redonkable/alistair23-linux
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mwifiex: device specific sleep cookie handling for PCIe

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This patch adds support for handling of PCIe sleep cookie depending
upon device properties. Some PCIe devices need sleep cookie probing
before accessing HW while some others don't. A new sleep_cookie
variable is defined as part of mwifiex_pcie_card_reg strcture and
set/reset as per device capability.

Sleep cookie is allocated/accessed/freed only when flag sleep_cookie
for this particular device is enabled.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Avinash Patil 2013-02-12 14:38:32 -08:00 committed by John W. Linville
parent 06e7cda3ce
commit 52301a815e
2 changed files with 25 additions and 8 deletions
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30
drivers/net/wireless/mwifiex/pcie.c
View file

@ -62,6 +62,10 @@ static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter)
{
u32 *cookie_addr;
struct pcie_service_card *card = adapter->card;
const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
if (!reg->sleep_cookie)
return true;
if (card->sleep_cookie_vbase) {
cookie_addr = (u32 *)card->sleep_cookie_vbase;
@ -299,8 +303,10 @@ static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data)
static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
{
int i = 0;
struct pcie_service_card *card = adapter->card;
const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
while (mwifiex_pcie_ok_to_access_hw(adapter)) {
while (reg->sleep_cookie && mwifiex_pcie_ok_to_access_hw(adapter)) {
i++;
usleep_range(10, 20);
/* 50ms max wait */
@ -1513,8 +1519,8 @@ static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter)
if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
mwifiex_process_sleep_confirm_resp(adapter, skb->data,
skb->len);
while (mwifiex_pcie_ok_to_access_hw(adapter) &&
(count++ < 10))
while (reg->sleep_cookie && (count++ < 10) &&
mwifiex_pcie_ok_to_access_hw(adapter))
usleep_range(50, 60);
} else {
dev_err(adapter->dev,
@ -2172,6 +2178,7 @@ static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
struct pcie_service_card *card = adapter->card;
int ret;
struct pci_dev *pdev = card->dev;
const struct mwifiex_pcie_card_reg *reg = card->pcie.reg;
pci_set_drvdata(pdev, card);
@ -2234,10 +2241,13 @@ static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
ret = mwifiex_pcie_alloc_cmdrsp_buf(adapter);
if (ret)
goto err_alloc_cmdbuf;
ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter);
if (ret)
goto err_alloc_cookie;
if (reg->sleep_cookie) {
ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter);
if (ret)
goto err_alloc_cookie;
} else {
card->sleep_cookie_vbase = NULL;
}
return ret;
err_alloc_cookie:
@ -2334,12 +2344,16 @@ static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
{
struct pcie_service_card *card = adapter->card;
const struct mwifiex_pcie_card_reg *reg;
if (card) {
dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__);
free_irq(card->dev->irq, card->dev);
mwifiex_pcie_delete_sleep_cookie_buf(adapter);
reg = card->pcie.reg;
if (reg->sleep_cookie)
mwifiex_pcie_delete_sleep_cookie_buf(adapter);
mwifiex_pcie_delete_cmdrsp_buf(adapter);
mwifiex_pcie_delete_evtbd_ring(adapter);
mwifiex_pcie_delete_rxbd_ring(adapter);

3
drivers/net/wireless/mwifiex/pcie.h
View file

@ -126,6 +126,7 @@ struct mwifiex_pcie_card_reg {
u8 ring_flag_xs_eop;
u32 ring_tx_start_ptr;
u8 pfu_enabled;
u8 sleep_cookie;
};
static const struct mwifiex_pcie_card_reg mwifiex_reg_8766 = {
@ -156,6 +157,7 @@ static const struct mwifiex_pcie_card_reg mwifiex_reg_8766 = {
.ring_flag_xs_eop = 0,
.ring_tx_start_ptr = 0,
.pfu_enabled = 0,
.sleep_cookie = 1,
};
static const struct mwifiex_pcie_card_reg mwifiex_reg_8897 = {
@ -186,6 +188,7 @@ static const struct mwifiex_pcie_card_reg mwifiex_reg_8897 = {
.ring_flag_xs_eop = MWIFIEX_BD_FLAG_XS_EOP,
.ring_tx_start_ptr = MWIFIEX_BD_FLAG_TX_START_PTR,
.pfu_enabled = 1,
.sleep_cookie = 0,
};
struct mwifiex_pcie_device {