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path: root/drivers/misc/cxl/pci.c
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Diffstat (limited to 'drivers/misc/cxl/pci.c')
-rw-r--r--drivers/misc/cxl/pci.c102
1 files changed, 64 insertions, 38 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 758842f65a1b..83f1d08058fc 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -407,21 +407,59 @@ int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid,
return 0;
}
-int cxl_get_xsl9_dsnctl(u64 capp_unit_id, u64 *reg)
+static DEFINE_MUTEX(indications_mutex);
+
+static int get_phb_indications(struct pci_dev *dev, u64 *capiind, u64 *asnind,
+ u64 *nbwind)
+{
+ static u64 nbw, asn, capi = 0;
+ struct device_node *np;
+ const __be32 *prop;
+
+ mutex_lock(&indications_mutex);
+ if (!capi) {
+ if (!(np = pnv_pci_get_phb_node(dev))) {
+ mutex_unlock(&indications_mutex);
+ return -ENODEV;
+ }
+
+ prop = of_get_property(np, "ibm,phb-indications", NULL);
+ if (!prop) {
+ nbw = 0x0300UL; /* legacy values */
+ asn = 0x0400UL;
+ capi = 0x0200UL;
+ } else {
+ nbw = (u64)be32_to_cpu(prop[2]);
+ asn = (u64)be32_to_cpu(prop[1]);
+ capi = (u64)be32_to_cpu(prop[0]);
+ }
+ of_node_put(np);
+ }
+ *capiind = capi;
+ *asnind = asn;
+ *nbwind = nbw;
+ mutex_unlock(&indications_mutex);
+ return 0;
+}
+
+int cxl_get_xsl9_dsnctl(struct pci_dev *dev, u64 capp_unit_id, u64 *reg)
{
u64 xsl_dsnctl;
+ u64 capiind, asnind, nbwind;
/*
* CAPI Identifier bits [0:7]
* bit 61:60 MSI bits --> 0
* bit 59 TVT selector --> 0
*/
+ if (get_phb_indications(dev, &capiind, &asnind, &nbwind))
+ return -ENODEV;
/*
* Tell XSL where to route data to.
* The field chipid should match the PHB CAPI_CMPM register
*/
- xsl_dsnctl = ((u64)0x2 << (63-7)); /* Bit 57 */
+ xsl_dsnctl = (capiind << (63-15)); /* Bit 57 */
xsl_dsnctl |= (capp_unit_id << (63-15));
/* nMMU_ID Defaults to: b’000001001’*/
@@ -435,14 +473,14 @@ int cxl_get_xsl9_dsnctl(u64 capp_unit_id, u64 *reg)
* nbwind=0x03, bits [57:58], must include capi indicator.
* Not supported on P9 DD1.
*/
- xsl_dsnctl |= ((u64)0x03 << (63-47));
+ xsl_dsnctl |= (nbwind << (63-55));
/*
* Upper 16b address bits of ASB_Notify messages sent to the
* system. Need to match the PHB’s ASN Compare/Mask Register.
* Not supported on P9 DD1.
*/
- xsl_dsnctl |= ((u64)0x04 << (63-55));
+ xsl_dsnctl |= asnind;
}
*reg = xsl_dsnctl;
@@ -456,13 +494,14 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter,
u64 chipid;
u32 phb_index;
u64 capp_unit_id;
+ u64 psl_debug;
int rc;
rc = cxl_calc_capp_routing(dev, &chipid, &phb_index, &capp_unit_id);
if (rc)
return rc;
- rc = cxl_get_xsl9_dsnctl(capp_unit_id, &xsl_dsnctl);
+ rc = cxl_get_xsl9_dsnctl(dev, capp_unit_id, &xsl_dsnctl);
if (rc)
return rc;
@@ -503,8 +542,22 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter,
if (cxl_is_power9_dd1()) {
/* Disabling deadlock counter CAR */
cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0020000000000001ULL);
- } else
- cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x4000000000000000ULL);
+ /* Enable NORST */
+ cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x8000000000000000ULL);
+ } else {
+ /* Enable NORST and DD2 features */
+ cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0xC000000000000000ULL);
+ }
+
+ /*
+ * Check if PSL has data-cache. We need to flush adapter datacache
+ * when as its about to be removed.
