diff options
Diffstat (limited to 'drivers/pci/hotplug/shpchprm_acpi.c')
| -rw-r--r-- | drivers/pci/hotplug/shpchprm_acpi.c | 794 |
1 files changed, 62 insertions, 732 deletions
diff --git a/drivers/pci/hotplug/shpchprm_acpi.c b/drivers/pci/hotplug/shpchprm_acpi.c index 3d2f9c5269c..3be518c7d47 100644 --- a/drivers/pci/hotplug/shpchprm_acpi.c +++ b/drivers/pci/hotplug/shpchprm_acpi.c @@ -38,62 +38,11 @@ #include <acpi/acpi_bus.h> #include <acpi/actypes.h> #include "shpchp.h" -#include "shpchprm.h" - -#define PCI_MAX_BUS 0x100 -#define ACPI_STA_DEVICE_PRESENT 0x01 #define METHOD_NAME__SUN "_SUN" #define METHOD_NAME__HPP "_HPP" #define METHOD_NAME_OSHP "OSHP" -#define PHP_RES_BUS 0xA0 -#define PHP_RES_IO 0xA1 -#define PHP_RES_MEM 0xA2 -#define PHP_RES_PMEM 0xA3 - -#define BRIDGE_TYPE_P2P 0x00 -#define BRIDGE_TYPE_HOST 0x01 - -/* this should go to drivers/acpi/include/ */ -struct acpi__hpp { - u8 cache_line_size; - u8 latency_timer; - u8 enable_serr; - u8 enable_perr; -}; - -struct acpi_php_slot { - struct acpi_php_slot *next; - struct acpi_bridge *bridge; - acpi_handle handle; - int seg; - int bus; - int dev; - int fun; - u32 sun; - void *slot_ops; /* _STA, _EJx, etc */ - struct slot *slot; -}; /* per func */ - -struct acpi_bridge { - struct acpi_bridge *parent; - struct acpi_bridge *next; - struct acpi_bridge *child; - acpi_handle handle; - int seg; - int pbus; /* pdev->bus->number */ - int pdevice; /* PCI_SLOT(pdev->devfn) */ - int pfunction; /* PCI_DEVFN(pdev->devfn) */ - int bus; /* pdev->subordinate->number */ - struct acpi__hpp *_hpp; - struct acpi_php_slot *slots; - int scanned; - int type; -}; - -static struct acpi_bridge *acpi_bridges_head; - static u8 * acpi_path_name( acpi_handle handle) { acpi_status status; @@ -109,82 +58,43 @@ static u8 * acpi_path_name( acpi_handle handle) return path_name; } -static void acpi_get__hpp ( struct acpi_bridge *ab); -static void acpi_run_oshp ( struct acpi_bridge *ab); - -static int acpi_add_slot_to_php_slots( - struct acpi_bridge *ab, - int bus_num, - acpi_handle handle, - u32 adr, - u32 sun - ) -{ - struct acpi_php_slot *aps; - static long samesun = -1; - - aps = (struct acpi_php_slot *) kmalloc (sizeof(struct acpi_php_slot), GFP_KERNEL); - if (!aps) { - err ("acpi_shpchprm: alloc for aps fail\n"); - return -1; - } - memset(aps, 0, sizeof(struct acpi_php_slot)); - - aps->handle = handle; - aps->bus = bus_num; - aps->dev = (adr >> 16) & 0xffff; - aps->fun = adr & 0xffff; - aps->sun = sun; - - aps->next = ab->slots; /* cling to the bridge */ - aps->bridge = ab; - ab->slots = aps; - - ab->scanned += 1; - if (!ab->_hpp) - acpi_get__hpp(ab); - - acpi_run_oshp(ab); - - if (sun != samesun) { - info("acpi_shpchprm: Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", aps->sun, ab->seg, - aps->bus, aps->dev, aps->fun); - samesun = sun; - } - return 0; -} - -static void acpi_get__hpp ( struct acpi_bridge *ab) +static acpi_status +acpi_run_hpp(acpi_handle handle, struct hotplug_params *hpp) { acpi_status status; u8 nui[4]; struct acpi_buffer ret_buf = { 0, NULL}; union acpi_object *ext_obj, *package; - u8 *path_name = acpi_path_name(ab->handle); + u8 *path_name = acpi_path_name(handle); int i, len = 0; /* get _hpp */ - status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf); + status = acpi_evaluate_object(handle, METHOD_NAME__HPP, NULL, &ret_buf); switch (status) { case AE_BUFFER_OVERFLOW: ret_buf.pointer = kmalloc (ret_buf.length, GFP_KERNEL); if (!ret_buf.pointer) { - err ("acpi_shpchprm:%s alloc for _HPP fail\n", path_name); - return; + err ("%s:%s alloc for _HPP fail\n", __FUNCTION__, + path_name); + return AE_NO_MEMORY; } - status = acpi_evaluate_object(ab->handle, METHOD_NAME__HPP, NULL, &ret_buf); + status = acpi_evaluate_object(handle, METHOD_NAME__HPP, + NULL, &ret_buf); if (ACPI_SUCCESS(status)) break; default: if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s _HPP fail=0x%x\n", path_name, status); - return; + dbg("%s:%s _HPP fail=0x%x\n", __FUNCTION__, + path_name, status); + return status; } } ext_obj = (union acpi_object *) ret_buf.pointer; if (ext_obj->type != ACPI_TYPE_PACKAGE) { - err ("acpi_shpchprm:%s _HPP obj not a package\n", path_name); + err ("%s:%s _HPP obj not a package\n", __FUNCTION__, + path_name); + status = AE_ERROR; goto free_and_return; } @@ -197,553 +107,41 @@ static void acpi_get__hpp ( struct acpi_bridge *ab) nui[i] = (u8)ext_obj->integer.value; break; default: - err ("acpi_shpchprm:%s _HPP obj type incorrect\n", path_name); + err ("%s:%s _HPP obj type incorrect\n", __FUNCTION__, + path_name); + status = AE_ERROR; goto free_and_return; } } - ab->_hpp = kmalloc (sizeof (struct acpi__hpp), GFP_KERNEL); - if (!ab->_hpp) { - err ("acpi_shpchprm:%s alloc for _HPP failed\n", path_name); - goto free_and_return; - } - memset(ab->_hpp, 0, sizeof(struct acpi__hpp)); - - ab->_hpp->cache_line_size = nui[0]; - ab->_hpp->latency_timer = nui[1]; - ab->_hpp->enable_serr = nui[2]; - ab->_hpp->enable_perr = nui[3]; + hpp->cache_line_size = nui[0]; + hpp->latency_timer = nui[1]; + hpp->enable_serr = nui[2]; + hpp->enable_perr = nui[3]; - dbg(" _HPP: cache_line_size=0x%x\n", ab->_hpp->cache_line_size); - dbg(" _HPP: latency timer =0x%x\n", ab->_hpp->latency_timer); - dbg(" _HPP: enable SERR =0x%x\n", ab->_hpp->enable_serr); - dbg(" _HPP: enable PERR =0x%x\n", ab->_hpp->enable_perr); + dbg(" _HPP: cache_line_size=0x%x\n", hpp->cache_line_size); + dbg(" _HPP: latency timer =0x%x\n", hpp->latency_timer); + dbg(" _HPP: enable SERR =0x%x\n", hpp->enable_serr); + dbg(" _HPP: enable PERR =0x%x\n", hpp->enable_perr); free_and_return: kfree(ret_buf.pointer); + return status; } -static void acpi_run_oshp ( struct acpi_bridge *ab) -{ - acpi_status status; - u8 *path_name = acpi_path_name(ab->handle); - - /* run OSHP */ - status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, NULL); - if (ACPI_FAILURE(status)) { - err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status); - } else - dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status); - return; -} - -/* find acpi_bridge downword from ab. */ -static struct acpi_bridge * -find_acpi_bridge_by_bus( - struct acpi_bridge *ab, - int seg, - int bus /* pdev->subordinate->number */ - ) -{ - struct acpi_bridge *lab = NULL; - - if (!ab) - return NULL; - - if ((ab->bus == bus) && (ab->seg == seg)) - return ab; - - if (ab->child) - lab = find_acpi_bridge_by_bus(ab->child, seg, bus); - - if (!lab) - if (ab->next) - lab = find_acpi_bridge_by_bus(ab->next, seg, bus); - - return lab; -} - -/* - * Build a device tree of ACPI PCI Bridges - */ -static void shpchprm_acpi_register_a_bridge ( - struct acpi_bridge **head, - struct acpi_bridge *pab, /* parent bridge to which child bridge is added */ - struct acpi_bridge *cab /* child bridge to add */ - ) -{ - struct acpi_bridge *lpab; - struct acpi_bridge *lcab; - - lpab = find_acpi_bridge_by_bus(*head, pab->seg, pab->bus); - if (!lpab) { - if (!