lkml.org 
[lkml]   [2020]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Subject[PATCH v3 12/18] dmaengine: idxd: add mdev type as a new wq type
From
Date
Add "mdev" wq type and support helpers. The mdev wq type marks the wq
to be utilized as a VFIO mediated device.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/idxd/idxd.h | 2 ++
drivers/dma/idxd/sysfs.c | 13 +++++++++++--
2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/idxd/idxd.h b/drivers/dma/idxd/idxd.h
index 23d3ebca1da5..23287f8fd19a 100644
--- a/drivers/dma/idxd/idxd.h
+++ b/drivers/dma/idxd/idxd.h
@@ -65,6 +65,7 @@ enum idxd_wq_type {
IDXD_WQT_NONE = 0,
IDXD_WQT_KERNEL,
IDXD_WQT_USER,
+ IDXD_WQT_MDEV,
};

struct idxd_cdev {
@@ -290,6 +291,7 @@ void idxd_cleanup_sysfs(struct idxd_device *idxd);
int idxd_register_driver(void);
void idxd_unregister_driver(void);
struct bus_type *idxd_get_bus_type(struct idxd_device *idxd);
+bool is_idxd_wq_mdev(struct idxd_wq *wq);

/* device interrupt control */
irqreturn_t idxd_irq_handler(int vec, void *data);
diff --git a/drivers/dma/idxd/sysfs.c b/drivers/dma/idxd/sysfs.c
index cbb1038f1ed0..6eb67f744c8e 100644
--- a/drivers/dma/idxd/sysfs.c
+++ b/drivers/dma/idxd/sysfs.c
@@ -14,6 +14,7 @@ static char *idxd_wq_type_names[] = {
[IDXD_WQT_NONE] = "none",
[IDXD_WQT_KERNEL] = "kernel",
[IDXD_WQT_USER] = "user",
+ [IDXD_WQT_MDEV] = "mdev",
};

static void idxd_conf_device_release(struct device *dev)
@@ -69,6 +70,11 @@ static inline bool is_idxd_wq_cdev(struct idxd_wq *wq)
return wq->type == IDXD_WQT_USER;
}

+inline bool is_idxd_wq_mdev(struct idxd_wq *wq)
+{
+ return wq->type == IDXD_WQT_MDEV ? true : false;
+}
+
static int idxd_config_bus_match(struct device *dev,
struct device_driver *drv)
{
@@ -987,8 +993,9 @@ static ssize_t wq_type_show(struct device *dev,
return sprintf(buf, "%s\n",
idxd_wq_type_names[IDXD_WQT_KERNEL]);
case IDXD_WQT_USER:
- return sprintf(buf, "%s\n",
- idxd_wq_type_names[IDXD_WQT_USER]);
+ return sprintf(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_USER]);
+ case IDXD_WQT_MDEV:
+ return sprintf(buf, "%s\n", idxd_wq_type_names[IDXD_WQT_MDEV]);
case IDXD_WQT_NONE:
default:
return sprintf(buf, "%s\n",
@@ -1015,6 +1022,8 @@ static ssize_t wq_type_store(struct device *dev,
wq->type = IDXD_WQT_KERNEL;
else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_USER]))
wq->type = IDXD_WQT_USER;
+ else if (sysfs_streq(buf, idxd_wq_type_names[IDXD_WQT_MDEV]))
+ wq->type = IDXD_WQT_MDEV;
else
return -EINVAL;

\
 
 \ /
  Last update: 2020-09-16 01:30    [W:0.022 / U:1.596 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site