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![Linus Torvalds](/assets/img/avatar_default.png)
This is mostly updates to the usual drivers: mpt3sas, lpfc, qla2xxx, hisi_sas, smartpqi, megaraid_sas, arcmsr. In addition, with the continuing absence of Nic we have target updates for tcmu and target core (all with reviews and acks). The biggest observable change is going to be that we're (again) trying to switch to mulitqueue as the default (a user can still override the setting on the kernel command line). Other major core stuff is the removal of the remaining Microchannel drivers, an update of the internal timers and some reworks of completion and result handling. Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCW3R3niYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishauRAP4yfBKK dbxF81c/Bxi/Stk16FWkOOrjs4CizwmnMcpM5wD/UmM9o6ebDzaYpZgA8wIl7X/N o/JckEZZpIp+5NySZNc= =ggLB -----END PGP SIGNATURE----- Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI updates from James Bottomley: "This is mostly updates to the usual drivers: mpt3sas, lpfc, qla2xxx, hisi_sas, smartpqi, megaraid_sas, arcmsr. In addition, with the continuing absence of Nic we have target updates for tcmu and target core (all with reviews and acks). The biggest observable change is going to be that we're (again) trying to switch to mulitqueue as the default (a user can still override the setting on the kernel command line). Other major core stuff is the removal of the remaining Microchannel drivers, an update of the internal timers and some reworks of completion and result handling" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (203 commits) scsi: core: use blk_mq_run_hw_queues in scsi_kick_queue scsi: ufs: remove unnecessary query(DM) UPIU trace scsi: qla2xxx: Fix issue reported by static checker for qla2x00_els_dcmd2_sp_done() scsi: aacraid: Spelling fix in comment scsi: mpt3sas: Fix calltrace observed while running IO & reset scsi: aic94xx: fix an error code in aic94xx_init() scsi: st: remove redundant pointer STbuffer scsi: qla2xxx: Update driver version to 10.00.00.08-k scsi: qla2xxx: Migrate NVME N2N handling into state machine scsi: qla2xxx: Save frame payload size from ICB scsi: qla2xxx: Fix stalled relogin scsi: qla2xxx: Fix race between switch cmd completion and timeout scsi: qla2xxx: Fix Management Server NPort handle reservation logic scsi: qla2xxx: Flush mailbox commands on chip reset scsi: qla2xxx: Fix unintended Logout scsi: qla2xxx: Fix session state stuck in Get Port DB scsi: qla2xxx: Fix redundant fc_rport registration scsi: qla2xxx: Silent erroneous message scsi: qla2xxx: Prevent sysfs access when chip is down scsi: qla2xxx: Add longer window for chip reset ...
1418 lines
34 KiB
C
1418 lines
34 KiB
C
/*
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* CXL Flash Device Driver
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*
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* Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
|
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* Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
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*
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* Copyright (C) 2018 IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/file.h>
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#include <linux/idr.h>
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/poll.h>
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#include <linux/sched/signal.h>
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#include <misc/ocxl.h>
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#include <uapi/misc/cxl.h>
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#include "backend.h"
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#include "ocxl_hw.h"
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/*
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* Pseudo-filesystem to allocate inodes.
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*/
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#define OCXLFLASH_FS_MAGIC 0x1697698f
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static int ocxlflash_fs_cnt;
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static struct vfsmount *ocxlflash_vfs_mount;
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static const struct dentry_operations ocxlflash_fs_dops = {
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.d_dname = simple_dname,
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};
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/*
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* ocxlflash_fs_mount() - mount the pseudo-filesystem
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* @fs_type: File system type.
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* @flags: Flags for the filesystem.
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* @dev_name: Device name associated with the filesystem.
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* @data: Data pointer.
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*
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* Return: pointer to the directory entry structure
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*/
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static struct dentry *ocxlflash_fs_mount(struct file_system_type *fs_type,
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int flags, const char *dev_name,
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void *data)
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{
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return mount_pseudo(fs_type, "ocxlflash:", NULL, &ocxlflash_fs_dops,
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OCXLFLASH_FS_MAGIC);
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}
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static struct file_system_type ocxlflash_fs_type = {
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.name = "ocxlflash",
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.owner = THIS_MODULE,
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.mount = ocxlflash_fs_mount,
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.kill_sb = kill_anon_super,
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};
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/*
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* ocxlflash_release_mapping() - release the memory mapping
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* @ctx: Context whose mapping is to be released.
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*/
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static void ocxlflash_release_mapping(struct ocxlflash_context *ctx)
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{
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if (ctx->mapping)
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simple_release_fs(&ocxlflash_vfs_mount, &ocxlflash_fs_cnt);
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ctx->mapping = NULL;
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}
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/*
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* ocxlflash_getfile() - allocate pseudo filesystem, inode, and the file
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* @dev: Generic device of the host.
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* @name: Name of the pseudo filesystem.
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* @fops: File operations.
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* @priv: Private data.
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* @flags: Flags for the file.
