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author | 2023-04-04 15:37:25 -0700 | |
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committer | 2023-04-04 15:37:25 -0700 | |
commit | ca712e47054678c5ce93a0e0f686353ad5561195 (patch) | |
tree | 575dd9f2e541ddd74b72e82dfe69c5badcb9e281 /drivers/cxl | |
parent | cxl/hdm: Extend DVSEC range register emulation for region enumeration (diff) | |
parent | PCI/DOE: Fix memory leak with CONFIG_DEBUG_OBJECTS=y (diff) | |
download | linux-ca712e47054678c5ce93a0e0f686353ad5561195.tar.gz linux-ca712e47054678c5ce93a0e0f686353ad5561195.tar.bz2 linux-ca712e47054678c5ce93a0e0f686353ad5561195.zip |
Merge branch 'for-6.3/cxl-doe-fixes' into for-6.3/cxl
Pick up the fixes (first 6 patches) from the DOE rework series from
Lukas for v6.3-rc.
Link: https://lore.kernel.org/all/cover.1678543498.git.lukas@wunner.de/
Diffstat (limited to 'drivers/cxl')
-rw-r--r-- | drivers/cxl/core/pci.c | 38 | ||||
-rw-r--r-- | drivers/cxl/cxlpci.h | 14 |
2 files changed, 37 insertions, 15 deletions
diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c index 7328a2552411..523d5b9fd7fc 100644 --- a/drivers/cxl/core/pci.c +++ b/drivers/cxl/core/pci.c @@ -462,7 +462,7 @@ static struct pci_doe_mb *find_cdat_doe(struct device *uport) return NULL; } -#define CDAT_DOE_REQ(entry_handle) \ +#define CDAT_DOE_REQ(entry_handle) cpu_to_le32 \ (FIELD_PREP(CXL_DOE_TABLE_ACCESS_REQ_CODE, \ CXL_DOE_TABLE_ACCESS_REQ_CODE_READ) | \ FIELD_PREP(CXL_DOE_TABLE_ACCESS_TABLE_TYPE, \ @@ -475,8 +475,8 @@ static void cxl_doe_task_complete(struct pci_doe_task *task) } struct cdat_doe_task { - u32 request_pl; - u32 response_pl[32]; + __le32 request_pl; + __le32 response_pl[32]; struct completion c; struct pci_doe_task task; }; @@ -510,10 +510,10 @@ static int cxl_cdat_get_length(struct device *dev, return rc; } wait_for_completion(&t.c); - if (t.task.rv < sizeof(u32)) + if (t.task.rv < 2 * sizeof(__le32)) return -EIO; - *length = t.response_pl[1]; + *length = le32_to_cpu(t.response_pl[1]); dev_dbg(dev, "CDAT length %zu\n", *length); return 0; @@ -524,13 +524,13 @@ static int cxl_cdat_read_table(struct device *dev, struct cxl_cdat *cdat) { size_t length = cdat->length; - u32 *data = cdat->table; + __le32 *data = cdat->table; int entry_handle = 0; do { DECLARE_CDAT_DOE_TASK(CDAT_DOE_REQ(entry_handle), t); + struct cdat_entry_header *entry; size_t entry_dw; - u32 *entry; int rc; rc = pci_doe_submit_task(cdat_doe, &t.task); @@ -539,26 +539,34 @@ static int cxl_cdat_read_table(struct device *dev, return rc; } wait_for_completion(&t.c); - /* 1 DW header + 1 DW data min */ - if (t.task.rv < (2 * sizeof(u32))) + + /* 1 DW Table Access Response Header + CDAT entry */ + entry = (struct cdat_entry_header *)(t.response_pl + 1); + if ((entry_handle == 0 && + t.task.rv != sizeof(__le32) + sizeof(struct cdat_header)) || + (entry_handle > 0 && + (t.task.rv < sizeof(__le32) + sizeof(*entry) || + t.task.rv != sizeof(__le32) + le16_to_cpu(entry->length)))) return -EIO; /* Get the CXL table access header entry handle */ entry_handle = FIELD_GET(CXL_DOE_TABLE_ACCESS_ENTRY_HANDLE, - t.response_pl[0]); - entry = t.response_pl + 1; - entry_dw = t.task.rv / sizeof(u32); + le32_to_cpu(t.response_pl[0])); + entry_dw = t.task.rv / sizeof(__le32); /* Skip Header */ entry_dw -= 1; - entry_dw = min(length / sizeof(u32), entry_dw); + entry_dw = min(length / sizeof(__le32), entry_dw); /* Prevent length < 1 DW from causing a buffer overflow */ if (entry_dw) { - memcpy(data, entry, entry_dw * sizeof(u32)); - length -= entry_dw * sizeof(u32); + memcpy(data, entry, entry_dw * sizeof(__le32)); + length -= entry_dw * sizeof(__le32); data += entry_dw; } } while (entry_handle != CXL_DOE_TABLE_ACCESS_LAST_ENTRY); + /* Length in CDAT header may exceed concatenation of CDAT entries */ + cdat->length -= length; + return 0; } diff --git a/drivers/cxl/cxlpci.h b/drivers/cxl/cxlpci.h index be6a2ef3cce3..0465ef963cd6 100644 --- a/drivers/cxl/cxlpci.h +++ b/drivers/cxl/cxlpci.h @@ -68,6 +68,20 @@ enum cxl_regloc_type { CXL_REGLOC_RBI_TYPES }; +struct cdat_header { + __le32 length; + u8 revision; + u8 checksum; + u8 reserved[6]; + __le32 sequence; +} __packed; + +struct cdat_entry_header { + u8 type; + u8 reserved; + __le16 length; +} __packed; + int devm_cxl_port_enumerate_dports(struct cxl_port *port); struct cxl_dev_state; int cxl_hdm_decode_init(struct cxl_dev_state *cxlds, struct cxl_hdm *cxlhdm, |