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| author | Omer Shpigelman <oshpigelman@habana.ai> | 2019-02-28 09:46:11 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-28 13:04:59 +0100 |
| commit | 27ca384cb7c44b8b16ea43f9aed930664140360e (patch) | |
| tree | 9a8852fd2c48a5844dedf6799ec48d2473c70872 /drivers/misc/habanalabs/goya/goyaP.h | |
| parent | habanalabs: Dissociate RAZWI info from event types (diff) | |
| download | linux-27ca384cb7c44b8b16ea43f9aed930664140360e.tar.xz linux-27ca384cb7c44b8b16ea43f9aed930664140360e.zip | |
habanalabs: add MMU DRAM default page mapping
This patch provides a workaround for a H/W bug in Goya, where access to
RAZWI from TPC can cause PCI completion timeout.
The WA is to use the device MMU to map any unmapped DRAM memory to a
default page in the DRAM. That way, the TPC will never reach RAZWI upon
accessing a bad address in the DRAM.
When a DRAM page is mapped by the user, its default mapping is
overwritten. Once that page is unmapped, the MMU driver will map that page
to the default page.
To help debugging, the driver will set the default page area to 0x99 on
device initialization.
Signed-off-by: Omer Shpigelman <oshpigelman@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/habanalabs/goya/goyaP.h')
| -rw-r--r-- | drivers/misc/habanalabs/goya/goyaP.h | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/misc/habanalabs/goya/goyaP.h b/drivers/misc/habanalabs/goya/goyaP.h index 0631bc133cce..830551b6b062 100644 --- a/drivers/misc/habanalabs/goya/goyaP.h +++ b/drivers/misc/habanalabs/goya/goyaP.h @@ -56,18 +56,23 @@ /* DRAM Memory Map */ -#define CPU_FW_IMAGE_SIZE 0x10000000 /* 256MB */ -#define MMU_PAGE_TABLES_SIZE 0x0E000000 /* 224MB */ -#define MMU_CACHE_MNG_SIZE 0x00001000 /* 4KB */ -#define CPU_PQ_PKT_SIZE 0x00001000 /* 4KB */ -#define CPU_PQ_DATA_SIZE 0x01FFE000 /* 32MB - 8KB */ - -#define CPU_FW_IMAGE_ADDR DRAM_PHYS_BASE -#define MMU_PAGE_TABLES_ADDR (CPU_FW_IMAGE_ADDR + CPU_FW_IMAGE_SIZE) -#define MMU_CACHE_MNG_ADDR (MMU_PAGE_TABLES_ADDR + MMU_PAGE_TABLES_SIZE) -#define CPU_PQ_PKT_ADDR (MMU_CACHE_MNG_ADDR + MMU_CACHE_MNG_SIZE) -#define CPU_PQ_DATA_ADDR (CPU_PQ_PKT_ADDR + CPU_PQ_PKT_SIZE) -#define DRAM_BASE_ADDR_USER (CPU_PQ_DATA_ADDR + CPU_PQ_DATA_SIZE) +#define CPU_FW_IMAGE_SIZE 0x10000000 /* 256MB */ +#define MMU_PAGE_TABLES_SIZE 0x0DE00000 /* 222MB */ +#define MMU_DRAM_DEFAULT_PAGE_SIZE 0x00200000 /* 2MB */ +#define MMU_CACHE_MNG_SIZE 0x00001000 /* 4KB */ +#define CPU_PQ_PKT_SIZE 0x00001000 /* 4KB */ +#define CPU_PQ_DATA_SIZE 0x01FFE000 /* 32MB - 8KB */ + +#define CPU_FW_IMAGE_ADDR DRAM_PHYS_BASE +#define MMU_PAGE_TABLES_ADDR (CPU_FW_IMAGE_ADDR + CPU_FW_IMAGE_SIZE) +#define MMU_DRAM_DEFAULT_PAGE_ADDR (MMU_PAGE_TABLES_ADDR + \ + MMU_PAGE_TABLES_SIZE) +#define MMU_CACHE_MNG_ADDR (MMU_DRAM_DEFAULT_PAGE_ADDR + \ + MMU_DRAM_DEFAULT_PAGE_SIZE) +#define CPU_PQ_PKT_ADDR (MMU_CACHE_MNG_ADDR + \ + MMU_CACHE_MNG_SIZE) +#define CPU_PQ_DATA_ADDR (CPU_PQ_PKT_ADDR + CPU_PQ_PKT_SIZE) +#define DRAM_BASE_ADDR_USER (CPU_PQ_DATA_ADDR + CPU_PQ_DATA_SIZE) #if (DRAM_BASE_ADDR_USER != 0x20000000) #error "KMD must reserve 512MB" |