Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1502847 > unrolled thread

[RESEND PATCH v10 00/11] Add support for FDMA DMA controller and slim core rproc found on STi chipsets

Back to article view | Back to linux.kernel

Contents

  [RESEND PATCH v10 00/11] Add support for FDMA DMA controller and slim core rproc found on STi chipsets Peter Griffin <peter.griffin@linaro.org> - 2016-10-18 11:50 +0200
    [PATCH v10 05/11] dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file Peter Griffin <peter.griffin@linaro.org> - 2016-10-18 11:50 +0200
    Re: [RESEND PATCH v10 00/11] Add support for FDMA DMA controller and  slim core rproc found on STi chipsets Vinod Koul <vinod.koul@intel.com> - 2016-10-18 16:40 +0200

#1502847 — [RESEND PATCH v10 00/11] Add support for FDMA DMA controller and slim core rproc found on STi chipsets

Hi Vinod and Bjorn,

This patchset adds support for the Flexible Direct Memory Access (FDMA) core
found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU
with a dedicated firmware. It is a general purpose DMA controller supporting
16 independent channels and data can be moved from memory to memory or between
memory and paced latency critical real time targets.

[..]

V10 series updates remoteproc kconfig subsystem to use 'depends on' rather
than select for the remoteproc core. Remoteproc client drivers now need to
'depends on' for the core part.

This avoids the Kconfig recursive dependency errors and reliance on the DRM
patch included with the v9 series. Patches are also included for enabling the
remoteproc core in the multi_v7 defconfig. All patches for DRM subsystem have
been removed.

Note there is no longer a depedency with the DRM_VIRTIO_GPU driver in this series,
only remoteproc and dmaengine subsystems.

regards,

Peter.

v10 RESEND
 - Rebase on v4.9-rc1

Changes since v9:
 - Update remoteproc Kconfig to 'depends on'
 - Add remoteproc core to multi_v7 defconfig
 - Remove drm patches
 - rebase v4.8

Changes since v8:
 - Add MODULE_ALIAS (Vinod)
 - devm_kzalloc to devm_kcalloc (Vinod)
 - quisce tasklet initialised by vchan_init() (Vinod)
 - Don't make SLIM rproc user selectable (Bjorn)
 - slim_rproc: Ensure clocks enabled before firmware load (Peter)
 - Various code style nits / commit message change (Lee)
 - Separate patch for '\n' kconfig removal (Vinod)
 - Fix clock bug when booting without clk_ignore_unused param

Changes since v7:
 - Rebase on v4.8-rc3 (Peter)
 - Double check that len is <= mem[i].size (Bjorn)
 - Remove if (!fw) checks (Bjorn)
 - Omit reference from fw_ops struct (Bjorn)
 - Call rproc_del() before rproc_put() (Bjorn)
 - Fix some odd line breaks (Bjorn)
 - Rename SLIM_* and slim_* with st prefix (Bjorn)

Changes since v6:
 - Fix recursive Kconfig warning (Patrice)
 - Fix various Intel zero day compiler warnings
 - Remove all changes related to late firmware load (now relies on initramfs) (Peter)

Changes since v5:
 - Remove optional rsc table and go back to dummy resource table (Bjorn)
 - Retry rproc_fw_config_virtio() from rproc_boot() if previously failed (Peter)
 - Fixup some kbuild warnings
 - rebase on v4.7-rc5
 - Remove some patches which were merged via ASoC tree

