diff options
| -rw-r--r-- | drivers/pci/msi.c | 425 | ||||
| -rw-r--r-- | drivers/pci/msi.h | 7 |
2 files changed, 168 insertions, 264 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index a32e75a4417..da2c6c2b6b1 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -6,6 +6,7 @@ * Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com) */ +#include <linux/err.h> #include <linux/mm.h> #include <linux/irq.h> #include <linux/interrupt.h> @@ -27,12 +28,6 @@ static struct msi_desc* msi_desc[NR_IRQS] = { [0 ... NR_IRQS-1] = NULL }; static kmem_cache_t* msi_cachep; static int pci_msi_enable = 1; -static int last_alloc_vector; -static int nr_released_vectors; - -#ifndef CONFIG_X86_IO_APIC -int vector_irq[NR_VECTORS] = { [0 ... NR_VECTORS - 1] = -1}; -#endif static struct msi_ops *msi_ops; @@ -53,11 +48,11 @@ static int msi_cache_init(void) return 0; } -static void msi_set_mask_bit(unsigned int vector, int flag) +static void msi_set_mask_bit(unsigned int irq, int flag) { struct msi_desc *entry; - entry = (struct msi_desc *)msi_desc[vector]; + entry = msi_desc[irq]; if (!entry || !entry->dev || !entry->mask_base) return; switch (entry->msi_attrib.type) { @@ -181,23 +176,23 @@ static void set_msi_affinity(unsigned int irq, cpumask_t cpu_mask) #define set_msi_affinity NULL #endif /* CONFIG_SMP */ -static void mask_MSI_irq(unsigned int vector) +static void mask_MSI_irq(unsigned int irq) { - msi_set_mask_bit(vector, 1); + msi_set_mask_bit(irq, 1); } -static void unmask_MSI_irq(unsigned int vector) +static void unmask_MSI_irq(unsigned int irq) { - msi_set_mask_bit(vector, 0); + msi_set_mask_bit(irq, 0); } -static unsigned int startup_msi_irq_wo_maskbit(unsigned int vector) +static unsigned int startup_msi_irq_wo_maskbit(unsigned int irq) { struct msi_desc *entry; unsigned long flags; spin_lock_irqsave(&msi_lock, flags); - entry = msi_desc[vector]; + entry = msi_desc[irq]; if (!entry || !entry->dev) { spin_unlock_irqrestore(&msi_lock, flags); return 0; @@ -208,39 +203,39 @@ static unsigned int startup_msi_irq_wo_maskbit(unsigned int vector) return 0; /* never anything pending */ } -static unsigned int startup_msi_irq_w_maskbit(unsigned int vector) +static unsigned int startup_msi_irq_w_maskbit(unsigned int irq) { - startup_msi_irq_wo_maskbit(vector); - unmask_MSI_irq(vector); + startup_msi_irq_wo_maskbit(irq); + unmask_MSI_irq(irq); return 0; /* never anything pending */ } -static void shutdown_msi_irq(unsigned int vector) +static void shutdown_msi_irq(unsigned int irq) { struct msi_desc *entry; unsigned long flags; spin_lock_irqsave(&msi_lock, flags); - entry = msi_desc[vector]; + entry = msi_desc[irq]; if (entry && entry->dev) entry->msi_attrib.state = 0; /* Mark it not active */ spin_unlock_irqrestore(&msi_lock, flags); } -static void end_msi_irq_wo_maskbit(unsigned int vector) +static void end_msi_irq_wo_maskbit(unsigned int irq) { - move_native_irq(vector); + move_native_irq(irq); ack_APIC_irq(); } -static void end_msi_irq_w_maskbit(unsigned int vector) +static void end_msi_irq_w_maskbit(unsigned int irq) { - move_native_irq(vector); - unmask_MSI_irq(vector); + move_native_irq(irq); + unmask_MSI_irq(irq); ack_APIC_irq(); } -static void do_nothing(unsigned int vector) +static void do_nothing(unsigned int irq) { } @@ -291,86 +286,7 @@ static struct hw_interrupt_type msi_irq_wo_maskbit_type = { .set_affinity = set_msi_affinity }; -static int msi_free_vector(struct pci_dev* dev, int vector, int reassign); -static int assign_msi_vector(void) -{ - static int new_vector_avail = 1; - int vector; - unsigned long flags; - - /* - * msi_lock is provided to ensure that successful allocation of MSI - * vector is assigned unique among drivers. - */ - spin_lock_irqsave(&msi_lock, flags); - - if (!new_vector_avail) { - int free_vector = 0; - - /* - * vector_irq[] = -1 indicates that this specific vector is: - * - assigned for MSI (since MSI have no associated IRQ) or - * - assigned for legacy if less than 16, or - * - having no corresponding 1:1 vector-to-IOxAPIC IRQ mapping - * vector_irq[] = 0 indicates that this vector, previously - * assigned for MSI, is freed by hotplug removed operations. - * This vector will be reused for any subsequent hotplug added - * operations. - * vector_irq[] > 0 indicates that this vector is assigned for - * IOxAPIC IRQs. This vector and its value provides a 1-to-1 - * vector-to-IOxAPIC IRQ mapping. - */ - for (vector = FIRST_DEVICE_VECTOR; vector < NR_IRQS; vector++) { - if (vector_irq[vector] != 0) - continue; - free_vector = vector; - if (!msi_desc[vector]) - break; - else - continue; - } - if (!free_vector) { - spin_unlock_irqrestore(&msi_lock, flags); - return -EBUSY; - } - vector_irq[free_vector] = -1; - nr_released_vectors--; - spin_unlock_irqrestore(&msi_lock, flags); - if (msi_desc[free_vector] != NULL) { - struct pci_dev *dev; - int tail; - - /* free all linked vectors before re-assign */ - do { - spin_lock_irqsave(&msi_lock, flags); - dev = msi_desc[free_vector]->dev; - tail = msi_desc[free_vector]->link.tail; - spin_unlock_irqrestore(&msi_lock, flags); - msi_free_vector(dev, tail, 1); - } while (free_vector != tail); - } - - return free_vector; - } - vector = assign_irq_vector(AUTO_ASSIGN); - last_alloc_vector = vector; - if (vector == LAST_DEVICE_VECTOR) - new_vector_avail = 0; - - spin_unlock_irqrestore(&msi_lock, flags); - return vector; -} - -static int get_new_vector(void) -{ - int vector = assign_msi_vector(); - - if (vector > 0) - set_intr_gate(vector, interrupt[vector]); - - return vector; -} - +static int msi_free_irq(struct pci_dev* dev, int irq); static int msi_init(void) { static int status = -ENOMEM; @@ -394,13 +310,13 @@ static int msi_init(void) } if (! msi_ops) { + pci_msi_enable = 0; printk(KERN_WARNING "PCI: MSI ops not registered. MSI disabled.\n"); status = -EINVAL; return status; } - last_alloc_vector = assign_irq_vector(AUTO_ASSIGN); status = msi_cache_init(); if (status < 0) { pci_msi_enable = 0; @@ -408,23 +324,9 @@ static int msi_init(void) return status; } - if (last_alloc_vector < 0) { - pci_msi_enable = 0; - printk(KERN_WARNING "PCI: No interrupt vectors available for MSI\n"); - status = -EBUSY; - return status; - } - vector_irq[last_alloc_vector] = 0; - nr_released_vectors++; - return status; } -static int get_msi_vector(struct pci_dev *dev) -{ - return get_new_vector(); -} - static struct msi_desc* alloc_msi_entry(void) { struct msi_desc *entry; @@ -439,29 +341,45 @@ static struct msi_desc* alloc_msi_entry(void) return entry; } -static void attach_msi_entry(struct msi_desc *entry, int vector) +static void attach_msi_entry(struct msi_desc *entry, int irq) { unsigned long flags; spin_lock_irqsave(&msi_lock, flags); - msi_desc[vector] = entry; + msi_desc[irq] = entry; spin_unlock_irqrestore(&msi_lock, flags); } -static void irq_handler_init(int cap_id, int pos, int mask) +static int create_msi_irq(struct hw_interrupt_type *handler) { - unsigned long flags; + struct msi_desc *entry; + int irq; + + entry = alloc_msi_entry(); + if (!entry) + return -ENOMEM; - spin_lock_irqsave(&irq_desc[pos].lock, flags); - if (cap_id == PCI_CAP_ID_MSIX) - irq_desc[pos].chip = &msix_irq_type; - else { - if (!mask) - irq_desc[pos].chip = &msi_irq_wo_maskbit_type; - else - irq_desc[pos].chip = &msi_irq_w_maskbit_type; + irq = create_irq(); + if (irq < 0) { + kmem_cache_free(msi_cachep, entry); + return -EBUSY; } - spin_unlock_irqrestore(&irq_desc[pos].lock, flags); + + set_irq_chip(irq, handler); + set_irq_data(irq, entry); + + return irq; +} + +static void destroy_msi_irq(unsigned int irq) +{ + struct msi_desc *entry; + + entry = get_irq_data(irq); + set_irq_chip(irq, NULL); + set_irq_data(irq, NULL); + destroy_irq(irq); + kmem_cache_free(msi_cachep, entry); } static void enable_msi_mode(struct pci_dev *dev, int pos, int type) @@ -506,21 +424,21 @@ void disable_msi_mode(struct pci_dev *dev, int pos, int type) } } -static int msi_lookup_vector(struct pci_dev *dev, int type) +static int msi_lookup_irq(struct pci_dev *dev, int type) { - int vector; + int irq; unsigned long flags; spin_lock_irqsave(&msi_lock, flags); - for (vector = FIRST_DEVICE_VECTOR; vector < NR_IRQS; vector++) { - if (!msi_desc[vector] || msi_desc[vector]->dev != dev || - msi_desc[vector]->msi_attrib.type != type || - msi_desc[vector]->msi_attrib.default_vector != dev->irq) + for (irq = 0; irq < NR_IRQS; irq++) { + if (!msi_desc[irq] || msi_desc[irq]->dev != dev || + msi_desc[irq]->msi_attrib.type != type || + msi_desc[irq]->msi_attrib.default_irq != dev->irq) continue; spin_unlock_irqrestore(&msi_lock, flags); - /* This pre-assigned MSI vector for this device - already exits. Override dev->irq with this vector */ - dev->irq = vector; + /* This pre-assigned MSI irq for this device + already exits. Override dev->irq with this irq */ + dev->irq = irq; return 0; } spin_unlock_irqrestore(&msi_lock, flags); @@ -605,7 +523,7 @@ int pci_save_msix_state(struct pci_dev *dev) { int pos; int temp; - int vector, head, tail = 0; + int irq, head, tail = 0; u16 control; struct pci_cap_saved_state *save_state; @@ -627,20 +545,20 @@ int pci_save_msix_state(struct pci_dev *dev) /* save the table */ temp = dev->irq; - if (msi_lookup_vector(dev, PCI_CAP_ID_MSIX)) { + if (msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) { kfree(save_state); return -EINVAL; } - vector = head = dev->irq; + irq = head = dev->irq; while (head != tail) { struct msi_desc *entry; - entry = msi_desc[vector]; + entry = msi_desc[irq]; read_msi_msg(entry, &entry->msg_save); - tail = msi_desc[vector]->link.tail; - vector = tail; + tail = msi_desc[irq]->link.tail; + irq = tail; } dev->irq = temp; @@ -653,7 +571,7 @@ void pci_restore_msix_state(struct pci_dev *dev) { u16 save; int pos; - int vector, head, tail = 0; + int irq, head, tail = 0; struct msi_desc *entry; int temp; struct pci_cap_saved_state *save_state; @@ -671,15 +589,15 @@ void pci_restore_msix_state(struct pci_dev *dev) /* route the table */ temp = dev->irq; - if (msi_lookup_vector(dev, PCI_CAP_ID_MSIX)) + if (msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) return; - vector = head = dev->irq; + irq = head = dev->irq; while (head != tail) { - entry = msi_desc[vector]; + entry = msi_desc[irq]; write_msi_msg(entry, &entry->msg_save); - tail = msi_desc[vector]->link.tail; - vector = tail; + tail = msi_desc[irq]->link.tail; + irq = tail; } dev->irq = temp; @@ -726,55 +644,54 @@ static int msi_register_init(struct pci_dev *dev, struct msi_desc *entry) * @dev: pointer to the pci_dev data structure of MSI device function * * Setup the MSI capability structure of device function with a single - * MSI vector, regardless of device function is capable of handling + * MSI irq, regardless of device function is capable of handling * multiple messages. A return of zero indicates the successful setup - * of an entry zero with the new MSI vector or non-zero for otherwise. + * of an entry zero with the new MSI irq or non-zero for