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path: root/drivers/pci/hotplug/ibmphp_ebda.c
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Diffstat (limited to 'drivers/pci/hotplug/ibmphp_ebda.c')
-rw-r--r--drivers/pci/hotplug/ibmphp_ebda.c1171
1 files changed, 1171 insertions, 0 deletions
diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c
new file mode 100644
index 000000000..6f8e90e3e
--- /dev/null
+++ b/drivers/pci/hotplug/ibmphp_ebda.c
@@ -0,0 +1,1171 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * IBM Hot Plug Controller Driver
+ *
+ * Written By: Tong Yu, IBM Corporation
+ *
+ * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001-2003 IBM Corp.
+ *
+ * All rights reserved.
+ *
+ * Send feedback to <gregkh@us.ibm.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/init.h>
+#include "ibmphp.h"
+
+/*
+ * POST builds data blocks(in this data block definition, a char-1
+ * byte, short(or word)-2 byte, long(dword)-4 byte) in the Extended
+ * BIOS Data Area which describe the configuration of the hot-plug
+ * controllers and resources used by the PCI Hot-Plug devices.
+ *
+ * This file walks EBDA, maps data block from physical addr,
+ * reconstruct linked lists about all system resource(MEM, PFM, IO)
+ * already assigned by POST, as well as linked lists about hot plug
+ * controllers (ctlr#, slot#, bus&slot features...)
+ */
+
+/* Global lists */
+LIST_HEAD(ibmphp_ebda_pci_rsrc_head);
+LIST_HEAD(ibmphp_slot_head);
+
+/* Local variables */
+static struct ebda_hpc_list *hpc_list_ptr;
+static struct ebda_rsrc_list *rsrc_list_ptr;
+static struct rio_table_hdr *rio_table_ptr = NULL;
+static LIST_HEAD(ebda_hpc_head);
+static LIST_HEAD(bus_info_head);
+static LIST_HEAD(rio_vg_head);
+static LIST_HEAD(rio_lo_head);
+static LIST_HEAD(opt_vg_head);
+static LIST_HEAD(opt_lo_head);
+static void __iomem *io_mem;
+
+/* Local functions */
+static int ebda_rsrc_controller(void);
+static int ebda_rsrc_rsrc(void);
+static int ebda_rio_table(void);
+
+static struct ebda_hpc_list * __init alloc_ebda_hpc_list(void)
+{
+ return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
+}
+
+static struct controller *alloc_ebda_hpc(u32 slot_count, u32 bus_count)
+{
+ struct controller *controller;
+ struct ebda_hpc_slot *slots;
+ struct ebda_hpc_bus *buses;
+
+ controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
+ if (!controller)
+ goto error;
+
+ slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
+ if (!slots)
+ goto error_contr;
+ controller->slots = slots;
+
+ buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
+ if (!buses)
+ goto error_slots;
+ controller->buses = buses;
+
+ return controller;
+error_slots:
+ kfree(controller->slots);
+error_contr:
+ kfree(controller);
+error:
+ return NULL;
+}
+
+static void free_ebda_hpc(struct controller *controller)
+{
+ kfree(controller->slots);
+ kfree(controller->buses);
+ kfree(controller);
+}
+
+static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list(void)
+{
+ return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
+}
+
+static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc(void)
+{
+ return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
+}
+
+static void __init print_bus_info(void)
+{
+ struct bus_info *ptr;
+
+ list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
+ debug("%s - slot_min = %x\n", __func__, ptr->slot_min);
+ debug("%s - slot_max = %x\n", __func__, ptr->slot_max);
+ debug("%s - slot_count = %x\n", __func__, ptr->slot_count);
+ debug("%s - bus# = %x\n", __func__, ptr->busno);
+ debug("%s - current_speed = %x\n", __func__, ptr->current_speed);
+ debug("%s - controller_id = %x\n", __func__, ptr->controller_id);
+
+ debug("%s - slots_at_33_conv = %x\n", __func__, ptr->slots_at_33_conv);
+ debug("%s - slots_at_66_conv = %x\n", __func__, ptr->slots_at_66_conv);
+ debug("%s - slots_at_66_pcix = %x\n", __func__, ptr->slots_at_66_pcix);
+ debug("%s - slots_at_100_pcix = %x\n", __func__, ptr->slots_at_100_pcix);
+ debug("%s - slots_at_133_pcix = %x\n", __func__, ptr->slots_at_133_pcix);
+
+ }
+}
+
+static void print_lo_info(void)
+{
+ struct rio_detail *ptr;
+ debug("print_lo_info ----\n");
+ list_for_each_entry(ptr, &rio_lo_head, rio_detail_list) {
+ debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
+ debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
+ debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
+ debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
+ debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
+ debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
+
+ }
+}
+
+static void print_vg_info(void)
+{
+ struct rio_detail *ptr;
+ debug("%s ---\n", __func__);
+ list_for_each_entry(ptr, &rio_vg_head, rio_detail_list) {
+ debug("%s - rio_node_id = %x\n", __func__, ptr->rio_node_id);
+ debug("%s - rio_type = %x\n", __func__, ptr->rio_type);
+ debug("%s - owner_id = %x\n", __func__, ptr->owner_id);
+ debug("%s - first_slot_num = %x\n", __func__, ptr->first_slot_num);
+ debug("%s - wpindex = %x\n", __func__, ptr->wpindex);
+ debug("%s - chassis_num = %x\n", __func__, ptr->chassis_num);
+
+ }
+}
+
+static void __init print_ebda_pci_rsrc(void)
+{
+ struct ebda_pci_rsrc *ptr;
+
+ list_for_each_entry(ptr, &ibmphp_ebda_pci_rsrc_head, ebda_pci_rsrc_list) {
+ debug("%s - rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
+ __func__, ptr->rsrc_type, ptr->bus_num, ptr->dev_fun, ptr->start_addr, ptr->end_addr);
+ }
+}
+
+static void __init print_ibm_slot(void)
+{
+ struct slot *ptr;
+
+ list_for_each_entry(ptr, &ibmphp_slot_head, ibm_slot_list) {
+ debug("%s - slot_number: %x\n", __func__, ptr->number);
+ }
+}
+
+static void __init print_opt_vg(void)
+{
+ struct opt_rio *ptr;
+ debug("%s ---\n", __func__);
+ list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
+ debug("%s - rio_type %x\n", __func__, ptr->rio_type);
+ debug("%s - chassis_num: %x\n", __func__, ptr->chassis_num);
+ debug("%s - first_slot_num: %x\n", __func__, ptr->first_slot_num);
+ debug("%s - middle_num: %x\n", __func__, ptr->middle_num);
+ }
+}
+
+static void __init print_ebda_hpc(void)
+{
+ struct controller *hpc_ptr;
+ u16 index;
+
+ list_for_each_entry(hpc_ptr, &ebda_hpc_head, ebda_hpc_list) {
+ for (index = 0; index < hpc_ptr->slot_count; index++) {
+ debug("%s - physical slot#: %x\n", __func__, hpc_ptr->slots[index].slot_num);
+ debug("%s - pci bus# of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_bus_num);
+ debug("%s - index into ctlr addr: %x\n", __func__, hpc_ptr->slots[index].ctl_index);
+ debug("%s - cap of the slot: %x\n", __func__, hpc_ptr->slots[index].slot_cap);
+ }
+
+ for (index = 0; index < hpc_ptr->bus_count; index++)
+ debug("%s - bus# of each bus controlled by this ctlr: %x\n", __func__, hpc_ptr->buses[index].bus_num);
+
+ debug("%s - type of hpc: %x\n", __func__, hpc_ptr->ctlr_type);
+ switch (hpc_ptr->ctlr_type) {
+ case 1:
+ debug("%s - bus: %x\n", __func__, hpc_ptr->u.pci_ctlr.bus);
+ debug("%s - dev_fun: %x\n", __func__, hpc_ptr->u.pci_ctlr.dev_fun);
+ debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
+ break;
+
+ case 0:
+ debug("%s - io_start: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_start);
+ debug("%s - io_end: %x\n", __func__, hpc_ptr->u.isa_ctlr.io_end);
+ debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
+ break;
+
+ case 2:
+ case 4:
+ debug("%s - wpegbbar: %lx\n", __func__, hpc_ptr->u.wpeg_ctlr.wpegbbar);
+ debug("%s - i2c_addr: %x\n", __func__, hpc_ptr->u.wpeg_ctlr.i2c_addr);
+ debug("%s - irq: %x\n", __func__, hpc_ptr->irq);
+ break;
+ }
+ }
+}
+
+int __init ibmphp_access_ebda(void)
+{
+ u8 format, num_ctlrs, rio_complete, hs_complete, ebda_sz;
+ u16 ebda_seg, num_entries, next_offset, offset, blk_id, sub_addr, re, rc_id, re_id, base;
+ int rc = 0;
+
+
+ rio_complete = 0;
+ hs_complete = 0;
+
+ io_mem = ioremap((0x40 << 4) + 0x0e, 2);
+ if (!io_mem)
+ return -ENOMEM;
+ ebda_seg = readw(io_mem);
+ iounmap(io_mem);
+ debug("returned ebda segment: %x\n", ebda_seg);
+
+ io_mem = ioremap(ebda_seg<<4, 1);
+ if (!io_mem)
+ return -ENOMEM;
+ ebda_sz = readb(io_mem);
+ iounmap(io_mem);
+ debug("ebda size: %d(KiB)\n", ebda_sz);
+ if (ebda_sz == 0)
+ return -ENOMEM;
+
+ io_mem = ioremap(ebda_seg<<4, (ebda_sz * 1024));
+ if (!io_mem)
+ return -ENOMEM;
+ next_offset = 0x180;
+
+ for (;;) {
+ offset = next_offset;
+
+ /* Make sure what we read is still in the mapped section */
+ if (WARN(offset > (ebda_sz * 1024 - 4),
+ "ibmphp_ebda: next read is beyond ebda_sz\n"))
+ break;
+
+ next_offset = readw(io_mem + offset); /* offset of next blk */
