[deliverable/linux.git] / arch / s390 / pci / pci_clp.c

/*
 * Copyright IBM Corp. 2012
 *
 * Author(s):
 *   Jan Glauber <jang@linux.vnet.ibm.com>
 */

#define KMSG_COMPONENT "zpci"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <asm/pci_debug.h>
#include <asm/pci_clp.h>

static inline void zpci_err_clp(unsigned int rsp, int rc)
{
	struct {
		unsigned int rsp;
		int rc;
	} __packed data = {rsp, rc};

	zpci_err_hex(&data, sizeof(data));
}

/*
 * Call Logical Processor
 * Retry logic is handled by the caller.
 */
static inline u8 clp_instr(void *data)
{
	struct { u8 _[CLP_BLK_SIZE]; } *req = data;
	u64 ignored;
	u8 cc;

	asm volatile (
		"	.insn	rrf,0xb9a00000,%[ign],%[req],0x0,0x2\n"
		"	ipm	%[cc]\n"
		"	srl	%[cc],28\n"
		: [cc] "=d" (cc), [ign] "=d" (ignored), "+m" (*req)
		: [req] "a" (req)
		: "cc");
	return cc;
}

static void *clp_alloc_block(gfp_t gfp_mask)
{
	return (void *) __get_free_pages(gfp_mask, get_order(CLP_BLK_SIZE));
}

static void clp_free_block(void *ptr)
{
	free_pages((unsigned long) ptr, get_order(CLP_BLK_SIZE));
}

static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
				      struct clp_rsp_query_pci_grp *response)
{
	zdev->tlb_refresh = response->refresh;
	zdev->dma_mask = response->dasm;
	zdev->msi_addr = response->msia;
	zdev->fmb_update = response->mui;

	switch (response->version) {
	case 1:
		zdev->max_bus_speed = PCIE_SPEED_5_0GT;
		break;
	default:
		zdev->max_bus_speed = PCI_SPEED_UNKNOWN;
		break;
	}
}

static int clp_query_pci_fngrp(struct zpci_dev *zdev, u8 pfgid)
{
	struct clp_req_rsp_query_pci_grp *rrb;
	int rc;

	rrb = clp_alloc_block(GFP_KERNEL);
	if (!rrb)
		return -ENOMEM;

	memset(rrb, 0, sizeof(*rrb));
	rrb->request.hdr.len = sizeof(rrb->request);
	rrb->request.hdr.cmd = CLP_QUERY_PCI_FNGRP;
	rrb->response.hdr.len = sizeof(rrb->response);
	rrb->request.pfgid = pfgid;

	rc = clp_instr(rrb);
	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
		clp_store_query_pci_fngrp(zdev, &rrb->response);
	else {
		zpci_err("Q PCI FGRP:\n");
		zpci_err_clp(rrb->response.hdr.rsp, rc);
		rc = -EIO;
	}
	clp_free_block(rrb);
	return rc;
}

static int clp_store_query_pci_fn(struct zpci_dev *zdev,
				  struct clp_rsp_query_pci *response)
{
	int i;

	for (i = 0; i < PCI_BAR_COUNT; i++) {
		zdev->bars[i].val = le32_to_cpu(response->bar[i]);
		zdev->bars[i].size = response->bar_size[i];
	}
	zdev->start_dma = response->sdma;
	zdev->end_dma = response->edma;
	zdev->pchid = response->pchid;
	zdev->pfgid = response->pfgid;
	zdev->pft = response->pft;
	zdev->vfn = response->vfn;
	zdev->uid = response->uid;

	memcpy(zdev->pfip, response->pfip, sizeof(zdev->pfip));
	if (response->util_str_avail) {
		memcpy(zdev->util_str, response->util_str,
		       sizeof(zdev->util_str));
	}

	return 0;
}

static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
{
	struct clp_req_rsp_query_pci *rrb;
	int rc;

	rrb = clp_alloc_block(GFP_KERNEL);
	if (!rrb)
		return -ENOMEM;

	memset(rrb, 0, sizeof(*rrb));
	rrb->request.hdr.len = sizeof(rrb->request);
	rrb->request.hdr.cmd = CLP_QUERY_PCI_FN;
	rrb->response.hdr.len = sizeof(rrb->response);
	rrb->request.fh = fh;

	rc = clp_instr(rrb);
	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK) {
		rc = clp_store_query_pci_fn(zdev, &rrb->response);
		if (rc)
			goto out;
		if (rrb->response.pfgid)
			rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
	} else {
		zpci_err("Q PCI FN:\n");
		zpci_err_clp(rrb->response.hdr.rsp, rc);
		rc = -EIO;
	}
out:
	clp_free_block(rrb);
	return rc;
}

int clp_add_pci_device(u32 fid, u32 fh, int configured)
{
	struct zpci_dev *zdev;
	int rc;

	zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, configured);
	zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
	if (!zdev)
		return -ENOMEM;

	zdev->fh = fh;
	zdev->fid = fid;

