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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
*/
#include <linux/module.h>
#include <linux/msi.h>
#include <linux/pci.h>
#include "pci.h"
#include "core.h"
#include "debug.h"
#define ATH11K_PCI_BAR_NUM 0
#define ATH11K_PCI_DMA_MASK 32
#define QCA6390_DEVICE_ID 0x1101
static const struct pci_device_id ath11k_pci_id_table[] = {
{ PCI_VDEVICE(QCOM, QCA6390_DEVICE_ID) },
{0}
};
MODULE_DEVICE_TABLE(pci, ath11k_pci_id_table);
static const struct ath11k_msi_config msi_config = {
.total_vectors = 32,
.total_users = 4,
.users = (struct ath11k_msi_user[]) {
{ .name = "MHI", .num_vectors = 3, .base_vector = 0 },
{ .name = "CE", .num_vectors = 10, .base_vector = 3 },
{ .name = "WAKE", .num_vectors = 1, .base_vector = 13 },
{ .name = "DP", .num_vectors = 18, .base_vector = 14 },
},
};
static int ath11k_pci_enable_msi(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
struct msi_desc *msi_desc;
int num_vectors;
int ret;
num_vectors = pci_alloc_irq_vectors(ab_pci->pdev,
msi_config.total_vectors,
msi_config.total_vectors,
PCI_IRQ_MSI);
if (num_vectors != msi_config.total_vectors) {
ath11k_err(ab, "failed to get %d MSI vectors, only %d available",
msi_config.total_vectors, num_vectors);
if (num_vectors >= 0)
return -EINVAL;
else
return num_vectors;
}
msi_desc = irq_get_msi_desc(ab_pci->pdev->irq);
if (!msi_desc) {
ath11k_err(ab, "msi_desc is NULL!\n");
ret = -EINVAL;
goto free_msi_vector;
}
ab_pci->msi_ep_base_data = msi_desc->msg.data;
ath11k_dbg(ab, ATH11K_DBG_PCI, "msi base data is %d\n", ab_pci->msi_ep_base_data);
return 0;
free_msi_vector:
pci_free_irq_vectors(ab_pci->pdev);
return ret;
}
static void ath11k_pci_disable_msi(struct ath11k_pci *ab_pci)
{
pci_free_irq_vectors(ab_pci->pdev);
}
static int ath11k_pci_claim(struct ath11k_pci *ab_pci, struct pci_dev *pdev)
{
struct ath11k_base *ab = ab_pci->ab;
u16 device_id;
int ret = 0;
pci_read_config_word(pdev, PCI_DEVICE_ID, &device_id);
if (device_id != ab_pci->dev_id) {
ath11k_err(ab, "pci device id mismatch: 0x%x 0x%x\n",
device_id, ab_pci->dev_id);
ret = -EIO;
goto out;
}
ret = pci_assign_resource(pdev, ATH11K_PCI_BAR_NUM);
if (ret) {
ath11k_err(ab, "failed to assign pci resource: %d\n", ret);
goto out;
}
ret = pci_enable_device(pdev);
if (ret) {
ath11k_err(ab, "failed to enable pci device: %d\n", ret);
goto out;
}
ret = pci_request_region(pdev, ATH11K_PCI_BAR_NUM, "ath11k_pci");
if (ret) {
ath11k_err(ab, "failed to request pci region: %d\n", ret);
goto disable_device;
}
ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(ATH11K_PCI_DMA_MASK));
if (ret) {
ath11k_err(ab, "failed to set pci dma mask to %d: %d\n",
ATH11K_PCI_DMA_MASK, ret);
goto release_region;
}
ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(ATH11K_PCI_DMA_MASK));
if (ret) {
ath11k_err(ab, "failed to set pci consistent dma mask to %d: %d\n",
ATH11K_PCI_DMA_MASK, ret);
goto release_region;
}
pci_set_master(pdev);