(pab->type & BRIDGE_TYPE_HOST)) - warn("PCI parent bridge s:b(%x:%x) not in list.\n", pab->seg, pab->bus); - pab->next = *head; - *head = pab; - lpab = pab; - } - - if ((cab->type & BRIDGE_TYPE_HOST) && (pab == cab)) - return; - - lcab = find_acpi_bridge_by_bus(*head, cab->seg, cab->bus); - if (lcab) { - if ((pab->bus != lcab->parent->bus) || (lcab->bus != cab->bus)) - err("PCI child bridge s:b(%x:%x) in list with diff parent.\n", cab->seg, cab->bus); - return; - } else - lcab = cab; - - lcab->parent = lpab; - lcab->next = lpab->child; - lpab->child = lcab; -} - -static acpi_status shpchprm_acpi_build_php_slots_callback( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) +static void acpi_run_oshp(acpi_handle handle) { - ulong bus_num; - ulong seg_num; - ulong sun, adr; - ulong padr = 0; - acpi_handle phandle = NULL; - struct acpi_bridge *pab = (struct acpi_bridge *)context; - struct acpi_bridge *lab; acpi_status status; u8 *path_name = acpi_path_name(handle); - /* get _SUN */ - status = acpi_evaluate_integer(handle, METHOD_NAME__SUN, NULL, &sun); - switch(status) { - case AE_NOT_FOUND: - return AE_OK; - default: - if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s _SUN fail=0x%x\n", path_name, status); - return status; - } - } - - /* get _ADR. _ADR must exist if _SUN exists */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status); - return status; - } - - dbg("acpi_shpchprm:%s sun=0x%08x adr=0x%08x\n", path_name, (u32)sun, (u32)adr); - - status = acpi_get_parent(handle, &phandle); + /* run OSHP */ + status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL); if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s get_parent fail=0x%x\n", path_name, status); - return (status); - } - - bus_num = pab->bus; - seg_num = pab->seg; - - if (pab->bus == bus_num) { - lab = pab; + err("%s:%s OSHP fails=0x%x\n", __FUNCTION__, path_name, + status); } else { - dbg("WARN: pab is not parent\n"); - lab = find_acpi_bridge_by_bus(pab, seg_num, bus_num); - if (!lab) { - dbg("acpi_shpchprm: alloc new P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun); - lab = (struct acpi_bridge *)kmalloc(sizeof(struct acpi_bridge), GFP_KERNEL); - if (!lab) { - err("acpi_shpchprm: alloc for ab fail\n"); - return AE_NO_MEMORY; - } - memset(lab, 0, sizeof(struct acpi_bridge)); - - lab->handle = phandle; - lab->pbus = pab->bus; - lab->pdevice = (int)(padr >> 16) & 0xffff; - lab->pfunction = (int)(padr & 0xffff); - lab->bus = (int)bus_num; - lab->scanned = 0; - lab->type = BRIDGE_TYPE_P2P; - - shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, lab); - } else - dbg("acpi_shpchprm: found P2P bridge(%x) for sun(%08x)\n", (u32)bus_num, (u32)sun); - } - - acpi_add_slot_to_php_slots(lab, (int)bus_num, handle, (u32)adr, (u32)sun); - return (status); -} - -static int shpchprm_acpi_build_php_slots( - struct acpi_bridge *ab, - u32 depth - ) -{ - acpi_status status; - u8 *path_name = acpi_path_name(ab->handle); - - /* Walk down this pci bridge to get _SUNs if any behind P2P */ - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - ab->handle, - depth, - shpchprm_acpi_build_php_slots_callback, - ab, - NULL ); - if (ACPI_FAILURE(status)) { - dbg("acpi_shpchprm:%s walk for _SUN on pci bridge seg:bus(%x:%x) fail=0x%x\n", path_name, ab->seg, ab->bus, status); - return -1; - } - - return 0; -} - -static void build_a_bridge( - struct acpi_bridge *pab, - struct acpi_bridge *ab - ) -{ - u8 *path_name = acpi_path_name(ab->handle); - - shpchprm_acpi_register_a_bridge (&acpi_bridges_head, pab, ab); - - switch (ab->type) { - case BRIDGE_TYPE_HOST: - dbg("acpi_shpchprm: Registered PCI HOST Bridge(%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n", - ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name); - break; - case BRIDGE_TYPE_P2P: - dbg("acpi_shpchprm: Registered PCI P2P Bridge(%02x-%02x) on s:b:d:f(%02x:%02x:%02x:%02x) [%s]\n", - ab->pbus, ab->bus, ab->seg, ab->pbus, ab->pdevice, ab->pfunction, path_name); - break; - }; - - /* build any immediate PHP slots under this pci bridge */ - shpchprm_acpi_build_php_slots(ab, 1); -} - -static struct acpi_bridge * add_p2p_bridge( - acpi_handle handle, - struct acpi_bridge *pab, /* parent */ - ulong adr - ) -{ - struct acpi_bridge *ab; - struct pci_dev *pdev; - ulong devnum, funcnum; - u8 *path_name = acpi_path_name(handle); - - ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL); - if (!ab) { - err("acpi_shpchprm: alloc for ab fail\n"); - return NULL; - } - memset(ab, 0, sizeof(struct acpi_bridge)); - - devnum = (adr >> 16) & 0xffff; - funcnum = adr & 0xffff; - - pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum)); - if (!pdev || !pdev->subordinate) { - err("acpi_shpchprm:%s is not a P2P Bridge\n", path_name); - kfree(ab); - return NULL; - } - - ab->handle = handle; - ab->seg = pab->seg; - ab->pbus = pab->bus; /* or pdev->bus->number */ - ab->pdevice = devnum; /* or PCI_SLOT(pdev->devfn) */ - ab->pfunction = funcnum; /* or PCI_FUNC(pdev->devfn) */ - ab->bus = pdev->subordinate->number; - ab->scanned = 0; - ab->type = BRIDGE_TYPE_P2P; - - dbg("acpi_shpchprm: P2P(%x-%x) on pci=b:d:f(%x:%x:%x) acpi=b:d:f(%x:%x:%x) [%s]\n", - pab->bus, ab->bus, pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), - pab->bus, (u32)devnum, (u32)funcnum, path_name); - - build_a_bridge(pab, ab); - - return ab; -} - -static acpi_status scan_p2p_bridge( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) -{ - struct acpi_bridge *pab = (struct acpi_bridge *)context; - struct acpi_bridge *ab; - acpi_status status; - ulong adr = 0; - u8 *path_name = acpi_path_name(handle); - ulong devnum, funcnum; - struct pci_dev *pdev; - - /* get device, function */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - if (status != AE_NOT_FOUND) - err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status); - return AE_OK; + dbg("%s:%s OSHP passes\n", __FUNCTION__, path_name); } - - devnum = (adr >> 16) & 0xffff; - funcnum = adr & 0xffff; - - pdev = pci_find_slot(pab->bus, PCI_DEVFN(devnum, funcnum)); - if (!pdev) - return AE_OK; - if (!pdev->subordinate) - return AE_OK; - - ab = add_p2p_bridge(handle, pab, adr); - if (ab) { - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - handle, - (u32)1, - scan_p2p_bridge, - ab, - NULL); - if (ACPI_FAILURE(status)) - dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status); - } - - return AE_OK; -} - -static struct acpi_bridge * add_host_bridge( - acpi_handle handle, - ulong segnum, - ulong busnum - ) -{ - ulong adr = 0; - acpi_status status; - struct acpi_bridge *ab; - u8 *path_name = acpi_path_name(handle); - - /* get device, function: host br adr is always 0000 though. */ - status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &adr); - if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s _ADR fail=0x%x\n", path_name, status); - return NULL; - } - dbg("acpi_shpchprm: ROOT PCI seg(0x%x)bus(0x%x)dev(0x%x)func(0x%x) [%s]\n", (u32)segnum, (u32)busnum, - (u32)(adr >> 16) & 0xffff, (u32)adr & 0xffff, path_name); - - ab = (struct acpi_bridge *) kmalloc (sizeof(struct acpi_bridge), GFP_KERNEL); - if (!ab) { - err("acpi_shpchprm: alloc for ab fail\n"); - return NULL; - } - memset(ab, 0, sizeof(struct acpi_bridge)); - - ab->handle = handle; - ab->seg = (int)segnum; - ab->bus = ab->pbus = (int)busnum; - ab->pdevice = (int)(adr >> 16) & 0xffff; - ab->pfunction = (int)(adr & 0xffff); - ab->scanned = 0; - ab->type = BRIDGE_TYPE_HOST; - - build_a_bridge(ab, ab); - - return ab; -} - -static acpi_status acpi_scan_from_root_pci_callback ( - acpi_handle handle, - u32 Level, - void *context, - void **retval - ) -{ - ulong segnum = 0; - ulong busnum = 0; - acpi_status status; - struct acpi_bridge *ab; - u8 *path_name = acpi_path_name(handle); - - /* get bus number of this pci root bridge */ - status = acpi_evaluate_integer(handle, METHOD_NAME__SEG, NULL, &segnum); - if (ACPI_FAILURE(status)) { - if (status != AE_NOT_FOUND) { - err("acpi_shpchprm:%s evaluate _SEG fail=0x%x\n", path_name, status); - return status; - } - segnum = 0; - } - - /* get bus number of this pci root bridge */ - status = acpi_evaluate_integer(handle, METHOD_NAME__BBN, NULL, &busnum); - if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:%s evaluate _BBN fail=0x%x\n", path_name, status); - return (status); - } - - ab = add_host_bridge(handle, segnum, busnum); - if (ab) { - status = acpi_walk_namespace ( ACPI_TYPE_DEVICE, - handle, - 1, - scan_p2p_bridge, - ab, - NULL); - if (ACPI_FAILURE(status)) - dbg("acpi_shpchprm:%s find_p2p fail=0x%x\n", path_name, status); - } - - return AE_OK; -} - -static int shpchprm_acpi_scan_pci (void) -{ - acpi_status status; - - /* - * TBD: traverse LDM device tree with the help of - * unified ACPI augmented for php device population. - */ - status = acpi_get_devices ( PCI_ROOT_HID_STRING, - acpi_scan_from_root_pci_callback, - NULL, - NULL ); - if (ACPI_FAILURE(status)) { - err("acpi_shpchprm:get_device PCI ROOT HID fail=0x%x\n", status); - return -1; - } - - return 0; -} - -int shpchprm_init(enum php_ctlr_type ctlr_type) -{ - int rc; - - if (ctlr_type != PCI) - return -ENODEV; - - dbg("shpchprm ACPI init <enter>\n"); - acpi_bridges_head = NULL; - - /* construct PCI bus:device tree of acpi_handles */ - rc = shpchprm_acpi_scan_pci(); - if (rc) - return rc; - - dbg("shpchprm ACPI init %s\n", (rc)?"fail":"success"); - return rc; -} - -static void free_a_slot(struct acpi_php_slot *aps) -{ - dbg(" free a php func of slot(0x%02x) on PCI b:d:f=0x%02x:%02x:%02x\n", aps->sun, aps->bus, aps->dev, aps->fun); - - kfree(aps); -} - -static void free_a_bridge( struct acpi_bridge *ab) -{ - struct acpi_php_slot *aps, *next; - - switch (ab->type) { - case BRIDGE_TYPE_HOST: - dbg("Free ACPI PCI HOST Bridge(%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n", - ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction); - break; - case BRIDGE_TYPE_P2P: - dbg("Free ACPI PCI P2P Bridge(%x-%x) [%s] on s:b:d:f(%x:%x:%x:%x)\n", - ab->pbus, ab->bus, acpi_path_name(ab->handle), ab->seg, ab->pbus, ab->pdevice, ab->pfunction); - break; - }; - - /* free slots first */ - for (aps = ab->slots; aps; aps = next) { - next = aps->next; - free_a_slot(aps); - } - - kfree(ab); -} - -static void shpchprm_free_bridges ( struct acpi_bridge *ab) -{ - if (!ab) - return; - - if (ab->child) - shpchprm_free_bridges (ab->child); - - if (ab->next) - shpchprm_free_bridges (ab->next); - - free_a_bridge(ab); -} - -void shpchprm_cleanup(void) -{ - shpchprm_free_bridges (acpi_bridges_head); -} - -static int get_number_of_slots ( - struct acpi_bridge *ab, - int selfonly - ) -{ - struct acpi_php_slot *aps; - int prev_slot = -1; - int slot_num = 0; - - for ( aps = ab->slots; aps; aps = aps->next) - if (aps->dev != prev_slot) { - prev_slot = aps->dev; - slot_num++; - } - - if (ab->child) - slot_num += get_number_of_slots (ab->child, 0); - - if (selfonly) - return slot_num; - - if (ab->next) - slot_num += get_number_of_slots (ab->next, 0); - - return slot_num; -} - -static struct acpi_php_slot * get_acpi_slot ( - struct acpi_bridge *ab, - u32 sun - ) -{ - struct acpi_php_slot *aps = NULL; - - for ( aps = ab->slots; aps; aps = aps->next) - if (aps->sun == sun) - return aps; - - if (!aps && ab->child) { - aps = (struct acpi_php_slot *)get_acpi_slot (ab->child, sun); - if (aps) - return aps; - } - - if (!aps && ab->next) { - aps = (struct acpi_php_slot *)get_acpi_slot (ab->next, sun); - if (aps) - return aps; - } - - return aps; - } int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum) @@ -755,108 +153,40 @@ int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busn return 0; } -int shpchprm_set_hpp( - struct controller *ctrl, - struct pci_func *func, - u8 card_type - ) +void get_hp_hw_control_from_firmware(struct pci_dev *dev) { - struct acpi_bridge *ab; - struct pci_bus lpci_bus, *pci_bus; - int rc = 0; - unsigned int devfn; - u8 cls= 0x08; /* default cache line size */ - u8 lt = 0x40; /* default latency timer */ - u8 ep = 0; - u8 es = 0; - - memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus)); - pci_bus = &lpci_bus; - pci_bus->number = func->bus; - devfn = PCI_DEVFN(func->device, func->function); - - ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus); - - if (ab) { - if (ab->_hpp) { - lt = (u8)ab->_hpp->latency_timer; - cls = (u8)ab->_hpp->cache_line_size; - ep = (u8)ab->_hpp->enable_perr; - es = (u8)ab->_hpp->enable_serr; - } else - dbg("_hpp: no _hpp for B/D/F=%#x/%#x/%#x. use default