	/* Query function properties and update zdev */
	rc = clp_query_pci_fn(zdev, fh);
	if (rc)
		goto error;

	if (configured)
		zdev->state = ZPCI_FN_STATE_CONFIGURED;
	else
		zdev->state = ZPCI_FN_STATE_STANDBY;

	rc = zpci_create_device(zdev);
	if (rc)
		goto error;
	return 0;

error:
	kfree(zdev);
	return rc;
}

/*
 * Enable/Disable a given PCI function defined by its function handle.
 */
static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
{
	struct clp_req_rsp_set_pci *rrb;
	int rc, retries = 100;

	rrb = clp_alloc_block(GFP_KERNEL);
	if (!rrb)
		return -ENOMEM;

	do {
		memset(rrb, 0, sizeof(*rrb));
		rrb->request.hdr.len = sizeof(rrb->request);
		rrb->request.hdr.cmd = CLP_SET_PCI_FN;
		rrb->response.hdr.len = sizeof(rrb->response);
		rrb->request.fh = *fh;
		rrb->request.oc = command;
		rrb->request.ndas = nr_dma_as;

		rc = clp_instr(rrb);
		if (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY) {
			retries--;
			if (retries < 0)
				break;
			msleep(20);
		}
	} while (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY);

	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
		*fh = rrb->response.fh;
	else {
		zpci_err("Set PCI FN:\n");
		zpci_err_clp(rrb->response.hdr.rsp, rc);
		rc = -EIO;
	}
	clp_free_block(rrb);
	return rc;
}

int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
{
	u32 fh = zdev->fh;
	int rc;

	rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_PCI_FN);
	if (!rc)
		/* Success -> store enabled handle in zdev */
		zdev->fh = fh;

	zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
	return rc;
}

int clp_disable_fh(struct zpci_dev *zdev)
{
	u32 fh = zdev->fh;
	int rc;

	if (!zdev_enabled(zdev))
		return 0;

	rc = clp_set_pci_fn(&fh, 0, CLP_SET_DISABLE_PCI_FN);
	if (!rc)
		/* Success -> store disabled handle in zdev */
		zdev->fh = fh;

	zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
	return rc;
}

static int clp_list_pci(struct clp_req_rsp_list_pci *rrb,
			void (*cb)(struct clp_fh_list_entry *entry))
{
	u64 resume_token = 0;
	int entries, i, rc;

	do {
		memset(rrb, 0, sizeof(*rrb));
		rrb->request.hdr.len = sizeof(rrb->request);
		rrb->request.hdr.cmd = CLP_LIST_PCI;
		/* store as many entries as possible */
		rrb->response.hdr.len = CLP_BLK_SIZE - LIST_PCI_HDR_LEN;
		rrb->request.resume_token = resume_token;

		/* Get PCI function handle list */
		rc = clp_instr(rrb);
		if (rc || rrb->response.hdr.rsp != CLP_RC_OK) {
			zpci_err("List PCI FN:\n");
			zpci_err_clp(rrb->response.hdr.rsp, rc);
			rc = -EIO;
			goto out;
		}

