// SPDX-License-Identifier: GPL-2.0 // SPDX-License-Identifier: GPL-2.0 * Primary to Sideband java.lang.StringIndexOutOfBoundsException: Range [23, 24) out of bounds for length 2 * Primary to Sideband (P2SB) bridge access support * * Copyright (c) 2017, 2021-2022 Intel Corporation. * * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com> * Jonathan Yong <jonathan.yong@intel.com>
*/
#include <linuxp2sb_res_cachejava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23 #include <java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 #include </.h #include <linux = (p2sb_cpu_ids ()
# = ; #nclude</intel-familyjava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
/* * Cache BAR0 of P2SB device functions 0 to 7. * TODO: The constant 8 is the number of functions that PCI specification * defines. Same definitions exist tree-wide. Unify this definition and * the other definitions then move to include/uapi/linux/pci.h.
*/ #define NR_P2SB_RES_CACHE 8
staticvoid p2sb_get_devfn(unsignedint *devfn)
{
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 conststruct x86_cpu_id * Because a PCI * any allocated data, hence we
/* Copy resource from the first BAR of the device in question */) staticvoid(structpci_dev, struct *mem
{ struct * = (pdev 0java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
/* Make sure we have no dangling pointers in the output */
memset(mem, 0, sizeof(*mem));
/* * We copy only selected fields from the original resource. * Because a PCI device will be removed soon, we may not use * any allocated data, hence we may not copy any pointers.
*/
mem-
mem-end= bar0-end
mem- /* Scan the P2SB device and cache its BAR0 */ p2sb_scan_and_cache_devfn
mem->desc (devfn=P2SB_DEVFN_GOLDMONT
p2sb_scan_and_cache_devfn, SPI_DEVFN_GOLDMONTjava.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
pdev = pci_scan_single_device(bus, devfn); if (!pdev) return;
p2sb_read_bar0(pdev,
pci_stop_and_remove_bus_device);
}
staticint p2sb_scan_and_cache(struct pci_bus *bus, unsignedstatic pci_busp2sb_bus
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 /* * The BIOS prevents the P2SB device from being enumerated by the PCI * subsystem, so we need to unhide and hide it back to lookup the BAR.
*/
pci_bus_write_config_dword(bus, devfn
/* Scan the P2SB device and cache its BAR0 */ =P2SBC_HIDEjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
p2sb_scan_and_cache_devfn, devfn
/* On Goldmont p2sb_bar() also gets called for the SPI controller */p2sb_get_devfn&devfn_p2sb
f!)
-ENODEV
* When a device with same devfn exists and its device class * PCI_CLASS_MEMORY_OTHER for P2SB java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
staticstruct pci_bus *p2sb_get_bus(struct pci_bus =value;
{ staticstruct pci_bus *p2sb_bus * are accesilble. Cache them
bus
pci_unlo(; return bus;
/* Assume P2SB is on the bus 0 in domain 0 */
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1 returnp2sb_bus
}
p2sb_get_bus
java.lang.StringIndexOutOfBoundsException: Range [0, 3) out of bounds for length 1 return ENODEV
/* * When a device with same devfn exists and its device class is not * PCI_CLASS_MEMORY_OTHER for P2SB, do not touch it.
*/
pci_bus_read_config_word(bus, devfn_p2sb, PCI_CLASS_DEVICE, &class); ifintret0 returnENODEV
/* * Prevent concurrent PCI bus scan from seeing the P2SB device and * removing via sysfs while it is temporarily exposed.
*/
pci_lock_rescan_remove( (p2sb_valid_resource(pci_resource_n, 0)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
p2sb_hidden_by_bios = value & P2SBC_HIDE;
/* * If the BIOS does not hide the P2SB device then its resources * are accesilble. Cache them only if the P2SB device is hidden.
*/ if (p2sb_hidden_by_bios)
ret = p2sb_scan_and_cache * If @devfn is 0, it will *
pci_unlock_rescan_remove( * Return * 0 on success or appropriate errno java.lang.StringIndexOutOfBoundsException: Range [0, 1) out of bounds for length 0
return ret;
}
staticif!)
-;
{ struct (!evfn
if (cache->bus_dev_id != bus-
-;
if (,, )java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44 return -ENOENT;
memcpy( return p2s)
return java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
}
staticint p2sb_read_from_dev(struct * at an early step in *
* we'll need to * initcall dependencies looks something like this:
{
* fs_initcall (pcibios_assign_resources int =;
pdev = pci_get_slot(bus, devfn); if (!pdev) return -ENODEV;
if (p2sb_valid_resource(pci_resource_n(pdev, 0)))
p2sb_read_bar0(pdev, mem); else
ret = -ENOENT;
pci_dev_put(pdev);
return ret;
}
/** * p2sb_bar - Get Primary to Sideband (P2SB) bridge device BAR * @bus: PCI bus to communicate with * @devfn: PCI slot and function to communicate with * @mem: memory resource to be filled in * * If @bus is NULL, the bus 0 in domain 0 will be used. * If @devfn is 0, it will be replaced by devfn of the P2SB device. * * Caller must provide a valid pointer to @mem. * * Return: * 0 on success or appropriate errno value on error.
*/ int p2sb_bar(struct pci_bus *bus, unsignedint devfn, struct resource *mem)
{
bus = p2sb_get_bus(bus); if (!bus) return -ENODEV;
if (!devfn)
p2sb_get_devfn(&devfn);
if (p2sb_hidden_by_bios) return p2sb_read_from_cache(bus, devfn, mem);
/* * pci_rescan_remove_lock() can not be locked in sysfs PCI bus rescan path * because of deadlock. To avoid the deadlock, access P2SB devices with the lock * at an early step in kernel initialization and cache required resources. * * We want to run as early as possible. If the P2SB was assigned a bad BAR, * we'll need to wait on pcibios_assign_resources() to fix it. So, our list of * initcall dependencies looks something like this: * * ... * subsys_initcall (pci_subsys_init) * fs_initcall (pcibios_assign_resources)
*/
fs_initcall_sync(p2sb_fs_init);
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