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Diffstat (limited to 'drivers/cxl/cxl.h')
-rw-r--r--drivers/cxl/cxl.h96
1 files changed, 94 insertions, 2 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index c9e1b48a1a53..f2b0962a552d 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -130,6 +130,7 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
#define CXL_RAS_UNCORRECTABLE_STATUS_MASK (GENMASK(16, 14) | GENMASK(11, 0))
#define CXL_RAS_UNCORRECTABLE_MASK_OFFSET 0x4
#define CXL_RAS_UNCORRECTABLE_MASK_MASK (GENMASK(16, 14) | GENMASK(11, 0))
+#define CXL_RAS_UNCORRECTABLE_MASK_F256B_MASK BIT(8)
#define CXL_RAS_UNCORRECTABLE_SEVERITY_OFFSET 0x8
#define CXL_RAS_UNCORRECTABLE_SEVERITY_MASK (GENMASK(16, 14) | GENMASK(11, 0))
#define CXL_RAS_CORRECTABLE_STATUS_OFFSET 0xC
@@ -140,6 +141,8 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
#define CXL_RAS_CAP_CONTROL_FE_MASK GENMASK(5, 0)
#define CXL_RAS_HEADER_LOG_OFFSET 0x18
#define CXL_RAS_CAPABILITY_LENGTH 0x58
+#define CXL_HEADERLOG_SIZE SZ_512
+#define CXL_HEADERLOG_SIZE_U32 SZ_512 / sizeof(u32)
/* CXL 2.0 8.2.8.1 Device Capabilities Array Register */
#define CXLDEV_CAP_ARRAY_OFFSET 0x0
@@ -154,6 +157,22 @@ static inline int ways_to_eiw(unsigned int ways, u8 *eiw)
#define CXLDEV_CAP_CAP_ID_SECONDARY_MAILBOX 0x3
#define CXLDEV_CAP_CAP_ID_MEMDEV 0x4000
+/* CXL 3.0 8.2.8.3.1 Event Status Register */
+#define CXLDEV_DEV_EVENT_STATUS_OFFSET 0x00
+#define CXLDEV_EVENT_STATUS_INFO BIT(0)
+#define CXLDEV_EVENT_STATUS_WARN BIT(1)
+#define CXLDEV_EVENT_STATUS_FAIL BIT(2)
+#define CXLDEV_EVENT_STATUS_FATAL BIT(3)
+
+#define CXLDEV_EVENT_STATUS_ALL (CXLDEV_EVENT_STATUS_INFO | \
+ CXLDEV_EVENT_STATUS_WARN | \
+ CXLDEV_EVENT_STATUS_FAIL | \
+ CXLDEV_EVENT_STATUS_FATAL)
+
+/* CXL rev 3.0 section 8.2.9.2.4; Table 8-52 */
+#define CXLDEV_EVENT_INT_MODE_MASK GENMASK(1, 0)
+#define CXLDEV_EVENT_INT_MSGNUM_MASK GENMASK(7, 4)
+
/* CXL 2.0 8.2.8.4 Mailbox Registers */
#define CXLDEV_MBOX_CAPS_OFFSET 0x00
#define CXLDEV_MBOX_CAP_PAYLOAD_SIZE_MASK GENMASK(4, 0)
@@ -259,6 +278,8 @@ resource_size_t cxl_rcrb_to_component(struct device *dev,
* cxl_decoder flags that define the type of memory / devices this
* decoder supports as well as configuration lock status See "CXL 2.0
* 8.2.5.12.7 CXL HDM Decoder 0 Control Register" for details.
+ * Additionally indicate whether decoder settings were autodetected,
+ * user customized.
*/
#define CXL_DECODER_F_RAM BIT(0)
#define CXL_DECODER_F_PMEM BIT(1)
@@ -318,12 +339,36 @@ enum cxl_decoder_mode {
CXL_DECODER_DEAD,
};
+static inline const char *cxl_decoder_mode_name(enum cxl_decoder_mode mode)
+{
+ static const char * const names[] = {
+ [CXL_DECODER_NONE] = "none",
+ [CXL_DECODER_RAM] = "ram",
+ [CXL_DECODER_PMEM] = "pmem",
+ [CXL_DECODER_MIXED] = "mixed",
+ };
+
+ if (mode >= CXL_DECODER_NONE && mode <= CXL_DECODER_MIXED)
+ return names[mode];
+ return "mixed";
+}
+
+/*
+ * Track whether this decoder is reserved for region autodiscovery, or
+ * free for userspace provisioning.
