From patchwork Mon Mar 25 11:49:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Micha=C5=82_Winiarski?= X-Patchwork-Id: 10868911 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ABA7313B5 for ; Mon, 25 Mar 2019 11:50:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9638F292BE for ; Mon, 25 Mar 2019 11:50:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 89E05292C5; Mon, 25 Mar 2019 11:50:27 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 897C5292BE for ; Mon, 25 Mar 2019 11:50:26 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1FDD06E34D; Mon, 25 Mar 2019 11:50:26 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id 815F96E34D for ; Mon, 25 Mar 2019 11:50:25 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Mar 2019 04:50:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,256,1549958400"; d="scan'208";a="217336562" Received: from irsmsx102.ger.corp.intel.com ([163.33.3.155]) by orsmga001.jf.intel.com with ESMTP; 25 Mar 2019 04:50:24 -0700 Received: from localhost (172.28.172.64) by IRSMSX102.ger.corp.intel.com (163.33.3.155) with Microsoft SMTP Server (TLS) id 14.3.408.0; Mon, 25 Mar 2019 11:50:22 +0000 From: =?utf-8?q?Micha=C5=82_Winiarski?= To: Date: Mon, 25 Mar 2019 12:49:46 +0100 Message-ID: <20190325114946.23485-1-michal.winiarski@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190322162037.10159-1-michal.winiarski@intel.com> References: <20190322162037.10159-1-michal.winiarski@intel.com> MIME-Version: 1.0 X-Originating-IP: [172.28.172.64] Subject: [Intel-gfx] [PATCH v2] Revert "drm/i915: Introduce private PAT management" X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP This reverts commit 4395890a48551982549d222d1923e2833dac47cf. It's been over a year since this was merged, and the actual users of intel_ppat_get / intel_ppat_put never materialized. Time to remove it! v2: Unbreak suspend (Chris) Fixes: 4395890a4855 ("drm/i915: Introduce private PAT management") Signed-off-by: Michał Winiarski Cc: Chris Wilson Cc: Joonas Lahtinen Cc: Rodrigo Vivi Cc: Zhi Wang Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 2 - drivers/gpu/drm/i915/i915_gem_gtt.c | 279 +++++----------------------- drivers/gpu/drm/i915/i915_gem_gtt.h | 36 ---- 3 files changed, 42 insertions(+), 275 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index fefcb39aefc4..d29a3f23f80f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1656,8 +1656,6 @@ struct drm_i915_private { DECLARE_HASHTABLE(mm_structs, 7); struct mutex mm_lock; - struct intel_ppat ppat; - /* Kernel Modesetting */ struct intel_crtc *plane_to_crtc_mapping[I915_MAX_PIPES]; diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index b9e0e3a00223..34e87697116b 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -2881,203 +2881,26 @@ static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size) return 0; } -static struct intel_ppat_entry * -__alloc_ppat_entry(struct intel_ppat *ppat, unsigned int index, u8 value) +static void cnl_setup_private_ppat(struct drm_i915_private *dev_priv) { - struct intel_ppat_entry *entry = &ppat->entries[index]; - - GEM_BUG_ON(index >= ppat->max_entries); - GEM_BUG_ON(test_bit(index, ppat->used)); - - entry->ppat = ppat; - entry->value = value; - kref_init(&entry->ref); - set_bit(index, ppat->used); - set_bit(index, ppat->dirty); - - return entry; -} - -static void __free_ppat_entry(struct intel_ppat_entry *entry) -{ - struct intel_ppat *ppat = entry->ppat; - unsigned int index = entry - ppat->entries; - - GEM_BUG_ON(index >= ppat->max_entries); - GEM_BUG_ON(!test_bit(index, ppat->used)); - - entry->value = ppat->clear_value; - clear_bit(index, ppat->used); - set_bit(index, ppat->dirty); -} - -/** - * intel_ppat_get - get a usable PPAT entry - * @i915: i915 device instance - * @value: the PPAT value required by the caller - * - * The function tries to search if there is an existing PPAT entry