Orange Pi5 kernel

Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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/*
* Copyright(c) 2020 Cornelis Networks, Inc.
* Copyright(c) 2015-2020 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/poll.h>
#include <linux/cdev.h>
#include <linux/vmalloc.h>
#include <linux/io.h>
#include <linux/sched/mm.h>
#include <linux/bitmap.h>
#include <rdma/ib.h>
#include "hfi.h"
#include "pio.h"
#include "device.h"
#include "common.h"
#include "trace.h"
#include "mmu_rb.h"
#include "user_sdma.h"
#include "user_exp_rcv.h"
#include "aspm.h"
#undef pr_fmt
#define pr_fmt(fmt) DRIVER_NAME ": " fmt
#define SEND_CTXT_HALT_TIMEOUT 1000 /* msecs */
/*
* File operation functions
*/
static int hfi1_file_open(struct inode *inode, struct file *fp);
static int hfi1_file_close(struct inode *inode, struct file *fp);
static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from);
static __poll_t hfi1_poll(struct file *fp, struct poll_table_struct *pt);
static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma);
static u64 kvirt_to_phys(void *addr);
static int assign_ctxt(struct hfi1_filedata *fd, unsigned long arg, u32 len);
static void init_subctxts(struct hfi1_ctxtdata *uctxt,
<------><------><------> const struct hfi1_user_info *uinfo);
static int init_user_ctxt(struct hfi1_filedata *fd,
<------><------><------> struct hfi1_ctxtdata *uctxt);
static void user_init(struct hfi1_ctxtdata *uctxt);
static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len);
static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len);
static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------> u32 len);
static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------> u32 len);
static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------><------>u32 len);
static int setup_base_ctxt(struct hfi1_filedata *fd,
<------><------><------> struct hfi1_ctxtdata *uctxt);
static int setup_subctxt(struct hfi1_ctxtdata *uctxt);
static int find_sub_ctxt(struct hfi1_filedata *fd,
<------><------><------> const struct hfi1_user_info *uinfo);
static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd,
<------><------><------> struct hfi1_user_info *uinfo,
<------><------><------> struct hfi1_ctxtdata **cd);
static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt);
static __poll_t poll_urgent(struct file *fp, struct poll_table_struct *pt);
static __poll_t poll_next(struct file *fp, struct poll_table_struct *pt);
static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt,
<------><------><------> unsigned long arg);
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg);
static int ctxt_reset(struct hfi1_ctxtdata *uctxt);
static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
<------><------> unsigned long arg);
static vm_fault_t vma_fault(struct vm_fault *vmf);
static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
<------><------><------> unsigned long arg);
static const struct file_operations hfi1_file_ops = {
<------>.owner = THIS_MODULE,
<------>.write_iter = hfi1_write_iter,
<------>.open = hfi1_file_open,
<------>.release = hfi1_file_close,
<------>.unlocked_ioctl = hfi1_file_ioctl,
<------>.poll = hfi1_poll,
<------>.mmap = hfi1_file_mmap,
<------>.llseek = noop_llseek,
};
static const struct vm_operations_struct vm_ops = {
<------>.fault = vma_fault,
};
/*
* Types of memories mapped into user processes' space
*/
enum mmap_types {
<------>PIO_BUFS = 1,
<------>PIO_BUFS_SOP,
<------>PIO_CRED,
<------>RCV_HDRQ,
<------>RCV_EGRBUF,
<------>UREGS,
<------>EVENTS,
<------>STATUS,
<------>RTAIL,
<------>SUBCTXT_UREGS,
<------>SUBCTXT_RCV_HDRQ,
<------>SUBCTXT_EGRBUF,
<------>SDMA_COMP
};
/*
* Masks and offsets defining the mmap tokens
*/
#define HFI1_MMAP_OFFSET_MASK 0xfffULL
#define HFI1_MMAP_OFFSET_SHIFT 0
#define HFI1_MMAP_SUBCTXT_MASK 0xfULL
#define HFI1_MMAP_SUBCTXT_SHIFT 12
#define HFI1_MMAP_CTXT_MASK 0xffULL
#define HFI1_MMAP_CTXT_SHIFT 16
#define HFI1_MMAP_TYPE_MASK 0xfULL
#define HFI1_MMAP_TYPE_SHIFT 24
#define HFI1_MMAP_MAGIC_MASK 0xffffffffULL
#define HFI1_MMAP_MAGIC_SHIFT 32
#define HFI1_MMAP_MAGIC 0xdabbad00
#define HFI1_MMAP_TOKEN_SET(field, val) \
<------>(((val) & HFI1_MMAP_##field##_MASK) << HFI1_MMAP_##field##_SHIFT)
#define HFI1_MMAP_TOKEN_GET(field, token) \
<------>(((token) >> HFI1_MMAP_##field##_SHIFT) & HFI1_MMAP_##field##_MASK)
#define HFI1_MMAP_TOKEN(type, ctxt, subctxt, addr) \
<------>(HFI1_MMAP_TOKEN_SET(MAGIC, HFI1_MMAP_MAGIC) | \
<------>HFI1_MMAP_TOKEN_SET(TYPE, type) | \
<------>HFI1_MMAP_TOKEN_SET(CTXT, ctxt) | \
<------>HFI1_MMAP_TOKEN_SET(SUBCTXT, subctxt) | \
<------>HFI1_MMAP_TOKEN_SET(OFFSET, (offset_in_page(addr))))
#define dbg(fmt, ...) \
<------>pr_info(fmt, ##__VA_ARGS__)
static inline int is_valid_mmap(u64 token)
{
<------>return (HFI1_MMAP_TOKEN_GET(MAGIC, token) == HFI1_MMAP_MAGIC);
}
static int hfi1_file_open(struct inode *inode, struct file *fp)
{
<------>struct hfi1_filedata *fd;
<------>struct hfi1_devdata *dd = container_of(inode->i_cdev,
<------><------><------><------><------> struct hfi1_devdata,
<------><------><------><------><------> user_cdev);
<------>if (!((dd->flags & HFI1_PRESENT) && dd->kregbase1))
<------><------>return -EINVAL;
<------>if (!atomic_inc_not_zero(&dd->user_refcount))
<------><------>return -ENXIO;
<------>/* The real work is performed later in assign_ctxt() */
<------>fd = kzalloc(sizeof(*fd), GFP_KERNEL);
<------>if (!fd || init_srcu_struct(&fd->pq_srcu))
<------><------>goto nomem;
<------>spin_lock_init(&fd->pq_rcu_lock);
<------>spin_lock_init(&fd->tid_lock);
<------>spin_lock_init(&fd->invalid_lock);
<------>fd->rec_cpu_num = -1; /* no cpu affinity by default */
<------>fd->dd = dd;
<------>fp->private_data = fd;
<------>return 0;
nomem:
<------>kfree(fd);
<------>fp->private_data = NULL;
<------>if (atomic_dec_and_test(&dd->user_refcount))
<------><------>complete(&dd->user_comp);
<------>return -ENOMEM;
}
static long hfi1_file_ioctl(struct file *fp, unsigned int cmd,
<------><------><------> unsigned long arg)
{
<------>struct hfi1_filedata *fd = fp->private_data;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>int ret = 0;
<------>int uval = 0;
<------>hfi1_cdbg(IOCTL, "IOCTL recv: 0x%x", cmd);
<------>if (cmd != HFI1_IOCTL_ASSIGN_CTXT &&
<------> cmd != HFI1_IOCTL_GET_VERS &&
<------> !uctxt)
<------><------>return -EINVAL;
<------>switch (cmd) {
<------>case HFI1_IOCTL_ASSIGN_CTXT:
<------><------>ret = assign_ctxt(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_CTXT_INFO:
<------><------>ret = get_ctxt_info(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_USER_INFO:
<------><------>ret = get_base_info(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_CREDIT_UPD:
<------><------>if (uctxt)
<------><------><------>sc_return_credits(uctxt->sc);
<------><------>break;
<------>case HFI1_IOCTL_TID_UPDATE:
<------><------>ret = user_exp_rcv_setup(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_TID_FREE:
<------><------>ret = user_exp_rcv_clear(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_TID_INVAL_READ:
<------><------>ret = user_exp_rcv_invalid(fd, arg, _IOC_SIZE(cmd));
<------><------>break;
<------>case HFI1_IOCTL_RECV_CTRL:
<------><------>ret = manage_rcvq(uctxt, fd->subctxt, arg);
<------><------>break;
<------>case HFI1_IOCTL_POLL_TYPE:
<------><------>if (get_user(uval, (int __user *)arg))
<------><------><------>return -EFAULT;
<------><------>uctxt->poll_type = (typeof(uctxt->poll_type))uval;
<------><------>break;
<------>case HFI1_IOCTL_ACK_EVENT:
<------><------>ret = user_event_ack(uctxt, fd->subctxt, arg);
<------><------>break;
<------>case HFI1_IOCTL_SET_PKEY:
<------><------>ret = set_ctxt_pkey(uctxt, arg);
<------><------>break;
<------>case HFI1_IOCTL_CTXT_RESET:
<------><------>ret = ctxt_reset(uctxt);
<------><------>break;
<------>case HFI1_IOCTL_GET_VERS:
<------><------>uval = HFI1_USER_SWVERSION;
<------><------>if (put_user(uval, (int __user *)arg))
<------><------><------>return -EFAULT;
<------><------>break;
<------>default:
<------><------>return -EINVAL;
<------>}
<------>return ret;
}
static ssize_t hfi1_write_iter(struct kiocb *kiocb, struct iov_iter *from)
{
<------>struct hfi1_filedata *fd = kiocb->ki_filp->private_data;
<------>struct hfi1_user_sdma_pkt_q *pq;
<------>struct hfi1_user_sdma_comp_q *cq = fd->cq;
<------>int done = 0, reqs = 0;
<------>unsigned long dim = from->nr_segs;
<------>int idx;
<------>idx = srcu_read_lock(&fd->pq_srcu);
<------>pq = srcu_dereference(fd->pq, &fd->pq_srcu);
<------>if (!cq || !pq) {
<------><------>srcu_read_unlock(&fd->pq_srcu, idx);
<------><------>return -EIO;
<------>}
<------>if (!iter_is_iovec(from) || !dim) {
<------><------>srcu_read_unlock(&fd->pq_srcu, idx);
<------><------>return -EINVAL;
<------>}
<------>trace_hfi1_sdma_request(fd->dd, fd->uctxt->ctxt, fd->subctxt, dim);
<------>if (atomic_read(&pq->n_reqs) == pq->n_max_reqs) {
<------><------>srcu_read_unlock(&fd->pq_srcu, idx);
<------><------>return -ENOSPC;
<------>}
<------>while (dim) {
<------><------>int ret;
<------><------>unsigned long count = 0;
<------><------>ret = hfi1_user_sdma_process_request(
<------><------><------>fd, (struct iovec *)(from->iov + done),
<------><------><------>dim, &count);
<------><------>if (ret) {
<------><------><------>reqs = ret;
<------><------><------>break;
<------><------>}
<------><------>dim -= count;
<------><------>done += count;
<------><------>reqs++;
<------>}
<------>srcu_read_unlock(&fd->pq_srcu, idx);
<------>return reqs;
}
static int hfi1_file_mmap(struct file *fp, struct vm_area_struct *vma)
{
<------>struct hfi1_filedata *fd = fp->private_data;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>struct hfi1_devdata *dd;
<------>unsigned long flags;
<------>u64 token = vma->vm_pgoff << PAGE_SHIFT,
<------><------>memaddr = 0;
<------>void *memvirt = NULL;
<------>u8 subctxt, mapio = 0, vmf = 0, type;
<------>ssize_t memlen = 0;
<------>int ret = 0;
<------>u16 ctxt;
<------>if (!is_valid_mmap(token) || !uctxt ||
<------> !(vma->vm_flags & VM_SHARED)) {
<------><------>ret = -EINVAL;
<------><------>goto done;
<------>}
<------>dd = uctxt->dd;
<------>ctxt = HFI1_MMAP_TOKEN_GET(CTXT, token);
<------>subctxt = HFI1_MMAP_TOKEN_GET(SUBCTXT, token);
<------>type = HFI1_MMAP_TOKEN_GET(TYPE, token);
<------>if (ctxt != uctxt->ctxt || subctxt != fd->subctxt) {
<------><------>ret = -EINVAL;
<------><------>goto done;
<------>}
<------>flags = vma->vm_flags;
<------>switch (type) {
<------>case PIO_BUFS:
<------>case PIO_BUFS_SOP:
<------><------>memaddr = ((dd->physaddr + TXE_PIO_SEND) +
<------><------><------><------>/* chip pio base */
<------><------><------> (uctxt->sc->hw_context * BIT(16))) +
<------><------><------><------>/* 64K PIO space / ctxt */
<------><------><------>(type == PIO_BUFS_SOP ?
<------><------><------><------>(TXE_PIO_SIZE / 2) : 0); /* sop? */
<------><------>/*
<------><------> * Map only the amount allocated to the context, not the
<------><------> * entire available context's PIO space.
<------><------> */
<------><------>memlen = PAGE_ALIGN(uctxt->sc->credits * PIO_BLOCK_SIZE);
<------><------>flags &= ~VM_MAYREAD;
<------><------>flags |= VM_DONTCOPY | VM_DONTEXPAND;
<------><------>vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
<------><------>mapio = 1;
<------><------>break;
<------>case PIO_CRED:
<------><------>if (flags & VM_WRITE) {
<------><------><------>ret = -EPERM;
<------><------><------>goto done;
<------><------>}
<------><------>/*
<------><------> * The credit return location for this context could be on the
<------><------> * second or third page allocated for credit returns (if number
<------><------> * of enabled contexts > 64 and 128 respectively).
<------><------> */
<------><------>memvirt = dd->cr_base[uctxt->numa_id].va;
<------><------>memaddr = virt_to_phys(memvirt) +
<------><------><------>(((u64)uctxt->sc->hw_free -
<------><------><------> (u64)dd->cr_base[uctxt->numa_id].va) & PAGE_MASK);
<------><------>memlen = PAGE_SIZE;
<------><------>flags &= ~VM_MAYWRITE;
<------><------>flags |= VM_DONTCOPY | VM_DONTEXPAND;
<------><------>/*
<------><------> * The driver has already allocated memory for credit
<------><------> * returns and programmed it into the chip. Has that
<------><------> * memory been flagged as non-cached?
<------><------> */
<------><------>/* vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); */
<------><------>mapio = 1;
<------><------>break;
<------>case RCV_HDRQ:
<------><------>memlen = rcvhdrq_size(uctxt);
<------><------>memvirt = uctxt->rcvhdrq;
<------><------>break;
<------>case RCV_EGRBUF: {
<------><------>unsigned long addr;
<------><------>int i;
<------><------>/*
<------><------> * The RcvEgr buffer need to be handled differently
<------><------> * as multiple non-contiguous pages need to be mapped
<------><------> * into the user process.
<------><------> */
<------><------>memlen = uctxt->egrbufs.size;
<------><------>if ((vma->vm_end - vma->vm_start) != memlen) {
<------><------><------>dd_dev_err(dd, "Eager buffer map size invalid (%lu != %lu)\n",
<------><------><------><------> (vma->vm_end - vma->vm_start), memlen);
<------><------><------>ret = -EINVAL;
<------><------><------>goto done;
<------><------>}
<------><------>if (vma->vm_flags & VM_WRITE) {
<------><------><------>ret = -EPERM;
<------><------><------>goto done;
<------><------>}
<------><------>vma->vm_flags &= ~VM_MAYWRITE;
<------><------>addr = vma->vm_start;
<------><------>for (i = 0 ; i < uctxt->egrbufs.numbufs; i++) {
<------><------><------>memlen = uctxt->egrbufs.buffers[i].len;
<------><------><------>memvirt = uctxt->egrbufs.buffers[i].addr;
<------><------><------>ret = remap_pfn_range(
<------><------><------><------>vma, addr,
<------><------><------><------>/*
<------><------><------><------> * virt_to_pfn() does the same, but
<------><------><------><------> * it's not available on x86_64
<------><------><------><------> * when CONFIG_MMU is enabled.