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*
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* Return: pointer to the file on success, ERR_PTR on failure
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*/
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static struct file *ocxlflash_getfile(struct device *dev, const char *name,
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const struct file_operations *fops,
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void *priv, int flags)
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{
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struct file *file;
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struct inode *inode;
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int rc;
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if (fops->owner && !try_module_get(fops->owner)) {
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dev_err(dev, "%s: Owner does not exist\n", __func__);
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rc = -ENOENT;
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goto err1;
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}
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rc = simple_pin_fs(&ocxlflash_fs_type, &ocxlflash_vfs_mount,
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&ocxlflash_fs_cnt);
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if (unlikely(rc < 0)) {
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dev_err(dev, "%s: Cannot mount ocxlflash pseudofs rc=%d\n",
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__func__, rc);
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goto err2;
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}
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inode = alloc_anon_inode(ocxlflash_vfs_mount->mnt_sb);
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if (IS_ERR(inode)) {
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rc = PTR_ERR(inode);
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dev_err(dev, "%s: alloc_anon_inode failed rc=%d\n",
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__func__, rc);
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goto err3;
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}
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file = alloc_file_pseudo(inode, ocxlflash_vfs_mount, name,
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flags & (O_ACCMODE | O_NONBLOCK), fops);
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if (IS_ERR(file)) {
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rc = PTR_ERR(file);
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dev_err(dev, "%s: alloc_file failed rc=%d\n",
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__func__, rc);
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goto err4;
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}
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file->private_data = priv;
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out:
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return file;
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err4:
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iput(inode);
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err3:
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simple_release_fs(&ocxlflash_vfs_mount, &ocxlflash_fs_cnt);
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err2:
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module_put(fops->owner);
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err1:
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file = ERR_PTR(rc);
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goto out;
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}
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/**
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* ocxlflash_psa_map() - map the process specific MMIO space
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* @ctx_cookie: Adapter context for which the mapping needs to be done.
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*
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* Return: MMIO pointer of the mapped region
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*/
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static void __iomem *ocxlflash_psa_map(void *ctx_cookie)
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{
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struct ocxlflash_context *ctx = ctx_cookie;
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struct device *dev = ctx->hw_afu->dev;
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mutex_lock(&ctx->state_mutex);
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if (ctx->state != STARTED) {
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dev_err(dev, "%s: Context not started, state=%d\n", __func__,
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ctx->state);
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mutex_unlock(&ctx->state_mutex);
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return NULL;
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}
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mutex_unlock(&ctx->state_mutex);
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return ioremap(ctx->psn_phys, ctx->psn_size);
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}
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/**
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* ocxlflash_psa_unmap() - unmap the process specific MMIO space
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* @addr: MMIO pointer to unmap.
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*/
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static void ocxlflash_psa_unmap(void __iomem *addr)
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{
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iounmap(addr);
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}
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/**
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* ocxlflash_process_element() - get process element of the adapter context
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* @ctx_cookie: Adapter context associated with the process element.
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*
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* Return: process element of the adapter context
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*/
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static int ocxlflash_process_element(void *ctx_cookie)
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{
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struct ocxlflash_context *ctx = ctx_cookie;
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return ctx->pe;
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}
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/**
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* afu_map_irq() - map the interrupt of the adapter context
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* @flags: Flags.
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* @ctx: Adapter context.
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* @num: Per-context AFU interrupt number.
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* @handler: Interrupt handler to register.
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* @cookie: Interrupt handler private data.
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* @name: Name of the interrupt.
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*
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* Return: 0 on success, -errno on failure
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*/
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static int afu_map_irq(u64 flags, struct ocxlflash_context *ctx, int num,
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irq_handler_t handler, void *cookie, char *name)
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{
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struct ocxl_hw_afu *afu = ctx->hw_afu;
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struct device *dev = afu->dev;
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struct ocxlflash_irqs *irq;
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void __iomem *vtrig;
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u32 virq;
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int rc = 0;
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if (num < 0 || num >= ctx->num_irqs) {
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dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
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rc = -ENOENT;
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goto out;
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}
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irq = &ctx->irqs[num];
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virq = irq_create_mapping(NULL, irq->hwirq);
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if (unlikely(!virq)) {
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dev_err(dev, "%s: irq_create_mapping failed\n", __func__);
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rc = -ENOMEM;
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goto out;
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}
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rc = request_irq(virq, handler, 0, name, cookie);
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if (unlikely(rc)) {
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dev_err(dev, "%s: request_irq failed rc=%d\n", __func__, rc);
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goto err1;
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}
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vtrig = ioremap(irq->ptrig, PAGE_SIZE);
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if (unlikely(!vtrig)) {
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dev_err(dev, "%s: Trigger page mapping failed\n", __func__);
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rc = -ENOMEM;
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goto err2;
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}
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irq->virq = virq;
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irq->vtrig = vtrig;
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out:
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return rc;
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err2:
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free_irq(virq, cookie);
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err1:
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irq_dispose_mapping(virq);
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goto out;
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}
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/**
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* ocxlflash_map_afu_irq() - map the interrupt of the adapter context
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* @ctx_cookie: Adapter context.
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* @num: Per-context AFU interrupt number.
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* @handler: Interrupt handler to register.
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* @cookie: Interrupt handler private data.
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* @name: Name of the interrupt.
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*
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* Return: 0 on success, -errno on failure
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*/
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static int ocxlflash_map_afu_irq(void *ctx_cookie, int num,
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irq_handler_t handler, void *cookie,
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char *name)
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{
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return afu_map_irq(0, ctx_cookie, num, handler, cookie, name);
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}
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/**
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* afu_unmap_irq() - unmap the interrupt
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* @flags: Flags.
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* @ctx: Adapter context.
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* @num: Per-context AFU interrupt number.
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* @cookie: Interrupt handler private data.
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*/
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static void afu_unmap_irq(u64 flags, struct ocxlflash_context *ctx, int num,
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void *cookie)
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{
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struct ocxl_hw_afu *afu = ctx->hw_afu;
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struct device *dev = afu->dev;
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struct ocxlflash_irqs *irq;
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if (num < 0 || num >= ctx->num_irqs) {
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dev_err(dev, "%s: Interrupt %d not allocated\n", __func__, num);
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return;
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}
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irq = &ctx->irqs[num];
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if (irq->vtrig)
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iounmap(irq->vtrig);
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if (irq_find_mapping(NULL, irq->hwirq)) {
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free_irq(irq->virq, cookie);
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irq_dispose_mapping(irq->virq);
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}
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memset(irq, 0, sizeof(*irq));
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}
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/**
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* ocxlflash_unmap_afu_irq() - unmap the interrupt
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* @ctx_cookie: Adapter context.
