From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
To: dmaengine@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, Vinod Koul <vkoul@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Subject: [PATCH v5 06/15] dmaengine: dw-edma: Add device_prep_interleave_dma() support
Date: Thu, 11 Feb 2021 10:12:39 +0100 [thread overview]
Message-ID: <bd6df859545aba8fa5de14cc19792dde070b0950.1613034728.git.gustavo.pimentel@synopsys.com> (raw)
In-Reply-To: <cover.1613034728.git.gustavo.pimentel@synopsys.com>
In-Reply-To: <cover.1613034728.git.gustavo.pimentel@synopsys.com>
Add device_prep_interleave_dma() support to Synopsys DMA driver.
This feature implements a similar data transfer mechanism to the
scatter-gather implementation.
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
---
drivers/dma/dw-edma/dw-edma-core.c | 85 ++++++++++++++++++++++++++++++--------
drivers/dma/dw-edma/dw-edma-core.h | 13 ++++--
2 files changed, 78 insertions(+), 20 deletions(-)
diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index b65c32e1..0fe3835 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -329,7 +329,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
struct dw_edma_chunk *chunk;
struct dw_edma_burst *burst;
struct dw_edma_desc *desc;
- u32 cnt;
+ u32 cnt = 0;
int i;
if (!chan->configured)
@@ -352,12 +352,19 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
return NULL;
}
- if (xfer->cyclic) {
+ if (xfer->type == EDMA_XFER_CYCLIC) {
if (!xfer->xfer.cyclic.len || !xfer->xfer.cyclic.cnt)
return NULL;
- } else {
+ } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
if (xfer->xfer.sg.len < 1)
return NULL;
+ } else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+ if (!xfer->xfer.il->numf)
+ return NULL;
+ if (xfer->xfer.il->numf > 0 && xfer->xfer.il->frame_size > 0)
+ return NULL;
+ } else {
+ return NULL;
}
desc = dw_edma_alloc_desc(chan);
@@ -368,18 +375,28 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
if (unlikely(!chunk))
goto err_alloc;
- src_addr = chan->config.src_addr;
- dst_addr = chan->config.dst_addr;
+ if (xfer->type == EDMA_XFER_INTERLEAVED) {
+ src_addr = xfer->xfer.il->src_start;
+ dst_addr = xfer->xfer.il->dst_start;
+ } else {
+ src_addr = chan->config.src_addr;
+ dst_addr = chan->config.dst_addr;
+ }
- if (xfer->cyclic) {
+ if (xfer->type == EDMA_XFER_CYCLIC) {
cnt = xfer->xfer.cyclic.cnt;
- } else {
+ } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
cnt = xfer->xfer.sg.len;
sg = xfer->xfer.sg.sgl;
+ } else if (xfer->type == EDMA_XFER_INTERLEAVED) {
+ if (xfer->xfer.il->numf > 0)
+ cnt = xfer->xfer.il->numf;
+ else
+ cnt = xfer->xfer.il->frame_size;
}
for (i = 0; i < cnt; i++) {
- if (!xfer->cyclic && !sg)
+ if (xfer->type == EDMA_XFER_SCATTER_GATHER && !sg)
break;
if (chunk->bursts_alloc == chan->ll_max) {
@@ -392,19 +409,21 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
if (unlikely(!burst))
goto err_alloc;
- if (xfer->cyclic)
+ if (xfer->type == EDMA_XFER_CYCLIC)
burst->sz = xfer->xfer.cyclic.len;
- else
+ else if (xfer->type == EDMA_XFER_SCATTER_GATHER)
burst->sz = sg_dma_len(sg);
+ else if (xfer->type == EDMA_XFER_INTERLEAVED)
+ burst->sz = xfer->xfer.il->sgl[i].size;
chunk->ll_region.sz += burst->sz;
desc->alloc_sz += burst->sz;
if (chan->dir == EDMA_DIR_WRITE) {
burst->sar = src_addr;
- if (xfer->cyclic) {
+ if (xfer->type == EDMA_XFER_CYCLIC) {
burst->dar = xfer->xfer.cyclic.paddr;
- } else {
+ } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
burst->dar = dst_addr;
/* Unlike the typical assumption by other
* drivers/IPs the peripheral memory isn't
@@ -416,9 +435,9 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
}
} else {
burst->dar = dst_addr;
- if (xfer->cyclic) {
+ if (xfer->type == EDMA_XFER_CYCLIC) {
burst->sar = xfer->xfer.cyclic.paddr;
- } else {
+ } else if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
burst->sar = src_addr;
/* Unlike the typical assumption by other
* drivers/IPs the peripheral memory isn't
@@ -430,10 +449,24 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
}
}
- if (!xfer->cyclic) {
+ if (xfer->type == EDMA_XFER_SCATTER_GATHER) {
src_addr += sg_dma_len(sg);
dst_addr += sg_dma_len(sg);
sg = sg_next(sg);
+ } else if (xfer->type == EDMA_XFER_INTERLEAVED &&
+ xfer->xfer.il->frame_size > 0) {
+ struct dma_interleaved_template *il = xfer->xfer.il;
+ struct data_chunk *dc = &il->sgl[i];
+
+ if (il->src_sgl) {
+ src_addr += burst->sz;
+ src_addr += dmaengine_get_src_icg(il, dc);
+ }
+
+ if (il->dst_sgl) {
+ dst_addr += burst->sz;
+ dst_addr += dmaengine_get_dst_icg(il, dc);
+ }
}
}
@@ -459,7 +492,7 @@ dw_edma_device_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl,
xfer.xfer.sg.sgl = sgl;
xfer.xfer.sg.len = len;
xfer.flags = flags;
- xfer.cyclic = false;
+ xfer.type = EDMA_XFER_SCATTER_GATHER;
return dw_edma_device_transfer(&xfer);
}
@@ -478,7 +511,23 @@ dw_edma_device_prep_dma_cyclic(struct dma_chan *dchan, dma_addr_t paddr,
xfer.xfer.cyclic.len = len;
xfer.xfer.cyclic.cnt = count;
xfer.flags = flags;
- xfer.cyclic = true;
+ xfer.type = EDMA_XFER_CYCLIC;
+
+ return dw_edma_device_transfer(&xfer);
+}
+
+static struct dma_async_tx_descriptor *
+dw_edma_device_prep_interleaved_dma(struct dma_chan *dchan,
+ struct dma_interleaved_template *ilt,
+ unsigned long flags)
+{
+ struct dw_edma_transfer xfer;
+
+ xfer.dchan = dchan;
+ xfer.direction = ilt->dir;
+ xfer.xfer.il = ilt;
+ xfer.flags = flags;
+ xfer.type = EDMA_XFER_INTERLEAVED;
return dw_edma_device_transfer(&xfer);
}
@@ -738,6 +787,7 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
dma_cap_set(DMA_SLAVE, dma->cap_mask);
dma_cap_set(DMA_CYCLIC, dma->cap_mask);
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
+ dma_cap_set(DMA_INTERLEAVE, dma->cap_mask);
dma->directions = BIT(write ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV);
dma->src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
dma->dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
@@ -756,6 +806,7 @@ static int dw_edma_channel_setup(struct dw_edma_chip *chip, bool write,
dma->device_tx_status = dw_edma_device_tx_status;
dma->device_prep_slave_sg = dw_edma_device_prep_slave_sg;
dma->device_prep_dma_cyclic = dw_edma_device_prep_dma_cyclic;
+ dma->device_prep_interleaved_dma = dw_edma_device_prep_interleaved_dma;
dma_set_max_seg_size(dma->dev, U32_MAX);
diff --git a/drivers/dma/dw-edma/dw-edma-core.h b/drivers/dma/dw-edma/dw-edma-core.h
index 3f9593e..f72ebaa 100644
--- a/drivers/dma/dw-edma/dw-edma-core.h
+++ b/drivers/dma/dw-edma/dw-edma-core.h
@@ -39,6 +39,12 @@ enum dw_edma_status {
EDMA_ST_BUSY
};
+enum dw_edma_xfer_type {
+ EDMA_XFER_SCATTER_GATHER = 0,
+ EDMA_XFER_CYCLIC,
+ EDMA_XFER_INTERLEAVED
+};
+
struct dw_edma_chan;
struct dw_edma_chunk;
@@ -146,12 +152,13 @@ struct dw_edma_cyclic {
struct dw_edma_transfer {
struct dma_chan *dchan;
union dw_edma_xfer {
- struct dw_edma_sg sg;
- struct dw_edma_cyclic cyclic;
+ struct dw_edma_sg sg;
+ struct dw_edma_cyclic cyclic;
+ struct dma_interleaved_template *il;
} xfer;
enum dma_transfer_direction direction;
unsigned long flags;
- bool cyclic;
+ enum dw_edma_xfer_type type;
};
static inline
--
2.7.4
next prev parent reply other threads:[~2021-02-11 9:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-11 9:12 [PATCH v5 00/15] dmaengine: dw-edma: HDMA support Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 01/15] dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 02/15] dmaengine: dw-edma: Fix comments offset characters' alignment Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 03/15] dmaengine: dw-edma: Add support for the HDMA feature Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 04/15] PCI: Add pci_find_vsec_capability() to find a specific VSEC Gustavo Pimentel
2021-02-11 12:50 ` Krzysztof Wilczyński
2021-02-11 19:42 ` Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 05/15] dmaengine: dw-edma: Add PCIe VSEC data retrieval support Gustavo Pimentel
2021-02-11 12:59 ` Krzysztof Wilczyński
2021-02-11 13:48 ` Gustavo Pimentel
2021-02-11 9:12 ` Gustavo Pimentel [this message]
2021-02-11 9:12 ` [PATCH v5 07/15] dmaengine: dw-edma: Improve number of channels check Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 08/15] dmaengine: dw-edma: Reorder variables to keep consistency Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 09/15] dmaengine: dw-edma: Improve the linked list and data blocks definition Gustavo Pimentel
2021-02-11 13:08 ` Krzysztof Wilczyński
2021-02-11 9:12 ` [PATCH v5 10/15] dmaengine: dw-edma: Change linked list and data blocks offset and sizes Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 11/15] dmaengine: dw-edma: Move struct dentry variable from static definition into dw_edma struct Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 12/15] dmaengine: dw-edma: Fix crash on loading/unloading driver Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 13/15] dmaengine: dw-edma: Change DMA abreviation from lower into upper case Gustavo Pimentel
2021-02-11 9:12 ` [PATCH v5 14/15] dmaengine: dw-edma: Revert fix scatter-gather address calculation Gustavo Pimentel
2021-02-11 13:09 ` Krzysztof Wilczyński
2021-02-11 9:12 ` [PATCH v5 15/15] dmaengine: dw-edma: Add pcim_iomap_table return check Gustavo Pimentel
2021-02-11 13:14 ` Krzysztof Wilczyński
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bd6df859545aba8fa5de14cc19792dde070b0950.1613034728.git.gustavo.pimentel@synopsys.com \
--to=gustavo.pimentel@synopsys.com \
--cc=bhelgaas@google.com \
--cc=dan.j.williams@intel.com \
--cc=dmaengine@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).