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Diffstat (limited to 'drivers/misc/cxl/pci.c')
-rw-r--r--drivers/misc/cxl/pci.c100
1 files changed, 74 insertions, 26 deletions
diff --git a/drivers/misc/cxl/pci.c b/drivers/misc/cxl/pci.c
index 3ba04f371380..19969ee86d6f 100644
--- a/drivers/misc/cxl/pci.c
+++ b/drivers/misc/cxl/pci.c
@@ -401,7 +401,8 @@ int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid,
*capp_unit_id = get_capp_unit_id(np, *phb_index);
of_node_put(np);
if (!*capp_unit_id) {
- pr_err("cxl: invalid capp unit id\n");
+ pr_err("cxl: invalid capp unit id (phb_index: %d)\n",
+ *phb_index);
return -ENODEV;
}
@@ -475,37 +476,37 @@ static int init_implementation_adapter_regs_psl9(struct cxl *adapter,
psl_fircntl |= 0x1ULL; /* ce_thresh */
cxl_p1_write(adapter, CXL_PSL9_FIR_CNTL, psl_fircntl);
- /* vccredits=0x1 pcklat=0x4 */
- cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0000000000001810ULL);
-
- /*
- * For debugging with trace arrays.
- * Configure RX trace 0 segmented mode.
- * Configure CT trace 0 segmented mode.
- * Configure LA0 trace 0 segmented mode.
- * Configure LA1 trace 0 segmented mode.
+ /* Setup the PSL to transmit packets on the PCIe before the
+ * CAPP is enabled
*/
- cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000000ULL);
- cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000003ULL);
- cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000005ULL);
- cxl_p1_write(adapter, CXL_PSL9_TRACECFG, 0x8040800080000006ULL);
+ cxl_p1_write(adapter, CXL_PSL9_DSNDCTL, 0x0001001000002A10ULL);
/*
* A response to an ASB_Notify request is returned by the
* system as an MMIO write to the address defined in
- * the PSL_TNR_ADDR register
+ * the PSL_TNR_ADDR register.
+ * keep the Reset Value: 0x00020000E0000000
*/
- /* PSL_TNR_ADDR */
- /* NORST */
- cxl_p1_write(adapter, CXL_PSL9_DEBUG, 0x8000000000000000ULL);
+ /* Enable XSL rty limit */
+ cxl_p1_write(adapter, CXL_XSL9_DEF, 0x51F8000000000005ULL);
- /* allocate the apc machines */
- cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000003FFFF0000ULL);
+ /* Change XSL_INV dummy read threshold */
+ cxl_p1_write(adapter, CXL_XSL9_INV, 0x0000040007FFC200ULL);
+
+ if (phb_index == 3) {
+ /* disable machines 31-47 and 20-27 for DMA */
+ cxl_p1_write(adapter, CXL_PSL9_APCDEDTYPE, 0x40000FF3FFFF0000ULL);
+ }
- /* Disable vc dd1 fix */
- if (cxl_is_power9_dd1())
- cxl_p1_write(adapter, CXL_PSL9_GP_CT, 0x0400000000000001ULL);
+ /* Snoop machines */
+ cxl_p1_write(adapter, CXL_PSL9_APCDEDALLOC, 0x800F000200000000ULL);
+
+ 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);
return 0;
}
@@ -1746,6 +1747,44 @@ static void cxl_deconfigure_adapter(struct cxl *adapter)
pci_disable_device(pdev);
}
+static void cxl_stop_trace_psl9(struct cxl *adapter)
+{
+ int traceid;
+ u64 trace_state, trace_mask;
+ struct pci_dev *dev = to_pci_dev(adapter->dev.parent);
+
+ /* read each tracearray state and issue mmio to stop them is needed */
+ for (traceid = 0; traceid <= CXL_PSL9_TRACEID_MAX; ++traceid) {
+ trace_state = cxl_p1_read(adapter, CXL_PSL9_CTCCFG);