<------><------><------><------> */
<------><------><------><------>PFN_DOWN(__pa(memvirt)),
<------><------><------><------>memlen,
<------><------><------><------>vma->vm_page_prot);
<------><------><------>if (ret < 0)
<------><------><------><------>goto done;
<------><------><------>addr += memlen;
<------><------>}
<------><------>ret = 0;
<------><------>goto done;
<------>}
<------>case UREGS:
<------><------>/*
<------><------> * Map only the page that contains this context's user
<------><------> * registers.
<------><------> */
<------><------>memaddr = (unsigned long)
<------><------><------>(dd->physaddr + RXE_PER_CONTEXT_USER)
<------><------><------>+ (uctxt->ctxt * RXE_PER_CONTEXT_SIZE);
<------><------>/*
<------><------> * TidFlow table is on the same page as the rest of the
<------><------> * user registers.
<------><------> */
<------><------>memlen = PAGE_SIZE;
<------><------>flags |= VM_DONTCOPY | VM_DONTEXPAND;
<------><------>vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
<------><------>mapio = 1;
<------><------>break;
<------>case EVENTS:
<------><------>/*
<------><------> * Use the page where this context's flags are. User level
<------><------> * knows where it's own bitmap is within the page.
<------><------> */
<------><------>memaddr = (unsigned long)
<------><------><------>(dd->events + uctxt_offset(uctxt)) & PAGE_MASK;
<------><------>memlen = PAGE_SIZE;
<------><------>/*
<------><------> * v3.7 removes VM_RESERVED but the effect is kept by
<------><------> * using VM_IO.
<------><------> */
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>vmf = 1;
<------><------>break;
<------>case STATUS:
<------><------>if (flags & VM_WRITE) {
<------><------><------>ret = -EPERM;
<------><------><------>goto done;
<------><------>}
<------><------>memaddr = kvirt_to_phys((void *)dd->status);
<------><------>memlen = PAGE_SIZE;
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>break;
<------>case RTAIL:
<------><------>if (!HFI1_CAP_IS_USET(DMA_RTAIL)) {
<------><------><------>/*
<------><------><------> * If the memory allocation failed, the context alloc
<------><------><------> * also would have failed, so we would never get here
<------><------><------> */
<------><------><------>ret = -EINVAL;
<------><------><------>goto done;
<------><------>}
<------><------>if ((flags & VM_WRITE) || !hfi1_rcvhdrtail_kvaddr(uctxt)) {
<------><------><------>ret = -EPERM;
<------><------><------>goto done;
<------><------>}
<------><------>memlen = PAGE_SIZE;
<------><------>memvirt = (void *)hfi1_rcvhdrtail_kvaddr(uctxt);
<------><------>flags &= ~VM_MAYWRITE;
<------><------>break;
<------>case SUBCTXT_UREGS:
<------><------>memaddr = (u64)uctxt->subctxt_uregbase;
<------><------>memlen = PAGE_SIZE;
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>vmf = 1;
<------><------>break;
<------>case SUBCTXT_RCV_HDRQ:
<------><------>memaddr = (u64)uctxt->subctxt_rcvhdr_base;
<------><------>memlen = rcvhdrq_size(uctxt) * uctxt->subctxt_cnt;
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>vmf = 1;
<------><------>break;
<------>case SUBCTXT_EGRBUF:
<------><------>memaddr = (u64)uctxt->subctxt_rcvegrbuf;
<------><------>memlen = uctxt->egrbufs.size * uctxt->subctxt_cnt;
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>flags &= ~VM_MAYWRITE;
<------><------>vmf = 1;
<------><------>break;
<------>case SDMA_COMP: {
<------><------>struct hfi1_user_sdma_comp_q *cq = fd->cq;
<------><------>if (!cq) {
<------><------><------>ret = -EFAULT;
<------><------><------>goto done;
<------><------>}
<------><------>memaddr = (u64)cq->comps;
<------><------>memlen = PAGE_ALIGN(sizeof(*cq->comps) * cq->nentries);
<------><------>flags |= VM_IO | VM_DONTEXPAND;
<------><------>vmf = 1;
<------><------>break;
<------>}
<------>default:
<------><------>ret = -EINVAL;
<------><------>break;
<------>}
<------>if ((vma->vm_end - vma->vm_start) != memlen) {
<------><------>hfi1_cdbg(PROC, "%u:%u Memory size mismatch %lu:%lu",
<------><------><------> uctxt->ctxt, fd->subctxt,
<------><------><------> (vma->vm_end - vma->vm_start), memlen);
<------><------>ret = -EINVAL;
<------><------>goto done;
<------>}
<------>vma->vm_flags = flags;
<------>hfi1_cdbg(PROC,
<------><------> "%u:%u type:%u io/vf:%d/%d, addr:0x%llx, len:%lu(%lu), flags:0x%lx\n",
<------><------> ctxt, subctxt, type, mapio, vmf, memaddr, memlen,
<------><------> vma->vm_end - vma->vm_start, vma->vm_flags);
<------>if (vmf) {
<------><------>vma->vm_pgoff = PFN_DOWN(memaddr);
<------><------>vma->vm_ops = &vm_ops;
<------><------>ret = 0;
<------>} else if (mapio) {
<------><------>ret = io_remap_pfn_range(vma, vma->vm_start,
<------><------><------><------><------> PFN_DOWN(memaddr),
<------><------><------><------><------> memlen,
<------><------><------><------><------> vma->vm_page_prot);
<------>} else if (memvirt) {
<------><------>ret = remap_pfn_range(vma, vma->vm_start,
<------><------><------><------> PFN_DOWN(__pa(memvirt)),
<------><------><------><------> memlen,
<------><------><------><------> vma->vm_page_prot);
<------>} else {
<------><------>ret = remap_pfn_range(vma, vma->vm_start,
<------><------><------><------> PFN_DOWN(memaddr),
<------><------><------><------> memlen,
<------><------><------><------> vma->vm_page_prot);
<------>}
done:
<------>return ret;
}
/*
* Local (non-chip) user memory is not mapped right away but as it is
* accessed by the user-level code.
*/
static vm_fault_t vma_fault(struct vm_fault *vmf)
{
<------>struct page *page;
<------>page = vmalloc_to_page((void *)(vmf->pgoff << PAGE_SHIFT));
<------>if (!page)
<------><------>return VM_FAULT_SIGBUS;
<------>get_page(page);
<------>vmf->page = page;
<------>return 0;
}
static __poll_t hfi1_poll(struct file *fp, struct poll_table_struct *pt)
{
<------>struct hfi1_ctxtdata *uctxt;
<------>__poll_t pollflag;
<------>uctxt = ((struct hfi1_filedata *)fp->private_data)->uctxt;
<------>if (!uctxt)
<------><------>pollflag = EPOLLERR;
<------>else if (uctxt->poll_type == HFI1_POLL_TYPE_URGENT)
<------><------>pollflag = poll_urgent(fp, pt);
<------>else if (uctxt->poll_type == HFI1_POLL_TYPE_ANYRCV)
<------><------>pollflag = poll_next(fp, pt);
<------>else /* invalid */
<------><------>pollflag = EPOLLERR;
<------>return pollflag;
}
static int hfi1_file_close(struct inode *inode, struct file *fp)
{
<------>struct hfi1_filedata *fdata = fp->private_data;
<------>struct hfi1_ctxtdata *uctxt = fdata->uctxt;
<------>struct hfi1_devdata *dd = container_of(inode->i_cdev,
<------><------><------><------><------> struct hfi1_devdata,
<------><------><------><------><------> user_cdev);
<------>unsigned long flags, *ev;
<------>fp->private_data = NULL;
<------>if (!uctxt)
<------><------>goto done;
<------>hfi1_cdbg(PROC, "closing ctxt %u:%u", uctxt->ctxt, fdata->subctxt);
<------>flush_wc();
<------>/* drain user sdma queue */
<------>hfi1_user_sdma_free_queues(fdata, uctxt);
<------>/* release the cpu */
<------>hfi1_put_proc_affinity(fdata->rec_cpu_num);
<------>/* clean up rcv side */
<------>hfi1_user_exp_rcv_free(fdata);
<------>/*
<------> * fdata->uctxt is used in the above cleanup. It is not ready to be
<------> * removed until here.