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* @num: Per-context AFU interrupt number.
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* @cookie: Interrupt handler private data.
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*/
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static void ocxlflash_unmap_afu_irq(void *ctx_cookie, int num, void *cookie)
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{
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return afu_unmap_irq(0, ctx_cookie, num, cookie);
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}
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/**
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* ocxlflash_get_irq_objhndl() - get the object handle for an interrupt
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* @ctx_cookie: Context associated with the interrupt.
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* @irq: Interrupt number.
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*
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* Return: effective address of the mapped region
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*/
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static u64 ocxlflash_get_irq_objhndl(void *ctx_cookie, int irq)
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{
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struct ocxlflash_context *ctx = ctx_cookie;
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|
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if (irq < 0 || irq >= ctx->num_irqs)
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return 0;
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return (__force u64)ctx->irqs[irq].vtrig;
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}
|
|
|
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/**
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* ocxlflash_xsl_fault() - callback when translation error is triggered
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* @data: Private data provided at callback registration, the context.
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* @addr: Address that triggered the error.
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* @dsisr: Value of dsisr register.
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*/
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static void ocxlflash_xsl_fault(void *data, u64 addr, u64 dsisr)
|
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{
|
|
struct ocxlflash_context *ctx = data;
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|
|
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spin_lock(&ctx->slock);
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ctx->fault_addr = addr;
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ctx->fault_dsisr = dsisr;
|
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ctx->pending_fault = true;
|
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spin_unlock(&ctx->slock);
|
|
|
|
wake_up_all(&ctx->wq);
|
|
}
|
|
|
|
/**
|
|
* start_context() - local routine to start a context
|
|
* @ctx: Adapter context to be started.
|
|
*
|
|
* Assign the context specific MMIO space, add and enable the PE.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int start_context(struct ocxlflash_context *ctx)
|
|
{
|
|
struct ocxl_hw_afu *afu = ctx->hw_afu;
|
|
struct ocxl_afu_config *acfg = &afu->acfg;
|
|
void *link_token = afu->link_token;
|
|
struct device *dev = afu->dev;
|
|
bool master = ctx->master;
|
|
struct mm_struct *mm;
|
|
int rc = 0;
|
|
u32 pid;
|
|
|
|
mutex_lock(&ctx->state_mutex);
|
|
if (ctx->state != OPENED) {
|
|
dev_err(dev, "%s: Context state invalid, state=%d\n",
|
|
__func__, ctx->state);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (master) {
|
|
ctx->psn_size = acfg->global_mmio_size;
|
|
ctx->psn_phys = afu->gmmio_phys;
|
|
} else {
|
|
ctx->psn_size = acfg->pp_mmio_stride;
|
|
ctx->psn_phys = afu->ppmmio_phys + (ctx->pe * ctx->psn_size);
|
|
}
|
|
|
|
/* pid and mm not set for master contexts */
|
|
if (master) {
|
|
pid = 0;
|
|
mm = NULL;
|
|
} else {
|
|
pid = current->mm->context.id;
|
|
mm = current->mm;
|
|
}
|
|
|
|
rc = ocxl_link_add_pe(link_token, ctx->pe, pid, 0, 0, mm,
|
|
ocxlflash_xsl_fault, ctx);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_link_add_pe failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
ctx->state = STARTED;
|
|
out:
|
|
mutex_unlock(&ctx->state_mutex);
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_start_context() - start a kernel context
|
|
* @ctx_cookie: Adapter context to be started.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_start_context(void *ctx_cookie)
|
|
{
|
|
struct ocxlflash_context *ctx = ctx_cookie;
|
|
|
|
return start_context(ctx);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_stop_context() - stop a context
|
|
* @ctx_cookie: Adapter context to be stopped.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_stop_context(void *ctx_cookie)
|
|
{
|
|
struct ocxlflash_context *ctx = ctx_cookie;
|
|
struct ocxl_hw_afu *afu = ctx->hw_afu;
|
|
struct ocxl_afu_config *acfg = &afu->acfg;
|
|
struct pci_dev *pdev = afu->pdev;
|
|
struct device *dev = afu->dev;
|
|
enum ocxlflash_ctx_state state;
|
|
int rc = 0;
|
|
|
|
mutex_lock(&ctx->state_mutex);
|
|
state = ctx->state;
|
|
ctx->state = CLOSED;
|
|
mutex_unlock(&ctx->state_mutex);
|
|
if (state != STARTED)
|
|
goto out;
|
|
|
|
rc = ocxl_config_terminate_pasid(pdev, acfg->dvsec_afu_control_pos,
|
|
ctx->pe);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_config_terminate_pasid failed rc=%d\n",
|
|
__func__, rc);
|
|
/* If EBUSY, PE could be referenced in future by the AFU */
|
|
if (rc == -EBUSY)
|
|
goto out;
|
|
}
|
|
|
|
rc = ocxl_link_remove_pe(afu->link_token, ctx->pe);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_link_remove_pe failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_afu_reset() - reset the AFU
|
|
* @ctx_cookie: Adapter context.