ab->mem_len = pci_resource_len(pdev, ATH11K_PCI_BAR_NUM);
ab->mem = pci_iomap(pdev, ATH11K_PCI_BAR_NUM, 0);
if (!ab->mem) {
ath11k_err(ab, "failed to map pci bar %d\n", ATH11K_PCI_BAR_NUM);
ret = -EIO;
goto clear_master;
}
ath11k_dbg(ab, ATH11K_DBG_BOOT, "boot pci_mem 0x%pK\n", ab->mem);
return 0;
clear_master:
pci_clear_master(pdev);
release_region:
pci_release_region(pdev, ATH11K_PCI_BAR_NUM);
disable_device:
pci_disable_device(pdev);
out:
return ret;
}
static void ath11k_pci_free_region(struct ath11k_pci *ab_pci)
{
struct ath11k_base *ab = ab_pci->ab;
struct pci_dev *pci_dev = ab_pci->pdev;
pci_iounmap(pci_dev, ab->mem);
ab->mem = NULL;
pci_clear_master(pci_dev);
pci_release_region(pci_dev, ATH11K_PCI_BAR_NUM);
if (pci_is_enabled(pci_dev))
pci_disable_device(pci_dev);
}
static int ath11k_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_dev)
{
struct ath11k_base *ab;
struct ath11k_pci *ab_pci;
enum ath11k_hw_rev hw_rev;
int ret;
dev_warn(&pdev->dev, "WARNING: ath11k PCI support is experimental!\n");
switch (pci_dev->device) {
case QCA6390_DEVICE_ID:
hw_rev = ATH11K_HW_QCA6390_HW20;
break;
default:
dev_err(&pdev->dev, "Unknown PCI device found: 0x%x\n",
pci_dev->device);
return -ENOTSUPP;
}
ab = ath11k_core_alloc(&pdev->dev, sizeof(*ab_pci), ATH11K_BUS_PCI);
if (!ab) {
dev_err(&pdev->dev, "failed to allocate ath11k base\n");
return -ENOMEM;
}
ab->dev = &pdev->dev;
ab->hw_rev = hw_rev;
pci_set_drvdata(pdev, ab);
ab_pci = ath11k_pci_priv(ab);
ab_pci->dev_id = pci_dev->device;
ab_pci->ab = ab;
ab_pci->pdev = pdev;
pci_set_drvdata(pdev, ab);
ret = ath11k_pci_claim(ab_pci, pdev);
if (ret) {
ath11k_err(ab, "failed to claim device: %d\n", ret);
goto err_free_core;
}
ret = ath11k_pci_enable_msi(ab_pci);
if (ret) {
ath11k_err(ab, "failed to enable msi: %d\n", ret);
goto err_pci_free_region;
}
ret = ath11k_core_pre_init(ab);
if (ret)
goto err_pci_disable_msi;
return 0;
err_pci_disable_msi:
ath11k_pci_disable_msi(ab_pci);
err_pci_free_region:
ath11k_pci_free_region(ab_pci);
err_free_core:
ath11k_core_free(ab);
return ret;
}
static void ath11k_pci_remove(struct pci_dev *pdev)
{
struct ath11k_base *ab = pci_get_drvdata(pdev);
struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
ath11k_pci_disable_msi(ab_pci);
ath11k_pci_free_region(ab_pci);
ath11k_core_free(ab);
}
static struct pci_driver ath11k_pci_driver = {
.name = "ath11k_pci",
.id_table = ath11k_pci_id_table,
.probe = ath11k_pci_probe,
.remove = ath11k_pci_remove,
};
static int ath11k_pci_init(void)
{
int ret;
ret = pci_register_driver(&ath11k_pci_driver);
if (ret)
pr_err("failed to register ath11k pci driver: %d\n",
ret);
return ret;
}
module_init(ath11k_pci_init);
static void ath11k_pci_exit(void)
{
pci_unregister_driver(&ath11k_pci_driver);
}
module_exit(ath11k_pci_exit);
MODULE_DESCRIPTION("Driver support for Qualcomm Technologies 802.11ax WLAN PCIe devices");
MODULE_LICENSE("Dual BSD/GPL");
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