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RDMA/hns: Use rdma_user_mmap_io

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Rely on the new core code helper to map BAR memory from the driver.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Jason Gunthorpe 2018-09-16 20:43:11 +03:00 committed by Doug Ledford
parent e2cd1d1ad2
commit 6745d356ab
2 changed files with 21 additions and 88 deletions
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8
drivers/infiniband/hw/hns/hns_roce_device.h
View File

@ -219,19 +219,11 @@ struct hns_roce_uar {
unsigned long logic_idx;
};
struct hns_roce_vma_data {
struct list_head list;
struct vm_area_struct *vma;
struct mutex *vma_list_mutex;
};
struct hns_roce_ucontext {
struct ib_ucontext ibucontext;
struct hns_roce_uar uar;
struct list_head page_list;
struct mutex page_mutex;
struct list_head vma_list;
struct mutex vma_list_mutex;
};
struct hns_roce_pd {

101
drivers/infiniband/hw/hns/hns_roce_main.c
View File

@ -344,8 +344,6 @@ static struct ib_ucontext *hns_roce_alloc_ucontext(struct ib_device *ib_dev,
if (ret)
goto error_fail_uar_alloc;
INIT_LIST_HEAD(&context->vma_list);
mutex_init(&context->vma_list_mutex);
if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RECORD_DB) {
INIT_LIST_HEAD(&context->page_list);
mutex_init(&context->page_mutex);
@ -376,76 +374,34 @@ static int hns_roce_dealloc_ucontext(struct ib_ucontext *ibcontext)
return 0;
}
static void hns_roce_vma_open(struct vm_area_struct *vma)
{
vma->vm_ops = NULL;
}
static void hns_roce_vma_close(struct vm_area_struct *vma)
{
struct hns_roce_vma_data *vma_data;
vma_data = (struct hns_roce_vma_data *)vma->vm_private_data;
vma_data->vma = NULL;
mutex_lock(vma_data->vma_list_mutex);
list_del(&vma_data->list);
mutex_unlock(vma_data->vma_list_mutex);
kfree(vma_data);
}
static const struct vm_operations_struct hns_roce_vm_ops = {
.open = hns_roce_vma_open,
.close = hns_roce_vma_close,
};
static int hns_roce_set_vma_data(struct vm_area_struct *vma,
struct hns_roce_ucontext *context)
{
struct list_head *vma_head = &context->vma_list;
struct hns_roce_vma_data *vma_data;
vma_data = kzalloc(sizeof(*vma_data), GFP_KERNEL);
if (!vma_data)
return -ENOMEM;
vma_data->vma = vma;
vma_data->vma_list_mutex = &context->vma_list_mutex;
vma->vm_private_data = vma_data;
vma->vm_ops = &hns_roce_vm_ops;
mutex_lock(&context->vma_list_mutex);
list_add(&vma_data->list, vma_head);
mutex_unlock(&context->vma_list_mutex);
return 0;
}
static int hns_roce_mmap(struct ib_ucontext *context,
struct vm_area_struct *vma)
{
struct hns_roce_dev *hr_dev = to_hr_dev(context->device);
if (((vma->vm_end - vma->vm_start) % PAGE_SIZE) != 0)
return -EINVAL;
switch (vma->vm_pgoff) {
case 0:
return rdma_user_mmap_io(context, vma,
to_hr_ucontext(context)->uar.pfn,
PAGE_SIZE,
pgprot_noncached(vma->vm_page_prot));
if (vma->vm_pgoff == 0) {
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start,
to_hr_ucontext(context)->uar.pfn,
PAGE_SIZE, vma->vm_page_prot))
return -EAGAIN;
} else if (vma->vm_pgoff == 1 && hr_dev->tptr_dma_addr &&
hr_dev->tptr_size) {
/* vm_pgoff: 1 -- TPTR */
if (io_remap_pfn_range(vma, vma->vm_start,
hr_dev->tptr_dma_addr >> PAGE_SHIFT,
hr_dev->tptr_size,
vma->vm_page_prot))
return -EAGAIN;
} else
return -EINVAL;
/* vm_pgoff: 1 -- TPTR */
case 1:
if (!hr_dev->tptr_dma_addr || !hr_dev->tptr_size)
return -EINVAL;
/*
* FIXME: using io_remap_pfn_range on the dma address returned
* by dma_alloc_coherent is totally wrong.
*/
return rdma_user_mmap_io(context, vma,
hr_dev->tptr_dma_addr >> PAGE_SHIFT,
hr_dev->tptr_size,
vma->vm_page_prot);
return hns_roce_set_vma_data(vma, to_hr_ucontext(context));
default:
return -EINVAL;
}
}
static int hns_roce_port_immutable(struct ib_device *ib_dev, u8 port_num,
@ -471,21 +427,6 @@ static int hns_roce_port_immutable(struct ib_device *ib_dev, u8 port_num,
static void hns_roce_disassociate_ucontext(struct ib_ucontext *ibcontext)
{
struct hns_roce_ucontext *context = to_hr_ucontext(ibcontext);
struct hns_roce_vma_data *vma_data, *n;
struct vm_area_struct *vma;
mutex_lock(&context->vma_list_mutex);
list_for_each_entry_safe(vma_data, n, &context->vma_list, list) {
vma = vma_data->vma;
zap_vma_ptes(vma, vma->vm_start, PAGE_SIZE);
vma->vm_flags &= ~(VM_SHARED | VM_MAYSHARE);
vma->vm_ops = NULL;
list_del(&vma_data->list);
kfree(vma_data);
}
mutex_unlock(&context->vma_list_mutex);
}
static void hns_roce_unregister_device(struct hns_roce_dev *hr_dev)