		WARN_ON_ONCE(rrb->response.entry_size !=
			sizeof(struct clp_fh_list_entry));

		entries = (rrb->response.hdr.len - LIST_PCI_HDR_LEN) /
			rrb->response.entry_size;

		resume_token = rrb->response.resume_token;
		for (i = 0; i < entries; i++)
			cb(&rrb->response.fh_list[i]);
	} while (resume_token);
out:
	return rc;
}

static void __clp_add(struct clp_fh_list_entry *entry)
{
	if (!entry->vendor_id)
		return;

	clp_add_pci_device(entry->fid, entry->fh, entry->config_state);
}

static void __clp_rescan(struct clp_fh_list_entry *entry)
{
	struct zpci_dev *zdev;

	if (!entry->vendor_id)
		return;

	zdev = get_zdev_by_fid(entry->fid);
	if (!zdev) {
		clp_add_pci_device(entry->fid, entry->fh, entry->config_state);
		return;
	}

	if (!entry->config_state) {
		/*
		 * The handle is already disabled, that means no iota/irq freeing via
		 * the firmware interfaces anymore. Need to free resources manually
		 * (DMA memory, debug, sysfs)...
		 */
		zpci_stop_device(zdev);
	}
}

static void __clp_update(struct clp_fh_list_entry *entry)
{
	struct zpci_dev *zdev;

	if (!entry->vendor_id)
		return;

	zdev = get_zdev_by_fid(entry->fid);
	if (!zdev)
		return;

	zdev->fh = entry->fh;
}

int clp_scan_pci_devices(void)
{
	struct clp_req_rsp_list_pci *rrb;
	int rc;

	rrb = clp_alloc_block(GFP_KERNEL);
	if (!rrb)
		return -ENOMEM;

	rc = clp_list_pci(rrb, __clp_add);

	clp_free_block(rrb);
	return rc;
}

int clp_rescan_pci_devices(void)
{
	struct clp_req_rsp_list_pci *rrb;
	int rc;

	rrb = clp_alloc_block(GFP_KERNEL);
	if (!rrb)
		return -ENOMEM;

	rc = clp_list_pci(rrb, __clp_rescan);

	clp_free_block(rrb);
	return rc;
}

int clp_rescan_pci_devices_simple(void)
{
	struct clp_req_rsp_list_pci *rrb;
	int rc;

	rrb = clp_alloc_block(GFP_NOWAIT);
	if (!rrb)
		return -ENOMEM;

	rc = clp_list_pci(rrb, __clp_update);

