platform/x86:intel/pmc: Relocate lpm_req_guid to pmc_reg_map

Relocate the lpm_req_guid field from pmc_info to pmc_reg_map. The
previous implementation stored lpm_req_guid in pmc_info and relied
on pmc_core_find_guid() to retrieve the correct GUID, which was
unnecessary. Since lpm_req_guid is specific to PMC, pmc_reg_map is
a more appropriate location for this information.

Signed-off-by: Xi Pardee <xi.pardee@linux.intel.com>
Link: https://patch.msgid.link/20251014214548.629023-6-xi.pardee@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

drivers/platform/x86/intel/pmc/arl.c

@@ -281,6 +281,7 @@ static const struct pmc_reg_map arl_socs_reg_map = {
 	.etr3_offset = ETR3_OFFSET,
 	.pson_residency_offset = TGL_PSON_RESIDENCY_OFFSET,
 	.pson_residency_counter_step = TGL_PSON_RES_COUNTER_STEP,
+	.lpm_req_guid = SOCS_LPM_REQ_GUID,
 };
 
 static const struct pmc_bit_map arl_pchs_ltr_show_map[] = {
@@ -648,26 +649,23 @@ static const struct pmc_reg_map arl_pchs_reg_map = {
 	.lpm_num_maps = ADL_LPM_NUM_MAPS,
 	.lpm_reg_index = ARL_LPM_REG_INDEX,
 	.etr3_offset = ETR3_OFFSET,
+	.lpm_req_guid = PCHS_LPM_REQ_GUID,
 };
 
 static struct pmc_info arl_pmc_info_list[] = {
 	{
-		.guid	= IOEP_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_ARL_IOEP,
 		.map	= &mtl_ioep_reg_map,
 	},
 	{
-		.guid	= SOCS_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_ARL_SOCS,
 		.map	= &arl_socs_reg_map,
 	},
 	{
-		.guid	= PCHS_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_ARL_PCHS,
 		.map	= &arl_pchs_reg_map,
 	},
 	{
-		.guid	= SOCM_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_ARL_SOCM,
 		.map	= &mtl_socm_reg_map,
 	},

drivers/platform/x86/intel/pmc/core.c

@@ -1444,15 +1444,6 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev, struct pmc_dev_info
 	}
 }
 
-static u32 pmc_core_find_guid(struct pmc_info *list, const struct pmc_reg_map *map)
-{
-	for (; list->map; ++list)
-		if (list->map == map)
-			return list->guid;
-
-	return 0;
-}
-
 /*
  * This function retrieves low power mode requirement data from PMC Low
  * Power Mode (LPM) table.
@@ -1568,7 +1559,6 @@ static int pmc_core_get_telem_info(struct pmc_dev *pmcdev, struct pmc_dev_info *
 	struct pci_dev *pcidev __free(pci_dev_put) = NULL;
 	struct telem_endpoint *ep;
 	unsigned int pmc_idx;
-	u32 guid;
 	int ret;
 
 	pcidev = pci_get_domain_bus_and_slot(0, 0, PCI_DEVFN(20, pmc_dev_info->pci_func));
@@ -1582,11 +1572,10 @@ static int pmc_core_get_telem_info(struct pmc_dev *pmcdev, struct pmc_dev_info *
 		if (!pmc)
 			continue;
 
-		guid = pmc_core_find_guid(pmcdev->regmap_list, pmc->map);
-		if (!guid)
+		if (!pmc->map->lpm_req_guid)
 			return -ENXIO;
 
-		ep = pmt_telem_find_and_register_endpoint(pcidev, guid, 0);
+		ep = pmt_telem_find_and_register_endpoint(pcidev, pmc->map->lpm_req_guid, 0);
 		if (IS_ERR(ep)) {
 			dev_dbg(&pmcdev->pdev->dev, "couldn't get telem endpoint %pe", ep);
 			return -EPROBE_DEFER;

drivers/platform/x86/intel/pmc/core.h

@@ -356,6 +356,7 @@ struct pmc_bit_map {
  * @s0ix_blocker_offset PWRMBASE offset to S0ix blocker counter
  * @num_s0ix_blocker:	Number of S0ix blockers
  * @blocker_req_offset:	Telemetry offset to S0ix blocker low power mode substate requirement table
+ * @lpm_req_guid:	Telemetry GUID to read low power mode substate requirement table
  *
  * Each PCH has unique set of register offsets and bit indexes. This structure
  * captures them to have a common implementation.
@@ -397,6 +398,8 @@ struct pmc_reg_map {
 	const u8  *lpm_reg_index;
 	const u32 pson_residency_offset;
 	const u32 pson_residency_counter_step;
+	/* GUID for telemetry regions */
+	const u32 lpm_req_guid;
 };
 