|
|
*/
|
|
static int ocxlflash_afu_reset(void *ctx_cookie)
|
|
{
|
|
struct ocxlflash_context *ctx = ctx_cookie;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
|
|
/* Pending implementation from OCXL transport services */
|
|
dev_err_once(dev, "%s: afu_reset() fop not supported\n", __func__);
|
|
|
|
/* Silently return success until it is implemented */
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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 err1;
|
|
}
|
|
|
|
idr_preload(GFP_KERNEL);
|
|
rc = idr_alloc(&afu->idr, ctx, 0, afu->max_pasid, GFP_NOWAIT);
|
|
idr_preload_end();
|
|
if (unlikely(rc < 0)) {
|
|
dev_err(dev, "%s: idr_alloc failed rc=%d\n", __func__, rc);
|
|
goto err2;
|
|
}
|
|
|
|
spin_lock_init(&ctx->slock);
|
|
init_waitqueue_head(&ctx->wq);
|
|
mutex_init(&ctx->state_mutex);
|
|
|
|
ctx->state = OPENED;
|
|
ctx->pe = rc;
|
|
ctx->master = false;
|
|
ctx->mapping = NULL;
|
|
ctx->hw_afu = afu;
|
|
ctx->irq_bitmap = 0;
|
|
ctx->pending_irq = false;
|
|
ctx->pending_fault = false;
|
|
out:
|
|
return ctx;
|
|
err2:
|
|
kfree(ctx);
|
|
err1:
|
|
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;
|
|
struct device *dev;
|
|
int rc = 0;
|
|
|
|
if (!ctx)
|
|
goto out;
|
|
|
|
dev = ctx->hw_afu->dev;
|
|
mutex_lock(&ctx->state_mutex);
|
|
if (ctx->state >= STARTED) {
|
|
dev_err(dev, "%s: Context in use, state=%d\n", __func__,
|
|
ctx->state);
|
|
mutex_unlock(&ctx->state_mutex);
|
|
rc = -EBUSY;
|
|
goto out;
|
|
}
|
|
mutex_unlock(&ctx->state_mutex);
|
|
|
|
idr_remove(&ctx->hw_afu->idr, ctx->pe);
|
|
ocxlflash_release_mapping(ctx);
|
|
kfree(ctx);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_perst_reloads_same_image() - sets the image reload policy
|
|
* @afu_cookie: Hardware AFU associated with the host.
|
|
* @image: Whether to load the same image on PERST.
|
|
*/
|
|
static void ocxlflash_perst_reloads_same_image(void *afu_cookie, bool image)
|
|
{
|
|
struct ocxl_hw_afu *afu = afu_cookie;
|
|
|
|
afu->perst_same_image = image;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_read_adapter_vpd() - reads the adapter VPD
|
|
* @pdev: PCI device associated with the host.
|
|
* @buf: Buffer to get the VPD data.
|
|
* @count: Size of buffer (maximum bytes that can be read).
|
|
*
|
|
* Return: size of VPD on success, -errno on failure
|
|
*/
|
|
static ssize_t ocxlflash_read_adapter_vpd(struct pci_dev *pdev, void *buf,
|
|
size_t count)
|
|
{
|
|
return pci_read_vpd(pdev, 0, count, buf);
|
|
}
|
|
|
|
/**
|
|
* free_afu_irqs() - internal service to free interrupts
|
|
* @ctx: Adapter context.
|
|
*/
|
|
static void free_afu_irqs(struct ocxlflash_context *ctx)
|
|
{
|
|
struct ocxl_hw_afu *afu = ctx->hw_afu;
|
|
struct device *dev = afu->dev;
|
|
int i;
|
|
|
|
if (!ctx->irqs) {
|
|
dev_err(dev, "%s: Interrupts not allocated\n", __func__);
|
|
return;
|
|
}
|
|
|
|
for (i = ctx->num_irqs; i >= 0; i--)
|
|
ocxl_link_free_irq(afu->link_token, ctx->irqs[i].hwirq);
|
|
|
|
kfree(ctx->irqs);
|
|
ctx->irqs = NULL;
|
|
}
|
|
|
|
/**
|
|
* alloc_afu_irqs() - internal service to allocate interrupts
|
|
* @ctx: Context associated with the request.
|
|
* @num: Number of interrupts requested.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int alloc_afu_irqs(struct ocxlflash_context *ctx, int num)
|
|
{
|
|
struct ocxl_hw_afu *afu = ctx->hw_afu;
|
|
struct device *dev = afu->dev;
|
|
struct ocxlflash_irqs *irqs;
|
|
u64 addr;
|
|
int rc = 0;
|
|
int hwirq;
|
|
int i;
|
|
|
|
if (ctx->irqs) {
|
|
dev_err(dev, "%s: Interrupts already allocated\n", __func__);
|
|
rc = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
if (num > OCXL_MAX_IRQS) {
|
|
dev_err(dev, "%s: Too many interrupts num=%d\n", __func__, num);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
irqs = kcalloc(num, sizeof(*irqs), GFP_KERNEL);
|
|
if (unlikely(!irqs)) {
|
|
dev_err(dev, "%s: Context irqs allocation failed\n", __func__);
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < num; i++) {
|
|
rc = ocxl_link_irq_alloc(afu->link_token, &hwirq, &addr);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_link_irq_alloc failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err;
|
|
}
|
|
|
|
irqs[i].hwirq = hwirq;
|
|
irqs[i].ptrig = addr;
|
|
}
|
|
|
|
ctx->irqs = irqs;
|
|
ctx->num_irqs = num;
|
|
out:
|
|
return rc;
|
|
err:
|
|
for (i = i-1; i >= 0; i--)
|
|
ocxl_link_free_irq(afu->link_token, irqs[i].hwirq);
|
|
kfree(irqs);
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_allocate_afu_irqs() - allocates the requested number of interrupts
|
|
* @ctx_cookie: Context associated with the request.
|
|
* @num: Number of interrupts requested.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_allocate_afu_irqs(void *ctx_cookie, int num)
|
|
{
|
|
return alloc_afu_irqs(ctx_cookie, num);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_free_afu_irqs() - frees the interrupts of an adapter context
|
|
* @ctx_cookie: Adapter context.
|
|
*/
|
|
static void ocxlflash_free_afu_irqs(void *ctx_cookie)
|
|
{
|
|
free_afu_irqs(ctx_cookie);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_unconfig_afu() - unconfigure the AFU
|
|
* @afu: AFU associated with the host.
