diff options
Diffstat (limited to 'drivers/misc/cxl/main.c')
| -rw-r--r-- | drivers/misc/cxl/main.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c index 9fde75ed4fac..7ef5b4356942 100644 --- a/drivers/misc/cxl/main.c +++ b/drivers/misc/cxl/main.c @@ -32,6 +32,27 @@ uint cxl_verbose; module_param_named(verbose, cxl_verbose, uint, 0600); MODULE_PARM_DESC(verbose, "Enable verbose dmesg output"); +int cxl_afu_slbia(struct cxl_afu *afu) +{ + unsigned long timeout = jiffies + (HZ * CXL_TIMEOUT); + + pr_devel("cxl_afu_slbia issuing SLBIA command\n"); + cxl_p2n_write(afu, CXL_SLBIA_An, CXL_TLB_SLB_IQ_ALL); + while (cxl_p2n_read(afu, CXL_SLBIA_An) & CXL_TLB_SLB_P) { + if (time_after_eq(jiffies, timeout)) { + dev_warn(&afu->dev, "WARNING: CXL AFU SLBIA timed out!\n"); + return -EBUSY; + } + /* If the adapter has gone down, we can assume that we + * will PERST it and that will invalidate everything. + */ + if (!cxl_adapter_link_ok(afu->adapter)) + return -EIO; + cpu_relax(); + } + return 0; +} + static inline void _cxl_slbia(struct cxl_context *ctx, struct mm_struct *mm) { struct task_struct *task; @@ -174,6 +195,52 @@ void cxl_remove_adapter_nr(struct cxl *adapter) idr_remove(&cxl_adapter_idr, adapter->adapter_num); } +struct cxl *cxl_alloc_adapter(void) +{ + struct cxl *adapter; + + if (!(adapter = kzalloc(sizeof(struct cxl), GFP_KERNEL))) + return NULL; + + spin_lock_init(&adapter->afu_list_lock); + + if (cxl_alloc_adapter_nr(adapter)) + goto err1; + + if (dev_set_name(&adapter->dev, "card%i", adapter->adapter_num)) + goto err2; + + return adapter; + +err2: + cxl_remove_adapter_nr(adapter); +err1: + kfree(adapter); + return NULL; +} + +struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice) +{ + struct cxl_afu *afu; + + if (!(afu = kzalloc(sizeof(struct cxl_afu), GFP_KERNEL))) + return NULL; + + afu->adapter = adapter; + afu->dev.parent = &adapter->dev; + afu->dev.release = cxl_release_afu; + afu->slice = slice; + idr_init(&afu->contexts_idr); + mutex_init(&afu->contexts_lock); + spin_lock_init(&afu->afu_cntl_lock); + mutex_init(&afu->spa_mutex); + + afu->prefault_mode = CXL_PREFAULT_NONE; + afu->irqs_max = afu->adapter->user_irqs; + + return afu; +} + int cxl_afu_select_best_mode(struct cxl_afu *afu) { if (afu->modes_supported & CXL_MODE_DIRECTED) |
