brcmfmac: add pcie host dongle interface rev6 support

In rev6 of pcie host dongle interface protocol, host needs to maximum
supported ring number from dongle shared memory and set up ring buffer
and ring indices offset accordingly.

Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

1 files changed, 102 insertions, 69 deletions

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
index 3deba90c7eb5..048027f2085b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
@@ -135,7 +135,7 @@ static struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
 						 BRCMF_PCIE_MB_INT_D2H3_DB1)
 
 #define BRCMF_PCIE_MIN_SHARED_VERSION		5
-#define BRCMF_PCIE_MAX_SHARED_VERSION		5
+#define BRCMF_PCIE_MAX_SHARED_VERSION		6
 #define BRCMF_PCIE_SHARED_VERSION_MASK		0x00FF
 #define BRCMF_PCIE_SHARED_DMA_INDEX		0x10000
 #define BRCMF_PCIE_SHARED_DMA_2B_IDX		0x100000
@@ -166,17 +166,6 @@ static struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
 #define BRCMF_RING_MEM_SZ			16
 #define BRCMF_RING_STATE_SZ			8
 
-#define BRCMF_SHARED_RING_H2D_W_IDX_PTR_OFFSET	4
-#define BRCMF_SHARED_RING_H2D_R_IDX_PTR_OFFSET	8
-#define BRCMF_SHARED_RING_D2H_W_IDX_PTR_OFFSET	12
-#define BRCMF_SHARED_RING_D2H_R_IDX_PTR_OFFSET	16
-#define BRCMF_SHARED_RING_H2D_WP_HADDR_OFFSET	20
-#define BRCMF_SHARED_RING_H2D_RP_HADDR_OFFSET	28
-#define BRCMF_SHARED_RING_D2H_WP_HADDR_OFFSET	36
-#define BRCMF_SHARED_RING_D2H_RP_HADDR_OFFSET	44
-#define BRCMF_SHARED_RING_TCM_MEMLOC_OFFSET	0
-#define BRCMF_SHARED_RING_MAX_SUB_QUEUES	52
-
 #define BRCMF_DEF_MAX_RXBUFPOST			255
 
 #define BRCMF_CONSOLE_BUFADDR_OFFSET		8
@@ -231,7 +220,9 @@ struct brcmf_pcie_shared_info {
 	struct brcmf_pcie_ringbuf *commonrings[BRCMF_NROF_COMMON_MSGRINGS];
 	struct brcmf_pcie_ringbuf *flowrings;
 	u16 max_rxbufpost;
-	u32 nrof_flowrings;
+	u16 max_flowrings;
+	u16 max_submissionrings;
+	u16 max_completionrings;
 	u32 rx_dataoffset;
 	u32 htod_mb_data_addr;
 	u32 dtoh_mb_data_addr;
@@ -241,6 +232,7 @@ struct brcmf_pcie_shared_info {
 	dma_addr_t scratch_dmahandle;
 	void *ringupd;
 	dma_addr_t ringupd_dmahandle;
+	u8 version;
 };
 
 struct brcmf_pcie_core_info {
@@ -284,6 +276,36 @@ struct brcmf_pcie_ringbuf {
 	u8 id;
 };
 
+/**
+ * struct brcmf_pcie_dhi_ringinfo - dongle/host interface shared ring info
+ *
+ * @ringmem: dongle memory pointer to ring memory location
+ * @h2d_w_idx_ptr: h2d ring write indices dongle memory pointers
+ * @h2d_r_idx_ptr: h2d ring read indices dongle memory pointers
+ * @d2h_w_idx_ptr: d2h ring write indices dongle memory pointers
+ * @d2h_r_idx_ptr: d2h ring read indices dongle memory pointers
+ * @h2d_w_idx_hostaddr: h2d ring write indices host memory pointers
+ * @h2d_r_idx_hostaddr: h2d ring read indices host memory pointers
+ * @d2h_w_idx_hostaddr: d2h ring write indices host memory pointers
+ * @d2h_r_idx_hostaddr: d2h ring reaD indices host memory pointers
+ * @max_flowrings: maximum number of tx flow rings supported.
+ * @max_submissionrings: maximum number of submission rings(h2d) supported.
+ * @max_completionrings: maximum number of completion rings(d2h) supported.
+ */
+struct brcmf_pcie_dhi_ringinfo {
+	__le32			ringmem;
+	__le32			h2d_w_idx_ptr;
+	__le32			h2d_r_idx_ptr;
+	__le32			d2h_w_idx_ptr;
+	__le32			d2h_r_idx_ptr;
+	struct msgbuf_buf_addr	h2d_w_idx_hostaddr;
+	struct msgbuf_buf_addr	h2d_r_idx_hostaddr;
+	struct msgbuf_buf_addr	d2h_w_idx_hostaddr;
+	struct msgbuf_buf_addr	d2h_r_idx_hostaddr;
+	__le16			max_flowrings;
+	__le16			max_submissionrings;
+	__le16			max_completionrings;
+};
 
