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@@ -1,965 +0,0 @@
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-From 5c9f8c2dbdbe53818bcde6aa6695e1331e5f841f Mon Sep 17 00:00:00 2001
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-From: Jonathan McDowell <[email protected]>
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-Date: Sat, 14 Nov 2020 14:02:33 +0000
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-Subject: dmaengine: qcom: Add ADM driver
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-
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-Add the DMA engine driver for the QCOM Application Data Mover (ADM) DMA
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-controller found in the MSM8x60 and IPQ/APQ8064 platforms.
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-
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-The ADM supports both memory to memory transactions and memory
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-to/from peripheral device transactions. The controller also provides
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-flow control capabilities for transactions to/from peripheral devices.
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-
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-The initial release of this driver supports slave transfers to/from
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-peripherals and also incorporates CRCI (client rate control interface)
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-flow control.
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-
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-The hardware only supports a 32 bit physical address, so specifying
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-!PHYS_ADDR_T_64BIT gives maximum COMPILE_TEST coverage without having to
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-spend effort on kludging things in the code that will never actually be
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-needed on real hardware.
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-
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-Signed-off-by: Andy Gross <[email protected]>
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-Signed-off-by: Thomas Pedersen <[email protected]>
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-Signed-off-by: Jonathan McDowell <[email protected]>
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-Link: https://lore.kernel.org/r/[email protected]
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-Signed-off-by: Vinod Koul <[email protected]>
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----
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- drivers/dma/qcom/Kconfig | 11 +
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- drivers/dma/qcom/Makefile | 1 +
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- drivers/dma/qcom/qcom_adm.c | 903 ++++++++++++++++++++++++++++++++++++++++++++
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- 3 files changed, 915 insertions(+)
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- create mode 100644 drivers/dma/qcom/qcom_adm.c
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-
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---- a/drivers/dma/qcom/Kconfig
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-+++ b/drivers/dma/qcom/Kconfig
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-@@ -1,4 +1,15 @@
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- # SPDX-License-Identifier: GPL-2.0-only
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-+config QCOM_ADM
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-+ tristate "Qualcomm ADM support"
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-+ depends on (ARCH_QCOM || COMPILE_TEST) && !PHYS_ADDR_T_64BIT
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-+ select DMA_ENGINE
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-+ select DMA_VIRTUAL_CHANNELS
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-+ help
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-+ Enable support for the Qualcomm Application Data Mover (ADM) DMA
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-+ controller, as present on MSM8x60, APQ8064, and IPQ8064 devices.
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-+ This controller provides DMA capabilities for both general purpose
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-+ and on-chip peripheral devices.
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-+
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- config QCOM_BAM_DMA
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- tristate "QCOM BAM DMA support"
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- depends on ARCH_QCOM || (COMPILE_TEST && OF && ARM)
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---- a/drivers/dma/qcom/Makefile
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-+++ b/drivers/dma/qcom/Makefile
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-@@ -1,4 +1,5 @@
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- # SPDX-License-Identifier: GPL-2.0
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-+obj-$(CONFIG_QCOM_ADM) += qcom_adm.o
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- obj-$(CONFIG_QCOM_BAM_DMA) += bam_dma.o
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- obj-$(CONFIG_QCOM_HIDMA_MGMT) += hdma_mgmt.o
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- hdma_mgmt-objs := hidma_mgmt.o hidma_mgmt_sys.o
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---- /dev/null
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-+++ b/drivers/dma/qcom/qcom_adm.c
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-@@ -0,0 +1,903 @@
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-+// SPDX-License-Identifier: GPL-2.0-only
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-+/*
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-+ * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
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-+ */
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-+
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-+#include <linux/clk.h>
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-+#include <linux/delay.h>
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-+#include <linux/device.h>
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-+#include <linux/dmaengine.h>
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-+#include <linux/dma-mapping.h>
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-+#include <linux/init.h>
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-+#include <linux/interrupt.h>
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-+#include <linux/io.h>
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-+#include <linux/kernel.h>
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-+#include <linux/module.h>
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-+#include <linux/of.h>
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-+#include <linux/of_address.h>
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-+#include <linux/of_irq.h>
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-+#include <linux/of_dma.h>
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-+#include <linux/platform_device.h>
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-+#include <linux/reset.h>
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-+#include <linux/scatterlist.h>
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-+#include <linux/slab.h>
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-+
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-+#include "../dmaengine.h"
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-+#include "../virt-dma.h"
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-+
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-+/* ADM registers - calculated from channel number and security domain */
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-+#define ADM_CHAN_MULTI 0x4
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-+#define ADM_CI_MULTI 0x4
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-+#define ADM_CRCI_MULTI 0x4
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-+#define ADM_EE_MULTI 0x800
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-+#define ADM_CHAN_OFFS(chan) (ADM_CHAN_MULTI * (chan))
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-+#define ADM_EE_OFFS(ee) (ADM_EE_MULTI * (ee))
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-+#define ADM_CHAN_EE_OFFS(chan, ee) (ADM_CHAN_OFFS(chan) + ADM_EE_OFFS(ee))
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-+#define ADM_CHAN_OFFS(chan) (ADM_CHAN_MULTI * (chan))
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-+#define ADM_CI_OFFS(ci) (ADM_CHAN_OFF(ci))
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-+#define ADM_CH_CMD_PTR(chan, ee) (ADM_CHAN_EE_OFFS(chan, ee))
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-+#define ADM_CH_RSLT(chan, ee) (0x40 + ADM_CHAN_EE_OFFS(chan, ee))
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-+#define ADM_CH_FLUSH_STATE0(chan, ee) (0x80 + ADM_CHAN_EE_OFFS(chan, ee))
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-+#define ADM_CH_STATUS_SD(chan, ee) (0x200 + ADM_CHAN_EE_OFFS(chan, ee))
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-+#define ADM_CH_CONF(chan) (0x240 + ADM_CHAN_OFFS(chan))
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-+#define ADM_CH_RSLT_CONF(chan, ee) (0x300 + ADM_CHAN_EE_OFFS(chan, ee))
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-+#define ADM_SEC_DOMAIN_IRQ_STATUS(ee) (0x380 + ADM_EE_OFFS(ee))
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-+#define ADM_CI_CONF(ci) (0x390 + (ci) * ADM_CI_MULTI)
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-+#define ADM_GP_CTL 0x3d8
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-+#define ADM_CRCI_CTL(crci, ee) (0x400 + (crci) * ADM_CRCI_MULTI + \