+
+ offset += 2;
+ if (next_offset == 0) /* 0 indicate it's last blk */
+ break;
+ blk_id = readw(io_mem + offset); /* this blk id */
+
+ offset += 2;
+ /* check if it is hot swap block or rio block */
+ if (blk_id != 0x4853 && blk_id != 0x4752)
+ continue;
+ /* found hs table */
+ if (blk_id == 0x4853) {
+ debug("now enter hot swap block---\n");
+ debug("hot blk id: %x\n", blk_id);
+ format = readb(io_mem + offset);
+
+ offset += 1;
+ if (format != 4)
+ goto error_nodev;
+ debug("hot blk format: %x\n", format);
+ /* hot swap sub blk */
+ base = offset;
+
+ sub_addr = base;
+ re = readw(io_mem + sub_addr); /* next sub blk */
+
+ sub_addr += 2;
+ rc_id = readw(io_mem + sub_addr); /* sub blk id */
+
+ sub_addr += 2;
+ if (rc_id != 0x5243)
+ goto error_nodev;
+ /* rc sub blk signature */
+ num_ctlrs = readb(io_mem + sub_addr);
+
+ sub_addr += 1;
+ hpc_list_ptr = alloc_ebda_hpc_list();
+ if (!hpc_list_ptr) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ hpc_list_ptr->format = format;
+ hpc_list_ptr->num_ctlrs = num_ctlrs;
+ hpc_list_ptr->phys_addr = sub_addr; /* offset of RSRC_CONTROLLER blk */
+ debug("info about hpc descriptor---\n");
+ debug("hot blk format: %x\n", format);
+ debug("num of controller: %x\n", num_ctlrs);
+ debug("offset of hpc data structure entries: %x\n ", sub_addr);
+
+ sub_addr = base + re; /* re sub blk */
+ /* FIXME: rc is never used/checked */
+ rc = readw(io_mem + sub_addr); /* next sub blk */
+
+ sub_addr += 2;
+ re_id = readw(io_mem + sub_addr); /* sub blk id */
+
+ sub_addr += 2;
+ if (re_id != 0x5245)
+ goto error_nodev;
+
+ /* signature of re */
+ num_entries = readw(io_mem + sub_addr);
+
+ sub_addr += 2; /* offset of RSRC_ENTRIES blk */
+ rsrc_list_ptr = alloc_ebda_rsrc_list();
+ if (!rsrc_list_ptr) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ rsrc_list_ptr->format = format;
+ rsrc_list_ptr->num_entries = num_entries;
+ rsrc_list_ptr->phys_addr = sub_addr;
+
+ debug("info about rsrc descriptor---\n");
+ debug("format: %x\n", format);
+ debug("num of rsrc: %x\n", num_entries);
+ debug("offset of rsrc data structure entries: %x\n ", sub_addr);
+
+ hs_complete = 1;
+ } else {
+ /* found rio table, blk_id == 0x4752 */
+ debug("now enter io table ---\n");
+ debug("rio blk id: %x\n", blk_id);
+
+ rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
+ if (!rio_table_ptr) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ rio_table_ptr->ver_num = readb(io_mem + offset);
+ rio_table_ptr->scal_count = readb(io_mem + offset + 1);
+ rio_table_ptr->riodev_count = readb(io_mem + offset + 2);
+ rio_table_ptr->offset = offset + 3 ;
+
+ debug("info about rio table hdr ---\n");
+ debug("ver_num: %x\nscal_count: %x\nriodev_count: %x\noffset of rio table: %x\n ",
+ rio_table_ptr->ver_num, rio_table_ptr->scal_count,
+ rio_table_ptr->riodev_count, rio_table_ptr->offset);
+
+ rio_complete = 1;
+ }
+ }
+
+ if (!hs_complete && !rio_complete)
+ goto error_nodev;
+
+ if (rio_table_ptr) {
+ if (rio_complete && rio_table_ptr->ver_num == 3) {
+ rc = ebda_rio_table();
+ if (rc)
+ goto out;
+ }
+ }
+ rc = ebda_rsrc_controller();
+ if (rc)
+ goto out;
+
+ rc = ebda_rsrc_rsrc();
+ goto out;
+error_nodev:
+ rc = -ENODEV;
+out:
+ iounmap(io_mem);
+ return rc;
+}
+
+/*
+ * map info of scalability details and rio details from physical address
+ */
+static int __init ebda_rio_table(void)
+{
+ u16 offset;
+ u8 i;
+ struct rio_detail *rio_detail_ptr;
+
+ offset = rio_table_ptr->offset;
+ offset += 12 * rio_table_ptr->scal_count;
+
+ // we do concern about rio details
+ for (i = 0; i < rio_table_ptr->riodev_count; i++) {
+ rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
+ if (!rio_detail_ptr)
+ return -ENOMEM;
+ rio_detail_ptr->rio_node_id = readb(io_mem + offset);
+ rio_detail_ptr->bbar = readl(io_mem + offset + 1);
+ rio_detail_ptr->rio_type = readb(io_mem + offset + 5);
+ rio_detail_ptr->owner_id = readb(io_mem + offset + 6);
+ rio_detail_ptr->port0_node_connect = readb(io_mem + offset + 7);
+ rio_detail_ptr->port0_port_connect = readb(io_mem + offset + 8);
+ rio_detail_ptr->port1_node_connect = readb(io_mem + offset + 9);
+ rio_detail_ptr->port1_port_connect = readb(io_mem + offset + 10);
+ rio_detail_ptr->first_slot_num = readb(io_mem + offset + 11);