which - * matches with the required value. If perfectly matched, the existing PPAT - * entry will be used. If only partially matched, it will try to check if - * there is any available PPAT index. If yes, it will allocate a new PPAT - * index for the required entry and update the HW. If not, the partially - * matched entry will be used. - */ -const struct intel_ppat_entry * -intel_ppat_get(struct drm_i915_private *i915, u8 value) -{ - struct intel_ppat *ppat = &i915->ppat; - struct intel_ppat_entry *entry = NULL; - unsigned int scanned, best_score; - int i; - - GEM_BUG_ON(!ppat->max_entries); - - scanned = best_score = 0; - for_each_set_bit(i, ppat->used, ppat->max_entries) { - unsigned int score; - - score = ppat->match(ppat->entries[i].value, value); - if (score > best_score) { - entry = &ppat->entries[i]; - if (score == INTEL_PPAT_PERFECT_MATCH) { - kref_get(&entry->ref); - return entry; - } - best_score = score; - } - scanned++; - } - - if (scanned == ppat->max_entries) { - if (!entry) - return ERR_PTR(-ENOSPC); - - kref_get(&entry->ref); - return entry; - } - - i = find_first_zero_bit(ppat->used, ppat->max_entries); - entry = __alloc_ppat_entry(ppat, i, value); - ppat->update_hw(i915); - return entry; -} - -static void release_ppat(struct kref *kref) -{ - struct intel_ppat_entry *entry = - container_of(kref, struct intel_ppat_entry, ref); - struct drm_i915_private *i915 = entry->ppat->i915; - - __free_ppat_entry(entry); - entry->ppat->update_hw(i915); -} - -/** - * intel_ppat_put - put back the PPAT entry got from intel_ppat_get() - * @entry: an intel PPAT entry - * - * Put back the PPAT entry got from intel_ppat_get(). If the PPAT index of the - * entry is dynamically allocated, its reference count will be decreased. Once - * the reference count becomes into zero, the PPAT index becomes free again. - */ -void intel_ppat_put(const struct intel_ppat_entry *entry) -{ - struct intel_ppat *ppat = entry->ppat; - unsigned int index = entry - ppat->entries; - - GEM_BUG_ON(!ppat->max_entries); - - kref_put(&ppat->entries[index].ref, release_ppat); -} - -static void cnl_private_pat_update_hw(struct drm_i915_private *dev_priv) -{ - struct intel_ppat *ppat = &dev_priv->ppat; - int i; - - for_each_set_bit(i, ppat->dirty, ppat->max_entries) { - I915_WRITE(GEN10_PAT_INDEX(i), ppat->entries[i].value); - clear_bit(i, ppat->dirty); - } -} - -static void bdw_private_pat_update_hw(struct drm_i915_private *dev_priv) -{ - struct intel_ppat *ppat = &dev_priv->ppat; - u64 pat = 0; - int i; - - for (i = 0; i < ppat->max_entries; i++) - pat |= GEN8_PPAT(i, ppat->entries[i].value); - - bitmap_clear(ppat->dirty, 0, ppat->max_entries); - - I915_WRITE(GEN8_PRIVATE_PAT_LO, lower_32_bits(pat)); - I915_WRITE(GEN8_PRIVATE_PAT_HI, upper_32_bits(pat)); -} - -static unsigned int bdw_private_pat_match(u8 src, u8 dst) -{ - unsigned int score = 0; - enum { - AGE_MATCH = BIT(0), - TC_MATCH = BIT(1), - CA_MATCH = BIT(2), - }; - - /* Cache attribute has to be matched. */ - if (GEN8_PPAT_GET_CA(src) != GEN8_PPAT_GET_CA(dst)) - return 0; - - score |= CA_MATCH; - - if (GEN8_PPAT_GET_TC(src) == GEN8_PPAT_GET_TC(dst)) - score |= TC_MATCH; - - if (GEN8_PPAT_GET_AGE(src) == GEN8_PPAT_GET_AGE(dst)) - score |= AGE_MATCH; - - if (score == (AGE_MATCH | TC_MATCH | CA_MATCH)) - return INTEL_PPAT_PERFECT_MATCH; - - return score; -} - -static unsigned int chv_private_pat_match(u8 src, u8 dst) -{ - return (CHV_PPAT_GET_SNOOP(src) == CHV_PPAT_GET_SNOOP(dst)) ? - INTEL_PPAT_PERFECT_MATCH : 0; -} - -static void cnl_setup_private_ppat(struct intel_ppat *ppat) -{ - ppat->max_entries = 8; - ppat->update_hw = cnl_private_pat_update_hw; - ppat->match = bdw_private_pat_match; - ppat->clear_value = GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3); - - __alloc_ppat_entry(ppat, 0, GEN8_PPAT_WB | GEN8_PPAT_LLC); - __alloc_ppat_entry(ppat, 