Changes since v4:
 - Make rsc table optional in remoteproc (Peter)
 - Various fixups to STi audio DT nodes (Arnaud)
 - Bulk rename of xp70 to slim (Peter)
 - Update my email to @linaro.org (Lee)
 - rebase on v4.7-rc2 (Peter)
 - Don't make ST_SLIM_REMOTEPROC user selectable (Bjorn)
 - -EPROBE_DEFER if rproc_boot fails when allocating DMA channel (Arnaud / Peter)
 - Drop some unnecessary headers (Vinod / Bjorn)
 - Change to writel now we have several mappings (Bjorn)
 - Remove io_res, rproc, and some unused structure fields / #define (Bjorn)
 - put clks in error path, also put clks before rproc_put() (Bjorn)
 - Make enum less generic (Bjorn)
 - Make slim_rproc_alloc() return a st_slim_rproc reference (Bjorn)
 - Alphabetical naming in Kconfig & Makefile (Vinod)
 - Add FDMA prefix to REQ_CTRL* (Vinod)
 - Print ret on some error paths (Vinod)
 - Add some acked-by (Peter)

Changes since v3:
 - Remove elf loading code from fdma driver (Vinod)
 - Remove fdma_ prefix for clock names (Arnd)
 - Make _xlate use dma_get_any_channel rather than request_channel (Arnd)
 - Make a common function for _prep_ routines (Vinod)
 - Make driver depend on COMPILE_TEST (Arnd)
 - Remove unnecessary st_fdma_filter_fn (Arnd)
 - Enable FDMA as a module (Arnd)
 - Drop fdma_ clock prefix (Arnd)
 - Fix description as well as example for st, prefix (Arnd)
 - Remove string concatenation from fdma register macros to ease grep'ability (Arnd)
 - Add a XP70 rproc driver for ELF firmware loading and start/stop control (Peter)
 - Add myself as a author of the driver (Peter)

Changes since v2:
 - Change to dma-controller (Arnd)
 - Remove platform data header file and simplifiy code (Arnd)
 - Remove FW_LOADER_USER_HELPER_FALLBACK and rework firmware loading to device config (Vinod)
 - Use SET_RUNTIME_PM_OPS helpers (Vinod)
 - Remove fdma-id dt prop and use compatibles to generate different fdma firmware names (Arnd / Lee)
 - Add sti-asoc-card DT nodes and pinmux config for uniperif player & reader (Peter)
 - Update sti-asoc-card DT binding documentation (Peter)
 - Enable STi audio drivers in multi_v7_defconfig (Peter)

Changes since v1:
 - split into smaller patches for easier / faster review (Vinod)
 - new fill_hw_mode() with common code (Vinod)
 - new config_reqctrl() called from *_prep() instead of device_config cb (Vinod)
 - fdma-xbar support removed (Peter)
 - rework firmware name mechanism so fwname isn't in DT (Peter / Lee)
 - st_fdma_seg_to_mem can be static (Paul)
 - EXPORT_SYMBOL st_fdma_filter_fn not required (Paul)
 - s/channel/channels (vinod)
 - better describe "Must be <3>" (vinod)
 - sizeof(*ehdr) (vinod)
 - print values on error debug (vinod)
 - empty line (Vinod)
 - Update to -EIO (Vinod)
 - Make st_fdma tristate (Paul)
 - Remove __exit tag from .remove (Maxime)
 - Update MAINTAINERS rule to fdma* (Lee)
 - Unit address should match reg property (Lee)

Peter Griffin (11):
  remoteproc: st_slim_rproc: add a slimcore rproc driver
  MAINTAINERS: Add st slim core rproc driver to STi section.
  remoteproc: Update Kconfig setup to 'depends on REMOTEPROC'
  dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding
    documentation
  dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file
  dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support
  MAINTAINERS: Add FDMA driver files to STi section.
  ARM: multi_v7_defconfig: Enable remoteproc core
  ARM: multi_v7_defconfig: Enable st_remoteproc driver.
  ARM: multi_v7_defconfig: Enable STi FDMA driver
  ARM: multi_v7_defconfig: Enable STi and simple-card drivers.