+ rio_detail_ptr->status = readb(io_mem + offset + 12);
+ rio_detail_ptr->wpindex = readb(io_mem + offset + 13);
+ rio_detail_ptr->chassis_num = readb(io_mem + offset + 14);
+// debug("rio_node_id: %x\nbbar: %x\nrio_type: %x\nowner_id: %x\nport0_node: %x\nport0_port: %x\nport1_node: %x\nport1_port: %x\nfirst_slot_num: %x\nstatus: %x\n", rio_detail_ptr->rio_node_id, rio_detail_ptr->bbar, rio_detail_ptr->rio_type, rio_detail_ptr->owner_id, rio_detail_ptr->port0_node_connect, rio_detail_ptr->port0_port_connect, rio_detail_ptr->port1_node_connect, rio_detail_ptr->port1_port_connect, rio_detail_ptr->first_slot_num, rio_detail_ptr->status);
+ //create linked list of chassis
+ if (rio_detail_ptr->rio_type == 4 || rio_detail_ptr->rio_type == 5)
+ list_add(&rio_detail_ptr->rio_detail_list, &rio_vg_head);
+ //create linked list of expansion box
+ else if (rio_detail_ptr->rio_type == 6 || rio_detail_ptr->rio_type == 7)
+ list_add(&rio_detail_ptr->rio_detail_list, &rio_lo_head);
+ else
+ // not in my concern
+ kfree(rio_detail_ptr);
+ offset += 15;
+ }
+ print_lo_info();
+ print_vg_info();
+ return 0;
+}
+
+/*
+ * reorganizing linked list of chassis
+ */
+static struct opt_rio *search_opt_vg(u8 chassis_num)
+{
+ struct opt_rio *ptr;
+ list_for_each_entry(ptr, &opt_vg_head, opt_rio_list) {
+ if (ptr->chassis_num == chassis_num)
+ return ptr;
+ }
+ return NULL;
+}
+
+static int __init combine_wpg_for_chassis(void)
+{
+ struct opt_rio *opt_rio_ptr = NULL;
+ struct rio_detail *rio_detail_ptr = NULL;
+
+ list_for_each_entry(rio_detail_ptr, &rio_vg_head, rio_detail_list) {
+ opt_rio_ptr = search_opt_vg(rio_detail_ptr->chassis_num);
+ if (!opt_rio_ptr) {
+ opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
+ if (!opt_rio_ptr)
+ return -ENOMEM;
+ opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
+ opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
+ opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
+ opt_rio_ptr->middle_num = rio_detail_ptr->first_slot_num;
+ list_add(&opt_rio_ptr->opt_rio_list, &opt_vg_head);
+ } else {
+ opt_rio_ptr->first_slot_num = min(opt_rio_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
+ opt_rio_ptr->middle_num = max(opt_rio_ptr->middle_num, rio_detail_ptr->first_slot_num);
+ }
+ }
+ print_opt_vg();
+ return 0;
+}
+
+/*
+ * reorganizing linked list of expansion box
+ */
+static struct opt_rio_lo *search_opt_lo(u8 chassis_num)
+{
+ struct opt_rio_lo *ptr;
+ list_for_each_entry(ptr, &opt_lo_head, opt_rio_lo_list) {
+ if (ptr->chassis_num == chassis_num)
+ return ptr;
+ }
+ return NULL;
+}
+
+static int combine_wpg_for_expansion(void)
+{
+ struct opt_rio_lo *opt_rio_lo_ptr = NULL;
+ struct rio_detail *rio_detail_ptr = NULL;
+
+ list_for_each_entry(rio_detail_ptr, &rio_lo_head, rio_detail_list) {
+ opt_rio_lo_ptr = search_opt_lo(rio_detail_ptr->chassis_num);
+ if (!opt_rio_lo_ptr) {
+ opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
+ if (!opt_rio_lo_ptr)
+ return -ENOMEM;
+ opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
+ opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
+ opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
+ opt_rio_lo_ptr->middle_num = rio_detail_ptr->first_slot_num;
+ opt_rio_lo_ptr->pack_count = 1;
+
+ list_add(&opt_rio_lo_ptr->opt_rio_lo_list, &opt_lo_head);
+ } else {
+ opt_rio_lo_ptr->first_slot_num = min(opt_rio_lo_ptr->first_slot_num, rio_detail_ptr->first_slot_num);
+ opt_rio_lo_ptr->middle_num = max(opt_rio_lo_ptr->middle_num, rio_detail_ptr->first_slot_num);
+ opt_rio_lo_ptr->pack_count = 2;
+ }
+ }
+ return 0;
+}
+
+
+/* Since we don't know the max slot number per each chassis, hence go
+ * through the list of all chassis to find out the range
+ * Arguments: slot_num, 1st slot number of the chassis we think we are on,
+ * var (0 = chassis, 1 = expansion box)
+ */
+static int first_slot_num(u8 slot_num, u8 first_slot, u8 var)
+{
+ struct opt_rio *opt_vg_ptr = NULL;
+ struct opt_rio_lo *opt_lo_ptr = NULL;
+ int rc = 0;
+
+ if (!var) {
+ list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
+ if ((first_slot < opt_vg_ptr->first_slot_num) && (slot_num >= opt_vg_ptr->first_slot_num)) {
+ rc = -ENODEV;
+ break;
+ }
+ }
+ } else {
+ list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