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-+ ADM_EE_OFFS(ee))
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-+
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-+/* channel status */
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-+#define ADM_CH_STATUS_VALID BIT(1)
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-+
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-+/* channel result */
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-+#define ADM_CH_RSLT_VALID BIT(31)
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-+#define ADM_CH_RSLT_ERR BIT(3)
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-+#define ADM_CH_RSLT_FLUSH BIT(2)
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-+#define ADM_CH_RSLT_TPD BIT(1)
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-+
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-+/* channel conf */
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-+#define ADM_CH_CONF_SHADOW_EN BIT(12)
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-+#define ADM_CH_CONF_MPU_DISABLE BIT(11)
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-+#define ADM_CH_CONF_PERM_MPU_CONF BIT(9)
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-+#define ADM_CH_CONF_FORCE_RSLT_EN BIT(7)
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-+#define ADM_CH_CONF_SEC_DOMAIN(ee) ((((ee) & 0x3) << 4) | (((ee) & 0x4) << 11))
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-+
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-+/* channel result conf */
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-+#define ADM_CH_RSLT_CONF_FLUSH_EN BIT(1)
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-+#define ADM_CH_RSLT_CONF_IRQ_EN BIT(0)
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-+
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-+/* CRCI CTL */
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-+#define ADM_CRCI_CTL_MUX_SEL BIT(18)
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-+#define ADM_CRCI_CTL_RST BIT(17)
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-+
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-+/* CI configuration */
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-+#define ADM_CI_RANGE_END(x) ((x) << 24)
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-+#define ADM_CI_RANGE_START(x) ((x) << 16)
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-+#define ADM_CI_BURST_4_WORDS BIT(2)
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-+#define ADM_CI_BURST_8_WORDS BIT(3)
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-+
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-+/* GP CTL */
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-+#define ADM_GP_CTL_LP_EN BIT(12)
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-+#define ADM_GP_CTL_LP_CNT(x) ((x) << 8)
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-+
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-+/* Command pointer list entry */
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-+#define ADM_CPLE_LP BIT(31)
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-+#define ADM_CPLE_CMD_PTR_LIST BIT(29)
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-+
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-+/* Command list entry */
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-+#define ADM_CMD_LC BIT(31)
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-+#define ADM_CMD_DST_CRCI(n) (((n) & 0xf) << 7)
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-+#define ADM_CMD_SRC_CRCI(n) (((n) & 0xf) << 3)
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-+
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-+#define ADM_CMD_TYPE_SINGLE 0x0
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-+#define ADM_CMD_TYPE_BOX 0x3
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-+
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-+#define ADM_CRCI_MUX_SEL BIT(4)
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-+#define ADM_DESC_ALIGN 8
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-+#define ADM_MAX_XFER (SZ_64K - 1)
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-+#define ADM_MAX_ROWS (SZ_64K - 1)
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-+#define ADM_MAX_CHANNELS 16
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-+
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-+struct adm_desc_hw_box {
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-+ u32 cmd;
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-+ u32 src_addr;
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-+ u32 dst_addr;
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-+ u32 row_len;
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-+ u32 num_rows;
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-+ u32 row_offset;
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-+};
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-+
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-+struct adm_desc_hw_single {
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-+ u32 cmd;
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-+ u32 src_addr;
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-+ u32 dst_addr;
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-+ u32 len;
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-+};
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-+
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-+struct adm_async_desc {
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-+ struct virt_dma_desc vd;
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-+ struct adm_device *adev;
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-+
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-+ size_t length;
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-+ enum dma_transfer_direction dir;
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-+ dma_addr_t dma_addr;
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-+ size_t dma_len;
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-+
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-+ void *cpl;
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-+ dma_addr_t cp_addr;
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-+ u32 crci;
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-+ u32 mux;
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-+ u32 blk_size;
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-+};
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-+
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-+struct adm_chan {
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-+ struct virt_dma_chan vc;
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-+ struct adm_device *adev;
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-+
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-+ /* parsed from DT */
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-+ u32 id; /* channel id */
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-+
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-+ struct adm_async_desc *curr_txd;
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-+ struct dma_slave_config slave;
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-+ struct list_head node;
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-+
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-+ int error;
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-+ int initialized;
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-+};
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-+
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-+static inline struct adm_chan *to_adm_chan(struct dma_chan *common)
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-+{
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-+ return container_of(common, struct adm_chan, vc.chan);
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-+}
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-+
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-+struct adm_device {
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-+ void __iomem *regs;
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-+ struct device *dev;
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-+ struct dma_device common;
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-+ struct device_dma_parameters dma_parms;
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-+ struct adm_chan *channels;
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-+
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-+ u32 ee;
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-+
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-+ struct clk *core_clk;
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-+ struct clk *iface_clk;
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-+
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-+ struct reset_control *clk_reset;
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-+ struct reset_control *c0_reset;
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-+ struct reset_control *c1_reset;
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-+ struct reset_control *c2_reset;
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-+ int irq;
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-+};
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-+
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-+/**
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-+ * adm_free_chan - Frees dma resources associated with the specific channel
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-+ *
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-+ * Free all allocated descriptors associated with this channel
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-+ *
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-+ */
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-+static void adm_free_chan(struct dma_chan *chan)
