[Intel-gfx] [PATCH 01/12] drm/i915: Store DIMM rank information as a number
Ville Syrjälä
ville.syrjala at linux.intel.com
Mon Mar 4 16:32:40 UTC 2019
On Mon, Mar 04, 2019 at 06:17:50PM +0200, Jani Nikula wrote:
> On Mon, 25 Feb 2019, Ville Syrjala <ville.syrjala at linux.intel.com> wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> >
> > Life will be easier later if we have the ranks stored
> > as a bare number.
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > ---
> > drivers/gpu/drm/i915/i915_drv.c | 92 +++++++++++++++------------------
> > drivers/gpu/drm/i915/i915_drv.h | 11 ++--
> > 2 files changed, 45 insertions(+), 58 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> > index c6354f6cdbdb..48c6bc44072d 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.c
> > +++ b/drivers/gpu/drm/i915/i915_drv.c
> > @@ -1068,28 +1068,28 @@ static void intel_sanitize_options(struct drm_i915_private *dev_priv)
> > intel_gvt_sanitize_options(dev_priv);
> > }
> >
> > -static enum dram_rank skl_get_dimm_rank(u8 size, u32 rank)
> > +static int skl_get_dimm_ranks(u8 size, u32 rank)
> > {
> > if (size == 0)
> > - return I915_DRAM_RANK_INVALID;
> > + return 0;
> > if (rank == SKL_DRAM_RANK_SINGLE)
> > - return I915_DRAM_RANK_SINGLE;
> > + return 1;
> > else if (rank == SKL_DRAM_RANK_DUAL)
> > - return I915_DRAM_RANK_DUAL;
> > + return 2;
> >
> > - return I915_DRAM_RANK_INVALID;
> > + return 0;
> > }
> >
> > static bool
> > -skl_is_16gb_dimm(enum dram_rank rank, u8 size, u8 width)
> > +skl_is_16gb_dimm(u8 ranks, u8 size, u8 width)
> > {
> > - if (rank == I915_DRAM_RANK_SINGLE && width == 8 && size == 16)
> > + if (ranks == 1 && width == 8 && size == 16)
> > return true;
> > - else if (rank == I915_DRAM_RANK_DUAL && width == 8 && size == 32)
> > + else if (ranks == 2 && width == 8 && size == 32)
> > return true;
> > - else if (rank == SKL_DRAM_RANK_SINGLE && width == 16 && size == 8)
> > + else if (ranks == 1 && width == 16 && size == 8)
> > return true;
> > - else if (rank == SKL_DRAM_RANK_DUAL && width == 16 && size == 16)
> > + else if (ranks == 2 && width == 16 && size == 16)
> > return true;
> >
> > return false;
> > @@ -1120,28 +1120,24 @@ skl_dram_get_channel_info(struct dram_channel_info *ch, u32 val)
> >
> > tmp_l = val & SKL_DRAM_RANK_MASK;
> > tmp_s = s_val & SKL_DRAM_RANK_MASK;
> > - ch->l_info.rank = skl_get_dimm_rank(ch->l_info.size, tmp_l);
> > - ch->s_info.rank = skl_get_dimm_rank(ch->s_info.size, tmp_s);
> > -
> > - if (ch->l_info.rank == I915_DRAM_RANK_DUAL ||
> > - ch->s_info.rank == I915_DRAM_RANK_DUAL)
> > - ch->rank = I915_DRAM_RANK_DUAL;
> > - else if (ch->l_info.rank == I915_DRAM_RANK_SINGLE &&
> > - ch->s_info.rank == I915_DRAM_RANK_SINGLE)
> > - ch->rank = I915_DRAM_RANK_DUAL;
> > + ch->l_info.ranks = skl_get_dimm_ranks(ch->l_info.size, tmp_l);
> > + ch->s_info.ranks = skl_get_dimm_ranks(ch->s_info.size, tmp_s);
> > +
> > + if (ch->l_info.ranks == 2 || ch->s_info.ranks == 2)
> > + ch->ranks = 2;
> > + else if (ch->l_info.ranks == 1 && ch->s_info.ranks == 1)
> > + ch->ranks = 2;
> > else
> > - ch->rank = I915_DRAM_RANK_SINGLE;
> > + ch->ranks = 1;
> >
> > - ch->is_16gb_dimm = skl_is_16gb_dimm(ch->l_info.rank, ch->l_info.size,
> > + ch->is_16gb_dimm = skl_is_16gb_dimm(ch->l_info.ranks, ch->l_info.size,
> > ch->l_info.width) ||
> > - skl_is_16gb_dimm(ch->s_info.rank, ch->s_info.size,
> > + skl_is_16gb_dimm(ch->s_info.ranks, ch->s_info.size,
> > ch->s_info.width);
> >
> > - DRM_DEBUG_KMS("(size:width:rank) L(%dGB:X%d:%s) S(%dGB:X%d:%s)\n",
> > - ch->l_info.size, ch->l_info.width,
> > - ch->l_info.rank ? "dual" : "single",
> > - ch->s_info.size, ch->s_info.width,
> > - ch->s_info.rank ? "dual" : "single");
>
> I don't understand how the above ternary operators could ever have
> produced the right results before.