 static const u32 brcmf_ring_max_item[BRCMF_NROF_COMMON_MSGRINGS] = {
 	BRCMF_H2D_MSGRING_CONTROL_SUBMIT_MAX_ITEM,
@@ -1054,26 +1076,35 @@ static int brcmf_pcie_init_ringbuffers(struct brcmf_pciedev_info *devinfo)
 {
 	struct brcmf_pcie_ringbuf *ring;
 	struct brcmf_pcie_ringbuf *rings;
-	u32 ring_addr;
 	u32 d2h_w_idx_ptr;
 	u32 d2h_r_idx_ptr;
 	u32 h2d_w_idx_ptr;
 	u32 h2d_r_idx_ptr;
-	u32 addr;
 	u32 ring_mem_ptr;
 	u32 i;
 	u64 address;
 	u32 bufsz;
-	u16 max_sub_queues;
 	u8 idx_offset;
-
-	ring_addr = devinfo->shared.ring_info_addr;
-	brcmf_dbg(PCIE, "Base ring addr = 0x%08x\n", ring_addr);
-	addr = ring_addr + BRCMF_SHARED_RING_MAX_SUB_QUEUES;
-	max_sub_queues = brcmf_pcie_read_tcm16(devinfo, addr);
+	struct brcmf_pcie_dhi_ringinfo ringinfo;
+	u16 max_flowrings;
+	u16 max_submissionrings;
+	u16 max_completionrings;
+
+	memcpy_fromio(&ringinfo, devinfo->tcm + devinfo->shared.ring_info_addr,
+		      sizeof(ringinfo));
+	if (devinfo->shared.version >= 6) {
+		max_submissionrings = le16_to_cpu(ringinfo.max_submissionrings);
+		max_flowrings = le16_to_cpu(ringinfo.max_flowrings);
+		max_completionrings = le16_to_cpu(ringinfo.max_completionrings);
+	} else {
+		max_submissionrings = le16_to_cpu(ringinfo.max_flowrings);
+		max_flowrings = max_submissionrings -
+				BRCMF_NROF_H2D_COMMON_MSGRINGS;
+		max_completionrings = BRCMF_NROF_D2H_COMMON_MSGRINGS;
+	}
 
 	if (devinfo->dma_idx_sz != 0) {
-		bufsz = (BRCMF_NROF_D2H_COMMON_MSGRINGS + max_sub_queues) *
+		bufsz = (max_submissionrings + max_completionrings) *
 			devinfo->dma_idx_sz * 2;
 		devinfo->idxbuf = dma_alloc_coherent(&devinfo->pdev->dev, bufsz,
 						     &devinfo->idxbuf_dmahandle,
@@ -1083,14 +1114,10 @@ static int brcmf_pcie_init_ringbuffers(struct brcmf_pciedev_info *devinfo)
 	}
 
 	if (devinfo->dma_idx_sz == 0) {
-		addr = ring_addr + BRCMF_SHARED_RING_D2H_W_IDX_PTR_OFFSET;
-		d2h_w_idx_ptr = brcmf_pcie_read_tcm32(devinfo, addr);
-		addr = ring_addr + BRCMF_SHARED_RING_D2H_R_IDX_PTR_OFFSET;
-		d2h_r_idx_ptr = brcmf_pcie_read_tcm32(devinfo, addr);
-		addr = ring_addr + BRCMF_SHARED_RING_H2D_W_IDX_PTR_OFFSET;
-		h2d_w_idx_ptr = brcmf_pcie_read_tcm32(devinfo, addr);
-		addr = ring_addr + BRCMF_SHARED_RING_H2D_R_IDX_PTR_OFFSET;
-		h2d_r_idx_ptr = brcmf_pcie_read_tcm32(devinfo, addr);
+		d2h_w_idx_ptr = le32_to_cpu(ringinfo.d2h_w_idx_ptr);
+		d2h_r_idx_ptr = le32_to_cpu(ringinfo.d2h_r_idx_ptr);
+		h2d_w_idx_ptr = le32_to_cpu(ringinfo.h2d_w_idx_ptr);
+		h2d_r_idx_ptr = le32_to_cpu(ringinfo.h2d_r_idx_ptr);
 		idx_offset = sizeof(u32);
 		devinfo->write_ptr = brcmf_pcie_write_tcm16;
 		devinfo->read_ptr = brcmf_pcie_read_tcm16;
@@ -1103,34 +1130,42 @@ static int brcmf_pcie_init_ringbuffers(struct brcmf_pciedev_info *devinfo)
 		devinfo->read_ptr = brcmf_pcie_read_idx;
 
