diff options
| -rw-r--r-- | arch/sparc64/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/sparc64/kernel/irq.c | 230 | ||||
| -rw-r--r-- | arch/sparc64/kernel/pci_fire.c | 380 | ||||
| -rw-r--r-- | arch/sparc64/kernel/pci_impl.h | 31 | ||||
| -rw-r--r-- | arch/sparc64/kernel/pci_msi.c | 433 | ||||
| -rw-r--r-- | arch/sparc64/kernel/pci_sun4v.c | 400 | ||||
| -rw-r--r-- | include/asm-sparc64/irq.h | 6 |
7 files changed, 704 insertions, 777 deletions
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile index 40d2f3a..112c46e 100644 --- a/arch/sparc64/kernel/Makefile +++ b/arch/sparc64/kernel/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o \ pci_psycho.o pci_sabre.o pci_schizo.o \ pci_sun4v.o pci_sun4v_asm.o pci_fire.o +obj-$(CONFIG_PCI_MSI) += pci_msi.o obj-$(CONFIG_SMP) += smp.o trampoline.o hvtramp.o obj-$(CONFIG_SPARC32_COMPAT) += sys32.o sys_sparc32.o signal32.o obj-$(CONFIG_BINFMT_ELF32) += binfmt_elf32.o diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c index 7f5a4c7..045ab27 100644 --- a/arch/sparc64/kernel/irq.c +++ b/arch/sparc64/kernel/irq.c @@ -21,7 +21,6 @@ #include <linux/seq_file.h> #include <linux/bootmem.h> #include <linux/irq.h> -#include <linux/msi.h> #include <asm/ptrace.h> #include <asm/processor.h> @@ -92,39 +91,46 @@ static struct { unsigned int dev_handle; unsigned int dev_ino; } virt_to_real_irq_table[NR_IRQS]; +static DEFINE_SPINLOCK(virt_irq_alloc_lock); -static unsigned char virt_irq_alloc(unsigned int real_irq) +unsigned char virt_irq_alloc(unsigned int real_irq) { + unsigned long flags; unsigned char ent; BUILD_BUG_ON(NR_IRQS >= 256); + spin_lock_irqsave(&virt_irq_alloc_lock, flags); + for (ent = 1; ent < NR_IRQS; ent++) { if (!virt_to_real_irq_table[ent].irq) break; } if (ent >= NR_IRQS) { printk(KERN_ERR "IRQ: Out of virtual IRQs.\n"); - return 0; + ent = 0; + } else { + virt_to_real_irq_table[ent].irq = real_irq; } - virt_to_real_irq_table[ent].irq = real_irq; + spin_unlock_irqrestore(&virt_irq_alloc_lock, flags); return ent; } #ifdef CONFIG_PCI_MSI -static void virt_irq_free(unsigned int virt_irq) +void virt_irq_free(unsigned int virt_irq) { - unsigned int real_irq; + unsigned long flags; if (virt_irq >= NR_IRQS) return; - real_irq = virt_to_real_irq_table[virt_irq].irq; + spin_lock_irqsave(&virt_irq_alloc_lock, flags); + virt_to_real_irq_table[virt_irq].irq = 0; - __bucket(real_irq)->virt_irq = 0; + spin_unlock_irqrestore(&virt_irq_alloc_lock, flags); } #endif @@ -217,27 +223,8 @@ struct irq_handler_data { void (*pre_handler)(unsigned int, void *, void *); void *pre_handler_arg1; void *pre_handler_arg2; - - u32 msi; }; -void sparc64_set_msi(unsigned int virt_irq, u32 msi) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - - if (data) - data->msi = msi; -} - -u32 sparc64_get_msi(unsigned int virt_irq) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - - if (data) - return data->msi; - return 0xffffffff; -} - static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq) { unsigned int real_irq = virt_to_real_irq(virt_irq); @@ -405,32 +392,6 @@ static void sun4v_irq_disable(unsigned int virt_irq) } } -#ifdef CONFIG_PCI_MSI -static void sun4u_msi_enable(unsigned int virt_irq) -{ - sun4u_irq_enable(virt_irq); - unmask_msi_irq(virt_irq); -} - -static void sun4u_msi_disable(unsigned int virt_irq) -{ - mask_msi_irq(virt_irq); - sun4u_irq_disable(virt_irq); -} - -static void sun4v_msi_enable(unsigned int virt_irq) -{ - sun4v_irq_enable(virt_irq); - unmask_msi_irq(virt_irq); -} - -static void sun4v_msi_disable(unsigned int virt_irq) -{ - mask_msi_irq(virt_irq); - sun4v_irq_disable(virt_irq); -} -#endif - static void sun4v_irq_end(unsigned int virt_irq) { struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq); @@ -585,39 +546,6 @@ static struct irq_chip sun4v_irq = { .set_affinity = sun4v_set_affinity, }; -static struct irq_chip sun4v_irq_ack = { - .typename = "sun4v+ack", - .enable = sun4v_irq_enable, - .disable = sun4v_irq_disable, - .ack = run_pre_handler, - .end = sun4v_irq_end, - .set_affinity = sun4v_set_affinity, -}; - -#ifdef CONFIG_PCI_MSI -static struct irq_chip sun4u_msi = { - .typename = "sun4u+msi", - .mask = mask_msi_irq, - .unmask = unmask_msi_irq, - .enable = sun4u_msi_enable, - .disable = sun4u_msi_disable, - .ack = run_pre_handler, - .end = sun4u_irq_end, - .set_affinity = sun4u_set_affinity, -}; - -static struct irq_chip sun4v_msi = { - .typename = "sun4v+msi", - .mask = mask_msi_irq, - .unmask = unmask_msi_irq, - .enable = sun4v_msi_enable, - .disable = sun4v_msi_disable, - .ack = run_pre_handler, - .end = sun4v_irq_end, - .set_affinity = sun4v_set_affinity, -}; -#endif - static struct irq_chip sun4v_virq = { .typename = "vsun4v", .enable = sun4v_virq_enable, @@ -626,42 +554,27 @@ static struct irq_chip sun4v_virq = { .set_affinity = sun4v_virt_set_affinity, }; -static struct irq_chip sun4v_virq_ack = { - .typename = "vsun4v+ack", - .enable = sun4v_virq_enable, - .disable = sun4v_virq_disable, - .ack = run_pre_handler, - .end = sun4v_virq_end, - .set_affinity = sun4v_virt_set_affinity, -}; - void irq_install_pre_handler(int virt_irq, void (*func)(unsigned int, void *, void *), void *arg1, void *arg2) { struct irq_handler_data *data = get_irq_chip_data(virt_irq); - struct irq_chip *chip; + struct irq_chip *chip = get_irq_chip(virt_irq); + + if (WARN_ON(chip == &sun4v_irq || chip == &sun4v_virq)) { + printk(KERN_ERR "IRQ: Trying to install pre-handler on " + "sun4v irq %u\n", virt_irq); + return; + } data->pre_handler = func; data->pre_handler_arg1 = arg1; data->pre_handler_arg2 = arg2; - chip = get_irq_chip(virt_irq); - if (chip == &sun4u_irq_ack || - chip == &sun4v_irq_ack || - chip == &sun4v_virq_ack -#ifdef CONFIG_PCI_MSI - || chip == &sun4u_msi - || chip == &sun4v_msi -#endif - ) + if (chip == &sun4u_irq_ack) return; - chip = (chip == &sun4u_irq ? - &sun4u_irq_ack : - (chip == &sun4v_irq ? - &sun4v_irq_ack : &sun4v_virq_ack)); - set_irq_chip(virt_irq, chip); + set_irq_chip(virt_irq, &sun4u_irq_ack); } unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap) @@ -765,103 +678,6 @@ unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino) return virq; } -#ifdef CONFIG_PCI_MSI -unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p, - unsigned int msi_start, unsigned int msi_end) -{ - struct ino_bucket *bucket; - struct irq_handler_data *data; - unsigned long sysino; - unsigned int devino; - - BUG_ON(tlb_type != hypervisor); - - /* Find a free devino in the given range. */ - for (devino = msi_start; devino < msi_end; devino++) { - sysino = sun4v_devino_to_sysino(devhandle, devino); - bucket = &ivector_table[sysino]; - if (!bucket->virt_irq) - break; - } - if (devino >= msi_end) - return -ENOSPC; - - sysino = sun4v_devino_to_sysino(devhandle, devino); - bucket = &ivector_table[sysino]; - bucket->virt_irq = virt_irq_alloc(__irq(bucket)); - *virt_irq_p = bucket->virt_irq; - set_irq_chip(bucket->virt_irq, &sun4v_msi); - - data = get_irq_chip_data(bucket->virt_irq); - if (unlikely(data)) - return devino; - - data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); - if (unlikely(!data)) { - virt_irq_free(*virt_irq_p); - return -ENOMEM; - } - set_irq_chip_data(bucket->virt_irq, data); - - data->imap = ~0UL; - data->iclr = ~0UL; - - return devino; -} - -void sun4v_destroy_msi(unsigned int virt_irq) -{ - virt_irq_free(virt_irq); -} - -unsigned int sun4u_build_msi(u32 portid, unsigned int *virt_irq_p, - unsigned int msi_start, unsigned int msi_end, - unsigned long imap_base, unsigned long iclr_base) -{ - struct ino_bucket *bucket; - struct irq_handler_data *data; - unsigned long sysino; - unsigned int devino; - - /* Find a free devino in the given range. */ - for (devino = msi_start; devino < msi_end; devino++) { - sysino = (portid << 6) | devino; - bucket = &ivector_table[sysino]; - if (!bucket->virt_irq) - break; - } - if (devino >= msi_end) - return -ENOSPC; - - sysino = (portid << 6) | devino; - bucket = &ivector_table[sysino]; - bucket->virt_irq = virt_irq_alloc(__irq(bucket)); - *virt_irq_p = bucket->virt_irq; - set_irq_chip(bucket->virt_irq, &sun4u_msi); - - data = get_irq_chip_data(bucket->virt_irq); - if (unlikely(data)) - return devino; - - data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); - if (unlikely(!data)) { - virt_irq_free(*virt_irq_p); - return -ENOMEM; - } - set_irq_chip_data(bucket->virt_irq, data); - - data->imap = (imap_base + (devino * 0x8UL)); - data->iclr = (iclr_base + (devino * 0x8UL)); - - return devino; -} - -void sun4u_destroy_msi(unsigned int virt_irq) -{ - virt_irq_free(virt_irq); -} -#endif - void ack_bad_irq(unsigned int virt_irq) { struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq); diff --git a/arch/sparc64/kernel/pci_fire.c b/arch/sparc64/kernel/pci_fire.c index 090f265..bcf6a5d 100644 --- a/arch/sparc64/kernel/pci_fire.c +++ b/arch/sparc64/kernel/pci_fire.c @@ -161,90 +161,92 @@ struct pci_msiq_entry { #define MSI_64BIT_ADDR 0x034008UL #define MSI_64BIT_ADDR_VAL 0xffffffffffff0000UL -/* For now this just runs as a pre-handler for the real interrupt handler. - * So we just walk through the queue and ACK all the entries, update the - * head pointer, and return. - * - * In the longer term it would be nice to do something more integrated - * wherein we can pass in some of this MSI info to the drivers. This - * would be most useful for PCIe fabric error messages, although we could - * invoke those directly from the loop here in order to pass the info around. - */ -static void pci_msi_prehandler(unsigned int ino, void *data1, void *data2) +static int pci_fire_get_head(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head) +{ + *head = fire_read(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid)); + return 0; +} + +static int pci_fire_dequeue_msi(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head, unsigned long *msi) { - unsigned long msiqid, orig_head, head, type_fmt, type; - struct pci_pbm_info *pbm = data1; + unsigned long type_fmt, type, msi_num; struct pci_msiq_entry *base, *ep; - msiqid = (unsigned long) data2; + base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * 8192)); + ep = &base[*head]; - head = fire_read(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid)); + if ((ep->word0 & MSIQ_WORD0_FMT_TYPE) == 0) + return 0; - orig_head = head; - base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * 8192)); - ep = &base[head]; - while ((ep->word0 & MSIQ_WORD0_FMT_TYPE) != 0) { - unsigned long msi_num; - - type_fmt = ((ep->word0 & MSIQ_WORD0_FMT_TYPE) >> - MSIQ_WORD0_FMT_TYPE_SHIFT); - type = (type_fmt >>3); - if (unlikely(type != MSIQ_TYPE_MSI32 && - type != MSIQ_TYPE_MSI64)) - goto bad_type; - - msi_num = ((ep->word0 & MSIQ_WORD0_DATA0) >> - MSIQ_WORD0_DATA0_SHIFT); - - fire_write(pbm->pbm_regs + MSI_CLEAR(msi_num), - MSI_CLEAR_EQWR_N); - - /* Clear the entry. */ - ep->word0 &= ~MSIQ_WORD0_FMT_TYPE; - - /* Go to next entry in ring. */ - head++; - if (head >= pbm->msiq_ent_count) - head = 0; - ep = &base[head]; - } + type_fmt = ((ep->word0 & MSIQ_WORD0_FMT_TYPE) >> + MSIQ_WORD0_FMT_TYPE_SHIFT); + type = (type_fmt >> 3); + if (unlikely(type != MSIQ_TYPE_MSI32 && + type != MSIQ_TYPE_MSI64)) + return -EINVAL; - if (likely(head != orig_head)) { - /* ACK entries by updating head pointer. */ - fire_write(pbm->pbm_regs + - EVENT_QUEUE_HEAD(msiqid), - head); - } - return; + *msi = msi_num = ((ep->word0 & MSIQ_WORD0_DATA0) >> + MSIQ_WORD0_DATA0_SHIFT); -bad_type: - printk(KERN_EMERG "MSI: Entry has bad type %lx\n", type); - return; + fire_write(pbm->pbm_regs + MSI_CLEAR(msi_num), + MSI_CLEAR_EQWR_N); + + /* Clear the entry. */ + ep->word0 &= ~MSIQ_WORD0_FMT_TYPE; + + /* Go to next entry in ring. */ + (*head)++; + if (*head >= pbm->msiq_ent_count) + *head = 0; + + return 1; } -static int msi_bitmap_alloc(struct pci_pbm_info *pbm) +static int pci_fire_set_head(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long head) { - unsigned long size, bits_per_ulong; + fire_write(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid), head); + return 0; +} - bits_per_ulong = sizeof(unsigned long) * 8; - size = (pbm->msi_num + (bits_per_ulong - 1)) & ~(bits_per_ulong - 1); - size /= 8; - BUG_ON(size % sizeof(unsigned long)); +static int pci_fire_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long msi, int is_msi64) +{ + u64 val; - pbm->msi_bitmap = kzalloc(size, GFP_KERNEL); - if (!pbm->msi_bitmap) - return -ENOMEM; + val = fire_read(pbm->pbm_regs + MSI_MAP(msi)); + val &= ~(MSI_MAP_EQNUM); + val |= msiqid; + fire_write(pbm->pbm_regs + MSI_MAP(msi), val); + + fire_write(pbm->pbm_regs + MSI_CLEAR(msi), + MSI_CLEAR_EQWR_N); + + val = fire_read(pbm->pbm_regs + MSI_MAP(msi)); + val |= MSI_MAP_VALID; + fire_write(pbm->pbm_regs + MSI_MAP(msi), val); return 0; } -static void msi_bitmap_free(struct pci_pbm_info *pbm) +static int pci_fire_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi) { - kfree(pbm->msi_bitmap); - pbm->msi_bitmap = NULL; + unsigned long msiqid; + u64 val; + + val = fire_read(pbm->pbm_regs + MSI_MAP(msi)); + msiqid = (val & MSI_MAP_EQNUM); + + val &= ~MSI_MAP_VALID; + + fire_write(pbm->pbm_regs + MSI_MAP(msi), val); + + return 0; } -static int msi_queue_alloc(struct pci_pbm_info *pbm) +static int pci_fire_msiq_alloc(struct pci_pbm_info *pbm) { unsigned long pages, order, i; @@ -279,241 +281,65 @@ static int msi_queue_alloc(struct pci_pbm_info *pbm) return 0; } -static int alloc_msi(struct pci_pbm_info *pbm) +static void pci_fire_msiq_free(struct pci_pbm_info *pbm) { - int i; + unsigned long pages, order; - for (i = 0; i < pbm->msi_num; i++) { - if (!test_and_set_bit(i, pbm->msi_bitmap)) - return i + pbm->msi_first; - } + order = get_order(512 * 1024); + pages = (unsigned long) pbm->msi_queues; - return -ENOENT; -} + free_pages(pages, order); -static void free_msi(struct pci_pbm_info *pbm, int msi_num) -{ - msi_num -= pbm->msi_first; - clear_bit(msi_num, pbm->msi_bitmap); + pbm->msi_queues = NULL; } -static int pci_setup_msi_irq(unsigned int *virt_irq_p, - struct pci_dev *pdev, - struct msi_desc *entry) +static int pci_fire_msiq_build_irq(struct pci_pbm_info *pbm, + unsigned long msiqid, + unsigned long devino) { - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long devino, msiqid, cregs, imap_off; - struct msi_msg msg; - int msi_num, err; + unsigned long cregs = (unsigned long) pbm->pbm_regs; + unsigned long imap_reg, iclr_reg, int_ctrlr; + unsigned int virt_irq; + int fixup; u64 val; - *virt_irq_p = 0; - - msi_num = alloc_msi(pbm); - if (msi_num < 0) - return msi_num; - - cregs = (unsigned long) pbm->pbm_regs; + imap_reg = cregs + (0x001000UL + (devino * 0x08UL)); + iclr_reg = cregs + (0x001400UL + (devino * 0x08UL)); - err = sun4u_build_msi(pbm->portid, virt_irq_p, - pbm->msiq_first_devino, - (pbm->msiq_first_devino + - pbm->msiq_num), - cregs + 0x001000UL, - cregs + 0x001400UL); - if (err < 0) - goto out_err; - devino = err; + /* XXX iterate amongst the 4 IRQ controllers XXX */ + int_ctrlr = (1UL << 6); - imap_off = 0x001000UL + (devino * 0x8UL); + val = fire_read(imap_reg); + val |= (1UL << 63) | int_ctrlr; + fire_write(imap_reg, val); - val = fire_read(pbm->pbm_regs + imap_off); - val |= (1UL << 63) | (1UL << 6); - fire_write(pbm->pbm_regs + imap_off, val); + fixup = ((pbm->portid << 6) | devino) - int_ctrlr; - msiqid = ((devino - pbm->msiq_first_devino) + - pbm->msiq_first); + virt_irq = build_irq(fixup, iclr_reg, imap_reg); + if (!virt_irq) + return -ENOMEM; fire_write(pbm->pbm_regs + EVENT_QUEUE_CONTROL_SET(msiqid), EVENT_QUEUE_CONTROL_SET_EN); - val = fire_read(pbm->pbm_regs + MSI_MAP(msi_num)); - val &= ~(MSI_MAP_EQNUM); - val |= msiqid; - fire_write(pbm->pbm_regs + MSI_MAP(msi_num), val); - - fire_write(pbm->pbm_regs + MSI_CLEAR(msi_num), - MSI_CLEAR_EQWR_N); - - val = fire_read(pbm->pbm_regs + MSI_MAP(msi_num)); - val |= MSI_MAP_VALID; - fire_write(pbm->pbm_regs + MSI_MAP(msi_num), val); - - sparc64_set_msi(*virt_irq_p, msi_num); - - if (entry->msi_attrib.is_64) { - msg.address_hi = pbm->msi64_start >> 32; - msg.address_lo = pbm->msi64_start & 0xffffffff; - } else { - msg.address_hi = 0; - msg.address_lo = pbm->msi32_start; - } - msg.data = msi_num; - - set_irq_msi(*virt_irq_p, entry); - write_msi_msg(*virt_irq_p, &msg); - - irq_install_pre_handler(*virt_irq_p, - pci_msi_prehandler, - pbm, (void *) msiqid); - - return 0; - -out_err: - free_msi(pbm, msi_num); - return err; + return virt_irq; } -static void pci_teardown_msi_irq(unsigned int virt_irq, - struct pci_dev *pdev) -{ - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long msiqid, msi_num; - u64 val; - - msi_num = sparc64_get_msi(virt_irq); - - val = fire_read(pbm->pbm_regs + MSI_MAP(msi_num)); - - msiqid = (val & MSI_MAP_EQNUM); - - val &= ~MSI_MAP_VALID; - fire_write(pbm->pbm_regs + MSI_MAP(msi_num), val); - - fire_write(pbm->pbm_regs + EVENT_QUEUE_CONTROL_CLEAR(msiqid), - EVENT_QUEUE_CONTROL_CLEAR_DIS); - - free_msi(pbm, msi_num); - - /* The