+ if ((first_slot < opt_lo_ptr->first_slot_num) && (slot_num >= opt_lo_ptr->first_slot_num)) {
+ rc = -ENODEV;
+ break;
+ }
+ }
+ }
+ return rc;
+}
+
+static struct opt_rio_lo *find_rxe_num(u8 slot_num)
+{
+ struct opt_rio_lo *opt_lo_ptr;
+
+ list_for_each_entry(opt_lo_ptr, &opt_lo_head, opt_rio_lo_list) {
+ //check to see if this slot_num belongs to expansion box
+ if ((slot_num >= opt_lo_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_lo_ptr->first_slot_num, 1)))
+ return opt_lo_ptr;
+ }
+ return NULL;
+}
+
+static struct opt_rio *find_chassis_num(u8 slot_num)
+{
+ struct opt_rio *opt_vg_ptr;
+
+ list_for_each_entry(opt_vg_ptr, &opt_vg_head, opt_rio_list) {
+ //check to see if this slot_num belongs to chassis
+ if ((slot_num >= opt_vg_ptr->first_slot_num) && (!first_slot_num(slot_num, opt_vg_ptr->first_slot_num, 0)))
+ return opt_vg_ptr;
+ }
+ return NULL;
+}
+
+/* This routine will find out how many slots are in the chassis, so that
+ * the slot numbers for rxe100 would start from 1, and not from 7, or 6 etc
+ */
+static u8 calculate_first_slot(u8 slot_num)
+{
+ u8 first_slot = 1;
+ struct slot *slot_cur;
+
+ list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
+ if (slot_cur->ctrl) {
+ if ((slot_cur->ctrl->ctlr_type != 4) && (slot_cur->ctrl->ending_slot_num > first_slot) && (slot_num > slot_cur->ctrl->ending_slot_num))
+ first_slot = slot_cur->ctrl->ending_slot_num;
+ }
+ }
+ return first_slot + 1;
+
+}
+
+#define SLOT_NAME_SIZE 30
+
+static char *create_file_name(struct slot *slot_cur)
+{
+ struct opt_rio *opt_vg_ptr = NULL;
+ struct opt_rio_lo *opt_lo_ptr = NULL;
+ static char str[SLOT_NAME_SIZE];
+ int which = 0; /* rxe = 1, chassis = 0 */
+ u8 number = 1; /* either chassis or rxe # */
+ u8 first_slot = 1;
+ u8 slot_num;
+ u8 flag = 0;
+
+ if (!slot_cur) {
+ err("Structure passed is empty\n");
+ return NULL;
+ }
+
+ slot_num = slot_cur->number;
+
+ memset(str, 0, sizeof(str));
+
+ if (rio_table_ptr) {
+ if (rio_table_ptr->ver_num == 3) {
+ opt_vg_ptr = find_chassis_num(slot_num);
+ opt_lo_ptr = find_rxe_num(slot_num);
+ }
+ }
+ if (opt_vg_ptr) {
+ if (opt_lo_ptr) {
+ if ((slot_num - opt_vg_ptr->first_slot_num) > (slot_num - opt_lo_ptr->first_slot_num)) {
+ number = opt_lo_ptr->chassis_num;
+ first_slot = opt_lo_ptr->first_slot_num;
+ which = 1; /* it is RXE */
+ } else {
+ first_slot = opt_vg_ptr->first_slot_num;
+ number = opt_vg_ptr->chassis_num;
+ which = 0;
+ }
+ } else {
+ first_slot = opt_vg_ptr->first_slot_num;
+ number = opt_vg_ptr->chassis_num;
+ which = 0;
+ }
+ ++flag;
+ } else if (opt_lo_ptr) {
+ number = opt_lo_ptr->chassis_num;
+ first_slot = opt_lo_ptr->first_slot_num;
+ which = 1;
+ ++flag;
+ } else if (rio_table_ptr) {
+ if (rio_table_ptr->ver_num == 3) {
+ /* if both NULL and we DO have correct RIO table in BIOS */
+ return NULL;
+ }
+ }
+ if (!flag) {
+ if (slot_cur->ctrl->ctlr_type == 4) {
+ first_slot = calculate_first_slot(slot_num);
+ which = 1;
+ } else {
+ which = 0;
+ }
+ }
+
+ sprintf(str, "%s%dslot%d",
+ which == 0 ? "chassis" : "rxe",
+ number, slot_num - first_slot + 1);
+ return str;
+}
+
+static int fillslotinfo(struct hotplug_slot *hotplug_slot)
+{
+ struct slot *slot;
+ int rc = 0;
+
+ if (!hotplug_slot || !hotplug_slot->private)
+ return -EINVAL;
+
+ slot = hotplug_slot->private;
+ rc = ibmphp_hpc_readslot(slot, READ_ALLSTAT, NULL);
+ if (rc)
+ return rc;
+
+ // power - enabled:1 not:0
+ hotplug_slot->info->power_status = SLOT_POWER(slot->status);
+
+ // attention - off:0, on:1, blinking:2
+ hotplug_slot->info->attention_status = SLOT_ATTN(slot->status, slot->ext_status);
+
+ // latch - open:1 closed:0
+ hotplug_slot->info->latch_status = SLOT_LATCH(slot->status);
+
+ // pci board - present:1 not:0
+ if (SLOT_PRESENT(slot->status))
+ hotplug_slot->info->adapter_status = 1;
+ else
+ hotplug_slot->info->adapter_status = 0;
+/*
+ if (slot->bus_on->supported_bus_mode
+ && (slot->bus_on->supported_speed == BUS_SPEED_66))
+ hotplug_slot->info->max_bus_speed_status = BUS_SPEED_66PCIX;
+ else
+ hotplug_slot->info->max_bus_speed_status = slot->bus_on->supported_speed;
+*/
+
+ return rc;
+}
+
+static struct pci_driver ibmphp_driver;
+
+/*
+ * map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
+ * each hpc from physical address to a list of hot plug controllers based on
+ * hpc descriptors.
