summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/sparc64/kernel/irq.c71
-rw-r--r--arch/sparc64/kernel/pci_fire.c446
-rw-r--r--include/asm-sparc64/irq.h6
3 files changed, 522 insertions, 1 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 23956096b3b..7f5a4c77e3e 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -406,6 +406,18 @@ 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);
@@ -583,6 +595,17 @@ static struct irq_chip sun4v_irq_ack = {
};
#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,
@@ -628,6 +651,7 @@ void irq_install_pre_handler(int virt_irq,
chip == &sun4v_irq_ack ||
chip == &sun4v_virq_ack
#ifdef CONFIG_PCI_MSI
+ || chip == &sun4u_msi
|| chip == &sun4v_msi
#endif
)
@@ -789,6 +813,53 @@ 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)
diff --git a/arch/sparc64/kernel/pci_fire.c b/arch/sparc64/kernel/pci_fire.c
index 14d67fe21ab..090f2657967 100644
--- a/arch/sparc64/kernel/pci_fire.c
+++ b/arch/sparc64/kernel/pci_fire.c
@@ -6,9 +6,12 @@
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/init.h>
+#include <linux/msi.h>
+#include <linux/irq.h>
#include <asm/oplib.h>
#include <asm/prom.h>
+#include <asm/irq.h>
#include "pci_impl.h"
@@ -84,6 +87,440 @@ static int pci_fire_pbm_iommu_init(struct pci_pbm_info *pbm)
return 0;
}
+#ifdef CONFIG_PCI_MSI
+struct pci_msiq_entry {
+ u64 word0;
+#define MSIQ_WORD0_RESV 0x8000000000000000UL
+#define MSIQ_WORD0_FMT_TYPE 0x7f00000000000000UL
+#define MSIQ_WORD0_FMT_TYPE_SHIFT 56
+#define MSIQ_WORD0_LEN 0x00ffc00000000000UL
+#define MSIQ_WORD0_LEN_SHIFT 46
+#define MSIQ_WORD0_ADDR0 0x00003fff00000000UL
+#define MSIQ_WORD0_ADDR0_SHIFT 32
+#define MSIQ_WORD0_RID 0x00000000ffff0000UL
+#define MSIQ_WORD0_RID_SHIFT 16
+#define MSIQ_WORD0_DATA0 0x000000000000ffffUL
+#define MSIQ_WORD0_DATA0_SHIFT 0
+
+#define MSIQ_TYPE_MSG 0x6
+#define MSIQ_TYPE_MSI32 0xb
+#define MSIQ_TYPE_MSI64 0xf
+
+ u64 word1;
+#define MSIQ_WORD1_ADDR1 0xffffffffffff0000UL
+#define MSIQ_WORD1_ADDR1_SHIFT 16
+#define MSIQ_WORD1_DATA1 0x000000000000ffffUL
+#define MSIQ_WORD1_DATA1_SHIFT 0
+
+ u64 resv[6];
+};
+
+/* All MSI registers are offset from pbm->pbm_regs */
+#define EVENT_QUEUE_BASE_ADDR_REG 0x010000UL
+#define EVENT_QUEUE_BASE_ADDR_ALL_ONES 0xfffc000000000000UL
+
+#define EVENT_QUEUE_CONTROL_SET(EQ) (0x011000UL + (EQ) * 0x8UL)
+#define EVENT_QUEUE_CONTROL_SET_OFLOW 0x0200000000000000UL
+#define EVENT_QUEUE_CONTROL_SET_EN 0x0000100000000000UL
+
+#define EVENT_QUEUE_CONTROL_CLEAR(EQ) (0x011200UL + (EQ) * 0x8UL)
+#define EVENT_QUEUE_CONTROL_CLEAR_OF 0x0200000000000000UL
+#define EVENT_QUEUE_CONTROL_CLEAR_E2I 0x0000800000000000UL
+#define EVENT_QUEUE_CONTROL_CLEAR_DIS 0x0000100000000000UL
+
+#define EVENT_QUEUE_STATE(EQ) (0x011400UL + (EQ) * 0x8UL)
+#define EVENT_QUEUE_STATE_MASK 0x0000000000000007UL
+#define EVENT_QUEUE_STATE_IDLE 0x0000000000000001UL
+#define EVENT_QUEUE_STATE_ACTIVE 0x0000000000000002UL
+#define EVENT_QUEUE_STATE_ERROR 0x0000000000000004UL
+
+#define EVENT_QUEUE_TAIL(EQ) (0x011600UL + (EQ) * 0x8UL)
+#define EVENT_QUEUE_TAIL_OFLOW 0x0200000000000000UL
+#define EVENT_QUEUE_TAIL_VAL 0x000000000000007fUL
+
+#define EVENT_QUEUE_HEAD(EQ) (0x011800UL + (EQ) * 0x8UL)
+#define EVENT_QUEUE_HEAD_VAL 0x000000000000007fUL
+
+#define MSI_MAP(MSI) (0x020000UL + (MSI) * 0x8UL)
+#define MSI_MAP_VALID 0x8000000000000000UL
+#define MSI_MAP_EQWR_N 0x4000000000000000UL
+#define MSI_MAP_EQNUM 0x000000000000003fUL
+
+#define MSI_CLEAR(MSI) (0x028000UL + (MSI) * 0x8UL)
+#define MSI_CLEAR_EQWR_N 0x4000000000000000UL
+
+#define IMONDO_DATA0 0x02C000UL
+#define IMONDO_DATA0_DATA 0xffffffffffffffc0UL
+
+#define IMONDO_DATA1 0x02C008UL
+#define IMONDO_DATA1_DATA 0xffffffffffffffffUL
+
+#define MSI_32BIT_ADDR 0x034000UL
+#define MSI_32BIT_ADDR_VAL 0x00000000ffff0000UL
+
