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authorSergey Matyukevich <sergey.matyukevich.os@quantenna.com>2017-08-29 15:16:23 +0300
committerKalle Valo <kvalo@codeaurora.org>2017-08-31 15:57:40 +0300
commitf31039d4aea97d3827d0518f267f32a74dbdc498 (patch)
tree6eaa544a3bad8a7f5c692b5dc19393d74c39037d /drivers
parentb00edea3ed5fd4241d211671602d7a39d9482295 (diff)
downloadlinux-f31039d4aea97d3827d0518f267f32a74dbdc498.tar.xz
qtnfmac: implement 64-bit dma support
Use 64-bit dma for hosts with CONFIG_ARCH_DMA_ADDR_T_64BIT enabled. Signed-off-by: Sergey Matyukevich <sergey.matyukevich.os@quantenna.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c70
-rw-r--r--drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h10
-rw-r--r--drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h1
3 files changed, 65 insertions, 16 deletions
diff --git a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c
index 2921d8069bf2..502e72b7cdcc 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c
+++ b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie.c
@@ -403,10 +403,12 @@ static int alloc_bd_table(struct qtnf_pcie_bus_priv *priv)
priv->rx_bd_vbase = vaddr;
priv->rx_bd_pbase = paddr;
- writel(QTN_HOST_LO32(paddr),
- PCIE_HDP_TX_HOST_Q_BASE_L(priv->pcie_reg_base));
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(paddr),
PCIE_HDP_TX_HOST_Q_BASE_H(priv->pcie_reg_base));
+#endif
+ writel(QTN_HOST_LO32(paddr),
+ PCIE_HDP_TX_HOST_Q_BASE_L(priv->pcie_reg_base));
writel(priv->rx_bd_num | (sizeof(struct qtnf_rx_bd)) << 16,
PCIE_HDP_TX_HOST_Q_SZ_CTRL(priv->pcie_reg_base));
@@ -447,8 +449,10 @@ static int skb2rbd_attach(struct qtnf_pcie_bus_priv *priv, u16 index)
/* sync up all descriptor updates */
wmb();
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(paddr),
PCIE_HDP_HHBM_BUF_PTR_H(priv->pcie_reg_base));
+#endif
writel(QTN_HOST_LO32(paddr),
PCIE_HDP_HHBM_BUF_PTR(priv->pcie_reg_base));
@@ -503,9 +507,28 @@ static void free_xfer_buffers(void *data)
}
}
+static int qtnf_hhbm_init(struct qtnf_pcie_bus_priv *priv)
+{
+ u32 val;
+
+ val = readl(PCIE_HHBM_CONFIG(priv->pcie_reg_base));
+ val |= HHBM_CONFIG_SOFT_RESET;
+ writel(val, PCIE_HHBM_CONFIG(priv->pcie_reg_base));
+ usleep_range(50, 100);
+ val &= ~HHBM_CONFIG_SOFT_RESET;
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ val |= HHBM_64BIT;
+#endif
+ writel(val, PCIE_HHBM_CONFIG(priv->pcie_reg_base));
+ writel(priv->rx_bd_num, PCIE_HHBM_Q_LIMIT_REG(priv->pcie_reg_base));
+
+ return 0;
+}
+
static int qtnf_pcie_init_xfer(struct qtnf_pcie_bus_priv *priv)
{
int ret;
+ u32 val;
priv->tx_bd_num = tx_bd_size_param;
priv->rx_bd_num = rx_bd_size_param;
@@ -518,12 +541,32 @@ static int qtnf_pcie_init_xfer(struct qtnf_pcie_bus_priv *priv)
return -EINVAL;
}
+ val = priv->tx_bd_num * sizeof(struct qtnf_tx_bd);
+ if (val > PCIE_HHBM_MAX_SIZE) {
+ pr_err("tx_bd_size_param %u is too large\n",
+ priv->tx_bd_num);
+ return -EINVAL;
+ }
+
if (!priv->rx_bd_num || !is_power_of_2(priv->rx_bd_num)) {
pr_err("rx_bd_size_param %u is not power of two\n",
priv->rx_bd_num);
return -EINVAL;
}
+ val = priv->rx_bd_num * sizeof(dma_addr_t);
+ if (val > PCIE_HHBM_MAX_SIZE) {
+ pr_err("rx_bd_size_param %u is too large\n",
+ priv->rx_bd_num);
