2 * Volume Management Device driver
3 * Copyright (c) 2015, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 #include <linux/device.h>
16 #include <linux/interrupt.h>
17 #include <linux/irq.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/msi.h>
21 #include <linux/pci.h>
22 #include <linux/rculist.h>
23 #include <linux/rcupdate.h>
25 #include <asm/irqdomain.h>
26 #include <asm/device.h>
28 #include <asm/msidef.h>
35 * Lock for manipulating VMD IRQ lists.
37 static DEFINE_RAW_SPINLOCK(list_lock
);
40 * struct vmd_irq - private data to map driver IRQ to the VMD shared vector
41 * @node: list item for parent traversal.
42 * @rcu: RCU callback item for freeing.
43 * @irq: back pointer to parent.
44 * @enabled: true if driver enabled IRQ
45 * @virq: the virtual IRQ value provided to the requesting driver.
47 * Every MSI/MSI-X IRQ requested for a device in a VMD domain will be mapped to
48 * a VMD IRQ using this structure.
51 struct list_head node
;
53 struct vmd_irq_list
*irq
;
59 * struct vmd_irq_list - list of driver requested IRQs mapping to a VMD vector
60 * @irq_list: the list of irq's the VMD one demuxes to.
61 * @vmd_vector: the h/w IRQ assigned to the VMD.
62 * @index: index into the VMD MSI-X table; used for message routing.
63 * @count: number of child IRQs assigned to this vector; used to track
67 struct list_head irq_list
;
69 unsigned int vmd_vector
;
81 struct msix_entry
*msix_entries
;
82 struct vmd_irq_list
*irqs
;
84 struct pci_sysdata sysdata
;
85 struct resource resources
[3];
86 struct irq_domain
*irq_domain
;
89 #ifdef CONFIG_X86_DEV_DMA_OPS
90 struct dma_map_ops dma_ops
;
91 struct dma_domain dma_domain
;
95 static inline struct vmd_dev
*vmd_from_bus(struct pci_bus
*bus
)
97 return container_of(bus
->sysdata
, struct vmd_dev
, sysdata
);
101 * Drivers managing a device in a VMD domain allocate their own IRQs as before,
102 * but the MSI entry for the hardware it's driving will be programmed with a
103 * destination ID for the VMD MSI-X table. The VMD muxes interrupts in its
104 * domain into one of its own, and the VMD driver de-muxes these for the
105 * handlers sharing that VMD IRQ. The vmd irq_domain provides the operations
106 * and irq_chip to set this up.
108 static void vmd_compose_msi_msg(struct irq_data
*data
, struct msi_msg
*msg
)
110 struct vmd_irq
*vmdirq
= data
->chip_data
;
111 struct vmd_irq_list
*irq
= vmdirq
->irq
;
113 msg
->address_hi
= MSI_ADDR_BASE_HI
;
114 msg
->address_lo
= MSI_ADDR_BASE_LO
| MSI_ADDR_DEST_ID(irq
->index
);
119 * We rely on MSI_FLAG_USE_DEF_CHIP_OPS to set the IRQ mask/unmask ops.
121 static void vmd_irq_enable(struct irq_data
*data
)
123 struct vmd_irq
*vmdirq
= data
->chip_data
;
126 raw_spin_lock_irqsave(&list_lock
, flags
);
127 WARN_ON(vmdirq
->enabled
);
128 list_add_tail_rcu(&vmdirq
->node
, &vmdirq
->irq
->irq_list
);
129 vmdirq
->enabled
= true;
130 raw_spin_unlock_irqrestore(&list_lock
, flags
);
132 data
->chip
->irq_unmask(data
);
135 static void vmd_irq_disable(struct irq_data
*data
)
137 struct vmd_irq
*vmdirq
= data
->chip_data
;
140 data
->chip
->irq_mask(data
);
142 raw_spin_lock_irqsave(&list_lock
, flags
);
143 if (vmdirq
->enabled
) {
144 list_del_rcu(&vmdirq
->node
);
145 vmdirq
->enabled
= false;
147 raw_spin_unlock_irqrestore(&list_lock
, flags
);
151 * XXX: Stubbed until we develop acceptable way to not create conflicts with
152 * other devices sharing the same vector.
