On Thu, Jul 31, 2014 at 04:55:58AM -0700, Mcaulay, Alistair wrote: > Hi Jeff, > > Some more comments in the code. > > Thanks, > Alistair. > > -----Original Message----- > From: Intel-gfx [mailto:intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of jeff.mcgee@xxxxxxxxx > Sent: Thursday, July 31, 2014 3:00 AM > To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx > Subject: [PATCH 2/2] drm/i915/chv: Implement SSEU info for CHV > > From: Jeff McGee <jeff.mcgee@xxxxxxxxx> > > Cherryview can have different SSEU configurations within a given PCI ID, so we collect the info from the fuse register. > > I don't currently have access to a CHV, much less one with an interesting fuse config. So I have compile-checked this only! > > Signed-off-by: Jeff McGee <jeff.mcgee@xxxxxxxxx> > --- > drivers/gpu/drm/i915/Makefile | 3 +- > drivers/gpu/drm/i915/i915_dma.c | 2 ++ > drivers/gpu/drm/i915/i915_reg.h | 13 ++++++++ > drivers/gpu/drm/i915/intel_sseu.c | 64 +++++++++++++++++++++++++++++++++++++++ > drivers/gpu/drm/i915/intel_sseu.h | 2 ++ > 5 files changed, 83 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/i915/intel_sseu.c > > diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 91bd167..9a0f411 100644 > --- a/drivers/gpu/drm/i915/Makefile > +++ b/drivers/gpu/drm/i915/Makefile > @@ -32,7 +32,8 @@ i915-y += i915_cmd_parser.o \ > i915_irq.o \ > i915_trace_points.o \ > intel_ringbuffer.o \ > - intel_uncore.o > + intel_uncore.o \ > + intel_sseu.o > > # autogenerated null render state > i915-y += intel_renderstate_gen6.o \ > diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index f581848..384ef65 100644 > --- a/drivers/gpu/drm/i915/i915_dma.c > +++ b/drivers/gpu/drm/i915/i915_dma.c > @@ -1772,6 +1772,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) > goto out_gem_unload; > } > > + intel_sseu_init(dev); > + > intel_power_domains_init(dev_priv); > > if (drm_core_check_feature(dev, DRIVER_MODESET)) { diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 28e21ed..24a2d56 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -5624,6 +5624,19 @@ enum punit_power_well { > #define GEN7_MISCCPCTL (0x9424) > #define GEN7_DOP_CLOCK_GATE_ENABLE (1<<0) > > +/* Fuse readout registers for GT */ > +#define CHV_FUSE_GT 0x182168 > +#define CHV_FUSE_GT_SUBSLICE_DISABLE_SS0 10 > +#define CHV_FUSE_GT_SUBSLICE_DISABLE_SS1 11 > > These should be: > #define CHV_FUSE_GT_SUBSLICE_DISABLE_SS0 (1 << 10) > #define CHV_FUSE_GT_SUBSLICE_DISABLE_SS1 (1 << 11) > > +#define CHV_FUSE_GT_EU_DISABLE_SS0_ROW0_MASK (0xf<<16) > +#define CHV_FUSE_GT_EU_DISABLE_SS0_ROW0_SHIFT 16 > > Why not use the shift define here? > #define CHV_FUSE_GT_EU_DISABLE_SS0_ROW0_MASK (0xf<<CHV_FUSE_GT_EU_DISABLE_SS0_ROW0_SHIFT) > and for the others. > See answer in previous patch -Jeff > +#define CHV_FUSE_GT_EU_DISABLE_SS0_ROW1_MASK (0xf<<20) > +#define CHV_FUSE_GT_EU_DISABLE_SS0_ROW1_SHIFT 20 > +#define CHV_FUSE_GT_EU_DISABLE_SS1_ROW0_MASK (0xf<<24) > +#define CHV_FUSE_GT_EU_DISABLE_SS1_ROW0_SHIFT 24 > +#define CHV_FUSE_GT_EU_DISABLE_SS1_ROW1_MASK (0xf<<28) > +#define CHV_FUSE_GT_EU_DISABLE_SS1_ROW1_SHIFT 28 > + > /* IVYBRIDGE DPF */ > #define GEN7_L3CDERRST1 0xB008 /* L3CD Error Status 1 */ > #define HSW_L3CDERRST11 0xB208 /* L3CD Error Status register 1 slice 1 */ > diff --git a/drivers/gpu/drm/i915/intel_sseu.c b/drivers/gpu/drm/i915/intel_sseu.c > new file mode 100644 > index 0000000..6ba4830 > --- /dev/null > +++ b/drivers/gpu/drm/i915/intel_sseu.c > @@ -0,0 +1,64 @@ > +/* > + * Copyright © 2014 Intel Corporation > + * > + * Permission is hereby granted, free of charge, to any person > +obtaining a > + * copy of this software and associated documentation files (the > +"Software"), > + * to deal in the Software without restriction, including without > +limitation > + * the rights to use, copy, modify, merge, publish, distribute, > +sublicense, > + * and/or sell copies of the Software, and to permit persons to whom > +the > + * Software is furnished to do so, subject to the following conditions: > + * > + * The above copyright notice and this permission notice (including the > +next > + * paragraph) shall be included in all copies or substantial portions > +of the > + * Software. > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, > +EXPRESS OR > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF > +MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT > +SHALL > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR > +OTHER > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, > +ARISING > + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER > +DEALINGS > + * IN THE SOFTWARE. > + * > + */ > +#include <linux/bitops.h> > +#include "i915_drv.h" > +#include "intel_sseu.h" > + > +void intel_sseu_init(struct drm_device *dev) { > + struct drm_i915_private *dev_priv = dev->dev_private; > + struct intel_sseu_info sseu_info; > + u32 gp = 0; > + > + /* Collect SSEU info per device */ > + if (IS_CHERRYVIEW(dev)) { > + u32 fuse, mask_ss, mask_eu; > + > + fuse = I915_READ(CHV_FUSE_GT); > + mask_ss = fuse & (CHV_FUSE_GT_SUBSLICE_DISABLE_SS0 | > + CHV_FUSE_GT_SUBSLICE_DISABLE_SS1); > + mask_eu = fuse & (CHV_FUSE_GT_EU_DISABLE_SS0_ROW0_MASK | > + CHV_FUSE_GT_EU_DISABLE_SS0_ROW1_MASK | > + CHV_FUSE_GT_EU_DISABLE_SS1_ROW0_MASK | > + CHV_FUSE_GT_EU_DISABLE_SS1_ROW1_MASK); > + sseu_info.slice_cnt = 1; > + sseu_info.subslice_cnt = 2 - hweight32(mask_ss); > + sseu_info.eu_cnt = 16 - hweight32(mask_eu); > + sseu_info.threads_per_eu = 7; > + } > + > + /* Pack SSEU info bitfield for I915_PARAM_SSEU_INFO */ > + gp |= (sseu_info.slice_cnt << I915_SSEU_INFO_SLICE_CNT_SHIFT) & > + I915_SSEU_INFO_SLICE_CNT_MASK; > > In theory, there should be no need to use the mask, unless something has gone wrong. > Maybe: > > WARN_ON((sseu_info.slice_cnt << I915_SSEU_INFO_SLICE_CNT_SHIFT) > I915_SSEU_INFO_SLICE_CNT_MASK ); > etc > > I agree. Will make similar change in next version. -Jeff > + gp |= (sseu_info.subslice_cnt << I915_SSEU_INFO_SUBSLICE_CNT_SHIFT) & > + I915_SSEU_INFO_SUBSLICE_CNT_MASK; > + gp |= (sseu_info.eu_cnt << I915_SSEU_INFO_EU_CNT_SHIFT) & > + I915_SSEU_INFO_EU_CNT_MASK; > + gp |= (sseu_info.threads_per_eu << I915_SSEU_INFO_THREADS_PER_EU_SHIFT) & > + I915_SSEU_INFO_THREADS_PER_EU_MASK; > + sseu_info.gp_sseu_info = gp; > + > + /* Copy SSEU info to the const device info with pointer magic */ > + *(struct intel_sseu_info *)&dev_priv->info.sseu = sseu_info; } > diff --git a/drivers/gpu/drm/i915/intel_sseu.h b/drivers/gpu/drm/i915/intel_sseu.h > index 7db7175..0257358 100644 > --- a/drivers/gpu/drm/i915/intel_sseu.h > +++ b/drivers/gpu/drm/i915/intel_sseu.h > @@ -37,4 +37,6 @@ struct intel_sseu_info { > u32 gp_sseu_info; > }; > > +extern void intel_sseu_init(struct drm_device *dev); > + > #endif > -- > 2.0.1 > > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
