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
slim core is used as a basis for many IPs in the STi
chipsets such as fdma and demux. To avoid duplicating
the elf loading code in each device driver a slim
rproc driver has been created.
This driver is designed to be used by other device drivers
such as fdma, or demux whose IP is based around a slim core.
The device driver can call slim_rproc_alloc() to allocate
a slim rproc and slim_rproc_put() when finished.
This driver takes care of ioremapping the slim
registers (dmem, imem, slimcore, peripherals), whose offsets
and sizes can change between IP's. It also obtains and enables
any clocks used by the device. This approach avoids having
a double mapping of the registers as slim_rproc does not register
its own platform device. It also maps well to device tree
abstraction as it allows us to have one dt node for the whole
device.
All of the generic rproc elf loading code can be reused, and
we provide start() stop() hooks to start and stop the slim
core once the firmware has been loaded. This has been tested
successfully with fdma driver.
Signed-off-by: Peter Griffin <[email protected]>
---
drivers/remoteproc/Kconfig | 7 +-
drivers/remoteproc/Makefile | 1 +
drivers/remoteproc/st_slim_rproc.c | 364 +++++++++++++++++++++++++++++++
include/linux/remoteproc/st_slim_rproc.h | 58 +++++
4 files changed, 428 insertions(+), 2 deletions(-)
create mode 100644 drivers/remoteproc/st_slim_rproc.c
create mode 100644 include/linux/remoteproc/st_slim_rproc.h
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index f396bfe..9270c8e 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -58,7 +58,6 @@ config DA8XX_REMOTEPROC
tristate "DA8xx/OMAP-L13x remoteproc support"
depends on ARCH_DAVINCI_DA8XX
select CMA if MMU
- select REMOTEPROC
select RPMSG_VIRTIO
help
Say y here to support DA8xx/OMAP-L13x remote processors via the
@@ -99,10 +98,10 @@ config QCOM_WCNSS_PIL
tristate "Qualcomm WCNSS Peripheral Image Loader"
depends on OF && ARCH_QCOM
depends on QCOM_SMEM
+ depends on REMOTEPROC
select QCOM_MDT_LOADER
select QCOM_SCM
select QCOM_WCNSS_IRIS
- select REMOTEPROC
help
Say y here to support the Peripheral Image Loader for the Qualcomm
Wireless Connectivity Subsystem.
@@ -116,4 +115,8 @@ config ST_REMOTEPROC
processor framework.
This can be either built-in or a loadable module.
+config ST_SLIM_REMOTEPROC
+ tristate
+ select REMOTEPROC
+
endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 6dfb62e..924f0cb 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_QCOM_Q6V5_PIL) += qcom_q6v5_pil.o
obj-$(CONFIG_QCOM_WCNSS_IRIS) += qcom_wcnss_iris.o
obj-$(CONFIG_QCOM_WCNSS_PIL) += qcom_wcnss.o
obj-$(CONFIG_ST_REMOTEPROC) += st_remoteproc.o
+obj-$(CONFIG_ST_SLIM_REMOTEPROC) += st_slim_rproc.o
diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
new file mode 100644
index 0000000..1484e97
--- /dev/null
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -0,0 +1,364 @@
+/*
+ * SLIM core rproc driver
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ *
+ * Author: Peter Griffin <[email protected]>
+ *
+ * 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "remoteproc_internal.h"
+
+/* SLIM core registers */
+#define SLIM_ID_OFST 0x0
+#define SLIM_VER_OFST 0x4
+
+#define SLIM_EN_OFST 0x8
+#define SLIM_EN_RUN BIT(0)
+
+#define SLIM_CLK_GATE_OFST 0xC
+#define SLIM_CLK_GATE_DIS BIT(0)
+#define SLIM_CLK_GATE_RESET BIT(2)
+
+#define SLIM_SLIM_PC_OFST 0x20
+
+/* DMEM registers */
+#define SLIM_REV_ID_OFST 0x0
+#define SLIM_REV_ID_MIN_MASK GENMASK(15, 8)
+#define SLIM_REV_ID_MIN(id) ((id & SLIM_REV_ID_MIN_MASK) >> 8)
+#define SLIM_REV_ID_MAJ_MASK GENMASK(23, 16)
+#define SLIM_REV_ID_MAJ(id) ((id & SLIM_REV_ID_MAJ_MASK) >> 16)
+
+
+/* peripherals registers */
+#define SLIM_STBUS_SYNC_OFST 0xF88
+#define SLIM_STBUS_SYNC_DIS BIT(0)
+
+#define SLIM_INT_SET_OFST 0xFD4
+#define SLIM_INT_CLR_OFST 0xFD8
+#define SLIM_INT_MASK_OFST 0xFDC
+
+#define SLIM_CMD_CLR_OFST 0xFC8
+#define SLIM_CMD_MASK_OFST 0xFCC
+
+static const char *mem_names[ST_SLIM_MEM_MAX] = {
+ [ST_SLIM_DMEM] = "dmem",
+ [ST_SLIM_IMEM] = "imem",
+};
+
+static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
+{
+ int clk, err;
+
+ for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
+ slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
+ if (IS_ERR(slim_rproc->clks[clk])) {
+ err = PTR_ERR(slim_rproc->clks[clk]);
+ if (err == -EPROBE_DEFER)
+ goto err_put_clks;
+ slim_rproc->clks[clk] = NULL;
+ break;
+ }
+ }
+
+ return 0;
+
+err_put_clks:
+ while (--clk >= 0)
+ clk_put(slim_rproc->clks[clk]);
+
+ return err;
+}
+
+static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
+{
+ int clk;
+
+ for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+ clk_disable_unprepare(slim_rproc->clks[clk]);
+}
+
+static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
+{
+ int clk, ret;
+
+ for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
+ ret = clk_prepare_enable(slim_rproc->clks[clk]);
+ if (ret)
+ goto err_disable_clks;
+ }
+
+ return 0;
+
+err_disable_clks:
+ while (--clk >= 0)
+ clk_disable_unprepare(slim_rproc->clks[clk]);
+
+ return ret;
+}
+
+/*
+ * Remoteproc slim specific device handlers
+ */
+static int slim_rproc_start(struct rproc *rproc)
+{
+ struct device *dev = &rproc->dev;
+ struct st_slim_rproc *slim_rproc = rproc->priv;
+ unsigned long hw_id, hw_ver, fw_rev;
+ u32 val;
+
+ /* disable CPU pipeline clock & reset CPU pipeline */
+ val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
+ writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+ /* disable SLIM core STBus sync */
+ writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
+
+ /* enable cpu pipeline clock */
+ writel(!SLIM_CLK_GATE_DIS,
+ slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+ /* clear int & cmd mailbox */
+ writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
+ writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
+
+ /* enable all channels cmd & int */
+ writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
+ writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+ /* enable cpu */
+ writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+ hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
+ hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
+
+ fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
+ SLIM_REV_ID_OFST);
+
+ dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
+ SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
+ hw_id, hw_ver);
+
+ return 0;
+}
+
+static int slim_rproc_stop(struct rproc *rproc)
+{
+ struct st_slim_rproc *slim_rproc = rproc->priv;
+ u32 val;
+
+ /* mask all (cmd & int) channels */
+ writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
+ writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+ /* disable cpu pipeline clock */
+ writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+ writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+ val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
+ if (val & SLIM_EN_RUN)
+ dev_warn(&rproc->dev, "Failed to disable SLIM");
+
+ dev_dbg(&rproc->dev, "slim stopped\n");
+
+ return 0;
+}
+
+static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+ struct st_slim_rproc *slim_rproc = rproc->priv;
+ void *va = NULL;
+ int i;
+
+ for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
+ if (da != slim_rproc->mem[i].bus_addr)
+ continue;
+
+ if (len <= slim_rproc->mem[i].size) {
+ /* __force to make sparse happy with type conversion */
+ va = (__force void *)slim_rproc->mem[i].cpu_addr;
+ break;
+ }
+ }
+
+ dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
+
+ return va;
+}
+
+static struct rproc_ops slim_rproc_ops = {
+ .start = slim_rproc_start,
+ .stop = slim_rproc_stop,
+ .da_to_va = slim_rproc_da_to_va,
+};
+
+/*
+ * Firmware handler operations: sanity, boot address, load ...
+ */
+
+static struct resource_table empty_rsc_tbl = {
+ .ver = 1,
+ .num = 0,
+};
+
+static struct resource_table *slim_rproc_find_rsc_table(struct rproc *rproc,
+ const struct firmware *fw,
+ int *tablesz)
+{
+ *tablesz = sizeof(empty_rsc_tbl);
+ return &empty_rsc_tbl;
+}
+
+static struct rproc_fw_ops slim_rproc_fw_ops = {
+ .find_rsc_table = slim_rproc_find_rsc_table,
+};
+
+/**
+ * st_slim_rproc_alloc() - allocate and initialise slim rproc
+ * @pdev: Pointer to the platform_device struct
+ * @fw_name: Name of firmware for rproc to use
+ *
+ * Function for allocating and initialising a slim rproc for use by
+ * device drivers whose IP is based around the SLIM core. It
+ * obtains and enables any clocks required by the SLIM core and also
+ * ioremaps the various IO.
