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Commit 2ceedf97 authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'dmaengine-4.13-rc1' of git://git.infradead.org/users/vkoul/slave-dma 

Pull dmaengine updates from Vinod Koul:

 - removal of AVR32 support in dw driver as AVR32 is gone

 - new driver for Broadcom stream buffer accelerator (SBA) RAID driver

 - add support for Faraday Technology FTDMAC020 in amba-pl08x driver

 - IOMMU support in pl330 driver

 - updates to bunch of drivers

* tag 'dmaengine-4.13-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (36 commits)
  dmaengine: qcom_hidma: correct API violation for submit
  dmaengine: zynqmp_dma: Remove max len check in zynqmp_dma_prep_memcpy
  dmaengine: tegra-apb: Really fix runtime-pm usage
  dmaengine: fsl_raid: make of_device_ids const.
  dmaengine: qcom_hidma: allow ACPI/DT parameters to be overridden
  dmaengine: fsldma: set BWC, DAHTS and SAHTS values correctly
  dmaengine: Kconfig: Simplify the help text for MXS_DMA
  dmaengine: pl330: Delete unused functions
  dmaengine: Replace WARN_TAINT_ONCE() with pr_warn_once()
  dmaengine: Kconfig: Extend the dependency for MXS_DMA
  dmaengine: mxs: Use %zu for printing a size_t variable
  dmaengine: ste_dma40: Cleanup scatterlist layering violations
  dmaengine: imx-dma: cleanup scatterlist layering violations
  dmaengine: use proper name for the R-Car SoC
  dmaengine: imx-sdma: Fix compilation warning.
  dmaengine: imx-sdma: Handle return value of clk_prepare_enable
  dmaengine: pl330: Add IOMMU support to slave tranfers
  dmaengine: DW DMAC: Handle return value of clk_prepare_enable
  dmaengine: pl08x: use GENMASK() to create bitmasks
  dmaengine: pl08x: Add support for Faraday Technology FTDMAC020
  ...
parents 09b56d5a 3edc8502
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Documentation/devicetree/bindings/dma/arm-pl08x.txt
View file @ 2ceedf97
......@@ -3,6 +3,11 @@
Required properties:
- compatible: "arm,pl080", "arm,primecell";
"arm,pl081", "arm,primecell";
"faraday,ftdmac020", "arm,primecell"
- arm,primecell-periphid: on the FTDMAC020 the primecell ID is not hard-coded
in the hardware and must be specified here as <0x0003b080>. This number
follows the PrimeCell standard numbering using the JEP106 vendor code 0x38
for Faraday Technology.
- reg: Address range of the PL08x registers
- interrupt: The PL08x interrupt number
- clocks: The clock running the IP core clock
......@@ -20,8 +25,8 @@ Optional properties:
- dma-requests: contains the total number of DMA requests supported by the DMAC
- memcpy-burst-size: the size of the bursts for memcpy: 1, 4, 8, 16, 32
64, 128 or 256 bytes are legal values
- memcpy-bus-width: the bus width used for memcpy: 8, 16 or 32 are legal
values
- memcpy-bus-width: the bus width used for memcpy in bits: 8, 16 or 32 are legal
values, the Faraday FTDMAC020 can also accept 64 bits
Clients
Required properties:
......
Documentation/devicetree/bindings/dma/brcm,iproc-sba.txt 0 → 100644
View file @ 2ceedf97
* Broadcom SBA RAID engine
Required properties:
- compatible: Should be one of the following
"brcm,iproc-sba"
"brcm,iproc-sba-v2"
The "brcm,iproc-sba" has support for only 6 PQ coefficients
The "brcm,iproc-sba-v2" has support for only 30 PQ coefficients
- mboxes: List of phandle and mailbox channel specifiers
Example:
raid_mbox: mbox@67400000 {
...
#mbox-cells = <3>;
...
};
raid0 {
compatible = "brcm,iproc-sba-v2";
mboxes = <&raid_mbox 0 0x1 0xffff>,
<&raid_mbox 1 0x1 0xffff>,
<&raid_mbox 2 0x1 0xffff>,
<&raid_mbox 3 0x1 0xffff>,
<&raid_mbox 4 0x1 0xffff>,
<&raid_mbox 5 0x1 0xffff>,
<&raid_mbox 6 0x1 0xffff>,
<&raid_mbox 7 0x1 0xffff>;
};
Documentation/devicetree/bindings/dma/renesas,rcar-dmac.txt
View file @ 2ceedf97
......@@ -30,8 +30,9 @@ Required Properties:
- interrupts: interrupt specifiers for the DMAC, one for each entry in
interrupt-names.
- interrupt-names: one entry per channel, named "ch%u", where %u is the
channel number ranging from zero to the number of channels minus one.
- interrupt-names: one entry for the error interrupt, named "error", plus one
entry per channel, named "ch%u", where %u is the channel number ranging from
zero to the number of channels minus one.
- clock-names: "fck" for the functional clock
- clocks: a list of phandle + clock-specifier pairs, one for each entry
......
Documentation/devicetree/bindings/dma/shdma.txt
View file @ 2ceedf97
* SHDMA Device Tree bindings
Sh-/r-mobile and r-car systems often have multiple identical DMA controller
Sh-/r-mobile and R-Car systems often have multiple identical DMA controller
instances, capable of serving any of a common set of DMA slave devices, using
the same configuration. To describe this topology we require all compatible
SHDMA DT nodes to be placed under a DMA multiplexer node. All such compatible
......
arch/arm/mach-lpc32xx/phy3250.c
View file @ 2ceedf97
......@@ -137,6 +137,9 @@ static void pl08x_put_signal(const struct pl08x_channel_data *cd, int ch)
}
static struct pl08x_platform_data pl08x_pd = {
/* Some reasonable memcpy defaults */
.memcpy_burst_size = PL08X_BURST_SZ_256,
.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
.slave_channels = &pl08x_slave_channels[0],
.num_slave_channels = ARRAY_SIZE(pl08x_slave_channels),
.get_xfer_signal = pl08x_get_signal,
......
arch/arm/mach-s3c64xx/pl080.c
View file @ 2ceedf97
......@@ -137,16 +137,10 @@ static const struct dma_slave_map s3c64xx_dma0_slave_map[] = {
};
struct pl08x_platform_data s3c64xx_dma0_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
.cctl_memcpy =
(PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT |
PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE |
PL080_CONTROL_PROT_SYS),
},
.memcpy_burst_size = PL08X_BURST_SZ_4,
.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
.memcpy_prot_buff = true,
.memcpy_prot_cache = true,
.lli_buses = PL08X_AHB1,
.mem_buses = PL08X_AHB1,
.get_xfer_signal = pl08x_get_xfer_signal,
......@@ -238,16 +232,10 @@ static const struct dma_slave_map s3c64xx_dma1_slave_map[] = {
};
struct pl08x_platform_data s3c64xx_dma1_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
.cctl_memcpy =
(PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT |
PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE |
PL080_CONTROL_PROT_SYS),
},
.memcpy_burst_size = PL08X_BURST_SZ_4,
.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
.memcpy_prot_buff = true,
.memcpy_prot_cache = true,
.lli_buses = PL08X_AHB1,
.mem_buses = PL08X_AHB1,
.get_xfer_signal = pl08x_get_xfer_signal,
......
arch/arm/mach-spear/spear3xx.c
View file @ 2ceedf97
......@@ -44,16 +44,10 @@ struct pl022_ssp_controller pl022_plat_data = {
/* dmac device registration */
struct pl08x_platform_data pl080_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
.cctl_memcpy =
(PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \
PL080_CONTROL_PROT_SYS),
},
.memcpy_burst_size = PL08X_BURST_SZ_16,
.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
.memcpy_prot_buff = true,
.memcpy_prot_cache = true,
.lli_buses = PL08X_AHB1,
.mem_buses = PL08X_AHB1,
.get_xfer_signal = pl080_get_signal,
......
arch/arm/mach-spear/spear6xx.c
View file @ 2ceedf97
......@@ -322,16 +322,10 @@ static struct pl08x_channel_data spear600_dma_info[] = {
};
static struct pl08x_platform_data spear6xx_pl080_plat_data = {
.memcpy_channel = {
.bus_id = "memcpy",
.cctl_memcpy =
(PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT | \
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT | \
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT | \
PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE | \
PL080_CONTROL_PROT_SYS),
},
.memcpy_burst_size = PL08X_BURST_SZ_16,
.memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
.memcpy_prot_buff = true,
.memcpy_prot_cache = true,
.lli_buses = PL08X_AHB1,
.mem_buses = PL08X_AHB1,
.get_xfer_signal = pl080_get_signal,
......
crypto/async_tx/async_pq.c
View file @ 2ceedf97
......@@ -62,9 +62,6 @@ do_async_gen_syndrome(struct dma_chan *chan,
dma_addr_t dma_dest[2];
int src_off = 0;
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
while (src_cnt > 0) {
submit->flags = flags_orig;
pq_src_cnt = min(src_cnt, dma_maxpq(dma, dma_flags));
......@@ -83,6 +80,8 @@ do_async_gen_syndrome(struct dma_chan *chan,
if (cb_fn_orig)
dma_flags |= DMA_PREP_INTERRUPT;
}
if (submit->flags & ASYNC_TX_FENCE)
dma_flags |= DMA_PREP_FENCE;
/* Drivers force forward progress in case they can not provide
* a descriptor
......
drivers/dma/Kconfig
View file @ 2ceedf97
......@@ -62,8 +62,10 @@ config AMBA_PL08X
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
Platform has a PL08x DMAC device
which can provide DMA engine support
Say yes if your platform has a PL08x DMAC device which can
provide DMA engine support. This includes the original ARM
PL080 and PL081, Samsungs PL080 derivative and Faraday
Technology's FTDMAC020 PL080 derivative.
config AMCC_PPC440SPE_ADMA
tristate "AMCC PPC440SPe ADMA support"
......@@ -99,6 +101,21 @@ config AXI_DMAC
controller is often used in Analog Device's reference designs for FPGA
platforms.
config BCM_SBA_RAID
tristate "Broadcom SBA RAID engine support"
depends on ARM64 || COMPILE_TEST
depends on MAILBOX && RAID6_PQ
select DMA_ENGINE
select DMA_ENGINE_RAID
select ASYNC_TX_DISABLE_XOR_VAL_DMA
select ASYNC_TX_DISABLE_PQ_VAL_DMA
default ARCH_BCM_IPROC
help
Enable support for Broadcom SBA RAID Engine. The SBA RAID
engine is available on most of the Broadcom iProc SoCs. It
has the capability to offload memcpy, xor and pq computation
for raid5/6.
config COH901318
bool "ST-Ericsson COH901318 DMA support"
select DMA_ENGINE
......@@ -354,13 +371,12 @@ config MV_XOR_V2
config MXS_DMA
bool "MXS DMA support"
depends on SOC_IMX23 || SOC_IMX28 || SOC_IMX6Q || SOC_IMX6UL
depends on ARCH_MXS || ARCH_MXC || COMPILE_TEST
select STMP_DEVICE
select DMA_ENGINE
help
Support the MXS DMA engine. This engine including APBH-DMA
and APBX-DMA is integrated into Freescale
i.MX23/28/MX6Q/MX6DL/MX6UL chips.
and APBX-DMA is integrated into some Freescale chips.
config MX3_IPU
bool "MX3x Image Processing Unit support"
......
drivers/dma/Makefile
View file @ 2ceedf97
......@@ -17,6 +17,7 @@ obj-$(CONFIG_AMCC_PPC440SPE_ADMA) += ppc4xx/
obj-$(CONFIG_AT_HDMAC) += at_hdmac.o
obj-$(CONFIG_AT_XDMAC) += at_xdmac.o
obj-$(CONFIG_AXI_DMAC) += dma-axi-dmac.o
obj-$(CONFIG_BCM_SBA_RAID) += bcm-sba-raid.o
obj-$(CONFIG_COH901318) += coh901318.o coh901318_lli.o
obj-$(CONFIG_DMA_BCM2835) += bcm2835-dma.o
obj-$(CONFIG_DMA_JZ4740) += dma-jz4740.o
......
drivers/dma/amba-pl08x.c
View file @ 2ceedf97
/*
* Copyright (c) 2006 ARM Ltd.
* Copyright (c) 2010 ST-Ericsson SA
* Copyirght (c) 2017 Linaro Ltd.
*
* Author: Peter Pearse <peter.pearse@arm.com>
* Author: Linus Walleij <linus.walleij@stericsson.com>
* Author: Linus Walleij <linus.walleij@linaro.org>
*
* 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
......@@ -110,11 +111,12 @@ struct pl08x_driver_data;
* @channels: the number of channels available in this variant
* @signals: the number of request signals available from the hardware
* @dualmaster: whether this version supports dual AHB masters or not.
* @nomadik: whether the channels have Nomadik security extension bits
* that need to be checked for permission before use and some registers are
* missing
* @pl080s: whether this version is a PL080S, which has separate register and
* LLI word for transfer size.
* @nomadik: whether this variant is a ST Microelectronics Nomadik, where the
* channels have Nomadik security extension bits that need to be checked
* for permission before use and some registers are missing
* @pl080s: whether this variant is a Samsung PL080S, which has separate
* register and LLI word for transfer size.
* @ftdmac020: whether this variant is a Faraday Technology FTDMAC020
* @max_transfer_size: the maximum single element transfer size for this
* PL08x variant.
*/
......@@ -125,6 +127,7 @@ struct vendor_data {
bool dualmaster;
bool nomadik;
bool pl080s;
bool ftdmac020;
u32 max_transfer_size;
};
......@@ -148,19 +151,34 @@ struct pl08x_bus_data {
* @id: physical index to this channel
* @base: memory base address for this physical channel
* @reg_config: configuration address for this physical channel
* @reg_control: control address for this physical channel
* @reg_src: transfer source address register
* @reg_dst: transfer destination address register
* @reg_lli: transfer LLI address register
* @reg_busy: if the variant has a special per-channel busy register,
* this contains a pointer to it
* @lock: a lock to use when altering an instance of this struct
* @serving: the virtual channel currently being served by this physical
* channel
* @locked: channel unavailable for the system, e.g. dedicated to secure
* world
* @ftdmac020: channel is on a FTDMAC020
* @pl080s: channel is on a PL08s
*/
struct pl08x_phy_chan {
unsigned int id;
void __iomem *base;
void __iomem *reg_config;
void __iomem *reg_control;
void __iomem *reg_src;
void __iomem *reg_dst;
void __iomem *reg_lli;
void __iomem *reg_busy;
spinlock_t lock;
struct pl08x_dma_chan *serving;
bool locked;
bool ftdmac020;
bool pl080s;
};
/**
......@@ -253,8 +271,9 @@ struct pl08x_dma_chan {
/**
* struct pl08x_driver_data - the local state holder for the PL08x
* @slave: slave engine for this instance
* @slave: optional slave engine for this instance
* @memcpy: memcpy engine for this instance
* @has_slave: the PL08x has a slave engine (routed signals)
* @base: virtual memory base (remapped) for the PL08x
* @adev: the corresponding AMBA (PrimeCell) bus entry
* @vd: vendor data for this PL08x variant
......@@ -269,6 +288,7 @@ struct pl08x_dma_chan {
struct pl08x_driver_data {
struct dma_device slave;
struct dma_device memcpy;
bool has_slave;
void __iomem *base;
struct amba_device *adev;
const struct vendor_data *vd;
......@@ -360,10 +380,24 @@ static int pl08x_phy_channel_busy(struct pl08x_phy_chan *ch)
{
unsigned int val;
/* If we have a special busy register, take a shortcut */
if (ch->reg_busy) {
val = readl(ch->reg_busy);
return !!(val & BIT(ch->id));
}
val = readl(ch->reg_config);
return val & PL080_CONFIG_ACTIVE;
}
/*
* pl08x_write_lli() - Write an LLI into the DMA controller.
*
* The PL08x derivatives support linked lists, but the first item of the
* list containing the source, destination, control word and next LLI is
* ignored. Instead the driver has to write those values directly into the
* SRC, DST, LLI and control registers. On FTDMAC020 also the SIZE
* register need to be set up for the first transfer.
*/
static void pl08x_write_lli(struct pl08x_driver_data *pl08x,
struct pl08x_phy_chan *phychan, const u32 *lli, u32 ccfg)
{
......@@ -381,11 +415,112 @@ static void pl08x_write_lli(struct pl08x_driver_data *pl08x,
phychan->id, lli[PL080_LLI_SRC], lli[PL080_LLI_DST],
lli[PL080_LLI_LLI], lli[PL080_LLI_CCTL], ccfg);
writel_relaxed(lli[PL080_LLI_SRC], phychan->base + PL080_CH_SRC_ADDR);
writel_relaxed(lli[PL080_LLI_DST], phychan->base + PL080_CH_DST_ADDR);
writel_relaxed(lli[PL080_LLI_LLI], phychan->base + PL080_CH_LLI);
writel_relaxed(lli[PL080_LLI_CCTL], phychan->base + PL080_CH_CONTROL);
writel_relaxed(lli[PL080_LLI_SRC], phychan->reg_src);
writel_relaxed(lli[PL080_LLI_DST], phychan->reg_dst);
writel_relaxed(lli[PL080_LLI_LLI], phychan->reg_lli);
/*
* The FTMAC020 has a different layout in the CCTL word of the LLI
* and the CCTL register which is split in CSR and SIZE registers.
* Convert the LLI item CCTL into the proper values to write into
* the CSR and SIZE registers.
*/
if (phychan->ftdmac020) {
u32 llictl = lli[PL080_LLI_CCTL];
u32 val = 0;
/* Write the transfer size (12 bits) to the size register */
writel_relaxed(llictl & FTDMAC020_LLI_TRANSFER_SIZE_MASK,
phychan->base + FTDMAC020_CH_SIZE);
/*
* Then write the control bits 28..16 to the control register
* by shuffleing the bits around to where they are in the
* main register. The mapping is as follows:
* Bit 28: TC_MSK - mask on all except last LLI
* Bit 27..25: SRC_WIDTH
* Bit 24..22: DST_WIDTH
* Bit 21..20: SRCAD_CTRL
* Bit 19..17: DSTAD_CTRL
* Bit 17: SRC_SEL
* Bit 16: DST_SEL
*/
if (llictl & FTDMAC020_LLI_TC_MSK)
val |= FTDMAC020_CH_CSR_TC_MSK;
val |= ((llictl & FTDMAC020_LLI_SRC_WIDTH_MSK) >>
(FTDMAC020_LLI_SRC_WIDTH_SHIFT -
FTDMAC020_CH_CSR_SRC_WIDTH_SHIFT));
val |= ((llictl & FTDMAC020_LLI_DST_WIDTH_MSK) >>
(FTDMAC020_LLI_DST_WIDTH_SHIFT -
FTDMAC020_CH_CSR_DST_WIDTH_SHIFT));
val |= ((llictl & FTDMAC020_LLI_SRCAD_CTL_MSK) >>
(FTDMAC020_LLI_SRCAD_CTL_SHIFT -
FTDMAC020_CH_CSR_SRCAD_CTL_SHIFT));
val |= ((llictl & FTDMAC020_LLI_DSTAD_CTL_MSK) >>
(FTDMAC020_LLI_DSTAD_CTL_SHIFT -
FTDMAC020_CH_CSR_DSTAD_CTL_SHIFT));
if (llictl & FTDMAC020_LLI_SRC_SEL)
val |= FTDMAC020_CH_CSR_SRC_SEL;
if (llictl & FTDMAC020_LLI_DST_SEL)
val |= FTDMAC020_CH_CSR_DST_SEL;
/*
* Set up the bits that exist in the CSR but are not
* part the LLI, i.e. only gets written to the control
* register right here.