<------> */
<------>fdata->uctxt = NULL;
<------>hfi1_rcd_put(uctxt);
<------>/*
<------> * Clear any left over, unhandled events so the next process that
<------> * gets this context doesn't get confused.
<------> */
<------>ev = dd->events + uctxt_offset(uctxt) + fdata->subctxt;
<------>*ev = 0;
<------>spin_lock_irqsave(&dd->uctxt_lock, flags);
<------>__clear_bit(fdata->subctxt, uctxt->in_use_ctxts);
<------>if (!bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) {
<------><------>spin_unlock_irqrestore(&dd->uctxt_lock, flags);
<------><------>goto done;
<------>}
<------>spin_unlock_irqrestore(&dd->uctxt_lock, flags);
<------>/*
<------> * Disable receive context and interrupt available, reset all
<------> * RcvCtxtCtrl bits to default values.
<------> */
<------>hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
<------><------> HFI1_RCVCTRL_TIDFLOW_DIS |
<------><------> HFI1_RCVCTRL_INTRAVAIL_DIS |
<------><------> HFI1_RCVCTRL_TAILUPD_DIS |
<------><------> HFI1_RCVCTRL_ONE_PKT_EGR_DIS |
<------><------> HFI1_RCVCTRL_NO_RHQ_DROP_DIS |
<------><------> HFI1_RCVCTRL_NO_EGR_DROP_DIS |
<------><------> HFI1_RCVCTRL_URGENT_DIS, uctxt);
<------>/* Clear the context's J_KEY */
<------>hfi1_clear_ctxt_jkey(dd, uctxt);
<------>/*
<------> * If a send context is allocated, reset context integrity
<------> * checks to default and disable the send context.
<------> */
<------>if (uctxt->sc) {
<------><------>sc_disable(uctxt->sc);
<------><------>set_pio_integrity(uctxt->sc);
<------>}
<------>hfi1_free_ctxt_rcv_groups(uctxt);
<------>hfi1_clear_ctxt_pkey(dd, uctxt);
<------>uctxt->event_flags = 0;
<------>deallocate_ctxt(uctxt);
done:
<------>if (atomic_dec_and_test(&dd->user_refcount))
<------><------>complete(&dd->user_comp);
<------>cleanup_srcu_struct(&fdata->pq_srcu);
<------>kfree(fdata);
<------>return 0;
}
/*
* Convert kernel *virtual* addresses to physical addresses.
* This is used to vmalloc'ed addresses.
*/
static u64 kvirt_to_phys(void *addr)
{
<------>struct page *page;
<------>u64 paddr = 0;
<------>page = vmalloc_to_page(addr);
<------>if (page)
<------><------>paddr = page_to_pfn(page) << PAGE_SHIFT;
<------>return paddr;
}
/**
* complete_subctxt
* @fd: valid filedata pointer
*
* Sub-context info can only be set up after the base context
* has been completed. This is indicated by the clearing of the
* HFI1_CTXT_BASE_UINIT bit.
*
* Wait for the bit to be cleared, and then complete the subcontext
* initialization.
*
*/
static int complete_subctxt(struct hfi1_filedata *fd)
{
<------>int ret;
<------>unsigned long flags;
<------>/*
<------> * sub-context info can only be set up after the base context
<------> * has been completed.
<------> */
<------>ret = wait_event_interruptible(
<------><------>fd->uctxt->wait,
<------><------>!test_bit(HFI1_CTXT_BASE_UNINIT, &fd->uctxt->event_flags));
<------>if (test_bit(HFI1_CTXT_BASE_FAILED, &fd->uctxt->event_flags))
<------><------>ret = -ENOMEM;
<------>/* Finish the sub-context init */
<------>if (!ret) {
<------><------>fd->rec_cpu_num = hfi1_get_proc_affinity(fd->uctxt->numa_id);
<------><------>ret = init_user_ctxt(fd, fd->uctxt);
<------>}
<------>if (ret) {
<------><------>spin_lock_irqsave(&fd->dd->uctxt_lock, flags);
<------><------>__clear_bit(fd->subctxt, fd->uctxt->in_use_ctxts);
<------><------>spin_unlock_irqrestore(&fd->dd->uctxt_lock, flags);
<------><------>hfi1_rcd_put(fd->uctxt);
<------><------>fd->uctxt = NULL;
<------>}
<------>return ret;
}
static int assign_ctxt(struct hfi1_filedata *fd, unsigned long arg, u32 len)
{
<------>int ret;
<------>unsigned int swmajor;
<------>struct hfi1_ctxtdata *uctxt = NULL;
<------>struct hfi1_user_info uinfo;
<------>if (fd->uctxt)
<------><------>return -EINVAL;
<------>if (sizeof(uinfo) != len)
<------><------>return -EINVAL;
<------>if (copy_from_user(&uinfo, (void __user *)arg, sizeof(uinfo)))
<------><------>return -EFAULT;
<------>swmajor = uinfo.userversion >> 16;
<------>if (swmajor != HFI1_USER_SWMAJOR)
<------><------>return -ENODEV;
<------>if (uinfo.subctxt_cnt > HFI1_MAX_SHARED_CTXTS)
<------><------>return -EINVAL;
<------>/*
<------> * Acquire the mutex to protect against multiple creations of what
<------> * could be a shared base context.
<------> */
<------>mutex_lock(&hfi1_mutex);
<------>/*
<------> * Get a sub context if available (fd->uctxt will be set).
<------> * ret < 0 error, 0 no context, 1 sub-context found
<------> */
<------>ret = find_sub_ctxt(fd, &uinfo);
<------>/*
<------> * Allocate a base context if context sharing is not required or a
<------> * sub context wasn't found.
<------> */
<------>if (!ret)
<------><------>ret = allocate_ctxt(fd, fd->dd, &uinfo, &uctxt);
<------>mutex_unlock(&hfi1_mutex);
<------>/* Depending on the context type, finish the appropriate init */
<------>switch (ret) {
<------>case 0:
<------><------>ret = setup_base_ctxt(fd, uctxt);
<------><------>if (ret)
<------><------><------>deallocate_ctxt(uctxt);
<------><------>break;
<------>case 1:
<------><------>ret = complete_subctxt(fd);
<------><------>break;
<------>default:
<------><------>break;
<------>}
<------>return ret;
}
/**
* match_ctxt
* @fd: valid filedata pointer
* @uinfo: user info to compare base context with
* @uctxt: context to compare uinfo to.
*
* Compare the given context with the given information to see if it
* can be used for a sub context.
*/
static int match_ctxt(struct hfi1_filedata *fd,
<------><------> const struct hfi1_user_info *uinfo,
<------><------> struct hfi1_ctxtdata *uctxt)
{
<------>struct hfi1_devdata *dd = fd->dd;
<------>unsigned long flags;
<------>u16 subctxt;
<------>/* Skip dynamically allocated kernel contexts */
<------>if (uctxt->sc && (uctxt->sc->type == SC_KERNEL))
<------><------>return 0;
<------>/* Skip ctxt if it doesn't match the requested one */
<------>if (memcmp(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid)) ||
<------> uctxt->jkey != generate_jkey(current_uid()) ||
<------> uctxt->subctxt_id != uinfo->subctxt_id ||
<------> uctxt->subctxt_cnt != uinfo->subctxt_cnt)
<------><------>return 0;
<------>/* Verify the sharing process matches the base */
<------>if (uctxt->userversion != uinfo->userversion)
<------><------>return -EINVAL;
<------>/* Find an unused sub context */
<------>spin_lock_irqsave(&dd->uctxt_lock, flags);
<------>if (bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) {
<------><------>/* context is being closed, do not use */
<------><------>spin_unlock_irqrestore(&dd->uctxt_lock, flags);
<------><------>return 0;
<------>}
<------>subctxt = find_first_zero_bit(uctxt->in_use_ctxts,
<------><------><------><------> HFI1_MAX_SHARED_CTXTS);
<------>if (subctxt >= uctxt->subctxt_cnt) {
<------><------>spin_unlock_irqrestore(&dd->uctxt_lock, flags);
<------><------>return -EBUSY;
<------>}
<------>fd->subctxt = subctxt;
<------>__set_bit(fd->subctxt, uctxt->in_use_ctxts);
<------>spin_unlock_irqrestore(&dd->uctxt_lock, flags);
<------>fd->uctxt = uctxt;
<------>hfi1_rcd_get(uctxt);
<------>return 1;
}
/**
* find_sub_ctxt
* @fd: valid filedata pointer
* @uinfo: matching info to use to find a possible context to share.
