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Diffstat (limited to 'drivers/scsi/cxlflash/ocxl_hw.h')
-rw-r--r--drivers/scsi/cxlflash/ocxl_hw.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/scsi/cxlflash/ocxl_hw.h b/drivers/scsi/cxlflash/ocxl_hw.h
new file mode 100644
index 000000000..f2fe88816
--- /dev/null
+++ b/drivers/scsi/cxlflash/ocxl_hw.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * CXL Flash Device Driver
+ *
+ * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
+ * Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
+ *
+ * Copyright (C) 2018 IBM Corporation
+ */
+
+#define OCXL_MAX_IRQS 4 /* Max interrupts per process */
+
+struct ocxlflash_irqs {
+ int hwirq;
+ u32 virq;
+ void __iomem *vtrig;
+};
+
+/* OCXL hardware AFU associated with the host */
+struct ocxl_hw_afu {
+ struct ocxlflash_context *ocxl_ctx; /* Host context */
+ struct pci_dev *pdev; /* PCI device */
+ struct device *dev; /* Generic device */
+ bool perst_same_image; /* Same image loaded on perst */
+
+ struct ocxl_fn_config fcfg; /* DVSEC config of the function */
+ struct ocxl_afu_config acfg; /* AFU configuration data */
+
+ int fn_actag_base; /* Function acTag base */
+ int fn_actag_enabled; /* Function acTag number enabled */
+ int afu_actag_base; /* AFU acTag base */
+ int afu_actag_enabled; /* AFU acTag number enabled */
+
+ phys_addr_t ppmmio_phys; /* Per process MMIO space */
+ phys_addr_t gmmio_phys; /* Global AFU MMIO space */
+ void __iomem *gmmio_virt; /* Global MMIO map */
+
+ void *link_token; /* Link token for the SPA */
+ struct idr idr; /* IDR to manage contexts */
+ int max_pasid; /* Maximum number of contexts */
+ bool is_present; /* Function has AFUs defined */
+};
+
+enum ocxlflash_ctx_state {
+ CLOSED,
+ OPENED,
+ STARTED
+};
+
+struct ocxlflash_context {
+ struct ocxl_hw_afu *hw_afu; /* HW AFU back pointer */
+ struct address_space *mapping; /* Mapping for pseudo filesystem */
+ bool master; /* Whether this is a master context */
+ int pe; /* Process element */
+
+ phys_addr_t psn_phys; /* Process mapping */
+ u64 psn_size; /* Process mapping size */
+
+ spinlock_t slock; /* Protects irq/fault/event updates */
+ wait_queue_head_t wq; /* Wait queue for poll and interrupts */
+ struct mutex state_mutex; /* Mutex to update context state */
+ enum ocxlflash_ctx_state state; /* Context state */
+
+ struct ocxlflash_irqs *irqs; /* Pointer to array of structures */
+ int num_irqs; /* Number of interrupts */
+ bool pending_irq; /* Pending interrupt on the context */
+ ulong irq_bitmap; /* Bits indicating pending irq num */
+
+ u64 fault_addr; /* Address that triggered the fault */
+ u64 fault_dsisr; /* Value of dsisr register at fault */
+ bool pending_fault; /* Pending translation fault */
+};