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-+{
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-+ /* free all queued descriptors */
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-+ vchan_free_chan_resources(to_virt_chan(chan));
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-+}
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-+
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-+/**
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-+ * adm_get_blksize - Get block size from burst value
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-+ *
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-+ */
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-+static int adm_get_blksize(unsigned int burst)
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-+{
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-+ int ret;
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-+
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-+ switch (burst) {
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-+ case 16:
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-+ case 32:
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-+ case 64:
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-+ case 128:
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-+ ret = ffs(burst >> 4) - 1;
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-+ break;
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-+ case 192:
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-+ ret = 4;
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-+ break;
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-+ case 256:
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-+ ret = 5;
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-+ break;
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-+ default:
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-+ ret = -EINVAL;
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-+ break;
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-+ }
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-+
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-+ return ret;
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-+}
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-+
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-+/**
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-+ * adm_process_fc_descriptors - Process descriptors for flow controlled xfers
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-+ *
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-+ * @achan: ADM channel
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-+ * @desc: Descriptor memory pointer
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-+ * @sg: Scatterlist entry
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-+ * @crci: CRCI value
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-+ * @burst: Burst size of transaction
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-+ * @direction: DMA transfer direction
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-+ */
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-+static void *adm_process_fc_descriptors(struct adm_chan *achan, void *desc,
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-+ struct scatterlist *sg, u32 crci,
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-+ u32 burst,
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-+ enum dma_transfer_direction direction)
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-+{
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-+ struct adm_desc_hw_box *box_desc = NULL;
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-+ struct adm_desc_hw_single *single_desc;
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-+ u32 remainder = sg_dma_len(sg);
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-+ u32 rows, row_offset, crci_cmd;
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-+ u32 mem_addr = sg_dma_address(sg);
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-+ u32 *incr_addr = &mem_addr;
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-+ u32 *src, *dst;
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-+
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-+ if (direction == DMA_DEV_TO_MEM) {
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-+ crci_cmd = ADM_CMD_SRC_CRCI(crci);
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-+ row_offset = burst;
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-+ src = &achan->slave.src_addr;
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-+ dst = &mem_addr;
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-+ } else {
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-+ crci_cmd = ADM_CMD_DST_CRCI(crci);
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-+ row_offset = burst << 16;
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-+ src = &mem_addr;
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-+ dst = &achan->slave.dst_addr;
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-+ }
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-+
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-+ while (remainder >= burst) {
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-+ box_desc = desc;
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-+ box_desc->cmd = ADM_CMD_TYPE_BOX | crci_cmd;
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-+ box_desc->row_offset = row_offset;
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-+ box_desc->src_addr = *src;
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-+ box_desc->dst_addr = *dst;
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-+
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-+ rows = remainder / burst;
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-+ rows = min_t(u32, rows, ADM_MAX_ROWS);
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-+ box_desc->num_rows = rows << 16 | rows;
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-+ box_desc->row_len = burst << 16 | burst;
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-+
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-+ *incr_addr += burst * rows;
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-+ remainder -= burst * rows;
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-+ desc += sizeof(*box_desc);
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-+ }
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-+
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-+ /* if leftover bytes, do one single descriptor */
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-+ if (remainder) {
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-+ single_desc = desc;
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-+ single_desc->cmd = ADM_CMD_TYPE_SINGLE | crci_cmd;
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-+ single_desc->len = remainder;
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-+ single_desc->src_addr = *src;
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-+ single_desc->dst_addr = *dst;
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-+ desc += sizeof(*single_desc);
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-+
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-+ if (sg_is_last(sg))
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-+ single_desc->cmd |= ADM_CMD_LC;
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-+ } else {
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-+ if (box_desc && sg_is_last(sg))
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-+ box_desc->cmd |= ADM_CMD_LC;
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-+ }
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-+
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-+ return desc;
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-+}
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-+
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-+/**
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-+ * adm_process_non_fc_descriptors - Process descriptors for non-fc xfers
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-+ *
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-+ * @achan: ADM channel
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-+ * @desc: Descriptor memory pointer
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-+ * @sg: Scatterlist entry
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-+ * @direction: DMA transfer direction
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-+ */
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-+static void *adm_process_non_fc_descriptors(struct adm_chan *achan, void *desc,
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-+ struct scatterlist *sg,
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-+ enum dma_transfer_direction direction)
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-+{
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-+ struct adm_desc_hw_single *single_desc;
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-+ u32 remainder = sg_dma_len(sg);
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-+ u32 mem_addr = sg_dma_address(sg);
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-+ u32 *incr_addr = &mem_addr;
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-+ u32 *src, *dst;
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-+
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-+ if (direction == DMA_DEV_TO_MEM) {
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-+ src = &achan->slave.src_addr;
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|
-+ dst = &mem_addr;
|
|
|
-+ } else {
|
|
|
-+ src = &mem_addr;
|
|
|
-+ dst = &achan->slave.dst_addr;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ do {
|
|
|
-+ single_desc = desc;
|
|
|
-+ single_desc->cmd = ADM_CMD_TYPE_SINGLE;
|
|
|
-+ single_desc->src_addr = *src;
|
|
|
-+ single_desc->dst_addr = *dst;
|
|
|
-+ single_desc->len = (remainder > ADM_MAX_XFER) ?