+ *
+ * Returns st_slim_rproc pointer or PTR_ERR() on error.
+ */
+
+struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
+ char *fw_name)
+{
+ struct device *dev = &pdev->dev;
+ struct st_slim_rproc *slim_rproc;
+ struct device_node *np = dev->of_node;
+ struct rproc *rproc;
+ struct resource *res;
+ int err, i;
+ const struct rproc_fw_ops *elf_ops;
+
+ if (!fw_name)
+ return ERR_PTR(-EINVAL);
+
+ if (!of_device_is_compatible(np, "st,slim-rproc"))
+ return ERR_PTR(-EINVAL);
+
+ rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
+ fw_name, sizeof(*slim_rproc));
+ if (!rproc)
+ return ERR_PTR(-ENOMEM);
+
+ rproc->has_iommu = false;
+
+ slim_rproc = rproc->priv;
+ slim_rproc->rproc = rproc;
+
+ elf_ops = rproc->fw_ops;
+ /* Use some generic elf ops */
+ slim_rproc_fw_ops.load = elf_ops->load;
+ slim_rproc_fw_ops.sanity_check = elf_ops->sanity_check;
+
+ rproc->fw_ops = &slim_rproc_fw_ops;
+
+ /* get imem and dmem */
+ for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ mem_names[i]);
+
+ slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+ if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
+ dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
+ err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
+ goto err;
+ }
+ slim_rproc->mem[i].bus_addr = res->start;
+ slim_rproc->mem[i].size = resource_size(res);
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
+ slim_rproc->slimcore = devm_ioremap_resource(dev, res);
+ if (IS_ERR(slim_rproc->slimcore)) {
+ dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
+ err = PTR_ERR(slim_rproc->slimcore);
+ goto err;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
+ slim_rproc->peri = devm_ioremap_resource(dev, res);
+ if (IS_ERR(slim_rproc->peri)) {
+ dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
+ err = PTR_ERR(slim_rproc->peri);
+ goto err;
+ }
+
+ err = slim_clk_get(slim_rproc, dev);
+ if (err)
+ goto err;
+
+ err = slim_clk_enable(slim_rproc);
+ if (err) {
+ dev_err(dev, "Failed to enable clocks\n");
+ goto err_clk_put;
+ }
+
+ /* Register as a remoteproc device */
+ err = rproc_add(rproc);
+ if (err) {
+ dev_err(dev, "registration of slim remoteproc failed\n");
+ goto err_clk_dis;
+ }
+
+ return slim_rproc;
+
+err_clk_dis:
+ slim_clk_disable(slim_rproc);
+err_clk_put:
+ for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
+ clk_put(slim_rproc->clks[i]);
+err:
+ rproc_put(rproc);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(st_slim_rproc_alloc);
+
+/**
+ * st_slim_rproc_put() - put slim rproc resources
+ * @slim_rproc: Pointer to the st_slim_rproc struct
+ *
+ * Function for calling respective _put() functions on slim_rproc resources.
+ *
+ */
+void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
+{
+ int clk;
+
+ if (!slim_rproc)
+ return;
+
+ slim_clk_disable(slim_rproc);
+
+ for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+ clk_put(slim_rproc->clks[clk]);
+
+ rproc_del(slim_rproc->rproc);
+ rproc_put(slim_rproc->rproc);
+}
+EXPORT_SYMBOL(st_slim_rproc_put);
+
+MODULE_AUTHOR("Peter Griffin <[email protected]>");
+MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/remoteproc/st_slim_rproc.h b/include/linux/remoteproc/st_slim_rproc.h
new file mode 100644
index 0000000..4155556
--- /dev/null
+++ b/include/linux/remoteproc/st_slim_rproc.h
@@ -0,0 +1,58 @@
+/*
+ * SLIM core rproc driver header
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ *
+ * Author: Peter Griffin <[email protected]>
+ *
+ * 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 _ST_REMOTEPROC_SLIM_H
+#define _ST_REMOTEPROC_SLIM_H
+
+#define ST_SLIM_MEM_MAX 2
+#define ST_SLIM_MAX_CLK 4
+
+enum {
+ ST_SLIM_DMEM,
+ ST_SLIM_IMEM,
+};
+
+/**
+ * struct st_slim_mem - slim internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @size: Size of the memory region
+ */
+struct st_slim_mem {
+ void __iomem *cpu_addr;
+ phys_addr_t bus_addr;
+ size_t size;
+};
+
+/**
+ * struct st_slim_rproc - SLIM slim core
+ * @rproc: rproc handle
+ * @mem: slim memory information
+ * @slimcore: slim slimcore regs
+ * @peri: slim peripheral regs
+ * @clks: slim clocks
+ */
+struct st_slim_rproc {
+ struct rproc *rproc;
+ struct st_slim_mem mem[ST_SLIM_MEM_MAX];
+ void __iomem *slimcore;
+ void __iomem *peri;
+
+ /* st_slim_rproc private */
+ struct clk *clks[ST_SLIM_MAX_CLK];
+};
+
+struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
+ char *fw_name);
+void st_slim_rproc_put(struct st_slim_rproc *slim_rproc);
+
+#endif
--
1.9.1
This header file will also be used by the dma xbar driver in the
future.
Signed-off-by: Ludovic Barre <[email protected]>
Signed-off-by: Peter Griffin <[email protected]>
---
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 <[email protected]>
+ *
+ * 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
This patch adds the DT binding documentation for the FDMA constroller
found on STi based chipsets from STMicroelectronics.
Signed-off-by: Ludovic Barre <[email protected]>
Signed-off-by: Peter Griffin <[email protected]>
Acked-by: Rob Herring <[email protected]>
---
Documentation/devicetree/bindings/dma/st_fdma.txt | 87 +++++++++++++++++++++++
1 file changed, 87 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt
diff --git a/Documentation/devicetree/bindings/dma/st_fdma.txt b/Documentation/devicetree/bindings/dma/st_fdma.txt
new file mode 100644
index 0000000..495d853
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/st_fdma.txt
@@ -0,0 +1,87 @@
+* STMicroelectronics Flexible Direct Memory Access Device Tree bindings
+
+The FDMA is a general-purpose direct memory access controller capable of
+supporting 16 independent DMA channels. It accepts up to 32 DMA requests.
+The FDMA is based on a Slim processor which requires a firmware.
+
+* FDMA Controller
+
+Required properties:
+- compatible : Should be one of
+ - st,stih407-fdma-mpe31-11, "st,slim-rproc";
+ - st,stih407-fdma-mpe31-12, "st,slim-rproc";
+ - st,stih407-fdma-mpe31-13, "st,slim-rproc";
+- reg : Should contain an entry for each name in reg-names
+- reg-names : Must contain "slimcore", "dmem", "peripherals", "imem" entries
+- interrupts : Should contain one interrupt shared by all channels
+- dma-channels : Number of channels supported by the controller
+- #dma-cells : Must be <3>. See DMA client section below
+- clocks : Must contain an entry for each clock
+See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+
+Example:
+
+ fdma0: dma-controller@8e20000 {
+ compatible = "st,stih407-fdma-mpe31-11", "st,slim-rproc";
+ reg = <0x8e20000 0x8000>,
+ <0x8e30000 0x3000>,
+ <0x8e37000 0x1000>,
+ <0x8e38000 0x8000>;
+ reg-names = "slimcore", "dmem", "peripherals", "imem";
+ clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+ <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+ <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+ <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+ interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
+ dma-channels = <16>;
+ #dma-cells = <3>;
+ };
+
+* DMA client
+
+Required properties:
+- dmas: Comma separated list of dma channel requests
+- dma-names: Names of the aforementioned requested channels
+
+Each dmas request consists of 4 cells:
+1. A phandle pointing to the FDMA controller
+2. The request line number
+3. A 32bit mask specifying (see include/linux/platform_data/dma-st-fdma.h)
+ -bit 2-0: Holdoff value, dreq will be masked for
+ 0x0: 0-0.5us
+ 0x1: 0.5-1us
+ 0x2: 1-1.5us
+ -bit 17: data swap
+ 0x0: disabled
+ 0x1: enabled
+ -bit 21: Increment Address
+ 0x0: no address increment between transfers
+ 0x1: increment address between transfers
+ -bit 22: 2 STBus Initiator Coprocessor interface
+ 0x0: high priority port
+ 0x1: low priority port
+4. transfers type
+ 0 free running
+ 1 paced
+
+Example:
+
+ sti_uni_player2: sti-uni-player@2 {
+ compatible = "st,sti-uni-player";
+ status = "disabled";
+ #sound-dai-cells = <0>;
+ st,syscfg = <&syscfg_core>;
+ clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+ assigned-clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+ assigned-clock-parents = <&clk_s_d0_quadfs 2>;
+ assigned-clock-rates = <50000000>;
+ reg = <0x8D82000 0x158>;
+ interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
+ dmas = <&fdma0 4 0 1>;
+ dai-name = "Uni Player #1 (DAC)";
+ dma-names = "tx";
+ st,uniperiph-id = <2>;
+ st,version = <5>;
+ st,mode = "PCM";
+ };
--
1.9.1
Make REMOTEPROC core a selectable kconfig option, and update
remoteproc client drivers to 'depends on' the core. This avoids
some nasty Kconfig recursive dependency issues. Also when using
menuconfig client drivers will be hidden until the core has been
enabled.
