1 files changed, 0 insertions, 491 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/msi.c b/ANDROID_3.4.5/arch/powerpc/platforms/pseries/msi.c
deleted file mode 100644
index 109fdb75..00000000
--- a/ANDROID_3.4.5/arch/powerpc/platforms/pseries/msi.c
+++ /dev/null
@@ -1,491 +0,0 @@
-/*
- * Copyright 2006 Jake Moilanen <moilanen@austin.ibm.com>, IBM Corp.
- * Copyright 2006-2007 Michael Ellerman, IBM Corp.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2 of the
- * License.
- *
- */
-
-#include <linux/device.h>
-#include <linux/irq.h>
-#include <linux/msi.h>
-
-#include <asm/rtas.h>
-#include <asm/hw_irq.h>
-#include <asm/ppc-pci.h>
-
-static int query_token, change_token;
-
-#define RTAS_QUERY_FN		0
-#define RTAS_CHANGE_FN		1
-#define RTAS_RESET_FN		2
-#define RTAS_CHANGE_MSI_FN	3
-#define RTAS_CHANGE_MSIX_FN	4
-
-static struct pci_dn *get_pdn(struct pci_dev *pdev)
-{
-	struct device_node *dn;
-	struct pci_dn *pdn;
-
-	dn = pci_device_to_OF_node(pdev);
-	if (!dn) {
-		dev_dbg(&pdev->dev, "rtas_msi: No OF device node\n");
-		return NULL;
-	}
-
-	pdn = PCI_DN(dn);
-	if (!pdn) {
-		dev_dbg(&pdev->dev, "rtas_msi: No PCI DN\n");
-		return NULL;
-	}
-
-	return pdn;
-}
-
-/* RTAS Helpers */
-
-static int rtas_change_msi(struct pci_dn *pdn, u32 func, u32 num_irqs)
-{
-	u32 addr, seq_num, rtas_ret[3];
-	unsigned long buid;
-	int rc;
-
-	addr = rtas_config_addr(pdn->busno, pdn->devfn, 0);
-	buid = pdn->phb->buid;
-
-	seq_num = 1;
-	do {
-		if (func == RTAS_CHANGE_MSI_FN || func == RTAS_CHANGE_MSIX_FN)
-			rc = rtas_call(change_token, 6, 4, rtas_ret, addr,
-					BUID_HI(buid), BUID_LO(buid),
-					func, num_irqs, seq_num);
-		else
-			rc = rtas_call(change_token, 6, 3, rtas_ret, addr,
-					BUID_HI(buid), BUID_LO(buid),
-					func, num_irqs, seq_num);
-
-		seq_num = rtas_ret[1];
-	} while (rtas_busy_delay(rc));
-
-	/*
-	 * If the RTAS call succeeded, return the number of irqs allocated.
-	 * If not, make sure we return a negative error code.