+#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)
+{
+ unsigned long msiqid, orig_head, head, type_fmt, type;
+ struct pci_pbm_info *pbm = data1;
+ struct pci_msiq_entry *base, *ep;
+
+ msiqid = (unsigned long) data2;
+
+ head = fire_read(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid));
+
+ 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];
+ }
+
+ if (likely(head != orig_head)) {
+ /* ACK entries by updating head pointer. */
+ fire_write(pbm->pbm_regs +
+ EVENT_QUEUE_HEAD(msiqid),
+ head);
+ }
+ return;
+
+bad_type:
+ printk(KERN_EMERG "MSI: Entry has bad type %lx\n", type);
+ return;
+}
+
+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_queue_alloc(struct pci_pbm_info *pbm)
+{
+ unsigned long pages, order, i;
+
+ order = get_order(512 * 1024);
+ pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order);
+ if (pages == 0UL) {
+ printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n",
+ order);
+ return -ENOMEM;
+ }
+ memset((char *)pages, 0, PAGE_SIZE << order);
+ pbm->msi_queues = (void *) pages;
+
+ fire_write(pbm->pbm_regs + EVENT_QUEUE_BASE_ADDR_REG,
+ (EVENT_QUEUE_BASE_ADDR_ALL_ONES |
+ __pa(pbm->msi_queues)));
+
+ fire_write(pbm->pbm_regs + IMONDO_DATA0,
+ pbm->portid << 6);
+ fire_write(pbm->pbm_regs + IMONDO_DATA1, 0);
+
+ fire_write(pbm->pbm_regs + MSI_32BIT_ADDR,
+ pbm->msi32_start);
+ fire_write(pbm->pbm_regs + MSI_64BIT_ADDR,
+ pbm->msi64_start);
+
+ for (i = 0; i < pbm->msiq_num; i++) {
+ fire_write(pbm->pbm_regs + EVENT_QUEUE_HEAD(i), 0);
+ fire_write(pbm->pbm_regs + EVENT_QUEUE_TAIL(i), 0);
+ }
+
+ return 0;
+}
+
+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 int pci_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, cregs, imap_off;
+ struct msi_msg msg;
+ int msi_num, err;
+ u64 val;
+
+ *virt_irq_p = 0;
+
+ msi_num = alloc_msi(pbm);
+ if (msi_num < 0)
+ return msi_num;
+
+ cregs = (unsigned long) pbm->pbm_regs;
+
+ 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;
+
+ imap_off = 0x001000UL + (devino * 0x8UL);
+
+ val = fire_read(pbm->pbm_regs + imap_off);
+ val |= (1UL << 63) | (1UL << 6);
+ fire_write(pbm->pbm_regs + imap_off, val);
+
+ msiqid = ((devino - pbm->msiq_first_devino) +
+ pbm->msiq_first);
+
+ 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;
+}
+
+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 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);
+}
+#else /* CONFIG_PCI_MSI */
+static void pci_fire_msi_init(struct pci_pbm_info *pbm)
+{
+}
+#endif /* !(CONFIG_PCI_MSI) */
+
/* Based at pbm->controller_regs */
#define FIRE_PARITY_CONTROL 0x470010UL
#define FIRE_PARITY_ENAB 0x8000000000000000UL
@@ -176,6 +613,7 @@ static int pci_fire_pbm_init(struct pci_controller_info *p,
{
const struct linux_prom64_registers *regs;
struct pci_pbm_info *pbm;
+ int err;
if ((portid & 1) == 0)
pbm = &p->pbm_A;
@@ -208,7 +646,13 @@ static int pci_fire_pbm_init(struct pci_controller_info *p,
pci_fire_hw_init(pbm);
- return pci_fire_pbm_iommu_init(pbm);
+ err = pci_fire_pbm_iommu_init(pbm);
+ if (err)
+ return err;
+
+ pci_fire_msi_init(pbm);
+
+ return 0;
}
static inline int portid_compare(u32 x, u32 y)
diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h
index c00ad152771..4de37254436 100644
--- a/include/asm-sparc64/irq.h
+++ b/include/asm-sparc64/irq.h
@@ -51,6 +51,12 @@ extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p,
unsigned int msi_devino_start,
unsigned int msi_devino_end);
extern void sun4v_destroy_msi(unsigned int virt_irq);
+extern unsigned int sun4u_build_msi(u32 portid, unsigned int *virt_irq_p,
+ unsigned int msi_devino_start,
+ unsigned int msi_devino_end,
+ unsigned long imap_base,
+ unsigned long iclr_base);
+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);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-06 05:37:02 +0000