| Message ID | 4b3e2ead4f392d1a47a7528da119d57918e5d806.1664392886.git.robin.murphy@arm.com |
|---|---|
| State | Accepted |
| Commit | 05da178ce0aa152f0592e10fa874054187f3621b |
| Headers | show |
| Series | ACPI/IORT: Update SMMUv3 DeviceID support | expand |
On Wed, Sep 28, 2022 at 08:21:26PM +0100, Robin Murphy wrote: > External email: Use caution opening links or attachments > > > IORT E.e now allows SMMUv3 nodes to describe the DeviceID for MSIs > independently of wired GSIVs, where the previous oddly-restrictive > definition meant that an SMMU without PRI support had to provide a > DeviceID even if it didn't support MSIs either. Support this, with > the usual temporary flag definition while the real one is making > its way through ACPICA. > > Signed-off-by: Robin Murphy <robin.murphy@arm.com> All the indentations in this patch are using white spaces vs. tabs, so it fails at git-apply. I manually fixed them and tested the PATCH by applying a small revision hack to the IORT binaries: --------- diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 3269a888fb7a..5a4eef7b937c 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -333,8 +333,20 @@ void __iomem __ref return NULL; } - if (!acpi_permanent_mmap) - return __acpi_map_table((unsigned long)phys, size); + if (!acpi_permanent_mmap) { + virt = __acpi_map_table((unsigned long)phys, size); + if (!strncmp((char *)virt, "IORT", 4)) { + u8 *tmp = virt; + int i = 0x30; + while (i < size) { + if (tmp[i] == 0x4) /* SMMUv3 */ + tmp[i + 3] = 0x5; /* Revision */ + i += tmp[i + 1]; /* next node */ + continue; + } + } + return virt; + } mutex_lock(&acpi_ioremap_lock); /* Check if there's a suitable mapping already. */ --------- Once the indentations are fixed, Tested-by: Nicolin Chen <nicolinc@nvidia.com> Reviewed-by: Nicolin Chen <nicolinc@nvidia.com> Thanks! Nicolin > --- > drivers/acpi/arm64/iort.c | 16 ++++++++++++---- > 1 file changed, 12 insertions(+), 4 deletions(-) > > diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c > index ca2aed86b540..51bc3c1d8d42 100644 > --- a/drivers/acpi/arm64/iort.c > +++ b/drivers/acpi/arm64/iort.c > @@ -402,6 +402,10 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, > return NULL; > } > > +#ifndef ACPI_IORT_SMMU_V3_DEVICEID_VALID > +#define ACPI_IORT_SMMU_V3_DEVICEID_VALID (1 << 4) > +#endif > + > static int iort_get_id_mapping_index(struct acpi_iort_node *node) > { > struct acpi_iort_smmu_v3 *smmu; > @@ -418,12 +422,16 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) > > smmu = (struct acpi_iort_smmu_v3 *)node->node_data; > /* > - * ID mapping index is only ignored if all interrupts are > - * GSIV based > + * Until IORT E.e (node rev. 5), the ID mapping index was > + * defined to be valid unless all interrupts are GSIV-based. > */ > - if (smmu->event_gsiv && smmu->pri_gsiv && smmu->gerr_gsiv > - && smmu->sync_gsiv) > + if (node->revision < 5) { > + if (smmu->event_gsiv && smmu->pri_gsiv && > + smmu->gerr_gsiv && smmu->sync_gsiv) > + return -EINVAL; > + } else if (!(smmu->flags & ACPI_IORT_SMMU_V3_DEVICEID_VALID)) { > return -EINVAL; > + } > > if (smmu->id_mapping_index >= node->mapping_count) { > pr_err(FW_BUG "[node %p type %d] ID mapping index overflows valid mappings\n", > -- > 2.36.1.dirty >
On 2022-09-29 00:55, Nicolin Chen wrote: > On Wed, Sep 28, 2022 at 08:21:26PM +0100, Robin Murphy wrote: >> External email: Use caution opening links or attachments >> >> >> IORT E.e now allows SMMUv3 nodes to describe the DeviceID for MSIs >> independently of wired GSIVs, where the previous oddly-restrictive >> definition meant that an SMMU without PRI support had to provide a >> DeviceID even if it didn't support MSIs either. Support this, with >> the usual temporary flag definition while the real one is making >> its way through ACPICA. >> >> Signed-off-by: Robin Murphy <robin.murphy@arm.com> > > All the indentations in this patch are using white spaces vs. tabs, That must be something at your end - they're definitely tabs here, and the copy in the lore archives looks right too. > so it fails at git-apply. I manually fixed them and tested the PATCH > by applying a small revision hack to the IORT binaries: > > --------- > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index 3269a888fb7a..5a4eef7b937c 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -333,8 +333,20 @@ void __iomem __ref > return NULL; > } > > - if (!acpi_permanent_mmap) > - return __acpi_map_table((unsigned long)phys, size); > + if (!acpi_permanent_mmap) { > + virt = __acpi_map_table((unsigned long)phys, size); > + if (!strncmp((char *)virt, "IORT", 4)) { > + u8 *tmp = virt; > + int i = 0x30; > + while (i < size) { > + if (tmp[i] == 0x4) /* SMMUv3 */ > + tmp[i + 3] = 0x5; /* Revision */ > + i += tmp[i + 1]; /* next node */ > + continue; > + } > + } > + return virt; > + } > > mutex_lock(&acpi_ioremap_lock); > /* Check if there's a suitable mapping already. */ > --------- > > Once the indentations are fixed, > > Tested-by: Nicolin Chen <nicolinc@nvidia.com> > Reviewed-by: Nicolin Chen <nicolinc@nvidia.com> Thanks for confirming! Robin. > > Thanks! > Nicolin > >> --- >> drivers/acpi/arm64/iort.c | 16 ++++++++++++---- >> 1 file changed, 12 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c >> index ca2aed86b540..51bc3c1d8d42 100644 >> --- a/drivers/acpi/arm64/iort.c >> +++ b/drivers/acpi/arm64/iort.c >> @@ -402,6 +402,10 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, >> return NULL; >> } >> >> +#ifndef ACPI_IORT_SMMU_V3_DEVICEID_VALID >> +#define ACPI_IORT_SMMU_V3_DEVICEID_VALID (1 << 4) >> +#endif >> + >> static int iort_get_id_mapping_index(struct acpi_iort_node *node) >> { >> struct acpi_iort_smmu_v3 *smmu; >> @@ -418,12 +422,16 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) >> >> smmu = (struct acpi_iort_smmu_v3 *)node->node_data; >> /* >> - * ID mapping index is only ignored if all interrupts are >> - * GSIV based >> + * Until IORT E.e (node rev. 5), the ID mapping index was >> + * defined to be valid unless all interrupts are GSIV-based. >> */ >> - if (smmu->event_gsiv && smmu->pri_gsiv && smmu->gerr_gsiv >> - && smmu->sync_gsiv) >> + if (node->revision < 5) { >> + if (smmu->event_gsiv && smmu->pri_gsiv && >> + smmu->gerr_gsiv && smmu->sync_gsiv) >> + return -EINVAL; >> + } else if (!(smmu->flags & ACPI_IORT_SMMU_V3_DEVICEID_VALID)) { >> return -EINVAL; >> + } >> >> if (smmu->id_mapping_index >= node->mapping_count) { >> pr_err(FW_BUG "[node %p type %d] ID mapping index overflows valid mappings\n", >> -- >> 2.36.1.dirty >>
On Wed, 28 Sep 2022 20:21:26 +0100, Robin Murphy wrote: > IORT E.e now allows SMMUv3 nodes to describe the DeviceID for MSIs > independently of wired GSIVs, where the previous oddly-restrictive > definition meant that an SMMU without PRI support had to provide a > DeviceID even if it didn't support MSIs either. Support this, with > the usual temporary flag definition while the real one is making > its way through ACPICA. > > [...] Applied to arm64 (for-next/acpi), thanks! [1/1] ACPI/IORT: Update SMMUv3 DeviceID support https://git.kernel.org/arm64/c/05da178ce0aa Cheers,
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index ca2aed86b540..51bc3c1d8d42 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -402,6 +402,10 @@ static struct acpi_iort_node *iort_node_get_id(struct acpi_iort_node *node, return NULL; } +#ifndef ACPI_IORT_SMMU_V3_DEVICEID_VALID +#define ACPI_IORT_SMMU_V3_DEVICEID_VALID (1 << 4) +#endif + static int iort_get_id_mapping_index(struct acpi_iort_node *node) { struct acpi_iort_smmu_v3 *smmu; @@ -418,12 +422,16 @@ static int iort_get_id_mapping_index(struct acpi_iort_node *node) smmu = (struct acpi_iort_smmu_v3 *)node->node_data; /* - * ID mapping index is only ignored if all interrupts are - * GSIV based + * Until IORT E.e (node rev. 5), the ID mapping index was + * defined to be valid unless all interrupts are GSIV-based. */ - if (smmu->event_gsiv && smmu->pri_gsiv && smmu->gerr_gsiv - && smmu->sync_gsiv) + if (node->revision < 5) { + if (smmu->event_gsiv && smmu->pri_gsiv && + smmu->gerr_gsiv && smmu->sync_gsiv) + return -EINVAL; + } else if (!(smmu->flags & ACPI_IORT_SMMU_V3_DEVICEID_VALID)) { return -EINVAL; + } if (smmu->id_mapping_index >= node->mapping_count) { pr_err(FW_BUG "[node %p type %d] ID mapping index overflows valid mappings\n",
IORT E.e now allows SMMUv3 nodes to describe the DeviceID for MSIs independently of wired GSIVs, where the previous oddly-restrictive definition meant that an SMMU without PRI support had to provide a DeviceID even if it didn't support MSIs either. Support this, with the usual temporary flag definition while the real one is making its way through ACPICA. Signed-off-by: Robin Murphy <robin.murphy@arm.com> --- drivers/acpi/arm64/iort.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-)