[PATCH v3 10/25] ASoC: qcom: q6asm: Add support to memory map and unmap

srinivas.kandagatla
2018-02-13T17:07:48Z

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch adds support to memory map and unmap regions commands in
q6asm module.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
sound/soc/qcom/qdsp6/q6asm.c | 312 +++++++++++++++++++++++++++++++++++++++++++
sound/soc/qcom/qdsp6/q6asm.h | 5 +
2 files changed, 317 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6asm.c b/sound/soc/qcom/qdsp6/q6asm.c
index 768d9b446da9..412275edb15c 100644
--- a/sound/soc/qcom/qdsp6/q6asm.c
+++ b/sound/soc/qcom/qdsp6/q6asm.c
@@ -17,10 +17,47 @@
#include "q6dsp-errno.h"
#include "q6dsp-common.h"

+#define ASM_CMD_SHARED_MEM_MAP_REGIONS 0x00010D92
+#define ASM_CMDRSP_SHARED_MEM_MAP_REGIONS 0x00010D93
+#define ASM_CMD_SHARED_MEM_UNMAP_REGIONS 0x00010D94
+
#define ASM_SYNC_IO_MODE 0x0001
#define ASM_ASYNC_IO_MODE 0x0002
#define ASM_TUN_READ_IO_MODE 0x0004 /* tunnel read write mode */
#define ASM_TUN_WRITE_IO_MODE 0x0008 /* tunnel read write mode */
+#define ASM_SHIFT_GAPLESS_MODE_FLAG 31
+#define ADSP_MEMORY_MAP_SHMEM8_4K_POOL 3
+
+struct avs_cmd_shared_mem_map_regions {
+ struct apr_hdr hdr;
+ u16 mem_pool_id;
+ u16 num_regions;
+ u32 property_flag;
+} __packed;
+
+struct avs_shared_map_region_payload {
+ u32 shm_addr_lsw;
+ u32 shm_addr_msw;
+ u32 mem_size_bytes;
+} __packed;
+
+struct avs_cmd_shared_mem_unmap_regions {
+ struct apr_hdr hdr;
+ u32 mem_map_handle;
+} __packed;
+
+struct audio_buffer {
+ phys_addr_t phys;
+ uint32_t used;
+ uint32_t size; /* size of buffer */
+};
+
+struct audio_port_data {
+ struct audio_buffer *buf;
+ uint32_t num_periods;
+ uint32_t dsp_buf;
+ uint32_t mem_map_handle;
+};

struct audio_client {
int session;
@@ -30,6 +67,8 @@ struct audio_client {
uint32_t io_mode;
struct apr_device *adev;
struct mutex lock;
+ /* idx:1 out port, 0: in port */
+ struct audio_port_data port[2];
wait_queue_head_t cmd_wait;
int perf_mode;
int stream_id;
@@ -63,6 +102,237 @@ static bool q6asm_is_valid_audio_client(struct audio_client *ac)
return false;
}

