[deliverable/linux.git] / drivers / pci / msi-altix.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2006 Silicon Graphics, Inc.  All Rights Reserved.
 */

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/cpumask.h>

#include <asm/sn/addrs.h>
#include <asm/sn/intr.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/nodepda.h>

#include "msi.h"

struct sn_msi_info {
	u64 pci_addr;
	struct sn_irq_info *sn_irq_info;
};

static struct sn_msi_info *sn_msi_info;

static void
sn_msi_teardown(unsigned int vector)
{
	nasid_t nasid;
	int widget;
	struct pci_dev *pdev;
	struct pcidev_info *sn_pdev;
	struct sn_irq_info *sn_irq_info;
	struct pcibus_bussoft *bussoft;
	struct sn_pcibus_provider *provider;

	sn_irq_info = sn_msi_info[vector].sn_irq_info;
	if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
		return;

	sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
	pdev = sn_pdev->pdi_linux_pcidev;
	provider = SN_PCIDEV_BUSPROVIDER(pdev);

	(*provider->dma_unmap)(pdev,
			       sn_msi_info[vector].pci_addr,
			       PCI_DMA_FROMDEVICE);
	sn_msi_info[vector].pci_addr = 0;

	bussoft = SN_PCIDEV_BUSSOFT(pdev);
	nasid = NASID_GET(bussoft->bs_base);
	widget = (nasid & 1) ?
			TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
			SWIN_WIDGETNUM(bussoft->bs_base);

	sn_intr_free(nasid, widget, sn_irq_info);
	sn_msi_info[vector].sn_irq_info = NULL;

	return;
}

int
sn_msi_setup(struct pci_dev *pdev, unsigned int vector,
	     u32 *addr_hi, u32 *addr_lo, u32 *data)
{
	int widget;
	int status;
	nasid_t nasid;
	u64 bus_addr;
	struct sn_irq_info *sn_irq_info;
	struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev);
	struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);

	if (bussoft == NULL)
		return -EINVAL;

	if (provider == NULL || provider->dma_map_consistent == NULL)
		return -EINVAL;

	/*
	 * Set up the vector plumbing.  Let the prom (via sn_intr_alloc)
	 * decide which cpu to direct this msi at by default.
	 */

	nasid = NASID_GET(bussoft->bs_base);
	widget = (nasid & 1) ?
			TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
			SWIN_WIDGETNUM(bussoft->bs_base);

	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
	if (! sn_irq_info)
		return -ENOMEM;

	status = sn_intr_alloc(nasid, widget, sn_irq_info, vector, -1, -1);
	if (status) {
		kfree(sn_irq_info);
		return -ENOMEM;
	}

	sn_irq_info->irq_int_bit = -1;		/* mark this as an MSI irq */
	sn_irq_fixup(pdev, sn_irq_info);

	/* Prom probably should fill these in, but doesn't ... */
	sn_irq_info->irq_bridge_type = bussoft->bs_asic_type;
	sn_irq_info->irq_bridge = (void *)bussoft->bs_base;

	/*
	 * Map the xio address into bus space
	 */
	bus_addr = (*provider->dma_map_consistent)(pdev,
					sn_irq_info->irq_xtalkaddr,
					sizeof(sn_irq_info->irq_xtalkaddr),
					SN_DMA_MSI|SN_DMA_ADDR_XIO);
	if (! bus_addr) {
		sn_intr_free(nasid, widget, sn_irq_info);
		kfree(sn_irq_info);
		return -ENOMEM;
	}

	sn_msi_info[vector].sn_irq_info = sn_irq_info;
	sn_msi_info[vector].pci_addr = bus_addr;

	*addr_hi = (u32)(bus_addr >> 32);
	*addr_lo = (u32)(bus_addr & 0x00000000ffffffff);

	/*
	 * In the SN platform, bit 16 is a "send vector" bit which
	 * must be present in order to move the vector through the system.
	 */
	*data = 0x100 + (unsigned int)vector;

#ifdef CONFIG_SMP
	set_irq_affinity_info((vector & 0xff), sn_irq_info->irq_cpuid, 0);
#endif

	return 0;
}

static void
sn_msi_target(unsigned int vector, unsigned int cpu,
	      u32 *addr_hi, u32 *addr_lo)
{
	int slice;
	nasid_t nasid;
	u64 bus_addr;
	struct pci_dev *pdev;
	struct pcidev_info *sn_pdev;
	struct sn_irq_info *sn_irq_info;
	struct sn_irq_info *new_irq_info;
	struct sn_pcibus_provider *provider;

	sn_irq_info = sn_msi_info[vector].sn_irq_info;
	if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
		return;