+ trace_mask = (0x3ULL << (62 - traceid * 2));
+ trace_state = (trace_state & trace_mask) >> (62 - traceid * 2);
+ dev_dbg(&dev->dev, "cxl: Traceid-%d trace_state=0x%0llX\n",
+ traceid, trace_state);
+
+ /* issue mmio if the trace array isn't in FIN state */
+ if (trace_state != CXL_PSL9_TRACESTATE_FIN)
+ cxl_p1_write(adapter, CXL_PSL9_TRACECFG,
+ 0x8400000000000000ULL | traceid);
+ }
+}
+
+static void cxl_stop_trace_psl8(struct cxl *adapter)
+{
+ int slice;
+
+ /* Stop the trace */
+ cxl_p1_write(adapter, CXL_PSL_TRACE, 0x8000000000000017LL);
+
+ /* Stop the slice traces */
+ spin_lock(&adapter->afu_list_lock);
+ for (slice = 0; slice < adapter->slices; slice++) {
+ if (adapter->afu[slice])
+ cxl_p1n_write(adapter->afu[slice], CXL_PSL_SLICE_TRACE,
+ 0x8000000000000000LL);
+ }
+ spin_unlock(&adapter->afu_list_lock);
+}
+
static const struct cxl_service_layer_ops psl9_ops = {
.adapter_regs_init = init_implementation_adapter_regs_psl9,
.invalidate_all = cxl_invalidate_all_psl9,
@@ -1762,6 +1801,7 @@ static const struct cxl_service_layer_ops psl9_ops = {
.debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl9,
.debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl9,
.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,
@@ -1785,7 +1825,7 @@ static const struct cxl_service_layer_ops psl8_ops = {
.debugfs_add_adapter_regs = cxl_debugfs_add_adapter_regs_psl8,
.debugfs_add_afu_regs = cxl_debugfs_add_afu_regs_psl8,
.psl_irq_dump_registers = cxl_native_irq_dump_regs_psl8,
- .err_irq_dump_registers = cxl_native_err_irq_dump_regs,
+ .err_irq_dump_registers = cxl_native_err_irq_dump_regs_psl8,
.debugfs_stop_trace = cxl_stop_trace_psl8,
.write_timebase_ctrl = write_timebase_ctrl_psl8,
.timebase_read = timebase_read_psl8,
@@ -2043,6 +2083,9 @@ static pci_ers_result_t cxl_vphb_error_detected(struct cxl_afu *afu,
/* There should only be one entry, but go through the list
* anyway
*/
+ if (afu->phb == NULL)
+ return result;
+
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
if (!afu_dev->driver)
continue;
@@ -2084,8 +2127,7 @@ static pci_ers_result_t cxl_pci_error_detected(struct pci_dev *pdev,
* Tell the AFU drivers; but we don't care what they
* say, we're going away.
*/
- if (afu->phb != NULL)
- cxl_vphb_error_detected(afu, state);
+ cxl_vphb_error_detected(afu, state);
}
return PCI_ERS_RESULT_DISCONNECT;
}
@@ -2225,6 +2267,9 @@ static pci_ers_result_t cxl_pci_slot_reset(struct pci_dev *pdev)
if (cxl_afu_select_best_mode(afu))
goto err;
+ if (afu->phb == NULL)
+ continue;
+
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
/* Reset the device context.
* TODO: make this less disruptive
@@ -2287,6 +2332,9 @@ static void cxl_pci_resume(struct pci_dev *pdev)
for (i = 0; i < adapter->slices; i++) {
afu = adapter->afu[i];
+ if (afu->phb == NULL)
+ continue;
+
list_for_each_entry(afu_dev, &afu->phb->bus->devices, bus_list) {
if (afu_dev->driver && afu_dev->driver->err_handler &&
afu_dev->driver->err_handler->resume)
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-17 22:19:29 +0200