[IA64] hotplug/ia64: SN Hotplug Driver - SN Hotplug Driver code
This patch is the SGI hotplug driver and additional changes required for the driver. These modifications include changes to the SN io_init.c code for memory management, the inclusion of new SAL calls to enable and disable PCI slots, and a hotplug-style driver. Signed-off-by: Prarit Bhargava <prarit@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>wifi-calibration
Prarit Bhargava
Tony Luck
parent
283c7f6ac6
commit
6f354b014b
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@ -23,6 +23,14 @@
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nasid_t master_nasid = INVALID_NASID; /* Partition Master */
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static struct list_head sn_sysdata_list;
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/* sysdata list struct */
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struct sysdata_el {
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struct list_head entry;
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void *sysdata;
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};
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struct slab_info {
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struct hubdev_info hubdev;
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};
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@ -136,23 +144,6 @@ sal_get_pcidev_info(u64 segment, u64 bus_number, u64 devfn, u64 pci_dev,
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return ret_stuff.v0;
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}
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/*
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* sn_alloc_pci_sysdata() - This routine allocates a pci controller
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* which is expected as the pci_dev and pci_bus sysdata by the Linux
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* PCI infrastructure.
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*/
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static inline struct pci_controller *sn_alloc_pci_sysdata(void)
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{
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struct pci_controller *pci_sysdata;
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pci_sysdata = kmalloc(sizeof(*pci_sysdata), GFP_KERNEL);
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if (!pci_sysdata)
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BUG();
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memset(pci_sysdata, 0, sizeof(*pci_sysdata));
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return pci_sysdata;
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}
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/*
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* sn_fixup_ionodes() - This routine initializes the HUB data strcuture for
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* each node in the system.
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@ -220,6 +211,15 @@ static void sn_fixup_ionodes(void)
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}
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void sn_pci_unfixup_slot(struct pci_dev *dev)
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{
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struct pci_dev *host_pci_dev = SN_PCIDEV_INFO(dev)->host_pci_dev;
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sn_irq_unfixup(dev);
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pci_dev_put(host_pci_dev);
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pci_dev_put(dev);
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}
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/*
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* sn_pci_fixup_slot() - This routine sets up a slot's resources
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* consistent with the Linux PCI abstraction layer. Resources acquired
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@ -238,6 +238,7 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
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unsigned long size;
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unsigned int bus_no, devfn;
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pci_dev_get(dev); /* for the sysdata pointer */
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dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
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if (SN_PCIDEV_INFO(dev) <= 0)
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BUG(); /* Cannot afford to run out of memory */
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@ -276,7 +277,8 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
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dev->resource[idx].parent = &iomem_resource;
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}
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/* Using the PROMs values for the PCI host bus, get the Linux
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/*
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* Using the PROMs values for the PCI host bus, get the Linux
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* PCI host_pci_dev struct and set up host bus linkages
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*/
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@ -313,55 +315,57 @@ void sn_pci_fixup_slot(struct pci_dev *dev)
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* sn_pci_controller_fixup() - This routine sets up a bus's resources
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* consistent with the Linux PCI abstraction layer.
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*/
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static void sn_pci_controller_fixup(int segment, int busnum)
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void sn_pci_controller_fixup(int segment, int busnum, struct pci_bus *bus)
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{
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int status = 0;
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int nasid, cnode;
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struct pci_bus *bus;
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struct pci_controller *controller;
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struct pcibus_bussoft *prom_bussoft_ptr;
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struct hubdev_info *hubdev_info;
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void *provider_soft;
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struct sn_pcibus_provider *provider;
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status =
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sal_get_pcibus_info((u64) segment, (u64) busnum,
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(u64) ia64_tpa(&prom_bussoft_ptr));
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if (status > 0) {
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return; /* bus # does not exist */
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}
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status = sal_get_pcibus_info((u64) segment, (u64) busnum,
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(u64) ia64_tpa(&prom_bussoft_ptr));
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if (status > 0)
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return; /*bus # does not exist */
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prom_bussoft_ptr = __va(prom_bussoft_ptr);
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controller = sn_alloc_pci_sysdata();
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/* controller non-zero is BUG'd in sn_alloc_pci_sysdata */
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bus = pci_scan_bus(busnum, &pci_root_ops, controller);
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controller = kcalloc(1,sizeof(struct pci_controller), GFP_KERNEL);
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if (!controller)
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BUG();
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if (bus == NULL) {
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return; /* error, or bus already scanned */
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bus = pci_scan_bus(busnum, &pci_root_ops, controller);
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if (bus == NULL)
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return; /* error, or bus already scanned */
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bus->sysdata = NULL;
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}
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if (bus->sysdata)
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goto error_return; /* sysdata already alloc'd */
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/*
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* Per-provider fixup. Copies the contents from prom to local
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* area and links SN_PCIBUS_BUSSOFT().
