From cde9070d9970eef1f7ec2360586c802a16230ad8 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:50 +0000
Subject: [PATCH] rtl88x2CE_WiFi_linux driver
---
kernel/arch/powerpc/platforms/powernv/pci.c | 244 ++++++++----------------------------------------
1 files changed, 43 insertions(+), 201 deletions(-)
diff --git a/kernel/arch/powerpc/platforms/powernv/pci.c b/kernel/arch/powerpc/platforms/powernv/pci.c
index b6fa900..9b9bca1 100644
--- a/kernel/arch/powerpc/platforms/powernv/pci.c
+++ b/kernel/arch/powerpc/platforms/powernv/pci.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Support PCI/PCIe on PowerNV platforms
*
* Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
@@ -38,12 +34,11 @@
#include "powernv.h"
#include "pci.h"
-static DEFINE_MUTEX(p2p_mutex);
static DEFINE_MUTEX(tunnel_mutex);
int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id)
{
- struct device_node *parent = np;
+ struct device_node *node = np;
u32 bdfn;
u64 phbid;
int ret;
@@ -53,24 +48,29 @@
return -ENXIO;
bdfn = ((bdfn & 0x00ffff00) >> 8);
- while ((parent = of_get_parent(parent))) {
- if (!PCI_DN(parent)) {
- of_node_put(parent);
+ for (node = np; node; node = of_get_parent(node)) {
+ if (!PCI_DN(node)) {
+ of_node_put(node);
break;
}
- if (!of_device_is_compatible(parent, "ibm,ioda2-phb")) {
- of_node_put(parent);
+ if (!of_device_is_compatible(node, "ibm,ioda2-phb") &&
+ !of_device_is_compatible(node, "ibm,ioda3-phb") &&
+ !of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb")) {
+ of_node_put(node);
continue;
}
- ret = of_property_read_u64(parent, "ibm,opal-phbid", &phbid);
+ ret = of_property_read_u64(node, "ibm,opal-phbid", &phbid);
if (ret) {
- of_node_put(parent);
+ of_node_put(node);
return -ENXIO;
}
- *id = PCI_SLOT_ID(phbid, bdfn);
+ if (of_device_is_compatible(node, "ibm,ioda2-npu2-opencapi-phb"))
+ *id = PCI_PHB_SLOT_ID(phbid);
+ else
+ *id = PCI_SLOT_ID(phbid, bdfn);
return 0;
}
@@ -160,11 +160,9 @@
}
EXPORT_SYMBOL_GPL(pnv_pci_set_power_state);
-#ifdef CONFIG_PCI_MSI
int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
{
- struct pci_controller *hose = pci_bus_to_host(pdev->bus);
- struct pnv_phb *phb = hose->private_data;
+ struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
struct msi_desc *entry;
struct msi_msg msg;
int hwirq;
@@ -212,8 +210,7 @@
void pnv_teardown_msi_irqs(struct pci_dev *pdev)
{
- struct pci_controller *hose = pci_bus_to_host(pdev->bus);
- struct pnv_phb *phb = hose->private_data;
+ struct pnv_phb *phb = pci_bus_to_pnvhb(pdev->bus);
struct msi_desc *entry;
irq_hw_number_t hwirq;
@@ -229,7 +226,6 @@
msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, 1);
}
}
-#endif /* CONFIG_PCI_MSI */
/* Nicely print the contents of the PE State Tables (PEST). */
static void pnv_pci_dump_pest(__be64 pestA[], __be64 pestB[], int pest_size)
@@ -816,108 +812,6 @@
return tbl;
}
-void pnv_pci_dma_dev_setup(struct pci_dev *pdev)
-{
- struct pci_controller *hose = pci_bus_to_host(pdev->bus);
- struct pnv_phb *phb = hose->private_data;
-
- if (phb && phb->dma_dev_setup)
- phb->dma_dev_setup(phb, pdev);
-}
-
-void pnv_pci_dma_bus_setup(struct pci_bus *bus)
-{
- struct pci_controller *hose = bus->sysdata;
- struct pnv_phb *phb = hose->private_data;
- struct pnv_ioda_pe *pe;
-
- list_for_each_entry(pe, &phb->ioda.pe_list, list) {
- if (!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL)))
- continue;
-
- if (!pe->pbus)
- continue;
-
- if (bus->number == ((pe->rid >> 8) & 0xFF)) {
- pe->pbus = bus;
- break;
- }
- }
-}
-
-int pnv_pci_set_p2p(struct pci_dev *initiator, struct pci_dev *target, u64 desc)
-{
- struct pci_controller *hose;
- struct pnv_phb *phb_init, *phb_target;
- struct pnv_ioda_pe *pe_init;
- int rc;
-
- if (!opal_check_token(OPAL_PCI_SET_P2P))
- return -ENXIO;
-
- hose = pci_bus_to_host(initiator->bus);
- phb_init = hose->private_data;
-
- hose = pci_bus_to_host(target->bus);
- phb_target = hose->private_data;
-
- pe_init = pnv_ioda_get_pe(initiator);
- if (!pe_init)
- return -ENODEV;
-
- /*
- * Configuring the initiator's PHB requires to adjust its
- * TVE#1 setting. Since the same device can be an initiator
- * several times for different target devices, we need to keep
- * a reference count to know when we can restore the default
- * bypass setting on its TVE#1 when disabling. Opal is not
- * tracking PE states, so we add a reference count on the PE
- * in linux.
- *
- * For the target, the configuration is per PHB, so we keep a
- * target reference count on the PHB.
