ath11k: configure copy engine msi address in CE srng

Fill msi base address and msi data to be programmed in CE srang.
This is used by the srng to generate the msi interrupt.

Needed for PCI support.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.1.0.1-01238-QCAHKSWPL_SILICONZ-2
Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1597389030-13887-6-git-send-email-kvalo@codeaurora.org

drivers/net/wireless/ath/ath11k/ce.c

@@ -5,6 +5,7 @@
 
 #include "dp_rx.h"
 #include "debug.h"
+#include "hif.h"
 
 static const struct ce_attr host_ce_config_wlan[] = {
 	/* CE0: host->target HTC control and raw streams */
@@ -352,6 +353,31 @@ static void ath11k_ce_send_done_cb(struct ath11k_ce_pipe *pipe)
 	}
 }
 
+static void ath11k_ce_srng_msi_ring_params_setup(struct ath11k_base *ab, u32 ce_id,
+						 struct hal_srng_params *ring_params)
+{
+	u32 msi_data_start;
+	u32 msi_data_count;
+	u32 msi_irq_start;
+	u32 addr_lo;
+	u32 addr_hi;
+	int ret;
+
+	ret = ath11k_get_user_msi_vector(ab, "CE",
+					 &msi_data_count, &msi_data_start,
+					 &msi_irq_start);
+
+	if (ret)
+		return;
+
+	ath11k_get_msi_address(ab, &addr_lo, &addr_hi);
+
+	ring_params->msi_addr = addr_lo;
+	ring_params->msi_addr |= (dma_addr_t)(((uint64_t)addr_hi) << 32);
+	ring_params->msi_data = (ce_id % msi_data_count) + msi_data_start;
+	ring_params->flags |= HAL_SRNG_FLAGS_MSI_INTR;
+}
+
 static int ath11k_ce_init_ring(struct ath11k_base *ab,
 			       struct ath11k_ce_ring *ce_ring,
 			       int ce_id, enum hal_ring_type type)
@@ -395,6 +421,10 @@ static int ath11k_ce_init_ring(struct ath11k_base *ab,
 			    ret, ce_id);
 		return ret;
 	}
+
+	if (!(CE_ATTR_DIS_INTR & host_ce_config_wlan[ce_id].flags))
+		ath11k_ce_srng_msi_ring_params_setup(ab, ce_id, &params);
+
 	ce_ring->hal_ring_id = ret;
 
 	return 0;

drivers/net/wireless/ath/ath11k/hal.h

@@ -458,6 +458,8 @@ struct hal_srng_params {
 	u32 flags;
 	u32 max_buffer_len;
 	u32 low_threshold;
+	dma_addr_t msi_addr;
+	u32 msi_data;
 
 	/* Add more params as needed */
 };

drivers/net/wireless/ath/ath11k/hif.h

@@ -19,6 +19,11 @@ struct ath11k_hif_ops {
 	void (*power_down)(struct ath11k_base *sc);
 	int (*map_service_to_pipe)(struct ath11k_base *sc, u16 service_id,
 				   u8 *ul_pipe, u8 *dl_pipe);
+	int (*get_user_msi_vector)(struct ath11k_base *ab, char *user_name,
+				   int *num_vectors, u32 *user_base_data,
+				   u32 *base_vector);
+	void (*get_msi_address)(struct ath11k_base *ab, u32 *msi_addr_lo,
+				u32 *msi_addr_hi);
 };
 
 static inline int ath11k_hif_start(struct ath11k_base *sc)
@@ -66,4 +71,25 @@ static inline int ath11k_hif_map_service_to_pipe(struct ath11k_base *sc, u16 ser
 {
 	return sc->hif.ops->map_service_to_pipe(sc, service_id, ul_pipe, dl_pipe);
 }
+
+static inline int ath11k_get_user_msi_vector(struct ath11k_base *ab, char *user_name,
+					     int *num_vectors, u32 *user_base_data,
+					     u32 *base_vector)
+{
+	if (!ab->hif.ops->get_user_msi_vector)
+		return -EOPNOTSUPP;
+
+	return ab->hif.ops->get_user_msi_vector(ab, user_name, num_vectors,
+						user_base_data,
+						base_vector);
+}
+
+static inline void ath11k_get_msi_address(struct ath11k_base *ab, u32 *msi_addr_lo,
+					  u32 *msi_addr_hi)
+{
+	if (!ab->hif.ops->get_msi_address)
+		return;
+
+	ab->hif.ops->get_msi_address(ab, msi_addr_lo, msi_addr_hi);
+}
 #endif /* _HIF_H_ */

drivers/net/wireless/ath/ath11k/pci.c

@@ -339,6 +339,18 @@ int ath11k_pci_get_msi_irq(struct device *dev, unsigned int vector)
 	return pci_irq_vector(pci_dev, vector);
 }
 
+static void ath11k_pci_get_msi_address(struct ath11k_base *ab, u32 *msi_addr_lo,
+				       u32 *msi_addr_hi)
+{
+	struct pci_dev *pci_dev = to_pci_dev(ab->dev);
+
+	pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_LO,
+			      msi_addr_lo);
+
+	pci_read_config_dword(pci_dev, pci_dev->msi_cap + PCI_MSI_ADDRESS_HI,
+			      msi_addr_hi);
+}
+
 int ath11k_pci_get_user_msi_assignment(struct ath11k_pci *ab_pci, char *user_name,
 				       int *num_vectors, u32 *user_base_data,
 				       u32 *base_vector)
@@ -366,6 +378,17 @@ int ath11k_pci_get_user_msi_assignment(struct ath11k_pci *ab_pci, char *user_nam
 	return -EINVAL;
 }
 
+static int ath11k_get_user_msi_assignment(struct ath11k_base *ab, char *user_name,
+					  int *num_vectors, u32 *user_base_data,
+					  u32 *base_vector)
+{
+	struct ath11k_pci *ab_pci = ath11k_pci_priv(ab);
+
+	return ath11k_pci_get_user_msi_assignment(ab_pci, user_name,
+						  num_vectors, user_base_data,
+						  base_vector);
+}
+
 static void ath11k_pci_free_irq(struct ath11k_base *ab)
 {
 	int i, irq_idx;
@@ -634,6 +657,8 @@ static const struct ath11k_hif_ops ath11k_pci_hif_ops = {
 	.write32 = ath11k_pci_write32,
 	.power_down = ath11k_pci_power_down,
 	.power_up = ath11k_pci_power_up,
+	.get_msi_address =  ath11k_pci_get_msi_address,
+	.get_user_msi_vector = ath11k_get_user_msi_assignment,
 };
 
 static int ath11k_pci_probe(struct pci_dev *pdev,