vfio: platform: introduce vfio-platform-base module

[cascardo/linux.git] / drivers / vfio / platform / vfio_platform_common.c

diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c
index e43efb5..7f69b85 100644 (file)
--- a/drivers/vfio/platform/vfio_platform_common.c
+++ b/drivers/vfio/platform/vfio_platform_common.c
@@ -23,6 +23,10 @@
 
 #include "vfio_platform_private.h"
 
+#define DRIVER_VERSION  "0.10"
+#define DRIVER_AUTHOR   "Antonios Motakis <a.motakis@virtualopensystems.com>"
+#define DRIVER_DESC     "VFIO platform base module"
+
 static DEFINE_MUTEX(driver_lock);
 
 static const struct vfio_platform_reset_combo reset_lookup_table[] = {
@@ -146,7 +150,7 @@ static void vfio_platform_release(void *device_data)
 
        mutex_unlock(&driver_lock);
 
-       module_put(THIS_MODULE);
+       module_put(vdev->parent_module);
 }
 
 static int vfio_platform_open(void *device_data)
@@ -154,7 +158,7 @@ static int vfio_platform_open(void *device_data)
        struct vfio_platform_device *vdev = device_data;
        int ret;
 
-       if (!try_module_get(THIS_MODULE))
+       if (!try_module_get(vdev->parent_module))
                return -ENODEV;
 
        mutex_lock(&driver_lock);
@@ -307,17 +311,17 @@ static long vfio_platform_ioctl(void *device_data,
        return -ENOTTY;
 }
 
-static ssize_t vfio_platform_read_mmio(struct vfio_platform_region reg,
+static ssize_t vfio_platform_read_mmio(struct vfio_platform_region *reg,
                                       char __user *buf, size_t count,
                                       loff_t off)
 {
        unsigned int done = 0;
 
-       if (!reg.ioaddr) {
-               reg.ioaddr =
-                       ioremap_nocache(reg.addr, reg.size);
+       if (!reg->ioaddr) {
+               reg->ioaddr =
+                       ioremap_nocache(reg->addr, reg->size);
 
-               if (!reg.ioaddr)
+               if (!reg->ioaddr)
                        return -ENOMEM;
        }
 
@@ -327,7 +331,7 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region reg,
                if (count >= 4 && !(off % 4)) {
                        u32 val;
 
-                       val = ioread32(reg.ioaddr + off);
+                       val = ioread32(reg->ioaddr + off);
                        if (copy_to_user(buf, &val, 4))
                                goto err;
 
@@ -335,7 +339,7 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region reg,
                } else if (count >= 2 && !(off % 2)) {
                        u16 val;
 
-                       val = ioread16(reg.ioaddr + off);
+                       val = ioread16(reg->ioaddr + off);
                        if (copy_to_user(buf, &val, 2))
                                goto err;
 
@@ -343,7 +347,7 @@ static ssize_t vfio_platform_read_mmio(struct vfio_platform_region reg,
                } else {
                        u8 val;
 
-                       val = ioread8(reg.ioaddr + off);
+                       val = ioread8(reg->ioaddr + off);
                        if (copy_to_user(buf, &val, 1))
                                goto err;
 
@@ -376,7 +380,7 @@ static ssize_t vfio_platform_read(void *device_data, char __user *buf,
                return -EINVAL;
 
        if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)
-               return vfio_platform_read_mmio(vdev->regions[index],
+               return vfio_platform_read_mmio(&vdev->regions[index],
                                                        buf, count, off);
        else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)
                return -EINVAL; /* not implemented */
@@ -384,17 +388,17 @@ static ssize_t vfio_platform_read(void *device_data, char __user *buf,
        return -EINVAL;
 }
 
-static ssize_t vfio_platform_write_mmio(struct vfio_platform_region reg,
+static ssize_t vfio_platform_write_mmio(struct vfio_platform_region *reg,
                                        const char __user *buf, size_t count,
                                        loff_t off)
 {
        unsigned int done = 0;
 
-       if (!reg.ioaddr) {
-               reg.ioaddr =
-                       ioremap_nocache(reg.addr, reg.size);
+       if (!reg->ioaddr) {
+               reg->ioaddr =
+                       ioremap_nocache(reg->addr, reg->size);
 
-               if (!reg.ioaddr)
+               if (!reg->ioaddr)
                        return -ENOMEM;
        }
 
@@ -406,7 +410,7 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region reg,
 
                        if (copy_from_user(&val, buf, 4))
                                goto err;
-                       iowrite32(val, reg.ioaddr + off);
+                       iowrite32(val, reg->ioaddr + off);
 
                        filled = 4;
                } else if (count >= 2 && !(off % 2)) {
@@ -414,7 +418,7 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region reg,
 
                        if (copy_from_user(&val, buf, 2))
                                goto err;
-                       iowrite16(val, reg.ioaddr + off);
+                       iowrite16(val, reg->ioaddr + off);
 
                        filled = 2;
                } else {
@@ -422,7 +426,7 @@ static ssize_t vfio_platform_write_mmio(struct vfio_platform_region reg,
 
                        if (copy_from_user(&val, buf, 1))
                                goto err;
-                       iowrite8(val, reg.ioaddr + off);
+                       iowrite8(val, reg->ioaddr + off);
 
                        filled = 1;
                }
@@ -452,7 +456,7 @@ static ssize_t vfio_platform_write(void *device_data, const char __user *buf,
                return -EINVAL;
 
        if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_MMIO)
-               return vfio_platform_write_mmio(vdev->regions[index],
+               return vfio_platform_write_mmio(&vdev->regions[index],
                                                        buf, count, off);
        else if (vdev->regions[index].type & VFIO_PLATFORM_REGION_TYPE_PIO)
                return -EINVAL; /* not implemented */
@@ -573,3 +577,8 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev)
        return vdev;
 }
 EXPORT_SYMBOL_GPL(vfio_platform_remove_common);
+
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);