From patchwork Wed Feb 3 17:56:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 1435534 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=synopsys.com header.i=@synopsys.com header.a=rsa-sha256 header.s=mail header.b=FfEmdVR8; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4DW8h331xhz9tlN for ; Thu, 4 Feb 2021 05:04:03 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232370AbhBCSCz (ORCPT ); Wed, 3 Feb 2021 13:02:55 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:40762 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232365AbhBCR60 (ORCPT ); Wed, 3 Feb 2021 12:58:26 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 79CF3C0108; Wed, 3 Feb 2021 17:57:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612375038; bh=gCI3nNoPy8dCurab6Uc+GVpEmLeCzjb3I1ubHtDkaBI=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=FfEmdVR8HYyl9KfcOwHPwM06CqRIQBDcAEwqUPBRNXT9TCslWyVrOfc7u4HqVAPZT qmla2vuiJItwZLL1AIiDHdlEgLVr5r0YZ0DELVg+Tp/z8kQ5pd6R8BErNIpc86ImRa uamqi3OXvmxIcE/Ks/BVdSOYq7k1FuHmXm1jbVSSgyZpzEWovirRyeofCaJge1rwJH xem6Qrvsmmt08Ht4/HCh8FPBbmJYgZnPlMK8Rykiew4dO8aT/iQv/8GoAzJsfx0t0H mTiW1MK6hGxCPSBQRmFKpD/zL4+6PKPOBRys7K0Aa18XYHMgQLyrFrAqWs+LzZvU7i LYmfphKm7gjXw== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 25147A005F; Wed, 3 Feb 2021 17:57:17 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Vinod Koul , Dan Williams , Bjorn Helgaas , Gustavo Pimentel Subject: [PATCH v3 03/15] dmaengine: dw-edma: Add support for the HDMA feature Date: Wed, 3 Feb 2021 18:56:55 +0100 Message-Id: <7d871631910ce66cb310b16c98632f41114576a3.1612374941.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Add support for the HDMA feature. This new feature enables the current eDMA IP to use a deeper prefetch of the linked list, which reduces the algorithm execution latency observed when loading the elements of the list, causing more stable and higher data transfer. Signed-off-by: Gustavo Pimentel --- drivers/dma/dw-edma/dw-edma-core.h | 10 ++++---- drivers/dma/dw-edma/dw-edma-pcie.c | 23 ++++++++--------- drivers/dma/dw-edma/dw-edma-v0-core.c | 42 +++++++++++++++++++++++++++++--- drivers/dma/dw-edma/dw-edma-v0-debugfs.c | 9 +++---- 4 files changed, 60 insertions(+), 24 deletions(-) diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h index 31fc50d..3f9593e 100644 --- a/drivers/dma/dw-edma/dw-edma-core.h +++ b/drivers/dma/dw-edma/dw-edma-core.h @@ -21,9 +21,10 @@ enum dw_edma_dir { EDMA_DIR_READ }; -enum dw_edma_mode { - EDMA_MODE_LEGACY = 0, - EDMA_MODE_UNROLL +enum dw_edma_map_format { + EDMA_MF_EDMA_LEGACY = 0x0, + EDMA_MF_EDMA_UNROLL = 0x1, + EDMA_MF_HDMA_COMPAT = 0x5 }; enum dw_edma_request { @@ -123,8 +124,7 @@ struct dw_edma { struct dw_edma_irq *irq; int nr_irqs; - u32 version; - enum dw_edma_mode mode; + enum dw_edma_map_format mf; struct dw_edma_chan *chan; const struct dw_edma_core_ops *ops; diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c index 1eafc60..c130549 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -30,8 +30,7 @@ struct dw_edma_pcie_data { off_t dt_off; size_t dt_sz; /* Other */ - u32 version; - enum dw_edma_mode mode; + enum dw_edma_map_format mf; u8 irqs; }; @@ -49,8 +48,7 @@ static const struct dw_edma_pcie_data snps_edda_data = { .dt_off = 0x00800000, /* 8 Mbytes */ .dt_sz = 0x03800000, /* 56 Mbytes */ /* Other */ - .version = 0, - .mode = EDMA_MODE_UNROLL, + .mf = EDMA_MF_EDMA_UNROLL, .irqs = 1, }; @@ -69,8 +67,8 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, const struct dw_edma_pcie_data *pdata = (void *)pid->driver_data; struct device *dev = &pdev->dev; struct dw_edma_chip *chip; - int err, nr_irqs; struct dw_edma *dw; + int err, nr_irqs; /* Enable PCI device */ err = pcim_enable_device(pdev); @@ -157,16 +155,19 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, dw->dt_region.paddr += pdata->dt_off; dw->dt_region.sz = pdata->dt_sz; - dw->version = pdata->version; - dw->mode = pdata->mode; + dw->mf = pdata->mf; dw->nr_irqs = nr_irqs; dw->ops = &dw_edma_pcie_core_ops; /* Debug info */ - pci_dbg(pdev, "Version:\t%u\n", dw->version); - - pci_dbg(pdev, "Mode:\t%s\n", - dw->mode == EDMA_MODE_LEGACY ? "Legacy" : "Unroll"); + if (dw->mf == EDMA_MF_EDMA_LEGACY) + pci_dbg(pdev, "Version:\teDMA