|
|
*/
|
|
static void ocxlflash_unconfig_afu(struct ocxl_hw_afu *afu)
|
|
{
|
|
if (afu->gmmio_virt) {
|
|
iounmap(afu->gmmio_virt);
|
|
afu->gmmio_virt = NULL;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_destroy_afu() - destroy the AFU structure
|
|
* @afu_cookie: AFU to be freed.
|
|
*/
|
|
static void ocxlflash_destroy_afu(void *afu_cookie)
|
|
{
|
|
struct ocxl_hw_afu *afu = afu_cookie;
|
|
int pos;
|
|
|
|
if (!afu)
|
|
return;
|
|
|
|
ocxlflash_release_context(afu->ocxl_ctx);
|
|
idr_destroy(&afu->idr);
|
|
|
|
/* Disable the AFU */
|
|
pos = afu->acfg.dvsec_afu_control_pos;
|
|
ocxl_config_set_afu_state(afu->pdev, pos, 0);
|
|
|
|
ocxlflash_unconfig_afu(afu);
|
|
kfree(afu);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_config_fn() - configure the host function
|
|
* @pdev: PCI device associated with the host.
|
|
* @afu: AFU associated with the host.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_config_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
|
|
{
|
|
struct ocxl_fn_config *fcfg = &afu->fcfg;
|
|
struct device *dev = &pdev->dev;
|
|
u16 base, enabled, supported;
|
|
int rc = 0;
|
|
|
|
/* Read DVSEC config of the function */
|
|
rc = ocxl_config_read_function(pdev, fcfg);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_config_read_function failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
/* Check if function has AFUs defined, only 1 per function supported */
|
|
if (fcfg->max_afu_index >= 0) {
|
|
afu->is_present = true;
|
|
if (fcfg->max_afu_index != 0)
|
|
dev_warn(dev, "%s: Unexpected AFU index value %d\n",
|
|
__func__, fcfg->max_afu_index);
|
|
}
|
|
|
|
rc = ocxl_config_get_actag_info(pdev, &base, &enabled, &supported);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_config_get_actag_info failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
afu->fn_actag_base = base;
|
|
afu->fn_actag_enabled = enabled;
|
|
|
|
ocxl_config_set_actag(pdev, fcfg->dvsec_function_pos, base, enabled);
|
|
dev_dbg(dev, "%s: Function acTag range base=%u enabled=%u\n",
|
|
__func__, base, enabled);
|
|
|
|
rc = ocxl_link_setup(pdev, 0, &afu->link_token);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_link_setup failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = ocxl_config_set_TL(pdev, fcfg->dvsec_tl_pos);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_config_set_TL failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err;
|
|
}
|
|
out:
|
|
return rc;
|
|
err:
|
|
ocxl_link_release(pdev, afu->link_token);
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_unconfig_fn() - unconfigure the host function
|
|
* @pdev: PCI device associated with the host.
|
|
* @afu: AFU associated with the host.
|
|
*/
|
|
static void ocxlflash_unconfig_fn(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
|
|
{
|
|
ocxl_link_release(pdev, afu->link_token);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_map_mmio() - map the AFU MMIO space
|
|
* @afu: AFU associated with the host.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_map_mmio(struct ocxl_hw_afu *afu)
|
|
{
|
|
struct ocxl_afu_config *acfg = &afu->acfg;
|
|
struct pci_dev *pdev = afu->pdev;
|
|
struct device *dev = afu->dev;
|
|
phys_addr_t gmmio, ppmmio;
|
|
int rc = 0;
|
|
|
|
rc = pci_request_region(pdev, acfg->global_mmio_bar, "ocxlflash");
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: pci_request_region for global failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
gmmio = pci_resource_start(pdev, acfg->global_mmio_bar);
|
|
gmmio += acfg->global_mmio_offset;
|
|
|
|
rc = pci_request_region(pdev, acfg->pp_mmio_bar, "ocxlflash");
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: pci_request_region for pp bar failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err1;
|
|
}
|
|
ppmmio = pci_resource_start(pdev, acfg->pp_mmio_bar);
|
|
ppmmio += acfg->pp_mmio_offset;
|
|
|
|
afu->gmmio_virt = ioremap(gmmio, acfg->global_mmio_size);
|
|
if (unlikely(!afu->gmmio_virt)) {
|
|
dev_err(dev, "%s: MMIO mapping failed\n", __func__);
|
|
rc = -ENOMEM;
|
|
goto err2;
|
|
}
|
|
|
|
afu->gmmio_phys = gmmio;
|
|
afu->ppmmio_phys = ppmmio;
|
|
out:
|
|
return rc;
|
|
err2:
|
|
pci_release_region(pdev, acfg->pp_mmio_bar);
|
|
err1:
|
|
pci_release_region(pdev, acfg->global_mmio_bar);
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_config_afu() - configure the host AFU
|
|
* @pdev: PCI device associated with the host.
|
|
* @afu: AFU associated with the host.