1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC); - __alloc_ppat_entry(ppat, 2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC); - __alloc_ppat_entry(ppat, 3, GEN8_PPAT_UC); - __alloc_ppat_entry(ppat, 4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)); - __alloc_ppat_entry(ppat, 5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)); - __alloc_ppat_entry(ppat, 6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)); - __alloc_ppat_entry(ppat, 7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3)); + I915_WRITE(GEN10_PAT_INDEX(0), GEN8_PPAT_WB | GEN8_PPAT_LLC); + I915_WRITE(GEN10_PAT_INDEX(1), GEN8_PPAT_WC | GEN8_PPAT_LLCELLC); + I915_WRITE(GEN10_PAT_INDEX(2), GEN8_PPAT_WT | GEN8_PPAT_LLCELLC); + I915_WRITE(GEN10_PAT_INDEX(3), GEN8_PPAT_UC); + I915_WRITE(GEN10_PAT_INDEX(4), GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)); + I915_WRITE(GEN10_PAT_INDEX(5), GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)); + I915_WRITE(GEN10_PAT_INDEX(6), GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)); + I915_WRITE(GEN10_PAT_INDEX(7), GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3)); } /* The GGTT and PPGTT need a private PPAT setup in order to handle cacheability * bits. When using advanced contexts each context stores its own PAT, but * writing this data shouldn't be harmful even in those cases. */ -static void bdw_setup_private_ppat(struct intel_ppat *ppat) +static void bdw_setup_private_ppat(struct drm_i915_private *dev_priv) { - ppat->max_entries = 8; - ppat->update_hw = bdw_private_pat_update_hw; - ppat->match = bdw_private_pat_match; - ppat->clear_value = GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3); + u64 pat; - if (!HAS_PPGTT(ppat->i915)) { + if (!HAS_PPGTT(dev_priv)) { /* Spec: "For GGTT, there is NO pat_sel[2:0] from the entry, * so RTL will always use the value corresponding to * pat_sel = 000". @@ -3091,26 +2914,25 @@ static void bdw_setup_private_ppat(struct intel_ppat *ppat) * So we can still hold onto all our assumptions wrt cpu * clflushing on LLC machines. */ - __alloc_ppat_entry(ppat, 0, GEN8_PPAT_UC); - return; + pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC); /* for normal objects, no eLLC */ } - __alloc_ppat_entry(ppat, 0, GEN8_PPAT_WB | GEN8_PPAT_LLC); /* for normal objects, no eLLC */ - __alloc_ppat_entry(ppat, 1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC); /* for something pointing to ptes? */ - __alloc_ppat_entry(ppat, 2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC); /* for scanout with eLLC */ - __alloc_ppat_entry(ppat, 3, GEN8_PPAT_UC); /* Uncached objects, mostly for scanout */ - __alloc_ppat_entry(ppat, 4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)); - __alloc_ppat_entry(ppat, 5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)); - __alloc_ppat_entry(ppat, 6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)); - __alloc_ppat_entry(ppat, 7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3)); + pat = GEN8_PPAT(0, GEN8_PPAT_WB | GEN8_PPAT_LLC) | /* for normal objects, no eLLC */ + GEN8_PPAT(1, GEN8_PPAT_WC | GEN8_PPAT_LLCELLC) | /* for something pointing to ptes? */ + GEN8_PPAT(2, GEN8_PPAT_WT | GEN8_PPAT_LLCELLC) | /* for scanout with eLLC */ + GEN8_PPAT(3, GEN8_PPAT_UC) | /* Uncached objects, mostly for scanout */ + GEN8_PPAT(4, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(0)) | + GEN8_PPAT(5, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(1)) | + GEN8_PPAT(6, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(2)) | + GEN8_PPAT(7, GEN8_PPAT_WB | GEN8_PPAT_LLCELLC | GEN8_PPAT_AGE(3)); + + I915_WRITE(GEN8_PRIVATE_PAT_LO, lower_32_bits(pat)); + I915_WRITE(GEN8_PRIVATE_PAT_HI, upper_32_bits(pat)); } -static void chv_setup_private_ppat(struct intel_ppat *ppat) +static void chv_setup_private_ppat(struct drm_i915_private *dev_priv) { - ppat->max_entries = 8; - ppat->update_hw = bdw_private_pat_update_hw; - ppat->match = chv_private_pat_match; - ppat->clear_value = CHV_PPAT_SNOOP; + u64 pat; /* * Map WB on BDW to snooped on CHV. @@ -3131,14 +2953,17 @@ static void chv_setup_private_ppat(struct intel_ppat *ppat) * in order to keep the global status page working. */ - __alloc_ppat_entry(ppat, 0, CHV_PPAT_SNOOP); - __alloc_ppat_entry(ppat, 1, 0); - __alloc_ppat_entry(ppat, 2, 0); - __alloc_ppat_entry(ppat, 3, 0); - __alloc_ppat_entry(ppat, 4, CHV_PPAT_SNOOP); - __alloc_ppat_entry(ppat, 5, CHV_PPAT_SNOOP); - __alloc_ppat_entry(ppat, 6, CHV_PPAT_SNOOP); - __alloc_ppat_entry(ppat, 7, CHV_PPAT_SNOOP); + pat = GEN8_PPAT(0, CHV_PPAT_SNOOP) | + GEN8_PPAT(1, 0) | + GEN8_PPAT(2, 0) | + GEN8_PPAT(3, 0) | + GEN8_PPAT(4, CHV_PPAT_SNOOP) | + GEN8_PPAT(5, CHV_PPAT_SNOOP) | + GEN8_PPAT(6, CHV_PPAT_SNOOP) | + GEN8_PPAT(7, CHV_PPAT_SNOOP); + + I915_WRITE(GEN8_PRIVATE_PAT_LO, lower_32_bits(pat)); + I915_WRITE(GEN8_PRIVATE_PAT_HI, upper_32_bits(pat)); } static void gen6_gmch_remove(struct i915_address_space *vm) @@ -3151,27 +2976,12 @@ static void gen6_gmch_remove(struct i915_address_space *vm) static void setup_private_pat(struct drm_i915_private *dev_priv) { - struct intel_ppat *ppat = &dev_priv->ppat; - int i; - - ppat->i915 = dev_priv; - if (INTEL_GEN(dev_priv) >= 10) - cnl_setup_private_ppat(ppat); + cnl_setup_private_ppat(dev_priv); else if (IS_CHERRYVIEW(dev_priv) || IS_GEN9_LP(dev_priv)) - chv_setup_private_ppat(ppat); + chv_setup_private_ppat(dev_priv); else - bdw_setup_private_ppat(ppat); - - GEM_BUG_ON(ppat->max_entries > INTEL_MAX_PPAT_ENTRIES); - - for_each_clear_bit(i, ppat->used, ppat->max_entries) { - ppat->entries[i].value = ppat->clear_value; - ppat->entries[i].ppat = ppat; - set_bit(i, ppat->dirty); - } - - ppat->update_hw(dev_priv); + bdw_setup_private_ppat(dev_priv); } static int gen8_gmch_probe(struct i915_ggtt *ggtt) @@ -3518,13 +3328,8 @@ void i915_gem_restore_gtt_mappings(struct drm_i915_private *dev_priv) mutex_unlock(&ggtt->vm.mutex); - if (INTEL_GEN(dev_priv) >= 8) { - struct intel_ppat *ppat = &dev_priv->ppat; - - bitmap_set(ppat->dirty, 0, ppat->max_entries); - dev_priv->ppat.update_hw(dev_priv); - return; - } + if (INTEL_GEN(dev_priv) >= 8) + setup_private_pat(dev_priv); } static struct scatterlist * diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h index b76ab4c2a0e6..e260bd81702e 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.h +++ b/drivers/gpu/drm/i915/i915_gem_gtt.h @@ -153,11 +153,6 @@ typedef u64 gen8_ppgtt_pml4e_t; #define GEN8_PPAT_ELLC_OVERRIDE (0<<2) #define GEN8_PPAT(i, x) ((u64)(x) << ((i) * 8)) -#define GEN8_PPAT_GET_CA(x) ((x) & 3) -#define GEN8_PPAT_GET_TC(x) ((x) & (3 << 2)) -#define GEN8_PPAT_GET_AGE(x) ((x) & (3 << 4)) -#define CHV_PPAT_GET_SNOOP(x) ((x) & (1 << 6)) - #define GEN8_PDE_IPS_64K BIT(11) #define GEN8_PDE_PS_2M BIT(7) @@ -560,37 +555,6 @@ i915_vm_to_ggtt(struct i915_address_space *vm) return container_of(vm, struct i915_ggtt, vm); } -#define INTEL_MAX_PPAT_ENTRIES 8 -#define INTEL_PPAT_PERFECT_MATCH (~0U) - -struct intel_ppat; - -struct intel_ppat_entry { - struct intel_ppat *ppat; - struct kref ref; - u8 value; -}; - -struct intel_ppat { - struct intel_ppat_entry entries[INTEL_MAX_PPAT_ENTRIES]; - DECLARE_BITMAP(used, INTEL_MAX_PPAT_ENTRIES); - DECLARE_BITMAP(dirty, INTEL_MAX_PPAT_ENTRIES); - unsigned int max_entries; - u8 clear_value; - /* - * Return a score to show how two PPAT values match, - * a INTEL_PPAT_PERFECT_MATCH indicates a perfect match - */ - unsigned int (*match)(u8 src, u8 dst); - void (*update_hw)(struct drm_i915_private *i915); - - struct drm_i915_private *i915; -}; - -const struct intel_ppat_entry * -intel_ppat_get(struct drm_i915_private *i915, u8 value); -void intel_ppat_put(const struct intel_ppat_entry *entry); - int i915_gem_init_aliasing_ppgtt(struct drm_i915_private *i915); void i915_gem_fini_aliasing_ppgtt(struct drm_i915_private *i915);