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qcacld-3.0: protect rxhash history buffer for SMP

Browse source 
Add a spinlock to make sure that htt rx_hash history buffer will
not break under SMP conditions. Apply the lock on set and reset operations.
Add timestamp to each buffer entry (will store the time stamp of the last
operation on the entry).

Change-Id: If1dcab4ac331351cf2dcfbaa6cb24d453e7fdf50
CRs-Fixed: 1077047
(cherry picked from commit be2d6e14afdc142564bb9d7fbcc446c060b0d0d4)
This commit is contained in:
Orhan K AKYILDIZ 2016-10-13 22:24:12 -07:00 • committed by Gerrit - the friendly Code Review server
commit a8e2e6fd59
2 changed files with 25 additions and 4 deletions
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28
core/dp/htt/htt_internal.h
View file

@ -135,8 +135,10 @@ struct htt_host_rx_desc_base {
struct rx_buf_debug {
qdf_dma_addr_t paddr;
qdf_nbuf_t nbuf;
void *nbuf_data;
bool in_use;
void *nbuf_data; /* lsb of this field is used for "in_use" */
/* bool in_use; */
uint64_t ts; /* timestamp */
};
#endif
@ -619,6 +621,8 @@ void htt_rx_dbg_rxbuf_init(struct htt_pdev_t *pdev)
if (!pdev->rx_buff_list) {
qdf_print("HTT: debug RX buffer allocation failed\n");
QDF_ASSERT(0);
} else {
qdf_spinlock_create(&(pdev->rx_buff_list_lock));
}
}
@ -634,16 +638,24 @@ static inline
void htt_rx_dbg_rxbuf_set(struct htt_pdev_t *pdev, qdf_dma_addr_t paddr,
qdf_nbuf_t rx_netbuf)
{
void *tmp;
if (pdev->rx_buff_list) {
qdf_spin_lock_bh(&(pdev->rx_buff_list_lock));
pdev->rx_buff_list[pdev->rx_buff_index].paddr = paddr;
pdev->rx_buff_list[pdev->rx_buff_index].in_use = true;
pdev->rx_buff_list[pdev->rx_buff_index].nbuf_data =
rx_netbuf->data;
/* pdev->rx_buff_list[pdev->rx_buff_index].in_use = true; */
tmp = pdev->rx_buff_list[pdev->rx_buff_index].nbuf_data;
tmp = (void *)((uint64_t) tmp | 0x01);
pdev->rx_buff_list[pdev->rx_buff_index].nbuf_data = tmp;
pdev->rx_buff_list[pdev->rx_buff_index].nbuf = rx_netbuf;
pdev->rx_buff_list[pdev->rx_buff_index].ts =
qdf_get_log_timestamp();
NBUF_MAP_ID(rx_netbuf) = pdev->rx_buff_index;
if (++pdev->rx_buff_index ==
HTT_RX_RING_BUFF_DBG_LIST)
pdev->rx_buff_index = 0;
qdf_spin_unlock_bh(&(pdev->rx_buff_list_lock));
}
}
@ -658,12 +670,20 @@ void htt_rx_dbg_rxbuf_reset(struct htt_pdev_t *pdev,
qdf_nbuf_t netbuf)
{
uint32_t index;
void *tmp;
if (pdev->rx_buff_list) {
qdf_spin_lock_bh(&(pdev->rx_buff_list_lock));
index = NBUF_MAP_ID(netbuf);
if (index < HTT_RX_RING_BUFF_DBG_LIST) {
pdev->rx_buff_list[index].in_use = false;
/* in_use = false */
tmp = pdev->rx_buff_list[index].nbuf_data;
tmp = (void *)((uint64_t)tmp & 0xfffffffffffffffe);
pdev->rx_buff_list[index].nbuf_data = tmp;
pdev->rx_buff_list[index].ts =
qdf_get_log_timestamp();
}
qdf_spin_unlock_bh(&(pdev->rx_buff_list_lock));
}
}
/**

1
core/dp/htt/htt_types.h
View file

@ -411,6 +411,7 @@ struct htt_pdev_t {
#ifdef DEBUG_RX_RING_BUFFER
struct rx_buf_debug *rx_buff_list;
qdf_spinlock_t rx_buff_list_lock;
int rx_buff_index;
#endif