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drm/nouveau/pbus/hwsq: Support strided register writes 

Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Roy Spliet 2015-03-12 20:43:22 +01:00 committed by Ben Skeggs
parent df16896b86
commit 3834b632b2
1 changed files with 37 additions and 7 deletions
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44
drivers/gpu/drm/nouveau/nvkm/subdev/bus/hwsq.h
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@ -11,17 +11,34 @@ struct hwsq {
struct hwsq_reg {
int sequence;
bool force;
u32 addr[2];
u32 addr;
u32 stride; /* in bytes */
u32 mask;
u32 data;
};
static inline struct hwsq_reg
hwsq_stride(u32 addr, u32 stride, u32 mask)
{
return (struct hwsq_reg) {
.sequence = 0,
.force = 0,
.addr = addr,
.stride = stride,
.mask = mask,
.data = 0xdeadbeef,
};
}
static inline struct hwsq_reg
hwsq_reg2(u32 addr1, u32 addr2)
{
return (struct hwsq_reg) {
.sequence = 0,
.force = 0,
.addr = { addr1, addr2 },
.addr = addr1,
.stride = addr2 - addr1,
.mask = 0x3,
.data = 0xdeadbeef,
};
}
@ -29,7 +46,14 @@ hwsq_reg2(u32 addr1, u32 addr2)
static inline struct hwsq_reg
hwsq_reg(u32 addr)
{
return hwsq_reg2(addr, addr);
return (struct hwsq_reg) {
.sequence = 0,
.force = 0,
.addr = addr,
.stride = 0,
.mask = 0x1,
.data = 0xdeadbeef,
};
}
static inline int
@ -62,18 +86,24 @@ static inline u32
hwsq_rd32(struct hwsq *ram, struct hwsq_reg *reg)
{
if (reg->sequence != ram->sequence)
reg->data = nv_rd32(ram->subdev, reg->addr[0]);
reg->data = nv_rd32(ram->subdev, reg->addr);
return reg->data;
}
static inline void
hwsq_wr32(struct hwsq *ram, struct hwsq_reg *reg, u32 data)
{
u32 mask, off = 0;
reg->sequence = ram->sequence;
reg->data = data;
if (reg->addr[0] != reg->addr[1])
nvkm_hwsq_wr32(ram->hwsq, reg->addr[1], reg->data);
nvkm_hwsq_wr32(ram->hwsq, reg->addr[0], reg->data);
for (mask = reg->mask; mask > 0; mask = (mask & ~1) >> 1) {
if (mask & 1)
nvkm_hwsq_wr32(ram->hwsq, reg->addr+off, reg->data);
off += reg->stride;
}
}
static inline void