154 static int vmd_irq_set_affinity(struct irq_data
*data
,
155 const struct cpumask
*dest
, bool force
)
160 static struct irq_chip vmd_msi_controller
= {
162 .irq_enable
= vmd_irq_enable
,
163 .irq_disable
= vmd_irq_disable
,
164 .irq_compose_msi_msg
= vmd_compose_msi_msg
,
165 .irq_set_affinity
= vmd_irq_set_affinity
,
168 static irq_hw_number_t
vmd_get_hwirq(struct msi_domain_info
*info
,
169 msi_alloc_info_t
*arg
)
175 * XXX: We can be even smarter selecting the best IRQ once we solve the
178 static struct vmd_irq_list
*vmd_next_irq(struct vmd_dev
*vmd
, struct msi_desc
*desc
)
183 if (!desc
->msi_attrib
.is_msix
|| vmd
->msix_count
== 1)
184 return &vmd
->irqs
[0];
186 raw_spin_lock_irqsave(&list_lock
, flags
);
187 for (i
= 1; i
< vmd
->msix_count
; i
++)
188 if (vmd
->irqs
[i
].count
< vmd
->irqs
[best
].count
)
190 vmd
->irqs
[best
].count
++;
191 raw_spin_unlock_irqrestore(&list_lock
, flags
);
193 return &vmd
->irqs
[best
];
196 static int vmd_msi_init(struct irq_domain
*domain
, struct msi_domain_info
*info
,
197 unsigned int virq
, irq_hw_number_t hwirq
,
198 msi_alloc_info_t
*arg
)
200 struct msi_desc
*desc
= arg
->desc
;
201 struct vmd_dev
*vmd
= vmd_from_bus(msi_desc_to_pci_dev(desc
)->bus
);
202 struct vmd_irq
*vmdirq
= kzalloc(sizeof(*vmdirq
), GFP_KERNEL
);
207 INIT_LIST_HEAD(&vmdirq
->node
);
208 vmdirq
->irq
= vmd_next_irq(vmd
, desc
);
211 irq_domain_set_info(domain
, virq
, vmdirq
->irq
->vmd_vector
, info
->chip
,
212 vmdirq
, handle_untracked_irq
, vmd
, NULL
);
216 static void vmd_msi_free(struct irq_domain
*domain
,
217 struct msi_domain_info
*info
, unsigned int virq
)
219 struct vmd_irq
*vmdirq
= irq_get_chip_data(virq
);
222 /* XXX: Potential optimization to rebalance */
223 raw_spin_lock_irqsave(&list_lock
, flags
);
224 vmdirq
->irq
->count
--;
225 raw_spin_unlock_irqrestore(&list_lock
, flags
);
227 kfree_rcu(vmdirq
, rcu
);
230 static int vmd_msi_prepare(struct irq_domain
*domain
, struct device
*dev
,
231 int nvec
, msi_alloc_info_t
*arg
)
233 struct pci_dev
*pdev
= to_pci_dev(dev
);
234 struct vmd_dev
*vmd
= vmd_from_bus(pdev
->bus
);
236 if (nvec
> vmd
->msix_count
)
237 return vmd
->msix_count
;
239 memset(arg
, 0, sizeof(*arg
));
243 static void vmd_set_desc(msi_alloc_info_t
*arg
, struct msi_desc
*desc
)
248 static struct msi_domain_ops vmd_msi_domain_ops
= {
249 .get_hwirq
= vmd_get_hwirq
,
250 .msi_init
= vmd_msi_init
,
251 .msi_free
= vmd_msi_free
,
252 .msi_prepare
= vmd_msi_prepare
,
253 .set_desc
= vmd_set_desc
,
256 static struct msi_domain_info vmd_msi_domain_info
= {
257 .flags
= MSI_FLAG_USE_DEF_DOM_OPS
| MSI_FLAG_USE_DEF_CHIP_OPS
|
259 .ops
= &vmd_msi_domain_ops
,
260 .chip
= &vmd_msi_controller
,
263 #ifdef CONFIG_X86_DEV_DMA_OPS
265 * VMD replaces the requester ID with its own. DMA mappings for devices in a
266 * VMD domain need to be mapped for the VMD, not the device requiring
269 static struct device
*to_vmd_dev(struct device
*dev