*
* The hfi1_mutex must be held when this function is called. It is
* necessary to ensure serialized creation of shared contexts.
*
* Return:
* 0 No sub-context found
* 1 Subcontext found and allocated
* errno EINVAL (incorrect parameters)
* EBUSY (all sub contexts in use)
*/
static int find_sub_ctxt(struct hfi1_filedata *fd,
<------><------><------> const struct hfi1_user_info *uinfo)
{
<------>struct hfi1_ctxtdata *uctxt;
<------>struct hfi1_devdata *dd = fd->dd;
<------>u16 i;
<------>int ret;
<------>if (!uinfo->subctxt_cnt)
<------><------>return 0;
<------>for (i = dd->first_dyn_alloc_ctxt; i < dd->num_rcv_contexts; i++) {
<------><------>uctxt = hfi1_rcd_get_by_index(dd, i);
<------><------>if (uctxt) {
<------><------><------>ret = match_ctxt(fd, uinfo, uctxt);
<------><------><------>hfi1_rcd_put(uctxt);
<------><------><------>/* value of != 0 will return */
<------><------><------>if (ret)
<------><------><------><------>return ret;
<------><------>}
<------>}
<------>return 0;
}
static int allocate_ctxt(struct hfi1_filedata *fd, struct hfi1_devdata *dd,
<------><------><------> struct hfi1_user_info *uinfo,
<------><------><------> struct hfi1_ctxtdata **rcd)
{
<------>struct hfi1_ctxtdata *uctxt;
<------>int ret, numa;
<------>if (dd->flags & HFI1_FROZEN) {
<------><------>/*
<------><------> * Pick an error that is unique from all other errors
<------><------> * that are returned so the user process knows that
<------><------> * it tried to allocate while the SPC was frozen. It
<------><------> * it should be able to retry with success in a short
<------><------> * while.
<------><------> */
<------><------>return -EIO;
<------>}
<------>if (!dd->freectxts)
<------><------>return -EBUSY;
<------>/*
<------> * If we don't have a NUMA node requested, preference is towards
<------> * device NUMA node.
<------> */
<------>fd->rec_cpu_num = hfi1_get_proc_affinity(dd->node);
<------>if (fd->rec_cpu_num != -1)
<------><------>numa = cpu_to_node(fd->rec_cpu_num);
<------>else
<------><------>numa = numa_node_id();
<------>ret = hfi1_create_ctxtdata(dd->pport, numa, &uctxt);
<------>if (ret < 0) {
<------><------>dd_dev_err(dd, "user ctxtdata allocation failed\n");
<------><------>return ret;
<------>}
<------>hfi1_cdbg(PROC, "[%u:%u] pid %u assigned to CPU %d (NUMA %u)",
<------><------> uctxt->ctxt, fd->subctxt, current->pid, fd->rec_cpu_num,
<------><------> uctxt->numa_id);
<------>/*
<------> * Allocate and enable a PIO send context.
<------> */
<------>uctxt->sc = sc_alloc(dd, SC_USER, uctxt->rcvhdrqentsize, dd->node);
<------>if (!uctxt->sc) {
<------><------>ret = -ENOMEM;
<------><------>goto ctxdata_free;
<------>}
<------>hfi1_cdbg(PROC, "allocated send context %u(%u)\n", uctxt->sc->sw_index,
<------><------> uctxt->sc->hw_context);
<------>ret = sc_enable(uctxt->sc);
<------>if (ret)
<------><------>goto ctxdata_free;
<------>/*
<------> * Setup sub context information if the user-level has requested
<------> * sub contexts.
<------> * This has to be done here so the rest of the sub-contexts find the
<------> * proper base context.
<------> * NOTE: _set_bit() can be used here because the context creation is
<------> * protected by the mutex (rather than the spin_lock), and will be the
<------> * very first instance of this context.
<------> */
<------>__set_bit(0, uctxt->in_use_ctxts);
<------>if (uinfo->subctxt_cnt)
<------><------>init_subctxts(uctxt, uinfo);
<------>uctxt->userversion = uinfo->userversion;
<------>uctxt->flags = hfi1_cap_mask; /* save current flag state */
<------>init_waitqueue_head(&uctxt->wait);
<------>strlcpy(uctxt->comm, current->comm, sizeof(uctxt->comm));
<------>memcpy(uctxt->uuid, uinfo->uuid, sizeof(uctxt->uuid));
<------>uctxt->jkey = generate_jkey(current_uid());
<------>hfi1_stats.sps_ctxts++;
<------>/*
<------> * Disable ASPM when there are open user/PSM contexts to avoid
<------> * issues with ASPM L1 exit latency
<------> */
<------>if (dd->freectxts-- == dd->num_user_contexts)
<------><------>aspm_disable_all(dd);
<------>*rcd = uctxt;
<------>return 0;
ctxdata_free:
<------>hfi1_free_ctxt(uctxt);
<------>return ret;
}
static void deallocate_ctxt(struct hfi1_ctxtdata *uctxt)
{
<------>mutex_lock(&hfi1_mutex);
<------>hfi1_stats.sps_ctxts--;
<------>if (++uctxt->dd->freectxts == uctxt->dd->num_user_contexts)
<------><------>aspm_enable_all(uctxt->dd);
<------>mutex_unlock(&hfi1_mutex);
<------>hfi1_free_ctxt(uctxt);
}
static void init_subctxts(struct hfi1_ctxtdata *uctxt,
<------><------><------> const struct hfi1_user_info *uinfo)
{
<------>uctxt->subctxt_cnt = uinfo->subctxt_cnt;
<------>uctxt->subctxt_id = uinfo->subctxt_id;
<------>set_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags);
}
static int setup_subctxt(struct hfi1_ctxtdata *uctxt)
{
<------>int ret = 0;
<------>u16 num_subctxts = uctxt->subctxt_cnt;
<------>uctxt->subctxt_uregbase = vmalloc_user(PAGE_SIZE);
<------>if (!uctxt->subctxt_uregbase)
<------><------>return -ENOMEM;
<------>/* We can take the size of the RcvHdr Queue from the master */
<------>uctxt->subctxt_rcvhdr_base = vmalloc_user(rcvhdrq_size(uctxt) *
<------><------><------><------><------><------> num_subctxts);
<------>if (!uctxt->subctxt_rcvhdr_base) {
<------><------>ret = -ENOMEM;
<------><------>goto bail_ureg;
<------>}
<------>uctxt->subctxt_rcvegrbuf = vmalloc_user(uctxt->egrbufs.size *
<------><------><------><------><------><------>num_subctxts);
<------>if (!uctxt->subctxt_rcvegrbuf) {
<------><------>ret = -ENOMEM;
<------><------>goto bail_rhdr;
<------>}
<------>return 0;
bail_rhdr:
<------>vfree(uctxt->subctxt_rcvhdr_base);
<------>uctxt->subctxt_rcvhdr_base = NULL;
bail_ureg:
<------>vfree(uctxt->subctxt_uregbase);
<------>uctxt->subctxt_uregbase = NULL;
<------>return ret;
}
static void user_init(struct hfi1_ctxtdata *uctxt)
{
<------>unsigned int rcvctrl_ops = 0;
<------>/* initialize poll variables... */
<------>uctxt->urgent = 0;
<------>uctxt->urgent_poll = 0;
<------>/*
<------> * Now enable the ctxt for receive.