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*/
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if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES) {
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if (prom_bussoft_ptr->bs_asic_type >= PCIIO_ASIC_MAX_TYPES)
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return; /* unsupported asic type */
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}
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if (prom_bussoft_ptr->bs_asic_type == PCIIO_ASIC_TYPE_PPB)
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goto error_return; /* no further fixup necessary */
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provider = sn_pci_provider[prom_bussoft_ptr->bs_asic_type];
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if (provider == NULL) {
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if (provider == NULL)
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return; /* no provider registerd for this asic */
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}
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provider_soft = NULL;
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if (provider->bus_fixup) {
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if (provider->bus_fixup)
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provider_soft = (*provider->bus_fixup) (prom_bussoft_ptr);
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}
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if (provider_soft == NULL) {
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if (provider_soft == NULL)
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return; /* fixup failed or not applicable */
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}
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/*
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* Generic bus fixup goes here. Don't reference prom_bussoft_ptr
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@ -370,12 +374,47 @@ static void sn_pci_controller_fixup(int segment, int busnum)
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bus->sysdata = controller;
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PCI_CONTROLLER(bus)->platform_data = provider_soft;
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nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
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cnode = nasid_to_cnodeid(nasid);
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hubdev_info = (struct hubdev_info *)(NODEPDA(cnode)->pdinfo);
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SN_PCIBUS_BUSSOFT(bus)->bs_xwidget_info =
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&(hubdev_info->hdi_xwidget_info[SN_PCIBUS_BUSSOFT(bus)->bs_xid]);
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return;
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error_return:
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kfree(controller);
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return;
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}
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void sn_bus_store_sysdata(struct pci_dev *dev)
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{
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struct sysdata_el *element;
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element = kcalloc(1, sizeof(struct sysdata_el), GFP_KERNEL);
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if (!element) {
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dev_dbg(dev, "%s: out of memory!\n", __FUNCTION__);
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return;
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}
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element->sysdata = dev->sysdata;
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list_add(&element->entry, &sn_sysdata_list);
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}
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void sn_bus_free_sysdata(void)
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{
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struct sysdata_el *element;
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struct list_head *list;
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sn_sysdata_free_start:
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list_for_each(list, &sn_sysdata_list) {
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element = list_entry(list, struct sysdata_el, entry);
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list_del(&element->entry);
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kfree(element->sysdata);
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kfree(element);
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goto sn_sysdata_free_start;
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}
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return;
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}
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/*
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@ -413,15 +452,16 @@ static int __init sn_pci_init(void)
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ia64_max_iommu_merge_mask = ~PAGE_MASK;
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sn_fixup_ionodes();
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sn_irq_lh_init();
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INIT_LIST_HEAD(&sn_sysdata_list);
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sn_init_cpei_timer();
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#ifdef CONFIG_PROC_FS
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register_sn_procfs();
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#endif
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for (i = 0; i < PCI_BUSES_TO_SCAN; i++) {
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sn_pci_controller_fixup(0, i);
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}
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/* busses are not known yet ... */
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for (i = 0; i < PCI_BUSES_TO_SCAN; i++)
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sn_pci_controller_fixup(0, i, NULL);
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/*
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* Generic Linux PCI Layer has created the pci_bus and pci_dev
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@ -430,9 +470,8 @@ static int __init sn_pci_init(void)
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*/
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while ((pci_dev =
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pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL) {
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pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_dev)) != NULL)
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sn_pci_fixup_slot(pci_dev);
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}
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sn_ioif_inited = 1; /* sn I/O infrastructure now initialized */