-	 */
-	if (rc == 0)
-		rc = rtas_ret[0];
-	else if (rc > 0)
-		rc = -rc;
-
-	pr_debug("rtas_msi: ibm,change_msi(func=%d,num=%d), got %d rc = %d\n",
-		 func, num_irqs, rtas_ret[0], rc);
-
-	return rc;
-}
-
-static void rtas_disable_msi(struct pci_dev *pdev)
-{
-	struct pci_dn *pdn;
-
-	pdn = get_pdn(pdev);
-	if (!pdn)
-		return;
-
-	/*
-	 * disabling MSI with the explicit interface also disables MSI-X
-	 */
-	if (rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, 0) != 0) {
-		/* 
-		 * may have failed because explicit interface is not
-		 * present
-		 */
-		if (rtas_change_msi(pdn, RTAS_CHANGE_FN, 0) != 0) {
-			pr_debug("rtas_msi: Setting MSIs to 0 failed!\n");
-		}
-	}
-}
-
-static int rtas_query_irq_number(struct pci_dn *pdn, int offset)
-{
-	u32 addr, rtas_ret[2];
-	unsigned long buid;
-	int rc;
-
-	addr = rtas_config_addr(pdn->busno, pdn->devfn, 0);
-	buid = pdn->phb->buid;
-
-	do {
-		rc = rtas_call(query_token, 4, 3, rtas_ret, addr,
-			       BUID_HI(buid), BUID_LO(buid), offset);
-	} while (rtas_busy_delay(rc));
-
-	if (rc) {
-		pr_debug("rtas_msi: error (%d) querying source number\n", rc);
-		return rc;
-	}
-
-	return rtas_ret[0];
-}
-
-static void rtas_teardown_msi_irqs(struct pci_dev *pdev)
-{
-	struct msi_desc *entry;
-
-	list_for_each_entry(entry, &pdev->msi_list, list) {
-		if (entry->irq == NO_IRQ)
-			continue;
-
-		irq_set_msi_desc(entry->irq, NULL);
-		irq_dispose_mapping(entry->irq);
-	}
-
-	rtas_disable_msi(pdev);
-}
-
-static int check_req(struct pci_dev *pdev, int nvec, char *prop_name)
-{
-	struct device_node *dn;
-	struct pci_dn *pdn;
-	const u32 *req_msi;
-
-	pdn = get_pdn(pdev);
-	if (!pdn)
-		return -ENODEV;
-
-	dn = pdn->node;
-
-	req_msi = of_get_property(dn, prop_name, NULL);
-	if (!req_msi) {
-		pr_debug("rtas_msi: No %s on %s\n", prop_name, dn->full_name);
-		return -ENOENT;
-	}
-
-	if (*req_msi < nvec) {
-		pr_debug("rtas_msi: %s requests < %d MSIs\n", prop_name, nvec);
-
-		if (*req_msi == 0) /* Be paranoid */
-			return -ENOSPC;
-
-		return *req_msi;
-	}
-
-	return 0;
-}
-
-static int check_req_msi(struct pci_dev *pdev, int nvec)
-{
-	return check_req(pdev, nvec, "ibm,req#msi");
-}
-
-static int check_req_msix(struct pci_dev *pdev, int nvec)
-{
-	return check_req(pdev, nvec, "ibm,req#msi-x");
-}
-
-/* Quota calculation */
-
-static struct device_node *find_pe_total_msi(struct pci_dev *dev, int *total)
-{
-	struct device_node *dn;
-	const u32 *p;
-
-	dn = of_node_get(pci_device_to_OF_node(dev));
-	while (dn) {
-		p = of_get_property(dn, "ibm,pe-total-#msi", NULL);
-		if (p) {
-			pr_debug("rtas_msi: found prop on dn %s\n",
-				dn->full_name);
-			*total = *p;
-			return dn;
-		}
-
-		dn = of_get_next_parent(dn);
-	}
-
-	return NULL;
-}
-
-static struct device_node *find_pe_dn(struct pci_dev *dev, int *total)
-{
-	struct device_node *dn;
-
-	/* Found our PE and assume 8 at that point. */
-
-	dn = pci_device_to_OF_node(dev);
-	if (!dn)
-		return NULL;
-
-	dn = eeh_find_device_pe(dn);
-	if (!dn)
-		return NULL;
-
-	/* We actually want the parent */
-	dn = of_get_parent(dn);
-	if (!dn)
-		return NULL;
-
-	/* Hardcode of 8 for old firmwares */
-	*total = 8;
-	pr_debug("rtas_msi: using PE dn %s\n", dn->full_name);
-
-	return dn;
-}
-
-struct msi_counts {
-	struct device_node *requestor;
