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drm/i915: Wrap context LRI init in a macro
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We set up a load of LRIs in the logical ring context. Wrap that stuff
in a macro to avoid typos with position of each reg/value pair in the
context. This also makes it easier to make the register defines type
safe.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446672017-24497-24-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
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Ville Syrjälä committed Nov 18, 2015
1 parent 35dc3f9 commit 0d925ea
Showing 1 changed file with 40 additions and 51 deletions.
91 changes: 40 additions & 51 deletions drivers/gpu/drm/i915/intel_lrc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -190,7 +190,12 @@
#define GEN8_CTX_L3LLC_COHERENT (1<<5)
#define GEN8_CTX_PRIVILEGE (1<<8)

#define ASSIGN_CTX_PDP(ppgtt, reg_state, n) do { \
#define ASSIGN_CTX_REG(reg_state, pos, reg, val) do { \
(reg_state)[(pos)+0] = (reg); \
(reg_state)[(pos)+1] = (val); \
} while (0)

#define ASSIGN_CTX_PDP(ppgtt, reg_state, n) do { \
const u64 _addr = i915_page_dir_dma_addr((ppgtt), (n)); \
reg_state[CTX_PDP ## n ## _UDW+1] = upper_32_bits(_addr); \
reg_state[CTX_PDP ## n ## _LDW+1] = lower_32_bits(_addr); \
Expand Down Expand Up @@ -2240,46 +2245,31 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o
* only for the first context restore: on a subsequent save, the GPU will
* recreate this batchbuffer with new values (including all the missing
* MI_LOAD_REGISTER_IMM commands that we are not initializing here). */
if (ring->id == RCS)
reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(14);
else
reg_state[CTX_LRI_HEADER_0] = MI_LOAD_REGISTER_IMM(11);
reg_state[CTX_LRI_HEADER_0] |= MI_LRI_FORCE_POSTED;
reg_state[CTX_CONTEXT_CONTROL] = RING_CONTEXT_CONTROL(ring);
reg_state[CTX_CONTEXT_CONTROL+1] =
_MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
CTX_CTRL_RS_CTX_ENABLE);
reg_state[CTX_RING_HEAD] = RING_HEAD(ring->mmio_base);
reg_state[CTX_RING_HEAD+1] = 0;
reg_state[CTX_RING_TAIL] = RING_TAIL(ring->mmio_base);
reg_state[CTX_RING_TAIL+1] = 0;
reg_state[CTX_RING_BUFFER_START] = RING_START(ring->mmio_base);
reg_state[CTX_LRI_HEADER_0] =
MI_LOAD_REGISTER_IMM(ring->id == RCS ? 14 : 11) | MI_LRI_FORCE_POSTED;
ASSIGN_CTX_REG(reg_state, CTX_CONTEXT_CONTROL, RING_CONTEXT_CONTROL(ring),
_MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
CTX_CTRL_RS_CTX_ENABLE));
ASSIGN_CTX_REG(reg_state, CTX_RING_HEAD, RING_HEAD(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_RING_TAIL, RING_TAIL(ring->mmio_base), 0);
/* Ring buffer start address is not known until the buffer is pinned.
* It is written to the context image in execlists_update_context()
*/
reg_state[CTX_RING_BUFFER_CONTROL] = RING_CTL(ring->mmio_base);
reg_state[CTX_RING_BUFFER_CONTROL+1] =
((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) | RING_VALID;
reg_state[CTX_BB_HEAD_U] = RING_BBADDR_UDW(ring->mmio_base);
reg_state[CTX_BB_HEAD_U+1] = 0;
reg_state[CTX_BB_HEAD_L] = RING_BBADDR(ring->mmio_base);
reg_state[CTX_BB_HEAD_L+1] = 0;
reg_state[CTX_BB_STATE] = RING_BBSTATE(ring->mmio_base);
reg_state[CTX_BB_STATE+1] = RING_BB_PPGTT;
reg_state[CTX_SECOND_BB_HEAD_U] = RING_SBBADDR_UDW(ring->mmio_base);
reg_state[CTX_SECOND_BB_HEAD_U+1] = 0;
reg_state[CTX_SECOND_BB_HEAD_L] = RING_SBBADDR(ring->mmio_base);
reg_state[CTX_SECOND_BB_HEAD_L+1] = 0;
reg_state[CTX_SECOND_BB_STATE] = RING_SBBSTATE(ring->mmio_base);
reg_state[CTX_SECOND_BB_STATE+1] = 0;
ASSIGN_CTX_REG(reg_state, CTX_RING_BUFFER_START, RING_START(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_RING_BUFFER_CONTROL, RING_CTL(ring->mmio_base),
