Re: [Linaro-uefi] [PATCH v3 2/2] EmbeddedPkg/DwEmmc: Adjust FIFO threshold

On 7 July 2017 at 17:21, Jun Nie jun.nie@linaro.org wrote:

Adjust FIFO threshold according to FIFO depth. Skip the adjustment if we do not have FIFO depth info.

Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jun Nie jun.nie@linaro.org

---

EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmc.h | 6 +++++ EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c | 42 +++++++++++++++++++++++++++++ EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf | 1 + EmbeddedPkg/EmbeddedPkg.dec | 1 + 4 files changed, 50 insertions(+)

diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmc.h b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmc.h index 055f1e0..90c7676 100644 --- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmc.h +++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmc.h @@ -38,7 +38,10 @@ #define DWEMMC_RINTSTS ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x044) #define DWEMMC_STATUS ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x048) #define DWEMMC_FIFOTH ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x04c) +#define DWEMMC_TCBCNT ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x05c) +#define DWEMMC_TBBCNT ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x060) #define DWEMMC_DEBNCE ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x064) +#define DWEMMC_HCON ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x070) #define DWEMMC_UHSREG ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x074) #define DWEMMC_BMOD ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x080) #define DWEMMC_DBADDR ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x088) @@ -47,6 +50,7 @@ #define DWEMMC_DSCADDR ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x094) #define DWEMMC_BUFADDR ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0x098) #define DWEMMC_CARDTHRCTL ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0X100) +#define DWEMMC_DATA ((UINT32)PcdGet32 (PcdDwEmmcDxeBaseAddress) + 0X200)

#define CMD_UPDATE_CLK 0x80202000 #define CMD_START_BIT (1 << 31) @@ -124,4 +128,6 @@ #define DWEMMC_CARD_RD_THR(x) ((x & 0xfff) << 16) #define DWEMMC_CARD_RD_THR_EN (1 << 0)

+#define DWEMMC_GET_HDATA_WIDTH(x) (((x) >> 7) & 0x7)

#endif // __DWEMMC_H__ diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c index bb26b69..bd20f4b 100644 --- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c +++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c @@ -415,6 +415,47 @@ DwEmmcReceiveResponse ( return EFI_SUCCESS; }

+VOID +DwEmmcAdjustFifothresholdreshold (

• VOID
• )

+{

• /* DMA multiple transaction size map to reg value as array index */
• CONST UINT32 BurstSize[] = {1, 4, 8, 16, 32, 64, 128, 256};
• UINT32 BlkDepthInFifo, Fifothreshold, FifoWidth, FifoDepth;
• UINT32 BlkSize = DWEMMC_BLOCK_SIZE, Idx = 0, RxWatermark = 1, TxWatermark, TxWatermarkInvers;
• /* Skip FIFO adjustment if we do not have platform FIFO depth info */
• FifoDepth = PcdGet32 (PcdDwEmmcDxeFifoDepth);
• if (!FifoDepth) {
• return;
• }
• TxWatermark = FifoDepth / 2;
• TxWatermarkInvers = FifoDepth - TxWatermark;
• FifoWidth = DWEMMC_GET_HDATA_WIDTH (MmioRead32 (DWEMMC_HCON));
• if (!FifoWidth) {
• FifoWidth = 2;
• } else if (FifoWidth == 2) {
• FifoWidth = 8;
• } else {
• FifoWidth = 4;
• }
• BlkDepthInFifo = BlkSize / FifoWidth;
• Idx = ARRAY_SIZE (BurstSize) - 1;
• while (Idx && ((BlkDepthInFifo % BurstSize[Idx]) || (TxWatermarkInvers % BurstSize[Idx]))) {
• Idx--;
• }
• RxWatermark = BurstSize[Idx] - 1;
• Fifothreshold = DWEMMC_DMA_BURST_SIZE (Idx) | DWEMMC_FIFO_TWMARK (TxWatermark)

•       | DWEMMC_FIFO_RWMARK (RxWatermark);
  

• MmioWrite32 (DWEMMC_FIFOTH, Fifothreshold);

+}

EFI_STATUS PrepareDmaData ( IN DWEMMC_IDMAC_DESCRIPTOR* IdmacDesc, @@ -633,6 +674,7 @@ DwEmmcDxeInitialize (

Handle = NULL;

• DwEmmcAdjustFifothresholdreshold (); gpIdmacDesc = (DWEMMC_IDMAC_DESCRIPTOR *)AllocatePages (DWEMMC_MAX_DESC_PAGES); if (gpIdmacDesc == NULL) { return EFI_BUFFER_TOO_SMALL;

diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf index 99b4f99..bc4413e 100644 --- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf +++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf @@ -49,6 +49,7 @@ gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeBaseAddress gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeClockFrequencyInHz gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeMaxClockFreqInHz

• gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeFifoDepth

[Depex] TRUE diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec index 3cb30a4..4cd528a 100644 --- a/EmbeddedPkg/EmbeddedPkg.dec +++ b/EmbeddedPkg/EmbeddedPkg.dec @@ -168,6 +168,7 @@ gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeBaseAddress|0x0|UINT32|0x00000035 gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeClockFrequencyInHz|0x0|UINT32|0x00000036 gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeMaxClockFreqInHz|0x0|UINT32|0x00000037

• gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeFifoDepth|0x0|UINT32|0x00000038

  # # Android FastBoot

-- 1.9.1

Acked-by: Haojian Zhuang haojian.zhuang@linaro.org