 /**
@@ -406,7 +409,6 @@ struct pmc_reg_map {
  *			specific attributes
  */
 struct pmc_info {
-	u32 guid;
 	u16 devid;
 	const struct pmc_reg_map *map;
 };

drivers/platform/x86/intel/pmc/lnl.c

@@ -533,11 +533,11 @@ static const struct pmc_reg_map lnl_socm_reg_map = {
 	.s0ix_blocker_maps = lnl_blk_maps,
 	.s0ix_blocker_offset = LNL_S0IX_BLOCKER_OFFSET,
 	.lpm_reg_index = LNL_LPM_REG_INDEX,
+	.lpm_req_guid = SOCM_LPM_REQ_GUID,
 };
 
 static struct pmc_info lnl_pmc_info_list[] = {
 	{
-		.guid	= SOCM_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_LNL_SOCM,
 		.map	= &lnl_socm_reg_map,
 	},

drivers/platform/x86/intel/pmc/mtl.c

@@ -473,6 +473,7 @@ const struct pmc_reg_map mtl_socm_reg_map = {
 	.lpm_status_offset = MTL_LPM_STATUS_OFFSET,
 	.lpm_live_status_offset = MTL_LPM_LIVE_STATUS_OFFSET,
 	.lpm_reg_index = MTL_LPM_REG_INDEX,
+	.lpm_req_guid = SOCP_LPM_REQ_GUID,
 };
 
 static const struct pmc_bit_map mtl_ioep_pfear_map[] = {
@@ -797,6 +798,7 @@ const struct pmc_reg_map mtl_ioep_reg_map = {
 	.lpm_en_offset = MTL_LPM_EN_OFFSET,
 	.lpm_sts_latch_en_offset = MTL_LPM_STATUS_LATCH_EN_OFFSET,
 	.lpm_reg_index = MTL_LPM_REG_INDEX,
+	.lpm_req_guid = IOEP_LPM_REQ_GUID,
 };
 
 static const struct pmc_bit_map mtl_ioem_pfear_map[] = {
@@ -944,21 +946,19 @@ static const struct pmc_reg_map mtl_ioem_reg_map = {
 	.lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2,
 	.lpm_residency_offset = MTL_LPM_RESIDENCY_OFFSET,
 	.lpm_reg_index = MTL_LPM_REG_INDEX,
+	.lpm_req_guid = IOEM_LPM_REQ_GUID,
 };
 
 static struct pmc_info mtl_pmc_info_list[] = {
 	{
-		.guid	= SOCP_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_MTL_SOCM,
 		.map	= &mtl_socm_reg_map,
 	},
 	{
-		.guid	= IOEP_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_MTL_IOEP,
 		.map	= &mtl_ioep_reg_map,
 	},
 	{
-		.guid	= IOEM_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_MTL_IOEM,
 		.map	= &mtl_ioem_reg_map
 	},

drivers/platform/x86/intel/pmc/ptl.c

@@ -528,16 +528,15 @@ static const struct pmc_reg_map ptl_pcdp_reg_map = {
 	.s0ix_blocker_offset = LNL_S0IX_BLOCKER_OFFSET,
 	.num_s0ix_blocker = PTL_NUM_S0IX_BLOCKER,
 	.blocker_req_offset = PTL_BLK_REQ_OFFSET,
+	.lpm_req_guid = PCDP_LPM_REQ_GUID,
 };
 
 static struct pmc_info ptl_pmc_info_list[] = {
 	{
-		.guid	= PCDP_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_PTL_PCDH,
 		.map	= &ptl_pcdp_reg_map,
 	},
 	{
-		.guid   = PCDP_LPM_REQ_GUID,
 		.devid  = PMC_DEVID_PTL_PCDP,
 		.map    = &ptl_pcdp_reg_map,
 	},