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@ -474,3 +513,8 @@ cnodeid_get_geoid(cnodeid_t cnode)
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}
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subsys_initcall(sn_pci_init);
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EXPORT_SYMBOL(sn_pci_fixup_slot);
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EXPORT_SYMBOL(sn_pci_unfixup_slot);
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EXPORT_SYMBOL(sn_pci_controller_fixup);
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EXPORT_SYMBOL(sn_bus_store_sysdata);
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EXPORT_SYMBOL(sn_bus_free_sysdata);
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@ -284,7 +284,6 @@ void sn_irq_fixup(struct pci_dev *pci_dev, struct sn_irq_info *sn_irq_info)
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int cpu = nasid_slice_to_cpuid(nasid, slice);
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pci_dev_get(pci_dev);
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sn_irq_info->irq_cpuid = cpu;
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sn_irq_info->irq_pciioinfo = SN_PCIDEV_INFO(pci_dev);
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@ -305,15 +304,16 @@ void sn_irq_unfixup(struct pci_dev *pci_dev)
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return;
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sn_irq_info = SN_PCIDEV_INFO(pci_dev)->pdi_sn_irq_info;
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if (!sn_irq_info || !sn_irq_info->irq_irq)
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if (!sn_irq_info || !sn_irq_info->irq_irq) {
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kfree(sn_irq_info);
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return;
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}
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unregister_intr_pda(sn_irq_info);
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spin_lock(&sn_irq_info_lock);
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list_del_rcu(&sn_irq_info->list);
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spin_unlock(&sn_irq_info_lock);
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call_rcu(&sn_irq_info->rcu, sn_irq_info_free);
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pci_dev_put(pci_dev);
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}
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@ -18,6 +18,40 @@
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#include "xtalk/xwidgetdev.h"
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#include "xtalk/hubdev.h"
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int
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sal_pcibr_slot_enable(struct pcibus_info *soft, int device, void *resp)
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{
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struct ia64_sal_retval ret_stuff;
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uint64_t busnum;
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ret_stuff.status = 0;
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ret_stuff.v0 = 0;
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busnum = soft->pbi_buscommon.bs_persist_busnum;
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SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_ENABLE, (u64) busnum,
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(u64) device, (u64) resp, 0, 0, 0, 0);
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return (int)ret_stuff.v0;
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}
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int
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sal_pcibr_slot_disable(struct pcibus_info *soft, int device, int action,
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void *resp)
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{
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struct ia64_sal_retval ret_stuff;
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uint64_t busnum;
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ret_stuff.status = 0;
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ret_stuff.v0 = 0;
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busnum = soft->pbi_buscommon.bs_persist_busnum;
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SAL_CALL_NOLOCK(ret_stuff, (u64) SN_SAL_IOIF_SLOT_DISABLE,
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(u64) busnum, (u64) device, (u64) action,
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(u64) resp, 0, 0, 0);
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return (int)ret_stuff.v0;
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}
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static int sal_pcibr_error_interrupt(struct pcibus_info *soft)
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{
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struct ia64_sal_retval ret_stuff;
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@ -187,3 +221,6 @@ pcibr_init_provider(void)
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return 0;
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}
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EXPORT_SYMBOL_GPL(sal_pcibr_slot_enable);
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EXPORT_SYMBOL_GPL(sal_pcibr_slot_disable);
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@ -187,9 +187,10 @@ config HOTPLUG_PCI_RPA_DLPAR
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config HOTPLUG_PCI_SGI
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tristate "SGI PCI Hotplug Support"
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depends on HOTPLUG_PCI && IA64_SGI_SN2
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depends on HOTPLUG_PCI && (IA64_SGI_SN2 || IA64_GENERIC)
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help
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Say Y here if you have an SGI IA64 Altix system.
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Say Y here if you want to use the SGI Altix Hotplug
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Driver for PCI devices.
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When in doubt, say N.
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@ -14,6 +14,7 @@ obj-$(CONFIG_HOTPLUG_PCI_PCIE) += pciehp.o
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obj-$(CONFIG_HOTPLUG_PCI_SHPC) += shpchp.o
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obj-$(CONFIG_HOTPLUG_PCI_RPA) += rpaphp.o
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obj-$(CONFIG_HOTPLUG_PCI_RPA_DLPAR) += rpadlpar_io.o
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obj-$(CONFIG_HOTPLUG_PCI_SGI) += sgi_hotplug.o
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pci_hotplug-objs := pci_hotplug_core.o
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@ -0,0 +1,611 @@
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2005 Silicon Graphics, Inc. All rights reserved.
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*
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* This work was based on the 2.4/2.6 kernel development by Dick Reigner.
