From 52301a815e81cdcbcf971ba28df0376dc7f3961c Mon Sep 17 00:00:00 2001 From: Avinash Patil Date: Tue, 12 Feb 2013 14:38:32 -0800 Subject: [PATCH] mwifiex: device specific sleep cookie handling for PCIe 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 Signed-off-by: Bing Zhao Signed-off-by: John W. Linville --- drivers/net/wireless/mwifiex/pcie.c | 30 ++++++++++++++++++++++-------- drivers/net/wireless/mwifiex/pcie.h | 3 +++ 2 files changed, 25 insertions(+), 8 deletions(-) diff --git a/drivers/net/wireless/mwifiex/pcie.c b/drivers/net/wireless/mwifiex/pcie.c index 3b9be7c..492655c0 100644 --- a/drivers/net/wireless/mwifiex/pcie.c +++ b/drivers/net/wireless/mwifiex/pcie.c @@ -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); diff --git a/drivers/net/wireless/mwifiex/pcie.h b/drivers/net/wireless/mwifiex/pcie.h index 6080615..d322ab8 100644 --- a/drivers/net/wireless/mwifiex/pcie.h +++ b/drivers/net/wireless/mwifiex/pcie.h @@ -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 { -- 2.7.4