Port Logic (0x%x)\n", dw->mf); + else if (dw->mf == EDMA_MF_EDMA_UNROLL) + pci_dbg(pdev, "Version:\teDMA Unroll (0x%x)\n", dw->mf); + else if (dw->mf == EDMA_MF_HDMA_COMPAT) + pci_dbg(pdev, "Version:\tHDMA Compatible (0x%x)\n", dw->mf); + else + pci_dbg(pdev, "Version:\tUnknown (0x%x)\n", dw->mf); pci_dbg(pdev, "Registers:\tBAR=%u, off=0x%.8lx, sz=0x%zx bytes, addr(v=%p, p=%pa)\n", pdata->rg_bar, pdata->rg_off, pdata->rg_sz, diff --git a/drivers/dma/dw-edma/dw-edma-v0-core.c b/drivers/dma/dw-edma/dw-edma-v0-core.c index 7888eda..5b0541a 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-core.c +++ b/drivers/dma/dw-edma/dw-edma-v0-core.c @@ -96,7 +96,7 @@ static inline struct dw_edma_v0_regs __iomem *__dw_regs(struct dw_edma *dw) static inline struct dw_edma_v0_ch_regs __iomem * __dw_ch_regs(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch) { - if (dw->mode == EDMA_MODE_LEGACY) + if (dw->mf == EDMA_MF_EDMA_LEGACY) return &(__dw_regs(dw)->type.legacy.ch); if (dir == EDMA_DIR_WRITE) @@ -108,7 +108,7 @@ __dw_ch_regs(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch) static inline void writel_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch, u32 value, void __iomem *addr) { - if (dw->mode == EDMA_MODE_LEGACY) { + if (dw->mf == EDMA_MF_EDMA_LEGACY) { u32 viewport_sel; unsigned long flags; @@ -133,7 +133,7 @@ static inline u32 readl_ch(struct dw_edma *dw, enum dw_edma_dir dir, u16 ch, { u32 value; - if (dw->mode == EDMA_MODE_LEGACY) { + if (dw->mf == EDMA_MF_EDMA_LEGACY) { u32 viewport_sel; unsigned long flags; @@ -365,6 +365,42 @@ void dw_edma_v0_core_start(struct dw_edma_chunk *chunk, bool first) if (first) { /* Enable engine */ SET_RW_32(dw, chan->dir, engine_en, BIT(0)); + if (dw->mf == EDMA_MF_HDMA_COMPAT) { + switch (chan->id) { + case 0: + SET_RW_COMPAT(dw, chan->dir, ch0_pwr_en, + BIT(0)); + break; + case 1: + SET_RW_COMPAT(dw, chan->dir, ch1_pwr_en, + BIT(0)); + break; + case 2: + SET_RW_COMPAT(dw, chan->dir, ch2_pwr_en, + BIT(0)); + break; + case 3: + SET_RW_COMPAT(dw, chan->dir, ch3_pwr_en, + BIT(0)); + break; + case 4: + SET_RW_COMPAT(dw, chan->dir, ch4_pwr_en, + BIT(0)); + break; + case 5: + SET_RW_COMPAT(dw, chan->dir, ch5_pwr_en, + BIT(0)); + break; + case 6: + SET_RW_COMPAT(dw, chan->dir, ch6_pwr_en, + BIT(0)); + break; + case 7: + SET_RW_COMPAT(dw, chan->dir, ch7_pwr_en, + BIT(0)); + break; + } + } /* Interrupt unmask - done, abort */ tmp = GET_RW_32(dw, chan->dir, int_mask); tmp &= ~FIELD_PREP(EDMA_V0_DONE_INT_MASK, BIT(chan->id)); diff --git a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c index a5e2783..157dfc2 100644 --- a/drivers/dma/dw-edma/dw-edma-v0-debugfs.c +++ b/drivers/dma/dw-edma/dw-edma-v0-debugfs.c @@ -55,7 +55,7 @@ struct debugfs_entries { static int dw_edma_debugfs_u32_get(void *data, u64 *val) { void __iomem *reg = (void __force __iomem *)data; - if (dw->mode == EDMA_MODE_LEGACY && + if (dw->mf == EDMA_MF_EDMA_LEGACY && reg >= (void __iomem *)®s->type.legacy.ch) { void __iomem *ptr = ®s->type.legacy.ch; u32 viewport_sel = 0; @@ -174,7 +174,7 @@ static void dw_edma_debugfs_regs_wr(struct dentry *dir) nr_entries = ARRAY_SIZE(debugfs_regs); dw_edma_debugfs_create_x32(debugfs_regs, nr_entries, regs_dir); - if (dw->mode == EDMA_MODE_UNROLL) { + if (dw->mf == EDMA_MF_HDMA_COMPAT) { nr_entries = ARRAY_SIZE(debugfs_unroll_regs); dw_edma_debugfs_create_x32(debugfs_unroll_regs, nr_entries, regs_dir); @@ -243,7 +243,7 @@ static void dw_edma_debugfs_regs_rd(struct dentry *dir) nr_entries = ARRAY_SIZE(debugfs_regs); dw_edma_debugfs_create_x32(debugfs_regs, nr_entries, regs_dir); - if (dw->mode == EDMA_MODE_UNROLL) { + if (dw->mf == EDMA_MF_HDMA_COMPAT) { nr_entries = ARRAY_SIZE(debugfs_unroll_regs); dw_edma_debugfs_create_x32(debugfs_unroll_regs, nr_entries, regs_dir); @@ -297,8 +297,7 @@ void dw_edma_v0_debugfs_on(struct dw_edma_chip *chip) if (!base_dir) return; - debugfs_create_u32("version", 0444, base_dir, &dw->version); - debugfs_create_u32("mode", 0444, base_dir, &dw->mode); + debugfs_create_u32("mf", 0444, base_dir, &dw->mf); debugfs_create_u16("wr_ch_cnt", 0444, base_dir, &dw->wr_ch_cnt); debugfs_create_u16("rd_ch_cnt", 0444, base_dir, &dw->rd_ch_cnt);