)
271 struct pci_dev
*pdev
= to_pci_dev(dev
);
272 struct vmd_dev
*vmd
= vmd_from_bus(pdev
->bus
);
274 return &vmd
->dev
->dev
;
277 static struct dma_map_ops
*vmd_dma_ops(struct device
*dev
)
279 return get_dma_ops(to_vmd_dev(dev
));
282 static void *vmd_alloc(struct device
*dev
, size_t size
, dma_addr_t
*addr
,
283 gfp_t flag
, unsigned long attrs
)
285 return vmd_dma_ops(dev
)->alloc(to_vmd_dev(dev
), size
, addr
, flag
,
289 static void vmd_free(struct device
*dev
, size_t size
, void *vaddr
,
290 dma_addr_t addr
, unsigned long attrs
)
292 return vmd_dma_ops(dev
)->free(to_vmd_dev(dev
), size
, vaddr
, addr
,
296 static int vmd_mmap(struct device
*dev
, struct vm_area_struct
*vma
,
297 void *cpu_addr
, dma_addr_t addr
, size_t size
,
300 return vmd_dma_ops(dev
)->mmap(to_vmd_dev(dev
), vma
, cpu_addr
, addr
,
304 static int vmd_get_sgtable(struct device
*dev
, struct sg_table
*sgt
,
305 void *cpu_addr
, dma_addr_t addr
, size_t size
,
308 return vmd_dma_ops(dev
)->get_sgtable(to_vmd_dev(dev
), sgt
, cpu_addr
,
312 static dma_addr_t
vmd_map_page(struct device
*dev
, struct page
*page
,
313 unsigned long offset
, size_t size
,
314 enum dma_data_direction dir
,
317 return vmd_dma_ops(dev
)->map_page(to_vmd_dev(dev
), page
, offset
, size
,
321 static void vmd_unmap_page(struct device
*dev
, dma_addr_t addr
, size_t size
,
322 enum dma_data_direction dir
, unsigned long attrs
)
324 vmd_dma_ops(dev
)->unmap_page(to_vmd_dev(dev
), addr
, size
, dir
, attrs
);
327 static int vmd_map_sg(struct device
*dev
, struct scatterlist
*sg
, int nents
,
328 enum dma_data_direction dir
, unsigned long attrs
)
330 return vmd_dma_ops(dev
)->map_sg(to_vmd_dev(dev
), sg
, nents
, dir
, attrs
);
333 static void vmd_unmap_sg(struct device
*dev
, struct scatterlist
*sg
, int nents
,
334 enum dma_data_direction dir
, unsigned long attrs
)
336 vmd_dma_ops(dev
)->unmap_sg(to_vmd_dev(dev
), sg
, nents
, dir
, attrs
);
339 static void vmd_sync_single_for_cpu(struct device
*dev
, dma_addr_t addr
,
340 size_t size
, enum dma_data_direction dir
)
342 vmd_dma_ops(dev
)->sync_single_for_cpu(to_vmd_dev(dev
), addr
, size
, dir
);
345 static void vmd_sync_single_for_device(struct device
*dev
, dma_addr_t addr
,
346 size_t size
, enum dma_data_direction dir
)
348 vmd_dma_ops(dev
)->sync_single_for_device(to_vmd_dev(dev
), addr
, size
,
352 static void vmd_sync_sg_for_cpu(struct device
*dev
, struct scatterlist
*sg
,
353 int nents
, enum dma_data_direction dir
)
355 vmd_dma_ops(dev
)->sync_sg_for_cpu(to_vmd_dev(dev
), sg
, nents
, dir
);
358 static void vmd_sync_sg_for_device(struct device
*dev
, struct scatterlist
*sg
,
359 int nents
, enum dma_data_direction dir
)
361 vmd_dma_ops(dev
)->sync_sg_for_device(to_vmd_dev(dev
), sg
, nents
, dir
);
364 static int vmd_mapping_error(struct device
*dev
, dma_addr_t addr
)
366 return vmd_dma_ops(dev
)->mapping_error(to_vmd_dev(dev
), addr
);
369 static int vmd_dma_supported(struct device