Good point. I didn't even notice :)
>
> > + DRM_DEBUG_KMS("(size:width:ranks) L(%dGB:X%d:%d) S(%dGB:X%d:%d)\n",
> > + ch->l_info.size, ch->l_info.width, ch->l_info.ranks,
> > + ch->s_info.size, ch->s_info.width, ch->s_info.ranks);
>
> %u instead of %d? Ditto for all debug prints.
Doesn't really matter for these small values. But no harm in %u either
so might as well I suppose.
>
> Reviewed-by: Jani Nikula <jani.nikula at intel.com>
>
>
> >
> > return 0;
> > }
> > @@ -1154,7 +1150,7 @@ intel_is_dram_symmetric(u32 val_ch0, u32 val_ch1,
> > (ch0->s_info.size == 0 ||
> > (ch0->l_info.size == ch0->s_info.size &&
> > ch0->l_info.width == ch0->s_info.width &&
> > - ch0->l_info.rank == ch0->s_info.rank)));
> > + ch0->l_info.ranks == ch0->s_info.ranks)));
> > }
> >
> > static int
> > @@ -1185,13 +1181,12 @@ skl_dram_get_channels_info(struct drm_i915_private *dev_priv)
> > * will be same as if single rank memory, so consider single rank
> > * memory.
> > */
> > - if (ch0.rank == I915_DRAM_RANK_SINGLE ||
> > - ch1.rank == I915_DRAM_RANK_SINGLE)
> > - dram_info->rank = I915_DRAM_RANK_SINGLE;
> > + if (ch0.ranks == 1 || ch1.ranks == 1)
> > + dram_info->ranks = 1;
> > else
> > - dram_info->rank = max(ch0.rank, ch1.rank);
> > + dram_info->ranks = max(ch0.ranks, ch1.ranks);
> >
> > - if (dram_info->rank == I915_DRAM_RANK_INVALID) {
> > + if (dram_info->ranks == 0) {
> > DRM_INFO("couldn't get memory rank information\n");
> > return -EINVAL;
> > }
> > @@ -1262,8 +1257,7 @@ bxt_get_dram_info(struct drm_i915_private *dev_priv)
> > * Now read each DUNIT8/9/10/11 to check the rank of each dimms.