sun4u_destroy_msi() will liberate the devino and thus the MSIQ - * allocation. - */ - sun4u_destroy_msi(virt_irq); -} +static const struct sparc64_msiq_ops pci_fire_msiq_ops = { + .get_head = pci_fire_get_head, + .dequeue_msi = pci_fire_dequeue_msi, + .set_head = pci_fire_set_head, + .msi_setup = pci_fire_msi_setup, + .msi_teardown = pci_fire_msi_teardown, + .msiq_alloc = pci_fire_msiq_alloc, + .msiq_free = pci_fire_msiq_free, + .msiq_build_irq = pci_fire_msiq_build_irq, +}; static void pci_fire_msi_init(struct pci_pbm_info *pbm) { - const u32 *val; - int len; - - val = of_get_property(pbm->prom_node, "#msi-eqs", &len); - if (!val || len != 4) - goto no_msi; - pbm->msiq_num = *val; - if (pbm->msiq_num) { - const struct msiq_prop { - u32 first_msiq; - u32 num_msiq; - u32 first_devino; - } *mqp; - const struct msi_range_prop { - u32 first_msi; - u32 num_msi; - } *mrng; - const struct addr_range_prop { - u32 msi32_high; - u32 msi32_low; - u32 msi32_len; - u32 msi64_high; - u32 msi64_low; - u32 msi64_len; - } *arng; - - val = of_get_property(pbm->prom_node, "msi-eq-size", &len); - if (!val || len != 4) - goto no_msi; - - pbm->msiq_ent_count = *val; - - mqp = of_get_property(pbm->prom_node, - "msi-eq-to-devino", &len); - if (!mqp) - mqp = of_get_property(pbm->prom_node, - "msi-eq-devino", &len); - if (!mqp || len != sizeof(struct msiq_prop)) - goto no_msi; - - pbm->msiq_first = mqp->first_msiq; - pbm->msiq_first_devino = mqp->first_devino; - - val = of_get_property(pbm->prom_node, "#msi", &len); - if (!val || len != 4) - goto no_msi; - pbm->msi_num = *val; - - mrng = of_get_property(pbm->prom_node, "msi-ranges", &len); - if (!mrng || len != sizeof(struct msi_range_prop)) - goto no_msi; - pbm->msi_first = mrng->first_msi; - - val = of_get_property(pbm->prom_node, "msi-data-mask", &len); - if (!val || len != 4) - goto no_msi; - pbm->msi_data_mask = *val; - - val = of_get_property(pbm->prom_node, "msix-data-width", &len); - if (!val || len != 4) - goto no_msi; - pbm->msix_data_width = *val; - - arng = of_get_property(pbm->prom_node, "msi-address-ranges", - &len); - if (!arng || len != sizeof(struct addr_range_prop)) - goto no_msi; - pbm->msi32_start = ((u64)arng->msi32_high << 32) | - (u64) arng->msi32_low; - pbm->msi64_start = ((u64)arng->msi64_high << 32) | - (u64) arng->msi64_low; - pbm->msi32_len = arng->msi32_len; - pbm->msi64_len = arng->msi64_len; - - if (msi_bitmap_alloc(pbm)) - goto no_msi; - - if (msi_queue_alloc(pbm)) { - msi_bitmap_free(pbm); - goto no_msi; - } - - printk(KERN_INFO "%s: MSI Queue first[%u] num[%u] count[%u] " - "devino[0x%x]\n", - pbm->name, - pbm->msiq_first, pbm->msiq_num, - pbm->msiq_ent_count, - pbm->msiq_first_devino); - printk(KERN_INFO "%s: MSI first[%u] num[%u] mask[0x%x] " - "width[%u]\n", - pbm->name, - pbm->msi_first, pbm->msi_num, pbm->msi_data_mask, - pbm->msix_data_width); - printk(KERN_INFO "%s: MSI addr32[0x%lx:0x%x] " - "addr64[0x%lx:0x%x]\n", - pbm->name, - pbm->msi32_start, pbm->msi32_len, - pbm->msi64_start, pbm->msi64_len); - printk(KERN_INFO "%s: MSI queues at RA [%016lx]\n", - pbm->name, - __pa(pbm->msi_queues)); - } - pbm->setup_msi_irq = pci_setup_msi_irq; - pbm->teardown_msi_irq = pci_teardown_msi_irq; - - return; - -no_msi: - pbm->msiq_num = 0; - printk(KERN_INFO "%s: No MSI support.\n", pbm->name); + sparc64_pbm_msi_init(pbm, &pci_fire_msiq_ops); } #else /* CONFIG_PCI_MSI */ static void pci_fire_msi_init(struct pci_pbm_info *pbm) diff --git a/arch/sparc64/kernel/pci_impl.h b/arch/sparc64/kernel/pci_impl.h index f660c2b..ccbb188 100644 --- a/arch/sparc64/kernel/pci_impl.h +++ b/arch/sparc64/kernel/pci_impl.h @@ -29,6 +29,33 @@ #define PCI_STC_FLUSHFLAG_SET(STC) \ (*((STC)->strbuf_flushflag) != 0UL) +#ifdef CONFIG_PCI_MSI +struct pci_pbm_info; +struct sparc64_msiq_ops { + int (*get_head)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head); + int (*dequeue_msi)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head, unsigned long *msi); + int (*set_head)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long head); + int (*msi_setup)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long msi, int is_msi64); + int (*msi_teardown)(struct pci_pbm_info *pbm, unsigned long msi); + int (*msiq_alloc)(struct pci_pbm_info *pbm); + void (*msiq_free)(struct pci_pbm_info *pbm); + int (*msiq_build_irq)(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long devino); +}; + +extern void sparc64_pbm_msi_init(struct pci_pbm_info *pbm, + const struct sparc64_msiq_ops *ops); + +struct sparc64_msiq_cookie { + struct pci_pbm_info *pbm; + unsigned long msiqid; +}; +#endif + struct pci_controller_info; struct pci_pbm_info { @@ -90,6 +117,8 @@ struct pci_pbm_info { u32 msiq_ent_count; u32 msiq_first; u32 msiq_first_devino; + u32 msiq_rotor; + struct sparc64_msiq_cookie *msiq_irq_cookies; u32 msi_num; u32 msi_first; u32 msi_data_mask; @@ -100,9 +129,11 @@ struct pci_pbm_info { u32 msi64_len; void *msi_queues; unsigned long *msi_bitmap; + unsigned int *msi_irq_table; int (*setup_msi_irq)(unsigned int *virt_irq_p, struct pci_dev *pdev, struct msi_desc *entry); void (*teardown_msi_irq)(unsigned int virt_irq, struct pci_dev *pdev); + const struct sparc64_msiq_ops *msi_ops; #endif /* !