diff options
| author | Dedy Lansky <dlansky@codeaurora.org> | 2019-09-10 16:46:24 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2019-09-12 18:06:32 +0300 |
| commit | 977c45ab5f4190bc9ee08ce03e501f73082e3c68 (patch) | |
| tree | 18393dafb609464a417e8d41d484d6d7b1105a3a /drivers/net/wireless/ath/wil6210/pmc.c | |
| parent | f99fe49ff3729be7bbdf0d9336e78db94de8a873 (diff) | |
| download | linux-977c45ab5f4190bc9ee08ce03e501f73082e3c68.tar.bz2 | |
wil6210: add debugfs to show PMC ring content
PMC is a hardware debug mechanism which allows capturing real time
debug data and stream it to host memory. The driver allocates memory
buffers and set them inside PMC ring of descriptors.
Add pmcring debugfs that application can use to read the binary
content of descriptors inside the PMC ring (cat pmcring).
Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/wil6210/pmc.c')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/pmc.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/pmc.c b/drivers/net/wireless/ath/wil6210/pmc.c index c49f7988369e..4b7ac14fc2a7 100644 --- a/drivers/net/wireless/ath/wil6210/pmc.c +++ b/drivers/net/wireless/ath/wil6210/pmc.c @@ -18,6 +18,7 @@ #include <linux/types.h> #include <linux/errno.h> #include <linux/fs.h> +#include <linux/seq_file.h> #include "wmi.h" #include "wil6210.h" #include "txrx.h" @@ -431,3 +432,28 @@ out: return newpos; } + +int wil_pmcring_read(struct seq_file *s, void *data) +{ + struct wil6210_priv *wil = s->private; + struct pmc_ctx *pmc = &wil->pmc; + size_t pmc_ring_size = + sizeof(struct vring_rx_desc) * pmc->num_descriptors; + + mutex_lock(&pmc->lock); + + if (!wil_is_pmc_allocated(pmc)) { + wil_err(wil, "error, pmc is not allocated!\n"); + pmc->last_cmd_status = -EPERM; + mutex_unlock(&pmc->lock); + return -EPERM; + } + + wil_dbg_misc(wil, "pmcring_read: size %zu\n", pmc_ring_size); + + seq_write(s, pmc->pring_va, pmc_ring_size); + + mutex_unlock(&pmc->lock); + + return 0; +} |