-	int num_devices;
-	int request;
-	int quota;
-	int spare;
-	int over_quota;
-};
-
-static void *count_non_bridge_devices(struct device_node *dn, void *data)
-{
-	struct msi_counts *counts = data;
-	const u32 *p;
-	u32 class;
-
-	pr_debug("rtas_msi: counting %s\n", dn->full_name);
-
-	p = of_get_property(dn, "class-code", NULL);
-	class = p ? *p : 0;
-
-	if ((class >> 8) != PCI_CLASS_BRIDGE_PCI)
-		counts->num_devices++;
-
-	return NULL;
-}
-
-static void *count_spare_msis(struct device_node *dn, void *data)
-{
-	struct msi_counts *counts = data;
-	const u32 *p;
-	int req;
-
-	if (dn == counts->requestor)
-		req = counts->request;
-	else {
-		/* We don't know if a driver will try to use MSI or MSI-X,
-		 * so we just have to punt and use the larger of the two. */
-		req = 0;
-		p = of_get_property(dn, "ibm,req#msi", NULL);
-		if (p)
-			req = *p;
-
-		p = of_get_property(dn, "ibm,req#msi-x", NULL);
-		if (p)
-			req = max(req, (int)*p);
-	}
-
-	if (req < counts->quota)
-		counts->spare += counts->quota - req;
-	else if (req > counts->quota)
-		counts->over_quota++;
-
-	return NULL;
-}
-
-static int msi_quota_for_device(struct pci_dev *dev, int request)
-{
-	struct device_node *pe_dn;
-	struct msi_counts counts;
-	int total;
-
-	pr_debug("rtas_msi: calc quota for %s, request %d\n", pci_name(dev),
-		  request);
-
-	pe_dn = find_pe_total_msi(dev, &total);
-	if (!pe_dn)
-		pe_dn = find_pe_dn(dev, &total);
-
-	if (!pe_dn) {
-		pr_err("rtas_msi: couldn't find PE for %s\n", pci_name(dev));
-		goto out;
-	}
-
-	pr_debug("rtas_msi: found PE %s\n", pe_dn->full_name);
-
-	memset(&counts, 0, sizeof(struct msi_counts));
-
-	/* Work out how many devices we have below this PE */
-	traverse_pci_devices(pe_dn, count_non_bridge_devices, &counts);
-
-	if (counts.num_devices == 0) {
-		pr_err("rtas_msi: found 0 devices under PE for %s\n",
-			pci_name(dev));
-		goto out;
-	}
-
-	counts.quota = total / counts.num_devices;
-	if (request <= counts.quota)
-		goto out;
-
-	/* else, we have some more calculating to do */
-	counts.requestor = pci_device_to_OF_node(dev);
-	counts.request = request;
-	traverse_pci_devices(pe_dn, count_spare_msis, &counts);
-
-	/* If the quota isn't an integer multiple of the total, we can
-	 * use the remainder as spare MSIs for anyone that wants them. */
-	counts.spare += total % counts.num_devices;
-
-	/* Divide any spare by the number of over-quota requestors */
-	if (counts.over_quota)
-		counts.quota += counts.spare / counts.over_quota;
-
-	/* And finally clamp the request to the possibly adjusted quota */
-	request = min(counts.quota, request);
-
-	pr_debug("rtas_msi: request clamped to quota %d\n", request);
-out:
-	of_node_put(pe_dn);
-
-	return request;
-}
-
-static int rtas_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-	int quota, rc;
-
-	if (type == PCI_CAP_ID_MSIX)
-		rc = check_req_msix(pdev, nvec);
-	else
-		rc = check_req_msi(pdev, nvec);
-
-	if (rc)
-		return rc;
-
-	quota = msi_quota_for_device(pdev, nvec);
-
-	if (quota && quota < nvec)
-		return quota;
-
-	return 0;
-}
-
-static int check_msix_entries(struct pci_dev *pdev)
-{
-	struct msi_desc *entry;
-	int expected;
-
-	/* There's no way for us to express to firmware that we want
-	 * a discontiguous, or non-zero based, range of MSI-X entries.
