powerpc/powernv: Support PCI slot ID

The reset and poll functionality from (OPAL) firmware supports
PHB and PCI slot at same time. They are identified by ID. This
supports PCI slot ID by:

   * Rename the argument name for opal_pci_reset() and opal_pci_poll()
     accordingly
   * Rename pnv_eeh_phb_poll() to pnv_eeh_poll() and adjust its argument
     name.
   * One macro is added to produce PCI slot ID.
Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/opal.h

@@ -131,7 +131,7 @@ int64_t opal_pci_map_pe_dma_window(uint64_t phb_id, uint16_t pe_number, uint16_t
 int64_t opal_pci_map_pe_dma_window_real(uint64_t phb_id, uint16_t pe_number,
 					uint16_t dma_window_number, uint64_t pci_start_addr,
 					uint64_t pci_mem_size);
-int64_t opal_pci_reset(uint64_t phb_id, uint8_t reset_scope, uint8_t assert_state);
+int64_t opal_pci_reset(uint64_t id, uint8_t reset_scope, uint8_t assert_state);
 
 int64_t opal_pci_get_hub_diag_data(uint64_t hub_id, void *diag_buffer,
 				   uint64_t diag_buffer_len);
@@ -148,7 +148,7 @@ int64_t opal_get_dpo_status(__be64 *dpo_timeout);
 int64_t opal_set_system_attention_led(uint8_t led_action);
 int64_t opal_pci_next_error(uint64_t phb_id, __be64 *first_frozen_pe,
 			    __be16 *pci_error_type, __be16 *severity);
-int64_t opal_pci_poll(uint64_t phb_id);
+int64_t opal_pci_poll(uint64_t id);
 int64_t opal_return_cpu(void);
 int64_t opal_check_token(uint64_t token);
 int64_t opal_reinit_cpus(uint64_t flags);

arch/powerpc/include/asm/pnv-pci.h

@@ -13,6 +13,10 @@
 #include <linux/pci.h>
 #include <misc/cxl-base.h>
 
+#define PCI_SLOT_ID_PREFIX	0x8000000000000000
+#define PCI_SLOT_ID(phb_id, bdfn)	\
+	(PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
+
 int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
 int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
 			   unsigned int virq);

arch/powerpc/platforms/powernv/eeh-powernv.c

@@ -717,12 +717,12 @@ static int pnv_eeh_get_state(struct eeh_pe *pe, int *delay)
 	return ret;
 }
 
-static s64 pnv_eeh_phb_poll(struct pnv_phb *phb)
+static s64 pnv_eeh_poll(unsigned long id)
 {
 	s64 rc = OPAL_HARDWARE;
 
 	while (1) {
-		rc = opal_pci_poll(phb->opal_id);
+		rc = opal_pci_poll(id);
 		if (rc <= 0)
 			break;
 
@@ -762,7 +762,7 @@ int pnv_eeh_phb_reset(struct pci_controller *hose, int option)
 	 * reset followed by hot reset on root bus. So we also
 	 * need the PCI bus settlement delay.
 	 */
-	rc = pnv_eeh_phb_poll(phb);
+	rc = pnv_eeh_poll(phb->opal_id);
 	if (option == EEH_RESET_DEACTIVATE) {
 		if (system_state < SYSTEM_RUNNING)
 			udelay(1000 * EEH_PE_RST_SETTLE_TIME);
@@ -805,7 +805,7 @@ static int pnv_eeh_root_reset(struct pci_controller *hose, int option)
 		goto out;
 
 	/* Poll state of the PHB until the request is done */
-	rc = pnv_eeh_phb_poll(phb);
+	rc = pnv_eeh_poll(phb->opal_id);
 	if (option == EEH_RESET_DEACTIVATE)
 		msleep(EEH_PE_RST_SETTLE_TIME);
 out: