[alsa-devel] [PATCH 4/7] ASoC: Intel: Skylake: Add code loader DMA APIs
Vinod Koul
vinod.koul at intel.com
Fri Jul 10 18:48:42 CEST 2015
This patch adds the last piece of code loader DMA APIs by adding the code
loader DMA APIs for the driver to use
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty at intel.com>
Signed-off-by: Jeeja KP <jeeja.kp at intel.com>
Signed-off-by: Vinod Koul <vinod.koul at intel.com>
---
sound/soc/intel/common/sst-dsp-priv.h | 3 +
sound/soc/intel/skylake/Makefile | 2 +-
sound/soc/intel/skylake/skl-sst-cldma.c | 133 ++++++++++++++++++++++++++++++++
sound/soc/intel/skylake/skl-sst-dsp.h | 6 ++
4 files changed, 143 insertions(+), 1 deletion(-)
diff --git a/sound/soc/intel/common/sst-dsp-priv.h b/sound/soc/intel/common/sst-dsp-priv.h
index dd79648dfb3a..cbd568eac033 100644
--- a/sound/soc/intel/common/sst-dsp-priv.h
+++ b/sound/soc/intel/common/sst-dsp-priv.h
@@ -308,8 +308,11 @@ struct sst_dsp {
/* SKL data */
+ /* To allocate CL dma buffers */
+ struct skl_dsp_loader_ops dsp_ops;
struct skl_dsp_fw_ops fw_ops;
int sst_state;
+ struct skl_cl_dev cl_dev;
u32 intr_status;
};
diff --git a/sound/soc/intel/skylake/Makefile b/sound/soc/intel/skylake/Makefile
index 10c1319f7ed5..eff3e1758b89 100644
--- a/sound/soc/intel/skylake/Makefile
+++ b/sound/soc/intel/skylake/Makefile
@@ -3,6 +3,6 @@ snd-soc-skl-objs := skl.o skl-pcm.o
obj-$(CONFIG_SND_SOC_INTEL_SKYLAKE) += snd-soc-skl.o
# Skylake IPC Support
-snd-soc-skl-ipc-objs := skl-sst-ipc.o skl-sst-dsp.o
+snd-soc-skl-ipc-objs := skl-sst-ipc.o skl-sst-dsp.o skl-sst-cldma.o
obj-$(CONFIG_SND_SOC_INTEL_SKYLAKE) += snd-soc-skl-ipc.o
diff --git a/sound/soc/intel/skylake/skl-sst-cldma.c b/sound/soc/intel/skylake/skl-sst-cldma.c
index 44019eef6114..44748ba98da2 100644
--- a/sound/soc/intel/skylake/skl-sst-cldma.c
+++ b/sound/soc/intel/skylake/skl-sst-cldma.c
@@ -192,3 +192,136 @@ static void skl_cldma_fill_buffer(struct sst_dsp *ctx, unsigned int size,
if (trigger)
ctx->cl_dev.ops.cl_trigger(ctx, true);
}
+
+/*
+ * The CL dma doesn't have any way to update the transfer status until a BDL
+ * buffer is fully transferred
+ *
+ * So Copying is divided in two parts.
+ * 1. Interrupt on buffer done where the size to be transferred is more than
+ * ring buffer size.
+ * 2. Polling on fw register to identify if data left to transferred doesn't
+ * fill the ring buffer. Caller takes care of polling the required status
+ * register to identify the transfer status.
+ */
+static int
+skl_cldma_copy_to_buf(struct sst_dsp *ctx, const void *bin, u32 total_size)
+{
+ int ret = 0;
+ bool start = true;
+ unsigned int excess_bytes;
+ u32 size;
+ unsigned int bytes_left = total_size;
+ const void *curr_pos = bin;
+
+ if (total_size <= 0)
+ return -EINVAL;
+
+ dev_dbg(ctx->dev, "%s: Total binary size: %u\n", __func__, bytes_left);
+
+ while (bytes_left) {
+ if (bytes_left > ctx->cl_dev.bufsize) {
+
+ /*
+ * dma transfers only till the write pointer as
+ * updated in spib
+ */
+ if (ctx->cl_dev.curr_spib_pos == 0)
+ ctx->cl_dev.curr_spib_pos = ctx->cl_dev.bufsize;
+
+ size = ctx->cl_dev.bufsize;
+ skl_cldma_fill_buffer(ctx, size, curr_pos, true, start);
+
+ start = false;
+ ret = skl_cldma_wait_interruptible(ctx);
+ if (ret < 0) {
+ skl_cldma_stop(ctx);
