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drm/i915: Reject commands that explicitly generate interrupts

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The driver leaves most interrupts masked during normal operation,
so there would have to be additional work to enable userspace to
safely request/receive an interrupt.

v2: trailing commas, rebased

Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Brad Volkin 2014-02-18 10:15:53 -08:00 committed by Daniel Vetter
parent f0a346bdaf
commit b18b396b3a
2 changed files with 21 additions and 2 deletions
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22
drivers/gpu/drm/i915/i915_cmd_parser.c
View File

@ -115,7 +115,7 @@
---------------------------------------------------------- */
static const struct drm_i915_cmd_descriptor common_cmds[] = {
CMD( MI_NOOP, SMI, F, 1, S ),
CMD( MI_USER_INTERRUPT, SMI, F, 1, S ),
CMD( MI_USER_INTERRUPT, SMI, F, 1, R ),
CMD( MI_WAIT_FOR_EVENT, SMI, F, 1, M ),
CMD( MI_ARB_CHECK, SMI, F, 1, S ),
CMD( MI_REPORT_HEAD, SMI, F, 1, S ),
@ -156,7 +156,7 @@ static const struct drm_i915_cmd_descriptor render_cmds[] = {
CMD( GFX_OP_PIPE_CONTROL(5), S3D, !F, 0xFF, B,
.bits = {{
.offset = 1,
.mask = PIPE_CONTROL_MMIO_WRITE,
.mask = (PIPE_CONTROL_MMIO_WRITE | PIPE_CONTROL_NOTIFY),
.expected = 0,
}}, ),
};
@ -186,6 +186,12 @@ static const struct drm_i915_cmd_descriptor video_cmds[] = {
CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, S ),
CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
.bits = {{
.offset = 0,
.mask = MI_FLUSH_DW_NOTIFY,
.expected = 0,
}}, ),
CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, S ),
/*
* MFX_WAIT doesn't fit the way we handle length for most commands.
@ -199,6 +205,12 @@ static const struct drm_i915_cmd_descriptor vecs_cmds[] = {
CMD( MI_ARB_ON_OFF, SMI, F, 1, R ),
CMD( MI_STORE_DWORD_IMM, SMI, !F, 0xFF, S ),
CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
.bits = {{
.offset = 0,
.mask = MI_FLUSH_DW_NOTIFY,
.expected = 0,
}}, ),
CMD( MI_CONDITIONAL_BATCH_BUFFER_END, SMI, !F, 0xFF, S ),
};
@ -206,6 +218,12 @@ static const struct drm_i915_cmd_descriptor blt_cmds[] = {
CMD( MI_DISPLAY_FLIP, SMI, !F, 0xFF, R ),
CMD( MI_STORE_DWORD_IMM, SMI, !F, 0x3FF, S ),
CMD( MI_UPDATE_GTT, SMI, !F, 0x3F, R ),
CMD( MI_FLUSH_DW, SMI, !F, 0x3F, B,
.bits = {{
.offset = 0,
.mask = MI_FLUSH_DW_NOTIFY,
.expected = 0,
}}, ),
CMD( COLOR_BLT, S2D, !F, 0x3F, S ),
CMD( SRC_COPY_BLT, S2D, !F, 0x3F, S ),
};

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -270,6 +270,7 @@
#define MI_FLUSH_DW_STORE_INDEX (1<<21)
#define MI_INVALIDATE_TLB (1<<18)
#define MI_FLUSH_DW_OP_STOREDW (1<<14)
#define MI_FLUSH_DW_NOTIFY (1<<8)
#define MI_INVALIDATE_BSD (1<<7)
#define MI_FLUSH_DW_USE_GTT (1<<2)
#define MI_FLUSH_DW_USE_PPGTT (0<<2)