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drm/i915: add relative ring register macros 

Documentation explicitly mentions that the ring registers are
designed to have the same offsets relative to a base registers.

Use this to fight the code beaurocratic in intel_ringbuffer.c.

No code changes in this patch, just the new definitions.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Daniel Vetter 2010-08-02 16:24:01 +02:00 committed by Chris Wilson
parent b8aea0c800
commit 333e9fe94d
3 changed files with 12 additions and 0 deletions
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8
drivers/gpu/drm/i915/i915_reg.h
View File

@ -288,6 +288,14 @@
#define PRB0_HEAD 0x02034
#define PRB0_START 0x02038
#define PRB0_CTL 0x0203c
#define RENDER_RING_BASE 0x02000
#define BSD_RING_BASE 0x04000
#define GEN6_BSD_RING_BASE 0x12000
#define RING_TAIL(base) (base)+0x30
#define RING_HEAD(base) (base)+0x34
#define RING_START(base) (base)+0x38
#define RING_CTL(base) (base)+0x3c
#define RING_HWS_PGA(base) (base)+0x80
#define TAIL_ADDR 0x001FFFF8
#define HEAD_WRAP_COUNT 0xFFE00000
#define HEAD_WRAP_ONE 0x00200000

3
drivers/gpu/drm/i915/intel_ringbuffer.c
View File

@ -801,6 +801,7 @@ static const struct intel_ring_buffer render_ring = {
.tail = PRB0_TAIL,
.start = PRB0_START
},
.mmio_base = RENDER_RING_BASE,
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,
@ -839,6 +840,7 @@ static const struct intel_ring_buffer bsd_ring = {
.tail = BSD_RING_TAIL,
.start = BSD_RING_START
},
.mmio_base = BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,
@ -957,6 +959,7 @@ static const struct intel_ring_buffer gen6_bsd_ring = {
.tail = GEN6_BSD_RING_TAIL,
.start = GEN6_BSD_RING_START
},
.mmio_base = GEN6_BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.alignment = PAGE_SIZE,
.virtual_start = NULL,

1
drivers/gpu/drm/i915/intel_ringbuffer.h
View File

@ -20,6 +20,7 @@ struct intel_ring_buffer {
u32 tail;
u32 start;
} regs;
u32 mmio_base;
unsigned long size;
unsigned int alignment;
void *virtual_start;