scsi: cxlflash: Adapter context support for OCXL (f6b4557c) · Commits · 戴 / test

drivers/scsi/cxlflash/ocxl_hw.c

+90 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,80 @@
		#include "backend.h"
		#include "ocxl_hw.h"

		/**
		* ocxlflash_set_master() - sets the context as master
		* @ctx_cookie: Adapter context to set as master.
		*/
		static void ocxlflash_set_master(void *ctx_cookie)
		{
		struct ocxlflash_context *ctx = ctx_cookie;

		ctx->master = true;
		}

		/**
		* ocxlflash_get_context() - obtains the context associated with the host
		* @pdev: PCI device associated with the host.
		* @afu_cookie: Hardware AFU associated with the host.
		*
		* Return: returns the pointer to host adapter context
		*/
		static void ocxlflash_get_context(struct pci_dev pdev, void *afu_cookie)
		{
		struct ocxl_hw_afu *afu = afu_cookie;

		return afu->ocxl_ctx;
		}

		/**
		* ocxlflash_dev_context_init() - allocate and initialize an adapter context
		* @pdev: PCI device associated with the host.
		* @afu_cookie: Hardware AFU associated with the host.
		*
		* Return: returns the adapter context on success, ERR_PTR on failure
		*/
		static void ocxlflash_dev_context_init(struct pci_dev pdev, void *afu_cookie)
		{
		struct ocxl_hw_afu *afu = afu_cookie;
		struct device *dev = afu->dev;
		struct ocxlflash_context *ctx;
		int rc;

		ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
		if (unlikely(!ctx)) {
		dev_err(dev, "%s: Context allocation failed\n", __func__);
		rc = -ENOMEM;
		goto err;
		}

		ctx->master = false;
		ctx->hw_afu = afu;
		out:
		return ctx;
		err:
		ctx = ERR_PTR(rc);
		goto out;
		}

		/**
		* ocxlflash_release_context() - releases an adapter context
		* @ctx_cookie: Adapter context to be released.
		*
		* Return: 0 on success, -errno on failure
		*/
		static int ocxlflash_release_context(void *ctx_cookie)
		{
		struct ocxlflash_context *ctx = ctx_cookie;
		int rc = 0;

		if (!ctx)
		goto out;

		kfree(ctx);
		out:
		return rc;
		}

		/**
		* ocxlflash_destroy_afu() - destroy the AFU structure
		* @afu_cookie: AFU to be freed.
		@@ -28,6 +102,7 @@ static void ocxlflash_destroy_afu(void *afu_cookie)
		if (!afu)
		return;

		ocxlflash_release_context(afu->ocxl_ctx);
		kfree(afu);
		}

		@@ -134,6 +209,7 @@ out:
		static void ocxlflash_create_afu(struct pci_dev pdev)
		{
		struct device *dev = &pdev->dev;
		struct ocxlflash_context *ctx;
		struct ocxl_hw_afu *afu;
		int rc;

		@@ -159,6 +235,16 @@ static void ocxlflash_create_afu(struct pci_dev pdev)
		__func__, rc);
		goto err1;
		}

		ctx = ocxlflash_dev_context_init(pdev, afu);
		if (IS_ERR(ctx)) {
		rc = PTR_ERR(ctx);
		dev_err(dev, "%s: ocxlflash_dev_context_init failed rc=%d\n",
		__func__, rc);
		goto err1;
		}

		afu->ocxl_ctx = ctx;
		out:
		return afu;
		err1:
		@@ -170,6 +256,10 @@ err1:
		/* Backend ops to ocxlflash services */
		const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
		.module = THIS_MODULE,
		.set_master = ocxlflash_set_master,
		.get_context = ocxlflash_get_context,
		.dev_context_init = ocxlflash_dev_context_init,
		.release_context = ocxlflash_release_context,
		.create_afu = ocxlflash_create_afu,
		.destroy_afu = ocxlflash_destroy_afu,
		};

drivers/scsi/cxlflash/ocxl_hw.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@

		/* 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 */

		@@ -28,3 +29,8 @@ struct ocxl_hw_afu {
		int max_pasid; /* Maximum number of contexts */
		bool is_present; /* Function has AFUs defined */
		};

		struct ocxlflash_context {
		struct ocxl_hw_afu hw_afu; / HW AFU back pointer */
		bool master; /* Whether this is a master context */
		};

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