+ */
+ psl_debug = cxl_p1_read(adapter, CXL_PSL9_DEBUG);
+ if (psl_debug & CXL_PSL_DEBUG_CDC) {
+ dev_dbg(&dev->dev, "No data-cache present\n");
+ adapter->native->no_data_cache = true;
+ }
return 0;
}
@@ -568,12 +621,6 @@ static int init_implementation_adapter_regs_xsl(struct cxl *adapter, struct pci_
/* For the PSL this is a multiple for 0 < n <= 7: */
#define PSL_2048_250MHZ_CYCLES 1
-static void write_timebase_ctrl_psl9(struct cxl *adapter)
-{
- cxl_p1_write(adapter, CXL_PSL9_TB_CTLSTAT,
- TBSYNC_CNT(2 * PSL_2048_250MHZ_CYCLES));
-}
-
static void write_timebase_ctrl_psl8(struct cxl *adapter)
{
cxl_p1_write(adapter, CXL_PSL_TB_CTLSTAT,
@@ -612,9 +659,6 @@ static u64 timebase_read_xsl(struct cxl *adapter)
static void cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev)
{
- u64 psl_tb;
- int delta;
- unsigned int retry = 0;
struct device_node *np;
adapter->psl_timebase_synced = false;
@@ -635,26 +679,13 @@ static void cxl_setup_psl_timebase(struct cxl *adapter, struct pci_dev *dev)
* Setup PSL Timebase Control and Status register
* with the recommended Timebase Sync Count value
*/
- adapter->native->sl_ops->write_timebase_ctrl(adapter);
+ if (adapter->native->sl_ops->write_timebase_ctrl)
+ adapter->native->sl_ops->write_timebase_ctrl(adapter);
/* Enable PSL Timebase */
cxl_p1_write(adapter, CXL_PSL_Control, 0x0000000000000000);
cxl_p1_write(adapter, CXL_PSL_Control, CXL_PSL_Control_tb);
- /* Wait until CORE TB and PSL TB difference <= 16usecs */
- do {
- msleep(1);
- if (retry++ > 5) {
- dev_info(&dev->dev, "PSL timebase can't synchronize\n");
- return;
- }
- psl_tb = adapter->native->sl_ops->timebase_read(adapter);
- delta = mftb() - psl_tb;
- if (delta < 0)
- delta = -delta;
- } while (tb_to_ns(delta) > 16000);
-
- adapter->psl_timebase_synced = true;
return;
}
@@ -1449,10 +1480,8 @@ int cxl_pci_reset(struct cxl *adapter)
/*
* The adapter is about to be reset, so ignore errors.
- * Not supported on P9 DD1
*/
- if ((cxl_is_power8()) || (!(cxl_is_power9_dd1())))
- cxl_data_cache_flush(adapter);
+ cxl_data_cache_flush(adapter);
/* pcie_warm_reset requests a fundamental pci reset which includes a
* PERST assert/deassert. PERST triggers a loading of the image
@@ -1801,7 +1830,6 @@ static const struct cxl_service_layer_ops psl9_ops = {
.psl_irq_dump_registers = cxl_native_irq_dump_regs_psl9,
.err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl9,
.debugfs_stop_trace = cxl_stop_trace_psl9,
- .write_timebase_ctrl = write_timebase_ctrl_psl9,
.timebase_read = timebase_read_psl9,
.capi_mode = OPAL_PHB_CAPI_MODE_CAPI,
.needs_reset_before_disable = true,
@@ -1936,10 +1964,8 @@ static void cxl_pci_remove_adapter(struct cxl *adapter)
/*
* Flush adapter datacache as its about to be removed.
- * Not supported on P9 DD1.
*/
- if ((cxl_is_power8()) || (!(cxl_is_power9_dd1())))
- cxl_data_cache_flush(adapter);
+ cxl_data_cache_flush(adapter);
cxl_deconfigure_adapter(adapter);