 Documentation/devicetree/bindings/dma/st_fdma.txt |  87 +++
 MAINTAINERS                                       |   3 +
 arch/arm/configs/multi_v7_defconfig               |   6 +
 drivers/dma/Kconfig                               |  13 +
 drivers/dma/Makefile                              |   1 +
 drivers/dma/st_fdma.c                             | 899 ++++++++++++++++++++++
 drivers/dma/st_fdma.h                             | 249 ++++++
 drivers/remoteproc/Kconfig                        |  25 +-
 drivers/remoteproc/Makefile                       |   1 +
 drivers/remoteproc/st_slim_rproc.c                | 364 +++++++++
 include/linux/remoteproc/st_slim_rproc.h          |  58 ++
 11 files changed, 1697 insertions(+), 9 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt
 create mode 100644 drivers/dma/st_fdma.c
 create mode 100644 drivers/dma/st_fdma.h
 create mode 100644 drivers/remoteproc/st_slim_rproc.c
 create mode 100644 include/linux/remoteproc/st_slim_rproc.h

-- 
1.9.1

[toc] | [next] | [standalone]

#1502848 — [PATCH v10 05/11] dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file

This header file will also be used by the dma xbar driver in the
future.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/dma/st_fdma.h | 249 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 249 insertions(+)
 create mode 100644 drivers/dma/st_fdma.h

diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h
new file mode 100644
index 0000000..c58e00d
--- /dev/null
+++ b/drivers/dma/st_fdma.h
@@ -0,0 +1,249 @@
+/*
+ * DMA driver header for STMicroelectronics STi FDMA controller
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ *
+ * Author: Ludovic Barre <Ludovic.barre@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#ifndef __DMA_ST_FDMA_H
+#define __DMA_ST_FDMA_H
+
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/io.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "virt-dma.h"
+
+#define ST_FDMA_NR_DREQS 32
+#define FW_NAME_SIZE 30
+#define DRIVER_NAME "st-fdma"
+
+/**
+ * struct st_fdma_generic_node - Free running/paced generic node
+ *
+ * @length: Length in bytes of a line in a 2D mem to mem
+ * @sstride: Stride, in bytes, between source lines in a 2D data move
+ * @dstride: Stride, in bytes, between destination lines in a 2D data move
+ */
+struct st_fdma_generic_node {
+	u32 length;
+	u32 sstride;
+	u32 dstride;
+};
+
+/**
+ * struct st_fdma_hw_node - Node structure used by fdma hw
+ *
+ * @next: Pointer to next node
+ * @control: Transfer Control Parameters
+ * @nbytes: Number of Bytes to read
+ * @saddr: Source address
+ * @daddr: Destination address
+ *
+ * @generic: generic node for free running/paced transfert type
+ * 2 others transfert type are possible, but not yet implemented
+ *
+ * The NODE structures must be aligned to a 32 byte boundary
+ */
+struct st_fdma_hw_node {
+	u32 next;
+	u32 control;
+	u32 nbytes;
+	u32 saddr;
+	u32 daddr;
+	union {
+		struct st_fdma_generic_node generic;
+	};
+} __aligned(32);
+
+/*
+ * node control parameters
+ */
+#define FDMA_NODE_CTRL_REQ_MAP_MASK	GENMASK(4, 0)
+#define FDMA_NODE_CTRL_REQ_MAP_FREE_RUN	0x0
+#define FDMA_NODE_CTRL_REQ_MAP_DREQ(n)	((n)&FDMA_NODE_CTRL_REQ_MAP_MASK)
+#define FDMA_NODE_CTRL_REQ_MAP_EXT		FDMA_NODE_CTRL_REQ_MAP_MASK
+#define FDMA_NODE_CTRL_SRC_MASK		GENMASK(6, 5)
+#define FDMA_NODE_CTRL_SRC_STATIC	BIT(5)
+#define FDMA_NODE_CTRL_SRC_INCR		BIT(6)
+#define FDMA_NODE_CTRL_DST_MASK		GENMASK(8, 7)
+#define FDMA_NODE_CTRL_DST_STATIC	BIT(7)
+#define FDMA_NODE_CTRL_DST_INCR		BIT(8)
+#define FDMA_NODE_CTRL_SECURE		BIT(15)
+#define FDMA_NODE_CTRL_PAUSE_EON	BIT(30)
+#define FDMA_NODE_CTRL_INT_EON		BIT(31)
+
+/**
+ * struct st_fdma_sw_node - descriptor structure for link list
+ *
+ * @pdesc: Physical address of desc
+ * @node: link used for putting this into a channel queue
+ */
+struct st_fdma_sw_node {
+	dma_addr_t pdesc;
+	struct st_fdma_hw_node *desc;
+};
+
+#define NAME_SZ 10
+
+struct st_fdma_driverdata {
+	u32 id;
+	char name[NAME_SZ];
+};
+
+struct st_fdma_desc {
+	struct virt_dma_desc vdesc;
+	struct st_fdma_chan *fchan;
+	bool iscyclic;
+	unsigned int n_nodes;
+	struct st_fdma_sw_node node[];
+};
+
+enum st_fdma_type {
+	ST_FDMA_TYPE_FREE_RUN,
+	ST_FDMA_TYPE_PACED,
+};
+
+struct st_fdma_cfg {
+	struct device_node *of_node;
+	enum st_fdma_type type;
+	dma_addr_t dev_addr;
+	enum dma_transfer_direction dir;
+	int req_line; /* request line */
+	long req_ctrl; /* Request control */
+};
+
+struct st_fdma_chan {
+	struct st_fdma_dev *fdev;
+	struct dma_pool *node_pool;
+	struct dma_slave_config scfg;
+	struct st_fdma_cfg cfg;
+
+	int dreq_line;
+
+	struct virt_dma_chan vchan;
+	struct st_fdma_desc *fdesc;
+	enum dma_status	status;
+};
+
+struct st_fdma_dev {
+	struct device *dev;
+	const struct st_fdma_driverdata *drvdata;
+	struct dma_device dma_device;
+
+	struct st_slim_rproc *slim_rproc;
+
+	int irq;
+
+	struct st_fdma_chan *chans;
+
+	spinlock_t dreq_lock;
+	unsigned long dreq_mask;
+
+	u32 nr_channels;
+	char fw_name[FW_NAME_SIZE];
+};
+
+/* Peripheral Registers*/
+
+#define FDMA_CMD_STA_OFST	0xFC0
+#define FDMA_CMD_SET_OFST	0xFC4
+#define FDMA_CMD_CLR_OFST	0xFC8
+#define FDMA_CMD_MASK_OFST	0xFCC
+#define FDMA_CMD_START(ch)		(0x1 << (ch << 1))
+#define FDMA_CMD_PAUSE(ch)		(0x2 << (ch << 1))
+#define FDMA_CMD_FLUSH(ch)		(0x3 << (ch << 1))
+
+#define FDMA_INT_STA_OFST	0xFD0
+#define FDMA_INT_STA_CH			0x1
+#define FDMA_INT_STA_ERR		0x2