	clp_free_block(rrb);
	return rc;
}
Commit	Line	Data
a755a45d JG	1	/*
	2	* Copyright IBM Corp. 2012
	3	*
	4	* Author(s):
	5	* Jan Glauber <jang@linux.vnet.ibm.com>
	6	*/
	7
896cb7e6 GS	8	#define KMSG_COMPONENT "zpci"
896cb7e6 GS	9	#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
a755a45d JG	10
	11	#include <linux/kernel.h>
	12	#include <linux/slab.h>
	13	#include <linux/err.h>
	14	#include <linux/delay.h>
	15	#include <linux/pci.h>
a2ab8333	16	#include <asm/pci_debug.h>
a755a45d JG	17	#include <asm/pci_clp.h>
a755a45d JG	18
1f1dcbd4 SO	19	static inline void zpci_err_clp(unsigned int rsp, int rc)
	20	{
	21	struct {
	22	unsigned int rsp;
	23	int rc;
	24	} __packed data = {rsp, rc};
	25
	26	zpci_err_hex(&data, sizeof(data));
	27	}
	28
a755a45d JG	29	/*
	30	* Call Logical Processor
	31	* Retry logic is handled by the caller.
	32	*/
bf4ec24f	33	static inline u8 clp_instr(void *data)
a755a45d	34	{
bf4ec24f SO	35	struct { u8 _[CLP_BLK_SIZE]; } *req = data;
bf4ec24f SO	36	u64 ignored;
a755a45d JG	37	u8 cc;
	38
	39	asm volatile (
bf4ec24f	40	" .insn rrf,0xb9a00000,%[ign],%[req],0x0,0x2\n"
a755a45d JG	41	" ipm %[cc]\n"
a755a45d JG	42	" srl %[cc],28\n"
bf4ec24f	43	: [cc] "=d" (cc), [ign] "=d" (ignored), "+m" (*req)
a755a45d	44	: [req] "a" (req)
bf4ec24f	45	: "cc");
a755a45d JG	46	return cc;
	47	}
	48
1d578966	49	static void *clp_alloc_block(gfp_t gfp_mask)
a755a45d	50	{
1d578966	51	return (void *) __get_free_pages(gfp_mask, get_order(CLP_BLK_SIZE));
a755a45d JG	52	}
	53
	54	static void clp_free_block(void *ptr)
	55	{
	56	free_pages((unsigned long) ptr, get_order(CLP_BLK_SIZE));
	57	}
	58
	59	static void clp_store_query_pci_fngrp(struct zpci_dev *zdev,
	60	struct clp_rsp_query_pci_grp *response)
	61	{
828b35f6 JG	62	zdev->tlb_refresh = response->refresh;
828b35f6 JG	63	zdev->dma_mask = response->dasm;
9a4da8a5	64	zdev->msi_addr = response->msia;
d0b08853	65	zdev->fmb_update = response->mui;
9a4da8a5	66
a755a45d JG	67	switch (response->version) {
	68	case 1:
	69	zdev->max_bus_speed = PCIE_SPEED_5_0GT;
	70	break;
	71	default:
	72	zdev->max_bus_speed = PCI_SPEED_UNKNOWN;
	73	break;
	74	}
	75	}
	76
	77	static int clp_query_pci_fngrp(struct zpci_dev *zdev, u8 pfgid)
	78	{
	79	struct clp_req_rsp_query_pci_grp *rrb;
	80	int rc;
	81
1d578966	82	rrb = clp_alloc_block(GFP_KERNEL);
a755a45d JG	83	if (!rrb)
	84	return -ENOMEM;
	85
	86	memset(rrb, 0, sizeof(*rrb));
	87	rrb->request.hdr.len = sizeof(rrb->request);
	88	rrb->request.hdr.cmd = CLP_QUERY_PCI_FNGRP;
	89	rrb->response.hdr.len = sizeof(rrb->response);
	90	rrb->request.pfgid = pfgid;
	91
	92	rc = clp_instr(rrb);
	93	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
	94	clp_store_query_pci_fngrp(zdev, &rrb->response);
	95	else {
1f1dcbd4 SO	96	zpci_err("Q PCI FGRP:\n");
1f1dcbd4 SO	97	zpci_err_clp(rrb->response.hdr.rsp, rc);
a755a45d JG	98	rc = -EIO;
	99	}
	100	clp_free_block(rrb);
	101	return rc;
	102	}
	103
	104	static int clp_store_query_pci_fn(struct zpci_dev *zdev,
	105	struct clp_rsp_query_pci *response)
	106	{
	107	int i;
	108
	109	for (i = 0; i < PCI_BAR_COUNT; i++) {
	110	zdev->bars[i].val = le32_to_cpu(response->bar[i]);
	111	zdev->bars[i].size = response->bar_size[i];
	112	}
828b35f6 JG	113	zdev->start_dma = response->sdma;
828b35f6 JG	114	zdev->end_dma = response->edma;
a755a45d JG	115	zdev->pchid = response->pchid;
a755a45d JG	116	zdev->pfgid = response->pfgid;
ac4995b9 SO	117	zdev->pft = response->pft;
	118	zdev->vfn = response->vfn;
	119	zdev->uid = response->uid;
	120
	121	memcpy(zdev->pfip, response->pfip, sizeof(zdev->pfip));