 		h2d_w_idx_ptr = 0;
-		addr = ring_addr + BRCMF_SHARED_RING_H2D_WP_HADDR_OFFSET;
 		address = (u64)devinfo->idxbuf_dmahandle;
-		brcmf_pcie_write_tcm32(devinfo, addr, address & 0xffffffff);
-		brcmf_pcie_write_tcm32(devinfo, addr + 4, address >> 32);
-
-		h2d_r_idx_ptr = h2d_w_idx_ptr + max_sub_queues * idx_offset;
-		addr = ring_addr + BRCMF_SHARED_RING_H2D_RP_HADDR_OFFSET;
-		address += max_sub_queues * idx_offset;
-		brcmf_pcie_write_tcm32(devinfo, addr, address & 0xffffffff);
-		brcmf_pcie_write_tcm32(devinfo, addr + 4, address >> 32);
-
-		d2h_w_idx_ptr = h2d_r_idx_ptr + max_sub_queues * idx_offset;
-		addr = ring_addr + BRCMF_SHARED_RING_D2H_WP_HADDR_OFFSET;
-		address += max_sub_queues * idx_offset;
-		brcmf_pcie_write_tcm32(devinfo, addr, address & 0xffffffff);
-		brcmf_pcie_write_tcm32(devinfo, addr + 4, address >> 32);
+		ringinfo.h2d_w_idx_hostaddr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+		ringinfo.h2d_w_idx_hostaddr.high_addr =
+			cpu_to_le32(address >> 32);
+
+		h2d_r_idx_ptr = h2d_w_idx_ptr +
+				max_submissionrings * idx_offset;
+		address += max_submissionrings * idx_offset;
+		ringinfo.h2d_r_idx_hostaddr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+		ringinfo.h2d_r_idx_hostaddr.high_addr =
+			cpu_to_le32(address >> 32);
+
+		d2h_w_idx_ptr = h2d_r_idx_ptr +
+				max_submissionrings * idx_offset;
+		address += max_submissionrings * idx_offset;
+		ringinfo.d2h_w_idx_hostaddr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+		ringinfo.d2h_w_idx_hostaddr.high_addr =
+			cpu_to_le32(address >> 32);
 
 		d2h_r_idx_ptr = d2h_w_idx_ptr +
-				BRCMF_NROF_D2H_COMMON_MSGRINGS * idx_offset;
-		addr = ring_addr + BRCMF_SHARED_RING_D2H_RP_HADDR_OFFSET;
-		address += BRCMF_NROF_D2H_COMMON_MSGRINGS * idx_offset;
-		brcmf_pcie_write_tcm32(devinfo, addr, address & 0xffffffff);
-		brcmf_pcie_write_tcm32(devinfo, addr + 4, address >> 32);
+				max_completionrings * idx_offset;
+		address += max_completionrings * idx_offset;
+		ringinfo.d2h_r_idx_hostaddr.low_addr =
+			cpu_to_le32(address & 0xffffffff);
+		ringinfo.d2h_r_idx_hostaddr.high_addr =
+			cpu_to_le32(address >> 32);
+
+		memcpy_toio(devinfo->tcm + devinfo->shared.ring_info_addr,
+			    &ringinfo, sizeof(ringinfo));
 		brcmf_dbg(PCIE, "Using host memory indices\n");
 	}
 
-	addr = ring_addr + BRCMF_SHARED_RING_TCM_MEMLOC_OFFSET;
-	ring_mem_ptr = brcmf_pcie_read_tcm32(devinfo, addr);
+	ring_mem_ptr = le32_to_cpu(ringinfo.ringmem);
 
 	for (i = 0; i < BRCMF_NROF_H2D_COMMON_MSGRINGS; i++) {
 		ring = brcmf_pcie_alloc_dma_and_ring(devinfo, i, ring_mem_ptr);
@@ -1161,20 +1196,19 @@ static int brcmf_pcie_init_ringbuffers(struct brcmf_pciedev_info *devinfo)
 		ring_mem_ptr += BRCMF_RING_MEM_SZ;
 	}
 