+static inline void q6asm_add_hdr(struct audio_client *ac, struct apr_hdr *hdr,
+ uint32_t pkt_size, bool cmd_flg,
+ uint32_t stream_id)
+{
+ hdr->hdr_field = APR_SEQ_CMD_HDR_FIELD;
+ hdr->src_svc = ac->adev->svc_id;
+ hdr->src_domain = APR_DOMAIN_APPS;
+ hdr->dest_svc = APR_SVC_ASM;
+ hdr->dest_domain = APR_DOMAIN_ADSP;
+ hdr->src_port = ((ac->session << 8) & 0xFF00) | (stream_id);
+ hdr->dest_port = ((ac->session << 8) & 0xFF00) | (stream_id);
+ hdr->pkt_size = pkt_size;
+ if (cmd_flg)
+ hdr->token = ac->session;
+}
+
+static int q6asm_apr_send_session_pkt(struct q6asm *a, struct audio_client *ac,
+ void *data)
+{
+ int rc;
+
+ mutex_lock(&a->session_lock);
+ a->mem_state = 1;
+ rc = apr_send_pkt(a->adev, data);
+ if (rc < 0)
+ goto err;
+
+ rc = wait_event_timeout(a->mem_wait, (a->mem_state <= 0), 5 * HZ);
+ if (!rc) {
+ dev_err(a->dev, "CMD timeout \n");
+ rc = -ETIMEDOUT;
+ } else if (a->mem_state < 0) {
+ rc = q6dsp_errno(a->mem_state);
+ }
+
+err:
+ mutex_unlock(&a->session_lock);
+ return rc;
+}
+
+static int __q6asm_memory_unmap(struct audio_client *ac,
+ phys_addr_t buf_add, int dir)
+{
+ struct avs_cmd_shared_mem_unmap_regions mem_unmap;
+ struct q6asm *a = dev_get_drvdata(ac->dev);
+ int rc;
+
+ if (ac->port[dir].mem_map_handle == 0) {
+ dev_err(ac->dev, "invalid mem handle\n");
+ return -EINVAL;
+ }
+
+ mem_unmap.hdr.hdr_field = APR_SEQ_CMD_HDR_FIELD;
+ mem_unmap.hdr.src_port = 0;
+ mem_unmap.hdr.dest_port = 0;
+ mem_unmap.hdr.pkt_size = sizeof(mem_unmap);
+ mem_unmap.hdr.token = ((ac->session << 8) | dir);
+
+ mem_unmap.hdr.opcode = ASM_CMD_SHARED_MEM_UNMAP_REGIONS;
+ mem_unmap.mem_map_handle = ac->port[dir].mem_map_handle;
+
+ rc = q6asm_apr_send_session_pkt(a, ac, &mem_unmap);
+ if (rc < 0)
+ return rc;
+
+ ac->port[dir].mem_map_handle = 0;
+
+ return 0;
+}
+
+/**
+ * q6asm_unmap_memory_regions() - unmap memory regions in the dsp.
+ *
+ * @dir: direction of audio stream
+ * @ac: audio client instanace
+ *
+ * Return: Will be an negative value on failure or zero on success
+ */
+int q6asm_unmap_memory_regions(unsigned int dir, struct audio_client *ac)
+{
+ struct audio_port_data *port;
+ int cnt = 0;
+ int rc = 0;
+
+ mutex_lock(&ac->lock);
+ port = &ac->port[dir];
+ if (!port->buf) {
+ rc = -EINVAL;
+ goto err;
+ }
+ cnt = port->num_periods - 1;
+ if (cnt >= 0) {
+ rc = __q6asm_memory_unmap(ac, port->buf[dir].phys, dir);
+ if (rc < 0) {
+ dev_err(ac->dev, "%s: Memory_unmap_regions failed %d\n",
+ __func__, rc);
+ goto err;
+ }
+ }
+
+ port->num_periods = 0;
+ kfree(port->buf);
+ port->buf = NULL;
+
+err:
+ mutex_unlock(&ac->lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(q6asm_unmap_memory_regions);
+
+static int __q6asm_memory_map_regions(struct audio_client *ac, int dir,
+ size_t period_sz, unsigned int periods,
+ bool is_contiguous)
+{
+ struct avs_cmd_shared_mem_map_regions *cmd = NULL;
+ struct avs_shared_map_region_payload *mregions = NULL;
+ struct q6asm *a = dev_get_drvdata(ac->dev);
+ struct audio_port_data *port = NULL;
+ struct audio_buffer *ab = NULL;
+ void *mmap_region_cmd = NULL;
+ uint32_t num_regions, buf_sz;
+ int rc, i, cmd_size;
+
+ num_regions = is_contiguous ? 1 : periods;
+ buf_sz = is_contiguous ? (period_sz * periods) : period_sz;
+ buf_sz = PAGE_ALIGN(buf_sz);
+
+ cmd_size = sizeof(*cmd) + (sizeof(*mregions) * num_regions);
+ mmap_region_cmd = kzalloc(cmd_size, GFP_KERNEL);
+ if (!mmap_region_cmd)
+ return -ENOMEM;
+
+ cmd = mmap_region_cmd;
+
+ cmd->hdr.hdr_field = APR_SEQ_CMD_HDR_FIELD;
+ cmd->hdr.src_port = 0;
+ cmd->hdr.dest_port = 0;
+ cmd->hdr.pkt_size = cmd_size;
+ cmd->hdr.token = ((ac->session << 8) | dir);
+
+
+ cmd->hdr.opcode = ASM_CMD_SHARED_MEM_MAP_REGIONS;
+ cmd->mem_pool_id = ADSP_MEMORY_MAP_SHMEM8_4K_POOL;
+ cmd->num_regions = num_regions;
+ cmd->property_flag = 0x00;
+
+ mregions = mmap_region_cmd + sizeof(*cmd);
+
+ port = &ac->port[dir];
+
+ for (i = 0; i < num_regions; i++) {
+ ab = &port->buf[i];
+ mregions->shm_addr_lsw = lower_32_bits(ab->phys);
+ mregions->shm_addr_msw = upper_32_bits(ab->phys);
+ mregions->mem_size_bytes = buf_sz;
+ ++mregions;
+ }
+
+ rc = q6asm_apr_send_session_pkt(a, ac, mmap_region_cmd);
+
+ kfree(mmap_region_cmd);
+
+ return rc;
+}
+
+/**
+ * q6asm_map_memory_regions() - map memory regions in the dsp.
+ *
+ * @dir: direction of audio stream
+ * @ac: audio client instanace
+ * @phys: physcial address that needs mapping.
+ * @period_sz: audio period size
+ * @periods: number of periods
+ *
+ * Return: Will be an negative value on failure or zero on success
+ */
+int q6asm_map_memory_regions(unsigned int dir, struct audio_client *ac,
+ phys_addr_t phys,
+ size_t period_sz, unsigned int periods)
+{
+ struct audio_buffer *buf;
+ int cnt;
+ int rc;
+
+ mutex_lock(&ac->lock);
+
+ if (ac->port[dir].buf) {
+ dev_err(ac->dev, "Buffer already allocated\n");
+ rc = 0;
+ goto err;
+ }
+
+
+ buf = kzalloc(((sizeof(struct audio_buffer)) * periods), GFP_KERNEL);
+ if (!buf) {
+ rc = -ENOMEM;
+ goto err;
+ }
+
+
+ ac->port[dir].buf = buf;
+
+ buf[0].phys = phys;
+ buf[0].used = !!dir;
+ buf[0].size = period_sz;
+
+ for (cnt = 1; cnt < periods; cnt++) {
+ if (period_sz > 0) {
+ buf[cnt].phys = buf[0].phys + (cnt * period_sz);
+ buf[cnt].used = dir ^ 1;
+ buf[cnt].size = period_sz;
+ }
+ }
+
+ ac->port[dir].num_periods = periods;
+
+ rc = __q6asm_memory_map_regions(ac, dir, period_sz, periods, 1);
+ if (rc < 0) {
+ dev_err(ac->dev, "Memory_map_regions failed\n");
+ ac->port[dir].num_periods = 0;
+ kfree(buf);
+ ac->port[dir].buf = NULL;
+ goto err;
+ }
+
+err:
+ mutex_unlock(&ac->lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(q6asm_map_memory_regions);
+
/**
* q6asm_audio_client_free() - Freee allocated audio client
*
@@ -143,6 +413,48 @@ static int q6asm_srvc_callback(struct apr_device *adev,
return 0;
}

