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;
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;
-
- devino = sun4v_build_msi(pbm->devhandle, virt_irq_p,
- pbm->msiq_first_devino,
- (pbm->msiq_first_devino +
- pbm->msiq_num));
- err = -ENOMEM;
- if (!devino)
- goto out_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;
-
- pdev->dev.archdata.msi_num = 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);
- sun4v_destroy_msi(*virt_irq_p);
- *virt_irq_p = 0;
- 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 = pdev->dev.archdata.msi_num;
- 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)
p->pbm_B.iommu = iommu;
- /* Like PSYCHO and SCHIZO we have a 2GB aligned area
- * for memory space.
- */
- pci_memspace_mask = 0x7fffffffUL;
-
pci_sun4v_pbm_init(p, dp, devhandle);
return;
projects / deliverable / linux.git / blobdiff