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author | David S. Miller <davem@sunset.davemloft.net> | 2007-08-30 22:27:28 -0700 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2007-08-30 23:06:51 -0700 |
commit | 5f92c329364c0bf2d3a356da5e8759fbe349f9d1 (patch) | |
tree | 2bf27d77009229a26c371102655c5f81c7e68d1e | |
parent | 6e69d6068cc2aa545544189a1ee4d2e1a32ad591 (diff) | |
download | kernel_goldelico_gta04-5f92c329364c0bf2d3a356da5e8759fbe349f9d1.zip kernel_goldelico_gta04-5f92c329364c0bf2d3a356da5e8759fbe349f9d1.tar.gz kernel_goldelico_gta04-5f92c329364c0bf2d3a356da5e8759fbe349f9d1.tar.bz2 |
[SPARC64]: Fix several bugs in MSI handling.
1) sun4{u,v}_build_msi() have improper return value handling.
We should always return negative error codes, instead of
using the magic value "0" which could in fact be a valid
MSI number.
2) sun4{u,v}_build_msi() should return -ENOMEM instead of
calling prom_prom() halt with kzalloc() of the interrupt
data fails.
3) We 'remembered' the MSI number using a singleton in the
struct device archdata area, this doesn't work for MSI-X
which can cause multiple MSIs assosciated with one device.
Delete that archdata member, and instead store the MSI
number in the IRQ chip data area.
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | arch/sparc64/kernel/irq.c | 25 | ||||
-rw-r--r-- | arch/sparc64/kernel/pci.c | 1 | ||||
-rw-r--r-- | arch/sparc64/kernel/pci_sun4v.c | 18 | ||||
-rw-r--r-- | include/asm-sparc64/device.h | 2 | ||||
-rw-r--r-- | include/asm-sparc64/irq.h | 3 |
5 files changed, 33 insertions, 16 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c index 51b8875..2395609 100644 --- a/arch/sparc64/kernel/irq.c +++ b/arch/sparc64/kernel/irq.c @@ -217,8 +217,27 @@ 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); @@ -741,7 +760,7 @@ unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p, break; } if (devino >= msi_end) - return 0; + return -ENOSPC; sysino = sun4v_devino_to_sysino(devhandle, devino); bucket = &ivector_table[sysino]; @@ -755,8 +774,8 @@ unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p, data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); if (unlikely(!data)) { - prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n"); - prom_halt(); + virt_irq_free(*virt_irq_p); + return -ENOMEM; } set_irq_chip_data(bucket->virt_irq, data); diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c index 3d93e92..139b4cf 100644 --- a/arch/sparc64/kernel/pci.c +++ b/arch/sparc64/kernel/pci.c @@ -393,7 +393,6 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, sd->host_controller = pbm; sd->prom_node = node; sd->op = of_find_device_by_node(node); - sd->msi_num = 0xffffffff; sd = &sd->op->dev.archdata; sd->iommu = pbm->iommu; diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c index 466f4aa..da724b1 100644 --- a/arch/sparc64/kernel/pci_sun4v.c +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -940,13 +940,13 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, 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) + 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); @@ -971,7 +971,7 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, if (pci_sun4v_msi_setvalid(pbm->devhandle, msi_num, HV_MSIVALID_VALID)) goto out_err; - pdev->dev.archdata.msi_num = msi_num; + sparc64_set_msi(*virt_irq_p, msi_num); if (entry->msi_attrib.is_64) { msg.address_hi = pbm->msi64_start >> 32; @@ -993,8 +993,6 @@ static int pci_sun4v_setup_msi_irq(unsigned int *virt_irq_p, out_err: free_msi(pbm, msi_num); - sun4v_destroy_msi(*virt_irq_p); - *virt_irq_p = 0; return err; } @@ -1006,7 +1004,7 @@ static void pci_sun4v_teardown_msi_irq(unsigned int virt_irq, unsigned long msiqid, err; unsigned int msi_num; - msi_num = pdev->dev.archdata.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", diff --git a/include/asm-sparc64/device.h b/include/asm-sparc64/device.h index d5a4559..5111e87 100644 --- a/include/asm-sparc64/device.h +++ b/include/asm-sparc64/device.h @@ -16,8 +16,6 @@ struct dev_archdata { struct device_node *prom_node; struct of_device *op; - - unsigned int msi_num; }; #endif /* _ASM_SPARC64_DEVICE_H */ diff --git a/include/asm-sparc64/irq.h b/include/asm-sparc64/irq.h index c041e10..c00ad15 100644 --- a/include/asm-sparc64/irq.h +++ b/include/asm-sparc64/irq.h @@ -53,6 +53,9 @@ extern unsigned int sun4v_build_msi(u32 devhandle, unsigned int *virt_irq_p, extern void sun4v_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 void fixup_irqs(void); static __inline__ void set_softint(unsigned long bits) |