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mtl: drv: mm: tlb: Add reporting of memory usage to PMC

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The number of HPSRAM memory blocks in use is reported to the
PMC via the sideband channel supported by the communication widget.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>
This commit is contained in:
Adrian Warecki 2022-08-24 12:57:36 +02:00 • committed by Carles Cufí
commit 0e17395bbf
1 changed files with 42 additions and 1 deletions
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43
drivers/mm/mm_drv_intel_adsp_mtl_tlb.c
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@ -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;
}