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drm/vmwgfx: Replace iowrite/ioread with volatile memory accesses

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Now that we use memremap instead of ioremap, Use WRITE_ONCE / READ_ONCE
instead of iowrite / ioread.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom
2015-10-28 10:44:04 +01:00
parent 53c1e53571
commit b76ff5ea1c
7 changed files with 118 additions and 105 deletions
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28
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
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@@ -375,7 +375,7 @@ struct vmw_private {
uint32_t stdu_max_height;
uint32_t initial_width;
uint32_t initial_height;
u32 __iomem *mmio_virt;
u32 *mmio_virt;
uint32_t capabilities;
uint32_t max_gmr_ids;
uint32_t max_gmr_pages;
@@ -1206,4 +1206,30 @@ static inline void vmw_fifo_resource_dec(struct vmw_private *dev_priv)
{
atomic_dec(&dev_priv->num_fifo_resources);
}
/**
* vmw_mmio_read - Perform a MMIO read from volatile memory
*
* @addr: The address to read from
*
* This function is intended to be equivalent to ioread32() on
* memremap'd memory, but without byteswapping.
*/
static inline u32 vmw_mmio_read(u32 *addr)
{
return READ_ONCE(*addr);
}
/**
* vmw_mmio_write - Perform a MMIO write to volatile memory
*
* @addr: The address to write to
*
* This function is intended to be equivalent to iowrite32 on
* memremap'd memory, but without byteswapping.
*/
static inline void vmw_mmio_write(u32 value, u32 *addr)
{
WRITE_ONCE(*addr, value);
}
#endif