*dev
, u64 mask
)
371 return vmd_dma_ops(dev
)->dma_supported(to_vmd_dev(dev
), mask
);
374 #ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
375 static u64
vmd_get_required_mask(struct device
*dev
)
377 return vmd_dma_ops(dev
)->get_required_mask(to_vmd_dev(dev
));
381 static void vmd_teardown_dma_ops(struct vmd_dev
*vmd
)
383 struct dma_domain
*domain
= &vmd
->dma_domain
;
385 if (get_dma_ops(&vmd
->dev
->dev
))
386 del_dma_domain(domain
);
389 #define ASSIGN_VMD_DMA_OPS(source, dest, fn) \
392 dest->fn = vmd_##fn; \
395 static void vmd_setup_dma_ops(struct vmd_dev
*vmd
)
397 const struct dma_map_ops
*source
= get_dma_ops(&vmd
->dev
->dev
);
398 struct dma_map_ops
*dest
= &vmd
->dma_ops
;
399 struct dma_domain
*domain
= &vmd
->dma_domain
;
401 domain
->domain_nr
= vmd
->sysdata
.domain
;
402 domain
->dma_ops
= dest
;
406 ASSIGN_VMD_DMA_OPS(source
, dest
, alloc
);
407 ASSIGN_VMD_DMA_OPS(source
, dest
, free
);
408 ASSIGN_VMD_DMA_OPS(source
, dest
, mmap
);
409 ASSIGN_VMD_DMA_OPS(source
, dest
, get_sgtable
);
410 ASSIGN_VMD_DMA_OPS(source
, dest
, map_page
);
411 ASSIGN_VMD_DMA_OPS(source
, dest
, unmap_page
);
412 ASSIGN_VMD_DMA_OPS(source
, dest
, map_sg
);
413 ASSIGN_VMD_DMA_OPS(source
, dest
, unmap_sg
);
414 ASSIGN_VMD_DMA_OPS(source
, dest
, sync_single_for_cpu
);
415 ASSIGN_VMD_DMA_OPS(source
, dest
, sync_single_for_device
);
416 ASSIGN_VMD_DMA_OPS(source
, dest
, sync_sg_for_cpu
);
417 ASSIGN_VMD_DMA_OPS(source
, dest
, sync_sg_for_device
);
418 ASSIGN_VMD_DMA_OPS(source
, dest
, mapping_error
);
419 ASSIGN_VMD_DMA_OPS(source
, dest
, dma_supported
);
420 #ifdef ARCH_HAS_DMA_GET_REQUIRED_MASK
421 ASSIGN_VMD_DMA_OPS(source
, dest
, get_required_mask
);
423 add_dma_domain(domain
);
425 #undef ASSIGN_VMD_DMA_OPS
427 static void vmd_teardown_dma_ops(struct vmd_dev
*vmd
) {}
428 static void vmd_setup_dma_ops(struct vmd_dev
*vmd
) {}
431 static char __iomem
*vmd_cfg_addr(struct vmd_dev
*vmd
, struct pci_bus
*bus
,
432 unsigned int devfn
, int reg
, int len
)
434 char __iomem
*addr
= vmd
->cfgbar
+
435 (bus
->number
<< 20) + (devfn
<< 12) + reg
;
437 if ((addr
- vmd
->cfgbar
) + len
>=
438 resource_size(&vmd
->dev
->resource
[VMD_CFGBAR
]))
445 * CPU may deadlock if config space is not serialized on some versions of this
446 * hardware, so all config space access is done under a spinlock.
448 static int vmd_pci_read(struct pci_bus
*bus
, unsigned int devfn
, int reg
,
451 struct vmd_dev
*vmd
= vmd_from_bus(bus
);
452 char __iomem
*addr
= vmd_cfg_addr(vmd
, bus
, devfn
, reg
, len
);
459 spin_lock_irqsave(&vmd
->cfg_lock
, flags
);
462 *value
= readb(addr
);
465 *value
= readw(addr
);
468 *value
= readl(addr
);
474 spin_unlock_irqrestore(&vmd
->cfg_lock
, flags
);
479 * VMD h/w converts non-posted config writes to posted memory writes. The
480 * read-back in this function forces the completion so it returns only after
481 * the config space was written, as expected.