|
|
*
|
|
* Must be called _after_ host function configuration.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_config_afu(struct pci_dev *pdev, struct ocxl_hw_afu *afu)
|
|
{
|
|
struct ocxl_afu_config *acfg = &afu->acfg;
|
|
struct ocxl_fn_config *fcfg = &afu->fcfg;
|
|
struct device *dev = &pdev->dev;
|
|
int count;
|
|
int base;
|
|
int pos;
|
|
int rc = 0;
|
|
|
|
/* This HW AFU function does not have any AFUs defined */
|
|
if (!afu->is_present)
|
|
goto out;
|
|
|
|
/* Read AFU config at index 0 */
|
|
rc = ocxl_config_read_afu(pdev, fcfg, acfg, 0);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxl_config_read_afu failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
/* Only one AFU per function is supported, so actag_base is same */
|
|
base = afu->fn_actag_base;
|
|
count = min_t(int, acfg->actag_supported, afu->fn_actag_enabled);
|
|
pos = acfg->dvsec_afu_control_pos;
|
|
|
|
ocxl_config_set_afu_actag(pdev, pos, base, count);
|
|
dev_dbg(dev, "%s: acTag base=%d enabled=%d\n", __func__, base, count);
|
|
afu->afu_actag_base = base;
|
|
afu->afu_actag_enabled = count;
|
|
afu->max_pasid = 1 << acfg->pasid_supported_log;
|
|
|
|
ocxl_config_set_afu_pasid(pdev, pos, 0, acfg->pasid_supported_log);
|
|
|
|
rc = ocxlflash_map_mmio(afu);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: ocxlflash_map_mmio failed rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
/* Enable the AFU */
|
|
ocxl_config_set_afu_state(pdev, acfg->dvsec_afu_control_pos, 1);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_create_afu() - create the AFU for OCXL
|
|
* @pdev: PCI device associated with the host.
|
|
*
|
|
* Return: AFU on success, NULL on failure
|
|
*/
|
|
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;
|
|
|
|
afu = kzalloc(sizeof(*afu), GFP_KERNEL);
|
|
if (unlikely(!afu)) {
|
|
dev_err(dev, "%s: HW AFU allocation failed\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
afu->pdev = pdev;
|
|
afu->dev = dev;
|
|
idr_init(&afu->idr);
|
|
|
|
rc = ocxlflash_config_fn(pdev, afu);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: Function configuration failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err1;
|
|
}
|
|
|
|
rc = ocxlflash_config_afu(pdev, afu);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: AFU configuration failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err2;
|
|
}
|
|
|
|
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 err3;
|
|
}
|
|
|
|
afu->ocxl_ctx = ctx;
|
|
out:
|
|
return afu;
|
|
err3:
|
|
ocxlflash_unconfig_afu(afu);
|
|
err2:
|
|
ocxlflash_unconfig_fn(pdev, afu);
|
|
err1:
|
|
idr_destroy(&afu->idr);
|
|
kfree(afu);
|
|
afu = NULL;
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* ctx_event_pending() - check for any event pending on the context
|
|
* @ctx: Context to be checked.
|
|
*
|
|
* Return: true if there is an event pending, false if none pending
|
|
*/
|
|
static inline bool ctx_event_pending(struct ocxlflash_context *ctx)
|
|
{
|
|
if (ctx->pending_irq || ctx->pending_fault)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* afu_poll() - poll the AFU for events on the context
|
|
* @file: File associated with the adapter context.
|
|
* @poll: Poll structure from the user.
|
|
*
|
|
* Return: poll mask
|
|
*/
|
|
static unsigned int afu_poll(struct file *file, struct poll_table_struct *poll)
|
|
{
|
|
struct ocxlflash_context *ctx = file->private_data;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
ulong lock_flags;
|
|
int mask = 0;
|
|
|
|
poll_wait(file, &ctx->wq, poll);
|
|
|
|
spin_lock_irqsave(&ctx->slock, lock_flags);
|
|
if (ctx_event_pending(ctx))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
else if (ctx->state == CLOSED)
|
|
mask |= POLLERR;
|
|
spin_unlock_irqrestore(&ctx->slock, lock_flags);
|
|
|
|
dev_dbg(dev, "%s: Poll wait completed for pe %i mask %i\n",
|
|
__func__, ctx->pe, mask);
|
|
|
|
return mask;
|
|
}
|
|
|
|
/**
|
|
* afu_read() - perform a read on the context for any event
|
|
* @file: File associated with the adapter context.
|
|
* @buf: Buffer to receive the data.
|
|
* @count: Size of buffer (maximum bytes that can be read).
|
|
* @off: Offset.
|
|
*
|
|
* Return: size of the data read on success, -errno on failure
|
|
*/
|
|
static ssize_t afu_read(struct file *file, char __user *buf, size_t count,
|
|
loff_t *off)
|
|
{
|
|
struct ocxlflash_context *ctx = file->private_data;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
struct cxl_event event;
|
|
ulong lock_flags;
|
|
ssize_t esize;
|
|
ssize_t rc;
|
|
int bit;
|
|
DEFINE_WAIT(event_wait);
|
|
|
|
if (*off != 0) {
|
|
dev_err(dev, "%s: Non-zero offset not supported, off=%lld\n",
|
|
__func__, *off);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock_irqsave(&ctx->slock, lock_flags);
|
|
|
|
for (;;) {
|
|
prepare_to_wait(&ctx->wq, &event_wait, TASK_INTERRUPTIBLE);
|
|
|
|
if (ctx_event_pending(ctx) || (ctx->state == CLOSED))
|
|
break;
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
dev_err(dev, "%s: File cannot be blocked on I/O\n",
|
|
__func__);
|
|
rc = -EAGAIN;
|
|
goto err;
|
|
}
|
|
|
|
if (signal_pending(current)) {
|
|
dev_err(dev, "%s: Signal pending on the process\n",
|
|
__func__);
|
|
rc = -ERESTARTSYS;
|
|
goto err;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ctx->slock, lock_flags);
|
|
schedule();
|
|
spin_lock_irqsave(&ctx->slock, lock_flags);
|
|
}
|
|
|
|
finish_wait(&ctx->wq, &event_wait);
|
|
|
|
memset(&event, 0, sizeof(event));
|
|
event.header.process_element = ctx->pe;
|
|
event.header.size = sizeof(struct cxl_event_header);
|
|
if (ctx->pending_irq) {
|
|
esize = sizeof(struct cxl_event_afu_interrupt);
|
|
event.header.size += esize;
|
|
event.header.type = CXL_EVENT_AFU_INTERRUPT;
|
|
|
|
bit = find_first_bit(&ctx->irq_bitmap, ctx->num_irqs);
|
|
clear_bit(bit, &ctx->irq_bitmap);
|
|
event.irq.irq = bit + 1;
|
|
if (bitmap_empty(&ctx->irq_bitmap, ctx->num_irqs))
|
|
ctx->pending_irq = false;
|
|
} else if (ctx->pending_fault) {
|
|
event.header.size += sizeof(struct cxl_event_data_storage);
|
|
event.header.type = CXL_EVENT_DATA_STORAGE;
|
|
event.fault.addr = ctx->fault_addr;
|
|
event.fault.dsisr = ctx->fault_dsisr;
|
|
ctx->pending_fault = false;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ctx->slock, lock_flags);
|
|
|
|
if (copy_to_user(buf, &event, event.header.size)) {
|
|
dev_err(dev, "%s: copy_to_user failed\n", __func__);
|
|
rc = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
rc = event.header.size;
|
|
out:
|
|
return rc;
|
|
err:
|
|
finish_wait(&ctx->wq, &event_wait);
|
|
spin_unlock_irqrestore(&ctx->slock, lock_flags);
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* afu_release() - release and free the context
|
|
* @inode: File inode pointer.
