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soc: qcom: mem-buf: Use an unbound high priority workqueue for mem-buf

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Use an unbound high priority workqueue to ensure that mem-buf
transactions can be handled on any CPU, as well as with high
priority. Also, increase the timeout for allocation responses
from 2 seconds to 3.5 seconds.

Change-Id: I2ec4d85bf7307d64d2f8a7dae6dfb2b29cfc45bb
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Isaac J. Manjarres 2020-08-17 16:39:11 -07:00
commit 7fd846f325
1 changed files with 16 additions and 3 deletions
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19
drivers/soc/qcom/mem-buf.c
View file

@ -34,7 +34,7 @@
#define MEM_BUF_MAX_DEVS 1
#define MEM_BUF_MHP_ALIGNMENT (1UL << SUBSECTION_SHIFT)
#define MEM_BUF_TIMEOUT_MS 2000
#define MEM_BUF_TIMEOUT_MS 3500
#define to_rmt_msg(_work) container_of(_work, struct mem_buf_rmt_msg, work)
#define MEM_BUF_CAP_SUPPLIER BIT(0)
@ -59,6 +59,7 @@ static DEFINE_IDR(mem_buf_txn_idr);
static struct task_struct *mem_buf_msgq_recv_thr;
static void *mem_buf_hh_msgq_hdl;
static unsigned char mem_buf_capability;
static struct workqueue_struct *mem_buf_wq;
/**
* struct mem_buf_txn: Represents a transaction (request/response pair) in the
@ -782,7 +783,7 @@ static void mem_buf_process_msg(void *buf, size_t size)
work_fn = hdr->msg_type == MEM_BUF_ALLOC_REQ ?
mem_buf_alloc_req_work : mem_buf_relinquish_work;
INIT_WORK(&rmt_msg->work, work_fn);
schedule_work(&rmt_msg->work);
queue_work(mem_buf_wq, &rmt_msg->work);
} else {
pr_err("%s: received message of unknown type: %d\n", __func__,
hdr->msg_type);
@ -2124,12 +2125,19 @@ static int mem_buf_probe(struct platform_device *pdev)
return ret;
}
mem_buf_wq = alloc_workqueue("mem_buf_wq", WQ_HIGHPRI | WQ_UNBOUND, 0);
if (!mem_buf_wq) {
dev_err(dev, "Unable to initialize workqueue\n");
return -EINVAL;
}
mem_buf_msgq_recv_thr = kthread_create(mem_buf_msgq_recv_fn, NULL,
"mem_buf_rcvr");
if (IS_ERR(mem_buf_msgq_recv_thr)) {
dev_err(dev, "Failed to create msgq receiver thread rc: %d\n",
PTR_ERR(mem_buf_msgq_recv_thr));
return PTR_ERR(mem_buf_msgq_recv_thr);
ret = PTR_ERR(mem_buf_msgq_recv_thr);
goto err_kthread_create;
}
mem_buf_hh_msgq_hdl = hh_msgq_register(HH_MSGQ_LABEL_MEMBUF);
@ -2167,6 +2175,9 @@ err_cdev_add:
err_msgq_register:
kthread_stop(mem_buf_msgq_recv_thr);
mem_buf_msgq_recv_thr = NULL;
err_kthread_create:
destroy_workqueue(mem_buf_wq);
mem_buf_wq = NULL;
return ret;
}
@ -2191,6 +2202,8 @@ static int mem_buf_remove(struct platform_device *pdev)
mem_buf_hh_msgq_hdl = NULL;
kthread_stop(mem_buf_msgq_recv_thr);
mem_buf_msgq_recv_thr = NULL;
destroy_workqueue(mem_buf_wq);
mem_buf_wq = NULL;
return 0;
}