|
|
|
-+ ADM_MAX_XFER : remainder;
|
|
|
-+
|
|
|
-+ remainder -= single_desc->len;
|
|
|
-+ *incr_addr += single_desc->len;
|
|
|
-+ desc += sizeof(*single_desc);
|
|
|
-+ } while (remainder);
|
|
|
-+
|
|
|
-+ /* set last command if this is the end of the whole transaction */
|
|
|
-+ if (sg_is_last(sg))
|
|
|
-+ single_desc->cmd |= ADM_CMD_LC;
|
|
|
-+
|
|
|
-+ return desc;
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_prep_slave_sg - Prep slave sg transaction
|
|
|
-+ *
|
|
|
-+ * @chan: dma channel
|
|
|
-+ * @sgl: scatter gather list
|
|
|
-+ * @sg_len: length of sg
|
|
|
-+ * @direction: DMA transfer direction
|
|
|
-+ * @flags: DMA flags
|
|
|
-+ * @context: transfer context (unused)
|
|
|
-+ */
|
|
|
-+static struct dma_async_tx_descriptor *adm_prep_slave_sg(struct dma_chan *chan,
|
|
|
-+ struct scatterlist *sgl,
|
|
|
-+ unsigned int sg_len,
|
|
|
-+ enum dma_transfer_direction direction,
|
|
|
-+ unsigned long flags,
|
|
|
-+ void *context)
|
|
|
-+{
|
|
|
-+ struct adm_chan *achan = to_adm_chan(chan);
|
|
|
-+ struct adm_device *adev = achan->adev;
|
|
|
-+ struct adm_async_desc *async_desc;
|
|
|
-+ struct scatterlist *sg;
|
|
|
-+ dma_addr_t cple_addr;
|
|
|
-+ u32 i, burst;
|
|
|
-+ u32 single_count = 0, box_count = 0, crci = 0;
|
|
|
-+ void *desc;
|
|
|
-+ u32 *cple;
|
|
|
-+ int blk_size = 0;
|
|
|
-+
|
|
|
-+ if (!is_slave_direction(direction)) {
|
|
|
-+ dev_err(adev->dev, "invalid dma direction\n");
|
|
|
-+ return NULL;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /*
|
|
|
-+ * get burst value from slave configuration
|
|
|
-+ */
|
|
|
-+ burst = (direction == DMA_MEM_TO_DEV) ?
|
|
|
-+ achan->slave.dst_maxburst :
|
|
|
-+ achan->slave.src_maxburst;
|
|
|
-+
|
|
|
-+ /* if using flow control, validate burst and crci values */
|
|
|
-+ if (achan->slave.device_fc) {
|
|
|
-+ blk_size = adm_get_blksize(burst);
|
|
|
-+ if (blk_size < 0) {
|
|
|
-+ dev_err(adev->dev, "invalid burst value: %d\n",
|
|
|
-+ burst);
|
|
|
-+ return ERR_PTR(-EINVAL);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ crci = achan->slave.slave_id & 0xf;
|
|
|
-+ if (!crci || achan->slave.slave_id > 0x1f) {
|
|
|
-+ dev_err(adev->dev, "invalid crci value\n");
|
|
|
-+ return ERR_PTR(-EINVAL);
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /* iterate through sgs and compute allocation size of structures */
|
|
|
-+ for_each_sg(sgl, sg, sg_len, i) {
|
|
|
-+ if (achan->slave.device_fc) {
|
|
|
-+ box_count += DIV_ROUND_UP(sg_dma_len(sg) / burst,
|
|
|
-+ ADM_MAX_ROWS);
|
|
|
-+ if (sg_dma_len(sg) % burst)
|
|
|
-+ single_count++;
|
|
|
-+ } else {
|
|
|
-+ single_count += DIV_ROUND_UP(sg_dma_len(sg),
|
|
|
-+ ADM_MAX_XFER);
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ async_desc = kzalloc(sizeof(*async_desc), GFP_NOWAIT);
|
|
|
-+ if (!async_desc)
|
|
|
-+ return ERR_PTR(-ENOMEM);
|
|
|
-+
|
|
|
-+ if (crci)
|
|
|
-+ async_desc->mux = achan->slave.slave_id & ADM_CRCI_MUX_SEL ?