|
|
* @file: File associated with the context.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int afu_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct ocxlflash_context *ctx = file->private_data;
|
|
int i;
|
|
|
|
/* Unmap and free the interrupts associated with the context */
|
|
for (i = ctx->num_irqs; i >= 0; i--)
|
|
afu_unmap_irq(0, ctx, i, ctx);
|
|
free_afu_irqs(ctx);
|
|
|
|
return ocxlflash_release_context(ctx);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_mmap_fault() - mmap fault handler
|
|
* @vmf: VM fault associated with current fault.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static vm_fault_t ocxlflash_mmap_fault(struct vm_fault *vmf)
|
|
{
|
|
struct vm_area_struct *vma = vmf->vma;
|
|
struct ocxlflash_context *ctx = vma->vm_file->private_data;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
u64 mmio_area, offset;
|
|
|
|
offset = vmf->pgoff << PAGE_SHIFT;
|
|
if (offset >= ctx->psn_size)
|
|
return VM_FAULT_SIGBUS;
|
|
|
|
mutex_lock(&ctx->state_mutex);
|
|
if (ctx->state != STARTED) {
|
|
dev_err(dev, "%s: Context not started, state=%d\n",
|
|
__func__, ctx->state);
|
|
mutex_unlock(&ctx->state_mutex);
|
|
return VM_FAULT_SIGBUS;
|
|
}
|
|
mutex_unlock(&ctx->state_mutex);
|
|
|
|
mmio_area = ctx->psn_phys;
|
|
mmio_area += offset;
|
|
|
|
return vmf_insert_pfn(vma, vmf->address, mmio_area >> PAGE_SHIFT);
|
|
}
|
|
|
|
static const struct vm_operations_struct ocxlflash_vmops = {
|
|
.fault = ocxlflash_mmap_fault,
|
|
};
|
|
|
|
/**
|
|
* afu_mmap() - map the fault handler operations
|
|
* @file: File associated with the context.
|
|
* @vma: VM area associated with mapping.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int afu_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
struct ocxlflash_context *ctx = file->private_data;
|
|
|
|
if ((vma_pages(vma) + vma->vm_pgoff) >
|
|
(ctx->psn_size >> PAGE_SHIFT))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |= VM_IO | VM_PFNMAP;
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
vma->vm_ops = &ocxlflash_vmops;
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations ocxl_afu_fops = {
|
|
.owner = THIS_MODULE,
|
|
.poll = afu_poll,
|
|
.read = afu_read,
|
|
.release = afu_release,
|
|
.mmap = afu_mmap,
|
|
};
|
|
|
|
#define PATCH_FOPS(NAME) \
|
|
do { if (!fops->NAME) fops->NAME = ocxl_afu_fops.NAME; } while (0)
|
|
|
|
/**
|
|
* ocxlflash_get_fd() - get file descriptor for an adapter context
|
|
* @ctx_cookie: Adapter context.
|
|
* @fops: File operations to be associated.
|
|
* @fd: File descriptor to be returned back.
|
|
*
|
|
* Return: pointer to the file on success, ERR_PTR on failure
|
|
*/
|
|
static struct file *ocxlflash_get_fd(void *ctx_cookie,
|
|
struct file_operations *fops, int *fd)
|
|
{
|
|
struct ocxlflash_context *ctx = ctx_cookie;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
struct file *file;
|
|
int flags, fdtmp;
|
|
int rc = 0;
|
|
char *name = NULL;
|
|
|
|
/* Only allow one fd per context */
|
|
if (ctx->mapping) {
|
|
dev_err(dev, "%s: Context is already mapped to an fd\n",
|
|
__func__);
|
|
rc = -EEXIST;
|
|
goto err1;
|
|
}
|
|
|
|
flags = O_RDWR | O_CLOEXEC;
|
|
|
|
/* This code is similar to anon_inode_getfd() */
|
|
rc = get_unused_fd_flags(flags);
|
|
if (unlikely(rc < 0)) {
|
|
dev_err(dev, "%s: get_unused_fd_flags failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err1;
|
|
}
|
|
fdtmp = rc;
|
|
|
|
/* Patch the file ops that are not defined */
|
|
if (fops) {
|
|
PATCH_FOPS(poll);
|
|
PATCH_FOPS(read);
|
|
PATCH_FOPS(release);
|
|
PATCH_FOPS(mmap);
|
|
} else /* Use default ops */
|
|
fops = (struct file_operations *)&ocxl_afu_fops;
|
|
|
|
name = kasprintf(GFP_KERNEL, "ocxlflash:%d", ctx->pe);
|
|
file = ocxlflash_getfile(dev, name, fops, ctx, flags);
|
|
kfree(name);
|
|
if (IS_ERR(file)) {
|
|
rc = PTR_ERR(file);
|
|
dev_err(dev, "%s: ocxlflash_getfile failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err2;
|
|
}
|
|
|
|
ctx->mapping = file->f_mapping;
|
|
*fd = fdtmp;
|
|
out:
|
|
return file;
|
|
err2:
|
|
put_unused_fd(fdtmp);
|
|
err1:
|
|
file = ERR_PTR(rc);
|
|
goto out;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_fops_get_context() - get the context associated with the file
|
|
* @file: File associated with the adapter context.