<------> * For chips that are set to DMA the tail register to memory
<------> * when they change (and when the update bit transitions from
<------> * 0 to 1. So for those chips, we turn it off and then back on.
<------> * This will (very briefly) affect any other open ctxts, but the
<------> * duration is very short, and therefore isn't an issue. We
<------> * explicitly set the in-memory tail copy to 0 beforehand, so we
<------> * don't have to wait to be sure the DMA update has happened
<------> * (chip resets head/tail to 0 on transition to enable).
<------> */
<------>if (hfi1_rcvhdrtail_kvaddr(uctxt))
<------><------>clear_rcvhdrtail(uctxt);
<------>/* Setup J_KEY before enabling the context */
<------>hfi1_set_ctxt_jkey(uctxt->dd, uctxt, uctxt->jkey);
<------>rcvctrl_ops = HFI1_RCVCTRL_CTXT_ENB;
<------>rcvctrl_ops |= HFI1_RCVCTRL_URGENT_ENB;
<------>if (HFI1_CAP_UGET_MASK(uctxt->flags, HDRSUPP))
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_TIDFLOW_ENB;
<------>/*
<------> * Ignore the bit in the flags for now until proper
<------> * support for multiple packet per rcv array entry is
<------> * added.
<------> */
<------>if (!HFI1_CAP_UGET_MASK(uctxt->flags, MULTI_PKT_EGR))
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
<------>if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_EGR_FULL))
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
<------>if (HFI1_CAP_UGET_MASK(uctxt->flags, NODROP_RHQ_FULL))
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
<------>/*
<------> * The RcvCtxtCtrl.TailUpd bit has to be explicitly written.
<------> * We can't rely on the correct value to be set from prior
<------> * uses of the chip or ctxt. Therefore, add the rcvctrl op
<------> * for both cases.
<------> */
<------>if (HFI1_CAP_UGET_MASK(uctxt->flags, DMA_RTAIL))
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_ENB;
<------>else
<------><------>rcvctrl_ops |= HFI1_RCVCTRL_TAILUPD_DIS;
<------>hfi1_rcvctrl(uctxt->dd, rcvctrl_ops, uctxt);
}
static int get_ctxt_info(struct hfi1_filedata *fd, unsigned long arg, u32 len)
{
<------>struct hfi1_ctxt_info cinfo;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>if (sizeof(cinfo) != len)
<------><------>return -EINVAL;
<------>memset(&cinfo, 0, sizeof(cinfo));
<------>cinfo.runtime_flags = (((uctxt->flags >> HFI1_CAP_MISC_SHIFT) &
<------><------><------><------>HFI1_CAP_MISC_MASK) << HFI1_CAP_USER_SHIFT) |
<------><------><------>HFI1_CAP_UGET_MASK(uctxt->flags, MASK) |
<------><------><------>HFI1_CAP_KGET_MASK(uctxt->flags, K2U);
<------>/* adjust flag if this fd is not able to cache */
<------>if (!fd->use_mn)
<------><------>cinfo.runtime_flags |= HFI1_CAP_TID_UNMAP; /* no caching */
<------>cinfo.num_active = hfi1_count_active_units();
<------>cinfo.unit = uctxt->dd->unit;
<------>cinfo.ctxt = uctxt->ctxt;
<------>cinfo.subctxt = fd->subctxt;
<------>cinfo.rcvtids = roundup(uctxt->egrbufs.alloced,
<------><------><------><------>uctxt->dd->rcv_entries.group_size) +
<------><------>uctxt->expected_count;
<------>cinfo.credits = uctxt->sc->credits;
<------>cinfo.numa_node = uctxt->numa_id;
<------>cinfo.rec_cpu = fd->rec_cpu_num;
<------>cinfo.send_ctxt = uctxt->sc->hw_context;
<------>cinfo.egrtids = uctxt->egrbufs.alloced;
<------>cinfo.rcvhdrq_cnt = get_hdrq_cnt(uctxt);
<------>cinfo.rcvhdrq_entsize = get_hdrqentsize(uctxt) << 2;
<------>cinfo.sdma_ring_size = fd->cq->nentries;
<------>cinfo.rcvegr_size = uctxt->egrbufs.rcvtid_size;
<------>trace_hfi1_ctxt_info(uctxt->dd, uctxt->ctxt, fd->subctxt, &cinfo);
<------>if (copy_to_user((void __user *)arg, &cinfo, len))
<------><------>return -EFAULT;
<------>return 0;
}
static int init_user_ctxt(struct hfi1_filedata *fd,
<------><------><------> struct hfi1_ctxtdata *uctxt)
{
<------>int ret;
<------>ret = hfi1_user_sdma_alloc_queues(uctxt, fd);
<------>if (ret)
<------><------>return ret;
<------>ret = hfi1_user_exp_rcv_init(fd, uctxt);
<------>if (ret)
<------><------>hfi1_user_sdma_free_queues(fd, uctxt);
<------>return ret;
}
static int setup_base_ctxt(struct hfi1_filedata *fd,
<------><------><------> struct hfi1_ctxtdata *uctxt)
{
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>int ret = 0;
<------>hfi1_init_ctxt(uctxt->sc);
<------>/* Now allocate the RcvHdr queue and eager buffers. */
<------>ret = hfi1_create_rcvhdrq(dd, uctxt);
<------>if (ret)
<------><------>goto done;
<------>ret = hfi1_setup_eagerbufs(uctxt);
<------>if (ret)
<------><------>goto done;
<------>/* If sub-contexts are enabled, do the appropriate setup */
<------>if (uctxt->subctxt_cnt)
<------><------>ret = setup_subctxt(uctxt);
<------>if (ret)
<------><------>goto done;
<------>ret = hfi1_alloc_ctxt_rcv_groups(uctxt);
<------>if (ret)
<------><------>goto done;
<------>ret = init_user_ctxt(fd, uctxt);
<------>if (ret)
<------><------>goto done;
<------>user_init(uctxt);
<------>/* Now that the context is set up, the fd can get a reference. */
<------>fd->uctxt = uctxt;
<------>hfi1_rcd_get(uctxt);
done:
<------>if (uctxt->subctxt_cnt) {
<------><------>/*
<------><------> * On error, set the failed bit so sub-contexts will clean up
<------><------> * correctly.
<------><------> */
<------><------>if (ret)
<------><------><------>set_bit(HFI1_CTXT_BASE_FAILED, &uctxt->event_flags);
<------><------>/*
<------><------> * Base context is done (successfully or not), notify anybody
<------><------> * using a sub-context that is waiting for this completion.
<------><------> */
<------><------>clear_bit(HFI1_CTXT_BASE_UNINIT, &uctxt->event_flags);
<------><------>wake_up(&uctxt->wait);
<------>}
<------>return ret;
}
static int get_base_info(struct hfi1_filedata *fd, unsigned long arg, u32 len)
{
<------>struct hfi1_base_info binfo;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>unsigned offset;
<------>trace_hfi1_uctxtdata(uctxt->dd, uctxt, fd->subctxt);
<------>if (sizeof(binfo) != len)
<------><------>return -EINVAL;
<------>memset(&binfo, 0, sizeof(binfo));
<------>binfo.hw_version = dd->revision;
<------>binfo.sw_version = HFI1_KERN_SWVERSION;
<------>binfo.bthqp = RVT_KDETH_QP_PREFIX;
<------>binfo.jkey = uctxt->jkey;
<------>/*
<------> * If more than 64 contexts are enabled the allocated credit
<------> * return will span two or three contiguous pages. Since we only
<------> * map the page containing the context's credit return address,
<------> * we need to calculate the offset in the proper page.