483 static int vmd_pci_write(struct pci_bus
*bus
, unsigned int devfn
, int reg
,
486 struct vmd_dev
*vmd
= vmd_from_bus(bus
);
487 char __iomem
*addr
= vmd_cfg_addr(vmd
, bus
, devfn
, reg
, len
);
494 spin_lock_irqsave(&vmd
->cfg_lock
, flags
);
512 spin_unlock_irqrestore(&vmd
->cfg_lock
, flags
);
516 static struct pci_ops vmd_ops
= {
517 .read
= vmd_pci_read
,
518 .write
= vmd_pci_write
,
521 static void vmd_attach_resources(struct vmd_dev
*vmd
)
523 vmd
->dev
->resource
[VMD_MEMBAR1
].child
= &vmd
->resources
[1];
524 vmd
->dev
->resource
[VMD_MEMBAR2
].child
= &vmd
->resources
[2];
527 static void vmd_detach_resources(struct vmd_dev
*vmd
)
529 vmd
->dev
->resource
[VMD_MEMBAR1
].child
= NULL
;
530 vmd
->dev
->resource
[VMD_MEMBAR2
].child
= NULL
;
534 * VMD domains start at 0x1000 to not clash with ACPI _SEG domains.
536 static int vmd_find_free_domain(void)
539 struct pci_bus
*bus
= NULL
;
541 while ((bus
= pci_find_next_bus(bus
)) != NULL
)
542 domain
= max_t(int, domain
, pci_domain_nr(bus
));
546 static int vmd_enable_domain(struct vmd_dev
*vmd
)
548 struct pci_sysdata
*sd
= &vmd
->sysdata
;
549 struct resource
*res
;
552 LIST_HEAD(resources
);
554 res
= &vmd
->dev
->resource
[VMD_CFGBAR
];
555 vmd
->resources
[0] = (struct resource
) {
556 .name
= "VMD CFGBAR",
558 .end
= (resource_size(res
) >> 20) - 1,
559 .flags
= IORESOURCE_BUS
| IORESOURCE_PCI_FIXED
,
563 * If the window is below 4GB, clear IORESOURCE_MEM_64 so we can
564 * put 32-bit resources in the window.
566 * There's no hardware reason why a 64-bit window *couldn't*
567 * contain a 32-bit resource, but pbus_size_mem() computes the
568 * bridge window size assuming a 64-bit window will contain no
569 * 32-bit resources. __pci_assign_resource() enforces that
570 * artificial restriction to make sure everything will fit.
572 * The only way we could use a 64-bit non-prefechable MEMBAR is
573 * if its address is <4GB so that we can convert it to a 32-bit
574 * resource. To be visible to the host OS, all VMD endpoints must
575 * be initially configured by platform BIOS, which includes setting
576 * up these resources. We can assume the device is configured
577 * according to the platform needs.
579 res
= &vmd
->dev
->resource
[VMD_MEMBAR1
];
580 upper_bits
= upper_32_bits(res
->end
);
581 flags
= res
->flags
& ~IORESOURCE_SIZEALIGN
;
583 flags
&= ~IORESOURCE_MEM_64
;
584 vmd
->resources
[1] = (struct resource
) {
585 .name
= "VMD MEMBAR1",
592 res
= &vmd
->dev
->resource
[VMD_MEMBAR2
];
593 upper_bits
= upper_32_bits(res
->end
);
594 flags
= res
->flags
& ~IORESOURCE_SIZEALIGN
;
596 flags
&= ~IORESOURCE_MEM_64
;
597 vmd
->resources
[2] = (struct resource
) {
598 .name
= "VMD MEMBAR2",
599 .start
= res
->start
+ 0x2000,
605 sd
->domain
= vmd_find_free_domain();
609 sd
->node
= pcibus_to_node(vmd
->dev
->bus
);
611 vmd
->irq_domain
= pci_msi_create_irq_domain(NULL
, &vmd_msi_domain_info
,
613 if (!vmd
->irq_domain
)
616 pci_add_resource(&resources
, &vmd
->resources
[0]);
617 pci_add_resource(&resources
, &vmd
->resources
[1]);
618 pci_add_resource(&resources
, &vmd
->resources
[2]);
619 vmd
->bus
= pci_create_root_bus(&vmd