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* Work to add BIOS PROM support was completed by Mike Habeck.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/proc_fs.h>
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#include <linux/types.h>
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#include <asm/sn/addrs.h>
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#include <asm/sn/l1.h>
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#include <asm/sn/module.h>
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#include <asm/sn/pcibr_provider.h>
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#include <asm/sn/pcibus_provider_defs.h>
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#include <asm/sn/pcidev.h>
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#include <asm/sn/sn_sal.h>
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#include <asm/sn/types.h>
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#include "../pci.h"
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#include "pci_hotplug.h"
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("SGI (prarit@sgi.com, dickie@sgi.com, habeck@sgi.com)");
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MODULE_DESCRIPTION("SGI Altix Hot Plug PCI Controller Driver");
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#define PCIIO_ASIC_TYPE_TIOCA 4
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#define PCI_SLOT_ALREADY_UP 2 /* slot already up */
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#define PCI_SLOT_ALREADY_DOWN 3 /* slot already down */
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#define PCI_L1_ERR 7 /* L1 console command error */
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#define PCI_EMPTY_33MHZ 15 /* empty 33 MHz bus */
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#define PCI_L1_QSIZE 128 /* our L1 message buffer size */
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#define SN_MAX_HP_SLOTS 32 /* max number of hotplug slots */
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#define SGI_HOTPLUG_PROM_REV 0x0420 /* Min. required PROM version */
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/* internal list head */
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static struct list_head sn_hp_list;
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/* hotplug_slot struct's private pointer */
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struct slot {
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int device_num;
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struct pci_bus *pci_bus;
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/* this struct for glue internal only */
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struct hotplug_slot *hotplug_slot;
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struct list_head hp_list;
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};
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struct pcibr_slot_enable_resp {
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int resp_sub_errno;
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char resp_l1_msg[PCI_L1_QSIZE + 1];
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};
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struct pcibr_slot_disable_resp {
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int resp_sub_errno;
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char resp_l1_msg[PCI_L1_QSIZE + 1];
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};
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enum sn_pci_req_e {
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PCI_REQ_SLOT_ELIGIBLE,
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PCI_REQ_SLOT_DISABLE
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};
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static int enable_slot(struct hotplug_slot *slot);
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static int disable_slot(struct hotplug_slot *slot);
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static int get_power_status(struct hotplug_slot *slot, u8 *value);
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static struct hotplug_slot_ops sn_hotplug_slot_ops = {
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.owner = THIS_MODULE,
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.enable_slot = enable_slot,
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.disable_slot = disable_slot,
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.get_power_status = get_power_status,
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};
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static DECLARE_MUTEX(sn_hotplug_sem);
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static int sn_pci_slot_valid(struct pci_bus *pci_bus, int device)
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{
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struct pcibus_info *pcibus_info;
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int bricktype;
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int bus_num;
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pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
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/* Check to see if this is a valid slot on 'pci_bus' */
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if (!(pcibus_info->pbi_valid_devices & (1 << device)))
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return -EPERM;