Documentation/kbuild/kconfig-language.txt:
Note:
select should be used with care. select will force
a symbol to a value without visiting the dependencies.
By abusing select you are able to select a symbol FOO even
if FOO depends on BAR that is not set.
In general use select only for non-visible symbols
(no prompts anywhere) and for symbols with no dependencies.
That will limit the usefulness but on the other hand avoid
the illegal configurations all over.
Signed-off-by: Peter Griffin <[email protected]>
---
drivers/remoteproc/Kconfig | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 9270c8e..14d5d2d 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -1,20 +1,21 @@
menu "Remoteproc drivers"
-# REMOTEPROC gets selected by whoever wants it
config REMOTEPROC
- tristate
+ tristate "Support for Remote Processor subsystem"
depends on HAS_DMA
select CRC32
select FW_LOADER
select VIRTIO
select VIRTUALIZATION
+if REMOTEPROC
+
config OMAP_REMOTEPROC
tristate "OMAP remoteproc support"
depends on HAS_DMA
depends on ARCH_OMAP4 || SOC_OMAP5
depends on OMAP_IOMMU
- select REMOTEPROC
+ depends on REMOTEPROC
select MAILBOX
select OMAP2PLUS_MBOX
select RPMSG_VIRTIO
@@ -34,7 +35,7 @@ config OMAP_REMOTEPROC
config STE_MODEM_RPROC
tristate "STE-Modem remoteproc support"
depends on HAS_DMA
- select REMOTEPROC
+ depends on REMOTEPROC
default n
help
Say y or m here to support STE-Modem shared memory driver.
@@ -44,7 +45,7 @@ config STE_MODEM_RPROC
config WKUP_M3_RPROC
tristate "AMx3xx Wakeup M3 remoteproc support"
depends on SOC_AM33XX || SOC_AM43XX
- select REMOTEPROC
+ depends on REMOTEPROC
help
Say y here to support Wakeup M3 remote processor on TI AM33xx
and AM43xx family of SoCs.
@@ -57,6 +58,7 @@ config WKUP_M3_RPROC
config DA8XX_REMOTEPROC
tristate "DA8xx/OMAP-L13x remoteproc support"
depends on ARCH_DAVINCI_DA8XX
+ depends on REMOTEPROC
select CMA if MMU
select RPMSG_VIRTIO
help
@@ -83,9 +85,9 @@ config QCOM_Q6V5_PIL
tristate "Qualcomm Hexagon V5 Peripherial Image Loader"
depends on OF && ARCH_QCOM
depends on QCOM_SMEM
+ depends on REMOTEPROC
select MFD_SYSCON
select QCOM_MDT_LOADER
- select REMOTEPROC
help
Say y here to support the Qualcomm Peripherial Image Loader for the
Hexagon V5 based remote processors.
@@ -109,7 +111,7 @@ config QCOM_WCNSS_PIL
config ST_REMOTEPROC
tristate "ST remoteproc support"
depends on ARCH_STI
- select REMOTEPROC
+ depends on REMOTEPROC
help
Say y here to support ST's adjunct processors via the remote
processor framework.
@@ -117,6 +119,8 @@ config ST_REMOTEPROC
config ST_SLIM_REMOTEPROC
tristate
- select REMOTEPROC
+ depends on REMOTEPROC
+
+endif # REMOTEPROC
endmenu
--
1.9.1
This patch adds the slim core rproc driver to the STi section
of the MAINTAINERS file.
Signed-off-by: Peter Griffin <[email protected]>
Acked-by: Lee Jones <[email protected]>
---
MAINTAINERS | 2 ++
1 file changed, 2 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 1cd38a7..78b7f8b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1784,6 +1784,7 @@ F: drivers/phy/phy-stih407-usb.c
F: drivers/phy/phy-stih41x-usb.c
F: drivers/pinctrl/pinctrl-st.c
F: drivers/remoteproc/st_remoteproc.c
+F: drivers/remoteproc/st_slim_rproc.c
F: drivers/reset/sti/
F: drivers/rtc/rtc-st-lpc.c
F: drivers/tty/serial/st-asc.c
@@ -1792,6 +1793,7 @@ F: drivers/usb/host/ehci-st.c
F: drivers/usb/host/ohci-st.c
F: drivers/watchdog/st_lpc_wdt.c
F: drivers/ata/ahci_st.c
+F: include/linux/remoteproc/st_slim_rproc.h
ARM/STM32 ARCHITECTURE
M: Maxime Coquelin <[email protected]>
--
1.9.1
This DMA controller is found on all STi chipsets.
Signed-off-by: Peter Griffin <[email protected]>
Acked-by: Lee Jones <[email protected]>
---
arch/arm/configs/multi_v7_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 0a06af9..ce9ab5a 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -790,6 +790,7 @@ CONFIG_DMA_OMAP=y
CONFIG_QCOM_BAM_DMA=y
CONFIG_XILINX_DMA=y
CONFIG_DMA_SUN6I=y
+CONFIG_ST_FDMA=m
CONFIG_STAGING=y
CONFIG_SENSORS_ISL29018=y
CONFIG_SENSORS_ISL29028=y
--
1.9.1
This patch enables the STi ALSA drivers found on STi platforms
as well as the simple-card driver which is a dependency to have
working sound.
Signed-off-by: Peter Griffin <[email protected]>
Acked-by: Lee Jones <[email protected]>
Cc: [email protected]
Cc: [email protected]
---
arch/arm/configs/multi_v7_defconfig | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index ce9ab5a..a977e57 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -649,6 +649,9 @@ CONFIG_SND_SOC_AK4642=m
CONFIG_SND_SOC_SGTL5000=m
CONFIG_SND_SOC_SPDIF=m
CONFIG_SND_SOC_WM8978=m
+CONFIG_SND_SOC_STI=m
+CONFIG_SND_SOC_STI_SAS=m
+CONFIG_SND_SIMPLE_CARD=m
CONFIG_USB=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_XHCI_MVEBU=y
--
1.9.1
The st231 remote coprocessors are found on all STi chipsets.
Signed-off-by: Peter Griffin <[email protected]>
---
arch/arm/configs/multi_v7_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 538c326..0a06af9 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -824,6 +824,7 @@ CONFIG_ROCKCHIP_IOMMU=y
CONFIG_TEGRA_IOMMU_GART=y
CONFIG_TEGRA_IOMMU_SMMU=y
CONFIG_REMOTEPROC=m
+CONFIG_ST_REMOTEPROC=m
CONFIG_PM_DEVFREQ=y
CONFIG_ARM_TEGRA_DEVFREQ=m
CONFIG_MEMORY=y
--
1.9.1
Now that remoteproc core is selectable it needs to be enabled
in the multi_v7 build.
Signed-off-by: Peter Griffin <[email protected]>
---
arch/arm/configs/multi_v7_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 437d074..538c326 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -823,6 +823,7 @@ CONFIG_HWSPINLOCK_QCOM=y
CONFIG_ROCKCHIP_IOMMU=y
CONFIG_TEGRA_IOMMU_GART=y
CONFIG_TEGRA_IOMMU_SMMU=y
+CONFIG_REMOTEPROC=m
CONFIG_PM_DEVFREQ=y
CONFIG_ARM_TEGRA_DEVFREQ=m
CONFIG_MEMORY=y
--
1.9.1
This patch adds the FDMA driver files to the STi
section of the maintainers file.
Signed-off-by: Peter Griffin <[email protected]>
Acked-by: Lee Jones <[email protected]>
---
MAINTAINERS | 1 +
1 file changed, 1 insertion(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 78b7f8b..e93762d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1774,6 +1774,7 @@ F: drivers/char/hw_random/st-rng.c
F: drivers/clocksource/arm_global_timer.c
F: drivers/clocksource/clksrc_st_lpc.c
F: drivers/cpufreq/sti-cpufreq.c
+F: drivers/dma/st_fdma*
F: drivers/i2c/busses/i2c-st.c
F: drivers/media/rc/st_rc.c
F: drivers/media/platform/sti/c8sectpfe/
--
1.9.1
This patch adds support for the Flexible Direct Memory Access (FDMA) core
driver. The FDMA is a slim core CPU with a dedicated firmware.
It is a general purpose DMA controller capable of supporting 16
independent DMA channels. Data moves maybe from memory to memory
or between memory and paced latency critical real time targets and it
is found on al STi based chipsets.
Signed-off-by: Ludovic Barre <[email protected]>
Signed-off-by: Peter Griffin <[email protected]>
---
drivers/dma/Kconfig | 13 +
drivers/dma/Makefile | 1 +
drivers/dma/st_fdma.c | 899 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 913 insertions(+)
create mode 100644 drivers/dma/st_fdma.c
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index af63a6b..661f217 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -435,6 +435,19 @@ config STE_DMA40
help
Support for ST-Ericsson DMA40 controller
+config ST_FDMA
+ tristate "ST FDMA dmaengine support"
+ depends on ARCH_STI
+ select ST_SLIM_REMOTEPROC
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ Enable support for ST FDMA controller.