	/*
	 * Release XIO resources for the old MSI PCI address
	 */

        sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
	pdev = sn_pdev->pdi_linux_pcidev;
	provider = SN_PCIDEV_BUSPROVIDER(pdev);

	bus_addr = (u64)(*addr_hi) << 32 | (u64)(*addr_lo);
	(*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE);
	sn_msi_info[vector].pci_addr = 0;

	nasid = cpuid_to_nasid(cpu);
	slice = cpuid_to_slice(cpu);

	new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
	sn_msi_info[vector].sn_irq_info = new_irq_info;
	if (new_irq_info == NULL)
		return;

	/*
	 * Map the xio address into bus space
	 */

	bus_addr = (*provider->dma_map_consistent)(pdev,
					new_irq_info->irq_xtalkaddr,
					sizeof(new_irq_info->irq_xtalkaddr),
					SN_DMA_MSI|SN_DMA_ADDR_XIO);

	sn_msi_info[vector].pci_addr = bus_addr;
	*addr_hi = (u32)(bus_addr >> 32);
	*addr_lo = (u32)(bus_addr & 0x00000000ffffffff);
}

struct msi_ops sn_msi_ops = {
	.setup = sn_msi_setup,
	.teardown = sn_msi_teardown,
#ifdef CONFIG_SMP
	.target = sn_msi_target,
#endif
};

int
sn_msi_init(void)
{
	sn_msi_info =
		kzalloc(sizeof(struct sn_msi_info) * NR_VECTORS, GFP_KERNEL);
	if (! sn_msi_info)
		return -ENOMEM;

