scsi: cxlflash: Support AFU interrupt mapping and registration (a06b1cfc) · Commits · 戴 / test

drivers/scsi/cxlflash/ocxl_hw.c

+120 −0

Original line number	Diff line number	Diff line
		@@ -185,6 +185,124 @@ static int ocxlflash_process_element(void *ctx_cookie)
		return ctx->pe;
		}

		/**
		* 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.
		@@ -844,6 +962,8 @@ 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,

drivers/scsi/cxlflash/ocxl_hw.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -16,7 +16,9 @@

		struct ocxlflash_irqs {
		int hwirq;
		u32 virq;
		u64 ptrig;
		void __iomem *vtrig;
		};

		/* OCXL hardware AFU associated with the host */

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