*
* FIXME: do not just handle memcpy, also handle slave DMA.
*/
switch (pl08x->pd->memcpy_burst_size) {
default:
case PL08X_BURST_SZ_1:
val |= PL080_BSIZE_1 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_4:
val |= PL080_BSIZE_4 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_8:
val |= PL080_BSIZE_8 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_16:
val |= PL080_BSIZE_16 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_32:
val |= PL080_BSIZE_32 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_64:
val |= PL080_BSIZE_64 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_128:
val |= PL080_BSIZE_128 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_256:
val |= PL080_BSIZE_256 <<
FTDMAC020_CH_CSR_SRC_SIZE_SHIFT;
break;
}
/* Protection flags */
if (pl08x->pd->memcpy_prot_buff)
val |= FTDMAC020_CH_CSR_PROT2;
if (pl08x->pd->memcpy_prot_cache)
val |= FTDMAC020_CH_CSR_PROT3;
/* We are the kernel, so we are in privileged mode */
val |= FTDMAC020_CH_CSR_PROT1;
writel_relaxed(val, phychan->reg_control);
} else {
/* Bits are just identical */
writel_relaxed(lli[PL080_LLI_CCTL], phychan->reg_control);
}
/* Second control word on the PL080s */
if (pl08x->vd->pl080s)
writel_relaxed(lli[PL080S_LLI_CCTL2],
phychan->base + PL080S_CH_CONTROL2);
......@@ -423,11 +558,25 @@ static void pl08x_start_next_txd(struct pl08x_dma_chan *plchan)
cpu_relax();
/* Do not access config register until channel shows as inactive */
if (phychan->ftdmac020) {
val = readl(phychan->reg_config);
while (val & FTDMAC020_CH_CFG_BUSY)
val = readl(phychan->reg_config);
val = readl(phychan->reg_control);
while (val & FTDMAC020_CH_CSR_EN)
val = readl(phychan->reg_control);
writel(val | FTDMAC020_CH_CSR_EN,
phychan->reg_control);
} else {
val = readl(phychan->reg_config);
while ((val & PL080_CONFIG_ACTIVE) || (val & PL080_CONFIG_ENABLE))
while ((val & PL080_CONFIG_ACTIVE) ||
(val & PL080_CONFIG_ENABLE))
val = readl(phychan->reg_config);
writel(val | PL080_CONFIG_ENABLE, phychan->reg_config);
}
}
/*
......@@ -445,6 +594,14 @@ static void pl08x_pause_phy_chan(struct pl08x_phy_chan *ch)
u32 val;
int timeout;
if (ch->ftdmac020) {
/* Use the enable bit on the FTDMAC020 */
val = readl(ch->reg_control);
val &= ~FTDMAC020_CH_CSR_EN;
writel(val, ch->reg_control);
return;
}
/* Set the HALT bit and wait for the FIFO to drain */
val = readl(ch->reg_config);
val |= PL080_CONFIG_HALT;
......@@ -464,6 +621,14 @@ static void pl08x_resume_phy_chan(struct pl08x_phy_chan *ch)
{
u32 val;
/* Use the enable bit on the FTDMAC020 */
if (ch->ftdmac020) {
val = readl(ch->reg_control);
val |= FTDMAC020_CH_CSR_EN;
writel(val, ch->reg_control);
return;
}
/* Clear the HALT bit */
val = readl(ch->reg_config);
val &= ~PL080_CONFIG_HALT;
......@@ -479,25 +644,68 @@ static void pl08x_resume_phy_chan(struct pl08x_phy_chan *ch)
static void pl08x_terminate_phy_chan(struct pl08x_driver_data *pl08x,
struct pl08x_phy_chan *ch)
{
u32 val = readl(ch->reg_config);
u32 val;
/* The layout for the FTDMAC020 is different */
if (ch->ftdmac020) {
/* Disable all interrupts */
val = readl(ch->reg_config);
val |= (FTDMAC020_CH_CFG_INT_ABT_MASK |
FTDMAC020_CH_CFG_INT_ERR_MASK |
FTDMAC020_CH_CFG_INT_TC_MASK);
writel(val, ch->reg_config);
/* Abort and disable channel */
val = readl(ch->reg_control);
val &= ~FTDMAC020_CH_CSR_EN;
val |= FTDMAC020_CH_CSR_ABT;
writel(val, ch->reg_control);
/* Clear ABT and ERR interrupt flags */
writel(BIT(ch->id) | BIT(ch->id + 16),
pl08x->base + PL080_ERR_CLEAR);
writel(BIT(ch->id), pl08x->base + PL080_TC_CLEAR);
return;
}
val = readl(ch->reg_config);
val &= ~(PL080_CONFIG_ENABLE | PL080_CONFIG_ERR_IRQ_MASK |
PL080_CONFIG_TC_IRQ_MASK);
writel(val, ch->reg_config);
writel(BIT(ch->id), pl08x->base + PL080_ERR_CLEAR);
writel(BIT(ch->id), pl08x->base + PL080_TC_CLEAR);
}
static inline u32 get_bytes_in_cctl(u32 cctl)
static u32 get_bytes_in_phy_channel(struct pl08x_phy_chan *ch)
{
/* The source width defines the number of bytes */
u32 bytes = cctl & PL080_CONTROL_TRANSFER_SIZE_MASK;
u32 val;
u32 bytes;
cctl &= PL080_CONTROL_SWIDTH_MASK;
if (ch->ftdmac020) {
bytes = readl(ch->base + FTDMAC020_CH_SIZE);
switch (cctl >> PL080_CONTROL_SWIDTH_SHIFT) {
val = readl(ch->reg_control);
val &= FTDMAC020_CH_CSR_SRC_WIDTH_MSK;
val >>= FTDMAC020_CH_CSR_SRC_WIDTH_SHIFT;
} else if (ch->pl080s) {
val = readl(ch->base + PL080S_CH_CONTROL2);
bytes = val & PL080S_CONTROL_TRANSFER_SIZE_MASK;
val = readl(ch->reg_control);
val &= PL080_CONTROL_SWIDTH_MASK;
val >>= PL080_CONTROL_SWIDTH_SHIFT;
} else {
/* Plain PL08x */
val = readl(ch->reg_control);
bytes = val & PL080_CONTROL_TRANSFER_SIZE_MASK;
val &= PL080_CONTROL_SWIDTH_MASK;
val >>= PL080_CONTROL_SWIDTH_SHIFT;
}
switch (val) {
case PL080_WIDTH_8BIT:
break;
case PL080_WIDTH_16BIT:
......@@ -510,14 +718,35 @@ static inline u32 get_bytes_in_cctl(u32 cctl)
return bytes;
}
static inline u32 get_bytes_in_cctl_pl080s(u32 cctl, u32 cctl1)
static u32 get_bytes_in_lli(struct pl08x_phy_chan *ch, const u32 *llis_va)
{
/* The source width defines the number of bytes */
u32 bytes = cctl1 & PL080S_CONTROL_TRANSFER_SIZE_MASK;
u32 val;
u32 bytes;
if (ch->ftdmac020) {
val = llis_va[PL080_LLI_CCTL];
bytes = val & FTDMAC020_LLI_TRANSFER_SIZE_MASK;
val = llis_va[PL080_LLI_CCTL];
val &= FTDMAC020_LLI_SRC_WIDTH_MSK;
val >>= FTDMAC020_LLI_SRC_WIDTH_SHIFT;
} else if (ch->pl080s) {
val = llis_va[PL080S_LLI_CCTL2];
bytes = val & PL080S_CONTROL_TRANSFER_SIZE_MASK;
val = llis_va[PL080_LLI_CCTL];
val &= PL080_CONTROL_SWIDTH_MASK;
val >>= PL080_CONTROL_SWIDTH_SHIFT;
} else {
/* Plain PL08x */
val = llis_va[PL080_LLI_CCTL];
bytes = val & PL080_CONTROL_TRANSFER_SIZE_MASK;
cctl &= PL080_CONTROL_SWIDTH_MASK;
val &= PL080_CONTROL_SWIDTH_MASK;
val >>= PL080_CONTROL_SWIDTH_SHIFT;
}
switch (cctl >> PL080_CONTROL_SWIDTH_SHIFT) {
switch (val) {
case PL080_WIDTH_8BIT:
break;
case PL080_WIDTH_16BIT:
......@@ -552,15 +781,10 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
* Follow the LLIs to get the number of remaining
* bytes in the currently active transaction.
*/
clli = readl(ch->base + PL080_CH_LLI) & ~PL080_LLI_LM_AHB2;
clli = readl(ch->reg_lli) & ~PL080_LLI_LM_AHB2;
/* First get the remaining bytes in the active transfer */
if (pl08x->vd->pl080s)
bytes = get_bytes_in_cctl_pl080s(
readl(ch->base + PL080_CH_CONTROL),
readl(ch->base + PL080S_CH_CONTROL2));
else
bytes = get_bytes_in_cctl(readl(ch->base + PL080_CH_CONTROL));
bytes = get_bytes_in_phy_channel(ch);
if (!clli)
return bytes;
......@@ -581,12 +805,7 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
llis_va_limit = llis_va + llis_max_words;
for (; llis_va < llis_va_limit; llis_va += pl08x->lli_words) {
if (pl08x->vd->pl080s)
bytes += get_bytes_in_cctl_pl080s(
llis_va[PL080_LLI_CCTL],
llis_va[PL080S_LLI_CCTL2]);
else
bytes += get_bytes_in_cctl(llis_va[PL080_LLI_CCTL]);
bytes += get_bytes_in_lli(ch, llis_va);
/*
* A LLI pointer going backward terminates the LLI list
......@@ -705,7 +924,7 @@ static void pl08x_phy_free(struct pl08x_dma_chan *plchan)
break;
}
if (!next) {
if (!next && pl08x->has_slave) {
list_for_each_entry(p, &pl08x->slave.channels, vc.chan.device_node)
if (p->state == PL08X_CHAN_WAITING) {
next = p;
......@@ -746,9 +965,30 @@ static void pl08x_phy_free(struct pl08x_dma_chan *plchan)
* LLI handling
*/
static inline unsigned int pl08x_get_bytes_for_cctl(unsigned int coded)
static inline unsigned int
pl08x_get_bytes_for_lli(struct pl08x_driver_data *pl08x,
u32 cctl,
bool source)
{
switch (coded) {
u32 val;
if (pl08x->vd->ftdmac020) {
if (source)
val = (cctl & FTDMAC020_LLI_SRC_WIDTH_MSK) >>
FTDMAC020_LLI_SRC_WIDTH_SHIFT;
else
val = (cctl & FTDMAC020_LLI_DST_WIDTH_MSK) >>
FTDMAC020_LLI_DST_WIDTH_SHIFT;
} else {
if (source)
val = (cctl & PL080_CONTROL_SWIDTH_MASK) >>
PL080_CONTROL_SWIDTH_SHIFT;
else
val = (cctl & PL080_CONTROL_DWIDTH_MASK) >>
PL080_CONTROL_DWIDTH_SHIFT;
}
switch (val) {
case PL080_WIDTH_8BIT:
return 1;
case PL080_WIDTH_16BIT:
......@@ -762,26 +1002,78 @@ static inline unsigned int pl08x_get_bytes_for_cctl(unsigned int coded)
return 0;
}
static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
static inline u32 pl08x_lli_control_bits(struct pl08x_driver_data *pl08x,
u32 cctl,
u8 srcwidth, u8 dstwidth,
size_t tsize)
{
u32 retbits = cctl;
/* Remove all src, dst and transfer size bits */
/*
* Remove all src, dst and transfer size bits, then set the
* width and size according to the parameters. The bit offsets
* are different in the FTDMAC020 so we need to accound for this.
*/
if (pl08x->vd->ftdmac020) {
retbits &= ~FTDMAC020_LLI_DST_WIDTH_MSK;
retbits &= ~FTDMAC020_LLI_SRC_WIDTH_MSK;
retbits &= ~FTDMAC020_LLI_TRANSFER_SIZE_MASK;
switch (srcwidth) {
case 1:
retbits |= PL080_WIDTH_8BIT <<
FTDMAC020_LLI_SRC_WIDTH_SHIFT;
break;
case 2:
retbits |= PL080_WIDTH_16BIT <<
FTDMAC020_LLI_SRC_WIDTH_SHIFT;
break;
case 4:
retbits |= PL080_WIDTH_32BIT <<
FTDMAC020_LLI_SRC_WIDTH_SHIFT;
break;
default:
BUG();
break;
}
switch (dstwidth) {
case 1:
retbits |= PL080_WIDTH_8BIT <<
FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
case 2:
retbits |= PL080_WIDTH_16BIT <<
FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
case 4:
retbits |= PL080_WIDTH_32BIT <<
FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
default:
BUG();
break;
}
tsize &= FTDMAC020_LLI_TRANSFER_SIZE_MASK;
retbits |= tsize << FTDMAC020_LLI_TRANSFER_SIZE_SHIFT;
} else {
retbits &= ~PL080_CONTROL_DWIDTH_MASK;
retbits &= ~PL080_CONTROL_SWIDTH_MASK;
retbits &= ~PL080_CONTROL_TRANSFER_SIZE_MASK;
/* Then set the bits according to the parameters */
switch (srcwidth) {
case 1:
retbits |= PL080_WIDTH_8BIT << PL080_CONTROL_SWIDTH_SHIFT;
retbits |= PL080_WIDTH_8BIT <<
PL080_CONTROL_SWIDTH_SHIFT;
break;
case 2:
retbits |= PL080_WIDTH_16BIT << PL080_CONTROL_SWIDTH_SHIFT;
retbits |= PL080_WIDTH_16BIT <<
PL080_CONTROL_SWIDTH_SHIFT;
break;
case 4:
retbits |= PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT;
retbits |= PL080_WIDTH_32BIT <<
PL080_CONTROL_SWIDTH_SHIFT;
break;
default:
BUG();
......@@ -790,13 +1082,16 @@ static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
switch (dstwidth) {
case 1:
retbits |= PL080_WIDTH_8BIT << PL080_CONTROL_DWIDTH_SHIFT;
retbits |= PL080_WIDTH_8BIT <<
PL080_CONTROL_DWIDTH_SHIFT;
break;
case 2:
retbits |= PL080_WIDTH_16BIT << PL080_CONTROL_DWIDTH_SHIFT;
retbits |= PL080_WIDTH_16BIT <<
PL080_CONTROL_DWIDTH_SHIFT;
break;
case 4:
retbits |= PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT;
retbits |= PL080_WIDTH_32BIT <<
PL080_CONTROL_DWIDTH_SHIFT;
break;
default:
BUG();
......@@ -805,6 +1100,8 @@ static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
tsize &= PL080_CONTROL_TRANSFER_SIZE_MASK;
retbits |= tsize << PL080_CONTROL_TRANSFER_SIZE_SHIFT;
}
return retbits;
}
......@@ -825,13 +1122,35 @@ struct pl08x_lli_build_data {
* - prefers the destination bus if both available
* - prefers bus with fixed address (i.e. peripheral)
*/
static void pl08x_choose_master_bus(struct pl08x_lli_build_data *bd,
struct pl08x_bus_data **mbus, struct pl08x_bus_data **sbus, u32 cctl)
static void pl08x_choose_master_bus(struct pl08x_driver_data *pl08x,
struct pl08x_lli_build_data *bd,
struct pl08x_bus_data **mbus,
struct pl08x_bus_data **sbus,
u32 cctl)
{
if (!(cctl & PL080_CONTROL_DST_INCR)) {
bool dst_incr;
bool src_incr;
/*
* The FTDMAC020 only supports memory-to-memory transfer, so
* source and destination always increase.
*/
if (pl08x->vd->ftdmac020) {
dst_incr = true;
src_incr = true;
} else {
dst_incr = !!(cctl & PL080_CONTROL_DST_INCR);
src_incr = !!(cctl & PL080_CONTROL_SRC_INCR);
}
/*
* If either bus is not advancing, i.e. it is a peripheral, that
* one becomes master
*/
if (!dst_incr) {
*mbus = &bd->dstbus;
*sbus = &bd->srcbus;
} else if (!(cctl & PL080_CONTROL_SRC_INCR)) {
} else if (!src_incr) {
*mbus = &bd->srcbus;
*sbus = &bd->dstbus;
} else {
......@@ -869,10 +1188,16 @@ static void pl08x_fill_lli_for_desc(struct pl08x_driver_data *pl08x,
if (pl08x->vd->pl080s)
llis_va[PL080S_LLI_CCTL2] = cctl2;
if (pl08x->vd->ftdmac020) {
/* FIXME: only memcpy so far so both increase */
bd->srcbus.addr += len;
bd->dstbus.addr += len;
} else {
if (cctl & PL080_CONTROL_SRC_INCR)
bd->srcbus.addr += len;
if (cctl & PL080_CONTROL_DST_INCR)
bd->dstbus.addr += len;
}
BUG_ON(bd->remainder < len);
......@@ -883,12 +1208,12 @@ static inline void prep_byte_width_lli(struct pl08x_driver_data *pl08x,
struct pl08x_lli_build_data *bd, u32 *cctl, u32 len,
int num_llis, size_t *total_bytes)
{
*cctl = pl08x_cctl_bits(*cctl, 1, 1, len);
*cctl = pl08x_lli_control_bits(pl08x, *cctl, 1, 1, len);
pl08x_fill_lli_for_desc(pl08x, bd, num_llis, len, *cctl, len);
(*total_bytes) += len;
}
#ifdef VERBOSE_DEBUG
#if 1
static void pl08x_dump_lli(struct pl08x_driver_data *pl08x,
const u32 *llis_va, int num_llis)
{
......@@ -953,14 +1278,10 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
cctl = txd->cctl;
/* Find maximum width of the source bus */
bd.srcbus.maxwidth =
pl08x_get_bytes_for_cctl((cctl & PL080_CONTROL_SWIDTH_MASK) >>
PL080_CONTROL_SWIDTH_SHIFT);
bd.srcbus.maxwidth = pl08x_get_bytes_for_lli(pl08x, cctl, true);
/* Find maximum width of the destination bus */
bd.dstbus.maxwidth =
pl08x_get_bytes_for_cctl((cctl & PL080_CONTROL_DWIDTH_MASK) >>
PL080_CONTROL_DWIDTH_SHIFT);
bd.dstbus.maxwidth = pl08x_get_bytes_for_lli(pl08x, cctl, false);
list_for_each_entry(dsg, &txd->dsg_list, node) {
total_bytes = 0;
......@@ -972,7 +1293,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
bd.srcbus.buswidth = bd.srcbus.maxwidth;
bd.dstbus.buswidth = bd.dstbus.maxwidth;
pl08x_choose_master_bus(&bd, &mbus, &sbus, cctl);
pl08x_choose_master_bus(pl08x, &bd, &mbus, &sbus, cctl);
dev_vdbg(&pl08x->adev->dev,
"src=0x%08llx%s/%u dst=0x%08llx%s/%u len=%zu\n",
......@@ -1009,7 +1330,13 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
* supported. Thus, we can't have scattered addresses.
*/
if (!bd.remainder) {
u32 fc = (txd->ccfg & PL080_CONFIG_FLOW_CONTROL_MASK) >>
u32 fc;
/* FTDMAC020 only does memory-to-memory */
if (pl08x->vd->ftdmac020)
fc = PL080_FLOW_MEM2MEM;
else
fc = (txd->ccfg & PL080_CONFIG_FLOW_CONTROL_MASK) >>
PL080_CONFIG_FLOW_CONTROL_SHIFT;
if (!((fc >= PL080_FLOW_SRC2DST_DST) &&
(fc <= PL080_FLOW_SRC2DST_SRC))) {
......@@ -1027,8 +1354,9 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
return 0;
}
cctl = pl08x_cctl_bits(cctl, bd.srcbus.buswidth,
bd.dstbus.buswidth, 0);
cctl = pl08x_lli_control_bits(pl08x, cctl,
bd.srcbus.buswidth, bd.dstbus.buswidth,
0);
pl08x_fill_lli_for_desc(pl08x, &bd, num_llis++,
0, cctl, 0);
break;
......@@ -1107,8 +1435,9 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
"size 0x%08zx (remainder 0x%08zx)\n",
__func__, lli_len, bd.remainder);
cctl = pl08x_cctl_bits(cctl, bd.srcbus.buswidth,
bd.dstbus.buswidth, tsize);
cctl = pl08x_lli_control_bits(pl08x, cctl,
bd.srcbus.buswidth, bd.dstbus.buswidth,
tsize);
pl08x_fill_lli_for_desc(pl08x, &bd, num_llis++,
lli_len, cctl, tsize);
total_bytes += lli_len;
......@@ -1151,6 +1480,9 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
/* The final LLI terminates the LLI. */
last_lli[PL080_LLI_LLI] = 0;
/* The final LLI element shall also fire an interrupt. */
if (pl08x->vd->ftdmac020)
last_lli[PL080_LLI_CCTL] &= ~FTDMAC020_LLI_TC_MSK;
else
last_lli[PL080_LLI_CCTL] |= PL080_CONTROL_TC_IRQ_EN;
}
......@@ -1317,14 +1649,25 @@ static const struct burst_table burst_sizes[] = {
* will be routed to each port. We try to have source and destination
* on separate ports, but always respect the allowable settings.
*/
static u32 pl08x_select_bus(u8 src, u8 dst)
static u32 pl08x_select_bus(bool ftdmac020, u8 src, u8 dst)
{
u32 cctl = 0;
u32 dst_ahb2;
u32 src_ahb2;
/* The FTDMAC020 use different bits to indicate src/dst bus */
if (ftdmac020) {
dst_ahb2 = FTDMAC020_LLI_DST_SEL;
src_ahb2 = FTDMAC020_LLI_SRC_SEL;
} else {
dst_ahb2 = PL080_CONTROL_DST_AHB2;
src_ahb2 = PL080_CONTROL_SRC_AHB2;
}
if (!(dst & PL08X_AHB1) || ((dst & PL08X_AHB2) && (src & PL08X_AHB1)))
cctl |= PL080_CONTROL_DST_AHB2;
cctl |= dst_ahb2;
if (!(src & PL08X_AHB1) || ((src & PL08X_AHB2) && !(dst & PL08X_AHB2)))
cctl |= PL080_CONTROL_SRC_AHB2;
cctl |= src_ahb2;
return cctl;
}
......@@ -1412,14 +1755,134 @@ static struct pl08x_txd *pl08x_get_txd(struct pl08x_dma_chan *plchan)
{
struct pl08x_txd *txd = kzalloc(sizeof(*txd), GFP_NOWAIT);
if (txd) {
if (txd)
INIT_LIST_HEAD(&txd->dsg_list);
return txd;
}
/* Always enable error and terminal interrupts */
txd->ccfg = PL080_CONFIG_ERR_IRQ_MASK |
PL080_CONFIG_TC_IRQ_MASK;
static u32 pl08x_memcpy_cctl(struct pl08x_driver_data *pl08x)
{
u32 cctl = 0;
/* Conjure cctl */
switch (pl08x->pd->memcpy_burst_size) {
default:
dev_err(&pl08x->adev->dev,
"illegal burst size for memcpy, set to 1\n");
/* Fall through */
case PL08X_BURST_SZ_1:
cctl |= PL080_BSIZE_1 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_1 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_4:
cctl |= PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_8:
cctl |= PL080_BSIZE_8 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_8 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_16:
cctl |= PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_32:
cctl |= PL080_BSIZE_32 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_32 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_64:
cctl |= PL080_BSIZE_64 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_64 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_128:
cctl |= PL080_BSIZE_128 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_128 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
case PL08X_BURST_SZ_256:
cctl |= PL080_BSIZE_256 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_256 << PL080_CONTROL_DB_SIZE_SHIFT;
break;
}
return txd;
switch (pl08x->pd->memcpy_bus_width) {
default:
dev_err(&pl08x->adev->dev,
"illegal bus width for memcpy, set to 8 bits\n");
/* Fall through */
case PL08X_BUS_WIDTH_8_BITS:
cctl |= PL080_WIDTH_8BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_8BIT << PL080_CONTROL_DWIDTH_SHIFT;
break;
case PL08X_BUS_WIDTH_16_BITS:
cctl |= PL080_WIDTH_16BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_16BIT << PL080_CONTROL_DWIDTH_SHIFT;
break;
case PL08X_BUS_WIDTH_32_BITS:
cctl |= PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT;
break;
}
/* Protection flags */
if (pl08x->pd->memcpy_prot_buff)
cctl |= PL080_CONTROL_PROT_BUFF;
if (pl08x->pd->memcpy_prot_cache)
cctl |= PL080_CONTROL_PROT_CACHE;
/* We are the kernel, so we are in privileged mode */
cctl |= PL080_CONTROL_PROT_SYS;
/* Both to be incremented or the code will break */
cctl |= PL080_CONTROL_SRC_INCR | PL080_CONTROL_DST_INCR;
if (pl08x->vd->dualmaster)
cctl |= pl08x_select_bus(false,
pl08x->mem_buses,
pl08x->mem_buses);
return cctl;
}
static u32 pl08x_ftdmac020_memcpy_cctl(struct pl08x_driver_data *pl08x)
{
u32 cctl = 0;
/* Conjure cctl */
switch (pl08x->pd->memcpy_bus_width) {
default:
dev_err(&pl08x->adev->dev,
"illegal bus width for memcpy, set to 8 bits\n");
/* Fall through */
case PL08X_BUS_WIDTH_8_BITS:
cctl |= PL080_WIDTH_8BIT << FTDMAC020_LLI_SRC_WIDTH_SHIFT |
PL080_WIDTH_8BIT << FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
case PL08X_BUS_WIDTH_16_BITS:
cctl |= PL080_WIDTH_16BIT << FTDMAC020_LLI_SRC_WIDTH_SHIFT |
PL080_WIDTH_16BIT << FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
case PL08X_BUS_WIDTH_32_BITS:
cctl |= PL080_WIDTH_32BIT << FTDMAC020_LLI_SRC_WIDTH_SHIFT |
PL080_WIDTH_32BIT << FTDMAC020_LLI_DST_WIDTH_SHIFT;
break;
}
/*
* By default mask the TC IRQ on all LLIs, it will be unmasked on
* the last LLI item by other code.
*/
cctl |= FTDMAC020_LLI_TC_MSK;
/*
* Both to be incremented so leave bits FTDMAC020_LLI_SRCAD_CTL
* and FTDMAC020_LLI_DSTAD_CTL as zero
*/
if (pl08x->vd->dualmaster)
cctl |= pl08x_select_bus(true,
pl08x->mem_buses,
pl08x->mem_buses);
return cctl;
}
/*
......@@ -1452,18 +1915,16 @@ static struct dma_async_tx_descriptor *pl08x_prep_dma_memcpy(
dsg->src_addr = src;
dsg->dst_addr = dest;
dsg->len = len;
/* Set platform data for m2m */
txd->ccfg |= PL080_FLOW_MEM2MEM << PL080_CONFIG_FLOW_CONTROL_SHIFT;
txd->cctl = pl08x->pd->memcpy_channel.cctl_memcpy &
~(PL080_CONTROL_DST_AHB2 | PL080_CONTROL_SRC_AHB2);
/* Both to be incremented or the code will break */
txd->cctl |= PL080_CONTROL_SRC_INCR | PL080_CONTROL_DST_INCR;
if (pl08x->vd->dualmaster)
txd->cctl |= pl08x_select_bus(pl08x->mem_buses,
pl08x->mem_buses);
if (pl08x->vd->ftdmac020) {
/* Writing CCFG zero ENABLES all interrupts */
txd->ccfg = 0;
txd->cctl = pl08x_ftdmac020_memcpy_cctl(pl08x);
} else {
txd->ccfg = PL080_CONFIG_ERR_IRQ_MASK |
PL080_CONFIG_TC_IRQ_MASK |
PL080_FLOW_MEM2MEM << PL080_CONFIG_FLOW_CONTROL_SHIFT;
txd->cctl = pl08x_memcpy_cctl(pl08x);
}
ret = pl08x_fill_llis_for_desc(plchan->host, txd);
if (!ret) {
......@@ -1527,7 +1988,7 @@ static struct pl08x_txd *pl08x_init_txd(
return NULL;
}
txd->cctl = cctl | pl08x_select_bus(src_buses, dst_buses);
txd->cctl = cctl | pl08x_select_bus(false, src_buses, dst_buses);
if (plchan->cfg.device_fc)
tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER_PER :
......@@ -1536,7 +1997,9 @@ static struct pl08x_txd *pl08x_init_txd(
tmp = (direction == DMA_MEM_TO_DEV) ? PL080_FLOW_MEM2PER :
PL080_FLOW_PER2MEM;
txd->ccfg |= tmp << PL080_CONFIG_FLOW_CONTROL_SHIFT;
txd->ccfg = PL080_CONFIG_ERR_IRQ_MASK |
PL080_CONFIG_TC_IRQ_MASK |
tmp << PL080_CONFIG_FLOW_CONTROL_SHIFT;
ret = pl08x_request_mux(plchan);
if (ret < 0) {
......@@ -1813,6 +2276,11 @@ static void pl08x_ensure_on(struct pl08x_driver_data *pl08x)
/* The Nomadik variant does not have the config register */
if (pl08x->vd->nomadik)
return;
/* The FTDMAC020 variant does this in another register */
if (pl08x->vd->ftdmac020) {
writel(PL080_CONFIG_ENABLE, pl08x->base + FTDMAC020_CSR);
return;
}
writel(PL080_CONFIG_ENABLE, pl08x->base + PL080_CONFIG);
}
......@@ -1925,9 +2393,16 @@ static int pl08x_dma_init_virtual_channels(struct pl08x_driver_data *pl08x,
chan->signal = i;
pl08x_dma_slave_init(chan);
} else {
chan->cd = &pl08x->pd->memcpy_channel;
chan->cd = kzalloc(sizeof(*chan->cd), GFP_KERNEL);
if (!chan->cd) {
kfree(chan);
return -ENOMEM;
}
chan->cd->bus_id = "memcpy";
chan->cd->periph_buses = pl08x->pd->mem_buses;
chan->name = kasprintf(GFP_KERNEL, "memcpy%d", i);
if (!chan->name) {
kfree(chan->cd);
kfree(chan);
return -ENOMEM;
}
......@@ -2009,13 +2484,16 @@ static int pl08x_debugfs_show(struct seq_file *s, void *data)
pl08x_state_str(chan->state));
}
if (pl08x->has_slave) {
seq_printf(s, "\nPL08x virtual slave channels:\n");
seq_printf(s, "CHANNEL:\tSTATE:\n");
seq_printf(s, "--------\t------\n");
list_for_each_entry(chan, &pl08x->slave.channels, vc.chan.device_node) {
list_for_each_entry(chan, &pl08x->slave.channels,
vc.chan.device_node) {
seq_printf(s, "%s\t\t%s\n", chan->name,
pl08x_state_str(chan->state));
}
}
return 0;
}
......@@ -2052,6 +2530,10 @@ static struct dma_chan *pl08x_find_chan_id(struct pl08x_driver_data *pl08x,
{
struct pl08x_dma_chan *chan;
/* Trying to get a slave channel from something with no slave support */
if (!pl08x->has_slave)
return NULL;
list_for_each_entry(chan, &pl08x->slave.channels, vc.chan.device_node) {
if (chan->signal == id)
return &chan->vc.chan;
......@@ -2099,7 +2581,6 @@ static int pl08x_of_probe(struct amba_device *adev,
{
struct pl08x_platform_data *pd;
struct pl08x_channel_data *chanp = NULL;
u32 cctl_memcpy = 0;
u32 val;
int ret;
int i;
......@@ -2139,36 +2620,28 @@ static int pl08x_of_probe(struct amba_device *adev,
dev_err(&adev->dev, "illegal burst size for memcpy, set to 1\n");
/* Fall through */
case 1:
cctl_memcpy |= PL080_BSIZE_1 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_1 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_1;
break;
case 4:
cctl_memcpy |= PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_4;
break;
case 8:
cctl_memcpy |= PL080_BSIZE_8 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_8 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_8;
break;
case 16:
cctl_memcpy |= PL080_BSIZE_16 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_16 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_16;
break;
case 32:
cctl_memcpy |= PL080_BSIZE_32 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_32 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_32;
break;
case 64:
cctl_memcpy |= PL080_BSIZE_64 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_64 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_64;
break;
case 128:
cctl_memcpy |= PL080_BSIZE_128 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_128 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_128;
break;
case 256:
cctl_memcpy |= PL080_BSIZE_256 << PL080_CONTROL_SB_SIZE_SHIFT |
PL080_BSIZE_256 << PL080_CONTROL_DB_SIZE_SHIFT;
pd->memcpy_burst_size = PL08X_BURST_SZ_256;
break;
}
......@@ -2182,34 +2655,23 @@ static int pl08x_of_probe(struct amba_device *adev,
dev_err(&adev->dev, "illegal bus width for memcpy, set to 8 bits\n");
/* Fall through */
case 8:
cctl_memcpy |= PL080_WIDTH_8BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_8BIT << PL080_CONTROL_DWIDTH_SHIFT;
pd->memcpy_bus_width = PL08X_BUS_WIDTH_8_BITS;
break;
case 16:
cctl_memcpy |= PL080_WIDTH_16BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_16BIT << PL080_CONTROL_DWIDTH_SHIFT;
pd->memcpy_bus_width = PL08X_BUS_WIDTH_16_BITS;
break;
case 32:
cctl_memcpy |= PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT;
pd->memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS;
break;
}
/* This is currently the only thing making sense */
cctl_memcpy |= PL080_CONTROL_PROT_SYS;
/* Set up memcpy channel */
pd->memcpy_channel.bus_id = "memcpy";
pd->memcpy_channel.cctl_memcpy = cctl_memcpy;
/* Use the buses that can access memory, obviously */
pd->memcpy_channel.periph_buses = pd->mem_buses;
/*
* Allocate channel data for all possible slave channels (one
* for each possible signal), channels will then be allocated
* for a device and have it's AHB interfaces set up at
* translation time.
*/
if (pl08x->vd->signals) {
chanp = devm_kcalloc(&adev->dev,
pl08x->vd->signals,
sizeof(struct pl08x_channel_data),
......@@ -2219,11 +2681,14 @@ static int pl08x_of_probe(struct amba_device *adev,
pd->slave_channels = chanp;
for (i = 0; i < pl08x->vd->signals; i++) {
/* chanp->periph_buses will be assigned at translation */
/*
* chanp->periph_buses will be assigned at translation
*/
chanp->bus_id = kasprintf(GFP_KERNEL, "slave%d", i);
chanp++;
}
pd->num_slave_channels = pl08x->vd->signals;
}
pl08x->pd = pd;
......@@ -2242,7 +2707,7 @@ static inline int pl08x_of_probe(struct amba_device *adev,
static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
{
struct pl08x_driver_data *pl08x;
const struct vendor_data *vd = id->data;
struct vendor_data *vd = id->data;
struct device_node *np = adev->dev.of_node;
u32 tsfr_size;
int ret = 0;
......@@ -2268,6 +2733,34 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
pl08x->adev = adev;
pl08x->vd = vd;
pl08x->base = ioremap(adev->res.start, resource_size(&adev->res));
if (!pl08x->base) {
ret = -ENOMEM;
goto out_no_ioremap;
}
if (vd->ftdmac020) {
u32 val;
val = readl(pl08x->base + FTDMAC020_REVISION);
dev_info(&pl08x->adev->dev, "FTDMAC020 %d.%d rel %d\n",
(val >> 16) & 0xff, (val >> 8) & 0xff, val & 0xff);
val = readl(pl08x->base + FTDMAC020_FEATURE);
dev_info(&pl08x->adev->dev, "FTDMAC020 %d channels, "
"%s built-in bridge, %s, %s linked lists\n",
(val >> 12) & 0x0f,
(val & BIT(10)) ? "no" : "has",
(val & BIT(9)) ? "AHB0 and AHB1" : "AHB0",
(val & BIT(8)) ? "supports" : "does not support");
/* Vendor data from feature register */
if (!(val & BIT(8)))
dev_warn(&pl08x->adev->dev,
"linked lists not supported, required\n");
vd->channels = (val >> 12) & 0x0f;
vd->dualmaster = !!(val & BIT(9));
}
/* Initialize memcpy engine */
dma_cap_set(DMA_MEMCPY, pl08x->memcpy.cap_mask);
pl08x->memcpy.dev = &adev->dev;
......@@ -2284,13 +2777,23 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
pl08x->memcpy.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->memcpy.directions = BIT(DMA_MEM_TO_MEM);
pl08x->memcpy.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
if (vd->ftdmac020)
pl08x->memcpy.copy_align = DMAENGINE_ALIGN_4_BYTES;
/* Initialize slave engine */
/*
* Initialize slave engine, if the block has no signals, that means
* we have no slave support.
*/
if (vd->signals) {
pl08x->has_slave = true;
dma_cap_set(DMA_SLAVE, pl08x->slave.cap_mask);
dma_cap_set(DMA_CYCLIC, pl08x->slave.cap_mask);
pl08x->slave.dev = &adev->dev;
pl08x->slave.device_free_chan_resources = pl08x_free_chan_resources;
pl08x->slave.device_prep_dma_interrupt = pl08x_prep_dma_interrupt;
pl08x->slave.device_free_chan_resources =
pl08x_free_chan_resources;
pl08x->slave.device_prep_dma_interrupt =
pl08x_prep_dma_interrupt;
pl08x->slave.device_tx_status = pl08x_dma_tx_status;
pl08x->slave.device_issue_pending = pl08x_issue_pending;
pl08x->slave.device_prep_slave_sg = pl08x_prep_slave_sg;
......@@ -2301,8 +2804,11 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
pl08x->slave.device_terminate_all = pl08x_terminate_all;
pl08x->slave.src_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->slave.dst_addr_widths = PL80X_DMA_BUSWIDTHS;
pl08x->slave.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
pl08x->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
pl08x->slave.directions =
BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
pl08x->slave.residue_granularity =
DMA_RESIDUE_GRANULARITY_SEGMENT;
}
/* Get the platform data */
pl08x->pd = dev_get_platdata(&adev->dev);
......@@ -2344,19 +2850,18 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
goto out_no_lli_pool;
}
pl08x->base = ioremap(adev->res.start, resource_size(&adev->res));
if (!pl08x->base) {
ret = -ENOMEM;
goto out_no_ioremap;
}
/* Turn on the PL08x */
pl08x_ensure_on(pl08x);
/* Attach the interrupt handler */
/* Clear any pending interrupts */
if (vd->ftdmac020)
/* This variant has error IRQs in bits 16-19 */
writel(0x0000FFFF, pl08x->base + PL080_ERR_CLEAR);
else
writel(0x000000FF, pl08x->base + PL080_ERR_CLEAR);
writel(0x000000FF, pl08x->base + PL080_TC_CLEAR);
/* Attach the interrupt handler */
ret = request_irq(adev->irq[0], pl08x_irq, 0, DRIVER_NAME, pl08x);
if (ret) {
dev_err(&adev->dev, "%s failed to request interrupt %d\n",
......@@ -2377,7 +2882,25 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
ch->id = i;
ch->base = pl08x->base + PL080_Cx_BASE(i);
if (vd->ftdmac020) {
/* FTDMA020 has a special channel busy register */
ch->reg_busy = ch->base + FTDMAC020_CH_BUSY;
ch->reg_config = ch->base + FTDMAC020_CH_CFG;
ch->reg_control = ch->base + FTDMAC020_CH_CSR;
ch->reg_src = ch->base + FTDMAC020_CH_SRC_ADDR;
ch->reg_dst = ch->base + FTDMAC020_CH_DST_ADDR;
ch->reg_lli = ch->base + FTDMAC020_CH_LLP;
ch->ftdmac020 = true;
} else {
ch->reg_config = ch->base + vd->config_offset;
ch->reg_control = ch->base + PL080_CH_CONTROL;
ch->reg_src = ch->base + PL080_CH_SRC_ADDR;
ch->reg_dst = ch->base + PL080_CH_DST_ADDR;
ch->reg_lli = ch->base + PL080_CH_LLI;
}
if (vd->pl080s)
ch->pl080s = true;
spin_lock_init(&ch->lock);
/*
......@@ -2410,6 +2933,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
}
/* Register slave channels */
if (pl08x->has_slave) {
ret = pl08x_dma_init_virtual_channels(pl08x, &pl08x->slave,
pl08x->pd->num_slave_channels, true);
if (ret < 0) {
......@@ -2418,6 +2942,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
__func__, ret);
goto out_no_slave;
}
}
ret = dma_async_device_register(&pl08x->memcpy);
if (ret) {
......@@ -2427,6 +2952,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
goto out_no_memcpy_reg;
}
if (pl08x->has_slave) {
ret = dma_async_device_register(&pl08x->slave);
if (ret) {
dev_warn(&pl08x->adev->dev,
......@@ -2434,6 +2960,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
__func__, ret);
goto out_no_slave_reg;
}
}
amba_set_drvdata(adev, pl08x);
init_pl08x_debugfs(pl08x);
......@@ -2446,6 +2973,7 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
out_no_slave_reg:
dma_async_device_unregister(&pl08x->memcpy);
out_no_memcpy_reg:
if (pl08x->has_slave)
pl08x_free_virtual_channels(&pl08x->slave);
out_no_slave:
pl08x_free_virtual_channels(&pl08x->memcpy);
......@@ -2454,11 +2982,11 @@ static int pl08x_probe(struct amba_device *adev, const struct amba_id *id)
out_no_phychans:
free_irq(adev->irq[0], pl08x);
out_no_irq:
iounmap(pl08x->base);
out_no_ioremap:
dma_pool_destroy(pl08x->pool);
out_no_lli_pool:
out_no_platdata:
iounmap(pl08x->base);
out_no_ioremap:
kfree(pl08x);
out_no_pl08x:
amba_release_regions(adev);
......@@ -2499,6 +3027,12 @@ static struct vendor_data vendor_pl081 = {
.max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK,
};
static struct vendor_data vendor_ftdmac020 = {
.config_offset = PL080_CH_CONFIG,
.ftdmac020 = true,
.max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK,
};
static struct amba_id pl08x_ids[] = {
/* Samsung PL080S variant */
{
......@@ -2524,6 +3058,12 @@ static struct amba_id pl08x_ids[] = {
.mask = 0x00ffffff,
.data = &vendor_nomadik,
},
/* Faraday Technology FTDMAC020 */
{
.id = 0x0003b080,
.mask = 0x000fffff,
.data = &vendor_ftdmac020,
},
{ 0, 0 },
};
......
drivers/dma/bcm-sba-raid.c 0 → 100644
View file @ 2ceedf97
/*
* Copyright (C) 2017 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Broadcom SBA RAID Driver
*
* The Broadcom stream buffer accelerator (SBA) provides offloading
* capabilities for RAID operations. The SBA offload engine is accessible
* via Broadcom SoC specific ring manager. Two or more offload engines
* can share same Broadcom SoC specific ring manager due to this Broadcom
* SoC specific ring manager driver is implemented as a mailbox controller
* driver and offload engine drivers are implemented as mallbox clients.
*
* Typically, Broadcom SoC specific ring manager will implement larger
* number of hardware rings over one or more SBA hardware devices. By
* design, the internal buffer size of SBA hardware device is limited
* but all offload operations supported by SBA can be broken down into
* multiple small size requests and executed parallely on multiple SBA
* hardware devices for achieving high through-put.
*
* The Broadcom SBA RAID driver does not require any register programming
* except submitting request to SBA hardware device via mailbox channels.
* This driver implements a DMA device with one DMA channel using a set
* of mailbox channels provided by Broadcom SoC specific ring manager
* driver. To exploit parallelism (as described above), all DMA request
* coming to SBA RAID DMA channel are broken down to smaller requests
* and submitted to multiple mailbox channels in round-robin fashion.
* For having more SBA DMA channels, we can create more SBA device nodes
* in Broadcom SoC specific DTS based on number of hardware rings supported
* by Broadcom SoC ring manager.
*/
#include <linux/bitops.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/list.h>
#include <linux/mailbox_client.h>
#include <linux/mailbox/brcm-message.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/slab.h>
#include <linux/raid/pq.h>
#include "dmaengine.h"
/* SBA command related defines */
#define SBA_TYPE_SHIFT 48
#define SBA_TYPE_MASK GENMASK(1, 0)
#define SBA_TYPE_A 0x0
#define SBA_TYPE_B 0x2
#define SBA_TYPE_C 0x3
#define SBA_USER_DEF_SHIFT 32
#define SBA_USER_DEF_MASK GENMASK(15, 0)
#define SBA_R_MDATA_SHIFT 24
#define SBA_R_MDATA_MASK GENMASK(7, 0)
#define SBA_C_MDATA_MS_SHIFT 18
#define SBA_C_MDATA_MS_MASK GENMASK(1, 0)
#define SBA_INT_SHIFT 17
#define SBA_INT_MASK BIT(0)
#define SBA_RESP_SHIFT 16
#define SBA_RESP_MASK BIT(0)
#define SBA_C_MDATA_SHIFT 8
#define SBA_C_MDATA_MASK GENMASK(7, 0)
#define SBA_C_MDATA_BNUMx_SHIFT(__bnum) (2 * (__bnum))
#define SBA_C_MDATA_BNUMx_MASK GENMASK(1, 0)
#define SBA_C_MDATA_DNUM_SHIFT 5
#define SBA_C_MDATA_DNUM_MASK GENMASK(4, 0)
#define SBA_C_MDATA_LS(__v) ((__v) & 0xff)
#define SBA_C_MDATA_MS(__v) (((__v) >> 8) & 0x3)
#define SBA_CMD_SHIFT 0
#define SBA_CMD_MASK GENMASK(3, 0)
#define SBA_CMD_ZERO_BUFFER 0x4
#define SBA_CMD_ZERO_ALL_BUFFERS 0x8
#define SBA_CMD_LOAD_BUFFER 0x9
#define SBA_CMD_XOR 0xa
#define SBA_CMD_GALOIS_XOR 0xb
#define SBA_CMD_WRITE_BUFFER 0xc
#define SBA_CMD_GALOIS 0xe
/* Driver helper macros */
#define to_sba_request(tx) \
container_of(tx, struct sba_request, tx)
#define to_sba_device(dchan) \
container_of(dchan, struct sba_device, dma_chan)
enum sba_request_state {
SBA_REQUEST_STATE_FREE = 1,
SBA_REQUEST_STATE_ALLOCED = 2,
SBA_REQUEST_STATE_PENDING = 3,
SBA_REQUEST_STATE_ACTIVE = 4,
SBA_REQUEST_STATE_RECEIVED = 5,
SBA_REQUEST_STATE_COMPLETED = 6,
SBA_REQUEST_STATE_ABORTED = 7,
};
struct sba_request {
/* Global state */
struct list_head node;
struct sba_device *sba;
enum sba_request_state state;
bool fence;
/* Chained requests management */
struct sba_request *first;
struct list_head next;
unsigned int next_count;
atomic_t next_pending_count;
/* BRCM message data */
void *resp;
dma_addr_t resp_dma;
struct brcm_sba_command *cmds;
struct brcm_message msg;
struct dma_async_tx_descriptor tx;
};
enum sba_version {
SBA_VER_1 = 0,
SBA_VER_2
};
struct sba_device {
/* Underlying device */
struct device *dev;
/* DT configuration parameters */
enum sba_version ver;
/* Derived configuration parameters */
u32 max_req;
u32 hw_buf_size;
u32 hw_resp_size;
u32 max_pq_coefs;
u32 max_pq_srcs;
u32 max_cmd_per_req;
u32 max_xor_srcs;
u32 max_resp_pool_size;
u32 max_cmds_pool_size;
/* Maibox client and Mailbox channels */
struct mbox_client client;
int mchans_count;
atomic_t mchans_current;
struct mbox_chan **mchans;
struct device *mbox_dev;
/* DMA device and DMA channel */
struct dma_device dma_dev;
struct dma_chan dma_chan;
/* DMA channel resources */
void *resp_base;
dma_addr_t resp_dma_base;
void *cmds_base;
dma_addr_t cmds_dma_base;
spinlock_t reqs_lock;
struct sba_request *reqs;
bool reqs_fence;
struct list_head reqs_alloc_list;
struct list_head reqs_pending_list;
struct list_head reqs_active_list;
struct list_head reqs_received_list;
struct list_head reqs_completed_list;
struct list_head reqs_aborted_list;
struct list_head reqs_free_list;
int reqs_free_count;
};
/* ====== SBA command helper routines ===== */
static inline u64 __pure sba_cmd_enc(u64 cmd, u32 val, u32 shift, u32 mask)
{
cmd &= ~((u64)mask << shift);
cmd |= ((u64)(val & mask) << shift);
return cmd;
}
static inline u32 __pure sba_cmd_load_c_mdata(u32 b0)
{
return b0 & SBA_C_MDATA_BNUMx_MASK;
}
static inline u32 __pure sba_cmd_write_c_mdata(u32 b0)
{
return b0 & SBA_C_MDATA_BNUMx_MASK;
}
static inline u32 __pure sba_cmd_xor_c_mdata(u32 b1, u32 b0)
{
return (b0 & SBA_C_MDATA_BNUMx_MASK) |
((b1 & SBA_C_MDATA_BNUMx_MASK) << SBA_C_MDATA_BNUMx_SHIFT(1));
}
static inline u32 __pure sba_cmd_pq_c_mdata(u32 d, u32 b1, u32 b0)
{
return (b0 & SBA_C_MDATA_BNUMx_MASK) |
((b1 & SBA_C_MDATA_BNUMx_MASK) << SBA_C_MDATA_BNUMx_SHIFT(1)) |
((d & SBA_C_MDATA_DNUM_MASK) << SBA_C_MDATA_DNUM_SHIFT);
}
/* ====== Channel resource management routines ===== */
static struct sba_request *sba_alloc_request(struct sba_device *sba)
{
unsigned long flags;
struct sba_request *req = NULL;
spin_lock_irqsave(&sba->reqs_lock, flags);
req = list_first_entry_or_null(&sba->reqs_free_list,
struct sba_request, node);
if (req) {
list_move_tail(&req->node, &sba->reqs_alloc_list);
req->state = SBA_REQUEST_STATE_ALLOCED;
req->fence = false;
req->first = req;
INIT_LIST_HEAD(&req->next);
req->next_count = 1;
atomic_set(&req->next_pending_count, 1);
sba->reqs_free_count--;
dma_async_tx_descriptor_init(&req->tx, &sba->dma_chan);
}
spin_unlock_irqrestore(&sba->reqs_lock, flags);
return req;
}
/* Note: Must be called with sba->reqs_lock held */
static void _sba_pending_request(struct sba_device *sba,
struct sba_request *req)
{
lockdep_assert_held(&sba->reqs_lock);
req->state = SBA_REQUEST_STATE_PENDING;
list_move_tail(&req->node, &sba->reqs_pending_list);
if (list_empty(&sba->reqs_active_list))
sba->reqs_fence = false;
}
/* Note: Must be called with sba->reqs_lock held */
static bool _sba_active_request(struct sba_device *sba,
struct sba_request *req)
{
lockdep_assert_held(&sba->reqs_lock);
if (list_empty(&sba->reqs_active_list))
sba->reqs_fence = false;
if (sba->reqs_fence)
return false;
req->state = SBA_REQUEST_STATE_ACTIVE;
list_move_tail(&req->node, &sba->reqs_active_list);
if (req->fence)
sba->reqs_fence = true;
return true;
}
/* Note: Must be called with sba->reqs_lock held */
static void _sba_abort_request(struct sba_device *sba,
struct sba_request *req)
{
lockdep_assert_held(&sba->reqs_lock);
req->state = SBA_REQUEST_STATE_ABORTED;
list_move_tail(&req->node, &sba->reqs_aborted_list);
if (list_empty(&sba->reqs_active_list))
sba->reqs_fence = false;
}
/* Note: Must be called with sba->reqs_lock held */
static void _sba_free_request(struct sba_device *sba,
struct sba_request *req)
{
lockdep_assert_held(&sba->reqs_lock);
req->state = SBA_REQUEST_STATE_FREE;
list_move_tail(&req->node, &sba->reqs_free_list);
if (list_empty(&sba->reqs_active_list))
sba->reqs_fence = false;
sba->reqs_free_count++;
}
static void sba_received_request(struct sba_request *req)
{
unsigned long flags;
struct sba_device *sba = req->sba;
spin_lock_irqsave(&sba->reqs_lock, flags);
req->state = SBA_REQUEST_STATE_RECEIVED;
list_move_tail(&req->node, &sba->reqs_received_list);
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static void sba_complete_chained_requests(struct sba_request *req)
{
unsigned long flags;
struct sba_request *nreq;
struct sba_device *sba = req->sba;
spin_lock_irqsave(&sba->reqs_lock, flags);
req->state = SBA_REQUEST_STATE_COMPLETED;
list_move_tail(&req->node, &sba->reqs_completed_list);
list_for_each_entry(nreq, &req->next, next) {
nreq->state = SBA_REQUEST_STATE_COMPLETED;
list_move_tail(&nreq->node, &sba->reqs_completed_list);
}
if (list_empty(&sba->reqs_active_list))
sba->reqs_fence = false;
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static void sba_free_chained_requests(struct sba_request *req)
{
unsigned long flags;
struct sba_request *nreq;
struct sba_device *sba = req->sba;
spin_lock_irqsave(&sba->reqs_lock, flags);
_sba_free_request(sba, req);
list_for_each_entry(nreq, &req->next, next)
_sba_free_request(sba, nreq);
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static void sba_chain_request(struct sba_request *first,
struct sba_request *req)
{
unsigned long flags;
struct sba_device *sba = req->sba;
spin_lock_irqsave(&sba->reqs_lock, flags);
list_add_tail(&req->next, &first->next);
req->first = first;
first->next_count++;
atomic_set(&first->next_pending_count, first->next_count);
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static void sba_cleanup_nonpending_requests(struct sba_device *sba)
{
unsigned long flags;
struct sba_request *req, *req1;
spin_lock_irqsave(&sba->reqs_lock, flags);
/* Freeup all alloced request */
list_for_each_entry_safe(req, req1, &sba->reqs_alloc_list, node)
_sba_free_request(sba, req);
/* Freeup all received request */
list_for_each_entry_safe(req, req1, &sba->reqs_received_list, node)
_sba_free_request(sba, req);
/* Freeup all completed request */
list_for_each_entry_safe(req, req1, &sba->reqs_completed_list, node)
_sba_free_request(sba, req);
/* Set all active requests as aborted */
list_for_each_entry_safe(req, req1, &sba->reqs_active_list, node)
_sba_abort_request(sba, req);
/*
* Note: We expect that aborted request will be eventually
* freed by sba_receive_message()
*/
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static void sba_cleanup_pending_requests(struct sba_device *sba)
{
unsigned long flags;
struct sba_request *req, *req1;
spin_lock_irqsave(&sba->reqs_lock, flags);
/* Freeup all pending request */
list_for_each_entry_safe(req, req1, &sba->reqs_pending_list, node)
_sba_free_request(sba, req);
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
/* ====== DMAENGINE callbacks ===== */
static void sba_free_chan_resources(struct dma_chan *dchan)
{
/*
* Channel resources are pre-alloced so we just free-up
* whatever we can so that we can re-use pre-alloced
* channel resources next time.
*/
sba_cleanup_nonpending_requests(to_sba_device(dchan));
}
static int sba_device_terminate_all(struct dma_chan *dchan)
{
/* Cleanup all pending requests */
sba_cleanup_pending_requests(to_sba_device(dchan));
return 0;
}
static int sba_send_mbox_request(struct sba_device *sba,
struct sba_request *req)
{
int mchans_idx, ret = 0;
/* Select mailbox channel in round-robin fashion */
mchans_idx = atomic_inc_return(&sba->mchans_current);
mchans_idx = mchans_idx % sba->mchans_count;
/* Send message for the request */
req->msg.error = 0;
ret = mbox_send_message(sba->mchans[mchans_idx], &req->msg);
if (ret < 0) {
dev_err(sba->dev, "send message failed with error %d", ret);
return ret;
}
ret = req->msg.error;
if (ret < 0) {
dev_err(sba->dev, "message error %d", ret);
return ret;
}
return 0;
}
static void sba_issue_pending(struct dma_chan *dchan)
{
int ret;
unsigned long flags;
struct sba_request *req, *req1;
struct sba_device *sba = to_sba_device(dchan);
spin_lock_irqsave(&sba->reqs_lock, flags);
/* Process all pending request */
list_for_each_entry_safe(req, req1, &sba->reqs_pending_list, node) {
/* Try to make request active */
if (!_sba_active_request(sba, req))
break;
/* Send request to mailbox channel */
spin_unlock_irqrestore(&sba->reqs_lock, flags);
ret = sba_send_mbox_request(sba, req);
spin_lock_irqsave(&sba->reqs_lock, flags);
/* If something went wrong then keep request pending */
if (ret < 0) {
_sba_pending_request(sba, req);
break;
}
}
spin_unlock_irqrestore(&sba->reqs_lock, flags);
}
static dma_cookie_t sba_tx_submit(struct dma_async_tx_descriptor *tx)
{
unsigned long flags;
dma_cookie_t cookie;
struct sba_device *sba;
struct sba_request *req, *nreq;
if (unlikely(!tx))
return -EINVAL;
sba = to_sba_device(tx->chan);
req = to_sba_request(tx);
/* Assign cookie and mark all chained requests pending */
spin_lock_irqsave(&sba->reqs_lock, flags);
cookie = dma_cookie_assign(tx);
_sba_pending_request(sba, req);
list_for_each_entry(nreq, &req->next, next)
_sba_pending_request(sba, nreq);
spin_unlock_irqrestore(&sba->reqs_lock, flags);
return cookie;
}
static enum dma_status sba_tx_status(struct dma_chan *dchan,
dma_cookie_t cookie,
struct dma_tx_state *txstate)
{
int mchan_idx;
enum dma_status ret;
struct sba_device *sba = to_sba_device(dchan);
for (mchan_idx = 0; mchan_idx < sba->mchans_count; mchan_idx++)
mbox_client_peek_data(sba->mchans[mchan_idx]);
ret = dma_cookie_status(dchan, cookie, txstate);
if (ret == DMA_COMPLETE)
return ret;
return dma_cookie_status(dchan, cookie, txstate);
}
static void sba_fillup_interrupt_msg(struct sba_request *req,
struct brcm_sba_command *cmds,
struct brcm_message *msg)
{
u64 cmd;
u32 c_mdata;
struct brcm_sba_command *cmdsp = cmds;
/* Type-B command to load dummy data into buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, req->sba->hw_resp_size,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = req->resp_dma;
cmdsp->data_len = req->sba->hw_resp_size;
cmdsp++;
/* Type-A command to write buf0 to dummy location */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, req->sba->hw_resp_size,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = req->resp_dma;
cmdsp->data_len = req->sba->hw_resp_size;
cmdsp++;
/* Fillup brcm_message */
msg->type = BRCM_MESSAGE_SBA;
msg->sba.cmds = cmds;
msg->sba.cmds_count = cmdsp - cmds;
msg->ctx = req;
msg->error = 0;
}
static struct dma_async_tx_descriptor *
sba_prep_dma_interrupt(struct dma_chan *dchan, unsigned long flags)
{
struct sba_request *req = NULL;
struct sba_device *sba = to_sba_device(dchan);
/* Alloc new request */
req = sba_alloc_request(sba);
if (!req)
return NULL;
/*
* Force fence so that no requests are submitted
* until DMA callback for this request is invoked.
*/
req->fence = true;
/* Fillup request message */
sba_fillup_interrupt_msg(req, req->cmds, &req->msg);
/* Init async_tx descriptor */
req->tx.flags = flags;
req->tx.cookie = -EBUSY;
return &req->tx;
}
static void sba_fillup_memcpy_msg(struct sba_request *req,
struct brcm_sba_command *cmds,
struct brcm_message *msg,
dma_addr_t msg_offset, size_t msg_len,
dma_addr_t dst, dma_addr_t src)
{
u64 cmd;
u32 c_mdata;
struct brcm_sba_command *cmdsp = cmds;
/* Type-B command to load data into buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
/* Type-A command to write buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = dst + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
/* Fillup brcm_message */
msg->type = BRCM_MESSAGE_SBA;
msg->sba.cmds = cmds;
msg->sba.cmds_count = cmdsp - cmds;
msg->ctx = req;
msg->error = 0;
}
static struct sba_request *
sba_prep_dma_memcpy_req(struct sba_device *sba,
dma_addr_t off, dma_addr_t dst, dma_addr_t src,
size_t len, unsigned long flags)
{
struct sba_request *req = NULL;
/* Alloc new request */
req = sba_alloc_request(sba);
if (!req)
return NULL;
req->fence = (flags & DMA_PREP_FENCE) ? true : false;
/* Fillup request message */
sba_fillup_memcpy_msg(req, req->cmds, &req->msg,
off, len, dst, src);
/* Init async_tx descriptor */
req->tx.flags = flags;
req->tx.cookie = -EBUSY;
return req;
}
static struct dma_async_tx_descriptor *
sba_prep_dma_memcpy(struct dma_chan *dchan, dma_addr_t dst, dma_addr_t src,
size_t len, unsigned long flags)
{
size_t req_len;
dma_addr_t off = 0;
struct sba_device *sba = to_sba_device(dchan);
struct sba_request *first = NULL, *req;
/* Create chained requests where each request is upto hw_buf_size */
while (len) {
req_len = (len < sba->hw_buf_size) ? len : sba->hw_buf_size;
req = sba_prep_dma_memcpy_req(sba, off, dst, src,
req_len, flags);
if (!req) {
if (first)
sba_free_chained_requests(first);
return NULL;
}
if (first)
sba_chain_request(first, req);
else
first = req;
off += req_len;
len -= req_len;
}
return (first) ? &first->tx : NULL;
}
static void sba_fillup_xor_msg(struct sba_request *req,
struct brcm_sba_command *cmds,
struct brcm_message *msg,
dma_addr_t msg_offset, size_t msg_len,
dma_addr_t dst, dma_addr_t *src, u32 src_cnt)
{
u64 cmd;
u32 c_mdata;
unsigned int i;
struct brcm_sba_command *cmdsp = cmds;
/* Type-B command to load data into buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src[0] + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
/* Type-B commands to xor data with buf0 and put it back in buf0 */
for (i = 1; i < src_cnt; i++) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_xor_c_mdata(0, 0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_XOR,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src[i] + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-A command to write buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = dst + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
/* Fillup brcm_message */
msg->type = BRCM_MESSAGE_SBA;
msg->sba.cmds = cmds;
msg->sba.cmds_count = cmdsp - cmds;
msg->ctx = req;
msg->error = 0;
}
struct sba_request *
sba_prep_dma_xor_req(struct sba_device *sba,
dma_addr_t off, dma_addr_t dst, dma_addr_t *src,
u32 src_cnt, size_t len, unsigned long flags)
{
struct sba_request *req = NULL;
/* Alloc new request */
req = sba_alloc_request(sba);
if (!req)
return NULL;
req->fence = (flags & DMA_PREP_FENCE) ? true : false;
/* Fillup request message */
sba_fillup_xor_msg(req, req->cmds, &req->msg,
off, len, dst, src, src_cnt);
/* Init async_tx descriptor */
req->tx.flags = flags;
req->tx.cookie = -EBUSY;
return req;
}
static struct dma_async_tx_descriptor *
sba_prep_dma_xor(struct dma_chan *dchan, dma_addr_t dst, dma_addr_t *src,
u32 src_cnt, size_t len, unsigned long flags)
{
size_t req_len;
dma_addr_t off = 0;
struct sba_device *sba = to_sba_device(dchan);
struct sba_request *first = NULL, *req;
/* Sanity checks */
if (unlikely(src_cnt > sba->max_xor_srcs))
return NULL;
/* Create chained requests where each request is upto hw_buf_size */
while (len) {
req_len = (len < sba->hw_buf_size) ? len : sba->hw_buf_size;
req = sba_prep_dma_xor_req(sba, off, dst, src, src_cnt,
req_len, flags);
if (!req) {
if (first)
sba_free_chained_requests(first);
return NULL;
}
if (first)
sba_chain_request(first, req);
else
first = req;
off += req_len;
len -= req_len;
}
return (first) ? &first->tx : NULL;
}
static void sba_fillup_pq_msg(struct sba_request *req,
bool pq_continue,
struct brcm_sba_command *cmds,
struct brcm_message *msg,
dma_addr_t msg_offset, size_t msg_len,
dma_addr_t *dst_p, dma_addr_t *dst_q,
const u8 *scf, dma_addr_t *src, u32 src_cnt)
{
u64 cmd;
u32 c_mdata;
unsigned int i;
struct brcm_sba_command *cmdsp = cmds;
if (pq_continue) {
/* Type-B command to load old P into buf0 */
if (dst_p) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = *dst_p + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-B command to load old Q into buf1 */
if (dst_q) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(1);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = *dst_q + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
} else {
/* Type-A command to zero all buffers */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_ZERO_ALL_BUFFERS,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
cmdsp++;
}
/* Type-B commands for generate P onto buf0 and Q onto buf1 */
for (i = 0; i < src_cnt; i++) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_pq_c_mdata(raid6_gflog[scf[i]], 1, 0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_MS(c_mdata),
SBA_C_MDATA_MS_SHIFT, SBA_C_MDATA_MS_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_GALOIS_XOR,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src[i] + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-A command to write buf0 */
if (dst_p) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = *dst_p + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-A command to write buf1 */
if (dst_q) {
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(1);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = *dst_q + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Fillup brcm_message */
msg->type = BRCM_MESSAGE_SBA;
msg->sba.cmds = cmds;
msg->sba.cmds_count = cmdsp - cmds;
msg->ctx = req;
msg->error = 0;
}
struct sba_request *
sba_prep_dma_pq_req(struct sba_device *sba, dma_addr_t off,
dma_addr_t *dst_p, dma_addr_t *dst_q, dma_addr_t *src,
u32 src_cnt, const u8 *scf, size_t len, unsigned long flags)
{
struct sba_request *req = NULL;
/* Alloc new request */
req = sba_alloc_request(sba);
if (!req)
return NULL;
req->fence = (flags & DMA_PREP_FENCE) ? true : false;
/* Fillup request messages */
sba_fillup_pq_msg(req, dmaf_continue(flags),
req->cmds, &req->msg,
off, len, dst_p, dst_q, scf, src, src_cnt);
/* Init async_tx descriptor */
req->tx.flags = flags;
req->tx.cookie = -EBUSY;
return req;
}
static void sba_fillup_pq_single_msg(struct sba_request *req,
bool pq_continue,
struct brcm_sba_command *cmds,
struct brcm_message *msg,
dma_addr_t msg_offset, size_t msg_len,
dma_addr_t *dst_p, dma_addr_t *dst_q,
dma_addr_t src, u8 scf)
{
u64 cmd;
u32 c_mdata;
u8 pos, dpos = raid6_gflog[scf];
struct brcm_sba_command *cmdsp = cmds;
if (!dst_p)
goto skip_p;
if (pq_continue) {
/* Type-B command to load old P into buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = *dst_p + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
/*
* Type-B commands to xor data with buf0 and put it
* back in buf0
*/
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_xor_c_mdata(0, 0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_XOR,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
} else {
/* Type-B command to load old P into buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_load_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_LOAD_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-A command to write buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = *dst_p + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
skip_p:
if (!dst_q)
goto skip_q;
/* Type-A command to zero all buffers */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_ZERO_ALL_BUFFERS,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
cmdsp++;
if (dpos == 255)
goto skip_q_computation;
pos = (dpos < req->sba->max_pq_coefs) ?
dpos : (req->sba->max_pq_coefs - 1);
/*
* Type-B command to generate initial Q from data
* and store output into buf0
*/
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_pq_c_mdata(pos, 0, 0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_MS(c_mdata),
SBA_C_MDATA_MS_SHIFT, SBA_C_MDATA_MS_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_GALOIS,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = src + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
dpos -= pos;
/* Multiple Type-A command to generate final Q */
while (dpos) {
pos = (dpos < req->sba->max_pq_coefs) ?
dpos : (req->sba->max_pq_coefs - 1);
/*
* Type-A command to generate Q with buf0 and
* buf1 store result in buf0
*/
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_pq_c_mdata(pos, 0, 1);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_MS(c_mdata),
SBA_C_MDATA_MS_SHIFT, SBA_C_MDATA_MS_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_GALOIS,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
cmdsp++;
dpos -= pos;
}
skip_q_computation:
if (pq_continue) {
/*
* Type-B command to XOR previous output with
* buf0 and write it into buf0
*/
cmd = sba_cmd_enc(0x0, SBA_TYPE_B,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
c_mdata = sba_cmd_xor_c_mdata(0, 0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_XOR,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_B;
cmdsp->data = *dst_q + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
}
/* Type-A command to write buf0 */
cmd = sba_cmd_enc(0x0, SBA_TYPE_A,
SBA_TYPE_SHIFT, SBA_TYPE_MASK);
cmd = sba_cmd_enc(cmd, msg_len,
SBA_USER_DEF_SHIFT, SBA_USER_DEF_MASK);
cmd = sba_cmd_enc(cmd, 0x1,
SBA_RESP_SHIFT, SBA_RESP_MASK);
c_mdata = sba_cmd_write_c_mdata(0);
cmd = sba_cmd_enc(cmd, SBA_C_MDATA_LS(c_mdata),
SBA_C_MDATA_SHIFT, SBA_C_MDATA_MASK);
cmd = sba_cmd_enc(cmd, SBA_CMD_WRITE_BUFFER,
SBA_CMD_SHIFT, SBA_CMD_MASK);
cmdsp->cmd = cmd;
*cmdsp->cmd_dma = cpu_to_le64(cmd);
cmdsp->flags = BRCM_SBA_CMD_TYPE_A;
if (req->sba->hw_resp_size) {
cmdsp->flags |= BRCM_SBA_CMD_HAS_RESP;
cmdsp->resp = req->resp_dma;
cmdsp->resp_len = req->sba->hw_resp_size;
}
cmdsp->flags |= BRCM_SBA_CMD_HAS_OUTPUT;
cmdsp->data = *dst_q + msg_offset;
cmdsp->data_len = msg_len;
cmdsp++;
skip_q:
/* Fillup brcm_message */
msg->type = BRCM_MESSAGE_SBA;
msg->sba.cmds = cmds;
msg->sba.cmds_count = cmdsp - cmds;
msg->ctx = req;
msg->error = 0;
}
struct sba_request *
sba_prep_dma_pq_single_req(struct sba_device *sba, dma_addr_t off,
dma_addr_t *dst_p, dma_addr_t *dst_q,
dma_addr_t src, u8 scf, size_t len,
unsigned long flags)
{
struct sba_request *req = NULL;
/* Alloc new request */
req = sba_alloc_request(sba);
if (!req)
return NULL;
req->fence = (flags & DMA_PREP_FENCE) ? true : false;
/* Fillup request messages */
sba_fillup_pq_single_msg(req, dmaf_continue(flags),
req->cmds, &req->msg, off, len,
dst_p, dst_q, src, scf);
/* Init async_tx descriptor */
req->tx.flags = flags;
req->tx.cookie = -EBUSY;
return req;
}
static struct dma_async_tx_descriptor *
sba_prep_dma_pq(struct dma_chan *dchan, dma_addr_t *dst, dma_addr_t *src,
u32 src_cnt, const u8 *scf, size_t len, unsigned long flags)
{
u32 i, dst_q_index;
size_t req_len;
bool slow = false;
dma_addr_t off = 0;
dma_addr_t *dst_p = NULL, *dst_q = NULL;
struct sba_device *sba = to_sba_device(dchan);
struct sba_request *first = NULL, *req;
/* Sanity checks */
if (unlikely(src_cnt > sba->max_pq_srcs))
return NULL;
for (i = 0; i < src_cnt; i++)
if (sba->max_pq_coefs <= raid6_gflog[scf[i]])
slow = true;
/* Figure-out P and Q destination addresses */
if (!(flags & DMA_PREP_PQ_DISABLE_P))
dst_p = &dst[0];
if (!(flags & DMA_PREP_PQ_DISABLE_Q))
dst_q = &dst[1];
/* Create chained requests where each request is upto hw_buf_size */
while (len) {
req_len = (len < sba->hw_buf_size) ? len : sba->hw_buf_size;
if (slow) {
dst_q_index = src_cnt;
if (dst_q) {
for (i = 0; i < src_cnt; i++) {
if (*dst_q == src[i]) {
dst_q_index = i;
break;
}
}
}
if (dst_q_index < src_cnt) {
i = dst_q_index;
req = sba_prep_dma_pq_single_req(sba,
off, dst_p, dst_q, src[i], scf[i],
req_len, flags | DMA_PREP_FENCE);
if (!req)
goto fail;
if (first)
sba_chain_request(first, req);
else
first = req;
flags |= DMA_PREP_CONTINUE;
}
for (i = 0; i < src_cnt; i++) {
if (dst_q_index == i)
continue;
req = sba_prep_dma_pq_single_req(sba,
off, dst_p, dst_q, src[i], scf[i],
req_len, flags | DMA_PREP_FENCE);
if (!req)
goto fail;
if (first)
sba_chain_request(first, req);
else
first = req;
flags |= DMA_PREP_CONTINUE;
}
} else {
req = sba_prep_dma_pq_req(sba, off,
dst_p, dst_q, src, src_cnt,
scf, req_len, flags);
if (!req)
goto fail;
if (first)
sba_chain_request(first, req);
else
first = req;
}
off += req_len;
len -= req_len;
}
return (first) ? &first->tx : NULL;
fail:
if (first)
sba_free_chained_requests(first);
return NULL;
}
/* ====== Mailbox callbacks ===== */
static void sba_dma_tx_actions(struct sba_request *req)
{
struct dma_async_tx_descriptor *tx = &req->tx;
WARN_ON(tx->cookie < 0);
if (tx->cookie > 0) {
dma_cookie_complete(tx);
/*
* Call the callback (must not sleep or submit new
* operations to this channel)
*/
if (tx->callback)
tx->callback(tx->callback_param);
dma_descriptor_unmap(tx);
}
/* Run dependent operations */
dma_run_dependencies(tx);
/* If waiting for 'ack' then move to completed list */
if (!async_tx_test_ack(&req->tx))
sba_complete_chained_requests(req);
else
sba_free_chained_requests(req);
}
static void sba_receive_message(struct mbox_client *cl, void *msg)
{
unsigned long flags;
struct brcm_message *m = msg;
struct sba_request *req = m->ctx, *req1;
struct sba_device *sba = req->sba;
/* Error count if message has error */
if (m->error < 0)
dev_err(sba->dev, "%s got message with error %d",
dma_chan_name(&sba->dma_chan), m->error);
/* Mark request as received */
sba_received_request(req);
/* Wait for all chained requests to be completed */
if (atomic_dec_return(&req->first->next_pending_count))
goto done;
/* Point to first request */
req = req->first;
/* Update request */
if (req->state == SBA_REQUEST_STATE_RECEIVED)
sba_dma_tx_actions(req);
else
sba_free_chained_requests(req);
spin_lock_irqsave(&sba->reqs_lock, flags);
/* Re-check all completed request waiting for 'ack' */
list_for_each_entry_safe(req, req1, &sba->reqs_completed_list, node) {
spin_unlock_irqrestore(&sba->reqs_lock, flags);
sba_dma_tx_actions(req);
spin_lock_irqsave(&sba->reqs_lock, flags);
}
spin_unlock_irqrestore(&sba->reqs_lock, flags);
done:
/* Try to submit pending request */
sba_issue_pending(&sba->dma_chan);
}
/* ====== Platform driver routines ===== */
static int sba_prealloc_channel_resources(struct sba_device *sba)
{
int i, j, p, ret = 0;
struct sba_request *req = NULL;
sba->resp_base = dma_alloc_coherent(sba->dma_dev.dev,
sba->max_resp_pool_size,
&sba->resp_dma_base, GFP_KERNEL);
if (!sba->resp_base)
return -ENOMEM;
sba->cmds_base = dma_alloc_coherent(sba->dma_dev.dev,
sba->max_cmds_pool_size,
&sba->cmds_dma_base, GFP_KERNEL);
if (!sba->cmds_base) {
ret = -ENOMEM;
goto fail_free_resp_pool;
}
spin_lock_init(&sba->reqs_lock);
sba->reqs_fence = false;
INIT_LIST_HEAD(&sba->reqs_alloc_list);
INIT_LIST_HEAD(&sba->reqs_pending_list);
INIT_LIST_HEAD(&sba->reqs_active_list);
INIT_LIST_HEAD(&sba->reqs_received_list);
INIT_LIST_HEAD(&sba->reqs_completed_list);
INIT_LIST_HEAD(&sba->reqs_aborted_list);
INIT_LIST_HEAD(&sba->reqs_free_list);
sba->reqs = devm_kcalloc(sba->dev, sba->max_req,
sizeof(*req), GFP_KERNEL);
if (!sba->reqs) {
ret = -ENOMEM;
goto fail_free_cmds_pool;
}
for (i = 0, p = 0; i < sba->max_req; i++) {
req = &sba->reqs[i];
INIT_LIST_HEAD(&req->node);
req->sba = sba;
req->state = SBA_REQUEST_STATE_FREE;
INIT_LIST_HEAD(&req->next);
req->next_count = 1;
atomic_set(&req->next_pending_count, 0);
req->fence = false;
req->resp = sba->resp_base + p;
req->resp_dma = sba->resp_dma_base + p;
p += sba->hw_resp_size;
req->cmds = devm_kcalloc(sba->dev, sba->max_cmd_per_req,
sizeof(*req->cmds), GFP_KERNEL);
if (!req->cmds) {
ret = -ENOMEM;
goto fail_free_cmds_pool;
}
for (j = 0; j < sba->max_cmd_per_req; j++) {
req->cmds[j].cmd = 0;
req->cmds[j].cmd_dma = sba->cmds_base +
(i * sba->max_cmd_per_req + j) * sizeof(u64);
req->cmds[j].cmd_dma_addr = sba->cmds_dma_base +
(i * sba->max_cmd_per_req + j) * sizeof(u64);
req->cmds[j].flags = 0;
}
memset(&req->msg, 0, sizeof(req->msg));
dma_async_tx_descriptor_init(&req->tx, &sba->dma_chan);
req->tx.tx_submit = sba_tx_submit;
req->tx.phys = req->resp_dma;
list_add_tail(&req->node, &sba->reqs_free_list);
}
sba->reqs_free_count = sba->max_req;
return 0;
fail_free_cmds_pool:
dma_free_coherent(sba->dma_dev.dev,
sba->max_cmds_pool_size,
sba->cmds_base, sba->cmds_dma_base);
fail_free_resp_pool:
dma_free_coherent(sba->dma_dev.dev,
sba->max_resp_pool_size,
sba->resp_base, sba->resp_dma_base);
return ret;
}
static void sba_freeup_channel_resources(struct sba_device *sba)
{
dmaengine_terminate_all(&sba->dma_chan);
dma_free_coherent(sba->dma_dev.dev, sba->max_cmds_pool_size,
sba->cmds_base, sba->cmds_dma_base);
dma_free_coherent(sba->dma_dev.dev, sba->max_resp_pool_size,
sba->resp_base, sba->resp_dma_base);
sba->resp_base = NULL;
sba->resp_dma_base = 0;
}
static int sba_async_register(struct sba_device *sba)
{
int ret;
struct dma_device *dma_dev = &sba->dma_dev;
/* Initialize DMA channel cookie */
sba->dma_chan.device = dma_dev;
dma_cookie_init(&sba->dma_chan);
/* Initialize DMA device capability mask */
dma_cap_zero(dma_dev->cap_mask);
dma_cap_set(DMA_INTERRUPT, dma_dev->cap_mask);
dma_cap_set(DMA_MEMCPY, dma_dev->cap_mask);
dma_cap_set(DMA_XOR, dma_dev->cap_mask);
dma_cap_set(DMA_PQ, dma_dev->cap_mask);
/*
* Set mailbox channel device as the base device of
* our dma_device because the actual memory accesses
* will be done by mailbox controller
*/
dma_dev->dev = sba->mbox_dev;
/* Set base prep routines */
dma_dev->device_free_chan_resources = sba_free_chan_resources;
dma_dev->device_terminate_all = sba_device_terminate_all;
dma_dev->device_issue_pending = sba_issue_pending;
dma_dev->device_tx_status = sba_tx_status;
/* Set interrupt routine */
if (dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask))
dma_dev->device_prep_dma_interrupt = sba_prep_dma_interrupt;
/* Set memcpy routine */
if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask))
dma_dev->device_prep_dma_memcpy = sba_prep_dma_memcpy;
/* Set xor routine and capability */
if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
dma_dev->device_prep_dma_xor = sba_prep_dma_xor;
dma_dev->max_xor = sba->max_xor_srcs;
}
/* Set pq routine and capability */
if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
dma_dev->device_prep_dma_pq = sba_prep_dma_pq;
dma_set_maxpq(dma_dev, sba->max_pq_srcs, 0);
}
/* Initialize DMA device channel list */
INIT_LIST_HEAD(&dma_dev->channels);
list_add_tail(&sba->dma_chan.device_node, &dma_dev->channels);
/* Register with Linux async DMA framework*/
ret = dma_async_device_register(dma_dev);
if (ret) {
dev_err(sba->dev, "async device register error %d", ret);
return ret;
}
dev_info(sba->dev, "%s capabilities: %s%s%s%s\n",
dma_chan_name(&sba->dma_chan),
dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "interrupt " : "",
dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "memcpy " : "",
dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "",
dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "pq " : "");
return 0;
}
static int sba_probe(struct platform_device *pdev)
{
int i, ret = 0, mchans_count;
struct sba_device *sba;
struct platform_device *mbox_pdev;
struct of_phandle_args args;
/* Allocate main SBA struct */
sba = devm_kzalloc(&pdev->dev, sizeof(*sba), GFP_KERNEL);
if (!sba)
return -ENOMEM;
sba->dev = &pdev->dev;
platform_set_drvdata(pdev, sba);
/* Determine SBA version from DT compatible string */
if (of_device_is_compatible(sba->dev->of_node, "brcm,iproc-sba"))
sba->ver = SBA_VER_1;
else if (of_device_is_compatible(sba->dev->of_node,
"brcm,iproc-sba-v2"))
sba->ver = SBA_VER_2;
else
return -ENODEV;
/* Derived Configuration parameters */
switch (sba->ver) {
case SBA_VER_1:
sba->max_req = 1024;
sba->hw_buf_size = 4096;
sba->hw_resp_size = 8;
sba->max_pq_coefs = 6;
sba->max_pq_srcs = 6;
break;
case SBA_VER_2:
sba->max_req = 1024;
sba->hw_buf_size = 4096;
sba->hw_resp_size = 8;
sba->max_pq_coefs = 30;
/*
* We can support max_pq_srcs == max_pq_coefs because
* we are limited by number of SBA commands that we can
* fit in one message for underlying ring manager HW.
*/
sba->max_pq_srcs = 12;
break;
default:
return -EINVAL;
}
sba->max_cmd_per_req = sba->max_pq_srcs + 3;
sba->max_xor_srcs = sba->max_cmd_per_req - 1;
sba->max_resp_pool_size = sba->max_req * sba->hw_resp_size;
sba->max_cmds_pool_size = sba->max_req *
sba->max_cmd_per_req * sizeof(u64);
/* Setup mailbox client */
sba->client.dev = &pdev->dev;
sba->client.rx_callback = sba_receive_message;
sba->client.tx_block = false;
sba->client.knows_txdone = false;
sba->client.tx_tout = 0;
/* Number of channels equals number of mailbox channels */
ret = of_count_phandle_with_args(pdev->dev.of_node,
"mboxes", "#mbox-cells");
if (ret <= 0)
return -ENODEV;
mchans_count = ret;
sba->mchans_count = 0;
atomic_set(&sba->mchans_current, 0);
/* Allocate mailbox channel array */
sba->mchans = devm_kcalloc(&pdev->dev, sba->mchans_count,
sizeof(*sba->mchans), GFP_KERNEL);
if (!sba->mchans)
return -ENOMEM;
/* Request mailbox channels */
for (i = 0; i < mchans_count; i++) {
sba->mchans[i] = mbox_request_channel(&sba->client, i);
if (IS_ERR(sba->mchans[i])) {
ret = PTR_ERR(sba->mchans[i]);
goto fail_free_mchans;
}
sba->mchans_count++;
}
/* Find-out underlying mailbox device */
ret = of_parse_phandle_with_args(pdev->dev.of_node,
"mboxes", "#mbox-cells", 0, &args);
if (ret)
goto fail_free_mchans;
mbox_pdev = of_find_device_by_node(args.np);
of_node_put(args.np);
if (!mbox_pdev) {
ret = -ENODEV;
goto fail_free_mchans;
}
sba->mbox_dev = &mbox_pdev->dev;
/* All mailbox channels should be of same ring manager device */
for (i = 1; i < mchans_count; i++) {
ret = of_parse_phandle_with_args(pdev->dev.of_node,
"mboxes", "#mbox-cells", i, &args);
if (ret)
goto fail_free_mchans;
mbox_pdev = of_find_device_by_node(args.np);
of_node_put(args.np);
if (sba->mbox_dev != &mbox_pdev->dev) {
ret = -EINVAL;
goto fail_free_mchans;
}
}
/* Register DMA device with linux async framework */
ret = sba_async_register(sba);
if (ret)
goto fail_free_mchans;
/* Prealloc channel resource */
ret = sba_prealloc_channel_resources(sba);
if (ret)
goto fail_async_dev_unreg;
/* Print device info */
dev_info(sba->dev, "%s using SBAv%d and %d mailbox channels",
dma_chan_name(&sba->dma_chan), sba->ver+1,
sba->mchans_count);
return 0;
fail_async_dev_unreg:
dma_async_device_unregister(&sba->dma_dev);
fail_free_mchans:
for (i = 0; i < sba->mchans_count; i++)
mbox_free_channel(sba->mchans[i]);
return ret;
}
static int sba_remove(struct platform_device *pdev)
{
int i;
struct sba_device *sba = platform_get_drvdata(pdev);
sba_freeup_channel_resources(sba);
dma_async_device_unregister(&sba->dma_dev);
for (i = 0; i < sba->mchans_count; i++)
mbox_free_channel(sba->mchans[i]);
return 0;
}
static const struct of_device_id sba_of_match[] = {
{ .compatible = "brcm,iproc-sba", },
{ .compatible = "brcm,iproc-sba-v2", },
{},
};
MODULE_DEVICE_TABLE(of, sba_of_match);
static struct platform_driver sba_driver = {
.probe = sba_probe,
.remove = sba_remove,
.driver = {
.name = "bcm-sba-raid",
.of_match_table = sba_of_match,
},
};
module_platform_driver(sba_driver);
MODULE_DESCRIPTION("Broadcom SBA RAID driver");
MODULE_AUTHOR("Anup Patel <anup.patel@broadcom.com>");
MODULE_LICENSE("GPL v2");
drivers/dma/dw/platform.c
View file @ 2ceedf97
......@@ -306,8 +306,12 @@ static int dw_resume_early(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct dw_dma_chip *chip = platform_get_drvdata(pdev);
int ret;
ret = clk_prepare_enable(chip->clk);
if (ret)
return ret;
clk_prepare_enable(chip->clk);
return dw_dma_enable(chip);
}
......
drivers/dma/fsl_raid.c
View file @ 2ceedf97
......@@ -877,7 +877,7 @@ static int fsl_re_remove(struct platform_device *ofdev)
return 0;
}
static struct of_device_id fsl_re_ids[] = {
static const struct of_device_id fsl_re_ids[] = {
{ .compatible = "fsl,raideng-v1.0", },
{}
};
......
drivers/dma/fsldma.c
View file @ 2ceedf97
......@@ -269,6 +269,7 @@ static void fsl_chan_set_src_loop_size(struct fsldma_chan *chan, int size)
case 2:
case 4:
case 8:
mode &= ~FSL_DMA_MR_SAHTS_MASK;
mode |= FSL_DMA_MR_SAHE | (__ilog2(size) << 14);
break;
}
......@@ -301,6 +302,7 @@ static void fsl_chan_set_dst_loop_size(struct fsldma_chan *chan, int size)
case 2:
case 4:
case 8:
mode &= ~FSL_DMA_MR_DAHTS_MASK;
mode |= FSL_DMA_MR_DAHE | (__ilog2(size) << 16);
break;
}
......@@ -327,7 +329,8 @@ static void fsl_chan_set_request_count(struct fsldma_chan *chan, int size)
BUG_ON(size > 1024);
mode = get_mr(chan);
mode |= (__ilog2(size) << 24) & 0x0f000000;
mode &= ~FSL_DMA_MR_BWC_MASK;
mode |= (__ilog2(size) << 24) & FSL_DMA_MR_BWC_MASK;
set_mr(chan, mode);
}
......
drivers/dma/fsldma.h
View file @ 2ceedf97
......@@ -36,6 +36,10 @@
#define FSL_DMA_MR_DAHE 0x00002000
#define FSL_DMA_MR_SAHE 0x00001000
#define FSL_DMA_MR_SAHTS_MASK 0x0000C000
#define FSL_DMA_MR_DAHTS_MASK 0x00030000
#define FSL_DMA_MR_BWC_MASK 0x0f000000
/*
* Bandwidth/pause control determines how many bytes a given
* channel is allowed to transfer before the DMA engine pauses
......
drivers/dma/imx-dma.c
View file @ 2ceedf97
......@@ -888,7 +888,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
sg_init_table(imxdmac->sg_list, periods);
for (i = 0; i < periods; i++) {
imxdmac->sg_list[i].page_link = 0;
sg_assign_page(&imxdmac->sg_list[i], NULL);
imxdmac->sg_list[i].offset = 0;
imxdmac->sg_list[i].dma_address = dma_addr;
sg_dma_len(&imxdmac->sg_list[i]) = period_len;
......@@ -896,10 +896,7 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic(
}
/* close the loop */
imxdmac->sg_list[periods].offset = 0;
sg_dma_len(&imxdmac->sg_list[periods]) = 0;
imxdmac->sg_list[periods].page_link =
((unsigned long)imxdmac->sg_list | 0x01) & ~0x02;
sg_chain(imxdmac->sg_list, periods + 1, imxdmac->sg_list);
desc->type = IMXDMA_DESC_CYCLIC;
desc->sg = imxdmac->sg_list;
......
drivers/dma/imx-sdma.c
View file @ 2ceedf97
......@@ -1323,7 +1323,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
}
if (period_len > 0xffff) {
dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %d > %d\n",
dev_err(sdma->dev, "SDMA channel %d: maximum period size exceeded: %zu > %d\n",
channel, period_len, 0xffff);
goto err_out;
}
......@@ -1347,7 +1347,7 @@ static struct dma_async_tx_descriptor *sdma_prep_dma_cyclic(
if (i + 1 == num_periods)
param |= BD_WRAP;
dev_dbg(sdma->dev, "entry %d: count: %d dma: %#llx %s%s\n",
dev_dbg(sdma->dev, "entry %d: count: %zu dma: %#llx %s%s\n",
i, period_len, (u64)dma_addr,
param & BD_WRAP ? "wrap" : "",
param & BD_INTR ? " intr" : "");
......@@ -1755,19 +1755,26 @@ static int sdma_probe(struct platform_device *pdev)
if (IS_ERR(sdma->clk_ahb))
return PTR_ERR(sdma->clk_ahb);
clk_prepare(sdma->clk_ipg);
clk_prepare(sdma->clk_ahb);
ret = clk_prepare(sdma->clk_ipg);
if (ret)
return ret;
ret = clk_prepare(sdma->clk_ahb);
if (ret)
goto err_clk;
ret = devm_request_irq(&pdev->dev, irq, sdma_int_handler, 0, "sdma",
sdma);
if (ret)
return ret;
goto err_irq;
sdma->irq = irq;
sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
if (!sdma->script_addrs)
return -ENOMEM;
if (!sdma->script_addrs) {
ret = -ENOMEM;
goto err_irq;
}
/* initially no scripts available */
saddr_arr = (s32 *)sdma->script_addrs;
......@@ -1882,6 +1889,10 @@ static int sdma_probe(struct platform_device *pdev)
dma_async_device_unregister(&sdma->dma_device);
err_init:
kfree(sdma->script_addrs);
err_irq:
clk_unprepare(sdma->clk_ahb);
err_clk:
clk_unprepare(sdma->clk_ipg);
return ret;
}
......@@ -1893,6 +1904,8 @@ static int sdma_remove(struct platform_device *pdev)
devm_free_irq(&pdev->dev, sdma->irq, sdma);
dma_async_device_unregister(&sdma->dma_device);
kfree(sdma->script_addrs);
clk_unprepare(sdma->clk_ahb);
clk_unprepare(sdma->clk_ipg);
/* Kill the tasklet */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct sdma_channel *sdmac = &sdma->channel[i];
......
drivers/dma/ioat/dca.c
View file @ 2ceedf97
......@@ -336,8 +336,8 @@ struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase)
}
if (dca3_tag_map_invalid(ioatdca->tag_map)) {
WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND,
"%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n",
add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
pr_warn_once("%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n",
dev_driver_string(&pdev->dev),
dev_name(&pdev->dev));
free_dca_provider(dca);
......
drivers/dma/mv_xor_v2.c
View file @ 2ceedf97
......@@ -42,6 +42,7 @@
#define MV_XOR_V2_DMA_IMSG_THRD_OFF 0x018
#define MV_XOR_V2_DMA_IMSG_THRD_MASK 0x7FFF
#define MV_XOR_V2_DMA_IMSG_THRD_SHIFT 0x0
#define MV_XOR_V2_DMA_IMSG_TIMER_EN BIT(18)
#define MV_XOR_V2_DMA_DESQ_AWATTR_OFF 0x01C
/* Same flags as MV_XOR_V2_DMA_DESQ_ARATTR_OFF */
#define MV_XOR_V2_DMA_DESQ_ALLOC_OFF 0x04C
......@@ -55,6 +56,9 @@
#define MV_XOR_V2_DMA_DESQ_STOP_OFF 0x800
#define MV_XOR_V2_DMA_DESQ_DEALLOC_OFF 0x804
#define MV_XOR_V2_DMA_DESQ_ADD_OFF 0x808
#define MV_XOR_V2_DMA_IMSG_TMOT 0x810
#define MV_XOR_V2_DMA_IMSG_TIMER_THRD_MASK 0x1FFF
#define MV_XOR_V2_DMA_IMSG_TIMER_THRD_SHIFT 0
/* XOR Global registers */
#define MV_XOR_V2_GLOB_BW_CTRL 0x4
......@@ -90,6 +94,13 @@
*/
#define MV_XOR_V2_DESC_NUM 1024
/*
* Threshold values for descriptors and timeout, determined by
* experimentation as giving a good level of performance.
*/
#define MV_XOR_V2_DONE_IMSG_THRD 0x14
#define MV_XOR_V2_TIMER_THRD 0xB0
/**
* struct mv_xor_v2_descriptor - DMA HW descriptor
* @desc_id: used by S/W and is not affected by H/W.
......@@ -246,6 +257,29 @@ static int mv_xor_v2_set_desc_size(struct mv_xor_v2_device *xor_dev)
return MV_XOR_V2_EXT_DESC_SIZE;
}
/*
* Set the IMSG threshold
*/
static inline
void mv_xor_v2_enable_imsg_thrd(struct mv_xor_v2_device *xor_dev)
{
u32 reg;
/* Configure threshold of number of descriptors, and enable timer */
reg = readl(xor_dev->dma_base + MV_XOR_V2_DMA_IMSG_THRD_OFF);
reg &= (~MV_XOR_V2_DMA_IMSG_THRD_MASK << MV_XOR_V2_DMA_IMSG_THRD_SHIFT);
reg |= (MV_XOR_V2_DONE_IMSG_THRD << MV_XOR_V2_DMA_IMSG_THRD_SHIFT);
reg |= MV_XOR_V2_DMA_IMSG_TIMER_EN;
writel(reg, xor_dev->dma_base + MV_XOR_V2_DMA_IMSG_THRD_OFF);
/* Configure Timer Threshold */
reg = readl(xor_dev->dma_base + MV_XOR_V2_DMA_IMSG_TMOT);
reg &= (~MV_XOR_V2_DMA_IMSG_TIMER_THRD_MASK <<
MV_XOR_V2_DMA_IMSG_TIMER_THRD_SHIFT);
reg |= (MV_XOR_V2_TIMER_THRD << MV_XOR_V2_DMA_IMSG_TIMER_THRD_SHIFT);
writel(reg, xor_dev->dma_base + MV_XOR_V2_DMA_IMSG_TMOT);
}
static irqreturn_t mv_xor_v2_interrupt_handler(int irq, void *data)
{
struct mv_xor_v2_device *xor_dev = data;
......@@ -501,9 +535,6 @@ static void mv_xor_v2_issue_pending(struct dma_chan *chan)
mv_xor_v2_add_desc_to_desq(xor_dev, xor_dev->npendings);
xor_dev->npendings = 0;
/* Activate the channel */
writel(0, xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_STOP_OFF);
spin_unlock_bh(&xor_dev->lock);
}
......@@ -665,6 +696,27 @@ static int mv_xor_v2_descq_init(struct mv_xor_v2_device *xor_dev)
return 0;
}
static int mv_xor_v2_suspend(struct platform_device *dev, pm_message_t state)
{
struct mv_xor_v2_device *xor_dev = platform_get_drvdata(dev);
/* Set this bit to disable to stop the XOR unit. */
writel(0x1, xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_STOP_OFF);
return 0;
}
static int mv_xor_v2_resume(struct platform_device *dev)
{
struct mv_xor_v2_device *xor_dev = platform_get_drvdata(dev);
mv_xor_v2_set_desc_size(xor_dev);
mv_xor_v2_enable_imsg_thrd(xor_dev);
mv_xor_v2_descq_init(xor_dev);
return 0;
}
static int mv_xor_v2_probe(struct platform_device *pdev)
{
struct mv_xor_v2_device *xor_dev;
......@@ -795,6 +847,8 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
list_add_tail(&xor_dev->dmachan.device_node,
&dma_dev->channels);
mv_xor_v2_enable_imsg_thrd(xor_dev);
mv_xor_v2_descq_init(xor_dev);
ret = dma_async_device_register(dma_dev);
......@@ -844,6 +898,8 @@ MODULE_DEVICE_TABLE(of, mv_xor_v2_dt_ids);
static struct platform_driver mv_xor_v2_driver = {
.probe = mv_xor_v2_probe,
.suspend = mv_xor_v2_suspend,
.resume = mv_xor_v2_resume,
.remove = mv_xor_v2_remove,
.driver = {
.name = "mv_xor_v2",
......
drivers/dma/mxs-dma.c
View file @ 2ceedf97
......@@ -617,7 +617,7 @@ static struct dma_async_tx_descriptor *mxs_dma_prep_dma_cyclic(
if (period_len > MAX_XFER_BYTES) {
dev_err(mxs_dma->dma_device.dev,
"maximum period size exceeded: %d > %d\n",
"maximum period size exceeded: %zu > %d\n",
period_len, MAX_XFER_BYTES);
goto err_out;
}
......
drivers/dma/pl330.c
View file @ 2ceedf97
......@@ -443,7 +443,10 @@ struct dma_pl330_chan {
/* For D-to-M and M-to-D channels */
int burst_sz; /* the peripheral fifo width */
int burst_len; /* the number of burst */
dma_addr_t fifo_addr;
phys_addr_t fifo_addr;
/* DMA-mapped view of the FIFO; may differ if an IOMMU is present */
dma_addr_t fifo_dma;
enum dma_data_direction dir;
/* for cyclic capability */
bool cyclic;
......@@ -538,11 +541,6 @@ struct _xfer_spec {
struct dma_pl330_desc *desc;
};
static inline bool _queue_empty(struct pl330_thread *thrd)
{
return thrd->req[0].desc == NULL && thrd->req[1].desc == NULL;
}
static inline bool _queue_full(struct pl330_thread *thrd)
{
return thrd->req[0].desc != NULL && thrd->req[1].desc != NULL;
......@@ -564,23 +562,6 @@ static inline u32 get_revision(u32 periph_id)
return (periph_id >> PERIPH_REV_SHIFT) & PERIPH_REV_MASK;
}
static inline u32 _emit_ADDH(unsigned dry_run, u8 buf[],
enum pl330_dst da, u16 val)
{
if (dry_run)
return SZ_DMAADDH;
buf[0] = CMD_DMAADDH;
buf[0] |= (da << 1);
buf[1] = val;
buf[2] = val >> 8;
PL330_DBGCMD_DUMP(SZ_DMAADDH, "\tDMAADDH %s %u\n",
da == 1 ? "DA" : "SA", val);
return SZ_DMAADDH;
}
static inline u32 _emit_END(unsigned dry_run, u8 buf[])
{
if (dry_run)
......@@ -738,18 +719,6 @@ static inline u32 _emit_MOV(unsigned dry_run, u8 buf[],
return SZ_DMAMOV;
}
static inline u32 _emit_NOP(unsigned dry_run, u8 buf[])
{
if (dry_run)
return SZ_DMANOP;
buf[0] = CMD_DMANOP;
PL330_DBGCMD_DUMP(SZ_DMANOP, "\tDMANOP\n");
return SZ_DMANOP;
}
static inline u32 _emit_RMB(unsigned dry_run, u8 buf[])
{
if (dry_run)
......@@ -817,39 +786,6 @@ static inline u32 _emit_STP(unsigned dry_run, u8 buf[],
return SZ_DMASTP;
}
static inline u32 _emit_STZ(unsigned dry_run, u8 buf[])
{
if (dry_run)
return SZ_DMASTZ;
buf[0] = CMD_DMASTZ;
PL330_DBGCMD_DUMP(SZ_DMASTZ, "\tDMASTZ\n");
return SZ_DMASTZ;
}
static inline u32 _emit_WFE(unsigned dry_run, u8 buf[], u8 ev,
unsigned invalidate)
{
if (dry_run)
return SZ_DMAWFE;
buf[0] = CMD_DMAWFE;
ev &= 0x1f;
ev <<= 3;
buf[1] = ev;
if (invalidate)
buf[1] |= (1 << 1);
PL330_DBGCMD_DUMP(SZ_DMAWFE, "\tDMAWFE %u%s\n",
ev >> 3, invalidate ? ", I" : "");
return SZ_DMAWFE;
}
static inline u32 _emit_WFP(unsigned dry_run, u8 buf[],
enum pl330_cond cond, u8 peri)
{
......@@ -2120,11 +2056,60 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
return 1;
}
/*
* We need the data direction between the DMAC (the dma-mapping "device") and
* the FIFO (the dmaengine "dev"), from the FIFO's point of view. Confusing!
*/
static enum dma_data_direction
pl330_dma_slave_map_dir(enum dma_transfer_direction dir)
{
switch (dir) {
case DMA_MEM_TO_DEV:
return DMA_FROM_DEVICE;
case DMA_DEV_TO_MEM:
return DMA_TO_DEVICE;
case DMA_DEV_TO_DEV:
return DMA_BIDIRECTIONAL;
default:
return DMA_NONE;
}
}
static void pl330_unprep_slave_fifo(struct dma_pl330_chan *pch)
{
if (pch->dir != DMA_NONE)
dma_unmap_resource(pch->chan.device->dev, pch->fifo_dma,
1 << pch->burst_sz, pch->dir, 0);
pch->dir = DMA_NONE;
}
static bool pl330_prep_slave_fifo(struct dma_pl330_chan *pch,
enum dma_transfer_direction dir)
{
struct device *dev = pch->chan.device->dev;
enum dma_data_direction dma_dir = pl330_dma_slave_map_dir(dir);
/* Already mapped for this config? */
if (pch->dir == dma_dir)
return true;
pl330_unprep_slave_fifo(pch);
pch->fifo_dma = dma_map_resource(dev, pch->fifo_addr,
1 << pch->burst_sz, dma_dir, 0);
if (dma_mapping_error(dev, pch->fifo_dma))
return false;
pch->dir = dma_dir;
return true;
}
static int pl330_config(struct dma_chan *chan,
struct dma_slave_config *slave_config)
{
struct dma_pl330_chan *pch = to_pchan(chan);
pl330_unprep_slave_fifo(pch);
if (slave_config->direction == DMA_MEM_TO_DEV) {
if (slave_config->dst_addr)
pch->fifo_addr = slave_config->dst_addr;
......@@ -2235,6 +2220,7 @@ static void pl330_free_chan_resources(struct dma_chan *chan)
spin_unlock_irqrestore(&pl330->lock, flags);
pm_runtime_mark_last_busy(pch->dmac->ddma.dev);
pm_runtime_put_autosuspend(pch->dmac->ddma.dev);
pl330_unprep_slave_fifo(pch);
}
static int pl330_get_current_xferred_count(struct dma_pl330_chan *pch,
......@@ -2564,6 +2550,9 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
return NULL;
}
if (!pl330_prep_slave_fifo(pch, direction))
return NULL;
for (i = 0; i < len / period_len; i++) {
desc = pl330_get_desc(pch);
if (!desc) {
......@@ -2593,12 +2582,12 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
src = dma_addr;
dst = pch->fifo_addr;
dst = pch->fifo_dma;
break;
case DMA_DEV_TO_MEM:
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
src = pch->fifo_addr;
src = pch->fifo_dma;
dst = dma_addr;
break;
default:
......@@ -2711,12 +2700,12 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
struct dma_pl330_chan *pch = to_pchan(chan);
struct scatterlist *sg;
int i;
dma_addr_t addr;
if (unlikely(!pch || !sgl || !sg_len))
return NULL;
addr = pch->fifo_addr;
if (!pl330_prep_slave_fifo(pch, direction))
return NULL;
first = NULL;
......@@ -2742,13 +2731,13 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
if (direction == DMA_MEM_TO_DEV) {
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
fill_px(&desc->px,
addr, sg_dma_address(sg), sg_dma_len(sg));
fill_px(&desc->px, pch->fifo_dma, sg_dma_address(sg),
sg_dma_len(sg));
} else {
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
fill_px(&desc->px,
sg_dma_address(sg), addr, sg_dma_len(sg));
fill_px(&desc->px, sg_dma_address(sg), pch->fifo_dma,
sg_dma_len(sg));
}
desc->rqcfg.brst_size = pch->burst_sz;
......@@ -2906,6 +2895,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
pch->thread = NULL;
pch->chan.device = pd;
pch->dmac = pl330;
pch->dir = DMA_NONE;
/* Add the channel to the DMAC list */
list_add_tail(&pch->chan.device_node, &pd->channels);
......
drivers/dma/qcom/hidma.c
View file @ 2ceedf97
/*
* Qualcomm Technologies HIDMA DMA engine interface
*
* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
......@@ -210,6 +210,7 @@ static int hidma_chan_init(struct hidma_dev *dmadev, u32 dma_sig)
INIT_LIST_HEAD(&mchan->prepared);
INIT_LIST_HEAD(&mchan->active);
INIT_LIST_HEAD(&mchan->completed);
INIT_LIST_HEAD(&mchan->queued);
spin_lock_init(&mchan->lock);
list_add_tail(&mchan->chan.device_node, &ddev->channels);
......@@ -230,9 +231,15 @@ static void hidma_issue_pending(struct dma_chan *dmach)
struct hidma_chan *mchan = to_hidma_chan(dmach);
struct hidma_dev *dmadev = mchan->dmadev;
unsigned long flags;
struct hidma_desc *qdesc, *next;
int status;
spin_lock_irqsave(&mchan->lock, flags);
list_for_each_entry_safe(qdesc, next, &mchan->queued, node) {
hidma_ll_queue_request(dmadev->lldev, qdesc->tre_ch);
list_move_tail(&qdesc->node, &mchan->active);
}
if (!mchan->running) {
struct hidma_desc *desc = list_first_entry(&mchan->active,
struct hidma_desc,
......@@ -315,17 +322,18 @@ static dma_cookie_t hidma_tx_submit(struct dma_async_tx_descriptor *txd)
pm_runtime_put_autosuspend(dmadev->ddev.dev);
return -ENODEV;
}
pm_runtime_mark_last_busy(dmadev->ddev.dev);
pm_runtime_put_autosuspend(dmadev->ddev.dev);
mdesc = container_of(txd, struct hidma_desc, desc);
spin_lock_irqsave(&mchan->lock, irqflags);
/* Move descriptor to active */
list_move_tail(&mdesc->node, &mchan->active);
/* Move descriptor to queued */
list_move_tail(&mdesc->node, &mchan->queued);
/* Update cookie */
cookie = dma_cookie_assign(txd);
hidma_ll_queue_request(dmadev->lldev, mdesc->tre_ch);
spin_unlock_irqrestore(&mchan->lock, irqflags);
return cookie;
......@@ -431,6 +439,7 @@ static int hidma_terminate_channel(struct dma_chan *chan)
list_splice_init(&mchan->active, &list);
list_splice_init(&mchan->prepared, &list);
list_splice_init(&mchan->completed, &list);
list_splice_init(&mchan->queued, &list);
spin_unlock_irqrestore(&mchan->lock, irqflags);
/* this suspends the existing transfer */
......@@ -795,8 +804,11 @@ static int hidma_probe(struct platform_device *pdev)
device_property_read_u32(&pdev->dev, "desc-count",
&dmadev->nr_descriptors);
if (!dmadev->nr_descriptors && nr_desc_prm)
if (nr_desc_prm) {
dev_info(&pdev->dev, "overriding number of descriptors as %d\n",
nr_desc_prm);
dmadev->nr_descriptors = nr_desc_prm;
}
if (!dmadev->nr_descriptors)
dmadev->nr_descriptors = HIDMA_NR_DEFAULT_DESC;
......
drivers/dma/qcom/hidma.h
View file @ 2ceedf97
......@@ -104,6 +104,7 @@ struct hidma_chan {
struct dma_chan chan;
struct list_head free;
struct list_head prepared;
struct list_head queued;
struct list_head active;
struct list_head completed;
......
drivers/dma/qcom/hidma_mgmt.c
View file @ 2ceedf97
/*
* Qualcomm Technologies HIDMA DMA engine Management interface
*
* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
* Copyright (c) 2015-2017, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
......@@ -49,6 +49,26 @@
#define HIDMA_AUTOSUSPEND_TIMEOUT 2000
#define HIDMA_MAX_CHANNEL_WEIGHT 15
static unsigned int max_write_request;
module_param(max_write_request, uint, 0644);
MODULE_PARM_DESC(max_write_request,
"maximum write burst (default: ACPI/DT value)");
static unsigned int max_read_request;
module_param(max_read_request, uint, 0644);
MODULE_PARM_DESC(max_read_request,
"maximum read burst (default: ACPI/DT value)");
static unsigned int max_wr_xactions;
module_param(max_wr_xactions, uint, 0644);
MODULE_PARM_DESC(max_wr_xactions,
"maximum number of write transactions (default: ACPI/DT value)");
static unsigned int max_rd_xactions;
module_param(max_rd_xactions, uint, 0644);
MODULE_PARM_DESC(max_rd_xactions,
"maximum number of read transactions (default: ACPI/DT value)");
int hidma_mgmt_setup(struct hidma_mgmt_dev *mgmtdev)
{
unsigned int i;
......@@ -207,12 +227,25 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
goto out;
}
if (max_write_request) {
dev_info(&pdev->dev, "overriding max-write-burst-bytes: %d\n",
max_write_request);
mgmtdev->max_write_request = max_write_request;
} else
max_write_request = mgmtdev->max_write_request;
rc = device_property_read_u32(&pdev->dev, "max-read-burst-bytes",
&mgmtdev->max_read_request);
if (rc) {
dev_err(&pdev->dev, "max-read-burst-bytes missing\n");
goto out;
}
if (max_read_request) {
dev_info(&pdev->dev, "overriding max-read-burst-bytes: %d\n",
max_read_request);
mgmtdev->max_read_request = max_read_request;
} else
max_read_request = mgmtdev->max_read_request;
rc = device_property_read_u32(&pdev->dev, "max-write-transactions",
&mgmtdev->max_wr_xactions);
......@@ -220,6 +253,12 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "max-write-transactions missing\n");
goto out;
}
if (max_wr_xactions) {
dev_info(&pdev->dev, "overriding max-write-transactions: %d\n",
max_wr_xactions);
mgmtdev->max_wr_xactions = max_wr_xactions;
} else
max_wr_xactions = mgmtdev->max_wr_xactions;
rc = device_property_read_u32(&pdev->dev, "max-read-transactions",
&mgmtdev->max_rd_xactions);
......@@ -227,6 +266,12 @@ static int hidma_mgmt_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "max-read-transactions missing\n");
goto out;
}
if (max_rd_xactions) {
dev_info(&pdev->dev, "overriding max-read-transactions: %d\n",
max_rd_xactions);
mgmtdev->max_rd_xactions = max_rd_xactions;
} else
max_rd_xactions = mgmtdev->max_rd_xactions;
mgmtdev->priority = devm_kcalloc(&pdev->dev,
mgmtdev->dma_channels,
......
drivers/dma/sh/rcar-dmac.c
View file @ 2ceedf97
......@@ -144,6 +144,7 @@ struct rcar_dmac_chan_map {
* @chan: base DMA channel object
* @iomem: channel I/O memory base
* @index: index of this channel in the controller
* @irq: channel IRQ
* @src: slave memory address and size on the source side
* @dst: slave memory address and size on the destination side
* @mid_rid: hardware MID/RID for the DMA client using this channel
......@@ -161,6 +162,7 @@ struct rcar_dmac_chan {
struct dma_chan chan;
void __iomem *iomem;
unsigned int index;
int irq;
struct rcar_dmac_chan_slave src;
struct rcar_dmac_chan_slave dst;
......@@ -1008,7 +1010,11 @@ static void rcar_dmac_free_chan_resources(struct dma_chan *chan)
rcar_dmac_chan_halt(rchan);
spin_unlock_irq(&rchan->lock);
/* Now no new interrupts will occur */
/*
* Now no new interrupts will occur, but one might already be
* running. Wait for it to finish before freeing resources.