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bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid);
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bus_num = pcibus_info->pbi_buscommon.bs_persist_busnum & 0xf;
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/* Do not allow hotplug operations on base I/O cards */
|
||||
if ((bricktype == L1_BRICKTYPE_IX || bricktype == L1_BRICKTYPE_IA) &&
|
||||
(bus_num == 1 && device != 1))
|
||||
return -EPERM;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int sn_pci_bus_valid(struct pci_bus *pci_bus)
|
||||
{
|
||||
struct pcibus_info *pcibus_info;
|
||||
int asic_type;
|
||||
int bricktype;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
|
||||
|
||||
/* Don't register slots hanging off the TIOCA bus */
|
||||
asic_type = pcibus_info->pbi_buscommon.bs_asic_type;
|
||||
if (asic_type == PCIIO_ASIC_TYPE_TIOCA)
|
||||
return -EPERM;
|
||||
|
||||
/* Only register slots in I/O Bricks that support hotplug */
|
||||
bricktype = MODULE_GET_BTYPE(pcibus_info->pbi_moduleid);
|
||||
switch (bricktype) {
|
||||
case L1_BRICKTYPE_IX:
|
||||
case L1_BRICKTYPE_PX:
|
||||
case L1_BRICKTYPE_IA:
|
||||
case L1_BRICKTYPE_PA:
|
||||
return 1;
|
||||
break;
|
||||
default:
|
||||
return -EPERM;
|
||||
break;
|
||||
}
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,
|
||||
struct pci_bus *pci_bus, int device)
|
||||
{
|
||||
struct pcibus_info *pcibus_info;
|
||||
struct slot *slot;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(pci_bus);
|
||||
|
||||
bss_hotplug_slot->private = kcalloc(1, sizeof(struct slot),
|
||||
GFP_KERNEL);
|
||||
if (!bss_hotplug_slot->private)
|
||||
return -ENOMEM;
|
||||
slot = (struct slot *)bss_hotplug_slot->private;
|
||||
|
||||
bss_hotplug_slot->name = kmalloc(33, GFP_KERNEL);
|
||||
if (!bss_hotplug_slot->name) {
|
||||
kfree(bss_hotplug_slot->private);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
slot->device_num = device;
|
||||
slot->pci_bus = pci_bus;
|
||||
|
||||
sprintf(bss_hotplug_slot->name, "module_%c%c%c%c%.2d_b_%d_s_%d",
|
||||
'0'+RACK_GET_CLASS(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
|
||||
'0'+RACK_GET_GROUP(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
|
||||
'0'+RACK_GET_NUM(MODULE_GET_RACK(pcibus_info->pbi_moduleid)),
|
||||
MODULE_GET_BTCHAR(pcibus_info->pbi_moduleid),
|
||||
MODULE_GET_BPOS(pcibus_info->pbi_moduleid),
|
||||
((int)pcibus_info->pbi_buscommon.bs_persist_busnum) & 0xf,
|
||||
device + 1);
|
||||
|
||||
slot->hotplug_slot = bss_hotplug_slot;
|
||||
list_add(&slot->hp_list, &sn_hp_list);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct hotplug_slot * sn_hp_destroy(void)
|
||||
{
|
||||
struct slot *slot;
|
||||
struct list_head *list;
|
||||
struct hotplug_slot *bss_hotplug_slot = NULL;
|
||||
|
||||
list_for_each(list, &sn_hp_list) {
|
||||
slot = list_entry(list, struct slot, hp_list);
|
||||
bss_hotplug_slot = slot->hotplug_slot;
|
||||
list_del(&((struct slot *)bss_hotplug_slot->private)->
|
||||
hp_list);
|
||||
break;
|
||||
}
|
||||
return bss_hotplug_slot;
|
||||
}
|
||||
|
||||
static void sn_bus_alloc_data(struct pci_dev *dev)
|
||||
{
|
||||
struct list_head *node;
|
||||
struct pci_bus *subordinate_bus;
|
||||
struct pci_dev *child;
|
||||
|
||||
sn_pci_fixup_slot(dev);
|
||||
|
||||
/* Recursively sets up the sn_irq_info structs */
|
||||
if (dev->subordinate) {
|
||||
subordinate_bus = dev->subordinate;
|
||||
list_for_each(node, &subordinate_bus->devices) {
|
||||
child = list_entry(node, struct pci_dev, bus_list);
|
||||
sn_bus_alloc_data(child);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void sn_bus_free_data(struct pci_dev *dev)
|
||||
{
|
||||
struct list_head *node;
|
||||
struct pci_bus *subordinate_bus;
|
||||
struct pci_dev *child;
|
||||
|
||||
/* Recursively clean up sn_irq_info structs */
|
||||
if (dev->subordinate) {
|
||||
subordinate_bus = dev->subordinate;
|
||||
list_for_each(node, &subordinate_bus->devices) {
|
||||
child = list_entry(node, struct pci_dev, bus_list);
|
||||
sn_bus_free_data(child);
|
||||
}
|
||||
}
|
||||
sn_pci_unfixup_slot(dev);
|
||||
}
|
||||
|
||||
static u8 sn_power_status_get(struct hotplug_slot *bss_hotplug_slot)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pcibus_info *pcibus_info;
|
||||
u8 retval;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
|
||||
retval = pcibus_info->pbi_enabled_devices & (1 << slot->device_num);
|
||||
|
||||
return retval ? 1 : 0;
|
||||
}
|
||||
|
||||
static void sn_slot_mark_enable(struct hotplug_slot *bss_hotplug_slot,
|
||||
int device_num)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pcibus_info *pcibus_info;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
|
||||
pcibus_info->pbi_enabled_devices |= (1 << device_num);
|
||||
}
|
||||
|
||||
static void sn_slot_mark_disable(struct hotplug_slot *bss_hotplug_slot,
|
||||
int device_num)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pcibus_info *pcibus_info;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
|
||||
pcibus_info->pbi_enabled_devices &= ~(1 << device_num);
|
||||
}
|
||||
|
||||
static int sn_slot_enable(struct hotplug_slot *bss_hotplug_slot,
|
||||
int device_num)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pcibus_info *pcibus_info;
|
||||
struct pcibr_slot_enable_resp resp;
|
||||
int rc;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
|
||||
|
||||
/*
|
||||
* Power-on and initialize the slot in the SN
|
||||
* PCI infrastructure.