-	devinfo->shared.nrof_flowrings =
-			max_sub_queues - BRCMF_NROF_H2D_COMMON_MSGRINGS;
-	rings = kcalloc(devinfo->shared.nrof_flowrings, sizeof(*ring),
-			GFP_KERNEL);
+	devinfo->shared.max_flowrings = max_flowrings;
+	devinfo->shared.max_submissionrings = max_submissionrings;
+	devinfo->shared.max_completionrings = max_completionrings;
+	rings = kcalloc(max_flowrings, sizeof(*ring), GFP_KERNEL);
 	if (!rings)
 		goto fail;
 
-	brcmf_dbg(PCIE, "Nr of flowrings is %d\n",
-		  devinfo->shared.nrof_flowrings);
+	brcmf_dbg(PCIE, "Nr of flowrings is %d\n", max_flowrings);
 
-	for (i = 0; i < devinfo->shared.nrof_flowrings; i++) {
+	for (i = 0; i < max_flowrings; i++) {
 		ring = &rings[i];
 		ring->devinfo = devinfo;
-		ring->id = i + BRCMF_NROF_COMMON_MSGRINGS;
+		ring->id = i + BRCMF_H2D_MSGRING_FLOWRING_IDSTART;
 		brcmf_commonring_register_cb(&ring->commonring,
 					     brcmf_pcie_ring_mb_ring_bell,
 					     brcmf_pcie_ring_mb_update_rptr,
@@ -1357,17 +1391,16 @@ brcmf_pcie_init_share_ram_info(struct brcmf_pciedev_info *devinfo,
 {
 	struct brcmf_pcie_shared_info *shared;
 	u32 addr;
-	u32 version;
 
 	shared = &devinfo->shared;
 	shared->tcm_base_address = sharedram_addr;
 
 	shared->flags = brcmf_pcie_read_tcm32(devinfo, sharedram_addr);
-	version = shared->flags & BRCMF_PCIE_SHARED_VERSION_MASK;
-	brcmf_dbg(PCIE, "PCIe protocol version %d\n", version);
-	if ((version > BRCMF_PCIE_MAX_SHARED_VERSION) ||
-	    (version < BRCMF_PCIE_MIN_SHARED_VERSION)) {
-		brcmf_err("Unsupported PCIE version %d\n", version);
+	shared->version = (u8)(shared->flags & BRCMF_PCIE_SHARED_VERSION_MASK);
+	brcmf_dbg(PCIE, "PCIe protocol version %d\n", shared->version);
+	if ((shared->version > BRCMF_PCIE_MAX_SHARED_VERSION) ||
+	    (shared->version < BRCMF_PCIE_MIN_SHARED_VERSION)) {
+		brcmf_err("Unsupported PCIE version %d\n", shared->version);
 		return -EINVAL;
 	}
 
@@ -1661,18 +1694,18 @@ static void brcmf_pcie_setup(struct device *dev, const struct firmware *fw,
 		bus->msgbuf->commonrings[i] =
 				&devinfo->shared.commonrings[i]->commonring;
 
-	flowrings = kcalloc(devinfo->shared.nrof_flowrings, sizeof(*flowrings),
+	flowrings = kcalloc(devinfo->shared.max_flowrings, sizeof(*flowrings),
 			    GFP_KERNEL);
 	if (!flowrings)
 		goto fail;
 
-	for (i = 0; i < devinfo->shared.nrof_flowrings; i++)
+	for (i = 0; i < devinfo->shared.max_flowrings; i++)
 		flowrings[i] = &devinfo->shared.flowrings[i].commonring;
 	bus->msgbuf->flowrings = flowrings;
 
 	bus->msgbuf->rx_dataoffset = devinfo->shared.rx_dataoffset;
 	bus->msgbuf->max_rxbufpost = devinfo->shared.max_rxbufpost;
-	bus->msgbuf->nrof_flowrings = devinfo->shared.nrof_flowrings;
+	bus->msgbuf->max_flowrings = devinfo->shared.max_flowrings;
 
 	init_waitqueue_head(&devinfo->mbdata_resp_wait);