-	 * So we must reject such requests. */
-
-	expected = 0;
-	list_for_each_entry(entry, &pdev->msi_list, list) {
-		if (entry->msi_attrib.entry_nr != expected) {
-			pr_debug("rtas_msi: bad MSI-X entries.\n");
-			return -EINVAL;
-		}
-		expected++;
-	}
-
-	return 0;
-}
-
-static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
-{
-	struct pci_dn *pdn;
-	int hwirq, virq, i, rc;
-	struct msi_desc *entry;
-	struct msi_msg msg;
-
-	pdn = get_pdn(pdev);
-	if (!pdn)
-		return -ENODEV;
-
-	if (type == PCI_CAP_ID_MSIX && check_msix_entries(pdev))
-		return -EINVAL;
-
-	/*
-	 * Try the new more explicit firmware interface, if that fails fall
-	 * back to the old interface. The old interface is known to never
-	 * return MSI-Xs.
-	 */
-	if (type == PCI_CAP_ID_MSI) {
-		rc = rtas_change_msi(pdn, RTAS_CHANGE_MSI_FN, nvec);
-
-		if (rc < 0) {
-			pr_debug("rtas_msi: trying the old firmware call.\n");
-			rc = rtas_change_msi(pdn, RTAS_CHANGE_FN, nvec);
-		}
-	} else
-		rc = rtas_change_msi(pdn, RTAS_CHANGE_MSIX_FN, nvec);
-
-	if (rc != nvec) {
-		pr_debug("rtas_msi: rtas_change_msi() failed\n");
-		return rc;
-	}
-
-	i = 0;
-	list_for_each_entry(entry, &pdev->msi_list, list) {
-		hwirq = rtas_query_irq_number(pdn, i++);
-		if (hwirq < 0) {
-			pr_debug("rtas_msi: error (%d) getting hwirq\n", rc);
-			return hwirq;
-		}
-
-		virq = irq_create_mapping(NULL, hwirq);
-
-		if (virq == NO_IRQ) {
-			pr_debug("rtas_msi: Failed mapping hwirq %d\n", hwirq);
-			return -ENOSPC;
-		}
-
-		dev_dbg(&pdev->dev, "rtas_msi: allocated virq %d\n", virq);
-		irq_set_msi_desc(virq, entry);
-
-		/* Read config space back so we can restore after reset */
-		read_msi_msg(virq, &msg);
-		entry->msg = msg;
-	}
-
-	return 0;
-}
-
-static void rtas_msi_pci_irq_fixup(struct pci_dev *pdev)
-{
-	/* No LSI -> leave MSIs (if any) configured */
-	if (pdev->irq == NO_IRQ) {
-		dev_dbg(&pdev->dev, "rtas_msi: no LSI, nothing to do.\n");
-		return;
-	}
-
-	/* No MSI -> MSIs can't have been assigned by fw, leave LSI */
-	if (check_req_msi(pdev, 1) && check_req_msix(pdev, 1)) {
-		dev_dbg(&pdev->dev, "rtas_msi: no req#msi/x, nothing to do.\n");
-		return;
-	}
-
-	dev_dbg(&pdev->dev, "rtas_msi: disabling existing MSI.\n");
-	rtas_disable_msi(pdev);
-}
-
-static int rtas_msi_init(void)
-{
-	query_token  = rtas_token("ibm,query-interrupt-source-number");
-	change_token = rtas_token("ibm,change-msi");
-
-	if ((query_token == RTAS_UNKNOWN_SERVICE) ||
-			(change_token == RTAS_UNKNOWN_SERVICE)) {
-		pr_debug("rtas_msi: no RTAS tokens, no MSI support.\n");
-		return -1;
-	}
-
-	pr_debug("rtas_msi: Registering RTAS MSI callbacks.\n");
-
-	WARN_ON(ppc_md.setup_msi_irqs);
-	ppc_md.setup_msi_irqs = rtas_setup_msi_irqs;
-	ppc_md.teardown_msi_irqs = rtas_teardown_msi_irqs;
-	ppc_md.msi_check_device = rtas_msi_check_device;
-
-	WARN_ON(ppc_md.pci_irq_fixup);
-	ppc_md.pci_irq_fixup = rtas_msi_pci_irq_fixup;
-
-	return 0;
-}
-arch_initcall(rtas_msi_init);