|
|
|
-+ ADM_CRCI_CTL_MUX_SEL : 0;
|
|
|
-+ async_desc->crci = crci;
|
|
|
-+ async_desc->blk_size = blk_size;
|
|
|
-+ async_desc->dma_len = single_count * sizeof(struct adm_desc_hw_single) +
|
|
|
-+ box_count * sizeof(struct adm_desc_hw_box) +
|
|
|
-+ sizeof(*cple) + 2 * ADM_DESC_ALIGN;
|
|
|
-+
|
|
|
-+ async_desc->cpl = kzalloc(async_desc->dma_len, GFP_NOWAIT);
|
|
|
-+ if (!async_desc->cpl)
|
|
|
-+ goto free;
|
|
|
-+
|
|
|
-+ async_desc->adev = adev;
|
|
|
-+
|
|
|
-+ /* both command list entry and descriptors must be 8 byte aligned */
|
|
|
-+ cple = PTR_ALIGN(async_desc->cpl, ADM_DESC_ALIGN);
|
|
|
-+ desc = PTR_ALIGN(cple + 1, ADM_DESC_ALIGN);
|
|
|
-+
|
|
|
-+ for_each_sg(sgl, sg, sg_len, i) {
|
|
|
-+ async_desc->length += sg_dma_len(sg);
|
|
|
-+
|
|
|
-+ if (achan->slave.device_fc)
|
|
|
-+ desc = adm_process_fc_descriptors(achan, desc, sg, crci,
|
|
|
-+ burst, direction);
|
|
|
-+ else
|
|
|
-+ desc = adm_process_non_fc_descriptors(achan, desc, sg,
|
|
|
-+ direction);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ async_desc->dma_addr = dma_map_single(adev->dev, async_desc->cpl,
|
|
|
-+ async_desc->dma_len,
|
|
|
-+ DMA_TO_DEVICE);
|
|
|
-+ if (dma_mapping_error(adev->dev, async_desc->dma_addr))
|
|
|
-+ goto free;
|
|
|
-+
|
|
|
-+ cple_addr = async_desc->dma_addr + ((void *)cple - async_desc->cpl);
|
|
|
-+
|
|
|
-+ /* init cmd list */
|
|
|
-+ dma_sync_single_for_cpu(adev->dev, cple_addr, sizeof(*cple),
|
|
|
-+ DMA_TO_DEVICE);
|
|
|
-+ *cple = ADM_CPLE_LP;
|
|
|
-+ *cple |= (async_desc->dma_addr + ADM_DESC_ALIGN) >> 3;
|
|
|
-+ dma_sync_single_for_device(adev->dev, cple_addr, sizeof(*cple),
|
|
|
-+ DMA_TO_DEVICE);
|
|
|
-+
|
|
|
-+ return vchan_tx_prep(&achan->vc, &async_desc->vd, flags);
|
|
|
-+
|
|
|
-+free:
|
|
|
-+ kfree(async_desc);
|
|
|
-+ return ERR_PTR(-ENOMEM);
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_terminate_all - terminate all transactions on a channel
|
|
|
-+ * @achan: adm dma channel
|
|
|
-+ *
|
|
|
-+ * Dequeues and frees all transactions, aborts current transaction
|
|
|
-+ * No callbacks are done
|
|
|
-+ *
|
|
|
-+ */
|
|
|
-+static int adm_terminate_all(struct dma_chan *chan)
|
|
|
-+{
|
|
|
-+ struct adm_chan *achan = to_adm_chan(chan);
|
|
|
-+ struct adm_device *adev = achan->adev;
|
|
|
-+ unsigned long flags;
|
|
|
-+ LIST_HEAD(head);
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&achan->vc.lock, flags);
|
|
|
-+ vchan_get_all_descriptors(&achan->vc, &head);
|
|
|
-+
|
|
|
-+ /* send flush command to terminate current transaction */
|
|
|
-+ writel_relaxed(0x0,
|
|
|
-+ adev->regs + ADM_CH_FLUSH_STATE0(achan->id, adev->ee));
|
|
|
-+
|
|
|
-+ spin_unlock_irqrestore(&achan->vc.lock, flags);
|
|
|
-+
|
|
|
-+ vchan_dma_desc_free_list(&achan->vc, &head);
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int adm_slave_config(struct dma_chan *chan, struct dma_slave_config *cfg)
|
|
|
-+{
|
|
|
-+ struct adm_chan *achan = to_adm_chan(chan);
|
|
|
-+ unsigned long flag;
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&achan->vc.lock, flag);
|
|
|
-+ memcpy(&achan->slave, cfg, sizeof(struct dma_slave_config));
|
|
|
-+ spin_unlock_irqrestore(&achan->vc.lock, flag);
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_start_dma - start next transaction
|
|
|
-+ * @achan - ADM dma channel
|
|
|
-+ */
|
|
|
-+static void adm_start_dma(struct adm_chan *achan)
|
|
|
-+{
|
|
|
-+ struct virt_dma_desc *vd = vchan_next_desc(&achan->vc);
|
|
|
-+ struct adm_device *adev = achan->adev;
|
|
|
-+ struct adm_async_desc *async_desc;
|
|
|
-+
|
|
|
-+ lockdep_assert_held(&achan->vc.lock);
|
|
|
-+
|
|
|
-+ if (!vd)
|
|
|
-+ return;
|
|
|
-+
|
|
|
-+ list_del(&vd->node);
|
|
|
-+
|
|
|
-+ /* write next command list out to the CMD FIFO */
|
|
|
-+ async_desc = container_of(vd, struct adm_async_desc, vd);
|
|
|
-+ achan->curr_txd = async_desc;
|
|
|
-+
|
|
|
-+ /* reset channel error */
|
|
|
-+ achan->error = 0;
|
|
|
-+
|
|
|
-+ if (!achan->initialized) {
|
|
|
-+ /* enable interrupts */
|
|
|
-+ writel(ADM_CH_CONF_SHADOW_EN |
|
|
|
-+ ADM_CH_CONF_PERM_MPU_CONF |
|
|
|
-+ ADM_CH_CONF_MPU_DISABLE |
|
|
|
-+ ADM_CH_CONF_SEC_DOMAIN(adev->ee),
|
|
|
-+ adev->regs + ADM_CH_CONF(achan->id));
|
|
|
-+
|
|
|
-+ writel(ADM_CH_RSLT_CONF_IRQ_EN | ADM_CH_RSLT_CONF_FLUSH_EN,
|
|
|