+ a = dev_get_drvdata(ac->dev);
+ dir = (data->token & 0x0F);
+ port = &ac->port[dir];
+
+ switch (data->opcode)
+ case APR_BASIC_RSP_RESULT: {
+ switch (result->opcode) {
+ case ASM_CMD_SHARED_MEM_MAP_REGIONS:
+ case ASM_CMD_SHARED_MEM_UNMAP_REGIONS:
+ if (result->status != 0) {
+ dev_err(ac->dev,
+ "cmd = 0x%x retur err= 0x%x sid:%d\n",
+ result->opcode, result->status, sid);
+ a->mem_state = -result->status;
+ } else {
+ a->mem_state = 0;
+ }
+
+ wake_up(&a->mem_wait);
+ break;
+ default:
+ dev_err(&adev->dev, "command[0x%x] not expecting rsp\n",
+ result->opcode);
+ break;
+ }
+ return 0;
+ case ASM_CMDRSP_SHARED_MEM_MAP_REGIONS:
+ a->mem_state = 0;
+ ac->port[dir].mem_map_handle = result->opcode;
+ wake_up(&a->mem_wait);
+ break;
+ case ASM_CMD_SHARED_MEM_UNMAP_REGIONS:
+ a->mem_state = 0;
+ ac->port[dir].mem_map_handle = 0;
+ wake_up(&a->mem_wait);
+ break;
+ default:
+ dev_dbg(&adev->dev, "command[0x%x]success [0x%x]\n",
+ result->opcode, result->status);
+ break;
+ }
+
if (ac->cb)
ac->cb(data->opcode, data->token, data->payload, ac->priv);

diff --git a/sound/soc/qcom/qdsp6/q6asm.h b/sound/soc/qcom/qdsp6/q6asm.h
index b13fe0d2ea61..a4f9fe636b7e 100644
--- a/sound/soc/qcom/qdsp6/q6asm.h
+++ b/sound/soc/qcom/qdsp6/q6asm.h
@@ -15,4 +15,9 @@ struct audio_client *q6asm_audio_client_alloc(struct device *dev,
int session_id);
void q6asm_audio_client_free(struct audio_client *ac);
int q6asm_get_session_id(struct audio_client *ac);
+int q6asm_map_memory_regions(unsigned int dir,
+ struct audio_client *ac,
+ phys_addr_t phys,
+ size_t bufsz, unsigned int bufcnt);
+int q6asm_unmap_memory_regions(unsigned int dir, struct audio_client *ac);
#endif /* __Q6_ASM_H__ */
--
2.15.1