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qtnfmac: enable reloading of qtnfmac kernel modules 

This patch enables rmmod/insmod for qtnfmac kernel modules:
- do not 'pin' pci device in order to disable it on module unload
- implement card reset procedure
- restore PCI bar addresses for restarted wireless card

Signed-off-by: Sergei Maksimenko <smaksimenko@quantenna.com>
Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Sergei Maksimenko 2018-02-10 17:04:18 +03:00 committed by Kalle Valo
parent 1d5e3b90ab
commit a34d7bcb73
3 changed files with 16 additions and 1 deletions
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15
drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c
View File

@ -162,6 +162,17 @@ static void qtnf_deassert_intx(struct qtnf_pcie_bus_priv *priv)
qtnf_non_posted_write(cfg, reg);
}
static void qtnf_reset_card(struct qtnf_pcie_bus_priv *priv)
{
const u32 data = QTN_PEARL_IPC_IRQ_WORD(QTN_PEARL_LHOST_EP_RESET);
void __iomem *reg = priv->sysctl_bar +
QTN_PEARL_SYSCTL_LHOST_IRQ_OFFSET;
qtnf_non_posted_write(data, reg);
msleep(QTN_EP_RESET_WAIT_MS);
pci_restore_state(priv->pdev);
}
static void qtnf_ipc_gen_ep_int(void *arg)
{
const struct qtnf_pcie_bus_priv *priv = arg;
@ -1308,7 +1319,6 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_base;
}
pcim_pin_device(pdev);
pci_set_master(pdev);
ret = qtnf_pcie_init_irq(pcie_priv);
@ -1323,6 +1333,8 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_base;
}
pci_save_state(pdev);
ret = qtnf_pcie_init_shm_ipc(pcie_priv);
if (ret < 0) {
pr_err("PCIE SHM IPC init failed\n");
@ -1425,6 +1437,7 @@ static void qtnf_pcie_remove(struct pci_dev *pdev)
qtnf_debugfs_remove(bus);
qtnf_pcie_free_shm_ipc(priv);
qtnf_reset_card(priv);
}
#ifdef CONFIG_PM_SLEEP

1
drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h
View File

@ -46,6 +46,7 @@
/* state transition timeouts */
#define QTN_FW_DL_TIMEOUT_MS 3000
#define QTN_FW_QLINK_TIMEOUT_MS 30000
#define QTN_EP_RESET_WAIT_MS 1000
#define PCIE_HDP_INT_RX_BITS (0 \
| PCIE_HDP_INT_EP_TXDMA \

1
drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h
View File

@ -351,5 +351,6 @@
#define QTN_PEARL_IPC_IRQ_WORD(irq) (BIT(irq) | BIT(irq + 16))
#define QTN_PEARL_LHOST_IPC_IRQ (6)
#define QTN_PEARL_LHOST_EP_RESET (7)
#endif /* __PEARL_PCIE_H */