+ */
+static int __init ebda_rsrc_controller(void)
+{
+ u16 addr, addr_slot, addr_bus;
+ u8 ctlr_id, temp, bus_index;
+ u16 ctlr, slot, bus;
+ u16 slot_num, bus_num, index;
+ struct hotplug_slot *hp_slot_ptr;
+ struct controller *hpc_ptr;
+ struct ebda_hpc_bus *bus_ptr;
+ struct ebda_hpc_slot *slot_ptr;
+ struct bus_info *bus_info_ptr1, *bus_info_ptr2;
+ int rc;
+ struct slot *tmp_slot;
+ char name[SLOT_NAME_SIZE];
+
+ addr = hpc_list_ptr->phys_addr;
+ for (ctlr = 0; ctlr < hpc_list_ptr->num_ctlrs; ctlr++) {
+ bus_index = 1;
+ ctlr_id = readb(io_mem + addr);
+ addr += 1;
+ slot_num = readb(io_mem + addr);
+
+ addr += 1;
+ addr_slot = addr; /* offset of slot structure */
+ addr += (slot_num * 4);
+
+ bus_num = readb(io_mem + addr);
+
+ addr += 1;
+ addr_bus = addr; /* offset of bus */
+ addr += (bus_num * 9); /* offset of ctlr_type */
+ temp = readb(io_mem + addr);
+
+ addr += 1;
+ /* init hpc structure */
+ hpc_ptr = alloc_ebda_hpc(slot_num, bus_num);
+ if (!hpc_ptr) {
+ rc = -ENOMEM;
+ goto error_no_hpc;
+ }
+ hpc_ptr->ctlr_id = ctlr_id;
+ hpc_ptr->ctlr_relative_id = ctlr;
+ hpc_ptr->slot_count = slot_num;
+ hpc_ptr->bus_count = bus_num;
+ debug("now enter ctlr data structure ---\n");
+ debug("ctlr id: %x\n", ctlr_id);
+ debug("ctlr_relative_id: %x\n", hpc_ptr->ctlr_relative_id);
+ debug("count of slots controlled by this ctlr: %x\n", slot_num);
+ debug("count of buses controlled by this ctlr: %x\n", bus_num);
+
+ /* init slot structure, fetch slot, bus, cap... */
+ slot_ptr = hpc_ptr->slots;
+ for (slot = 0; slot < slot_num; slot++) {
+ slot_ptr->slot_num = readb(io_mem + addr_slot);
+ slot_ptr->slot_bus_num = readb(io_mem + addr_slot + slot_num);
+ slot_ptr->ctl_index = readb(io_mem + addr_slot + 2*slot_num);
+ slot_ptr->slot_cap = readb(io_mem + addr_slot + 3*slot_num);
+
+ // create bus_info lined list --- if only one slot per bus: slot_min = slot_max
+
+ bus_info_ptr2 = ibmphp_find_same_bus_num(slot_ptr->slot_bus_num);
+ if (!bus_info_ptr2) {
+ bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
+ if (!bus_info_ptr1) {
+ rc = -ENOMEM;
+ goto error_no_hp_slot;
+ }
+ bus_info_ptr1->slot_min = slot_ptr->slot_num;
+ bus_info_ptr1->slot_max = slot_ptr->slot_num;
+ bus_info_ptr1->slot_count += 1;
+ bus_info_ptr1->busno = slot_ptr->slot_bus_num;
+ bus_info_ptr1->index = bus_index++;
+ bus_info_ptr1->current_speed = 0xff;
+ bus_info_ptr1->current_bus_mode = 0xff;
+
+ bus_info_ptr1->controller_id = hpc_ptr->ctlr_id;
+
+ list_add_tail(&bus_info_ptr1->bus_info_list, &bus_info_head);
+
+ } else {
+ bus_info_ptr2->slot_min = min(bus_info_ptr2->slot_min, slot_ptr->slot_num);
+ bus_info_ptr2->slot_max = max(bus_info_ptr2->slot_max, slot_ptr->slot_num);
+ bus_info_ptr2->slot_count += 1;
+
+ }
+
+ // end of creating the bus_info linked list
+
+ slot_ptr++;
+ addr_slot += 1;
+ }
+
+ /* init bus structure */
+ bus_ptr = hpc_ptr->buses;
+ for (bus = 0; bus < bus_num; bus++) {
+ bus_ptr->bus_num = readb(io_mem + addr_bus + bus);
+ bus_ptr->slots_at_33_conv = readb(io_mem + addr_bus + bus_num + 8 * bus);
+ bus_ptr->slots_at_66_conv = readb(io_mem + addr_bus + bus_num + 8 * bus + 1);
+
+ bus_ptr->slots_at_66_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 2);
+
+ bus_ptr->slots_at_100_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 3);
+
+ bus_ptr->slots_at_133_pcix = readb(io_mem + addr_bus + bus_num + 8 * bus + 4);
+
+ bus_info_ptr2 = ibmphp_find_same_bus_num(bus_ptr->bus_num);
+ if (bus_info_ptr2) {
+ bus_info_ptr2->slots_at_33_conv = bus_ptr->slots_at_33_conv;
+ bus_info_ptr2->slots_at_66_conv = bus_ptr->slots_at_66_conv;
+ bus_info_ptr2->slots_at_66_pcix = bus_ptr->slots_at_66_pcix;
+ bus_info_ptr2->slots_at_100_pcix = bus_ptr->slots_at_100_pcix;
+ bus_info_ptr2->slots_at_133_pcix = bus_ptr->slots_at_133_pcix;
+ }
+ bus_ptr++;
+ }
+
+ hpc_ptr->ctlr_type = temp;
+
+ switch (hpc_ptr->ctlr_type) {
+ case 1:
+ hpc_ptr->u.pci_ctlr.bus = readb(io_mem + addr);