+
+#define FDMA_INT_SET_OFST	0xFD4
+#define FDMA_INT_CLR_OFST	0xFD8
+#define FDMA_INT_MASK_OFST	0xFDC
+
+#define fdma_read(fdev, name) \
+	readl((fdev)->slim_rproc->peri + name)
+
+#define fdma_write(fdev, val, name) \
+	writel((val), (fdev)->slim_rproc->peri + name)
+
+/* fchan interface (dmem) */
+#define FDMA_CH_CMD_OFST	0x200
+#define FDMA_CH_CMD_STA_MASK		GENMASK(1, 0)
+#define FDMA_CH_CMD_STA_IDLE		(0x0)
+#define FDMA_CH_CMD_STA_START		(0x1)
+#define FDMA_CH_CMD_STA_RUNNING		(0x2)
+#define FDMA_CH_CMD_STA_PAUSED		(0x3)
+#define FDMA_CH_CMD_ERR_MASK		GENMASK(4, 2)
+#define FDMA_CH_CMD_ERR_INT		(0x0 << 2)
+#define FDMA_CH_CMD_ERR_NAND		(0x1 << 2)
+#define FDMA_CH_CMD_ERR_MCHI		(0x2 << 2)
+#define FDMA_CH_CMD_DATA_MASK		GENMASK(31, 5)
+#define fchan_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+#define fchan_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+/* req interface */
+#define FDMA_REQ_CTRL_OFST	0x240
+#define dreq_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ fchan->dreq_line * 0x04 \
+			+ name)
+/* node interface */
+#define FDMA_NODE_SZ 128
+#define FDMA_PTRN_OFST		0x800
+#define FDMA_CNTN_OFST		0x808
+#define FDMA_SADDRN_OFST	0x80c
+#define FDMA_DADDRN_OFST	0x810
+#define fnode_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+#define fnode_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[ST_SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+/*
+ * request control bits
+ */
+#define FDMA_REQ_CTRL_NUM_OPS_MASK	GENMASK(31, 24)
+#define FDMA_REQ_CTRL_NUM_OPS(n)	(FDMA_REQ_CTRL_NUM_OPS_MASK & \
+					((n) << 24))
+#define FDMA_REQ_CTRL_INITIATOR_MASK	BIT(22)
+#define FDMA_REQ_CTRL_INIT0		(0x0 << 22)
+#define FDMA_REQ_CTRL_INIT1		(0x1 << 22)
+#define FDMA_REQ_CTRL_INC_ADDR_ON	BIT(21)
+#define FDMA_REQ_CTRL_DATA_SWAP_ON	BIT(17)
+#define FDMA_REQ_CTRL_WNR		BIT(14)
+#define FDMA_REQ_CTRL_OPCODE_MASK	GENMASK(7, 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST1	(0x0 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST2	(0x1 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST4	(0x2 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST8	(0x3 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST16	(0x4 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST32	(0x5 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST64	(0x6 << 4)
+#define FDMA_REQ_CTRL_HOLDOFF_MASK	GENMASK(2, 0)
+#define FDMA_REQ_CTRL_HOLDOFF(n)	((n) & FDMA_REQ_CTRL_HOLDOFF_MASK)
+
+/* bits used by client to configure request control */
+#define FDMA_REQ_CTRL_CFG_MASK (FDMA_REQ_CTRL_HOLDOFF_MASK | \
+				FDMA_REQ_CTRL_DATA_SWAP_ON | \
+				FDMA_REQ_CTRL_INC_ADDR_ON | \
+				FDMA_REQ_CTRL_INITIATOR_MASK)
+
+#endif	/* __DMA_ST_FDMA_H */
-- 
1.9.1

[toc] | [prev] | [next] | [standalone]

#1503057 — Re: [RESEND PATCH v10 00/11] Add support for FDMA DMA controller and slim core rproc found on STi chipsets

On Tue, Oct 18, 2016 at 10:39:05AM +0100, Peter Griffin wrote:
> Hi Vinod and Bjorn,
> 
> This patchset adds support for the Flexible Direct Memory Access (FDMA) core
> found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU
> with a dedicated firmware. It is a general purpose DMA controller supporting
> 16 independent channels and data can be moved from memory to memory or between
> memory and paced latency critical real time targets.
> 
> [..]
> 
> V10 series updates remoteproc kconfig subsystem to use 'depends on' rather
> than select for the remoteproc core. Remoteproc client drivers now need to
> 'depends on' for the core part.
> 
> This avoids the Kconfig recursive dependency errors and reliance on the DRM
> patch included with the v9 series. Patches are also included for enabling the
> remoteproc core in the multi_v7 defconfig. All patches for DRM subsystem have
> been removed.
> 
> Note there is no longer a depedency with the DRM_VIRTIO_GPU driver in this series,
> only remoteproc and dmaengine subsystems.

That is a better approach and I have applied this now...

-- 
~Vinod

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web