|
||||
*/
|
||||
rc = sal_pcibr_slot_enable(pcibus_info, device_num, &resp);
|
||||
|
||||
if (rc == PCI_SLOT_ALREADY_UP) {
|
||||
dev_dbg(slot->pci_bus->self, "is already active\n");
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
if (rc == PCI_L1_ERR) {
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"L1 failure %d with message: %s",
|
||||
resp.resp_sub_errno, resp.resp_l1_msg);
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
if (rc) {
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"insert failed with error %d sub-error %d\n",
|
||||
rc, resp.resp_sub_errno);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
sn_slot_mark_enable(bss_hotplug_slot, device_num);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int sn_slot_disable(struct hotplug_slot *bss_hotplug_slot,
|
||||
int device_num, int action)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pcibus_info *pcibus_info;
|
||||
struct pcibr_slot_disable_resp resp;
|
||||
int rc;
|
||||
|
||||
pcibus_info = SN_PCIBUS_BUSSOFT_INFO(slot->pci_bus);
|
||||
|
||||
rc = sal_pcibr_slot_disable(pcibus_info, device_num, action, &resp);
|
||||
|
||||
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_SLOT_ALREADY_DOWN) {
|
||||
dev_dbg(slot->pci_bus->self, "Slot %s already inactive\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_EMPTY_33MHZ) {
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"Cannot remove last 33MHz card\n");
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
if (action == PCI_REQ_SLOT_ELIGIBLE && rc == PCI_L1_ERR) {
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"L1 failure %d with message \n%s\n",
|
||||
resp.resp_sub_errno, resp.resp_l1_msg);
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
if (action == PCI_REQ_SLOT_ELIGIBLE && rc) {
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"remove failed with error %d sub-error %d\n",
|
||||
rc, resp.resp_sub_errno);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
if (action == PCI_REQ_SLOT_ELIGIBLE && !rc)
|
||||
return 0;
|
||||
|
||||
if (action == PCI_REQ_SLOT_DISABLE && !rc) {
|
||||
sn_slot_mark_disable(bss_hotplug_slot, device_num);
|
||||
dev_dbg(slot->pci_bus->self, "remove successful\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (action == PCI_REQ_SLOT_DISABLE && rc) {
|
||||
dev_dbg(slot->pci_bus->self,"remove failed rc = %d\n", rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pci_bus *new_bus = NULL;
|
||||
struct pci_dev *dev;
|
||||
int func, num_funcs;
|
||||
int new_ppb = 0;
|
||||
int rc;
|
||||
|
||||
/* Serialize the Linux PCI infrastructure */
|
||||
down(&sn_hotplug_sem);
|
||||
|
||||
/*
|
||||
* Power-on and initialize the slot in the SN
|
||||
* PCI infrastructure.
|
||||
*/
|
||||
rc = sn_slot_enable(bss_hotplug_slot, slot->device_num);
|
||||
if (rc) {
|
||||
up(&sn_hotplug_sem);
|
||||
return rc;
|
||||
}
|
||||
|
||||
num_funcs = pci_scan_slot(slot->pci_bus, PCI_DEVFN(slot->device_num+1,
|
||||
PCI_FUNC(0)));
|
||||
if (!num_funcs) {
|
||||
dev_dbg(slot->pci_bus->self, "no device in slot\n");
|
||||
up(&sn_hotplug_sem);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
sn_pci_controller_fixup(pci_domain_nr(slot->pci_bus),
|
||||
slot->pci_bus->number,
|
||||
slot->pci_bus);
|
||||
/*
|
||||
* Map SN resources for all functions on the card
|
||||
* to the Linux PCI interface and tell the drivers
|
||||
* about them.
|
||||
*/
|
||||
for (func = 0; func < num_funcs; func++) {
|
||||
dev = pci_get_slot(slot->pci_bus,
|
||||
PCI_DEVFN(slot->device_num + 1,
|
||||
PCI_FUNC(func)));
|
||||
|
||||
|
||||
if (dev) {
|
||||
if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
|
||||
unsigned char sec_bus;
|
||||
pci_read_config_byte(dev, PCI_SECONDARY_BUS,
|
||||
&sec_bus);
|
||||
new_bus = pci_add_new_bus(dev->bus, dev,
|
||||
sec_bus);
|
||||
pci_scan_child_bus(new_bus);
|
||||
sn_pci_controller_fixup(pci_domain_nr(new_bus),
|
||||
new_bus->number,
|
||||
new_bus);
|
||||
new_ppb = 1;
|
||||
}
|
||||
sn_bus_alloc_data(dev);
|
||||
pci_dev_put(dev);
|
||||
}
|
||||
}
|
||||
|
||||
/* Call the driver for the new device */
|
||||
pci_bus_add_devices(slot->pci_bus);
|
||||
/* Call the drivers for the new devices subordinate to PPB */
|
||||
if (new_ppb)
|
||||
pci_bus_add_devices(new_bus);
|
||||
|
||||
up(&sn_hotplug_sem);
|
||||
|
||||
if (rc == 0)
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"insert operation successful\n");
|
||||
else
|
||||
dev_dbg(slot->pci_bus->self,
|
||||
"insert operation failed rc = %d\n", rc);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int disable_slot(struct hotplug_slot *bss_hotplug_slot)
|
||||
{
|
||||
struct slot *slot = (struct slot *)bss_hotplug_slot->private;
|
||||
struct pci_dev *dev;
|
||||
int func;
|
||||
int rc;
|
||||
|
||||
/* Acquire update access to the bus */
|
||||
down(&sn_hotplug_sem);
|
||||
|
||||
/* is it okay to bring this slot down? */
|
||||
rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
|
||||
PCI_REQ_SLOT_ELIGIBLE);
|
||||
if (rc)
|
||||
goto leaving;
|
||||
|
||||
/* Free the SN resources assigned to the Linux device.*/
|
||||
for (func = 0; func < 8; func++) {
|
||||
dev = pci_get_slot(slot->pci_bus,
|
||||
PCI_DEVFN(slot->device_num+1,
|
||||
PCI_FUNC(func)));
|
||||
if (dev) {
|
||||
/*
|
||||
* Some drivers may use dma accesses during the
|
||||
* driver remove function. We release the sysdata
|
||||
* areas after the driver remove functions have
|
||||
* been called.