otherwise. **/ static int msi_capability_init(struct pci_dev *dev) { int status; struct msi_desc *entry; - int pos, vector; + int pos, irq; u16 control; + struct hw_interrupt_type *handler; pos = pci_find_capability(dev, PCI_CAP_ID_MSI); pci_read_config_word(dev, msi_control_reg(pos), &control); /* MSI Entry Initialization */ - entry = alloc_msi_entry(); - if (!entry) - return -ENOMEM; + handler = &msi_irq_wo_maskbit_type; + if (is_mask_bit_support(control)) + handler = &msi_irq_w_maskbit_type; - vector = get_msi_vector(dev); - if (vector < 0) { - kmem_cache_free(msi_cachep, entry); - return -EBUSY; - } - entry->link.head = vector; - entry->link.tail = vector; + irq = create_msi_irq(handler); + if (irq < 0) + return irq; + + entry = get_irq_data(irq); + entry->link.head = irq; + entry->link.tail = irq; entry->msi_attrib.type = PCI_CAP_ID_MSI; entry->msi_attrib.state = 0; /* Mark it not active */ entry->msi_attrib.is_64 = is_64bit_address(control); entry->msi_attrib.entry_nr = 0; entry->msi_attrib.maskbit = is_mask_bit_support(control); - entry->msi_attrib.default_vector = dev->irq; /* Save IOAPIC IRQ */ + entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */ entry->msi_attrib.pos = pos; - dev->irq = vector; + dev->irq = irq; entry->dev = dev; if (is_mask_bit_support(control)) { entry->mask_base = (void __iomem *)(long)msi_mask_bits_reg(pos, is_64bit_address(control)); } - /* Replace with MSI handler */ - irq_handler_init(PCI_CAP_ID_MSI, vector, entry->msi_attrib.maskbit); /* Configure MSI capability structure */ status = msi_register_init(dev, entry); if (status != 0) { - dev->irq = entry->msi_attrib.default_vector; - kmem_cache_free(msi_cachep, entry); + dev->irq = entry->msi_attrib.default_irq; + destroy_msi_irq(irq); return status; } - attach_msi_entry(entry, vector); + attach_msi_entry(entry, irq); /* Set MSI enabled bits */ enable_msi_mode(dev, pos, PCI_CAP_ID_MSI); @@ -788,8 +705,8 @@ static int msi_capability_init(struct pci_dev *dev) * @nvec: number of @entries * * Setup the MSI-X capability structure of device function with a - * single MSI-X vector. A return of zero indicates the successful setup of - * requested MSI-X entries with allocated vectors or non-zero for otherwise. + * single MSI-X irq. A return of zero indicates the successful setup of + * requested MSI-X entries with allocated irqs or non-zero for otherwise. **/ static int msix_capability_init(struct pci_dev *dev, struct msix_entry *entries, int nvec) @@ -797,7 +714,7 @@ static int msix_capability_init(struct pci_dev *dev, struct msi_desc *head = NULL, *tail = NULL, *entry = NULL; struct msi_msg msg; int status; - int vector, pos, i, j, nr_entries, temp = 0; + int irq, pos, i, j, nr_entries, temp = 0; unsigned long phys_addr; u32 table_offset; u16 control; @@ -819,54 +736,50 @@ static int msix_capability_init(struct pci_dev *dev, /* MSI-X Table Initialization */ for (i = 0; i < nvec; i++) { - entry = alloc_msi_entry(); - if (!entry) + irq = create_msi_irq(&msix_irq_type); + if (irq < 0) break; - vector = get_msi_vector(dev); - if (vector < 0) { - kmem_cache_free(msi_cachep, entry); - break; - } + entry = get_irq_data(irq); j = entries[i].entry; - entries[i].vector = vector; + entries[i].vector = irq; entry->msi_attrib.type = PCI_CAP_ID_MSIX; entry->msi_attrib.state = 0; /* Mark it not active */ entry->msi_attrib.is_64 = 1; entry->msi_attrib.entry_nr = j; entry->msi_attrib.maskbit = 1; - entry->msi_attrib.default_vector = dev->irq; + entry->msi_attrib.default_irq = dev->irq; entry->msi_attrib.pos = pos; entry->dev = dev; entry->mask_base = base; if (!head) { - entry->link.head = vector; - entry->link.tail = vector; + entry->link.head = irq; + entry->link.tail = irq; head = entry; } else { entry->link.head = temp; entry->link.tail = tail->link.tail; - tail->link.tail = vector; - head->link.head = vector; + tail->link.tail = irq; + head->link.head = irq; } - temp = vector; + temp = irq; tail = entry; - /* Replace with MSI-X handler */ - irq_handler_init(PCI_CAP_ID_MSIX, vector, 1); /* Configure MSI-X capability structure */ - status = msi_ops->setup(dev, vector, &msg); - if (status < 0) + status = msi_ops->setup(dev, irq, &msg); + if (status < 0) { + destroy_msi_irq(irq); break; + } write_msi_msg(entry, &msg); - attach_msi_entry(entry, vector); + attach_msi_entry(entry, irq); } if (i != nvec) { int avail = i - 1; i--; for (; i >= 0; i--) { - vector = (entries + i)->vector; - msi_free_vector(dev, vector, 0); + irq = (entries + i)->vector; + msi_free_irq(dev, irq); (entries + i)->vector = 0; } /* If we had some success report the number of irqs @@ -914,10 +827,10 @@ int pci_msi_supported(struct pci_dev * dev) * @dev: pointer to the pci_dev data structure of MSI device function * * Setup the MSI capability structure of device function with - * a single MSI vector upon its software driver call to request for + * a single MSI irq upon its software driver call to request for * MSI mode enabled on its hardware device function. A return of zero * indicates the successful setup of an entry zero with the new MSI - * vector or non-zero for otherwise. + * irq or non-zero for otherwise. **/ int pci_enable_msi(struct pci_dev* dev) { @@ -941,13 +854,13 @@ int pci_enable_msi(struct pci_dev* dev) if (!is_64bit_address(control) && msi_ops->needs_64bit_address) return -EINVAL; - WARN_ON(!msi_lookup_vector(dev, PCI_CAP_ID_MSI)); + WARN_ON(!msi_lookup_irq(dev, PCI_CAP_ID_MSI)); - /* Check whether driver already requested for MSI-X vectors */ + /* Check whether driver already requested for MSI-X irqs */ pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); - if (pos > 0 && !msi_lookup_vector(dev, PCI_CAP_ID_MSIX)) { + if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) { printk(KERN_INFO "PCI: %s: Can't enable MSI. " - "Device already has MSI-X vectors assigned\n", + "Device already has MSI-X irq assigned\n", pci_name(dev)); dev->irq = temp; return -EINVAL; @@ -959,7 +872,7 @@ int pci_enable_msi(struct pci_dev* dev) void pci_disable_msi(struct pci_dev* dev) { struct msi_desc *entry; - int pos, default_vector; + int pos, default_irq; u16 control; unsigned long flags; @@ -987,30 +900,30 @@ void pci_disable_msi(struct pci_dev* dev) if (entry->msi_attrib.state) { spin_unlock_irqrestore(&msi_lock, flags); printk(KERN_WARNING "PCI: %s: pci_disable_msi() called without " - "free_irq() on MSI vector %d\n", + "free_irq() on MSI irq %d\n", pci_name(dev), dev->irq); BUG_ON(entry->msi_attrib.state > 0); } else { - default_vector = entry->msi_attrib.default_vector; + default_irq = entry->msi_attrib.default_irq; spin_unlock_irqrestore(&msi_lock, flags); - msi_free_vector(dev, dev->irq, 0); + msi_free_irq(dev, dev->irq); - /* Restore dev->irq to its default pin-assertion vector */ - dev->irq = default_vector; + /* Restore dev->irq to its default pin-assertion irq */ + dev->irq = default_irq; } } -static int msi_free_vector(struct pci_dev* dev, int vector, int reassign) +static int msi_free_irq(struct pci_dev* dev, int irq) { struct msi_desc *entry; int head, entry_nr, type; void __iomem *base; unsigned long flags; - msi_ops->teardown(vector); + msi_ops->teardown(irq); spin_lock_irqsave(&msi_lock, flags); - entry = msi_desc[vector]; + entry = msi_desc[irq]; if (!entry || entry->dev != dev) { spin_unlock_irqrestore(&msi_lock, flags); return -EINVAL; @@ -1022,22 +935,16 @@ static int msi_free_vector(struct pci_dev* dev, int vector, int reassign) msi_desc[entry->link.head]->link.tail = entry->link.tail; msi_desc[entry->link.tail]->link.head = entry->link.head; entry->dev = NULL; - if (!reassign) { - vector_irq[vector] = 0; - nr_released_vectors++; - } - msi_desc[vector] = NULL; + msi_desc[irq] = NULL; spin_unlock_irqrestore(&msi_lock, flags); - kmem_cache_free(msi_cachep, entry); + destroy_msi_irq(irq); if (type == PCI_CAP_ID_MSIX) { - if (!reassign) - writel(1, base + - entry_nr * PCI_MSIX_ENTRY_SIZE + - PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET); + writel(1, base + entry_nr * PCI_MSIX_ENTRY_SIZE + + PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET); - if (head == vector) + if (head == irq) iounmap(base); } @@ -1048,15 +955,15 @@ static int msi_free_vector(struct pci_dev* dev, int vector, int reassign) * pci_enable_msix - configure device's MSI-X capability structure * @dev: pointer to the pci_dev data structure of MSI-X device function * @entries: pointer to an array of MSI-X entries - * @nvec: number of MSI-X vectors requested for allocation by device driver + * @nvec: number of MSI-X irqs requested for allocation by device driver * * Setup the MSI-X capability structure of device function with the number - * of requested vectors upon its software driver call to request for + * of requested irqs upon its software driver call to request for * MSI-X mode enabled on its hardware device function. A return of zero * indicates the successful configuration of MSI-X capability structure - * with new allocated MSI-X vectors. A return of < 0 indicates a failure. + * with new allocated MSI-X irqs. A return of < 0 indicates a failure. * Or a return of > 0 indicates that driver request is exceeding the number - * of vectors available. Driver should use the returned value to re-send + * of irqs available. Driver should use the returned value to re-send * its request. **/ int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec) @@ -1091,13 +998,13 @@ int pci_enable_msix(struct pci_dev* dev, struct msix_entry *entries, int nvec) } } temp = dev->irq; - WARN_ON(!msi_lookup_vector(dev, PCI_CAP_ID_MSIX)); + WARN_ON(!msi_lookup_irq(dev, PCI_CAP_ID_MSIX)); - /* Check whether driver already requested for MSI vector */ + /* Check whether driver already requested for MSI irq */ if (pci_find_capability(dev, PCI_CAP_ID_MSI) > 0 && - !msi_lookup_vector(dev, PCI_CAP_ID_MSI)) { + !msi_lookup_irq(dev, PCI_CAP_ID_MSI)) { printk(KERN_INFO "PCI: %s: Can't enable MSI-X. " - "Device already has an MSI vector assigned\n", + "Device already has an MSI irq assigned\n", pci_name(dev)); dev->irq = temp; return -EINVAL; @@ -1127,27 +1034,27 @@ void pci_disable_msix(struct pci_dev* dev) disable_msi_mode(dev, pos, PCI_CAP_ID_MSIX); temp = dev->irq; - if (!msi_lookup_vector(dev, PCI_CAP_ID_MSIX)) { - int state, vector, head, tail = 0, warning = 0; + if (!msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) { + int state, irq, head, tail = 0, warning = 0; unsigned long flags; - vector = head = dev->irq; + irq = head = dev->irq; dev->irq = temp; /* Restore pin IRQ */ while (head != tail) { spin_lock_irqsave(&msi_lock, flags); - state = msi_desc[vector]->msi_attrib.state; - tail = msi_desc[vector]->link.tail; + state = msi_desc[irq]->msi_attrib.state; + tail = msi_desc[irq]->link.tail; spin_unlock_irqrestore(&msi_lock, flags); if (state) warning = 1; - else if (vector != head) /* Release MSI-X vector */ - msi_free_vector(dev, vector, 0); - vector = tail; + else if (irq != head) /* Release MSI-X irq */ + msi_free_irq(dev, irq); + irq = tail; } - msi_free_vector(dev, vector, 0); + msi_free_irq(dev, irq); if (warning) { printk(KERN_WARNING "PCI: %s: pci_disable_msix() called without " - "free_irq() on all MSI-X vectors\n", + "free_irq() on all MSI-X irqs\n", pci_name(dev)); BUG_ON(warning > 0); } @@ -1155,11 +1062,11 @@ void pci_disable_msix(struct pci_dev* dev) } /** - * msi_remove_pci_irq_vectors - reclaim MSI(X) vectors to unused state + * msi_remove_pci_irq_vectors - reclaim MSI(X) irqs to unused state * @dev: pointer to the pci_dev data structure of MSI(X) device function * * Being called during hotplug remove, from which the device function - * is hot-removed. All previous assigned MSI/MSI-X vectors, if + * is hot-removed. All previous assigned MSI/MSI-X irqs, if * allocated for this device function, are reclaimed to unused state, * which may be used later on. **/ @@ -1173,42 +1080,42 @@ void msi_remove_pci_irq_vectors(struct pci_dev* dev) temp = dev->irq; /* Save IOAPIC IRQ */ pos = pci_find_capability(dev, PCI_CAP_ID_MSI); - if (pos > 0 && !msi_lookup_vector(dev, PCI_CAP_ID_MSI)) { + if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSI)) { spin_lock_irqsave(&msi_lock, flags); state = msi_desc[dev->irq]->msi_attrib.state; spin_unlock_irqrestore(&msi_lock, flags); if (state) { printk(KERN_WARNING "PCI: %s: msi_remove_pci_irq_vectors() " - "called without free_irq() on MSI vector %d\n", + "called without free_irq() on MSI irq %d\n", pci_name(dev), dev->irq); BUG_ON(state > 0); - } else /* Release MSI vector assigned to this device */ - msi_free_vector(dev, dev->irq, 0); + } else /* Release MSI irq assigned to this device */ + msi_free_irq(dev, dev->irq); dev->irq = temp; /* Restore IOAPIC IRQ */ } pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); - if (pos > 0 && !msi_lookup_vector(dev, PCI_CAP_ID_MSIX)) { - int vector, head, tail = 0, warning = 0; + if (pos > 0 && !msi_lookup_irq(dev, PCI_CAP_ID_MSIX)) { + int irq, head, tail = 0, warning = 0; void __iomem *base = NULL; - vector = head = dev->irq; + irq = head = dev->irq; while (head != tail) { spin_lock_irqsave(&msi_lock, flags); - state = msi_desc[vector]->msi_attrib.state; - tail = msi_desc[vector]->link.tail; - base = msi_desc[vector]->mask_base; + state = msi_desc[irq]->msi_attrib.state; + tail = msi_desc[irq]->link.tail; + base = msi_desc[irq]->mask_base; spin_unlock_irqrestore(&msi_lock, flags); if (state) warning = 1; - else if (vector != head) /* Release MSI-X vector */ - msi_free_vector(dev, vector, 0); - vector = tail; + else if (irq != head) /* Release MSI-X irq */ + msi_free_irq(dev, irq); + irq = tail; } - msi_free_vector(dev, vector, 0); + msi_free_irq(dev, irq); if (warning) { iounmap(base); printk(KERN_WARNING "PCI: %s: msi_remove_pci_irq_vectors() " - "called without free_irq() on all MSI-X vectors\n", + "called without free_irq() on all MSI-X irqs\n", pci_name(dev)); BUG_ON(warning > 0); } diff --git a/drivers/pci/msi.h b/drivers/pci/msi.h index 6793241f388..435d05aae4b 100644 --- a/drivers/pci/msi.h +++ b/drivers/pci/msi.h @@ -8,9 +8,6 @@ #include <asm/msi.h> -extern int vector_irq[NR_VECTORS]; -extern void (*interrupt[NR_IRQS])(void); - /* * MSI-X Address Register */ @@ -58,9 +55,9 @@ struct msi_desc { __u8 maskbit : 1; /* mask-pending bit supported ? */ __u8 state : 1; /* {0: free, 1: busy} */ __u8 is_64 : 1; /* Address size: 0=32bit 1=64bit */ - __u8 entry_nr; /* specific enabled entry */ - __u8 default_vector; /* default pre-assigned vector */ __u8 pos; /* Location of the msi capability */ + __u16 entry_nr; /* specific enabled entry */ + unsigned default_irq; /* default pre-assigned irq */ }msi_attrib; struct { |