(CONFIG_PCI_MSI) */ /* This PBM's streaming buffer. */ diff --git a/arch/sparc64/kernel/pci_msi.c b/arch/sparc64/kernel/pci_msi.c new file mode 100644 index 0000000..0fa33b1 --- /dev/null +++ b/arch/sparc64/kernel/pci_msi.c @@ -0,0 +1,433 @@ +/* pci_msi.c: Sparc64 MSI support common layer. + * + * Copyright (C) 2007 David S. Miller (davem@davemloft.net) + */ +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/irq.h> + +#include "pci_impl.h" + +static irqreturn_t sparc64_msiq_interrupt(int irq, void *cookie) +{ + struct sparc64_msiq_cookie *msiq_cookie = cookie; + struct pci_pbm_info *pbm = msiq_cookie->pbm; + unsigned long msiqid = msiq_cookie->msiqid; + const struct sparc64_msiq_ops *ops; + unsigned long orig_head, head; + int err; + + ops = pbm->msi_ops; + + err = ops->get_head(pbm, msiqid, &head); + if (unlikely(err < 0)) + goto err_get_head; + + orig_head = head; + for (;;) { + unsigned long msi; + + err = ops->dequeue_msi(pbm, msiqid, &head, &msi); + if (likely(err > 0)) + __do_IRQ(pbm->msi_irq_table[msi - pbm->msi_first]); + + if (unlikely(err < 0)) + goto err_dequeue; + + if (err == 0) + break; + } + if (likely(head != orig_head)) { + err = ops->set_head(pbm, msiqid, head); + if (unlikely(err < 0)) + goto err_set_head; + } + return IRQ_HANDLED; + +err_get_head: + printk(KERN_EMERG "MSI: Get head on msiqid[%lu] gives error %d\n", + msiqid, err); + goto err_out; + +err_dequeue: + printk(KERN_EMERG "MSI: Dequeue head[%lu] from msiqid[%lu] " + "gives error %d\n", + head, msiqid, err); + goto err_out; + +err_set_head: + printk(KERN_EMERG "MSI: Set head[%lu] on msiqid[%lu] " + "gives error %d\n", + head, msiqid, err); + goto err_out; + +err_out: + return IRQ_NONE; +} + +static u32 pick_msiq(struct pci_pbm_info *pbm) +{ + static DEFINE_SPINLOCK(rotor_lock); + unsigned long flags; + u32 ret, rotor; + + spin_lock_irqsave(&rotor_lock, flags); + + rotor = pbm->msiq_rotor; + ret = pbm->msiq_first + rotor; + + if (++rotor >= pbm->msiq_num) + rotor = 0; + pbm->msiq_rotor = rotor; + + spin_unlock_irqrestore(&rotor_lock, flags); + + return ret; +} + + +static int alloc_msi(struct pci_pbm_info *pbm) +{ + int i; + + for (i = 0; i < pbm->msi_num; i++) { + if (!test_and_set_bit(i, pbm->msi_bitmap)) + return i + pbm->msi_first; + } + + return -ENOENT; +} + +static void free_msi(struct pci_pbm_info *pbm, int msi_num) +{ + msi_num -= pbm->msi_first; + clear_bit(msi_num, pbm->msi_bitmap); +} + +static struct irq_chip msi_irq = { + .typename = "PCI-MSI", + .mask = mask_msi_irq, + .unmask = unmask_msi_irq, + .enable = unmask_msi_irq, + .disable = mask_msi_irq, + /* XXX affinity XXX */ +}; + +int sparc64_setup_msi_irq(unsigned int *virt_irq_p, + struct pci_dev *pdev, + struct msi_desc *entry) +{ + struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; + const struct sparc64_msiq_ops *ops = pbm->msi_ops; + struct msi_msg msg; + int msi, err; + u32 msiqid; + + *virt_irq_p = virt_irq_alloc(~0); + err = -ENOMEM; + if (!*virt_irq_p) + goto out_err; + + set_irq_chip(*virt_irq_p, &msi_irq); + + err = alloc_msi(pbm); + if (unlikely(err < 0)) + goto out_virt_irq_free; + + msi = err; + + msiqid = pick_msiq(pbm); + + err = ops->msi_setup(pbm, msiqid, msi, + (entry->msi_attrib.is_64 ? 1 : 0)); + if (err) + goto out_msi_free; + + pbm->msi_irq_table[msi - pbm->msi_first] = *virt_irq_p; + + if (entry->msi_attrib.is_64) { + msg.address_hi = pbm->msi64_start >> 32; + msg.address_lo = pbm->msi64_start & 0xffffffff; + } else { + msg.address_hi = 0; + msg.address_lo = pbm->msi32_start; + } + msg.data = msi; + + set_irq_msi(*virt_irq_p, entry); + write_msi_msg(*virt_irq_p, &msg); + + return 0; + +out_msi_free: + free_msi(pbm, msi); + +out_virt_irq_free: + set_irq_chip(*virt_irq_p, NULL); + virt_irq_free(*virt_irq_p); + *virt_irq_p = 0; + +out_err: + return err; +} + +void sparc64_teardown_msi_irq(unsigned int virt_irq, + struct pci_dev *pdev) +{ + struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; + const struct sparc64_msiq_ops *ops = pbm->msi_ops; + unsigned int msi_num; + int i, err; + + for (i = 0; i < pbm->msi_num; i++) { + if (pbm->msi_irq_table[i] == virt_irq) + break; + } + if (i >= pbm->msi_num) { + printk(KERN_ERR "%s: teardown: No MSI for irq %u\n", + pbm->name, virt_irq); + return; + } + + msi_num = pbm->msi_first + i; + pbm->msi_irq_table[i] = ~0U; + + err = ops->msi_teardown(pbm, msi_num); + if (err) { + printk(KERN_ERR "%s: teardown: ops->teardown() on MSI %u, " + "irq %u, gives error %d\n", + pbm->name, msi_num, virt_irq, err); + return; + } + + free_msi(pbm, msi_num); + + set_irq_chip(virt_irq, NULL); + virt_irq_free(virt_irq); +} + +static int msi_bitmap_alloc(struct pci_pbm_info *pbm) +{ + unsigned long size, bits_per_ulong; + + bits_per_ulong = sizeof(unsigned long) * 8; + size = (pbm->msi_num + (bits_per_ulong - 1)) & ~(bits_per_ulong - 1); + size /= 8; + BUG_ON(size % sizeof(unsigned long)); + + pbm->msi_bitmap = kzalloc(size, GFP_KERNEL); + if (!pbm->msi_bitmap) + return -ENOMEM; + + return 0; +} + +static void msi_bitmap_free(struct pci_pbm_info *pbm) +{ + kfree(pbm->msi_bitmap); + pbm->msi_bitmap = NULL; +} + +static int msi_table_alloc(struct pci_pbm_info *pbm) +{ + int size, i; + + size = pbm->msiq_num * sizeof(struct sparc64_msiq_cookie); + pbm->msiq_irq_cookies = kzalloc(size, GFP_KERNEL); + if (!pbm->msiq_irq_cookies) + return -ENOMEM; + + for (i = 0; i < pbm->msiq_num; i++) { + struct sparc64_msiq_cookie *p; + + p = &pbm->msiq_irq_cookies[i]; + p->pbm = pbm; + p->msiqid = pbm->msiq_first + i; + } + + size = pbm->msi_num * sizeof(unsigned int); + pbm->msi_irq_table = kzalloc(size, GFP_KERNEL); + if (!pbm->msi_irq_table) { + kfree(pbm->msiq_irq_cookies); + pbm->msiq_irq_cookies = NULL; + return -ENOMEM; + } + + return 0; +} + +static void msi_table_free(struct pci_pbm_info *pbm) +{ + kfree(pbm->msiq_irq_cookies); + pbm->msiq_irq_cookies = NULL; + + kfree(pbm->msi_irq_table); + pbm->msi_irq_table = NULL; +} + +static int bringup_one_msi_queue(struct pci_pbm_info *pbm, + const struct sparc64_msiq_ops *ops, + unsigned long msiqid, + unsigned