2005-04-16 22:20:36 +00:00
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/*
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* c 2001 PPC 64 Team, IBM Corp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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2005-09-27 16:50:25 +00:00
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#ifndef _ASM_POWERPC_PPC_PCI_H
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#define _ASM_POWERPC_PPC_PCI_H
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2005-12-16 21:43:46 +00:00
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#ifdef __KERNEL__
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2005-04-16 22:20:36 +00:00
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2007-03-04 06:04:44 +00:00
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#ifdef CONFIG_PCI
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2005-04-16 22:20:36 +00:00
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#include <linux/pci.h>
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#include <asm/pci-bridge.h>
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extern unsigned long isa_io_base;
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extern void pci_setup_phb_io(struct pci_controller *hose, int primary);
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extern void pci_setup_phb_io_dynamic(struct pci_controller *hose, int primary);
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extern struct list_head hose_list;
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2007-03-04 06:07:38 +00:00
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extern void find_and_init_phbs(void);
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2005-04-16 22:20:36 +00:00
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[POWERPC] Rewrite IO allocation & mapping on powerpc64
This rewrites pretty much from scratch the handling of MMIO and PIO
space allocations on powerpc64. The main goals are:
- Get rid of imalloc and use more common code where possible
- Simplify the current mess so that PIO space is allocated and
mapped in a single place for PCI bridges
- Handle allocation constraints of PIO for all bridges including
hot plugged ones within the 2GB space reserved for IO ports,
so that devices on hotplugged busses will now work with drivers
that assume IO ports fit in an int.
- Cleanup and separate tracking of the ISA space in the reserved
low 64K of IO space. No ISA -> Nothing mapped there.
I booted a cell blade with IDE on PIO and MMIO and a dual G5 so
far, that's it :-)
With this patch, all allocations are done using the code in
mm/vmalloc.c, though we use the low level __get_vm_area with
explicit start/stop constraints in order to manage separate
areas for vmalloc/vmap, ioremap, and PCI IOs.
This greatly simplifies a lot of things, as you can see in the
diffstat of that patch :-)
A new pair of functions pcibios_map/unmap_io_space() now replace
all of the previous code that used to manipulate PCI IOs space.
The allocation is done at mapping time, which is now called from
scan_phb's, just before the devices are probed (instead of after,
which is by itself a bug fix). The only other caller is the PCI
hotplug code for hot adding PCI-PCI bridges (slots).
imalloc is gone, as is the "sub-allocation" thing, but I do beleive
that hotplug should still work in the sense that the space allocation
is always done by the PHB, but if you unmap a child bus of this PHB
(which seems to be possible), then the code should properly tear
down all the HPTE mappings for that area of the PHB allocated IO space.
I now always reserve the first 64K of IO space for the bridge with
the ISA bus on it. I have moved the code for tracking ISA in a separate
file which should also make it smarter if we ever are capable of
hot unplugging or re-plugging an ISA bridge.
This should have a side effect on platforms like powermac where VGA IOs
will no longer work. This is done on purpose though as they would have
worked semi-randomly before. The idea at this point is to isolate drivers
that might need to access those and fix them by providing a proper
function to obtain an offset to the legacy IOs of a given bus.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-06-04 05:15:36 +00:00
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extern struct pci_dev *isa_bridge_pcidev; /* may be NULL if no ISA bus */
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2005-04-16 22:20:36 +00:00
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2005-11-04 00:42:26 +00:00
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/** Bus Unit ID macros; get low and hi 32-bits of the 64-bit BUID */
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2010-09-15 08:13:19 +00:00
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#define BUID_HI(buid) upper_32_bits(buid)
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#define BUID_LO(buid) lower_32_bits(buid)
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2005-11-04 00:42:26 +00:00
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2005-04-16 22:20:36 +00:00
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/* PCI device_node operations */
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struct device_node;
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typedef void *(*traverse_func)(struct device_node *me, void *data);
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void *traverse_pci_devices(struct device_node *start, traverse_func pre,
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void *data);
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2006-11-11 06:25:08 +00:00
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extern void pci_devs_phb_init(void);
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extern void pci_devs_phb_init_dynamic(struct pci_controller *phb);
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2005-04-16 22:20:36 +00:00
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2005-06-23 07:09:54 +00:00
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/* From rtas_pci.h */
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2006-11-11 06:25:08 +00:00
