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| #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 |
| |
| |
| |
| |
| 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, |
| }; |
| |
| |
| |
| |
| 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 |
| }; |
| |
| |
| |
| |
| #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; |
| |
| <------> |
| |
| <------>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; |
| <------>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) + |
| <------><------><------><------> |
| <------><------><------> (uctxt->sc->hw_context * BIT(16))) + |
| <------><------><------><------> |
| <------><------><------>(type == PIO_BUFS_SOP ? |
| <------><------><------><------>(TXE_PIO_SIZE / 2) : 0); |
| <------><------> |
| <------><------> * 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? |
| <------><------> */ |
| <------><------> |
| <------><------>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; |
| } |
| |
| |
| |
| |
| |
| 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 |
| <------><------>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(); |
| <------> |
| <------>hfi1_user_sdma_free_queues(fdata, uctxt); |
| |
| <------> |
| <------>hfi1_put_proc_affinity(fdata->rec_cpu_num); |
| |
| <------> |
| <------>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); |
| <------> |
| <------>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; |
| } |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| |
| <------> |
| <------>if (uctxt->sc && (uctxt->sc->type == SC_KERNEL)) |
| <------><------>return 0; |
| |
| <------> |
| <------>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; |
| |
| <------> |
| <------>if (uctxt->userversion != uinfo->userversion) |
| <------><------>return -EINVAL; |
| |
| <------> |
| <------>spin_lock_irqsave(&dd->uctxt_lock, flags); |
| <------>if (bitmap_empty(uctxt->in_use_ctxts, HFI1_MAX_SHARED_CTXTS)) { |
| <------><------> |
| <------><------>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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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); |
| <------><------><------> |
| <------><------><------>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; |
| <------>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; |
| |
| <------> |
| <------>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; |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>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); |
| <------> |
| <------>if (!fd->use_mn) |
| <------><------>cinfo.runtime_flags |= HFI1_CAP_TID_UNMAP; |
| |
| <------>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); |
| |
| <------> |
| <------>ret = hfi1_create_rcvhdrq(dd, uctxt); |
| <------>if (ret) |
| <------><------>goto done; |
| |
| <------>ret = hfi1_setup_eagerbufs(uctxt); |
| <------>if (ret) |
| <------><------>goto done; |
| |
| <------> |
| <------>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); |
| |
| <------> |
| <------>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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| 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; |
| |
| <------> |
| <------>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); |
| <------> |
| |
| <------>return 0; |
| } |
| |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| |
| 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; |
| } |
| |
| |
| |
| |
| int hfi1_device_create(struct hfi1_devdata *dd) |
| { |
| <------>return user_add(dd); |
| } |
| |
| |
| |
| |
| |
| void hfi1_device_remove(struct hfi1_devdata *dd) |
| { |
| <------>user_remove(dd); |
| } |
| |