+ It supports 16 independent DMA channels, accepts up to 32 DMA requests
+
+ Say Y here if you have such a chipset.
+ If unsure, say N.
+
config STM32_DMA
bool "STMicroelectronics STM32 DMA support"
depends on ARCH_STM32 || COMPILE_TEST
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index e4dc9ca..a4fa336 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_TI_DMA_CROSSBAR) += ti-dma-crossbar.o
obj-$(CONFIG_TI_EDMA) += edma.o
obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
+obj-$(CONFIG_ST_FDMA) += st_fdma.o
obj-y += qcom/
obj-y += xilinx/
diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c
new file mode 100644
index 0000000..515e1d4
--- /dev/null
+++ b/drivers/dma/st_fdma.c
@@ -0,0 +1,899 @@
+/*
+ * DMA driver for STMicroelectronics STi FDMA controller
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ *
+ * Author: Ludovic Barre <[email protected]>
+ * Peter Griffin <[email protected]>
+ *
+ * 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/remoteproc.h>
+
+#include "st_fdma.h"
+
+static inline struct st_fdma_chan *to_st_fdma_chan(struct dma_chan *c)
+{
+ return container_of(c, struct st_fdma_chan, vchan.chan);
+}
+
+static struct st_fdma_desc *to_st_fdma_desc(struct virt_dma_desc *vd)
+{
+ return container_of(vd, struct st_fdma_desc, vdesc);
+}
+
+static int st_fdma_dreq_get(struct st_fdma_chan *fchan)
+{
+ struct st_fdma_dev *fdev = fchan->fdev;
+ u32 req_line_cfg = fchan->cfg.req_line;
+ u32 dreq_line;
+ int try = 0;
+
+ /*
+ * dreq_mask is shared for n channels of fdma, so all accesses must be
+ * atomic. if the dreq_mask is changed between ffz and set_bit,
+ * we retry
+ */
+ do {
+ if (fdev->dreq_mask == ~0L) {
+ dev_err(fdev->dev, "No req lines available\n");
+ return -EINVAL;
+ }
+
+ if (try || req_line_cfg >= ST_FDMA_NR_DREQS) {
+ dev_err(fdev->dev, "Invalid or used req line\n");
+ return -EINVAL;
+ } else {
+ dreq_line = req_line_cfg;
+ }
+
+ try++;
+ } while (test_and_set_bit(dreq_line, &fdev->dreq_mask));
+
+ dev_dbg(fdev->dev, "get dreq_line:%d mask:%#lx\n",
+ dreq_line, fdev->dreq_mask);
+
+ return dreq_line;
+}
+
+static void st_fdma_dreq_put(struct st_fdma_chan *fchan)
+{
+ struct st_fdma_dev *fdev = fchan->fdev;
+
+ dev_dbg(fdev->dev, "put dreq_line:%#x\n", fchan->dreq_line);
+ clear_bit(fchan->dreq_line, &fdev->dreq_mask);
+}
+
+static void st_fdma_xfer_desc(struct st_fdma_chan *fchan)
+{
+ struct virt_dma_desc *vdesc;
+ unsigned long nbytes, ch_cmd, cmd;
+
+ vdesc = vchan_next_desc(&fchan->vchan);
+ if (!vdesc)
+ return;
+
+ fchan->fdesc = to_st_fdma_desc(vdesc);
+ nbytes = fchan->fdesc->node[0].desc->nbytes;
+ cmd = FDMA_CMD_START(fchan->vchan.chan.chan_id);
+ ch_cmd = fchan->fdesc->node[0].pdesc | FDMA_CH_CMD_STA_START;
+
+ /* start the channel for the descriptor */
+ fnode_write(fchan, nbytes, FDMA_CNTN_OFST);
+ fchan_write(fchan, ch_cmd, FDMA_CH_CMD_OFST);
+ writel(cmd,
+ fchan->fdev->slim_rproc->peri + FDMA_CMD_SET_OFST);
+
+ dev_dbg(fchan->fdev->dev, "start chan:%d\n", fchan->vchan.chan.chan_id);
+}
+
+static void st_fdma_ch_sta_update(struct st_fdma_chan *fchan,
+ unsigned long int_sta)
+{
+ unsigned long ch_sta, ch_err;
+ int ch_id = fchan->vchan.chan.chan_id;
+ struct st_fdma_dev *fdev = fchan->fdev;
+
+ ch_sta = fchan_read(fchan, FDMA_CH_CMD_OFST);
+ ch_err = ch_sta & FDMA_CH_CMD_ERR_MASK;
+ ch_sta &= FDMA_CH_CMD_STA_MASK;
+
+ if (int_sta & FDMA_INT_STA_ERR) {
+ dev_warn(fdev->dev, "chan:%d, error:%ld\n", ch_id, ch_err);
+ fchan->status = DMA_ERROR;
+ return;
+ }
+
+ switch (ch_sta) {
+ case FDMA_CH_CMD_STA_PAUSED:
+ fchan->status = DMA_PAUSED;
+ break;
+
+ case FDMA_CH_CMD_STA_RUNNING:
+ fchan->status = DMA_IN_PROGRESS;
+ break;
+ }
+}
+
+static irqreturn_t st_fdma_irq_handler(int irq, void *dev_id)
+{
+ struct st_fdma_dev *fdev = dev_id;
+ irqreturn_t ret = IRQ_NONE;
+ struct st_fdma_chan *fchan = &fdev->chans[0];
+ unsigned long int_sta, clr;
+
+ int_sta = fdma_read(fdev, FDMA_INT_STA_OFST);
+ clr = int_sta;
+
+ for (; int_sta != 0 ; int_sta >>= 2, fchan++) {
+ if (!(int_sta & (FDMA_INT_STA_CH | FDMA_INT_STA_ERR)))
+ continue;
+
+ spin_lock(&fchan->vchan.lock);
+ st_fdma_ch_sta_update(fchan, int_sta);
+
+ if (fchan->fdesc) {
+ if (!fchan->fdesc->iscyclic) {
+ list_del(&fchan->fdesc->vdesc.node);
+ vchan_cookie_complete(&fchan->fdesc->vdesc);
+ fchan->fdesc = NULL;
+ fchan->status = DMA_COMPLETE;
+ } else {
+ vchan_cyclic_callback(&fchan->fdesc->vdesc);
+ }
+
+ /* Start the next descriptor (if available) */
+ if (!fchan->fdesc)
+ st_fdma_xfer_desc(fchan);
+ }
+
+ spin_unlock(&fchan->vchan.lock);
+ ret = IRQ_HANDLED;
+ }
+
+ fdma_write(fdev, clr, FDMA_INT_CLR_OFST);
+
+ return ret;
+}
+
+static struct dma_chan *st_fdma_of_xlate(struct of_phandle_args *dma_spec,
+ struct of_dma *ofdma)
+{
+ struct st_fdma_dev *fdev = ofdma->of_dma_data;
+ struct dma_chan *chan;
+ struct st_fdma_chan *fchan;
+ int ret;
+
+ if (dma_spec->args_count < 1)
+ return ERR_PTR(-EINVAL);
+
+ if (fdev->dma_device.dev->of_node != dma_spec->np)
+ return ERR_PTR(-EINVAL);
+
+ ret = rproc_boot(fdev->slim_rproc->rproc);
+ if (ret == -ENOENT)
+ return ERR_PTR(-EPROBE_DEFER);
+ else if (ret)
+ return ERR_PTR(ret);
+
+ chan = dma_get_any_slave_channel(&fdev->dma_device);
+ if (!chan)
+ goto err_chan;
+
+ fchan = to_st_fdma_chan(chan);
+
+ fchan->cfg.of_node = dma_spec->np;
+ fchan->cfg.req_line = dma_spec->args[0];
+ fchan->cfg.req_ctrl = 0;
+ fchan->cfg.type = ST_FDMA_TYPE_FREE_RUN;
+
+ if (dma_spec->args_count > 1)
+ fchan->cfg.req_ctrl = dma_spec->args[1]
+ & FDMA_REQ_CTRL_CFG_MASK;
+
+ if (dma_spec->args_count > 2)
+ fchan->cfg.type = dma_spec->args[2];
+
+ if (fchan->cfg.type == ST_FDMA_TYPE_FREE_RUN) {
+ fchan->dreq_line = 0;
+ } else {
+ fchan->dreq_line = st_fdma_dreq_get(fchan);
+ if (IS_ERR_VALUE(fchan->dreq_line)) {
+ chan = ERR_PTR(fchan->dreq_line);
+ goto err_chan;
+ }
+ }
+
+ dev_dbg(fdev->dev, "xlate req_line:%d type:%d req_ctrl:%#lx\n",
+ fchan->cfg.req_line, fchan->cfg.type, fchan->cfg.req_ctrl);
+
+ return chan;
+
+err_chan:
+ rproc_shutdown(fdev->slim_rproc->rproc);
+ return chan;
+
+}
+
+static void st_fdma_free_desc(struct virt_dma_desc *vdesc)
+{
+ struct st_fdma_desc *fdesc;
+ int i;
+
+ fdesc = to_st_fdma_desc(vdesc);
+ for (i = 0; i < fdesc->n_nodes; i++)
+ dma_pool_free(fdesc->fchan->node_pool, fdesc->node[i].desc,
+ fdesc->node[i].pdesc);
+ kfree(fdesc);
+}
+
+static struct st_fdma_desc *st_fdma_alloc_desc(struct st_fdma_chan *fchan,
+ int sg_len)
+{
+ struct st_fdma_desc *fdesc;
+ int i;
+
+ fdesc = kzalloc(sizeof(*fdesc) +
+ sizeof(struct st_fdma_sw_node) * sg_len, GFP_NOWAIT);
+ if (!fdesc)
+ return NULL;
+
+ fdesc->fchan = fchan;
+ fdesc->n_nodes = sg_len;
+ for (i = 0; i < sg_len; i++) {
+ fdesc->node[i].desc = dma_pool_alloc(fchan->node_pool,
+ GFP_NOWAIT, &fdesc->node[i].pdesc);
+ if (!fdesc->node[i].desc)
+ goto err;
+ }
+ return fdesc;
+
+err:
+ while (--i >= 0)
+ dma_pool_free(fchan->node_pool, fdesc->node[i].desc,
+ fdesc->node[i].pdesc);
+ kfree(fdesc);
+ return NULL;
+}
+
+static int st_fdma_alloc_chan_res(struct dma_chan *chan)
+{
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+ /* Create the dma pool for descriptor allocation */
+ fchan->node_pool = dma_pool_create(dev_name(&chan->dev->device),
+ fchan->fdev->dev,
+ sizeof(struct st_fdma_hw_node),
+ __alignof__(struct st_fdma_hw_node),
+ 0);
+
+ if (!fchan->node_pool) {
+ dev_err(fchan->fdev->dev, "unable to allocate desc pool\n");
+ return -ENOMEM;
+ }
+
+ dev_dbg(fchan->fdev->dev, "alloc ch_id:%d type:%d\n",
+ fchan->vchan.chan.chan_id, fchan->cfg.type);
+
+ return 0;
+}
+
+static void st_fdma_free_chan_res(struct dma_chan *chan)
+{
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ struct rproc *rproc = fchan->fdev->slim_rproc->rproc;
+ unsigned long flags;
+
+ LIST_HEAD(head);
+
+ dev_dbg(fchan->fdev->dev, "%s: freeing chan:%d\n",
+ __func__, fchan->vchan.chan.chan_id);
+
+ if (fchan->cfg.type != ST_FDMA_TYPE_FREE_RUN)
+ st_fdma_dreq_put(fchan);
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+ fchan->fdesc = NULL;
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+ dma_pool_destroy(fchan->node_pool);
+ fchan->node_pool = NULL;
+ memset(&fchan->cfg, 0, sizeof(struct st_fdma_cfg));
+
+ rproc_shutdown(rproc);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_memcpy(
+ struct dma_chan *chan, dma_addr_t dst, dma_addr_t src,
+ size_t len, unsigned long flags)
+{
+ struct st_fdma_chan *fchan;
+ struct st_fdma_desc *fdesc;
+ struct st_fdma_hw_node *hw_node;
+
+ if (!len)
+ return NULL;
+
+ fchan = to_st_fdma_chan(chan);
+
+ /* We only require a single descriptor */
+ fdesc = st_fdma_alloc_desc(fchan, 1);
+ if (!fdesc) {
+ dev_err(fchan->fdev->dev, "no memory for desc\n");
+ return NULL;
+ }
+
+ hw_node = fdesc->node[0].desc;
+ hw_node->next = 0;
+ hw_node->control = FDMA_NODE_CTRL_REQ_MAP_FREE_RUN;
+ hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+ hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+ hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+ hw_node->nbytes = len;
+ hw_node->saddr = src;
+ hw_node->daddr = dst;
+ hw_node->generic.length = len;
+ hw_node->generic.sstride = 0;
+ hw_node->generic.dstride = 0;
+
+ return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static int config_reqctrl(struct st_fdma_chan *fchan,
+ enum dma_transfer_direction direction)
+{
+ u32 maxburst = 0, addr = 0;
+ enum dma_slave_buswidth width;
+ int ch_id = fchan->vchan.chan.chan_id;
+ struct st_fdma_dev *fdev = fchan->fdev;
+
+ switch (direction) {
+
+ case DMA_DEV_TO_MEM:
+ fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_WNR;
+ maxburst = fchan->scfg.src_maxburst;
+ width = fchan->scfg.src_addr_width;
+ addr = fchan->scfg.src_addr;
+ break;
+
+ case DMA_MEM_TO_DEV:
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_WNR;
+ maxburst = fchan->scfg.dst_maxburst;
+ width = fchan->scfg.dst_addr_width;
+ addr = fchan->scfg.dst_addr;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_OPCODE_MASK;
+
+ switch (width) {
+
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST1;
+ break;
+
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST2;
+ break;
+
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST4;
+ break;
+
+ case DMA_SLAVE_BUSWIDTH_8_BYTES:
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST8;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_NUM_OPS_MASK;
+ fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_NUM_OPS(maxburst-1);
+ dreq_write(fchan, fchan->cfg.req_ctrl, FDMA_REQ_CTRL_OFST);
+
+ fchan->cfg.dev_addr = addr;
+ fchan->cfg.dir = direction;
+
+ dev_dbg(fdev->dev, "chan:%d config_reqctrl:%#x req_ctrl:%#lx\n",
+ ch_id, addr, fchan->cfg.req_ctrl);
+
+ return 0;
+}
+
+static void fill_hw_node(struct st_fdma_hw_node *hw_node,
+ struct st_fdma_chan *fchan,
+ enum dma_transfer_direction direction)
+{
+ if (direction == DMA_MEM_TO_DEV) {
+ hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+ hw_node->control |= FDMA_NODE_CTRL_DST_STATIC;
+ hw_node->daddr = fchan->cfg.dev_addr;
+ } else {
+ hw_node->control |= FDMA_NODE_CTRL_SRC_STATIC;
+ hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+ hw_node->saddr = fchan->cfg.dev_addr;
+ }
+
+ hw_node->generic.sstride = 0;
+ hw_node->generic.dstride = 0;
+}
+
+static inline struct st_fdma_chan *st_fdma_prep_common(struct dma_chan *chan,
+ size_t len, enum dma_transfer_direction direction)
+{
+ struct st_fdma_chan *fchan;
+
+ if (!chan || !len)
+ return NULL;
+
+ fchan = to_st_fdma_chan(chan);
+
+ if (!is_slave_direction(direction)) {
+ dev_err(fchan->fdev->dev, "bad direction?\n");
+ return NULL;
+ }
+
+ return fchan;
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_cyclic(
+ struct dma_chan *chan, dma_addr_t buf_addr, size_t len,
+ size_t period_len, enum dma_transfer_direction direction,
+ unsigned long flags)
+{
+ struct st_fdma_chan *fchan;
+ struct st_fdma_desc *fdesc;
+ int sg_len, i;
+
+ fchan = st_fdma_prep_common(chan, len, direction);
+ if (!fchan)
+ return NULL;
+
+ if (!period_len)
+ return NULL;
+
+ if (config_reqctrl(fchan, direction)) {
+ dev_err(fchan->fdev->dev, "bad width or direction\n");
+ return NULL;
+ }
+
+ /* the buffer length must be a multiple of period_len */
+ if (len % period_len != 0) {
+ dev_err(fchan->fdev->dev, "len is not multiple of period\n");
+ return NULL;
+ }
+
+ sg_len = len / period_len;
+ fdesc = st_fdma_alloc_desc(fchan, sg_len);
+ if (!fdesc) {
+ dev_err(fchan->fdev->dev, "no memory for desc\n");
+ return NULL;
+ }
+
+ fdesc->iscyclic = true;
+
+ for (i = 0; i < sg_len; i++) {
+ struct st_fdma_hw_node *hw_node = fdesc->node[i].desc;
+
+ hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+
+ hw_node->control =
+ FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+ hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+ fill_hw_node(hw_node, fchan, direction);
+
+ if (direction == DMA_MEM_TO_DEV)
+ hw_node->saddr = buf_addr + (i * period_len);
+ else
+ hw_node->daddr = buf_addr + (i * period_len);
+
+ hw_node->nbytes = period_len;
+ hw_node->generic.length = period_len;
+ }
+
+ return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_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 st_fdma_chan *fchan;
+ struct st_fdma_desc *fdesc;
+ struct st_fdma_hw_node *hw_node;
+ struct scatterlist *sg;
+ int i;
+
+ fchan = st_fdma_prep_common(chan, sg_len, direction);
+ if (!fchan)
+ return NULL;
+
+ if (!sgl)
+ return NULL;
+
+ fdesc = st_fdma_alloc_desc(fchan, sg_len);
+ if (!fdesc) {
+ dev_err(fchan->fdev->dev, "no memory for desc\n");
+ return NULL;
+ }
+
+ fdesc->iscyclic = false;
+
+ for_each_sg(sgl, sg, sg_len, i) {
+ hw_node = fdesc->node[i].desc;
+
+ hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+ hw_node->control = FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+
+ fill_hw_node(hw_node, fchan, direction);
+
+ if (direction == DMA_MEM_TO_DEV)
+ hw_node->saddr = sg_dma_address(sg);
+ else
+ hw_node->daddr = sg_dma_address(sg);
+
+ hw_node->nbytes = sg_dma_len(sg);
+ hw_node->generic.length = sg_dma_len(sg);
+ }
+
+ /* interrupt at end of last node */
+ hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+ return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static size_t st_fdma_desc_residue(struct st_fdma_chan *fchan,
+ struct virt_dma_desc *vdesc,
+ bool in_progress)
+{
+ struct st_fdma_desc *fdesc = fchan->fdesc;
+ size_t residue = 0;
+ dma_addr_t cur_addr = 0;
+ int i;
+
+ if (in_progress) {
+ cur_addr = fchan_read(fchan, FDMA_CH_CMD_OFST);
+ cur_addr &= FDMA_CH_CMD_DATA_MASK;
+ }
+
+ for (i = fchan->fdesc->n_nodes - 1 ; i >= 0; i--) {
+ if (cur_addr == fdesc->node[i].pdesc) {
+ residue += fnode_read(fchan, FDMA_CNTN_OFST);
+ break;
+ }
+ residue += fdesc->node[i].desc->nbytes;
+ }
+
+ return residue;
+}
+
+static enum dma_status st_fdma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ struct virt_dma_desc *vd;
+ enum dma_status ret;
+ unsigned long flags;
+
+ ret = dma_cookie_status(chan, cookie, txstate);
+ if (ret == DMA_COMPLETE || !txstate)
+ return ret;
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+ vd = vchan_find_desc(&fchan->vchan, cookie);
+ if (fchan->fdesc && cookie == fchan->fdesc->vdesc.tx.cookie)
+ txstate->residue = st_fdma_desc_residue(fchan, vd, true);
+ else if (vd)
+ txstate->residue = st_fdma_desc_residue(fchan, vd, false);
+ else
+ txstate->residue = 0;
+
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+ return ret;
+}
+
+static void st_fdma_issue_pending(struct dma_chan *chan)
+{
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+
+ if (vchan_issue_pending(&fchan->vchan) && !fchan->fdesc)
+ st_fdma_xfer_desc(fchan);
+
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+}
