@@ -186,6 +186,124 @@ static int ocxlflash_process_element(void *ctx_cookie)
}
/**
+ * afu_map_irq() - map the interrupt of the adapter context
+ * @flags: Flags.
+ * @ctx: Adapter context.
+ * @num: Per-context AFU interrupt number.
+ * @handler: Interrupt handler to register.
+ * @cookie: Interrupt handler private data.
+ * @name: Name of the interrupt.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int afu_map_irq(u64 flags, struct ocxlflash_context *ctx, int num,
+ irq_handler_t handler, void *cookie, char *name)
+{
+ struct ocxl_hw_afu *afu = ctx->hw_afu;
+ struct device *dev = afu->dev;
+ struct ocxlflash_irqs *irq;
+ void __iomem *vtrig;
+ u32 virq;
+ int rc = 0;
+
+ if (num < 0 || num >= ctx->num_irqs) {
+ dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
+ rc = -ENOENT;
+ goto out;
+ }
+
+ irq = &ctx->irqs[num];
+ virq = irq_create_mapping(NULL, irq->hwirq);
+ if (unlikely(!virq)) {
+ dev_err(dev, "%s: irq_create_mapping failed\n", __func__);
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = request_irq(virq, handler, 0, name, cookie);
+ if (unlikely(rc)) {
+ dev_err(dev, "%s: request_irq failed rc=%d\n", __func__, rc);
+ goto err1;
+ }
+
+ vtrig = ioremap(irq->ptrig, PAGE_SIZE);
+ if (unlikely(!vtrig)) {
+ dev_err(dev, "%s: Trigger page mapping failed\n", __func__);
+ rc = -ENOMEM;
+ goto err2;
+ }
+
+ irq->virq = virq;
+ irq->vtrig = vtrig;
+out:
+ return rc;
+err2:
+ free_irq(virq, cookie);
+err1:
+ irq_dispose_mapping(virq);
+ goto out;
+}
+
+/**
+ * ocxlflash_map_afu_irq() - map the interrupt of the adapter context
+ * @ctx_cookie: Adapter context.
+ * @num: Per-context AFU interrupt number.
+ * @handler: Interrupt handler to register.
+ * @cookie: Interrupt handler private data.
+ * @name: Name of the interrupt.
+ *
+ * Return: 0 on success, -errno on failure
+ */
+static int ocxlflash_map_afu_irq(void *ctx_cookie, int num,
+ irq_handler_t handler, void *cookie,
+ char *name)
+{
+ return afu_map_irq(0, ctx_cookie, num, handler, cookie, name);
+}
+
+/**
+ * afu_unmap_irq() - unmap the interrupt
+ * @flags: Flags.
+ * @ctx: Adapter context.
+ * @num: Per-context AFU interrupt number.
+ * @cookie: Interrupt handler private data.
+ */
+static void afu_unmap_irq(u64 flags, struct ocxlflash_context *ctx, int num,
+ void *cookie)
+{
+ struct ocxl_hw_afu *afu = ctx->hw_afu;
+ struct device *dev = afu->dev;
+ struct ocxlflash_irqs *irq;
+
+ if (num < 0 || num >= ctx->num_irqs) {
+ dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
+ return;
+ }
+
+ irq = &ctx->irqs[num];
+ if (irq->vtrig)
+ iounmap(irq->vtrig);
+
+ if (irq_find_mapping(NULL, irq->hwirq)) {
+ free_irq(irq->virq, cookie);
+ irq_dispose_mapping(irq->virq);
+ }
+
+ memset(irq, 0, sizeof(*irq));
+}
+
+/**
+ * ocxlflash_unmap_afu_irq() - unmap the interrupt
+ * @ctx_cookie: Adapter context.
+ * @num: Per-context AFU interrupt number.
+ * @cookie: Interrupt handler private data.
+ */
+static void ocxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie)
+{
+ return afu_unmap_irq(0, ctx_cookie, num, cookie);
+}
+
+/**
* start_context() - local routine to start a context
* @ctx: Adapter context to be started.
*
@@ -836,6 +954,8 @@ const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
.psa_map = ocxlflash_psa_map,
.psa_unmap = ocxlflash_psa_unmap,
.process_element = ocxlflash_process_element,
+ .map_afu_irq = ocxlflash_map_afu_irq,
+ .unmap_afu_irq = ocxlflash_unmap_afu_irq,
.start_context = ocxlflash_start_context,
.stop_context = ocxlflash_stop_context,
.set_master = ocxlflash_set_master,
@@ -16,7 +16,9 @@
struct ocxlflash_irqs {
int hwirq;
+ u32 virq;
u64 ptrig;
+ void __iomem *vtrig;
};
/* OCXL hardware AFU associated with the host */