+ hpc_ptr->u.pci_ctlr.dev_fun = readb(io_mem + addr + 1);
+ hpc_ptr->irq = readb(io_mem + addr + 2);
+ addr += 3;
+ debug("ctrl bus = %x, ctlr devfun = %x, irq = %x\n",
+ hpc_ptr->u.pci_ctlr.bus,
+ hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
+ break;
+
+ case 0:
+ hpc_ptr->u.isa_ctlr.io_start = readw(io_mem + addr);
+ hpc_ptr->u.isa_ctlr.io_end = readw(io_mem + addr + 2);
+ if (!request_region(hpc_ptr->u.isa_ctlr.io_start,
+ (hpc_ptr->u.isa_ctlr.io_end - hpc_ptr->u.isa_ctlr.io_start + 1),
+ "ibmphp")) {
+ rc = -ENODEV;
+ goto error_no_hp_slot;
+ }
+ hpc_ptr->irq = readb(io_mem + addr + 4);
+ addr += 5;
+ break;
+
+ case 2:
+ case 4:
+ hpc_ptr->u.wpeg_ctlr.wpegbbar = readl(io_mem + addr);
+ hpc_ptr->u.wpeg_ctlr.i2c_addr = readb(io_mem + addr + 4);
+ hpc_ptr->irq = readb(io_mem + addr + 5);
+ addr += 6;
+ break;
+ default:
+ rc = -ENODEV;
+ goto error_no_hp_slot;
+ }
+
+ //reorganize chassis' linked list
+ combine_wpg_for_chassis();
+ combine_wpg_for_expansion();
+ hpc_ptr->revision = 0xff;
+ hpc_ptr->options = 0xff;
+ hpc_ptr->starting_slot_num = hpc_ptr->slots[0].slot_num;
+ hpc_ptr->ending_slot_num = hpc_ptr->slots[slot_num-1].slot_num;
+
+ // register slots with hpc core as well as create linked list of ibm slot
+ for (index = 0; index < hpc_ptr->slot_count; index++) {
+
+ hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
+ if (!hp_slot_ptr) {
+ rc = -ENOMEM;
+ goto error_no_hp_slot;
+ }
+
+ hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
+ if (!hp_slot_ptr->info) {
+ rc = -ENOMEM;
+ goto error_no_hp_info;
+ }
+
+ tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
+ if (!tmp_slot) {
+ rc = -ENOMEM;
+ goto error_no_slot;
+ }
+
+ tmp_slot->flag = 1;
+
+ tmp_slot->capabilities = hpc_ptr->slots[index].slot_cap;
+ if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_133_MAX) == EBDA_SLOT_133_MAX)
+ tmp_slot->supported_speed = 3;
+ else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_100_MAX) == EBDA_SLOT_100_MAX)
+ tmp_slot->supported_speed = 2;
+ else if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_66_MAX) == EBDA_SLOT_66_MAX)
+ tmp_slot->supported_speed = 1;
+
+ if ((hpc_ptr->slots[index].slot_cap & EBDA_SLOT_PCIX_CAP) == EBDA_SLOT_PCIX_CAP)
+ tmp_slot->supported_bus_mode = 1;
+ else
+ tmp_slot->supported_bus_mode = 0;
+
+
+ tmp_slot->bus = hpc_ptr->slots[index].slot_bus_num;
+
+ bus_info_ptr1 = ibmphp_find_same_bus_num(hpc_ptr->slots[index].slot_bus_num);
+ if (!bus_info_ptr1) {
+ kfree(tmp_slot);
+ rc = -ENODEV;
+ goto error;
+ }
+ tmp_slot->bus_on = bus_info_ptr1;
+ bus_info_ptr1 = NULL;
+ tmp_slot->ctrl = hpc_ptr;
+
+ tmp_slot->ctlr_index = hpc_ptr->slots[index].ctl_index;
+ tmp_slot->number = hpc_ptr->slots[index].slot_num;
+ tmp_slot->hotplug_slot = hp_slot_ptr;
+
+ hp_slot_ptr->private = tmp_slot;
+
+ rc = fillslotinfo(hp_slot_ptr);
+ if (rc)
+ goto error;
+
+ rc = ibmphp_init_devno((struct slot **) &hp_slot_ptr->private);
+ if (rc)
+ goto error;
+ hp_slot_ptr->ops = &ibmphp_hotplug_slot_ops;
+
+ // end of registering ibm slot with hotplug core
+
+ list_add(&((struct slot *)(hp_slot_ptr->private))->ibm_slot_list, &ibmphp_slot_head);
+ }
+
+ print_bus_info();
+ list_add(&hpc_ptr->ebda_hpc_list, &ebda_hpc_head);
+
+ } /* each hpc */
+
+ list_for_each_entry(tmp_slot, &ibmphp_slot_head, ibm_slot_list) {
+ snprintf(name, SLOT_NAME_SIZE, "%s", create_file_name(tmp_slot));
+ pci_hp_register(tmp_slot->hotplug_slot,
+ pci_find_bus(0, tmp_slot->bus), tmp_slot->device, name);
+ }
+
+ print_ebda_hpc();
+ print_ibm_slot();
+ return 0;
+
+error:
+ kfree(hp_slot_ptr->private);
+error_no_slot:
+ kfree(hp_slot_ptr->info);
+error_no_hp_info:
+ kfree(hp_slot_ptr);
+error_no_hp_slot:
+ free_ebda_hpc(hpc_ptr);
+error_no_hpc:
+ iounmap(io_mem);
+ return rc;
+}
+
+/*
+ * map info (bus, devfun, start addr, end addr..) of i/o, memory,
+ * pfm from the physical addr to a list of resource.