-+ adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));
|
|
|
-+
|
|
|
-+ achan->initialized = 1;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /* set the crci block size if this transaction requires CRCI */
|
|
|
-+ if (async_desc->crci) {
|
|
|
-+ writel(async_desc->mux | async_desc->blk_size,
|
|
|
-+ adev->regs + ADM_CRCI_CTL(async_desc->crci, adev->ee));
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /* make sure IRQ enable doesn't get reordered */
|
|
|
-+ wmb();
|
|
|
-+
|
|
|
-+ /* write next command list out to the CMD FIFO */
|
|
|
-+ writel(ALIGN(async_desc->dma_addr, ADM_DESC_ALIGN) >> 3,
|
|
|
-+ adev->regs + ADM_CH_CMD_PTR(achan->id, adev->ee));
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_dma_irq - irq handler for ADM controller
|
|
|
-+ * @irq: IRQ of interrupt
|
|
|
-+ * @data: callback data
|
|
|
-+ *
|
|
|
-+ * IRQ handler for the bam controller
|
|
|
-+ */
|
|
|
-+static irqreturn_t adm_dma_irq(int irq, void *data)
|
|
|
-+{
|
|
|
-+ struct adm_device *adev = data;
|
|
|
-+ u32 srcs, i;
|
|
|
-+ struct adm_async_desc *async_desc;
|
|
|
-+ unsigned long flags;
|
|
|
-+
|
|
|
-+ srcs = readl_relaxed(adev->regs +
|
|
|
-+ ADM_SEC_DOMAIN_IRQ_STATUS(adev->ee));
|
|
|
-+
|
|
|
-+ for (i = 0; i < ADM_MAX_CHANNELS; i++) {
|
|
|
-+ struct adm_chan *achan = &adev->channels[i];
|
|
|
-+ u32 status, result;
|
|
|
-+
|
|
|
-+ if (srcs & BIT(i)) {
|
|
|
-+ status = readl_relaxed(adev->regs +
|
|
|
-+ ADM_CH_STATUS_SD(i, adev->ee));
|
|
|
-+
|
|
|
-+ /* if no result present, skip */
|
|
|
-+ if (!(status & ADM_CH_STATUS_VALID))
|
|
|
-+ continue;
|
|
|
-+
|
|
|
-+ result = readl_relaxed(adev->regs +
|
|
|
-+ ADM_CH_RSLT(i, adev->ee));
|
|
|
-+
|
|
|
-+ /* no valid results, skip */
|
|
|
-+ if (!(result & ADM_CH_RSLT_VALID))
|
|
|
-+ continue;
|
|
|
-+
|
|
|
-+ /* flag error if transaction was flushed or failed */
|
|
|
-+ if (result & (ADM_CH_RSLT_ERR | ADM_CH_RSLT_FLUSH))
|
|
|
-+ achan->error = 1;
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&achan->vc.lock, flags);
|
|
|
-+ async_desc = achan->curr_txd;
|
|
|
-+
|
|
|
-+ achan->curr_txd = NULL;
|
|
|
-+
|
|
|
-+ if (async_desc) {
|
|
|
-+ vchan_cookie_complete(&async_desc->vd);
|
|
|
-+
|
|
|
-+ /* kick off next DMA */
|
|
|
-+ adm_start_dma(achan);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ spin_unlock_irqrestore(&achan->vc.lock, flags);
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ return IRQ_HANDLED;
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_tx_status - returns status of transaction
|
|
|
-+ * @chan: dma channel
|
|
|
-+ * @cookie: transaction cookie
|
|
|
-+ * @txstate: DMA transaction state
|
|
|
-+ *
|
|
|
-+ * Return status of dma transaction
|
|
|
-+ */
|
|
|
-+static enum dma_status adm_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
|
|
|
-+ struct dma_tx_state *txstate)
|
|
|
-+{
|
|
|
-+ struct adm_chan *achan = to_adm_chan(chan);
|
|
|
-+ struct virt_dma_desc *vd;
|
|
|
-+ enum dma_status ret;
|
|
|
-+ unsigned long flags;
|
|
|
-+ size_t residue = 0;
|
|
|
-+
|
|
|
-+ ret = dma_cookie_status(chan, cookie, txstate);
|
|
|
-+ if (ret == DMA_COMPLETE || !txstate)
|
|
|
-+ return ret;
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&achan->vc.lock, flags);
|
|
|
-+
|
|
|
-+ vd = vchan_find_desc(&achan->vc, cookie);
|
|
|
-+ if (vd)
|
|
|
-+ residue = container_of(vd, struct adm_async_desc, vd)->length;
|
|
|
-+
|
|
|
-+ spin_unlock_irqrestore(&achan->vc.lock, flags);
|
|
|
-+
|
|
|
-+ /*
|
|
|
-+ * residue is either the full length if it is in the issued list, or 0
|
|
|
-+ * if it is in progress. We have no reliable way of determining
|
|
|
-+ * anything inbetween
|
|
|
-+ */
|
|
|
-+ dma_set_residue(txstate, residue);
|
|
|
-+
|
|
|
-+ if (achan->error)
|
|
|
-+ return DMA_ERROR;
|
|
|
-+
|
|
|
-+ return ret;
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_issue_pending - starts pending transactions
|
|
|
-+ * @chan: dma channel
|
|
|
-+ *
|
|
|
-+ * Issues all pending transactions and starts DMA
|
|
|
-+ */
|
|
|
-+static void adm_issue_pending(struct dma_chan *chan)
|
|
|
-+{
|
|
|
-+ struct adm_chan *achan = to_adm_chan(chan);
|
|
|
-+ unsigned long flags;
|
|
|
-+
|
|
|
-+ spin_lock_irqsave(&achan->vc.lock, flags);
|
|
|
-+
|
|
|
-+ if (vchan_issue_pending(&achan->vc) && !achan->curr_txd)
|
|
|
-+ adm_start_dma(achan);