> > */
> > for (i = BXT_D_CR_DRP0_DUNIT_START; i <= BXT_D_CR_DRP0_DUNIT_END; i++) {
> > - u8 size, width;
> > - enum dram_rank rank;
> > + u8 size, width, ranks;
> > u32 tmp;
> >
> > val = I915_READ(BXT_D_CR_DRP0_DUNIT(i));
> > @@ -1274,11 +1268,11 @@ bxt_get_dram_info(struct drm_i915_private *dev_priv)
> > tmp = val & BXT_DRAM_RANK_MASK;
> >
> > if (tmp == BXT_DRAM_RANK_SINGLE)
> > - rank = I915_DRAM_RANK_SINGLE;
> > + ranks = 1;
> > else if (tmp == BXT_DRAM_RANK_DUAL)
> > - rank = I915_DRAM_RANK_DUAL;
> > + ranks = 2;
> > else
> > - rank = I915_DRAM_RANK_INVALID;
> > + ranks = 0;
> >
> > tmp = val & BXT_DRAM_SIZE_MASK;
> > if (tmp == BXT_DRAM_SIZE_4GB)
> > @@ -1296,22 +1290,21 @@ bxt_get_dram_info(struct drm_i915_private *dev_priv)
> >
> > tmp = (val & BXT_DRAM_WIDTH_MASK) >> BXT_DRAM_WIDTH_SHIFT;
> > width = (1 << tmp) * 8;
> > - DRM_DEBUG_KMS("dram size:%dGB width:X%d rank:%s\n", size,
> > - width, rank == I915_DRAM_RANK_SINGLE ? "single" :
> > - rank == I915_DRAM_RANK_DUAL ? "dual" : "unknown");
> > + DRM_DEBUG_KMS("dram size:%dGB width:X%d ranks:%d\n",
> > + size, width, ranks);
> >
> > /*
> > * If any of the channel is single rank channel,
> > * worst case output will be same as if single rank
> > * memory, so consider single rank memory.
> > */
> > - if (dram_info->rank == I915_DRAM_RANK_INVALID)
> > - dram_info->rank = rank;
> > - else if (rank == I915_DRAM_RANK_SINGLE)
> > - dram_info->rank = I915_DRAM_RANK_SINGLE;
> > + if (dram_info->ranks == 0)
> > + dram_info->ranks = ranks;
> > + else if (ranks == 1)
> > + dram_info->ranks = 1;
> > }
> >
> > - if (dram_info->rank == I915_DRAM_RANK_INVALID) {
> > + if (dram_info->ranks == 0) {
> > DRM_INFO("couldn't get memory rank information\n");
> > return -EINVAL;
> > }
> > @@ -1328,7 +1321,7 @@ intel_get_dram_info(struct drm_i915_private *dev_priv)
> > int ret;
> >
> > dram_info->valid = false;
> > - dram_info->rank = I915_DRAM_RANK_INVALID;
> > + dram_info->ranks = 0;
> > dram_info->bandwidth_kbps = 0;
> > dram_info->num_channels = 0;
> >
> > @@ -1358,9 +1351,8 @@ intel_get_dram_info(struct drm_i915_private *dev_priv)
> > sprintf(bandwidth_str, "unknown");
> > DRM_DEBUG_KMS("DRAM bandwidth:%s, total-channels: %u\n",
> > bandwidth_str, dram_info->num_channels);
> > - DRM_DEBUG_KMS("DRAM rank: %s rank 16GB-dimm:%s\n",
> > - (dram_info->rank == I915_DRAM_RANK_DUAL) ?
> > - "dual" : "single", yesno(dram_info->is_16gb_dimm));
> > + DRM_DEBUG_KMS("DRAM ranks: %d, 16GB-dimm:%s\n",
> > + dram_info->ranks, yesno(dram_info->is_16gb_dimm));
> > }
> >
> > /**
> > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> > index cc09caf3870e..c9cb13a6edaf 100644
> > --- a/drivers/gpu/drm/i915/i915_drv.h
> > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > @@ -1833,11 +1833,7 @@ struct drm_i915_private {
> > bool valid;
> > bool is_16gb_dimm;
> > u8 num_channels;
> > - enum dram_rank {
> > - I915_DRAM_RANK_INVALID = 0,
> > - I915_DRAM_RANK_SINGLE,
> > - I915_DRAM_RANK_DUAL
> > - } rank;
> > + u8 ranks;
> > u32 bandwidth_kbps;
> > bool symmetric_memory;
> > } dram_info;
> > @@ -2071,10 +2067,9 @@ struct drm_i915_private {
> >
> > struct dram_channel_info {
> > struct info {
> > - u8 size, width;
> > - enum dram_rank rank;
> > + u8 size, width, ranks;
> > } l_info, s_info;
> > - enum dram_rank rank;
> > + u8 ranks;
> > bool is_16gb_dimm;
> > };
>
> --
> Jani Nikula, Intel Open Source Graphics Center
--
Ville Syrjälä
Intel
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