((ringbuf->size - PAGE_SIZE) & RING_NR_PAGES) | RING_VALID);
ASSIGN_CTX_REG(reg_state, CTX_BB_HEAD_U, RING_BBADDR_UDW(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_BB_HEAD_L, RING_BBADDR(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_BB_STATE, RING_BBSTATE(ring->mmio_base),
RING_BB_PPGTT);
ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_HEAD_U, RING_SBBADDR_UDW(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_HEAD_L, RING_SBBADDR(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_SECOND_BB_STATE, RING_SBBSTATE(ring->mmio_base), 0);
if (ring->id == RCS) {
reg_state[CTX_BB_PER_CTX_PTR] = RING_BB_PER_CTX_PTR(ring->mmio_base);
reg_state[CTX_BB_PER_CTX_PTR+1] = 0;
reg_state[CTX_RCS_INDIRECT_CTX] = RING_INDIRECT_CTX(ring->mmio_base);
reg_state[CTX_RCS_INDIRECT_CTX+1] = 0;
reg_state[CTX_RCS_INDIRECT_CTX_OFFSET] = RING_INDIRECT_CTX_OFFSET(ring->mmio_base);
reg_state[CTX_RCS_INDIRECT_CTX_OFFSET+1] = 0;
ASSIGN_CTX_REG(reg_state, CTX_BB_PER_CTX_PTR, RING_BB_PER_CTX_PTR(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_RCS_INDIRECT_CTX, RING_INDIRECT_CTX(ring->mmio_base), 0);
ASSIGN_CTX_REG(reg_state, CTX_RCS_INDIRECT_CTX_OFFSET, RING_INDIRECT_CTX_OFFSET(ring->mmio_base), 0);
if (ring->wa_ctx.obj) {
struct i915_ctx_workarounds *wa_ctx = &ring->wa_ctx;
uint32_t ggtt_offset = i915_gem_obj_ggtt_offset(wa_ctx->obj);
Expand All @@ -2296,18 +2286,17 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o
0x01;
}
}
reg_state[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9);
reg_state[CTX_LRI_HEADER_1] |= MI_LRI_FORCE_POSTED;
reg_state[CTX_CTX_TIMESTAMP] = RING_CTX_TIMESTAMP(ring->mmio_base);
reg_state[CTX_CTX_TIMESTAMP+1] = 0;
reg_state[CTX_PDP3_UDW] = GEN8_RING_PDP_UDW(ring, 3);
reg_state[CTX_PDP3_LDW] = GEN8_RING_PDP_LDW(ring, 3);
reg_state[CTX_PDP2_UDW] = GEN8_RING_PDP_UDW(ring, 2);
reg_state[CTX_PDP2_LDW] = GEN8_RING_PDP_LDW(ring, 2);
reg_state[CTX_PDP1_UDW] = GEN8_RING_PDP_UDW(ring, 1);
reg_state[CTX_PDP1_LDW] = GEN8_RING_PDP_LDW(ring, 1);
reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0);
reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0);
reg_state[CTX_LRI_HEADER_1] = MI_LOAD_REGISTER_IMM(9) | MI_LRI_FORCE_POSTED;
ASSIGN_CTX_REG(reg_state, CTX_CTX_TIMESTAMP, RING_CTX_TIMESTAMP(ring->mmio_base), 0);
/* PDP values well be assigned later if needed */
ASSIGN_CTX_REG(reg_state, CTX_PDP3_UDW, GEN8_RING_PDP_UDW(ring, 3), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP3_LDW, GEN8_RING_PDP_LDW(ring, 3), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP2_UDW, GEN8_RING_PDP_UDW(ring, 2), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP2_LDW, GEN8_RING_PDP_LDW(ring, 2), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP1_UDW, GEN8_RING_PDP_UDW(ring, 1), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP1_LDW, GEN8_RING_PDP_LDW(ring, 1), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP0_UDW, GEN8_RING_PDP_UDW(ring, 0), 0);
ASSIGN_CTX_REG(reg_state, CTX_PDP0_LDW, GEN8_RING_PDP_LDW(ring, 0), 0);

if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) {
/* 64b PPGTT (48bit canonical)
Expand All @@ -2329,8 +2318,8 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o

if (ring->id == RCS) {
reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1);
reg_state[CTX_R_PWR_CLK_STATE] = GEN8_R_PWR_CLK_STATE;
reg_state[CTX_R_PWR_CLK_STATE+1] = make_rpcs(dev);
ASSIGN_CTX_REG(reg_state, CTX_R_PWR_CLK_STATE, GEN8_R_PWR_CLK_STATE,
make_rpcs(dev));
}

kunmap_atomic(reg_state);
Expand Down

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