*/
synchronize_irq(rchan->irq);
if (rchan->mid_rid >= 0) {
/* The caller is holding dma_list_mutex */
......@@ -1366,6 +1372,13 @@ static void rcar_dmac_issue_pending(struct dma_chan *chan)
spin_unlock_irqrestore(&rchan->lock, flags);
}
static void rcar_dmac_device_synchronize(struct dma_chan *chan)
{
struct rcar_dmac_chan *rchan = to_rcar_dmac_chan(chan);
synchronize_irq(rchan->irq);
}
/* -----------------------------------------------------------------------------
* IRQ handling
*/
......@@ -1650,7 +1663,6 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
struct dma_chan *chan = &rchan->chan;
char pdev_irqname[5];
char *irqname;
int irq;
int ret;
rchan->index = index;
......@@ -1667,8 +1679,8 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
/* Request the channel interrupt. */
sprintf(pdev_irqname, "ch%u", index);
irq = platform_get_irq_byname(pdev, pdev_irqname);
if (irq < 0) {
rchan->irq = platform_get_irq_byname(pdev, pdev_irqname);
if (rchan->irq < 0) {
dev_err(dmac->dev, "no IRQ specified for channel %u\n", index);
return -ENODEV;
}
......@@ -1678,11 +1690,13 @@ static int rcar_dmac_chan_probe(struct rcar_dmac *dmac,
if (!irqname)
return -ENOMEM;
ret = devm_request_threaded_irq(dmac->dev, irq, rcar_dmac_isr_channel,
ret = devm_request_threaded_irq(dmac->dev, rchan->irq,
rcar_dmac_isr_channel,
rcar_dmac_isr_channel_thread, 0,
irqname, rchan);
if (ret) {
dev_err(dmac->dev, "failed to request IRQ %u (%d)\n", irq, ret);
dev_err(dmac->dev, "failed to request IRQ %u (%d)\n",
rchan->irq, ret);
return ret;
}
......@@ -1846,6 +1860,7 @@ static int rcar_dmac_probe(struct platform_device *pdev)
engine->device_terminate_all = rcar_dmac_chan_terminate_all;
engine->device_tx_status = rcar_dmac_tx_status;
engine->device_issue_pending = rcar_dmac_issue_pending;
engine->device_synchronize = rcar_dmac_device_synchronize;
ret = dma_async_device_register(engine);
if (ret < 0)
......
drivers/dma/ste_dma40.c
View file @ 2ceedf97
......@@ -2528,10 +2528,7 @@ dma40_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr,
dma_addr += period_len;
}
sg[periods].offset = 0;
sg_dma_len(&sg[periods]) = 0;
sg[periods].page_link =
((unsigned long)sg | 0x01) & ~0x02;
sg_chain(sg, periods + 1, sg);
txd = d40_prep_sg(chan, sg, sg, periods, direction,
DMA_PREP_INTERRUPT);
......
drivers/dma/tegra20-apb-dma.c
View file @ 2ceedf97
......@@ -1492,37 +1492,9 @@ static int tegra_dma_remove(struct platform_device *pdev)
}
static int tegra_dma_runtime_suspend(struct device *dev)
{
struct tegra_dma *tdma = dev_get_drvdata(dev);
clk_disable_unprepare(tdma->dma_clk);
return 0;
}
static int tegra_dma_runtime_resume(struct device *dev)
{
struct tegra_dma *tdma = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(tdma->dma_clk);
if (ret < 0) {
dev_err(dev, "clk_enable failed: %d\n", ret);
return ret;
}
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int tegra_dma_pm_suspend(struct device *dev)
{
struct tegra_dma *tdma = dev_get_drvdata(dev);
int i;
int ret;
/* Enable clock before accessing register */
ret = pm_runtime_get_sync(dev);
if (ret < 0)
return ret;
tdma->reg_gen = tdma_read(tdma, TEGRA_APBDMA_GENERAL);
for (i = 0; i < tdma->chip_data->nr_channels; i++) {
......@@ -1543,21 +1515,21 @@ static int tegra_dma_pm_suspend(struct device *dev)
TEGRA_APBDMA_CHAN_WCOUNT);
}
/* Disable clock */
pm_runtime_put(dev);
clk_disable_unprepare(tdma->dma_clk);
return 0;
}
static int tegra_dma_pm_resume(struct device *dev)
static int tegra_dma_runtime_resume(struct device *dev)
{
struct tegra_dma *tdma = dev_get_drvdata(dev);
int i;
int ret;
int i, ret;
/* Enable clock before accessing register */
ret = pm_runtime_get_sync(dev);
if (ret < 0)
ret = clk_prepare_enable(tdma->dma_clk);
if (ret < 0) {
dev_err(dev, "clk_enable failed: %d\n", ret);
return ret;
}
tdma_write(tdma, TEGRA_APBDMA_GENERAL, tdma->reg_gen);
tdma_write(tdma, TEGRA_APBDMA_CONTROL, 0);
......@@ -1582,16 +1554,14 @@ static int tegra_dma_pm_resume(struct device *dev)
(ch_reg->csr & ~TEGRA_APBDMA_CSR_ENB));
}
/* Disable clock */
pm_runtime_put(dev);
return 0;
}
#endif
static const struct dev_pm_ops tegra_dma_dev_pm_ops = {
SET_RUNTIME_PM_OPS(tegra_dma_runtime_suspend, tegra_dma_runtime_resume,
NULL)
SET_SYSTEM_SLEEP_PM_OPS(tegra_dma_pm_suspend, tegra_dma_pm_resume)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static const struct of_device_id tegra_dma_of_match[] = {
......
drivers/dma/xilinx/zynqmp_dma.c
View file @ 2ceedf97
......@@ -794,9 +794,6 @@ static struct dma_async_tx_descriptor *zynqmp_dma_prep_memcpy(
chan = to_chan(dchan);
if (len > ZYNQMP_DMA_MAX_TRANS_LEN)
return NULL;
desc_cnt = DIV_ROUND_UP(len, ZYNQMP_DMA_MAX_TRANS_LEN);
spin_lock_bh(&chan->lock);
......
include/linux/amba/pl080.h
View file @ 2ceedf97
......@@ -44,7 +44,14 @@
#define PL080_SYNC (0x34)
/* Per channel configuration registers */
/* The Faraday Technology FTDMAC020 variant registers */
#define FTDMAC020_CH_BUSY (0x20)
/* Identical to PL080_CONFIG */
#define FTDMAC020_CSR (0x24)
/* Identical to PL080_SYNC */
#define FTDMAC020_SYNC (0x2C)
#define FTDMAC020_REVISION (0x30)
#define FTDMAC020_FEATURE (0x34)
/* Per channel configuration registers */
#define PL080_Cx_BASE(x) ((0x100 + (x * 0x20)))
......@@ -55,13 +62,20 @@
#define PL080_CH_CONFIG (0x10)
#define PL080S_CH_CONTROL2 (0x10)
#define PL080S_CH_CONFIG (0x14)
#define PL080_LLI_ADDR_MASK (0x3fffffff << 2)
/* The Faraday FTDMAC020 derivative shuffles the registers around */
#define FTDMAC020_CH_CSR (0x00)
#define FTDMAC020_CH_CFG (0x04)
#define FTDMAC020_CH_SRC_ADDR (0x08)
#define FTDMAC020_CH_DST_ADDR (0x0C)
#define FTDMAC020_CH_LLP (0x10)
#define FTDMAC020_CH_SIZE (0x14)
#define PL080_LLI_ADDR_MASK GENMASK(31, 2)
#define PL080_LLI_ADDR_SHIFT (2)
#define PL080_LLI_LM_AHB2 BIT(0)
#define PL080_CONTROL_TC_IRQ_EN BIT(31)
#define PL080_CONTROL_PROT_MASK (0x7 << 28)
#define PL080_CONTROL_PROT_MASK GENMASK(30, 28)
#define PL080_CONTROL_PROT_SHIFT (28)
#define PL080_CONTROL_PROT_CACHE BIT(30)
#define PL080_CONTROL_PROT_BUFF BIT(29)
......@@ -70,16 +84,16 @@
#define PL080_CONTROL_SRC_INCR BIT(26)
#define PL080_CONTROL_DST_AHB2 BIT(25)
#define PL080_CONTROL_SRC_AHB2 BIT(24)
#define PL080_CONTROL_DWIDTH_MASK (0x7 << 21)
#define PL080_CONTROL_DWIDTH_MASK GENMASK(23, 21)
#define PL080_CONTROL_DWIDTH_SHIFT (21)
#define PL080_CONTROL_SWIDTH_MASK (0x7 << 18)
#define PL080_CONTROL_SWIDTH_MASK GENMASK(20, 18)
#define PL080_CONTROL_SWIDTH_SHIFT (18)
#define PL080_CONTROL_DB_SIZE_MASK (0x7 << 15)
#define PL080_CONTROL_DB_SIZE_MASK GENMASK(17, 15)
#define PL080_CONTROL_DB_SIZE_SHIFT (15)
#define PL080_CONTROL_SB_SIZE_MASK (0x7 << 12)
#define PL080_CONTROL_SB_SIZE_MASK GENMASK(14, 12)
#define PL080_CONTROL_SB_SIZE_SHIFT (12)
#define PL080_CONTROL_TRANSFER_SIZE_MASK (0xfff << 0)
#define PL080S_CONTROL_TRANSFER_SIZE_MASK (0x1ffffff << 0)
#define PL080_CONTROL_TRANSFER_SIZE_MASK GENMASK(11, 0)
#define PL080S_CONTROL_TRANSFER_SIZE_MASK GENMASK(24, 0)
#define PL080_CONTROL_TRANSFER_SIZE_SHIFT (0)
#define PL080_BSIZE_1 (0x0)
......@@ -102,11 +116,11 @@
#define PL080_CONFIG_LOCK BIT(16)
#define PL080_CONFIG_TC_IRQ_MASK BIT(15)
#define PL080_CONFIG_ERR_IRQ_MASK BIT(14)
#define PL080_CONFIG_FLOW_CONTROL_MASK (0x7 << 11)
#define PL080_CONFIG_FLOW_CONTROL_MASK GENMASK(13, 11)
#define PL080_CONFIG_FLOW_CONTROL_SHIFT (11)
#define PL080_CONFIG_DST_SEL_MASK (0xf << 6)
#define PL080_CONFIG_DST_SEL_MASK GENMASK(9, 6)
#define PL080_CONFIG_DST_SEL_SHIFT (6)
#define PL080_CONFIG_SRC_SEL_MASK (0xf << 1)
#define PL080_CONFIG_SRC_SEL_MASK GENMASK(4, 1)
#define PL080_CONFIG_SRC_SEL_SHIFT (1)
#define PL080_CONFIG_ENABLE BIT(0)
......@@ -119,6 +133,73 @@
#define PL080_FLOW_PER2MEM_PER (0x6)
#define PL080_FLOW_SRC2DST_SRC (0x7)
#define FTDMAC020_CH_CSR_TC_MSK BIT(31)
/* Later versions have a threshold in bits 24..26, */
#define FTDMAC020_CH_CSR_FIFOTH_MSK GENMASK(26, 24)
#define FTDMAC020_CH_CSR_FIFOTH_SHIFT (24)
#define FTDMAC020_CH_CSR_CHPR1_MSK GENMASK(23, 22)
#define FTDMAC020_CH_CSR_PROT3 BIT(21)
#define FTDMAC020_CH_CSR_PROT2 BIT(20)
#define FTDMAC020_CH_CSR_PROT1 BIT(19)
#define FTDMAC020_CH_CSR_SRC_SIZE_MSK GENMASK(18, 16)
#define FTDMAC020_CH_CSR_SRC_SIZE_SHIFT (16)
#define FTDMAC020_CH_CSR_ABT BIT(15)
#define FTDMAC020_CH_CSR_SRC_WIDTH_MSK GENMASK(13, 11)
#define FTDMAC020_CH_CSR_SRC_WIDTH_SHIFT (11)
#define FTDMAC020_CH_CSR_DST_WIDTH_MSK GENMASK(10, 8)
#define FTDMAC020_CH_CSR_DST_WIDTH_SHIFT (8)
#define FTDMAC020_CH_CSR_MODE BIT(7)
/* 00 = increase, 01 = decrease, 10 = fix */
#define FTDMAC020_CH_CSR_SRCAD_CTL_MSK GENMASK(6, 5)
#define FTDMAC020_CH_CSR_SRCAD_CTL_SHIFT (5)
#define FTDMAC020_CH_CSR_DSTAD_CTL_MSK GENMASK(4, 3)
#define FTDMAC020_CH_CSR_DSTAD_CTL_SHIFT (3)
#define FTDMAC020_CH_CSR_SRC_SEL BIT(2)
#define FTDMAC020_CH_CSR_DST_SEL BIT(1)
#define FTDMAC020_CH_CSR_EN BIT(0)
/* FIFO threshold setting */
#define FTDMAC020_CH_CSR_FIFOTH_1 (0x0)
#define FTDMAC020_CH_CSR_FIFOTH_2 (0x1)
#define FTDMAC020_CH_CSR_FIFOTH_4 (0x2)
#define FTDMAC020_CH_CSR_FIFOTH_8 (0x3)
#define FTDMAC020_CH_CSR_FIFOTH_16 (0x4)
/* The FTDMAC020 supports 64bit wide transfers */
#define FTDMAC020_WIDTH_64BIT (0x3)
/* Address can be increased, decreased or fixed */
#define FTDMAC020_CH_CSR_SRCAD_CTL_INC (0x0)
#define FTDMAC020_CH_CSR_SRCAD_CTL_DEC (0x1)
#define FTDMAC020_CH_CSR_SRCAD_CTL_FIXED (0x2)
#define FTDMAC020_CH_CFG_LLP_CNT_MASK GENMASK(19, 16)
#define FTDMAC020_CH_CFG_LLP_CNT_SHIFT (16)
#define FTDMAC020_CH_CFG_BUSY BIT(8)
#define FTDMAC020_CH_CFG_INT_ABT_MASK BIT(2)
#define FTDMAC020_CH_CFG_INT_ERR_MASK BIT(1)
#define FTDMAC020_CH_CFG_INT_TC_MASK BIT(0)
/* Inside the LLIs, the applicable CSR fields are mapped differently */
#define FTDMAC020_LLI_TC_MSK BIT(28)
#define FTDMAC020_LLI_SRC_WIDTH_MSK GENMASK(27, 25)
#define FTDMAC020_LLI_SRC_WIDTH_SHIFT (25)
#define FTDMAC020_LLI_DST_WIDTH_MSK GENMASK(24, 22)
#define FTDMAC020_LLI_DST_WIDTH_SHIFT (22)
#define FTDMAC020_LLI_SRCAD_CTL_MSK GENMASK(21, 20)
#define FTDMAC020_LLI_SRCAD_CTL_SHIFT (20)
#define FTDMAC020_LLI_DSTAD_CTL_MSK GENMASK(19, 18)
#define FTDMAC020_LLI_DSTAD_CTL_SHIFT (18)
#define FTDMAC020_LLI_SRC_SEL BIT(17)
#define FTDMAC020_LLI_DST_SEL BIT(16)
#define FTDMAC020_LLI_TRANSFER_SIZE_MASK GENMASK(11, 0)
#define FTDMAC020_LLI_TRANSFER_SIZE_SHIFT (0)
#define FTDMAC020_CFG_LLP_CNT_MASK GENMASK(19, 16)
#define FTDMAC020_CFG_LLP_CNT_SHIFT (16)
#define FTDMAC020_CFG_BUSY BIT(8)
#define FTDMAC020_CFG_INT_ABT_MSK BIT(2)
#define FTDMAC020_CFG_INT_ERR_MSK BIT(1)
#define FTDMAC020_CFG_INT_TC_MSK BIT(0)
/* DMA linked list chain structure */
struct pl080_lli {
......
include/linux/amba/pl08x.h
View file @ 2ceedf97
......@@ -47,8 +47,6 @@ enum {
* devices with static assignments
* @muxval: a number usually used to poke into some mux regiser to
* mux in the signal to this channel
* @cctl_memcpy: options for the channel control register for memcpy
* *** not used for slave channels ***
* @addr: source/target address in physical memory for this DMA channel,
* can be the address of a FIFO register for burst requests for example.
* This can be left undefined if the PrimeCell API is used for configuring
......@@ -63,12 +61,28 @@ struct pl08x_channel_data {
int min_signal;
int max_signal;
u32 muxval;
u32 cctl_memcpy;
dma_addr_t addr;
bool single;
u8 periph_buses;
};
enum pl08x_burst_size {
PL08X_BURST_SZ_1,
PL08X_BURST_SZ_4,
PL08X_BURST_SZ_8,
PL08X_BURST_SZ_16,
PL08X_BURST_SZ_32,
PL08X_BURST_SZ_64,
PL08X_BURST_SZ_128,
PL08X_BURST_SZ_256,
};
enum pl08x_bus_width {
PL08X_BUS_WIDTH_8_BITS,
PL08X_BUS_WIDTH_16_BITS,
PL08X_BUS_WIDTH_32_BITS,
};
/**
* struct pl08x_platform_data - the platform configuration for the PL08x
* PrimeCells.
......@@ -76,6 +90,11 @@ struct pl08x_channel_data {
* platform, all inclusive, including multiplexed channels. The available
* physical channels will be multiplexed around these signals as they are
* requested, just enumerate all possible channels.
* @num_slave_channels: number of elements in the slave channel array
* @memcpy_burst_size: the appropriate burst size for memcpy operations
* @memcpy_bus_width: memory bus width
* @memcpy_prot_buff: whether memcpy DMA is bufferable
* @memcpy_prot_cache: whether memcpy DMA is cacheable
* @get_xfer_signal: request a physical signal to be used for a DMA transfer
* immediately: if there is some multiplexing or similar blocking the use
* of the channel the transfer can be denied by returning less than zero,
......@@ -90,7 +109,10 @@ struct pl08x_channel_data {
struct pl08x_platform_data {
struct pl08x_channel_data *slave_channels;
unsigned int num_slave_channels;
struct pl08x_channel_data memcpy_channel;
enum pl08x_burst_size memcpy_burst_size;
enum pl08x_bus_width memcpy_bus_width;
bool memcpy_prot_buff;
bool memcpy_prot_cache;
int (*get_xfer_signal)(const struct pl08x_channel_data *);
void (*put_xfer_signal)(const struct pl08x_channel_data *, int);
u8 lli_buses;
......
include/linux/raid/pq.h
View file @ 2ceedf97
......@@ -142,6 +142,7 @@ int raid6_select_algo(void);
extern const u8 raid6_gfmul[256][256] __attribute__((aligned(256)));
extern const u8 raid6_vgfmul[256][32] __attribute__((aligned(256)));
extern const u8 raid6_gfexp[256] __attribute__((aligned(256)));
extern const u8 raid6_gflog[256] __attribute__((aligned(256)));
extern const u8 raid6_gfinv[256] __attribute__((aligned(256)));
extern const u8 raid6_gfexi[256] __attribute__((aligned(256)));
......
lib/raid6/mktables.c
View file @ 2ceedf97
......@@ -125,6 +125,26 @@ int main(int argc, char *argv[])
printf("EXPORT_SYMBOL(raid6_gfexp);\n");
printf("#endif\n");
/* Compute log-of-2 table */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gflog[256] =\n" "{\n");
for (i = 0; i < 256; i += 8) {
printf("\t");
for (j = 0; j < 8; j++) {
v = 255;
for (k = 0; k < 256; k++)
if (exptbl[k] == (i + j)) {
v = k;
break;
}
printf("0x%02x,%c", v, (j == 7) ? '\n' : ' ');
}
}
printf("};\n");
printf("#ifdef __KERNEL__\n");
printf("EXPORT_SYMBOL(raid6_gflog);\n");
printf("#endif\n");
/* Compute inverse table x^-1 == x^254 */
printf("\nconst u8 __attribute__((aligned(256)))\n"
"raid6_gfinv[256] =\n" "{\n");
......
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