struct cxl_context *cxl_dev_context_init(struct pci_dev *dev)
{
struct cxl_afu *afu;
struct cxl_context *ctx;
int rc;
afu = cxl_pci_to_afu(dev);
if (IS_ERR(afu))
return ERR_CAST(afu);
ctx = cxl_context_alloc();
if (!ctx)
return ERR_PTR(-ENOMEM);
ctx->kernelapi = true;
/* Make it a slave context. We can promote it later? */
rc = cxl_context_init(ctx, afu, false);
if (rc)
goto err_ctx;
return ctx;
err_ctx:
kfree(ctx);
return ERR_PTR(rc);
}
static int __afu_open(struct inode *inode, struct file *file, bool master)
{
struct cxl *adapter;
struct cxl_afu *afu;
struct cxl_context *ctx;
int adapter_num = CXL_DEVT_ADAPTER(inode->i_rdev);
int slice = CXL_DEVT_AFU(inode->i_rdev);
int rc = -ENODEV;
pr_devel("afu_open afu%i.%i\n", slice, adapter_num);
if (!(adapter = get_cxl_adapter(adapter_num)))
return -ENODEV;
if (slice > adapter->slices)
goto err_put_adapter;
spin_lock(&adapter->afu_list_lock);
if (!(afu = adapter->afu[slice])) {
spin_unlock(&adapter->afu_list_lock);
goto err_put_adapter;
}
get_device(&afu->dev);
spin_unlock(&adapter->afu_list_lock);
if (!afu->current_mode)
goto err_put_afu;
if (!(ctx = cxl_context_alloc())) {
rc = -ENOMEM;
goto err_put_afu;
}
if ((rc = cxl_context_init(ctx, afu, master, inode->i_mapping)))
goto err_put_afu;
pr_devel("afu_open pe: %i\n", ctx->pe);
file->private_data = ctx;
cxl_ctx_get();
/* Our ref on the AFU will now hold the adapter */
put_device(&adapter->dev);
return 0;
err_put_afu:
put_device(&afu->dev);
err_put_adapter:
put_device(&adapter->dev);
return rc;
}
struct cxl_context *cxl_dev_context_init(struct pci_dev *dev)
{
struct address_space *mapping;
struct cxl_afu *afu;
struct cxl_context *ctx;
int rc;
afu = cxl_pci_to_afu(dev);
ctx = cxl_context_alloc();
if (IS_ERR(ctx)) {
rc = PTR_ERR(ctx);
goto err_dev;
}
ctx->kernelapi = true;
/*
* Make our own address space since we won't have one from the
* filesystem like the user api has, and even if we do associate a file
* with this context we don't want to use the global anonymous inode's
* address space as that can invalidate unrelated users:
*/
mapping = kmalloc(sizeof(struct address_space), GFP_KERNEL);
if (!mapping) {
rc = -ENOMEM;
goto err_ctx;
}
address_space_init_once(mapping);
/* Make it a slave context. We can promote it later? */
rc = cxl_context_init(ctx, afu, false, mapping);
if (rc)
goto err_mapping;
cxl_assign_psn_space(ctx);
return ctx;
err_mapping:
kfree(mapping);
err_ctx:
kfree(ctx);
err_dev:
return ERR_PTR(rc);
}
struct cxl_context *cxl_dev_context_init(struct pci_dev *dev)
{
struct cxl_afu *afu;
struct cxl_context *ctx;
int rc;
afu = cxl_pci_to_afu(dev);
get_device(&afu->dev);
ctx = cxl_context_alloc();
if (IS_ERR(ctx))
return ctx;
/* Make it a slave context. We can promote it later? */
rc = cxl_context_init(ctx, afu, false, NULL);
if (rc) {
kfree(ctx);
put_device(&afu->dev);
return ERR_PTR(-ENOMEM);
}
cxl_assign_psn_space(ctx);
return ctx;
}
static int __afu_open(struct inode *inode, struct file *file, bool master)
{
struct cxl *adapter;
struct cxl_afu *afu;
struct cxl_context *ctx;
int adapter_num = CXL_DEVT_ADAPTER(inode->i_rdev);
int slice = CXL_DEVT_AFU(inode->i_rdev);
int rc = -ENODEV;
pr_devel("afu_open afu%i.%i\n", slice, adapter_num);
if (!(adapter = get_cxl_adapter(adapter_num)))
return -ENODEV;
if (slice > adapter->slices)
goto err_put_adapter;
spin_lock(&adapter->afu_list_lock);
if (!(afu = adapter->afu[slice])) {
spin_unlock(&adapter->afu_list_lock);
goto err_put_adapter;
}
/*
* taking a ref to the afu so that it doesn't go away
* for rest of the function. This ref is released before
* we return.
*/
cxl_afu_get(afu);
spin_unlock(&adapter->afu_list_lock);
if (!afu->current_mode)
goto err_put_afu;
if (!cxl_ops->link_ok(adapter, afu)) {
rc = -EIO;
goto err_put_afu;
}
if (!(ctx = cxl_context_alloc())) {
rc = -ENOMEM;
goto err_put_afu;
}
rc = cxl_context_init(ctx, afu, master);
if (rc)
goto err_put_afu;
cxl_context_set_mapping(ctx, inode->i_mapping);
pr_devel("afu_open pe: %i\n", ctx->pe);
file->private_data = ctx;
cxl_ctx_get();
/* indicate success */
rc = 0;
err_put_afu:
/* release the ref taken earlier */
cxl_afu_put(afu);
err_put_adapter:
put_device(&adapter->dev);
return rc;
}