long devino) +{ + int irq = ops->msiq_build_irq(pbm, msiqid, devino); + int err; + + if (irq < 0) + return irq; + + err = request_irq(irq, sparc64_msiq_interrupt, 0, + "MSIQ", + &pbm->msiq_irq_cookies[msiqid - pbm->msiq_first]); + if (err) + return err; + + return 0; +} + +static int sparc64_bringup_msi_queues(struct pci_pbm_info *pbm, + const struct sparc64_msiq_ops *ops) +{ + int i; + + for (i = 0; i < pbm->msiq_num; i++) { + unsigned long msiqid = i + pbm->msiq_first; + unsigned long devino = i + pbm->msiq_first_devino; + int err; + + err = bringup_one_msi_queue(pbm, ops, msiqid, devino); + if (err) + return err; + } + + return 0; +} + +void sparc64_pbm_msi_init(struct pci_pbm_info *pbm, + const struct sparc64_msiq_ops *ops) +{ + const u32 *val; + int len; + + val = of_get_property(pbm->prom_node, "#msi-eqs", &len); + if (!val || len != 4) + goto no_msi; + pbm->msiq_num = *val; + if (pbm->msiq_num) { + const struct msiq_prop { + u32 first_msiq; + u32 num_msiq; + u32 first_devino; + } *mqp; + const struct msi_range_prop { + u32 first_msi; + u32 num_msi; + } *mrng; + const struct addr_range_prop { + u32 msi32_high; + u32 msi32_low; + u32 msi32_len; + u32 msi64_high; + u32 msi64_low; + u32 msi64_len; + } *arng; + + val = of_get_property(pbm->prom_node, "msi-eq-size", &len); + if (!val || len != 4) + goto no_msi; + + pbm->msiq_ent_count = *val; + + mqp = of_get_property(pbm->prom_node, + "msi-eq-to-devino", &len); + if (!mqp) + mqp = of_get_property(pbm->prom_node, + "msi-eq-devino", &len); + if (!mqp || len != sizeof(struct msiq_prop)) + goto no_msi; + + pbm->msiq_first = mqp->first_msiq; + pbm->msiq_first_devino = mqp->first_devino; + + val = of_get_property(pbm->prom_node, "#msi", &len); + if (!val || len != 4) + goto no_msi; + pbm->msi_num = *val; + + mrng = of_get_property(pbm->prom_node, "msi-ranges", &len); + if (!mrng || len != sizeof(struct msi_range_prop)) + goto no_msi; + pbm->msi_first = mrng->first_msi; + + val = of_get_property(pbm->prom_node, "msi-data-mask", &len); + if (!val || len != 4) + goto no_msi; + pbm->msi_data_mask = *val; + + val = of_get_property(pbm->prom_node, "msix-data-width", &len); + if (!val || len != 4) + goto no_msi; + pbm->msix_data_width = *val; + + arng = of_get_property(pbm->prom_node, "msi-address-ranges", + &len); + if (!arng || len != sizeof(struct addr_range_prop)) + goto no_msi; + pbm->msi32_start = ((u64)arng->msi32_high << 32) | + (u64) arng->msi32_low; + pbm->msi64_start = ((u64)arng->msi64_high << 32) | + (u64) arng->msi64_low; + pbm->msi32_len = arng->msi32_len; + pbm->msi64_len = arng->msi64_len; + + if (msi_bitmap_alloc(pbm)) + goto no_msi; + + if (msi_table_alloc(pbm)) { + msi_bitmap_free(pbm); + goto no_msi; + } + + if (ops->msiq_alloc(pbm)) { + msi_table_free(pbm); + msi_bitmap_free(pbm); + goto no_msi; + } + + if (sparc64_bringup_msi_queues(pbm, ops)) { + ops->msiq_free(pbm); + msi_table_free(pbm); + msi_bitmap_free(pbm); + goto no_msi; + } + + printk(KERN_INFO "%s: MSI Queue first[%u] num[%u] count[%u] " + "devino[0x%x]\n", + pbm->name, + pbm->msiq_first, pbm->msiq_num, + pbm->msiq_ent_count, + pbm->msiq_first_devino); + printk(KERN_INFO "%s: MSI first[%u] num[%u] mask[0x%x] " + "width[%u]\n", + pbm->name, + pbm->msi_first, pbm->msi_num, pbm->msi_data_mask, + pbm->msix_data_width); + printk(KERN_INFO "%s: MSI addr32[0x%lx:0x%x] " + "addr64[0x%lx:0x%x]\n", + pbm->name, + pbm->msi32_start, pbm->msi32_len, + pbm->msi64_start, pbm->msi64_len); + printk(KERN_INFO "%s: MSI queues at RA [%016lx]\n", + pbm->name, + __pa(pbm->msi_queues)); + + pbm->msi_ops = ops; + pbm->setup_msi_irq = sparc64_setup_msi_irq; + pbm->teardown_msi_irq = sparc64_teardown_msi_irq; + } + return; + +no_msi: + pbm->msiq_num = 0; + printk(KERN_INFO "%s: No MSI support.\n", pbm->name); +} diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c index da724b1..97c45b2 100644 --- a/arch/sparc64/kernel/pci_sun4v.c +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -748,111 +748,102 @@ struct pci_sun4v_msiq_entry { u64 reserved2; }; -/* For now this just runs as a pre-handler for the real interrupt handler. - * So we just walk through the queue and ACK all the entries, update the - * head pointer, and return. - * - * In the longer term it would be nice to do something more integrated - * wherein we can pass in some of this MSI info to the drivers. This - * would be most useful for PCIe fabric error messages, although we could - * invoke those directly from the loop here in order to pass the info around. - */ -static void pci_sun4v_msi_prehandler(unsigned int ino, void *data1, void *data2) +static int pci_sun4v_get_head(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long *head) { - struct pci_pbm_info *pbm = data1; - struct pci_sun4v_msiq_entry *base, *ep; - unsigned long msiqid, orig_head, head, type, err; - - msiqid = (unsigned long) data2; + unsigned long err, limit; - head = 0xdeadbeef; - err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, &head); + err = pci_sun4v_msiq_gethead(pbm->devhandle, msiqid, head); if (unlikely(err)) - goto hv_error_get; - - if (unlikely(head >= (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry)))) - goto bad_offset; - - head /= sizeof(struct pci_sun4v_msiq_entry); - orig_head = head; - base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * - (pbm->msiq_ent_count * - sizeof(struct pci_sun4v_msiq_entry)))); - ep = &base[head]; - while ((ep->version_type & MSIQ_TYPE_MASK) != 0) { - type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; - if (unlikely(type != MSIQ_TYPE_MSI32 && - type != MSIQ_TYPE_MSI64)) - goto bad_type; - - pci_sun4v_msi_setstate(pbm->devhandle, - ep->msi_data /* msi_num */, - HV_MSISTATE_IDLE); - - /* Clear the entry. */ - ep->version_type &= ~MSIQ_TYPE_MASK; - - /* Go to next entry in ring. */ - head++; - if (head >= pbm->msiq_ent_count) - head = 0; - ep = &base[head]; - } + return -ENXIO; - if (likely(head != orig_head)) { - /* ACK entries by updating head pointer. */ - head *= sizeof(struct pci_sun4v_msiq_entry); - err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); - if (unlikely(err)) - goto hv_error_set; - } - return; + limit = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); + if (unlikely(*head >= limit)) + return -EFBIG; -hv_error_set: - printk(KERN_EMERG "MSI: Hypervisor set head gives error %lu\n", err); - goto hv_error_cont; + return 0; +} -hv_error_get: - printk(KERN_EMERG "MSI: Hypervisor get head gives error %lu\n", err); +static int pci_sun4v_dequeue_msi(struct pci_pbm_info *pbm, + unsigned long msiqid, unsigned long *head, + unsigned long *msi) +{ + struct pci_sun4v_msiq_entry *ep; + unsigned long err, type; -hv_error_cont: - printk(KERN_EMERG "MSI: devhandle[%x] msiqid[%lx] head[%lu]\n", - pbm->devhandle, msiqid, head); - return; + /* Note: void pointer arithmetic, 'head' is a byte offset */ + ep = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * + (pbm->msiq_ent_count * + sizeof(struct pci_sun4v_msiq_entry))) + + *head); -bad_offset: - printk(KERN_EMERG "MSI: Hypervisor gives bad offset %lx max(%lx)\n", - head, pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry)); - return; + if ((ep->version_type & MSIQ_TYPE_MASK) == 0) + return 0; -bad_type: - printk(KERN_EMERG "MSI: Entry has bad type %lx\n", type); - return; + type = (ep->version_type & MSIQ_TYPE_MASK) >> MSIQ_TYPE_SHIFT; + if (unlikely(type != MSIQ_TYPE_MSI32 && + type != MSIQ_TYPE_MSI64)) + return -EINVAL; + + *msi = ep->msi_data; + + err = pci_sun4v_msi_setstate(pbm->devhandle, + ep->msi_data /* msi_num */, + HV_MSISTATE_IDLE); + if (unlikely(err)) + return -ENXIO; + + /* Clear the entry. */ + ep->version_type &= ~MSIQ_TYPE_MASK; + + (*head) += sizeof(struct pci_sun4v_msiq_entry); + if (*head >= + (pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry))) + *head = 0; + + return 1; } -static int msi_bitmap_alloc(struct pci_pbm_info *pbm) +static int pci_sun4v_set_head(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long head) { - unsigned long size, bits_per_ulong; + unsigned long err; - bits_per_ulong = sizeof(unsigned long) * 8; - size = (pbm->msi_num + (bits_per_ulong - 1)) & ~(bits_per_ulong - 1); - size /= 8; - BUG_ON(size % sizeof(unsigned long)); + err = pci_sun4v_msiq_sethead(pbm->devhandle, msiqid, head); + if (unlikely(err)) + return -EINVAL; - pbm->msi_bitmap = kzalloc(size, GFP_KERNEL); - if (!pbm->msi_bitmap) - return -ENOMEM; + return 0; +} +static int pci_sun4v_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid, + unsigned long msi, int is_msi64) +{ + if (pci_sun4v_msi_setmsiq(pbm->devhandle, msi, msiqid, + (is_msi64 ? + HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) + return -ENXIO; + if (pci_sun4v_msi_setstate(pbm->devhandle, msi, HV_MSISTATE_IDLE)) + return -ENXIO; + if (pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_VALID)) + return -ENXIO; return 0; } -static void msi_bitmap_free(struct pci_pbm_info *pbm) +static int pci_sun4v_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi) { - kfree(pbm->msi_bitmap); - pbm->msi_bitmap = NULL; + unsigned long err, msiqid; + + err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi, &msiqid); + if (err) + return -ENXIO; + + pci_sun4v_msi_setvalid(pbm->devhandle, msi, HV_MSIVALID_INVALID); + + return 0; } -static int msi_queue_alloc(struct pci_pbm_info *pbm) +static int pci_sun4v_msiq_alloc(struct pci_pbm_info *pbm) { unsigned long q_size, alloc_size, pages, order; int i; @@ -906,232 +897,59 @@ h_error: return -EINVAL; } - -static int alloc_msi(struct pci_pbm_info *pbm) +static void pci_sun4v_msiq_free(struct pci_pbm_info *pbm) { + unsigned long q_size, alloc_size, pages, order; int i; - for (i = 0; i < pbm->msi_num; i++) { - if (!test_and_set_bit(i, pbm->msi_bitmap)) - return i + pbm->msi_first; - } - - return -ENOENT; -} - -static void free_msi(struct pci_pbm_info *pbm, int msi_num) -{ - msi_num -= pbm->msi_first; - clear_bit(msi_num, pbm->msi_bitmap); -} - -static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, - struct pci_dev *pdev, - struct msi_desc *entry) -{ - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long devino, msiqid; - struct msi_msg msg; - int msi_num, err; - - *virt_irq_p = 0; - - msi_num = alloc_msi(pbm); - if (msi_num < 0) - return msi_num; - - err = sun4v_build_msi(pbm->devhandle, virt_irq_p, - pbm->msiq_first_devino, - (pbm->msiq_first_devino + - pbm->msiq_num)); - if (err < 0) - goto out_err; - devino = err; - - msiqid = ((devino - pbm->msiq_first_devino) + - pbm->msiq_first); - - err = -EINVAL; - if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) - if (err) - goto out_err; - - if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) - goto out_err; - - if (pci_sun4v_msi_setmsiq(pbm->devhandle, - msi_num, msiqid, - (entry->msi_attrib.is_64 ? - HV_MSITYPE_MSI64 : HV_MSITYPE_MSI32))) - goto out_err; - - if (pci_sun4v_msi_setstate(pbm->devhandle, msi_num, HV_MSISTATE_IDLE)) - goto out_err; - - if (pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_VALID)) - goto out_err; - - sparc64_set_msi(*virt_irq_p, msi_num); + for (i = 0; i < pbm->msiq_num; i++) { + unsigned long msiqid = pbm->msiq_first + i; - if (entry->msi_attrib.is_64) { - msg.address_hi = pbm->msi64_start >> 32; - msg.address_lo = pbm->msi64_start & 0xffffffff; - } else { - msg.address_hi = 0; - msg.address_lo = pbm->msi32_start; + (void) pci_sun4v_msiq_conf(pbm->devhandle, msiqid, 0UL, 0); } - msg.data = msi_num; - set_irq_msi(*virt_irq_p, entry); - write_msi_msg(*virt_irq_p, &msg); - - irq_install_pre_handler(*virt_irq_p, - pci_sun4v_msi_prehandler, - pbm, (void *) msiqid); + q_size = pbm->msiq_ent_count * sizeof(struct pci_sun4v_msiq_entry); + alloc_size = (pbm->msiq_num * q_size); + order = get_order(alloc_size); - return 0; + pages = (unsigned long) pbm->msi_queues; -out_err: - free_msi(pbm, msi_num); - return err; + free_pages(pages, order); + pbm->msi_queues = NULL; } -static void pci_sun4v_teardown_msi_irq(unsigned int virt_irq, - struct pci_dev *pdev) +static int pci_sun4v_msiq_build_irq(struct pci_pbm_info *pbm, + unsigned long msiqid, + unsigned long devino) { - struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; - unsigned long msiqid, err; - unsigned int msi_num; - - msi_num = sparc64_get_msi(virt_irq); - err = pci_sun4v_msi_getmsiq(pbm->devhandle, msi_num, &msiqid); - if (err) { - printk(KERN_ERR "%s: getmsiq gives error %lu\n", - pbm->name, err); - return; - } + unsigned int virt_irq = sun4v_build_irq(pbm->devhandle, devino); - pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_INVALID); - pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_INVALID); + if (!virt_irq) + return -ENOMEM; - free_msi(pbm, msi_num); + if (pci_sun4v_msiq_setstate(pbm->devhandle, msiqid, HV_MSIQSTATE_IDLE)) + return -EINVAL; + if (pci_sun4v_msiq_setvalid(pbm->devhandle, msiqid, HV_MSIQ_VALID)) + return -EINVAL; - /* The sun4v_destroy_msi() will liberate the devino and thus the MSIQ - * allocation. - */ - sun4v_destroy_msi(virt_irq); + return virt_irq; } +static const struct sparc64_msiq_ops pci_sun4v_msiq_ops = { + .get_head = pci_sun4v_get_head, + .dequeue_msi = pci_sun4v_dequeue_msi, + .set_head = pci_sun4v_set_head, + .msi_setup = pci_sun4v_msi_setup, + .msi_teardown = pci_sun4v_msi_teardown, + .msiq_alloc = pci_sun4v_msiq_alloc, + .msiq_free = pci_sun4v_msiq_free, + .msiq_build_irq = pci_sun4v_msiq_build_irq, +}; + static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) { - const u32 *val; - int len; - - val = of_get_property(pbm->prom_node, "#msi-eqs", &len); - if (!val || len != 4) - goto no_msi; - pbm->msiq_num = *val; - if (pbm->msiq_num) { - const struct msiq_prop { - u32 first_msiq; - u32 num_msiq; - u32 first_devino; - } *mqp; - const struct msi_range_prop { - u32 first_msi; - u32 num_msi; - } *mrng; - const struct addr_range_prop { - u32 msi32_high; - u32 msi32_low; - u32 msi32_len; - u32 msi64_high; - u32 msi64_low; - u32 msi64_len; - } *arng; - - val = of_get_property(pbm->prom_node, "msi-eq-size", &len); - if (!val || len != 4) - goto no_msi; - - pbm->msiq_ent_count = *val; - - mqp = of_get_property(pbm->prom_node, - "msi-eq-to-devino", &len); - if (!mqp || len != sizeof(struct msiq_prop)) - goto no_msi; - - pbm->msiq_first = mqp->first_msiq; - pbm->msiq_first_devino = mqp->first_devino; - - val = of_get_property(pbm->prom_node, "#msi", &len); - if (!val || len != 4) - goto no_msi; - pbm->msi_num = *val; - - mrng = of_get_property(pbm->prom_node, "msi-ranges", &len); - if (!mrng || len != sizeof(struct msi_range_prop)) - goto no_msi; - pbm->msi_first = mrng->first_msi; - - val = of_get_property(pbm->prom_node, "msi-data-mask", &len); - if (!val || len != 4) - goto no_msi; - pbm->msi_data_mask = *val; - - val = of_get_property(pbm->prom_node, "msix-data-width", &len); - if (!val || len != 4) - goto no_msi; - pbm->msix_data_width = *val; - - arng = of_get_property(pbm->prom_node, "msi-address-ranges", - &len); - if (!arng || len != sizeof(struct addr_range_prop)) - goto no_msi; - pbm->msi32_start = ((u64)arng->msi32_high << 32) | - (u64) arng->msi32_low; - pbm->msi64_start = ((u64)arng->msi64_high << 32) | - (u64) arng->msi64_low; - pbm->msi32_len = arng->msi32_len; - pbm->msi64_len = arng->msi64_len; - - if (msi_bitmap_alloc(pbm)) - goto no_msi; - - if (msi_queue_alloc(pbm)) { - msi_bitmap_free(pbm); - goto no_msi; - } - - printk(KERN_INFO "%s: MSI Queue first[%u] num[%u] count[%u] " - "devino[0x%x]\n", - pbm->name, - pbm->msiq_first, pbm->msiq_num, - pbm->msiq_ent_count, - pbm->msiq_first_devino); - printk(KERN_INFO "%s: MSI first[%u] num[%u] mask[0x%x] " - "width[%u]\n", - pbm->name, - pbm->msi_first, pbm->msi_num, pbm->msi_data_mask, - pbm->msix_data_width); - printk(KERN_INFO "%s: MSI addr32[0x%lx:0x%x] " - "addr64[0x%lx:0x%x]\n", - pbm->name, - pbm->msi32_start, pbm->msi32_len, - pbm->msi64_start, pbm->msi64_len); - printk(KERN_INFO "%s: MSI queues at RA [%p]\n", - pbm->name, - pbm->msi_queues); - } - pbm->setup_msi_irq = pci_sun4v_setup_msi_irq; - pbm->teardown_msi_irq = pci_sun4v_teardown_msi_irq; - - return; - -no_msi: - pbm->msiq_num = 0; - printk(KERN_INFO "%s: No MSI support.\n", pbm->name); + sparc64_pbm_msi_init(pbm, &pci_sun4v_msiq_ops); } #else /* CONFIG_PCI_MSI */ static void pci_sun4v_msi_init(struct pci_pbm_info *pbm) diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h index 4de3725..bad3c28 100644 --- a/include/asm-sparc64/irq.h +++ b/include/asm-sparc64/irq.h @@ -59,8 +59,10 @@ extern unsigned int sun4u_build_msi(u32 portid, unsigned int *virt_irq_p, extern void sun4u_destroy_msi(unsigned int virt_irq); extern unsigned int sbus_build_irq(void *sbus, unsigned int ino); -extern void sparc64_set_msi(unsigned int virt_irq, u32 msi); -extern u32 sparc64_get_msi(unsigned int virt_irq); +extern unsigned char virt_irq_alloc(unsigned int real_irq); +#ifdef CONFIG_PCI_MSI +extern void virt_irq_free(unsigned int virt_irq); +#endif extern void fixup_irqs(void); |
