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ath9k: Add functions to allocate/free buffers for MCI

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required buffers and dma allocation is done for GPM and SCHED
messages

Cc: Wilson Tsao <wtsao@qca.qualcomm.com>
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mohammed Shafi Shajakhan 2011-11-30 10:41:23 +05:30 committed by John W. Linville
parent f2f2185679
commit 9e25365ffa
3 changed files with 81 additions and 0 deletions
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1
drivers/net/wireless/ath/ath9k/ath9k.h
View file

@ -647,6 +647,7 @@ struct ath_softc {
struct delayed_work tx_complete_work;
struct delayed_work hw_pll_work;
struct ath_btcoex btcoex;
struct ath_mci_coex mci_coex;
struct ath_descdma txsdma;

78
drivers/net/wireless/ath/ath9k/mci.c
View file

@ -14,6 +14,9 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include "ath9k.h"
#include "mci.h"
@ -252,3 +255,78 @@ void ath_mci_process_status(struct ath_softc *sc,
if (old_num_mgmt != mci->num_mgmt)
ath_mci_update_scheme(sc);
}
static int ath_mci_buf_alloc(struct ath_softc *sc, struct ath_mci_buf *buf)
{
int error = 0;
buf->bf_addr = dma_alloc_coherent(sc->dev, buf->bf_len,
&buf->bf_paddr, GFP_KERNEL);
if (buf->bf_addr == NULL) {
error = -ENOMEM;
goto fail;
}
return 0;
fail:
memset(buf, 0, sizeof(*buf));
return error;
}
static void ath_mci_buf_free(struct ath_softc *sc, struct ath_mci_buf *buf)
{
if (buf->bf_addr) {
dma_free_coherent(sc->dev, buf->bf_len, buf->bf_addr,
buf->bf_paddr);
memset(buf, 0, sizeof(*buf));
}
}
int ath_mci_setup(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_mci_coex *mci = &sc->mci_coex;
int error = 0;
mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE;
if (ath_mci_buf_alloc(sc, &mci->sched_buf)) {
ath_dbg(common, ATH_DBG_FATAL, "MCI buffer alloc failed\n");
error = -ENOMEM;
goto fail;
}
mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
memset(mci->sched_buf.bf_addr, MCI_GPM_RSVD_PATTERN,
mci->sched_buf.bf_len);
mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr +
mci->sched_buf.bf_len;
mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
/* initialize the buffer */
memset(mci->gpm_buf.bf_addr, MCI_GPM_RSVD_PATTERN, mci->gpm_buf.bf_len);
ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
mci->sched_buf.bf_paddr);
fail:
return error;
}
void ath_mci_cleanup(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_mci_coex *mci = &sc->mci_coex;
/*
* both schedule and gpm buffers will be released
*/
ath_mci_buf_free(sc, &mci->sched_buf);
ar9003_mci_cleanup(ah);
}

2
drivers/net/wireless/ath/ath9k/mci.h
View file

@ -132,4 +132,6 @@ void ath_mci_process_profile(struct ath_softc *sc,
struct ath_mci_profile_info *info);
void ath_mci_process_status(struct ath_softc *sc,
struct ath_mci_profile_status *status);
int ath_mci_setup(struct ath_softc *sc);
void ath_mci_cleanup(struct ath_softc *sc);
#endif