+
+static int st_fdma_pause(struct dma_chan *chan)
+{
+ unsigned long flags;
+ LIST_HEAD(head);
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ int ch_id = fchan->vchan.chan.chan_id;
+ unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+ dev_dbg(fchan->fdev->dev, "pause chan:%d\n", ch_id);
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+ if (fchan->fdesc)
+ fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+ return 0;
+}
+
+static int st_fdma_resume(struct dma_chan *chan)
+{
+ unsigned long flags;
+ unsigned long val;
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ int ch_id = fchan->vchan.chan.chan_id;
+
+ dev_dbg(fchan->fdev->dev, "resume chan:%d\n", ch_id);
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+ if (fchan->fdesc) {
+ val = fchan_read(fchan, FDMA_CH_CMD_OFST);
+ val &= FDMA_CH_CMD_DATA_MASK;
+ fchan_write(fchan, val, FDMA_CH_CMD_OFST);
+ }
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+ return 0;
+}
+
+static int st_fdma_terminate_all(struct dma_chan *chan)
+{
+ unsigned long flags;
+ LIST_HEAD(head);
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+ int ch_id = fchan->vchan.chan.chan_id;
+ unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+ dev_dbg(fchan->fdev->dev, "terminate chan:%d\n", ch_id);
+
+ spin_lock_irqsave(&fchan->vchan.lock, flags);
+ fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+ fchan->fdesc = NULL;
+ vchan_get_all_descriptors(&fchan->vchan, &head);
+ spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+ vchan_dma_desc_free_list(&fchan->vchan, &head);
+
+ return 0;
+}
+
+static int st_fdma_slave_config(struct dma_chan *chan,
+ struct dma_slave_config *slave_cfg)
+{
+ struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+ memcpy(&fchan->scfg, slave_cfg, sizeof(fchan->scfg));
+ return 0;
+}
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_11 = {
+ .name = "STiH407",
+ .id = 0,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_12 = {
+ .name = "STiH407",
+ .id = 1,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_13 = {
+ .name = "STiH407",
+ .id = 2,
+};
+
+static const struct of_device_id st_fdma_match[] = {
+ { .compatible = "st,stih407-fdma-mpe31-11"
+ , .data = &fdma_mpe31_stih407_11 },
+ { .compatible = "st,stih407-fdma-mpe31-12"
+ , .data = &fdma_mpe31_stih407_12 },
+ { .compatible = "st,stih407-fdma-mpe31-13"
+ , .data = &fdma_mpe31_stih407_13 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_fdma_match);
+
+static int st_fdma_parse_dt(struct platform_device *pdev,
+ const struct st_fdma_driverdata *drvdata,
+ struct st_fdma_dev *fdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ if (!np)
+ goto err;
+
+ ret = of_property_read_u32(np, "dma-channels", &fdev->nr_channels);
+ if (ret)
+ goto err;
+
+ snprintf(fdev->fw_name, FW_NAME_SIZE, "fdma_%s_%d.elf",
+ drvdata->name, drvdata->id);
+
+err:
+ return ret;
+}
+#define FDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
+
+static void st_fdma_free(struct st_fdma_dev *fdev)
+{
+ struct st_fdma_chan *fchan;
+ int i;
+
+ for (i = 0; i < fdev->nr_channels; i++) {
+ fchan = &fdev->chans[i];
+ list_del(&fchan->vchan.chan.device_node);
+ tasklet_kill(&fchan->vchan.task);
+ }
+}
+
+static int st_fdma_probe(struct platform_device *pdev)
+{
+ struct st_fdma_dev *fdev;
+ const struct of_device_id *match;
+ struct device_node *np = pdev->dev.of_node;
+ const struct st_fdma_driverdata *drvdata;
+ int ret, i;
+
+ match = of_match_device((st_fdma_match), &pdev->dev);
+ if (!match || !match->data) {
+ dev_err(&pdev->dev, "No device match found\n");
+ return -ENODEV;
+ }
+
+ drvdata = match->data;
+
+ fdev = devm_kzalloc(&pdev->dev, sizeof(*fdev), GFP_KERNEL);
+ if (!fdev)
+ return -ENOMEM;
+
+ ret = st_fdma_parse_dt(pdev, drvdata, fdev);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to find platform data\n");
+ goto err;
+ }
+
+ fdev->chans = devm_kcalloc(&pdev->dev, fdev->nr_channels,
+ sizeof(struct st_fdma_chan), GFP_KERNEL);
+ if (!fdev->chans)
+ return -ENOMEM;
+
+ fdev->dev = &pdev->dev;
+ fdev->drvdata = drvdata;
+ platform_set_drvdata(pdev, fdev);
+
+ fdev->irq = platform_get_irq(pdev, 0);
+ if (fdev->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get irq resource\n");
+ return -EINVAL;
+ }
+
+ ret = devm_request_irq(&pdev->dev, fdev->irq, st_fdma_irq_handler, 0,
+ dev_name(&pdev->dev), fdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq (%d)\n", ret);
+ goto err;
+ }
+
+ fdev->slim_rproc = st_slim_rproc_alloc(pdev, fdev->fw_name);
+ if (!fdev->slim_rproc) {
+ ret = PTR_ERR(fdev->slim_rproc);
+ dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n", ret);
+ goto err;
+ }
+
+ /* Initialise list of FDMA channels */
+ INIT_LIST_HEAD(&fdev->dma_device.channels);
+ for (i = 0; i < fdev->nr_channels; i++) {
+ struct st_fdma_chan *fchan = &fdev->chans[i];
+
+ fchan->fdev = fdev;
+ fchan->vchan.desc_free = st_fdma_free_desc;
+ vchan_init(&fchan->vchan, &fdev->dma_device);
+ }
+
+ /* Initialise the FDMA dreq (reserve 0 & 31 for FDMA use) */
+ fdev->dreq_mask = BIT(0) | BIT(31);
+
+ dma_cap_set(DMA_SLAVE, fdev->dma_device.cap_mask);
+ dma_cap_set(DMA_CYCLIC, fdev->dma_device.cap_mask);
+ dma_cap_set(DMA_MEMCPY, fdev->dma_device.cap_mask);
+
+ fdev->dma_device.dev = &pdev->dev;
+ fdev->dma_device.device_alloc_chan_resources = st_fdma_alloc_chan_res;
+ fdev->dma_device.device_free_chan_resources = st_fdma_free_chan_res;
+ fdev->dma_device.device_prep_dma_cyclic = st_fdma_prep_dma_cyclic;
+ fdev->dma_device.device_prep_slave_sg = st_fdma_prep_slave_sg;
+ fdev->dma_device.device_prep_dma_memcpy = st_fdma_prep_dma_memcpy;
+ fdev->dma_device.device_tx_status = st_fdma_tx_status;
+ fdev->dma_device.device_issue_pending = st_fdma_issue_pending;
+ fdev->dma_device.device_terminate_all = st_fdma_terminate_all;
+ fdev->dma_device.device_config = st_fdma_slave_config;
+ fdev->dma_device.device_pause = st_fdma_pause;
+ fdev->dma_device.device_resume = st_fdma_resume;
+
+ fdev->dma_device.src_addr_widths = FDMA_DMA_BUSWIDTHS;
+ fdev->dma_device.dst_addr_widths = FDMA_DMA_BUSWIDTHS;
+ fdev->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+ fdev->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
+ ret = dma_async_device_register(&fdev->dma_device);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to register DMA device (%d)\n", ret);
+ goto err_rproc;
+ }
+
+ ret = of_dma_controller_register(np, st_fdma_of_xlate, fdev);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to register controller (%d)\n", ret);
+ goto err_dma_dev;
+ }
+
+ dev_info(&pdev->dev, "ST FDMA engine driver, irq:%d\n", fdev->irq);
+
+ return 0;
+
+err_dma_dev:
+ dma_async_device_unregister(&fdev->dma_device);
+err_rproc:
+ st_fdma_free(fdev);
+ st_slim_rproc_put(fdev->slim_rproc);
+err:
+ return ret;
+}
+
+static int st_fdma_remove(struct platform_device *pdev)
+{
+ struct st_fdma_dev *fdev = platform_get_drvdata(pdev);
+
+ devm_free_irq(&pdev->dev, fdev->irq, fdev);
+ st_slim_rproc_put(fdev->slim_rproc);
+ of_dma_controller_free(pdev->dev.of_node);
+ dma_async_device_unregister(&fdev->dma_device);
+
+ return 0;
+}
+
+static struct platform_driver st_fdma_platform_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = st_fdma_match,
+ },
+ .probe = st_fdma_probe,
+ .remove = st_fdma_remove,
+};
+module_platform_driver(st_fdma_platform_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMicroelectronics FDMA engine driver");
+MODULE_AUTHOR("Ludovic.barre <[email protected]>");
+MODULE_AUTHOR("Peter Griffin <[email protected]>");
+MODULE_ALIAS("platform: " DRIVER_NAME);
--
1.9.1
On Tue, Oct 18, 2016 at 10:39:16AM +0100, Peter Griffin wrote:
> This patch enables the STi ALSA drivers found on STi platforms
> as well as the simple-card driver which is a dependency to have
> working sound.