<------> */
<------>offset = ((u64)uctxt->sc->hw_free -
<------><------> (u64)dd->cr_base[uctxt->numa_id].va) % PAGE_SIZE;
<------>binfo.sc_credits_addr = HFI1_MMAP_TOKEN(PIO_CRED, uctxt->ctxt,
<------><------><------><------><------><------>fd->subctxt, offset);
<------>binfo.pio_bufbase = HFI1_MMAP_TOKEN(PIO_BUFS, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt,
<------><------><------><------><------> uctxt->sc->base_addr);
<------>binfo.pio_bufbase_sop = HFI1_MMAP_TOKEN(PIO_BUFS_SOP,
<------><------><------><------><------><------>uctxt->ctxt,
<------><------><------><------><------><------>fd->subctxt,
<------><------><------><------><------><------>uctxt->sc->base_addr);
<------>binfo.rcvhdr_bufbase = HFI1_MMAP_TOKEN(RCV_HDRQ, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt,
<------><------><------><------><------> uctxt->rcvhdrq);
<------>binfo.rcvegr_bufbase = HFI1_MMAP_TOKEN(RCV_EGRBUF, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt,
<------><------><------><------><------> uctxt->egrbufs.rcvtids[0].dma);
<------>binfo.sdma_comp_bufbase = HFI1_MMAP_TOKEN(SDMA_COMP, uctxt->ctxt,
<------><------><------><------><------><------> fd->subctxt, 0);
<------>/*
<------> * user regs are at
<------> * (RXE_PER_CONTEXT_USER + (ctxt * RXE_PER_CONTEXT_SIZE))
<------> */
<------>binfo.user_regbase = HFI1_MMAP_TOKEN(UREGS, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt, 0);
<------>offset = offset_in_page((uctxt_offset(uctxt) + fd->subctxt) *
<------><------><------><------>sizeof(*dd->events));
<------>binfo.events_bufbase = HFI1_MMAP_TOKEN(EVENTS, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt,
<------><------><------><------><------> offset);
<------>binfo.status_bufbase = HFI1_MMAP_TOKEN(STATUS, uctxt->ctxt,
<------><------><------><------><------> fd->subctxt,
<------><------><------><------><------> dd->status);
<------>if (HFI1_CAP_IS_USET(DMA_RTAIL))
<------><------>binfo.rcvhdrtail_base = HFI1_MMAP_TOKEN(RTAIL, uctxt->ctxt,
<------><------><------><------><------><------><------>fd->subctxt, 0);
<------>if (uctxt->subctxt_cnt) {
<------><------>binfo.subctxt_uregbase = HFI1_MMAP_TOKEN(SUBCTXT_UREGS,
<------><------><------><------><------><------><------> uctxt->ctxt,
<------><------><------><------><------><------><------> fd->subctxt, 0);
<------><------>binfo.subctxt_rcvhdrbuf = HFI1_MMAP_TOKEN(SUBCTXT_RCV_HDRQ,
<------><------><------><------><------><------><------> uctxt->ctxt,
<------><------><------><------><------><------><------> fd->subctxt, 0);
<------><------>binfo.subctxt_rcvegrbuf = HFI1_MMAP_TOKEN(SUBCTXT_EGRBUF,
<------><------><------><------><------><------><------> uctxt->ctxt,
<------><------><------><------><------><------><------> fd->subctxt, 0);
<------>}
<------>if (copy_to_user((void __user *)arg, &binfo, len))
<------><------>return -EFAULT;
<------>return 0;
}
/**
* user_exp_rcv_setup - Set up the given tid rcv list
* @fd: file data of the current driver instance
* @arg: ioctl argumnent for user space information
* @len: length of data structure associated with ioctl command
*
* Wrapper to validate ioctl information before doing _rcv_setup.
*
*/
static int user_exp_rcv_setup(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------> u32 len)
{
<------>int ret;
<------>unsigned long addr;
<------>struct hfi1_tid_info tinfo;
<------>if (sizeof(tinfo) != len)
<------><------>return -EINVAL;
<------>if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo))))
<------><------>return -EFAULT;
<------>ret = hfi1_user_exp_rcv_setup(fd, &tinfo);
<------>if (!ret) {
<------><------>/*
<------><------> * Copy the number of tidlist entries we used
<------><------> * and the length of the buffer we registered.
<------><------> */
<------><------>addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
<------><------>if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
<------><------><------><------> sizeof(tinfo.tidcnt)))
<------><------><------>return -EFAULT;
<------><------>addr = arg + offsetof(struct hfi1_tid_info, length);
<------><------>if (copy_to_user((void __user *)addr, &tinfo.length,
<------><------><------><------> sizeof(tinfo.length)))
<------><------><------>ret = -EFAULT;
<------>}
<------>return ret;
}
/**
* user_exp_rcv_clear - Clear the given tid rcv list
* @fd: file data of the current driver instance
* @arg: ioctl argumnent for user space information
* @len: length of data structure associated with ioctl command
*
* The hfi1_user_exp_rcv_clear() can be called from the error path. Because
* of this, we need to use this wrapper to copy the user space information
* before doing the clear.
*/
static int user_exp_rcv_clear(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------> u32 len)
{
<------>int ret;
<------>unsigned long addr;
<------>struct hfi1_tid_info tinfo;
<------>if (sizeof(tinfo) != len)
<------><------>return -EINVAL;
<------>if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo))))
<------><------>return -EFAULT;
<------>ret = hfi1_user_exp_rcv_clear(fd, &tinfo);
<------>if (!ret) {
<------><------>addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
<------><------>if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
<------><------><------><------> sizeof(tinfo.tidcnt)))
<------><------><------>return -EFAULT;
<------>}
<------>return ret;
}
/**
* user_exp_rcv_invalid - Invalidate the given tid rcv list
* @fd: file data of the current driver instance
* @arg: ioctl argumnent for user space information
* @len: length of data structure associated with ioctl command
*
* Wrapper to validate ioctl information before doing _rcv_invalid.
*
*/
static int user_exp_rcv_invalid(struct hfi1_filedata *fd, unsigned long arg,
<------><------><------><------>u32 len)
{
<------>int ret;
<------>unsigned long addr;
<------>struct hfi1_tid_info tinfo;
<------>if (sizeof(tinfo) != len)
<------><------>return -EINVAL;
<------>if (!fd->invalid_tids)
<------><------>return -EINVAL;
<------>if (copy_from_user(&tinfo, (void __user *)arg, (sizeof(tinfo))))
<------><------>return -EFAULT;
<------>ret = hfi1_user_exp_rcv_invalid(fd, &tinfo);
<------>if (ret)
<------><------>return ret;
<------>addr = arg + offsetof(struct hfi1_tid_info, tidcnt);
<------>if (copy_to_user((void __user *)addr, &tinfo.tidcnt,
<------><------><------> sizeof(tinfo.tidcnt)))
<------><------>ret = -EFAULT;
<------>return ret;
}
static __poll_t poll_urgent(struct file *fp,
<------><------><------><------>struct poll_table_struct *pt)
{
<------>struct hfi1_filedata *fd = fp->private_data;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>__poll_t pollflag;
<------>poll_wait(fp, &uctxt->wait, pt);
<------>spin_lock_irq(&dd->uctxt_lock);
<------>if (uctxt->urgent != uctxt->urgent_poll) {
<------><------>pollflag = EPOLLIN | EPOLLRDNORM;
<------><------>uctxt->urgent_poll = uctxt->urgent;
<------>} else {
<------><------>pollflag = 0;
<------><------>set_bit(HFI1_CTXT_WAITING_URG, &uctxt->event_flags);
<------>}
<------>spin_unlock_irq(&dd->uctxt_lock);
<------>return pollflag;
}
static __poll_t poll_next(struct file *fp,
<------><------><------> struct poll_table_struct *pt)
{
<------>struct hfi1_filedata *fd = fp->private_data;
<------>struct hfi1_ctxtdata *uctxt = fd->uctxt;
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>__poll_t pollflag;
<------>poll_wait(fp, &uctxt->wait, pt);
<------>spin_lock_irq(&dd->uctxt_lock);
<------>if (hdrqempty(uctxt)) {
<------><------>set_bit(HFI1_CTXT_WAITING_RCV, &uctxt->event_flags);
<------><------>hfi1_rcvctrl(dd, HFI1_RCVCTRL_INTRAVAIL_ENB, uctxt);
<------><------>pollflag = 0;
<------>} else {
<------><------>pollflag = EPOLLIN | EPOLLRDNORM;
<------>}
<------>spin_unlock_irq(&dd->uctxt_lock);
<------>return pollflag;
}
/*
* Find all user contexts in use, and set the specified bit in their
* event mask.
