/*
* Map a per-context mmio space into the given vma.
*/
int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma)
{
u64 len = vma->vm_end - vma->vm_start;
len = min(len, ctx->psn_size);
if (ctx->afu->current_mode == CXL_MODE_DEDICATED) {
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return vm_iomap_memory(vma, ctx->afu->psn_phys, ctx->afu->adapter->ps_size);
}
/* make sure there is a valid per process space for this AFU */
if ((ctx->master && !ctx->afu->psa) || (!ctx->afu->pp_psa)) {
pr_devel("AFU doesn't support mmio space\n");
return -EINVAL;
}
/* Can't mmap until the AFU is enabled */
if (!ctx->afu->enabled)
return -EBUSY;
pr_devel("%s: mmio physical: %llx pe: %i master:%i\n", __func__,
ctx->psn_phys, ctx->pe , ctx->master);
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return vm_iomap_memory(vma, ctx->psn_phys, len);
}
/* Sysfs API to allow mmap of the ring buffers
* The ring buffer is allocated as contiguous memory by vmbus_open
*/
static int hv_uio_ring_mmap(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
struct vm_area_struct *vma)
{
struct vmbus_channel *channel
= container_of(kobj, struct vmbus_channel, kobj);
void *ring_buffer = page_address(channel->ringbuffer_page);
if (channel->state != CHANNEL_OPENED_STATE)
return -ENODEV;
return vm_iomap_memory(vma, virt_to_phys(ring_buffer),
channel->ringbuffer_pagecount << PAGE_SHIFT);
}
static int sprdfb_mmap(struct fb_info *info,struct vm_area_struct *vma)
{
struct sprdfb_device *dev = NULL;
if(NULL == info){
printk(KERN_ERR "sprdfb: sprdfb_ioctl error. (Invalid Parameter)");
return -1;
}
dev = info->par;
printk("sprdfb: sprdfb_mmap,vma=0x%x\n",vma);
vma->vm_page_prot = pgprot_cached(vma->vm_page_prot);
dev->ctrl->set_vma(vma);
return vm_iomap_memory(vma, info->fix.smem_start, info->fix.smem_len);
}
/* This function maps kernel space memory to user space memory. */
static int bridge_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct omap_dsp_platform_data *pdata =
omap_dspbridge_dev->dev.platform_data;
/* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
dev_dbg(bridge, "%s: vm filp %p start %lx end %lx page_prot %ulx "
"flags %lx\n", __func__, filp,
vma->vm_start, vma->vm_end, vma->vm_page_prot,
vma->vm_flags);
return vm_iomap_memory(vma,
pdata->phys_mempool_base,
pdata->phys_mempool_size);
}
static int log_buf_mmap(struct file *filp, struct vm_area_struct *vma)
{
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return vm_iomap_memory(vma, log_start, log_size);
}