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| author | Lucas De Marchi <lucas.demarchi@intel.com> | 2019-10-24 22:51:22 +0300 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2019-10-25 23:55:49 +0300 |
| commit | 7be8782a502fdb60e1f99c82a8d6b3015a2a6bc4 (patch) | |
| tree | 25d93916e143d6079f7d4d64914389c9f6816544 | |
| parent | e6e2ac07118b15f25683fcbd59ea1be73ec9465d (diff) | |
| download | linux-7be8782a502fdb60e1f99c82a8d6b3015a2a6bc4.tar.xz | |
drm/i915: split gen11_irq_handler to make it shareable
Split gen11_irq_handler() to receive as parameter the function
pointers. This allows to share the interrupt handler even if the enable/disable
functions are different.
Make sure it's always inlined to avoid the extra indirect call on the
hot path. Checking with gcc 9 this produce the exact same code as of
now:
$ size drivers/gpu/drm/i915/i915_irq*.o
text data bss dec hex filename
47511 560 0 48071 bbc7 drivers/gpu/drm/i915/i915_irq.o
47511 560 0 48071 bbc7 drivers/gpu/drm/i915/i915_irq_new.o
$ gdb -batch -ex 'file drivers/gpu/drm/i915/i915_irq.o' -ex 'disassemble gen11_irq_handler' > /tmp/old.s
$ gdb -batch -ex 'file drivers/gpu/drm/i915/i915_irq_new.o' -ex 'disassemble gen11_irq_handler' > /tmp/new.s
$ git diff --no-index /tmp/{old,new}.s
$
So, no change in behavior, just a simple refactor.
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191024195122.22877-4-lucas.demarchi@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/i915_irq.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index a048c79a6a55..33020c8ca5f6 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -2861,9 +2861,11 @@ static inline void gen11_master_intr_enable(void __iomem * const regs) raw_reg_write(regs, GEN11_GFX_MSTR_IRQ, GEN11_MASTER_IRQ); } -static irqreturn_t gen11_irq_handler(int irq, void *arg) +static __always_inline irqreturn_t +__gen11_irq_handler(struct drm_i915_private * const i915, + u32 (*intr_disable)(void __iomem * const regs), + void (*intr_enable)(void __iomem * const regs)) { - struct drm_i915_private * const i915 = arg; void __iomem * const regs = i915->uncore.regs; struct intel_gt *gt = &i915->gt; u32 master_ctl; @@ -2872,9 +2874,9 @@ static irqreturn_t gen11_irq_handler(int irq, void *arg) if (!intel_irqs_enabled(i915)) return IRQ_NONE; - master_ctl = gen11_master_intr_disable(regs); + master_ctl = intr_disable(regs); if (!master_ctl) { - gen11_master_intr_enable(regs); + intr_enable(regs); return IRQ_NONE; } @@ -2896,13 +2898,20 @@ static irqreturn_t gen11_irq_handler(int irq, void *arg) gu_misc_iir = gen11_gu_misc_irq_ack(gt, master_ctl); - gen11_master_intr_enable(regs); + intr_enable(regs); gen11_gu_misc_irq_handler(gt, gu_misc_iir); return IRQ_HANDLED; } +static irqreturn_t gen11_irq_handler(int irq, void *arg) +{ + return __gen11_irq_handler(arg, + gen11_master_intr_disable, + gen11_master_intr_enable); +} + /* Called from drm generic code, passed 'crtc' which * we use as a pipe index */ |