mtl: drv: mm: tlb: Add reporting of memory usage to PMC
The number of HPSRAM memory blocks in use is reported to the
PMC via the sideband channel supported by the communication widget.
@@ -28,6 +28,13 @@ static struct k_spinlock tlb_lock;
extern struct k_spinlock sys_mm_drv_common_lock;
static int hpsram_ref[L2_SRAM_BANK_NUM];
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+#include <adsp_comm_widget.h>
+
+static uint32_t used_pages;
+/* PMC uses 32 KB banks */
+static uint32_t used_pmc_banks_reported;
+#endif
/* Define a marker which is placed by the linker script just after
@@ -139,6 +146,21 @@ static int sys_mm_drv_hpsram_pwr(uint32_t bank_idx, bool enable, bool non_blocki
return 0;
}
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+static void sys_mm_drv_report_page_usage(void)
+{
+ /* PMC uses 32 KB banks */
+ uint32_t pmc_banks = ceiling_fraction(used_pages, KB(32) / CONFIG_MM_DRV_PAGE_SIZE);
+
+ if (used_pmc_banks_reported != pmc_banks) {
+ if (!adsp_comm_widget_pmc_send_ipc(pmc_banks)) {
+ /* Store reported value if message was sent successfully. */
+ used_pmc_banks_reported = pmc_banks;
+ }
+ }
+}
+#endif
+
int sys_mm_drv_map_page(void *virt, uintptr_t phys, uint32_t flags)
{
k_spinlock_key_t key;
@@ -207,8 +229,12 @@ int sys_mm_drv_map_page(void *virt, uintptr_t phys, uint32_t flags)
entry_idx = get_tlb_entry_idx(va);
- bank_idx = get_hpsram_bank_idx(pa);
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+ used_pages++;
+ sys_mm_drv_report_page_usage();
+#endif
+ bank_idx = get_hpsram_bank_idx(pa);
if (!hpsram_ref[bank_idx]++) {
sys_mm_drv_hpsram_pwr(bank_idx, true, false);
}
@@ -343,6 +369,11 @@ int sys_mm_drv_unmap_page(void *virt)
UINT_TO_POINTER(pa), 1);
bank_idx = get_hpsram_bank_idx(pa);
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+ used_pages--;
+ sys_mm_drv_report_page_usage();
+#endif
+
if (--hpsram_ref[bank_idx] == 0) {
sys_mm_drv_hpsram_pwr(bank_idx, false, false);
}
@@ -615,6 +646,9 @@ static int sys_mm_drv_mm_init(const struct device *dev)
for (int i = 0; i < L2_SRAM_BANK_NUM; i++) {
hpsram_ref[i] = SRAM_BANK_SIZE / CONFIG_MM_DRV_PAGE_SIZE;
}
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+ used_pages = L2_SRAM_BANK_NUM * SRAM_BANK_SIZE / CONFIG_MM_DRV_PAGE_SIZE;
+#endif
#ifdef CONFIG_MM_DRV_INTEL_ADSP_TLB_REMAP_UNUSED_RAM
/*
@@ -641,6 +675,13 @@ static int sys_mm_drv_mm_init(const struct device *dev)
unused_size);
#endif
+ /*
+ * Notify PMC about used HP-SRAM pages.
+ */
+#ifdef CONFIG_SOC_INTEL_COMM_WIDGET
+ sys_mm_drv_report_page_usage();
+#endif
+
return 0;
}