|
||||
*/
|
||||
sn_bus_store_sysdata(dev);
|
||||
sn_bus_free_data(dev);
|
||||
pci_remove_bus_device(dev);
|
||||
pci_dev_put(dev);
|
||||
}
|
||||
}
|
||||
|
||||
/* free the collected sysdata pointers */
|
||||
sn_bus_free_sysdata();
|
||||
|
||||
/* Deactivate slot */
|
||||
rc = sn_slot_disable(bss_hotplug_slot, slot->device_num,
|
||||
PCI_REQ_SLOT_DISABLE);
|
||||
leaving:
|
||||
/* Release the bus lock */
|
||||
up(&sn_hotplug_sem);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int get_power_status(struct hotplug_slot *bss_hotplug_slot, u8 *value)
|
||||
{
|
||||
down(&sn_hotplug_sem);
|
||||
*value = sn_power_status_get(bss_hotplug_slot);
|
||||
up(&sn_hotplug_sem);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot)
|
||||
{
|
||||
kfree(bss_hotplug_slot->info);
|
||||
kfree(bss_hotplug_slot->name);
|
||||
kfree(bss_hotplug_slot->private);
|
||||
kfree(bss_hotplug_slot);
|
||||
}
|
||||
|
||||
static int sn_hotplug_slot_register(struct pci_bus *pci_bus)
|
||||
{
|
||||
int device;
|
||||
struct hotplug_slot *bss_hotplug_slot;
|
||||
int rc = 0;
|
||||
|
||||
/*
|
||||
* Currently only four devices are supported,
|
||||
* in the future there maybe more -- up to 32.
|
||||
*/
|
||||
|
||||
for (device = 0; device < SN_MAX_HP_SLOTS ; device++) {
|
||||
if (sn_pci_slot_valid(pci_bus, device) != 1)
|
||||
continue;
|
||||
|
||||
bss_hotplug_slot = kcalloc(1,sizeof(struct hotplug_slot),
|
||||
GFP_KERNEL);
|
||||
if (!bss_hotplug_slot) {
|
||||
rc = -ENOMEM;
|
||||
goto alloc_err;
|
||||
}
|
||||
|
||||
bss_hotplug_slot->info =
|
||||
kcalloc(1,sizeof(struct hotplug_slot_info),
|
||||
GFP_KERNEL);
|
||||
if (!bss_hotplug_slot->info) {
|
||||
rc = -ENOMEM;
|
||||
goto alloc_err;
|
||||
}
|
||||
|
||||
if (sn_hp_slot_private_alloc(bss_hotplug_slot,
|
||||
pci_bus, device)) {
|
||||
rc = -ENOMEM;
|
||||
goto alloc_err;
|
||||
}
|
||||
|
||||
bss_hotplug_slot->ops = &sn_hotplug_slot_ops;
|
||||
bss_hotplug_slot->release = &sn_release_slot;
|
||||
|
||||
rc = pci_hp_register(bss_hotplug_slot);
|
||||
if (rc)
|
||||
goto register_err;
|
||||
}
|
||||
dev_dbg(pci_bus->self, "Registered bus with hotplug\n");
|
||||
return rc;
|
||||
|
||||
register_err:
|
||||
dev_dbg(pci_bus->self, "bus failed to register with err = %d\n",
|
||||
rc);
|
||||
|
||||
alloc_err:
|
||||
if (rc == -ENOMEM)
|
||||
dev_dbg(pci_bus->self, "Memory allocation error\n");
|
||||
|
||||
/* destroy THIS element */
|
||||
if (bss_hotplug_slot)
|
||||
sn_release_slot(bss_hotplug_slot);
|
||||
|
||||
/* destroy anything else on the list */
|
||||
while ((bss_hotplug_slot = sn_hp_destroy()))
|
||||
pci_hp_deregister(bss_hotplug_slot);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int sn_pci_hotplug_init(void)
|
||||
{
|
||||
struct pci_bus *pci_bus = NULL;
|
||||
int rc;
|
||||
int registered = 0;