|
|
|
-+ spin_unlock_irqrestore(&achan->vc.lock, flags);
|
|
|
-+}
|
|
|
-+
|
|
|
-+/**
|
|
|
-+ * adm_dma_free_desc - free descriptor memory
|
|
|
-+ * @vd: virtual descriptor
|
|
|
-+ *
|
|
|
-+ */
|
|
|
-+static void adm_dma_free_desc(struct virt_dma_desc *vd)
|
|
|
-+{
|
|
|
-+ struct adm_async_desc *async_desc = container_of(vd,
|
|
|
-+ struct adm_async_desc, vd);
|
|
|
-+
|
|
|
-+ dma_unmap_single(async_desc->adev->dev, async_desc->dma_addr,
|
|
|
-+ async_desc->dma_len, DMA_TO_DEVICE);
|
|
|
-+ kfree(async_desc->cpl);
|
|
|
-+ kfree(async_desc);
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void adm_channel_init(struct adm_device *adev, struct adm_chan *achan,
|
|
|
-+ u32 index)
|
|
|
-+{
|
|
|
-+ achan->id = index;
|
|
|
-+ achan->adev = adev;
|
|
|
-+
|
|
|
-+ vchan_init(&achan->vc, &adev->common);
|
|
|
-+ achan->vc.desc_free = adm_dma_free_desc;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int adm_dma_probe(struct platform_device *pdev)
|
|
|
-+{
|
|
|
-+ struct adm_device *adev;
|
|
|
-+ int ret;
|
|
|
-+ u32 i;
|
|
|
-+
|
|
|
-+ adev = devm_kzalloc(&pdev->dev, sizeof(*adev), GFP_KERNEL);
|
|
|
-+ if (!adev)
|
|
|
-+ return -ENOMEM;
|
|
|
-+
|
|
|
-+ adev->dev = &pdev->dev;
|
|
|
-+
|
|
|
-+ adev->regs = devm_platform_ioremap_resource(pdev, 0);
|
|
|
-+ if (IS_ERR(adev->regs))
|
|
|
-+ return PTR_ERR(adev->regs);
|
|
|
-+
|
|
|
-+ adev->irq = platform_get_irq(pdev, 0);
|
|
|
-+ if (adev->irq < 0)
|
|
|
-+ return adev->irq;
|
|
|
-+
|
|
|
-+ ret = of_property_read_u32(pdev->dev.of_node, "qcom,ee", &adev->ee);
|
|
|
-+ if (ret) {
|
|
|
-+ dev_err(adev->dev, "Execution environment unspecified\n");
|
|
|
-+ return ret;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ adev->core_clk = devm_clk_get(adev->dev, "core");
|
|
|
-+ if (IS_ERR(adev->core_clk))
|
|
|
-+ return PTR_ERR(adev->core_clk);
|
|
|
-+
|
|
|
-+ adev->iface_clk = devm_clk_get(adev->dev, "iface");
|
|
|
-+ if (IS_ERR(adev->iface_clk))
|
|
|
-+ return PTR_ERR(adev->iface_clk);
|
|
|
-+
|
|
|
-+ adev->clk_reset = devm_reset_control_get_exclusive(&pdev->dev, "clk");
|
|
|
-+ if (IS_ERR(adev->clk_reset)) {
|
|
|
-+ dev_err(adev->dev, "failed to get ADM0 reset\n");
|
|
|
-+ return PTR_ERR(adev->clk_reset);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ adev->c0_reset = devm_reset_control_get_exclusive(&pdev->dev, "c0");
|
|
|
-+ if (IS_ERR(adev->c0_reset)) {
|
|
|
-+ dev_err(adev->dev, "failed to get ADM0 C0 reset\n");
|
|
|
-+ return PTR_ERR(adev->c0_reset);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ adev->c1_reset = devm_reset_control_get_exclusive(&pdev->dev, "c1");
|
|
|
-+ if (IS_ERR(adev->c1_reset)) {
|
|
|
-+ dev_err(adev->dev, "failed to get ADM0 C1 reset\n");
|
|
|
-+ return PTR_ERR(adev->c1_reset);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ adev->c2_reset = devm_reset_control_get_exclusive(&pdev->dev, "c2");
|
|
|
-+ if (IS_ERR(adev->c2_reset)) {
|
|
|
-+ dev_err(adev->dev, "failed to get ADM0 C2 reset\n");
|
|
|
-+ return PTR_ERR(adev->c2_reset);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ ret = clk_prepare_enable(adev->core_clk);
|
|
|
-+ if (ret) {
|
|
|
-+ dev_err(adev->dev, "failed to prepare/enable core clock\n");
|
|
|
-+ return ret;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ ret = clk_prepare_enable(adev->iface_clk);
|
|
|
-+ if (ret) {
|
|
|
-+ dev_err(adev->dev, "failed to prepare/enable iface clock\n");
|
|
|
-+ goto err_disable_core_clk;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ reset_control_assert(adev->clk_reset);
|
|
|
-+ reset_control_assert(adev->c0_reset);
|
|
|
-+ reset_control_assert(adev->c1_reset);
|
|
|
-+ reset_control_assert(adev->c2_reset);
|
|
|
-+
|
|
|
-+ udelay(2);
|
|
|
-+
|
|
|
-+ reset_control_deassert(adev->clk_reset);
|
|
|
-+ reset_control_deassert(adev->c0_reset);
|
|
|
-+ reset_control_deassert(adev->c1_reset);
|
|
|
-+ reset_control_deassert(adev->c2_reset);
|
|
|
-+
|
|
|
-+ adev->channels = devm_kcalloc(adev->dev, ADM_MAX_CHANNELS,
|
|
|
-+ sizeof(*adev->channels), GFP_KERNEL);
|
|
|
-+
|
|
|
-+ if (!adev->channels) {
|
|
|
-+ ret = -ENOMEM;
|
|
|
-+ goto err_disable_clks;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /* allocate and initialize channels */
|
|
|
-+ INIT_LIST_HEAD(&adev->common.channels);
|
|
|
-+
|
|
|
-+ for (i = 0; i < ADM_MAX_CHANNELS; i++)