+ return -EINVAL;
+ }
+
+ ret = qtnf_hhbm_init(priv);
+ if (ret) {
+ pr_err("failed to init h/w queues\n");
+ return ret;
+ }
+
ret = alloc_skb_array(priv);
if (ret) {
pr_err("failed to allocate skb array\n");
@@ -653,10 +696,13 @@ static int qtnf_pcie_data_tx(struct qtnf_bus *bus, struct sk_buff *skb)
/* write new TX descriptor to PCIE_RX_FIFO on EP */
txbd_paddr = priv->tx_bd_pbase + i * sizeof(struct qtnf_tx_bd);
- writel(QTN_HOST_LO32(txbd_paddr),
- PCIE_HDP_HOST_WR_DESC0(priv->pcie_reg_base));
+
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
writel(QTN_HOST_HI32(txbd_paddr),
PCIE_HDP_HOST_WR_DESC0_H(priv->pcie_reg_base));
+#endif
+ writel(QTN_HOST_LO32(txbd_paddr),
+ PCIE_HDP_HOST_WR_DESC0(priv->pcie_reg_base));
if (++i >= priv->tx_bd_num)
i = 0;
@@ -1237,6 +1283,16 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
pr_debug("successful init of PCI device %x\n", pdev->device);
}
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+#else
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+#endif
+ if (ret) {
+ pr_err("PCIE DMA coherent mask init failed\n");
+ goto err_base;
+ }
+
pcim_pin_device(pdev);
pci_set_master(pdev);
@@ -1258,12 +1314,6 @@ static int qtnf_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
goto err_base;
}
- ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
- if (ret) {
- pr_err("PCIE DMA mask init failed\n");
- goto err_base;
- }
-
ret = devm_add_action(&pdev->dev, free_xfer_buffers, (void *)pcie_priv);
if (ret) {
pr_err("custom release callback init failed\n");
diff --git a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h
index 667f5ec457e3..c5a4e46d26ef 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h
+++ b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_ipc.h
@@ -57,16 +57,14 @@
| PCIE_HDP_INT_EP_RXDMA \
)
-#if BITS_PER_LONG == 64
+#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
#define QTN_HOST_HI32(a) ((u32)(((u64)a) >> 32))
#define QTN_HOST_LO32(a) ((u32)(((u64)a) & 0xffffffffUL))
#define QTN_HOST_ADDR(h, l) ((((u64)h) << 32) | ((u64)l))
-#elif BITS_PER_LONG == 32
+#else
#define QTN_HOST_HI32(a) 0
#define QTN_HOST_LO32(a) ((u32)(((u32)a) & 0xffffffffUL))
#define QTN_HOST_ADDR(h, l) ((u32)l)
-#else
-#error Unexpected BITS_PER_LONG value
#endif
#define QTN_SYSCTL_BAR 0
@@ -76,7 +74,7 @@
#define QTN_PCIE_BDA_VERSION 0x1002
#define PCIE_BDA_NAMELEN 32
-#define PCIE_HHBM_MAX_SIZE 512
+#define PCIE_HHBM_MAX_SIZE 2048
#define SKB_BUF_SIZE 2048
@@ -113,7 +111,7 @@ struct qtnf_pcie_bda {
__le32 bda_flashsz;
u8 bda_boardname[PCIE_BDA_NAMELEN];
__le32 bda_rc_msi_enabled;
- __le32 bda_hhbm_list[PCIE_HHBM_MAX_SIZE];
+ u8 bda_hhbm_list[PCIE_HHBM_MAX_SIZE];
__le32 bda_dsbw_start_index;
__le32 bda_dsbw_end_index;
__le32 bda_dsbw_total_bytes;
diff --git a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h
index 69696f118769..5b48b425fa7f 100644
--- a/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h
+++ b/drivers/net/wireless/quantenna/qtnfmac/pearl/pcie_regs_pearl.h
@@ -109,6 +109,7 @@
#define HHBM_WR_REQ (BIT(0))
#define HHBM_RD_REQ (BIT(1))
#define HHBM_DONE (BIT(31))
+#define HHBM_64BIT (BIT(10))
/* offsets for dual PCIE */
#define PCIE_PORT_LINK_CTL(base) ((base) + 0x0710)