->dev
->dev
, 0, &vmd_ops
, sd
,
622 pci_free_resource_list(&resources
);
623 irq_domain_remove(vmd
->irq_domain
);
627 vmd_attach_resources(vmd
);
628 vmd_setup_dma_ops(vmd
);
629 dev_set_msi_domain(&vmd
->bus
->dev
, vmd
->irq_domain
);
630 pci_rescan_bus(vmd
->bus
);
632 WARN(sysfs_create_link(&vmd
->dev
->dev
.kobj
, &vmd
->bus
->dev
.kobj
,
633 "domain"), "Can't create symlink to domain\n");
637 static irqreturn_t
vmd_irq(int irq
, void *data
)
639 struct vmd_irq_list
*irqs
= data
;
640 struct vmd_irq
*vmdirq
;
643 list_for_each_entry_rcu(vmdirq
, &irqs
->irq_list
, node
)
644 generic_handle_irq(vmdirq
->virq
);
650 static int vmd_probe(struct pci_dev
*dev
, const struct pci_device_id
*id
)
655 if (resource_size(&dev
->resource
[VMD_CFGBAR
]) < (1 << 20))
658 vmd
= devm_kzalloc(&dev
->dev
, sizeof(*vmd
), GFP_KERNEL
);
663 err
= pcim_enable_device(dev
);
667 vmd
->cfgbar
= pcim_iomap(dev
, VMD_CFGBAR
, 0);
672 if (dma_set_mask_and_coherent(&dev
->dev
, DMA_BIT_MASK(64)) &&
673 dma_set_mask_and_coherent(&dev
->dev
, DMA_BIT_MASK(32)))
676 vmd
->msix_count
= pci_msix_vec_count(dev
);
677 if (vmd
->msix_count
< 0)
680 vmd
->irqs
= devm_kcalloc(&dev
->dev
, vmd
->msix_count
, sizeof(*vmd
->irqs
),
685 vmd
->msix_entries
= devm_kcalloc(&dev
->dev
, vmd
->msix_count
,
686 sizeof(*vmd
->msix_entries
),
688 if (!vmd
->msix_entries
)
690 for (i
= 0; i
< vmd
->msix_count
; i
++)
691 vmd
->msix_entries
[i
].entry
= i
;
693 vmd
->msix_count
= pci_enable_msix_range(vmd
->dev
, vmd
->msix_entries
, 1,
695 if (vmd
->msix_count
< 0)
696 return vmd
->msix_count
;
698 for (i
= 0; i
< vmd
->msix_count
; i
++) {
699 INIT_LIST_HEAD(&vmd
->irqs
[i
].irq_list
);
700 vmd
->irqs
[i
].vmd_vector
= vmd
->msix_entries
[i
].vector
;
701 vmd
->irqs
[i
].index
= i
;
703 err
= devm_request_irq(&dev
->dev
, vmd
->irqs
[i
].vmd_vector
,
704 vmd_irq
, 0, "vmd", &vmd
->irqs
[i
]);
709 spin_lock_init(&vmd
->cfg_lock
);
710 pci_set_drvdata(dev
, vmd
);
711 err
= vmd_enable_domain(vmd
);
715 dev_info(&vmd
->dev
->dev
, "Bound to PCI domain %04x\n",
716 vmd
->sysdata
.domain
);
720 static void vmd_remove(struct pci_dev
*dev
)
722 struct vmd_dev
*vmd
= pci_get_drvdata(dev
);
724 vmd_detach_resources(vmd
);
725 pci_set_drvdata(dev
, NULL
);
726 sysfs_remove_link(&vmd
->dev
->dev
.kobj
, "domain");
727 pci_stop_root_bus(vmd
->bus
);
728 pci_remove_root_bus(vmd
->bus
);
729 vmd_teardown_dma_ops(vmd
);
730 irq_domain_remove(vmd
->irq_domain
);
734 static int vmd_suspend(struct device
*dev
)
736 struct pci_dev
*pdev
= to_pci_dev(dev
);
738 pci_save_state(pdev
);
742 static int vmd_resume(struct device
*dev
)
744 struct pci_dev
*pdev
= to_pci_dev(dev
);
746 pci_restore_state(pdev
);
750 static SIMPLE_DEV_PM_OPS(vmd_dev_pm_ops
, vmd_suspend
, vmd_resume
);
752 static const struct pci_device_id vmd_ids
[] = {
753 {PCI_DEVICE(PCI_VENDOR_ID_INTEL
, 0x201d),},
756 MODULE_DEVICE_TABLE(pci
, vmd_ids
);
758 static struct pci_driver vmd_drv
= {
762 .remove
= vmd_remove
,
764 .pm
= &vmd_dev_pm_ops
,
767 module_pci_driver(vmd_drv
);
769 MODULE_AUTHOR("Intel Corporation");
770 MODULE_LICENSE("GPL v2");
771 MODULE_VERSION("0.6");