diag_read() is used for reading from firmware memory via the diagnose window.
First user will be cal_data debugfs file.
To serialise diagnostic window access and make it safe to use while firmware is
running take ce_lock both in ath10k_pci_diag_write_mem() and
ath10k_pci_diag_read_mem(). Because of that all the CE calls had to be changed
to _nolock variants.
Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath10k/ce.c | 22 +++++++-------
drivers/net/wireless/ath/ath10k/ce.h | 13 ++++++++
drivers/net/wireless/ath/ath10k/hif.h | 10 ++++++
drivers/net/wireless/ath/ath10k/pci.c | 51 +++++++++++++++++++++------------
4 files changed, 67 insertions(+), 29 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/ce.c b/drivers/net/wireless/ath/ath10k/ce.c
index 09ef03e7af89..4745ef2a6f01 100644
--- a/drivers/net/wireless/ath/ath10k/ce.c
+++ b/drivers/net/wireless/ath/ath10k/ce.c
@@ -443,12 +443,12 @@ int ath10k_ce_rx_post_buf(struct ath10k_ce_pipe *pipe, void *ctx, u32 paddr)
* Guts of ath10k_ce_completed_recv_next.
* The caller takes responsibility for any necessary locking.
*/
-static int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
- void **per_transfer_contextp,
- u32 *bufferp,
- unsigned int *nbytesp,
- unsigned int *transfer_idp,
- unsigned int *flagsp)
+int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp,
+ unsigned int *flagsp)
{
struct ath10k_ce_ring *dest_ring = ce_state->dest_ring;
unsigned int nentries_mask = dest_ring->nentries_mask;
@@ -576,11 +576,11 @@ int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
* Guts of ath10k_ce_completed_send_next.
* The caller takes responsibility for any necessary locking.
*/
-static int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
- void **per_transfer_contextp,
- u32 *bufferp,
- unsigned int *nbytesp,
- unsigned int *transfer_idp)
+int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp)
{
struct ath10k_ce_ring *src_ring = ce_state->src_ring;
u32 ctrl_addr = ce_state->ctrl_addr;
diff --git a/drivers/net/wireless/ath/ath10k/ce.h b/drivers/net/wireless/ath/ath10k/ce.h
index 329b7340fa72..608262ab964e 100644
--- a/drivers/net/wireless/ath/ath10k/ce.h
+++ b/drivers/net/wireless/ath/ath10k/ce.h
@@ -192,6 +192,12 @@ int ath10k_ce_completed_send_next(struct ath10k_ce_pipe *ce_state,
unsigned int *nbytesp,
unsigned int *transfer_idp);
+int ath10k_ce_completed_send_next_nolock(struct ath10k_ce_pipe *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp);
+
/*==================CE Engine Initialization=======================*/
int ath10k_ce_init_pipe(struct ath10k *ar, unsigned int ce_id,
@@ -213,6 +219,13 @@ int ath10k_ce_revoke_recv_next(struct ath10k_ce_pipe *ce_state,
void **per_transfer_contextp,
u32 *bufferp);
+int ath10k_ce_completed_recv_next_nolock(struct ath10k_ce_pipe *ce_state,
+ void **per_transfer_contextp,
+ u32 *bufferp,
+ unsigned int *nbytesp,
+ unsigned int *transfer_idp,
+ unsigned int *flagsp);
+
/*
* Support clean shutdown by allowing the caller to cancel
* pending sends. Target DMA must be stopped before using
diff --git a/drivers/net/wireless/ath/ath10k/hif.h b/drivers/net/wireless/ath/ath10k/hif.h
index 62323fea27e1..30301f5b6051 100644
--- a/drivers/net/wireless/ath/ath10k/hif.h
+++ b/drivers/net/wireless/ath/ath10k/hif.h
@@ -43,6 +43,10 @@ struct ath10k_hif_ops {
int (*tx_sg)(struct ath10k *ar, u8 pipe_id,
struct ath10k_hif_sg_item *items, int n_items);
+ /* read firmware memory through the diagnose interface */
+ int (*diag_read)(struct ath10k *ar, u32 address, void *buf,
+ size_t buf_len);
+
/*
* API to handle HIF-specific BMI message exchanges, this API is
* synchronous and only allowed to be called from a context that
@@ -98,6 +102,12 @@ static inline int ath10k_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
return ar->hif.ops->tx_sg(ar, pipe_id, items, n_items);
}
+static inline int ath10k_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
+ size_t buf_len)
+{
+ return ar->hif.ops->diag_read(ar, address, buf, buf_len);
+}
+
static inline int ath10k_hif_exchange_bmi_msg(struct ath10k *ar,
void *request, u32 request_len,
void *response, u32 *response_len)
diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c
index 59e0ea83be50..0784b48b04ce 100644
--- a/drivers/net/wireless/ath/ath10k/pci.c
+++ b/drivers/net/wireless/ath/ath10k/pci.c
@@ -485,6 +485,8 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
void *data_buf = NULL;
int i;
+ spin_lock_bh(&ar_pci->ce_lock);
+
ce_diag = ar_pci->ce_diag;
/*
@@ -511,7 +513,7 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
nbytes = min_t(unsigned int, remaining_bytes,
DIAG_TRANSFER_LIMIT);
- ret = ath10k_ce_rx_post_buf(ce_diag, NULL, ce_data);
+ ret = __ath10k_ce_rx_post_buf(ce_diag, NULL, ce_data);
if (ret != 0)
goto done;
@@ -527,15 +529,15 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
address = TARG_CPU_SPACE_TO_CE_SPACE(ar, ar_pci->mem,
address);
- ret = ath10k_ce_send(ce_diag, NULL, (u32)address, nbytes, 0,
- 0);
+ ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)address, nbytes, 0,
+ 0);
if (ret)
goto done;
i = 0;
- while (ath10k_ce_completed_send_next(ce_diag, NULL, &buf,
- &completed_nbytes,
- &id) != 0) {
+ while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
+ &completed_nbytes,
+ &id) != 0) {
mdelay(1);
if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
ret = -EBUSY;
@@ -554,9 +556,9 @@ static int ath10k_pci_diag_read_mem(struct ath10k *ar, u32 address, void *data,
}
i = 0;
- while (ath10k_ce_completed_recv_next(ce_diag, NULL, &buf,
- &completed_nbytes,
- &id, &flags) != 0) {
+ while (ath10k_ce_completed_recv_next_nolock(ce_diag, NULL, &buf,
+ &completed_nbytes,
+ &id, &flags) != 0) {
mdelay(1);
if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
@@ -591,6 +593,8 @@ done:
dma_free_coherent(ar->dev, orig_nbytes, data_buf,
ce_data_base);
+ spin_unlock_bh(&ar_pci->ce_lock);
+
return ret;
}
@@ -648,6 +652,8 @@ static int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
dma_addr_t ce_data_base = 0;
int i;
+ spin_lock_bh(&ar_pci->ce_lock);
+
ce_diag = ar_pci->ce_diag;
/*
@@ -688,7 +694,7 @@ static int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
nbytes = min_t(int, remaining_bytes, DIAG_TRANSFER_LIMIT);
/* Set up to receive directly into Target(!) address */
- ret = ath10k_ce_rx_post_buf(ce_diag, NULL, address);
+ ret = __ath10k_ce_rx_post_buf(ce_diag, NULL, address);
if (ret != 0)
goto done;
@@ -696,15 +702,15 @@ static int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
* Request CE to send caller-supplied data that
* was copied to bounce buffer to Target(!) address.
*/
- ret = ath10k_ce_send(ce_diag, NULL, (u32)ce_data,
- nbytes, 0, 0);
+ ret = ath10k_ce_send_nolock(ce_diag, NULL, (u32)ce_data,
+ nbytes, 0, 0);
if (ret != 0)
goto done;
i = 0;
- while (ath10k_ce_completed_send_next(ce_diag, NULL, &buf,
- &completed_nbytes,
- &id) != 0) {
+ while (ath10k_ce_completed_send_next_nolock(ce_diag, NULL, &buf,
+ &completed_nbytes,
+ &id) != 0) {
mdelay(1);
if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
@@ -724,9 +730,9 @@ static int ath10k_pci_diag_write_mem(struct ath10k *ar, u32 address,
}
i = 0;
- while (ath10k_ce_completed_recv_next(ce_diag, NULL, &buf,
- &completed_nbytes,
- &id, &flags) != 0) {
+ while (ath10k_ce_completed_recv_next_nolock(ce_diag, NULL, &buf,
+ &completed_nbytes,
+ &id, &flags) != 0) {
mdelay(1);
if (i++ > DIAG_ACCESS_CE_TIMEOUT_MS) {
@@ -760,6 +766,8 @@ done:
ath10k_warn(ar, "failed to write diag value at 0x%x: %d\n",
address, ret);
+ spin_unlock_bh(&ar_pci->ce_lock);
+
return ret;
}
@@ -936,6 +944,12 @@ err:
return err;
}
+static int ath10k_pci_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
+ size_t buf_len)
+{
+ return ath10k_pci_diag_read_mem(ar, address, buf, buf_len);
+}
+
static u16 ath10k_pci_hif_get_free_queue_number(struct ath10k *ar, u8 pipe)
{
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
@@ -1921,6 +1935,7 @@ static int ath10k_pci_hif_resume(struct ath10k *ar)
static const struct ath10k_hif_ops ath10k_pci_hif_ops = {
.tx_sg = ath10k_pci_hif_tx_sg,
+ .diag_read = ath10k_pci_hif_diag_read,
.exchange_bmi_msg = ath10k_pci_hif_exchange_bmi_msg,
.start = ath10k_pci_hif_start,
.stop = ath10k_pci_hif_stop,
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
