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Diffstat (limited to 'drivers/gpu/drm/radeon/cik.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/cik.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index a61c373c2bc..a8161d0e5da 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -121,6 +121,44 @@ u32 cik_get_xclk(struct radeon_device *rdev) return reference_clock; } +/** + * cik_mm_rdoorbell - read a doorbell dword + * + * @rdev: radeon_device pointer + * @offset: byte offset into the aperture + * + * Returns the value in the doorbell aperture at the + * requested offset (CIK). + */ +u32 cik_mm_rdoorbell(struct radeon_device *rdev, u32 offset) +{ + if (offset < rdev->doorbell.size) { + return readl(((void __iomem *)rdev->doorbell.ptr) + offset); + } else { + DRM_ERROR("reading beyond doorbell aperture: 0x%08x!\n", offset); + return 0; + } +} + +/** + * cik_mm_wdoorbell - write a doorbell dword + * + * @rdev: radeon_device pointer + * @offset: byte offset into the aperture + * @v: value to write + * + * Writes @v to the doorbell aperture at the + * requested offset (CIK). + */ +void cik_mm_wdoorbell(struct radeon_device *rdev, u32 offset, u32 v) +{ + if (offset < rdev->doorbell.size) { + writel(v, ((void __iomem *)rdev->doorbell.ptr) + offset); + } else { + DRM_ERROR("writing beyond doorbell aperture: 0x%08x!\n", offset); + } +} + #define BONAIRE_IO_MC_REGS_SIZE 36 static const u32 bonaire_io_mc_regs[BONAIRE_IO_MC_REGS_SIZE][2] = |