>
> Signed-off-by: Peter Griffin <[email protected]>
> Acked-by: Lee Jones <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
There's no need to keep CCing me on all these resends.
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
On Tue 18 Oct 02:39 PDT 2016, Peter Griffin wrote:
> slim core is used as a basis for many IPs in the STi
> chipsets such as fdma and demux. To avoid duplicating
> the elf loading code in each device driver a slim
> rproc driver has been created.
>
> This driver is designed to be used by other device drivers
> such as fdma, or demux whose IP is based around a slim core.
> The device driver can call slim_rproc_alloc() to allocate
> a slim rproc and slim_rproc_put() when finished.
>
> This driver takes care of ioremapping the slim
> registers (dmem, imem, slimcore, peripherals), whose offsets
> and sizes can change between IP's. It also obtains and enables
> any clocks used by the device. This approach avoids having
> a double mapping of the registers as slim_rproc does not register
> its own platform device. It also maps well to device tree
> abstraction as it allows us to have one dt node for the whole
> device.
>
> All of the generic rproc elf loading code can be reused, and
> we provide start() stop() hooks to start and stop the slim
> core once the firmware has been loaded. This has been tested
> successfully with fdma driver.
>
> Signed-off-by: Peter Griffin <[email protected]>
> ---
> drivers/remoteproc/Kconfig | 7 +-
> drivers/remoteproc/Makefile | 1 +
> drivers/remoteproc/st_slim_rproc.c | 364 +++++++++++++++++++++++++++++++
> include/linux/remoteproc/st_slim_rproc.h | 58 +++++
> 4 files changed, 428 insertions(+), 2 deletions(-)
> create mode 100644 drivers/remoteproc/st_slim_rproc.c
> create mode 100644 include/linux/remoteproc/st_slim_rproc.h
>
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index f396bfe..9270c8e 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -58,7 +58,6 @@ config DA8XX_REMOTEPROC
> tristate "DA8xx/OMAP-L13x remoteproc support"
> depends on ARCH_DAVINCI_DA8XX
> select CMA if MMU
> - select REMOTEPROC
No, this is an unrelated change to this patch.
> select RPMSG_VIRTIO
> help
> Say y here to support DA8xx/OMAP-L13x remote processors via the
> @@ -99,10 +98,10 @@ config QCOM_WCNSS_PIL
> tristate "Qualcomm WCNSS Peripheral Image Loader"
> depends on OF && ARCH_QCOM
> depends on QCOM_SMEM
> + depends on REMOTEPROC
> select QCOM_MDT_LOADER
> select QCOM_SCM
> select QCOM_WCNSS_IRIS
> - select REMOTEPROC
Dito.
As you now make changes to the entire remoteproc Kconfig file, rather
than simply add a Kconfig symbol we can't bring this in via Vinod's tree
without providing Linus with a messy merge conflict.
So the remoteproc parts now has to go through my tree.
> help
> Say y here to support the Peripheral Image Loader for the Qualcomm
> Wireless Connectivity Subsystem.
> @@ -116,4 +115,8 @@ config ST_REMOTEPROC
> processor framework.
> This can be either built-in or a loadable module.
>
> +config ST_SLIM_REMOTEPROC
> + tristate
> + select REMOTEPROC
> +
> endmenu
[..]
> diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
[..]
> +struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
> + char *fw_name)
> +{
[..]
> + rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
> + fw_name, sizeof(*slim_rproc));
[..]
> + rproc_put(rproc);
As of v4.9 you need to rproc_free() rather than rproc_put() to undo
rproc_alloc().
Regards,
Bjorn
Hi Bjorn,
On Thu, 03 Nov 2016, Bjorn Andersson wrote:
> On Tue 18 Oct 02:39 PDT 2016, Peter Griffin wrote:
>
> > slim core is used as a basis for many IPs in the STi
> > chipsets such as fdma and demux. To avoid duplicating
> > the elf loading code in each device driver a slim
> > rproc driver has been created.
> >
> > This driver is designed to be used by other device drivers
> > such as fdma, or demux whose IP is based around a slim core.
> > The device driver can call slim_rproc_alloc() to allocate
> > a slim rproc and slim_rproc_put() when finished.
> >
> > This driver takes care of ioremapping the slim
> > registers (dmem, imem, slimcore, peripherals), whose offsets
> > and sizes can change between IP's. It also obtains and enables
> > any clocks used by the device. This approach avoids having
> > a double mapping of the registers as slim_rproc does not register
> > its own platform device. It also maps well to device tree
> > abstraction as it allows us to have one dt node for the whole
> > device.
> >
> > All of the generic rproc elf loading code can be reused, and
> > we provide start() stop() hooks to start and stop the slim
> > core once the firmware has been loaded. This has been tested
> > successfully with fdma driver.
> >
> > Signed-off-by: Peter Griffin <[email protected]>
> > ---
> > drivers/remoteproc/Kconfig | 7 +-
> > drivers/remoteproc/Makefile | 1 +
> > drivers/remoteproc/st_slim_rproc.c | 364 +++++++++++++++++++++++++++++++
> > include/linux/remoteproc/st_slim_rproc.h | 58 +++++
> > 4 files changed, 428 insertions(+), 2 deletions(-)
> > create mode 100644 drivers/remoteproc/st_slim_rproc.c
> > create mode 100644 include/linux/remoteproc/st_slim_rproc.h
> >
> > diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> > index f396bfe..9270c8e 100644
> > --- a/drivers/remoteproc/Kconfig
> > +++ b/drivers/remoteproc/Kconfig
> > @@ -58,7 +58,6 @@ config DA8XX_REMOTEPROC
> > tristate "DA8xx/OMAP-L13x remoteproc support"
> > depends on ARCH_DAVINCI_DA8XX
> > select CMA if MMU
> > - select REMOTEPROC
>
> No, this is an unrelated change to this patch.
Sorry that crept in as part of the rebase. Will fix.
>
> > select RPMSG_VIRTIO
> > help
> > Say y here to support DA8xx/OMAP-L13x remote processors via the
> > @@ -99,10 +98,10 @@ config QCOM_WCNSS_PIL
> > tristate "Qualcomm WCNSS Peripheral Image Loader"
> > depends on OF && ARCH_QCOM
> > depends on QCOM_SMEM
> > + depends on REMOTEPROC
> > select QCOM_MDT_LOADER
> > select QCOM_SCM
> > select QCOM_WCNSS_IRIS
> > - select REMOTEPROC
>
> Dito.
Will fix.
>
>
> As you now make changes to the entire remoteproc Kconfig file, rather
> than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> without providing Linus with a messy merge conflict.
>
> So the remoteproc parts now has to go through my tree.
OK, I think the best approach is for Vinod to create an immutable
branch with the entire fdma series on, and then both of you merge that branch into
your respective trees.
That way there won't be any conflicts and you can both accept further changes
for v4.9 release. Trying to take half the series via rproc, and half via dma trees won't work
because they have dependencies on each other.