value\n", func->bus, func->device, func->function); - } else - dbg("_hpp: no acpi bridge for B/D/F = %#x/%#x/%#x. use default value\n", func->bus, func->device, func->function); - - - if (card_type == PCI_HEADER_TYPE_BRIDGE) { - /* set subordinate Latency Timer */ - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, lt); - } - - /* set base Latency Timer */ - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, lt); - dbg(" set latency timer =0x%02x: %x\n", lt, rc); - - rc |= pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, cls); - dbg(" set cache_line_size=0x%02x: %x\n", cls, rc); - - return rc; + /* + * OSHP is an optional ACPI firmware control method. If present, + * we need to run it to inform BIOS that we will control SHPC + * hardware from now on. + */ + acpi_handle handle = DEVICE_ACPI_HANDLE(&(dev->dev)); + if (!handle) + return; + acpi_run_oshp(handle); } -void shpchprm_enable_card( - struct controller *ctrl, - struct pci_func *func, - u8 card_type) +void get_hp_params_from_firmware(struct pci_dev *dev, + struct hotplug_params *hpp) { - u16 command, cmd, bcommand, bcmd; - struct pci_bus lpci_bus, *pci_bus; - struct acpi_bridge *ab; - unsigned int devfn; - int rc; - - memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus)); - pci_bus = &lpci_bus; - pci_bus->number = func->bus; - devfn = PCI_DEVFN(func->device, func->function); - - rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command); - - if (card_type == PCI_HEADER_TYPE_BRIDGE) { - rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand); - } - - cmd = command = command | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE - | PCI_COMMAND_IO | PCI_COMMAND_MEMORY; - bcmd = bcommand = bcommand | PCI_BRIDGE_CTL_NO_ISA; + acpi_status status = AE_NOT_FOUND; + struct pci_dev *pdev = dev; - ab = find_acpi_bridge_by_bus(acpi_bridges_head, ctrl->seg, ctrl->slot_bus); - if (ab) { - if (ab->_hpp) { - if (ab->_hpp->enable_perr) { - command |= PCI_COMMAND_PARITY; - bcommand |= PCI_BRIDGE_CTL_PARITY; - } else { - command &= ~PCI_COMMAND_PARITY; - bcommand &= ~PCI_BRIDGE_CTL_PARITY; - } - if (ab->_hpp->enable_serr) { - command |= PCI_COMMAND_SERR; - bcommand |= PCI_BRIDGE_CTL_SERR; - } else { - command &= ~PCI_COMMAND_SERR; - bcommand &= ~PCI_BRIDGE_CTL_SERR; - } - } else - dbg("no _hpp for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function); - } else - dbg("no acpi bridge for B/D/F = %#x/%#x/%#x.\n", func->bus, func->device, func->function); - - if (command != cmd) { - rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command); - } - if ((card_type == PCI_HEADER_TYPE_BRIDGE) && (bcommand != bcmd)) { - rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand); + /* + * _HPP settings apply to all child buses, until another _HPP is + * encountered. If we don't find an _HPP for the input pci dev, + * look for it in the parent device scope since that would apply to + * this pci dev. If we don't find any _HPP, use hardcoded defaults + */ + while (pdev && (ACPI_FAILURE(status))) { + acpi_handle handle = DEVICE_ACPI_HANDLE(&(pdev->dev)); + if (!handle) + break; + status = acpi_run_hpp(handle, hpp); + if (!(pdev->bus->parent)) + break; + /* Check if a parent object supports _HPP */ + pdev = pdev->bus->parent->self; } } |