	122	if (response->util_str_avail) {
	123	memcpy(zdev->util_str, response->util_str,
	124	sizeof(zdev->util_str));
	125	}
	126
a755a45d JG	127	return 0;
	128	}
	129
	130	static int clp_query_pci_fn(struct zpci_dev *zdev, u32 fh)
	131	{
	132	struct clp_req_rsp_query_pci *rrb;
	133	int rc;
	134
1d578966	135	rrb = clp_alloc_block(GFP_KERNEL);
a755a45d JG	136	if (!rrb)
	137	return -ENOMEM;
	138
	139	memset(rrb, 0, sizeof(*rrb));
	140	rrb->request.hdr.len = sizeof(rrb->request);
	141	rrb->request.hdr.cmd = CLP_QUERY_PCI_FN;
	142	rrb->response.hdr.len = sizeof(rrb->response);
	143	rrb->request.fh = fh;
	144
	145	rc = clp_instr(rrb);
	146	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK) {
	147	rc = clp_store_query_pci_fn(zdev, &rrb->response);
	148	if (rc)
	149	goto out;
	150	if (rrb->response.pfgid)
	151	rc = clp_query_pci_fngrp(zdev, rrb->response.pfgid);
	152	} else {
1f1dcbd4 SO	153	zpci_err("Q PCI FN:\n");
1f1dcbd4 SO	154	zpci_err_clp(rrb->response.hdr.rsp, rc);
a755a45d JG	155	rc = -EIO;
	156	}
	157	out:
	158	clp_free_block(rrb);
	159	return rc;
	160	}
	161
	162	int clp_add_pci_device(u32 fid, u32 fh, int configured)
	163	{
	164	struct zpci_dev *zdev;
	165	int rc;
	166
a2ab8333	167	zpci_dbg(3, "add fid:%x, fh:%x, c:%d\n", fid, fh, configured);
7d594322 SO	168	zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
	169	if (!zdev)
	170	return -ENOMEM;
a755a45d JG	171
	172	zdev->fh = fh;
	173	zdev->fid = fid;
	174
	175	/* Query function properties and update zdev */
	176	rc = clp_query_pci_fn(zdev, fh);
	177	if (rc)
	178	goto error;
	179
	180	if (configured)
	181	zdev->state = ZPCI_FN_STATE_CONFIGURED;
	182	else
	183	zdev->state = ZPCI_FN_STATE_STANDBY;
	184
	185	rc = zpci_create_device(zdev);
	186	if (rc)
	187	goto error;
	188	return 0;
	189
	190	error:
7d594322	191	kfree(zdev);
a755a45d JG	192	return rc;
	193	}
	194
	195	/*
	196	* Enable/Disable a given PCI function defined by its function handle.
	197	*/
	198	static int clp_set_pci_fn(u32 *fh, u8 nr_dma_as, u8 command)
	199	{
	200	struct clp_req_rsp_set_pci *rrb;
d03abe58	201	int rc, retries = 100;
a755a45d	202
1d578966	203	rrb = clp_alloc_block(GFP_KERNEL);
a755a45d JG	204	if (!rrb)
	205	return -ENOMEM;
	206
	207	do {
	208	memset(rrb, 0, sizeof(*rrb));
	209	rrb->request.hdr.len = sizeof(rrb->request);
	210	rrb->request.hdr.cmd = CLP_SET_PCI_FN;
	211	rrb->response.hdr.len = sizeof(rrb->response);
	212	rrb->request.fh = *fh;
	213	rrb->request.oc = command;
	214	rrb->request.ndas = nr_dma_as;
	215
	216	rc = clp_instr(rrb);
	217	if (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY) {
	218	retries--;
	219	if (retries < 0)
	220	break;
d03abe58	221	msleep(20);
a755a45d JG	222	}
	223	} while (rrb->response.hdr.rsp == CLP_RC_SETPCIFN_BUSY);
	224
	225	if (!rc && rrb->response.hdr.rsp == CLP_RC_OK)
	226	*fh = rrb->response.fh;
	227	else {
1f1dcbd4 SO	228	zpci_err("Set PCI FN:\n");
1f1dcbd4 SO	229	zpci_err_clp(rrb->response.hdr.rsp, rc);
a755a45d JG	230	rc = -EIO;
	231	}
	232	clp_free_block(rrb);
	233	return rc;
	234	}
	235
	236	int clp_enable_fh(struct zpci_dev *zdev, u8 nr_dma_as)
	237	{
	238	u32 fh = zdev->fh;
	239	int rc;
	240
	241	rc = clp_set_pci_fn(&fh, nr_dma_as, CLP_SET_ENABLE_PCI_FN);
	242	if (!rc)
	243	/* Success -> store enabled handle in zdev */
	244	zdev->fh = fh;
a2ab8333 SO	245
a2ab8333 SO	246	zpci_dbg(3, "ena fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
a755a45d JG	247	return rc;
	248	}
	249
	250	int clp_disable_fh(struct zpci_dev *zdev)
	251	{
	252	u32 fh = zdev->fh;
