From patchwork Wed Jul 29 16:23:52 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michel Thierry X-Patchwork-Id: 6895261 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 500289F358 for ; Wed, 29 Jul 2015 16:24:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 39EEC20495 for ; Wed, 29 Jul 2015 16:24:36 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 0489E20490 for ; Wed, 29 Jul 2015 16:24:35 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 470516EC2B; Wed, 29 Jul 2015 09:24:34 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id 42AA76EC22 for ; Wed, 29 Jul 2015 09:24:14 -0700 (PDT) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 29 Jul 2015 09:24:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,571,1432623600"; d="scan'208";a="737993673" Received: from michelth-linux2.isw.intel.com ([10.102.226.189]) by orsmga001.jf.intel.com with ESMTP; 29 Jul 2015 09:24:14 -0700 From: Michel Thierry To: intel-gfx@lists.freedesktop.org Date: Wed, 29 Jul 2015 17:23:52 +0100 Message-Id: <1438187043-34267-9-git-send-email-michel.thierry@intel.com> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1438187043-34267-1-git-send-email-michel.thierry@intel.com> References: <1438187043-34267-1-git-send-email-michel.thierry@intel.com> Cc: akash.goel@intel.com Subject: [Intel-gfx] [PATCH v6 08/19] drm/i915/gen8: Add 4 level switching infrastructure and lrc support X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In 64b (48bit canonical) PPGTT addressing, the PDP0 register contains the base address to PML4, while the other PDP registers are ignored. In LRC, the addressing mode must be specified in every context descriptor, and the base address to PML4 is stored in the reg state. v2: PML4 update in legacy context switch is left for historic reasons, the preferred mode of operation is with lrc context based submission. v3: s/gen8_map_page_directory/gen8_setup_page_directory and s/gen8_map_page_directory_pointer/gen8_setup_page_directory_pointer. Also, clflush will be needed for bxt. (Akash) v4: Squashed lrc-specific code and use a macro to set PML4 register. v5: Rebase after Mika's ppgtt cleanup / scratch merge patch series. PDP update in bb_start is only for legacy 32b mode. v6: Rebase after final merged version of Mika's ppgtt/scratch patches. v7: There is no need to update the pml4 register value in execlists_update_context. (Akash) v8: Move pd and pdp setup functions to a previous patch, they do not belong here. (Akash) Cc: Akash Goel Signed-off-by: Ben Widawsky Signed-off-by: Michel Thierry (v2+) --- drivers/gpu/drm/i915/i915_gem_gtt.c | 17 +++++++---- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_lrc.c | 60 ++++++++++++++++++++++++++----------- 3 files changed, 55 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 4179b80..c6c8af7 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -656,8 +656,8 @@ static int gen8_write_pdp(struct drm_i915_gem_request *req, return 0; } -static int gen8_mm_switch(struct i915_hw_ppgtt *ppgtt, - struct drm_i915_gem_request *req) +static int gen8_legacy_mm_switch(struct i915_hw_ppgtt *ppgtt, + struct drm_i915_gem_request *req) { int i, ret; @@ -672,6 +672,12 @@ static int gen8_mm_switch(struct i915_hw_ppgtt *ppgtt, return 0; } +static int gen8_48b_mm_switch(struct i915_hw_ppgtt *ppgtt, + struct drm_i915_gem_request *req) +{ + return gen8_write_pdp(req, 0, px_dma(&ppgtt->pml4)); +} + static void gen8_ppgtt_clear_pte_range(struct i915_address_space *vm, struct i915_page_directory_pointer *pdp, uint64_t start, @@ -1318,14 +1324,13 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) ppgtt->base.unbind_vma = ppgtt_unbind_vma; ppgtt->base.bind_vma = ppgtt_bind_vma; - ppgtt->switch_mm = gen8_mm_switch; - if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) { ret = setup_px(ppgtt->base.dev, &ppgtt->pml4); if (ret) goto free_scratch; ppgtt->base.total = 1ULL << 48; + ppgtt->switch_mm = gen8_48b_mm_switch; } else { ret = __pdp_init(false, &ppgtt->pdp); if (ret) @@ -1340,6 +1345,7 @@ static int gen8_ppgtt_init(struct i915_hw_ppgtt *ppgtt) */ ppgtt->base.total = to_i915(ppgtt->base.dev)->gtt.base.total; + ppgtt->switch_mm = gen8_legacy_mm_switch; trace_i915_page_directory_pointer_entry_alloc(&ppgtt->base, 0, 0, GEN8_PML4E_SHIFT); @@ -1537,8 +1543,9 @@ static void gen8_ppgtt_enable(struct drm_device *dev) int j; for_each_ring(ring, dev_priv, j) { + u32 four_level = USES_FULL_48BIT_PPGTT(dev) ? GEN8_GFX_PPGTT_48B : 0; I915_WRITE(RING_MODE_GEN7(ring), - _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE)); + _MASKED_BIT_ENABLE(GFX_PPGTT_ENABLE | four_level)); } } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3a77678..5bd1b6a 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1670,6 +1670,7 @@ enum skl_disp_power_wells { #define GFX_REPLAY_MODE (1<<11) #define GFX_PSMI_GRANULARITY (1<<10) #define GFX_PPGTT_ENABLE (1<<9) +#define GEN8_GFX_PPGTT_48B (1<<7) #define VLV_DISPLAY_BASE 0x180000 #define VLV_MIPI_BASE VLV_DISPLAY_BASE diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 99bba8e..0b65188 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -196,13 +196,21 @@ reg_state[CTX_PDP ## n ## _LDW+1] = lower_32_bits(_addr); \ } +#define ASSIGN_CTX_PML4(ppgtt, reg_state) { \ + reg_state[CTX_PDP0_UDW + 1] = upper_32_bits(px_dma(&ppgtt->pml4)); \ + reg_state[CTX_PDP0_LDW + 1] = lower_32_bits(px_dma(&ppgtt->pml4)); \ +} + enum { ADVANCED_CONTEXT = 0, - LEGACY_CONTEXT, + LEGACY_32B_CONTEXT, ADVANCED_AD_CONTEXT, LEGACY_64B_CONTEXT }; -#define GEN8_CTX_MODE_SHIFT 3 +#define GEN8_CTX_ADDRESSING_MODE_SHIFT 3 +#define GEN8_CTX_ADDRESSING_MODE(dev) (USES_FULL_48BIT_PPGTT(dev) ?\ + LEGACY_64B_CONTEXT :\ + LEGACY_32B_CONTEXT) enum { FAULT_AND_HANG = 0, FAULT_AND_HALT, /* Debug only */ @@ -273,7 +281,7 @@ static uint64_t execlists_ctx_descriptor(struct drm_i915_gem_request *rq) WARN_ON(lrca & 0xFFFFFFFF00000FFFULL); desc = GEN8_CTX_VALID; - desc |= LEGACY_CONTEXT << GEN8_CTX_MODE_SHIFT; + desc |= GEN8_CTX_ADDRESSING_MODE(dev) << GEN8_CTX_ADDRESSING_MODE_SHIFT; if (IS_GEN8(ctx_obj->base.dev)) desc |= GEN8_CTX_L3LLC_COHERENT; desc |= GEN8_CTX_PRIVILEGE; @@ -348,10 +356,12 @@ static int execlists_update_context(struct drm_i915_gem_request *rq) reg_state[CTX_RING_TAIL+1] = rq->tail; reg_state[CTX_RING_BUFFER_START+1] = i915_gem_obj_ggtt_offset(rb_obj); - /* True PPGTT with dynamic page allocation: update PDP registers and - * point the unallocated PDPs to the scratch page - */ - if (ppgtt) { + if (ppgtt && !USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) { + /* True 32b PPGTT with dynamic page allocation: update PDP + * registers and point the unallocated PDPs to scratch page. + * PML4 is allocated during ppgtt init, so this is not needed + * in 48-bit mode. + */ ASSIGN_CTX_PDP(ppgtt, reg_state, 3); ASSIGN_CTX_PDP(ppgtt, reg_state, 2); ASSIGN_CTX_PDP(ppgtt, reg_state, 1); @@ -1512,12 +1522,15 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req, * Ideally, we should set Force PD Restore in ctx descriptor, * but we can't. Force Restore would be a second option, but * it is unsafe in case of lite-restore (because the ctx is - * not idle). */ + * not idle). PML4 is allocated during ppgtt init so this is + * not needed in 48-bit.*/ if (req->ctx->ppgtt && (intel_ring_flag(req->ring) & req->ctx->ppgtt->pd_dirty_rings)) { - ret = intel_logical_ring_emit_pdps(req); - if (ret) - return ret; + if (GEN8_CTX_ADDRESSING_MODE(req->i915) == LEGACY_32B_CONTEXT) { + ret = intel_logical_ring_emit_pdps(req); + if (ret) + return ret; + } req->ctx->ppgtt->pd_dirty_rings &= ~intel_ring_flag(req->ring); } @@ -2198,13 +2211,24 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o reg_state[CTX_PDP0_UDW] = GEN8_RING_PDP_UDW(ring, 0); reg_state[CTX_PDP0_LDW] = GEN8_RING_PDP_LDW(ring, 0); - /* With dynamic page allocation, PDPs may not be allocated at this point, - * Point the unallocated PDPs to the scratch page - */ - ASSIGN_CTX_PDP(ppgtt, reg_state, 3); - ASSIGN_CTX_PDP(ppgtt, reg_state, 2); - ASSIGN_CTX_PDP(ppgtt, reg_state, 1); - ASSIGN_CTX_PDP(ppgtt, reg_state, 0); + if (USES_FULL_48BIT_PPGTT(ppgtt->base.dev)) { + /* 64b PPGTT (48bit canonical) + * PDP0_DESCRIPTOR contains the base address to PML4 and + * other PDP Descriptors are ignored. + */ + ASSIGN_CTX_PML4(ppgtt, reg_state); + } else { + /* 32b PPGTT + * PDP*_DESCRIPTOR contains the base address of space supported. + * With dynamic page allocation, PDPs may not be allocated at + * this point. Point the unallocated PDPs to the scratch page + */ + ASSIGN_CTX_PDP(ppgtt, reg_state, 3); + ASSIGN_CTX_PDP(ppgtt, reg_state, 2); + ASSIGN_CTX_PDP(ppgtt, reg_state, 1); + ASSIGN_CTX_PDP(ppgtt, reg_state, 0); + } + if (ring->id == RCS) { reg_state[CTX_LRI_HEADER_2] = MI_LOAD_REGISTER_IMM(1); reg_state[CTX_R_PWR_CLK_STATE] = GEN8_R_PWR_CLK_STATE;