	msi_register(&sn_msi_ops);
	return 0;
}
Commit	Line	Data
fd58e55f MM	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved.
	7	*/
	8
83821d3f MM	9	#include <linux/types.h>
	10	#include <linux/pci.h>
	11	#include <linux/cpumask.h>
	12
	13	#include <asm/sn/addrs.h>
	14	#include <asm/sn/intr.h>
	15	#include <asm/sn/pcibus_provider_defs.h>
	16	#include <asm/sn/pcidev.h>
	17	#include <asm/sn/nodepda.h>
	18
	19	#include "msi.h"
	20
	21	struct sn_msi_info {
	22	u64 pci_addr;
	23	struct sn_irq_info *sn_irq_info;
	24	};
	25
	26	static struct sn_msi_info *sn_msi_info;
	27
	28	static void
	29	sn_msi_teardown(unsigned int vector)
	30	{
	31	nasid_t nasid;
	32	int widget;
	33	struct pci_dev *pdev;
	34	struct pcidev_info *sn_pdev;
	35	struct sn_irq_info *sn_irq_info;
	36	struct pcibus_bussoft *bussoft;
	37	struct sn_pcibus_provider *provider;
	38
	39	sn_irq_info = sn_msi_info[vector].sn_irq_info;
	40	if (sn_irq_info == NULL \|\| sn_irq_info->irq_int_bit >= 0)
	41	return;
	42
	43	sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
	44	pdev = sn_pdev->pdi_linux_pcidev;
	45	provider = SN_PCIDEV_BUSPROVIDER(pdev);
	46
	47	(*provider->dma_unmap)(pdev,
	48	sn_msi_info[vector].pci_addr,
	49	PCI_DMA_FROMDEVICE);
	50	sn_msi_info[vector].pci_addr = 0;
	51
	52	bussoft = SN_PCIDEV_BUSSOFT(pdev);
	53	nasid = NASID_GET(bussoft->bs_base);
	54	widget = (nasid & 1) ?
	55	TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
	56	SWIN_WIDGETNUM(bussoft->bs_base);
	57
	58	sn_intr_free(nasid, widget, sn_irq_info);
	59	sn_msi_info[vector].sn_irq_info = NULL;
	60
	61	return;
	62	}
fd58e55f MM	63
fd58e55f MM	64	int
83821d3f MM	65	sn_msi_setup(struct pci_dev *pdev, unsigned int vector,
83821d3f MM	66	u32 addr_hi, u32 addr_lo, u32 *data)
fd58e55f	67	{
83821d3f MM	68	int widget;
	69	int status;
	70	nasid_t nasid;
	71	u64 bus_addr;
	72	struct sn_irq_info *sn_irq_info;
	73	struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev);
	74	struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
	75
	76	if (bussoft == NULL)
	77	return -EINVAL;
	78
	79	if (provider == NULL \|\| provider->dma_map_consistent == NULL)
	80	return -EINVAL;
	81
	82	/*
	83	* Set up the vector plumbing. Let the prom (via sn_intr_alloc)
	84	* decide which cpu to direct this msi at by default.
	85	*/
	86
	87	nasid = NASID_GET(bussoft->bs_base);
	88	widget = (nasid & 1) ?
	89	TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
	90	SWIN_WIDGETNUM(bussoft->bs_base);
	91
	92	sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
	93	if (! sn_irq_info)
	94	return -ENOMEM;
	95
	96	status = sn_intr_alloc(nasid, widget, sn_irq_info, vector, -1, -1);
	97	if (status) {
	98	kfree(sn_irq_info);
	99	return -ENOMEM;
	100	}
	101
	102	sn_irq_info->irq_int_bit = -1; /* mark this as an MSI irq */
	103	sn_irq_fixup(pdev, sn_irq_info);
	104
	105	/* Prom probably should fill these in, but doesn't ... */
	106	sn_irq_info->irq_bridge_type = bussoft->bs_asic_type;
	107	sn_irq_info->irq_bridge = (void *)bussoft->bs_base;
	108
fd58e55f	109	/*
83821d3f	110	* Map the xio address into bus space
fd58e55f	111	*/
83821d3f MM	112	bus_addr = (*provider->dma_map_consistent)(pdev,
	113	sn_irq_info->irq_xtalkaddr,
	114	sizeof(sn_irq_info->irq_xtalkaddr),
	115	SN_DMA_MSI\|SN_DMA_ADDR_XIO);
	116	if (! bus_addr) {
	117	sn_intr_free(nasid, widget, sn_irq_info);
	118	kfree(sn_irq_info);
	119	return -ENOMEM;
	120	}
	121
	122	sn_msi_info[vector].sn_irq_info = sn_irq_info;
	123	sn_msi_info[vector].pci_addr = bus_addr;
	124
	125	*addr_hi = (u32)(bus_addr >> 32);
	126	*addr_lo = (u32)(bus_addr & 0x00000000ffffffff);
	127
	128	/*
	129	* In the SN platform, bit 16 is a "send vector" bit which
	130	* must be present in order to move the vector through the system.
	131	*/
	132	*data = 0x100 + (unsigned int)vector;
	133
	134	#ifdef CONFIG_SMP
	135	set_irq_affinity_info((vector & 0xff), sn_irq_info->irq_cpuid, 0);
	136	#endif
	137
	138	return 0;
	139	}
	140
	141	static void
	142	sn_msi_target(unsigned int vector, unsigned int cpu,
	143	u32 addr_hi, u32 addr_lo)
	144	{
	145	int slice;
	146	nasid_t nasid;
	147	u64 bus_addr;
	148	struct pci_dev *pdev;
	149	struct pcidev_info *sn_pdev;
	150	struct sn_irq_info *sn_irq_info;
	151	struct sn_irq_info *new_irq_info;
	152	struct sn_pcibus_provider *provider;
	153
	154	sn_irq_info = sn_msi_info[vector].sn_irq_info;
	155	if (sn_irq_info == NULL \|\| sn_irq_info->irq_int_bit >= 0)
	156	return;
	157
	158	/*
	159	* Release XIO resources for the old MSI PCI address
	160	*/
	161
	162	sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
	163	pdev = sn_pdev->pdi_linux_pcidev;
	164	provider = SN_PCIDEV_BUSPROVIDER(pdev);
	165
	166	bus_addr = (u64)(addr_hi) << 32 \| (u64)(addr_lo);
	167	(*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE);
	168	sn_msi_info[vector].pci_addr = 0;
	169
	170	nasid = cpuid_to_nasid(cpu);
	171	slice = cpuid_to_slice(cpu);
	172
	173	new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
	174	sn_msi_info[vector].sn_irq_info = new_irq_info;
	175	if (new_irq_info == NULL)
176	return;
177
178	/*
179	* Map the xio address into bus space
180	*/
181
182	bus_addr = (*provider->dma_map_consistent)(pdev,
183	new_irq_info->irq_xtalkaddr,
184	sizeof(new_irq_info->irq_xtalkaddr),
185	SN_DMA_MSI\|SN_DMA_ADDR_XIO);
186
187	sn_msi_info[vector].pci_addr = bus_addr;
188	*addr_hi = (u32)(bus_addr >> 32);
189	*addr_lo = (u32)(bus_addr & 0x00000000ffffffff);
190	}
191
192	struct msi_ops sn_msi_ops = {
193	.setup = sn_msi_setup,
194	.teardown = sn_msi_teardown,
195	#ifdef CONFIG_SMP
196	.target = sn_msi_target,
197	#endif
198	};
199
200	int
201	sn_msi_init(void)
202	{
203	sn_msi_info =
204	kzalloc(sizeof(struct sn_msi_info) * NR_VECTORS, GFP_KERNEL);
205	if (! sn_msi_info)
206	return -ENOMEM;
207
208	msi_register(&sn_msi_ops);
209	return 0;
fd58e55f	210	}