Mark Maule | fd58e55 | 2006-04-10 21:17:48 -0500 | [diff] [blame] | 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 | |
Mark Maule | 83821d3 | 2006-04-14 16:03:54 -0500 | [diff] [blame] | 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 | } |
| 63 | |
| 64 | int |
| 65 | sn_msi_setup(struct pci_dev *pdev, unsigned int vector, |
| 66 | u32 *addr_hi, u32 *addr_lo, u32 *data) |
| 67 | { |
| 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 | |
| 109 | /* |
| 110 | * Map the xio address into bus space |
| 111 | */ |
| 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 | }; |
Mark Maule | fd58e55 | 2006-04-10 21:17:48 -0500 | [diff] [blame] | 199 | |
| 200 | int |
| 201 | sn_msi_init(void) |
| 202 | { |
Mark Maule | 83821d3 | 2006-04-14 16:03:54 -0500 | [diff] [blame] | 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; |
Mark Maule | fd58e55 | 2006-04-10 21:17:48 -0500 | [diff] [blame] | 210 | } |