I will send a v11 series in a moment which includes the feedback in this email
and also include the additional fixes which Vinod has applied since the driver
has been in linux-next.
>
> > help
> > Say y here to support the Peripheral Image Loader for the Qualcomm
> > Wireless Connectivity Subsystem.
> > @@ -116,4 +115,8 @@ config ST_REMOTEPROC
> > processor framework.
> > This can be either built-in or a loadable module.
> >
> > +config ST_SLIM_REMOTEPROC
> > + tristate
> > + select REMOTEPROC
> > +
> > endmenu
> [..]
> > diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
> [..]
> > +struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
> > + char *fw_name)
> > +{
> [..]
> > + rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
> > + fw_name, sizeof(*slim_rproc));
> [..]
> > + rproc_put(rproc);
>
> As of v4.9 you need to rproc_free() rather than rproc_put() to undo
> rproc_alloc().
Will fix.
regards,
Peter.
On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> >
> > As you now make changes to the entire remoteproc Kconfig file, rather
> > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > without providing Linus with a messy merge conflict.
> >
> > So the remoteproc parts now has to go through my tree.
>
> OK, I think the best approach is for Vinod to create an immutable
> branch with the entire fdma series on, and then both of you merge that branch into
> your respective trees.
my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
tag, please do let me know
>
> That way there won't be any conflicts and you can both accept further changes
> for v4.9 release. Trying to take half the series via rproc, and half via dma trees won't work
> because they have dependencies on each other.
>
> I will send a v11 series in a moment which includes the feedback in this email
> and also include the additional fixes which Vinod has applied since the driver
> has been in linux-next.
WHY.. Stuff is already merged twice! Please send updated on top of already
merged code! This is how kernel developement is done...
--
~Vinod
Hi Vinod,
On Mon, 14 Nov 2016, Vinod Koul wrote:
> On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> > >
> > > As you now make changes to the entire remoteproc Kconfig file, rather
> > > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > > without providing Linus with a messy merge conflict.
> > >
> > > So the remoteproc parts now has to go through my tree.
> >
> > OK, I think the best approach is for Vinod to create an immutable
> > branch with the entire fdma series on, and then both of you merge that branch into
> > your respective trees.
>
> my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
> tag, please do let me know
OK.
>
> >
> > That way there won't be any conflicts and you can both accept further changes
> > for v4.9 release. Trying to take half the series via rproc, and half via dma trees won't work
> > because they have dependencies on each other.
> >
> > I will send a v11 series in a moment which includes the feedback in this email
> > and also include the additional fixes which Vinod has applied since the driver
> > has been in linux-next.
>
> WHY.. Stuff is already merged twice!
When the feedback is "there is an unrelated change in this patch", the only way
you can fix that is by having a new version of the patch.
>Please send updated on top of already
> merged code!
You have dropped the remoteproc parts which were updated in v11, so
it is no longer merged. Bjorn can now pick the v11 versions if he chooses which
incporporates his feedback.
>This is how kernel developement is done...
regards,
Peter.
On Mon, Nov 14, 2016 at 11:42:16AM +0000, Peter Griffin wrote:
> Hi Vinod,
>
> On Mon, 14 Nov 2016, Vinod Koul wrote:
>
> > On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> > > >
> > > > As you now make changes to the entire remoteproc Kconfig file, rather
> > > > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > > > without providing Linus with a messy merge conflict.
> > > >
> > > > So the remoteproc parts now has to go through my tree.
> > >
> > > OK, I think the best approach is for Vinod to create an immutable
> > > branch with the entire fdma series on, and then both of you merge that branch into
> > > your respective trees.
> >
> > my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
> > tag, please do let me know
>
> OK.
>
> >
> > >
> > > That way there won't be any conflicts and you can both accept further changes
> > > for v4.9 release. Trying to take half the series via rproc, and half via dma trees won't work
> > > because they have dependencies on each other.
> > >
> > > I will send a v11 series in a moment which includes the feedback in this email
> > > and also include the additional fixes which Vinod has applied since the driver
> > > has been in linux-next.
> >
> > WHY.. Stuff is already merged twice!
>
> When the feedback is "there is an unrelated change in this patch", the only way
> you can fix that is by having a new version of the patch.
It can be reverted and clean patch applied..
--
~Vinod
On Sun 13 Nov 21:18 PST 2016, Vinod Koul wrote:
> On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> > >
> > > As you now make changes to the entire remoteproc Kconfig file, rather
> > > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > > without providing Linus with a messy merge conflict.
> > >
> > > So the remoteproc parts now has to go through my tree.
> >
> > OK, I think the best approach is for Vinod to create an immutable
> > branch with the entire fdma series on, and then both of you merge that branch into
> > your respective trees.
>
> my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
> tag, please do let me know
>
Hi Vinod,
It looks like you reverted the wrong Kconfig fix, the one I objected to
was the change in drivers/remoteproc, not the one in drivers/dma.
The ST_FMDA depends on functions exposed by REMOTEPROC and
ST_SLIM_REMOTEPROC, the latter in turn depends on REMOTEPROC, which you
guys made user selectable - and as such should not be selected - but I
think we should move forward and get everything merged and then we can
go back and figure out how this should be addressed (or left alone?).
I have merged "topic/st_fdma" into rproc-next, so that I can fix up the
now broken drivers/remoteproc/Kconfig.
We do however both need to revert the revert or there will be link
errors if you build the dma driver with remoteproc=n. If you do this I
can merge the topic once more and we'll keep the set of changes in sync.
Regards,
Bjorn
On Wed, Nov 16, 2016 at 10:36:46PM -0800, Bjorn Andersson wrote:
> On Sun 13 Nov 21:18 PST 2016, Vinod Koul wrote:
>
> > On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> > > >
> > > > As you now make changes to the entire remoteproc Kconfig file, rather
> > > > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > > > without providing Linus with a messy merge conflict.
> > > >
> > > > So the remoteproc parts now has to go through my tree.
> > >
> > > OK, I think the best approach is for Vinod to create an immutable
> > > branch with the entire fdma series on, and then both of you merge that branch into
> > > your respective trees.
> >
> > my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
> > tag, please do let me know
> >
>
> Hi Vinod,
>
> It looks like you reverted the wrong Kconfig fix, the one I objected to
> was the change in drivers/remoteproc, not the one in drivers/dma.
>
> The ST_FMDA depends on functions exposed by REMOTEPROC and
> ST_SLIM_REMOTEPROC, the latter in turn depends on REMOTEPROC, which you
> guys made user selectable - and as such should not be selected - but I
> think we should move forward and get everything merged and then we can
> go back and figure out how this should be addressed (or left alone?).
>
> I have merged "topic/st_fdma" into rproc-next, so that I can fix up the
> now broken drivers/remoteproc/Kconfig.
>
> We do however both need to revert the revert or there will be link
> errors if you build the dma driver with remoteproc=n. If you do this I
> can merge the topic once more and we'll keep the set of changes in sync.
Oops my bad, thanks for letting me know. I have reverted this now and
pushing out. Please do let me know if this was fine
Thanks
--
~Vinod
On Thu 17 Nov 01:52 PST 2016, Vinod Koul wrote:
> On Wed, Nov 16, 2016 at 10:36:46PM -0800, Bjorn Andersson wrote:
> > On Sun 13 Nov 21:18 PST 2016, Vinod Koul wrote:
> >
> > > On Mon, Nov 07, 2016 at 01:57:35PM +0000, Peter Griffin wrote:
> > > > >
> > > > > As you now make changes to the entire remoteproc Kconfig file, rather
> > > > > than simply add a Kconfig symbol we can't bring this in via Vinod's tree
> > > > > without providing Linus with a messy merge conflict.
> > > > >
> > > > > So the remoteproc parts now has to go through my tree.
> > > >
> > > > OK, I think the best approach is for Vinod to create an immutable
> > > > branch with the entire fdma series on, and then both of you merge that branch into
> > > > your respective trees.
> > >
> > > my topic/st_fdma is immutable branch. You cna merge it, if you need a signed
> > > tag, please do let me know
> > >
> >
> > Hi Vinod,
> >
> > It looks like you reverted the wrong Kconfig fix, the one I objected to
> > was the change in drivers/remoteproc, not the one in drivers/dma.
> >
> > The ST_FMDA depends on functions exposed by REMOTEPROC and
> > ST_SLIM_REMOTEPROC, the latter in turn depends on REMOTEPROC, which you
> > guys made user selectable - and as such should not be selected - but I
> > think we should move forward and get everything merged and then we can
> > go back and figure out how this should be addressed (or left alone?).
> >
> > I have merged "topic/st_fdma" into rproc-next, so that I can fix up the
> > now broken drivers/remoteproc/Kconfig.
> >
> > We do however both need to revert the revert or there will be link
> > errors if you build the dma driver with remoteproc=n. If you do this I
> > can merge the topic once more and we'll keep the set of changes in sync.
>
> Oops my bad, thanks for letting me know. I have reverted this now and
> pushing out. Please do let me know if this was fine
>
Thanks for the update Vinod, I've merged in your updated branch into
mine, so now we should be good.
Regards,
Bjorn