* See also find_ctxt() for a similar use, that is specific to send buffers.
*/
int hfi1_set_uevent_bits(struct hfi1_pportdata *ppd, const int evtbit)
{
<------>struct hfi1_ctxtdata *uctxt;
<------>struct hfi1_devdata *dd = ppd->dd;
<------>u16 ctxt;
<------>if (!dd->events)
<------><------>return -EINVAL;
<------>for (ctxt = dd->first_dyn_alloc_ctxt; ctxt < dd->num_rcv_contexts;
<------> ctxt++) {
<------><------>uctxt = hfi1_rcd_get_by_index(dd, ctxt);
<------><------>if (uctxt) {
<------><------><------>unsigned long *evs;
<------><------><------>int i;
<------><------><------>/*
<------><------><------> * subctxt_cnt is 0 if not shared, so do base
<------><------><------> * separately, first, then remaining subctxt, if any
<------><------><------> */
<------><------><------>evs = dd->events + uctxt_offset(uctxt);
<------><------><------>set_bit(evtbit, evs);
<------><------><------>for (i = 1; i < uctxt->subctxt_cnt; i++)
<------><------><------><------>set_bit(evtbit, evs + i);
<------><------><------>hfi1_rcd_put(uctxt);
<------><------>}
<------>}
<------>return 0;
}
/**
* manage_rcvq - manage a context's receive queue
* @uctxt: the context
* @subctxt: the sub-context
* @start_stop: action to carry out
*
* start_stop == 0 disables receive on the context, for use in queue
* overflow conditions. start_stop==1 re-enables, to be used to
* re-init the software copy of the head register
*/
static int manage_rcvq(struct hfi1_ctxtdata *uctxt, u16 subctxt,
<------><------> unsigned long arg)
{
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>unsigned int rcvctrl_op;
<------>int start_stop;
<------>if (subctxt)
<------><------>return 0;
<------>if (get_user(start_stop, (int __user *)arg))
<------><------>return -EFAULT;
<------>/* atomically clear receive enable ctxt. */
<------>if (start_stop) {
<------><------>/*
<------><------> * On enable, force in-memory copy of the tail register to
<------><------> * 0, so that protocol code doesn't have to worry about
<------><------> * whether or not the chip has yet updated the in-memory
<------><------> * copy or not on return from the system call. The chip
<------><------> * always resets it's tail register back to 0 on a
<------><------> * transition from disabled to enabled.
<------><------> */
<------><------>if (hfi1_rcvhdrtail_kvaddr(uctxt))
<------><------><------>clear_rcvhdrtail(uctxt);
<------><------>rcvctrl_op = HFI1_RCVCTRL_CTXT_ENB;
<------>} else {
<------><------>rcvctrl_op = HFI1_RCVCTRL_CTXT_DIS;
<------>}
<------>hfi1_rcvctrl(dd, rcvctrl_op, uctxt);
<------>/* always; new head should be equal to new tail; see above */
<------>return 0;
}
/*
* clear the event notifier events for this context.
* User process then performs actions appropriate to bit having been
* set, if desired, and checks again in future.
*/
static int user_event_ack(struct hfi1_ctxtdata *uctxt, u16 subctxt,
<------><------><------> unsigned long arg)
{
<------>int i;
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>unsigned long *evs;
<------>unsigned long events;
<------>if (!dd->events)
<------><------>return 0;
<------>if (get_user(events, (unsigned long __user *)arg))
<------><------>return -EFAULT;
<------>evs = dd->events + uctxt_offset(uctxt) + subctxt;
<------>for (i = 0; i <= _HFI1_MAX_EVENT_BIT; i++) {
<------><------>if (!test_bit(i, &events))
<------><------><------>continue;
<------><------>clear_bit(i, evs);
<------>}
<------>return 0;
}
static int set_ctxt_pkey(struct hfi1_ctxtdata *uctxt, unsigned long arg)
{
<------>int i;
<------>struct hfi1_pportdata *ppd = uctxt->ppd;
<------>struct hfi1_devdata *dd = uctxt->dd;
<------>u16 pkey;
<------>if (!HFI1_CAP_IS_USET(PKEY_CHECK))
<------><------>return -EPERM;
<------>if (get_user(pkey, (u16 __user *)arg))
<------><------>return -EFAULT;
<------>if (pkey == LIM_MGMT_P_KEY || pkey == FULL_MGMT_P_KEY)
<------><------>return -EINVAL;
<------>for (i = 0; i < ARRAY_SIZE(ppd->pkeys); i++)
<------><------>if (pkey == ppd->pkeys[i])
<------><------><------>return hfi1_set_ctxt_pkey(dd, uctxt, pkey);
<------>return -ENOENT;
}
/**
* ctxt_reset - Reset the user context
* @uctxt: valid user context
*/
static int ctxt_reset(struct hfi1_ctxtdata *uctxt)
{
<------>struct send_context *sc;
<------>struct hfi1_devdata *dd;
<------>int ret = 0;
<------>if (!uctxt || !uctxt->dd || !uctxt->sc)
<------><------>return -EINVAL;
<------>/*
<------> * There is no protection here. User level has to guarantee that
<------> * no one will be writing to the send context while it is being
<------> * re-initialized. If user level breaks that guarantee, it will
<------> * break it's own context and no one else's.
<------> */
<------>dd = uctxt->dd;
<------>sc = uctxt->sc;
<------>/*
<------> * Wait until the interrupt handler has marked the context as
<------> * halted or frozen. Report error if we time out.
<------> */
<------>wait_event_interruptible_timeout(
<------><------>sc->halt_wait, (sc->flags & SCF_HALTED),
<------><------>msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
<------>if (!(sc->flags & SCF_HALTED))
<------><------>return -ENOLCK;
<------>/*
<------> * If the send context was halted due to a Freeze, wait until the
<------> * device has been "unfrozen" before resetting the context.
<------> */
<------>if (sc->flags & SCF_FROZEN) {
<------><------>wait_event_interruptible_timeout(
<------><------><------>dd->event_queue,
<------><------><------>!(READ_ONCE(dd->flags) & HFI1_FROZEN),
<------><------><------>msecs_to_jiffies(SEND_CTXT_HALT_TIMEOUT));
<------><------>if (dd->flags & HFI1_FROZEN)
<------><------><------>return -ENOLCK;
<------><------>if (dd->flags & HFI1_FORCED_FREEZE)
<------><------><------>/*
<------><------><------> * Don't allow context reset if we are into
<------><------><------> * forced freeze
<------><------><------> */
<------><------><------>return -ENODEV;
<------><------>sc_disable(sc);
<------><------>ret = sc_enable(sc);
<------><------>hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_ENB, uctxt);
<------>} else {
<------><------>ret = sc_restart(sc);
<------>}
<------>if (!ret)
<------><------>sc_return_credits(sc);
<------>return ret;
}
static void user_remove(struct hfi1_devdata *dd)
{
<------>hfi1_cdev_cleanup(&dd->user_cdev, &dd->user_device);
}
static int user_add(struct hfi1_devdata *dd)
{
<------>char name[10];
<------>int ret;
<------>snprintf(name, sizeof(name), "%s_%d", class_name(), dd->unit);
<------>ret = hfi1_cdev_init(dd->unit, name, &hfi1_file_ops,
<------><------><------> &dd->user_cdev, &dd->user_device,
<------><------><------> true, &dd->verbs_dev.rdi.ibdev.dev.kobj);
<------>if (ret)
<------><------>user_remove(dd);
<------>return ret;
}
/*
* Create per-unit files in /dev
*/
int hfi1_device_create(struct hfi1_devdata *dd)
{
<------>return user_add(dd);
}
/*
* Remove per-unit files in /dev
* void, core kernel returns no errors for this stuff
*/
void hfi1_device_remove(struct hfi1_devdata *dd)
{
<------>user_remove(dd);
}