|
|
*
|
|
* Return: pointer to the context
|
|
*/
|
|
static void *ocxlflash_fops_get_context(struct file *file)
|
|
{
|
|
return file->private_data;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_afu_irq() - interrupt handler for user contexts
|
|
* @irq: Interrupt number.
|
|
* @data: Private data provided at interrupt registration, the context.
|
|
*
|
|
* Return: Always return IRQ_HANDLED.
|
|
*/
|
|
static irqreturn_t ocxlflash_afu_irq(int irq, void *data)
|
|
{
|
|
struct ocxlflash_context *ctx = data;
|
|
struct device *dev = ctx->hw_afu->dev;
|
|
int i;
|
|
|
|
dev_dbg(dev, "%s: Interrupt raised for pe %i virq %i\n",
|
|
__func__, ctx->pe, irq);
|
|
|
|
for (i = 0; i < ctx->num_irqs; i++) {
|
|
if (ctx->irqs[i].virq == irq)
|
|
break;
|
|
}
|
|
if (unlikely(i >= ctx->num_irqs)) {
|
|
dev_err(dev, "%s: Received AFU IRQ out of range\n", __func__);
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&ctx->slock);
|
|
set_bit(i - 1, &ctx->irq_bitmap);
|
|
ctx->pending_irq = true;
|
|
spin_unlock(&ctx->slock);
|
|
|
|
wake_up_all(&ctx->wq);
|
|
out:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_start_work() - start a user context
|
|
* @ctx_cookie: Context to be started.
|
|
* @num_irqs: Number of interrupts requested.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_start_work(void *ctx_cookie, u64 num_irqs)
|
|
{
|
|
struct ocxlflash_context *ctx = ctx_cookie;
|
|
struct ocxl_hw_afu *afu = ctx->hw_afu;
|
|
struct device *dev = afu->dev;
|
|
char *name;
|
|
int rc = 0;
|
|
int i;
|
|
|
|
rc = alloc_afu_irqs(ctx, num_irqs);
|
|
if (unlikely(rc < 0)) {
|
|
dev_err(dev, "%s: alloc_afu_irqs failed rc=%d\n", __func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < num_irqs; i++) {
|
|
name = kasprintf(GFP_KERNEL, "ocxlflash-%s-pe%i-%i",
|
|
dev_name(dev), ctx->pe, i);
|
|
rc = afu_map_irq(0, ctx, i, ocxlflash_afu_irq, ctx, name);
|
|
kfree(name);
|
|
if (unlikely(rc < 0)) {
|
|
dev_err(dev, "%s: afu_map_irq failed rc=%d\n",
|
|
__func__, rc);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
rc = start_context(ctx);
|
|
if (unlikely(rc)) {
|
|
dev_err(dev, "%s: start_context failed rc=%d\n", __func__, rc);
|
|
goto err;
|
|
}
|
|
out:
|
|
return rc;
|
|
err:
|
|
for (i = i-1; i >= 0; i--)
|
|
afu_unmap_irq(0, ctx, i, ctx);
|
|
free_afu_irqs(ctx);
|
|
goto out;
|
|
};
|
|
|
|
/**
|
|
* ocxlflash_fd_mmap() - mmap handler for adapter file descriptor
|
|
* @file: File installed with adapter file descriptor.
|
|
* @vma: VM area associated with mapping.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_fd_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
return afu_mmap(file, vma);
|
|
}
|
|
|
|
/**
|
|
* ocxlflash_fd_release() - release the context associated with the file
|
|
* @inode: File inode pointer.
|
|
* @file: File associated with the adapter context.
|
|
*
|
|
* Return: 0 on success, -errno on failure
|
|
*/
|
|
static int ocxlflash_fd_release(struct inode *inode, struct file *file)
|
|
{
|
|
return afu_release(inode, file);
|
|
}
|
|
|
|
/* Backend ops to ocxlflash services */
|
|
const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
|
|
.module = THIS_MODULE,
|
|
.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,
|
|
.get_irq_objhndl = ocxlflash_get_irq_objhndl,
|
|
.start_context = ocxlflash_start_context,
|
|
.stop_context = ocxlflash_stop_context,
|
|
.afu_reset = ocxlflash_afu_reset,
|
|
.set_master = ocxlflash_set_master,
|
|
.get_context = ocxlflash_get_context,
|
|
.dev_context_init = ocxlflash_dev_context_init,
|
|
.release_context = ocxlflash_release_context,
|
|
.perst_reloads_same_image = ocxlflash_perst_reloads_same_image,
|
|
.read_adapter_vpd = ocxlflash_read_adapter_vpd,
|
|
.allocate_afu_irqs = ocxlflash_allocate_afu_irqs,
|
|
.free_afu_irqs = ocxlflash_free_afu_irqs,
|
|
.create_afu = ocxlflash_create_afu,
|
|
.destroy_afu = ocxlflash_destroy_afu,
|
|
.get_fd = ocxlflash_get_fd,
|
|
.fops_get_context = ocxlflash_fops_get_context,
|
|
.start_work = ocxlflash_start_work,
|
|
.fd_mmap = ocxlflash_fd_mmap,
|
|
.fd_release = ocxlflash_fd_release,
|
|
};
|