|
||||
|
||||
INIT_LIST_HEAD(&sn_hp_list);
|
||||
|
||||
if (sn_sal_rev() < SGI_HOTPLUG_PROM_REV) {
|
||||
printk(KERN_ERR "%s: PROM version must be greater than 4.05\n",
|
||||
__FUNCTION__);
|
||||
return -EPERM;
|
||||
}
|
||||
|
||||
while ((pci_bus = pci_find_next_bus(pci_bus))) {
|
||||
if (!pci_bus->sysdata)
|
||||
continue;
|
||||
|
||||
rc = sn_pci_bus_valid(pci_bus);
|
||||
if (rc != 1) {
|
||||
dev_dbg(pci_bus->self, "not a valid hotplug bus\n");
|
||||
continue;
|
||||
}
|
||||
dev_dbg(pci_bus->self, "valid hotplug bus\n");
|
||||
|
||||
rc = sn_hotplug_slot_register(pci_bus);
|
||||
if (!rc)
|
||||
registered = 1;
|
||||
else {
|
||||
registered = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return registered == 1 ? 0 : -ENODEV;
|
||||
}
|
||||
|
||||
static void sn_pci_hotplug_exit(void)
|
||||
{
|
||||
struct hotplug_slot *bss_hotplug_slot;
|
||||
|
||||
while ((bss_hotplug_slot = sn_hp_destroy())) {
|
||||
pci_hp_deregister(bss_hotplug_slot);
|
||||
}
|
||||
|
||||
if (!list_empty(&sn_hp_list))
|
||||
printk(KERN_ERR "%s: internal list is not empty\n", __FILE__);
|
||||
}
|
||||
|
||||
module_init(sn_pci_hotplug_init);
|
||||
module_exit(sn_pci_hotplug_exit);
|
||||
|
|
@ -151,4 +151,8 @@ extern void pcibr_change_devices_irq(struct sn_irq_info *sn_irq_info);
|
|||
extern int pcibr_ate_alloc(struct pcibus_info *, int);
|
||||
extern void pcibr_ate_free(struct pcibus_info *, int);
|
||||
extern void ate_write(struct pcibus_info *, int, int, uint64_t);
|
||||
extern int sal_pcibr_slot_enable(struct pcibus_info *soft, int device,
|
||||
void *resp);
|
||||
extern int sal_pcibr_slot_disable(struct pcibus_info *soft, int device,
|
||||
int action, void *resp);
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -23,6 +23,8 @@
|
|||
#define SN_PCIBUS_BUSSOFT(pci_bus) \
|
||||
((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
|
||||
|
||||
#define SN_PCIBUS_BUSSOFT_INFO(pci_bus) \
|
||||
(struct pcibus_info *)((struct pcibus_bussoft *)(PCI_CONTROLLER((pci_bus))->platform_data))
|
||||
/*
|
||||
* Given a struct pci_dev, return the sn pcibus_bussoft struct. Note
|
||||
* that this is not equivalent to SN_PCIBUS_BUSSOFT(pci_dev->bus) due
|
||||
|
|
@ -56,6 +58,10 @@ struct pcidev_info {
|
|||
extern void sn_irq_fixup(struct pci_dev *pci_dev,
|
||||
struct sn_irq_info *sn_irq_info);
|
||||
extern void sn_irq_unfixup(struct pci_dev *pci_dev);
|
||||
extern void sn_pci_controller_fixup(int segment, int busnum,
|
||||
struct pci_bus *bus);
|
||||
extern void sn_bus_store_sysdata(struct pci_dev *dev);
|
||||
extern void sn_bus_free_sysdata(void);
|
||||
extern void sn_pci_fixup_slot(struct pci_dev *dev);
|
||||
extern void sn_pci_unfixup_slot(struct pci_dev *dev);
|
||||
extern void sn_irq_lh_init(void);
|
||||
|
|
|
|||
Loading…
Reference in New Issue