+ return ret;
+ }
+
+ } else {
+ skl_cldma_int_disable(ctx);
+
+ if ((ctx->cl_dev.curr_spib_pos + bytes_left)
+ <= ctx->cl_dev.bufsize) {
+ ctx->cl_dev.curr_spib_pos += bytes_left;
+ } else {
+ excess_bytes = bytes_left -
+ (ctx->cl_dev.bufsize -
+ ctx->cl_dev.curr_spib_pos);
+ ctx->cl_dev.curr_spib_pos = excess_bytes;
+ }
+
+ size = bytes_left;
+ skl_cldma_fill_buffer(ctx, size,
+ curr_pos, false, start);
+ }
+ bytes_left -= size;
+ curr_pos = curr_pos + size;
+ }
+
+ return ret;
+}
+
+void skl_cldma_process_intr(struct sst_dsp *ctx)
+{
+ u8 cl_dma_intr_status;
+
+ cl_dma_intr_status =
+ sst_dsp_shim_read_unlocked(ctx, SKL_ADSP_REG_CL_SD_STS);
+
+ if (!(cl_dma_intr_status & SKL_CL_DMA_SD_INT_COMPLETE))
+ ctx->cl_dev.wake_status = SKL_CL_DMA_ERR;
+ else
+ ctx->cl_dev.wake_status = SKL_CL_DMA_BUF_COMPLETE;
+
+ ctx->cl_dev.wait_condition = true;
+ wake_up(&ctx->cl_dev.wait_queue);
+}
+
+int skl_cldma_prepare(struct sst_dsp *ctx)
+{
+ int ret;
+ u32 *bdl;
+
+ ctx->cl_dev.bufsize = SKL_MAX_BUFFER_SIZE;
+
+ /* Allocate cl ops */
+ ctx->cl_dev.ops.cl_setup_bdle = skl_cldma_setup_bdle;
+ ctx->cl_dev.ops.cl_setup_controller = skl_cldma_setup_controller;
+ ctx->cl_dev.ops.cl_setup_spb = skl_cldma_setup_spb;
+ ctx->cl_dev.ops.cl_cleanup_spb = skl_cldma_cleanup_spb;
+ ctx->cl_dev.ops.cl_trigger = skl_cldma_trigger;
+ ctx->cl_dev.ops.cl_cleanup_controller = skl_cldma_cleanup;
+ ctx->cl_dev.ops.cl_copy_to_dmabuf = skl_cldma_copy_to_buf;
+ ctx->cl_dev.ops.cl_stop_dma = skl_cldma_stop;
+
+ /* Allocate buffer*/
+ ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
+ &ctx->cl_dev.dmab_data, ctx->cl_dev.bufsize);
+ if (ret < 0) {
+ dev_err(ctx->dev, "Alloc buffer for base fw failed: %x", ret);
+ return ret;
+ }
+ /* Setup Code loader BDL */
+ ret = ctx->dsp_ops.alloc_dma_buf(ctx->dev,
+ &ctx->cl_dev.dmab_bdl, PAGE_SIZE);
+ if (ret < 0) {
+ dev_err(ctx->dev, "Alloc buffer for blde failed: %x", ret);
+ ctx->dsp_ops.free_dma_buf(ctx->dev, &ctx->cl_dev.dmab_data);
+ return ret;
+ }
+ bdl = (u32 *)ctx->cl_dev.dmab_bdl.area;
+
+ /* Allocate BDLs */
+ ctx->cl_dev.ops.cl_setup_bdle(ctx, &ctx->cl_dev.dmab_data,
+ &bdl, ctx->cl_dev.bufsize, 1);
+ ctx->cl_dev.ops.cl_setup_controller(ctx, &ctx->cl_dev.dmab_bdl,
+ ctx->cl_dev.bufsize, ctx->cl_dev.frags);
+
+ ctx->cl_dev.curr_spib_pos = 0;
+ ctx->cl_dev.dma_buffer_offset = 0;
+ init_waitqueue_head(&ctx->cl_dev.wait_queue);
+
+ return ret;
+}
diff --git a/sound/soc/intel/skylake/skl-sst-dsp.h b/sound/soc/intel/skylake/skl-sst-dsp.h
index c2d28781309a..e8ce1364bf7b 100644
--- a/sound/soc/intel/skylake/skl-sst-dsp.h
+++ b/sound/soc/intel/skylake/skl-sst-dsp.h
@@ -17,7 +17,9 @@
#define __SKL_SST_DSP_H__
#include <sound/memalloc.h>
+#include "skl-sst-cldma.h"
+struct sst_dsp;
struct sst_dsp_device;
/* Intel HD Audio General DSP Registers */
@@ -113,6 +115,10 @@ struct skl_dsp_loader_ops {
struct snd_dma_buffer *dmab);
};
+void skl_cldma_process_intr(struct sst_dsp *ctx);
+void skl_cldma_int_disable(struct sst_dsp *ctx);
+int skl_cldma_prepare(struct sst_dsp *ctx);
+
void skl_dsp_set_state_locked(struct sst_dsp *ctx, int state);
struct sst_dsp *skl_dsp_ctx_init(struct device *dev,
struct sst_dsp_device *sst_dev, int irq);
--
1.9.1
More information about the Alsa-devel
mailing list