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path: root/drivers/misc/cxl/file.c
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Diffstat (limited to 'drivers/misc/cxl/file.c')
-rw-r--r--drivers/misc/cxl/file.c27
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index e3f4b69527a9..a30bf285b5bd 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -73,6 +73,11 @@ static int __afu_open(struct inode *inode, struct file *file, bool master)
if (!afu->current_mode)
goto err_put_afu;
+ if (!cxl_adapter_link_ok(adapter)) {
+ rc = -EIO;
+ goto err_put_afu;
+ }
+
if (!(ctx = cxl_context_alloc())) {
rc = -ENOMEM;
goto err_put_afu;
@@ -179,6 +184,8 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
if (work.flags & CXL_START_WORK_AMR)
amr = work.amr & mfspr(SPRN_UAMOR);
+ ctx->mmio_err_ff = !!(work.flags & CXL_START_WORK_ERR_FF);
+
/*
* We grab the PID here and not in the file open to allow for the case
* where a process (master, some daemon, etc) has opened the chardev on
@@ -238,6 +245,9 @@ long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
if (ctx->status == CLOSED)
return -EIO;
+ if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ return -EIO;
+
pr_devel("afu_ioctl\n");
switch (cmd) {
case CXL_IOCTL_START_WORK:
@@ -251,7 +261,7 @@ long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return -EINVAL;
}
-long afu_compat_ioctl(struct file *file, unsigned int cmd,
+static long afu_compat_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
return afu_ioctl(file, cmd, arg);
@@ -265,6 +275,9 @@ int afu_mmap(struct file *file, struct vm_area_struct *vm)
if (ctx->status != STARTED)
return -EIO;
+ if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ return -EIO;
+
return cxl_context_iomap(ctx, vm);
}
@@ -309,6 +322,9 @@ ssize_t afu_read(struct file *file, char __user *buf, size_t count,
int rc;
DEFINE_WAIT(wait);
+ if (!cxl_adapter_link_ok(ctx->afu->adapter))
+ return -EIO;
+
if (count < CXL_READ_MIN_SIZE)
return -EINVAL;
@@ -319,6 +335,11 @@ ssize_t afu_read(struct file *file, char __user *buf, size_t count,
if (ctx_event_pending(ctx))
break;
+ if (!cxl_adapter_link_ok(ctx->afu->adapter)) {
+ rc = -EIO;
+ goto out;
+ }
+
if (file->f_flags & O_NONBLOCK) {
rc = -EAGAIN;
goto out;
@@ -396,7 +417,7 @@ const struct file_operations afu_fops = {
.mmap = afu_mmap,
};
-const struct file_operations afu_master_fops = {
+static const struct file_operations afu_master_fops = {
.owner = THIS_MODULE,
.open = afu_master_open,
.poll = afu_poll,
@@ -519,7 +540,7 @@ int __init cxl_file_init(void)
* If these change we really need to update API. Either change some
* flags or update API version number CXL_API_VERSION.
*/
- BUILD_BUG_ON(CXL_API_VERSION != 1);
+ BUILD_BUG_ON(CXL_API_VERSION != 2);
BUILD_BUG_ON(sizeof(struct cxl_ioctl_start_work) != 64);
BUILD_BUG_ON(sizeof(struct cxl_event_header) != 8);
BUILD_BUG_ON(sizeof(struct cxl_event_afu_interrupt) != 8);