- */
- mutex_lock(&p2p_mutex);
-
- if (desc & OPAL_PCI_P2P_ENABLE) {
- /* always go to opal to validate the configuration */
- rc = opal_pci_set_p2p(phb_init->opal_id, phb_target->opal_id,
- desc, pe_init->pe_number);
-
- if (rc != OPAL_SUCCESS) {
- rc = -EIO;
- goto out;
- }
-
- pe_init->p2p_initiator_count++;
- phb_target->p2p_target_count++;
- } else {
- if (!pe_init->p2p_initiator_count ||
- !phb_target->p2p_target_count) {
- rc = -EINVAL;
- goto out;
- }
-
- if (--pe_init->p2p_initiator_count == 0)
- pnv_pci_ioda2_set_bypass(pe_init, true);
-
- if (--phb_target->p2p_target_count == 0) {
- rc = opal_pci_set_p2p(phb_init->opal_id,
- phb_target->opal_id, desc,
- pe_init->pe_number);
- if (rc != OPAL_SUCCESS) {
- rc = -EIO;
- goto out;
- }
- }
- }
- rc = 0;
-out:
- mutex_unlock(&p2p_mutex);
- return rc;
-}
-EXPORT_SYMBOL_GPL(pnv_pci_set_p2p);
-
struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev)
{
struct pci_controller *hose = pci_bus_to_host(dev->bus);
@@ -926,69 +820,17 @@
}
EXPORT_SYMBOL(pnv_pci_get_phb_node);
-int pnv_pci_enable_tunnel(struct pci_dev *dev, u64 *asnind)
-{
- struct device_node *np;
- const __be32 *prop;
- struct pnv_ioda_pe *pe;
- uint16_t window_id;
- int rc;
-
- if (!radix_enabled())
- return -ENXIO;
-
- if (!(np = pnv_pci_get_phb_node(dev)))
- return -ENXIO;
-
- prop = of_get_property(np, "ibm,phb-indications", NULL);
- of_node_put(np);
-
- if (!prop || !prop[1])
- return -ENXIO;
-
- *asnind = (u64)be32_to_cpu(prop[1]);
- pe = pnv_ioda_get_pe(dev);
- if (!pe)
- return -ENODEV;
-
- /* Increase real window size to accept as_notify messages. */
- window_id = (pe->pe_number << 1 ) + 1;
- rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, pe->pe_number,
- window_id, pe->tce_bypass_base,
- (uint64_t)1 << 48);
- return opal_error_code(rc);
-}
-EXPORT_SYMBOL_GPL(pnv_pci_enable_tunnel);
-
-int pnv_pci_disable_tunnel(struct pci_dev *dev)
-{
- struct pnv_ioda_pe *pe;
-
- pe = pnv_ioda_get_pe(dev);
- if (!pe)
- return -ENODEV;
-
- /* Restore default real window size. */
- pnv_pci_ioda2_set_bypass(pe, true);
- return 0;
-}
-EXPORT_SYMBOL_GPL(pnv_pci_disable_tunnel);
-
int pnv_pci_set_tunnel_bar(struct pci_dev *dev, u64 addr, int enable)
{
- __be64 val;
- struct pci_controller *hose;
- struct pnv_phb *phb;
+ struct pnv_phb *phb = pci_bus_to_pnvhb(dev->bus);
u64 tunnel_bar;
+ __be64 val;
int rc;
if (!opal_check_token(OPAL_PCI_GET_PBCQ_TUNNEL_BAR))
return -ENXIO;
if (!opal_check_token(OPAL_PCI_SET_PBCQ_TUNNEL_BAR))
return -ENXIO;
-
- hose = pci_bus_to_host(dev->bus);
- phb = hose->private_data;
mutex_lock(&tunnel_mutex);
rc = opal_pci_get_pbcq_tunnel_bar(phb->opal_id, &val);
@@ -1027,29 +869,6 @@
return rc;
}
EXPORT_SYMBOL_GPL(pnv_pci_set_tunnel_bar);
-
-#ifdef CONFIG_PPC64 /* for thread.tidr */
-int pnv_pci_get_as_notify_info(struct task_struct *task, u32 *lpid, u32 *pid,
- u32 *tid)
-{
- struct mm_struct *mm = NULL;
-
- if (task == NULL)
- return -EINVAL;
-
- mm = get_task_mm(task);
- if (mm == NULL)
- return -EINVAL;
-
- *pid = mm->context.id;
- mmput(mm);
-
- *tid = task->thread.tidr;
- *lpid = mfspr(SPRN_LPID);
- return 0;
-}
-EXPORT_SYMBOL_GPL(pnv_pci_get_as_notify_info);
-#endif
void pnv_pci_shutdown(void)
{
@@ -1126,4 +945,27 @@
set_pci_dma_ops(&dma_iommu_ops);
}
-machine_subsys_initcall_sync(powernv, tce_iommu_bus_notifier_init);
+static int pnv_tce_iommu_bus_notifier(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_DEL_DEVICE:
+ iommu_del_device(dev);
+ return 0;
+ default:
+ return 0;
+ }
+}
+
+static struct notifier_block pnv_tce_iommu_bus_nb = {
+ .notifier_call = pnv_tce_iommu_bus_notifier,
+};
+
+static int __init pnv_tce_iommu_bus_notifier_init(void)
+{
+ bus_register_notifier(&pci_bus_type, &pnv_tce_iommu_bus_nb);
+ return 0;
+}
+machine_subsys_initcall_sync(powernv, pnv_tce_iommu_bus_notifier_init);
--
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