	253	int rc;
	254
	255	if (!zdev_enabled(zdev))
	256	return 0;
	257
a755a45d JG	258	rc = clp_set_pci_fn(&fh, 0, CLP_SET_DISABLE_PCI_FN);
	259	if (!rc)
	260	/* Success -> store disabled handle in zdev */
	261	zdev->fh = fh;
a2ab8333 SO	262
a2ab8333 SO	263	zpci_dbg(3, "dis fid:%x, fh:%x, rc:%d\n", zdev->fid, zdev->fh, rc);
a755a45d JG	264	return rc;
	265	}
	266
1d578966 SO	267	static int clp_list_pci(struct clp_req_rsp_list_pci *rrb,
1d578966 SO	268	void (cb)(struct clp_fh_list_entry entry))
a755a45d	269	{
a755a45d JG	270	u64 resume_token = 0;
	271	int entries, i, rc;
	272
a755a45d JG	273	do {
	274	memset(rrb, 0, sizeof(*rrb));
	275	rrb->request.hdr.len = sizeof(rrb->request);
	276	rrb->request.hdr.cmd = CLP_LIST_PCI;
	277	/* store as many entries as possible */
	278	rrb->response.hdr.len = CLP_BLK_SIZE - LIST_PCI_HDR_LEN;
	279	rrb->request.resume_token = resume_token;
	280
	281	/* Get PCI function handle list */
	282	rc = clp_instr(rrb);
	283	if (rc \|\| rrb->response.hdr.rsp != CLP_RC_OK) {
1f1dcbd4 SO	284	zpci_err("List PCI FN:\n");
1f1dcbd4 SO	285	zpci_err_clp(rrb->response.hdr.rsp, rc);
a755a45d JG	286	rc = -EIO;
	287	goto out;
	288	}
	289
	290	WARN_ON_ONCE(rrb->response.entry_size !=
	291	sizeof(struct clp_fh_list_entry));
	292
	293	entries = (rrb->response.hdr.len - LIST_PCI_HDR_LEN) /
	294	rrb->response.entry_size;
a755a45d	295
a755a45d	296	resume_token = rrb->response.resume_token;
a755a45d	297	for (i = 0; i < entries; i++)
1d578966	298	cb(&rrb->response.fh_list[i]);
a755a45d	299	} while (resume_token);
a755a45d	300	out:
1d578966 SO	301	return rc;
	302	}
	303
	304	static void __clp_add(struct clp_fh_list_entry *entry)
	305	{
	306	if (!entry->vendor_id)
	307	return;
	308
	309	clp_add_pci_device(entry->fid, entry->fh, entry->config_state);
	310	}
	311
	312	static void __clp_rescan(struct clp_fh_list_entry *entry)
	313	{
	314	struct zpci_dev *zdev;
	315
	316	if (!entry->vendor_id)
	317	return;
	318
	319	zdev = get_zdev_by_fid(entry->fid);
	320	if (!zdev) {
	321	clp_add_pci_device(entry->fid, entry->fh, entry->config_state);
	322	return;
	323	}
	324
	325	if (!entry->config_state) {
	326	/*
	327	* The handle is already disabled, that means no iota/irq freeing via
	328	* the firmware interfaces anymore. Need to free resources manually
	329	* (DMA memory, debug, sysfs)...
	330	*/
	331	zpci_stop_device(zdev);
	332	}
	333	}
	334
57b5918c SO	335	static void __clp_update(struct clp_fh_list_entry *entry)
	336	{
	337	struct zpci_dev *zdev;
	338
	339	if (!entry->vendor_id)
	340	return;
	341
	342	zdev = get_zdev_by_fid(entry->fid);
	343	if (!zdev)
	344	return;
	345
	346	zdev->fh = entry->fh;
	347	}
	348
1d578966 SO	349	int clp_scan_pci_devices(void)
	350	{
	351	struct clp_req_rsp_list_pci *rrb;
	352	int rc;
	353
	354	rrb = clp_alloc_block(GFP_KERNEL);
	355	if (!rrb)
	356	return -ENOMEM;
	357
	358	rc = clp_list_pci(rrb, __clp_add);
	359
	360	clp_free_block(rrb);
	361	return rc;
	362	}
	363
	364	int clp_rescan_pci_devices(void)
	365	{
	366	struct clp_req_rsp_list_pci *rrb;
	367	int rc;
	368
	369	rrb = clp_alloc_block(GFP_KERNEL);
	370	if (!rrb)
	371	return -ENOMEM;
	372
	373	rc = clp_list_pci(rrb, __clp_rescan);
	374
a755a45d JG	375	clp_free_block(rrb);
	376	return rc;
	377	}
57b5918c SO	378
	379	int clp_rescan_pci_devices_simple(void)
	380	{
	381	struct clp_req_rsp_list_pci *rrb;
	382	int rc;
	383
	384	rrb = clp_alloc_block(GFP_NOWAIT);
	385	if (!rrb)
	386	return -ENOMEM;
	387
	388	rc = clp_list_pci(rrb, __clp_update);
	389
	390	clp_free_block(rrb);
	391	return rc;
	392	}