+ */
+static int __init ebda_rsrc_rsrc(void)
+{
+ u16 addr;
+ short rsrc;
+ u8 type, rsrc_type;
+ struct ebda_pci_rsrc *rsrc_ptr;
+
+ addr = rsrc_list_ptr->phys_addr;
+ debug("now entering rsrc land\n");
+ debug("offset of rsrc: %x\n", rsrc_list_ptr->phys_addr);
+
+ for (rsrc = 0; rsrc < rsrc_list_ptr->num_entries; rsrc++) {
+ type = readb(io_mem + addr);
+
+ addr += 1;
+ rsrc_type = type & EBDA_RSRC_TYPE_MASK;
+
+ if (rsrc_type == EBDA_IO_RSRC_TYPE) {
+ rsrc_ptr = alloc_ebda_pci_rsrc();
+ if (!rsrc_ptr) {
+ iounmap(io_mem);
+ return -ENOMEM;
+ }
+ rsrc_ptr->rsrc_type = type;
+
+ rsrc_ptr->bus_num = readb(io_mem + addr);
+ rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
+ rsrc_ptr->start_addr = readw(io_mem + addr + 2);
+ rsrc_ptr->end_addr = readw(io_mem + addr + 4);
+ addr += 6;
+
+ debug("rsrc from io type ----\n");
+ debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
+ rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
+
+ list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
+ }
+
+ if (rsrc_type == EBDA_MEM_RSRC_TYPE || rsrc_type == EBDA_PFM_RSRC_TYPE) {
+ rsrc_ptr = alloc_ebda_pci_rsrc();
+ if (!rsrc_ptr) {
+ iounmap(io_mem);
+ return -ENOMEM;
+ }
+ rsrc_ptr->rsrc_type = type;
+
+ rsrc_ptr->bus_num = readb(io_mem + addr);
+ rsrc_ptr->dev_fun = readb(io_mem + addr + 1);
+ rsrc_ptr->start_addr = readl(io_mem + addr + 2);
+ rsrc_ptr->end_addr = readl(io_mem + addr + 6);
+ addr += 10;
+
+ debug("rsrc from mem or pfm ---\n");
+ debug("rsrc type: %x bus#: %x dev_func: %x start addr: %x end addr: %x\n",
+ rsrc_ptr->rsrc_type, rsrc_ptr->bus_num, rsrc_ptr->dev_fun, rsrc_ptr->start_addr, rsrc_ptr->end_addr);
+
+ list_add(&rsrc_ptr->ebda_pci_rsrc_list, &ibmphp_ebda_pci_rsrc_head);
+ }
+ }
+ kfree(rsrc_list_ptr);
+ rsrc_list_ptr = NULL;
+ print_ebda_pci_rsrc();
+ return 0;
+}
+
+u16 ibmphp_get_total_controllers(void)
+{
+ return hpc_list_ptr->num_ctlrs;
+}
+
+struct slot *ibmphp_get_slot_from_physical_num(u8 physical_num)
+{
+ struct slot *slot;
+
+ list_for_each_entry(slot, &ibmphp_slot_head, ibm_slot_list) {
+ if (slot->number == physical_num)
+ return slot;
+ }
+ return NULL;
+}
+
+/* To find:
+ * - the smallest slot number
+ * - the largest slot number
+ * - the total number of the slots based on each bus
+ * (if only one slot per bus slot_min = slot_max )
+ */
+struct bus_info *ibmphp_find_same_bus_num(u32 num)
+{
+ struct bus_info *ptr;
+
+ list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
+ if (ptr->busno == num)
+ return ptr;
+ }
+ return NULL;
+}
+
+/* Finding relative bus number, in order to map corresponding
+ * bus register
+ */
+int ibmphp_get_bus_index(u8 num)
+{
+ struct bus_info *ptr;
+
+ list_for_each_entry(ptr, &bus_info_head, bus_info_list) {
+ if (ptr->busno == num)
+ return ptr->index;
+ }
+ return -ENODEV;
+}
+
+void ibmphp_free_bus_info_queue(void)
+{
+ struct bus_info *bus_info, *next;
+
+ list_for_each_entry_safe(bus_info, next, &bus_info_head,
+ bus_info_list) {
+ kfree (bus_info);
+ }
+}
+
+void ibmphp_free_ebda_hpc_queue(void)
+{
+ struct controller *controller = NULL, *next;
+ int pci_flag = 0;
+
+ list_for_each_entry_safe(controller, next, &ebda_hpc_head,
+ ebda_hpc_list) {
+ if (controller->ctlr_type == 0)
+ release_region(controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
+ else if ((controller->ctlr_type == 1) && (!pci_flag)) {
+ ++pci_flag;
+ pci_unregister_driver(&ibmphp_driver);
+ }
+ free_ebda_hpc(controller);
+ }
+}
+
+void ibmphp_free_ebda_pci_rsrc_queue(void)
+{
+ struct ebda_pci_rsrc *resource, *next;
+
+ list_for_each_entry_safe(resource, next, &ibmphp_ebda_pci_rsrc_head,
+ ebda_pci_rsrc_list) {
+ kfree (resource);
+ resource = NULL;
+ }
+}
+
+static const struct pci_device_id id_table[] = {
+ {
+ .vendor = PCI_VENDOR_ID_IBM,
+ .device = HPC_DEVICE_ID,
+ .subvendor = PCI_VENDOR_ID_IBM,
+ .subdevice = HPC_SUBSYSTEM_ID,
+ .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
+ }, {}
+};
+
+MODULE_DEVICE_TABLE(pci, id_table);
+
+static int ibmphp_probe(struct pci_dev *, const struct pci_device_id *);
+static struct pci_driver ibmphp_driver = {
+ .name = "ibmphp",
+ .id_table = id_table,
+ .probe = ibmphp_probe,
+};
+
+int ibmphp_register_pci(void)
+{
+ struct controller *ctrl;
+ int rc = 0;
+
+ list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
+ if (ctrl->ctlr_type == 1) {
+ rc = pci_register_driver(&ibmphp_driver);
+ break;
+ }
+ }
+ return rc;
+}
+static int ibmphp_probe(struct pci_dev *dev, const struct pci_device_id *ids)
+{
+ struct controller *ctrl;
+
+ debug("inside ibmphp_probe\n");
+
+ list_for_each_entry(ctrl, &ebda_hpc_head, ebda_hpc_list) {
+ if (ctrl->ctlr_type == 1) {
+ if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
+ ctrl->ctrl_dev = dev;
+ debug("found device!!!\n");
+ debug("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
+ return 0;
+ }
+ }
+ }
+ return -ENODEV;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 07:28:45 +0000