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ath10k: allow explicit MSI/MSI-X disabling

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This can be useful for testing and debugging.

This introduces new ath10k_pci module parameter
`irq_mode`. By default it is 0, meaning automatic
irq mode (MSI-X as long as both target HW and host
platform supports it). The parameter works on a
best effort basis.

kvalo: fix typo "ayto"

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Michal Kazior
2013-11-25 14:06:27 +01:00
committed by Kalle Valo
parent ab977bd04b
commit cfe9c45b21
1 changed files with 34 additions and 13 deletions
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47
drivers/net/wireless/ath/ath10k/pci.c
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@@ -33,10 +33,21 @@
#include "ce.h" #include "ce.h"
#include "pci.h" #include "pci.h"
enum ath10k_pci_irq_mode {
ATH10K_PCI_IRQ_AUTO = 0,
ATH10K_PCI_IRQ_LEGACY = 1,
ATH10K_PCI_IRQ_MSI = 2,
};
static unsigned int ath10k_target_ps; static unsigned int ath10k_target_ps;
static unsigned int ath10k_pci_irq_mode = ATH10K_PCI_IRQ_AUTO;
module_param(ath10k_target_ps, uint, 0644); module_param(ath10k_target_ps, uint, 0644);
MODULE_PARM_DESC(ath10k_target_ps, "Enable ath10k Target (SoC) PS option"); MODULE_PARM_DESC(ath10k_target_ps, "Enable ath10k Target (SoC) PS option");
module_param_named(irq_mode, ath10k_pci_irq_mode, uint, 0644);
MODULE_PARM_DESC(irq_mode, "0: auto, 1: legacy, 2: msi (default: 0)");
#define QCA988X_2_0_DEVICE_ID (0x003c) #define QCA988X_2_0_DEVICE_ID (0x003c)
static DEFINE_PCI_DEVICE_TABLE(ath10k_pci_id_table) = { static DEFINE_PCI_DEVICE_TABLE(ath10k_pci_id_table) = {
@@ -2387,27 +2398,37 @@ static void ath10k_pci_init_irq_tasklets(struct ath10k *ar)
static int ath10k_pci_init_irq(struct ath10k *ar) static int ath10k_pci_init_irq(struct ath10k *ar)
{ {
struct ath10k_pci *ar_pci = ath10k_pci_priv(ar); struct ath10k_pci *ar_pci = ath10k_pci_priv(ar);
bool msix_supported = test_bit(ATH10K_PCI_FEATURE_MSI_X,
ar_pci->features);
int ret; int ret;
ath10k_pci_init_irq_tasklets(ar); ath10k_pci_init_irq_tasklets(ar);
if (!test_bit(ATH10K_PCI_FEATURE_MSI_X, ar_pci->features)) if (ath10k_pci_irq_mode != ATH10K_PCI_IRQ_AUTO &&
goto msi; !test_bit(ATH10K_FLAG_FIRST_BOOT_DONE, &ar->dev_flags))
ath10k_info("limiting irq mode to: %d\n", ath10k_pci_irq_mode);
/* Try MSI-X */ /* Try MSI-X */
ar_pci->num_msi_intrs = MSI_NUM_REQUEST; if (ath10k_pci_irq_mode == ATH10K_PCI_IRQ_AUTO && msix_supported) {
ret = pci_enable_msi_block(ar_pci->pdev, ar_pci->num_msi_intrs); ar_pci->num_msi_intrs = MSI_NUM_REQUEST;
if (ret == 0) ret = pci_enable_msi_block(ar_pci->pdev, ar_pci->num_msi_intrs);
return 0; if (ret == 0)
if (ret > 0) return 0;
pci_disable_msi(ar_pci->pdev); if (ret > 0)
pci_disable_msi(ar_pci->pdev);
/* fall-through */
}
msi:
/* Try MSI */ /* Try MSI */
ar_pci->num_msi_intrs = 1; if (ath10k_pci_irq_mode != ATH10K_PCI_IRQ_LEGACY) {
ret = pci_enable_msi(ar_pci->pdev); ar_pci->num_msi_intrs = 1;
if (ret == 0) ret = pci_enable_msi(ar_pci->pdev);
return 0; if (ret == 0)
return 0;
/* fall-through */
}
/* Try legacy irq /* Try legacy irq
* *