From: Jani Nikula <jani.nikula@linux.intel.com>
To: Intel GFX <intel-gfx@lists.freedesktop.org>
Cc: Ben Widawsky <ben@bwidawsk.net>,
Eero Tamminen <eero.t.tamminen@intel.com>
Subject: Re: [PATCH] drm/i915/skl: Update eDRAM calculation
Date: Thu, 14 Apr 2016 11:14:48 +0300 [thread overview]
Message-ID: <87lh4gr4hz.fsf@intel.com> (raw)
In-Reply-To: <87oa9cr4k4.fsf@intel.com>
On Thu, 14 Apr 2016, Jani Nikula <jani.nikula@linux.intel.com> wrote:
> On Wed, 13 Apr 2016, Ben Widawsky <ben@bwidawsk.net> wrote:
>> The two behavioral changes here are the correct detection of the eDRAM size on
>> gen9 (SKL + KBL), and unconditional printing of the eLLC size.
>>
>> Cc: Eero Tamminen <eero.t.tamminen@intel.com>
>> Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
>
> Please see [1].
>
> BR,
> Jani.
>
>
> [1] http://patchwork.freedesktop.org/patch/msgid/1460557604-7126-3-git-send-email-mika.kuoppala@intel.com
I did mean to refer to the entire series
https://patchwork.freedesktop.org/series/5663/
>
>
>> ---
>> drivers/gpu/drm/i915/intel_uncore.c | 16 +++++++++++++---
>> 1 file changed, 13 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
>> index fbc1d21..efef724 100644
>> --- a/drivers/gpu/drm/i915/intel_uncore.c
>> +++ b/drivers/gpu/drm/i915/intel_uncore.c
>> @@ -314,8 +314,17 @@ static void intel_uncore_ellc_detect(struct drm_device *dev)
>> {
>> struct drm_i915_private *dev_priv = dev->dev_private;
>>
>> - if ((IS_HASWELL(dev) || IS_BROADWELL(dev) ||
>> - INTEL_INFO(dev)->gen >= 9) &&
>> + if (INTEL_INFO(dev)->gen >= 9 && HAS_LLC(dev)) {
>> + u32 edramcap = __raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT);
>> + if (edramcap & EDRAM_ENABLED) {
>> + int sets = (edramcap >> 8) & 0x3;
>> + int ways = (edramcap >> 5) & 0x7;
>> + int banks = (edramcap >> 1) & 0xf;
>> +
>> + ways = (ways + 1) * 4;
>> + dev_priv->ellc_size = sets * ways * banks;
>> + }
>> + } else if ((IS_HASWELL(dev) || IS_BROADWELL(dev)) &&
>> (__raw_i915_read32(dev_priv, HSW_EDRAM_PRESENT) & EDRAM_ENABLED)) {
>> /* The docs do not explain exactly how the calculation can be
>> * made. It is somewhat guessable, but for now, it's always
>> @@ -323,8 +332,9 @@ static void intel_uncore_ellc_detect(struct drm_device *dev)
>> * NB: We can't write IDICR yet because we do not have gt funcs
>> * set up */
>> dev_priv->ellc_size = 128;
>> - DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
>> }
>> +
>> + DRM_INFO("Found %zuMB of eLLC\n", dev_priv->ellc_size);
>> }
>>
>> static bool
--
Jani Nikula, Intel Open Source Technology Center
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next prev parent reply other threads:[~2016-04-14 8:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-13 15:52 [PATCH] drm/i915/skl: Update eDRAM calculation Ben Widawsky
2016-04-14 8:13 ` Jani Nikula
2016-04-14 8:14 ` Jani Nikula [this message]
2016-04-14 14:48 ` Ben Widawsky
2016-04-14 14:50 ` Ben Widawsky
2016-04-15 7:23 ` Mika Kuoppala
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