|
|
|
-+ adm_channel_init(adev, &adev->channels[i], i);
|
|
|
-+
|
|
|
-+ /* reset CRCIs */
|
|
|
-+ for (i = 0; i < 16; i++)
|
|
|
-+ writel(ADM_CRCI_CTL_RST, adev->regs +
|
|
|
-+ ADM_CRCI_CTL(i, adev->ee));
|
|
|
-+
|
|
|
-+ /* configure client interfaces */
|
|
|
-+ writel(ADM_CI_RANGE_START(0x40) | ADM_CI_RANGE_END(0xb0) |
|
|
|
-+ ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(0));
|
|
|
-+ writel(ADM_CI_RANGE_START(0x2a) | ADM_CI_RANGE_END(0x2c) |
|
|
|
-+ ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(1));
|
|
|
-+ writel(ADM_CI_RANGE_START(0x12) | ADM_CI_RANGE_END(0x28) |
|
|
|
-+ ADM_CI_BURST_8_WORDS, adev->regs + ADM_CI_CONF(2));
|
|
|
-+ writel(ADM_GP_CTL_LP_EN | ADM_GP_CTL_LP_CNT(0xf),
|
|
|
-+ adev->regs + ADM_GP_CTL);
|
|
|
-+
|
|
|
-+ ret = devm_request_irq(adev->dev, adev->irq, adm_dma_irq,
|
|
|
-+ 0, "adm_dma", adev);
|
|
|
-+ if (ret)
|
|
|
-+ goto err_disable_clks;
|
|
|
-+
|
|
|
-+ platform_set_drvdata(pdev, adev);
|
|
|
-+
|
|
|
-+ adev->common.dev = adev->dev;
|
|
|
-+ adev->common.dev->dma_parms = &adev->dma_parms;
|
|
|
-+
|
|
|
-+ /* set capabilities */
|
|
|
-+ dma_cap_zero(adev->common.cap_mask);
|
|
|
-+ dma_cap_set(DMA_SLAVE, adev->common.cap_mask);
|
|
|
-+ dma_cap_set(DMA_PRIVATE, adev->common.cap_mask);
|
|
|
-+
|
|
|
-+ /* initialize dmaengine apis */
|
|
|
-+ adev->common.directions = BIT(DMA_DEV_TO_MEM | DMA_MEM_TO_DEV);
|
|
|
-+ adev->common.residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR;
|
|
|
-+ adev->common.src_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
|
-+ adev->common.dst_addr_widths = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
|
-+ adev->common.device_free_chan_resources = adm_free_chan;
|
|
|
-+ adev->common.device_prep_slave_sg = adm_prep_slave_sg;
|
|
|
-+ adev->common.device_issue_pending = adm_issue_pending;
|
|
|
-+ adev->common.device_tx_status = adm_tx_status;
|
|
|
-+ adev->common.device_terminate_all = adm_terminate_all;
|
|
|
-+ adev->common.device_config = adm_slave_config;
|
|
|
-+
|
|
|
-+ ret = dma_async_device_register(&adev->common);
|
|
|
-+ if (ret) {
|
|
|
-+ dev_err(adev->dev, "failed to register dma async device\n");
|
|
|
-+ goto err_disable_clks;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ ret = of_dma_controller_register(pdev->dev.of_node,
|
|
|
-+ of_dma_xlate_by_chan_id,
|
|
|
-+ &adev->common);
|
|
|
-+ if (ret)
|
|
|
-+ goto err_unregister_dma;
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+
|
|
|
-+err_unregister_dma:
|
|
|
-+ dma_async_device_unregister(&adev->common);
|
|
|
-+err_disable_clks:
|
|
|
-+ clk_disable_unprepare(adev->iface_clk);
|
|
|
-+err_disable_core_clk:
|
|
|
-+ clk_disable_unprepare(adev->core_clk);
|
|
|
-+
|
|
|
-+ return ret;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int adm_dma_remove(struct platform_device *pdev)
|
|
|
-+{
|
|
|
-+ struct adm_device *adev = platform_get_drvdata(pdev);
|
|
|
-+ struct adm_chan *achan;
|
|
|
-+ u32 i;
|
|
|
-+
|
|
|
-+ of_dma_controller_free(pdev->dev.of_node);
|
|
|
-+ dma_async_device_unregister(&adev->common);
|
|
|
-+
|
|
|
-+ for (i = 0; i < ADM_MAX_CHANNELS; i++) {
|
|
|
-+ achan = &adev->channels[i];
|
|
|
-+
|
|
|
-+ /* mask IRQs for this channel/EE pair */
|
|
|
-+ writel(0, adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));
|
|
|
-+
|
|
|
-+ tasklet_kill(&adev->channels[i].vc.task);
|
|
|
-+ adm_terminate_all(&adev->channels[i].vc.chan);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ devm_free_irq(adev->dev, adev->irq, adev);
|
|
|
-+
|
|
|
-+ clk_disable_unprepare(adev->core_clk);
|
|
|
-+ clk_disable_unprepare(adev->iface_clk);
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static const struct of_device_id adm_of_match[] = {
|
|
|
-+ { .compatible = "qcom,adm", },
|
|
|
-+ {}
|
|
|
-+};
|
|
|
-+MODULE_DEVICE_TABLE(of, adm_of_match);
|
|
|
-+
|
|
|
-+static struct platform_driver adm_dma_driver = {
|
|
|
-+ .probe = adm_dma_probe,
|
|
|
-+ .remove = adm_dma_remove,
|
|
|
-+ .driver = {
|
|
|
-+ .name = "adm-dma-engine",
|
|
|
-+ .of_match_table = adm_of_match,
|
|
|
-+ },
|
|
|
-+};
|
|
|
-+
|
|
|
-+module_platform_driver(adm_dma_driver);
|
|
|
-+
|
|
|
-+MODULE_AUTHOR("Andy Gross <[email protected]>");
|
|
|
-+MODULE_DESCRIPTION("QCOM ADM DMA engine driver");
|
|
|
-+MODULE_LICENSE("GPL v2");
|