocol is added, SAS_PROTOCOL_INTERNAL_ABORT, so the common queue command API may be re-used. Only add "single" support as a first step. Link: https://lore.kernel.org/r/1647001432-239276-2-git-send-email-john.garry@huawei.com Tested-by: Damien Le Moal Acked-by: Jack Wang Signed-off-by: John Garry Signed-off-by: Martin K. Petersen --- drivers/scsi/libsas/sas_scsi_host.c | 74 +++++++++++++++++++++++++++++++++++++ include/scsi/libsas.h | 14 +++++++ include/scsi/sas.h | 2 + 3 files changed, 90 insertions(+) diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 5b5747e..bb6baa5 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -920,6 +920,80 @@ void sas_task_internal_timedout(struct timer_list *t) #define TASK_TIMEOUT (20 * HZ) #define TASK_RETRY 3 +static int sas_execute_internal_abort(struct domain_device *device, + enum sas_internal_abort type, u16 tag, + unsigned int qid, void *data) +{ + struct sas_ha_struct *ha = device->port->ha; + struct sas_internal *i = to_sas_internal(ha->core.shost->transportt); + struct sas_task *task = NULL; + int res, retry; + + for (retry = 0; retry < TASK_RETRY; retry++) { + task = sas_alloc_slow_task(GFP_KERNEL); + if (!task) + return -ENOMEM; + + task->dev = device; + task->task_proto = SAS_PROTOCOL_INTERNAL_ABORT; + task->task_done = sas_task_internal_done; + task->slow_task->timer.function = sas_task_internal_timedout; + task->slow_task->timer.expires = jiffies + TASK_TIMEOUT; + add_timer(&task->slow_task->timer); + + task->abort_task.tag = tag; + task->abort_task.type = type; + + res = i->dft->lldd_execute_task(task, GFP_KERNEL); + if (res) { + del_timer_sync(&task->slow_task->timer); + pr_err("Executing internal abort failed %016llx (%d)\n", + SAS_ADDR(device->sas_addr), res); + break; + } + + wait_for_completion(&task->slow_task->completion); + res = TMF_RESP_FUNC_FAILED; + + /* Even if the internal abort timed out, return direct. */ + if (task->task_state_flags & SAS_TASK_STATE_ABORTED) { + pr_err("Internal abort: timeout %016llx\n", + SAS_ADDR(device->sas_addr)); + res = -EIO; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == SAS_SAM_STAT_GOOD) { + res = TMF_RESP_FUNC_COMPLETE; + break; + } + + if (task->task_status.resp == SAS_TASK_COMPLETE && + task->task_status.stat == TMF_RESP_FUNC_SUCC) { + res = TMF_RESP_FUNC_SUCC; + break; + } + + pr_err("Internal abort: task to dev %016llx response: 0x%x status 0x%x\n", + SAS_ADDR(device->sas_addr), task->task_status.resp, + task->task_status.stat); + sas_free_task(task); + task = NULL; + } + BUG_ON(retry == TASK_RETRY && task != NULL); + sas_free_task(task); + return res; +} + +int sas_execute_internal_abort_single(struct domain_device *device, u16 tag, + unsigned int qid, void *data) +{ + return sas_execute_internal_abort(device, SAS_INTERNAL_ABORT_SINGLE, + tag, qid, data); +} +EXPORT_SYMBOL_GPL(sas_execute_internal_abort_single); + int sas_execute_tmf(struct domain_device *device, void *parameter, int para_len, int force_phy_id, struct sas_tmf_task *tmf) diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index df2c8fc..2d30d57 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -557,6 +557,16 @@ struct sas_ata_task { int force_phy_id; }; +/* LLDDs rely on these values */ +enum sas_internal_abort { + SAS_INTERNAL_ABORT_SINGLE = 0, +}; + +struct sas_internal_abort_task { + enum sas_internal_abort type; + u16 tag; +}; + struct sas_smp_task { struct scatterlist smp_req; struct scatterlist smp_resp; @@ -596,6 +606,7 @@ struct sas_task { struct sas_ata_task ata_task; struct sas_smp_task smp_task; struct sas_ssp_task ssp_task; + struct sas_internal_abort_task abort_task; }; struct scatterlist *scatter; @@ -683,6 +694,9 @@ extern int sas_slave_configure(struct scsi_device *); extern int sas_change_queue_depth(struct scsi_device *, int new_depth); extern int sas_bios_param(struct scsi_device *, struct block_device *, sector_t capacity, int *hsc); +int sas_execute_internal_abort_single(struct domain_device *device, + u16 tag, unsigned int qid, + void *data); extern struct scsi_transport_template * sas_domain_attach_transport(struct sas_domain_function_template *); extern struct device_attribute dev_attr_phy_event_threshold; diff --git a/include/scsi/sas.h b/include/scsi/sas.h index 332a463..acfc69f 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -95,6 +95,8 @@ enum sas_protocol { SAS_PROTOCOL_SSP = 0x08, SAS_PROTOCOL_ALL = 0x0E, SAS_PROTOCOL_STP_ALL = SAS_PROTOCOL_STP|SAS_PROTOCOL_SATA, + /* these are internal to libsas */ + SAS_PROTOCOL_INTERNAL_ABORT = 0x10, }; /* From the spec; local phys only */ -- 2.7.4