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extern void init_pci_config_tokens (void);
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extern unsigned long get_phb_buid (struct device_node *);
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extern int rtas_setup_phb(struct pci_controller *phb);
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2005-04-16 22:20:36 +00:00
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2005-11-04 00:50:10 +00:00
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#ifdef CONFIG_EEH
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2005-11-04 00:53:07 +00:00
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2012-09-07 22:44:23 +00:00
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void eeh_addr_cache_insert_dev(struct pci_dev *dev);
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void eeh_addr_cache_rmv_dev(struct pci_dev *dev);
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struct eeh_dev *eeh_addr_cache_get_dev(unsigned long addr);
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2012-09-07 22:44:16 +00:00
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void eeh_slot_error_detail(struct eeh_pe *pe, int severity);
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int eeh_pci_enable(struct eeh_pe *pe, int function);
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2012-09-07 22:44:17 +00:00
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int eeh_reset_pe(struct eeh_pe *);
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2012-09-07 22:44:21 +00:00
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void eeh_save_bars(struct eeh_dev *edev);
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2005-11-04 00:50:17 +00:00
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int rtas_write_config(struct pci_dn *, int where, int size, u32 val);
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2005-11-04 00:55:19 +00:00
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int rtas_read_config(struct pci_dn *, int where, int size, u32 *val);
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2012-09-07 22:44:12 +00:00
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void eeh_pe_state_mark(struct eeh_pe *pe, int state);
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void eeh_pe_state_clear(struct eeh_pe *pe, int state);
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powerpc/eeh: No hotplug on permanently removed dev
The issue was detected in a bit complicated test case where
we have multiple hierarchical PEs shown as following figure:
+-----------------+
| PE#3 p2p#0 |
| p2p#1 |
+-----------------+
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+-----------------+
| PE#4 pdev#0 |
| pdev#1 |
+-----------------+
PE#4 (have 2 PCI devices) is the child of PE#3, which has 2 p2p
bridges. We accidentally had less-known scenario: PE#4 was removed
permanently from the system because of permanent failure (e.g.
exceeding the max allowd failure times in last hour), then we detects
EEH errors on PE#3 and tried to recover it. However, eeh_dev instances
for pdev#0/1 were not detached from PE#4, which was still connected to
PE#3. All of that was because of the fact that we rely on count-based
pcibios_release_device(), which isn't reliable enough. When doing
recovery for PE#3, we still apply hotplug on PE#4 and pdev#0/1, which
are not valid any more. Eventually, we run into kernel crash.
The patch fixes above issue from two aspects. For unplug, we simply
skip those permanently removed PE, whose state is (EEH_PE_STATE_ISOLATED
&& !EEH_PE_STATE_RECOVERING) and its frozen count should be greater
than EEH_MAX_ALLOWED_FREEZES. For plug, we marked all permanently
removed EEH devices with EEH_DEV_REMOVED and return 0xFF's on read
its PCI config so that PCI core will omit them.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-04-24 08:00:19 +00:00
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void eeh_pe_dev_mode_mark(struct eeh_pe *pe, int mode);
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2005-11-04 00:54:29 +00:00
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2007-05-23 17:16:46 +00:00
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void eeh_sysfs_add_device(struct pci_dev *pdev);
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void eeh_sysfs_remove_device(struct pci_dev *pdev);
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2010-02-03 05:56:41 +00:00
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static inline const char *eeh_pci_name(struct pci_dev *pdev)
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{
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return pdev ? pci_name(pdev) : "<null>";
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}
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2012-01-11 09:09:58 +00:00
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static inline const char *eeh_driver_name(struct pci_dev *pdev)
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{
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return (pdev && pdev->driver) ? pdev->driver->name : "<null>";
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}
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2007-05-09 16:38:11 +00:00
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#endif /* CONFIG_EEH */
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2005-11-04 00:50:10 +00:00
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2007-03-04 06:04:44 +00:00
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#else /* CONFIG_PCI */
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static inline void find_and_init_phbs(void) { }
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static inline void init_pci_config_tokens(void) { }
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#endif /* !CONFIG_PCI */
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2005-12-16 21:43:46 +00:00
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#endif /* __KERNEL__ */
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2005-09-27 16:50:25 +00:00
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#endif /* _ASM_POWERPC_PPC_PCI_H */
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