+ */
+enum cxl_decoder_state {
+ CXL_DECODER_STATE_MANUAL,
+ CXL_DECODER_STATE_AUTO,
+};
+
/**
* struct cxl_endpoint_decoder - Endpoint / SPA to DPA decoder
* @cxld: base cxl_decoder_object
* @dpa_res: actively claimed DPA span of this decoder
* @skip: offset into @dpa_res where @cxld.hpa_range maps
* @mode: which memory type / access-mode-partition this decoder targets
+ * @state: autodiscovery state
* @pos: interleave position in @cxld.region
*/
struct cxl_endpoint_decoder {
@@ -331,6 +376,7 @@ struct cxl_endpoint_decoder {
struct resource *dpa_res;
resource_size_t skip;
enum cxl_decoder_mode mode;
+ enum cxl_decoder_state state;
int pos;
};
@@ -364,6 +410,7 @@ typedef struct cxl_dport *(*cxl_calc_hb_fn)(struct cxl_root_decoder *cxlrd,
* @region_id: region id for next region provisioning event
* @calc_hb: which host bridge covers the n'th position by granularity
* @platform_data: platform specific configuration data
+ * @range_lock: sync region autodiscovery by address range
* @cxlsd: base cxl switch decoder
*/
struct cxl_root_decoder {
@@ -371,6 +418,7 @@ struct cxl_root_decoder {
atomic_t region_id;
cxl_calc_hb_fn calc_hb;
void *platform_data;
+ struct mutex range_lock;
struct cxl_switch_decoder cxlsd;
};
@@ -420,6 +468,13 @@ struct cxl_region_params {
*/
#define CXL_REGION_F_INCOHERENT 0
+/*
+ * Indicate whether this region has been assembled by autodetection or
+ * userspace assembly. Prevent endpoint decoders outside of automatic
+ * detection from being added to the region.
+ */
+#define CXL_REGION_F_AUTO 1
+
/**
* struct cxl_region - CXL region
* @dev: This region's device
@@ -475,6 +530,12 @@ struct cxl_pmem_region {
struct cxl_pmem_region_mapping mapping[];
};
+struct cxl_dax_region {
+ struct device dev;
+ struct cxl_region *cxlr;
+ struct range hpa_range;
+};
+
/**
* struct cxl_port - logical collection of upstream port devices and
* downstream port devices to construct a CXL memory
@@ -615,8 +676,10 @@ struct cxl_dport *devm_cxl_add_rch_dport(struct cxl_port *port,
struct cxl_decoder *to_cxl_decoder(struct device *dev);
struct cxl_root_decoder *to_cxl_root_decoder(struct device *dev);
+struct cxl_switch_decoder *to_cxl_switch_decoder(struct device *dev);
struct cxl_endpoint_decoder *to_cxl_endpoint_decoder(struct device *dev);
bool is_root_decoder(struct device *dev);
+bool is_switch_decoder(struct device *dev);
bool is_endpoint_decoder(struct device *dev);
struct cxl_root_decoder *cxl_root_decoder_alloc(struct cxl_port *port,
unsigned int nr_targets,
@@ -630,10 +693,26 @@ int cxl_decoder_add_locked(struct cxl_decoder *cxld, int *target_map);
int cxl_decoder_autoremove(struct device *host, struct cxl_decoder *cxld);
int cxl_endpoint_autoremove(struct cxl_memdev *cxlmd, struct cxl_port *endpoint);
+/**
+ * struct cxl_endpoint_dvsec_info - Cached DVSEC info
+ * @mem_enabled: cached value of mem_enabled in the DVSEC, PCIE_DEVICE
+ * @ranges: Number of active HDM ranges this device uses.
+ * @dvsec_range: cached attributes of the ranges in the DVSEC, PCIE_DEVICE
+ */
+struct cxl_endpoint_dvsec_info {
+ bool mem_enabled;
+ int ranges;
+ struct range dvsec_range[2];
+};
+
struct cxl_hdm;
-struct cxl_hdm *devm_cxl_setup_hdm(struct cxl_port *port);
-int devm_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm);
+struct cxl_hdm *devm_cxl_setup_hdm(struct cxl_port *port,
+ struct cxl_endpoint_dvsec_info *info);
+int devm_cxl_enumerate_decoders(struct cxl_hdm *cxlhdm,
+ struct cxl_endpoint_dvsec_info *info);
int devm_cxl_add_passthrough_decoder(struct cxl_port *port);
+int cxl_dvsec_rr_decode(struct device *dev, int dvsec,
+ struct cxl_endpoint_dvsec_info *info);
bool is_cxl_region(struct device *dev);
@@ -667,6 +746,7 @@ void cxl_driver_unregister(struct cxl_driver *cxl_drv);
#define CXL_DEVICE_MEMORY_EXPANDER 5
#define CXL_DEVICE_REGION 6
#define CXL_DEVICE_PMEM_REGION 7
+#define CXL_DEVICE_DAX_REGION 8
#define MODULE_ALIAS_CXL(type) MODULE_ALIAS("cxl:t" __stringify(type) "*")
#define CXL_MODALIAS_FMT "cxl:t%d"
@@ -683,6 +763,9 @@ struct cxl_nvdimm_bridge *cxl_find_nvdimm_bridge(struct device *dev);
#ifdef CONFIG_CXL_REGION
bool is_cxl_pmem_region(struct device *dev);
struct cxl_pmem_region *to_cxl_pmem_region(struct device *dev);
+int cxl_add_to_region(struct cxl_port *root,
+ struct cxl_endpoint_decoder *cxled);
+struct cxl_dax_region *to_cxl_dax_region(struct device *dev);
#else
static inline bool is_cxl_pmem_region(struct device *dev)
{
@@ -692,6 +775,15 @@ static inline struct cxl_pmem_region *to_cxl_pmem_region(struct device *dev)
{
return NULL;
}
+static inline int cxl_add_to_region(struct cxl_port *root,
+ struct cxl_endpoint_decoder *cxled)
+{
+ return 0;
+}
+static inline struct cxl_dax_region *to_cxl_dax_region(struct device *dev)
+{
+ return NULL;
+}
#endif
/*
View Lorry Controller Status